CN102104461B

CN102104461B - Space merge configuration and response information feedback method, system and equipment

Info

Publication number: CN102104461B
Application number: CN 201110074398
Authority: CN
Inventors: 高雪娟; 沈祖康; 林亚男
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2011-03-25
Filing date: 2011-03-25
Publication date: 2013-04-10
Anticipated expiration: 2031-03-25
Also published as: CN102104461A; WO2012130105A1

Abstract

The embodiment of the invention discloses a space merge configuration and response information feedback method, a space merge configuration and response information feedback system and space merge configuration and response information feedback equipment, relates to the technical field of wireless communication, and is used for flexibly configuring information whether to perform space merge on the response information of downlink carriers for a terminal. In the invention, a base station determines whether the terminal needs to perform space merge on the response information of the downlink carriers; and the base station transmits configuration information whether to perform space merge on the response information of the downlink carriers to the terminal according to a determined result. The base station can flexibly configure that whether the terminal performs space merge on the response information of the downlink carriers according to the need.

Description

Space merging configuration and response information feedback method, system and equipment

Technical Field

The present invention relates to the field of wireless communications, and in particular, to a method, a system, and a device for spatial merge configuration and response information feedback.

Background

For a long term evolution multi-carrier system, to support a wider system bandwidth than a Long Term Evolution (LTE) system, such as 100MHz, one possibility is to directly allocate a spectrum of 100M bandwidth, as shown in fig. 1; one possibility is to aggregate some frequency spectrums allocated to the existing system to make a large bandwidth for the lte multi-carrier system, where the uplink and downlink carriers in the system may be configured asymmetrically, that is, the user may occupy N ≧ 1 carrier for downlink transmission and M ≧ 1 carrier for uplink transmission, as shown in fig. 2.

Currently, it is determined that a long term evolution advanced (LTE-a) system can support 5 carriers at most for aggregation, and a terminal (UE) in one LTE-a Time Division Duplex (TDD) system needs to feed back acknowledgement/negative acknowledgement (ACK/NACK) information corresponding to a plurality of downlink carriers and downlink subframes in the same uplink subframe. For a TDD system, the number of downlink subframes that need to perform ACK/NACK feedback in the same uplink subframe is defined as M, and the M has different values for different uplink subframes and different uplink and downlink configurations, as shown in table 1, the number of k values corresponding to each uplink subframe is the number of downlink subframes that need to perform ACK/NACK feedback in the uplink subframe by the UE. After the UE completes demodulation and decoding of the data on the downlink subframe n-k, the UE feeds back information (i.e., ACK/NACK) whether the data on the downlink subframe needs to be retransmitted to the base station on the uplink subframe n.

TABLE 1

In the LTE-A system, the ACK/NACK information is transmitted by multiplexing a physical uplink control channel format3 (PUCCHFIormat 3) and a physical uplink control channel format1b (PUCCHFIMAT 1b with channel selection) with channel selection. The maximum transmission bit number of pucchfmat 3 is 20 bits, the maximum transmission bit number of pucchfmat 1b with channel selection is 4 bits, and when the bit number of ACK/NACK information to be fed back is greater than the maximum transmission bit number of the transmission scheme, spatial combination needs to be performed on ACK/NACK information corresponding to a downlink carrier adopting a multi-codeword (i.e., 2 codewords) transmission mode, so as to reduce the transmission bit number of the ACK/NACK information.

The spatial combination is to perform logical addition on ACK/NACK information of multiple codewords in one downlink subframe of a downlink carrier with a transmission mode of multiple codewords. In the ACK/NACK multiplexing transmission in an LTE release 8 (Rel-8) system, when multi-code word transmission is carried out and M is larger than 1, the ACK/NACK information of the multi-code words is subjected to spatial combination by default.

In the process of implementing the invention, the inventor finds that the following technical problems exist in the prior art:

because an ACK/NACK feedback scheme in an LTE-A system supports transmission of different ACK/NACK feedback bit numbers, if an LTE Rel-8 multiplexing mode is used, ACK/NACK information corresponding to all multi-code words with M being greater than 1 is always subjected to spatial combination, and for the scheme supporting transmission of a large feedback bit number, retransmission times are increased, and system throughput is influenced.

Disclosure of Invention

The embodiment of the invention provides a method and equipment for spatial combination configuration, which are used for providing a scheme that a base station flexibly configures information whether to carry out spatial combination on response information of downlink carriers to a terminal.

A spatial merge configuration method, the method comprising:

the base station determines whether a terminal is required to perform spatial combination on response information of each downlink carrier;

the base station sends configuration information whether to spatially combine the response information of the downlink carrier waves to the terminal through a high-level signaling according to the determination result;

the base station issues the configuration information to the terminal through a high-level signaling, and the method specifically includes:

the base station respectively issues configuration information whether to spatially combine the response information of the downlink carriers to the terminal through a high-level signaling for each downlink carrier; or,

the base station selects a downlink carrier set from a plurality of downlink carrier sets which are configured in advance or agreed with the terminal in advance for spatial combination, and sends the information of the selected downlink carrier set to the terminal through a high-level signaling so as to indicate the terminal to perform spatial combination on the response information of all downlink carriers in the downlink carrier set; or,

the base station selects a downlink carrier set from a plurality of downlink carrier sets which are configured in advance or agreed with the terminal in advance and are not subjected to space combination, and sends the information of the selected downlink carrier set to the terminal through a high-level signaling so as to indicate the terminal not to perform space combination on the response information of all downlink carriers in the downlink carrier set; or,

and the base station transmits a high-level signaling to the terminal, wherein the high-level signaling carries independent configuration information for judging whether the terminal performs spatial combination on the response information of the downlink carrier aiming at a plurality of downlink carriers.

A spatial merge configuration method, the method comprising:

the base station sends configuration information whether to spatially combine the response information of the downlink carrier to the terminal through a Physical Downlink Control Channel (PDCCH) signaling according to the determination result;

the base station issues the configuration information to the terminal through the PDCCH signaling, which specifically includes:

a base station transmits configuration information whether to perform spatial combination on response information of a downlink carrier scheduled by PDCCH signaling to a terminal through PDCCH signaling; or,

a base station sends configuration information whether to perform spatial combination on response information of a downlink carrier where PDCCH signaling is transmitted to a terminal through PDCCH signaling; or,

the base station selects a downlink carrier set from a plurality of downlink carrier sets which are configured in advance or agreed with the terminal in advance for spatial combination, and sends the information of the selected downlink carrier set to the terminal through a PDCCH (physical Downlink control channel) signaling so as to indicate the terminal to perform spatial combination on the response information of all downlink carriers in the downlink carrier set; or,

the base station selects a downlink carrier set from a plurality of downlink carrier sets which are configured in advance or agreed with the terminal in advance and are not subjected to space combination, and sends the information of the selected downlink carrier set to the terminal through PDCCH signaling so as to indicate the terminal not to perform space combination on the response information of all downlink carriers in the downlink carrier set.

A base station, the base station comprising:

a determining unit, configured to determine, for each downlink carrier, whether it is necessary for a terminal to perform spatial combination on response information of the downlink carrier;

a configuration unit, configured to issue configuration information whether to perform spatial merging on response information of a downlink carrier to a terminal through a high-level signaling according to a determination result;

the configuration unit is configured to:

for each downlink carrier, respectively issuing configuration information whether to spatially combine the response information of the downlink carrier to the terminal through a high-level signaling; or,

selecting a downlink carrier set from a plurality of downlink carrier sets which are configured in advance or agreed with a terminal in advance for space combination, and sending the information of the selected downlink carrier set to the terminal through a high-level signaling so as to indicate the terminal to perform space combination on response information of all downlink carriers in the downlink carrier set; or,

selecting a downlink carrier set from a plurality of downlink carrier sets which are configured in advance or agreed with a terminal in advance and are not subjected to space combination, and sending information of the selected downlink carrier set to the terminal through a high-level signaling so as to indicate that the terminal does not perform space combination on response information of all downlink carriers in the downlink carrier set; or,

and issuing a high-level signaling to the terminal, wherein the high-level signaling carries independent configuration information whether the terminal performs spatial combination on the response information of the downlink carrier aiming at a plurality of downlink carriers.

A base station, the base station comprising:

a configuration unit, configured to issue configuration information whether to perform spatial merging on response information of a downlink carrier to a terminal through a PDCCH signaling according to a determination result;

the configuration unit is configured to:

issuing configuration information whether to perform spatial combination on response information of downlink carriers scheduled by PDCCH signaling to a terminal through PDCCH signaling; or,

issuing configuration information whether to perform spatial combination on response information of a downlink carrier where the PDCCH signaling is transmitted to a terminal through a PDCCH signaling; or,

selecting a downlink carrier set from a plurality of downlink carrier sets which are configured in advance or agreed with a terminal in advance for space combination, and sending the information of the selected downlink carrier set to the terminal through a PDCCH (physical Downlink control channel) signaling so as to indicate the terminal to perform space combination on response information of all downlink carriers in the downlink carrier set; or,

selecting a downlink carrier set from a plurality of downlink carrier sets which are configured in advance or agreed with the terminal in advance and are not subjected to space combination, and sending the information of the selected downlink carrier set to the terminal through a PDCCH signaling so as to indicate the terminal not to perform space combination on the response information of all downlink carriers in the downlink carrier set.

By adopting the scheme, the base station can flexibly configure whether the terminal carries out space combination on the response information of the downlink carrier wave or not according to the requirement.

The embodiment of the invention also provides a feedback method, a system and equipment of the response information, which are used for providing a scheme that the terminal feeds back the response information according to the configuration of the base station.

A response information feedback method, the method comprising:

the terminal receives configuration information which is sent by a base station and used for carrying out space combination on response information of downlink carriers or not through a high-level signaling;

the terminal determines whether to perform spatial combination on the response information of the downlink carrier according to the configuration information, if so, the response information of the downlink carrier is fed back to the base station after being spatially combined, and if not, the response information of the downlink carrier is directly fed back to the base station;

the terminal determines whether to perform spatial combination on the response information of the downlink carrier according to the configuration information, and specifically includes:

the terminal receives the configuration information corresponding to each downlink carrier through a high-level signaling, and determines whether to perform spatial combination on the response information of the downlink carrier according to the configuration information of each downlink carrier; or,

the terminal determines a downlink carrier set according to the configuration information received through the high-level signaling, wherein the downlink carrier set is one of a plurality of downlink carrier sets which are pre-configured by the base station or pre-agreed with the base station to perform spatial combination, and the terminal determines to perform spatial combination on response information of each downlink carrier in the downlink carrier set; or,

the terminal determines a downlink carrier set according to the configuration information received through the high-level signaling, wherein the downlink carrier set is one of a plurality of downlink carrier sets which are pre-configured by the base station or pre-agreed with the base station and are not subjected to spatial combination, and the terminal determines that the response information of each downlink carrier in the downlink carrier sets is not subjected to spatial combination; or,

the terminal receives the configuration information through the high-level signaling, and the configuration information for multiple downlink carriers all carries independent configuration information indicating whether the terminal performs spatial combination on the response information of the downlink carriers, and the terminal determines whether to perform spatial combination on the response information of the corresponding downlink carriers according to the independent configuration information corresponding to each downlink carrier in the configuration information.

A response information feedback method, the method comprising:

the terminal receives configuration information which is sent by a base station and used for carrying out space combination on response information of a downlink carrier or not through a PDCCH signaling;

the terminal determines whether to perform spatial combination on response information of a downlink carrier scheduled by the PDCCH signaling according to configuration information carried in the PDCCH signaling; or,

the terminal determines whether to perform spatial combination on response information of a downlink carrier transmitting the PDCCH signaling according to configuration information carried in the PDCCH signaling; or,

the terminal determines a downlink carrier set according to the configuration information received through the PDCCH signaling, wherein the downlink carrier set is one of a plurality of downlink carrier sets which are pre-configured by the base station or pre-agreed with the base station to perform spatial combination, and the terminal determines to perform spatial combination on the response information of each downlink carrier in the downlink carrier set; or,

the terminal determines a downlink carrier set according to the configuration information received through the PDCCH signaling, wherein the downlink carrier set is one of a plurality of downlink carrier sets which are pre-configured by the base station or pre-agreed with the base station and are not subjected to space combination, and the terminal determines that the response information of each downlink carrier in the downlink carrier set is not subjected to space combination.

A terminal, the terminal comprising:

a receiving unit, configured to receive, through a high-level signaling, configuration information that is issued by a base station and used for determining whether to perform spatial merging on response information of a downlink carrier;

a determining unit, configured to determine, by the terminal, whether to perform spatial merging on response information of the downlink carrier according to the configuration information;

a feedback unit, configured to perform spatial combination on the response information of the downlink carrier and feed back the result to the base station if the determination unit determines that the response information of the downlink carrier is yes, and directly feed back the response information of the downlink carrier to the base station if the determination unit determines that the response information of the downlink carrier is not yes;

the determination unit is configured to:

respectively receiving the configuration information corresponding to each downlink carrier through a high-level signaling, and determining whether to perform spatial combination on the response information of each downlink carrier according to the configuration information of each downlink carrier; or,

determining a downlink carrier set according to the configuration information received through a high-level signaling, wherein the downlink carrier set is one of a plurality of downlink carrier sets which are pre-configured by the base station or pre-agreed with the base station to perform spatial combination, and the determining unit determines to perform spatial combination or not to perform spatial combination on response information of each downlink carrier in the downlink carrier sets; or,

determining a downlink carrier set according to the configuration information received through a high-level signaling, wherein the downlink carrier set is one of a plurality of downlink carrier sets which are pre-configured by the base station or pre-agreed with the base station and are not subjected to spatial combination, and the determining unit determines that the response information of each downlink carrier in the downlink carrier sets is not subjected to spatial combination; or,

and determining whether to spatially combine the response information of the corresponding downlink carrier according to the independent configuration information corresponding to each downlink carrier in the configuration information.

A terminal, the terminal comprising:

a receiving unit, configured to receive, through a PDCCH signaling, configuration information that is issued by a base station and used to perform spatial merging on response information of a downlink carrier;

the determination unit is configured to:

determining whether to perform spatial combination on response information of a downlink carrier scheduled by the PDCCH signaling according to configuration information carried in the PDCCH signaling; or,

determining whether to perform spatial combination on response information of a downlink carrier transmitting the PDCCH signaling according to configuration information carried in the PDCCH signaling; or,

determining a downlink carrier set according to the configuration information received through the PDCCH signaling, wherein the downlink carrier set is one of a plurality of downlink carrier sets which are pre-configured by the base station or pre-agreed with the base station to perform spatial combination, and the response information of each downlink carrier in the downlink carrier set is determined to be performed with spatial combination or not; or,

and determining a downlink carrier set according to the configuration information received through the PDCCH signaling, wherein the downlink carrier set is one of a plurality of downlink carrier sets which are pre-configured by the base station or pre-agreed with the base station and are not subjected to space combination, and the response information of each downlink carrier in the downlink carrier set is determined not to be subjected to space combination.

By adopting the scheme, the terminal can determine whether to perform spatial combination on the response information of the downlink carrier wave according to the configuration information issued by the base station, and then perform or not perform spatial combination on the response information before feeding back the response information according to the determination result, thereby realizing that the terminal feeds back the response information according to the configuration of the base station.

Drawings

FIG. 1 is a schematic diagram of a single frequency spectrum system of the prior art;

fig. 2 is a schematic diagram of a spectrum aggregation system in the prior art;

FIG. 3 is a schematic flow chart of a method provided by an embodiment of the present invention;

FIG. 4 is a schematic flow chart of another method provided by the embodiment of the present invention;

FIG. 5A is a schematic diagram of spatial merging according to a first embodiment of the present invention;

FIG. 5B is a schematic diagram of spatial merging according to a second embodiment of the present invention;

FIG. 6 is a schematic diagram of a system according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of an apparatus according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of another apparatus according to an embodiment of the present invention.

Detailed Description

In order to flexibly configure whether the terminal performs spatial merging on the response information of the downlink carrier, the embodiment of the invention provides a spatial merging configuration method.

Referring to fig. 3, the space merging configuration method provided in the embodiment of the present invention includes the following steps:

step 30: a base station determines whether a terminal is required to spatially combine response information of one or more downlink carriers configured or activated by UE (user equipment); the one or more downlink carriers may be downlink carriers employing a multiple codeword transmission mode;

the spatial combination of the response information of the downlink carrier refers to performing logical addition processing on the ACK/NACK information of each codeword in the same downlink subframe of the downlink carrier.

Step 31: and the base station transmits configuration information whether to perform spatial combination on the response information of the downlink carrier to the terminal according to the determination result.

In step 31, the base station may issue the configuration information to the terminal through a high-level signaling or a PDCCH signaling.

Specifically, the specific implementation that the base station issues the configuration information to the terminal through the high-level signaling may adopt the following four ways:

firstly, a base station sends configuration information whether to spatially combine response information of one or more downlink carriers to a terminal through a high-level signaling for each downlink carrier; each high-level signaling may carry 1-bit information for indicating whether the terminal performs spatial combination on the response information of the corresponding downlink carrier, where the 1-bit information specifically indicates whether the response information of which downlink carrier is to be spatially combined, and may be determined by the downlink carrier identifier carried in the high-level signaling, or of course, may be determined by determining the downlink carrier transmitting the high-level signaling, and then the 1-bit information indicates whether the response information of the downlink carrier is to be spatially combined.

Secondly, the base station selects a downlink carrier set from the downlink carrier sets which are configured in advance or agreed with the terminal in advance for spatial combination according to the determination result, and sends the information of the selected downlink carrier set to the terminal through a high-level signaling so as to indicate the terminal to perform spatial combination on the response information of all downlink carriers in the downlink carrier set; for example, the base station determines a downlink carrier corresponding to response information that needs to be spatially combined by the terminal among the one or more downlink carriers, selects a downlink carrier set only including the determined downlink carrier from one or more downlink carrier sets that are configured in advance or agreed with the terminal in advance to perform spatial combination, and issues the number information of the selected downlink carrier set to the terminal through a high-level signaling to instruct the terminal to perform spatial combination on the response information of the downlink carrier in the downlink carrier set;

thirdly, the base station selects a downlink carrier set from the downlink carrier sets which are configured in advance or agreed with the terminal in advance and are not subjected to space combination according to the determination result, and sends the information of the selected downlink carrier set to the terminal through a high-level signaling so as to indicate the terminal not to perform space combination on the response information of all downlink carriers in the downlink carrier set; for example, the base station determines a downlink carrier corresponding to response information which does not need the terminal to perform spatial combination in the one or more downlink carriers, selects a downlink carrier set only including the determined downlink carrier from one or more downlink carrier sets which are configured in advance or agreed with the terminal in advance to perform spatial combination, and issues the number information of the selected downlink carrier set to the terminal through a high-level signaling to indicate that the terminal does not perform spatial combination on the response information of the downlink carrier in the downlink carrier set;

fourthly, the base station issues a high-level signaling to the terminal, where each downlink carrier in the high-level signaling carries independent configuration information indicating whether the terminal performs spatial combination on the response information of the downlink carrier, for example, when there are 5 downlink carriers, the high-level signaling may carry 5 bits of information, and each bit of information indicates whether the response information of one downlink carrier needs to perform spatial combination.

The specific implementation that the base station issues the configuration information to the terminal through the PDCCH signaling can adopt the following four modes:

firstly, a base station issues configuration information whether to perform spatial combination on response information of downlink carriers scheduled by PDCCH signaling to a terminal through PDCCH signaling, namely the base station issues configuration information whether to perform spatial combination on the response information of the downlink carriers to the terminal through PDCCH signaling scheduling the downlink carriers for each downlink carrier in one or more downlink carriers;

secondly, the base station issues configuration information whether to perform spatial combination on the response information of the downlink carrier where the PDCCH signaling is transmitted to the terminal through the PDCCH signaling, that is, the base station issues configuration information whether to perform spatial combination on the response information of the downlink carrier to the terminal through the PDCCH signaling transmitted on the downlink carrier for each downlink carrier in the one or more downlink carriers;

thirdly, the base station selects a downlink carrier set from the downlink carrier sets which are configured in advance or agreed with the terminal in advance for spatial combination according to the determination result, and sends the information of the selected downlink carrier set to the terminal through a PDCCH signaling so as to indicate the terminal to perform spatial combination on the response information of all downlink carriers in the downlink carrier set. For example, the base station determines a downlink carrier corresponding to response information that needs to be spatially combined by the terminal among the one or more downlink carriers, selects a downlink carrier set only including the determined downlink carrier from one or more downlink carrier sets that are configured in advance or agreed with the terminal in advance to perform spatial combination, and issues the number information of the selected downlink carrier set to the terminal through PDCCH signaling to instruct the terminal to perform spatial combination on the response information of the downlink carrier in the downlink carrier set;

fourthly, the base station selects a downlink carrier set from the downlink carrier sets which are configured in advance or agreed with the terminal in advance and are not subjected to space combination according to the determination result, and sends the information of the selected downlink carrier set to the terminal through PDCCH signaling so as to indicate the terminal not to perform space combination on the response information of all downlink carriers in the downlink carrier set. For example, the base station determines a downlink carrier corresponding to response information that does not require the terminal to perform spatial combination in the one or more downlink carriers, selects a downlink carrier set that only includes the determined downlink carrier from one or more downlink carrier sets that are configured in advance or agreed with the terminal in advance and do not perform spatial combination, and issues the number information of the selected downlink carrier set to the terminal through PDCCH signaling to indicate that the terminal does not perform spatial combination on the response information of the downlink carrier in the downlink carrier set.

Specifically, when the base station issues configuration information indicating whether to perform spatial combination on response information of a downlink carrier scheduled by the PDCCH signaling to the terminal by scheduling the PDCCH signaling of the downlink carrier, the following four cases may be included:

firstly, a PDCCH signaling sent by a base station carries 1-bit information which is used for indicating a terminal to perform spatial combination or not to perform spatial combination on response information of all downlink carriers scheduled by the PDCCH signaling;

secondly, in a PDCCH signaling sent by a base station, each downlink carrier in all downlink carriers scheduled by the PDCCH signaling carries independent configuration information whether a terminal performs spatial combination on response information of the downlink carrier; for example, when 3 downlink carriers are scheduled by PDCCH signaling, the high layer signaling may carry 3 bits of information, and each bit of information indicates whether the response information of one downlink carrier needs to be spatially combined;

thirdly, the PDCCH signaling sent by the base station carries information of one downlink carrier set in a downlink carrier set which is configured in advance or agreed with the terminal in advance to perform spatial merging, so as to instruct the terminal to perform spatial merging on response information of all downlink carriers in the downlink carrier set; and each downlink carrier in the downlink carrier set which is configured in advance or combined with the terminal in advance in a space manner is a downlink carrier scheduled by the PDCCH signaling. For example, a PDCCH signaling sent by the base station carries number information of a downlink carrier set, where the downlink carrier set is a downlink carrier set that only includes a downlink carrier corresponding to response information that is scheduled by the PDCCH signaling and requires the terminal to perform spatial combination, and is selected from one or more downlink carrier sets configured in advance or agreed with the terminal in advance to perform spatial combination;

fourthly, the PDCCH signaling sent by the base station carries information of one downlink carrier set in a downlink carrier set which is configured in advance or agreed with the terminal in advance and is not subjected to spatial combination, so as to indicate the terminal not to perform spatial combination on response information of all downlink carriers in the downlink carrier set; and each downlink carrier in the downlink carrier set which is configured in advance or agreed with the terminal in advance and is not subjected to space combination is the downlink carrier scheduled by the PDCCH signaling. For example, the PDCCH signaling sent by the base station carries the number information of a downlink carrier set, where the downlink carrier set is a downlink carrier set that only includes a downlink carrier corresponding to response information scheduled by the PDCCH signaling and not requiring the terminal to perform spatial merging, and is selected from one or more downlink carrier sets that are configured in advance or agreed with the terminal in advance and not performing spatial merging.

Preferably, the base station may notify the terminal whether the configuration information issued by the PDCCH signaling is valid through a high-level signaling, that is, whether the terminal supports configuring the downlink carrier by using the PDCCH signaling to perform spatial merging on the response information.

The specific implementation in step 30 may be as follows:

when the base station determines that the terminal needs to perform spatial combination on the response information of one or more downlink carriers, the base station preferentially determines that the terminal needs to perform spatial combination on the response information of the downlink carriers of the downlink auxiliary carriers and/or the downlink carriers of the data packets with less time domain scheduling. For example:

the base station determines one or more downlink carriers which need to use the same uplink subframe to feed back response information, and determines whether the bit number of the uplink subframe to feed back the response information is larger than the maximum transmission bit number when the terminal does not perform space combination; if so, selecting part or all downlink carriers from the one or more downlink carriers, and determining that the terminal is required to spatially combine the response information of the selected downlink carriers, and not required to spatially combine the response information of the unselected downlink carriers, so that the bit number of the response information fed back by the terminal on the uplink subframe does not exceed the maximum transmission bit number; and when the determination is negative, determining that the terminal is not required to perform spatial combination on the response information of the one or more downlink carriers. When the base station selects part or all downlink carriers from the one or more downlink carriers, the base station preferentially selects downlink auxiliary carriers and/or downlink carriers with fewer data packets scheduled in a time domain.

In the method, the higher layer signaling may be: radio Resource Control (RRC) signaling or Medium Access Control (MAC) signaling. The PDCCH signaling can adopt a downlink control information format (DCIFormat) 2/2A/2B/2C.

Referring to fig. 4, an embodiment of the present invention further provides a response information feedback method, including the following steps:

step 40: the terminal receives configuration information which is sent by a base station and used for judging whether to carry out spatial combination on response information of downlink carriers;

step 41: and the terminal determines whether to perform spatial combination on the response information of the downlink carrier according to the configuration information, if so, the response information of the downlink carrier is subjected to spatial combination and then fed back to the base station, and if not, the response information of the downlink carrier is directly fed back to the base station.

In step 40, the terminal may receive the configuration information through a high layer signaling or a signaling PDCCH signaling.

Specifically, when the terminal receives the configuration information through a high-level signaling, in step 41, the terminal determines whether to perform spatial combination on the response information of the downlink carrier according to the configuration information, and the specific implementation may adopt the following four ways:

firstly, a terminal receives the configuration information corresponding to each downlink carrier through a high-level signaling, and determines whether to perform spatial combination on the response information of each downlink carrier according to the configuration information of each downlink carrier;

secondly, the terminal determines a downlink carrier set according to the configuration information received through the high-level signaling, wherein the downlink carrier set is one of a plurality of downlink carrier sets which are pre-configured by the base station or pre-agreed with the base station to perform spatial combination, and the terminal determines to perform spatial combination on response information of each downlink carrier in the downlink carrier set;

thirdly, the terminal determines a downlink carrier set according to the configuration information received through the high-level signaling, wherein the downlink carrier set is one of a plurality of downlink carrier sets which are pre-configured by the base station or pre-agreed with the base station and are not subjected to spatial combination, and the terminal determines that the response information of each downlink carrier in the downlink carrier sets is not subjected to spatial combination;

fourthly, the terminal receives the configuration information through the high-level signaling, and the configuration information aiming at the plurality of downlink carriers all carry independent configuration information which indicates whether the terminal performs space combination on the response information of the downlink carriers, and the terminal determines whether to perform space combination on the response information of the corresponding downlink carriers according to the independent configuration information corresponding to each downlink carrier in the configuration information.

When the terminal receives the configuration information through the PDCCH signaling, in step 41, the terminal determines whether to perform spatial combination on the response information of the downlink carrier according to the configuration information, and the specific implementation may adopt the following four ways:

firstly, a terminal determines whether to perform spatial combination on response information of a downlink carrier scheduled by a PDCCH (physical downlink control channel) signaling according to configuration information carried in the PDCCH signaling;

secondly, the terminal determines whether to perform spatial combination on response information of a downlink carrier transmitting the PDCCH signaling according to configuration information carried in the PDCCH signaling;

thirdly, the terminal determines a downlink carrier set according to the configuration information received through the PDCCH signaling, wherein the downlink carrier set is one of a plurality of downlink carrier sets which are pre-configured by the base station or pre-agreed with the base station to perform spatial combination, and the terminal determines to perform spatial combination on response information of each downlink carrier in the downlink carrier set;

fourthly, the terminal determines a downlink carrier set according to the configuration information received through the PDCCH signaling, wherein the downlink carrier set is one of a plurality of downlink carrier sets which are pre-configured by the base station or pre-agreed with the base station and are not subjected to space combination, and the terminal determines that the response information of each downlink carrier in the downlink carrier set is not subjected to space combination.

When the terminal determines whether to perform spatial combination on the response information of the downlink carrier scheduled by the PDCCH signaling according to the configuration information carried in the PDCCH signaling, there may be the following four cases:

firstly, a terminal determines to perform spatial combination or not to perform spatial combination on response information of all downlink carriers scheduled by the PDCCH according to 1-bit configuration information carried in the PDCCH signaling;

secondly, each downlink carrier in all downlink carriers scheduled by the terminal through the PDCCH signaling carries independent configuration information, and the terminal determines whether to perform spatial combination on response information of the corresponding downlink carrier according to the independent configuration information corresponding to each downlink carrier in the configuration information;

thirdly, the terminal determines a downlink carrier set according to the configuration information carried in the PDCCH signaling, where the downlink carrier set is one of multiple downlink carrier sets configured in advance by the base station or configured with the base station in advance for spatial combination, and the terminal determines to perform spatial combination on the response information of each downlink carrier in the downlink carrier set; a downlink carrier in a downlink carrier set which is configured in advance by each base station or is agreed with the base station in advance to carry out space combination is a downlink carrier scheduled by the PDCCH signaling;

fourthly, the terminal determines a downlink carrier set according to the configuration information carried in the PDCCH signaling, wherein the downlink carrier set is one of a plurality of downlink carrier sets which are pre-configured by the base station or pre-agreed with the base station and are not subjected to space combination, and the terminal determines that the response information of each downlink carrier in the downlink carrier sets is not subjected to space combination; and the downlink carrier in the downlink carrier set which is configured in advance by each base station or is not subjected to space combination appointed by the base station in advance is the downlink carrier scheduled by the PDCCH signaling.

Preferably, if the terminal receives the configuration information through the PDCCH signaling, before the terminal determines whether to spatially combine the response information of the downlink carrier according to the configuration information, the terminal may determine whether the configuration information sent by the base station through the PDCCH signaling is valid according to a notification sent by the base station through a high-level signaling; if the information is valid, determining whether to perform spatial combination on the response information of the downlink carrier according to the configuration information in the PDCCH signaling; and if the information is invalid, determining whether to perform space combination on the response information of the downlink carrier wave according to the configuration information in the PDCCH signaling.

In the method, the higher layer signaling may be: RRC signaling or MAC signaling. The PDCCH signaling can adopt a downlink control information Format (DCI Format) 2/2A/2B/2C.

The invention is illustrated below with reference to specific examples:

for an LTE-A system, when UE (user equipment) multiplexes and transmits ACK/NACK (acknowledgement/negative acknowledgement) in an uplink subframe, for downlink carriers of which the transmission mode is a multi-code-word transmission mode, whether the ACK/NACK information of the multi-code words on each downlink carrier is spatially combined or not can be configured, and a specific configuration method is as follows:

the method comprises the following steps: whether each downlink carrier carries out spatial combination on the ACK/NACK feedback information of the multiple code words or not is configured by high-level signaling in a semi-static mode.

The higher layer signaling may be RRC signaling or MAC layer signaling;

method 1-1: the high-level signaling can independently configure whether to spatially combine the ACK/NACK feedback information of the multiple code words for each downlink carrier;

1 bit in the configuration information of each downlink carrier indicates whether the downlink carrier performs spatial combination on the ACK/NACK feedback information of the multiple code words, that is, when the bit is "1", the downlink carrier performs spatial combination on the ACK/NACK feedback information of the multiple code words, and when the bit is "0", the downlink carrier does not perform spatial combination, and the above corresponding relationship is vice versa;

method 1-2: the high-level signaling informs the UE whether a downlink carrier set is subjected to spatial combination;

the K-bit high-level signaling can inform the UE of a downlink carrier set for carrying out ACK/NACK spatial combination or inform the UE of a downlink carrier set for not carrying out ACK/NACK spatial combination; the specific indication relationship may be predetermined by the base station and the UE;

a is the downlink carrier aggregation number pre-configured by the high-level signaling;

the downlink carrier set is one of a plurality of downlink carrier sets pre-configured for a high-level signaling or pre-agreed by the UE and the base station, and each downlink carrier set can be empty or at least comprises one downlink carrier;

the configuration of the downlink carrier set can be configured based on the carrier number;

methods 1 to 3: the high-level signaling configures whether to carry out spatial combination on the ACK/NACK feedback information of the multiple code words or not for a plurality of downlink carriers;

k bit high-level signaling configures whether ACK/NACK space combination is carried out on all downlink carriers configured/activated by the UE at the same time, a bitmap mode is adopted, K = N, N is the number of the downlink carriers aggregated or activated by the UE, each bit corresponds to one downlink carrier, when the bit is '1', the downlink carrier is used for carrying out space combination on ACK/NACK feedback information of a multi-code word, when the bit is '0', the downlink carrier is not used, and the corresponding relation is vice versa;

the method 2 comprises the following steps: whether each downlink carrier carries out spatial combination on the ACK/NACK feedback information of the multiple code words or not is dynamically configured by PDCCH signaling.

Method 2-1: k (K is more than or equal to 1) bits in the PDCCH indicate whether the downlink carrier scheduled by the PDCCH carries out spatial combination on the ACK/NACK feedback information or not;

the K bit can be the reuse of the original bit field in the PDCCH or the newly added bit field in the PDCCH;

when one PDCCH only schedules one downlink carrier in one subframe (LTE-A Rel-10 system), K =1, when 1 bit indicating ACK/NACK space combination in the PDCCH is '1', the downlink carrier is indicated to perform space combination on ACK/NACK feedback information, when the bit is '0', the downlink carrier is indicated to not perform space combination on the ACK/NACK feedback information of the multi-code words, and the corresponding relation is vice versa;

when one PDCCH can schedule multiple downlink carriers in one subframe:

k =1 bit, at this time, the 1 bit indicating the ACK/NACK spatial combination in the PDCCH is "1", the downlink carriers of all the multiple codeword transmission modes scheduled by the PDCCH are indicated to perform spatial combination on the ACK/NACK feedback information, the bit is "0", the downlink carriers of all the multiple codeword transmission modes scheduled by the PDCCH are indicated to not perform spatial combination on the ACK/NACK feedback information, and the above corresponding relationship is vice versa;

bit, B is a downlink carrier set number pre-configured by a high layer signaling, the downlink carrier set may be null, or includes at least one carrier in downlink carriers that a PDCCH can simultaneously schedule in a subframe;

k can also be the number of downlink carriers which can be simultaneously scheduled by one PDCCH in one subframe, at the moment, a bitmap mode can be adopted, each bit in K bits corresponds to one downlink carrier which can be simultaneously scheduled by the PDCCH, and whether the downlink carrier is subjected to ACK/NACK space combination or not is configured by the bit;

scheduling that contents indicated by K bit indication fields in a plurality of PDCCHs of a downlink sub-frame which corresponds to the same uplink sub-frame and performs ACK/NACK feedback on the downlink carrier are consistent;

if the difference is not consistent, the UE can be regarded as a scheduling error, and ACK/NACK space combination can be further carried out on the carrier waves configured by the PDCCH, so that the condition that the feedback bit number exceeds the transmission capacity is avoided;

or selecting one of the multiple PDCCHs according to a predetermined rule, for example, selecting the first PDCCH, the DAI =1 PDCCH, or the last PDCCH, and determining whether to perform ACK/NACK spatial combination on the downlink carrier according to an indication result of the K-bit field of the first PDCCH; when the total number of the ACK/NACK feedback bits exceeds the transmission capacity, the UE can be considered as a scheduling error, and can further perform spatial combination on the ACK/NACK of the downlink carriers of all the multi-code-word transmission modes for further feedback;

method 2-2: k bits (K = 1) in the PDCCH indicate whether the downlink carrier where the PDCCH is transmitted spatially combines ACK/NACK feedback information;

when the 1 bit indicating the ACK/NACK space combination in the PDCCH is '1', indicating a downlink carrier where the PDCCH is located to perform space combination on ACK/NACK feedback information, and when the bit is '0', indicating the downlink carrier not to perform space combination on the ACK/NACK feedback information, wherein the corresponding relation is vice versa;

the contents indicated by K bit indication fields in a plurality of PDCCHs transmitted in a downlink subframe which carries out ACK/NACK feedback corresponding to the same uplink subframe on the downlink carrier wave are consistent;

if the difference is not consistent, the UE can be regarded as an error, and ACK/NACK space combination can be further carried out on the carrier waves configured by the PDCCH so as to avoid the condition that the feedback bit number exceeds the transmission capacity; or,

selecting one of the plurality of PDCCHs according to a predetermined rule, for example, selecting the first PDCCH, DAI =1 PDCCH or the last PDCCH, and determining whether to perform ACK/NACK spatial combination on the downlink carrier according to an indication result of a K bit field of the PDCCH; when the total number of the ACK/NACK feedback bits exceeds the transmission capacity, the UE can be considered as a scheduling error, and can further perform spatial combination on the ACK/NACK of the downlink carriers of all the multi-code-word transmission modes for further feedback;

method 2-3: k bits (K is more than or equal to 1) in the PDCCH indicate whether a downlink carrier set carries out spatial combination on the ACK/NACK feedback information or not;

the K bit high-level signaling in the PDCCH can inform the UE of a downlink carrier set for carrying out ACK/NACK space combination or inform the UE of a downlink carrier set for not carrying out ACK/NACK space combination; the specific indication relationship may be predetermined by the base station and the UE;

the downlink carrier set is one of a plurality of downlink carrier sets pre-configured for a high-level signaling or pre-agreed by the UE and the base station, and can be null or at least comprise one downlink carrier;

the contents indicated by K bit indication fields in the PDCCHs transmitted in the plurality of downlink subframes are consistent, wherein the plurality of downlink carriers perform ACK/NACK feedback corresponding to the same uplink subframe;

selecting one of the plurality of PDCCHs according to a predetermined rule, for example, selecting the first PDCCH, DAI =1 PDCCH or the last PDCCH, and determining a downlink carrier for ACK/NACK space combination according to an indication result of a K bit field of the downlink carrier; when the total number of the ACK/NACK feedback bits exceeds the transmission capacity, the UE can be considered as a scheduling error, and can further perform spatial combination on the ACK/NACK of the downlink carriers of all the multi-code-word transmission modes for further feedback;

method 2-4: whether UE supports dynamic configuration of each downlink carrier by adopting PDCCH signaling or not is pre-configured by a high-level signaling to perform spatial combination on ACK/NACK feedback information of multiple code words;

the higher layer signaling may be RRC signaling or MAC layer signaling;

for example, 1 bit in the higher layer signaling is used to indicate whether the UE supports using PDCCH signaling to dynamically configure whether each downlink carrier performs ACK/NACK spatial combination, where the bit is "1" indicates support, and the bit is "0" indicates non-support, or vice versa;

when the high-level configuration UE can dynamically configure the ACK/NACK space combination of each downlink carrier by adopting PDCCH signaling, the notification mode of the PDCCH is as shown in methods 2-1, 2-2 and 2-3;

a bit field in the PDCCH for indicating whether each downlink carrier carries out ACK/NACK space combination is only effective when the high-level parameter configuration UE supports that each downlink carrier is dynamically configured by adopting PDCCH signaling to carry out ACK/NACK space combination;

in the method 2, when the PDCCH is used to dynamically configure the ACK/NACK spatial combination, the PDCCH mainly uses a DCIformat for scheduling downlink multiple codeword transmission, for example: DCIformat 2/2A/2B/2C;

in the method, the default configuration of each downlink carrier wave can be not to perform ACK/NACK spatial combination or perform ACK/NACK spatial combination; preferably, when the PDCCH signaling is adopted to dynamically configure whether each downlink carrier performs ACK/NACK spatial combination, each downlink default configuration is configured to perform ACK/NACK spatial combination, so that it can be avoided that the ACK/NACK feedback bit number exceeds the transmission capacity when the PDCCH configuring whether the downlink carrier performs spatial combination is lost.

In the configuration process of the method, the base station should preferentially perform ACK/NACK space combination on the downlink auxiliary carrier configuration, namely preferentially ensuring that the downlink main carrier does not perform ACK/NACK space combination;

preferably, when PDCCH dynamic configuration is adopted (i.e. method 2), the base station should preferentially configure the downlink carriers with fewer downlink sub-frames for time-domain uplink scheduling for spatial combination, i.e. preferentially ensure that the downlink carriers of more data packets for time-domain scheduling do not perform ACK/NACK spatial combination, so as to avoid unnecessary retransmission caused by combination; in the first downlink subframe for scheduling, the base station can preferentially determine that ACK/NACK space combination is carried out on downlink carriers which are not scheduled;

the above method is equally applicable to ACK/NACK transmission on PUCCH and PUSCH.

The above method is equally applicable to both FDD and TDD systems.

The first embodiment is as follows:

assuming that the downlink carrier 1 is a downlink primary carrier, fig. 5B shows an example of configuring ACK/NACK spatial combination by using the method 1 when downlink carriers 2 are aggregated. At this time, the default configuration of each downlink carrier is not to perform ACK/NACK spatial combining.

A base station end: configuring the ACK/NACK space combination of each downlink carrier wave through RRC signaling semi-statically; configuring a downlink carrier 1 to not carry out spatial combination, and configuring a downlink carrier 2 to carry out spatial combination;

method 1-1: configuring an RRC signaling set '0' corresponding to the 1-bit configuration ACK/NACK space combination of the downlink carrier 1 to indicate that the ACK/NACK space combination is not performed, and configuring an RRC signaling set '1' corresponding to the 1-bit configuration ACK/NACK space combination of the downlink carrier 2 to indicate that the ACK/NACK space combination is performed;

method 1-2: the RRC signaling configures a =3 downlink carrier sets in advance, where a set 1= { downlink carrier 1, downlink carrier 2}, a set 2= { downlink carrier 1}, and a set 3= { downlink carrier 2}, so that it is necessary to configure a set of a =3 downlink carriers

Bit RRC signaling, wherein the corresponding relation between each set and the RRC signaling is shown in table 2; the base station sends a carrier set 3 to the UE through RRC signaling, and the configuration only carries out ACK/NACK space combination on a downlink carrier 2, namely the base station sends 2-bit RRC signaling of '10';

downlink carrier aggregation	RRC message
		Set 1	00
Set 2	01
		Set 3	10
Reserved	11

TABLE 2

Methods 1 to 3: a base station informs UE of the configuration of whether all downlink carriers are subjected to ACK/NACK space combination or not through 1 RRC signaling in a bitmap mode, the number of the downlink carriers is N =2, namely K = N =2, the base station sends 2-bit RRC signaling to the UE to configure whether each downlink carrier is subjected to space combination or not, a first bit in the signaling corresponds to whether downlink carrier 1 is subjected to ACK/NACK space combination or not, a second bit corresponds to whether downlink carrier 2 is subjected to ACK/NACK space combination or not, namely the base station sends 2-bit RRC signaling '01', 0 indicates that space combination is not carried out, and 1 indicates that space combination is carried out;

the UE end:

method 1-1: receiving an RRC signaling corresponding to each downlink carrier, where an ACK/NACK spatial combination domain in the RRC signaling of the downlink carrier 1 is "0", the UE determines not to perform spatial combination on the downlink carrier 1, and an ACK/NACK spatial combination domain in the RRC signaling of the downlink carrier 2 is "1", and the UE determines to perform spatial combination on the downlink carrier 2, as shown in fig. 5A;

method 1-2: receiving the RRC signaling to obtain carrier set configuration information "10" for performing ACK/NACK spatial combination on 2 bits in the RRC signaling, and according to the corresponding relationship in table 2, the UE determines that only downlink carrier 2 is included in the carrier set, that is, only downlink carrier 2 is spatially combined, as shown in fig. 5A;

methods 1 to 3: receiving the RRC signaling, obtaining carrier set configuration information "01" for performing ACK/NACK spatial combination on 2 bits in the RRC signaling, and determining that only downlink carrier 2 is included in the carrier set according to the bitmap correspondence, that is, only spatial combination is performed on downlink carrier 2, as shown in fig. 5A.

Example two:

fig. 5B shows an example of configuring ACK/NACK spatial combination by method 2 when 4 downlink carriers are aggregated. Supporting cross-carrier scheduling, wherein the data transmission on the downlink carrier 2 can be scheduled by the PDCCH on the downlink carrier 1, the downlink carrier 1 is the downlink carrier, the data transmission on the downlink carrier can only be scheduled by the PDCCH on the downlink carrier 1, the downlink carriers 3 and 4 do not support cross-carrier scheduling, the data transmission on the downlink carrier 3 is scheduled by the PDCCH on the downlink carrier 3, and the data transmission on the downlink carrier 4 is scheduled by the PDCCH on the downlink carrier 4; at this time, the default configuration of each downlink carrier is to perform ACK/NACK spatial combining.

A base station end: dynamically configuring whether each downlink carrier carries out ACK/NACK space combination or not through PDCCH signaling, configuring downlink carriers 1 and 3 not to carry out space combination, and configuring downlink carriers 2 and 4 to carry out space combination;

method 2-1: a base station sends a PDCCH for scheduling a downlink carrier 1 on a downlink carrier 1 (a downlink main carrier), and sets a 1-bit ACK/NACK space combination indication field in the PDCCH to be 0, which indicates that the downlink carrier 1 scheduled by the PDCCH does not carry out ACK/NACK space combination; a base station sends a PDCCH for scheduling a downlink carrier 2 on a downlink carrier 1 (a downlink main carrier), sets a 1-bit ACK/NACK space combination indication field in the PDCCH to be 1, and indicates that the downlink carrier 2 scheduled by the PDCCH carries out ACK/NACK space combination; a base station sends a PDCCH for scheduling a downlink carrier 3 on the downlink carrier 3, and sets a 1-bit ACK/NACK space combination indication domain in the PDCCH to be 0, which indicates that the downlink carrier 3 scheduled by the PDCCH does not carry out ACK/NACK space combination; a base station sends a PDCCH for scheduling a downlink carrier 4 on the downlink carrier 4, sets a 1-bit ACK/NACK space combination indication domain in the PDCCH to be 1, and indicates that the downlink carrier 4 scheduled by the PDCCH carries out ACK/NACK space combination;

method 2-2: a base station sends a PDCCH for scheduling a downlink carrier 1 on a downlink carrier 1 (a downlink main carrier), and sets a 1-bit ACK/NACK space combination indication field in the PDCCH to be 0, which indicates that the downlink carrier 1 for transmitting the PDCCH does not carry out ACK/NACK space combination; a base station sends a PDCCH for scheduling a downlink carrier 2 on a downlink carrier 1 (a downlink main carrier), and sets a 1-bit ACK/NACK space combination indication field in the PDCCH to be 0, which indicates that the downlink carrier 1 for transmitting the PDCCH does not carry out ACK/NACK space combination; a base station sends a PDCCH for scheduling a downlink carrier 3 on the downlink carrier 3, and sets a 1-bit ACK/NACK space combination indication domain in the PDCCH to be 0, which indicates that the downlink carrier 3 transmitting the PDCCH does not carry out ACK/NACK space combination; a base station sends a PDCCH for scheduling a downlink carrier 4 on the downlink carrier 4, sets a 1-bit ACK/NACK space combination indication domain in the PDCCH to be 1, and indicates that the downlink carrier 4 transmitting the PDCCH carries out ACK/NACK space combination;

method 2-3: the RRC signaling configures a =5 downlink carrier sets in advance, where a set 1 is { downlink carrier 1, downlink carrier 2, downlink carrier 3, downlink carrier 4}, a set 2 is = { downlink carrier 1, downlink carrier 3}, a set 3 is = { downlink carrier 2, downlink carrier 4}, a set 4 is = { downlink carrier 1, downlink carrier 2}, and a set 5 is = { downlink carrier 1}, so that it is necessary to configure a =5 downlink carrier sets

Bit RRC signaling, wherein the corresponding relation between each set and the RRC signaling is shown in a table 3; the base station schedules the PDCCHs of the downlink carriers 1, 2, 3, and 4 transmitted on the downlink carriers 1, 3, and 4, and sets 3 bits in the PDCCHs to a downlink carrier set indicating that ACK/NACK spatial combination is not performed, that is, "001", which indicates that the downlink carriers 1 and 3 are not spatially combined;

downlink carrier	RRC message
		Set 1	000
Set 2	001
		Set 3	010
Set 4	011
		Set 5	100
Reserved	101
		Reserved	110
Reserved	111

TABLE 3

Method 2-4: the base station pre-configures UE to support adopting PDCCH to dynamically configure ACK/NACK space combination by RRC signaling, namely, the indication bit is '1' and is sent to the UE; then, the base station can configure whether each downlink carrier of the UE carries out ACK/NACK space combination or not through the PDCCH according to the method 2-1, 2-2 or 2-3, and specific contents are not repeated;

the UE end:

method 2-1: the method comprises the steps that UE receives a PDCCH for scheduling a downlink carrier 1 on the downlink carrier 1 (downlink main carrier), and determines that the ACK/NACK space combination is not carried out on the downlink carrier 1 scheduled by the PDCCH through a 1-bit ACK/NACK space combination indication domain in the PDCCH being '0'; the method comprises the steps that UE receives a PDCCH for scheduling a downlink carrier 2 on a downlink carrier 1 (a downlink main carrier), and determines to perform ACK/NACK space combination on the downlink carrier 2 scheduled by the PDCCH through a 1-bit ACK/NACK space combination indication domain in the PDCCH being '1'; the UE receives the PDCCH for scheduling the downlink carrier 3 on the downlink carrier 3, and determines that the ACK/NACK space combination is not carried out on the downlink carrier 3 scheduled by the PDCCH through the 1-bit ACK/NACK space combination indication domain in the PDCCH being '0'; the UE receives the PDCCH for scheduling the downlink carrier 4 on the downlink carrier 4, and determines to perform ACK/NACK spatial combination on the downlink carrier 4 scheduled by the PDCCH by setting a 1-bit ACK/NACK spatial combination indication field in the PDCCH to "1", as shown in fig. 5B;

method 2-2: the method comprises the steps that UE receives a PDCCH for scheduling a downlink carrier 1 on a downlink carrier 1 (a downlink main carrier), and determines that the ACK/NACK space combination is not carried out on the downlink carrier 1 for transmitting the PDCCH through a 1-bit ACK/NACK space combination indication domain in the PDCCH being '0'; the UE receives a PDCCH for scheduling a downlink carrier 2 on a downlink carrier 1 (a downlink main carrier), and determines not to perform ACK/NACK space combination on the downlink carrier 1 for transmitting the PDCCH according to the condition that a 1-bit ACK/NACK space combination indication domain in the PDCCH is '0'; since the downlink carrier 2 performs cross-carrier scheduling through the PDCCH on the downlink carrier 1, and the UE does not receive any PDCCH on the downlink carrier 2, it is not able to obtain dynamic configuration information on whether to perform ACK/NACK spatial combination on the downlink carrier 2, so that the UE operates the downlink carrier 2 according to a default ACK/NACK spatial combination attribute, that is, it is default to perform ACK/NACK spatial combination; the UE receives the PDCCH for scheduling the downlink carrier 3 on the downlink carrier 3, and determines that the AC K/NACK space combination is not carried out on the downlink carrier 3 for transmitting the PDCCH through the 1-bit ACK/NACK space combination indication domain in the PDCCH being '0'; the UE receives the PDCCH for scheduling the downlink carrier 4 on the downlink carrier 4, and determines to perform ACK/NACK spatial combination on the downlink carrier 4 transmitting the PDCCH by setting a 1-bit ACK/NACK spatial combination indication field in the PDCCH to "1", as shown in fig. 5B;

method 2-3: the UE firstly receives a =5 downlink carrier set, wherein the set 1= { downlink carrier 1, downlink carrier 2, downlink carrier 3 and downlink carrier 4}, the set 2= { downlink carrier 1, downlink carrier 3}, the set 3= { downlink carrier 2, downlink carrier 4}, the set 4= { downlink carrier 1, downlink carrier 2}, and the set 5= { downlink carrier 1}, which are configured in advance by an RRC signaling; the UE receives PDCCHs for scheduling downlink carriers 1, 2, 3, and 4 on downlink carriers 1, 3, and 4, determines that downlink carriers 1 and 3 are not spatially combined according to the correspondence in table 3 with a 3-bit indication field of a downlink carrier set indicating that ACK/NACK spatial combining is not performed in these PDCCHs being "001", as shown in fig. 5B;

method 2-4: the UE firstly receives an RRC signaling for configuring whether the UE adopts the PDCCH to dynamically configure the ACK/NACK space combination, determines to support the adoption of the PDCCH to dynamically configure the space combination according to the 1-bit RRC signaling being '1', namely a bit region for indicating the ACK/NACK space combination exists in the PDCCH, and further obtains the configuration information of the ACK/NACK space combination according to the indication region in the PDCCH by the UE according to the method 2-1, 2-2 or 2-3, and specific contents are not repeated.

Referring to fig. 6, an embodiment of the present invention further provides a wireless communication system, where the system includes:

a base station 60, configured to determine, for each downlink carrier of one or more downlink carriers configured or activated by the UE, whether a terminal is required to spatially combine response information of the downlink carrier; issuing configuration information whether to perform spatial combination on the response information of the downlink carrier to the terminal according to the determination result;

a terminal 61, configured to receive configuration information, which is sent by a base station and used for determining whether to perform spatial combination on response information of downlink carriers; and determining whether to perform spatial combination on the response information of the downlink carrier according to the configuration information, if so, performing spatial combination on the response information of the downlink carrier and feeding back the result to the base station, and if not, directly feeding back the response information of the downlink carrier to the base station.

Referring to fig. 7, an embodiment of the present invention further provides a base station, where the base station includes:

a determining unit 70, configured to determine, for each downlink carrier of one or more downlink carriers configured or activated by the UE, whether a terminal is required to spatially combine response information of the downlink carrier;

and a configuration unit 71, configured to issue configuration information indicating whether to perform spatial combination on the response information of the downlink carrier to the terminal according to the determination result.

The configuration unit 71 is configured to:

the configuration information is issued to the terminal through a high-level signaling; or, the configuration information is issued to the terminal through a Physical Downlink Control Channel (PDCCH) signaling.

The configuration unit 71 is configured to:

when the configuration information is issued to the terminal through the high-level signaling, the configuration information of whether to spatially combine the response information of the downlink carrier is issued to the terminal through the high-level signaling for each downlink carrier; or,

selecting a downlink carrier set from downlink carrier sets which are configured in advance or agreed with the terminal in advance for spatial combination according to a determination result, and sending the information of the selected downlink carrier set to the terminal through a high-level signaling so as to indicate the terminal to perform spatial combination on response information of all downlink carriers in the downlink carrier set; or,

selecting a downlink carrier set from downlink carrier sets which are configured in advance or agreed with the terminal in advance and are not subjected to space combination according to a determination result, and sending information of the selected downlink carrier set to the terminal through a high-level signaling so as to indicate the terminal not to perform space combination on response information of all downlink carriers in the downlink carrier set; or,

and sending a high-level signaling to the terminal, wherein the high-level signaling carries independent configuration information whether the terminal performs spatial combination on the response information of the downlink carrier or not for each downlink carrier.

The configuration unit 71 is configured to:

selecting a downlink carrier set from downlink carrier sets which are configured in advance or agreed with the terminal in advance for space combination according to a determination result, and sending information of the selected downlink carrier set to the terminal through a PDCCH (physical Downlink control channel) signaling so as to indicate the terminal to perform space combination on response information of all downlink carriers in the downlink carrier set; or,

and selecting a downlink carrier set from downlink carrier sets which are configured in advance or agreed with the terminal in advance and are not subjected to space combination according to a determination result, and sending the information of the selected downlink carrier set to the terminal through a PDCCH (physical Downlink control channel) signaling so as to indicate that the terminal does not perform space combination on the response information of all downlink carriers in the downlink carrier set.

The configuration unit 71 is configured to:

when the configuration information of whether the response information of the downlink carrier scheduled by the PDCCH signaling is subjected to spatial combination is issued to a terminal through the PDCCH signaling:

the sent PDCCH signaling carries 1-bit information and is used for indicating the terminal to perform spatial combination or not to perform spatial combination on the response information of all downlink carriers scheduled by the PDCCH signaling; or,

in the sent PDCCH signaling, each downlink carrier in all downlink carriers scheduled by the PDCCH signaling carries configuration information of whether a terminal performs spatial combination on response information of the downlink carrier; or,

the sent PDCCH signaling carries information of one downlink carrier set in a downlink carrier set which is configured in advance or agreed with a terminal in advance to carry out space combination so as to indicate the terminal to carry out space combination on response information of all downlink carriers in the downlink carrier set; each downlink carrier in the downlink carrier set which is configured in advance or agreed with the terminal in advance to carry out space combination is a downlink carrier scheduled by the PDCCH signaling; or

The sent PDCCH signaling carries information of one downlink carrier set in a downlink carrier set which is configured in advance or agreed with the terminal in advance and is not subjected to space combination, so as to indicate the terminal not to perform space combination on response information of all downlink carriers in the downlink carrier set; and each downlink carrier in the downlink carrier set which is configured in advance or agreed with the terminal in advance and is not subjected to space combination is the downlink carrier scheduled by the PDCCH signaling.

The base station further comprises:

a notifying unit 72, configured to notify, through a higher layer signaling, whether the configuration information sent by the terminal through the PDCCH signaling is valid.

The determining unit 70 is configured to:

when determining that the terminal needs to perform spatial combination on the response information of one or more downlink carriers, the base station preferentially determines that the terminal needs to perform spatial combination on the response information of the downlink carriers of the downlink auxiliary carriers and/or the downlink carriers of the data packets with less time domain scheduling.

The high-level signaling is as follows: radio resource control, RRC, signaling or medium access control, MAC, signaling.

Referring to fig. 8, an embodiment of the present invention further provides a terminal, where the terminal includes:

a receiving unit 80, configured to receive configuration information that is sent by the base station and used to determine whether to perform spatial combination on the response information of the downlink carrier;

a determining unit 81, configured to determine, by the terminal, whether to perform spatial merging on the response information of the downlink carrier according to the configuration information;

a feedback unit 82, configured to perform spatial combination on the response information of the downlink carrier and feed back the result to the base station if the determination unit determines that the response information of the downlink carrier is yes, and directly feed back the response information of the downlink carrier to the base station if the determination unit determines that the response information of the downlink carrier is not yes.

The receiving unit 80 is configured to:

receiving the configuration information through a high-level signaling; or, receiving the configuration information through Physical Downlink Control Channel (PDCCH) signaling.

The determination unit 81 is configured to:

when determining whether to perform spatial combination on the response information of the downlink carrier scheduled by the PDCCH signaling according to the configuration information carried in the PDCCH signaling:

determining whether to perform spatial combination or not to perform spatial combination on response information of all downlink carriers scheduled by the PDCCH according to 1-bit configuration information carried in the PDCCH signaling; or,

determining whether to perform spatial merging on response information of corresponding downlink carriers according to the independent configuration information corresponding to each downlink carrier in the configuration information if each downlink carrier in all downlink carriers scheduled by the PDCCH signaling carries independent configuration information in the configuration information received by the PDCCH signaling; or,

determining a downlink carrier set according to the configuration information in the PDCCH signaling, wherein the downlink carrier set is one of a plurality of downlink carrier sets which are pre-configured by the base station or pre-agreed with the base station to perform spatial combination, and the response information of each downlink carrier in the downlink carrier set is determined to perform spatial combination; a downlink carrier in a downlink carrier set which is configured in advance by each base station or is agreed with the base station in advance to carry out space combination is a downlink carrier scheduled by the PDCCH signaling; or,

determining a downlink carrier set according to the configuration information in the PDCCH signaling, wherein the downlink carrier set is one of a plurality of downlink carrier sets which are pre-configured by the base station or are agreed with the base station in advance and are not subjected to space combination, and the response information of each downlink carrier in the downlink carrier set is determined not to be subjected to space combination; and the downlink carrier in the downlink carrier set which is configured in advance by each base station or is not subjected to space combination appointed by the base station in advance is the downlink carrier scheduled by the PDCCH signaling.

The terminal further includes:

a determining unit 83, configured to determine, when the configuration information is received through the PDCCH signaling, whether the configuration information sent by the base station through the PDCCH signaling is valid according to a notification sent by the base station through a high-level signaling before the determining unit determines whether to perform spatial merging on the response information of the downlink carrier according to the configuration information;

the determination unit 81 is configured to:

and when determining that the configuration information issued by the base station through the PDCCH signaling is valid, determining whether to perform spatial combination on the response information of the downlink carrier according to the configuration information.

In conclusion, the beneficial effects of the invention include:

in the scheme provided by the embodiment of the invention, the base station sends configuration information whether to spatially combine the response information of the downlink carrier to the terminal, the terminal determines whether to spatially combine the response information of the downlink carrier according to the received configuration information, if so, the response information of the downlink carrier is spatially combined and then fed back to the base station, and if not, the response information of the downlink carrier is directly fed back to the base station. Therefore, by adopting the invention, the base station can flexibly configure whether the terminal performs spatial combination on the response information of the downlink carrier wave according to the requirement, and the terminal can determine whether to perform spatial combination on the response information of the downlink carrier wave according to the configuration of the base station, so that the bit number of the ACK/NACK information fed back by the terminal can be flexibly changed according to whether to perform spatial combination so as to adapt to different transmission schemes, thereby improving the ACK/NACK transmission efficiency, avoiding unnecessary retransmission and further improving the system performance. The invention is applicable to both FDD and TDD systems.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A spatial merge configuration method, comprising:

2. The method of claim 1, wherein the determining, for each downlink carrier, whether the terminal is required to spatially combine the response information of the downlink carrier by the base station comprises:

when the base station determines that the terminal needs to perform spatial combination on the response information of one or more downlink carriers, the base station preferentially determines that the terminal needs to perform spatial combination on the response information of the downlink carriers of the downlink auxiliary carriers and/or the downlink carriers of the data packets with less time domain scheduling.

3. The method of any of claims 1-2, wherein the higher layer signaling is:

radio resource control, RRC, signaling or medium access control, MAC, signaling.

4. A spatial merge configuration method, comprising:

5. The method of claim 4, wherein when the base station issues configuration information whether to spatially combine the response information of the downlink carrier scheduled by the PDCCH signaling to the terminal through the PDCCH signaling:

the PDCCH signaling sent by the base station carries 1-bit information and is used for indicating the terminal to perform spatial combination or not to perform spatial combination on the response information of all downlink carriers scheduled by the PDCCH signaling; or,

in a PDCCH signaling sent by a base station, each downlink carrier in all downlink carriers scheduled by the PDCCH signaling carries independent configuration information whether a terminal performs spatial combination on response information of the downlink carrier; or,

the PDCCH signaling sent by the base station carries information of one downlink carrier set in a downlink carrier set which is configured in advance or agreed with the terminal in advance to carry out space combination so as to indicate the terminal to carry out space combination on response information of all downlink carriers in the downlink carrier set; each downlink carrier in the downlink carrier set which is configured in advance or agreed with the terminal in advance to carry out space combination is a downlink carrier scheduled by the PDCCH signaling; or

The PDCCH signaling sent by the base station carries information of one downlink carrier set in a downlink carrier set which is configured in advance or agreed with the terminal in advance and is not subjected to space combination, so as to indicate the terminal not to perform space combination on response information of all downlink carriers in the downlink carrier set; and each downlink carrier in the downlink carrier set which is configured in advance or agreed with the terminal in advance and is not subjected to space combination is the downlink carrier scheduled by the PDCCH signaling.

6. The method of any of claims 4-5, further comprising:

and the base station informs the terminal whether the configuration information issued by the PDCCH signaling is valid or not through a high-level signaling.

7. The method as claimed in any of claims 4-5, wherein the base station determining, for each downlink carrier, whether the terminal is required to spatially combine the response information of the downlink carrier comprises:

8. The method of claim 6, wherein the higher layer signaling is:

9. A response information feedback method, comprising:

10. The method of claim 9, wherein the higher layer signaling is:

11. A response information feedback method, comprising:

12. The method of claim 11, wherein when the terminal determines whether to spatially combine the response information of the downlink carrier scheduled by the PDCCH signaling according to the configuration information carried in the PDCCH signaling:

the terminal determines to perform spatial combination or not to perform spatial combination on the response information of all downlink carriers scheduled by the PDCCH according to 1-bit configuration information carried in the PDCCH signaling; or,

the terminal determines whether to perform spatial combination on response information of corresponding downlink carriers according to the independent configuration information corresponding to each downlink carrier in the configuration information; or,

the terminal determines a downlink carrier set according to configuration information carried in the PDCCH signaling, wherein the downlink carrier set is one of a plurality of downlink carrier sets which are pre-configured by the base station or pre-agreed with the base station to perform spatial combination, and the terminal determines to perform spatial combination on response information of each downlink carrier in the downlink carrier set; a downlink carrier in a downlink carrier set which is configured in advance by each base station or is agreed with the base station in advance to carry out space combination is a downlink carrier scheduled by the PDCCH signaling; or,

the terminal determines a downlink carrier set according to configuration information carried in the PDCCH signaling, wherein the downlink carrier set is one of a plurality of downlink carrier sets which are pre-configured by the base station or are pre-agreed with the base station and are not subjected to space combination, and the terminal determines that the response information of each downlink carrier in the downlink carrier sets is not subjected to space combination; and the downlink carrier in the downlink carrier set which is configured in advance by each base station or is not subjected to space combination appointed by the base station in advance is the downlink carrier scheduled by the PDCCH signaling.

13. The method according to any of claims 11-12, wherein before the terminal determines whether to spatially combine the response information of the downlink carriers according to the configuration information, the method further comprises:

the terminal determines whether the configuration information issued by the base station through the PDCCH signaling is valid according to the notification issued by the base station through the high-level signaling;

the terminal determines whether to perform spatial combination on the response information of the downlink carrier according to the configuration information, and the method comprises the following steps:

and when determining that the configuration information issued by the base station through the PDCCH signaling is valid, the terminal determines whether to perform spatial combination on the response information of the downlink carrier according to the configuration information.

14. The method of claim 13, wherein the higher layer signaling is:

15. A base station, comprising:

the configuration unit is configured to:

16. The base station of claim 15, wherein the determining unit is configured to:

17. A base station according to any of claims 15 to 16, wherein the higher layer signalling is:

18. A base station, comprising:

the configuration unit is configured to:

19. The base station of claim 18, wherein the configuration unit is configured to:

in the sent PDCCH signaling, each downlink carrier in all downlink carriers scheduled by the PDCCH signaling carries independent configuration information whether a terminal performs spatial combination on response information of the downlink carrier; or,

20. A base station according to any of claims 18-19, characterized in that the base station further comprises:

and the notification unit is used for notifying the terminal whether the configuration information issued by the PDCCH signaling is valid or not through a high-level signaling.

21. The base station according to any of claims 18-19, characterized by said determining unit being adapted to:

22. The base station of claim 20, wherein the higher layer signaling is:

23. A terminal, characterized in that the terminal comprises:

the determination unit is configured to:

24. The terminal of claim 23, wherein the higher layer signaling is:

25. A terminal, characterized in that the terminal comprises:

the determination unit is configured to:

26. The terminal of claim 25, wherein the determining unit is configured to:

when determining whether to perform spatial combination on response information of a downlink carrier scheduled by the PDCCH signaling according to configuration information carried in the PDCCH signaling:

27. A terminal according to any of claims 25-26, characterised in that the terminal further comprises:

a determining unit, configured to determine whether the configuration information issued by the base station through the PDCCH signaling is valid according to a notification issued by the base station through a high-level signaling before the determining unit determines whether to perform spatial merging on the response information of the downlink carrier according to the configuration information;

the determination unit is configured to:

28. The terminal of claim 27, wherein the higher layer signaling is: