WO2012155701A1

WO2012155701A1 - Method and terminal for sending feedback information

Info

Publication number: WO2012155701A1
Application number: PCT/CN2012/073235
Authority: WO
Inventors: 戴博; 梁春丽; 张禹强; 夏树强
Original assignee: 中兴通讯股份有限公司
Priority date: 2011-08-12
Filing date: 2012-03-29
Publication date: 2012-11-22
Also published as: CN102355339A; CN102355339B

Abstract

A method and terminal for sending feedback information, for improving system throughput, the method comprising: a terminal configured with multiple component carriers receiving configuration information sent by an eNodeB, the configuration information allows the terminal to send multiple physical uplink control channels (PUCCHs) in the same subframe; and when sending the feedback information in the uplink, the terminal sending the PUCCH carrying the feedback information in one uplink subframe. The terminal is a terminal configured with multiple component carriers, comprising a receiving module and a sending module. Through the method proposed in the embodiment of the present invention for feeding back multiple pieces of acknowledgement feedback information on a PUCCH under a scenario supporting a large bandwidth carrier aggregation, the capability of feeding back control information bits on an uplink control channel for a LTE-A evolving system is improved, the number of bits in feedback is increased, and the resource utilization rate is enhanced, thus improving system throughput.

Description

Method and terminal for transmitting feedback information

Technical field

The present invention relates to the field of communications, and in particular, to a method and a terminal for transmitting feedback information using carrier aggregation technology.

Background technique

In the Hybrid Automatic Repeat Request ( HARQ) mode, the codeword sent by the originator can not only detect errors but also have certain error correction capability. After receiving the codeword, the receiver decoder first checks the error condition. If the error correction capability of the codeword is within, the error correction is automatically performed. If there are many errors, the error correction capability of the codeword is exceeded, but the error can be detected. Then, the receiving end sends a decision signal to the sending end through the feedback channel, and requests the originating end to resend the information. In the Orthogonal Frequency Division Multiplex (OFDM) system, the HARQ Acknowledgement ( HARQ Acknowledgement) is fed back to the base station to determine whether retransmission is needed, and when the HARQ is fed back to the base station. When the ACK response message is ACK, it indicates that the receiving end receives correctly, and when the HARQ-ACK response message fed back to the base station is NACK, it indicates that the receiving end receives an error, and the base station needs to perform retransmission.

In the system of Long Term Evolution (LTE, Long Term Evolution, which corresponds to the Rel-8/9), the HARQ-ACK response message can be separately sent on the Physical Uplink Control Channel (PUCCH). It can be transmitted with data on a physical uplink shared channel (PUSCH: Physical Uplink Shared Channel).

In a Time Division Duplex (TDD) system, the uplink/downlink subframes are not—corresponding, that is, the ACK/NACK response messages corresponding to multiple downlink subframes need to be in one uplink subframe PUCCH/ The PUSCH channel is sent, where the downlink subframe set corresponding to the uplink subframe forms a bundling window.

In LTE TDD, two HARQ-ACK feedback modes are defined: one is HARQ-ACK bundling, and the basic idea of the feedback mode is to use the downlink subframes that need to be fed back in the uplink subframe. The HARQ-ACK message of the corresponding codeword stream is logically ANDed. If the PDSCH transmission of one downlink subframe includes two codeword streams, as shown in FIG. 1a, the UE (user equipment, or terminal) feeds back the logical logic and operation corresponding to each codeword stream. The HARQ-ACK response message of the bit, if there is only one codeword stream in the PDSCH transmission of each subframe, as shown in FIG. 1b, the UE feeds back the 1-bit HARQ corresponding to the codeword stream through the logical operation of the subframe. - ACK response message, when the UE has no PUSCH to transmit in the current subframe, the UE will transmit the 1/2 bit HARQ-ACK response message in the format la/lb on the PUCCH; and when the UE has the current subframe When the PUSCH is transmitted, the UE multiplexes the 1/2 bit information through a certain channel coding, channel interleaving, and data, and then transmits the information on the PUSCH.

The other is a HARQ-ACK multiplexing feedback mode. As shown in FIG. 2, the feedback mode needs to feed back one HARQ-ACK response message for each downlink subframe, and multiple subframes need to feed back multiple A HARQ-ACK response message, and when a PDSCH transmission of a downlink subframe includes two codeword streams, logically AND operation is performed on the HARQ-ACK response message of each codeword stream, and finally each downlink subframe corresponds to only one HARQ-ACK response message. When the UE has no PUSCH to transmit in the current subframe, the UE transmits the multiple HARQs on the PUCCH by using a feedback mode of the format lb with channel selection (hereinafter referred to as channel selection feedback mode). ACK response message, the core idea of the method is to use different PUCCH channels and different modulation symbols on the channel to represent different HARQ-ACK response messages. The method enables a portable HARQ-ACK response message to be up to 4 bits by channel selection in combination with the control channel format lb.

In order to satisfy the International Telecommunication Union (International Telecommunication Union)

The requirements of Union-Advanced (referred to as ITU-Advanced), as the evolutionary standard of LTE, the Long Term Evolution Advanced (LTE-A, the corresponding standard protocol is Rel-10), the system needs to support larger System bandwidth (up to 100MHz) and requires backward compatibility with existing LTE standards. Based on the existing LTE system, the bandwidth of the LTE system can be combined to obtain a larger bandwidth. This technology is called Carrier Aggregation (CA) technology, which can improve the IMT-Advance system. The spectrum utilization, mitigation of spectrum resources shortage, and optimize the utilization of spectrum resources.

In a system in which carrier aggregation is introduced, a carrier to be aggregated is called a component carrier (CC), which is also called a serving cell. At the same time, The concept of a primary component carrier/cell (PCC/PCell) and a secondary component carrier/cell (SCC/SCell) is used in a carrier aggregation system. There is at least one primary serving cell and a secondary serving cell, wherein the primary serving cell is always active.

When the LTE-A uses the carrier aggregation technology, when the base station configures multiple downlink service cells for the UE, the UE needs to feed back the HARQ-ACK response messages of the corresponding codeword streams of the multiple downlink serving cells. In LTE-A, when the HARQ-ACK response message is sent on the physical uplink control channel, two feedback modes are defined: channel selection feedback mode and DFT-s-OFDM based feedback mode. Since the channel structure based on DFT-s-OFDM is different from PUCCH format l/la/lb/2/2a/2b, in the existing LTE-A protocol, this structure is called PUCCH format 3 ( PUCCH format 3), as shown in Figure 3. The physical uplink control channel of the existing PUCCH format 3 structure can support up to 20 bits of transmission. Although the PUCCH format 3 can fully carry the feedback information when the feedback information is less than 20 bits, the subsequent evolution technology of the LTE-A will support more carrier aggregation, especially for the TDD system, the bearer feedback information bits. The number will be much larger than 20 bits. This will inevitably result in certain binding operations to reduce the amount of feedback and reduce system throughput. Summary of the invention

The problem to be solved by the embodiments of the present invention is to provide a method and a terminal for transmitting feedback information, thereby improving system throughput.

To solve the above technical problem, an embodiment of the present invention provides a method for sending feedback information, including:

The terminal configured with multiple component carriers receives configuration information sent by the base station to allow the terminal to send multiple physical uplink control channels (PUCCHs) in the same subframe;

The terminal sends a PUCCH carrying feedback information on an uplink subframe.

Optionally, the feedback information includes: response information;

The method further includes: determining, by the terminal, a component carrier group according to the configured component carrier, where the terminal transmitting the PUCCH carrying the feedback information in an uplink subframe, including: the terminal according to the grouping of component carriers, All response information of the group component carrier is carried in On the same PUCCH, transmission in an uplink sub-frame carrying the one or more response information PUCCH ₀

Optionally, the feedback information includes: channel state information (CSI);

Transmitting, by the terminal, the PUCCH carrying the feedback information on an uplink subframe, the method includes: the terminal transmitting the CSI of each component carrier on one PUCCH, and transmitting one or more PUCCHs carrying the CSI in one uplink subframe .

Optionally, the feedback information includes: scheduling request (SR) information;

The transmitting, by the terminal, the PUCCH carrying the feedback information in an uplink subframe, the method includes: the terminal transmitting, by using one PUCHCH, the PUCCH carrying the SR information in an uplink subframe.

Optionally, the feedback information includes: response information and CSI;

Transmitting, by the terminal, the PUCCH that carries the feedback information on an uplink subframe, the method includes: the terminal carries all the response information on one PUCCH, and carries the CSI of the component carrier on another PUCCH, where each component carrier The CSI is carried on a PUCCH, and the terminal sends multiple PUCCHs carrying feedback information on the same uplink subframe.

Optionally, the feedback information includes: response information and CSI;

The method further includes: determining, by the terminal, a component carrier group according to the configured component carrier, where the terminal transmitting the PUCCH carrying the feedback information in an uplink subframe, including: the terminal according to the grouping of component carriers, All the acknowledgment information of the group component carrier is carried on the same PUCCH, and the CSI of the component carrier is carried on one or more PUCCHs, and the terminal transmits multiple PUCCHs carrying feedback information in the same uplink subframe.

Optionally, the feedback information includes: response information and SR information;

And transmitting, by the terminal, the PUCCH that carries the feedback information on an uplink subframe, the method includes: the terminal, the acknowledgment information and the SR information are carried on a PUCCH, and the PUCCH carrying the feedback information is sent in an uplink subframe.

The method further includes: determining, by the terminal, a component carrier group according to the configured component carrier; The transmitting, by the terminal, the PUCCH that carries the feedback information, in an uplink subframe, includes:

The terminal carries the SR information and the response information of a part of the component carrier group on one PUCCH according to the grouping of the component carriers, and carries the response information of the remaining component carrier groups on the other one or more PUCCHs, on the same uplink subframe. Send multiple PUCCHs carrying feedback information.

Optionally, the feedback information includes: CSI and SR information;

Transmitting, by the terminal, the PUCCH that carries the feedback information on an uplink subframe, the method includes: the terminal carries the SR information on one PUCCH, and carries the CSI information on one or more PUCCHs, and sends the same on the same uplink subframe. A PUCCH carrying feedback information.

Optionally, the feedback information includes: response information, CSI, and SR information;

Transmitting, by the terminal, the PUCCH that carries the feedback information on an uplink subframe, the method includes: the terminal carries all the response information and the SR information on one PUCCH, and carries the CSI information on one or more PUCCHs, where the terminal is A plurality of PUCCHs carrying the feedback information are sent on the same uplink subframe.

The method further includes: determining, by the terminal, a component carrier group according to the configured component carrier, where the terminal transmitting the PUCCH carrying the feedback information in an uplink subframe, the method includes: the terminal, according to the grouping of the component carrier, the SR The information and the response information of the part of the component carrier group are carried on one PUCCH, and the response information of the remaining component carrier groups is carried on the other one or more PUCCHs, and the CSI information is carried on one or more PUCCHs, and the terminals are in the same A plurality of PUCCHs carrying feedback information are transmitted on the uplink subframe.

Optionally, the determining, by the terminal, the component carrier group according to the configured component carrier, includes: when the terminal is configured with two component carriers, determining that the component carrier is divided into two groups, and one group of component carriers includes a primary component carrier, and A set of component carriers includes a secondary component carrier; or

When the terminal is configured with three component carriers, it is determined that the component carriers are divided into two groups, one group of component carriers includes a primary component carrier, and another component quantity carrier includes two secondary component carriers, or the component carrier is determined. For two groups, a group of component carriers includes a primary component carrier and a secondary component carrier. Another component quantity carrier includes another secondary component carrier; or

When the terminal is configured with four component carriers, it is determined that the component carriers are divided into two groups, one group of component carriers includes a primary component carrier, and another component quantity carrier includes three secondary component carriers, or the component carrier is determined. For two groups, one set of component carriers includes a primary component carrier and one secondary component carrier, and another component quantity carrier includes two secondary component carriers; or

When the terminal is configured with five component carriers, it is determined that the component carriers are divided into two groups, one group of component carriers includes a primary component carrier, and another component quantity carrier includes four secondary component carriers, or the component carrier is determined. For two groups, one set of component carriers includes a primary component carrier and one secondary component carrier, and another component quantity carrier includes three secondary component carriers, or it is determined that the component carriers are divided into two groups, and one group of component carriers includes a primary component carrier. And two supplementary component carriers, and another component quantity carrier includes two secondary component carriers; or, determining that the component carriers are divided into three groups, one group of component carriers includes a primary component carrier, and the other two groups of component carriers each include two auxiliary Component carrier.

Optionally, the terminal sends multiple PUCCHs that carry feedback information in the same subframe, including: the terminal sends the multiple PUCCHs on the same physical resource block or on different physical resource blocks.

Optionally, when the terminal sends the multiple PUCCHs on different physical resource blocks, the multiple PUCCHs are sent on the same component carrier, or are sent on different component carriers.

Optionally, the resource of the PUCCH carrying the response information is determined according to a Control Channel Cell (CCE) index of a physical downlink control channel (PDCCH) corresponding to the component carrier, or a PUCCH according to a semi-persistent scheduling (SPS) corresponding to the component carrier. The resource index is determined, or determined according to a resource allocation indication (ARI) field corresponding to the component carrier, where the resource allocation indication field indicates a resource index of a PUCCH carrying the response information.

Optionally, before the sending the PUCCH, the method further includes:

When the terminal determines that the total power of the PUCCH to be transmitted exceeds the maximum transmit power of the terminal, the PUCCH transmission is turned off one by one according to the PUCCH priority from low to high, until the total power of all PUCCHs to be sent does not exceed the terminal. The maximum transmit power is up to now.

Optionally, the PUCCH priority is determined by using any one of the following manners: determining, according to the primary and secondary component carriers corresponding to the bearer feedback information, the PUCCH priority, The priority of the PUCCH carrying the primary component carrier feedback information is higher than the priority of the PUCCH carrying the secondary component carrier feedback information;

Determining the PUCCH priority according to an index value of a component carrier corresponding to the bearer feedback information;

Determining the PUCCH priority according to the content of the feedback information carried, and carrying the SR information

The priority of the PUCCH is higher than the priority of the PUCCH carrying the response information, and the priority of the PUCCH carrying the response information is higher than the priority of the PUCCH carrying the CSI.

Optionally, the feedback information includes the response information, and the terminal is configured to use the PUCCH format lb joint channel selection manner to feedback the response information. Before the terminal sends the PUCCH, the method further includes:

When the terminal determines that the total power of the two PUCCHs to be transmitted exceeds the maximum transmit power of the terminal, the terminal closes the transmission of the PUCCH carrying the secondary component carrier response information, and transmits only the PUCCH carrying the primary component carrier response information.

The embodiment of the present invention further provides a terminal, where the terminal is a terminal configured with multiple component carriers, including a receiving module and a sending module, where:

The receiving module is configured to: receive, by the base station, configuration information that allows the terminal to send multiple physical uplink control channels (PUCCHs) in the same subframe;

The sending module is configured to: send a PUCCH ₀ carrying feedback information on an uplink subframe.

Optionally, the feedback information includes: response information;

The terminal further includes a grouping module, configured to: determine a component carrier packet according to the configured component carrier;

The sending module is configured to: send, by using the following manner, a PUCCH that carries the feedback information in an uplink subframe: according to the grouping of component carriers, all the response information of each component carrier is carried on the same PUCCH, The sending module sends one or more PUCCHs carrying the response information on one uplink subframe.

Optionally, the feedback information includes: channel state information (CSI);

The sending module is configured to send the bearer in an uplink subframe in the following manner: PUCCH for feeding information: The CSI of each component carrier is carried on one PUCCH, and the transmitting module transmits one or more PUCCHs carrying CSI in one uplink subframe.

Optionally, the feedback information includes: response information and CSI;

The sending module is configured to send the PUCCH carrying the feedback information in an uplink subframe in the following manner: all the response information is carried on one PUCCH, and the CSI of the component carrier is carried on other PUCCH, where each The CSI of the component carrier is carried on one PUCCH, and the sending module sends multiple PUCCHs carrying feedback information in the same uplink subframe.

Optionally, the feedback information includes: response information and CSI;

The terminal further includes a grouping module configured to determine a component carrier group according to the configured component carrier;

The sending module is configured to send the PUCCH carrying the feedback information on an uplink subframe in the following manner: According to the packet of the component carrier, all the response information of each component carrier is carried on the same PUCCH, and the component is The CSI of the carrier is carried on one or more PUCCHs, and the sending module sends multiple PUCCHs carrying feedback information on the same uplink subframe.

Optionally, the feedback information includes: response information and scheduling request (SR) information, where the sending module is configured to send the PUCCH carrying the feedback information in an uplink subframe in the following manner: The SR information is carried on a PUCCH, and the PUCCH carrying the feedback information is sent on an uplink subframe.

The sending module is configured to send the PUCCH carrying the feedback information on an uplink subframe in the following manner: according to the packet of the component carrier, carrying the SR information and the response information of a part of the component carrier group on one PUCCH, The acknowledgment information of the remaining component carrier groups is carried on the other one or more PUCCHs, and the sending module sends multiple PUCCHs carrying the feedback information in the same uplink subframe.

Optionally, the feedback information includes: CSI and SR information;

The sending module is configured to send the bearer in an uplink subframe in the following manner: The PUCCH of the information is carried: The SR information is carried on one PUCCH, and the CSI information is carried on one or more PUCCHs. The sending module sends multiple PUCCHs carrying feedback information in the same uplink subframe.

The sending module is configured to send, by using the following manner, a PUCCH carrying the feedback information on an uplink subframe: all the response information and the SR information are carried on one PUCCH, and the CSI information is carried on one or more PUCCHs. The sending module sends multiple PUCCHs that carry the feedback information in the same uplink subframe.

The sending module is configured to send the PUCCH carrying the feedback information on an uplink subframe in the following manner: according to the packet of the component carrier, carrying the SR information and the response information of a part of the component carrier group on one PUCCH, The acknowledgment information of the remaining component carrier groups is carried on the other one or more PUCCHs, and the CSI information is carried on one or more PUCCHs. The sending module sends multiple PUCCHs carrying feedback information in the same uplink subframe.

Optionally, the foregoing terminal further includes:

The power judging module is configured to: when the sending module sends the PUCCH, determine that the total power of the PUCCH to be transmitted exceeds the maximum transmit power of the terminal, and close the PUCCH transmission according to the PUCCH priority from low to high. Until the total power of all PUCCHs to be transmitted does not exceed the maximum transmit power of the terminal.

The method for feeding back multiple response feedback information on the PUCCH in the scenario of supporting a large bandwidth carrier aggregation according to the embodiment of the present invention improves the ability of the LTE-A evolved system to feedback control information bits on the uplink control channel, and increases The number of bits fed back improves the utilization of resources, thereby increasing system throughput. BRIEF abstract Figures la and lb are schematic diagrams of the HARQ-ACK bundling mode;

2 is a schematic diagram of a HARQ-ACK multiplexing; multiplexing;) mode;

3 is a schematic diagram of a 3-channel structure of a PUCCH format;

4 is a flow chart of an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a terminal according to an embodiment of the present invention;

Figure 6 is a flowchart of Embodiment 1 of the present invention;

Figure 7 is a flow chart of Embodiment 2 of the present invention;

Figure 8 is a flowchart of Embodiment 3 of the present invention;

Figure 9 is a flow chart of Embodiment 4 of the present invention. Preferred embodiment of the invention

The existing LTE-A system can only support one PUCCH transmission at the same time in carrier aggregation. However, in the future evolution technology, supporting multiple PUCCHs for some UEs does not cause uplink coverage limitation. If these UEs can transmit simultaneously on multiple PUCCHs, it is bound to increase the existing LTE-A system. Uplink control information feedback capability, ultimately improving downlink and uplink throughput. Therefore, the following solutions are proposed: The UE configured with multiple component carriers receives configuration information sent by the base station to allow multiple physical uplink control channels (PUCCHs) to be sent in the same subframe, and the terminal needs to send feedback information when uplink The PUCCH carrying the feedback information is sent on an uplink subframe. It can be implemented in the process shown in Figure 4, including the following steps:

Step 401: A UE configured with multiple component carriers needs to send uplink feedback information. The term “multiple” includes two cases, and includes two or more cases.

The feedback information includes one or more of the following information: response information, channel state information (CSI), scheduling request (SR) information. The response information includes correct answer (ACK) information and/or error response "NACK" information.

Step 402, the UE determines whether the capability of transmitting multiple PUCCHs is configured. If not, go to step 3. If it is configured, go to step 4.

The network side can enable the UE to have the capability of transmitting multiple PUCCHs at the same time through signaling configuration. It can be configured that all UEs have this capability or only a portion of the UEs have this capability. In order to be compatible with the prior art UE, when the response information is sent, the determination of this step may be performed. If the capability of transmitting multiple PUCCHs at the same time is performed, the subsequent steps may be continued. If the capability is not available, the method may be performed according to the prior art. operating. In other embodiments, the determination of this step may not be performed, and step 404 is directly performed, for example, when all UEs are configured with the capability.

Step 403: Send the response information according to the prior art;

Step 404: The UE sends a PUCCH carrying feedback information on an uplink subframe.

Specifically, when the feedback information includes the response information, the terminal determines the component carrier group according to the configured component carrier, and carries all the response information of each component carrier on the same PUCCH according to the packet of the component carrier, in an uplink subframe. The one or more PUCCHs carrying the response information are sent on.

When the feedback information includes CSI, the terminal carries the CSI of each component carrier on one PUCCH, and transmits one or more PUCCHs carrying CSI in one uplink subframe.

When the feedback information includes the SR information, the terminal transmits a PUCCH carrying the SR information on an uplink subframe.

When the feedback information includes the response information and the CSI, the terminal carries all the response information on one PUCCH, and carries the CSI of the component carrier on other PUCCHs, where the CSI of each component carrier is carried on one PUCCH, and the terminal is in the same uplink. A plurality of PUCCHs carrying feedback information are transmitted on the frame. Or, the terminal carries all the response information of each component carrier on the same PUCCH according to the grouping of the component carriers, and carries the CSI of the component carrier on one or more PUCCHs, and the terminal sends multiple bearers in the same uplink subframe. PUCCH with feedback information.

When the feedback information includes the response information and the SR information, the terminal carries the response information and the SR information on a PUCCH, and sends the PUCCH carrying the feedback information in an uplink subframe. Alternatively, the terminal 4 carries the SR information and the response information of a part of the component carrier group on one PUCCH according to the packet of the component carrier, and carries the response information of the remaining component carrier groups on the other one or more PUCCHs, in the same uplink. A plurality of PUCCHs carrying feedback information are transmitted on the frame.

When the feedback information includes the CSI and the SR information, the terminal carries the SR information on one PUCCH, carries the CSI information on one or more PUCCHs, and sends multiples in the same uplink subframe. A PUCCH carrying feedback information.

When the feedback information includes the response information, the CSI, and the SR information, the terminal carries all the response information and the SR information on one PUCCH, and carries the CSI information on one or more PUCCHs, and the terminal sends multiple bearers on the same uplink subframe. The PUCCH of the feedback information. Alternatively, the terminal carries the SR information and the response information of a part of the component carrier group on one PUCCH according to the grouping of the component carriers, and carries the response information of the remaining component carrier groups on the other one or more PUCCHs, and carries the CSI information in one On multiple PUCCHs, the terminal sends multiple PUCCHs carrying feedback information on the same uplink subframe.

The determining, by the terminal, the component carrier group according to the configured component carrier includes determining, by the plurality of component carriers of the terminal, which groups are included, and which component carriers are included in each group. Each component quantity carrier includes one or more component carriers, and each group contains different component carriers. For example, the primary and secondary component carriers may be grouped, that is, the primary component carrier is a group, and the secondary component carrier is a group. In addition, other grouping methods may be used, such as an approximate averaging method. When there are 4 carriers, two or two carriers are one group; when there are 5 carriers, two of the carriers are one group, and the other three carriers are one. Groups, or they can also be divided into three groups, two of which each contain two carriers, and the other group contains one carrier.

Specifically, when the terminal is configured with two component carriers, the determined component carriers are divided into two groups, one component carrier includes a primary component carrier, and another component carrier includes a secondary component carrier;

When the terminal is configured with three component carriers, the determined component carriers are divided into two groups, one group of component carriers includes a primary component carrier, and another component carrier includes two secondary component carriers, or the determined component carriers are divided into two groups, one group. The component carrier includes a primary component carrier and a secondary component carrier, and the other component quantity carrier includes another secondary component carrier;

When the terminal is configured with four component carriers, the determined component carriers are divided into two groups, one group of component carriers includes a primary component carrier, and the other component carrier includes three secondary component carriers, or the determined component carriers are divided into two groups, one group. The component carrier includes a primary component carrier and a secondary component carrier, and the other component quantity carrier includes two secondary component carriers;

When the terminal is configured with 5 component carriers, the determined component carriers are divided into two groups, one group of component carriers includes a primary component carrier, and another component carrier includes four secondary component carriers, or the determined component carriers are divided into two groups, one group. The component carrier includes a primary component carrier and a secondary component carrier, and another component quantity carrier includes three secondary component carriers, or the determined component carrier is divided into two groups, and the group of component carriers includes The primary component carrier and the two secondary component carriers, and the other component carrier includes two secondary component carriers; or, the determined component carriers are divided into three groups, one group of component carriers includes a primary component carrier, and the other two groups of component carriers each include two Secondary component carrier.

When the terminal sends multiple PUCCHs carrying feedback information in the same subframe, the terminal may send the multiple PUCCHs on the same physical resource block or on different physical resource blocks. When the PUCCH is transmitted on different physical resource blocks, the multiple PUCCHs may be transmitted on the same component carrier or on different component carriers.

The resource of the PUCCH carrying the response information is determined according to the CCE (Control Channel Element) index of the PDCCH (Physical Downlink Control Channel) corresponding to the component carrier, or the SPS according to the component carrier. - Persistent Schedule, resource index determination, or based on the resource allocation indication (ARI) field corresponding to the component carrier, the ARI field indicating the resource index of the PUCCH carrying the response information.

Optionally, before transmitting the PUCCH, the terminal determines whether the total power of the PUCCH to be sent exceeds the maximum transmit power of the local terminal, and if yes, turns off the PUCCH transmission according to the PUCCH priority from low to high, until all the to The total power of the transmitted PUCCH does not exceed the maximum transmit power of the UE. For example, when the terminal is configured to use the channel selection feedback mode, when the total power of the two PUCCHs to be transmitted exceeds the maximum transmit power of the terminal, the PUCCH carrying the secondary component carrier response information is turned off, and only the bearer is sent. PUCCH _{0 of} component carrier response information

The PUCCH priority may be determined by one or more of the following methods:

A. determining, according to the primary and secondary component carriers corresponding to the bearer feedback information, for example, the priority of the PUCCH carrying the primary component carrier information is higher than the priority of the PUCCH carrying the secondary component carrier information;

B. determining, according to the index value of the component carrier corresponding to the bearer feedback information, for example, the priority of the PUCCH carrying the component carrier information with a low index value is higher than the priority of the PUCCH carrying the component carrier information with a high index value;

C. Determine according to the content of the feedback information of the bearer, for example, the PUCCH carrying the SR information. The priority is higher than the priority of the PUCCH carrying the acknowledgement information, and the priority of the PUCCH carrying the acknowledgement information is higher than the priority of the PUCCH carrying the CSI.

The foregoing three priority division modes may be used in combination. For example, the primary component carrier has the highest priority according to the foregoing principle A, and then the priority is divided according to the above principle B or C for all the secondary component carriers.

As shown in FIG. 5, the terminal configured to implement the foregoing method with multiple component carriers includes a receiving module 501 and a sending module 502, where:

The receiving module 501 is configured to receive, by the base station, configuration information that is allowed to send multiple PUCCHs in the same subframe.

The sending module 502 is configured to send a PUCCH carrying the feedback information in an uplink subframe when the feedback information is sent in the uplink.

Optionally, the feedback information includes: response information; at this time, the terminal further includes a grouping module, configured to determine a component carrier group according to the configured component carrier;

The sending module 502 is configured to: send the PUCCH carrying the feedback information on an uplink subframe in the following manner: according to the grouping of the component carriers, all the response information of each component carrier is carried on the same PUCCH, The sending module sends one or more PUCCHs carrying the response information on one uplink subframe.

Optionally, the feedback information includes: CSI; the sending module 502 is configured to: send, by using the following manner, a PUCCH that carries the feedback information on an uplink subframe: carrying a CSI of each component carrier on a PUCCH, where The transmitting module sends one or more PUCCHs carrying CSI on one uplink subframe.

Optionally, the feedback information includes: response information and CSI; the sending module is configured to send, by using the following manner, a PUCCH that carries the feedback information on an uplink subframe: all the response information is carried on a PUCCH, and The CSI of the component carrier is carried on the other PUCCH, where the CSI of each component carrier is carried on one PUCCH, and the sending module sends multiple PUCCHs carrying feedback information in the same uplink subframe.

Optionally, the feedback information includes: response information and CSI; the terminal further includes a grouping module 503. It is configured to determine a component carrier group according to the configured component carrier;

The sending module 502 is configured to: send the PUCCH carrying the feedback information on an uplink subframe in the following manner: According to the packet of the component carrier, all the response information of each component carrier is carried on the same PUCCH, and the component is The CSI of the carrier is carried on one or more PUCCHs, and the sending module sends multiple PUCCHs carrying feedback information in the same uplink subframe.

Optionally, the feedback information includes: response information and SR information; the sending module is configured to: send, by using the following manner, a PUCCH that carries the feedback information on an uplink subframe: carrying the response information and the SR information in a PUCCH The PUCCH carrying the feedback information is sent on an uplink subframe.

Optionally, the feedback information includes: response information and SR information; the terminal further includes a grouping module, configured to determine a component carrier group according to the configured component carrier;

The sending module 502 is configured to: send the PUCCH carrying the feedback information on an uplink subframe in the following manner: according to the packet of the component carrier, carrying the SR information and the response information of a part of the component carrier group on one PUCCH, The acknowledgment information of the remaining component carrier groups is carried on the other one or more PUCCHs, and the sending module sends multiple PUCCHs carrying the feedback information in the same uplink subframe.

Optionally, the feedback information includes: CSI and SR information. The sending module 502 is configured to send, by using the following manner, a PUCCH that carries the feedback information on an uplink subframe: carrying the SR information on a PUCCH, The CSI information is carried on one or more PUCCHs, and the sending module sends multiple PUCCHs carrying feedback information on the same uplink subframe.

Optionally, the feedback information includes: response information, CSI, and SR information. The sending module 502 is configured to send the PUCCH carrying the feedback information in an uplink subframe in the following manner: all the response information and the SR information. The bearer is carried on one PUCCH, and the CSI information is carried on one or more PUCCHs. The sending module sends multiple PUCCHs carrying the feedback information on the same uplink subframe.

Optionally, the feedback information includes: response information, CSI, and SR information; the terminal further includes a packet module 503 configured to determine a component carrier group according to the configured component carrier;

The sending module 502 is configured to send the bearer on an uplink subframe in the following manner. PUCCH of the feedback information: According to the grouping of the component carriers, the SR information and the response information of a part of the component carrier groups are carried on one PUCCH, and the response information of the remaining component carrier groups is carried on one or more other PUCCHs, and the CSI information is carried. On one or more PUCCHs, the sending module sends multiple PUCCHs carrying feedback information on the same uplink subframe.

Optionally, the terminal further includes a power determining module 504, configured to send at the sending module.

Before the PUCCH, it is determined whether the total power of the PUCCH to be transmitted exceeds the maximum transmit power of the local terminal. If it exceeds, the PUCCH transmission is turned off one by one according to the PUCCH priority from low to high, until the total power of all PUCCHs to be transmitted is not More than the maximum transmit power of the terminal.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other.

Example 1

In a large bandwidth system, when a carrier is aggregated, a UE configured to use the channel selection feedback mode feedback response information is configured to simultaneously transmit a plurality of PUCCH channels. The number of CCs that the UE aggregates in the downlink is two, one of which is a PCC and the other is an SCC. The process of sending the response information by the UE is as shown in FIG. 6, and includes the following steps:

Step 601: The UE has ACK/NACK information and needs feedback;

Step 602: The ACK/NACK information of the PCC is carried on the first PUCCH by using the channel selection feedback mode, and the ACK/NACK information of the SCC is carried on the second PUCCH.

The UE configured to use the channel selection feedback mode feedback response information may optionally send two

PUCCH ₀

Step 603, it is determined whether the total power of the two PUCCHs to be transmitted exceeds the maximum transmit power of the UE, if yes, go to step 604, if no, go to step 605;

Step 604, the second PUCCH is turned off, and step 605 is performed;

For the UE configured to use the channel selection feedback mode feedback response information, the bearer may be optionally closed.

The PUCCH transmission of the SCC response message transmits only the PUCCH carrying the PCC response information.

Step 605: Send a PUCCH. In this embodiment, the resource for transmitting the PUCCH is determined in the following manner:

If the system is FDD, the PUCCH resource is determined according to the first CCE index of the PDCCH corresponding to the PCC, or is determined according to the PUCCH resource index of the SPS corresponding to the PCC, for the PUCCH carrying the PCC response information; PUCCH, the PUCCH resource is determined according to a resource allocation indication (ARI) field corresponding to the SCC, and the ARI domain indicates a resource index of a PUCCH carrying SCC response information.

If the system is TDD, the PUCCH resource is determined according to the CCE index of the PDCCH corresponding to the PCC for the PUCCH carrying the PCC response information, and the PUCCH resource is determined according to the ARI domain corresponding to the SCC for the PUCCH carrying the SCC response information, the ARI domain Indicates the resource index of the PUCCH carrying the SCC response information.

Example 2

When the large bandwidth system is in carrier aggregation, the UE configured in the channel selection feedback mode is configured to simultaneously transmit multiple PUCCH channels. The number of CCs that the UE aggregates in the downlink is three, one of which is a PCC and the other two are SCCs. The process of sending the response information by the UE is as shown in FIG. 7, and includes the following steps:

Step 701: The UE has ACK/NACK information and needs feedback;

Step 702: The ACK/NACK information of the PCC is carried on the first PUCCH by using the channel selection feedback mode, and the ACK/NACK information of the SCC is carried on the second PUCCH.

Step 703, determining whether the total power of the two PUCCHs to be transmitted exceeds the maximum transmit power of the UE, and if yes, performing step 705, if no, executing step 705;

Step 704, the second PUCCH is turned off, and step 705 is performed.

Step 705, sending a PUCCH.

In this embodiment, the resource for transmitting the PUCCH is determined in the following manner:

If the system is FDD, the PUCCH resource is determined according to the first CCE index of the PDCCH corresponding to the PCC, or is determined according to the PUCCH resource index of the SPS corresponding to the PCC, for the PUCCH carrying the PCC response information; PUCCH, the PUCCH resource is determined according to an ARI domain corresponding to each SCC, and the ARI domain indicates that the bearer SCC should be A resource index of the PUCCH of the message.

If the system is TDD, the PUCCH resource is determined according to the CCE index of the PDCCH corresponding to the PCC for the PUCCH carrying the PCC response information, and the PUCCH resource is determined according to the ARI domain corresponding to the SCC for the PUCCH carrying the SCC response information, the ARI The field indicates the resource index of the PUCCH carrying the SCC response information.

Example 3

When the large bandwidth system is in carrier aggregation, the UE configured in the channel selection feedback mode is configured to simultaneously transmit multiple PUCCH channels. The number of CCs that the UE aggregates in the downlink is four, one of which is a PCC and the other three are SCCs. Then, the process of sending the response information by the UE is as shown in FIG. 8, and includes the following steps:

Step 801: The UE has ACK/NACK information and needs feedback;

Step 802: Configure a PCC and an SCC as a group (hereinafter referred to as group 1), and use the channel selection feedback manner to carry the ACK/NACK information of the group 1 on the first PUCCH, and configure the other two SCCs into one group ( Hereinafter referred to as group 2), the ACK/NACK information of group 2 is carried on the second PUCCH by using channel selection feedback manner;

Step 803, determining whether the total power of the two PUCCHs to be sent exceeds the maximum transmit power of the UE, and if yes, executing step 805, if no, executing step 805;

Step 804, the second PUCCH is turned off, and step 805 is performed;

Step 805, sending a PUCCH.

If the system is FDD, the PUCCH of the response information of the bearer group 1 is selected, the PUCCH resource index of the SPS transmission corresponding to the PUCCH resource, and the CCE index provided by the PDCCH corresponding to the PCC in the group are selected; the PUCCH for the response information of the bearer group 2 is selected. The PUCCH resource is selected from the resource index indicated by the ARI domain corresponding to each SCC.

If the system is TDD, for the PUCCH carrying the response information of the group 1, the CCE index of the PUCCH resource from the PDCCH corresponding to the PCC in the group and the ARI domain corresponding to the SCC in the group The PUCCH resource is selected from the resource index indicated by the ARI domain corresponding to each SCC.

Example 4

In the case of carrier aggregation, a UE is configured to use PUCCH format 3 feedback response information, and the UE is configured to simultaneously transmit multiple PUCCH channels. The process of sending the response information by the UE is as shown in FIG. The following steps:

Step 901, the UE determines whether there is CSI information needs to be fed back together with the ACK/NACK information, if yes, step 802 is performed, if no, step 905 is performed;

Step 902, the UE determines whether there is SR information needs to be fed back together with the ACK/NACK information, if yes, step 903 is performed, if no, step 904 is performed;

Step 903: At this time, the SR and the CSI are sent together with the response information, the UE uses the multiple PUCCH transmission in the uplink, and the PUCCH Format 3 carries the response information and the SR information in one or more PUCCHs, and is used in one or more PUCCHs. PUCCH Format 2 carries CSI information;

In this embodiment, the number of PUCCHs carrying CSI information depends on the number of CSIs to be transmitted, that is, the CSI of one CC (Cell) is transmitted per PUCCH.

Step 904: At this time, the CSI is sent together with the response information, and the UE uses the multiple PUCCH transmission in the uplink, where one PUCCH uses PUCCH Format 3 to carry all ACK/NACK, and one or more PUCCH uses PUCCH Format 2 to carry CSI information. ;

Step 905, the UE determines whether there is SR information needs to be fed back together with the ACK/NACK information, if yes, go to step 906, if no, go to step 907;

Step 906: At this time, an SR is sent together with the response information, and the UE transmits multiple PUCCHs in the uplink, where one or more PUCCHs use PUCCH Format 3 to carry all ACK/NACK and SR information;

Step 907, at this time, only the response information needs to be sent, and the UE only uses the PUCCH on one PUCCH.

PUCCH Format3 carries all ACK/NACKs.

The PUCCH Format 3 resource is obtained by a high layer configuration and an ARI. Optionally, before the sending, the UE determines whether the total power of the PUCCH to be sent is greater than the maximum transmit power of the UE, and if yes, turns off the sending of the partial PUCCH.

One of ordinary skill in the art will appreciate that all or a portion of the above steps may be accomplished by a program instructing the associated hardware, such as a read-only memory, a magnetic disk, or an optical disk. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the above embodiment may be implemented in the form of hardware or in the form of a software function module. The invention is not limited to any specific form of combination of hardware and software.

It is a matter of course that the invention may be embodied in various other forms and modifications without departing from the spirit and scope of the invention.

Industrial Applicability The method for feeding back multiple feedback information on a PUCCH in a scenario of supporting a large bandwidth carrier aggregation according to an embodiment of the present invention improves the ability of the LTE-A evolved system to feedback control information bits on an uplink control channel. The number of bits of feedback is increased, and resource utilization is increased, thereby increasing system throughput.

Claims

1. A method for transmitting feedback information, including:

The terminal sends a PUCCH carrying feedback information on an uplink subframe.

2. The method of claim 1 wherein:

The feedback information includes: response information;

The method further includes: determining, by the terminal, a component carrier group according to the configured component carrier, where the terminal transmitting the PUCCH carrying the feedback information in an uplink subframe, including: the terminal according to the grouping of component carriers, component carrier group information carried in all transponders on the same PUCCH, or send a response message carried on a plurality of uplink subframe PUCCH ₀

3. The method of claim 1 wherein:

The feedback information includes: channel state information (CSI);

4. The method of claim 1 wherein:

The feedback information includes: scheduling request (SR) information;

5. The method of claim 1 wherein:

The feedback information includes: response information and CSI;

6. The method of claim 1 wherein:

The feedback information includes: response information and CSI;

7. The method of claim 1 wherein:

The feedback information includes: response information and SR information;

8. The method of claim 1 wherein:

The feedback information includes: response information and SR information;

The method further includes: determining, by the terminal, the component carrier group according to the configured component carrier; wherein, the terminal sends the PUCCH that carries the feedback information in an uplink subframe, including:

9. The method of claim 1 wherein:

The feedback information includes: CSI and SR information;

10. The method of claim 1 wherein:

The feedback information includes: response information, CSI, and SR information; Transmitting, by the terminal, the PUCCH that carries the feedback information on an uplink subframe, the method includes: the terminal carries all the response information and the SR information on one PUCCH, and carries the CSI information on one or more PUCCHs, where the terminal is A plurality of PUCCHs carrying the feedback information are sent on the same uplink subframe.

11. The method of claim 1 wherein:

The feedback information includes: response information, CSI, and SR information;

12. The method of claim 2 or 6 or 8 or 11, wherein:

Determining, by the terminal, the component carrier group according to the configured component carrier, including:

When the terminal is configured with two component carriers, it is determined that the component carriers are divided into two groups, one component carrier includes a primary component carrier, and another component carrier includes a secondary component carrier; or

When the terminal is configured with three component carriers, it is determined that the component carriers are divided into two groups, one group of component carriers includes a primary component carrier, and another component quantity carrier includes two secondary component carriers, or the component carrier is determined. For two groups, one set of component carriers includes a primary component carrier and one secondary component carrier, and another component quantity carrier includes another secondary component carrier; or

When the terminal is configured with five component carriers, it is determined that the component carriers are divided into two groups, one group of component carriers includes a primary component carrier, and another component quantity carrier includes four secondary component carriers, or the component carrier is determined. For two groups, one set of component carriers includes a primary component carrier and one secondary component carrier, and another component quantity carrier includes three secondary component carriers, or it is determined that the component carriers are divided into two groups. One set of component carriers includes a primary component carrier and two secondary component carriers, and another component quantity carrier includes two secondary component carriers; or, the component carriers are determined to be divided into three groups, one set of component carriers includes a primary component carrier, and the other two The group component carriers each include two secondary component carriers.

The method according to claim 2 or 3 or 5 or 6 or 8 or 9 or 10 or 11, wherein: the terminal sends a plurality of PUCCHs carrying feedback information on the same subframe, including: The plurality of PUCCHs are transmitted on the same physical resource block or on different physical resource blocks.

14. The method of claim 13 wherein:

When the terminal sends the multiple PUCCHs on different physical resource blocks, the multiple PUCCHs are sent on the same component carrier, or are sent on different component carriers.

The method according to claim 2 or 5 or 6 or 7 or 8 or 10 or 11, wherein: the resource of the PUCCH carrying the response information is based on the control channel cell of the physical downlink control channel (PDCCH) corresponding to the component carrier The (CCE) index is determined, or is determined according to a semi-static scheduling (SPS) PUCCH resource index corresponding to the component carrier, or determined according to a resource allocation indication (ARI) field corresponding to the component carrier, where the resource allocation indication field indicates bearer response information. The resource index of the PUCCH.

16. A method according to any of claims 1-11, wherein:

Before the terminal sends the PUCCH, the method further includes:

17. The method of claim 16 wherein:

The PUCCH priority is determined by any of the following methods:

Determining the PUCCH priority according to the primary and secondary component carriers corresponding to the bearer feedback information, and the priority of the PUCCH carrying the primary component carrier feedback information is higher than the priority of the PUCCH carrying the secondary component carrier feedback information;

Determining the PUCCH according to an index value of a component carrier corresponding to the feedback information of the bearer priority;

Determining the priority of the PUCCH according to the content of the feedback information of the bearer, the priority of the PUCCH carrying the SR information is higher than the priority of the PUCCH carrying the acknowledgement information, and the priority of the PUCCH carrying the acknowledgement information is higher than the priority of the PUCCH carrying the CSI .

18. The method of claim 5 or 6 or 7 or 8 or 10 or 11, wherein: the feedback information includes response information, and the terminal is configured to use a PUCCH format lb joint channel selection manner to feedback a response The method, before the terminal sends the PUCCH, the method further includes:

A terminal, where the terminal is a terminal configured with multiple component carriers, including a receiving module and a sending module, where:

20. The terminal of claim 19, wherein:

The feedback information includes: response information;

21. The terminal of claim 19, wherein:

The feedback information includes: channel state information (CSI);

22. The terminal of claim 19, wherein:

The feedback information includes: response information and CSI;

23. The terminal of claim 19, wherein:

The feedback information includes: response information and CSI;

24. The terminal of claim 19, wherein:

The feedback information includes: response information and scheduling request (SR) information;

The sending module is configured to send the PUCCH carrying the feedback information on an uplink subframe in the following manner: carrying the response information and the SR information on one PUCCH, and transmitting the feedback on an uplink subframe PUCCH of information.

25. The terminal of claim 19, wherein:

The feedback information includes: response information and SR information;

The sending module is configured to send the PUCCH carrying the feedback information on an uplink subframe in the following manner: according to the packet of the component carrier, carrying the SR information and the response information of a part of the component carrier group on one PUCCH, The response information of the remaining component carrier groups is carried in other On one or more PUCCHs, the sending module sends multiple PUCCHs carrying feedback information on the same uplink subframe.

26. The terminal of claim 19, wherein:

The feedback information includes: CSI and SR information;

The sending module is configured to send the PUCCH carrying the feedback information in an uplink subframe in the following manner: carrying the SR information on one PUCCH, and carrying the CSI information on one or more PUCCHs, where the sending The module sends multiple PUCCHs carrying feedback information on the same uplink subframe.

27. The terminal of claim 19, wherein:

28. The terminal of claim 19, wherein:

The terminal according to any one of claims 19 to 28, further comprising: a power judging module, configured to: before the transmitting module sends the PUCCH, determine that the total power of the PUCCH to be transmitted exceeds the terminal For the maximum transmit power, the PUCCH transmission is turned off one by one according to the PUCCH priority from low to high, until the total power of all PUCCHs to be transmitted does not exceed the maximum transmit power of the terminal.