Scheduling apparatus and scheduling method
Abstract
This record has no abstract on file.
Term
3.4 yearsto projected expiry
Projected expiry 17 February 2030, counted from filing; an application has no term until it is granted.
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8 claims: 2 independent, 6 dependent
- 1Um aparelho de escalonamento (300) compreendendo:uma secção de definição de atribuição de frequência (301) adaptada para definir um tamanho de grupo de blocos de recursos de acordo com uma largura de banda do sistema e um número de clusters a ser atribuído a um aparelho terminal (400);em que o tamanho do grupo de blocos de recursos é um número de blocos de recursos contíguos incluídos num grupo de blocos de recursos respetivo e em que cada um dos clusters compreende um ou mais grupos de blocos de recursos de acordo com o tamanho do grupo de blocos de recursos definido;e e em que o aparelho de escalonamento (300) compreende ainda: um escalonador (113) adaptado para atribuir um recurso de frequência ao aparelho terminal (400) com base no tamanho do grupo de blocos de recursos que é definido pela secção de definição de atribuição de frequência (301);caracterizado por um valor, que é definido como o tamanho do grupo de blocos de recursos, depender da largura de banda do sistema e do número de clusters;e em que cada cluster atribuído ao aparelho terminal (400) é separado de outro cluster, o qual é também atribuído ao aparelho terminal (400), no domínio de frequência.
- 2O aparelho de escalonamento (300) de acordo com a reivindicação 1, compreendendo ainda uma secção de relatório adaptada para dividir a largura de banda do sistema numa pluralidade de grupos de blocos de recursos com base no tamanho do grupo de blocos de recursos definido e adaptada ainda para reportar ao aparelho terminal (400) uma sequência de bits de atribuição de frequência correspondente a um padrão de disposição de grupos de blocos de recursos que são alocados ao aparelho terminal e grupos de blocos de recursos que não são atribuídos ao aparelho terminal.
- 3O aparelho de escalonamento (300) de acordo com a reivindicação 2, em que um número de bits que formam a sequência de bits de atribuição de frequência é constante, independentemente do número de clusters.
- 4O aparelho de escalonamento (300) de acordo com a reivindicação 2, compreendendo ainda uma secção de estimativa de canal (107) adaptada para calcular um valor de estimativa de canal com base num sinal de referência transmitido a partir do aparelho terminal (400), em que:a secção de definição de atribuição de frequência (501) está ainda adaptada para determinar se deve ou não deslocar o recurso de frequência atribuído pelo escalonador (502) para uma gama de frequência mais elevada, com base no valor de estimativa de canal;e o escalonador (502) está ainda adaptado para adicionar informação de correção correspondente a um resultado da determinação na secção de definição de atribuição de frequência (501) à sequência de bits de atribuição de frequência.
- 5Um método de escalonamento compreendendo o passo de:definição, por uma secção de definição de atribuição de frequência, de um tamanho de grupo de blocos de recursos de acordo com uma largura de banda do sistema e um número de clusters a ser atribuído a um aparelho terminal;em que o tamanho do grupo de blocos de recursos é um número de blocos de recursos contíguos incluídos num grupo de blocos de recursos respetivo e em que cada um dos clusters compreende um ou mais grupos de blocos de recursos de acordo com o tamanho do grupo de blocos de recursos definido;e em que o método compreende ainda o passo de: atribuição, por um escalonador, de um recurso de frequência ao aparelho terminal com base no tamanho do grupo de blocos de recursos que é definido pela secção de definição de atribuição de frequência;caracterizado por um valor, que é definido como o tamanho do grupo de blocos de recursos, depender da largura de banda do sistema e do número de clusters;e em que cada cluster atribuído ao aparelho terminal (400) é separado de outro cluster, o qual é também atribuído ao aparelho terminal (400), no domínio de frequência.
- 6O método, de acordo com a reivindicação 5, compreendendo ainda os passos de:divisão, por uma secção de relatório, da largura de banda do sistema numa pluralidade de grupos de blocos de recursos com base no tamanho do grupo de blocos de recursos definido;e relato, ao aparelho terminal, de uma sequência de bits de atribuição de frequências correspondendo a um padrão de disposição de grupos de blocos de recursos que são alocados ao aparelho terminal e aos grupos de blocos de recursos que não estão atribuídos ao aparelho terminal.
- 70 método de acordo com a reivindicação 6, em que um número de bits que formam a sequência de bits de atribuição de frequência é constante, independentemente do número de clusters.
- 80 método, de acordo com a reivindicação 6, compreendendo ainda os passos de:cálculo, por uma secção de estimativa de canal, de um valor de estimativa de canal com base num sinal de referência transmitido a partir do aparelho terminal;determinação, pela secção de definição de atribuição de frequência, se se deve, ou não, deslocar o recurso de frequência atribuído pelo escalonador para uma gama de frequência mais elevada, com base no valor de estimativa de canal;e adição, pelo escalonador, de informação de correção correspondente a um resultado da determinação na secção de definição de atribuição de frequência à sequência de bits de atribuição de frequência.
Independent claims8
129 paragraphs in 2 sections, as filed
DESCRIPTION OF SCHEDULING APPARATUS AND SCHEDULING METHOD
Technical field
The present invention relates to a stepping apparatus and a stepping method.
State of the art
Towards an uplink channel of the long-term evolution of the 3-year partnership project<sup>The</sup> generation (3GPP LTE), a data signal from each terminal is assigned to contiguous frequency bands to reduce cubic metric (CM) and peak-to-average power ratio (PAPR). Transmission using these contiguous frequency bands may be called contiguous frequency transmission.
A terminal transmits data according to frequency resource allocation information reported by a base station. Frequency resource allocation information for contiguous frequency transmission involves two information about a start position and an end position (or a bandwidth from a start position) in a transmission band. Therefore, when the system bandwidth is expressed as NRB [RB], the number of frequency resource assignment information signaling bits can be represented by equation 1 below. That is, since the number of candidates for a start position and an end position in a transmission band can be expressed as Nrb (the numbers at both ends and edges between two adjacent RBs in a frequency band) + 1 signaling bits are required for the combination numbers to select two candidates for a starting position and an ending position in the frequency band outside the number of candidates Nrb +1 in equation 1.
[1] the bia nunier of shiabação. [bite]
W '
... (Equation 1) where a resource block (RB) is a unit for assigning frequency to data. An RB is formed with 12 subcarriers. When NRB = 100 [RB] is satisfied, the number of signaling bits is 13 [bits].
For an LTE-Advanced uplink channel, which is an evolved version of the long-term evolution of the 3-way partnership project.<sup>The</sup> generation (3GPP LTE) using non-contiguous frequency transmission in addition to contiguous frequency transmission is under consideration to improve sector throughput performance (see Non-Patent Literature 1).
Noncontiguous frequency transmission is a method of transmitting a data signal and a reference signal by assigning such signals to noncontiguous frequency bands which are dispersed over a wide range of bands. As shown in FIG. 1, in non-contiguous frequency transmission, it is possible to assign a data signal and a reference signal to discrete frequency bands. Therefore, in non-contiguous frequency transmission compared to contiguous frequency transmission, the flexibility in assigning a data signal and a reference signal to the frequency bands at each terminal increases. By this means, it is possible to obtain greater frequency scaling effects.
Here, as a method of reporting frequency resource assignment information for noncontiguous frequency transmission, there is a method of reporting whether or not to perform assignment for each RB in the system band using a bitmap (see Unpatented Literature 2 ). As shown in FIG. 2, a base station reports whether or not to allocate the resource per predetermined frequency assignment unit [RB] (by 4 [RB] in FIG. 2) using one bit. That is, a base station reports to a terminal to which the frequency is assigned, a frequency assignment bit sequence that is obtained by assigning bit value 1 to the first and assigning bit value 0 to the last of the subband. assignment which is assigned to a terminal to which the frequency is assigned and to the non-assigned non-assignment subband in a plurality of subbands that are formed by dividing the system band by frequency assignment unit [RB ]. In FIG. 2, the frequency assignment unit to which bit 1 is assigned is a frequency area assigned to a terminal to be assigned while the frequency assignment unit to which bit 0 is assigned is an unassigned frequency area. to the terminal to be assigned. Therefore, by expressing a system bandwidth as Nrb [RB] and a frequency assignment unit as P [RB], the number of signaling bits required for the frequency resource assignment information of this method can be represented by equation 2 below.
[2] the number of bits of si π ah zation ”
List of Quotes
Unpatented Literature
NPL 1 3GPP Rl-090257, Panasonic, System performance of non-contiguous uplink resource allocation
NPL 2 3GPP TS36.212 V8.3.0. 5.3.3.1.2 DCI Format 1 Type
0, E-UTRA Multiplexing and Channel Coding (Release 8)
NPL 3 3GPP Rl-084583, Panasonic, Comparison between Clustered DFT-s-OFDM and OFDM to support noncontiguous RB allocation within a component carrier
Uplink multiple access schemes for LTE-A, by LG Electronics, Rl-083658, 3GPP TSG RAN WG1 # 54bis, Prague, Czech Republic, 29 September to 3 October, 2008 looks at several uplink multiple access scheme options LTE-A from the point of view of CM and decoding performances in both non-MIMO and MIMO cases.
As an option discussed, with clustered DFT-s-OFDMA, DFT precoding output can be mapped to multiple clustered RBs in the frequency domain. This option can provide more uplink scheduling flexibility for better geometry UEs while allowing single-carrier transmission to power-limited UEs by scaling only localized RBs.
Nokia Siemens Networks Uplink multiple access for LTE-Advanced, Rl-082609, RAN WG1 Meeting # 53bis, Warsaw, Poland, 30 June to 4 July, 2008 discusses the need for change in LTE-Uplink multiple access Advanced as well as options for multiple access providing backward compatibility such as DFT-s-OFDMA with clustered subcarrier mapping.
EP 3 131 358 A1, which falls within the art. (3) EPC and which is not relevant to the question of inventive activity, refers to a method of communication between a user equipment, UE, and a node B in a communication system. 0 a communication method comprising receiving a scheduling assignment including a resource allocation type, a resource allocation, a Modulation and Coding Scheme, MCS, and a node B frequency hopping flag; and data transmission based on the scheduling assignment for node B, where the resource allocation type indicates whether the resource allocation is for a first set of at least one contiguous resource block or second resource block sets. , and the frequency hopping flag is used as part of resource allocation based on the resource allocation type, and wherein each of the second sets comprises one or more consecutive resource block groups.
Summary of the Invention
Technical problem
However, non-contiguous frequency transmission has a problem that the number of signaling bits required to report frequency resource assignment information increases compared to contiguous frequency transmission. For example, when NRB = 100 [RB] and P = 4 [RB] are satisfied, the number of signaling bits is 25 [bits]. Although it is possible to increase an RB assignment unit (P) to reduce the number of signaling bits, if the RB assignment unit is simply increased, the frequency scaling flexibility decreases, thereby damaging the system throughput.
It is therefore an object of the present invention to provide a scheduling apparatus and a scheduling method for making it possible to maintain system throughput performance and reduce the amount of signaling for frequency resource assignment information.
Solution to the problem
A scheduling apparatus according to the present invention employs a configuration for having a frequency assignment definition section that defines a frequency assignment unit based on the number of clusters to be applied to a terminal to which the frequency is assigned; and a scheduler that assigns a frequency resource to the terminal to which the frequency is assigned based on the defined frequency assignment unit.
A scheduling method according to the present invention employs a configuration for defining a frequency assignment unit based on the number of clusters to apply to a terminal to which the frequency is assigned; and assigns a frequency resource to the terminal to which the frequency is assigned based on the defined frequency assignment unit.
Advantageous Effects of the Invention
According to the present invention, it is possible to provide a scheduling apparatus and a scheduling method to make it possible to maintain system throughput performance and reduce the amount of signaling for frequency resource assignment information.
Brief Description of Drawings
FIG. 1 shows non-contiguous frequency transmission;
FIG. 2 shows a method of reporting frequency resource assignment information for non-contiguous frequency transmission;
FIG. 3 is a block diagram showing a configuration of a base station apparatus according to Embodiment 1 of the present invention;
FIG. 4 is a block diagram showing a configuration of a terminal apparatus according to Embodiment 1 of the present invention;
FIG. 5 shows an example of a table showing the matching of a plurality of cluster numbers and frequency assignment units corresponding to each cluster number;
FIG. 6 shows a relationship between the maximum number of clusters that can be transmitted by a terminal device and the sector average transfer rate;
FIG. 7 shows a method for determining a frequency assignment unit corresponding to each number of clusters;
FIG. 8 shows an example of a table showing the matching of a plurality of cluster numbers and frequency assignment units corresponding to each cluster number;
FIG. 9 is a block diagram showing a configuration of a base station apparatus according to Embodiment 2 of the present invention;
FIG. 10 shows an example of a table showing the matching of a plurality of cluster numbers and frequency assignment units corresponding to each cluster number;
FIG. 11 is a block diagram showing a configuration of a terminal apparatus according to Embodiment 2 of the present invention;
FIG. 12 is a block diagram showing a configuration of a base station apparatus according to Embodiment 3 of the present invention;
FIG. 13 shows compensation information for tuning adjustment of a frequency assignment position:
FIG. 14 shows an example of a table showing the matching of a plurality of cluster numbers and frequency assignment units corresponding to each cluster number;
FIG. 15 shows an example of a table showing the matching of a plurality of cluster numbers and frequency assignment units corresponding to each cluster number;
FIG. 16 shows an example of a table showing the matching of a plurality of cluster numbers and frequency assignment units corresponding to each cluster number; and
FIG. 17 shows an example of a table showing the matching of a plurality of cluster numbers and frequency assignment units corresponding to each cluster number.
Description of Embodiments
In the following, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In embodiments, the same parts will be assigned the same reference numerals and overlapping explanations will be omitted.
(Embodiment 1)
FIG. 3 is a block diagram showing a configuration of base station apparatus 100 according to Embodiment 1 of the present invention. In FIG. 3, base station apparatus 100 is provided with RF receiving section 101, demultiplexing section 102, DFT sections 103 and 104, demapping sections 105 and 106, channel estimation section 107, frequency domain equalization section 108, IDFT section 109, demodulation section 110, decoding section 111, frequency assignment parameter setting section 112, scaling section 113, coding section 114, modulation section 115 and RF transmission section 116.
RF receiving section 101 performs reception processing, such as downconverting and A / D conversion, on a signal received from terminal apparatus 200 (described later) via an antenna, and sends the processed receiving signal to the demultiplexing section. 102.
Demultiplexing section 102 demultiplexes the signal input from RF receiving section 101 to a pilot signal and a data signal. Demultiplexing section 102 then outputs the pilot signal to DFT section 103 and outputs the data signal to DFT section 104.
DFT section 103 performs DFT processing on the pilot signal received from demultiplexing section 102 to convert a time domain signal to a frequency domain signal. Then, DFT section 103 outputs the pilot signal converted to a frequency domain for demapping section 105.
The demapping section 105 extracts a pilot signal corresponding to the transmission band of terminal apparatus 200 (described below) from the frequency domain pilot signal received from section DFT 103, and outputs the pilot signal to channel estimation section 107.
Channel estimation section 107 estimates frequency variation in a channel (i.e. channel frequency response) and frequency band reception quality by performing correlation calculation on the receive pilot signal received from demapping section 105 and the signal transmission pilot which is known between base station apparatus 100 and terminal apparatus 200. Next, channel estimation section 107 outputs a channel estimate value, which is a result of this estimate, for frequency domain equalization section 108 and scaling section 113.
DFT section 104 performs DFT processing on the received data signal from demultiplexing section 102 to convert a time domain signal to a frequency domain signal. Then, DFT section 104 outputs the data signal converted to a frequency domain to demapping section 106.
The demapping section 106 extracts part of the data signal corresponding to the transmitting band of the terminal apparatus 200 from the signal received from the DFT section 104, and outputs the data signal to the time domain estimation section 108.
Frequency domain equalization section 108 performs equalization processing on the received data signal from demapping section 106 using the channel estimation value (i.e., channel frequency response) received from channel estimation section 107. Then, the frequency domain equalization section 108 outputs the signal obtained by equalization processing to the IDFT section 109.
The IDFT section 109 performs IDFT processing at the frequency domain equalization section data signal input 108. Then, the IDFT section 109 outputs the signal obtained by the IDFT processing to the demodulation section 110.
The demodulation section 110 performs demodulation processing on the signal received from the IDFT section 109 and outputs the signal obtained by the modulation processing to the decoding section 111.
Decoding section 111 performs decoding processing on the received signal from demodulation section 110 and extracts the reception data.
Frequency assignment parameter setting section 112 maintains information about the relationship between the number of clusters and the frequency assignment unit that is applied to a terminal to which the frequency is assigned. Frequency assignment parameter setting section 112, for example, maintains a table showing the correspondence of a plurality of cluster numbers and frequency assignment units corresponding to each number of clusters. Thereafter, frequency assignment parameter setting section 112 defines a frequency assignment unit corresponding to the number of clusters indicated by the input information on the number of clusters, to scheduling section 113. Such definition processing on a frequency basis. Frequency assignment unit is executed for each terminal, to which the frequency is assigned. That is, frequency assignment parameter setting section 112 sets a frequency assignment unit to be set for scheduling section 113 based on the number of clusters to apply to a terminal to which the frequency is assigned.
Here, a frequency assignment unit varies depending on the number of clusters. In addition, an upper limit value is determined for the number of clusters to apply to a terminal to which the frequency is assigned. In this regard, the relationship between the number of clusters and the frequency assignment unit that are applied to a terminal to which the frequency is assigned is determined in advance for each base station apparatus 100 or the entire system. This relationship will be described in detail later.
Scaling section 113 assigns a frequency resource to a terminal to which the frequency is assigned, based on the frequency assignment unit defined by the frequency assignment parameter setting section 112. Specifically, the scheduling section 113 performs frequency scaling for an arbitrary terminal to which the frequency is assigned, based on the reception quality information, in each subband of a predetermined transmission band, over a signal transmitted in the frequency band. predetermined transmission from the arbitrary terminal to which the frequency is assigned, which is received from channel estimation section 107, and the frequency assignment unit that is received from the frequency assignment parameter setting section 112 and is applied to the arbitrary terminal to which the frequency is assigned. 0 frequency scaling information reporting is performed, as described above, by a frequency assignment bit sequence corresponding to an assignment subband array pattern that is assigned to a terminal to which the frequency is assigned and to the subnet. unassigned band which is not assigned in a plurality of subbands that are formed by dividing the system band by frequency assignment unit.
The coding section 114 encodes the transmission data, including frequency scaling information, to a terminal to which the frequency is assigned, and sends the coded data to the modulation section 115.
Modulation section 115 modulates the encoded data received from coding section 114 and sends the modulated signal to RF transmitting section 116.
The RF transmission section 116 performs transmission processing, such as D / A conversion, upconversion and amplification, on the modulated signal received from the modulation section 115 and transmits the obtained radio signal to the terminal apparatus 200 through the antenna.
FIG. 4 is a block diagram showing a configuration of terminal apparatus 200 according to Embodiment 1 of the present invention. In FIG. 4, terminal apparatus 200 is provided with RF receiving section 201, demodulation section 202, decoding section 203, frequency assignment parameter setting section 204, scaling information setting section 205, coding section 206, modulation section 207, section
DFT 208, mapping section 209, IDFT section 210, and RF transmitting section 211.
The RF receiving section 201 performs reception processing, such as downconverting and A / D conversion, on a signal received through an antenna, and outputs the processed receiving signal to the demodulation section 202.
The demodulation section 202 performs equalization processing and demodulation processing on the signal received from the RF receiving section 201, and outputs the signal thus processed to the decoding section 203.
Decoding section 203 performs decoding processing on the received signal from demodulation section 202 and extracts control data including reception data and frequency scaling information.
The coding section 206 encodes the transmission data and outputs the coded data obtained for the modulation section 207.
Modulation section 207 modulates the coded data received from coding section 206 and outputs the data modulated signal to section DFT 208.
DFT section 208 performs DFT processing on the data modulated signal received from modulation section 207 and outputs the obtained frequency domain data signal to mapping section 209.
Mapping section 209 maps the received data signal from DFT section 208 to a frequency domain resource according to the frequency assignment information received from the staging information definition section 205 and outputs the signal obtained to the IDFT section 210
Frequency assignment parameter setting section 204 extracts information on the number of clusters contained in the control data received from decoding section 203. In addition, frequency assignment parameter setting section 204 maintains a table showing correspondence that is similar to the table maintained in the frequency assignment parameter setting section 112 on the base station apparatus 100. So the frequency assignment parameter setting section
<td>204 issues</td><td colspan="2">one unit</td><td>in</td><td>assignment</td><td colspan="2">frequency</td>
<td colspan="2">corresponding to</td><td>number</td><td>in</td><td>clusters</td><td>indicated</td><td>through the</td>
<td>information</td><td>extracted</td><td>about</td><td>O</td><td>number of</td><td>clusters,</td><td>for</td>
<td>stagger to</td><td>section of</td><td colspan="2">definition</td><td colspan="2">information 205.</td><td></td>
The scheduling information setting section 205 extracts the frequency assignment information contained in the control data received from the decoding section 203. Then, the scheduling information setting section 205 determines the frequency scaling information for the terminal apparatus. 200 based on the extraction frequency assignment information and frequency assignment unit of the frequency assignment parameter setting section 204. Specifically, the scaling information setting section 205 reads the frequency assignment information reported from the base station apparatus 100 per frequency assignment unit received from the frequency assignment parameter setting section 204 and determines whether the information is or is not the actual frequency assignment information to be used by the terminal apparatus 200. Then, the scheduling information definition section 205 outputs the frequency assignment information for the terminal apparatus 200 to the mapping section 209.
The IDFT section 210 performs IDFT processing on the signal received from mapping section 209. Then, the IDFT section 210 outputs the signal obtained by IDFT processing to RF transmission section 211.
The RF transmission section 211 performs transmission processing, such as D / A conversion, upconversion and amplification, on the signal received from the IDFT section 210 and transmits the obtained radio signal to the base station apparatus 100 through the antenna.
Next, information about the relationship between the number of clusters and the frequency assignment unit that is applied to a terminal to which the frequency is assigned, which is maintained in the frequency assignment parameter setting section 112, will be described. below.
FIG. 5 shows an example of a table showing the matching of a plurality of cluster numbers and frequency assignment units corresponding to each cluster number. In FIG. 5, the upper limit value for the number of clusters is 4. In addition, the number of clusters of 1 is excluded because the number indicates contiguous frequency transmission. In addition, the number of frequency assignment information bits (that is, the number of bits forming a frequency assignment bit sequence) is constant regardless of the number of clusters.
Here, the upper limit number of clusters is set based on the relationship between the number of clusters and system throughput performance. FIG. 6 shows the relationship between the maximum number of clusters that can be transmitted by a terminal device and the industry average throughput (see Non-Patent Literature 3). FIG. 6 shows that system throughput performance does not deteriorate even when the number of clusters is limited to about 3 to 4. This is because the probability that the number of clusters in a terminal becomes 4 or larger is low. As described above, because the influence on system throughput performance is small, you can set the upper limit value for the number of clusters.
In addition, a frequency assignment unit corresponding to each number of clusters is determined as described below. First, a reference number of clusters, which is a norm, is determined. As a cluster reference number, the most commonly used cluster number is selected, for example. Then, when the cluster reference number is selected, the number of signaling bits that is required to report frequency resource assignment information is set to the reference number of bits. Then, for the number of clusters in addition to the cluster reference number, the frequency assignment unit that has the closest number of signaling bits to the reference number of bits is selected, requiring the number of signaling bits to report. frequency resource assignment information using that number of clusters.
FIG.
shows a method for determining a frequency assignment unit that corresponds to each number of clusters. Each point in FIG. 7 is plotted based on equation 3 below.
[3] ó · rSignature bhs type ah ^ .Aú · U [bus] where a system bandwidth is expressed in Nrb [RB], the number of clusters is expressed as Nciuster and a frequency assignment unit is expressed as P [RB].
FIG. 7 shows a graph of the relationship between the number of clusters and the number of signaling bits when Nrb = 100 [RB] is satisfied. Assuming that the number of signaling bits of 18 [bits], in the case of the number of clusters of 2 and P = 2 [RB], is defined as the reference number of bits, a frequency assignment unit of 4 with the Closest number of signaling bits for bit reference number 18 is selected when the number of clusters is 3 and similarly a frequency assignment unit of 5 is selected when the number of clusters is 4.
FIG. 7 shows the number of signaling bits when using the conventional technique described above, wherein the number of signaling bits is fixed (the number of signaling bits is 25 bits for P = 4), regardless of the number of signaling bits. clusters. As is evident from FIG. 7, by limiting the maximum number of clusters to 4 according to the present embodiment, it is possible to reduce the number of signaling bits compared to the conventional technique.
In addition, by making the signaling bit numbers the same for each number of clusters, it is possible to use a signaling format regardless of the number of clusters. Hereby, the terminal apparatus 200 may reduce the blind decoding processing number to detect a signaling format.
As described above, according to the present embodiment, in base station apparatus 100, the staging section 113 assigns a frequency resource to a terminal to which the frequency is assigned based on the defined frequency assignment unit. and frequency assignment parameter setting section 112 adjusts a frequency assignment unit to set for scheduling section 113, based on the number of clusters to apply to the terminal to which the frequency is assigned.
In doing so, you can assign a frequency resource based on the frequency assignment unit optimized for the number of signaling bits for each number of clusters. As a result, you can reduce the amount of signaling for frequency resource assignment information. In addition, by setting the number of clusters, which is a parameter with little influence on system throughput, as a setting parameter for the frequency assignment unit, you can maintain the system throughput.
In addition, the number of bits forming a frequency assignment bit sequence is constant regardless of the number of clusters.
By doing so, you can report frequency resource assignment information using a common signaling format, regardless of the number of clusters. By this means, it is possible to reduce the number of blind decoding processing to detect a signaling format in a side reception scheduling information.
A case with the above description has been described wherein the number of bits forming a frequency assignment bit sequence is constant regardless of the number of clusters. However, the number of bits forming a frequency assignment bit sequence may vary depending on the number of clusters. In this case, coding section 114 makes the total number of bits constant regardless of the number of clusters by adding padding bits (for example, a bit value of 0) before coding a frequency assignment bit sequence. For example, as shown in FIG. 8, in determining frequency assignment units and signaling bit numbers for cluster numbers 3 and 4, setting the number of signaling bits (= 22 [bits]) in the case of the number of clusters 2 to bit reference number, signaling bit numbers required to report frequency assignment information are not the same. In this case, because coding section 114 adds a fill bit to make the signaling bit numbers equal, it is possible to share a signaling format, making it possible to reduce the blind decoding processing number to detect a signaling format in an information. reception stepping step.
(Embodiment 2)
A case will be described herein with Embodiment 2 wherein, as a parameter for determining a frequency assignment unit, a system bandwidth is adopted beyond the number of clusters.
FIG. 9 is a block diagram showing a configuration of base station apparatus 300 according to Embodiment 2 of the present invention. In FIG. 9, base station apparatus 300 is provided with a frequency assignment parameter setting section 301.
Frequency assignment parameter setting section 301 maintains information about the relationship between the number of clusters and the frequency assignment unit that is applied to a terminal to which the frequency is assigned, per system bandwidth. Frequency assignment parameter setting section 301 has, for example, a second table showing the correspondence shown in FIG. 10, in addition to the first table showing the correspondence shown in FIG. 5 The system bandwidths to be used for the first table showing match and the second table showing match are different. Here, the term system bandwidth refers to a bandwidth of all bandwidth that the base station apparatus 300 can receive, that is, a total bandwidth bandwidth that can be assigned to terminals in the cell. covered by the base station apparatus 300.
Then, in the table showing correspondence corresponding to the bandwidth of the system to be input, the frequency assignment parameter setting section 301 defines a frequency assignment unit according to the number of clusters indicated by the number of frequency information. clusters to be introduced, for staging section 113. Frequency assignment parameter setting section 301 uses, for example, the first table showing the correspondence shown in FIG. 5 when the system bandwidth is 100 [RB] and uses the second table showing the correspondence shown in FIG. 10 when the system bandwidth is 200 [RB]. That is, frequency assignment parameter setting section 301 changes tables showing the match to use depending on the system bandwidth.
Here, when system bandwidth varies, the utilization rate per number of clusters of a terminal device in the system changes. For example, as the amount of frequency resources that can be used by a terminal device changes as the system bandwidth is increased, a larger number of clusters must be assigned to a terminal device to improve the rate of bandwidth performance. transfer.
Therefore, frequency assignment parameter setting section 301 changes tables showing the match to be used depending on the system bandwidth, so that the optimal table showing match according to the system bandwidth can be used.
FIG. 11 is a block diagram showing a configuration of terminal apparatus 400 according to Embodiment 2 of the present invention. In FIG. 11, the terminal apparatus 400 is provided with a frequency assignment parameter setting section 401.
Frequency assignment parameter setting section 401 extracts information about the number of clusters and information about a system bandwidth contained in the control data received from decoding section 203. In addition, the frequency assignment parameter setting section 401 maintains a table showing correspondence that is similar to the table maintained in the frequency assignment parameter setting section 301 of the base station apparatus 300. The frequency assignment parameter setting section 401 then issues a frequency assignment unit corresponding to the system bandwidth indicated by the extracted information about a system bandwidth and the number of clusters indicated by the number information. clusters, for the scheduling information definition section 205.
As described above, according to the present embodiment, in the base station apparatus 300, the frequency assignment parameter setting section 301 adjusts the frequency assignment unit to be set based on the bandwidth of the band. in addition to the number of clusters.
In doing so, you can use the optimal relationship between the number of clusters and the frequency assignment unit corresponding to the system bandwidth, making it possible to improve system throughput performance.
(Embodiment 3)
A case will be described herein with Embodiment 3 where, when the number of bits forming a frequency assignment bit sequence varies depending on the number of clusters, correction information for fine-tuning the frequency assignment position is added, no 0-bit padding.
FIG. 12 is a block diagram showing a configuration of base station apparatus 500 according to Embodiment 3 of the present invention. In FIG. 12, base station apparatus 500 is provided with a frequency assignment parameter setting section 501 and step section 502.
Frequency assignment parameter setting section 501 determines whether or not to shift the frequency resource assigned in staging section 502 in a frequency direction based on the channel estimate value received from channel estimate section 107. The default for deciding whether to offset is based on the quality of the channel in the RB to be assigned. For example, the RB to be assigned a higher average SINR is selected by calculating the average SINRs in the RBs to be assigned for cases where p offset is executed and not executed. By this means, because it is possible to assign higher channel quality RB to a terminal, it is possible to improve system throughput performance.
The scheduling section 502 forms a frequency assignment bit sequence, just as the scheduling section 113 does. In addition, scaling section 502 adds correction information to a frequency assignment bit sequence according to the result of the determination in the frequency assignment parameter definition section.
501 For example, as shown in FIG. 13, the bit value of 0 is set as correction information when the determination not to perform the offset is made, while the bit value of 1 is set as correction information when the offset is performed. An example of a table showing correspondence in this case is shown in FIG. 14
As described above, in accordance with the present invention, in the base station apparatus 500, the frequency assignment parameter setting section 501 determines whether or not to shift the allocated frequency resource in the scaling section 502, in a frequency direction, based on the estimated channel value, and stepping section 502 adds correction information to a frequency assignment bit sequence corresponding to the determination result in the frequency assignment parameter setting section 501.
By doing so, the flexibility in frequency scaling increases so that you can accurately allocate good channel quality frequency resources, making it possible to improve system throughput performance.
(Additional Embodiment) (1) In the above embodiments, it is possible to change methods of reporting frequency scaling information according to the number of clusters between the Embodiment 1 to 3 method and a conventional method (i.e. , a method of reporting in bitmap format). For example, as shown in FIG. 15, it is possible to apply both the Embodiment 1 to 3 method when the number of clusters is 4 or less, and to apply the conventional method when the number of clusters is 5 or greater.
(2) In the above embodiments, when the number of clusters to be reported is not a power of 2, it is possible to report identifying information using a standard that combines the number of clusters and frequency assignment information. For example, as shown in FIG. 16, by reporting identification information using the pattern combining number of clusters and frequency assignment information, it is possible to reduce the number of global signaling bits to the number of clusters and frequency assignment information. The comparison of FIG. 16 with FIG. 8 shows that in the case of the number of clusters of 3, it is possible to reduce the global signaling bits to the number of clusters and the frequency assignment information by one bit. By assigning this reduced number of bits to the correction information, you can increase the flexibility in frequency scaling, making it possible to improve system performance.
(3) Although cases have been described with the above embodiments, where the case of number of clusters of 1 is excluded, it is possible to include the number of clusters of 1 (contiguous frequency assignment). For example, as shown in FIG. 17, by sharing a signaling format common in contiguous frequency assignment and non-contiguous frequency assignment, it is possible to reduce the blind decoding processing number to detect a signaling format in a side reception scheduling information.
(4) Also, although cases have been described with the above embodiments as examples in which the present invention is hardware configured, the present invention may also be implemented by software.
Each function block used in the description of each of the above embodiments may typically be implemented as an LSI composed of an integrated circuit. These may be individual or partially or fully contained microcircuits in a single microcircuit. LSI is adopted here, but this can also be referred to as IC, system LSI, super LSI or ultra SLI depending on the different integration extensions.
In addition, the circuit integration method is not limited to LSIs and implementation using dedicated circuits or general purpose processors is also possible. After LSI manufacture, the use of a Programmable Logic Port Network (FPGA) or a reconfigurable processor where circuit cell configurations and connections within an LSI can be reconfigured is also possible.
In addition, if integrated circuit technology comes to replace LSIs as a result of the advancement of semiconductor technology or a derivative of other technology, it is also naturally possible to perform function block integration using this technology.
Industrial Applicability
A scheduling apparatus and a scheduling method according to the present invention is useful for maintaining system throughput performance and reducing the amount of signaling for frequency resource assignment information.
Contents2
74 members in 21 offices
Priority claims1
| Document | Office | Kind | Date |
|---|---|---|---|
| 2009035617 | Japan | A |
Members74
| Document | Office | Kind | |
|---|---|---|---|
| CA2752564A1 | Canada | A1 | |
| WO2010095430A1 | World Intellectual Property Organization (WIPO) | A1 | |
| KR20110121685A | Republic of Korea | A | |
| US2011299496A1 | United States of America | A1 | |
| EP2400807A1 | European Patent Office (EPO) | A1 | |
| CN102318424A | China | A | |
| JPWO2010095430A1 | Japan | A1 | |
| KR20120113792A | Republic of Korea | A | |
| ZA201105982B | South Africa | B | |
| RU2011134498A | Russian Federation | A | |
| JP2013258786A | Japan | A | |
| JP5389151B2 | Japan | B2 | |
| CN102318424B | China | B | |
| CN103701578A | China | A | |
| RU2510804C2 | Russian Federation | C2 | |
| JP5698816B2 | Japan | B2 | |
| JP2015092779A | Japan | A | |
| US9112651B2 | United States of America | B2 | |
| EP2400807A4 | European Patent Office (EPO) | A4 | |
| KR101567124B1 | Republic of Korea | B1 | |
| KR101567130B1 | Republic of Korea | B1 | |
| US2015327270A1 | United States of America | A1 | |
| US9397803B2 | United States of America | B2 | |
| BRPI1008459A2 | Brazil | A2 | |
| CN103701578B | China | B | |
| US2016330002A1 | United States of America | A1 | |
| CA2752564C | Canada | C | |
| JP6132167B2 | Japan | B2 | |
| US9667393B2 | United States of America | B2 | |
| US2017230980A1 | United States of America | A1 | |
| JP2017163558A | Japan | A | |
| US9888477B2 | United States of America | B2 | |
| US2018124793A1 | United States of America | A1 | |
| JP6323737B2 | Japan | B2 | |
| MY166138A | Malaysia | A | |
| EP2400807B1 | European Patent Office (EPO) | B1 | |
| JP2018121360A | Japan | A | |
| EP3379880A1 | European Patent Office (EPO) | A1 | |
| LT2400807T | Lithuania | T | |
| DK2400807T3 | Denmark | T3 | |
| SI2400807T1 | Slovenia | T1 | |
| PT2400807TThis record | Portugal | T | |
| SMT201800526T1 | San Marino | T1 | |
| ES2689969T3 | Spain | T3 | |
| HRP20181636T1 | Croatia | T1 | |
| PL2400807T3 | Poland | T3 | |
| JP6474013B2 | Japan | B2 | |
| HUE040607T2 | Hungary | T2 | |
| JP2019092177A | Japan | A | |
| CY1120760T1 | Cyprus | T1 | |
| JP6635422B2 | Japan | B2 | |
| US10568099B2 | United States of America | B2 | |
| JP2020036378A | Japan | A | |
| US2020128545A1 | United States of America | A1 | |
| JP6796811B2 | Japan | B2 | |
| BRPI1008459B1 | Brazil | B1 | |
| JP2021036692A | Japan | A | |
| MY184502A | Malaysia | A | |
| EP3379880B1 | European Patent Office (EPO) | B1 | |
| JP6982813B2 | Japan | B2 | |
| US11240806B2 | United States of America | B2 | |
| JP2022028713A | Japan | A | |
| EP3962210A1 | European Patent Office (EPO) | A1 | |
| US2022110127A1 | United States of America | A1 | |
| BRPI1008459B8 | Brazil | B8 | |
| EP3962210B1 | European Patent Office (EPO) | B1 | |
| EP4221404A1 | European Patent Office (EPO) | A1 | |
| US11751181B2 | United States of America | B2 | |
| JP7345098B2 | Japan | B2 | |
| US2023362909A1 | United States of America | A1 | |
| JP2023164853A | Japan | A | |
| JP7584068B2 | Japan | B2 | |
| US12185294B2 | United States of America | B2 | |
| US2025089034A1 | United States of America | A1 |
Numbers
- Application
- 10743560
Titles2
- English
- SCHEDULING APPARATUS AND SCHEDULING METHOD
- Portuguese
- APARELHO DE ESCALONAMENTO E MÉTODO DE ESCALONAMENTO
Classification
- CPC, 10
- H04L5/0037
- H04W72/0453
- H04L5/0041
- H04L5/0064
- H04W72/21
- H04W72/54
- H04L5/006
- H04L5/0091
- H04W72/23
- H04W72/20
- IPC, 2
- H04L5 00
- H04W72 54