CN112217620B

CN112217620B - Method, terminal and network equipment for determining hybrid automatic repeat request acknowledgement codebook

Info

Publication number: CN112217620B
Application number: CN201910631025.4A
Authority: CN
Inventors: 高雪娟
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2019-07-12
Filing date: 2019-07-12
Publication date: 2022-04-01
Anticipated expiration: 2039-07-12
Also published as: CN112217620A

Abstract

The invention provides a method, a terminal and network equipment for determining a hybrid automatic repeat request acknowledgement codebook, wherein the method comprises the following steps: when the HARQ-ACK is determined to be transmitted in the first time slot according to the feedback time sequence, determining a HARQ-ACK codebook in the first time slot according to the target time slot and the K1 set; the feedback timing is HARQ-ACK released by PDSCH transmitted in slot n or semi-persistent scheduling PDSCH, and is transmitted in slot n _ U, where n _ U is n + K + TA _ offset, the number of the target slot n _ U is n _ U-TA _ offset, K is one of the set K1, n _ U is the number of the first slot, K1 is the set of slot timing values representing the interval between the transmission slot of PDSCH and the transmission slot of the corresponding HARQ-ACK, and TA _ offset is a value related to TA configured by signaling or calculated in a predetermined manner.

Description

Method, terminal and network equipment for determining hybrid automatic repeat request acknowledgement codebook

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method, a terminal, and a network device for determining a hybrid automatic repeat request acknowledgement codebook.

Background

In a satellite communication system, considering that the cell diameter of the satellite communication system is very large (up to 1000km), the maximum Timing Advance (TA) value in the cell is far larger than the TA value of a New Radio (NR) cell, and can reach more than 3 ms. In the NR system, TA and processing delay are supported by selecting an appropriate feedback timing K1. However, K1 in NR can only support a time length of 0 to 15 slots, i.e. a maximum value is 15 slot intervals, but when 120kHz subcarriers are taken as an example in a satellite communication system, a 3ms TA requires a time length of 24 slots, which cannot be covered by the existing K1 value. For this reason, it is defined that, on the basis of not changing the existing value of K1, a new feedback timing sequence needs to be introduced to define the relationship between the transmission time slot of the PDSCH and the transmission time slot of the HARQ-ACK, so as to ensure that the position where the HARQ-ACK is transmitted does not collide with the downlink transmission after the TA advance is considered. Since determination of the HARQ-ACK codebook (codebook) in NR is directly related to feedback timing. Accordingly, there is no explicit method for how to determine the HARQ-ACK codebook (codebook) under the new feedback timing.

Disclosure of Invention

The invention aims to provide a method, a terminal and network equipment for determining a hybrid automatic repeat request acknowledgement codebook, which are used for solving the problem of how to determine the HARQ-ACK codebook in a satellite communication system.

In order to achieve the above object, the present invention provides a method for determining a harq-ack codebook, which is applied to a terminal and includes:

when determining that hybrid automatic repeat request acknowledgement (HARQ-ACK) is transmitted in a first time slot according to a feedback time sequence, determining a HARQ-ACK codebook in the first time slot according to a target time slot and a K1 set;

the feedback timing sequence is HARQ-ACK for releasing release of a PDSCH or a SPS PDSCH transmitted in a timeslot n, and is transmitted in a timeslot n _ U, where n _ U is n + K + TA _ offset, the number of the target timeslot n _ U' is n _ U-TA _ offset, K is one of a K1 set, n _ U is the number of the first timeslot, K1 is a set of timeslot timing values representing an interval between a transmission timeslot of the PDSCH and a corresponding transmission timeslot of the HARQ-ACK, and TA _ offset is a value related to timing advance TA configured by signaling or calculated according to a predetermined manner.

Wherein, the determining the HARQ-ACK codebook in the first time slot according to the target time slot and the K1 set includes:

under the condition that the HARQ-ACK codebook is a semi-static HARQ-ACK codebook, determining a candidate PDSCH opportunity set corresponding to each carrier according to the target time slot and a K1 set, wherein the candidate PDSCH opportunity set is a set of candidate PDSCH opportunities for carrying out HARQ-ACK feedback in one time slot;

and obtaining a HARQ-ACK codebook in the first time slot according to the candidate PDSCH opportunity set corresponding to each carrier.

Wherein, the determining the candidate PDSCH opportunity set corresponding to each carrier according to the target time slot and the K1 set includes at least one of the following methods:

the method comprises the following steps:

according to n _ U' -k_iObtaining each downlink time slot corresponding to the first time slot;

obtaining a candidate PDSCH opportunity set corresponding to each carrier according to each downlink time slot;

wherein k is_iBelongs to K1, i is 0,1, … … and T-1, wherein T is the number of elements in K1;

the method 2 comprises the following steps: according to n _ U' -k_i-S, obtaining each set of downlink timeslots corresponding to said first timeslot, each set of downlink timeslots comprising at least one downlink timeslot;

obtaining a candidate PDSCH opportunity set corresponding to each carrier according to each group of downlink time slots; where S is 0,1, … …, Krept-1, and Krept is the number of repeated transmissions of PDSCH, and when no repeated transmission is configured, Krept is 1, k_iBelongs to K1, i is 0,1, … … and T-1, and T is the number of elements in K1.

For the method 1, obtaining the candidate PDSCH opportunity set corresponding to each carrier according to each downlink timeslot includes:

determining each downlink time slot as a candidate PDSCH opportunity; or,

determining whether each downlink time slot contains an effective PDSCH time domain transmission position SLIV or not, and taking each downlink time slot containing the effective SLIV as a candidate PDSCH opportunity; or,

if not, determining each downlink time slot as a candidate PDSCH opportunity; if the support of receiving more than one PDSCH in one time slot, determining at least one SLIV group for each downlink time slot according to the SLIV overlapping rule in one time slot, wherein each SLIV group is used as a candidate PDSCH opportunity; or,

determining whether each downlink time slot contains an effective PDSCH time domain transmission position SLIV, if the time slot does not support receiving more than one PDSCH, using each downlink time slot containing the effective SLIV as a candidate PDSCH opportunity, and if the time slot supports receiving more than one PDSCH, determining at least one SLIV group for each downlink time slot containing the effective SLIV according to an overlapping rule of the effective SLIV in one time slot, wherein each SLIV group is used as a candidate PDSCH opportunity;

for the method 2, obtaining the candidate PDSCH opportunity set corresponding to each carrier according to each group of downlink timeslots includes:

for each group of downlink time slots, determining whether one SLIV in the SLIV set is valid in each downlink time slot in each group of downlink time slots, and when the SLIV set contains valid SLIVs, determining each group of downlink time slots as a candidate PDSCH opportunity; or,

for each group of downlink time slots, determining whether one SLIV in the SLIV set is valid in each downlink time slot in each group of downlink time slots, when the SLIV set contains valid SLIVs, if the SLIV set does not support receiving more than one PDSCH in one time slot, determining each group of downlink time slots as a candidate PDSCH opportunity, and if the SLIV set supports receiving more than one PDSCH in one time slot, determining at least one SLIV group for the valid SLIVs according to an overlapping rule of the SLIVs, wherein each SLIV group is used as a candidate PDSCH opportunity.

Wherein, for the method 1, determining whether the SLIV is valid comprises:

when a time domain symbol corresponding to the SLIV is overlapped with at least one uplink symbol in a corresponding downlink time slot, determining the SLIV as an invalid SLIV, otherwise, determining the SLIV as an valid SLIV;

for the method 2, determining whether the SLIV is valid comprises:

when the time domain symbol corresponding to the SLIV overlaps with at least one uplink symbol in any one downlink time slot in the corresponding group of downlink time slots, determining the SLIV as an invalid SLIV, otherwise, determining the SLIV as an valid SLIV.

under the condition that the HARQ-ACK codebook is a dynamic HARQ-ACK codebook, determining a PDCCH detection opportunity set corresponding to each carrier according to a target time slot, a K1 set and a K0 set, wherein K0 is a set of time slot timing values representing intervals between transmission time slots of a PDCCH and transmission time slots of a PDSCH scheduled by the PDCCH;

and detecting the PDCCH in the full set of the PDCCH detection opportunity set corresponding to each carrier, and determining the HARQ-ACK codebook in the first time slot according to the detected downlink assignment index DAI value in the PDCCH.

Determining a PDCCH detection opportunity set corresponding to each carrier according to the target time slot, the K1 set and the K0 set, wherein the determining comprises the following steps:

and under the condition that the repeated transmission times Krept of the PDSCH are configured, determining a PDCCH detection opportunity set corresponding to each carrier according to the target time slot, the K1 set, the K0 set and the repeated transmission times.

And numbering the uplink time slots according to a mode of aligning with the downlink time slots.

In order to achieve the above object, an embodiment of the present invention further provides a method for determining a hybrid automatic repeat request acknowledgement codebook, which is applied to a network device, and includes:

when determining that hybrid automatic repeat request acknowledgement (HARQ-ACK) is received in a first time slot according to a feedback time sequence, determining a HARQ-ACK codebook in the first time slot according to a target time slot and a K1 set;

the feedback timing is HARQ-ACK for releasing release of a PDSCH (physical downlink shared channel) or a SPS PDSCH (semi persistent scheduling SPS) transmitted in a timeslot n, and is transmitted in a timeslot n _ U, where n _ U is n + K + TA _ offset, the number of the target timeslot n _ U' is n _ U-TA _ offset, K is one of a set of K1, n _ U is the number of the first timeslot, K1 is a set of timeslot timing values representing an interval between a transmission timeslot of the PDSCH and a corresponding transmission timeslot of the HARQ-ACK, and TA _ offset is a value related to a timing advance TA configured by signaling or calculated according to a predetermined manner.

the method comprises the following steps:

determining each downlink time slot as a candidate PDSCH opportunity; or,

Wherein, for the method 1, determining whether the SLIV is valid comprises:

for the method 2, determining whether the SLIV is valid comprises:

In order to achieve the above object, an embodiment of the present invention further provides a terminal, including: a transceiver, a memory, a processor, and a program stored on the memory and executable on the processor, the processor implementing the steps when executing the program of:

Wherein the step of the processor executing the procedure of determining the HARQ-ACK codebook in the first slot according to the target slot and the set of K1 comprises:

Wherein the step of the processor executing the procedure of determining the candidate PDSCH opportunity set corresponding to each carrier according to the target time slot and the K1 set includes the step of at least one of the following methods:

the method comprises the following steps:

the method 2 comprises the following steps: according to n _ U' -k_i-S, deriving a correspondence to said first time slotEach group of downlink time slots comprises at least one downlink time slot;

Wherein, the step of the processor executing the program for obtaining the candidate PDSCH opportunity set corresponding to each carrier according to each downlink timeslot includes:

determining each downlink time slot as a candidate PDSCH opportunity; or,

the step of the processor executing the program for obtaining the candidate PDSCH opportunity set corresponding to each carrier according to each group of downlink timeslots includes:

Wherein, for the method 1, the processor determining whether the SLIV is valid comprises:

for the method 2, the processor determining whether the SLIV is valid, comprising:

Wherein the step of the processor executing the procedure of determining the PDCCH detection opportunity set corresponding to each carrier according to the target time slot, the K1 set and the K0 set comprises:

In order to achieve the above object, an embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, implements the steps of the method for determining a hybrid automatic repeat request acknowledgement codebook as described above.

In order to achieve the above object, an embodiment of the present invention further provides a network device, including: a transceiver, a memory, a processor, and a program stored on the memory and executable on the processor, the processor implementing the steps when executing the program of:

the method comprises the following steps:

determining each downlink time slot as a candidate PDSCH opportunity; or,

In order to achieve the above object, an embodiment of the present invention further provides a terminal, including:

a first determining module, configured to determine, when it is determined according to a feedback timing sequence that a hybrid automatic repeat request acknowledgement HARQ-ACK is transmitted in a first time slot, a HARQ-ACK codebook in the first time slot according to a target time slot and a K1 set;

In order to achieve the above object, an embodiment of the present invention further provides a network device, including:

a second determining module, configured to determine, when it is determined according to the feedback timing sequence that a hybrid automatic repeat request acknowledgement HARQ-ACK is received in a first time slot, a HARQ-ACK codebook in the first time slot according to a target time slot and a K1 set;

The embodiment of the invention has the following beneficial effects:

according to the technical scheme of the embodiment of the invention, when the hybrid automatic repeat request acknowledgement HARQ-ACK is determined to be transmitted in the first time slot according to the feedback time sequence, the HARQ-ACK codebook in the first time slot is determined according to the target time slot n _ U' -n _ U-TA _ offset and the K1 set, so that the HARQ-ACK codebook can be ensured to correctly contain the PDSCH candidate position which needs to be subjected to HARQ-ACK feedback in the first time slot, and the normal transmission of the HARQ-ACK is ensured.

Drawings

FIG. 1 is a schematic diagram of satellite communications;

fig. 2 is a schematic diagram of the transmission delay between a terminal and a gateway station;

FIG. 3 is a schematic diagram of the differences in user link transmission delays in a satellite cell;

FIG. 4 is a timing diagram of HARQ-ACK feedback in a satellite communication system;

FIG. 5 is a flowchart illustrating a method for determining a HARQ-ACK codebook according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of elements in a SLIV set;

FIG. 7 is a second flowchart illustrating a method for determining a HARQ-ACK codebook according to an embodiment of the present invention;

fig. 8 is a schematic diagram of uplink and downlink timing of a terminal and a network device in the embodiment of the present invention;

fig. 9 is a block diagram of a terminal according to an embodiment of the present invention;

fig. 10 is a block diagram of a terminal according to an embodiment of the present invention;

FIG. 11 is a block diagram of a network device according to an embodiment of the present invention;

fig. 12 is a block diagram of a network device according to an embodiment of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings.

In order that those skilled in the art will be better able to understand the embodiments of the present invention, the following description is first made.

In satellite communication, two working modes exist, one is a bent pipe mode, a satellite only transparently forwards signals without any processing, and a terminal communicates with a gateway station, and the other is a regeneration communication mode, at the moment, the satellite can detect information of received signals, process and forward the information, complete the functions of a base station, and connect the terminal and the gateway station. In satellite communications, the connection between the end user and the satellite is referred to as the user link and the connection between the satellite and the gateway station is the feeder link. Two communication mode diagrams are listed in fig. 1.

For the bent-pipe communication, the terminal and the gateway station experience the transmission delay T1 of the feeder link and the transmission delay T2 of the user link when performing data communication, and the Round Trip delay (RTT) of the transmission is 2 × (T1+ T2), i.e., the uplink synchronization delay is 2 × (T1+ T2), as shown in fig. 2. A user link (Service link) refers to a link connection between the satellite and the communication terminal, and a Feeder link (Feeder link) refers to a link connection between the gateway and the satellite. In the regenerative communication mode, the terminal and satellite transmission delays comprise the user link transmission delay T2, with an RTT of 2 × T2. 2(T1+ T2) is a value of 20-40 ms magnitude, and is larger. At 120kHz subcarrier spacing, at least 160 slot lengths are required.

Taking bent-pipe communication as an example, uplink synchronization between a terminal and a gateway station includes two parts, a first part: the terminal can receive GPS signals and perform accurate positioning, and according to the fact that satellites are in the same beam, the time 2(T1+ T2) which is twice as long as the feeder link T2 is two times of the minimum user link time delay T1 (the common shortest distance between the beamformed small-area satellites, for example, the time delay corresponding to d1 in FIG. 3 is T1) and the feeder link T2 in all users; a second part: in the cell covered by the same beam, the time delay (2 × T3) corresponding to the user link propagation path of a certain terminal and the minimum user link propagation path difference d3 is shown in fig. 3. I.e. the total uplink timing offset between terminal to gateway station is 2(T1+ T2+ T3). Wherein, considering a maximum diameter of a satellite cell of around 1000km, the maximum value of 2 × T3 is about 3.3ms, and at least 24 time slots are required at 120kHz subcarrier spacing. Different terminals have different actual distances from the reference point, and the corresponding T3 values are different;

in the NR system, the HARQ-ACK feedback timing is defined as: and performing HARQ-ACK feedback on the PDSCH in the slot n + K1, wherein K1 represents the number of slots from the slot where the PDSCH is located to the slot where the PUCCH is located, and K1 can be an integer from 0 to 15, and the interval of the maximum 15 slots can be indicated by taking the slot as a unit. Configuring a maximum of 8K 1 values for a terminal through a high-level signaling, if only configuring 1K 1 value, the feedback time sequence is fixed, and if the configuration exceeds 1K 1 value, the feedback time sequence indication domain from PDSCH to HARQ-ACK in a downlink control information DCI format used by a physical downlink control channel PDCCH for scheduling PDSCH dynamically indicates the K1. When the value of K1 is selected, it is necessary to ensure that the processing delay of PDSCH is satisfied between the end position of PDSCH and the start position of PUCCH, where the start position of PUCCH is the start position of TA, and therefore, support for different processing delays and TAs is achieved by reasonably selecting the value of K1 in NR. In the NR system, in the HARQ-ACK transmission slot, HARQ-ACK codebook, that is, a HARQ-ACK sequence including feedback information of one or more PDSCHs transmitted in one slot, is determined based on the K1 set.

In a satellite communication system, if one wants to reuse K1 in NR to define the timing between PDSCH and PUCCH transmitting its HARQ-ACK, it is clear that the current NR defined K1 value cannot support a larger TA in the satellite communication system. A simple implementation is to define the feedback timing by n + K1+ TA _ offset, i.e. to introduce an offset value related to TA to support a larger TA that cannot be supported by K1, and assuming that the uplink and downlink timings at the terminal side are aligned at this time, the terminal sends the timing ahead by TA slots on the basis of the determined feedback timing, i.e. the actual sending time is different from the feedback slot determined according to the scheduling information, as shown in fig. 4. In this manner, TA _ offset has two explanations, one is a TA value covering all uplink timing deviations between the terminal and the gateway station, i.e., the absolute TA value is 2 × (T1+ T2+ T3), and the terminal transmission slot determined according to this TA _ offset can coincide with the slot number maintained by the gateway station when it arrives at the gateway station, but this TA _ offset value is very large. Another way is that TA _ offset corresponds to the uplink timing offset of the terminal only from the reference point in a cell corresponding to the satellite beam, i.e. the relative TA value is 2 × T3. At this time, the number of the uplink slot determined according to this TA _ offset is equal to the number of the slot maintained by the gateway station by 2 × (T1+ T2) times. In fig. 4, the gNB may be understood as a gateway station, and is an absolute TA case, where 2 × TD is 2 × (T1+ T2+ T3), or the reference point of the terrestrial cell, is the relative TA case, where 2 TD is 2T 3, in the manner shown in fig. 4, the PDSCH transmitted in the slot T0+ T _ D + K0 has HARQ-ACK transmission slot T0+2 × T _ D + K0+ K1 determined according to the timing relationship, and the base station receives the PUCCH in this slot, on the other hand, on the terminal side, in consideration of TA, the PUCCH in the slot T0+2 × T _ D + K0+ K1 is actually the slot T0+ T _ D + K0+ K1 at the real transmission time advanced by TA transmission, and after the uplink transmission delay of T _ D, the time of arrival at the base station side is exactly aligned with the expected receiving time T0+2 × T _ D + K0+ K1 of the base station, thereby ensuring that the base station can correctly receive the HARQ-ACK.

In a satellite communication system, a new timing relationship is that, assuming that there is no TA deviation between the numbers of the downlink timeslot and the uplink timeslot at the terminal side, the feedback timeslot determined according to the n + K1+ TA _ offset mode needs to be sent in advance for the TA time, so as to determine that the actually sent timeslot number is n + K1, that is, the timeslot determined by the feedback timing is different from the actual transmission timeslot, and at this time, there is no explicit method for how to determine the HARQ-ACK codebook.

An embodiment of the present invention provides a method for determining a hybrid automatic repeat request acknowledgement codebook, which is applied to a terminal, and as shown in fig. 5, the method for determining the hybrid automatic repeat request acknowledgement codebook includes:

step 501: when determining that hybrid automatic repeat request acknowledgement (HARQ-ACK) is transmitted in a first time slot according to a feedback time sequence, determining a HARQ-ACK codebook in the first time slot according to a target time slot and a K1 set;

The HARQ-ACK transmitted in the first time slot is the HARQ-ACK transmitted by the PDSCH in the time slot n or the HARQ-ACK released by the SPS PDSCH transmitted in the second time slot.

The K1 set is a set including at least one integer value greater than or equal to 0, the elements in the K1 set are in units of a first time unit, and the TA _ offset is in units of a second time unit. The first time unit and the second time unit are the same or different. The first time unit or the second time unit may be specifically an a number of subframes, slots, or sub-slots (sub-slots), where a micro-slot is a predefined or configured time unit of a fixed length, such as B symbols (OFDM symbols).

In the embodiment of the present invention, it is assumed that the number of the uplink timeslot is numbered in a manner aligned with the downlink timeslot (that is, it is assumed that the uplink timeslot n is aligned with the boundary of the downlink timeslot n when the uplink and downlink subcarrier intervals are the same, and it is not necessary to advance the TA to define the uplink timeslot n), and in actual transmission, the uplink timeslot determined according to the feedback timing sequence is not the actually transmitted timeslot, and the actually transmitted timeslot needs to be transmitted in advance of the TA time on the basis of the uplink timeslot.

Further, the determining the HARQ-ACK codebook in the first slot according to the target slot and the K1 set includes:

Here, according to the candidate PDSCH opportunity set corresponding to each carrier, an HARQ-ACK codebook corresponding to each carrier is obtained, and the HARQ-ACK codebooks corresponding to each carrier are concatenated according to a first preset permutation order, so as to obtain an HARQ-ACK codebook in the first time slot. The first preset arranging order may specifically be an arranging order from small to large according to carrier coding.

Specifically, the determining the candidate PDSCH opportunity set corresponding to each carrier according to the target time slot and the K1 set includes at least one of the following methods:

the method comprises the following steps:

wherein k is_iBelongs to K1, i is 0,1, … … and T-1, and T is the number of elements in K1.

In the method 1, for the ith k_iAccording to n _ U' -k_iAnd obtaining a downlink time slot corresponding to the first time slot, thereby determining that the T downlink time slots correspond to the time slot n _ U', and then obtaining a candidate PDSCH opportunity set corresponding to each carrier according to PDSCH transmission opportunities in the T downlink time slots.

Further, for the method 1, obtaining a candidate PDSCH opportunity set corresponding to each carrier according to each downlink timeslot includes:

determining each downlink time slot as a candidate PDSCH opportunity; or,

determining whether each downlink time slot contains an effective PDSCH time domain transmission position SLIV, if the time slot does not support receiving more than one PDSCH, using each downlink time slot containing the effective SLIV as a candidate PDSCH opportunity, and if the time slot supports receiving more than one PDSCH, determining at least one SLIV group for each downlink time slot containing the effective SLIV according to an overlapping rule of the effective SLIV in one time slot, wherein each SLIV group is used as a candidate PDSCH opportunity.

Further, for the method 1 above, determining whether the SLIV is valid comprises:

and when the time domain symbol corresponding to the SLIV is overlapped with at least one uplink symbol in the corresponding downlink time slot, determining the SLIV as an invalid SLIV, otherwise, determining the SLIV as an valid SLIV.

Specifically, if it is always assumed in the satellite communication system that at most one PDSCH transmission exists in each downlink time slot (that is, if each DL time slot corresponds to multiple SLIVs, the multiple SLIVs are overlapped, and only one SLIV exists that is selected for PDSCH transmission, so that the SLIVs correspond to the same candidate PDSCH opportunity, each downlink time slot may be directly used as a candidate PDSCH opportunity, and it is determined that T candidate PDSCH opportunities constitute the candidate PDSCH opportunity set M of the carrier c_A,c(ii) a If a satellite communication system can support receiving more than one PDSCH transmission in a time slot, the ability to support receiving more than one PDSCH transmission may be configurable, and M may be determined based on whether this ability is configured_A,cIf not, that is, at most one PDSCH in one time slot, each downlink time slot may be directly used as a candidate PDSCH opportunity, and the candidate PDSCH opportunity set M in which T candidate PDSCH opportunities constitute the carrier c is determined_A,cIf supported, this means that there may be multiple candidate PDSCH opportunities in a slot, which can be determined according to the distribution of SLIVs in a slot, i.e. a slotMultiple SLIVs in the corresponding candidate SLIV set may or may not overlap in time domain, and the SLIVs are grouped according to an overlap rule to obtain multiple non-overlapping candidate PDSCH opportunities as candidate PDSCH opportunities corresponding to one time slot, so that the T time slots determine a candidate PDSCH opportunity set M in which more than T candidate PDSCH opportunities constitute a carrier c_A,c(ii) a In addition, whether an SLIV is valid or not can be further judged by whether the SLIV overlaps with the uplink symbol, for an invalid SLIV, the SLIV is removed from the SLIV set, and only the valid SLIV is reserved for determining the candidate PDSCH opportunity according to the above manner.

Wherein, the SLIV overlap rule is:

the method comprises the following steps: determining each element (SLIV) in a PDSCH time domain resource allocation table as a set R;

step two: finding the element X with the earliest end position in R;

step three: finding all the elements (containing element X) in R whose starting symbol is earlier than the ending position, which elements overlap in the time domain and therefore cannot be scheduled at the same time;

step four: the elements obtained in the first step and the second step correspond to a PDSCH transmission opportunity, the elements obtained in the first step and the second step are removed from the R in the set, and the operation returns to the second step; until R no longer contains any elements.

Specifically, as shown in fig. 6, it is assumed that the SLIV set includes 5 elements a to E, where the element a corresponds to a starting symbol 0 and has a length of 10 symbols; element B corresponds to the starting symbol 3, length 2 symbols; element C corresponds to the starting symbol 4, length 8 symbols; element D corresponds to a starting symbol of 10, 4 symbols in length; element E corresponds to a starting symbol of 10, length 2 symbols. The method comprises the steps of firstly finding an element B with the earliest end position, finding out elements of the element B with the start symbol earlier than the earliest end position in the rest elements, wherein the elements comprise the elements A/B/C, so that only one PDSCH can be scheduled in the elements A/B/C and corresponds to a candidate PDSCH opportunity, the element E with the earliest end position in the rest elements is the element D, and the element E with the start symbol earlier than the element E is so that only one PDSCH can be scheduled in the element D/E and corresponds to a candidate PDSCH opportunity. In this example, the maximum number of receivable PDSCHs for the UE in one slot is 2.

The method 2 comprises the following steps:

according to n _ U' -k_i-S, obtaining each set of downlink timeslots corresponding to said first timeslot, each set of downlink timeslots comprising at least one downlink timeslot;

In this method 2, for the ith k_iAccording to n _ U' -k_i-S, where S has a Krept value, to obtain a set of downlink timeslots corresponding to the first timeslot, where the set of downlink timeslots is a set of downlink timeslots used to transmit PDSCH of Krept times of repeated transmission, thereby determining that T sets of such downlink timeslots correspond to the first timeslot, and then obtaining a set of candidate PDSCH opportunities corresponding to each carrier according to PDSCH transmission opportunities in the T sets of downlink timeslots.

Further, for the method 2 above, determining whether the SLIV is valid comprises:

and when the time domain symbol corresponding to the SLIV overlaps with at least one uplink symbol in any one downlink time slot in the corresponding group of downlink time slots, determining the SLIV as an invalid SLIV, otherwise (the SLIV does not overlap with the uplink symbol in each downlink time slot in the corresponding group of downlink time slots), determining the SLIV as an valid SLIV.

Specifically, if it is always assumed in the satellite communication system that at most one PDSCH transmission exists in each downlink time slot (that is, if multiple SLIVs are corresponding to each DL time slot, the multiple SLIVs are overlapped, and only one SLIV is selected for PDSCH transmission, so that the SLIVs correspond to the same candidate PDSCH opportunity), each group of downlink time slots may be directly used as a candidate PDSCH opportunity, and it is determined that T candidate PDSCH opportunities constitute the candidate PDSCH opportunity set M of the carrier c_A,c(ii) a If a satellite communication system can support receiving more than one PDSCH transmission in a time slot, the ability to support receiving more than one PDSCH transmission may be configurable, and M may be determined based on whether this ability is configured_A,cIf not, that is, at most one PDSCH in one time slot, the set of downlink time slots may be directly used as a candidate PDSCH opportunity, and the candidate PDSCH opportunity set M in which T candidate PDSCH opportunities constitute the carrier c is determined_A,cIf the candidate PDSCH opportunities are supported, the candidate PDSCH opportunities may exist in one slot, and the opportunities may be determined according to the distribution of SLIVs in one slot, that is, multiple SLIVs in the candidate SLIV set corresponding to one slot may overlap in the time domain or may not overlap, and the SLIVs are grouped according to an overlap rule (the same as above), so that multiple non-overlapping candidate PDSCH opportunities may be obtained as candidate PDSCH opportunities corresponding to a group of slots, and thus T groups of slots may determine that more than T candidate PDSCH opportunities constitute the candidate PDSCH opportunity set M of the carrier c_A,c(ii) a In addition, whether an SLIV is valid or not can be further judged by whether the SLIV overlaps with the uplink symbol, for an invalid SLIV, the SLIV is removed from the SLIV set, and only the valid SLIV is reserved for determining the candidate PDSCH opportunity according to the above manner.

If there are multiple carriers, each carrier determines M as described above_A,cIs aggregated and based on M_A,cAnd (4) determining the HARQ-ACK codebook of the carrier wave in a set, and cascading the HARQ-ACK codebooks of the plurality of carrier waves from small to large according to the carrier wave numbers to obtain the final HARQ-ACK codebook.

And under the condition that a plurality of carriers exist, forming a final PDCCH detection opportunity set by the PDCCH detection opportunity set corresponding to each carrier according to a second preset arrangement sequence, detecting the PDCCH in the final PDCCH detection opportunity set, and determining the HARQ-ACK codebook in the first time slot according to the detected downlink allocation index DAI value in the PDCCH. The second preset arrangement order may be an arrangement order of a time domain first and a frequency domain second.

determining a PDCCH detection opportunity corresponding to each downlink time slot according to a K0 set;

determining a PDCCH detection opportunity set corresponding to each carrier according to the PDCCH detection opportunity set corresponding to each downlink time slot;

wherein each of the downlinksThe PDCCH detection opportunity corresponding to the time slot is that the time slot number is n _ U' -k_i-k_0,jPDCCH detection opportunity in the time slot of (1), k_iBelongs to K1, i is 0,1, … … and T-1, T is the number of elements in K1, K is_0,jBelongs to a K0 set, j is 0,1, … and P-1, and P is the number of elements in the K0 set.

Further, determining a PDCCH detection opportunity corresponding to each downlink timeslot according to the K0 set includes:

according to the K0 set, determining the time slot n _ U' -K of the PDCCH detection opportunity corresponding to each downlink time slot_i-k_0,j；

Numbering the time slots as n _ U' -k_i-k_0,jThe PDCCH detection opportunity in the time slot is determined as the PDCCH detection opportunity corresponding to the downlink time slot.

determining whether each downlink time slot is an effective time slot;

and when the downlink time slot is an effective time slot, determining a PDCCH detection opportunity corresponding to the downlink time slot according to a K0 set.

Here, for an active slot in each of the downlink slots, a corresponding PDCCH detection opportunity is determined based on the K0 set, that is, a corresponding PDCCH detection opportunity is not determined based on the K0 set for an inactive slot.

Wherein, determining whether each downlink timeslot is an active timeslot includes:

determining whether the SLIV in the downlink time slot is an effective SLIV;

and if all SLIVs in the downlink time slot are invalid SLIVs, determining the downlink time slot as an invalid time slot, otherwise, determining the downlink time slot as an effective downlink time slot.

Further, determining a PDCCH detection opportunity set corresponding to each carrier according to the target timeslot, the K1 set, and the K0 set, including:

In the specific embodiment of the present invention, if the number of repeated transmissions Krept of the PDSCH is configured, the PDCCH detection opportunity set corresponding to each carrier needs to be determined according to the target timeslot, the K1 set, the K0 set, and the number of repeated transmissions.

In particular, according to n _ U' -k as described above_iDetermining PDCCH detection opportunities for each k_iDetermining the first time slot n _ U- (k) of the PDSCH repeated transmission time slots according to the repeated transmission times_i+ TA _ offset) - (Krept-1), n _ U- (K) is determined based on the K0 set_iTime slot n _ U- (k) where PDCCH detection opportunity corresponding to + TA _ offset) - (Krept-1) is located_i+TA_offset)-(Krept-1)-k_0,j(ii) a Will time slot n _ U- (k)_i+TA_offset)-(Krept-1)-k_0,jThe PDCCH detection opportunity in (b) is also determined as the PDCCH detection opportunity corresponding to the carrier.

Further, after determining the HARQ-ACK codebook in the first slot according to the target slot and the K1 set, the method further includes:

transmitting the HARQ-ACK codebook in a slot n _ U-TA _ offset; and numbering the uplink time slots according to a mode of aligning with the downlink time slots.

The numbering of the uplink time slot is numbered according to a mode of aligning with the downlink time slot, namely, the boundary of the uplink time slot n and the downlink time slot n is aligned on the assumption that the intervals of uplink and downlink subcarriers are the same, and TA (timing advance) is not needed; in this way, in the feedback timeslot determined according to the feedback timeslot, the ue needs to advance the TA time to transmit, that is, the timeslot number determined by the terminal according to the feedback timing is different from the timeslot number actually transmitted, and the difference therebetween is the timeslot corresponding to the TA time.

According to the method for determining the hybrid automatic repeat request acknowledgement codebook, when the hybrid automatic repeat request acknowledgement HARQ-ACK is determined to be transmitted in the first time slot according to the feedback time sequence, the HARQ-ACK codebook in the first time slot is determined according to the target time slot n _ U' -n _ U-TA _ offset and the K1 set, so that the HARQ-ACK codebook can be ensured to correctly contain the PDSCH candidate position corresponding to the HARQ-ACK feedback needing to be performed in the first time slot, and the normal transmission of the HARQ-ACK is ensured.

An embodiment of the present invention further provides a method for determining a hybrid automatic repeat request acknowledgement codebook, which is applied to a network device, and as shown in fig. 7, the method for determining the hybrid automatic repeat request acknowledgement codebook includes:

step 701: when determining that hybrid automatic repeat request acknowledgement (HARQ-ACK) is received in a first time slot according to a feedback time sequence, determining a HARQ-ACK codebook in the first time slot according to a target time slot and a K1 set;

the method comprises the following steps:

wherein, ki belongs to K1, i is 0,1, … …, T-1, T is the number of elements in K1.

determining each downlink time slot as a candidate PDSCH opportunity; or,

Specifically, if it is always assumed in the satellite communication system that at most one PDSCH transmission exists in each downlink time slot (that is, if each DL time slot corresponds to multiple SLIVs, the multiple SLIVs are overlapped, and only one SLIV exists that is selected for PDSCH transmission, so that the SLIVs correspond to the same candidate PDSCH opportunity, each downlink time slot may be directly used as a candidate PDSCH opportunity, and it is determined that T candidate PDSCH opportunities constitute the candidate PDSCH opportunity set M of the carrier c_A,c(ii) a If a satellite communication system can support receiving more than one PDSCH transmission in a time slot, the ability to support receiving more than one PDSCH transmission may be configurable, and M may be determined based on whether this ability is configured_A,cIf not, that is, at most one PDSCH in one time slot, each downlink time slot may be directly used as a candidate PDSCH opportunity, and the candidate PDSCH opportunity set M in which T candidate PDSCH opportunities constitute the carrier c is determined_A,cIf the candidate PDSCH opportunity set M is supported, the candidate PDSCH opportunity set M may be determined to be a candidate PDSCH opportunity set M having a carrier c formed by more than T candidate PDSCH opportunities, where the candidate PDSCH opportunities may be determined according to the distribution of SLIVs in a slot, that is, multiple SLIVs in the candidate SLIV set corresponding to a slot may overlap in the time domain or may not overlap, and the SLIVs are grouped according to an overlap rule to obtain multiple non-overlapping candidate PDSCH opportunities as candidate PDSCH opportunities corresponding to a slot, and thus the T slots determine that the candidate PDSCH opportunity set M may form a carrier c by more than T candidate PDSCH opportunities_A,c(ii) a In addition, whether an SLIV is valid or not can be further judged by whether the SLIV overlaps with the uplink symbol, for an invalid SLIV, the SLIV is removed from the SLIV set, and only the valid SLIV is reserved for determining the candidate PDSCH opportunity according to the above manner.

Wherein, the SLIV overlap rule is:

step two: finding the element X with the earliest end position in R;

The method 2 comprises the following steps:

In this method 2, for the ith k_iAccording to n _ U' -k_i-S, where S has a value of Krept, resulting in a set of downlink timeslots corresponding to the first timeslot, the set of downlink timeslots being a set of downlink timeslots used for transmitting a PDSCH transmitted for Krept repetitions, thereby determining T such sets of downlink timeslots to correspond to the first timeslotAnd then obtaining a candidate PDSCH opportunity set corresponding to each carrier according to the PDSCH transmission opportunities in the T groups of downlink time slots.

Specifically, if it is always assumed in the satellite communication system that at most one PDSCH transmission exists in each downlink time slot (that is, if multiple SLIVs are corresponding to each DL time slot, the multiple SLIVs are overlapped, and only one SLIV is selected for PDSCH transmission, so that the SLIVs correspond to the same candidate PDSCH opportunity), each group of downlink time slots may be directly used as a candidate PDSCH opportunity, and it is determined that T candidate PDSCH opportunities constitute the candidate PDSCH opportunity set M of the carrier c_A,c(ii) a If more than one reception in a time slot can be supported in a satellite communication systemA number of PDSCH transmissions, the ability to support receiving more than one PDSCH transmission may be configurable, and M may be determined based on whether this ability is configured_A,cIf not, that is, at most one PDSCH in one time slot, the set of downlink time slots may be directly used as a candidate PDSCH opportunity, and the candidate PDSCH opportunity set M in which T candidate PDSCH opportunities constitute the carrier c is determined_A,cIf the candidate PDSCH opportunities are supported, the candidate PDSCH opportunities may exist in one slot, and the opportunities may be determined according to the distribution of SLIVs in one slot, that is, multiple SLIVs in the candidate SLIV set corresponding to one slot may overlap in the time domain or may not overlap, and the SLIVs are grouped according to an overlap rule (the same as above), so that multiple non-overlapping candidate PDSCH opportunities may be obtained as candidate PDSCH opportunities corresponding to a group of slots, and thus T groups of slots may determine that more than T candidate PDSCH opportunities constitute the candidate PDSCH opportunity set M of the carrier c_A,c(ii) a In addition, whether an SLIV is valid or not can be further judged by whether the SLIV overlaps with the uplink symbol, for an invalid SLIV, the SLIV is removed from the SLIV set, and only the valid SLIV is reserved for determining the candidate PDSCH opportunity according to the above manner.

wherein, the PDCCH detection opportunity corresponding to each downlink timeslot is timeslot number n _ U' -k_i-k_0,jPDCCH detection opportunity in the time slot of (1), k_iBelongs to K1, i is 0,1, … … and T-1, T is the number of elements in K1, K is_0,jBelongs to a K0 set, j is 0,1, … and P-1, and P is the number of elements in the K0 set.

determining whether each downlink time slot is an effective time slot;

determining whether the SLIV in the downlink time slot is an effective SLIV;

receiving the HARQ-ACK codebook in a slot n _ U _ gNB;

wherein in a case that TA _ offset includes the first transmission delay and the second transmission delay, n _ U _ gNB is equal to n _ U;

in the case where TA _ offset includes only the first transmission delay, n _ U _ gNB is n _ U + TA _ offset 2; the first transmission delay is a transmission delay corresponding to a transmission path from the terminal to a cell reference point, the TA _ offset2 is the second transmission delay, and the second transmission delay is a transmission delay corresponding to a transmission path from the cell reference point to a gateway station through a satellite.

The following describes an implementation process of the HARQ-ACK codebook determination method according to a specific embodiment.

Example 1: semi-static HARQ-ACK codebook. Assuming that 120kHz carrier spacing, TA _ offset is 16, that is, 16 slots, and the set of K1 is {1,2,3}, HARQ-ACK feedback needs to be performed in slot n + K + TA _ offset according to the PDSCH transmitted in slot n, assuming that K corresponding to the PDSCH in slot n is 3, K corresponding to the PDSCH in slot n is 2, and K corresponding to the PDSCH in slot n is 1, HARQ-ACK feedback is performed in slot n is 19 according to feedback timing for all three PDSCHs, and considering that slot 19 performs advance transmission of 16 slots according to TA, the actual transmission position of slot 19 is slot 3, and HARQ-ACK ebook is determined based on the set of K1 {1,2,3}, taking into account that slot 19 performs advance transmission of 16 slots according to TA. Assuming FDD operation mode, each time slot has independent uplink and downlinkResource, then each slot is a DL slot, thus according to n _ U' -k_iObtaining a timeslot 0, a timeslot 1, and a timeslot 2 as DL timeslots determined based on K1 with a timeslot n _ U ' as a reference (because each timeslot is DL for each symbol, it may not be determined whether SLIV is valid or not and whether the timeslot is valid or not, and is always considered to be valid), where n _ U is a timeslot number determined according to the HARQ-ACK feedback timing rule, that is, n _ U is 19 at this time, n _ U ' is an actual transmission timeslot number corresponding to TA advance transmission, that is, n _ U ' is 3 at this time, and assuming that there is only one PDSCH transmission in each DL timeslot at most, M is determined_A,cThe size of the set is 3, and includes 3 candidate PDSCH transmission positions, where the first position corresponds to slot 0, the second position corresponds to slot 1, and the third position corresponds to slot 2, assuming that each position only corresponds to 1-bit HARQ-ACK (of course, it may be multiple transport blocks TB according to the transmission mode, or it is determined that the correspondence exceeds 1-bit HARQ-ACK based on the coding block group CBG), so as to obtain HARQ-ACK codebook including 3-bit HARQ-ACK, and the terminal transmits the determined HARQ-ACKcodebook on the PUCCH resource corresponding to slot n _ U' (which may be a PUCCH resource indicated by an indication field in DCI scheduling PDSCH), where if the terminal does not receive PDSCH in a certain slot, negative NACK is generated as feedback information. All terminals in the cell perform the above operations according to their respective TA _ offsets, which can ensure that the uplink time when the different terminals reach the reference point of the cell are aligned and the transmission corresponding to the same n _ U number is performed by different terminals.

The base station follows the terminal in a similar manner, except that if the terminal is compensated with a relative TA (e.g., TA _ offset only compensates the TA corresponding to T3), there is also a difference in transmission delay of TA _ offset2 between the base station (gateway station) to the cell reference point of the terminal, this is partly required to determine the corresponding actual n _ U number on the base station side by offsetting TA _ offset2 on the basis of the timing corresponding to the cell reference point, that is, n _ U _ gNB is n _ U + TA _ offset2, for example, TA _ offset is 2 times the number of slots corresponding to T1+ T2, so that the base station receives HARQ-ACK in the uplink slot n _ U + TA _ offset2 in a size of 3 bits, and resolving HARQ-ACK corresponding to PDSCH in

time slots

0,1 and 2 from the HARQ-ACK codebook according to the same mapping relation of the same terminal side, and further determining whether retransmission needs to be carried out on the corresponding PDSCH according to the feedback information. If the terminal uses absolute TA (i.e., TA _ offset is offset by TA corresponding to T1, T2, and T3), i.e., the TA _ offset is a value including TA _ offset2, the base station can directly determine n _ U, i.e., n _ U _ gNB is n _ U, in the same manner as the terminal, without performing slot position conversion based on TA _ offset 2.

The method can ensure that the codebook can contain HARQ-ACK information of all candidate PDSCHs which are determined according to the feedback timing and are possible to carry out HARQ-ACK feedback in the time slot n _ U under the condition that the timing of the multiple terminals reaching the base station is aligned (namely the number of the HARQ-ACk feedback time slot n _ U determined according to the feedback timing by the terminals is consistent with the time of the HARQ-ACK codebook sent in the actual sending time slot reaching the base station, and is n _ U, so that the time of reaching one time slot n _ U of the base station is aligned when different terminals carry out uplink sending according to respective TA), and the HARQ-ACK information of all candidate PDSCHs which are determined according to the feedback timing and are possible to carry out HARQ-ACK feedback in the time slot n _ U can be contained. As shown in fig. 8, for the HARQ-ACK codebook corresponding to the time slot n _ U determined according to the feedback timing, when determining the candidate PDSCH according to the set of actual transmission time slots n _ U' and K1, M may be achieved_A,cThe set includes PDSCHs in time slots n of 0,1, and 3, and is consistent with the feedback correspondence understanding of the base station.

Example 2: and dynamic HARQ-ACK codebook. Basically, it is assumed that the same as embodiment 1, at this time, it is additionally assumed that the PDSCH candidate time domain position set corresponding to each DL slot includes one or more SLIVs, and each SLIV corresponds to a set of information for determining the PDSCH time domain position, including a starting symbol, a transmission length, and a K0 value, and for simplicity, it is assumed that a K0 value corresponding to each SLIV is fixed to 0 (of course, a K0 value may also be multiple, for example, K0 ═ {0,1, 2} and the like, so that for one DL slot determined in the above embodiment 1, it is required to be based on multiple K slots_0,jValue determines the time slots where multiple PDCCH detection opportunities are located, and further determines the corresponding PDCCH detection opportunities), then it may be determined that the DL time slots corresponding to n _ U' are time slots 0,1, 2 in the same manner as in embodiment 1, and further determined that the PDCCH detection opportunities corresponding to these DL time slots are also time slots 0,1, 2 according to K0, so as to determine PDCCH detection opportunities, and the corresponding PDCCH detection opportunities in time slots 0,1, 2 are determinedDetecting a PDCCH in the PDCCH detection opportunity, determining the size of HARQ-ACK codebook transmitted in a time slot n _ U 'and the sequence of HARQ-ACK corresponding to the PDSCH in the codebook according to DAI in the PDCCH, and transmitting the determined HARQ-ACK codebook on a PUCCH resource corresponding to the time slot n _ U'; and the same terminal at the base station side determines the size and the mapping sequence of the HARQ-ACK codebook, receives the HARQ-ACK codebook in the corresponding uplink time slot n _ U _ gNB, and determines whether the corresponding PDSCH needs to be retransmitted or not according to the feedback information. Wherein n _ U _ gNB is a receiving slot number of the base station side, and the determination method is the same as that in embodiment 1.

In the above example of the present invention, K1 is in units of timeslots, however, K1 may also be in units of other time lengths, for example, K1 is in units of first time units, and TA-offset time units may be the same as or different from K1, for example, TA _ offset is in units of second time units, and the first time units are the same as or different from the second time units; the first time unit or the second time unit is: a subframes, slots, or minislots (sub-slots), wherein a minislot is a predefined or configured time unit of fixed length, such as N symbols (OFDM symbols). As shown in fig. 9, an embodiment of the present invention further provides a terminal, including: a transceiver, a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor implementing the following steps when executing the computer program:

In fig. 9, among other things, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 900, and various circuits, represented by memory 920, 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 910 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. The user interface 930 may also be an interface capable of interfacing with a desired device for different user devices, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 900 is responsible for managing the bus architecture and general processing, and the memory 920 may store data used by the processor 900 in performing operations.

Optionally, the step of the processor 900 executing the procedure of determining the HARQ-ACK codebook in the first time slot according to the target time slot and the K1 set includes:

Optionally, the step of the processor 900 executing the procedure of determining the candidate PDSCH opportunity set corresponding to each carrier according to the target timeslot and the K1 set includes at least one of the following steps:

the method comprises the following steps:

Optionally, the step of executing the program for obtaining the candidate PDSCH opportunity set corresponding to each carrier according to each downlink timeslot by the processor 900 includes:

determining each downlink time slot as a candidate PDSCH opportunity; or,

Optionally, for the method 1, the processor 900 determines whether the SLIV is valid, including:

for the method 1, the processor 900 determines whether the SLIV is valid, including:

Optionally, the step of the processor 900 executing the procedure of determining the PDCCH detection opportunity set corresponding to each carrier according to the target timeslot, the K1 set, and the K0 set includes:

Optionally, the numbering of the uplink time slot is performed in a manner of aligning with the downlink time slot.

According to the terminal provided by the embodiment of the invention, when the HARQ-ACK is confirmed to be transmitted in the first time slot according to the feedback time sequence, the HARQ-ACK codebook in the first time slot is determined according to the target time slot n _ U' -n _ U-TA _ offset and the K1 set, so that the HARQ-ACK codebook can be ensured to correctly contain the PDSCH candidate position which needs to be subjected to HARQ-ACK feedback in the first time slot, and the normal transmission of the HARQ-ACK is ensured.

The terminal of the embodiment of the present invention can implement all implementation manners in the above determination method for the HARQ-ACK codebook applied to the terminal side, and can achieve the same technical effect, and for avoiding repetition, details are not repeated here.

In some embodiments of the invention, there is also provided a computer readable storage medium having stored thereon a computer program which when executed by a processor performs the steps of:

When executed by the processor, the program can implement all implementation manners in the above method for determining the HARQ-ACK codebook applied to the terminal side, and can achieve the same technical effect, and details are not described here again to avoid repetition.

As shown in fig. 10, an embodiment of the present invention further provides a terminal, including:

a first determining module 1001, configured to determine, when it is determined according to a feedback timing sequence that a hybrid automatic repeat request acknowledgement HARQ-ACK is transmitted in a first time slot, a HARQ-ACK codebook in the first time slot according to a target time slot and a K1 set;

In the terminal of the embodiment of the present invention, the first determining module includes:

a first determining submodule, configured to determine, according to the target time slot and a K1 set, a candidate PDSCH opportunity set corresponding to each carrier when the HARQ-ACK codebook is a semi-static HARQ-ACK codebook, where the candidate PDSCH opportunity set is a set of candidate PDSCH opportunities for performing HARQ-ACK feedback in one time slot;

and the second determining submodule is used for obtaining the HARQ-ACK codebook in the first time slot according to the candidate PDSCH opportunity set corresponding to each carrier.

In the terminal of the embodiment of the present invention, the first determining submodule is configured to execute at least one of the following methods:

the method comprises the following steps:

In the terminal of the embodiment of the present invention, as for the method 1, the first determining submodule is configured to determine that each downlink timeslot is a candidate PDSCH opportunity; or,

for the method 2, the first determining submodule is configured to determine, for each group of downlink timeslots, whether one SLIV in a SLIV set is valid in each downlink timeslot in the each group of downlink timeslots, and determine, when the SLIV set includes valid SLIVs, that the each group of downlink timeslots is a candidate PDSCH opportunity; or,

In the terminal of the embodiment of the present invention, as for the method 1, the first determining submodule is configured to determine that the SLIV is an invalid SLIV when a time domain symbol corresponding to the SLIV overlaps with at least one uplink symbol in a corresponding downlink time slot, and otherwise, determine that the SLIV is an valid SLIV;

for the method 2, the first determining submodule is configured to determine that the SLIV is an invalid SLIV when a time domain symbol corresponding to the SLIV overlaps with at least one uplink symbol in any one downlink slot of the corresponding set of downlink slots, and otherwise, determine that the SLIV is an valid SLIV.

a third determining submodule, configured to determine, when the HARQ-ACK codebook is a dynamic HARQ-ACK codebook, a PDCCH detection opportunity set corresponding to each carrier according to a target time slot, a K1 set, and a K0 set, where K0 is a set of time slot timing values representing an interval between a transmission time slot of a PDCCH and a transmission time slot of a PDSCH scheduled by the PDCCH;

and the fourth determining submodule is used for detecting the PDCCH in the full set of the PDCCH detection opportunity set corresponding to each carrier, and determining the HARQ-ACK codebook in the first time slot according to the detected downlink assignment index DAI value in the PDCCH.

In the terminal of the embodiment of the present invention, the third determining submodule is configured to determine, according to the target timeslot, the K1 set, the K0 set, and the number of repeated transmissions, a PDCCH detection opportunity set corresponding to each carrier under the condition that the number of repeated transmissions Krept of the PDSCH is configured.

In the terminal of the embodiment of the invention, the numbering of the uplink time slot is carried out in a mode of aligning with the downlink time slot.

As shown in fig. 11, an embodiment of the present invention further provides a network device, which may be specifically a base station, and includes a memory 1120, a processor 1100, a transceiver 1110, a bus interface, and a computer program stored in the memory 1120 and executable on the processor 1100, where the processor 1100 is configured to read a program in the memory 1120 and execute the following processes:

Where in fig. 11, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 1100, and various circuits, represented by memory 1120, 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 1110 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. The processor 1100 is responsible for managing the bus architecture and general processing, and the memory 1120 may store data used by the processor 1100 in performing operations.

Optionally, the step of the processor 1100 executing the procedure of determining the HARQ-ACK codebook in the first time slot according to the target time slot and the K1 set includes:

Optionally, the step of the processor 1100 executing the procedure of determining the candidate PDSCH opportunity set corresponding to each carrier according to the target timeslot and the K1 set includes at least one of the following steps:

the method comprises the following steps:

Optionally, the step of executing the program for obtaining the candidate PDSCH opportunity set corresponding to each carrier according to each downlink timeslot by the processor 1100 includes:

determining each downlink time slot as a candidate PDSCH opportunity; or,

Optionally, for the method 1, the processor 1100 determines whether the SLIV is valid, including:

for the method 2, the processor 1100 determines whether the SLIV is valid, including:

Optionally, the step of executing the procedure of determining the PDCCH detection opportunity set corresponding to each carrier according to the target timeslot, the K1 set, and the K0 set by the processor 1100 includes:

According to the network equipment of the embodiment of the invention, when the hybrid automatic repeat request acknowledgement HARQ-ACK is determined to be transmitted in the first time slot according to the feedback time sequence, the HARQ-ACK codebook in the first time slot is determined according to the target time slot n _ U' -n _ U-TA _ offset and the K1 set, so that the HARQ-ACK codebook can be ensured to correctly contain the PDSCH candidate position which needs to be subjected to HARQ-ACK feedback in the first time slot, and the normal transmission of the HARQ-ACK is ensured.

The network device of the embodiment of the present invention can implement all the implementation manners in the above determination method for determining the HARQ-ACK codebook applied to the network device side, and can achieve the same technical effect, and for avoiding repetition, details are not repeated here.

When executed by the processor, the program can implement all implementation manners in the above-described method for determining the HARQ-ACK codebook applied to the network device side, and can achieve the same technical effect, and is not described herein again to avoid repetition.

As shown in fig. 12, an embodiment of the present invention further provides a network device, including:

a second determining module 1201, configured to determine, when it is determined according to the feedback timing sequence that a hybrid automatic repeat request acknowledgement HARQ-ACK is received in a first time slot, a HARQ-ACK codebook in the first time slot according to a target time slot and a K1 set;

In the network device of the embodiment of the present invention, the second determining module includes:

a fifth determining submodule, configured to determine, according to the target time slot and a K1 set, a candidate PDSCH opportunity set corresponding to each carrier when the HARQ-ACK codebook is a semi-static HARQ-ACK codebook, where the candidate PDSCH opportunity set is a set of candidate PDSCH opportunities for performing HARQ-ACK feedback in one time slot;

and the sixth determining submodule is used for obtaining the HARQ-ACK codebook in the first time slot according to the candidate PDSCH opportunity set corresponding to each carrier.

In the network device according to the embodiment of the present invention, the fifth determining sub-module is configured to execute at least one of the following methods:

the method comprises the following steps:

In the network device of the embodiment of the present invention, as for the method 1, the fifth determining submodule is configured to determine that each downlink timeslot is a candidate PDSCH opportunity; or,

for the method 2, the fifth determining submodule is configured to determine, for each group of downlink timeslots, whether one SLIV in the SLIV set is valid in each downlink timeslot in the each group of downlink timeslots, and determine, when the SLIV set includes valid SLIVs, that the each group of downlink timeslots is a candidate PDSCH opportunity; or,

In the network device of the embodiment of the present invention, as for the method 1, the fifth determining sub-module is configured to determine that the SLIV is an invalid SLIV when a time domain symbol corresponding to the SLIV overlaps with at least one uplink symbol in a corresponding downlink time slot, and otherwise, determine that the SLIV is an valid SLIV;

for the method 2, the fifth determining submodule is configured to determine that the SLIV is an invalid SLIV when a time domain symbol corresponding to the SLIV overlaps with at least one uplink symbol in any one downlink slot of the corresponding set of downlink slots, and otherwise, determine that the SLIV is an valid SLIV.

a seventh determining submodule, configured to determine, when the HARQ-ACK codebook is a dynamic HARQ-ACK codebook, a PDCCH detection opportunity set corresponding to each carrier according to a target time slot, a K1 set, and a K0 set, where K0 is a set of time slot timing values indicating an interval between a transmission time slot of a PDCCH and a transmission time slot of a PDSCH scheduled by the PDCCH;

and the eighth determining submodule is used for detecting the PDCCH in the full set of the PDCCH detection opportunity set corresponding to each carrier, and determining the HARQ-ACK codebook in the first time slot according to the detected downlink assignment index DAI value in the PDCCH.

In the network device of the embodiment of the present invention, the seventh determining submodule is configured to determine, according to the target timeslot, the K1 set, the K0 set, and the number of repeated transmissions, a PDCCH detection opportunity set corresponding to each carrier under the condition that the number of repeated transmissions Krept of the PDSCH is configured.

In the network device of the embodiment of the present invention, the numbering of the uplink time slot is performed in a manner aligned with the numbering of the downlink time slot.

In various embodiments of the present invention, it should be understood that the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

While the foregoing is directed to the preferred embodiment of the present invention, 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 appended claims.

Claims

1. A method for determining a hybrid automatic repeat request acknowledgement codebook is applied to a terminal, and is characterized by comprising the following steps:

wherein the feedback timing sequence is: for a Physical Downlink Shared Channel (PDSCH) or a semi-persistent scheduling (SPS) PDSCH releasing release transmitted in a time slot n, determining HARQ-ACK for transmitting the PDSCH or HARQ-ACK for releasing the SPS PDSCH in a time slot n _ U, wherein n _ U is n + K + TA _ offset, the number n _ U' of a target time slot is n _ U-TA _ offset, K is one value in a K1 set, n _ U is the number of a first time slot, K1 is a set of time slot timing values representing the interval between the transmission time slot of the PDSCH and the corresponding transmission time slot of the HARQ-ACK, and TA _ offset is a value configured by signaling or calculated according to a predetermined mode and related to Timing Advance (TA);

the determining the HARQ-ACK codebook in the first time slot according to the target time slot and the K1 set comprises:

under the condition that the HARQ-ACK codebook is a semi-static HARQ-ACK codebook, determining a candidate PDSCH opportunity set corresponding to each carrier according to the target time slot and a K1 set, wherein the candidate PDSCH opportunity set is a set of candidate PDSCH opportunities for carrying out HARQ-ACK feedback in one time slot; obtaining a HARQ-ACK codebook in the first time slot according to the candidate PDSCH opportunity set corresponding to each carrier;

and/or, under the condition that the HARQ-ACK codebook is a dynamic HARQ-ACK codebook, determining a PDCCH detection opportunity set corresponding to each carrier according to a target time slot, a K1 set and a K0 set, wherein K0 is a set of time slot timing values representing intervals between transmission time slots of a PDCCH and transmission time slots of a PDSCH scheduled by the PDCCH; and detecting the PDCCH in the full set of the PDCCH detection opportunity set corresponding to each carrier, and determining the HARQ-ACK codebook in the first time slot according to the detected downlink assignment index DAI value in the PDCCH.

2. The method of claim 1, wherein the determining the candidate PDSCH opportunity set corresponding to each carrier according to the target timeslot and the K1 set comprises at least one of:

the method comprises the following steps:

obtaining a candidate PDSCH opportunity set corresponding to each carrier according to each group of downlink time slots; wherein, S is 0,1, … …, Krept-1, Krept is the repeat transmission times of PDSCH, and is not matched with PDSCHWhen the transmission is repeated, Krept is 1, k_iBelongs to K1, i is 0,1, … … and T-1, and T is the number of elements in K1.

3. The method of claim 2, wherein for method 1, obtaining the candidate PDSCH opportunity set corresponding to each carrier according to each downlink timeslot comprises:

determining each downlink time slot as a candidate PDSCH opportunity; or,

4. The method of claim 3, wherein determining whether the SLIV is valid for the method 1 comprises:

for the method 2, determining whether the SLIV is valid comprises:

5. The method of claim 1, wherein determining the set of PDCCH detection opportunities for each carrier according to the target time slot, the set of K1, and the set of K0 comprises:

6. The method of claim 1, wherein the numbering of the uplink time slots is done in alignment with the numbering of the downlink time slots.

7. A method for determining a hybrid automatic repeat request acknowledgement codebook is applied to a network device, and is characterized by comprising the following steps:

8. The method of claim 7, wherein the determining the candidate PDSCH opportunity set corresponding to each carrier according to the target time slot and the K1 set comprises at least one of the following methods:

the method comprises the following steps:

9. The method of claim 8, wherein for method 1, obtaining the candidate PDSCH opportunity set corresponding to each carrier according to each downlink timeslot comprises:

determining each downlink time slot as a candidate PDSCH opportunity; or,

10. The method of claim 9, wherein determining whether the SLIV is valid for method 1 comprises:

for the method 2, determining whether the SLIV is valid comprises:

11. The method of claim 7, wherein determining the set of PDCCH detection opportunities for each carrier according to the target time slot, the set of K1, and the set of K0 comprises:

12. The method of claim 7, wherein the numbering of the uplink time slots is done in alignment with the numbering of the downlink time slots.

13. A terminal, comprising: a transceiver, a memory, a processor, and a program stored on the memory and executable on the processor, wherein the processor when executing the program performs the steps of:

the step of the processor executing the procedure of determining the HARQ-ACK codebook in the first slot according to the target slot and the set of K1 comprises:

14. The terminal of claim 13, wherein the processor performs the step of determining the candidate PDSCH opportunity set for each carrier based on the target time slot and the K1 set, and wherein the step of determining the candidate PDSCH opportunity set for each carrier comprises the step of at least one of:

the method comprises the following steps:

15. The terminal of claim 14, wherein the processor performs a procedure for obtaining a candidate PDSCH opportunity set corresponding to each carrier according to each downlink timeslot, and the procedure comprises:

determining each downlink time slot as a candidate PDSCH opportunity; or,

16. The terminal of claim 15, wherein for method 1, the processor determines whether the SLIV is valid, comprising:

17. The terminal of claim 13, wherein the processor performs the procedure of determining the set of PDCCH detection opportunities for each carrier according to the target time slot, the set of K1, and the set of K0, and comprises:

18. The terminal of claim 13, wherein the numbering of the uplink time slots is done in alignment with the numbering of the downlink time slots.

19. 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 method for determining a hybrid automatic repeat request acknowledgement codebook according to any of claims 1 to 6.

20. A network device, comprising: a transceiver, a memory, a processor, and a program stored on the memory and executable on the processor, wherein the processor when executing the program performs the steps of:

21. The network device of claim 20, wherein the processor performs the step of determining the candidate PDSCH opportunity set for each carrier based on the target time slot and the K1 set, and wherein the step of determining the candidate PDSCH opportunity set for each carrier comprises the step of at least one of:

the method comprises the following steps:

22. The network device of claim 21, wherein the processor performs a procedure for obtaining a candidate PDSCH opportunity set corresponding to each carrier according to each downlink timeslot, the procedure comprising:

determining each downlink time slot as a candidate PDSCH opportunity; or,

23. The network device of claim 22, wherein for method 1, the processor determines whether the SLIV is valid, comprising:

24. The network device of claim 20, wherein the processor performs the process of determining the set of PDCCH detection opportunities for each carrier according to the target time slot, the set of K1, and the set of K0, comprising:

25. The network device of claim 20, wherein the numbering of the upstream time slots is done in alignment with the numbering of the downstream time slots.

26. 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 method for determining a hybrid automatic repeat request acknowledgement codebook according to any of claims 7 to 12.

27. A terminal, comprising:

the first determining module includes: a first determining submodule, configured to determine, according to the target time slot and a K1 set, a candidate PDSCH opportunity set corresponding to each carrier when the HARQ-ACK codebook is a semi-static HARQ-ACK codebook, where the candidate PDSCH opportunity set is a set of candidate PDSCH opportunities for performing HARQ-ACK feedback in one time slot; a second determining submodule, configured to obtain a HARQ-ACK codebook in the first time slot according to the candidate PDSCH opportunity set corresponding to each carrier;

and/or, the first determining module comprises: a third determining submodule, configured to determine, when the HARQ-ACK codebook is a dynamic HARQ-ACK codebook, a PDCCH detection opportunity set corresponding to each carrier according to a target time slot, a K1 set, and a K0 set, where K0 is a set of time slot timing values representing an interval between a transmission time slot of a PDCCH and a transmission time slot of a PDSCH scheduled by the PDCCH; and the fourth determining submodule is used for detecting the PDCCH in the full set of the PDCCH detection opportunity set corresponding to each carrier, and determining the HARQ-ACK codebook in the first time slot according to the detected downlink assignment index DAI value in the PDCCH.

28. A network device, comprising:

the second determining module includes: a fifth determining submodule, configured to determine, according to the target time slot and a K1 set, a candidate PDSCH opportunity set corresponding to each carrier when the HARQ-ACK codebook is a semi-static HARQ-ACK codebook, where the candidate PDSCH opportunity set is a set of candidate PDSCH opportunities for performing HARQ-ACK feedback in one time slot; a sixth determining submodule, configured to obtain a HARQ-ACK codebook in the first time slot according to the candidate PDSCH opportunity set corresponding to each carrier;

and/or the second determination module comprises: a seventh determining submodule, configured to determine, when the HARQ-ACK codebook is a dynamic HARQ-ACK codebook, a PDCCH detection opportunity set corresponding to each carrier according to a target time slot, a K1 set, and a K0 set, where K0 is a set of time slot timing values indicating an interval between a transmission time slot of a PDCCH and a transmission time slot of a PDSCH scheduled by the PDCCH; and the eighth determining submodule is used for detecting the PDCCH in the full set of the PDCCH detection opportunity set corresponding to each carrier, and determining the HARQ-ACK codebook in the first time slot according to the detected downlink assignment index DAI value in the PDCCH.