WO2016161652A1

WO2016161652A1 - Transmission method for hybrid automatic repeat request response message, user equipment and base station

Info

Publication number: WO2016161652A1
Application number: PCT/CN2015/076366
Authority: WO
Inventors: 吕永霞; 官磊
Original assignee: 华为技术有限公司
Priority date: 2015-04-10
Filing date: 2015-04-10
Publication date: 2016-10-13
Also published as: CN107113119A

Abstract

Provided are a transmission method for a hybrid automatic repeat request response message, a user equipment and a base station. The embodiments of the present invention realize the aggregation of more downlink carriers, and overcome the defect that the number of carriers for downlink carrier aggregation is limited by the number of bits of a hybrid automatic repeat request response message transmitted by an uplink control channel.

Description

Hybrid automatic retransmission response message transmission method, user equipment and base station

Technical field

The embodiments of the present invention relate to communication technologies, and in particular, to a method, a user equipment, and a base station for transmitting a hybrid automatic retransmission response message.

Background technique

Long Term Evolution (LTE) is a long-term evolution of the Universal Mobile Telecommunications System (UMTS) technology standard developed by the 3rd Generation Partnership Project (3GPP). Key technologies such as Orthogonal Frequency Division Multiplexing (OFDM) and Multi-Input & Multi-Output (MIMO) have been introduced, which have significantly increased spectrum efficiency and data transmission rate. development of.

The downlink and uplink of the LTE system are based on Orthogonal Frequency Division Multiplexing Access (OFDMA) and Single Carrier-Frequency Division Multiplexing Access (SC-FDMA). The frequency resource is divided into OFDM or SC-FDMA symbols (hereinafter referred to as time domain symbols) in the time domain dimension and subcarriers in the frequency domain dimension, and the smallest resource granularity is called a Resource Element (RE), that is, Represents a time domain symbol on the time domain and a time-frequency grid consisting of one subcarrier on the frequency domain. The transmission of the service in the LTE system is based on an Evolved NodeB (eNB). The basic time unit of the scheduling is one subframe, and one subframe includes multiple time domain symbols. The specific scheduling process is that the base station sends a control channel, such as a physical downlink control channel (PDCCH) or an enhanced physical downlink control channel (EPDCCH), which can carry a physical downlink shared channel (Physical). Downlink Shared Channel (PDSCH) or Scheduling Information of Physical Uplink Shared Channel (PUSCH), which includes control information such as resource allocation information and adjustment coding mode. A user equipment (User Equipment, UE for short) detects a control channel in a subframe and according to the detected control channel. The scheduling information carried is used for receiving the downlink data channel or transmitting the uplink data channel.

LTE supports two types of duplex modes: Frequency Division Multiplexing (FDD) and Time Duplexing Division (TDD). For FDD, the downlink and uplink are transmitted on different carriers. For the TDD system, the uplink and the downlink are transmitted at different times of the same carrier, and specifically include a downlink subframe, an uplink subframe, and a special subframe on one carrier. LTE currently supports 7 different TDD uplink and downlink configurations.

LTE adopts Hybrid Automatic Repeat Request (HARQ) mechanism to implement error detection and error correction. In the following example, after the UE receives the PDSCH, if the receiving is correct, the UE sends feedback confirmation on the PUCCH. ACK), if not correct, feedback non-acknowledgement (NACK) on the PUCCH. LTE also supports Carrier Aggregation (CA) technology, in which a base station allocates multiple carriers to one UE to increase the data rate of the UE. When the CA is performed, the multiple carriers sent by the base station are synchronously transmitted. The UE can separately detect the PDCCH and the corresponding PDSCH for each carrier. The specific detection process of each carrier is similar to the single carrier case. The LTE system supports FDD CA, TDD CA, and FDD+TDD CA. For the TDD CA, it is further divided into a TDD CA with the same uplink and downlink configuration and a TDD CA with different uplink and downlink configurations. There is one primary carrier and at least one secondary carrier in the CA mode, and the PUCCH carrying the ACK/NACK is only transmitted on the primary carrier of the UE. The PUCCH transmission mode in the CA mode includes two modes: a channel selection mode and a PUCCH format 3, wherein in the channel selection mode, PUCCH format 1a/1b is used for ACK/NACK feedback, but the channel selection mode supports CA of two carriers at most. The PUCCH format 3 mode adopts a transmission structure of DFT-S-OFDM and can support up to 20 ACK/NACK transmissions.

However, as the LTE technology continues to evolve, in the scenario of supporting 32 carriers for aggregation, TDD-FDD carrier aggregation is taken as an example, where the TDD carrier is the primary carrier, and the uplink and downlink configurations are 5, and the other carriers are FDD carriers. The number of maximum ACK/NACKs that need to be fed back on an uplink primary carrier is 9+10*31=319. In general, the transmit power of the user equipment is constant and does not follow the number of downlink carriers. Increase and increase, when the number of HARQ-ACKs to be transmitted increases, and the uplink power of the user is limited, the performance of the HARQ-ACK decreases as the number of HARQ-ACKs increases, that is, the downlink data of the user may exist. Support for 32 carriers is received, but the uplink does not feed back the corresponding number of HARQ-ACKs.

Summary of the invention

The embodiment of the present invention provides a method for transmitting a hybrid automatic retransmission response message, a user equipment, and a base station, which implements more downlink carrier aggregation, and overcomes the number of carriers for downlink carrier aggregation, which is limited by the hybrid automatic retransmission of the uplink control channel transmission. A defect in the number of response message bits.

In a first aspect, an embodiment of the present invention provides a user equipment, including:

a receiving module, configured to receive radio resource control RRC configuration information sent by the base station, where the RRC configuration information carries carrier group information, where the carrier group information includes a number of each carrier group in the same carrier set and a number of each carrier in each carrier group ;

The receiving module is further configured to receive at least one first downlink control information that is sent by the base station, where each first downlink control information carries a downlink allocation index, and at least one of the first downlink control information further carries a downlink allocation total;

a processing module, configured to generate a first hybrid automatic retransmission response message according to the total downlink allocation, the downlink allocation index of each first downlink control information, and the physical downlink shared channel corresponding to each first downlink control information;

Performing a compression process on the first hybrid automatic retransmission response message according to the carrier grouping information to generate a hybrid automatic retransmission response message;

a sending module, configured to send the hybrid automatic retransmission response message to the base station;

The total number of downlink downlink allocations is the number of physical downlink shared channels corresponding to downlink control information in the same carrier set, or the number of physical downlink control channels released by downlink semi-persistent scheduling in the same carrier set, or the same carrier set. The sum of the number of physical downlink shared channels corresponding to each downlink control information and the number of physical downlink control channels released by downlink semi-persistent scheduling.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the carrier includes a primary carrier and at least one secondary carrier, where the primary carrier constitutes one carrier group, and each secondary carrier constitutes at least one carrier group, and the processing is performed. The module is configured to perform compression processing on the first hybrid automatic retransmission response message according to the carrier grouping information to generate a hybrid automatic retransmission response message, including:

Obtaining first downlink control information corresponding to the number of each carrier in each carrier packet according to the carrier group information, and performing response information of the physical downlink shared channel corresponding to the first downlink control information in the same carrier group Logic AND operation, generating a second hybrid automatic retransmission response message, where the second hybrid automatic retransmission response message includes response information corresponding to each carrier group;

And arranging response information corresponding to each carrier group according to the number of each carrier group Sequence, generate a hybrid automatic retransmission response message.

With reference to the first aspect, in a second possible implementation manner of the first aspect, the carrier includes a primary carrier and at least one secondary carrier, each carrier packet does not include the primary carrier, and the processing module is configured to group according to the carrier The information is compressed by the first hybrid automatic retransmission response message to generate a hybrid automatic retransmission response message, including:

Obtaining first downlink control information corresponding to the number of each carrier in each carrier packet according to the carrier group information, and performing response information of the physical downlink shared channel corresponding to the first downlink control information in the same carrier group Logic AND operation, generating a third hybrid automatic retransmission response message, where the third hybrid automatic retransmission response message includes response information corresponding to each carrier group;

Sorting, according to the number of each carrier group, the response information corresponding to each carrier group to obtain a fourth hybrid automatic retransmission response message, according to the response information of the physical downlink shared channel corresponding to the primary carrier, and the fourth The hybrid automatic repeat response message generates a hybrid automatic repeat response message.

In combination with the first aspect or the first possible implementation of the first aspect or the second possible implementation of the first aspect, in a third possible implementation of the first aspect, the processing module is configured to The downlink hybrid allocation total, the downlink allocation index of each first downlink control information, and the physical downlink shared channel corresponding to the first downlink control information, generate a first hybrid automatic retransmission response message, including:

And generating, according to whether the decoding of the physical downlink shared channel corresponding to the first downlink control information is correct, the response information of the physical downlink shared channel corresponding to each first downlink control information is generated;

Sorting the downlink allocation index of each of the first downlink control information to obtain a ranking result, determining the second downlink control information according to the ranking result and the total number of downlink allocations, and acquiring a downlink allocation index of the second downlink control information, The response information of the physical downlink shared channel corresponding to the second downlink control information is a non-acknowledgment NACK;

Generating the first hybrid automatic retransmission response message according to the response information of the physical downlink shared channel corresponding to the first downlink control information and the response information of the physical downlink shared channel corresponding to the second downlink control information, where the first a sequence of discharging the response information of the physical downlink shared channel corresponding to the first downlink control information and the response sequence of the response information of the physical downlink shared channel corresponding to the second downlink control information in the hybrid automatic retransmission response message, and the first The downlink control information and the downlink allocation index of the second downlink control information are in the same order.

In a second aspect, an embodiment of the present invention provides a base station, including:

a sending module, configured to send radio resource control RRC configuration information to the user equipment, where the RRC configuration information carries carrier group information, where the carrier group information includes a number of each carrier group in the same carrier set and a number of each carrier in each carrier group ;

The sending module is further configured to send, to the user equipment, at least one first downlink control information, where each first downlink control information carries a downlink allocation index, and at least one of the first downlink control information further carries a downlink allocation total;

a receiving module, configured to receive, by the user equipment, a hybrid automatic retransmission response message, where the hybrid automatic retransmission response message is a downlink allocation index of the user equipment according to the total number of downlink allocations and each first downlink control information, Generating the physical downlink shared channel corresponding to each of the first downlink control information and the carrier group information;

The total number of downlink downlink allocations is the number of physical downlink shared channels corresponding to downlink control information in the same carrier set, or the number of physical downlink control channels released by downlink semi-persistent scheduling in the same carrier set, or The sum of the number of physical downlink shared channels corresponding to the downlink control information and the number of physical downlink control channels released by the downlink semi-persistent scheduling in the same carrier set.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the hybrid automatic retransmission message includes response information corresponding to each carrier group, where the carrier packet includes a packet including only a primary carrier;

The base station further includes a processing module, configured to retransmit each carrier in the carrier group if the response information corresponding to the carrier group is not acknowledged.

With reference to the second aspect, in a second possible implementation manner of the second aspect, the hybrid automatic retransmission message includes response information of a physical downlink shared channel corresponding to the primary carrier and response information corresponding to each carrier group;

In a third aspect, an embodiment of the present invention provides a method for transmitting a hybrid automatic retransmission response message (HARQ-ACK), including:

Receiving radio resource control RRC configuration information sent by the base station, where the RRC configuration information carries carrier group information, where the carrier group information includes a number of each carrier group in the same carrier set and The number of each carrier in each carrier group;

Receiving at least one first downlink control information that is sent by the base station, where each first downlink control information carries a downlink allocation index, and at least one of the first downlink control information further carries a total number of downlink allocations;

And generating a first hybrid automatic retransmission response message according to the downlink allocation total, the downlink allocation index of each first downlink control information, and the physical downlink shared channel corresponding to each first downlink control information;

Sending the hybrid automatic repeat response message to the base station;

With reference to the third aspect, in a first possible implementation manner of the third aspect, the carrier includes a primary carrier and at least one secondary carrier, where the primary carrier constitutes one carrier group, and each secondary carrier constitutes at least one carrier group, The carrier grouping information is compressed by the first hybrid automatic retransmission response message to generate a hybrid automatic retransmission response message, including:

The response information corresponding to each carrier group is sorted according to the number of each carrier group, and a hybrid automatic repeat response message is generated.

With reference to the third aspect, in a second possible implementation manner of the third aspect, the carrier includes a primary carrier and at least one secondary carrier, and each carrier packet does not include the primary carrier, and the first The hybrid automatic retransmission response message is compressed to generate a hybrid automatic retransmission response message, including:

Obtaining, according to the carrier group information, first downlink control information corresponding to the number of each carrier in each carrier group, and physically corresponding to the first downlink control information in the same carrier group The acknowledgment information of the row shared channel is logically operated to generate a third hybrid automatic retransmission response message, where the third hybrid automatic retransmission response message includes response information corresponding to each carrier group;

With reference to the third aspect, or the first possible implementation manner of the third aspect, or the second possible implementation manner of the third aspect, in a third possible implementation manner of the third aspect, The first hybrid automatic retransmission response message is generated by the total number, the downlink allocation index of each first downlink control information, and the physical downlink shared channel corresponding to the first downlink control information, including:

A fourth aspect of the present invention provides a method for transmitting a hybrid automatic retransmission response message (HARQ-ACK), including:

Transmitting RRC configuration information to the user equipment, where the RRC configuration information carries carrier group information, where the carrier group information includes a number of each carrier group in the same carrier set and a number of each carrier in each carrier group;

Transmitting, by the user equipment, at least one first downlink control information, where each of the first downlink control information carries a downlink allocation index, and at least one of the first downlink control information further carries a total number of downlink allocations;

Receiving, by the user equipment, a hybrid automatic retransmission response message, where the hybrid automatic retransmission response message is a downlink allocation index of the user equipment according to the total downlink allocation, each first downlink control information, and the first a physical downlink shared channel corresponding to the downlink control information and the carrier group information generated by the downlink control information;

With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, the hybrid automatic retransmission message includes response information corresponding to each carrier group, where the carrier packet includes a packet including only a primary carrier;

The method further includes retransmitting each carrier in the carrier group if the response information corresponding to the carrier group is not acknowledged.

With reference to the fourth aspect, in a second possible implementation manner of the fourth aspect, the hybrid automatic retransmission message includes response information of a physical downlink shared channel corresponding to the primary carrier and response information corresponding to each carrier group;

In the embodiment of the present invention, the method for transmitting the automatic retransmission response message, the user equipment, and the base station, by receiving the carrier group information and the at least one first downlink control information sent by the base station, thereby obtaining the total downlink allocation and the first downlink control information. a downlink allocation index, which generates a first hybrid automatic retransmission response message according to the total downlink allocation, the downlink allocation index, and the physical downlink shared channel corresponding to each first downlink control information, and further automatically weights the first hybrid according to the carrier group information. The response message is compressed to generate a hybrid automatic retransmission response message. Since the hybrid automatic retransmission response message sent to the base station is a compressed message, the codebook size of the hybrid automatic retransmission response message fed back to the base station can be effectively reduced. Therefore, more downlink carrier aggregation can be implemented, and the number of carriers that overcome the downlink carrier aggregation is limited by the defect that the uplink control channel transmits the number of hybrid automatic retransmission acknowledgement message bits.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description of the drawings used in the embodiments or the prior art description will be briefly described below. Obviously, the drawings in the following description It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any inventive labor.

1 is a schematic structural diagram of Embodiment 1 of a user equipment according to the present invention;

2 is a schematic structural diagram of Embodiment 1 of a base station according to the present invention;

3 is a flowchart of Embodiment 1 of a method for transmitting a hybrid automatic retransmission response message HARQ-ACK according to the present invention;

FIG. 4 is a flowchart of Embodiment 2 of a method for transmitting a hybrid automatic retransmission response message HARQ-ACK according to the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

The embodiments of the present invention are mainly based on a carrier aggregation architecture. In the existing LTE system, the carrier is also referred to as a serving cell. The carrier in the present invention may be referred to as a serving cell. Carrier.

FIG. 1 is a schematic structural diagram of Embodiment 1 of a user equipment according to the present invention. As shown in FIG. 1 , the apparatus in this embodiment may include: a receiving module 11 , a processing module 12 , and a sending module 13 , where the receiving module 11 is configured to receive a base station and send Radio Resource Control (RRC) configuration information, the RRC configuration information carries carrier group information, where the carrier group information includes a number of each carrier group in the same carrier set and a number of each carrier in each carrier group, The receiving module 11 is further configured to receive at least one first downlink control information that is sent by the base station, where each first downlink control information carries a downlink allocation index, and at least one of the first downlink control information is further Carrying the total number of downlink allocations, the processing module 12 is configured to generate a first hybrid automatic weight according to the total downlink allocation, the downlink allocation index of each first downlink control information, and the physical downlink shared channel corresponding to each first downlink control information. Transmitting a response message, the first hybrid automatic retransmission response message includes response information of a physical downlink shared channel corresponding to each first downlink control information, and performing, by using the carrier grouping information, the first hybrid automatic retransmission response message The compression process generates a hybrid automatic repeat response message, and the sending module 13 is configured to send the hybrid automatic repeat response message to the base station.

The base station divides a carrier set into a plurality of carrier groups, each carrier group includes at least one carrier, and the base station sends the carrier group information to the user equipment by using RRC configuration information, where the carrier group information includes a number of each carrier group in the carrier set. And the number of the carrier corresponding to the number of each carrier group. For example, the base station configures 16 carriers for the user equipment, and the number of each carrier is (0, 1, 2, ..., 15), and the carrier group information may be specifically (1;0), (2; 1, 2, 3), (3; 4, 5, 6), (4; 7, 8, 9), (5; 10, 11, 12), (6; 14 15), wherein (A; B ₁ ..... B _n ) represents a carrier group, A represents the number of the carrier group, and B ₁ ..... B _n represents the number of the carrier in the A carrier group, and thus it can be seen that The carrier set of the above example is divided into six groups.

The receiving module of the user equipment further receives at least one first downlink control information that is sent by the base station, where each of the first downlink control information carries a downlink allocation index, where at least one first downlink control information further carries a total downlink allocation, and downlink allocation The index refers to the number of the cumulative number of downlink allocations in the same carrier set. The total number of downlink allocations refers to the total number of downlink assignments of the same carrier set.

Specifically, the user equipment receives the RRC configuration information sent by the base station, and may obtain the carrier group information according to the RRC configuration information, where the user equipment further receives the at least one first downlink control information sent by the base station, and the user equipment receives the first downlink according to the received The control information may be obtained by obtaining a downlink allocation total and a downlink allocation index of each first downlink control information, where the user equipment corresponds to the downlink allocation total, the downlink allocation index of each first downlink control information, and each first downlink control information. The physical hybrid downlink shared channel generates a first hybrid automatic retransmission response message, where the first hybrid automatic retransmission response message includes the same number of response information as the total downlink allocation, and the first hybrid automatic retransmission response message packet The acknowledgment information is specifically ACK or NACK, that is, the total number of ACKs or NACKs in the first hybrid automatic repeat message is the same as the total number of downlink allocations, and the user equipment performs the first hybrid automatic retransmission response message according to the carrier group information. The compression process generates a hybrid automatic repeat response message, and sends the compressed first hybrid automatic repeat response message to the base station.

In the embodiment of the present invention, the downlink allocation index and the downlink allocation index of each first downlink control information are obtained by receiving the carrier group information and the at least one first downlink control information that are sent by the base station, according to the total downlink allocation and the downlink allocation. The first hybrid automatic retransmission response message is generated by the index and the physical downlink shared channel corresponding to the first downlink control information, and the first hybrid automatic retransmission response message is compressed according to the carrier group information to generate a hybrid automatic retransmission response message. The hybrid automatic retransmission response message sent to the base station is a compressed message, so that the codebook size of the hybrid automatic retransmission response message fed back to the base station can be effectively reduced, so that more downlink carrier aggregation can be used to overcome The number of carriers for downlink carrier aggregation is limited by the defect that the uplink control channel transmits the number of mixed automatic retransmission acknowledgement message bits.

On the basis of the structure diagram of the user equipment shown in FIG. 1 , the processing module 12 is specifically configured to perform compression processing on the first hybrid automatic retransmission response message according to the carrier group information to generate a hybrid automatic retransmission response message. There are two specific implementation methods, as follows:

The first carrier includes a primary carrier and at least one secondary carrier, where the primary carrier forms a carrier group, and each secondary carrier constitutes at least one carrier group, that is, the primary carrier is a single carrier group, and the remaining secondary carriers form at least one carrier group. .

The processing module 12 is configured to perform a compression process on the first hybrid automatic retransmission response message according to the carrier grouping information to generate a hybrid automatic retransmission response message, where the method may be: acquiring each carrier group according to the carrier group information. The first downlink control information corresponding to the number of each carrier, and logically and responsive to the response information of the physical downlink shared channel corresponding to the first downlink control information in the same carrier group, to generate a second hybrid automatic retransmission a response message, the second hybrid automatic retransmission response message includes response information corresponding to each carrier group, and the response information corresponding to each carrier group is sorted according to the number of each carrier group to generate a hybrid automatic retransmission response message. .

For example, assume that the first hybrid automatic retransmission response message is 101101100, where the number of carriers corresponding to the response information of each bit is 0, 2, 3, 5, 6, 8, 9, 11, 13 respectively. The carrier group information of the first embodiment of the device is further illustrated by the carrier group information. The primary carrier number is 0, which is a group, the carrier number is 2, 3 is a group, the carrier number is 5, 6 is a group, the carrier number is 8, 9 is a group, the carrier And the grouping of the

numbers

11 and 13 is performed, and the second hybrid automatic retransmission reply message is generated by performing logical AND operation on the response information of the physical downlink shared channel corresponding to the first downlink control information in the same carrier group. 1, 0, 0, 1, 0, the number of carrier packets corresponding to each bit is 1, 2, 3, 4, 5, respectively, and the hybrid automatic generation generated by sorting the second hybrid automatic retransmission response message according to the number of the carrier grouping The retransmission reply message is 10010. It should be noted that the sorting may be in ascending order, or may be descending, or may be sorted by a certain rule, which is not limited thereto.

In the second mode, the carrier includes a primary carrier and at least one secondary carrier, and each carrier packet does not include the primary carrier, that is, the carrier packet does not include the primary carrier. That is, the primary carrier is not included in the carrier packet.

The processing module 12 is configured to perform a compression process on the first hybrid automatic retransmission response message according to the carrier grouping information to generate a hybrid automatic retransmission response message, where the method may be: acquiring each carrier group according to the carrier group information. The first downlink control information corresponding to the number of each carrier, and logically and responsive to the response information of the physical downlink shared channel corresponding to the first downlink control information in the same carrier group, to generate a third hybrid automatic retransmission a response message, the third hybrid automatic retransmission response message includes response information corresponding to each carrier group; and the response information corresponding to each carrier group is sorted according to the number of each carrier group to obtain a fourth hybrid automatic retransmission response And generating a hybrid automatic repeat response message according to the response information of the physical downlink shared channel corresponding to the first downlink control information corresponding to the primary carrier and the fourth hybrid automatic repeat response message.

For example, it is assumed that the first hybrid automatic retransmission response message is 101101100, and the number of the carrier corresponding to the response information of each bit is 0, 2, 3, 5, 6, 8, 9, 11, 13 respectively. The primary carrier number is 0, the corresponding response information is 1, and the carrier group information is (1; 1, 2, 3), (2; 4, 5, 6), (3; 7, 8, 9), ( 4; 10, 11, 12), (5; 14, 15) for example, according to the carrier grouping information, the primary carrier is not counted in the carrier group, the carrier number is 2, 3 is a group, the carrier number is 5, 6 is a group, the carrier number is 8 and 9 is a group, and the carrier number is 11 and 13 is a group, then the physical downlink corresponding to the first downlink control information in the same carrier group The response information of the shared channel is logically AND operated to generate a third hybrid automatic repeat response message, that is, 0, 0, 1, 0, and the number of carrier packets corresponding to each bit is 1, 2, 3, and 4, respectively, according to carrier grouping. The fourth hybrid automatic retransmission response message generated after the number is sorted by the third hybrid automatic retransmission response message is 10010. It should be noted that the sorting can Ascending order can also be sorted in descending order, or it can be sorted by certain rules, which is not limited here. And generating a hybrid automatic retransmission response message according to the response information 1 of the physical downlink shared channel corresponding to the primary carrier and the fourth hybrid automatic retransmission response message, where the hybrid automatic retransmission response message is 10010.

On the basis of the two specific implementation manners of the first embodiment of the user equipment and the first embodiment, the processing module 12 of the user equipment is configured to use the downlink allocation total and the downlink allocation index of each first downlink control information. And generating, by the physical downlink shared channel corresponding to the first downlink control information, a first hybrid automatic retransmission response message, where the decoding may be performed according to the decoding of the physical downlink shared channel corresponding to each first downlink control information. And generating the response information of the physical downlink shared channel corresponding to the first downlink control information; sorting the downlink allocation index of each first downlink control information to obtain a sorting result, and determining, according to the sorting result and the total number of downlink allocations The second downlink control information is obtained, and the downlink allocation index of the second downlink control information is obtained, and the response information of the physical downlink shared channel corresponding to the second downlink control information is a non-acknowledgement NACK; corresponding to each first downlink control information. The acknowledgment information of the physical downlink shared channel and the physical downlink corresponding to the second downlink control information The response information of the channel generates the first hybrid automatic retransmission response message, the response information of the physical downlink shared channel corresponding to each first downlink control information in the first hybrid automatic retransmission response message, and the second downlink control The order of the response information of the physical downlink shared channel corresponding to the information is the same as the order of the downlink allocation indexes of the first downlink control information and the second downlink control information.

Specifically, how to generate all PDSCHs in the same carrier set and/or PDCCH/ePDCCH indicating downlink SPS release according to the total downlink allocation (Total DAI) and the downlink allocation index (DAI) The first hybrid automatic retransmission response message (the first HARQ-ACK), the user equipment determines whether there is a PDCCH miss check according to the total downlink allocation and the downlink allocation index, and the first downlink control information and the second downlink are required to be described. The control information is the downlink control information DCI. Here, the first and second are only used to distinguish the downlink control information that is normally received and missed, that is, the second downlink control information is used to indicate the downlink control information that is missed. For example, the user equipment receives 5 DCIs, and the DAI of each DCI is 3, 1, 4, 6, and 7, respectively, and the total number of downlink allocations received is 9, first, according to the PDSCH corresponding to the received DCI. If the decoding is correct or not, the response information is generated. If the decoding is correct, the response information is 1 and then the DAI of the received DCI is sorted. The sorting result is 1, 3, 4, 6, and 7. The HARQ-ACK is 11111, and the HARQ-ACK at this time does not include the response information of the missed detection information. The method according to the embodiment of the present invention can determine that the downlink allocation index is 2, 5, 8, and 9 according to the ranking result and the total number of downlink allocations 9. If the downlink control information is missed, and the response information of the downlink control information of the missed detection is 0, the first HARQ-ACK is generated according to the response information of the downlink control information that is not missed and the downlink control information that is missed, the first HARQ - ACK is 101101100. It can be understood from the above example that the PDCCH miss detection can be judged by the total number of downlink allocations, and the location of the specific missed detection can be determined according to the DAI.

Further, the carrier grouping information is generated by the base station according to the downlink traffic volume and the data carrying capacity of the physical uplink control channel.

Therefore, the user equipment can determine the downlink control information of the missed detection by using the received downlink allocation total and the downlink allocation index, so that the number of mixed automatic retransmission message bits between the base station and the base station can be ensured to be consistent, and further sent according to the base station. The carrier group information can also flexibly control the codebook size of the hybrid automatic repeat message sent to the base station.

As can be understood from the foregoing embodiments, all the carriers configured for the user equipment are divided into several carrier groups, and the HARQ-ACK corresponding to each carrier of the same carrier group can be bundled (logical and operation), and between carriers between groups. The HARQ-ACK cannot be bundled, the primary carrier is not bundled with any subcarriers, or the primary carrier itself is a group.

The primary carrier is not bundled with the HARQ-ACK of other carriers because the primary carrier transmission is important control information of the user equipment. If the HARQ-ACK is bundled with other carriers, it is likely that the data of other carriers is always translated. The code error causes the HARQ-ACK to be always NACK. According to the logical AND operation, the bundled HARQ-ACK is NACK, then the data of the primary carrier also needs to be retransmitted continuously, and many control information has a certain time window. For example, random access response, timing advance command, etc., resulting in out-of-synchronization, and further may lead to the need for restart, data interruption, affecting the service performance of the user equipment.

The HARQ-ACKs in the carrier group can be bundled because the channel quality of some carriers is similar, for example, the interference environment is similar, for example, carriers with strong interference, for example, the carriers of the same carrier band are divided into one group, for example, all are unauthorized. The carrier is divided into a group. For example, all the carriers in a Radio Radio Head (RRH) are divided into one group, so the probability that they are both ACK or NACK is relatively large, so unnecessary retransmission will be less. The impact on downstream throughput is relatively small.

2 is a schematic structural diagram of Embodiment 1 of a base station according to the present invention. As shown in FIG. 2, the apparatus in this embodiment may include: a sending module 21 and a receiving module 22, where the sending module 21 is configured to send a radio resource control RRC to a user equipment. Configuration information, the RRC configuration information carries carrier group information, where the carrier group information includes a number of each carrier group in the same carrier set and a number of each carrier in each carrier group, and the sending module 21 is further configured to The user equipment sends at least one downlink control information, each downlink control information carries a downlink allocation index, and at least one of the downlink control information further carries a total number of downlink assignments, and the receiving module 22 is configured to receive the hybrid automatic retransmission response message sent by the user equipment. The hybrid automatic retransmission response message is a physical downlink shared channel corresponding to the downlink allocation index, the downlink allocation index of each first downlink control information, and the physical downlink shared channel corresponding to the first downlink control information, and the Carrier group information generated.

Optional, two implementations:

In a first mode, the hybrid automatic retransmission message includes response information corresponding to each carrier group, the carrier packet includes a packet including only a primary carrier, and the base station may further include a processing module 23, configured to: If the response information is not confirmed, each carrier in the carrier packet is retransmitted.

In the second mode, the hybrid automatic retransmission message includes the response information of the physical downlink shared channel corresponding to the primary carrier and the response information corresponding to each carrier packet. The base station may further include a processing module 23, configured to: if the carrier packet corresponds to If the response information is not confirmed, each carrier in the carrier packet is retransmitted.

Further, the processing module 23 is further configured to generate the carrier grouping information according to the downlink traffic volume and the data carrying capability of the physical uplink control channel. That is, the base station can adaptively configure the corresponding carrier group according to the channel quality of the downlink carrier and the uplink carrier, thereby implementing flexible control of the codebook size of the hybrid automatic retransmission response message, thereby enabling more downlink carrier aggregation to overcome the carrier of downlink carrier aggregation. The number is limited by the drawback of the uplink control channel.

In the embodiment of the present invention, the base station sends each downlink control information to the user equipment, and the downlink control The information carries the downlink allocation total and the downlink allocation index, so that the user equipment can determine the missed PDCCH according to the foregoing information, and the base station further sends carrier group information to the user equipment, thereby implementing flexible control of the codebook size of the hybrid automatic retransmission response message. .

FIG. 3 is a flowchart of Embodiment 1 of a method for transmitting a hybrid automatic retransmission response message HARQ-ACK according to the present invention. As shown in FIG. 3, the method in this embodiment may include:

Step 101: Receive radio resource control RRC configuration information sent by the base station, where the RRC configuration information carries carrier group information, where the carrier group information includes a number of each carrier group in the same carrier set and a number of each carrier in each carrier group.

Step 102: Receive at least one first downlink control information that is sent by the base station, where each first downlink control information carries a downlink allocation index, and at least one of the first downlink control information further carries a total downlink allocation.

Step 103: Generate a first hybrid automatic retransmission response message according to the total downlink allocation, the downlink allocation index of each first downlink control information, and the physical downlink shared channel corresponding to each first downlink control information.

Step 104: Perform compression processing on the first hybrid automatic retransmission response message according to the carrier group information to generate a hybrid automatic retransmission response message.

Step 105: Send the hybrid automatic repeat response message to the base station.

Further, the carrier includes a primary carrier and at least one secondary carrier, and the primary carrier constitutes one carrier group, and each of the secondary carriers constitutes at least one carrier group. Step 104 may specifically: obtain each carrier group according to the carrier group information. Corresponding to the first downlink control information corresponding to the number of each carrier, and logically ANDing the response information of the physical downlink shared channel corresponding to the first downlink control information in the same carrier group, to generate a second hybrid automatic repeat response message The second hybrid automatic repeat response message includes response information corresponding to each carrier group, and the response information corresponding to each carrier group is sorted according to the number of each carrier group to generate a hybrid automatic repeat response message.

Optionally, the carrier includes a primary carrier and at least one secondary carrier, and each carrier group does not include the primary carrier. The carrier may be configured to obtain, according to the carrier group information, first downlink control information corresponding to the number of each carrier in each carrier group, and corresponding to the first downlink control information in the same carrier group. The acknowledgment information of the physical downlink shared channel is logically operated to generate a third hybrid automatic retransmission response message, where the third hybrid automatic retransmission response message includes response information corresponding to each carrier group; The response information corresponding to each carrier group is sorted to obtain a fourth hybrid automatic retransmission response message, and hybrid automatic is generated according to the response information of the physical downlink shared channel corresponding to the primary carrier and the fourth hybrid automatic retransmission response message. Retransmit the reply message.

Further, the step 103 may be specifically: generating, according to whether the decoding of the physical downlink shared channel corresponding to the first downlink control information is correct, the response information of the physical downlink shared channel corresponding to each first downlink control information; The downlink allocation index of the first downlink control information is sorted to obtain a sorting result, and the second downlink control information is determined according to the sorting result and the total number of downlink allocations, and the downlink allocation index of the second downlink control information is obtained, where The response information of the physical downlink shared channel corresponding to the second downlink control information is a non-acknowledgement NACK; the response information of the physical downlink shared channel corresponding to each first downlink control information and the physical downlink shared channel corresponding to the second downlink control information The response information of the first hybrid automatic retransmission response message, the response information of the physical downlink shared channel and the second downlink control information corresponding to the first downlink control information in the first hybrid automatic retransmission response message The discharge order of the response information of the corresponding physical downlink shared channel, and the first The order of the downlink control index of the row control information and the second downlink control information is the same.

The method for transmitting the hybrid automatic retransmission response message HARQ-ACK provided in this embodiment is used to complete the processing of the user equipment shown in FIG. 1 , and the implementation principle and technical effects are similar, and details are not described herein again.

4 is a flowchart of Embodiment 2 of a method for transmitting a hybrid automatic retransmission response message HARQ-ACK according to the present invention. As shown in FIG. 4, the method in this embodiment may include:

Step 201: Send radio resource control RRC configuration information to the user equipment, where the RRC configuration information carries carrier group information, where the carrier group information includes a number of each carrier group in the same carrier set and a number of each carrier in each carrier group.

Step 202: Send at least one first downlink control information to the user equipment, where each first downlink control information carries a downlink allocation index, and at least one of the first downlink control information is further carried. The total number of downlink allocations.

Step 203: The user equipment is sent to send a hybrid automatic retransmission response message, where the hybrid automatic retransmission response message is the downlink allocation index of the first downlink control information, and the The physical downlink shared channel corresponding to each first downlink control information and the carrier group information are generated.

Further, the hybrid automatic retransmission message includes response information corresponding to each carrier group, and the carrier packet includes a packet including only a primary carrier. The method further includes: if the response information corresponding to the carrier packet is not acknowledged, Then, each carrier in the carrier packet is retransmitted.

Further, the hybrid automatic retransmission message includes response information of a physical downlink shared channel corresponding to the primary carrier and response information corresponding to each carrier group;

The method for transmitting the hybrid automatic retransmission response message HARQ-ACK provided in this embodiment is used to complete the processing of the base station shown in FIG. 2, and the implementation principle and technical effects are similar, and details are not described herein again.

It should be noted that the receiving module 11 in the embodiment of the present invention may correspond to the receiver of the user equipment, and may also correspond to the transceiver of the user equipment. The sending module 13 may correspond to a transmitter of the user equipment, or may correspond to a transceiver of the user equipment. The processing module 12 may correspond to a processor of the user equipment, where the processor may be a central processing unit (CPU), or an application specific integrated circuit (ASIC), or implement an embodiment of the present invention. One or more integrated circuits. The user equipment may further include a memory for storing the instruction code, the processor invoking the instruction code of the memory, and controlling the receiving module 11 and the transmitting module 13 in the embodiment of the present invention to perform the above operations.

The sending module 21 in the embodiment of the present invention may correspond to a transmitter of a base station, or may correspond to a transceiver of a base station. The receiving module 22 may correspond to a receiver of the base station, or may correspond to a transceiver of the base station. The processing module 23 can correspond to a processor of the base station, where the processor can be a The CPU, either an ASIC, or one or more integrated circuits implementing embodiments of the present invention. The base station may further include a memory for storing the instruction code, the processor invoking the instruction code of the memory, and controlling the transmitting module 21 and the receiving module 22 in the embodiment of the present invention to perform the above operations.

In the several embodiments provided by the present invention, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

The units described as separate components may or may not be physically separated, and the components displayed as the unit may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. . Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional units.

The above-described integrated unit implemented in the form of a software functional unit can be stored in a computer readable storage medium. The above software functional unit is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to perform the methods of the various embodiments of the present invention. Part of the steps. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program codes. .

A person skilled in the art can clearly understand that for the convenience and brevity of the description, only the division of each functional module described above is exemplified. In practical applications, the above function assignment can be completed by different functional modules as needed, that is, the device is installed. The internal structure is divided into different functional modules to perform all or part of the functions described above. For the specific working process of the device described above, refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that The technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the technical solutions of the embodiments of the present invention. range.

Claims

A user equipment, comprising:

a receiving module, configured to receive radio resource control RRC configuration information sent by the base station, where the RRC configuration information carries carrier group information, where the carrier group information includes a number of each carrier group in the same carrier set and a number of each carrier in each carrier group ;

The receiving module is further configured to receive at least one first downlink control information that is sent by the base station, where each first downlink control information carries a downlink allocation index, and at least one of the first downlink control information further carries a downlink allocation total;

a processing module, configured to generate a first hybrid automatic retransmission response message according to the total downlink allocation, the downlink allocation index of each first downlink control information, and the physical downlink shared channel corresponding to each first downlink control information;

Performing a compression process on the first hybrid automatic retransmission response message according to the carrier grouping information to generate a hybrid automatic retransmission response message;

a sending module, configured to send the hybrid automatic retransmission response message to the base station;

The total number of downlink downlink allocations is the number of physical downlink shared channels corresponding to downlink control information in the same carrier set, or the number of physical downlink control channels released by downlink semi-persistent scheduling in the same carrier set, or the same carrier set. The sum of the number of physical downlink shared channels corresponding to each downlink control information and the number of physical downlink control channels released by downlink semi-persistent scheduling.
The user equipment according to claim 1, wherein the carrier comprises a primary carrier and at least one secondary carrier, wherein the primary carrier constitutes one carrier group, each secondary carrier constitutes at least one carrier group, and the processing module is configured to use The carrier grouping information is compressed by the first hybrid automatic retransmission response message to generate a hybrid automatic retransmission response message, including:

Obtaining first downlink control information corresponding to the number of each carrier in each carrier packet according to the carrier group information, and performing response information of the physical downlink shared channel corresponding to the first downlink control information in the same carrier group Logic AND operation, generating a second hybrid automatic retransmission response message, where the second hybrid automatic retransmission response message includes response information corresponding to each carrier group;

The response information corresponding to each carrier group is sorted according to the number of each carrier group, and a hybrid automatic repeat response message is generated.
The user equipment according to claim 1, wherein the carrier comprises a primary carrier and at least one secondary carrier, each carrier packet does not include the primary carrier, and the processing module is configured to use The carrier grouping information is compressed by the first hybrid automatic retransmission response message to generate a hybrid automatic retransmission response message, including:

Obtaining first downlink control information corresponding to the number of each carrier in each carrier packet according to the carrier group information, and performing response information of the physical downlink shared channel corresponding to the first downlink control information in the same carrier group Logic AND operation, generating a third hybrid automatic retransmission response message, where the third hybrid automatic retransmission response message includes response information corresponding to each carrier group;

Sorting, according to the number of each carrier group, the response information corresponding to each carrier group to obtain a fourth hybrid automatic retransmission response message, according to the response information of the physical downlink shared channel corresponding to the primary carrier, and the fourth The hybrid automatic repeat response message generates a hybrid automatic repeat response message.
The user equipment according to claim 1 or 2 or 3, wherein the processing module is configured to use, according to the total number of downlink allocations, a downlink allocation index of each first downlink control information, and each of the first downlinks. The physical hybrid shared channel corresponding to the control information generates a first hybrid automatic retransmission response message, including:

And generating, according to whether the decoding of the physical downlink shared channel corresponding to the first downlink control information is correct, the response information of the physical downlink shared channel corresponding to each first downlink control information is generated;

Sorting the downlink allocation index of each of the first downlink control information to obtain a ranking result, determining the second downlink control information according to the ranking result and the total number of downlink allocations, and acquiring a downlink allocation index of the second downlink control information, The response information of the physical downlink shared channel corresponding to the second downlink control information is a non-acknowledgment NACK;

Generating the first hybrid automatic retransmission response message according to the response information of the physical downlink shared channel corresponding to the first downlink control information and the response information of the physical downlink shared channel corresponding to the second downlink control information, where the first a sequence of discharging the response information of the physical downlink shared channel corresponding to the first downlink control information and the response sequence of the response information of the physical downlink shared channel corresponding to the second downlink control information in the hybrid automatic retransmission response message, and the first The downlink control information and the downlink allocation index of the second downlink control information are in the same order.
A base station, comprising:

a sending module, configured to send radio resource control RRC configuration information to the user equipment, where the RRC configuration information carries carrier group information, where the carrier group information includes a number of each carrier group in the same carrier set and a number of each carrier in each carrier group ;

The sending module is further configured to send, to the user equipment, at least one first downlink control information, where each first downlink control information carries a downlink allocation index, and at least one of the first downlink control information further carries a downlink allocation total;

a receiving module, configured to receive, by the user equipment, a hybrid automatic retransmission response message, where the hybrid automatic retransmission response message is a downlink allocation index of the user equipment according to the total number of downlink allocations and each first downlink control information, Generating the physical downlink shared channel corresponding to each of the first downlink control information and the carrier group information;

The total number of downlink downlink allocations is the number of physical downlink shared channels corresponding to downlink control information in the same carrier set, or the number of physical downlink control channels released by downlink semi-persistent scheduling in the same carrier set, or The sum of the number of physical downlink shared channels corresponding to the downlink control information and the number of physical downlink control channels released by the downlink semi-persistent scheduling in the same carrier set.
The base station according to claim 5, wherein the hybrid automatic repeat message includes response information corresponding to each carrier group, and the carrier packet includes a packet including only a primary carrier;

The base station further includes a processing module, configured to retransmit each carrier in the carrier group if the response information corresponding to the carrier group is not acknowledged.
The base station according to claim 5, wherein the hybrid automatic repeat message includes response information of a physical downlink shared channel corresponding to the primary carrier and response information corresponding to each carrier group;

The base station further includes a processing module, configured to retransmit each carrier in the carrier group if the response information corresponding to the carrier group is not acknowledged.
A method for transmitting a hybrid automatic retransmission response message HARQ-ACK, comprising:

Receiving radio resource control RRC configuration information sent by the base station, where the RRC configuration information carries carrier group information, where the carrier group information includes a number of each carrier group in the same carrier set and a number of each carrier in each carrier group;

Receiving at least one first downlink control information that is sent by the base station, where each first downlink control information carries a downlink allocation index, and at least one of the first downlink control information further carries a total number of downlink allocations;

According to the total number of downlink allocations, the downlink allocation index of each first downlink control information, and the foregoing Generating, by the physical downlink shared channel corresponding to the first downlink control information, a first hybrid automatic retransmission response message;

Performing a compression process on the first hybrid automatic retransmission response message according to the carrier grouping information to generate a hybrid automatic retransmission response message;

Sending the hybrid automatic repeat response message to the base station;

The total number of downlink downlink allocations is the number of physical downlink shared channels corresponding to downlink control information in the same carrier set, or the number of physical downlink control channels released by downlink semi-persistent scheduling in the same carrier set, or the same carrier set. The sum of the number of physical downlink shared channels corresponding to each downlink control information and the number of physical downlink control channels released by downlink semi-persistent scheduling.
The method according to claim 8, wherein the carrier comprises a primary carrier and at least one secondary carrier, the primary carrier constitutes one carrier group, and each secondary carrier constitutes at least one carrier group, and the carrier group information is compared according to the carrier group. The first hybrid automatic retransmission response message is compressed to generate a hybrid automatic retransmission response message, including:

Obtaining first downlink control information corresponding to the number of each carrier in each carrier packet according to the carrier group information, and performing response information of the physical downlink shared channel corresponding to the first downlink control information in the same carrier group Logic AND operation, generating a second hybrid automatic retransmission response message, where the second hybrid automatic retransmission response message includes response information corresponding to each carrier group;

The response information corresponding to each carrier group is sorted according to the number of each carrier group, and a hybrid automatic repeat response message is generated.
The method according to claim 8, wherein the carrier comprises a primary carrier and at least one secondary carrier, each carrier packet does not include the primary carrier, and the first hybrid automatic retransmission response message is sent according to the carrier grouping information. Perform compression processing to generate a hybrid automatic retransmission response message, including:

Obtaining first downlink control information corresponding to the number of each carrier in each carrier packet according to the carrier group information, and performing response information of the physical downlink shared channel corresponding to the first downlink control information in the same carrier group Logic AND operation, generating a third hybrid automatic retransmission response message, where the third hybrid automatic retransmission response message includes response information corresponding to each carrier group;

Sorting, according to the number of each carrier group, the response information corresponding to each carrier group to obtain a fourth hybrid automatic retransmission response message, according to the response information of the physical downlink shared channel corresponding to the primary carrier, and the fourth Hybrid automatic retransmission response message generates hybrid automatic retransmission acknowledgement interest.
The method according to claim 8 or 9 or 10, wherein the physical quantity corresponding to the downlink allocation total, the downlink allocation index of each first downlink control information, and the first downlink control information The downlink shared channel generates a first hybrid automatic retransmission response message, including:

And generating, according to whether the decoding of the physical downlink shared channel corresponding to the first downlink control information is correct, the response information of the physical downlink shared channel corresponding to each first downlink control information is generated;

Sorting the downlink allocation index of each of the first downlink control information to obtain a ranking result, determining the second downlink control information according to the ranking result and the total number of downlink allocations, and acquiring a downlink allocation index of the second downlink control information, The response information of the physical downlink shared channel corresponding to the second downlink control information is a non-acknowledgment NACK;

Generating the first hybrid automatic retransmission response message according to the response information of the physical downlink shared channel corresponding to the first downlink control information and the response information of the physical downlink shared channel corresponding to the second downlink control information, where the first a sequence of discharging the response information of the physical downlink shared channel corresponding to the first downlink control information and the response sequence of the response information of the physical downlink shared channel corresponding to the second downlink control information in the hybrid automatic retransmission response message, and the first The downlink control information and the downlink allocation index of the second downlink control information are in the same order.
A method for transmitting a hybrid automatic retransmission response message HARQ-ACK, comprising:

Transmitting RRC configuration information to the user equipment, where the RRC configuration information carries carrier group information, where the carrier group information includes a number of each carrier group in the same carrier set and a number of each carrier in each carrier group;

Transmitting, by the user equipment, at least one first downlink control information, where each of the first downlink control information carries a downlink allocation index, and at least one of the first downlink control information further carries a total number of downlink allocations;

Receiving, by the user equipment, a hybrid automatic retransmission response message, where the hybrid automatic retransmission response message is a downlink allocation index of the user equipment according to the total downlink allocation, each first downlink control information, and the first a physical downlink shared channel corresponding to the downlink control information and the carrier group information generated by the downlink control information;

The total number of downlink allocations is the number of physical downlink shared channels corresponding to downlink control information in the same carrier set, or the downlink semi-persistent scheduling release in the same carrier set. The sum of the number of downlink control channels, the number of physical downlink shared channels corresponding to each downlink control information in the same carrier set, and the number of physical downlink control channels released by downlink semi-persistent scheduling.
The method according to claim 12, wherein the hybrid automatic repeat message comprises response information corresponding to each carrier group, and the carrier group includes a packet including only a primary carrier;

The method further includes retransmitting each carrier in the carrier group if the response information corresponding to the carrier group is not acknowledged.
The method according to claim 12, wherein the hybrid automatic repeat message includes response information of a physical downlink shared channel corresponding to the primary carrier and response information corresponding to each carrier group;

The method further includes retransmitting each carrier in the carrier group if the response information corresponding to the carrier group is not acknowledged.