CN112910611A - HARQ-ACK transmission method and device for enhanced carrier aggregation system - Google Patents

HARQ-ACK transmission method and device for enhanced carrier aggregation system Download PDF

Info

Publication number
CN112910611A
CN112910611A CN202110065416.1A CN202110065416A CN112910611A CN 112910611 A CN112910611 A CN 112910611A CN 202110065416 A CN202110065416 A CN 202110065416A CN 112910611 A CN112910611 A CN 112910611A
Authority
CN
China
Prior art keywords
harq
ack
transmission mode
feedback information
cell
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110065416.1A
Other languages
Chinese (zh)
Inventor
付景兴
李迎阳
张世昌
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing Samsung Telecom R&D Center
Beijing Samsung Telecommunications Technology Research Co Ltd
Samsung Electronics Co Ltd
Original Assignee
Beijing Samsung Telecommunications Technology Research Co Ltd
Samsung Electronics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201510184434.6A external-priority patent/CN106160983A/en
Application filed by Beijing Samsung Telecommunications Technology Research Co Ltd, Samsung Electronics Co Ltd filed Critical Beijing Samsung Telecommunications Technology Research Co Ltd
Publication of CN112910611A publication Critical patent/CN112910611A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1861—Physical mapping arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network

Abstract

The application discloses a HARQ-ACK transmission method of an enhanced carrier aggregation system, which comprises the following steps: the UE receives a PDCCH/EPDCCH and a PDSCH sent by a base station; the UE determines the bit number of HARQ-ACK feedback information sent by each cell configured by the UE in the current uplink subframe through a PUSCH or PUCCH according to an uplink downlink assignment indication (UL DAI) acquired in an uplink Grant (UL Grant), a PDSCH subframe received in an HARQ-ACK bundling window and the number of PDCCH/EPDCCH subframes for indicating downlink semi-persistent scheduling (SPS) release, or according to the number or transmission mode of all configured cells; and the UE sends the HARQ-ACK feedback information of all the cells on the PUSCH or PUCCH of the current uplink subframe. By applying the method and the device, the correct HARQ-ACK information feedback can be carried out in a plurality of cell transmission modes and CA systems with different configurations.

Description

HARQ-ACK transmission method and device for enhanced carrier aggregation system
The application is a divisional application of an invention patent application with the filing date of 2015, 8 and 13, and the filing number of 201510498447.0, and the invention is named as 'a method and equipment for transmitting HARQ-ACK of an enhanced carrier aggregation system'.
Technical Field
The present invention relates to a wireless communication system, and more particularly, to a method and apparatus for HARQ-ACK transmission for an enhanced carrier aggregation system.
Background
A Long Term Evolution (LTE) system supports two Duplex modes, Frequency Division Duplex (FDD) and Time Division Duplex (TDD). Fig. 1 is a frame structure of a TDD system. Each radio frame is 10ms in length and is equally divided into two half-frames of 5ms in length. Each half frame includes 8 Time slots with a length of 0.5ms and 3 special fields, namely, a Downlink Pilot Time Slot (DwPTS), a Guard Period (GP), and an Uplink Pilot Time Slot (UpPTS), and the sum of the lengths of the 3 special fields is 1 ms. Each subframe consists of two consecutive slots, i.e., the k-th subframe includes slot 2k and slot 2k + 1. The TDD system supports 7 different TDD uplink and downlink configurations, as shown in table 1. In table 1, D represents a downlink subframe, U represents an uplink subframe, and S represents the above-mentioned special subframe including 3 special fields.
Table 1: uplink and downlink configuration of LTE TDD
Figure BDA0002903669330000011
Figure BDA0002903669330000021
For the TDD system, Hybrid Automatic Repeat-Request Acknowledgement (HARQ-ACK) of Physical Downlink Control Channel (PDCCH)/Enhanced Physical Downlink Control Channel (EPDCCH) released by a Physical Downlink Shared Channel (PDSCH) and a Semi-Persistent Scheduling (SPS) transmitted in a plurality of Downlink subframes is transmitted on one uplink subframe, as shown in fig. 2. The number of downlink subframes for transmitting HARQ-ACK on one uplink subframe is called HARQ-ACK bundling window size.
For a TDD system, Downlink control Information (DL DCI) in a PDCCH/EPDCCH scheduling a PDSCH and a PDCCH/EPDCCH released by Downlink semi-persistent scheduling includes a 2-bit Downlink Assignment Indicator (DAI) field, and DL DAI is a counter sent by a base station (eNB) to a User Equipment (UE) and used to indicate the sum of the number of PDCCHs/EPDCCH that the eNB has scheduled the PDSCH and the number of PDCCHs/EPDCCH released by Downlink semi-persistent scheduling (SPS) in a bundling window. The DAI value in the first DL DCI sent by the eNB in the bundling window is 1, the DAI value in the second DL DCI sent by the eNB in the bundling window is 2, and so on. Using the value of the DL DAI field, the UE can determine whether it has missed DL DCI in the same bundling window before, and can determine the HARQ-ACK feedback information transmission method of the same window according to whether DL DCI is missed. In addition, for TDD Uplink downlink configuration 1, 2, 3, 4, 5, or 6, the UL DCI format 0/4 for scheduling PUSCH includes a 2-bit UL DAI field indicating the sum of the number of subframes for transmitting PDSCH within the current bundling window and the number of subframes for PDCCH/EPDCCH released by downlink semi-persistent scheduling, which is used to determine the number of bits for determining HARQ-ACK when HARQ-ACK feedback information is transmitted in a Physical Uplink Shared Channel (PUSCH). For TDD Uplink Downlink configuration 0, an Uplink Downlink control Information (UL DCI) format 0/4 of scheduling PUSCH includes a 2-bit Uplink Index (UL Index) field for indicating whether to schedule PUSCH of 2 Uplink subframes or PUSCH of 1 subframe when one Downlink subframe schedules PUSCH of 2 Uplink subframes, and which subframe is scheduled when PUSCH of 1 subframe is scheduled.
For an FDD system, the number of downlink subframes for transmitting HARQ-ACK on one uplink subframe is 1, so that DLDCI in PDCCH/EPDCCH for scheduling PDSCH and PDCCH/EPDCCH released by downlink semi-persistent scheduling does not include a 2-bit DLDAI domain, and ULDCI format 0/4 for scheduling PUSCH does not include a 2-bit UL DAI field.
In order to increase the transmission rate of users, an enhanced LTE-a (LTE-a) system of the LTE system is proposed. In LTE-a, a larger operating bandwidth, i.e., Carrier Aggregation (CA), is obtained by aggregating a plurality of Component Carriers (CCs), and downlink and uplink of a communication system are configured, thereby supporting a higher transmission rate. For example, to support a bandwidth of 100MHz, it can be obtained by aggregating 5 CCs of 20 MHz. Here, each CC is referred to as a Cell (Cell). For one UE, a base station may be configured to operate in multiple CCs, one of which is a primary CC (PCC or Pcell), and the other CCs are referred to as secondary CCs (SCC or Scell).
To further fully utilize the broad spectrum resources, including the spectrum resources of the unlicensed band, one UE may aggregate a carrier aggregation system with more than 5 CCs, thereby obtaining a larger operating bandwidth, for example, a carrier aggregation system aggregating up to 32 cells.
In the TDD system, HARQ-ACK feedback information corresponding to multiple downlink subframe data of the same cell may be transmitted in an uplink subframe n, DL DAI information needs to be indicated when scheduling the multiple downlink subframe data, and the DL DAI information of different cells is independently indicated, as shown in fig. 3.
One way for the UE to feed back the HARQ-ACK feedback information is Physical Uplink Control Channel (PUCCH) format 3, where PUCCH format 3 can support up to 5 cells. The base station sends an uplink grant (UL grant) on a Physical Downlink Control Channel (PDCCH) to schedule a Physical Uplink Shared Channel (PUSCH) resource for the UE. The value of UL DAI in UL grant is used to determine the number of bits for transmitting HARQ-ACK feedback information using the method of PUCCH format 3.
For transmitting HARQ-ACK in PUCCH if the UE configures PUCCH format 3 for transmitting HARQ-ACK; or in the PUSCH, and the transmission of the PUSCH is scheduled by the PDCCH/EPDCCH without the UL DAI field, or the transmission of the PUSCH is not scheduled by the detected PDCCH/EPDCCH, it is assumed that the UE configures 2 cells, and the bundling window size of the two cells is M. In this case, for a cell with a transmission mode of SIMO (single input multiple output), the number of bits required for HARQ-ACK feedback information is M; for a cell with a transmission mode of MIMO (multiple input multiple output), if the sum of the number of bits of HARQ-ACK feedback information of all cells that the UE needs to transmit is calculated according to the cell bundling window size and is less than or equal to N (e.g., 20), the number of bits required for the HARQ-ACK feedback information of this cell is M × 2; for a cell with a transmission mode of MIMO (multiple input multiple output), if the sum of the number of bits of HARQ-ACK feedback information of all cells that the UE needs to transmit calculated according to the cell bundling window size is greater than N (e.g., 20), the number of bits required for HARQ-ACK feedback information of this cell is M.
If the UE configures PUCCH format 3 to transmit HARQ-ACK, for transmitting HARQ-ACK in PUSCH and the transmission of PUSCH is scheduled by PDCCH/EPDCCH where UL DAI field exists, it is assumed below that the UE configures 2 cells and UL DAI has a value of M. In this case, for a cell with a transmission mode of SIMO (single input multiple output), the number of bits required for HARQ-ACK feedback information is M; for a cell with a transmission mode of MIMO (multiple input multiple output), if the sum of the number of bits of HARQ-ACK feedback information of all cells that the UE needs to transmit is calculated according to UL DAI to be less than or equal to N (e.g., 20), the number of bits required for HARQ-ACK feedback information of this cell is M × 2; for a cell with a transmission mode of MIMO (multiple input multiple output), if the sum of the number of bits of HARQ-ACK feedback information of all cells that the UE needs to transmit is calculated according to the ULDAI to be greater than N (e.g., 20), the number of bits required for HARQ-ACK feedback information of this cell is M.
When the number of cells configured by the UE is large, for example, when a maximum of 32 cells are configured, in order to indicate a scheduling situation of data of multiple cells in the same subframe, a DL DAI of a cell specific is introduced, where the DL DAI does not identify data transmission of multiple downlink subframes scheduled on the same cell, but identifies data transmission of multiple cells scheduled on one subframe, as shown in fig. 4. For example, in all cells that need to feed back HARQ-ACK information in uplink subframe n, DL DAI is equal to how many downlink grant signaling (DL grant) are transmitted in total until the current cell. The UL DCI for scheduling the PUSCH comprises a UL DAI domain, wherein the UL DAI is equal to the sum of the number of PDSCHs which are transmitted by a plurality of cells in a current subframe and the number of PDCCH/EPDCCH released by downlink semi-persistent scheduling. For the FDD system, the total number of bits of HARQ-ACK for all cells that need to feed back HARQ-ACK information in uplink subframe n is referred to as the total number of bits of HARQ-ACK. Because the number of bits of HARQ-ACK of different cells is different when the transmission modes of different cells are different in the same subframe, the number of bits of HARQ-ACK of different cells is also the same when the transmission modes of different cells are the same. In addition, if the HARQ-ACK of all the cells are spatially bundled, the number of bits of the HARQ-ACK of different cells is the same no matter the transmission modes of different cells are different or the same.
Disclosure of Invention
The application discloses a HARQ-ACK transmission method and equipment of an enhanced carrier aggregation system.
A HARQ-ACK transmission method of an enhanced carrier aggregation system comprises the following steps:
the UE receives a PDCCH/EPDCCH and a PDSCH sent by a base station;
the UE determines the bit number of HARQ-ACK feedback information sent by each cell configured by the UE in the current uplink subframe through a PUSCH or PUCCH according to an uplink downlink assignment indication (UL DAI) acquired in an uplink Grant (UL Grant), a PDSCH subframe received in an HARQ-ACK bundling window and the number of PDCCH/EPDCCH subframes for indicating downlink semi-persistent scheduling (SPS) release, or according to the number or transmission mode of all configured cells;
and the UE sends the HARQ-ACK feedback information of all the cells on a PUSCH or PUCCH of the current uplink subframe.
Preferably, when the current uplink subframe is located in the Scell, the determining the bit number of the HARQ-ACK feedback information includes: determining the number of the fed-back HARQ-ACK bits according to the number of the PDSCH subframes and the PDCCH/EPDCCH subframes indicating the release of downlink semi-persistent scheduling (SPS) received in the UL DAI and HARQ-ACK bundling window; the uplink and downlink DCI formats scrambled by the C-RNTI of the UE in the special PDCCH/EPDCCH search space of the Scell of the UE comprise UL DAI and DL DAI;
when the current uplink subframe is located in the Pcell, the determining the bit number of the HARQ-ACK feedback information comprises: determining the number of bits of the HARQ-ACK fed back according to the number of the cells of the UE; and the uplink and downlink DCI formats scrambled by the C-RNTI of the UE in the public and private PDCCH/EPDCCH search space of the Pcell of the UE do not comprise ULDAI and DLDAI.
Preferably, when the current uplink subframe is located in Scell, or when the current uplink subframe is located in Pcell and the current uplink subframe is scheduled by uplink DCI in UE-specific PDCCH/EPDCCH, the determining the bit number of HARQ-ACK feedback information includes: determining the number of feedback HARQ-ACK bits according to the UL DAI, the PDSCH subframe and a PDCCH/EPDCCH subframe indicating the release of downlink semi-persistent scheduling (SPS); the uplink and downlink DCI formats scrambled by the C-RNTI of the UE in the search space of the dedicated PDCCH/EPDCCH of the Scell or Pcell of the UE comprise UL DAI and DL DAI;
when the current uplink subframe is located in Pcell and the current uplink subframe is scheduled by uplink DCI in a common PDCCH, the determining the bit number of the HARQ-ACK feedback information includes: determining the number of bits of the HARQ-ACK fed back according to the number of the cells of the UE; and the uplink and downlink DCI formats scrambled by the C-RNTI of the UE in the public PDCCH search space of the Pcell of the UE do not comprise the ULDAI and the DLDAI.
Preferably, the sending, by the UE, HARQ-ACK feedback information of all cells on a PUSCH of a current uplink subframe includes:
when the DL DAI starts counting from the configured Scell, arranging HARQ-ACK bits of the Pcell at the forefront, and then arranging the HARQ-ACK bits of all Scell from small to large according to the DL DAI;
when the DL DAI counts from the configured Pcell,
if the UE detects a PDCCH for scheduling a PDSCH and a PDCCH for indicating downlink SPS release in a public search space of a Pcell or a UE-specific search space of the PCell and detects that the PDCCH in the UE-specific search space of the PDCCH does not comprise a DL DAI domain, the transmission mode of the Pcell is a SIMO mode or the transmission mode of the Pcell is a MIMO mode but HARQ-ACK is subjected to spatial bundling, arranging HARQ-ACK bits of the Pcell at the top, and then arranging HARQ-ACK of all Scells from small to large according to the DL DAI; if the UE detects a PDCCH for scheduling a PDSCH and a PDCCH for indicating downlink SPS release in a UE specific search space of a PCell and detects that the PDCCH in the UE specific search space of the PDCCH comprises a DL DAI domain, arranging HARQ-ACK bits of all the PCell and the Scell from small to large according to the DL DAI;
if the UE does not detect the PDCCH/EPDCCH for dispatching the PDSCH and the PDCCH/EPDCCH for indicating the release of the downlink SPS in the public and UE-specific search spaces of the Pcell, the UE arranges HARQ-ACK bits of the Pcell and the Scell according to the sequence of the DL DAI from small to large;
if the UE has downlink SPS transmission in the Pcell, and the transmission mode of the Pcell is MIMO and is not subjected to spatial bundling, the HARQ-ACK arrangement of the UE is as follows: { HARQ-ACK bits for SPS PDSCH of Pcell, NACK, HARQ-ACK bits for Scell ordered according to DL DAI }, or { HARQ-ACK bits for Scell ordered according to DL DAI, NACK, HARQ-ACK bits for SPS PDSCH of Pcell }.
Wherein, for the undetected PDSCH and the undetected PDCCH/EPDCCH indicating the downlink SPS release, the corresponding HARQ-ACK bit is set as NACK.
Preferably, if the UE configures PUCCH format 3 or format X for HARQ-ACK transmission and transmits HARQ-ACK on the PUCCH, or if the UE transmits HARQ-ACK on the PUSCH and the transmission of PUSCH is scheduled by PDCCH/EPDCCH without UL DAI field or the transmission of PUSCH is not scheduled by detected PDCCH/EPDCCH, determining the number of bits of the HARQ-ACK feedback information includes: and the UE determines the total number of bits of the HARQ-ACK feedback information of all the cells transmitted in the current uplink subframe according to the configured transmission modes of all the cells.
Preferably, if the UE configures PUCCH format 3 or format X for HARQ-ACK transmission, and transmits HARQ-ACK on PUSCH, and the transmission of PUSCH is scheduled by PDCCH/EPDCCH having UL DAI field, determining the bit number of HARQ-ACK feedback information includes: and the UE is determined according to the value of a UL DAI domain carried in the PDCCH/EPDCCH for scheduling the current uplink subframe, the PDSCH subframe received in the HARQ-ACK bundling window and the number of PDCCH/EPDCCH subframes for indicating the release of downlink semi-persistent scheduling (SPS).
Preferably, the method further comprises: calculating the bit number M required for transmitting the HARQ-ACK feedback information of all the cells according to the transmission modes of all the cells configured by the UE; for the cell in SIMO transmission mode, the number of bits of HARQ-ACK feedback information is 1, and for the cell in MIMO transmission mode, the number of bits of HARQ-ACK feedback information is 2;
if the M is less than or equal to a preset positive integer N, the HARQ-ACK information of all the cells is not subjected to space bundling when the HARQ-ACK information is transmitted; and the value of the UL DAI domain carried in the PDCCH/EPDCCH for scheduling the current uplink subframe is counted according to the transmission block;
if M is larger than a preset positive integer N, carrying out space binding transmission on HARQ-ACK information of a cell with a transmission mode of MIMO when the HARQ-ACK information is transmitted; and the value of the ULDAI domain carried in the PDCCH/EPDCCH for scheduling the current uplink subframe is counted according to the number of cells.
Preferably, the method further comprises: determining whether HARQ-ACK of a service cell with a transmission mode of MIMO carries out space binding transmission or not according to a high-layer signaling or a physical layer signaling;
if the HARQ-ACK of the service cell with the MIMO transmission mode is determined not to be subjected to space binding transmission according to the high-layer signaling or the physical layer signaling, counting the value of an UL DAI domain carried in a PDCCH/EPDCCH of a current uplink subframe according to a transmission block;
and if the HARQ-ACK of the service cell with the MIMO transmission mode is determined to carry out space binding transmission according to the high-layer signaling or the physical layer signaling, counting the value of the UL DAI domain carried in the PDCCH/EPDCCH of the current uplink subframe according to the number of the cells.
Preferably, the physical layer signaling is 1 bit added in downlink DCI used for scheduling PDCCH/EPDCCH of PDSCH or an existing bit in the downlink DCI, and is used to indicate whether HARQ-ACK of UE performs spatial bundling; alternatively, the first and second electrodes may be,
the physical layer signaling is 1 bit added in the uplink DCI used for scheduling PDCCH/EPDCCH of PUSCH or the existing bit in the uplink DCI, and is used for indicating whether HARQ-ACK of UE carries out space binding.
Preferably, the bit number B of the HARQ-ACK feedback information is determined according to the value of the UL DAI domain, the number of PDSCH subframes and the number of PDCCH/EPDCCH subframesDLThe method comprises the following steps:
when the HARQ-ACK does not perform spatial bundling, BDL＝WDAI UL+(2L)*ceiling((2a+b-WDAI UL)/(2L))；
When the HARQ-ACK is spatially bundled, BDL＝WDAI UL+(2L)*ceiling((a+b-WDAI UL)/(2L))；
Wherein, WDAI ULIs the value of UL DAI domain obtained by UE from UL Grant in PDCCH/EPDCCH, ceiling () is an integer function, a represents the sum of the number of PDSCHs of a serving cell with MIMO transmission mode detected by UE and the number of PDCCH/EPDCCH for indicating downlink SPS releaseB represents the sum of the number of serving cell PDSCHs of which the transmission mode is SIMO and the number of PDCCH/EPDCCH indicating downlink SPS release, L is the bit number of UL DAI in UL Grant or the bit number of the sum DAI/reference DAI acquired in DL DCI, and "/" represents OR.
Preferably, the method further comprises: the PDCCH/EPDCCH of the scheduling PDSCH or the PDCCH/EPDCCH indicating the release of the downlink SPS of the partial or all cells of the UE comprises DL DAI;
the value of the DL DAI represents the total number of PDCCH/EPDCCH transmitted to the current cell in a bundling window or the total number of transmission blocks scheduled by the PDCCH/EPDCCH transmitted to the current cell in a side window; or, for a serving cell with a MIMO transmission mode, the value of the DL DAI indicates the total number of PDCCH/EPDCCH transmitted in one bundling window until the current cell, and for a serving cell with an SIMO transmission mode, the value of the DL DAI indicates the total number of transmission blocks scheduled by PDCCH/EPDCCH transmitted in one bundling window until the current cell, wherein the serving cell with the MIMO transmission mode in one bundling window is arranged in front of the serving cell with the SIMO transmission mode, and DL DCI in the serving cell with the MIMO transmission mode carries an indication whether HARQ-ACK is spatially bundled.
Preferably, if the UE configures PUCCH format 3 or format X for HARQ-ACK transmission and transmits HARQ-ACK on PUSCH, the UE determines the total number of bits of HARQ-ACK feedback information of all cells transmitted in the current uplink subframe according to the configured transmission modes of all cells;
the method further comprises the following steps: determining a time-frequency resource weighting coefficient when HARQ-ACK is transmitted according to UL DAI included in PDCCH/EPDCCH scheduling the current uplink subframe;
and when the HARQ-ACK of all the cells is transmitted, determining the time-frequency resource amount occupied when the HARQ-ACK is fed back according to the time-frequency resource weighting coefficient.
Preferably, the determining the total number of bits of the HARQ-ACK feedback information of all cells transmitted in the current uplink subframe includes:
the UE calculates the bit number M required by the HARQ-ACK transmission of all the cells according to the transmission modes of all the cells; for the cell in SIMO transmission mode, the number of bits of HARQ-ACK feedback information is 1, and for the cell in MIMO transmission mode, the number of bits of HARQ-ACK feedback information is 2;
if the M is less than or equal to a preset positive integer N, determining that the total number of bits of all cell HARQ-ACK feedback information transmitted in the current uplink subframe is M; when the HARQ-ACK information is transmitted, the HARQ-ACK information of all the cells is not subjected to space binding;
if the M is larger than a preset positive integer N, determining that the total number of bits of all cell HARQ-ACK feedback information transmitted in the current uplink subframe is M'; when the HARQ-ACK information is transmitted, carrying out space binding transmission on the HARQ-ACK information of the cell with the MIMO transmission mode; when M' is calculated, the number of bits of HARQ-ACK feedback information of the cells in SIMO and MIMO transmission modes is 1.
Preferably, the determining the total number of bits of the HARQ-ACK feedback information of all cells transmitted in the current uplink subframe includes:
determining whether HARQ-ACK of a service cell with a transmission mode of MIMO carries out space binding transmission or not according to a high-layer signaling or a physical layer signaling;
determining the bit number of HARQ-ACK feedback information of each cell according to the configured transmission mode of each cell; when HARQ-ACK of a serving cell in an MIMO transmission mode adopts space binding transmission, the number of bits of HARQ-ACK feedback information of the serving cells in the SIMO transmission mode and the MIMO transmission mode is 1; when the HARQ-ACK of the serving cell in the MIMO transmission mode does not adopt space binding transmission, the number of bits of HARQ-ACK feedback information of the serving cell in the MIMO transmission mode is 2, and the number of bits of HARQ-ACK feedback information of the serving cell in the SIMO transmission mode is 1;
and summing the configured bit numbers of the HARQ-ACK feedback information of all the service cells, and taking the summation result as the total number of the bits of the HARQ-ACK feedback information of all the cells transmitted in the current uplink subframe.
An HARQ-ACK transmission apparatus of an enhanced carrier aggregation system, comprising: the device comprises a receiving unit, a bit total number determining unit and a transmitting unit;
the receiving unit is used for receiving the PDCCH/EPDCCH and the PDSCH sent by the base station;
the bit total number determining unit determines the total number of bits of HARQ-ACK feedback information sent by all cells configured by the UE through a PUSCH or PUCCH in a current uplink subframe according to an uplink downlink assignment indication (UL DAI) acquired in an uplink Grant (UL Grant), a PDSCH subframe received in an HARQ-ACK bundling window and the number of PDCCH/EPDCCH subframes indicating downlink semi-persistent scheduling (SPS) release, or according to the number or transmission mode of all cells configured by the UE;
and the transmission unit is used for transmitting the HARQ-ACK feedback information of all the cells on the PUSCH or PUCCH of the current uplink subframe.
According to the technical scheme, the UE receives the PDCCH/EPDCCH and the PDSCH sent by the base station; the UE determines the bit number of HARQ-ACK feedback information sent by each cell configured by the UE in the current uplink subframe through a PUSCH or PUCCH according to an uplink downlink assignment indication (UL DAI) acquired in an uplink Grant (UL Grant), a PDSCH subframe received in an HARQ-ACK bundling window and the number of PDCCH/EPDCCH subframes for indicating downlink semi-persistent scheduling (SPS) release, or according to the number or transmission mode of all configured cells; and the UE sends the HARQ-ACK feedback information of all the cells on the PUSCH or PUCCH of the current uplink subframe. Through the processing, the HARQ-ACK feedback information bits of all cells transmitted on the same subframe can be correctly determined in a plurality of cell transmission modes and CA systems with different configurations, and the correct HARQ-ACK information feedback is carried out.
Drawings
Fig. 1 is an LTE FDD frame structure;
fig. 2 is an LTE TDD frame structure;
FIG. 3 is a diagram illustrating DL DAI information in a TDD system;
FIG. 4 is a diagram of small area DL DAI information;
fig. 5 is a flowchart of a HARQ-ACK transmission method in the present application;
FIG. 6 is a diagram illustrating a bundling window in a TDD system;
FIG. 7 is a diagram illustrating a bundling window in a TDD system;
fig. 8 is a diagram illustrating a third DL DAI counting method according to the second embodiment.
Detailed Description
For the purpose of making the objects, technical means and advantages of the present application more apparent, the present application will be described in further detail with reference to the accompanying drawings.
Fig. 5 is a flowchart of a HARQ-ACK transmission method for an enhanced carrier aggregation system provided in the present invention, which specifically includes the following steps:
step 501: the UE receives a PDCCH/EPDCCH and a PDSCH sent by a base station;
step 502: the UE determines the bit number of HARQ-ACK feedback information sent by each cell configured by the UE in the current uplink subframe through a PUSCH or PUCCH according to an uplink downlink assignment indication (UL DAI) acquired in an uplink Grant (UL Grant), a PDSCH subframe received in an HARQ-ACK bundling window and the number of PDCCH/EPDCCH subframes for indicating downlink semi-persistent scheduling (SPS) release, or according to the number or transmission mode of all configured cells;
specifically, when the bit number of the HARQ-ACK feedback information in the PUSCH is determined, the determination may be performed according to the number of PDSCH subframes received in the UL DAI and HARQ-ACK bundling window and PDCCH/EPDCCH subframes indicating downlink SPS release, or may also be performed according to the number of all configured cells or a transmission mode. And when the bit number of the HARQ-ACK feedback information in the PUCCH is determined, the HARQ-ACK feedback information is determined according to the number or transmission mode of all configured cells.
Step 503: and the UE sends the HARQ-ACK feedback information of each cell on the PUSCH or PUCCH of the current uplink subframe.
The technical solution of the present application is further described in detail by means of several preferred embodiments.
Example one
When a UE configures a plurality of FDD cells, the design of DL DAI and UL DAI will be described first. Here, UL DAI is not present when PUCCH is scheduled, and UL DAI may or may not be present when PUSCH is scheduled.
In order to indicate the scheduling situation of data of multiple cells in the same downlink subframe, the DL DAI of a small region is introduced into the PDCCH/EPDCCH of a scheduling PDSCH of a part or all of the cells and the DL DCI of the PDCCH/EPDCCH indicating release of downlink SPS, so as to indicate how many PDCCHs/EPDCCH are transmitted or how many Transport Blocks (TBs) are scheduled in total until the current cell. And introducing UL DAI in UL DCI of scheduling PUSCH of partial or all cells, or calculating the number of HARQ-ACK bits transmitted in the PUSCH according to the number of the current UE cells.
In the current FDD system (3GPP Rel-12), all downlink DCI formats do not include a DL DAI bit field, and all uplink DCI formats do not include a UL DAI bit field, so the uplink and downlink DCI formats in the existing FDD system need to be optimized.
According to an implementation method of the present application, the uplink and downlink DCI format in the existing FDD system can be optimized in the following manner: in a Pcell configured by UE, an uplink DCI format and a downlink DCI format scrambled by a C-RNTI of the UE in a public and special PDCCH/EPDCCH search space are kept unchanged; in the Scell configured by the UE, an uplink DCI format and a downlink DCI format scrambled by a C-RNTI of the UE in a PDCCH/EPDCCH search space specific to the UE are respectively introduced into an UL DAI domain and a DL DAI domain, where the UL/DL DAI domain includes N bits, for example, N is 2 or 3. In this case, if the uplink subframe for feeding back the HARQ-ACK is located in the PCell, the number of bits for feeding back the HARQ-ACK is determined according to the number of cells of the UE, and if the uplink subframe is located in the SCell, the number of bits for feeding back the HARQ-ACK is determined according to the UL DAI. When determining the number of the fed-back HARQ-ACK bits according to the UL DAI, the number of PDSCH subframes received in the HARQ-ACK bundling window and PDCCH/EPDCCH subframes indicating downlink SPS release need to be further considered, which is the same as below and is not described again.
According to another implementation method of the application, in a Pcell configured by UE, an uplink DCI format and a downlink DCI format scrambled by a C-RNTI of the UE in a public PDCCH search space are kept unchanged; in the Pcell configured by the UE, the uplink and downlink DCI formats scrambled by the C-RNTI of the UE in the UE-specific PDCCH/EPDCCH search space, and in the Scell configured by the UE, the uplink and downlink DCI formats scrambled by the C-RNTI of the UE in the UE-specific PDCCH/EPDCCH search space are respectively introduced into an UL DAI domain and a DL DAI domain, where the UL/DL DAI domain includes N bits, for example, N is 2 or 3. In this case, if the uplink subframe for feeding back the HARQ-ACK is located in the PCell and is scheduled by the uplink DCI in the UE-specific PDCCH/EPDCCH or is located in the SCell, the number of HARQ-ACK bits to be fed back is determined according to the UL DAI; otherwise, determining the number of the HARQ-ACK bits fed back according to the number of the cells of the UE.
Several methods of HARQ-ACK transmission for Pcell and Scell are described below.
The method comprises the following steps:
a method for arranging HARQ-ACK bits includes counting DL DAI from Scell configured by UE, arranging HARQ-ACK bits of Pcell at the first position if transmission mode of Pcell is SIMO mode or transmission mode of Pcell is MIMO mode but HARQ-ACK is spatially bundled, arranging HARQ-ACK bits of Pcell at the first and second positions if transmission mode of Pcell is MIMO mode and HARQ-ACK is not spatially bundled, and then arranging HARQ-ACK bits of Scell from small to large according to DL DAI. The HARQ-ACK information of the undetected PDSCH and the undetected PDCCH/EPDCCH indicating the downlink SPS release is set to NACK.
For example, if the UE does not detect PDCCH/EPDCCH scheduling PDSCH and PDCCH/EPDCCH indicating downlink SPS release in the Pcell, and the Pcell does not have downlink SPS transmission in the subframe, and the transmission mode of the Pcell is SIMO, or the transmission mode of the Pcell is MIMO and is spatially bundled, HARQ-ACK of the UE is arranged as follows: { NACK, HARQ-ACK bits of Scell ordered according to DL DAI }. The UE does not detect PDCCH/EPDCCH for scheduling PDSCH and PDCCH/EPDCCH for indicating downlink SPS release in the Pcell, the Pcell does not have downlink SPS transmission in the subframe, and the transmission mode of the Pcell is MIMO and does not undergo spatial bundling, the HARQ-ACK of the UE is arranged as follows: { NACK, NACK, HARQ-ACK bits of Scell ordered according to DL DAI }. The UE detects PDCCH/EPDCCH of a scheduled PDSCH in the Pcell, and the transmission mode of the Pcell is MIMO and is not subjected to spatial bundling, the HARQ-ACK permutation of the UE is as follows: { HARQ-ACK bits of PDSCH codeword (codeword)0 of Pcell, HARQ-ACK bits of PDSCH codeword (codeword)1 of Pcell, HARQ-ACK bits of Scell ordered according to DL DAI }. The UE has PDSCH transmission of downlink SPS in the Pcell, and the transmission mode of the Pcell is MIMO and is not subjected to spatial bundling, the HARQ-ACK arrangement of the UE is as follows: { HARQ-ACK bits for SPS PDSCH of Pcell, NACK, HARQ-ACK bits for Scell ordered according to DL DAI }, or { HARQ-ACK bits for Scell ordered according to DL DAI, NACK, HARQ-ACK bits for SPS PDSCH of Pcell }.
The second method comprises the following steps:
a method for arranging HARQ-ACK bits comprises the following steps:
if the DL DAI is counted from the Pcell configured by the UE, if the UE detects the PDCCH for scheduling the PDSCH and the PDCCH for indicating the downlink SPS release in the common search space of the Pcell or in the UE-specific search space of the Pcell (the PDCCH/EPDCCH for scheduling the PDSCH and the PDCCH/EPDCCH for indicating the downlink SPS release in the UE-specific search space of the Pcell do not include the DL DAI field), and the transmission mode of the Pcell is the SIMO mode or the transmission mode of the Pcell is the MIMO mode but the HARQ-ACK is spatially bundled, the HARQ-ACK bit of the Pcell is arranged at the first position in front, and then the HARQ-ACK bit of the Scell is arranged from small to large according to the DL DAI. If the UE detects the PDCCH/EPDCCH for scheduling the PDSCH and the PDCCH/EPDCCH for indicating the downlink SPS release in a UE specific search space (the PDCCH/EPDCCH for scheduling the PDSCH and the PDCCH/EPDCCH for indicating the downlink SPS release in the UE specific search space of the Pcell comprise DL DAI domains), the HARQ-ACK bits of the Pcell and the Scell are arranged from small to large according to DL DAI;
if the UE does not detect the PDCCH/EPDCCH of the dispatching PDSCH and the PDCCH/EPDCCH indicating the release of the downlink SPS in the public search space of the Pcell and the UE special search space, the HARQ-ACK bits of the Pcell and the Scell are arranged from small to large according to the DL DAI; setting HARQ-ACK information of undetected PDSCH and undetected PDCCH/EPDCCH indicating downlink SPS release as NACK;
if the UE has downlink SPS transmission in the Pcell, and the transmission mode of the Pcell is MIMO and is not subjected to spatial bundling, the HARQ-ACK arrangement of the UE is as follows: { HARQ-ACK bits for SPS PDSCH of Pcell, NACK, HARQ-ACK bits for Scell ordered according to DL DAI }, or { HARQ-ACK bits for Scell ordered according to DL DAI, NACK, HARQ-ACK bits for SPS PDSCH of Pcell }.
Example two
The processing method in the present embodiment relates to the case where HARQ-ACK is transmitted on PUCCH or PUSCH. For the case of HARQ-ACK transmission in PUCCH, ULDAI is not included; for the case of transmitting HARQ-ACK in PUSCH, UL DAI may or may not be included.
When the UE is configured with a plurality of FDD cells, and the transmission mode of the UE configured in the cell is SIMO, one downlink subframe corresponds to one transmission block, and the transmitted HARQ-ACK is 1 bit; when the transmission mode configured by the UE in the cell is MIMO, one downlink subframe corresponds to two transmission blocks, and the transmitted HARQ-ACK is 2 bits. The bundling window herein refers to Cell Specific, wherein the bundling window size is: the number of downlink subframes of all cells transmitting HARQ-ACK feedback information in the same PUCCH is indicated, that is, the number of downlink subframes for transmitting HARQ-ACK in one uplink subframe is 4, and a bundling window is 4, as shown in fig. 6. Or the bundling window size is the number of transport blocks in downlink subframes of all cells that transmit HARQ-ACK feedback information in the same PUCCH, that is, the downlink subframe in which HARQ-ACK is transmitted in one uplink subframe is 4, where 2 cells are in SIMO transmission mode, 2 cells are in MIMO transmission mode, the number of HARQ-ACK bits transmitted in one uplink subframe is 1+1+2+2 — 6, and the bundling window size is 6, as shown in fig. 7.
The transmission mode of different cell configurations transmitting HARQ-ACK information in the same uplink subframe may be different, so the following situation may occur: some cells are configured with a SIMO transmission mode, HARQ-ACK information of one downlink subframe of a corresponding cell is 1 bit, some cells are configured with a MIMO transmission mode, and HARQ-ACK information of one downlink subframe of a corresponding cell is 2 bits, so that consideration needs to be given to how to count PDCCH/EPDCCH scheduling PDSCH within a bundling window and DL DAI indicating PDCCH/EPDCCH released by downlink SPS.
A counting method of DL DAI comprises the following steps: the method is used for indicating how many PDCCH/EPDCCH are transmitted in a bundling window to the current cell, wherein each PDCCH/EPDCCH schedules a PDSCH or a PDCCH/EPDCCH indicating the release of the downlink SPS, and the UL DAI indicates the sum of the number of PDSCHs scheduled by the eNB in the current subframe and the number of PDCCH/EPDCCH indicating the release of the downlink SPS. This DL DAI counting method is applicable to the case where all cells are configured in SIMO transmission mode, or in MIMO transmission mode with HARQ-ACK spatially bundled. The DAI value in the first DL DCI sent by the eNB in the bundling window is 1, the DAI value in the second DL DCI sent by the eNB in the bundling window is 2, and so on. Using the value of the DL DAI field, the UE can determine whether it has missed DL DCI in the same bundling window before, and can determine the HARQ-ACK feedback information transmission method of the same window according to whether DL DCI is missed.
Another method for counting DL DAIs is: the method is used for indicating how many transmission blocks are scheduled by the sent PDCCH/EPDCCH to the current cell in one bundling window, wherein the transmission mode schedules one transmission block for each PDCCH/EPDCCH of the SIMO cell, and the transmission mode schedules two transmission blocks for each PDCCH/EPDCCH of the MIMO cell. In addition, the UL DAI indicates the sum of the number of transport blocks scheduled by the eNB in the current subframe. The value of DAI in the first DL DCI transmitted by the eNB in the bundling window is 1 if the cell of the first DL DCI is configured in the SIMO transmission mode, and the value of DAI in the first DL DCI transmitted by the eNB in the bundling window is 2 if the cell of the first DL DCI is configured in the MIMO transmission mode. If the cell of the first DL DCI is configured as SIMO and the cell of the second DL DCI is configured as SIMO, the DAI value of the second DL DCI transmitted by the eNB in the bundling window is 2; if the cell of the first DL DCI is configured as SIMO and the cell of the second DL DCI is configured as MIMO, the DAI value of the second DL DCI transmitted by the eNB in the bundling window is 3; if the cell of the first DL DCI is configured as MIMO and the cell of the second DL DCI is configured as SIMO, the DAI value of the second DL DCI transmitted by the eNB in the bundling window is 3; if the cell of the first DL DCI is configured as MIMO, the cell of the second DL DCI is configured as MIMO, the DAI value of the second DL DCI transmitted by the eNB in the bundling window is 4, and so on. Using the value of the DL DAI field, the UE can determine whether it has missed DL DCI in the same bundling window before, and can determine the HARQ-ACK feedback information transmission method of the same window according to whether DL DCI is missed.
Another method for counting DL DAIs is: firstly arranging a serving cell with a transmission mode of MIMO configured by UE in a bundling window in front, and then arranging a serving cell with a transmission mode of SIMO configured by the UE, wherein the arrangement can be that when a base station configures a serving cell index, the serving cell with the transmission mode of MIMO is firstly arranged according to the sequence of the serving cell indexes from small to large, and then the serving cell with the transmission mode of SIMO is arranged, and the serving cell index at this time is also called a DL DAI sequencing index of the serving cell; or the indexes of the serving cells are not in the order, so that when determining the DL DAI for each scheduling cell, the base station performs the ordering of one serving cell, that is, the serving cell with the MIMO transmission mode configured by the UE is arranged in front of the serving cell, and then the serving cell with the SIMO transmission mode configured by the UE is arranged, which is called the DL DAI ordering index of the serving cell. The serving cell DL DAI ranking index above does not include the primary cell (Pcell). For the serving cell with MIMO transmission mode and the serving cell with SIMO transmission mode, the bit number and the specific value of DL DAI are different, and detailed descriptions are separately provided below.
For DL DAI in DL DCI of PDSCH of a serving cell with a scheduling transmission mode of MIMO, the occupied bit number is P-1(P is a positive integer, e.g., P is 3) bits, the value of DL DAI is used to indicate how many PDCCH/EPDCCH are transmitted in one bundling window to the current cell, 1-bit physical layer signaling in DL DCI is used to indicate whether HARQ-ACK of UE needs spatial bundling, and the specific indication method for physical layer signaling indication may be, for example, that the physical layer signaling indication value is "0", which indicates that HARQ-ACK of UE does not perform spatial bundling; the physical layer signaling indication value is '1', which indicates that the HARQ-ACK of the UE is spatially bundled, and the physical layer signaling indications in the PDCCH/EPDCCH scheduling the PDSCH of the serving cell with all transmission modes MIMO for the UE are the same.
For the DL DAI in the DL DCI of the PDSCH of the serving cell with the scheduling transmission mode of SIMO, the occupied bit number is P bits, and the value of the DL DAI is used to indicate how many transmission blocks are scheduled together by the PDCCH/EPDCCH sent in one bundling window to the current cell, where the transmission mode is that each PDCCH/EPDCCH of the SIMO cell schedules one transmission block, and the transmission mode is considered as that each PDCCH/EPDCCH of the MIMO cell schedules two transmission blocks, this counting method of DL DAI is applicable to the cell with the SIMO transmission mode configured and the cell with the MIMO transmission mode configured for the UE, and the HARQ-ACK of the serving cell configured with the MIMO transmission mode may be spatially bundled or not spatially bundled. The UL DAI indicates the sum of the number of transport blocks scheduled by the eNB in the current subframe.
For example, when P is 3, the UE schedules 2 serving cells with MIMO transmission mode and then schedules 3 serving cells with SIMO transmission mode. Scheduling the middle DL DAI of DL DCI in the serving cell with the first transmission mode of MIMO to be 2 bits, wherein the value of the middle DL DAI is 1, and the 1-bit physical layer signaling indication value in the DL DCI is 0, which indicates that HARQ-ACK of the UE is not subjected to spatial bundling; scheduling the middle DL DAI of DL DCI in the serving cell with the second transmission mode being MIMO to be 2 bits, where the value is 2, and the 1-bit physical layer signaling indication value in the DL DCI is "0", indicating that HARQ-ACK of the UE is not spatially bundled; then the middle DL DAI of the DL DCI scheduling the serving cell with the first transmission mode of SIMO is 3 bits, and its value is 5; the DL DAI in the DL DCI scheduling the serving cell with the second transmission mode of SIMO is 3 bits, which has a value of 6; the middle DAI of the DL DCI scheduling the serving cell with the third transmission mode of SIMO is 3 bits, and its value is 7, as shown in fig. 8.
In the above manner, using the value of the DL DAI field, the UE can determine whether it has missed the DL DCI in the same bundling window before, and can determine the HARQ-ACK feedback information transmission method of the same window according to whether there is a DL DCI missing.
The value of UL DAI in UL grant is used to determine the number of bits for transmitting HARQ-ACK feedback information in PUSCH using the method of PUCCH format 3, or the value of UL DAI in UL grant is used to determine the number of bits for transmitting HARQ-ACK feedback information in PUSCH using the method of PUCCH format X.
If the UE configures PUCCH format 3 to transmit HARQ-ACK or the UE configures PUCCH format X to transmit HARQ-ACK, and transmitting the HARQ-ACK in the PUCCH; or, transmitting HARQ-ACK in PUSCH, and the transmission of PUSCH is scheduled by PDCCH/EPDCCH without UL DAI domain or the transmission of PUSCH is not scheduled by detected PDCCH/EPDCCH, in the two cases, for the cell with transmission mode of SIMO (single input multiple output), the bit number required by HARQ-ACK feedback information is 1; for a cell with a transmission mode of MIMO (multiple input multiple output), the number of bits required for HARQ-ACK feedback information is 2. And calculating the bit number M required by the HARQ-ACK feedback information of all the cells configured by the UE in an uplink subframe according to the transmission modes of all the cells configured by the UE.
If the sum M of the bits of the HARQ-ACK feedback information of all the cells which need to be transmitted by the UE is calculated to be less than or equal to N (for example, for PUCCH format 3, N is 20) according to the transmission mode of the configured cell, the HARQ-ACK information of all the cells does not need to be spatially bundled, and based on the result, for the cell with the transmission mode of SIMO, the bit number of the HARQ-ACK feedback information is 1 when the HARQ-ACK transmission is really carried out; for the cell with the MIMO transmission mode, when the HARQ-ACK transmission is really carried out, the bit number of the HARQ-ACK feedback information is 2. And DL DAIs in PDCCH/EPDCCH scheduling PDSCH at this time are counted by transport block. That is to say, the total number of bits of the HARQ-ACK feedback information of all cells transmitted on the PUSCH of the current uplink subframe, which is finally determined, is M.
If the sum M of the HARQ-ACK feedback information bit numbers of all the cells which need to be transmitted by the UE is calculated according to the transmission mode of the configured cell and is greater than N (for example, for PUCCH format 3, N is 20), the HARQ-ACK information of the cell with the MIMO configured transmission mode needs to be spatially bundled, so that for the cell with the SIMO transmission mode, the HARQ-ACK feedback information bit number is 1 when the HARQ-ACK transmission is really carried out; and for the cell with the MIMO transmission mode, when the HARQ-ACK transmission is really carried out, the bit number of the HARQ-ACK feedback information is 1. And DL DAIs in PDCCH/EPDCCH scheduling PDSCH at this time are counted by the number of cells. That is, the finally determined total number of bits of the HARQ-ACK feedback information of all cells transmitted on the PUSCH of the current uplink subframe is modified to M', that is, the total number of cells.
In the following, it is assumed that the UE configures 6 cells, which are all FDD cells, wherein 2 cells configure an SIMO transmission mode, 4 cells configure an MIMO transmission mode, the HARQ-ACK transmission format configured by the UE is PUCCH format 3, and HARQ-ACK information bits of the 6 cells are 2+4 × 2 ═ 10 < 20, so that HARQ-ACK of the cell configured with the transmission mode being MIMO does not need to be spatially bundled, the number of HARQ-ACK feedback information bits of the cell configured with the transmission mode being SIMO is 1, and the number of HARQ-ACK feedback information bits of the cell configured with the transmission mode being MIMO is 2. In the following, it is assumed that a UE configures 16 cells, which are all FDD cells, wherein 10 cells configure a SIMO transmission mode, 6 cells configure a MIMO transmission mode, a HARQ-ACK transmission format configured by the UE is PUCCH format 3, HARQ-ACK information bits of 16 cells are 10+6 × 2 ═ 22 > 20, so spatial bundling is required for HARQ-ACK configured for the cell with the MIMO transmission mode, the number of HARQ-ACK feedback information bits of the cell with the SIMO transmission mode is 1, and the number of HARQ-ACK feedback information bits of the cell with the MIMO transmission mode is 1.
If the UE configures PUCCH format 3 transmission HARQ-ACK or the UE configures PUCCH format X transmission HARQ-ACK, and HARQ-ACK is transmitted in PUSCH, and the transmission of PUSCH is scheduled by PDCCH/EPDCCH with UL DAI domain, in this case, for the cell with transmission mode SIMO (single input multiple output), the bit number required by HARQ-ACK feedback information is 1; for a cell with a transmission mode of MIMO (multiple input multiple output), the number of bits required for HARQ-ACK feedback information is 2. Calculating the bit number M required by HARQ-ACK feedback information of all cells configured by the UE in an uplink subframe according to the transmission modes of all the cells configured by the UE, and if the sum M of the bit numbers of the HARQ-ACK feedback information of all the cells required to be transmitted by the UE is calculated according to the transmission modes of the configured cells and is less than or equal to N (for example, for PUCCH format 3, N is 20), the HARQ-ACK information of all the cells does not need to be spatially bundled, so that for the cell with the transmission mode of SIMO, when the HARQ-ACK transmission is really carried out, the HARQ-ACK feedback information bit number is 1; for the cell with the MIMO transmission mode, when the HARQ-ACK transmission is really carried out, the bit number of the HARQ-ACK feedback information is 2. The UL DAI at this time is counted according to the transport blocks, and the number of HARQ-ACK information bits that the UE needs to transmit is the UL DAI.
In the following, it is assumed that the UE configures 6 cells, which are all FDD cells, wherein 2 cells configure an SIMO transmission mode, 4 cells configure an MIMO transmission mode, the HARQ-ACK transmission format configured by the UE is PUCCH format 3, and HARQ-ACK information bits of the 6 cells are 2+4 × 2 ═ 10 < 20, so that HARQ-ACK of the cell configured with the transmission mode being MIMO does not need to be spatially bundled, the number of HARQ-ACK feedback information bits of the cell configured with the transmission mode being SIMO is 1, and the number of HARQ-ACK feedback information bits of the cell configured with the transmission mode being MIMO is 2. At this time, if UL DAI is equal to 6, the HARo-ACK bit transmitted in PUSCH is 6.
Calculating the bit number M required by HARQ-ACK feedback information of all cells configured by the UE in an uplink subframe according to the transmission modes of all the cells configured by the UE, and if the sum M of the bit numbers of the HARQ-ACK feedback information of all the cells required to be transmitted by the UE is calculated according to the transmission mode of the configured cells and is greater than N (for example, for PUCCH format 3, N is 20), the bit number of the HARQ-ACK feedback information of the cell with the MIMO configured transmission mode needs to be spatially bundled, so that for the cell with the SIMO configured transmission mode, when the HARQ-ACK transmission is really carried out, the bit number of the HARQ-ACK feedback information is 1; and for the cell with the MIMO transmission mode, when the HARQ-ACK transmission is really carried out, the bit number of the HARQ-ACK feedback information is 1. The method for determining the HARQ-ACK bit information transmitted by the UE according to the value of the UL DAI is explained as follows. The UL DAI at this time is counted according to the number of cells, and the number of bits of HARQ-ACK information which needs to be transmitted by the UE is the UL DAI.
In the following, it is assumed that a UE configures 16 cells, which are all FDD cells, wherein 10 cells configure a SIMO transmission mode, 6 cells configure a MIMO transmission mode, a HARQ-ACK transmission format configured by the UE is PUCCH format 3, HARQ-ACK information bits of 16 cells are 10+6 × 2 ═ 22 > 20, so spatial bundling is required for HARQ-ACK configured for the cell with the MIMO transmission mode, the number of HARQ-ACK feedback information bits of the cell with the SIMO transmission mode is 1, and the number of HARQ-ACK feedback information bits of the cell with the MIMO transmission mode is 1. At this time, if the UL DAI is equal to 13, the HARQ-ACK bit transmitted in the PUSCH is 13.
From the above method, it can be seen that, for transmitting HARQ-ACK in PUSCH, whether spatial bundling is required for HARQ-ACK of UE is determined by whether the total number of HARQ-ACK bits calculated according to the cell configured by the UE and the transmission mode configured by the cell is greater than N, regardless of how much UL DAI is. Meanwhile, for transmitting HARQ-ACK in PUUCH, whether the HARQ-ACK of the UE needs space binding or not can be determined by whether the total number of HARQ-ACK bits calculated according to the cell configured by the UE and the transmission mode configured by the cell is larger than N or not.
Another method for determining whether the HARQ-ACK of the UE needs spatial bundling is to indicate whether the HARQ-ACK of the serving cell with the transmission mode of MIMO is spatially bundled or not according to the high-layer signaling configuration or the physical layer signaling, wherein the method comprises the conditions that the UE transmits the HARQ-ACK in PUCCH and the UE transmits the HARQ-ACK in PUSCH. The physical layer signaling indication may be that 1 bit is added to downlink DCI used for scheduling PDCCH/EPDCCH of PDSCH or bits in the existing domain are reinterpreted to indicate whether HARQ-ACK of UE needs spatial bundling, or the physical layer signaling indication may be that 1 bit is added to uplink DCI used for scheduling PDCCH/EPDCCH of PUSCH or bits in the existing domain are reinterpreted to indicate whether HARQ-ACK of UE needs spatial bundling, where a specific indication method of the physical layer signaling indication may be that a physical layer signaling indication value is "0", which indicates that HARQ-ACK of UE does not need spatial bundling; the physical layer signaling indication value is "1", which indicates that HARQ-ACK of the UE is spatially bundled, and the physical layer signaling indications in PDCCH/EPDCCH scheduling all PDSCHs for the UE are the same. The following is a detailed description.
And if the higher layer signaling configuration or the physical layer signaling indicates that the transmission mode is the HARQ-ACK spatial bundling of the MIMO serving cell. For the cell with the transmission mode of SIMO, when the HARQ-ACK transmission is really carried out, the bit number of the HARQ-ACK feedback information is 1; and for the cell with the MIMO transmission mode, when the HARQ-ACK transmission is really carried out, the bit number of the HARQ-ACK feedback information is 1. And DL DAIs in PDCCH/EPDCCH scheduling PDSCH at this time are counted by the number of cells. For the condition that no UL DAI exists (namely the UE configures PUCCH format 3 or format X to transmit HARQ-ACK and transmits the HARQ-ACK on PUCCH, or if the UE transmits the HARQ-ACK on PUSCH and the transmission of PUSCH is scheduled by PDCCH/EPDCCH without UL DAI domain or the transmission of PUSCH does not pass the detected PDCCH/EPDCCH scheduling), directly determining the total number of bits for transmitting the HARQ-ACK according to the transmission mode of each cell; if the UL DAI exists (i.e. the UE configures PUCCH format 3 or format X to transmit HARQ-ACK, and the PUSCH for transmitting HARQ-ACK is scheduled by PDCCH/EPDCCH which exists in the UL DAI field), then the method for determining the number of HARQ-ACK bits transmitted by the UE according to the value of UL DAI is described: the UL DAI at this time is counted according to the number of cells, and the number of bits of HARQ-ACK information that the UE needs to transmit is the UL DAI, which is specifically the same as the manner of determining the number of bits of HARQ-ACK according to the UL DAI described above.
It is assumed that the UE configures 16 cells, which are all FDD cells, wherein 10 cells configure a SIMO transmission mode, 6 cells configure a MIMO transmission mode, the HARQ-ACK transmission format configured by the UE is PUCCH format 3, the number of HARQ-ACK feedback information bits of the cell with the transmission mode of SIMO is 1, HARQ-ACK of the cell with the transmission mode of MIMO needs to be spatially bundled, and the number of HARQ-ACK feedback information bits of the cell with the transmission mode of MIMO is 1. At this time, if the UL DAI is equal to 13, the HARQ-ACK bit transmitted in the PUSCH is 13.
And if the high-layer signaling configuration or the physical layer signaling indicates that the transmission mode is the HARQ-ACK of the MIMO serving cell, not performing spatial bundling. For the cell with the transmission mode of SIMO, when the HARQ-ACK transmission is really carried out, the bit number of the HARQ-ACK feedback information is 1; and for the cell with the MIMO transmission mode, when the HARQ-ACK transmission is really carried out, the bit number of the HARQ-ACK feedback information is 2. And DL DAIs in PDCCH/EPDCCH scheduling PDSCH at this time are counted by transport block. For the condition that no UL DAI exists (namely the UE configures PUCCH format 3 or format X to transmit HARQ-ACK and transmits the HARQ-ACK on PUCCH, or if the UE transmits the HARQ-ACK on PUSCH and the transmission of PUSCH is scheduled by PDCCH/EPDCCH without UL DAI domain or the transmission of PUSCH does not pass the detected PDCCH/EPDCCH scheduling), directly determining the total number of bits for transmitting the HARQ-ACK according to the transmission mode of each cell; if the UL DAI exists (that is, the UE configures PUCCH format 3 or format X to transmit HARQ-ACK, and the PUSCH for transmitting HARQ-ACK is scheduled by PDCCH/EPDCCH which exists in the UL DAI field), the number of bits of HARQ-ACK information that the UE needs to transmit is counted according to the transport blocks of the UL DAI at this time is the UL DAI, which is specifically the same as the aforementioned method for determining the number of bits of HARQ-ACK according to the UL DAI.
In the following, it is assumed that the UE configures 6 cells, which are all FDD cells, wherein 2 cells configure a SIMO transmission mode, 4 cells configure a MIMO transmission mode, the HARQ-ACK transmission format configured by the UE is PUCCH format 3, the number of HARQ-ACK feedback information bits of the cell whose transmission mode is SIMO is 1, HARQ-ACK of the cell whose transmission mode is MIMO does not need to be spatially bundled, and the number of HARQ-ACK feedback information bits of the cell whose transmission mode is MIMO is 2. At this time, if the UL DAI is equal to 6, the HARQ-ACK bit transmitted in the PUSCH is 6.
The following description explains that the UE determines the number B of HARQ-ACK bits according to the detected PDCCH/EPDCCH and PDSCH numbers and the UL DAI valueDL. If HARQ-ACK does not perform spatial bundling
BDL＝WDAI UL+(2L)*ceiling((2a+b-WDAI UL)/(2L)) (1)
Wherein, WDAI ULThe total DAI or the reference DAI is obtained by the UE from the DL DCI of the PDCCH/EPDCCH, and is used for calculating the HARQ-ACK bit number;
ceiling () is a ceiling function;
wherein a represents the sum of the number of serving cell PDSCHs of which the transmission mode is MIMO and the number of PDCCH/EPDCCH indicating downlink SPS release detected by the UE, and b represents the sum of the number of serving cell PDSCHs of which the transmission mode is SIMO and the number of PDCCH/EPDCCH indicating downlink SPS release detected by the UE. If spatial binding is performed, then
BDL＝(WDAI UL+(2L)*ceiling((a+b-WDAI UL)/(2L)) (2)
Wherein, WDAI ULThe total DAI or the reference DAI is obtained by the UE from the DL DCI of the PDCCH/EPDCCH, and is used for calculating the HARQ-ACK bit number;
ceiling () is a ceiling function;
wherein a represents the sum of the number of serving cell PDSCHs of which the transmission mode is MIMO and the number of PDCCH/EPDCCH indicating downlink SPS release detected by the UE, and b represents the sum of the number of serving cell PDSCHs of which the transmission mode is SIMO and the number of PDCCH/EPDCCH indicating downlink SPS release detected by the UE. L in the equations (1) and (2) is the bit number of UL DAI in UL Grant, or the bit number of total DAI obtained in DL DCI, or the bit number of reference DAI.
EXAMPLE III
In this embodiment, a time-frequency resource weighting coefficient used for transmission of HARQ-ACK feedback information of each cell in a PUSCH is determined according to a value of UL DAI, and a time-frequency resource amount occupied by the HARQ-ACK feedback information is determined according to the time-frequency resource weighting coefficient. Since values of UL DAI are involved, the present embodiment is only applicable to the case of transmitting HARQ-ACK in PUSCH.
First, the bit number of the HARQ-ACK feedback information is determined by the number of cells configured by the UE and the transmission mode of the configured cells, regardless of the UL DAI. If the UE configures PUCCH format 3 transmission HARQ-ACK or the UE configures PUCCH format X transmission HARQ-ACK, for the transmission in the PUSCH, for the cell with the transmission mode of SIMO (Single input multiple output), the bit number required by the HARQ-ACK feedback information is 1; for a cell with a transmission mode of MIMO (multiple input multiple output), the number of bits required for HARQ-ACK feedback information is 2. Calculating the bit number M required by HARQ-ACK feedback information of all cells configured by the UE in an uplink subframe according to the transmission modes of all the cells configured by the UE, and if the sum M of the bit numbers of the HARQ-ACK feedback information of all the cells required to be transmitted by the UE is calculated according to the transmission modes of the configured cells and is less than or equal to N (for example, for PUCCH format 3, N is 20), the HARQ-ACK information of all the cells does not need to be spatially bundled, so that for the cell with the transmission mode of SIMO, the bit number of the HARQ-ACK feedback information is 1; for the cell with the MIMO transmission mode, the HARQ-ACK feedback information bit number is 2. Calculating the bit number M required by HARQ-ACK feedback information of all cells configured by the UE in an uplink subframe according to the transmission modes of all the cells configured by the UE, and if the sum M of the bit numbers of the HARQ-ACK feedback information of all the cells required to be transmitted by the UE is calculated according to the transmission mode of the configured cells and is greater than N (for example, for PUCCH format 3, N is 20), the HARQ-ACK information of the cells with MIMO configured transmission modes needs to be spatially bundled, so that for the cells with SIMO transmission modes, the bit number of the HARQ-ACK feedback information is 1; for the cell with the MIMO transmission mode, the HARQ-ACK feedback information bit number is 1. Of course, for the cell with the MIMO transmission mode, as in the embodiment, it may also indicate whether the HARQ-ACK information is spatially bundled through higher layer signaling configuration or physical layer signaling. The following describes determining the time-frequency resource weighting coefficients used for transmitting the HARQ-ACK feedback information of each cell in the PUSCH according to the value of the UL DAI.
And if the UE configures PUCCH format 3 transmission HARQ-ACK or the UE configures PUCCH format X transmission HARQ-ACK, the time-frequency resource weighting coefficient is 1 when the transmission in the PUSCH is scheduled by the PDCCH/EPDCCH without the UL DAI domain or the transmission of the PUSCH is not scheduled by the detected PDCCH/EPDCCH. And if the UE configures PUCCH format 3 transmission HARQ-ACK or the UE configures PUCCH format X transmission HARQ-ACK, the time-frequency resource weighting coefficient is determined according to UL DAI when the transmission is carried out in the PUSCH and the transmission of the PUSCH is scheduled by PDCCH/EPDCCH with the UL DAI domain. The corresponding relationship between the UL DAI and the time-frequency resource weighting coefficient is shown in table 2.
Table 2: corresponding relation table of UL DAI and time frequency resource weighting coefficient
Figure BDA0002903669330000211
Figure BDA0002903669330000221
As can be seen from the above, the method for determining the time-frequency resource weighting coefficient specifically includes:
if the UE configures PUCCH format 3 or format X for transmitting HARQ-ACK and transmits HARQ-ACK on PUSCH, and the transmission of the PUSCH is scheduled by PDCCH/EPDCCH with UL DAI domain, determining a time-frequency resource weighting coefficient corresponding to UL DAI carried in PDCCH/EPDCCH for scheduling the current uplink subframe according to a preset corresponding relation between the UL DAI and the time-frequency resource weighting coefficient; the corresponding relationship can be shown in table 2, and certainly, the corresponding relationship is not limited thereto and can be set as required;
and if the UE configures PUCCH format 3 or format X transmission HARQ-ACK and transmits in the PUSCH, and the transmission of the PUSCH is scheduled by the PDCCH/EPDCCH without the UL DAI domain, or if the transmission of the PUSCH of the UE is not scheduled by the detected PDCCH/EPDCCH, the time-frequency resource weighting coefficient is set as 1.
The time-frequency resource amount occupied by the invention for finally sending the HARQ-ACK feedback information on the PUSCH is the time-frequency resource amount determined according to the prior art multiplied by the weighting coefficient.
It can be seen from the above embodiments that, in the method for sending HARQ-ACK feedback information provided by the present invention, the length and the occupied time-frequency resource amount of the HARQ-ACK feedback information are determined according to the value of the UL DAI of the cell to which the PUSCH for sending the HARQ-ACK feedback information belongs, so that correct HARQ-ACK feedback information transmission can be performed in CA systems with different uplink and downlink configurations of multiple cells, and thus different uplink and downlink configurations of multiple CCs for carrier aggregation are effectively supported.
The foregoing is a specific implementation of the HARQ-ACK transmission method in the present application. The application also provides HARQ-ACK transmission equipment of the enhanced carrier aggregation system, which can be used for implementing the transmission method. The basic structure of the device comprises: the device comprises a receiving unit, a total number of bits determining unit and a transmitting unit.
The receiving unit is used for receiving the PDCCH/EPDCCH and the PDSCH sent by the base station. And a bit total number determining unit, configured to determine, according to the UL DAI acquired in the UL Grant, the number of PDSCH subframes received in the HARQ-ACK bundling window, and the number of PDCCH/EPDCCH subframes indicating downlink semi-persistent scheduling (SPS) release, or according to the number or transmission mode of all cells configured by the UE, the total number of bits of HARQ-ACK feedback information sent by all cells configured by the UE through the PUSCH or PUCCH in the current uplink subframe. And the transmission unit is used for transmitting the HARQ-ACK feedback information of all the cells on the PUSCH or PUCCH of the current uplink subframe.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (10)

1. A HARQ-ACK transmission method for a hybrid automatic repeat request-acknowledgement (HARQ-ACK) of an enhanced carrier aggregation system is characterized by comprising the following steps:
user Equipment (UE) receives a physical downlink control channel/an enhanced physical downlink control channel and a physical downlink shared channel sent by a base station;
the UE determines whether the HARQ-ACK of the serving cell with the MIMO transmission mode carries out space binding transmission according to the high-level signaling;
determining the bit number of HARQ-ACK feedback information sent by each cell configured by the UE in the current uplink subframe through a Physical Uplink Shared Channel (PUSCH) or a Physical Uplink Control Channel (PUCCH) according to whether the HARQ-ACK carries out space binding transmission or not;
the UE transmits HARQ-ACK feedback information of all the cells on a PUSCH or PUCCH of a current uplink subframe,
the method for determining the number of bits for each cell configured by the UE to send HARQ-ACK feedback information in the current uplink subframe through the physical uplink shared channel PUSCH or the physical uplink control channel PUCCH includes:
when HARQ-ACK of the serving cell in the MIMO transmission mode adopts space binding transmission, the number of bits of HARQ-ACK feedback information of the serving cells in the SIMO transmission mode and the MIMO transmission mode is 1; and when the HARQ-ACK of the serving cell in the MIMO transmission mode does not adopt space binding transmission, the HARQ-ACK feedback information bit number of the serving cell in the MIMO transmission mode is 2, and the HARQ-ACK feedback information bit number of the serving cell in the SIMO transmission mode is 1.
2. The method according to claim 1, wherein if the UE configures PUCCH format 3 or format X for HARQ-ACK transmission and transmits HARQ-ACK on PUSCH, the UE determines the total number of bits of all cell HARQ-ACK feedback information transmitted in the current uplink subframe according to the configured transmission modes of all cells;
the method further comprises the following steps: determining a time-frequency resource weighting coefficient when HARQ-ACK is transmitted according to UL DAI included in a physical downlink control channel/an enhanced physical downlink control channel of the scheduled current uplink subframe;
and when the HARQ-ACK of all the cells is transmitted, determining the time-frequency resource amount occupied when the HARQ-ACK is fed back according to the time-frequency resource weighting coefficient.
3. The method of claim 2, wherein the determining the total number of bits for all cell HARQ-ACK feedback information transmitted in the current uplink subframe comprises:
determining whether HARQ-ACK of a service cell with a transmission mode of MIMO carries out space binding transmission according to a high-level signaling;
determining the bit number of HARQ-ACK feedback information of each cell according to the configured transmission mode of each cell; when HARQ-ACK of a serving cell in an MIMO transmission mode adopts space binding transmission, the number of bits of HARQ-ACK feedback information of the serving cells in the SIMO transmission mode and the MIMO transmission mode is 1; when the HARQ-ACK of the serving cell in the MIMO transmission mode does not adopt space binding transmission, the number of bits of HARQ-ACK feedback information of the serving cell in the MIMO transmission mode is 2, and the number of bits of HARQ-ACK feedback information of the serving cell in the SIMO transmission mode is 1;
and summing the configured bit numbers of the HARQ-ACK feedback information of all the service cells, and taking the summation result as the total number of the bits of the HARQ-ACK feedback information of all the cells transmitted in the current uplink subframe.
4. A User Equipment (UE), comprising: the device comprises a receiving unit, a bit total number determining unit and a transmitting unit;
the receiving unit is used for receiving a physical downlink control channel/an enhanced physical downlink control channel and a physical downlink shared channel sent by a base station;
the bit total number determining unit determines whether the HARQ-ACK of the service cell with the transmission mode of MIMO carries out space binding transmission according to the high-level signaling; determining the bit number of HARQ-ACK feedback information sent by all cells configured by the UE through a PUSCH or PUCCH in a current uplink subframe according to whether the HARQ-ACK carries out space binding transmission or not;
the transmission unit is used for transmitting the HARQ-ACK feedback information of all the cells on the PUSCH or PUCCH of the current uplink subframe,
wherein the total number of bits determining unit is configured to:
when HARQ-ACK of a serving cell in an MIMO transmission mode adopts space binding transmission, determining the bit number of HARQ-ACK feedback information to be 1 for the serving cells in the SIMO transmission mode and the MIMO transmission mode; and when the HARQ-ACK of the serving cell in the MIMO transmission mode does not adopt space binding transmission, determining that the bit number of the HARQ-ACK feedback information of the serving cell in the MIMO transmission mode is 2, and determining that the bit number of the HARQ-ACK feedback information of the serving cell in the SIMO transmission mode is 1.
5. A HARQ-ACK receiving method for hybrid automatic repeat request response of an enhanced carrier aggregation system is characterized by comprising the following steps:
a base station sends a physical downlink control channel/an enhanced physical downlink control channel and a physical downlink shared channel;
the base station sends a high-level signaling indicating whether HARQ-ACK of a serving cell with a transmission mode of MIMO carries out space binding transmission to UE;
the base station receives HARQ-ACK feedback information of all cells on a Physical Uplink Shared Channel (PUSCH) or a Physical Uplink Control Channel (PUCCH) of a current uplink subframe; wherein the bit number of each cell transmitting HARQ-ACK feedback information in the current uplink subframe through PUSCH or PUCCH is determined according to whether the HARQ-ACK carries out space binding transmission or not,
the determination mode of the bit number for sending the HARQ-ACK feedback information in the current uplink subframe through a Physical Uplink Shared Channel (PUSCH) or a Physical Uplink Control Channel (PUCCH) comprises the following steps:
when HARQ-ACK of the serving cell in the MIMO transmission mode adopts space binding transmission, the number of bits of HARQ-ACK feedback information of the serving cells in the SIMO transmission mode and the MIMO transmission mode is 1; and when the HARQ-ACK of the serving cell in the MIMO transmission mode does not adopt space binding transmission, the HARQ-ACK feedback information bit number of the serving cell in the MIMO transmission mode is 2, and the HARQ-ACK feedback information bit number of the serving cell in the SIMO transmission mode is 1.
6. The method according to claim 5, wherein if the UE configures PUCCH format 3 or format X for HARQ-ACK transmission and transmits HARQ-ACK on PUSCH, the UE determines the total number of bits of all cell HARQ-ACK feedback information transmitted in the current uplink subframe according to the transmission modes of all cells;
the UE determines a time-frequency resource weighting coefficient when HARQ-ACK is transmitted according to UL DAI contained in a physical downlink control channel/an enhanced physical downlink control channel of the current uplink subframe; and when the HARQ-ACK of all the cells is transmitted, determining the time-frequency resource amount occupied when the HARQ-ACK is fed back according to the time-frequency resource weighting coefficient.
7. The method of claim 6, wherein the determining the total number of bits for all cell HARQ-ACK feedback information transmitted in the current uplink subframe comprises:
determining whether HARQ-ACK of a service cell with a transmission mode of MIMO carries out space binding transmission according to a high-level signaling;
determining the bit number of HARQ-ACK feedback information of each cell according to the configured transmission mode of each cell; when HARQ-ACK of a serving cell in an MIMO transmission mode adopts space binding transmission, the number of bits of HARQ-ACK feedback information of the serving cells in the SIMO transmission mode and the MIMO transmission mode is 1; when the HARQ-ACK of the serving cell in the MIMO transmission mode does not adopt space binding transmission, the number of bits of HARQ-ACK feedback information of the serving cell in the MIMO transmission mode is 2, and the number of bits of HARQ-ACK feedback information of the serving cell in the SIMO transmission mode is 1;
and summing the configured bit numbers of the HARQ-ACK feedback information of all the service cells, and taking the summation result as the total number of the bits of the HARQ-ACK feedback information of all the cells transmitted in the current uplink subframe.
8. A base station apparatus, characterized in that the apparatus comprises: a transmitting unit and a receiving unit;
the sending unit is used for sending a physical downlink control channel/an enhanced physical downlink control channel and a physical downlink shared channel, and sending a high-level signaling indicating whether HARQ-ACK of a serving cell with a transmission mode of MIMO performs space binding transmission to the UE;
the receiving unit is used for receiving HARQ-ACK feedback information of all cells on a Physical Uplink Shared Channel (PUSCH) or a Physical Uplink Control Channel (PUCCH) of a current uplink subframe; wherein the bit number of each cell transmitting HARQ-ACK feedback information in the current uplink subframe through PUSCH or PUCCH is determined according to whether the HARQ-ACK carries out space binding transmission or not,
the determination mode of the bit number for sending the HARQ-ACK feedback information in the current uplink subframe through a Physical Uplink Shared Channel (PUSCH) or a Physical Uplink Control Channel (PUCCH) comprises the following steps:
when HARQ-ACK of the serving cell in the MIMO transmission mode adopts space binding transmission, the number of bits of HARQ-ACK feedback information of the serving cells in the SIMO transmission mode and the MIMO transmission mode is 1; and when the HARQ-ACK of the serving cell in the MIMO transmission mode does not adopt space binding transmission, the HARQ-ACK feedback information bit number of the serving cell in the MIMO transmission mode is 2, and the HARQ-ACK feedback information bit number of the serving cell in the SIMO transmission mode is 1.
9. The base station device according to claim 8, wherein if the UE configures PUCCH format 3 or format X for HARQ-ACK transmission and transmits HARQ-ACK on PUSCH, the UE determines a total number of bits of all cell HARQ-ACK feedback information transmitted in the current uplink subframe according to transmission modes of all cells;
the UE determines a time-frequency resource weighting coefficient when HARQ-ACK is transmitted according to UL DAI contained in a physical downlink control channel/an enhanced physical downlink control channel of the current uplink subframe; and when the HARQ-ACK of all the cells is transmitted, determining the time-frequency resource amount occupied when the HARQ-ACK is fed back according to the time-frequency resource weighting coefficient.
10. The base station device of claim 9, wherein the determining the total number of bits of all cell HARQ-ACK feedback information transmitted in the current uplink subframe comprises:
determining whether HARQ-ACK of a service cell with a transmission mode of MIMO carries out space binding transmission according to a high-level signaling;
determining the bit number of HARQ-ACK feedback information of each cell according to the configured transmission mode of each cell; when HARQ-ACK of a serving cell in an MIMO transmission mode adopts space binding transmission, the number of bits of HARQ-ACK feedback information of the serving cells in the SIMO transmission mode and the MIMO transmission mode is 1; when the HARQ-ACK of the serving cell in the MIMO transmission mode does not adopt space binding transmission, the number of bits of HARQ-ACK feedback information of the serving cell in the MIMO transmission mode is 2, and the number of bits of HARQ-ACK feedback information of the serving cell in the SIMO transmission mode is 1;
and summing the configured bit numbers of the HARQ-ACK feedback information of all the service cells, and taking the summation result as the total number of the bits of the HARQ-ACK feedback information of all the cells transmitted in the current uplink subframe.
CN202110065416.1A 2015-01-29 2015-08-13 HARQ-ACK transmission method and device for enhanced carrier aggregation system Pending CN112910611A (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
CN201510048140 2015-01-29
CN2015100481400 2015-01-29
CN201510184434.6A CN106160983A (en) 2015-01-29 2015-04-17 A kind of HARQ-ACK transmission method strengthening carrier aggregation system and equipment
CN2015101844346 2015-04-17
CN201510498447.0A CN105846977B (en) 2015-01-29 2015-08-13 HARQ-ACK transmission method and device for enhanced carrier aggregation system

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
CN201510498447.0A Division CN105846977B (en) 2015-01-29 2015-08-13 HARQ-ACK transmission method and device for enhanced carrier aggregation system

Publications (1)

Publication Number Publication Date
CN112910611A true CN112910611A (en) 2021-06-04

Family

ID=56580809

Family Applications (2)

Application Number Title Priority Date Filing Date
CN201510498447.0A Active CN105846977B (en) 2015-01-29 2015-08-13 HARQ-ACK transmission method and device for enhanced carrier aggregation system
CN202110065416.1A Pending CN112910611A (en) 2015-01-29 2015-08-13 HARQ-ACK transmission method and device for enhanced carrier aggregation system

Family Applications Before (1)

Application Number Title Priority Date Filing Date
CN201510498447.0A Active CN105846977B (en) 2015-01-29 2015-08-13 HARQ-ACK transmission method and device for enhanced carrier aggregation system

Country Status (2)

Country Link
KR (1) KR102594361B1 (en)
CN (2) CN105846977B (en)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7163277B2 (en) * 2016-08-21 2022-10-31 エルジー エレクトロニクス インコーポレイティド Method and apparatus for uplink transmission in wireless communication system
CN108306720B (en) * 2017-01-13 2022-06-21 北京三星通信技术研究有限公司 Method and equipment for transmitting UCI information
CN108811093B (en) * 2017-04-28 2022-02-08 大唐移动通信设备有限公司 Transmission method and device of downlink channel
CN109391422B (en) * 2017-08-11 2020-11-17 华为技术有限公司 Method for determining feedback codebook, terminal equipment and network equipment
CN109586856B (en) * 2017-09-29 2024-03-29 北京三星通信技术研究有限公司 Method for transmitting and configuring HARQ-ACK feedback information, corresponding user equipment and base station
CN109474371B (en) * 2017-09-08 2024-01-19 北京三星通信技术研究有限公司 HARQ-ACK information feedback method and device
CA3083889C (en) * 2017-11-17 2023-08-29 Zte Corporation Codebook feedback for data retransmissions
CN117375773A (en) 2018-01-11 2024-01-09 北京三星通信技术研究有限公司 Method and equipment for transmitting HARQ-ACK information
CN110034868B (en) * 2018-01-11 2023-09-29 北京三星通信技术研究有限公司 Method and equipment for transmitting HARQ-ACK information
CN110351018B (en) * 2018-04-04 2021-12-24 展讯通信（上海）有限公司 HARQ-ACK feedback information sending and receiving method and device, storage medium, sending terminal and receiving terminal
CN110351016B (en) * 2018-04-04 2021-11-19 展讯通信（上海）有限公司 Transmission method and device of downlink control information
WO2020032753A1 (en) 2018-08-09 2020-02-13 엘지전자 주식회사 Method and device for transmitting and receiving wireless signal in wireless communication system
US11490412B2 (en) * 2018-08-10 2022-11-01 Lg Electronics Inc. Method for transmitting or receiving signal in wireless communication system supporting unlicensed band, and apparatus supporting same
US20210259006A1 (en) * 2018-08-21 2021-08-19 Ntt Docomo, Inc. Terminal, radio communication method, base station, and system
KR20200050812A (en) * 2018-11-02 2020-05-12 삼성전자주식회사 Method and apparatus for transmitting and receiving data and feedback in wirelss communication system
CN111525978B (en) * 2019-02-01 2022-11-08 中兴通讯股份有限公司 Index information sending method and device, storage medium and electronic device
CN111865510B (en) 2019-04-30 2021-11-23 大唐移动通信设备有限公司 HARQ-ACK transmission method, user equipment and network side equipment
KR20200143126A (en) 2019-06-14 2020-12-23 삼성전자주식회사 Apparatus and method for managing uplink control channels in wireless communication system
US20220294568A1 (en) * 2019-08-07 2022-09-15 Beijing Xiaomi Mobile Software Co., Ltd. Harq feedback enhancement method and apparatus, communication device and storage medium
CN114614954A (en) * 2020-12-08 2022-06-10 上海朗帛通信技术有限公司 Method and apparatus in a node used for wireless communication
WO2023211200A1 (en) * 2022-04-27 2023-11-02 엘지전자 주식회사 Method and device for transmitting and receiving signal in wireless communication system

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101840199B1 (en) * 2010-11-02 2018-03-20 엘지전자 주식회사 Method and device for transmitting/receiving uplink control information in wireless communication system
US8594022B2 (en) * 2010-11-03 2013-11-26 Samsung Electronics Co., Ltd. Method and apparatus for coding of HARQ-ACK transmission in TDD systems with downlink carrier aggregation
CN102468950B (en) * 2010-11-15 2015-01-21 华为技术有限公司 Information transmission method, terminal, base station and communication system
JP5932974B2 (en) * 2011-05-12 2016-06-08 エルジー エレクトロニクス インコーポレイティド Method for transmitting control information and apparatus therefor
EP3094024B1 (en) * 2011-05-17 2018-12-12 Lg Electronics Inc. Method for trasmitting control information and device for same
CN107135052B (en) * 2011-05-31 2021-02-02 北京三星通信技术研究有限公司 Method for sending HARQ-ACK feedback information
WO2013017154A1 (en) * 2011-07-29 2013-02-07 Fujitsu Limited Control channel for wireless communication
WO2013043025A2 (en) * 2011-09-23 2013-03-28 엘지전자 주식회사 Method for transmitting control information and apparatus for same
CN103095432A (en) * 2011-11-07 2013-05-08 北京三星通信技术研究有限公司 Method for sending hybridautomatic repeat-request acknowledgement (HARQ-ACK) feedback information
US9749094B2 (en) * 2012-06-14 2017-08-29 Sharp Kabushiki Kaisha Devices for sending and receiving feedback information
CN109412775B (en) * 2012-06-27 2021-08-03 北京三星通信技术研究有限公司 Method for sending HARQ-ACK feedback information

Also Published As

Publication number Publication date
CN105846977B (en) 2021-02-02
KR102594361B1 (en) 2023-10-26
CN105846977A (en) 2016-08-10
KR20160093532A (en) 2016-08-08

Similar Documents

Publication Publication Date Title
CN105846977B (en) HARQ-ACK transmission method and device for enhanced carrier aggregation system
US11728936B2 (en) Method and apparatus for transmitting/receiving HARQ-ACK signal in wireless communication system supporting carrier aggregation
CN106060930B (en) HARQ-ACK transmission method and device for enhanced carrier aggregation system
CN109412775B (en) Method for sending HARQ-ACK feedback information
JP6500164B2 (en) Uplink control information transmission method and apparatus
CN107135052B (en) Method for sending HARQ-ACK feedback information
CN106533638B (en) Communication method and device for carrier aggregation system
EP2846488B1 (en) Carrier aggregation feedback method, device and system for different tdd uplink/downlink configurations
KR101814437B1 (en) Method and apparatus
KR102120701B1 (en) Method and apparatus for transmitting harq-ack feedback information by a user equipment in a wireless communication system
CN109474371B (en) HARQ-ACK information feedback method and device
CN103516499B (en) A kind of ACK/NACK number of bits of feedback determines method and device
US20120134305A1 (en) Hybrid automatic repeat request feedback transmission in a multi component-carrier communication system
CN105743619A (en) Hybrid automatic repeat request (HARQ) transmission method and apparatus
WO2018018620A1 (en) Method of feeding back ack/nack information, terminal equipment, and network equipment
KR20120093084A (en) Method and apparatus for assigning response channel resources
CN106160957B (en) HARQ-ACK information feedback method and device
WO2014179958A1 (en) Method, apparatus and computer program for wireless communications
CN105790897B (en) Method and equipment for hybrid automatic repeat request (HARQ)
CN104348597A (en) PUSCH (physical uplink shared channel) scheduling and HARQ-ACK (hybrid automatic repeat request-acknowledgement) information transmission method
US20150207594A1 (en) Method for implementing harq feedback, and method and device for allocating uplink subframe
EP3499765B1 (en) Method for sending hybrid automatic repeat request feedback information, and user equipment
CN113438059B (en) HARQ-ACK transmission method and device for enhanced carrier aggregation system
KR20170112930A (en) Method and apparatus for harq operation supporting uplink data transmission in special subframe in wireless communication system
CN102404788B (en) Method, system and equipment for transmitting downlink dynamic scheduling information

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination