Method and apparatus for wireless transmissions using multiple uplink carriers

This application relates to wireless communication.

(Cross-reference of related applications) This application is incorporated by reference as if fully described herein, US Patent Provisional Application No. 61 / 109,978, filed October 31, 2008, filed November 24, 2008. US Patent Provisional Application No. 61 / 117,494, US Patent Provisional Application No. 61 / 117,851 filed on November 25, 2008, US Patent Provisional Application filed on December 30, 2008 Claims the priority of specification 61 / 141,638 and US patent provisional application 61 / 148,690 filed on January 30, 2009.

Many improvements have been introduced to the UMTS (universal mobile telecommunication system) wireless communication system to increase the data rates available to end users. Following the introduction of HSDPA (High speed downlink packet access) for downlink in Release 5 of 3GPP (3rd Generation Partnership Project), 3GPP to improve uplink performance HSUPA (High speed uplink packet access) was introduced as part of Release 6 of. HSUPA has a short TTI (transmission time) to improve uplink throughput and peak data rates on the new E-DCH (enhanced dedicated channel). Use HARQ (hybrid automatic repeat request) in combination with interval)) and fast scheduling.

WCDMA (wideband code division multiple access) (registered trademark) is an interference-restricted system, so strict control of the uplink transmission power of all WTRUs (wireless transmitter / receiver units) is important. is there. This is achieved by a combination of power control and grant mechanisms. The grant for E-DCH transmission is the maximum power ratio that the WTRU can use to transmit over the E-DCH. Grants are converted directly to transport block size. In this regard, Grant can be interpreted as the right to create interference on the uplink. In HSUPA, the network communicates grants to each WTRU individually. There are two types of grants transmitted by the network: absolute grants and relative grants. Absolute grant is E-AGCH (E-DCH absolute grant) by serving E-DCH cell It is sent via channel)) and conveys the index for the grant table. Relative grants can be transmitted via E-RGCH (E-DCH relative grant channel) by any cell in the E-DCH active set. The WTRU maintains a serving grant that the WTRU uses to determine how much data can be sent during a given TTI. This serving grant is updated each time a new grant command is received via E-AGCH or E-RGCH.

In addition to the grant mechanism, HSUPA allows non-serving E-DCH cells to switch to E-HICH (E-DCH HARQ indicator channel) whenever the transmitted data is correctly decoded. It also takes advantage of macro-diversity by allowing HARQ ACKs (acknowledgements) to be sent to the WTRU via. Serving E-DCH cells (and non-serving E-DCH cells in the same RLS (radio link set)) are ACK or NACK (negative) via E-HICH each time they receive a HARQ transmission. Reply) is sent.

Downlink control channels specific to HSUPA include E-AGCH, E-RGCH, and E-HICH. Power control using F-DPCH (fractional dedicated physical channel) on the downlink and DPCCH (dedicated physical control channel) on the uplink for proper system operation. The loop is established.

To meet the ever-increasing demand for providing continuous, faster access to data networks, multicarrier systems have been proposed that can use multiple carriers to transmit data. The use of multiple carriers is expanding in both cellular and non-cellular wireless systems. Multicarrier systems can increase the bandwidth available in a wireless communication system by multiplying the number of available carriers. For example, as part of technological development, a new feature called DC-HSDPA (dual-cell HSDPA) was introduced in the 3GPP Release 8 specification. With DC-HSDPA, Node B communicates with the WTRU at the same time via two different downlink carriers. Not only does this double the bandwidth and peak data rate available for WTRU, but it also has the potential to increase network efficiency with fast scheduling and fast channel feedback over two carriers.

DC-HSDPA significantly increases downlink throughput and efficiency in wireless communication systems. The introduction of DC-HSDPA also increases the asymmetry between the uplink and downlink in terms of throughput and peak data rate. However, no suggestions have been made for uplinks. Therefore, it is desirable to provide a method for utilizing multiple uplink carriers in order to increase the peak data rate and transmission efficiency in uplink transmission.

Methods and devices for wireless transmission using multiple uplink carriers are disclosed. The WTRU provides data channels, pilot channels, and control channels for uplink transmission on the primary uplink carrier over the primary uplink carrier, and optionally uplink feedback information related to downlink transmission. The control channel can be transmitted to provide the data channel and the pilot channel can be transmitted via the secondary uplink carrier wave. Alternatively, the WTRU is a data channel, a pilot channel, and a control channel for uplink transmission on the primary uplink carrier over the primary uplink carrier, and optionally the uplink associated with the downlink transmission. Control channels can be transmitted to provide feedback information, and over the secondary uplink carrier, transmit control channels for data channels, pilot channels, and uplink transmissions on the secondary uplink carriers. Can be done.

Each uplink carrier applies the control information received on the downlink carrier to the uplink transmission on the uplink carrier associated with the downlink carrier on which the WTRU received the control information. It can be associated with at least one particular downlink carrier. At least one E-RNTI (radio network temporary) identity)) can be set for each uplink carrier, and the WTRU can apply the received absolute grant to uplink data transmission (eg E-DCH) on the associated uplink carrier. At least one downlink control channel (eg, E-AGCH) carrying uplink grant information can be associated with each uplink carrier, and the WTRU will receive an absolute grant, an absolute grant received, an uplink grant. It can be applied to uplink transmissions on the uplink carrier associated with the downlink control channel that carries the information. A pair of downlink control channels (eg E-RGCH) carrying relative uplink grant information and downlink control channels (eg E-HICH) carrying HARQ feedback information can be associated with each uplink carrier. The WTRU can apply the received relative grant and HARQ feedback to the uplink transmission on the associated uplink carrier.

The WTRU can receive multiple TPC (transmit power control) commands and adjust the transmit power on the uplink carrier based on the corresponding TPC command. TPC commands for an uplink carrier can be received via the downlink carrier associated with that uplink carrier.

A more detailed understanding can be obtained from the following description given as an example, along with the accompanying drawings.<figref num="1">It is a figure which shows an example of a wireless communication system.</figref><figref num="2">It is a functional block diagram of WTRU and node B of the wireless communication system of FIG.</figref><figref num="3">It is a figure which shows an example which WTRU transmits two uplink carriers to UTRAN by one Embodiment.</figref><figref num="4">FIG. 5 shows an example of a WTRU transmitting two uplink carriers to UTRAN according to another embodiment.</figref><figref num="5">It is a functional block diagram in which two uplink carriers are controlled by a TPC (transmit power control) command transmitted to a WTRU on two downlink carriers.</figref><figref num="6">It is a functional block diagram in which two uplink carriers are controlled by a TPC (Transmit Power Control) command transmitted to the WTRU on a single downlink carrier.</figref><figref num="7">It is a functional block diagram in which two uplink carriers are controlled by a TPC (Transmit Power Control) command transmitted to the WTRU on a single downlink carrier.</figref><figref num="8">It is a figure which shows an example of the F-DPCH slot format by one Embodiment.</figref><figref num="9">It is a functional block diagram in which a TPC (transmission power control) command is transmitted by an uplink in a multiple uplink carrier environment.</figref><figref num="10">It is a flow chart of an example of a process for E-TFC selection and MAC-e or MAC-i PDU generation when using two uplink carriers.</figref><figref num="11">It is a figure which shows the scheduling information format by one Embodiment.</figref>

As used herein, the term "WTRU" is used, without limitation, UE (User Equipment), Mobile Station, Fixed or Mobile Subscriber Unit, Pager, Cellular Phone, PDA (Personal Digital Assistant), Computer, Includes M2M (machine-to-machine) devices, sensors, or any other type of device that can operate in a wireless environment. As used herein, the term "node B" includes, without limitation, base stations, site controllers, APs (access points), or any other type of interface device that can operate in a wireless environment. ..

The network can assign at least one downlink carrier and / or at least one uplink carrier as anchor downlink carriers and anchor uplink carriers, respectively. For example, an anchor carrier can be defined as a carrier for carrying a particular set of control information for downlink / uplink transmission. The anchor carrier does not have to be dynamically activated and deactivated. The uplink anchor carrier can be associated with the downlink anchor carrier. Any carrier that is not assigned as an anchor carrier is supplementary carrier). Alternatively, the network may not be assigned an anchor carrier and may not give priority, preference, or default status to any downlink or uplink carrier. For multicarrier operation, there may be more than one auxiliary carrier or auxiliary carrier. From now on, the terms "anchor uplink / downlink carrier" and "primary uplink / downlink carrier" are used interchangeably, "secondary uplink / downlink carrier" and "auxiliary uplink / downlink carrier". The term "" is used interchangeably.

Embodiments for utilizing multiple uplink carriers in the transmission of data and control information in an HSPA system, including various channel structures for the uplink carriers for carrying user data and control information, are disclosed. Although embodiments are described with respect to dual uplink carriers, it should be understood that the embodiments described herein are similarly applicable to a large number of uplink carriers. Embodiments are disclosed with reference to control channels and data channels associated with WCDMA (Broadband Code Division Multiple Access), but the embodiments are LTE (long term evolution) and LTE Advanced (LTE-). Note that it is applicable to any wireless communication technology that currently exists or will be developed in the future, such as Advanced). It should also be noted that the embodiments described herein may be applicable in any order or combination.

Figure 1 shows multiple WTRUs 110, node B 120, CRNC (controlling radio network controller) 130, SRNC (serving radio network controller) 140, and core network 150. An example of a wireless communication system 100 including and is shown. Nodes B 120 and CRNC 130 are sometimes collectively referred to as UTRAN.

As shown in Figure 1, WTRU 110 communicates with node B 120, and node B 120 communicates with CRNC 130 and SRNC 140. Figure 1 shows three WTRU 110s, one node B 120, one CRNC 130, and one SRNC 140, but any combination of wireless and wired devices can be included in the wireless communication system 100. Please note that.

FIG. 2 is a functional block diagram of WTRU 110 and node B 120 of the wireless communication system 100 of FIG. As shown in FIG. 1, the WTRU 110 is configured to communicate with node B 120, both of which perform a method of performing uplink transmissions using multiple uplink carriers. The WTRU 110 includes a processor 115, a receiver 116, a transmit 117, a memory 118, an antenna 119, and other components (not shown) that can be found in a typical WTRU. Memory 118 is provided to store software, including operating systems, applications, and so on. Processor 115 is provided to perform a method of performing uplink transmissions using multiple uplink carriers, either alone or in conjunction with software. The receiver 116 and the transmitter 117 communicate with the processor 115. Receiver 116 and / or transmitter 117 may be capable of receiving and / or transmitting over multiple carriers. Alternatively, multiple receivers or multiple transmitters have WTRU. It may be included in 110. Antenna 119 communicates with both receiver 116 and transmitter 117 to facilitate transmission and reception of wireless data.

Node B 120 includes a processor 125, a receiver 126, a transmitter 127, a memory 128, an antenna 129, and other components (not shown) that can be found in a typical base station. Processor 125 is provided to perform a method of performing uplink transmissions using multiple uplink carriers, either alone or in conjunction with software. The receiver 126 and the transmitter 127 communicate with the processor 125. The receiver 126 and / or the transmitter 127 may be capable of receiving and / or transmitting over multiple carriers. Alternatively, a plurality of receivers or a plurality of transmitters may be included in the node B 120. Antenna 129 communicates with both receiver 126 and transmitter 127 to facilitate transmission and reception of wireless data.

According to one embodiment, the secondary uplink carrier carries traffic data with or without minimal control information. Figure 3 shows an example of a WTRU transmitting two uplink carriers to UTRAN. The WTRU is a data channel (eg, E-DPDCH (E-DCH dedicated physical data channel)), pilot and other control channels (eg, DPCCH, E-) on the anchor uplink carrier. It is possible to transmit DPCCH (E-DCH dedicated physical control channel) and / or HS-DPCCH (HS-DSCH dedicated physical control channel). It can transmit data channels (eg E-DPDCH) and pilot channels on the auxiliary uplink carrier.

Anchor uplink carriers can carry all or most of the uplink control signaling transmitted to the UTRAN, and the uplink control signaling is, without limitation, (1) CQI (channel quality information). ), PCI (precoding control indication), feedback for downlink channels (such as HS-DPDCH), including ACK / NACK HARQ information, (2) uplink pilot symbols, FBI (feedback information) (Feedback information)), and uplink radiolink control information (eg, uplink DPCCH), including TPC (Transmission Power Control) commands, or (3) RSN (retransmission sequence) used for HARQ processing. number)), E-TFCI (E-DCH transport format combination index (E-DCH)) indicating the size of the transport block to be transmitted Contains at least one of the E-DCH control information (eg, E-DPCCH), including the transport format combination index)) information and the happy bit.

A data channel (eg, E-DPDCH) can carry user traffic on the anchor uplink carrier, as shown in FIG.

Auxiliary uplink carriers can carry user data channels (eg, E-DPDCH) and pilot channels. The pilot channel can be a conventional uplink DPCCH that carries TPC (Transmission Power Control) commands in addition to the pilot symbol. The TPC command can be used to control the secondary power control loop between WTRU and UTRAN, which manages the downlink power for the secondary downlink carrier. Alternatively, the pilot channel can have a new slot format for uplink DPCCH, including pilot symbols. For example, all 10 bits of a conventional uplink DPCCH can be used to carry a pilot sequence. Alternatively, the pilot channel can be a new uplink control channel that carries the pilot symbols used by UTRAN to improve the reception of data on the secondary uplink carrier.

E-DCH control information for both data transmitted on the anchor uplink carrier and data transmitted on the auxiliary uplink carrier can be transmitted on the anchor uplink carrier. This E-DCH control information includes control information for both uplink carriers, by defining a new slot format for the E-DPCCH, or on two independent E-DPCCH carriers on the anchor uplink carrier. It can be carried by transmitting channels (one for the anchor uplink carrier and the other for the auxiliary uplink carrier).

According to an alternative embodiment, as shown in FIG. 4, the secondary uplink carrier can also carry the E-DCH control information associated with the transmission of the secondary uplink carrier. The E-DCH control information transmitted on the anchor uplink carrier is related to data transmission on the anchor uplink carrier. To transmit E-DCH control information, a separate E-DPCCH can be transmitted on the secondary uplink carrier in addition to the data and pilot channels (in a manner similar to single carrier operation). Alternatively, a new uplink control channel can be defined that contains both pilot and E-DCH control information. The new uplink control channel may contain uplink pilot symbols, FBI, TPC, RSN used for HARQ processing, E-TFCI information indicating the size of the transport block transmitted, and / or a happy bit. it can. Alternatively, the new uplink control channel can contain pilot symbols, RSN, and / or E-TFCI information.

When the E-DPCCH is transmitted on both the anchor uplink carrier and the auxiliary uplink carrier, the happy bit can be set on both uplink carriers as follows. The happy bit on each uplink carrier can be set according to the respective power headroom state and individual grant of each uplink carrier. Power headroom can be defined as the amount or ratio of power available for transmitting uplink data. Alternatively, the power headroom can be the amount or ratio of power available on the reference uplink transport channel for transmission of other uplink data and control channels. This can be the case, for example, if there is sufficient power headroom to transmit at a higher data rate on the second uplink carrier, or if the grant on the second uplink carrier is lower, then one uplink. This means that the happy bit may be set to "happy" on the carrier, while the happy bit is set to "unhappy" on the second uplink carrier.

Alternatively, the happy bits on one uplink carrier (eg, anchor uplink carrier) can be set according to the combined state of both uplink carriers (grant and power headroom). In this case, (1) the WTRU scheduled data on both uplink carriers during the E-TFC selection for both uplink carriers, the maximum amount allowed by the current serving grant. ), If (2) the WTRU has sufficient power available to transmit at a higher data rate on any or all of the uplink carriers, or (3) Happy Bits. TEBS (total E-DCH buffer status) based on the same power offset selected in the E-TFC selection (for both uplink carriers) to send data during the same TTI as DCH buffer If status)) requires more than Happy_Bit_Delay_Condition ms to be sent using the current serving grant, taking into account the ratio of the active process to the total number of processes on each carrier, then the happy bit is "un". Can be set to "Happy".

If the happy bit on one uplink carrier is set according to the combinatorial state of both uplink carriers, the happy bit on the second uplink carrier can be interpreted by one or a combination of the following:

(1) The happy bit can be set to "happy" if the power headroom on the second uplink carrier is greater than the power headroom on the first uplink carrier, otherwise "happy". Can be set to "Unhappy". This information helps determine on which carrier the network can increase grants. Or (2) Alternatively, the happy bit on the second uplink carrier is determined by taking into account the state of the grant and power headroom exclusively on the second uplink carrier (or exclusively on the first uplink carrier). Can be set by conventional rules for.

All uplink carriers can have the same channel structure, including data channels (eg E-DPDCH) and control channels (eg DPCCH, E-DPCCH, or HS-DPCCH). Each uplink carrier can be paired with the associated downlink carrier. This can be advantageous when the carriers are located in different frequency bands and the radio state can be significantly different between the carriers.

The number of uplink carriers and the number of downlink carriers can be the same. In this case, each uplink carrier can be paired with a downlink carrier. In an example of a case where there are two downlink carriers and two uplink carriers, the downlink carrier 1 has uplink scheduling information (eg E-AGCH, E-RGCH), HARQ feedback (eg E-HICH), Alternatively, it can carry all control information related to uplink carrier 1, including power control commands (eg via F-DPCH). Similarly, the downlink carrier 2 can carry all control information associated with the uplink carrier 2.

Uplink carrier 1 includes downlink channel quality (eg CQI in HS-DPCCH), HARQ feedback (eg ACK / NACK in HS-DPCCH), or power control commands (eg uplink DPCCH). All control information related to can be carried. Similarly, the uplink carrier 2 can carry all control information associated with the downlink carrier 2.

Alternatively, the number of downlink carriers may be greater than the number of uplink carriers. In this case, it is allowed to receive more downlink carriers than are used for uplink transmission. For example, in the case where the WTRU is configured to receive on four downlink carriers at the same time and transmit on two uplink carriers, uplink carrier 1 will be downlink carrier 1 (anchor) and downlink carrier 1. 2 (auxiliary) can be matched and uplink carrier 1 can be downlink channel quality (eg CQI in HS-DPCCH), HARQ feedback (eg ACK / NACK in HS-DPCCH), or power control command (eg up). It can carry any or all of the control information related to downlink carrier 1 and downlink carrier 2, including (link DPCCH) and the like. Uplink carrier 2 can be matched to downlink carrier 3 (anchor) and downlink carrier 4 (auxiliary), and uplink carrier 2 has downlink channel quality (eg CQI in HS-DPCCH), HARQ feedback (eg, CQI in HS-DPCCH). It can carry any or all of the control information related to downlink carrier 3 and downlink carrier 4, including, for example, ACK / NACK in HS-DPCCH, or power control commands (eg, uplink DPCCH).

When using multiple carriers on the uplink, the active set of WTRUs can be changed. The WTRU can independently maintain two active sets, corresponding to each uplink carrier. The WTRU can have an active set that includes an E-DCH radio link on the anchor uplink carrier and another active set that includes an E-DCH radio link on the auxiliary uplink carrier. This allows the network to configure several single cell nodes B and several dual cell nodes B in the same E-DCH active set.

Alternatively, the WTRU can maintain one active set, and each entry in the active set contains a radio link associated with both the anchor uplink carrier and the auxiliary uplink carrier. In this embodiment, the network cannot configure a WTRU with a single E-DCH configuration in some sectors and with dual E-DCHs in some other sectors.

Alternatively, a non-serving cell in the E-DCH active set can contain one carrier radio link, and the serving cell has two radio links (one corresponding to the anchor carrier and one corresponding to the auxiliary carrier). Can include.

Embodiments for providing the signaling required to operate HSUPA over multiple carriers will be described below.

According to one embodiment, each uplink carrier can be associated with a particular downlink carrier for control signaling. Associations can be communicated by the network via RRC (radio resource control) signaling, or can be implicitly known based on a set of predefined rules. For example, if two uplink carriers and two downlink carriers are utilized and an uplink carrier A and a downlink carrier A, and an uplink carrier B and a downlink carrier B are associated, then the WTRU is the downlink carrier A. The E-AGCH, E-RGCH, and E-HICH commands received above can be applied to the serving grant and HARQ processes associated with uplink carrier A. Similarly, the WTRU applies the E-AGCH, E-RGCH, and E-HICH commands received on downlink carrier B to the serving grant and HARQ processes associated with uplink carrier B.

According to another embodiment, the downlink carrier to which the E-AGCH, E-RGCH, or E-HICH commands are transmitted does not have to be directly linked to the uplink carrier to which these commands apply. Grants can only be transmitted on anchor downlink carriers (or, as an alternative, on any of the downlink carriers) and can be applied to any of the uplink carriers.

Embodiments for transmitting absolute grants for multiple uplink carriers will be described below.

According to one embodiment, the network can set up a set of E-RNTIs (E-DCH wireless network temporary identification information) for each uplink carrier wave in the WTRU. Each pair of E-RNTIs (ie, primary E-RNTI and secondary E-RNTI) is associated with a given uplink carrier. Optionally, only the primary E-RNTI can be configured for each uplink carrier. The WTRU monitors the E-AGCH for all configured E-RNTIs, and if one of the configured E-RNTIs is detected, the WTRU decrypts the command carried over the E-AGCH. Applies to the uplink carrier associated with the E-RNTI. The association of E-RNTI with the uplink carrier is valid regardless of the downlink carrier to which the E-AGCH is transmitted.

Alternatively, the network can configure at least one E-AGCH (ie, an E-AGCH channelization code) associated with each uplink carrier. The WTRU monitors all E-AGCHs (ie all configured E-AGCH channelization codes). If the WTRU detects its E-RNTI (primary or secondary) on the configured E-AGCH, it will issue the corresponding command to the uplink carrier associated with the E-AGCH channelization code to which the command was sent. Apply to.

Alternatively, the WTRU can apply the received E-AGCH command to one of the uplink carriers based on the timing. For example, the uplink carrier index to which the command applies is the E-AGCH subframe number and CFN (connection frame number) (or SFN (system frame number) of the received E-AGCH. It can be a function of number))). In addition, in a given subframe, the time offset between the subframe when the E-AGCH command is transmitted and the corresponding subframe of E-DCH transmission may vary depending on the uplink carrier. Good. For example, the time offset can be about 5 subframes for uplink carrier # 1, but can be shortened by 1 subframe (ie, about 4 subframes) for uplink carrier # 2. The time offset can be exchanged every HARQ cycle so that the absolute grant command can handle any HARQ process for both carriers (8 TTIs are 2ms TTIs, 4 TTIs are 10ms). TTI).

Alternatively, in the special case of two uplink carriers, re-absolute grant scope bits carried on the E-AGCH to indicate the uplink carrier to which the accompanying absolute grant command applies. Can be interpreted.

Alternatively, the physical layer format of the E-AGCH can be modified to support more than one uplink absolute grant command. This is a channel to support more information by reducing the absolute grant grain size (from 5 bits to a lower value) and reinterpreting the absolute grant scope bits to carry other information. It can be achieved by changing the coding scheme, or by sharing the absolute grant scope bits among all uplink carriers, or in any combination thereof.

Alternatively, the E-AGCH format can be modified to add additional fields to the absolute grant message to explicitly indicate the uplink carriers to which this absolute grant command is applicable. Depending on the number of carriers in the uplink, this field can be 1 bit for dual cell operation, or 2 bits to support up to 4 carriers.

Alternatively, the WTRU can be provided with a single grant value that applies to the combined transmission on both carriers. The transmitted grant (power ratio) can be converted to a number of bits (or data rate) to the WTRU over both carriers for a higher total number of bits (or higher total data rate). ) Cannot be allowed to be sent. Alternatively, it is not possible to allow the linear sum of the E-DPDCH / DPCCH power ratios of both carriers to exceed the transmitted grant.

The constraints transmitted by this single grant can be combined with other constraints to determine proper sharing between the two carriers. For example, a network can quasi-statically or dynamically propagate maximum grants on either (or both) uplink carriers for interference control purposes. Traditional mechanisms for controlling grants on individual carriers can be used in conjunction with shared grants. In this case, the shared grants can be identified using different E-RNTI values.

Embodiments for transmitting relative grants and HARQ instructions for multiple uplink carriers are described below.

In one embodiment, one pair of E-RGCH and E-HICH (for each radio link) can be configured for each uplink carrier. Different pairs of E-RGCH and E-HICH can share the same channelization code with different signatures, or they can use completely different channelization codes. Each pair is associated with a particular uplink carrier. This association can be communicated via explicit signaling or implicitly known by predefined rules. The E-RGCH and E-HICH are then transmitted over a predefined downlink carrier that is independent of the association with the uplink carrier. For example, all pairs of E-RGCH and E-HICH can be transmitted via the serving HS-DSCH cell (anchor downlink carrier). An E-RGCH can be associated with both uplink carriers, in which case the UP (or DOWN) command raises (or lowers) the grant on both uplink carriers at the same time.

Alternatively, each uplink carrier can be associated with one downlink carrier. The network sets up a pair of E-RGCH and E-HICH (for each radio link) for each uplink carrier, and that pair is transmitted over the associated downlink carrier. The WTRU monitors E-RGCH and E-HICH on each downlink carrier and applies the received command to the associated uplink carrier. For example, when the uplink carrier A is associated with the downlink carrier A, the E-RGCH and E-HICH commands received via the downlink carrier A apply to the uplink carrier A.

The WTRU can receive E-RGCH and E-HICH from the non-serving node B for each uplink carrier. Non-serving node B may not be capable of dual uplink operation, so a separate E-DCH active set may be defined for each uplink carrier. The WTRU can receive non-serving E-RGCH or E-HICH from non-serving node B for at least one of the uplink carriers. For the same reason, a separate active set can be defined for each uplink carrier for power control purposes. In this case, the WTRU can receive TPC commands (on DPDCH or F-DPCH) from node B for one of the uplink carriers.

If parallel control over the uplink carriers is not allowed, the WTRU may not need to maintain a separate active set for each carrier. One active set can be defined and downlink control signaling can be monitored from the active set of downlink anchor carriers.

Due to the overhead associated with auxiliary uplink carriers, it may be desirable to restrict the use of auxiliary carriers, or the use of two uplink carriers at a time, to the WTRU during the burst period. In this regard, uplink resources (ie, auxiliary uplink carriers only, or, as an alternative, both auxiliary uplink carriers and anchor uplink carriers) are assigned to a single WTRU at a time (ie, given). In time, it can be efficient that one WTRU is allowed to transmit on both carriers or on an auxiliary carrier, and all other WTRUs are only allowed to transmit on the anchor carrier). is there.

According to one embodiment, the WTRU can be scheduled or configured to use its grants on the auxiliary uplink carrier or on both uplink carriers for a predefined or set period of time. The WTRU can only transmit on one uplink carrier (anchor uplink carrier or auxiliary uplink carrier), and the scheduler schedules the WTRU on both uplink carriers. This allows the network to minimize signaling when exchanging resources between WTRUs.

Initially, the WTRU is transmitting E-DCH only on the anchor uplink carrier or on the auxiliary uplink carrier (only one uplink carrier can be activated and the other uplink). The link carrier may or may not be activated). If the WTRU has a large amount of data to send, the network can decide to temporarily provide grants on the uplink carrier that is not currently in use. In order to signal the WTRU or trigger the WTRU to initiate transmission on both uplink carriers, the following conditions, namely (1) the WTRU, sends the data (ie E-DCH). Receiving a non-zero grant associated with an uplink carrier that is not currently transmitting, (2) the WTRU has a non-zero grant and at least one active HARQ process on the anchor uplink carrier or auxiliary uplink carrier. Receiving a non-zero grant for an uplink carrier that is not currently transmitting, or (3) the WTRU has a non-zero grant and all HARQ processes activated on the anchor uplink carrier or auxiliary uplink carrier. And one or a combination of receiving non-zero grants for uplink carriers that are not currently transmitting can be used.

A signal can be sent to the WTRU to initiate transmission on another carrier using one or a combination of the following methods: The WTRU can be assigned an E-RNTI (hereafter referred to as the "dual cell E-RNTI"), which is used to instruct the WTRU to start transmitting on both carriers. The WTRU can also have a single cell E-RNTI, or two separate E-RNTIs used for a single cell, one for the anchor and one for the auxiliary. If the E-AGCH is masked with a dual cell E-RNTI, the WTRU initiates transmission on both uplink carriers in the HARQ process corresponding to the given E-AGCH. Grants transmitted with dual-cell E-RNTI on E-AGCH can be used on newly used uplink carriers, and WTRUs are existing serving grants on carriers already transmitted by WTRU. Can be continued using. Alternatively, the grant transmitted with the dual cell E-RNTI on the E-AGCH can be used for both uplink carriers. Alternatively, the grant transmitted with the dual cell E-RNTI on the E-AGCH can be split in half between both uplink carriers.

Alternatively, the absolute grant table can be extended to allow signaling of values higher than the current absolute grant value. If the absolute grant shows a value greater than 30, the WTRU can interpret this as an instruction to initiate transmission on the other uplink carrier. Grants used on both uplink carriers may correspond to AGs split between the uplink carriers. Alternatively, the AG on the new carrier may correspond to the transmitted AG minus the serving grant of the current carrier. Alternatively, the AG index on the new carrier may correspond to the transmitted AG minus 30. Alternatively, the serving grant used for the current carrier can also be used for the new carrier.

Any of the methods described herein can be used to convey a grant on the other carrier (eg, an absolute grant index is transmitted with a new bit indicating the uplink carrier to which the grant is applied. Absolute grant message changes so that you can).

Alternatively, the instruction bit informing the WTRU to start transmission on both carriers can be transmitted on the E-AGCH. Upon receiving a message on the E-AGCH, the WTRU will use the same serving grant as the current uplink carrier, or, as an alternative, the serving grant corresponding to the absolute grant carried on the same E-AGCH as the indicator bit. Can be used to initiate transmission on the other uplink carrier.

Under the above trigger conditions, the absolute grant scope can be set to a specific value ("all" or "single").

If a non-persistent grant is triggered on a carrier that the WTRU is not currently transmitting, the WTRU will synchronize the new uplink carrier if it has not already done so. Synchronization on the new carrier can also include transmission of the DPCCH preamble prior to the start of E-DCH transmission on the new carrier.

The WTRU can also start a non-persistent timer. The non-persistent timer may correspond to a time value or a number of TTIs. This value can be pre-determined by the WTRU or transmitted / set to the WTRU via RRC signaling.

The WTRU initiates an E-DCH transmission using the transmitted non-persistent grant using one of the methods described above. Alternatively, the WTRU can ignore the grant value and use the maximum grant. Alternatively, the WTRU can ignore the value of the transmitted grant and use the maximum value transmitted by the network. Alternatively, the WTRU can use pre-configured non-persistent grants transmitted by the network via RRC signaling or pre-determined by the WTRU.

When the non-persistent timer expires, the serving grant associated with the new uplink carrier takes a value of zero, and / or all HARQ processes associated with the new uplink carrier are deactivated. Therefore, the WTRU stops starting new HARQ transmissions on the new carrier. Optionally, once all HARQ retransmissions on the new carrier have been completed, the WTRU can implicitly deactivate the new carrier. Optionally, the WTRU may transmit the SI after the timer expires, either by piggybacking at the end of the last HARQ transmission allowed by the non-persistent timer, or by itself. The value of the non-persistent timer can be set by the network and can be WTRU or cell specific.

For fast group grant switching, the WTRU can be configured by the network with one dedicated E-RNTI and one shared E-RNTI. The network optionally, with a common offset, to reduce the serving grant to the group of WTRUs to the transmitted or set value (eg zero), or to restore the serving grant to its previous value. Shared E-RNTI can be used. With this feature, the network can use the shared E-RNTI to free an uplink resource in a cell and assign it to a single WTRU, later granting a grant to a group of WTRUs. , You can return to the previous state.

Referring now to FIG. 5, embodiments for performing power control on both uplink carriers 520, 540 (ie, in a dual carrier scenario) and allocating power and data to the uplink carriers are described below. Explained. Although FIGS. 5-7 and 9 show specific channels carried by uplink and downlink carriers, it should be noted that any channel can be carried by such carriers. ..

According to one embodiment, the transmit power of the uplink DPCCH (dedicated physical control channel) transmissions 525, 545 on the uplink carriers 520, 540 is two separate transmissions transmitted by node B. It is controlled by the TPC (Transmission Power Control) command. One TPC command controls the power of the first uplink carrier 520, and the other TPC command controls the power of the second uplink carrier 540. The WTRU changes the power of DPCCH 525, 545 on each uplink carrier 520, 540 based on the corresponding TPC command.

Node B transmits a TPC command for the uplink carrier via F-DPCH560, 580 on the downlink carriers 570, 590 corresponding to the uplink carriers 520, 540, respectively. The mapping between uplink and downlink carriers can be defined in advance. WTRUs generally acquire TPC commands by listening to two channels (eg, F-DPCH) transmitted on two different downlink carriers, but of course different for transmitting such commands. Channels can also be used.

Alternatively, referring here to FIG. 6, the TPC command for the two uplink carriers 520, 540 can use the same downlink carrier 570 (either of the downlink carriers 570 or 590, but in this embodiment down). It can be transmitted over two different channels 562, 564 on (shown as using the link carrier 570). In this embodiment, the WTRU does not need to listen to both downlink carriers 570, 590 in the absence of other activity on at least one of the downlink carriers.

In a further alternative embodiment shown in FIG. 7, the TPC command for the two uplink carriers 520, 540 can use a single downlink carrier 570 (again, one of the downlink carriers 570 or 590 can be used, although In this embodiment, it can be carried through a single channel 562 (eg, F-DPCH) on the downlink carrier 570 (shown as using). FIG. 8 shows an example of the F-DPCH slot format according to this alternative embodiment. The F-DPCH slot format includes two TPC fields per slot, and TPC1 and TCP2 contain power control commands (UP or DOWN) for uplink carrier 1 and uplink carrier 2, respectively.

Referring again to FIG. 7, in another alternative embodiment, the power control command for both uplink carriers is transmitted over a single channel 562, such as the F-DPCH channel. Time-multiplexed. Time multiplexing of power control commands can be achieved in many different ways. The power control command alternates evenly between the uplink carrier 1 520 and the uplink carrier 2 520. For example, the uplink carrier wave targeted by the power control command can be determined as follows.

If (current CFN (connection frame number) + slot number) modulo 2 = 0 then TPC for uplink carrier 1 Else TPC for uplink carrier 2 For example, power control commands for uplink carrier 1520 can be carried in radio slots # 0, 2, 4, 6, 8, 10, 12, and 14, while for uplink carrier 2 540. Power control commands can be carried in radio slots # 1, 3, 5, 7, 9, 11, and 13 or vice versa. Alternatively, the uplink carrier 1520 can be assigned more power control commands than the uplink carrier 2 540. For example, power control commands for uplink carrier 1520 can be carried in radio slots # 0, 1, 3, 4, 6, 7, 9, 10, 12, and 13, while uplink carrier. 2 Power control commands for the 540 can be carried in radio slots # 2, 5, 8, 11, and 14. This alternative form can be used when there is a reason to improve overall efficiency by providing more power control commands. Such a scenario can be, for example, a case where the uplink carrier 1520 carries more physical layer channels than the uplink carrier 2 540.

Synchronization can also be defined on a carrier-by-carrier basis. The WTRU can apply the synchronization procedure separately for both carriers. The WTRU can be allowed to transmit on that carrier, depending on its synchronization status on that carrier. A radio link failure can be declared if synchronization is lost on both carriers.

Still referring to Figure 7, power control commands for both uplink carriers are transmitted over a single channel 562, such as the F-DPCH, and in another alternative scenario, on both uplink carriers. The transmit power of the DPCCH transmit on is controllable in this scenario by a single TPC command transmitted by node B over the F-DPCH. If the TPC command from node B tells it to increase power, then power is increased (eg, equally) on both uplink carriers, and if the TPC command tells it to decrease power, it is on both uplink carriers. Power is reduced (eg equally) at. For example, power control commands can be joint-coded within a single TPC field. N_TPC= 2 and N_TPCAn example of joint coding of the TPC command when = 4 is shown in Table 1, where N_TPCIs the number of bits in the TPC command.

<tables num="1"><img id="000002" he="41" wi="145" file="JP6035366B2_D0001.tif" img-format="tif" img-content="drawing" /></tables>

With reference to FIG. 9, the following embodiments relate to uplink transmission of TPC (transmission power control) commands from the WTRU to node B via the uplink DPCCH for the purpose of downlink power control. The WTRU can send TPC commands over the uplink DPCCH 925 on only one of the uplink carriers (920 in this example). On another uplink carrier (940 in this example), the WTRU should use DTX (discontinuous transmission) instead of transmitting the TPC bits, or a new slot format that does not have a TPC field. Can be done. The TPC command can be derived from the quality measured on the downlink carrier 970 to which the downlink channel such as F-DPCH 975 is transmitted. This approach has the advantage of reducing some interference from the WTRU. The WTRU can transmit uplink DPCCH 925, 945 with only pilot bits used for channel estimation by node B.

Alternatively, the WTRU can send the same TPC command via the uplink DPCCH 925, 945 on both uplink carriers 920, 940. The TPC command can be derived from the quality measured on the downlink carrier 970 to which the F-DPCH 975 is transmitted. Node B can combine the TPC command signals from the two uplink DPCCH 925, 945 to improve the reliability of the TPC signal from the WTRU.

Alternatively, the WTRU can send independent TPC commands via the uplink DPCCH 925, 945 of each uplink carrier 920, 940. In this case, the TPC command transmitted on the uplink carriers 920, 940 is measured from the corresponding downlink carrier (s) (not shown) independent of the downlink carrier on which the F-DPCH 970 is transmitted. It can be derived based on the signal quality obtained. This method has the advantage of providing the network with some additional information about the downlink channel.

Uplink channels 925, 927, 945 on two uplink carriers may not behave the same, so channel quality may vary on one carrier 920 differently than on another carrier 940. possible. It is possible that the channel quality changes on one carrier 920 and does not change on the other carrier 940. In one example, channel quality deteriorates on one uplink carrier 920 and improves channel quality on the other uplink carrier 940. In this case, node B is F-DPCH Has different options for setting the value of the TPC bit on the 975. Node B can set the TPC bit to "up" whenever the quality of one of the carriers 920 or 940 is below the threshold, otherwise it can be set to "down". This option can result in higher power of the uplink DPCCH on the other hand for carriers 920, 940, making channel estimation easier for node B. Alternatively, node B can set the TPC bit to "down" whenever the quality of one of the carriers 920, 940 exceeds the threshold, otherwise it can be set to "up". .. This option can result in the power of the uplink DPCCH 925, 945 being lower than the threshold on one of the carriers 920, 940, so node B can use the information from the other carrier to make this An acceptable channel estimate on the carrier can be derived.

If the average uplink interference (noise rise) level is not the same for both uplink carriers 920, 940, significant channel quality discrepancies can occur between the uplink carriers in the long run. The WTRU can apply an offset to the transmit power of one uplink carrier (eg, 920) as compared to the other uplink carrier (eg, 940). This offset can be transmitted by the network, such as through higher layer signaling (eg, RRC signaling). The network can be offset so that the average signal quality of both uplink carriers 920, 940 is the same or about the same.

The network is such that the SIR (signal-to-interference ratio) of E-DPDCH 927, 947 (including data bits) is approximately the same on both uplink carriers 920, 940, 2 For two uplink carriers 920 and 940, it is possible to define different sets of gain coefficients corresponding to the reference E-TFCI (E-DCH transport format combination index). For example, if the DPCCH SIR of uplink carrier 1 920 averages -22 dB, while the DPCCH SIR of uplink carrier 2 940 averages -19 dB, it is up (if the reference E-TFCI is the same). Setting the reference gain coefficient 3 dB lower for link carrier 2 results in approximately the same E-DPDCH SIR for both uplink carriers 920, 940 and a given E-TFC (uplink carrier). 2 The reference gain coefficient of 940 is actually the uplink carrier 1 It can be set slightly below 3 dB to be below 920, giving a better channel estimate using the uplink carrier 2 940).

Synchronization can be defined on a carrier-by-carrier basis. The WTRU can apply the synchronization procedure separately to both carriers. The WTRU can be allowed to transmit on that carrier, depending on its synchronization status on that carrier. A radio link failure can be declared if synchronization is lost on both carriers.

Still referring to FIG. 9, embodiments for E-TFC constraints and selection are described below. WTRU transmission may be constrained by the maximum allowable transmit power. The maximum allowable transmit power of the WTRU can be the smaller of the transmitted set value and the maximum power allowed by the WTRU design constraints. The maximum allowable transmit power of the WTRU can be set as the total maximum power for both uplink carriers 920, 940 in a given TTI (transmission time interval), or can be carrier-specific. In the latter case, the same maximum power value may be assigned to each uplink carrier 920, 940, or a different maximum power value may be assigned to each uplink carrier 920, 940. This may depend on the particular configuration of the device (eg, the number of WTRU power amplifiers and antennas) and / or network control and configuration. The total maximum transmission power and the maximum transmission power for each carrier wave can be set at the same time.

WTRU behavior and behavior can be quite different in both cases (ie, one total maximum transmit power or the maximum transmit power per independent carrier). Therefore, the WTRU knows whether the network has the total maximum power for both uplink carriers 920, 940 or the carrier-specific maximum power for each uplink carrier 920, 940. The WTRU's power capacity (maximum power per carrier or defined per carrier) so that it can schedule operations and correctly interpret the uplink power headroom reported by WTRU. ) Can be notified to the network. If the power requirements are specified in the standard, the WTRU does not need to communicate these capabilities.

Figure 10 shows E-TFC selection and MAC-i when using two uplink carriers. A flow diagram of an example of Process 1000 for PDU generation is shown. As mentioned above, the specific terms used to refer to carriers are interchangeably used herein, but in HSPA + type systems, the two carriers are the anchor (ie primary) carrier and the auxiliary (ie) carrier. It should be noted that these terms are used for convenience when referring to FIG. 10, sometimes referred to as a secondary) carrier. The WTRU determines if there are two new transmissions (typically N, where N is an integer greater than or equal to 2) transmitted during the next TTI (step 502). If there is one new transmission during the next TTI (for example, one new transmission and one retransmission of the earlier failed transmission), the WTRU will use the uplink carrier for E-TFC selection. Select the carrier for the new transmission) and perform the E-TFC selection procedure for the new transmission, but the supported E-TFCI for the new transmission is after subtracting the power used by the retransmission. Determined (step 516). If there are two new transmissions to be transmitted, the WTRU will be used by the WTRU on each carrier if the WTRU is power limited (ie, grant (scheduled, unscheduled) and given a control channel. It is determined whether the sum of the total powers to be generated exceeds the maximum power allowed by the WTRU, including optionally backoff (step 504). If the power is not limited, process 500 proceeds to step 508. If power is limited, the WTRU performs power allocation between uplink carriers (step 506). Alternatively, the WTRU can proceed to step 506 for power allocation between carriers without checking if it is power limited. When power allocation is performed, the WTRU fills the transport block, one carrier followed by the other, and so on.

WTRU determines which MAC-d flow has the highest priority transmitted data and multiplexing to use based on the HARQ profile of the selected MAC-d flow. list) and determine the power offset (step 508). When determining the highest priority MAC-d flow, the WTRU is configured to have the highest priority MAC-d flow of all MAC-d flows for all carriers. d Flow can be determined. In one alternative embodiment, the WTRU is allowed to transmit on a given carrier for all carriers on which E-TFC selection or selection of the highest priority MAC-d flow is performed. Among the d-flows, the MAC-d flow with the highest priority can be determined. The WTRU performs an uplink carrier selection procedure to select the first uplink carrier to be filled with data among a plurality of uplink carriers (step 510). Note that the carrier selection and MAC-d flow determination steps do not necessarily have to be performed in the order described, but can be performed in any order. WTRU selects E-TFCI or supports maximum payload (ie, a set of supported E-TFCI), residual scheduled grant payload, residual unscheduled grant payload, data availability, and logic. Based on the channel priority, determine the number of bits that can be transmitted on the selected carrier (step 511).

The WTRU generates a MAC-e or MAC-i PDU for E-DCH transmission over the selected carrier wave based on the selected E-TFC (step 512). If it is necessary to send SI (scheduling information) for a selected carrier, the WTRU may first include the SI on this carrier before including any other data. If the WTRU runs out of available space on the selected carrier, or if data overflows from a buffer that is allowed to be transmitted in the TTI, the WTRU has another uplink carrier available. Determine if and if the data is still available (step 514). If the decision is negative, process 500 terminates. If a positive decision, process 500 returns to step 510 (or as an alternative to step 508) to select the E-TFCI for the next carrier.

At this point (in step 508), the WTRU can optionally redetermine the highest priority MAC-d flow with the data to be transmitted. The reselected highest priority MAC-d flow may differ from the MAC-d flow that was initially determined before satisfying the previously selected carrier. If the highest MAC-d flow is newly selected, the WTRU will determine the power offset based on the HARQ profile of the newly selected MAC-d flow and then the maximum supported according to the new power offset. The payload (or set of supported E-TFCs) and the remaining scheduled grant payload can be determined. Alternatively, the WTRU can determine the MAC-d flow priority only once at the beginning of the procedure (eg step 508) and apply the selected HARQ profile and multiplexing list to both carriers. This means that the WTRU will have the maximum supported payloads (or supported E-TFCs and residual scheduled payloads) for both carriers in parallel or at the same time, or according to the E-TFC selection sequence. Implicitly suggests making decisions only when needed. In this case, the WTRU can return to step 510 because of the second selected carrier. Note that Process 500 is also applicable when three or more uplink carriers are utilized.

Details of power allocation, carrier selection, and E-TFC constraints and selection are described below.

The maximum payload supported is the maximum allowed number of bits that can be transmitted based on the power available for any uplink carrier. This is, for example, also referred to as the maximum supported E-TFCI. For example, in an HSPA system, the maximum payload supported, or a set of supported or blocked E-TFCIs, may be determined as part of the E-TFC constraint procedure and depend on the HARQ offset selected. In addition, a set of supported E-TFCIs may also depend on the smallest set of E-TFCIs. Embodiments for determining E-TFC constraints and supported / blocked E-TFCI are described below.

As referred to below, a MAC-d flow can also be a logical channel, a group of logical channels, a data flow, a data stream, or a data service, or any MAC flow, application flow, and so on. All concepts described herein are equally applicable to other data flows. For example, in an HSPA system for E-DCH, each MAC-d flow is associated with a logical channel (eg, there is a one-to-one mapping) and has a priority of 1 to 8 associated with it.

Generally, there are scheduling mechanisms used for uplink and data transmission. Scheduling mechanisms can be defined by quality of service (QoS) requirements and / or the priority of the data stream being transmitted. Depending on the QoS and / or the priority of the data stream, some of the data streams may or may not be multiplexed and allowed to be transmitted together during one TTI. In general, data flows and streams can be grouped by best effort or non-real-time services and guaranteed bit rate services with some stringent delay requirements. Different scheduling mechanisms are used to meet QoS requirements, some are dynamic in nature and some are less dynamic.

In general, wireless systems such as LTE and HSUPA (high speed uplink packet access) operate on a request-permission basis, and WTRU requests permission to send data via uplink feedback. The Node B (eNB) scheduler and / or RNC then determine when and how many WTRUs are allowed to send data. From now on, this is referred to as scheduled mode transmission. For example, in an HSPA system, a request for transmission includes an indication of the amount of data buffered in the WTRU, and the WTRU's available power margin (ie, UPH (UE power headroom)). .. The power available for scheduled transmission is dynamically controlled by node B through absolute and relative grants.

Some data streams with strict delay requirements and guaranteed bitrates, such as VoIP (voice over IP) or signaling radio bearers, or any other service that must meet strict delay requirements. In the case of, the network can guarantee timely delivery of such transmissions through a special scheduling mechanism that is not very dynamic in nature and is configured up to in a pre-scheduled time period and resources. It can allow WTRU to send data from a particular flow up to the data rate. These flows in some systems, for example HSPA, are non-scheduled. It is called flow). In other systems such as LTE, they are sometimes referred to as quasi-persistent scheduling and quasi-persistent flows. Although the embodiments described herein are described for scheduled and unscheduled data, they are equally applicable to other systems that use similar scheduling procedures and distinctions between data flows. Please understand that.

Dynamic scheduling, in which control channels are used to allocate resources for certain transmissions and possible retransmissions, provides full flexibility for optimizing resource allocation. However, it requires control channel capacity. To avoid control channel limitation issues, systems such as LTE can use SPS (semi-persistent scheduling), and systems such as UMTS can use unscheduled transmissions. .. Flows that use dynamic scheduling or dynamic grant-based mechanisms (eg, via physical channel control signaling) are called scheduled transmissions. Data streams that use more quasi-static and periodic allocation of resources are called unscheduled transmissions.

For example, in HSPA, each MAC-d flow is configured to use transmission in scheduled or unscheduled mode, and WTRU independently adjusts the data rate for scheduled or unscheduled flows. .. The maximum data rate for each unscheduled flow is set by the higher layers and generally does not change frequently.

In the E-TFC selection procedure, the WTRU can also determine the residual unscheduled grant payload for each MAC-d flow with an unscheduled grant, which is not scheduled for a given MAC-d flow. It is the number of bits allowed to be transmitted according to the grant, and corresponds to it.

The residual scheduled grant payload in the above procedure is the highest payload that can be sent according to the resources allocated by the network after power allocation to the other channel. For example, network-allocated resources are, in the case of HSPA systems, the serving grant and selected power offset of the corresponding carrier. The serving grant value used to calculate the residual scheduled grant payload for the uplink carrier can be based on the actual serving grant value assigned to the uplink carrier. Alternatively, the residual scheduled grant payload for the primary and / or secondary carrier can be based on a scaled grant or fictitious or virtual grant after the power allocation has been performed. The WTRU can use "virtual" or "fictitious" serving grants or scaled serving grants to determine the remaining scheduled grant payload. The three terms can be used interchangeably and refer to power allocation or power splitting for scheduled transmissions for each carrier. Grant scaling is described below as part of the power allocation scheme. Alternatively, if the WTRU shares one serving grant for both uplink carriers (ie, one serving grant is given for both uplink carriers), the WTRU will up each half of the serving grant. It can be used for linked carrier waves. Alternatively, the WTRU can assume that all serving grants are assigned to one uplink carrier when performing this calculation.

Unscheduled grants can be carrier-specific (eg, the value of a configured unscheduled grant is assigned and set for only one carrier that is allowed unscheduled transmission). The carriers for which unscheduled transmissions are configured / allowed can be pre-determined (eg, unscheduled transmissions can only be allowed on the primary carrier or, as an alternative, on the secondary carrier). Alternatively, such carrier waves can be dynamically constructed by the network. The unscheduled grant value can be carrier independent, in which case the total number is determined for both carriers.

The data flow can be configured to be carrier-specific (eg, the network constitutes a flow and associated carriers to which this flow can be transmitted). If the data flow is carrier-specific, the WTRU can perform the E-TFC selection procedure independently for each carrier. The network can provide unscheduled grants based on the HARQ process belonging to the carrier, or can provide unscheduled grants applicable to the TTI, and the WTRU selects the carrier.

Embodiments for selecting an uplink carrier for initial E-TFC selection are disclosed below. The embodiments for carrier selection described below can be performed alone or in combination with any other embodiment disclosed herein. All procedures that affect the choice of the number of bits transmitted on each uplink carrier and the power used on each uplink carrier depend on which uplink carrier the WTRU first selects and processes.

According to one embodiment, the WTRU can give priority to the anchor carrier and process it first. This may be desirable if unscheduled transmissions are allowed on the anchor carrier. Alternatively, the secondary carrier can be given priority and selected first.

Alternatively, the WTRU can determine the highest priority carrier to minimize cell-to-cell interference, maximize the battery life of the WTRU, and / or provide the most efficient energy per bit transmission. More specifically, the WTRU can select an uplink carrier with the largest calculated carrier power headroom. The WTRU is based on current power headroom measurements for each carrier (eg, UPH (UE power headroom)) (UPH represents the ratio of the maximum WTRU transmit power to the corresponding DPCCH code power), or at least. DPCCH power (P_DPCCHBased on the result of the E-TFC constraint procedure (eg, NRPM (normalized remaining power margin) calculation or residual power for each carrier) that is equivalently converted to a carrier with). You can make a decision. For example, uplink carrier selection can be made with respect to the number of bits (eg, priority can be given to the carrier that provides the larger "maximum supported payload" of the anchor and auxiliary carriers). The maximum payload supported is a payload that is determined based on the residual power of the WTRU (eg, NRPM or other values disclosed below).

Alternatively, the WTRU can give priority to the uplink carrier that provides the WTRU with the largest available grant, which means that the WTRU sends the largest amount of data and probably produces the fewest PDUs. It is possible to improve efficiency and reduce overhead. The WTRU can select a carrier based on the larger of the serving grants (SGa) for the anchor carrier and the serving grants (SGs) for the auxiliary carrier.

Alternatively, the WTRU can provide priority to the carrier that provides the larger "residual scheduled grant payload" of the anchor carrier and the auxiliary carrier. The remaining scheduled grant payload is the available payload that is determined based on the scheduling grant from the network and remains after processing the DCH and HS-DPCCH.

Alternatively, the WTRU can optimize between maximum power and maximum grant. More specifically, the WTRU can select a carrier that allows the largest number of bits to be transmitted. The WTRU is the number of bits that can be transmitted for the anchor carrier and the auxiliary carrier, limited by both power and grant (ie, the "available payload" for the anchor carrier and the "available payload" for the auxiliary carrier). Can be determined and the carrier that provides the highest available payload can be selected. The available payload can be determined as the smaller of the remaining scheduled grant payload and the maximum supported payload.

Optionally, when calculating the available payload, "residual scheduled" for each MAC-d flow that can be multiplexed (or any unscheduled MAC-d flow that can have available data). It is also possible to consider the sum of the "grant payload". More specifically, the available payload is the smaller of (residual scheduled grant payload + SUM (residual unscheduled payload for all allowed unscheduled flows)) and supported maximum payload. Can be determined as. If unscheduled flows are allowed on only one carrier (eg, only on the anchor carrier), the payload available for the anchor carrier is considered.

If unscheduled grants are provided on a carrier-by-carrier basis, or if unscheduled transmissions are allowed on one carrier, the WTRU will use the highest priority unscheduled MAC-d flow transmitted during that TTI. Priority can be given to carriers that contain or allow unscheduled MAC-d flows. For example, if unscheduled transmission is allowed only on the primary carrier, and for a given HARQ process, the WTRU is configured to have unscheduled data and the data is available, the WTRU gives priority to the primary carrier. (Ie, it can fill the primary carrier first). Allows the highest priority MAC-d flow to not correspond to the unscheduled flow in a given TTI, but the unscheduled flow to be multiplexed with the selected highest priority MAC-d flow. If so, the WTRU can still give priority to carriers that allow unscheduled transmissions. Therefore, in the current TTI, if any unscheduled flow is allowed to be transmitted and unscheduled data is available, the WTRU can first fill the carrier that allows the transmission of unscheduled flows. The WTRU fills the selected carrier with unscheduled or scheduled data up to the available power and / or grant according to the configured logical channel priority. The remaining carriers (s) are then filled, if data, power, and grants are available for the remaining carriers.

Alternatively, the WTRU can make a decision to select a carrier based on one or a combination of CPICH measurements and HARQ error rates on each carrier.

Examples of embodiments for E-TFC selection for independent maximum power limits are described below. The WTRU can have different transmit powers and maximum permissible powers for each carrier, which may depend on the particular device configuration or design. It depends on the implementation design (eg, the WTRU can be designed to have two different power amplifiers and two different antennas), and / or network control and configuration. It is also applicable if the WTRU pre-allocates power between carriers or allocates power in parallel, as described below. In these situations, the maximum or available power available for each carrier corresponds to the power allocated for each carrier. The embodiment is also applicable when power is shared between carriers, but power is allocated or scaled between carriers before filling the carrier.

The fact that the delivery order of RLC PDUs must be maintained to allow proper operation of the higher layers if power is pre-allocated or the maximum amount of power is independent for each carrier. Therefore, the MAC PDUs may have to be filled in sequence. In addition, the WTRU may be buffer limited, in which case sufficient data may be available to transmit over one carrier.

In this situation, the WTRU may first select the highest priority carrier P1 based on one of the embodiments described above. For example, a WTRU can fill a carrier with larger power headroom with data first, choosing a carrier with equivalently smaller DPCCH power, or fill the primary or secondary carrier first. it can. This is the highest priority data, such as over a carrier with the best channel quality or unscheduled transmission, for most or the highest priority data, even for buffered WTRUs. Allows transmission over a carrier wave.

According to the highest priority MAC-d flow, associated HARQ profile, and multiplexing list, the WTRU was then selected as "Maximum supported payload p1", "Residual scheduled grant payload p1", and If allowed and configured on carrier P1, fill the available space on the transport block of carrier p1 (ie, MAC-e or transmitted on carrier p1), depending on the remaining unscheduled grant payload. Generate MAC-i). As mentioned earlier, this corresponds to the number of bits that can be transmitted according to the permissible power, the permissible scheduled grant, and the permissible non-serving grant, respectively. In this situation, the permissible power and permissible grant can correspond to the scaled value of the power and / or grant of each carrier, or of the configured power or grant. This can be done if the power or grant is potentially split between the two carriers or is allocated in parallel. If the SI needs to be transmitted, the WTRU can transmit the SI on carrier p1 or instead, transmit the SI on a carrier that is configured to transmit the SI.

When the WTRU runs out of available space on carrier p1, it then fills the next carrier. At this point, the WTRU can redetermine the highest priority MAC-d flow that has the data to be transmitted and is allowed on the carrier to be processed. At this point, the highest priority MAC-d flow may differ from the MAC-d flow that was initially determined before carrier p1 was filled.

When determining the highest priority MAC-d flow, the WTRU is configured to have the highest priority MAC-d flow of all MAC-d flows for all carriers. d Flow can be determined. In one alternative embodiment, the WTRU is allowed to transmit on a given carrier for all carriers on which E-TFC selection or highest priority MAC-d flow selection is performed. Among the flows, the MAC-d flow with the highest priority can be determined.

When determining the highest priority MAC-d flow, if the carrier on which the E-TFC selection is performed does not allow a type of MAC-d flow, the WTRU will transmit on the given carrier. Unable to consider unauthorized MAC-d flows. For example, if the WTRU performs an E-TFC selection for a second carrier, the WTRU may not include unscheduled MAC-d flows in the selection of the highest priority MAC-d flow. Therefore, if an unscheduled MAC-d flow has available data and has the highest configured MAC-d priority, WTRU considers this MAC-d flow as the highest priority MAC-d flow. It cannot be used, and during the TTI for that carrier, HARQ profiles, power offsets and HARQ retransmissions, and multiplexing lists cannot be used. As a specific example, for HSPA Dual Carrier UL, when processing a second carrier, the WTRU should determine the highest priority MAC-d flow of all scheduled MAC-d flows. Can be done.

Once the highest MAC-d flow is determined, the WTRU will be able to multiplex in this TTI based on the HARQ profile of the selected MAC-d flow used for the new carrier. d Determine the flow and power offset. The WTRU can then determine the maximum supported payload and the remaining scheduled grant payload according to the new power offset and, if available data, can fill the carrier accordingly.

Alternatively, the WTRU can determine the maximum supported payload and the remaining scheduled payload for both carriers at the beginning of the E-TFC selection procedure or before the carrier is filled, which the WTRU can do. Implicitly suggests that the same power offset can be used for both carriers, regardless of whether the data from that first selected highest MAC-d flow is transmitted on both carriers. In this case, the multiplexing list remains the same on both carriers and can be a limiting factor if sufficient data is not available from those logical channels, but the WTRU sends on the other logical channels. Has more power and grants available for.

As soon as carrier p1 (which can be determined and filled as described above) is filled with data, the WTRU immediately moves to the other carrier and continues to fill it with data.

Alternatively, the carriers can be filled in parallel, which implies that data from all acceptable logical channels will be split between the two carriers. Data or RLC buffers must be split to avoid out-of-order delivery. For example, if 10 RLC PDUs with SN0 to SN9 are available, 0 to 4 of the RLC PDU will be sent to carrier 1 and 5 to 9 will be sent to carrier 2. Then, if space still remains, the WTRU moves to the next logical channel and the buffer is split again in the same way.

Alternatively, E-TFC and carrier filling can be performed in parallel, but each carrier gets data from different logical channels. This implies that the WTRU selects the two highest priority MAC-d flows, determines the HARQ profile for each and the multiplexing list for each, and maps them to the two individual carriers. Suggest to. This allows WTRUs to fill in parallel and perform E-TFC without the risk of causing out-of-order RLC delivery. However, this can lead to situations where the WTRU can no longer transmit such data because the carrier is full while the data from the highest logical channel is still available.

In another embodiment, the data flow can be carrier-specific. In this case, the WTRU can perform the E-TFC selection procedure independently for each carrier.

Examples of embodiments for E-TFC selection with respect to the total combined maximum power limit are described below. Some aspects of this embodiment make it applicable as described above if power is allocated in parallel between two carriers or if some form of dynamic power allocation is performed. You can also.

In a sequential approach, if the WTRU maximum power is shared between both carriers, the WTRU will use one of the embodiments described above to be the highest priority carrier (P1). Can be selected first. E-TFC constraints and selections can still be performed sequentially, and the available power and used grants are equal to the allocated or scaled powers or grants.

When the highest priority carrier is selected, the WTRU performs an E-TFC selection and constraint procedure, the highest priority MAC-d flow is selected, the power offset, the maximum payload p1 supported is determined, and According to the serving grant of carrier P1, the available scheduled payload is selected and the available unscheduled payload is selected. If the SI needs to be transmitted, the SI can be processed with the originally selected carrier, or instead, can be processed on a carrier that is allowed to transmit the SI. In this case, the WTRU can perform sequential E-TFC constraint procedures as described above, and the WTRU assumes that all power is available for use by carrier P1. , Suppose no data is transmitted on the secondary carrier. The WTRU is MAC-e or MAC-i transmitted on this carrier, depending on the E-TFC selection. Generate a PDU. Alternatively, if the SI is transmitted on only one carrier (ie, only the anchor carrier), the E-TFC selection will take that into account when performing the E-TFC on the carrier on which the SI is transmitted.

The maximum supported payload (ie, E-TFC constraint) for the selected carrier can be determined, for example, according to the NRPM calculation. If the WTRU has retransmissions on carrier x, no E-TFC selection is performed on carrier x. The WTRU performs an E-TFC selection and produces a MAC-i or MAC-e PDU for the remaining carrier, carrier y.

The WTRU must then generate a MAC-e or MAC-i PDU for the remaining carriers. At this point, the WTRU determines the highest priority MAC-d flow with the data to be transmitted, and the power offset, based on the HARQ profile of the selected MAC-d flow and the multiplexed list of MAC-d flows. It can be redetermined (or only determined if retransmissions are in progress on carrier x). Alternatively, the WTRU uses the same power offset that was initially determined in the procedure.

The WTRU then performs an E-TFC constraint procedure on this second carrier. The WTRU can take into account the power used on the first carrier and the remaining available power when calculating the maximum payload supported or when determining a set of supported E-TFCIs. used. Alternatively, the WTRU may for a second carrier (ie, the second selected carrier) when two new transmissions are made, or when one new transmission is made due to HARQ retransmissions on the other carrier. Before executing the E-TFC constraint, the "backoff power" (ie, the specific power loss experienced when the WTRU makes transmissions on two carriers in the same TTI) can be subtracted. In these embodiments described herein, the WTRU can be configured not to transmit DPCCH if it is determined that it does not need to transmit data. The WTRU can also be configured not to transmit any data on the second carrier if it does not have enough power when the maximum power is allocated per carrier. For example, if one of the carriers does not have enough power, the WTRU will use one carrier (the carrier with the largest UPH or the largest NRPM) instead of using the smallest set of E-TFCIs. Transmission can, or instead, the WTRU cannot transmit on one of the carriers if both do not have sufficient power. The WTRU can use a minimum set on one of the carriers and cannot transmit on the second carrier.

The MAC-i or MAC-e PDU is then determined according to the maximum supported payload determined, the available scheduled payload (according to the serving grant of this carrier), and, where appropriate, the available unscheduled payload. It is filled.

In another embodiment, the WTRU has the same transmit power (on all UL channels, i.e. DPCCH, E-DPCCH, HS-DPCCH, E-DPDCH) on each carrier, or between the two. E-TFC can be selected for each carrier in such a way that the difference is less than the preset maximum. This is done, for example, by calculating which E-TFCs can transmit on each carrier for a given transmit power level given the transmit power of DPCCH and other channels on each carrier. , Can be achieved. For example, assuming that the DPCCH power levels are, for example, 7 dBm and 10 dBm on carriers 1 and 2, respectively, and the power levels of HS-DPCCH and E-DPCCH are each -3 dB below the power level of DPCCH, on each carrier. If the transmit power level is 18 dBm, the power headroom on each carrier is 8 dB and 5 dB, respectively, and the corresponding E-TFC sizes can be 600 bits and 300 bits. Therefore, the WTRU can transmit on both carriers with equal power (18 dBm) by selecting a 600-bit E-TFC on carrier 1 and a 300-bit E-TFC on carrier 2. it can.

This principle can be applied to different cases. If the WTRU transmission is limited by the maximum UL power, the WTRU divides the maximum UL power equally between the two carriers (thus, the UL power available on each carrier is 3 dB below the maximum) and is disclosed above. The E-TFC can be selected for each carrier by determining the maximum E-TFC supported for each carrier using the above method. If the WTRU transmission is limited by the amount of data in the WTRU buffer, the WTRU will make sure that the amount of data that can be transmitted using the resulting E-TFC on each carrier matches the amount of data in the buffer. The transmission power level of the carrier wave can be obtained.

In another embodiment, the WTRU can select the E-TFC on each carrier in such a way that the interfering loads on each carrier are the same or nearly the same. The interfering load on the carrier can be estimated, for example, as the power ratio of E-DPDCH power to DPCCH power, which corresponds to the power ratio used for scheduling. Therefore, if scheduling grants and power headroom are sufficient on both carriers, the WTRU also divides this number of bytes by 2 by determining how many bytes can be sent from the WTRU buffer based on the grant. Select E-TFC on each carrier by applying the appropriate MAC header to determine the required E-TFC size on each carrier.

This method uses the same power ratio on each carrier if the mapping between the reference power ratio and the reference E-TFC is the same between the carriers and if all the data belong to a logical channel with the same HARQ offset. Bring. If the data belong to a logical channel that does not necessarily all have the same HARQ offset, the WTRU must find out which share of the bytes results in the same power ratio for both E-TFCs.

Embodiments of dual carrier power backoff and maximum power constraints for multicarrier operation are disclosed below. WTRU Power Amplifiers To reduce power amplifier design and power consumption, WTRUs are generally tolerant of constant MPR (maximum power reduction). This power reduction margin allows the WTRU implementation to reduce the maximum transmit power (also known as power backoff) to avoid causing unintended adjacent carrier interference due to the non-linearity of the power amplifier.

According to one embodiment, power backoff can be applied when transmitting on two uplink carriers instead of one. The WTRU determines the amount of data transmitted on both carriers according to any of the embodiments described herein, and if the data is transmitted on two carriers, power backoff (ie, power backoff). Total transmission power or reduction of transmission power per carrier) can be applied. In that case, the application of power backoff results in the use of smaller E-TFCI on each carrier. The WTRU decides whether to use a single carrier without power backoff or two carriers with power backoff to allow more data to be transmitted. And you can choose the option that allows you to send the highest total number of bits.

The SI (Scheduling Information) can be modified so that it provides UL power headroom measurements for each carrier individually. More specifically, the SI format can be extended to include the UPH for the auxiliary carrier, as shown in FIG. 11, where UPH1 and UPH2 correspond to the maximum WTRU transmit power and the corresponding anchor DPCCH code. It corresponds to the power ratio and the ratio of the maximum WTRU transmit power to the corresponding auxiliary DPCCH code power, respectively.

Alternatively, the WTRU can report one UPH measurement and node B can infer the UPH of the other carrier based on the noise generation difference between the carriers.

Alternatively, a single UPH can be calculated and reported as follows,

<maths num="1"><img id="000003" he="11" wi="77" file="JP6035366B2_D0001.tif" img-format="tif" img-content="drawing" /></maths>Where P_{max, tx}Is the total maximum output power that can be transmitted by the WTRU, P_DPCCH1And P_DPCCH2Represents the transmission code power of carrier 1 and carrier 2 on the DPCCH, respectively. If the maximum transmission power for each carrier is set, P_{max, tx}Represents the sum of the maximum transmission powers for each carrier.

Alternatively, the scheduling information format remains unchanged, but the WTRU can report SI individually on each carrier. For example, if the SI is transmitted on the anchor carrier, the SI reports the UPH of the anchor carrier, and if the SI is transmitted on the auxiliary carrier, the SI reports the UPH of the auxiliary carrier.

(Embodiment) 1. A method for wireless communication using multiple uplink and multiple downlink carriers.

2. The method of embodiment 1, wherein the WTRU comprises the step of receiving control information via at least one of the downlink carriers.

3. The method of embodiment 2, wherein the WTRU comprises the step of transmitting at least one of data or control information over multiple uplink carriers.

4. The WTRU transmits the first data channel, the first pilot channel, and the first control channel for uplink transmission transmitted on both uplink carriers over the primary uplink carrier. , The method of any of embodiments 2-3, wherein a second data channel and a second pilot channel are transmitted over a secondary uplink carrier.

5. The WTRU transmits the first data channel, the first pilot channel, and the first control channel for uplink transmission transmitted over the primary uplink carrier over the primary uplink carrier. Embodiments 2-3, which transmit a second data channel, a second pilot channel, and a second control channel for uplink transmission transmitted on the secondary uplink carrier via the secondary uplink carrier. The method described in any of.

6. The method of embodiment 5, wherein the WTRU transmits a third control channel over the primary carrier to provide uplink feedback information related to downlink transmission.

7. The method of embodiment 6, wherein the third control channel carries feedback on multiple downlink carriers.

8. The first data channel and the second data channel contain the E-DPDCH, the first pilot channel and the second pilot channel contain the DPCCH, the first control channel and the second control channel , E-DPCCH, the method according to any of embodiments 4-7.

9. The method according to any of embodiments 6-8, wherein the third control channel comprises HS-DPCCH.

10. The WTRU maintains an independent active set for each uplink carrier, the active set of any of embodiments 2-9, comprising a set of radio links over which the WTRU communicates over the uplink. The method described in.

11. Each uplink carrier so that the WTRU applies the control information received on the downlink carrier to the uplink transmission on the uplink carrier associated with the downlink carrier for which the WTRU received the control information. Is the method according to any of embodiments 3-10, associated with at least one particular downlink carrier.

12. Any of embodiments 3-11, wherein at least one E-RNTI is set for each uplink carrier and the WTRU applies the received absolute grant to E-DCH transmission on the associated uplink carrier. The method described in the carrier wave.

13. At least one E-AGCH is associated with each uplink carrier, and the WTRU sends the received absolute grant to the E-DCH transmission on the uplink carrier associated with the E-AGCH for which the absolute grant was received. The method according to any one of Embodiments 3 to 12, which is applied to.

14. A pair of E-RGCH and E-HICH is associated with each uplink carrier and the WTRU applies the received relative grant and HARQ feedback to E-DCH transmission on the associated uplink carrier. , The method according to any one of embodiments 3 to 13.

15. The method of any of embodiments 3-14, wherein the WTRU further comprises the step of receiving a plurality of TPC commands, each of which is intended for transmission power control over a particular uplink carrier. ..

16. The method of embodiment 15, wherein the WTRU comprises adjusting the transmit power on the uplink carrier based on the corresponding TPC command.

17. The method of any of embodiments 15-16, wherein the TPC command for an uplink carrier is received via the downlink carrier associated with that uplink carrier.

18. The step in which the WTRU sends an independent TPC command over each uplink DPCCH of the uplink carrier, the TPC command is derived from the corresponding downlink carrier based on the signal quality measured independently. The method according to any of embodiments 15-17, further comprising steps.

19. WTRU for wireless transmission using multiple uplink and multiple downlink carriers.

20. WTRU according to embodiment 19, wherein the transmitter is configured to transmit over a plurality of uplink carriers.

21. The WTRU according to any of embodiments 19-20, comprising a receiver configured to receive over a plurality of downlink carriers.

22. Embodiments comprising a processor configured to receive control information via at least one of the downlink carriers and transmit at least one of the data or control information over a plurality of uplink carriers. WTRU described in 21.

23. The processor transmits the first data channel, the first pilot channel, and the first control channel for uplink transmission on both uplink carriers over the primary uplink carrier, and the secondary. WTRU according to embodiment 22, which is configured to transmit a second data channel and a second pilot channel over an uplink carrier.

24. The processor transmits the first data channel, the first pilot channel, and the first control channel for uplink transmission transmitted over the primary uplink carrier over the primary uplink carrier. It is configured to transmit a second data channel, a second pilot channel, and a second control channel for uplink transmission transmitted over the secondary uplink carrier over the secondary uplink carrier. WTRU according to any of embodiments 22-23.

25. Described in any of embodiments 23-24, wherein the processor is configured to transmit a third control channel for providing uplink feedback information related to downlink transmission over the primary carrier. WTRU.

26. WTRU according to embodiment 25, wherein the third control channel carries feedback on multiple downlink carriers.

27. The first data channel and the second data channel contain the E-DPDCH, the first pilot channel and the second pilot channel contain the DPCCH, the first control channel and the second control channel , WTRU according to any of embodiments 23-26, comprising E-DPCCH.

28. The WTRU according to embodiment 25, wherein the third control channel comprises HS-DPCCH.

29. The processor is configured to maintain an independent active set for each uplink carrier, the active set comprising a set of radio links over which the WTRU communicates over the uplink. WTRU described in any of 28.

30. Each uplink carrier is associated with at least one particular downlink carrier, and the processor associates the control information received on the downlink carrier with the downlink carrier on which the processor receives the control information. WTRU according to any of embodiments 22-29, configured to apply for uplink transmission on a linked carrier.

31. An embodiment in which at least one E-RNTI is configured for each uplink carrier and the processor is configured to apply the received absolute grant to E-DCH transmission on the associated uplink carrier. WTRU described in any of 22 to 30.

32. At least one E-AGCH is associated with each uplink carrier and the processor transmits the received absolute grant on the uplink carrier associated with the E-AGCH for which the absolute grant was received. WTRU according to any of embodiments 22-31, configured to apply to.

33. A pair of E-RGCH and E-HICH is associated with each uplink carrier and the processor applies the received relative grant and HARQ feedback to E-DCH transmission on the associated uplink carrier. WTRU according to any of embodiments 22-32, configured as such.

34. The processor receives multiple TPC commands, each TPC command intended for transmission power control for a particular uplink carrier, and based on the corresponding TPC command, the transmit power on the uplink carrier. WTRU according to any of embodiments 22-33, configured to be tuned.

35. The WTRU of embodiment 34, wherein the TPC command for an uplink carrier is received via the downlink carrier associated with that uplink carrier.

36. The processor is configured to transmit independent TPC commands derived from the corresponding downlink carrier based on the measured signal quality on each uplink DPCCH of the uplink carrier. The WTRU according to any of forms 22-35.

Although functions and elements have been described above in specific combinations, each function or element may be used alone without other functions and elements, or in various combinations with or without other functions and elements. Can be used. The methods and flowcharts provided herein can be implemented in computer programs, software, or firmware contained within a computer-readable storage medium for execution by a general purpose computer or processor. Examples of computer-readable storage media include ROM (read-only memory), RAM (random access memory), registers, cache memory, semiconductor memory devices, magnetic media such as internal hard disks and removable disks, optical magnetic media, and CD-ROMs. Includes optical media such as discs and DVDs (digital versatile discs).

Suitable processors are, for example, general purpose processors, dedicated processors, conventional processors, DSPs (digital signal processors), multiple microprocessors, one or more microprocessors that work with DSP cores, controllers, microcontrollers, ASICs (specific). Includes application-specific integrated circuits), FPGAs (field programmable gate arrays) circuits, any other type of IC (integrated circuits), and / or state machines.

The processor that works with the software implements a radio frequency transceiver for use with WTRUs (wireless transceiver units), UEs (user equipment), terminals, base stations, RNCs (wireless network controllers), or any host computer. Can be used for. WTRU includes cameras, camcorder modules, videophones, speakerphones, vibration devices, speakers, microphones, TV transceivers, hands-free headsets, keyboards, Bluetooth® modules, FM (frequency modulation) radio units, LCDs (LCDs). Display) Display Units, OLED (Organic Luminous Diode) Display Units, Digital Music Players, Media Players, Video Game Player Modules, Internet Browsers, and / or Any WLAN (Wireless Local Area Network) or UWB (Ultra Broadband) Modules, etc. Can be used in conjunction with modules implemented in hardware and / or software.