CN110138523B

CN110138523B - Feedback codebook determination method and device

Info

Publication number: CN110138523B
Application number: CN201810129291.2A
Authority: CN
Inventors: 司倩倩; 高雪娟; 王磊
Original assignee: Telecommunications Science and Technology Research Institute Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2018-02-08
Filing date: 2018-02-08
Publication date: 2021-05-07
Anticipated expiration: 2038-02-08
Also published as: WO2019154126A1; CN110138523A

Abstract

The invention provides a method and a device for determining a feedback codebook, and relates to the technical field of communication. The feedback codebook determining method comprises the following steps: acquiring the number of first PDCCHs transmitted in a PDCCH detection opportunity of a carrier; determining the length of target feedback information of one PDCCH detection opportunity of one carrier according to the first PDCCH number; and determining feedback codebook information according to the length of the target feedback information. According to the scheme, the length of the target feedback information of one PDCCH detection opportunity of one carrier is determined according to the number of the first PDCCHs transmitted in one PDCCH detection opportunity of one carrier, and then the feedback codebook information is determined according to the length of the target feedback information, so that a more accurate semi-static feedback codebook can be generated, the transmission performance of a system is ensured, and the reliability of network communication is improved.

Description

Feedback codebook determination method and device

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for determining a feedback codebook.

Background

In 5G (5th-Generation, fifth Generation mobile communication technology) NR (New Radio interface), a scheduling method using a cross-slot is supported, so that in one PDCCH (Physical Downlink Control Channel) detection opportunity, more than one PDCCH for scheduling Downlink data transmission of different slots or different lengths in the same slot may be transmitted. As shown in fig. 1, two PDCCHs are transmitted in PDCCH detection opportunities of

time slots

0, 2, 4, and 6, and are respectively used for scheduling Downlink data transmission in n +2 and n +3, where a grid filling box represents a PDCCH detection opportunity, a diagonal filling box represents a PDSCH (Physical Downlink Shared Channel) feedback in the same feedback window, a horizontal filling box represents HARQ-ACK (Hybrid Automatic Repeat request Acknowledgement) feedback, a dashed arrow represents PDCCH-PDSCH scheduling timing, and a solid arrow represents PDSCH-HARQ-ACK feedback timing.

At present, when the semi-static feedback codebook is determined, the situation is not considered, and an error semi-static feedback codebook may be generated. For example, in the example of fig. 1, there are 4 PDCCH detection opportunities corresponding to a PDSCH in a feedback window, when a feedback codebook is generated, if CBG (Code Block Group) and multi-codeword transmission are not configured, 4-bit feedback information is correspondingly generated, but actually two PDCCHs are transmitted in each PDCCH detection opportunity, 8 PDSCH transmissions in the feedback window are scheduled, and there are 4 PDSCHs without feedback information using the existing semi-static codebook scheme.

At present, when determining a semi-static feedback codebook, a condition that more than one PDCCH for scheduling downlink data transmission of different time slots or different lengths in the same time slot may be transmitted in one PDCCH detection opportunity is not considered, which may cause an erroneous semi-static feedback codebook to be generated, thereby affecting the transmission performance of a system.

Disclosure of Invention

The embodiment of the invention provides a method and a device for determining a feedback codebook, which are used for solving the problems that in the existing scheme for determining a semi-static feedback codebook, the condition that more than one PDCCH (physical downlink control channel) used for scheduling downlink data transmission with different time slots or different lengths in the same time slot can be transmitted in one PDCCH (physical downlink control channel) detection opportunity is not considered, so that the generated semi-static feedback codebook is inaccurate and the transmission performance of a system is influenced.

In order to solve the above technical problem, an embodiment of the present invention provides a method for determining a feedback codebook, including:

acquiring the number of first PDCCHs transmitted in a PDCCH detection opportunity of a carrier;

determining the length of target feedback information of one PDCCH detection opportunity of one carrier according to the first PDCCH number;

and determining feedback codebook information according to the length of the target feedback information.

Further, the acquiring the number of the first PDCCHs transmitted in one PDCCH detection opportunity of one carrier includes one of the following manners:

determining the number of control information resource sets configured in one PDCCH detection opportunity of one carrier as the number of first PDCCHs;

determining the sum of the search space numbers of PDCCHs which are configured in all control information resource sets in one PDCCH detection opportunity of one carrier and used for transmitting HARQ-ACK feedback needing hybrid automatic repeat request information as a first PDCCH number;

determining the sum of the number of PDCCH candidate sets corresponding to a search space which needs HARQ-ACK feedback and is configured in all control information resource sets in one PDCCH detection opportunity of one carrier as a first PDCCH number;

determining the sum of the number of Control Channel Elements (CCEs) contained in all control information resource sets in one PDCCH detection opportunity of one carrier as the first PDCCH number;

acquiring a first PDCCH number predefined by a protocol;

acquiring the quantity of first PDCCHs configured by a base station through high-level signaling;

and determining the first PDCCH number according to the PDCCH detection opportunity period.

Further, when the first PDCCH amount is determined by a sum of PDCCH candidate sets corresponding to a search space required to perform HARQ-ACK feedback and configured in at least one control information resource set in one PDCCH detection opportunity of one carrier, the PDCCH corresponding to the search space required to perform HARQ-ACK feedback is scrambled by a cell radio network temporary identifier or a semi-persistent scheduling radio network temporary identifier.

Further, the determining the first PDCCH number according to the PDCCH detection opportunity period includes one of the following ways:

determining a PDCCH detection opportunity period as a first PDCCH number;

and determining the number of the first PDCCH according to the PDCCH detection opportunity period and the PDSCH resource allocation information of the radio resource control configuration.

Further, when the first PDCCH number is configured by the base station through high layer signaling, the first PDCCH number is an integer greater than or equal to 1 and less than or equal to 4.

Further, the step of determining a length of target feedback information of one PDCCH detection opportunity for one carrier according to the first PDCCH number includes:

according to the formula: obtaining the length of target feedback information of one PDCCH detection opportunity of one carrier, wherein N is A1 multiplied by A2 multiplied by A3;

wherein, N is the length of the target feedback information of one PDCCH detection opportunity of one carrier; a1 is a first PDCCH number transmitted in one PDCCH detection opportunity of one carrier; a2 is the number of transport blocks configured for the carrier; a3 is the number of maximum code block groups CBG configured for a carrier.

Further, the step of determining feedback codebook information according to the length of the target feedback information includes:

determining feedback information of each PDCCH in a PDCCH detection opportunity of a carrier;

and according to the sequencing of the PDCCHs, cascading the feedback information of each PDCCH according to the length of the target feedback information, and determining the feedback codebook information of one PDCCH detection opportunity of one carrier.

Further, the determining feedback information of each PDCCH in one PDCCH detection opportunity of one carrier includes one of the following ways:

when the carrier is not configured with HARQ-ACK feedback based on CBG, determining one bit of feedback information for each transmission block, and for each PDCCH, cascading the feedback information corresponding to at least one transmission block according to the sequence of the transmission blocks to obtain the feedback information corresponding to the PDCCH;

when the carrier wave configures HARQ-ACK feedback based on CBG, the feedback information corresponding to at least one CBG is cascaded according to the order of the CBG to obtain the feedback information corresponding to the transmission block, and for each PDCCH, the feedback information corresponding to at least one transmission block is cascaded according to the order of the transmission block to obtain the feedback information corresponding to the PDCCH;

when the carrier wave configures HARQ-ACK feedback based on CBG, for each CBG, cascading feedback information corresponding to two transport blocks, and according to the order of the CBG, cascading the feedback information corresponding to at least one CBG to obtain the feedback information corresponding to the PDCCH.

Further, the determination of the ordering of the PDCCHs comprises one of the following:

if the first PDCCH number is the number of control information resource sets configured in one PDCCH detection opportunity of one carrier, determining the sequencing of the PDCCHs according to the identification information of the control information resource sets corresponding to the PDCCHs;

if the first PDCCH number is the sum of the number of search spaces which are configured in at least one control information resource set in one PDCCH detection opportunity of one carrier and used for transmitting the PDCCH needing HARQ-ACK feedback, determining the sequencing of the PDCCHs according to the identification information of the control information resource set corresponding to the PDCCH and the identification information of the search spaces;

if the first PDCCH number is the sum of the number of PDCCH candidate sets corresponding to a search space which is configured in at least one control information resource set in one PDCCH detection opportunity of one carrier and needs HARQ-ACK feedback, determining the sequencing of the PDCCHs according to the identification information of the control information resource set corresponding to the PDCCH, the identification information of the search space and the PDCCH candidate sequence in the search space;

if the first PDCCH number is the sum of the number of CCEs contained in at least one control information resource set in one PDCCH detection opportunity of one carrier, determining the sequencing of the PDCCHs according to the identification information of the control information resource set corresponding to the PDCCH and the sequencing of the identification information of the CCEs in the control information resource set;

and if the number of the first PDCCHs transmitted in one PDCCH detection opportunity of one carrier configured by the base station is more than 1, determining the sequencing of the PDCCHs according to the PDCCH sequencing indication information added in the downlink control information and the sequence of the PDCCH sequencing indication information from small to large.

Further, the method for determining a feedback codebook further includes:

and if the number of the PDCCHs is smaller than the first PDCCH number, filling non-response or non-continuous transmission feedback information in the position of the PDCCH feedback information corresponding to the undetected PDCCH.

The embodiment of the invention also provides a feedback codebook determining device, which comprises a memory, a processor and a computer program which is stored on the memory and can be run on the processor; wherein the processor implements the following steps when executing the computer program:

Further, the processor, when executing the computer program, implements one of the following steps:

acquiring a first PDCCH number predefined by a protocol;

determining a PDCCH detection opportunity period as a first PDCCH number;

Further, the processor, when executing the computer program, implements the steps of:

Further, in making the determination of the ordering of the PDCCHs, the processor, when executing the computer program, implements one of the following steps:

An embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the feedback codebook determination method described above.

An embodiment of the present invention further provides a device for determining a feedback codebook, including:

the device comprises an acquisition module, a detection module and a processing module, wherein the acquisition module is used for acquiring the number of first Physical Downlink Control Channels (PDCCH) transmitted in a PDCCH detection opportunity of a carrier;

a first determining module, configured to determine, according to the first PDCCH number, a length of target feedback information of one PDCCH detection opportunity of one carrier;

and the second determining module is used for determining the feedback codebook information according to the length of the target feedback information.

Further, the obtaining module is configured to perform one of the following:

acquiring a first PDCCH number predefined by a protocol;

determining a PDCCH detection opportunity period as a first PDCCH number;

Further, the first determining module is configured to:

Further, the second determining module includes:

a first determining unit, configured to determine feedback information of each PDCCH in one PDCCH detection opportunity of one carrier;

and a second determining unit, configured to concatenate the feedback information of each PDCCH according to the length of the target feedback information according to the sorting of the PDCCHs, and determine feedback codebook information of one PDCCH detection opportunity of one carrier.

Further, the first determination unit is configured to perform one of the following:

Further, the feedback codebook determining apparatus further includes:

and the filling module is used for filling non-response or non-continuous transmission feedback information in the position of PDCCH feedback information corresponding to the undetected PDCCH if the number of the PDCCHs is smaller than the first PDCCH number.

The invention has the beneficial effects that:

according to the scheme, the length of the target feedback information of one PDCCH detection opportunity of one carrier is determined according to the number of the first PDCCHs transmitted in one PDCCH detection opportunity of one carrier, and then the feedback codebook information is determined according to the length of the target feedback information, so that a more accurate semi-static feedback codebook can be generated, the transmission performance of a system is ensured, and the reliability of network communication is improved.

Drawings

FIG. 1 is a diagram illustrating transmission of multiple PDCCHs for one PDCCH detection opportunity;

FIG. 2 is a flow chart illustrating a feedback codebook determination method according to an embodiment of the present invention;

FIG. 3 shows a diagram of one PDCCH detection opportunity transmitting 3 PDCCHs in case one;

fig. 4 is a diagram illustrating the sequence of HARQ-ACK bits generated in case one;

FIG. 5 shows a diagram of 4 PDCCH transmissions for one PDCCH detection opportunity in case two;

FIG. 6 is a diagram illustrating the sequence of HARQ-ACK bits generated in case two;

FIG. 7 shows a diagram of 4 PDCCH transmissions for one PDCCH detection opportunity in case three;

fig. 8 is a diagram illustrating the sequence of HARQ-ACK bits generated in case three;

FIG. 9 is a block diagram of a feedback codebook determining apparatus according to an embodiment of the present invention;

fig. 10 is a block diagram of a feedback codebook determining apparatus according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

Some concepts mentioned in the embodiments of the present invention are first explained as follows.

Currently in NR communication systems, supporting HARQ-ACK feedback uses a semi-static codebook scheme.

When using the semi-static codebook scheme for User configuration, first, a feedback window M needs to be determined, where M is defined as a slot interval between maximum and minimum data configured based on a high-level signaling and a slot interval value between multiple data configured to a UE (User Equipment, also referred to as a terminal) by the high-level signaling and feedback, and the UE may determine M PDCCH detection opportunities for DCI (Downlink Control Information) format 1_0 or DCI format 1_1 transmission, which correspond to the same PUCCH (Physical Uplink Control Channel) or PUSCH (Physical Uplink Shared Channel) feedback HARQ-ACK.

When a feedback codebook is generated, corresponding feedback bits are generated for each PDCCH detection opportunity on each carrier according to the sequence that the carrier index is increased first and then the PDCCH detection opportunity index is increased, and the specific process is as follows:

if the carrier is configured with HARQ-ACK without using space combination and does not use HARQ-ACK feedback based on CBG, and the current carrier is configured with two transmission blocks which need to be received, 1-bit feedback information is respectively generated for each transmission block, and 2-bit feedback information is generated for the current PDCCH detection opportunity of the current carrier;

if the carrier is configured with HARQ-ACK spatial combination, HARQ-ACK feedback based on CBG is not used, and the current carrier is configured with two transmission blocks needing to be received, performing logic and operation on 1-bit feedback information of the two transmission blocks, generating 1-bit feedback information for the current PDCCH detection opportunity of the current carrier, and if the terminal only receives one transmission block, assuming that the feedback information corresponding to the second transmission block is ACK;

if the carrier is configured to use the HARQ-ACK feedback based on the CBG and the current carrier is configured to need to receive two transmission blocks, respectively generating X-bit feedback information for each transmission block, wherein X is the maximum CBG number used on the carrier configured by the high-level signaling, and generating 2X-bit feedback information for the current PDCCH detection opportunity of the current carrier;

if the carrier is configured to use the HARQ-ACK feedback based on the CBG, and the current carrier is configured to need to receive a transmission block, the feedback information of X bits is generated for the current PDCCH detection opportunity of the current carrier, and X is the maximum CBG number used on the carrier configured by the high-level signaling.

The invention provides a method and a device for determining a feedback codebook, aiming at the problems that the semi-static feedback codebook is inaccurate and the transmission performance of a system is influenced because the condition that more than one PDCCH used for scheduling downlink data transmission with different time slots or different lengths in the same time slot can be transmitted in one PDCCH detection opportunity is not considered in the existing semi-static feedback codebook determination scheme.

As shown in fig. 2, a method for determining a feedback codebook according to an embodiment of the present invention includes:

step 21, acquiring the number of first PDCCHs transmitted in a PDCCH detection opportunity of a carrier;

it should be noted that the first PDCCH number refers to the maximum number of PDCCHs that can be transmitted in one PDCCH detection opportunity on one carrier.

Step 22, determining the length of the target feedback information of one PDCCH detection opportunity of one carrier according to the first PDCCH number;

the length of the target feedback information is specifically the number of bits of the target feedback information.

And step 23, determining feedback codebook information according to the length of the target feedback information.

The feedback codebook determining method may be applied to a terminal or a base station, that is, the terminal generates feedback codebook information according to the feedback codebook determining method and sends the feedback codebook information to the base station, and the base station determines the feedback codebook information sent by the terminal according to the feedback codebook determining method and receives the feedback codebook information at a corresponding position.

It should be noted that, step 21 may be implemented in one of the following manners:

determining the sum of the search space numbers, configured in all control information resource sets in one PDCCH detection opportunity of one carrier, for transmitting the PDCCH needing hybrid automatic repeat request information (HARQ-ACK) feedback as the first PDCCH number;

determining the sum of the number of PDCCH candidate sets corresponding to the search space needing HARQ-ACK feedback configured in all control information resource sets in one PDCCH detection opportunity of one carrier as the first PDCCH number;

it should be noted that, in this implementation, the PDCCH corresponding to the search space requiring HARQ-ACK feedback is scrambled by a cell radio network temporary identifier (C-RNTI) or a semi-persistent scheduling radio network temporary identifier (SPS-RNTI).

Determining the sum of the number of Control Channel Elements (CCEs) contained in all control information resource sets in one PDCCH detection opportunity of one carrier as the number of the first PDCCHs;

acquiring a first PDCCH quantity predefined by a protocol;

it should be noted that, in this way, the first PDCCH amount is predefined in the communication protocol standard, and the terminal or the base station can directly obtain the first PDCCH amount.

The sixth mode is that the first PDCCH quantity configured by the base station through the high-level signaling is obtained;

when the first PDCCH amount is configured to the terminal by the base station through a higher layer signaling (for example, a Radio Resource Control (RRC) signaling), the first PDCCH amount is an integer greater than or equal to 1 and less than or equal to 4.

And determining the number of the first PDCCH according to the PDCCH detection opportunity period.

Specifically, the seventh mode can be implemented in one of the following modes:

mode a1, determining a PDCCH detection opportunity period as a first PDCCH number;

in this implementation, the first number of PDCCHs is equal to the PDCCH detection opportunity period. For example, if a PDCCH detection opportunity period on one carrier is 2 slots, it indicates that there is one PDCCH detection opportunity in each 2 slots, and in order to ensure that downlink transmission in all slots can be scheduled, the number of first PDCCHs transmitted in one PDCCH detection opportunity (i.e., the maximum PDCCH number) is made to be 2.

Mode A2, determining the number of first PDCCH according to PDCCH detection opportunity period and Physical Downlink Shared Channel (PDSCH) resource allocation information configured by Radio Resource Control (RRC);

in this implementation, the first PDCCH amount is determined by a PDCCH detection opportunity period and RRC-configured PDSCH resource allocation information, and preferably, the first PDCCH amount is the maximum number of PDSCHs that can be transmitted in the PDCCH detection opportunity period and are not overlapped in a time domain, for example, the detection opportunity period is 1 time slot, but the minimum length of PDSCH transmission indicated in the RRC-configured PDSCH resource allocation information is 7 Orthogonal Frequency Division Multiplexing (OFDM) symbols, and then two PDSCHs are transmitted at most in one time slot (it should be noted that one time slot includes 14 OFDM symbols), so that the first PDCCH amount transmitted in one PDCCH detection opportunity is 2.

Further, the specific implementation manner of step 22 is:

Further, the specific implementation manner of step 23 is:

Specifically, the implementation manner of determining the feedback information of each PDCCH in one PDCCH detection opportunity of one carrier includes one of the following implementation manners:

mode B1, when the carrier is not configured with CBG-based HARQ-ACK feedback, determining one bit of feedback information for each transport block, and for each PDCCH, concatenating the feedback information corresponding to at least one transport block according to the order of the transport blocks to obtain feedback information corresponding to the PDCCH;

in this implementation manner, the feedback information corresponding to one PDCCH is determined and obtained according to the feedback information of each transmission block in the one PDCCH, and each transmission block is divided in sequence, so that in the cascade connection, the feedback information corresponding to the transmission block is cascaded one by one according to the division sequence of the transmission block to obtain the feedback information corresponding to the one PDCCH.

Mode B2, when the carrier configures CBG-based HARQ-ACK feedback, concatenating feedback information corresponding to at least one CBG according to the sequence of the CBGs to obtain feedback information corresponding to transport blocks, and for each PDCCH, concatenating feedback information corresponding to at least one transport block according to the sequence of the transport blocks to obtain feedback information corresponding to the PDCCH;

in this case, each transport block is divided into a plurality of CBGs, and each CBG is divided in sequence, so that when the transport blocks are cascaded, the feedback information corresponding to the CBGs is cascaded one by one according to the dividing sequence of the CBGs to obtain the feedback information corresponding to each transport block, and then the feedback information corresponding to the transport blocks is cascaded one by one according to the dividing sequence of the transport blocks to obtain the feedback information corresponding to one PDCCH.

And B3, when the carrier wave configures the HARQ-ACK feedback based on the CBG, cascading the feedback information corresponding to the two transport blocks for each CBG according to the order of the CBG, and obtaining the feedback information corresponding to the PDCCH by cascading the feedback information corresponding to at least one CBG.

In this case, each transport block is divided into a plurality of CBGs, when the feedback information corresponding to the CBGs at the corresponding positions in the feedback information corresponding to the two transport blocks is cascaded, and then, the feedback information corresponding to the CBGs after the completion of the cascade is cascaded one by one according to the division order of the CBGs, so as to obtain the feedback information corresponding to one PDCCH.

After the feedback information corresponding to each PDCCH is obtained, the feedback codebook information of one PDCCH detection opportunity of one carrier may be determined according to the ranking of the PDCCHs, and specifically, the determining manner of the ranking of the PDCCHs may adopt one of the following manners:

mode C1, if the first PDCCH amount is the number of control information resource sets configured in one PDCCH detection opportunity of one carrier, determining the ordering of the PDCCHs according to the identification information of the control information resource sets corresponding to the PDCCHs;

it should be noted that, if the first PDCCH amount is the number of control information resource sets configured in one PDCCH detection opportunity of one carrier, and at most one PDCCH is transmitted in each control information resource set, the order of the PDCCHs may be determined according to the identification information of the control information resource sets, and specifically, the identification information of the control information resource sets may be control information resource set IDs.

Mode C2, if the first PDCCH amount is the sum of the number of search spaces configured in at least one control information resource set in one PDCCH detection opportunity of one carrier and used for transmitting the PDCCH requiring HARQ-ACK feedback, determining the ordering of the PDCCHs according to the identification information of the control information resource set and the identification information of the search spaces corresponding to the PDCCHs;

it should be noted that, if the first PDCCH is the sum of the number of search spaces configured in at least one control information resource set in one PDCCH detection opportunity of one carrier and used for transmitting the PDCCH that needs to be subjected to HARQ-ACK feedback, and at most one PDCCH is transmitted in each search space, the ordering of the PDCCHs may be determined according to the identification information (for example, control information resource set ID) of the control information resource set corresponding to the PDCCH and the identification information (for example, search space ID) of the search space, for example, in each control information resource set, the ordering is performed according to different search space IDs corresponding to the PDCCHs; and then, sequencing the PDCCHs in the plurality of control information resource sets according to the sequence from small to large of the control information resource set IDs.

Mode C3, if the first PDCCH amount is the sum of the PDCCH candidate set amounts corresponding to the search space that needs HARQ-ACK feedback and is configured in at least one control information resource set in one PDCCH detection opportunity of one carrier, determining the PDCCH order according to the identification information of the control information resource set corresponding to the PDCCH, the identification information of the search space, and the PDCCH candidate order in the search space;

for example, within each search space, the PDCCH order is determined in the PDCCH candidate order in the search space; then, sequencing is carried out according to different search space IDs corresponding to the PDCCH in each control information resource set; and then, sequencing the PDCCHs in the plurality of control information resource sets according to the sequence from small to large of the control information resource set IDs.

Mode C4, if the first PDCCH amount is the sum of the number of CCEs included in at least one control information resource set in one PDCCH detection opportunity of one carrier, determining the ordering of PDCCHs according to the ordering of the identification information of the control information resource set corresponding to the PDCCH and the identification information of the CCEs in the control information resource set;

for example, within each control information resource set, the PDCCH order is determined according to the identification information (e.g., CCE ID) of the CCEs in the control information resource set; and then, sequencing the PDCCHs in the plurality of control information resource sets according to the sequence from small to large of the control information resource set IDs.

In a mode C5, if the number of first PDCCHs transmitted in one PDCCH detection opportunity of one carrier configured by the base station is greater than 1, determining the ordering of the PDCCHs according to the PDCCH ordering indication information in the order from small to large, according to PDCCH ordering indication information added in Downlink Control Information (DCI);

it should be noted that the number of bits of the PDCCH ordering indication information is usually determined by the first PDCCH number, i.e. the number of bits is determined by the first PDCCH

Wherein a is the first PDCCH number.

It should be further noted that, in the process of determining feedback codebook information according to the length of the target feedback information, if the number of detected PDCCHs is less than the first number of PDCCHs, non-acknowledgement (NACK) or Discontinuous Transmission (DTX) feedback information is filled in a PDCCH feedback information position where a PDCCH corresponding to the PDCCH is not detected.

The following describes specific applications of the present embodiment in different cases.

Situation one,

Assuming that a base station configures a terminal to use a semi-static codebook scheme for feedback, the configured terminal needs to receive a transport block on a carrier a, the CBG size on the carrier a is configured to be 2, and the number of control information resource sets (CORSET) in a PDCCH transmission opportunity on the carrier a is configured to be 3, the terminal is considered to receive the maximum number of PDCCHs in the PDCCH transmission opportunity on the carrier a to be 3, and the terminal generates HARQ-ACK information with 3 × 1 × 2-6 bits on the PDCCH detection opportunity on the carrier a. The corresponding 3 PDCCHs are transmitted within different sets, and as shown in fig. 3, the PDCCH order is determined according to the set ID, and PDCCH1 is transmitted in set0, PDCCH2 is transmitted in set1, and PDCCH3 is transmitted in set 2.

HARQ-ACK feedback information is generated for each PDCCH-scheduled PDSCH, and then the corresponding feedback information is concatenated according to the PDCCH order, as shown in fig. 4, to obtain 6 HARQ-ACK feedback bits in total, where bit 0 and bit 1 correspond to two CBGs of the PDCCH-scheduled PDSCH transmitted at CORSET0, bit 2 and bit 3 correspond to two CBGs of the PDCCH-scheduled PDSCH transmitted at CORSET1, and bit 4 and bit 5 correspond to two CBGs of the PDCCH-scheduled PDSCH transmitted at CORSET 2.

The second case,

Assuming that a base station configures a terminal to use a semi-static codebook scheme for feedback, the configured terminal needs to receive 2 transport blocks on a carrier a, the configured carrier a does not use HARQ-ACK feedback based on CBG, the configured terminal has a number of sets of 2 in a PDCCH transmission opportunity on the carrier a, and the number of search spaces in each set of sets is 2, and then the terminal considers that the maximum number of PDCCHs that the terminal can receive in a PDCCH transmission opportunity on the carrier a is 4, and then the terminal generates HARQ-ACK information with 4 x 2x 1-8 bits on a PDCCH detection opportunity on the carrier a. Corresponding 4 PDCCHs are transmitted within different search spaces, respectively, and as shown in fig. 5, the ordering of the PDCCHs is determined according to the sets ID and the search space order, PDCCH1 is transmitted in the first search space of sets 0, PDCCH2 is transmitted in the second search space of sets 0, PDCCH3 is transmitted in the first search space of sets 1, and PDCCH4 is transmitted in the second search space of sets 1, and assuming that the terminal does not detect that PDCCH is transmitted in the first search space of sets 1, the terminal still numbers PDCCH transmitted in the second search space of sets 1 as 4.

As shown in fig. 6, the terminal obtains 8 HARQ-ACK feedback bits, where bit 0 and bit 1 correspond to two Transport Blocks (TBs) of the PDSCH scheduled by the PDCCH in the first search space of the set0, bit 2 and bit 3 correspond to two TBs of the PDSCH scheduled by the PDCCH in the second search space of the set0, bit 4 and bit 5 correspond to two TBs of the PDSCH scheduled by the PDCCH in the first search space of the set1, and since the terminal does not detect the PDCCH in this search space, the terminal generates two placeholder bits NACK/DTX, and bit 6 and bit 7 correspond to two TBs of the PDSCH scheduled by the PDCCH in the second search space of the set 1.

Case three,

Assuming that a base station configures a terminal to use a semi-static codebook scheme for feedback, the configured terminal needs to receive 2 transport blocks on a carrier a, configures the carrier a without using HARQ-ACK feedback based on CBG, and configures the maximum number of PDCCHs that the terminal can receive in one PDCCH transmission opportunity on the carrier a to be 4, the terminal generates HARQ-ACK information with 2 × 1 × 4-8 bits for the one PDCCH detection opportunity on the carrier a, and the base station indicates, through 2 bits in DCI, the order of PDCCHs transmitted in the current PDCCH detection opportunity on the current carrier. As shown in fig. 7, a PDCCH transmitted in CORSET0 and having a smaller CCE index is numbered 00, a PDCCH transmitted in CORSET0 and having a larger CCE index is numbered 01, a PDCCH transmitted in CORSET1 and having a smaller CCE index is numbered 10, and a PDCCH transmitted in CORSET0 and having a larger CCE index is numbered 11.

Assuming that the terminal does not receive the PDCCH with the smaller CCE index in the set1, the terminal generates HARQ-ACK feedback information for the PDSCH scheduled by each received PDCCH, and then concatenates the corresponding feedback information according to the ordering of the PDCCHs to generate NACK/DTX for the positions where the PDCCH is not received, as shown in fig. 8, a total of 8 HARQ-ACK feedback bits are obtained, bit 0 and bit 1 corresponding to two TBs of the PDSCH scheduled by the PDCCH with the number 00, bit 2 and bit 3 corresponding to two TBs of the PDSCH scheduled by the PDCCH with the number 01, bit 4 and bit 5 corresponding to NACK/DTX, and bit 6 and bit 7 corresponding to two TBs of the PDSCH scheduled by the PDCCH with the number 11.

It should be noted that, in the embodiment of the present invention, since the base station and the terminal both use the same feedback codebook determination method, there is no problem of inconsistent understanding between the base station and the terminal.

It should be noted that, in the feedback codebook determining method according to the embodiment of the present invention, when determining the feedback codebook, a condition that more than one PDCCH for scheduling downlink data transmission of different time slots or different lengths in the same time slot is transmitted in one PDCCH detection opportunity is considered, so as to generate a correct feedback codebook, ensure system transmission performance, and ensure reliability of network communication.

As shown in fig. 9, an embodiment of the present invention provides a feedback codebook determining apparatus 90, including:

an obtaining module 91, configured to obtain the number of first PDCCHs transmitted in one PDCCH detection opportunity of one carrier;

a first determining module 92, configured to determine, according to the first PDCCH number, a length of target feedback information of one PDCCH detection opportunity of one carrier;

a second determining module 93, configured to determine feedback codebook information according to the length of the target feedback information.

Further, the obtaining module 91 is configured to perform one of the following manners:

acquiring a first PDCCH number predefined by a protocol;

determining a PDCCH detection opportunity period as a first PDCCH number;

Further, the first determining module 92 is configured to:

Further, the second determining module 93 includes:

Further, the feedback codebook determining apparatus further includes:

It should be noted that, the embodiment of the feedback codebook determining apparatus is a feedback codebook determining apparatus corresponding to the above method embodiments one to one, and all implementation manners in the above method embodiments are applicable to the embodiment of the feedback codebook determining apparatus, and the same technical effect can also be achieved.

As shown in fig. 10, an embodiment of the present invention further provides a feedback codebook determining apparatus 100, which includes a processor 101, a transceiver 102, a memory 103, and a computer program stored in the memory 103 and executable on the processor 101; the transceiver 102 is connected to the processor 101 and the memory 103 through a bus interface, wherein the processor 101 is configured to read a program in the memory and execute the following processes:

It should be noted that in fig. 10, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 101 and various circuits of memory represented by memory 103 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 102 may be a number of elements, including a transmitter and a transceiver, providing a means for communicating with various other apparatus over a transmission medium. For different terminals, the user interface 1010 may also be an interface capable of interfacing with a desired device, including but not limited to a keypad, display, speaker, microphone, joystick, etc. The processor 101 is responsible for managing the bus architecture and general processing, and the memory 103 may store data used by the processor 101 in performing operations.

Optionally, the processor, when executing the computer program, implements one of the following steps:

acquiring a first PDCCH number predefined by a protocol;

Specifically, when the first PDCCH amount is determined by the sum of PDCCH candidate sets corresponding to a search space required to perform HARQ-ACK feedback and configured in at least one control information resource set in one PDCCH detection opportunity of one carrier, the PDCCH corresponding to the search space required to perform HARQ-ACK feedback is scrambled by a cell radio network temporary identifier or a semi-persistent scheduling radio network temporary identifier.

determining a PDCCH detection opportunity period as a first PDCCH number;

Specifically, when the first PDCCH number is configured by the base station through high layer signaling, the first PDCCH number is an integer greater than or equal to 1 and less than or equal to 4.

Optionally, the processor, when executing the computer program, implements the following steps:

Optionally, in determining the ordering of the PDCCHs, the processor, when executing the computer program, implements one of the following:

The feedback codebook determining device determines the length of the target feedback information of one PDCCH detection opportunity of one carrier according to the number of the first PDCCHs transmitted in the PDCCH detection opportunity of the one carrier, and then determines the feedback codebook information according to the length of the target feedback information, so that a more accurate semi-static feedback codebook can be generated, the transmission performance of a system is ensured, and the reliability of network communication is improved.

An embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the feedback codebook determination method applied to the feedback codebook determination apparatus.

The Base Station may be a Base Transceiver Station (BTS) in Global System for Mobile communications (GSM) or Code Division Multiple Access (CDMA), a Base Station (NodeB, NB) in Wideband Code Division Multiple Access (WCDMA), an evolved Node B (evolved Node B, eNB or eNodeB) in LTE, a relay Station or an Access point, or a Base Station in a future 5G network, and the like, which is not limited herein.

While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims.

Claims

1. A method for determining a feedback codebook, comprising:

2. The method of claim 1, wherein the obtaining the first number of PDCCHs transmitted in one PDCCH detection opportunity of one carrier comprises one of the following methods:

acquiring a first PDCCH number predefined by a protocol;

3. The method of claim 2, wherein when the first PDCCH amount is determined by a sum of PDCCH candidate sets corresponding to a search space requiring HARQ-ACK feedback configured in at least one control information resource set in one PDCCH detection opportunity of one carrier, the PDCCH corresponding to the search space requiring HARQ-ACK feedback is scrambled by a cell radio network temporary identifier or a semi-persistent scheduling radio network temporary identifier.

4. The method of claim 2, wherein the determining the first PDCCH number according to the PDCCH detection opportunity period comprises one of:

determining a PDCCH detection opportunity period as a first PDCCH number;

5. The feedback codebook determination method of claim 2, wherein when the first PDCCH number is configured by a base station through higher layer signaling, the first PDCCH number is an integer greater than or equal to 1 and less than or equal to 4.

6. The method of claim 1, wherein the step of determining the length of the target feedback information of one PDCCH detection opportunity for one carrier according to the first PDCCH number comprises:

7. The method of claim 1, wherein the step of determining feedback codebook information according to the length of the target feedback information comprises:

8. The feedback codebook determination method of claim 7, wherein the determining the feedback information of each PDCCH in one PDCCH detection opportunity of one carrier comprises one of the following manners:

9. The feedback codebook determination method of claim 7, wherein the determination of the ordering of the PDCCHs comprises one of:

10. The feedback codebook determination method of claim 7, further comprising:

11. A feedback codebook determination apparatus comprising a memory, a processor, and a computer program stored on the memory and executable on the processor; wherein the processor implements the following steps when executing the computer program:

12. The feedback codebook determination device of claim 11, wherein the processor when executing the computer program performs one of the following steps:

acquiring a first PDCCH number predefined by a protocol;

13. The apparatus of claim 12, wherein when the first PDCCH amount is determined by a sum of PDCCH candidate sets corresponding to a search space requiring HARQ-ACK feedback configured in at least one control information resource set in one PDCCH detection opportunity of one carrier, the PDCCH corresponding to the search space requiring HARQ-ACK feedback is scrambled by a cell radio network temporary identifier or a semi-persistent scheduling radio network temporary identifier.

14. The feedback codebook determination device of claim 12, wherein the processor when executing the computer program performs one of the following steps:

determining a PDCCH detection opportunity period as a first PDCCH number;

15. The apparatus of claim 12, wherein the first PDCCH number is an integer greater than or equal to 1 and less than or equal to 4 when the first PDCCH number is configured by a base station through higher layer signaling.

16. The feedback codebook determination device of claim 11, wherein the processor when executing the computer program implements the following steps:

17. The feedback codebook determination device of claim 11, wherein the processor when executing the computer program implements the following steps:

18. The feedback codebook determination device of claim 17, wherein the processor when executing the computer program performs one of the following steps:

19. The feedback codebook determination device of claim 17, wherein in determining the ordering of the PDCCH, the processor when executing the computer program implements one of the following:

20. The feedback codebook determining apparatus of claim 17, wherein the processor when executing the computer program performs the steps of:

21. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the feedback codebook determination method as defined in any one of claims 1 to 10.

22. A feedback codebook determining apparatus, comprising:

23. The apparatus of claim 22, wherein the obtaining module is configured to perform one of the following:

acquiring a first PDCCH number predefined by a protocol;

24. The apparatus of claim 23, wherein when the first PDCCH amount is determined by a sum of PDCCH candidate sets corresponding to a search space requiring HARQ-ACK feedback configured in at least one control information resource set in one PDCCH detection opportunity of one carrier, the PDCCH corresponding to the search space requiring HARQ-ACK feedback is scrambled by a cell radio network temporary identifier or a semi-persistent scheduling radio network temporary identifier.

25. The apparatus of claim 23, wherein the determining the first PDCCH number according to the PDCCH detection opportunity period comprises one of:

determining a PDCCH detection opportunity period as a first PDCCH number;

26. The apparatus of claim 23, wherein the first PDCCH number is an integer greater than or equal to 1 and less than or equal to 4 when the first PDCCH number is configured by a base station through higher layer signaling.

27. The feedback codebook determination device of claim 22, wherein the first determination module is configured to:

28. The feedback codebook determining apparatus of claim 22, wherein the second determining module comprises:

29. The feedback codebook determination device of claim 28, wherein the first determination unit is configured to perform one of the following:

30. The apparatus of claim 28, wherein the ordering of the PDCCHs is determined in one of:

31. The feedback codebook determining apparatus of claim 28, further comprising: