Mobile communication system, method and apparatus

(56) References cited:

WO-A1-2006/134946 US-A1- 2006 002 339

US-A1-2006 116 080 • HUAWEI: Further considerations on multiplexing method of Shared Control Channel in Uplink Single-Carrier FDMA, INTERNET CITATION, 11 November 2005 (2005-11-11), XP002451165, Retrieved from the Internet: URL:http://www.3gpp.org/ftp/tsg_ran/WG1_RL 1/TSGR1_43/Docs/R1-051430zip [retrieved on

2007-09-17] • PANASONIC: CQI Feedback Control and Content in E-UTRA, 3GPP DRAFT; R1-072077, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921

SOPHIA-ANTIPOLIS CEDEX ; FRANCÉ, vol. RAN WG1, no. Köbe, Japan; 20070502, 2 May 2007 (2007-05-02), XP050105831, [retrieved on 2007-05-02] • PANASONIC: Indication of combination between L1/L2 controlsignaling and uplinkdata, 3RD GENERATION PARTNERSHIP PROJECT (3GPP); TECHNICALSPECIFICATION GROUP (TSG) RÁDIÓ ACCESS NETWORK (RAN); WORKINGGROUP 1 (WG1), XX, XX, vol. R1-060793, 27 March 2006 (2006-03-27) , pages

1-3, XP003019431, • NTT DOCOMO, FUJITSU, NEC, SHARP, TOSHIBA CORPORATION: ’Single-Carrier Based Multiplexing of Uplimk L1/L2 Control Channel’ 3GPPTSG-RAN WG1 LTE AD HOC vol. R1061674, June 2006, XP003019433 • PANASONIC: 'Indication of Combination between L1/L2 control signaling and uplink data’ 3GPP TSG-RAN WG1 MEETING #44BIS vol. R1-060793, March 2006, XP003019431

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ΕΡ 2 187 666 Β1

Description

Technical Field [0001] The present invention relates to a mobile communication system in which a mobile station apparátus measures reception quality of signals received from a base station apparátus and transmits, to the base station apparátus, reception quality information while the base station apparátus allocates resources based on the reception quality information received from the mobile station apparátus, and relates to a base station apparátus and a mobile station apparátus which are applied to the mobile communication system.

Background Art [0002] Recently, the demand fordata communication has been increasing in thefield of mobile communication systems. As such, various techniques fór higher utilization efficiency of frequency have been proposed fór accommodating the increase in communication data caused by the data transmission demands. One ofthe techniques fór improving the frequency utilization efficiency is the orthogonal frequency division multiple access (OFDMA). The OFDMA relates to a modulation method used fór all cells within a communication area composed of cells to communicate with each other using the same frequency, and can realize faster data communication.

[0003] Asforscheduling of transmission packets in an OFDMA system, a method is well-known in which mobile station apparatuses transmit, to a base station apparátus, channel quality indicator(CQI) which is information indicating reception quality of a downlink state fór sub-carriers in wideband, while the base station apparátus performs packet scheduling based on the CQI of sub-carriers in wideband received from each mobile station apparatuses.

[0004] Additionally, a technique is alsó well-known in which fór transmission packet scheduling in an orthogonal frequency division multiplexing (OFDM) system that utilizes a plurality of sub-carriers, mobile station apparatuses evaluate each channel States of a downlink (frequency characteristics, i.e., frequency-dependent characteristics of transmission losses) and transmit, to the base station apparátus, information obtained by quantizing each channel States, while the base station apparátus determines sub-carriers to be allocated fór each mobile station apparatuses based on the transmitted information (Patent document 1) .

[0005] Fig. 14 illustrates a communication method of the prior art between a base station apparátus and a mobile station apparátus. Having received downlink information of a downlink used fór reception quality measurement from the base station apparátus, the mobile station apparátus measures reception quality of each channel based on the downlink information to create a channel profile of a propagation path.

[0006] The channel profile created by the mobile station apparátus is transmitted, from the mobile station apparátus to the base station apparátus, as reception quality information by using an uplink. Based on the reception quality information, the base station apparátus performs adaptive modulation and coding or frequency selective scheduling fór signals to be transmitted from the base station apparátus to the mobile station apparátus.

[0007] As fór transmission of the reception quality information to the base station apparátus by the mobile station apparátus, in Evolved Universal Terrestrial Rádió Access studied under the third Generation Partnership Project (3GPP) which is international standardization project, it is studying that the reception quality information is transmitted by using a dedicated uplink control channel (Physical Uplink Control Channel, hereinafter referred to as PUCCH). And it is studying that an uplink data and the reception quality information are simultaneously transmitted by using an uplink data channel (Physical Uplink Shared Channel, hereinafter referred to as PUSCH).

[0008] Fór example, in the Non-Patent document 1, there is proposed a method to transmit, in transmitting the reception quality information from the mobile station apparátus to the base station apparátus, the reception quality information by using the PUCCH orthe PUSCH depending on a kind of Services different in required the reception quality information. [0009] [Patent document 1] JP-A-2005-130491 [0010] [Non-Patent document 1] CQI handling during DRX, 3GPP, TSG RAN WG2 Meeting #58, R2-071901, May, 2007 [0011] US 2006/002339 A1 discloses a mobile communication system where a mobile station apparátus transmits to a base station apparátus reception quality information indicating quality of a downlink signal. The transmission cycle and timing offset ofthe reception quality information is specified by the base station as parameters in advance. The data is spread by a spreader using a channel spreading code, is multiplexed by a mobile station identification code at a scrambler.

[0012] Non-Patent document HUAWEI: Further considerations on multiplexing method of Shared Control Channel in Uplink Single-Carrier FDMA, INTERNET CITATION, 11 November 2005 (2005-11-11), Retrieved from the Internet: URL: http://www. 3gpp.org/ftp/tsg_ran/WG1_RL1/TSGR1_43/Docs/R1-051430zip [retrieved on 2007-09-17] describes a multiplexing method of shared Control Channel in Uplink Single-Carrier FDMA in which the physical layer signaling fór the uplink is divided intő two categories: data-dependent and data-independent signal ing. Data-independent signaling

EP 2 187 666 Β1 is e.g. the reception quality information. The data-independent signaling is time multiplexed in a pre-defined time-frequency region.

[0013] Non-Patent document PANASONIC: CQI Feedback Control and Content in E-UTRA, 3GPP DRAFT; R1-072077, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBLIE COMPETENCE CNETRE; 650, ROUTE DES LUCIOLES; F-06921 SOPHIA-ANTIPOLIS CEDEX; FRANCÉ, vol. RAN WG1, no. Köbe, Japan; 20070502, 2 May 2007 (2007-05-02), XP050105831 describes Solutions about how to control the transmission ofthe CQI message itself, as well as the content depending on various aspects ofthe deployment and scenarios.

Disclosure ofthe Invention

Problems to be Solved by the Invention [0014] However, in the prior árts, there are no specific descriptions about mapping of respective information in simultaneously transmitting the uplinkdata and the reception quality information from the mobile station apparátus to the base station apparátus.

[0015] As used herein, the phrase mapping of respective information refers to specific mapping of respective information (the uplink data and the reception quality information) as transmission data, that is, their specific mapping in a resource unit ofthe PUSCH (the minimum unit of a time-frequency block of the PUSCH) in simultaneously transmitting the uplink data and the reception quality information from the mobile station apparátus to a base station apparátus,. [0016] In case that the uplink data and the reception quality information are simultaneously transmitted from a mobile station apparátus to a base station apparátus, the base station apparátus can separate respective data by recognizing the mapping ofthe uplink data and the reception quality information. The base station apparátus can extract only the reception quality information from the simultaneously transmitted uplink data and reception quality information, and efficiently transmit a downlink data by performing adaptive modulation and coding and/orfrequency selective scheduling based on the extracted information.

[0017] The information amount of control signals transmitted from the base station apparátus fór specifying the mapping of the uplink data and the reception quality information simultaneously transmitted from the mobile station apparátus needs to be kept small. Downlink resources would be inefficiently utilized if the base station apparátus transmits the control signals fór specifying the mapping of respective information every time in transmitting the reception quality information from the mobile station apparátus.

[0018] Additionally, there is another demand to reduce any delay in changing the mapping ofthe uplink data and the reception quality information simultaneously transmitted from the mobile station apparátus. If any significant delay occurs in changing the mapping of respective information in simultaneously transmitting the uplinkdata and the reception quality information from the mobile station apparátus, another significant delay would arise until the reception quality information arrives at the base station apparátus. The base station apparátus applies adaptive modulation and coding and/orfrequency selective scheduling to the downlink data according to the reception quality information transmitted from the mobile station apparátus.

[0019] If any significant delay occurs in transmitting the reception quality information, the modulation and coding and the frequency bánd used fór uplink data transmission most appropriate fór the mobile station apparátus would change. Even if the base station apparátus performs adaptive modulation and coding and/or frequency selective scheduling based on the reception quality information with a significant delay, it would fail to control the mobile station apparátus in an appropriate mannerfor the mobile station apparátus at that time. This would result in inefficient use ofthe downlink resources.

[0020] Furthermore, modulation scheme and coding rate to be specified in transmitting the uplink data are specified by the base station apparátus estimating the environment of a propagation path based on the uplink data or a reference signal transmitted from the mobile station apparátus. Therefore, in case that the uplink data and the reception quality information are simultaneously transmitted, if modulation scheme and coding rate ofthe reception quality information cannot comply with those of the uplink data specified by the base station apparátus, the probability of successful transmission ofthe reception quality information would decrease.

[0021] The description above alsó applies to ACK/NACK of the Hybrid Automatic Repeat Request (HARQ) fór the downlink data, which is alsó an uplink information like the reception quality information. That is, the information amount of control signals transmitted from the base station apparátus fór specifying the mapping of the uplink data and the ACK/NACK simultaneously transmitted from the mobile station apparátus to the base station apparátus needs to be kept small. Alsó, the delay in changing the mapping must be small. Furthermore, modulation scheme and coding rate of the ACK/NACK simultaneously transmitted with the uplink data must comply with those of the uplink data specified by the base station apparátus. Any specific descriptions about those three conditions: the information amount of control information fór specifying the mapping of respective information, the delay occurring in changing the mapping of respective information, and the compliance with modulation scheme and coding rate ofthe uplinkdata are nőt provided in the prior art.

EP 2 187 666 Β1 [0022] In summary, what is important is how to specify the way of simultaneously transmitting the uplink data and the reception quality Information as well as the uplink data and the ACK/NACK from the mobile station apparátus to the base station apparátus. In order to address the problem, the Information amount of control signals fór specifying the mapping of respective Information from the base station apparátus, the delay occurring in changing the mapping of respective Information, and the compliance with modulation scheme and coding rate of the uplink data specified by the base station apparátus, need to be taken intő account.

[0023] The present invention has been made in view of such circumstances, and provides a mobile communication system, a base station apparátus and a mobile station apparátus that can reduce the amount of control Information fór specifying the transmission method fór simultaneously transmitting the uplink data and the reception quality Information as well as the uplink data and the AGK/NACK, reduce the delay occurring in changing the transmission method, and realize the mapping ofthe uplink data and the reception quality Information and that ofthe uplink data and the ACK/NACK, in compliance with modulation scheme and coding rate ofthe uplink data specified by the base station apparátus.

Means fór Solving the Problems [0024] In order to achieve above objects, the invention provides the following means. Namely, a mobile communication system according to the present invention is directed to a mobile communication system in accordance with claim 1. [0025] In addition, a mobile station apparátus according to the present invention is directed to a mobile station apparátus in accordance with claim 3.

[0026] In addition, a communication method ofa mobile station apparátus in a mobile communication system is directed to a communication method in accordance with claim 5.

[0027] According to the present invention, as the base station apparátus transmits, to the mobile station apparátus, control Information fór specifying a transmission formát fór the mobile station apparátus to simultaneously transmit the uplink data and the reception quality Information, and the mobile station apparátus simultaneously transmits, to the base station apparátus, the uplink data and the reception quality Information based on the specified transmission formát in case of having received the control Information from the base station apparátus, transmission of control signals fór specifying the mapping of respective Information can be omitted, and the downlink resources can be effectively utilized. Additionally, as the transmission formát is specified based on the way of allocating uplink resources, the mapping ofthe uplink data and the reception quality Information can be changed, and the transmission of control signals fór changing the mapping of respective Information can be omitted. As a result, the delay occurring in changing the mapping of respective Information can be reduced.

Brief Description ofthe Drawings [0028]

Fig. 1 illustrates a block diagram showing a schematic configuration ofa base station apparátus according to a first embodiment of the invention.

Fig. 2 illustrates a block diagram showing a schematic configuration ofa mobile station apparátus according to the first embodiment of the invention.

Fig. 3 illustrates an exemplary mapping of Information according to the first embodiment of the invention.

Fig. 4 illustrates an exemplary mapping of Information according to the first embodiment of the invention.

Fig. 5 illustrates an exemplary mapping of Information according to the first embodiment of the invention.

Fig. 6 illustrates an exemplary mapping of Information according to the first embodiment of the invention.

Fig. 7 illustrates an exemplary mapping of Information according to the first embodiment of the invention.

Fig. 8 illustrates an exemplary mapping of Information according to the first embodiment of the invention.

Fig. 9 illustrates a sequence chart ofthe operations of a base station apparátus and a mobile station apparátus according to the first embodiment ofthe invention.

Fig. 10 illustrates the content of a predefined table used fór a mobile communication system according to a second embodiment of the invention.

Fig. 11 illustrates a sequence chart of the operations of a base station apparátus and a mobile station apparátus according to the second embodiment of the invention.

Fig. 12 is a diagram illustrating a third embodiment of the invention.

Fig. 13 illustrates the content of a predefined table according to the third embodiment of the invention.

Fig. 14 is a diagram illustrating a communication method between a base station apparátus and a mobile station apparátus ofthe prior art.

ΕΡ 2 187 666 Β1

Description ofthe Reference Numerals [0029]

100: base station apparátus

101: data control unit

102: modulation encoding unit

103: mapping unit

104: IFFTunit

105: rádió transmitting unit

106: rádió receiving unit

107: FFTunit

108: demodulation decoding unit

109: data extraction unit

110: scheduler unit

111: transmission Information control unit

111a: modulation and coding control unit

111b: frequency selective scheduler unit

112: antenna

200: mobile station apparátus

201: data control unit

202: modulation encoding unit

203: mapping unit

204: IFFT unit

205: rádió transmitting unit

206: rádió receiving unit

207: FFT unit

208: demodulation decoding unit

209: data extraction unit

210: reception quality Information control unit

210a: reception quality Information generating unit

210b: reception quality measuring unit

211: antenna

Best Modes fór Carrying Out the Invention [0030] Now, various embodiments of the invention will be described with reference to the diagrams.

FIRST EMBODIMENT [0031] First, a mobile communication system according to a first embodiment ofthe invention will be described. The mobile communication system eomprises a base station apparátus and a mobile station apparátus. Fig. 1 illustrates a block diagram showing a schematic configuration ofthe base station apparátus according to the first embodiment ofthe invention. The base station apparátus 100 includes a data control unit 101, a modulation encoding unit 102, a mapping unit 103, an inverse fást Fouriertransformation (IFFT) unit 104, a rádió transmitting unit 105, a rádió receiving unit 106, a fást Fourier transformation (FFT) unit 107, a demodulation decoding unit 108, a data extraction unit 109, a scheduler unit 110, a transmission Information control unit 111, and an antenna 112. The transmission Information control unit 111 includes a modulation encoding control unit 111a and a frequency selective scheduler unit 111b.

[0032] Transmission data to be transmitted to each mobile station apparatuses and control data are input to data control unit 101 in the base station apparátus 100, and each data is transmitted sequentially to the mobile station apparatuses following instructions of the scheduler unit 110. The modulation encoding unit 102 applies modulation and error-correcting coding to signals input from the data control unit 101 based on modulation scheme and coding rate determined by the modulation encoding control unit 111a, and outputs each data to the mapping unit 103. The mapping unit 103 maps data input from the modulation encoding unit 102 onto each sub-carrier based on frequency selective scheduling Information províded by the frequency selective scheduler unit 111b, and outputs each of the data to the IFFT unit 104.

[0033] The IFFT unit 104 applies inverse fást Fourier transformation to data input from the mapping unit 103, then converts the input data intő temporal baseband digital signals, and finally outputs the signals intő the rádió transmitting

ΕΡ 2 187 666 Β1 unit 105. In the rádió transmitting unit 105, digital/analog conversion is applied to the output signals from the IFFT unit 104, and the resultant signals are then up-converted to a frequency appropriate fór transmission and transmitted to each mobile station apparatuses via the antenna 112.

[0034] The scheduler unit 110 performs scheduling fór both the downlink and the uplink based on control Information, such as resource regions available to each mobile station apparatuses, intermittent transmitting/receiving cycles, a formatof a transmission data channel and bufferstatus. The modulation encoding control unit 111 a determines modulation scheme and coding rate to be applied to each data based on the reception quality Information transmitted from the mobile station apparátus and outputs them to the modulation encoding unit 102. The frequency selective scheduler unit 111b applies frequency selective scheduling to each data based on the reception quality Information transmitted from the mobile station apparátus and outputs the resultto the mapping unit 103.

[0035] Fig. 2 illustrates a block diagram showing a schematic configuration of the mobile station apparátus according to the first embodiment of the invention. A mobile station apparátus 200 includes a data control unit 201, a modulation encoding unit 202, a mapping unit 203, an inverse fást Fourier transformation (IFFT) unit 204, a rádió transmitting unit 205, a rádió receiving unit 206, áfást Fourier transformation (FFT) unit 207, a demodulation decoding unit 208, a data extraction unit 209, a reception quality Information control unit 210, and an antenna 211. The reception quality Information control unit 210 includes a reception quality Information generating unit 210a and a reception quality measuring unit 210b. Note here that a receiving unit is composed of the rádió receiving unit 206, the FFT unit 207, the demodulation decoding unit 208, the data extraction unit 209, and the reception quality Information control unit 210, while a transmitting unit is composed of the data control unit 201, the modulation encoding unit 202, the mapping unit 203, the inverse fást Fourier transformation (IFFT) unit 204, and the rádió transmitting unit 205.

[0036] Transmission data to be transmitted to the base station apparátus and control data are input to the data control unit 201 in the mobile station apparátus 200, and those data are transmitted sequentially to the base station apparátus. The modulation encoding unit 202 applies modulation and error-correcting coding to signals input from the data control unit 201, and outputs each data to the mapping unit 203. The mapping unit 203 maps data input from the modulation encoding unit 202 onto each sub-carrier, and outputs each of the data to the IFFT unit 204.

[0037] The IFFT unit 204 applies inverse fást Fourier transformation to a sequence of symbols input from the mapping unit 203, converts them intő temporal baseband digital signals, and outputs them to the rádió transmitting unit 205. In the rádió transmitting unit 205, digital/analog conversion is applied to the output signals from the IFFT unit 124, and the resultant signals are up-converted to a frequency appropriate fór transmission and then transmitted to the base station apparátus via the antenna 211.

[0038] The reception quality measuring unit 210b of the reception quality Information control unit 210 measures reception quality of signals received from the base station apparátus. The reception quality Information generating unit 210a generates reception quality Information to be transmitted to the base station apparátus based on the Information measured by the reception quality measuring unit 210b.

[0039] The receiving unit composed of the rádió receiving unit 206, the FFT unit 207, the demodulation decoding unit 208, the data extraction unit 209, and the reception quality Information control unit 210, receives control Information fór specifying a transmission formát of Information to be transmitted using the uplink from the base station apparátus, and based on the specified formát, recognizes a transmission formát fór transmitting the uplink data and the reception quality Information, as well as the uplink data and the ACK/NACK.

[0040] The transmitting unit composed of the data control unit 201, the modulation encoding unit 202, the mapping unit 203, the IFFT unit 204, and the rádió transmitting unit 205, simultaneously transmits, to the base station apparátus, the uplink data and the reception quality Information, as well as the uplink data and the ACK/NACK in the transmission formát recognized by the receiving unit.

[0041] Fig. 3 illustrates an exempiary mapping of uplink data and reception quality Information transmitted from the mobile station apparátus to the base station apparátus according to thefirst embodiment of the invention. Fig. 3 illustrates form 1 and form 2. Fór each form, the vertical direction represents a time axis, and here includes fourteen OFDM symbols as an example of resources allocated by the base station apparátus. A plurality of known reference symbols (pilot signals, hereinafterreferred to as RS) used fór propagation path estimation todemodulatedata, different numberof the reception quality Information and the uplink data between the form 1 and the form 2 are mapped onto these fourteen OFDM symbols. [0042] On the other hand, the horizontal direction represents a frequency axis. Assuming a resource unit of the PUSCH (the minimum unit of a time-frequency block of the PUSCH) as one resource block, the base station apparátus allocates resources of one resource block in the form 1 and that of two resource blocks in the form 2, in the frequency axis direction. [0043] The mobile station apparátus transmits data by using the PUSCH according to resource allocation specified by a downlink control channel (Physical Downlink Control Channel, which will be referred to as PDCCH hereinafter) from the base station apparátus. In other words, this downlink control channel (PDCCH) is a signal fór permitting data transmission in the uplink (i.e., L1/L2 grant).

[0044] In the embodiment, the mobile station apparátus performs the mapping of Information in simultaneously transmitting the uplink data and the reception quality Information according to resources allocated by the base station apparátus

ΕΡ 2 187 666 Β1 using the L1/L2 grant.

[0045] More particularly, the form 1 of Fig. 3 illustrates that the mobile station apparátus is allocated, by using the L1/L2 grant from the base station apparátus, resources having the amount of fourteen OFDM symbols in the time axis direction and one resource block in the frequency axis direction, and performs the mapping ofthe uplink data and the reception quality information associated with the allocated resources. Here, an element composed of one OFDM Symbol and one sub-carrier is referred to as resource element. In this example, if one resource block composed of twelve subcarriers, the number of resource element fór one OFDM Symbol and one resource block is twelve, and the number of resource element in one resource block is 168.

[0046] Similarly, the form 2 of Fig. 3 illustrates that the mobile station apparátus is allocated, by using the L1/L2 grant from the base station apparátus, resources having the amount of fourteen OFDM symbols in the time axis direction and two resource blocks in the frequency axis direction, and performs the mapping of the uplink data and the reception quality information associated with the allocated resources.

[0047] Here, it can be predetermined what type of resources the base station apparátus allocates by using the L1/L2 grant and accordingly how the mobile station apparátus maps the uplink data and the reception quality information. That is, according to the embodiment, it is predetermined in case that the base station apparátus allocates resources having the amount of fourteen OFDM symbols in the time axis direction and one resource block in the frequency axis direction, the mobile station apparátus performs the mapping of the uplink data and the reception quality information represented by the form 1. Similarly, it is alsó predetermined that in case that the base station apparátus allocates resources having the amount of fourteen OFDM symbols in the time axis direction and two resource blocks in the frequency axis direction, the mobile station apparátus performs the mapping of the uplink data and the reception quality information represented by the form 2.

[0048] Because, when allocating resources to the mobile station apparátus by using the L1/L2 grant, the base station apparátus knows in advance what kind of mapping (e.g., form 1 or form 2) of the uplink data and the reception quality information transmitted simultaneously, the base station apparátus can separate the uplinkdata and the reception quality information. Then, the base station apparátus can apply adaptive modulation and coding and/or frequency selective scheduling to the downlink data based on the extracted reception quality information.

[0049] Next, the form 1 and the form 2 illustrated above as an example of mapping ofthe uplinkdata and the reception quality information simultaneously transmitted from the mobile station apparátus to the base station apparátus will be described in more detail. The form 1 has more reception quality information in the time axis direction (including fourteen OFDM symbols herein). In this form, the reception quality information transmitted from the mobile station apparátus to the base station apparátus is mapped so as to be more tolerant against the temporal variation in a propagation path. On the other hand, the form 2 has more reception quality information in the frequency axis direction. In this form, the reception quality information transmitted from the mobile station apparátus to the base station apparátus is mapped so as to be more tolerant against the frequency variation in the propagation path.

[0050] Similarly, Fig. 4 illustrates anotherexemplary mapping ofthe uplinkdata and the reception quality information transmitted from a mobile station apparátus according to the first embodiment ofthe invention. On the left side ofthe figure is shown a form similar to the form 1 in Fig. 3. The form 3 of Fig. 4 illustrates that the reception quality information can be simply mapped in the lower (or higher) frequency fór the resources allocated by the base station apparátus. With this simple mapping, the base station apparátus can separate the uplink data and the reception quality information without any complicated processes.

[0051] Similarly, Fig. 5 illustrates another exemplary mapping ofthe uplinkdata and the reception quality information transmitted from a mobile station apparátus according to the first embodiment ofthe invention. On the left side ofthe figure is shown form 4 similar to the form 1 of Fig. 3. The form 4 is significantly different from the form 1 in that the reception quality information is mapped in the frequency axis direction in a distributed manner and that the uplink data is inserted intő the piacé where the reception quality information was. Each region fór the reception quality information is composed of one or more resource element groups. Alsó, as shown in the form 5 in Fig. 5, by mapping the reception quality information in the frequency axis direction in a distributed manner, the mapping more tolerant against the frequency variation in a propagation path can be achieved, while a resource of the same size as the form 4 still being used fór transmitting the reception quality information (although four resource element groups in the form 4 and two resource element groups in the form 5 are used fór one OFDM Symbol, the size ofthe forms is the same because the latterform uses two resource blocks in the frequency axis direction).

[0052] Furthermore, Figs. 6 to 8 illustrate exemplary mappings ofthe uplink data and the reception quality information transmitted from the mobile station apparátus according to the first embodiment of the invention. Those figures are significantly different from Figs. 3 to 5 in that in each form, the mapping of the uplink data and the reception quality information is illustrated with gradation pattern. Forms depicted on the left side of Figs. 6 to 8 are shown as form T associated with the form 1 illustrated in Fig. 3.

[0053] In Figs. 6 to 8, conceptually, the gradation patterns show that the uplinkdata and the reception quality information are mixedly mapped alsó in one resource element. More particularly, they are mixed prior to their mapping onto the

ΕΡ 2 187 666 Β1 resource element. In those figures, the black part and the white part of the gradation pattern indicate the reception quality Information and the uplink data, respectively. The uplink data and the reception quality Information are mixed before being mapped onto the resource element, and then mapped onto twelve resource elements, fór example. That is, conceptually, one resource element contains a part of the reception quality Information and a part of the uplink data. [0054] The form T in Fig. 6 illustrates the mapping of the uplink data and the reception quality information in case that one resource block is specified by the L1/L2 grant. In the form T, the uplink data and the receipt quality information are mixedly mapped in four OFDM symbols of the fourteen OFDM symbols. On the other hand, the form 6 in Fig. 6 illustrates the mapping of the uplink data and the reception quality information in case that two resource blocks are specified by the L1/L2 grant. In this form 6, in four OFDM symbols of the fourteen OFDM symbols, the uplink data and the reception quality information are mapped as mixedly transmitted resources, and are further mapped using two resource blocks in the frequency direction. The form 6 in Fig. 6 is the form that was mapped so that the information amount of the reception quality information can increase as the number of allocated resource blocks increases. Alsó, fór the form T and the form 6, the black part showing the reception quality information with gradation is depicted with the same density. This indicates that ratios of the uplink data and the reception quality information mixed in the form 1 and the form 6 are same.

[0055] The form T in Fig. 7 is similar to the form T illustrated in Fig. 6. Alsó, the form 7 illustrates, similar to the form 6 in Fig. 6, the mapping of the uplink data and the reception quality information in case that two resource blocks are specified by the L1/L2 grant. In this form 7, in two OFDM symbols of the fourteen OFDM symbols, the uplink data and the reception quality information are mixedly mapped as transmitted resources, and further are mapped using two resource blocks in the frequency direction. Therefore, the form 7 is the form that was mapped so that the information amount of the reception quality information can nőt increase as the number of allocated resource blocks increases. Alsó, fór the form T and the form 7, the black part showing the reception quality information with gradation is depicted with the same density, indicates that the ratios of the uplink data and the reception quality information mixed are same. [0056] The form T illustrated in Fig. 8 is similarto the form T illustrated in Fig. 6. The form T and form 8 are significantly different in that each of the black part in the gradation pattern indicating the reception quality information is depicted with different density. Fór example, the black part of the form 8 has lighter density. This implies that the ratios of the uplink data and the reception quality information mixed in the form T and the form 8 are different, and implies that the ratios of the uplink data and the reception quality information mixed before being mapped onto the resource element. In Fig. 8, it is shown the information amount of the overall reception quality information to be transmitted in the forrni’ and the form 8 is same.

[0057] Now, details will be described with reference to a more specific example. Fór the form 1’ of Fig. 8, assuming that the reception quality information with the amount of 4 and the uplink data with the amount of 6 are mixed in resource having one Symbol and one resource block, then fór the form 8, the reception quality information with the amount of 2 and the uplink data with the amount of 8 would be mixed in such resource. That is, the amount of the reception quality information included in resource of one Symbol and one resource block becomes smaller. However, compared to the form T, the form 8 has the double number of resource blocks in which the uplink data and the reception quality information are mixed fór transmission. That is, the reception quality information transmitted in whole form 1’ and that in whole form 7 have the same amount of information amount.

[0058] If the uplink data and the resource quality information such as illustrated in Figs. 6 to 8 are mixed before being mapped onto the resource element, and the base station apparátus receives information mapped in a distributed manner onto multiple resource elements, then the base station apparátus can be composed to be able to extract received information as one integrated information (the reception quality information, the uplink data) after receiving all of the distributed resource elements.

[0059] As described above, with the mapping conceptually illustrated in Figs. 6 to 8 in which the uplink data and the reception quality information are mixed before being mapped onto the resource element, the mobile station apparátus needs nőt determine where the resource element including the uplink data or the reception quality information should be mapped, and can efficiently perform tasks needed on mapping information onto the resource element. Such mixing of the uplink data and the reception quality information can be done by, fór example, inserting the reception quality information per modulation Symbol intő the piacé where the uplink data was, and by applying, fór example, discrete Fourier conversion to the information.

[0060] A mobile station apparátus can perform the mapping of the uplink data and the reception quality information as shown in Figs. 3 to 8 depending on resources allocated by the L1/L2 grant from the base station apparátus. To describe Figs. 6 to 8 in further detail, the mobile station apparátus can change the ratio of the uplink data and the reception quality information to be mixed, depending on resources allocated by the L1/L2 grant from the base station apparátus. In short, with reference to Fig. 8, the mobile station apparátus can change the density of the black part indicating the reception quality information depending on resources allocated by the L1/L2 grant from the base station apparátus. Note here that the mapping of information described above is exemplary only, and fór example, the mappings shown in Figs. 3 to 8 can be combined, and any mapping of the uplink data and the reception quality information to be simultaneously transmitted from the mobile station apparátus can be possible.

ΕΡ 2 187 666 Β1 [0061] The way of mapping the reception quality information on the resource element groups described above can be roughly divided intő two parts. The one is fór increasing the resource amount ofthe reception quality information in proportion to that of resources allocated fór the uplink data. Fór example, as in the forms 1,1’ and 6, in case that four resource element groups are mapped in one resource block as the reception quality information, if two resource blocks are allocated the reception quality information is transmitted in eight resource element groups. The other is fór changing the mapping so that the resource amount (the numberof resource elements) ofthe reception quality information can be always constant, depending on resource allocationforthe uplink data. An example ofthis mapping is any ofthe mappings ofform 2, 3, 5, 7 or 8. In this embodiment, modulation scheme and coding rate applied to the reception quality information are set to be constant.

[0062] Now, the former and latter mapping methods described above are defined as information-increasing type and information-keeping type, respectively. It will alsó be described how to control each type of mapping method. First, a control method fór the information-increasing type of mapping method in the base station apparátus will be described. When performing the information-increasing type of mapping, the base station apparátus can transmit, to a mobile station apparátus, a RRC signaling including information indicating the minimum amount and/or the maximum amount of resources in which the reception quality information can be mapped.

[0063] Note here that, fór example, the minimum amount of resources, in which the reception quality information can be mapped, can be set as the resource amount of the reception quality information (e.g., the number of modulation symbols, the number of resource elements, the information amount, etc.) that can be mapped in one resource block. That is, it is the maximum resource amount of the reception quality information that can be mapped in one resource block. Meanwhile, the maximum amount of resources, in which the reception quality information can be mapped, can be set as the maximum resource amount of the reception quality information (e.g., the number of modulation symbols, the number of resource elements, the information amount, etc.) that can be mapped in resource blocks allocated by the base station apparátus.

[0064] A mobile station apparátus continues to perform the mapping of the uplink data and the reception quality information with the information-increasing type (see the forms 1, T and 6) based on the number of resource blocks and/or the transport block size allocated by the L1/L2 grant before reaching the minimum amount of resources, in which the reception quality information can be mapped (the maximum amount ofthe reception quality information to be mapped in one resource block), set by the RRC signaling from the base station apparátus.

[0065] Additionally, in case that the resources calculated based on the L1/L2 grant in mapping the reception quality information exceed the maximum amount of resources, in which the reception quality information can be mapped, set by the RRC signaling from the base station apparátus, the mobile station apparátus maps the uplink data and the reception quality information, and so that the resource amount does nőt exceed the maximum amount of resources set by the base station apparátus, by decreasing the resource amount in the time direction fór mapping the reception quality information as shown in the form 7, or by decreasing the reduction rate ofthe uplink data to decrease the ratio of resource amount fór mapping the reception quality information as shown in the form 8.

[0066] Furthermore, in case that the resources calculated based on the L1/L2 grant in mapping the reception quality information fali below the minimum amount of resources, in which the reception quality information can be mapped, set by the RRC signaling from the base station apparátus, the mobile station apparátus maps the uplink data and the reception quality information, and so that the resource amount does nőt fali below the minimum amount set by the base station apparátus, by increasing the resource amount in the time direction fór mapping the reception quality information as shown in the form 7, or by increasing the reduction rate of the uplink data to increase the ratio of resource amount fór mapping the reception quality information as shown in the form 8.

[0067] In this way, the base station apparátus transmits the RRC signaling including information indicating the minimum amount and/or the maximum amount of resources in which the reception quality information can be mapped. Having received the signal, the mobile station apparátus changes the mapping of the uplink data and the reception quality information, and transmits them simultaneously. Hereby, even when the resources fór transmitting the reception quality information calculated based on the L1/L2 grant is larger (i.e., when the uplink data having larger information amount is transmitted), the transmission ofthe reception quality information with a certain amount or more (i.e. , the reception quality information having too large information amount) bythe mobile station apparátus can be avoided, and significant increase of overhead ofthe uplink caused by the transmission ofthe reception quality information can be avoided. Alsó, even when the resources fór transmitting the reception quality information calculated based on the L1/L2 grant is smaller (i.e., when the uplink data having smaller information amount is transmitted), the mobile station apparátus can transmit the reception quality information with a certain amount or more (the reception quality information set by the minimum amount), and the quality of the reception quality information can be maintained above a certain level. Moreover, by setting the minimum amount that can be calculated based on the L1/L2 grant as the minimum amount, the transmission ofthe reception quality information that falls below the minimum amount bythe mobile station apparátus can be avoided. Here, by defining an equation fór the resources fór transmitting the reception quality information nőt to exceed the maximum amount and nőt tofall below the minimum amount, each of which can be calculated based on the L1/L2 grant,

ΕΡ 2 187 666 Β1 the maximum amount or the minimum amount need nőt to be set by using the RRC signaling.

[0068] Subsequently, a control method fór the information-keeping typeof mapping method in a base station apparátus will be described. When the mobile station apparátus performs the information-keeping type of mapping, the base station apparátus can transmit, to the mobile station apparátus, the RRC signaling including information indicating a certain amount (keeping value, hereinafter) of resources in which the reception quality information can be mapped. Note here that the keeping amount of resources, in which the reception quality information can be mapped, can be defined as a certain resource amount (e.g., the number of modulation symbols, the number of resource elements, the information amount, etc.) ofthe reception quality information that can be mapped in resource blocks allocated by the base station. If the RRC signaling from the base station apparátus sets the keeping value to a size of 10, the mobile station apparátus maps the uplink data and the reception quality information having a size of 10 whatever number of resource blocks and/or transport block size are allocated by the L1/L2 grant.

[0069] Additionally, in casethatthe amountof resources calculated in mapping the reception quality information exceed the keeping amount of resources, in which the reception quality information can be mapped, set by the RRC signaling from the base station apparátus, the mobile station apparátus maps the uplink data and the reception quality information, and so that the resource amount does nőt exceed the keeping amount set by the base station apparátus, by decreasing the resource amount in the time direction fór mapping the reception quality information as shown in the form 7, or by decreasing the reduction rate ofthe uplinkdata to decrease the proportion of resource amountfor mapping the reception quality information as shown in the form 8.

[0070] Furthermore, in case that the amount of resources calculated in mapping the reception quality information fali below the keeping amount of resources, in which the reception quality information can be mapped, set by the RRC signaling from the base station apparátus, the mobile station apparátus maps the uplink data and the reception quality information, and so that the resource amount does nőt fali below the keeping amount set by the base station apparátus, by increasing the resource amount in the time direction fór mapping the reception quality information as shown in the form 7, or by increasing the reduction rate of the uplink data to increase the resource amount fór the reception quality information as shown in the form 8.

[0071] In this way, the base station apparátus transmits the RRC signaling including information (keeping value) indicating a certain amount of resources in which the reception quality information can be mapped. Having received the signal, the mobile station apparátus simultaneously transmits the uplink data and a certain amount of the reception quality information. Hereby, the mobile station apparátus can transmit a certain amount ofthe reception quality information without depending on resources allocated by the L1/L2 grant.

[0072] Fig. 9 illustrates a sequence chart of operations of a base station apparátus and a mobile station apparátus according to the first embodiment of the invention. First, the base station apparátus allocates resources fór the mobile station apparátus to transmit the uplink data by using the L1/L2 grant (step S61) . Here, it is assumed that the resources are allocated according to the form 1 in Fig. 3. Next, having received the L1/L2 grant from the base station apparátus, the mobile station apparátus simultaneously transmits the uplink data and the reception quality information with the information mapping (ofthe form 1, herein) associated with the allocated resources (step S62).

[0073] Next, the base station apparátus again allocates resources fór the mobile station apparátus to transmit the uplink data by using the L1/L2 grant (step S63). Here, it is assumed that the resources are allocated according to the form 2 in Fig. 3. Next, having received the L1/L2 grant from the base station apparátus, the mobile station apparátus simultaneously transmits the uplink data and the reception quality information with the information mapping (of the form 2, herein) associated with the allocated resources (step S64). Here, the mapping ofthe uplink data and the reception quality information associated with the resources allocated by the base station apparátus using the L1/L2 grant can be predetermined.

[0074] As described above, by predetermining the mapping of the uplink data and the reception quality information in accordance with the resource allocation ofthe uplink data from the base station apparátus, and by the mobile station apparátus performing the mapping ofthe uplinkdata and the reception quality information in accordance with the resource allocation of the uplink data from the base station apparátus, the transmission of control signals to specify the mapping of respective information is unnecessary. As a result, inefficient use ofthe downlink resources can be reduced. Additionally, since the information mapping in simultaneously transmitting the uplinkdata and the reception quality information is changed in accordance with the way of allocating the uplink resources, any control signals fór changing the mapping of respective information is nőt needed, and the delay in changing the mapping of respective information can be reduced. [0075] According to the first embodiment, the base station apparátus allocates resources fór the uplink data. However, since performing the mapping of the reception quality information simultaneously transmitted with the uplink data in accordance with this resource allocation, as a result, the base station apparátus allocates resources fór the uplink data and the reception quality information.

[0076] The first embodiment ofthe invention described above can be applied when the uplinkdata and the ACK/NACK are transmitted simultaneously. That is, by predetermining the mapping ofthe uplink data and the ACK/NACK in accordance with the resource allocation of the uplink data from the base station apparátus, and by the mobile station

ΕΡ 2 187 666 Β1 apparátus performing the mapping of the uplink data and the ACK/NACK in accordance with the resource allocation of the uplink data from the base station apparátus, control signals to specify the mapping of respective information (the uplink data and the ACK/NACK) are unnecessary. As a result, inefficient use ofthe downlink resources can be reduced. Additionally, since the information mapping in simultaneously transmitting the uplink data and the ACK/NACK is changed in accordance with the way of allocating the uplink resources, any control signals fór changing the mapping of respective information is nőt needed, and the delay in changing the mapping of respective information can be reduced.

SECOND EMBODIMENT [0077] According to a second embodiment, the mobile station apparátus determines modulation scheme and coding rate to be applied to the reception quality information simultaneously transmitted based on modulation scheme and coding rate applied to the uplink data allocated by the base station apparátus using the L1/L2 grant.

[0078] The base station apparátus allocates resources fór the uplink data by using the L1/L2 grant, and specifies the modulation scheme and the coding rate applied to the uplink data. Having received this signal, the mobile station apparátus determines the modulation scheme and the coding rate to be applied to the reception quality information based on those applied to the uplink data. Note here that the modulation scheme and the coding rate to be applied to the uplink data by the base station apparátus using the L1/L2 grant and those to be applied associated with the reception quality information by the mobile station apparátus can be predetermined.

[0079] Fig. 10 illustrates the content of a predefined table in a mobile communication system according to the second embodiment. As shown in Fig. 10, the modulation scheme and the coding rate to be applied to the uplink data by the base station apparátus are associated with those to be applied to the reception quality information. As shown in Fig. 10, it is predetermined in case that the base station apparátus specifies applying modulation scheme QPSK and coding rate 1/8 to the uplink data, then the mobile station apparátus applies modulation scheme QPSK or BPSK and coding rate 1/8 or 1/16 to the reception quality information fór transmission. In addition, fór example, it is predetermined in case that the base station apparátus specifies applying modulation scheme 16QAM and coding rate 1/4 to the uplink data, then the mobile station apparátus applies modulation scheme 16QAM or QPSK and coding rate 1/4 or 1/8 to the reception quality information fór transmission.

[0080] That is, fór example, by the base station apparátus specifying applying modulation scheme 16QAM and coding rate 1/4 to the uplink data, then the uplink data to which modulation scheme 16QAM and coding rate 1/4 are applied and the reception quality information to which modulation scheme 16QAM or QPSK and coding rate 1/4 or 1/8 are applied are simultaneously transmitted from the mobile station apparátus. Note here that the coding rate applied to the uplink data and the coding rate applied to the reception quality information can be calculated from the modulation scheme and the transport block size to be transmitted. That is, the modulation scheme and the transport blocks to be transmitted can be predefined.

[0081] This association between the modulation scheme and the coding rate of the uplink data and those of the reception quality information can be mapped in advance in one-to-one orone-to-many manner. Forone-to-many manner mapping, the blind decoding described below will be applied with multiple modulation schemes and coding rates associated with the modulation scheme and the coding rate ofthe uplink data on demodulating the reception quality information in the base station apparátus.

[0082] Generally, in case that high modulation scheme and high coding rate are used fór transmitting information, larger amount of information can be transmitted. On the other hand, in case that low modulation scheme and low coding rate are used, highly reliable information can be transmitted. As described above, by predetermining the modulation scheme and the coding rate applied to the reception quality information associated with those applied to the uplink data by the base station apparátus, the modulation scheme and the coding rate ofthe reception quality information simultaneously transmitted with the uplink data can comply with those of the uplink data, improving probability of successful transmission ofthe reception quality information.

[0083] When specifying the modulation scheme and the coding rate to be applied to the uplink data by using the L1/L2 grant fór the mobile station apparátus, the base station apparátus can decode respective information based on the modulation scheme and the coding rate ofthe reception quality information because the base station apparátus knows in advance the modulation scheme and the coding rate ofthe reception quality information simultaneously transmitted with the uplink data. Note here that in case that the association between the modulation scheme and the coding rate of the uplink data and those ofthe reception quality information is mapped in one-to-many manner, the decoding will be attempted fór all possible modulation schemes and coding rates (blind decoding), and then the results will be checked by the cyclic redundancy check (CRC) fór correct modulation. The base station apparátus applies adaptive modulation and coding and/or frequency selective scheduling to the downlink data base on the correctly demodulated reception quality information.

[0084] Fig. 11 illustrates a sequence chart of operations of a base station apparátus and a mobile station apparátus according to the second embodiment ofthe invention. First, the base station apparátus specifies the modulation scheme

ΕΡ 2 187 666 Β1 and the coding rate applied to the uplink data by using L1/L2 grant (step S71,). Here, it is assumed that modulation scheme A and coding rate B are specified as the modulation scheme and the coding rate applied to the uplink data. Next, having received the L1/L2 grant from the base station apparátus applies, the mobile station apparátus applies modulation scheme and coding rate associated with the modulation scheme A and the coding rate B to the reception quality Information. Here, it is assumed that modulation scheme C and coding rate D are applied to the reception quality Information associated with the modulation scheme A and the coding rate B, respectively. Then, the mobile station apparátus simultaneously transmits, to the base station apparátus, the uplink data to which the modulation scheme A and the coding rate B are applied and the reception quality Information to which the modulation scheme C and the coding rate D are applied (step S72).

[0085] Next, the base station apparátus again specifies modulation scheme and coding rate applied to the uplink data by using the L1/L2 grant (step S73). Here, it is assumed that modulation scheme E and coding rate F are specified as the modulation scheme and the coding rate applied to the uplink data. Next, having received the L1/L2 grant from the base station apparátus, the mobile station apparátus applies modulation scheme and coding rate associated with the modulation scheme E and coding rate F to the reception quality Information. Here, it is assumed that modulation scheme G and coding rate H are applied to the reception quality Information associated with the modulation scheme E and coding rate F, respectively. Then, the mobile station apparátus simultaneously transmits, to the base station apparátus, the uplink data to which the modulation scheme E and the coding rate F are applied and the reception quality Information to which the modulation scheme G and the coding rate H are applied (step S74). Here, the modulation scheme and the coding rate of the reception quality Information associated with those applied to the uplink data by the base station apparátus using the L1/L2 grant are predetermined.

[0086] As described above, the modulation scheme and the coding rate of the reception quality Information simultaneously transmitted with the uplink data are predetermined in accordance with those applied to the uplink data specified by the base station apparátus, and the mobile station apparátus can apply the modulation scheme and the coding rate to the reception quality Information in accordance with the specification of the modulation scheme and the coding rate to be applied to the uplink data. As a result, the reception quality Information transmitted from the mobile station apparátus to the base station apparátus can comply with the modulation scheme and the coding rate of the uplink data, improving probability of successful transmission of the reception quality Information.

[0087] According to the second embodiment, the base station apparátus specifies the modulation scheme and the coding rate to be applied to the uplink data. However, as the modulation scheme and the coding rate of the reception quality Information simultaneously transmitted with the uplink data can alsó be specified accordingly, the base station apparátus specifies the modulation scheme and the coding rate of the uplink data and the reception quality Information as a result.

[0088] The second embodiment of the invention described above can be applied alsó when the uplink data and the ACK/NACK are simultaneously transmitted. That is, by predetermining the modulation scheme and the coding rate of the ACK/NACK simultaneously transmitted with the uplink data in accordance with the specification of those to be applied to the uplink data from the base station apparátus, and by the mobile station apparátus applying the modulation scheme and the coding rate to the ACK/NACK in accordance with the specification of those to be applied to the uplink data from the base station apparátus, the ACK/NACK transmitted from the mobile station apparátus to the base station apparátus can comply with the modulation scheme and the coding rate of the uplink data, improving probability of successful transmission of the reception quality Information.

THIRD EMBODIMENT [0089] In viewofthefirst and second embodiments described above, aspecificoperational example ofthe base station apparátus and the mobile station apparátus will be described as a third embodiment. Fig. 12 illustrates the L1/L2 grant transmitted from the base station apparátus to the mobile station apparátus, reception quality Information aperiodically transmitted, reception quality Information periodically transmitted, uplink data from the mobile station apparátus to the base station apparátus, and a transmission form for simultaneously transmitting the uplink data or the uplink data and the reception quality Information. A periodical transmission of the reception quality Information from the mobile station apparátus to the base station apparátus can be achieved, for example, by the base station apparátus transmitting the L1/L2 grant including one-bit Information, by the mobile station apparátus transmitting the reception quality Information to the base station apparátus after having received the signal,. Meanwhile, periodical transmission of the reception quality Information from the mobile station apparátus to the base station apparátus can be achieved, for example, by the base station apparátus transmitting the RRC signaling including Information setting periodicity for transmitting the reception quality Information from the base station apparátus to the mobile station apparátus, by the mobile station apparátus transmitting the reception quality Information with the set periodicity to the base station apparátus after having received the signal. Fig. 12 illustrates, as an example, operations ofthe slots 1 to 10. Alsó, on the right sídé of Fig. 12 is shown a Processing flow of each siót. In this figure, for clarity of Processing flows, only somé arrows are illustrated,

EP 2 187 666 Β1 that is, an arrow related to the siót 1 shows a Processing flow from the base station apparátus, and other arrows related to other slots show the Processing flowsfrom the mobile station apparátus, which will be described in detail below. [0090] Fig. 13 illustrates a predefined table of modulation scheme and coding rate utilized in the third embodiment. The mobile station apparátus, fór which modulation scheme and coding rate are specified fór the uplink data by the L1/L2 grant from the base station apparátus, applies modulation scheme and coding rate to the reception quality Information by using the table defined in Fig. 13. Fór example, if the base station apparátus specifies modulation scheme QPSK and coding rate 1/8 of the uplink data, then the mobile station apparátus applies modulation scheme BPSK and coding rate 1/4 to the reception quality Information.

[0091] Turning back to Fig. 12, operations of each siót will be described. A base station apparátus transmits the RRC signaling including the minimum amount and/or the maximum amount and the keeping amount of resources in which the reception quality Information can be mapped fór the mobile station apparátus to simultaneously transmit the uplink data and the reception quality Information. Fór clarity of explanation, the minimum value, the maximum value and the keeping value of Information amount, in which the reception quality Information can be mapped, are set to 10, 50, and 20 respectively. Here, those values are set only as an example, the minimum value and/or the maximum value and the keeping value of resources, in which the reception quality Information can be mapped, can be set, fór example, by using the number of modulation symbols, the number of resource elements fór mapping the reception quality Information, and the Information amount (the number of bits) of the reception quality Information, before mapping the reception quality Information onto the resource elements. In addition, in the siót 1, all ofthe minimum value and/or the maximum value and the keeping value are nőt necessarily be set.

[0092] The siót 2 is a siót which is set in advance by the base station apparátus to transmit the reception quality Information periodically. At the siót 2, by using the L1/L2 grant, the base station apparátus allocates resources used fór the mobile station apparátus to transmit the uplink data. Having received this signal, the mobile station apparátus simultaneously transmits the uplink data and the reception quality Information with the information-keeping type of mapping method by using the allocated resources.

[0093] Furthermore, the operation of the mobile station apparátus at the siót 2 will be described. At the siót 2, the mobile station apparátus transmits, to the base station apparátus, the uplink data and the reception quality Information with the information-keeping type of mapping method. The information-keeping type of mapping method is a mapping method to transmit a certain amount ofthe reception quality Information with the keeping amount set by the RRC signaling. [0094] Specifically, herein, the keeping value in which the reception quality Information can be mapped is set to 20 by the RRC signaling from the base station apparátus. In this case, by using the L1/L2 grant, the base station apparátus sets to use one resource block as resources, modulation scheme QPSK, and coding rate 1/8 fór transmitting the uplink data. Referring to the table shown in Fig. 13, this means modulation scheme and coding rate ofthe reception quality Information are set to BPSK and 1/16, respectively. With this control from the base station apparátus, the mobile station apparátus transmits, by using one resource block, the uplink data to which modulation scheme QPSK and coding rate 1/8 are applied, and the reception quality Information with a size of 20 to which modulation scheme BPSK and coding rate 1/16 are applied. Therefore, the amount of resources used fór this reception quality Information is 320 (i.e., 20* 1 * 16). [0095] Alsó, by using the L1/L2 grant, the base station apparátus sets to use two resource blocks as resources, modulation scheme QPSK, and coding rate 1/8 fór transmitting the uplink data. Referring to the table shown in Fig. 13, this means modulation scheme and coding rate ofthe reception quality Information are set to BPSK and 1/16, respectively. That is, with this control from the base station apparátus, the mobile station apparátus transmits, by using two resource blocks, the uplink data to which modulation scheme QPSK and coding rate 1/8 are applied, and the reception quality Information with a size of 20 to which modulation scheme BPSK and coding rate 1/16 are applied. Therefore, the amount of resources used fór this reception quality Information is 320 (i.e., 20 * 1 * 16).

[0096] Furthermore, by using the L1/L2 grant, the base station apparátus sets to use two resource blocks as resources, modulation scheme QPSK, and coding rate 1/4 fór transmitting the uplink data. Referring to the table shown in Fig. 13, this means modulation scheme and coding rate ofthe reception quality Information are setto BPSK and 1/8, respectively. That is, with this control from the base station apparátus, the mobile station apparátus transmits, by using two resource blocks, the uplink data to which modulation scheme QPSK and coding rate 1/4 are applied, and the reception quality Information with a size of 20 to which modulation scheme BPSK and coding rate 1/8 are applied. Therefore, the amount of resources used fór transmitting this reception quality Information will be 160 (i.e., 20 * 1 * 8).

[0097] The siót 3 is a siót which is set by the base station apparátus to transmit the reception quality Information aperiodically. The siót is alsó set by controlling from the base station apparátus to transmit the reception quality Information in a triggered manner. At the siót 3, by using the L1/L2 grant, the base station apparátus allocates resources used fór the mobile station apparátus to transmit the uplink data. Having received this signal, the mobile station apparátus simultaneously transmits the uplink data and the reception quality Information with the information-increasing type of mapping method by using the allocated resources.

[0098] Furthermore, the operation of the mobile station apparátus at the siót 3 will be described. At the siót 3, the mobile station apparátus transmits, to the base station apparátus, the uplink data and the reception quality Information

ΕΡ 2 187 666 Β1 with the information-increasing type of mapping method. The information-increasing type of mapping method is a mapping method to transmit, in accordance with resources allocated by the L1/L2 grant from the base station apparátus, the reception quality information with the amount of resources fór mapping the reception quality information being increased in the rangé of the minimum value and/or the maximum value set by the RRC signaling.

[0099] Specifically, herein, the minimum value and the maximum value, in which the reception quality information can be mapped, are set to 10 and 250 respectively by the RRC signaling from the base station apparátus (herein, the minimum value and the maximum value are set with modulation scheme BPSK and coding rate 1/16). In this case, by using the L1/L2 grant, the base station apparátus sets to use one resource block as resources, modulation scheme QPSK, and coding rate 1/8 fortransmitting the uplink data. Referring to the table shown in Fig. 13, this means modulation scheme and coding rate of the reception quality information are set to BPSK and 1/16, respectively. With this control from the base station apparátus, the mobile station apparátus transmits, by using one resource block, the uplink data to which modulation scheme QPSK and coding rate 1/8 are applied, and the reception quality information with a size of 10 (10*1*1*(1/16)/(1/16)) to which modulation scheme BPSK and coding rate 1/16 are applied. Therefore, the amount of resources used fór this reception quality information is 160 (i.e., 10*1 * 16).

[0100] Alsó, by using the L1/L2 grant, the base station apparátus sets to use three resource blocks as resources fór transmitting uplink data, modulation scheme QPSK, and coding rate 1/8. Referring to the table shown in Fig. 13, this means modulation scheme and coding rate of the reception quality information are set to BPSK and 1/16, respectively. That is, with this control from the base station apparátus, the mobile station apparátus transmits, by using three resource blocks, the uplink data to which modulation scheme QPSK and coding rate 1/8 are applied, and the reception quality information with a size of 30 (10*3*1 *(1/16)/(1/16)) to which modulation scheme BPSK and coding rate 1/16 are applied. Therefore, the amount of resources used fór this reception quality information is 480 (i.e., 30 * 1 * 16).

[0101] Furthermore, by using the L1/L2 grant, the base station apparátus sets to use three resource blocks as resources, modulation scheme 16QAM, and coding rate 1/4 fortransmitting the uplink data. Referring to the table shown in Fig. 13, this means modulation scheme and the coding rate of the reception quality information are set to QPSK and 1/4, respectively. That is, with this control from the base station apparátus, the mobile station apparátus transmits, by using three resource blocks, the uplink data to which modulation scheme 16QAM and coding rate 1/4 are applied, and the reception quality information with a size of 240 (10*3*2*(1/9)/(1/16)) to which modulation scheme QPSK and coding rate 1/4 are applied. Therefore, the amount of resources used fór this reception quality information is 480 (i.e., 240 * (1/2) * 4). Herein, this mapping method is an increasing type of mapping method fór resource blocks, modulation scheme, and coding rate.

[0102] Alternatively, by using the L1/L2 grant, the base station apparátus sets to use three resource blocks as resources, modulation scheme 16QAM, and coding rate 1/4 fortransmitting the uplink data. Referring to the table shown in Fig. 13, this means modulation scheme and coding rate of the reception quality information are set to QPSK and 1/4, respectively. That is, with this control from the base station apparátus, the mobile station apparátus transmits, by using three resource blocks, the uplink data to which modulation scheme 16QAM and coding rate 1/4 are applied, and the reception quality information with a size of 30 (10*3*1*1) to which modulation scheme QPSK and coding rate 1/4 are applied. Therefore, the amount of resources used fór this reception quality information is 60 (i.e., 30 * (1/2) * 4). Herein, this mapping method is an increasing type of mapping method fór resource blocks, while a keeping type of mapping method fór modulation scheme, and coding rate.

[0103] Furthermore, by using the L1/L2 grant, the base station apparátus sets to use four resource blocks as resources, modulation scheme 16QAM, and coding rate 1/4 fortransmitting the uplink data. Referring to the table shown in Fig. 13, this means modulation scheme and coding rate of the reception quality information are set to QPSK and 1/4, respectively. That is, with this control from the base station apparátus, the mobile station apparátus transmits, by using four resource blocks, the uplink data to which modulation scheme 16QAM and coding rate 1/4 are applied, and the reception quality information with a size of 320 (10*4*2* (1/4) / (1/16)) to which modulation scheme QPSK and coding rate 1/4 are applied. However, as the maximum value of resources, in which the reception quality information can be mapped, is set to 250 by the RRC signaling from the base station apparátus, the mobile station apparátus transmits, to the base station apparátus, the reception quality information with a size of250. Therefore, the amount of resources used fór the reception quality information is 500 (i.e., 250*(1/2)*4).

[0104] At the siót 4 in Fig. 12, the base station apparátus transmits the normál L1/L2 grant. Having received the signal, the mobile station apparátus transmits, to the base station apparátus, the uplink data. Similar operation will be done at the siót 8.

[0105] Similar to the siót 2, the siót 7 is a siót which is set in advance by the base station apparátus to transmit the reception quality information periodically. At the siót 7, using the L1/L2 grant, the base station apparátus allocates resources used fór the mobile station apparátus to transmit the uplink data. Having received this signal, the mobile station apparátus simultaneously transmits the uplink data and the reception quality information with the informationkeeping type of mapping method by using the allocated resources. The information-keeping type of mapping method is similar to that of the siót 2.

ΕΡ 2 187 666 Β1 [0106] Similar to the siót 3, the siót 10 is a siót which is set by the base station apparátus to transmit the reception quality information aperiodically. The siót is alsó set by controlling from the base station apparátus to transmit the reception quality information in a triggered manner. Atthe siót 10, by using the L1/L2 grant, the base station apparátus allocates resources used fór a mobile station apparátus to transmit the uplink data. Having received this signal, the mobile station apparátus simultaneously transmits the uplink data and the reception quality information with the information-increasing type of mapping method by using the allocated resources. The information-increasing type of mapping method is similar to that of the siót 3.

[0107] As fór the information-keeping type of mapping method performed in theslots 2 and 7, as well as the informationincreasing type and information-keeping type of mapping method performed in the slots 3 and 10, the information amount used fór the reception quality information and the number of modulation symbols used fór the uplink data, fór example, can be calculated as shown in the equations below. Let Nrb, Md, and Cd be the number of resource blocks, a Symbol rate fór modulation scheme, and a coding rate, respectively, allocated by the L1/L2 grant fór transmitting the uplink data. Additionally, let Mc and CC be a Symbol rate fór modulation scheme and coding rate ofthe reception quality information, respectively, set with a predefined table such as shown in Fig. 13. Further, let MaxR, MinR (in the case of using a Symbol rate Mo and coding rate Co), and ConR be the maximum value, the minimum value and the keeping value of the information amount, respectively, in which the reception quality information can be mapped, are set by the RRC signaling from the base station apparátus. Herein, the minimum value, the maximum value and the keeping value of resources, in which the reception quality information can be mapped, are set as the information amount ofthe reception quality information, fór example, the resources can be set with the number of modulation symbols, or the number of resource elements fór mapping the reception quality information before the reception quality information being mapped onto the resource elements.

[0108] First, the information-increasing type of mapping method can be defined with thefollowing equation. The Symbol rate Mc fór modulation scheme and the coding rate Cc of the reception quality information can be defined as a function of the Symbol rate Md and the coding rate Cd fór the uplink data, and predefined with a table based on the specification and so on such as shown in Fig. 13:

(Mc, Cc) = f (Md, Cd) [0109] Therefore, the number of modulation symbols Ncs used fór the reception quality information from the mobile station apparátus can be represented using the Mc and the Cc as follows:

Ncs = Be * Mc * 1 / Cc * a [0110] Here, as the information-increasing type of mapping method is a mapping method to transmit the reception quality information with the information amount ofthe reception quality information being increased in the rangé ofthe minimum value and/or the maximum value, which are set by the RRC signaling from the base station apparátus, the Be can be defined as follows:

BC = MAXMIN (MaxR, MinR * Nrb * Mc * 1 / Cc * 1 / Mo * Co,

MinR) [0111] That is, the number of modulation symbols Nds used fór the uplink data can be represented as follows:

Nds = Nrb * 168 - Ncs - γ [0112] Where α, β, γ are coefficients and vary with other factors, such as the number of reference symbols included in resource blocks, orthe spreading ratios applied to information, etc.

[0113] Subsequently, the information-keeping type of mapping method can be defined with the following equation. The Symbol rate Mc fór modulation scheme and the coding rate Cc of the reception quality information can be defined as a function ofthe Symbol rate Md and the coding rate Cd fór the uplink data and predefined with a table such as shown in Fig. 13:

EP 2 187 666 Β1 (Mc, Cc) = f (Md, Cd) [0114] Therefore, the number of modulation symbols Ncs used fór the reception quality information from the mobile station apparátus can be represented using Mc and Cc as follows:

Ncs = ConR ★ Mc * 1 / Cc * β [0115] Here, as the information-keeping type of mapping method is a mapping method to transmit the reception quality information with a certain information amount of the reception quality information by the keeping value, which is set by the RRC signaling from the base station apparátus, the Be can be defined as follows:

BC = ConR [0116] That is, the number of modulation symbols Nds used fór the uplink data can be represented as follows:

Nds = Nrb * 168 - Ncs - γ where a, β, γ are coefficients and vary with other factors, such as the number of reference symbols included in resource blocks, orthe spreading ratios applied to information, etc.

[0117] In this way, the base station apparátus transmits the RRC signaling including information indicating the minimum amount and/or the maximum amount of resources in which the reception quality information can be mapped. Having received the signal, the mobile station apparátus changes the mapping of the uplink data and the reception quality information, and simultaneously transmits them. Hereby, even when the resources fór transmitting the reception quality information calculated based on the L1/L2 grant is larger (i.e., when the uplink data having larger information amount is transmitted), the transmission of the reception quality information with a certain amount or more (i.e., the reception quality information having too large information amount) by the mobile station apparátus can be avoided, and significant increase of overhead ofthe uplink caused by the transmission ofthe reception quality information can be avoided. Alsó, even when the resources fór transmitting the reception quality information calculated based on the L1/L2 grant is smaller (i.e., when the uplink data having smaller information amount is transmitted), the mobile station apparátus can transmit the reception quality information with a certain amount or more (the reception quality information set by the minimum amount), and the quality of the reception quality information can be maintained above a certain level. Moreover, by setting the minimum amount that can be calculated based on the L1/L2 grant as the minimum amount, the transmission ofthe reception quality information that falls below the minimum amount by the mobile station apparátus can be avoided. Here, by defining an equation fór the resources fór transmitting the reception quality information nőt to exceed the maximum amount and nőt tofall below the minimum amount, each of which can be calculated based on the L1/L2 grant, the maximum amount or the minimum amount need nőt to be set by using the RRC signaling.

[0118] Alsó, the base station apparátus transmits the RRC signaling including information indicating the keeping value of resources in which the reception quality information can be mapped. Having received the signal, the mobile station apparátus simultaneously transmits the uplink data and a certain amount ofthe reception quality information. Hereby, the mobile station apparátus can transmit a certain amount ofthe reception quality information without depending on resources allocated by the L1/L2 grant.

[0119] Alsó, by the mobile station apparátus applying the information-keeping type of mapping method in transmitting the uplink data and periodic reception quality information, a certain amount ofthe reception quality information can be periodically transmitted to the base station apparátus. Meanwhile, by the mobile station apparátus applying the information-increasing type of mapping method in transmitting the uplink data and aperiodic reception quality information, the reception quality information comply with resources allocated by the L1/L2 grant can be transmitted to the base station apparátus.

[0120] According to the first and second embodiments ofthe invention described above, the base station apparátus can transmit control information fór specifying a transmission formát (resource information (mapping onto resource element) and/or modulation scheme and/or coding rate) of information (uplink data and/or reception quality information and/or HARQ ACK/NACK) transmitted in the uplink, while the mobile station apparátus can transmit, to the base station apparátus, information in the uplink based on the transmission formát specified by the base station apparátus.

[0121] As described above, the mobile station apparátus according to the embodiments isdirected to the mobile station

EP 2 187 666 Β1 apparátus in the mobile communication system where the mobile station apparátus transmits, to the base station apparátus, the reception quality Information indicating quality of signals received from the base station apparátus, wherein the mobile station apparátus calculates, from Information amount of the reception quality Information and modulation scheme and coding rate of the uplink data, number of symbols fór the reception quality Information, and transmits, to the base station apparátus, the reception quality Information with the calculated number of symbols together with the uplink data.

[0122] In addition, in the mobile station apparátus ofthe embodiment, the reception quality Information is mapped to a lower frequency fór resources allocated by the base station apparátus.

[0123] In addition, the mobile station apparátus according to the embodiments is directed to the mobile station apparátus in the mobile communication system where the mobile station apparátus transmits, to a base station apparátus, the ACK/NACK ofthe HARQ fór downlink data, wherein the mobile station apparátus calculates, from Information amount of the ACK/NACK and modulation scheme and coding rate of the uplink data, number of symbols fór the ACK/NACK, and transmits, to the base station apparátus, the ACK/NACK with the calculated number of symbols together with the uplink data.

[0124] In addition, the mobile station apparátus according to the embodiment is directed to the mobile station apparátus in the mobile communication system where the mobile station apparátus transmits, to a base station apparátus, the reception quality Information indicating quality of signals received from the base station apparátus, wherein the mobile station apparátus keeps Information amountforthe reception quality Information constant without depending on resources allocated by the base station apparátus, calculates number of symbols fór the reception quality Information according to control Information fór the uplink data specified by the base station apparátus, and transmits, to the base station apparátus, the reception quality Information with the calculated number of symbols together with the uplink data. [0125] In addition, the mobile station apparátus according to the embodiment is directed to the mobile station apparátus in the mobile communication system where the mobile station apparátus transmits, to the base station apparátus, the ACK/NACK of the HARQ fór downlink data, wherein the mobile station apparátus keeps Information amount fór the ACK/NACK constant without depending on resources allocated by the base station apparátus, calculates number of symbols fór the ACK/NACK according to control Information fór the uplink data specified by the base station apparátus, and transmits, to the base station apparátus, the ACK/NACK with the calculated number of symbols together with the uplink data.

[0126] In addition, the mobile communication system according to the embodiment is directed to the mobile communication system where the mobile station apparátus measures the reception quality of signals received from the base station apparátus, and transmits, to the base station apparátus, the reception quality Information, while the base station apparátus allocates, to the mobile station apparátus, resources based on the reception quality Information received from the mobile station apparátus, wherein the base station apparátus transmits, to the mobile station apparátus, control Information fór specifying a transmission formát fór the mobile station apparátus to transmit Information by using the uplink, the mobile station apparátus transmits, to the base station apparátus, the uplink data and the reception quality Information together based on the specified transmission formát in case of having received the control Information from the base station apparátus.

[0127] In addition, in the mobile communication system ofthe embodiment, the transmission formát of Information to be transmitted by using the uplink is that of the uplink data.

[0128] In this way, as the base station apparátus transmits, to the mobile station apparátus, control Information fór specifying a transmission formát fór the mobile station apparátus to transmit Information by using the uplink, and the mobile station apparátus transmits, to the base station apparátus, the uplink data and the reception quality Information together based on the specified transmission formát in case of having received the control Information from the base station apparátus, the transmission of any control signals fór specifying the mapping of respective Information can be omitted, and the downlink resources can be effectively utilized. Additionally, as the transmission formát is specified based on the way of allocating uplink resources, the mapping ofthe uplink data and the reception quality Information can be changed, and the transmission of control signals fór changing the mapping of respective Information can be omitted. As a result, any delay occurring in changing the mapping of respective Information can be reduced.

[0129] In addition, in the mobile communication system ofthe embodiment, the base station apparátus transmits, to the mobile station apparátus, as the control Information, resource Information specified by frequency component and time component, and the mobile station apparátus transmits, to the base station apparátus, the uplink data and the reception quality Information together in a transmission formát based on mapping ofthe uplink data and the reception quality Information, which is associated with the resource Information received from the base station apparátus.

[0130] In this way, by transmitting resource Information specified by frequency component and time component to the mobile station apparátus, the transmission formát fór the mobile station apparátus to transmit, to the base station apparátus, the uplink data and the reception quality Information together can specified. Hereby, the transmission of any control signals fór specifying the mapping of respective Information can be omitted, and the downlink resources can be effectively utilized.

ΕΡ 2 187 666 Β1 [0131] In addition, in the mobile communication system ofthe embodiment, the base station apparátus transmits, to the mobile station apparátus, as the control information, information fór specifying modulation scheme and coding rate ofthe uplinkdata, and the mobile station apparátus identifies modulation scheme and coding rate ofthe reception quality information, which are associated with the information fór specifying modulation scheme and coding rate of the uplink data received from the base station apparátus, and transmits, to the base station apparátus, the uplink data to which the modulation scheme and the coding rate ofthe information fór specifying modulation scheme and coding rate received from the base station apparátus are applied, together with the reception quality information to which the identified modulation scheme and coding rate are applied.

[0132] In this way, the base station apparátus transmits, to the mobile station apparátus, as the control information, information fór specifying modulation scheme and coding rate of the uplink data, while the mobile station apparátus identifies modulation scheme and coding rate ofthe reception quality information, which are associated with the information fór specifying modulation scheme and coding rate ofthe uplink data received from the base station apparátus, and transmits, to the base station apparátus, the uplink data to which the modulation scheme and the coding rate of the information fór specifying modulation scheme and coding rate received from the base station apparátus are applied, together with the reception quality information to which the identified modulation scheme and coding rate are applied. Thereby, the reception quality information transmitted from the mobile station apparátus to the base station apparátus can comply with the modulation scheme and the coding rate of the uplink data, improving probability of successful transmission ofthe reception quality information.

[0133] In addition, the mobile communication system according to the embodiment is directed to the mobile communication system where the base station apparátus allocates, to a mobile station apparátus, resources wherein the base station apparátus transmits, to the mobile station apparátus, control information fór specifying a transmission formát fór the mobile station apparátus to transmit information by using the uplink, and the mobile station apparátus transmits, to the base station apparátus, the uplink data and the ACK/NACK together based on the specified transmission formát in case of having received the control information from the base station apparátus.

[0134] In addition, in the mobile communication system ofthe embodiment, the transmission formát of information to be transmitted by using the uplink is that of the uplink data.

[0135] In this way, as a base station apparátus transmits, to a mobile station apparátus, control information fór specifying a transmission formatfor the mobile station apparátus to transmit information, and the mobile station apparátus transmits, to the base station apparátus, the uplink data and the ACK/NACK together based on the specified transmission formát in case of having received the control information from the base station apparátus, the transmission of any control signals fór specifying the mapping of respective information can be omitted, and the downlink resources can be effectively utilized. Additionally, as the transmission formát is specified based on the way of allocating uplink resources, the mapping ofthe uplinkdata and the ACK/NACK can be changed, and the transmission of control signals fór changing the mapping of respective information can be omitted. As a result, any delay occurring in changing the mapping of respective information can be reduced.

[0136] In addition, in the mobile communication system ofthe embodiment, the base station apparátus transmits, to the mobile station apparátus, as the control information, resource information specified by frequency component and time component, and the mobile station apparátus transmits, to the base station apparátus, the uplink data and the ACK/NACK together in a transmission formát based on mapping ofthe uplinkdata and the ACK/NACK, which is associated with the resource information received from the base station apparátus.

[0137] In this way, by transmitting resource information specified from frequency component and time component to the mobile station apparátus, the transmission formát fór the mobile station apparátus to transmit, to the base station apparátus, the uplinkdata and the ACK/NACK together can be specified. Hereby, the transmission of any control signals fór specifying the mapping of respective information can be omitted, and the downlink resources can be effectively utilized. [0138] In addition, in the mobile communication system ofthe embodiment, the base station apparátus transmits, to the mobile station apparátus, as the control information, information fór specifying modulation scheme and coding rate ofthe uplink data, and the mobile station apparátus identifies modulation scheme and coding rate ofthe ACK/NACK, which are associated with the information fór specifying modulation scheme and coding rate of the uplink data received from the base station apparátus, and transmits, to the base station apparátus, the uplink data to which the modulation scheme and the coding rate ofthe information fór specifying modulation scheme and coding rate received from the base station apparátus are applied, together with the ACK/NACK to which the identified modulation scheme and coding rate are applied.

[0139] In this way, the base station apparátus transmits, to the mobile station apparátus, as the control information, information fór specifying modulation scheme and coding rate of the uplink data, and the mobile station apparátus identifies modulation scheme and coding rate ofthe ACK/NACK, which are associated with the information fór specifying modulation scheme and coding rate ofthe uplink data received from the base station apparátus, and transmits, to the base station apparátus, the uplink data to which the modulation scheme and the coding rate received from the base station apparátus are applied, together with the ACK/NACK to which the identified modulation scheme and coding rate

EP 2 187 666 Β1 are applied. Hereby, the ACK/NACK transmitted from the mobile station apparátus to the base station apparátus can comply with the modulation scheme and the coding rate ofthe uplinkdata, improving probability of successful transmission of the ACK/NACK.

[0140] In addition, the base station apparátus according to the embodiment is directed to the base station apparátus allocates, to a mobile station apparátus, resources, and comprising: a scheduler unit fór performing scheduling of, fór a mobile station apparátus, including includes control information fór specifying a transmission formát to transmit the uplinkdata and the reception quality information together in a transmission signal, and a transmitting unit fór transmitting, to the mobile station apparátus, the transmission signal including the control information.

[0141] In this way, as the control information fór specifying a transmission formát fór the mobile station apparátus to transmit the uplink data and the reception quality information together is transmitted to the mobile station apparátus, the transmission of any control signals fór specifying the mapping of respective information can be omitted, and the downlink resources can be effectively utilized.

[0142] In addition, in the base station apparátus ofthe embodiment, the scheduler unit performs scheduling of including, as the control information, resource information specified by frequency component and time component in the transmission signal.

[0143] In this way, as the transmission of resource information specified by frequency component and time component to the mobile station apparátus, the transmission formát fór the mobile station apparátus to simultaneously transmit, to the base station apparátus, the uplinkdata and the reception quality information can be specified. Hereby, the transmission of any control signals fór specifying the mapping of respective information can be omitted, and the downlink resources can be effectively utilized.

[0144] In addition, in the base station apparátus ofthe embodiment, the scheduler unit performs scheduling of including, as the control information, information fór specifying modulation scheme and coding rate of uplinkdata in the transmission signal.

[0145] In this way, as information fór specifying modulation scheme and coding rate ofthe uplink data is transmitted to the mobile station apparátus as the control information, the mobile station apparátus can identify modulation scheme and coding rate ofthe reception quality information, which are associated with the information, and transmit, to the base station apparátus, the uplink data to which the modulation scheme and the coding rate of the information are applied, together with the reception quality information to which the identified modulation scheme and coding rate are applied. Hereby, the reception quality information transmitted from the mobile station apparátus to the base station apparátus can comply with the modulation scheme and the coding rate of the uplink data, improving probability of successful transmission ofthe reception quality information.

[0146] In addition, the base station apparátus according the embodiment is directed to the base station allocates, to a mobile station apparátus, resources, and comprising: a scheduler unit fór performing scheduling of, fór a mobile station apparátus, including control informationforspecifying a transmission formát to transmit the uplinkdataand the ACK/NACK together in a transmission signal, and a transmitting unitfortransmitting, to the mobile station apparátus, the transmission signal including the control signal.

[0147] In this way, as the control information fór specifying a transmission formát fór a mobile station apparátus to transmit the uplink data and the ACK/NACK together is transmitted to the mobile station apparátus, the transmission of any control signals fór specifying the mapping of respective information can be omitted, and the downlink resources can be effectively utilized.

[0148] In addition, in the base station apparátus ofthe embodiment, the scheduler unit performs scheduling of including as the control information, resource information specified by frequency component and time component in the transmission signal.

[0149] In this way, as the transmission of resource information specified from frequency component and time component to the mobile station apparátus, the transmission formát fór the mobile station apparátus to simultaneously transmit, to the base station apparátus, the uplink data and the ACK/NACK can be specified. Hereby, the transmission of any control signals fór specifying the mapping of respective information can be omitted, and the downlink resources can be effectively utilized.

[0150] In addition, in the base station apparátus ofthe embodiment, theschedulerunit performs scheduling of including, as the control information, informationforspecifying modulation scheme and coding rate of uplinkdata in the transmission signal.

[0151] In this way, as information fór specifying modulation scheme and coding rate ofthe uplink data is transmitted to the mobile station apparátus as control information, the mobile station apparátus can identify the modulation scheme and the coding rate of the ACK/NACK, which are associated with the information, and transmit, to the base station apparátus, the uplink data to which the modulation scheme and the coding rate of the information are applied, together with the ACK/NACK to which the identified modulation scheme and coding rate are applied. Hereby, the ACK/NACK transmitted from the mobile station apparátus to the base station apparátus can comply with the modulation scheme and the coding rate ofthe uplink data, improving probability of successful transmission ofthe ACK/NACK.

ΕΡ 2 187 666 Β1 [0152] In addition, the mobile station apparátus according to the embodiment is directed to the mobile station apparátus is allocated resources by a base station apparátus, and comprising: a receiving unit fór receiving, from the base station apparátus, control Information forspecifying a transmission formát of Information to be transmitted using the uplink, and a transmitting unit fór transmitting, to the base station apparátus, the uplink data and the reception quality Information together based on the specified transmission formát in case that the receiving unit has received the control Information from the base station apparátus.

[0153] In addition, in the mobile station apparátus of the embodiment, the transmission formát of Information to be transmitted using the uplink is that of the uplink data, and the receiving unit automatically recognizes the transmission formát of the reception quality Information from that of the uplink data.

[0154] In this way, as the mobile station apparátus transmits, to the base station apparátus, the uplink data and the reception quality Information together based on the specified transmission formát in case of having received the control Information from the base station apparátus, the base station apparátus can omit the transmission of any control signals forspecifying the mapping of respective Information, and the downlink resources can be effectively utilized. Additionally, as the transmission formát is specified based on the way of allocating uplink resources, the mapping of the uplink data and the reception quality Information can be changed, and the transmission of control signals fór changing the mapping of respective Information can be omitted. As a result, any delay occurring in changing the mapping of respective Information can be reduced.

[0155] In addition, in the mobile station apparátus of the embodiment, in case that the receiving unit has received, from the base station apparátus, resource Information specified by frequency component and time component as the control Information, the transmitting unit transmits, to the base station apparátus, the uplink data and the reception quality Information together in the transmission formát based on mapping of the uplink data and the reception quality Information, which is associated with the resource Information.

[0156] In this way, in case that resource Information specified byfrequency component and time component is received from the base station apparátus, the transmission formát fór transmitting the uplink data and the reception quality Information together to the base station apparátus can be specified. Hereby, the base station apparátus can omit the transmission of any control signals fór specifying the mapping of respective Information, and the downlink resources can be effectively utilized.

[0157] In addition, in the mobile station apparátus of the embodiment, in case that the receiving unit has received, from the base station apparátus, Information fór specifying modulation scheme and coding rate of the uplink data as the control Information, the transmitting unit identifies modulation scheme and coding rate ofthe reception quality Information, which are associated with the Information fór specifying modulation scheme and coding rate of the uplink data received from the base station apparátus, and transmits, to the base station apparátus, the uplink data to which the modulation scheme and coding rate of the Information fór specifying modulation scheme and coding rate received from the base station apparátus are applied, together with the reception quality Information to which the identified modulation scheme and coding rate are applied.

[0158] In this way, in case of receiving, from the base station apparátus, Information forspecifying modulation scheme and coding rate ofthe uplinkdata as the control Information, the mobile station apparátus can identify modulation scheme and coding rate ofthe reception quality Information, which are associated with the Information, and transmit, to the base station apparátus, the uplink data to which the modulation scheme and coding rate ofthe control Information are applied, together with the reception quality Information to which the identified modulation scheme and coding rate are applied. Hereby, the reception quality Information transmitted from the mobile station apparátus to the base station apparátus can comply with the modulation scheme and the coding rate of the uplink data, improving probability of successful transmission ofthe reception quality Information.

[0159] In addition, the mobile station apparátus according to the embodiment is directed to the mobile station apparátus is allocated resources by the base station apparátus, and comprising: a receiving unit fór receiving, from the base station apparátus, control Information forspecifying a transmission formát of Information to be transmitted using the uplink, and a transmitting unit fór transmitting, to the base station apparátus, the uplink data and the ACK/NACK together based on the specified transmission formát in case that the receiving unit has received the control Information from the base station apparátus.

[0160] In addition, in the mobile station apparátus ofthe embodiment, the transmission formát of Information to be transmitted using the uplink is that of the uplink data and that of the ACK/NACK.

[0161] In addition, in the mobile station apparátus ofthe embodiment, the transmission formát of Information to be transmitted using the uplink is that ofthe uplink data, and the receiving unit automatically recognizes the transmission formát ofthe ACK/NACK from that ofthe uplink data.

[0162] In this way, as the mobile station apparátus transmits, to the base station apparátus, the uplink data and the ACK/NACK together based on the specified transmission formát in case of having received the control Information from the base station apparátus, the base station apparátus can omit the transmission of any control signals fór specifying the mapping of respective Information, and the downlink resources can be effectively utilized. Additionally, as the trans20

ΕΡ 2 187 666 Β1 mission formát is specified based on the way of allocating uplink resources, the mapping of the uplink data and the ACK/NACK can be changed, and the transmission of control signals fór changing the mapping of respective Information can be omitted. As a result, any delay occurring in changing the mapping of respective Information can be reduced. [0163] In addition, in the mobile station apparátus ofthe embodiment, in case that the receiving unit has received, from the base station apparátus, resource Information specified by frequency component and time component as the control Information, the transmitting unit transmits, to the base station apparátus, uplink data and ACK/NACK together in the transmission formát based on mapping of uplink data and ACK/NACK, which is associated with the resource Information.

[0164] In this way, in case that resource Information specified byfrequency component and time component is received from the base station apparátus, the transmission formát fór transmitting the uplink data and the ACK/NACK together to the base station apparátus can be specified. Hereby, the base station apparátus can omit the transmission of any control signals fór specifying the mapping of respective Information, and the downlink resources can beeffectively utilized. [0165] In addition, in the mobile station apparátus ofthe embodiment, in case that the receiving unit has received, from the base station apparátus, Information fór specifying modulation scheme and coding rate of uplink data as the control Information, the transmitting unit identifies modulation scheme and coding rate of ACK/NACK, which are associated with the Information fór specifying modulation scheme and coding rate of uplink data received from the base station apparátus, and transmits, to the base station apparátus, uplink data to which the modulation scheme and coding rate ofthe Information fór specifying modulation scheme and coding rate received from the base station apparátus are applied, together with ACK/NACK to which the identified modulation scheme and coding rate are applied.

[0166] In this way, in case of receiving, from the base station apparátus, Information forspecifying modulation scheme and coding rate ofthe uplink data as the Control Information, the mobile station apparátus can identify modulation scheme and coding rate ofthe ACK/NACK, which are associated with the Information, and transmit, to the base station apparátus, the uplink data to which the modulation scheme and the coding rate of the Information are applied, together with the ACK/NACK to which the identified modulation scheme and coding rate are applied. Hereby, the ACK/NACK transmitted from the mobile station apparátus to the base station apparátus can comply with the modulation scheme and the coding rate ofthe uplink data, improving probability of successful transmission ofthe ACK/NACK.