CN111865506B

CN111865506B - Semi-static codebook generation method and communication device

Info

Publication number: CN111865506B
Application number: CN201910363775.8A
Authority: CN
Inventors: 戴晶; 薛丽霞
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-04-30
Filing date: 2019-04-30
Publication date: 2023-12-12
Anticipated expiration: 2039-04-30
Also published as: CN111865506A; WO2020221303A1

Abstract

The application provides a method and a communication device for generating a semi-static codebook, wherein the method comprises the following steps: the terminal device receives indication information from the network device, wherein the indication information is used for dynamically changing the detection time of the PDCCH. And the terminal equipment determines candidate PDSCH receiving time corresponding to the HARQ-ACK sent on the first PUCCH resource according to the detection time of the PDCCH and the first time slot offset value set, wherein the PDCCH is used for scheduling the transmission of the PDSCH. And the terminal equipment determines a semi-static HARQ codebook of the HARQ-ACK transmitted on the first PUCCH according to the candidate PDSCH receiving occasion. The method provided by the application can reduce invalid NACK bits in the semi-static HARQ codebook, reduce the expenditure of the PUCCH resource of the feedback semi-static HARQ codebook and improve the reliability of the semi-static HARQ codebook.

Description

Semi-static codebook generation method and communication device

Technical Field

The present application relates to the field of communications, and more particularly, to a method and a communications device for generating a semi-static codebook.

Background

The downlink transmission of the current 5G New Radio (NR) supports the physical downlink shared channel (physical downlink shared channel, PDSCH) of semi-persistent scheduling (SPS) and the dynamically scheduled PDSCH. For dynamically scheduled PDSCH, transmission of one PDSCH is scheduled by one physical downlink control channel (physical downlink control channel, PDCCH). For downlink data transmission, hybrid automatic repeat request (hybrid automatic repeat request, HARQ) is an efficient transmission mechanism. On the one hand, the reliability of downlink data transmission can be greatly improved through retransmission, on the other hand, the terminal equipment feeds back Acknowledgement (ACK)/negative acknowledgement (negative acknowledgement, NACK) information of the HARQ, and only when the NACK is fed back, the network equipment needs to retransmit, so that the data transmission efficiency is improved. In the NR design, two HARQ-ACK codebook configurations are supported, namely a dynamic HARQ codebook (dynamic HARQ codebook) and a semi-static HARQ codebook (semi-static HARQ codebook). At present, in the generation of the semi-static HARQ codebook, larger redundancy exists, so that the resources occupied by the semi-static HARQ codebook are more, the waste of the resources is caused, and the reliability of the HARQ-ACK fed back in the semi-static HARQ codebook is reduced.

Disclosure of Invention

The application provides a method and a communication device for generating a semi-static codebook, which can reduce invalid NACK bits in the semi-static HARQ codebook, thereby improving the code rate of the semi-static HARQ codebook, reducing the expenditure of feeding back PUCCH resources of the semi-static HARQ codebook and improving the reliability of the semi-static HARQ codebook.

In a first aspect, a method for generating a semi-static codebook is provided, where an execution body of the method may be either a terminal device or a chip applied to the terminal device, and taking the execution body as an example of the terminal device, the method includes: the terminal equipment receives indication information from the network equipment, wherein the indication information is used for dynamically changing the detection time of the physical downlink control channel PDCCH. And the terminal equipment determines candidate Physical Downlink Shared Channel (PDSCH) receiving time corresponding to the HARQ-ACK (hybrid automatic repeat request acknowledgement) sent on the PUCCH resource of the first physical uplink control channel according to the detection time of the PDCCH and a first time slot offset value set, wherein the PDCCH is used for scheduling the transmission of the PDSCH, and the time slot offset value included in the first time slot offset value set is used for indicating the time slot offset value between the PDCCH and the PDSCH. And the terminal equipment determines a semi-static HARQ codebook of the HARQ-ACK transmitted on the first PUCCH according to the candidate PDSCH receiving occasion.

In the method for generating a semi-static codebook according to the first aspect, the candidate PDSCH reception timing is determined according to the dynamically changing PDCCH detection timing and the first set of slot offset values. The candidate PDSCH reception occasions only include PDSCH reception occasions where PDCCH detection occasion scheduling may occur, avoiding that the candidate PDSCH reception occasions include PDSCH invalid occasions. According to the candidate PDSCH receiving opportunity, the semi-static HARQ codebook is determined, and invalid NACK bits in the semi-static HARQ codebook can be reduced, so that the code rate of the semi-static HARQ codebook is improved, the expenditure of the PUCCH resource for feeding back the semi-static HARQ codebook is reduced, the reliability of the semi-static HARQ codebook is improved, and the communication efficiency is improved.

In a possible implementation manner of the first aspect, the indication information includes: at least one of a search space set corresponding to the PDCCH, a detection period of the PDCCH or the PDCCH detection skip information is activated or deactivated, wherein the search space set corresponding to the PDCCH comprises the detection period of the PDCCH; the method further comprises the steps of: and the terminal equipment determines the detection time of the PDCCH according to the indication information. In the implementation manner, the detection time of the PDCCH is determined according to the indication information, so that the accuracy of the determined detection time of the PDCCH can be improved, and the efficiency of determining the detection time of the PDCCH can be improved.

In a possible implementation manner of the first aspect, the method further includes: determining a time unit set corresponding to the time slot where the first PUCCH resource is located according to a second time slot offset value set and the time slot where the first PUCCH resource is located, wherein the time slot offset value included in the second time slot offset value set is used for indicating the time slot where the first PUCCH resource is located and the time slot offset value of a time unit in the time unit set; according to the detection timing and the first time slot offset value set of the PDCCH, determining a candidate PDSCH receiving timing corresponding to the HARQ-ACK transmitted on the first PUCCH resource comprises the following steps: and determining the candidate PDSCH receiving opportunity in the time unit set according to the detection opportunity of the PDCCH and the first time slot offset value set.

In a possible implementation manner of the first aspect, the PDCCH carries downlink control information DCI, where the DCI is used to schedule a PDSCH of a unicast type.

In a possible implementation manner of the first aspect, the DCI is scrambled corresponding to a cell radio network identifier C-RNTI, or to a modulation coding scheme cell radio network temporary identifier MCS-C-RNTI, or to a configuration scheduling radio network temporary identifier CS-RNTI.

In a possible implementation manner of the first aspect, the second set of slot offset values includes a number of slot offset values that is less than or equal to 4.

In a possible implementation manner of the first aspect, at least one candidate PDSCH time domain resource in the one or more candidate PDSCH time domain resources corresponding to the candidate PDSCH reception opportunity is a downlink symbol.

In a possible implementation manner of the first aspect, the indication information is further used to indicate that the harq_ack adopts a semi-static HARQ codebook.

In a second aspect, a method for generating a semi-static codebook is provided, where an execution body of the method may be a network device or a chip applied to the network device, and the execution body is exemplified as the network device, and the method includes: the network device sends indication information to the terminal device, wherein the indication information is used for dynamically changing the detection time of the physical downlink control channel PDCCH. And the network equipment determines candidate Physical Downlink Shared Channel (PDSCH) receiving time corresponding to the HARQ-ACK received on the PUCCH resource according to the detecting time of the PDCCH and a first time slot offset value set, wherein the PDCCH is used for scheduling the transmission of the PDSCH, and the time slot offset value included in the first time slot offset value set is used for indicating the time slot offset value between the PDCCH and the PDSCH. And the network equipment determines a semi-static HARQ codebook of the HARQ-ACK received on the first PUCCH resource according to the candidate PDSCH receiving occasion.

The method for generating a semi-static codebook according to the second aspect is provided, because the candidate PDSCH reception timing is determined according to the dynamically changing PDCCH detection timing and the first set of slot offset values. The candidate PDSCH reception occasions only include PDSCH reception occasions where PDCCH detection occasion scheduling may occur, avoiding that the candidate PDSCH reception occasions include PDSCH invalid occasions. According to the candidate PDSCH receiving time, the semi-static HARQ codebook is determined, and invalid NACK bits in the semi-static HARQ codebook can be reduced, so that the code rate of the semi-static HARQ codebook is improved, the expenditure of the PUCCH resource for feeding back the semi-static HARQ codebook is reduced, and the reliability of the semi-static HARQ codebook is improved.

In a possible implementation manner of the second aspect, the indication information includes: at least one of a search space set corresponding to the PDCCH, a detection period of the PDCCH, or the PDCCH detection skip information is activated or deactivated, wherein the search space set corresponding to the PDCCH includes the detection period of the PDCCH.

In a possible implementation manner of the second aspect, the method further includes: and determining a time unit set corresponding to the time slot where the first PUCCH resource is located according to a second time slot offset value set and the time slot where the first PUCCH resource is located, wherein the time slot offset value included in the second time slot offset value set is used for indicating the time slot where the first PUCCH resource is located and the time slot offset value of a time unit in the time unit set. According to the detection timing and the first time slot offset value set of the PDCCH, determining a candidate PDSCH receiving timing corresponding to the HARQ-ACK received on the first PUCCH resource comprises the following steps: and determining the candidate PDSCH receiving opportunity in a time unit set according to the detection opportunity of the PDCCH and the first time slot offset value set.

In a possible implementation manner of the second aspect, the PDCCH carries downlink control information DCI, where the DCI is used to schedule a PDSCH of a unicast type.

In a possible implementation manner of the second aspect, the DCI is scrambled corresponding to a cell radio network identifier C-RNTI, or to a modulation coding scheme cell radio network temporary identifier MCS-C-RNTI, or to a configuration scheduling radio network temporary identifier CS-RNTI.

In a possible implementation manner of the second aspect, the second set of slot offset values includes a number of slot offset values that is less than or equal to 4.

In a possible implementation manner of the second aspect, at least one candidate PDSCH time domain resource in the one or more candidate PDSCH time domain resources corresponding to the candidate PDSCH receiving opportunity is a downlink symbol.

In a third aspect, a communication device is provided, the device comprising means for performing the steps of the above first aspect or any possible implementation of the first aspect.

In a fourth aspect, there is provided a communication device comprising means for performing the steps of the second aspect above or any possible implementation of the second aspect.

In one design, the communication device is a communication chip that may include an input circuit or interface for transmitting information or data, and an output circuit or interface for receiving information or data.

In another design, the communication device is a communication device (e.g., a terminal device or an access network device) that may include a transmitter for transmitting information or data and a receiver for receiving information or data.

In a fifth aspect, a communication device is provided, the device comprising at least one processor and a memory, the at least one processor being configured to perform the method of the first aspect or any of the possible implementations of the first aspect.

In a sixth aspect, a communication device is provided, the device comprising at least one processor and a memory, the at least one processor being configured to perform the method of the second aspect above or any possible implementation of the second aspect.

In a seventh aspect, a communication device is provided, the device comprising at least one processor and interface circuitry, the at least one processor being configured to perform the method of the first aspect above or any possible implementation of the first aspect.

In an eighth aspect, a communication device is provided, the device comprising at least one processor and interface circuitry, the at least one processor being configured to perform the method of the second aspect above or any possible implementation of the second aspect.

In a ninth aspect, there is provided a processor comprising: input circuit, output circuit and processing circuit. The processing circuit is configured to receive a signal via the input circuit and transmit a signal via the output circuit, such that the processor performs the first and second aspects, or the methods in each implementation of any of the first and second aspects.

In a specific implementation process, the processor may be a chip, the input circuit may be an input pin, the output circuit may be an output pin, and the processing circuit may be a transistor, a gate circuit, a trigger, various logic circuits, and the like. The input signal received by the input circuit may be received and input by, for example and without limitation, a receiver, the output signal may be output by, for example and without limitation, a transmitter and transmitted by a transmitter, and the input circuit and the output circuit may be the same circuit, which functions as the input circuit and the output circuit, respectively, at different times. The embodiment of the application does not limit the specific implementation modes of the processor and various circuits.

In a tenth aspect, there is provided a terminal device comprising the communication apparatus provided in the third aspect, or the terminal comprising the communication apparatus provided in the fifth aspect, or the terminal comprising the communication apparatus provided in the seventh aspect.

In an eleventh aspect, there is provided a network device comprising the communication apparatus provided in the fourth aspect, or the network device comprising the communication apparatus provided in the sixth aspect, or the network device comprising the communication apparatus provided in the eighth aspect.

In a twelfth aspect, there is provided a computer program product comprising a computer program for performing the method of the first aspect or any possible implementation of the first aspect or the method of the second aspect or any possible implementation of the second aspect when executed by a processor.

A thirteenth aspect provides a computer readable storage medium having stored therein a computer program for performing the method of the first aspect or any possible implementation of the first aspect or performing the method of the second aspect or any possible implementation of the second aspect when the computer program is executed.

According to the method provided by the application, since the candidate PDSCH receiving opportunity is determined according to the dynamically changed PDCCH detection opportunity and the first time slot offset value set. The candidate PDSCH reception occasions only include PDSCH reception occasions where PDCCH detection occasion scheduling may occur, avoiding that the candidate PDSCH reception occasions include PDSCH invalid occasions. According to the candidate PDSCH receiving time, the semi-static HARQ codebook is determined, and invalid NACK bits in the semi-static HARQ codebook can be reduced, so that the code rate of the semi-static HARQ codebook is improved, the expenditure of the PUCCH resource for feeding back the semi-static HARQ codebook is reduced, and the reliability of the semi-static HARQ codebook is improved. Especially, under the condition of larger PDCCH period, the reliability of the semi-static HARQ codebook can be improved to a great extent, and the communication efficiency is improved.

Drawings

Fig. 1 is a schematic diagram of an architecture of a mobile communication system suitable for use in an embodiment of the present application.

Fig. 2 is a schematic diagram illustrating an example of determining a semi-static codebook feedback HARQ-ACK according to a K1 set.

Fig. 3 is a schematic diagram of another example of determining a semi-static codebook feedback HARQ-ACK from a K1 set.

Fig. 4 is a schematic diagram illustrating still another example of determining a semi-static codebook feedback HARQ-ACK according to a K1 set.

Fig. 5 is a schematic interaction diagram of a method for generating a semi-static codebook according to an embodiment of the present application.

Fig. 6 is a schematic interaction diagram of another example of a method for generating a semi-static codebook according to an embodiment of the present application.

Fig. 7 is a schematic diagram of determining a candidate PDSCH reception occasion according to the second set of slot offset values, the first set of slot offset values, and the PDCCH detection occasion according to an embodiment of the present application.

Fig. 8 is a schematic diagram of a communication device according to an embodiment of the present application.

Fig. 9 is a schematic diagram of another example of a communication device according to an embodiment of the present application.

Fig. 10 is a schematic diagram of a communication device according to an embodiment of the present application.

Fig. 11 is a schematic diagram of another example of a communication device according to an embodiment of the present application.

Fig. 12 is a schematic diagram of a terminal device according to an embodiment of the present application.

Fig. 13 is a schematic diagram of a network device according to an embodiment of the present application.

Detailed Description

The technical scheme of the application will be described below with reference to the accompanying drawings.

The technical scheme of the embodiment of the application can be applied to various communication systems, such as: global system for mobile communications (Global System of Mobile communication, GSM), code division multiple access (Code Division Multiple Access, CDMA), wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA) systems, general packet Radio service (General Packet Radio Service, GPRS), long term evolution (Long Term Evolution, LTE) systems, LTE frequency division duplex (Frequency Division Duplex, FDD) systems, LTE time division duplex (Time Division Duplex, TDD), universal mobile telecommunications system (Universal Mobile Telecommunication System, UMTS), worldwide interoperability for microwave access (Worldwide Interoperability for Microwave Access, wiMAX) communication systems, future fifth generation (5th Generation,5G) systems or New Radio, NR) systems, and the like.

Fig. 1 is a schematic diagram of an architecture of a mobile communication system suitable for use in an embodiment of the present application. As shown in fig. 1, the mobile communication system 100 may include a core network device 110, a radio access network device 120, and at least one terminal device (e.g., terminal device 130 and terminal device 140 shown in fig. 1). The terminal equipment is connected with the wireless access network equipment in a wireless mode, and the wireless access network equipment is connected with the core network equipment in a wireless or wired mode. The core network device and the radio access network device may be separate physical devices, or may integrate the functions of the core network device and the logic functions of the radio access network device on the same physical device, or may integrate the functions of part of the core network device and part of the radio access network device on one physical device. The terminal device may be fixed in position or may be movable. Fig. 1 is only a schematic diagram, and other network devices may be further included in the communication system, for example, a wireless relay device and a wireless backhaul device may also be included, which are not shown in fig. 1. The embodiment of the application does not limit the number of the core network equipment, the radio access network equipment and the terminal equipment included in the mobile communication system.

The Terminal devices in the mobile communication system 100 may also be referred to as a Terminal, a User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (MT), and the like. The terminal device may be a mobile phone, a tablet (Pad), a computer with wireless transceiving function, a Virtual Reality (VR) terminal device, an augmented Reality (Augmented Reality, AR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in unmanned driving (self driving), a wireless terminal in teleoperation (remote medical surgery), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation security (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), etc. The terminal device and the chip applicable to the terminal device are collectively called as a terminal device in the present application. It should be understood that the embodiment of the present application does not limit the specific technology and the specific device configuration adopted by the terminal device.

In the mobile communication system 100, the radio access network device 120 is an access device to which a terminal device accesses by wireless. The radio access network device 120 may be: a base station, an evolved node B (bs), a home base station, an Access Point (AP) in a WIFI system, a wireless relay node, a wireless backhaul node, a transmission point (transmission point, TP), or a transmission reception point (transmission and reception point, TRP), etc., may also be a gNB in a NR system, or may also be a component or a part of a device that forms a base station, such as a Centralized Unit (CU), a Distributed Unit (DU), or a baseband unit (BBU), etc. It should be understood that in the embodiments of the present application, the specific technology and specific device configuration adopted by the radio access network device are not limited. In the present application, the radio access network device is simply referred to as a network device, and if not specifically described, in the present application, the network devices are referred to as radio access network devices. In the present application, the network device may refer to the network device itself, or may be a chip applied to the network device to complete the wireless communication processing function.

In the embodiment of the application, the terminal equipment or the network equipment comprises a hardware layer, an operating system layer running on the hardware layer and an application layer running on the operating system layer. The hardware layer includes hardware such as a central processing unit (central processing unit, CPU), a memory management unit (memory management unit, MMU), and a memory (also referred to as a main memory). The operating system may be any one or more computer operating systems that implement business processes through processes (processes), such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a windows operating system. The application layer comprises applications such as a browser, an address book, word processing software, instant messaging software and the like. Further, the embodiment of the present application is not particularly limited to the specific structure of the execution body of the method provided by the embodiment of the present application, as long as the communication can be performed by the method provided according to the embodiment of the present application by running the program recorded with the code of the method provided by the embodiment of the present application, and for example, the execution body of the method provided by the embodiment of the present application may be a terminal device or a network device, or a functional module in the terminal device or the network device that can call the program and execute the program.

Furthermore, various aspects or features of the application may be implemented as a method, apparatus, or article of manufacture using standard programming and/or engineering techniques. The term "article of manufacture" as used herein encompasses a computer program accessible from any computer-readable device, carrier, or media. For example, computer-readable media can include, but are not limited to, magnetic storage devices (e.g., hard disk, floppy disk, or magnetic strips, etc.), optical disks (e.g., compact disk, CD, digital versatile disk, digital versatile disc, DVD, etc.), smart cards, and flash memory devices (e.g., erasable programmable read-only memory, EPROM), cards, sticks, or key drives, etc. Additionally, various storage media described herein can represent one or more devices and/or other machine-readable media for storing information. The term "machine-readable medium" can include, without being limited to, wireless channels and various other media capable of storing, containing, and/or carrying instruction(s) and/or data.

In order to facilitate understanding of the embodiments of the present application, a brief description of several concepts related to the present application will be provided below.

Time unit and time domain symbol:

the time domain resources used by the base station and the terminal device for wireless communication may be divided into a plurality of time units. In addition, in the embodiment of the present application, the plurality of time units may be continuous, or a preset interval may be provided between some adjacent time units, and the embodiment of the present application is not particularly limited.

In the embodiment of the present application, the length of one time unit is not limited. For example, 1 time unit may be one or more subframes; alternatively, one or more time slots are also possible; alternatively, one or more symbols may be used. Where one subframe is 1ms, one slot includes 14 symbols in case of a normal cyclic prefix and 12 symbols in case of an extended cyclic prefix.

In an embodiment of the present application, the symbols are also referred to as time domain symbols, which may be orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) symbols, or single carrier frequency division multiple access (single carrier frequency division multiple access, SC-FDMA) symbols, where SC-FDMA is also referred to as orthogonal frequency division multiplexing (orthogonal frequency division multiplexing with transform precoding, OFDM with TP) with transform precoding.

The terminal device in the embodiments of the present application may refer to a user device, an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user apparatus. The terminal device may also be a cellular telephone, a cordless telephone, a session initiation protocol (Session Initiation Protocol, SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital assistant (Personal Digital Assistant, PDA), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G network or a terminal device in a future evolved public land mobile network (Public Land Mobile Network, PLMN), etc., as embodiments of the present application are not limited in this regard.

The network device in the embodiment of the present application may be a device for communicating with a terminal device, where the network device may be a base station (Base Transceiver Station, BTS) in a global system for mobile communications (Global System of Mobile communication, GSM) or code division multiple access (Code Division Multiple Access, CDMA), a base station (NodeB, NB) in a wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA) system, an evolved base station (eNB or eNodeB) in an LTE system, a wireless controller in a cloud wireless access network (Cloud Radio Access Network, CRAN) scenario, or the network device may be a relay station, an access point, a vehicle-mounted device, a wearable device, a network device in a future 5G network, or a network device in a future evolved PLMN network, etc., and the embodiment of the present application is not limited.

The downlink transmission of the current 5G New Radio (NR) supports the physical downlink shared channel (physical downlink shared channel, PDSCH) of semi-persistent scheduling (SPS) and the dynamically scheduled PDSCH. For downlink data transmission, hybrid automatic repeat request (hybrid automatic repeat request, HARQ) is an efficient transmission mechanism. On the one hand, the reliability of downlink data transmission can be greatly improved through retransmission, on the other hand, the terminal equipment feeds back Acknowledgement (ACK)/negative acknowledgement (negative acknowledgement, NACK) information of the HARQ, and only when the NACK is fed back, the network equipment needs to retransmit, so that the data transmission efficiency is improved.

Dynamic PDSCH may be understood as one PDSCH is scheduled by one PDCCH, the time-frequency location of each PDSCH may be different, and a specific time-frequency location is indicated by the PDCCH corresponding to each PDSCH; the ACK/NACK feedback timing for each PDSCH may also be different, and the specific feedback timing is indicated by the PDCCH for each PDSCH. Such PDSCH may also be referred to as dynamic PDSCH, or PDSCH with scheduling information.

The SPS PDSCH may be understood as a mode used by a configuration period, for example, the network device may deactivate transmission of multiple SPS PDSCH by sending an activation PDCCH, where the activation PDCCH may be used to indicate a time domain position of the first SPS PDSCH, a time frequency position of a time slot where the first SPS PDSCH is located, a feedback information of ACK or NACK corresponding to the SPS PDSCH, etc., and the network device may configure the period of the SPS PDSCH by sending configuration information through higher layer signaling, and in combination with these information, the terminal device may determine a position of receiving the SPS PDSCH and a position of the feedback information of ACK or NACK corresponding to the SPS PDSCH.

In the NR design, two HARQ-ACK codebook modes are supported. Specifically, the network device may indicate which HARQ-ACK codebook mode to use at this time to generate the HARQ-ACK codebook by sending configuration information. The HARQ-ACK codebook may be understood as an arrangement of ACK/NACK corresponding to PDSCH that needs to be fed back in a certain uplink time unit, and includes a 2-layer meaning: first: the HARQ-ACK codebook contains ACK/NACKs for which PDSCH. Second,: the order of the ACK/NACK of these PDSCHs in the codebook. That is, the feedback information ACK/NACK of the plurality of PDSCHs, which need to be transmitted in the same uplink time unit, is arranged in a series of consecutive bits in a certain order, thereby forming the HARQ-ACK codebook. The two HARQ-ACK codebook modes include a Dynamic codebook (Dynamic codebook) mode and a Semi-static codebook (Semi-static codebook) mode. The HARQ-ACK codebook generation modes in different codebook modes are different.

For the semi-static HARQ-ACK Codebook, also known as Type 1 HARQ Codebook. The semi-static codebook determination process is divided into the following steps:

first, the terminal device determines a slot for transmitting ACK/NACK feedback information as an i-th slot. The specific time slot i is determined according to the PDCCH corresponding to the PDSCH. One row in a pre-configured or pre-defined time domain resource table is indicated in the PDCCH. The time domain resource table includes a plurality of rows, and each row may include one PDSCH time domain resource allocation index, a value of K0, S, L corresponding to the PDSCH time domain resource allocation index, and a PDSCH mapping type. S indicates a start (start) symbol number of a time domain resource within one slot. L indicates the number of symbols that last for the time domain resource in the slot. L (length) is a number of symbols representing the number of symbols occupied by the data channel, and may be referred to as the number of continuous symbols of the data channel, or may be referred to as the time domain length of the data channel. L is the number of consecutive symbols starting from S. K0 means the number of slots of the interval between the slots where PDCCH to PDSCH are located. S and L may be jointly encoded into one start and length indication value (start and length indicator value, SLIV) parameter, which may be used to indicate the number of start symbols and symbols occupied by the PDSCH. The terminal device can determine the time slot in which the PDSCH scheduled by the PDSCH is located and the time domain resource position in the time slot according to the PDSCH time domain resource allocation index indicated by the PDCCH. For example, assuming that the terminal device receives the PDCCH in the nth slot, and the value of K0 is 1, the slot in which the PDSCH scheduled by the PDCCH is located is the n+1th slot. For PDSCH mapping types, the PDSCH mapping types are mainly time domain symbol positions of demodulation reference signals (demodulation reference signal, DMRS) of the PDSCH, and can also be used to determine all reasonable starting positions, durations, etc. of the PDSCH. PDSCH mapping includes two types: type a (type a) or type B (type B). type a indicates that the position of the first DMRS is in the 3 rd or 4 th symbol of slot, and type B indicates that the position of the first DMRS is in the first symbol of the data start.

The time domain resource table is described below in connection with the example of table 1.

TABLE 1

As shown in the time domain table in table 1, it is assumed that the terminal device receives the PDCCH in the 1 st time slot, the PDCCH may carry a PDSCH time domain resource allocation index, and after the terminal device receives the PDCCH, it may be determined that the time slot in which the PDSCH is located is time slot 2 according to index 0, and the PDSCH is transmitted on the symbol with symbol number 2 to the symbol with symbol number 5 in time slot 2.

It should be understood that table 1 is merely exemplary and should not impose any limitation on the time resource tables.

Assuming that the timeslot where the PDSCH is located is timeslot n, a K1 value is also indicated in the PDCCH, where K1 is used to indicate the timeslot offset value from the PDSCH to the corresponding ACK/NACK feedback. The terminal device may determine, according to the K1 value and the time slot in which the PDSCH is located as time slot n, that the time slot in which the ACK/NACK feedback corresponding to the PDSCH is located is n+k1, that is, use a physical uplink control channel (physical uplink control channel, PUCCH) to feed back the ACK/NACK on the time slot of n+k1.

Let n + K1 be time slot i. Then, the terminal device obtains a set of possible values K1 (K1 set) of K1 according to the configuration information sent by the network device, and based on the above information, the terminal device determines all slots in which all PDSCH to send feedback information in the ith slot are located, that is, determines a set of candidate PDSCH reception opportunities (occasion set for candidate PDSCH receptions) composed of all candidate PDSCH reception opportunities (PDSCH candidate occasion) to send feedback information in the ith slot. And then according to the set, obtaining the fed back HARQ-ACK bits according to the timing (occalation) sequence. And filling negative acknowledgement NACK in the HARQ-ACK bits fed back for occasin without actual PDSCH scheduling in the candidate PDSCH receiving opportunity set. Finally, the ACK/NACK corresponding to all the candidate PDSCH receiving opportunities are serially connected in sequence from front to back in the time domain according to PDSCH candidate occasion and all the time slots are serially connected in sequence from front to back in the time domain, so that an HARQ-ACK codebook is generated in series. And finally generating a semi-static HARQ-ACK codebook.

The generation process of the semi-static HARQ-ACK codebook is described below in connection with a specific example.

Assume that the network device configures the terminal device with a K1 set {1,2,3,4} through the configuration information RRC. The network device schedules PDSCH1 through PDCCH1, as shown in fig. 2, and fig. 2 shows an example of determining a semi-static codebook feedback HARQ-ACK according to the K1 set. Downlink control information (downlink control information, DCI) carried in PDCCH1 indicates that K1 is 3. The terminal device determines that the resources of the ACK/NACK corresponding to the PDSCH1 to the feedback PDSCH1 are PUCCH1 according to the DCI indication K1 as 3, and the time slot in which the PDSCH1 is positioned is assumed to be the time slot n, and the time slot in which the PUCCH1 is positioned is the time slot n+3. Before feeding back the HARQ-ACK on PUCCH1, the terminal device needs to first obtain a candidate PDSCH reception occasion set according to the K1 set {1,2,3,4} (occasion set for candidate PDSCH receptions). According to the K1 set, the feedback of the n+3th time slot is ACK/NACK corresponding to all PDSCH received in the 4 time slots of the n+2th time slot, the n+1th time slot, the n time slot and the n-1 th time slot. The candidate PDSCH receiving opportunity set determined by the terminal device includes a time slot n+2, a time slot n+1, a time slot n, and a time slot n-1. I.e. feedback of ACK/NACK for PDSCH on slots n-1, n, n+1, and n+2 is required in slot n+3. And then according to the set, acquiring the fed back HARQ-ACK bits according to the PDSCH timing (occalation) sequence. And filling negative acknowledgement NACK in the HARQ-ACK bit fed back for occalasion without actual PDSCH scheduling in the set. Assuming that only one PDSCH can be scheduled per slot and only 1 bit ACK/NACK is fed back for each PDSCH, PUCCH1 in slot n+3 needs to feed back 4 bits of ACK/NACK.

Fig. 3 is another example of determining a semi-static HARQ codebook feedback HARQ-ACK from a K1 set. The network device configures the terminal device with a K1 set {1,2,3,4} through the configuration information. The network device schedules three PDSCH as shown in fig. 3 through three different PDCCHs sequentially, where the three PDSCH are PDSCH1, PDSCH2, and PDSCH3, respectively, and the three different PDCCHs all indicate PUCCH1 for feeding back harq_ack of PDSCH1, PDSCH2, and PDSCH 3. PDSCH1 is located on slot n, PDSCH2 is located on slot n+1, and PDSCH3 is located on slot n+3. Assuming that the corresponding K1 of PDSCH1 is 4, the time slot in which the ACK/NACK resource of PDSCH1 is PUCCH11 is time slot n+4. Before feeding back the HARQ-ACK on PUCCH1, the terminal device needs to first determine a candidate PDSCH reception occasion set from the K1 set {1,2,3,4} (occasion set for candidate PDSCH receptions). The candidate PDSCH receiving opportunity set determined by the terminal device includes a time slot n+3, a time slot n+2, a time slot n+1, and a time slot n. I.e. ACK/NACK for PDSCH on slots n, n+1, n+2, and n+3 is needed in slot n+4. Assuming that only one PDSCH can be scheduled per slot and that only 1 bit ACK/NACK is fed back for each PDSCH, since there is no scheduled PDSCH on slot n+2, the feedback information corresponding to slot n+2 is NACK. PUCCH1 in slot n+4 requires feedback of 4-bit ACK/NACK.

It should be appreciated that it is assumed in the examples of fig. 2 and 3 that only one PDSCH is scheduled per slot and that only 1-bit ACK/NACK needs to be fed back for each PDSCH. If more than one PDSCH can be scheduled for one slot and/or one PDSCH needs to feed back n-bit ACK/NACK for more than 1 bit, then for each occalasion in the same slot or in a different slot that is not scheduled for PDSCH in the candidate PDSCH reception occasion set, the n-bit NACK is filled in the corresponding HARQ-ACK feedback.

It should also be understood that the examples shown in fig. 2 and 3 are based on FDD systems, i.e. the uplink and downlink transmissions respectively belong to different carriers. If, in a TDD system, the candidate PDSCH reception opportunity set is determined to consider not only the K1 set, but also that the PDSCH candidate time domain resources and the symbols of the slot have no collision in uplink and downlink properties, that is, it needs to be ensured that at least one PDSCH candidate time domain resource in the slot cannot contain an uplink symbol. If all PDSCH candidate time domain resources within the slot contain uplink symbols, the slot is excluded from the candidate PDSCH reception opportunity set.

At present, how to reduce the power consumption of a terminal device is a problem to be solved. Reducing PDCCH detection is one of the important means. Among them, dynamically changing the PDCCH detection period is one technique to reduce PDCCH detection. The technology has the following effects: when the data transmission requirement is smaller or no data transmission requirement exists, the network equipment indicates the terminal equipment to adopt a larger PDCCH detection period, so that the corresponding PDCCH detection time (occalation) times are less, and the effect of saving power consumption is achieved. When a data transmission requirement appears or the data transmission requirement is larger, the network equipment instructs the terminal equipment to reduce the PDCCH detection period, and the terminal equipment correspondingly increases the PDCCH detection time to provide more opportunities for the network equipment to send PDCCH for indicating data scheduling, thereby reducing scheduling and data transmission time delay and improving the data transmission rate.

For the case where the PDCCH detection period is large, since PDSCH is scheduled by PDCCH, more PDSCH occalation where PDCCH scheduling is impossible may occur. As shown in fig. 4, fig. 4 is yet another example of determining a semi-static HARQ codebook feedback HARQ-ACK from a K1 set. In the example shown in fig. 4, the PDCCH detection period is 8 slots, the K1 set is {1,2,3,4,5,6,7,8}, and it is assumed that PDCCH1 is used to schedule PDSCH1, and K0 indicated by DCI in PDCCH1 is 1, and K1 is 6. The candidate PDSCH reception occasion set including candidate PDSCH reception occasions on 8 slots of slot n-1 through slot n+6 is determined from the K1 set {1,2,3,4 }. Since the PDCCH detection period is 8 slots, out of the 8 slots included in the candidate PDSCH reception opportunity set, PDSCH1 may only occur in slot n+1, PDSCH may not occur in the other 7 slots, and the other 7 slots may be referred to as PDSCH null opportunities (invalid PDSCH occasion). In this case, according to the above-described generation process of the semi-static HARQ codebook, there are a large number of NACK fills corresponding to PDSCH null occasions. As shown in fig. 4, assuming that one PDSCH occasion corresponds to 1-bit ACK/NACK, 7 bits in the 8-bit HARQ-ACK feedback in the semi-static HARQ codebook on PDCCH1 are invalid NACK bits, and none of the 7-bit invalid NACKs corresponds to PDSCH transmission. This results in a larger PUCCH resource overhead for feedback of HARQ-ACKs, and the padded NACK reduces the code rate of HARQ-ACKs that actually need feedback,

In view of this, the present application provides a method for generating a semi-static codebook, which combines detection opportunities of dynamically changing PDCCHs of a scheduled PDSCH to determine candidate PDSCH reception opportunities, which correspond to the dynamically changing PDCCH detection opportunities. And determining a semi-static HARQ codebook according to the candidate PDSCH receiving opportunity. Invalid NACK bits in the semi-static HARQ codebook can be reduced, so that the code rate of the semi-static HARQ codebook is improved, the expenditure of the PUCCH resource of the feedback semi-static HARQ codebook is reduced, the reliability of the semi-static HARQ codebook is improved, and the communication efficiency is improved.

The method for generating a semi-static codebook according to the present application is described in detail below with reference to fig. 5, and fig. 5 is a schematic interaction diagram of a method 200 for generating a semi-static codebook according to an embodiment of the present application, where the method 200 may be applied to the scenario shown in fig. 1, and of course, may also be applied to other communication scenarios, and embodiments of the present application are not limited herein.

It should be understood that, in the embodiment of the present application, the method 200 is described taking a terminal device and a network device as an execution body for executing the method 200 as an example. By way of example and not limitation, the execution subject of the execution method 200 may also be a chip applied to a terminal device and a chip applied to a network device.

As shown in fig. 5, the method 200 includes S210 to S230.

S210, the network device sends indication information to the terminal device, where the indication information is used to dynamically change the detection timing of the PDCCH. Correspondingly, the terminal equipment receives the indication information.

S220, the terminal equipment determines candidate PDSCH receiving time corresponding to the HARQ-ACK sent on the first PUCCH resource according to the detection time of the PDCCH and a first time slot offset value set, wherein the PDCCH is used for scheduling the transmission of the PDSCH, and the time slot offset value included in the first time slot offset value set is used for indicating the time slot offset value between the PDCCH and the PDSCH.

And S230, the terminal equipment determines a semi-static HARQ codebook of the HARQ-ACK transmitted on the first PUCCH according to the candidate PDSCH receiving opportunity.

Specifically, when PDSCH transmission is scheduled by the PDCCH, the period of the detection timing of the PDCCH may be relatively large. The detection timing of the PDCCH may be understood as a time domain resource where the PDCCH is located. The network device may transmit the PDCCH on a pre-configured or predefined PDCCH time domain resource where the terminal device detects the PDCCH. Alternatively, multiple sets of search space (SS set)) of PDCCH may be preconfigured or predefined, with different sets of search space corresponding to different PDCCH detection periods and detection occasions. And the union set of the PDCCH detection opportunities corresponding to the plurality of search space sets is the PDCCH detection opportunity of the terminal equipment. For example, for one set of search spaces, a set of periods of PDCCHs may be preconfigured or predefined, the set of periods including periods of multiple PDCCHs. Assuming that the period set of the PDCCH is {1,2,4,8,10,20}, the unit is a slot, and the first PDCCH is transmitted in slot n, there are different PDCCH detection opportunities corresponding to different PDCCH periods. For example, for PDCCH period of 2, the PDCCH detection occasion is slot n, slot n+2, slot n+4, slot n+6, etc., i.e., every other two slots is one PDCCH detection occasion. For PDCCH period of 8, the PDCCH detection occasions are slot n, slot n+8, slot n+16, slot n+24, etc., i.e., every 8 slots is one PDCCH detection occasion. Within the same time length, the periods of the PDCCHs are different, so that the detection time of the PDCCHs is different, and the number of PDCCHs possibly detected by the terminal equipment is also different, so that the receiving time of the PDSCH scheduled by the PDCCHs is also different. In S210, the network device may indicate to the terminal device the detection opportunity of the dynamic change PDCCH through the indication information. Dynamically changing the detection timing of the PDCCH may be understood as the period of the PDCCH or the detection timing is changed. For example, in some scenarios, the indication information may indicate a smaller PDCCH period in the period set of PDCCHs, according to which the network device may transmit the PDCCH to the terminal device. In other scenarios, the indication information may indicate a larger PDCCH period in the period set of PDCCHs, according to which the network device may send the PDCCH to the terminal device. Each PDCCH is used to schedule transmission of PDSCH. When the transmission period of the PDCCH needs to be changed, the network equipment can send the indication information to the terminal equipment, wherein the indication information is used for indicating to dynamically change the detection time or period of the PDCCH.

In S220. The terminal device determines candidate PDSCH receiving opportunities corresponding to the harq_acks sent on the first PUCCH resources according to the detection opportunities of the PDCCH indicated by the indication information and the first set of slot offset values, and in combination with the K1 set. The first set of slot offset values includes slot offset values for indicating slot offset values between PDCCH and PDSCH. The first set of slot offset values may be understood as the K0 set described above. The K0 set may be preconfigured or predefined, including one or more K0. K0 is used to determine a time domain offset value between a slot in which a PDCCH is located and a PDSCH scheduled by the PDCCH. The K1 set may be preconfigured or predefined. The K1 set includes a slot offset value for indicating a slot in which a PUCCH resource transmitting harq_ack is located and a slot offset value of a PDSCH corresponding to the harq_ack. The K1 set may be a second set of slot offset values described below. For example, assuming that the K0 set is {1,2,3}, the slot in which the PDCCH is located is slot n, and the slot position where the PDSCH scheduled by the PDCCH may occur is slot n+1, slot n+2, or slot n+3. The time slot in which the PDSCH scheduled by the PDCCH finally occurs is determined by a certain K0 indicated in the PDCCH. The PDCCH may also indicate a time domain resource position of the PDSCH in a certain slot. For example, the PDCCH may indicate a certain row shown in table 1 above, and thus a time slot in which the PDSCH scheduled by the PDCCH is located and a time domain resource location in the time slot may be determined. The PDCCH may further indicate a certain K1 value, where the K1 value indicates a slot offset value of a slot where the PDCCH is located and a slot where the first PUCCH resource is located. The terminal device may determine, according to the K1 value, a slot in which the first PUCCH resource is located. The terminal device may determine all possible candidate PDSCH receiving opportunities corresponding to the harq_ack transmitted on the first PUCCH resource according to the K1 set and the timeslot where the first PUCCH resource is located, and then determine the candidate PDSCH receiving opportunity corresponding to the harq_ack transmitted on the first PUCCH resource from all determined possible candidate PDSCH receiving opportunities according to the detection opportunity of the PDCCH and the first timeslot offset value set. Since the candidate PDSCH reception opportunity is determined according to the detection opportunity of the PDCCH and the first set of slot offset values, the candidate PDSCH reception opportunity includes only PDSCH reception opportunities where PDCCH scheduling may occur, excluding PDSCH reception opportunities where PDCCH scheduling may not occur, and may also be referred to as PDSCH invalidation opportunities, i.e., the candidate PDSCH reception opportunities do not include PDSCH invalidation opportunities. Each candidate PDSCH reception occasion corresponds to a PDCCH detection occasion. The PDSCH reception timing corresponds to a dynamically changing PDCCH detection timing. The PDCCH detection timing is different, and the determined PDSCH reception timing is also different.

In S230, the terminal device determines a semi-static HARQ codebook of harq_acks transmitted on the first PUCCH according to the determined candidate PDSCH reception timing. Since the candidate PDSCH reception occasions do not include PDSCH nulling occasions, NACKs corresponding to PDSCH nulling occasions may be referred to as nulled NACK bits. And the semi-static HARQ codebook finally determined by the terminal equipment does not comprise invalid NACK bits.

According to the semi-static codebook generation method, the candidate PDSCH receiving time is determined according to the dynamically-changed PDCCH detection time and the first time slot offset value set. The candidate PDSCH reception occasions only include PDSCH reception occasions where PDCCH detection occasion scheduling may occur, avoiding that the candidate PDSCH reception occasions include PDSCH invalid occasions. According to the candidate PDSCH receiving time, the semi-static HARQ codebook is determined, and invalid NACK bits in the semi-static HARQ codebook can be reduced, so that the code rate of the semi-static HARQ codebook is improved, the expenditure of the PUCCH resource for feeding back the semi-static HARQ codebook is reduced, and the reliability of the semi-static HARQ codebook is improved. Especially, under the condition of larger PDCCH period, the reliability of the semi-static HARQ codebook can be improved to a great extent, and the communication efficiency is improved.

Optionally, in the embodiment of the present application, the network device may also determine, according to the detection opportunity of the PDCCH and the first set of slot offset values, a candidate PDSCH reception opportunity corresponding to the harq_ack received on the first PUCCH resource. And then determining a semi-static HARQ codebook received on the first PUCCH according to the candidate PDSCH receiving occasion. For specific procedures, reference may be made to the descriptions of S220 and S230, and for brevity, the description is omitted here.

Alternatively, as a possible implementation manner, the indication information may include: at least one of a search space set corresponding to the PDCCH, a detection period of the PDCCH, or the PDCCH detection skip information is activated or deactivated, wherein the search space set corresponding to the PDCCH includes the detection period of the PDCCH. The search space set corresponding to the PDCCH may include a period of the PDCCH.

Specifically, one or more search space sets may be preconfigured or defined for the PDCCH, or a plurality of PDCCH detection periods may be preconfigured or defined for the PDCCH, or a plurality of PDCCH detection skip (PDCCH monitor skipping) information (signals) may be preconfigured or defined for the PDCCH. One or more detection periods of the PDCCH may be included in each search space set. The network device may indicate activation or deactivation of the search space set corresponding to the PDCCH in the indication information. The search space set corresponding to the activated PDCCH may be understood as determining the detection opportunity of the PDCCH by using the PDCCH period included in the search space set corresponding to the activated PDCCH. The search space set corresponding to the deactivated PDCCH may be understood that the network device may not transmit the PDCCH using a PDCCH period included in the search space set corresponding to the deactivated PDCCH. And the terminal equipment can determine the detection time of the PDCCH according to the activated or deactivated search space set included in the indication information and the control resource set associated with the search space set. If one set of search spaces includes one or more periods of detection of PDCCHs and the set of search spaces is activated, further, the network device may also indicate which PDCCH period included in the activated set of search spaces to utilize. Optionally, the method comprises the steps of. For one search space set, the number of slots continuously detected in a period corresponding to each PDCCH detection period and/or the detection symbols of the PDCCH in the slot may also be configured. The terminal device may determine the detection timing of the PDCCH according to the number of slots continuously detected by the PDCCH in the period corresponding to each PDCCH detection period and/or the detection symbol of the PDCCH in the slot.

Optionally, the indication information may further include a certain PDCCH detection period of a plurality of PDCCH detection periods preconfigured or predefined for the PDCCH, and the terminal device may determine the detection timing of the PDCCH according to the PDCCH detection period indicated by the indication information. Alternatively, the indication information may further include PDCCH detection skip information, where the PDCCH detection skip information may understand a time interval between two adjacent PDCCH detections, for example, if the PDCCH detection skip information indicates that 5 slots are separated between two adjacent PDCCH detections, i.e. the period of the PDCCH is 5, assuming that the number of slots skipped by the PDCCH detection is 5. The terminal device may determine the detection timing of the PDCCH according to the content included in the indication information.

The terminal equipment determines the detection time of the PDCCH according to the content included in the indication information, so that the accuracy of the determined detection time of the PDCCH can be improved, and the efficiency of determining the detection time of the PDCCH is improved.

It should be understood that the indication information may include other information for determining the detection timing of the PDCCH in addition to the information for determining the detection timing of the PDCCH described above. For example, the indication information may directly indicate a detection timing of the PDCCH, or the like. In the embodiment of the application, the mode how the network equipment indicates the detection time of the PDCCH to the terminal equipment is not limited.

It should also be understood that the network device may also determine the detection timing of the PDCCH according to the information included in the above indication information for determining the detection timing of the PDCCH, or other information for determining the detection timing of the PDCCH.

As shown in fig. 6, fig. 6 is a schematic interaction diagram of a method of semi-static codebook generation in some embodiments of the present application, in some embodiments, the method 200 may further include S211 on the basis of the method steps shown in fig. 6.

S211, the terminal equipment determines a time unit set corresponding to the time slot where the first PUCCH resource is located according to a second time slot offset value set and the time slot where the first PUCCH resource is located, wherein the time slot offset value included in the second time slot offset value set is used for indicating the time slot where the first PUCCH resource is located and the time slot offset value of a time unit in the time unit set.

The S220 may include:

s221, the terminal equipment determines the candidate PDSCH receiving time in the time unit set according to the detecting time of the PDCCH and the first time slot offset value set.

The descriptions of S210 and S230 shown in fig. 6 may refer to the descriptions of S210 and S230 described above, and are not repeated here for brevity.

In S211, the terminal device may determine, according to the second set of slot offset values and the slot in which the first PUCCH resource is located, a set of time units corresponding to the slot in which the first PUCCH resource is located. The second set of slot offset values may be understood as the K1 set described above. The K1 set may be preconfigured or predefined. The K1 set includes a slot offset value for indicating a slot in which a PUCCH resource transmitting harq_ack is located and a slot offset value of a PDSCH corresponding to the harq_ack. For the first PUCCH resource, the K1 set may be used to indicate a slot in which the first PUCCH resource is located and a slot offset value of a time unit in the time unit set. A time unit is herein understood to be a time slot, i.e. the length of a time unit may be equal to a time slot. Or a time unit may be understood as a micro-slot or mini-slot, etc., i.e. a time slot may also comprise a plurality of time units. One time unit may correspond to one possible candidate PDSCH reception occasion, which may be a candidate PDSCH reception occasion with PDCCH scheduling or a PDSCH null occasion without PDCCH scheduling. For example, assuming that the K1 set is {1,2,3,4}, and the slot in which the first PUCCH resource is located is slot n, the time unit set corresponding to the slot in which the first PUCCH resource is located includes slot n-4, slot n-3, slot n-2, and slot n-1, and one slot is a time unit with one slot. For any one of slots n-4, n-3, n-2, and n-1, there may or may not be PDCCH-scheduled PDSCH. Namely, the PDSCH that may be inactive in time slot n-4, time slot n-3, time slot n-2, and time slot n-1. After the set of time units is determined, all possible candidate PDSCH reception opportunities are also determined.

S220 described above: according to the detection timing and the first time slot offset value set of the PDCCH, determining the candidate PDSCH receiving timing corresponding to the harq_ack sent on the first PUCCH resource may include:

s221, determining the candidate PDSCH receiving time in the time unit set according to the detection time of the PDCCH and the first time slot offset value set.

Specifically, after the time cell set is determined, the time cells of the PDSCH that cannot be scheduled by the PDCCH may be removed from the time cell set according to the detection timing of the PDCCH and the first time slot offset value set. For example, for a certain time unit in the time unit set, according to the first time slot offset value set, the time slot in which the time unit is located is calculated forward, and if one or more PDCCH detection occasions exist in the time slot in which the time unit is located, there may be a PDSCH scheduled by the PDCCH in the time unit, that is, the time unit may be regarded as a candidate PDSCH reception occasion. If, for a certain time unit in the time unit set, it is deduced forward from the time slot in which the time unit is located that no PDCCH detection opportunity exists in one or more time slots, there is no possibility that there is a PDSCH scheduled by the PDCCH in the time unit, the time unit may be regarded as a PDSCH invalidating opportunity, and the time unit needs to be excluded. And eliminating invalid PDSCH invalid occasions in the time unit set, and obtaining the remaining time units as candidate PDSCH receiving occasions.

Optionally, the method comprises the steps of. Besides determining the candidate PDSCH receiving time in the above-mentioned time unit set by using the detection time and the first time slot offset value set of the PDCCH, further, if the TDD communication system is used for PDSCH transmission, it is also required to ensure that at least one PDSCH time domain resource in one or more candidate PDSCH time domain resources corresponding to each candidate PDSCH receiving time is a downlink symbol. That is, it is also required to ensure that at least one PDSCH time domain resource in the PDSCH time domain resources corresponding to each candidate PDSCH reception opportunity can transmit PDSCH. Each PDSCH reception occasion may correspond to one or more candidate PDSCH time domain resources. For example, in the example shown in table 1, each PDSCH reception occasion may correspond to at least 4 resource allocation indices, each corresponding to a different PDSCH time domain resource (i.e., SLIV). That is, each PDSCH reception opportunity at least corresponds to the PDSCH time domain resources in 4, and it is required to ensure that the symbols included in at least one PDSCH time domain resource in the PDSCH time domain resources are downlink symbols.

The following will explain with reference to the example shown in fig. 7. Fig. 7 is a schematic diagram illustrating determining candidate PDSCH reception opportunities according to the second set of slot offset values, the first set of slot offset values, and the PDCCH detection opportunities.

In fig. 7, it is assumed that the PDCCH detection period is 4 slots, the K1 set (second slot offset value set) is {1,2,3,4,5,6,7,8}, the K0 set (first slot offset value set) is {1,2}, and the slot in which the first PUCCH resource is located is slot n+8. The time unit set corresponding to the time slot where the first PUCCH resource is located according to the second time slot offset value set and the time slot where the first PUCCH resource is located includes: the 8 slots, slot n through slot n +7, each can be considered a unit of time. The first PDCCH detection opportunity in the 8 slots is assumed to be in slot n+1, and the second PDCCH detection opportunity is assumed to be in slot n+5. First, among 8 time units of time slots n to n+7, a time unit in which PDSCH scheduled by PDCCH is not possible is determined for each time unit from K0 set. For example, for time slot n+7, in combination with the K0 set, the time slots in which the determined PDCCH detection opportunity may exist are time slot n+5 and time slot n+6. If there is only a PDCCH detection opportunity on any one of the slots n+5 and n+6, the slot n+7 is a candidate PDSCH reception opportunity. If there is no PDCCH detection opportunity on both slots n+5 and n+6, then slot n+7 is not a candidate PDSCH reception opportunity and slot n+7 may be considered a PDSCH null opportunity. And the second PDCCH detection opportunity is located in time slot n+5, proving that time slot n+7 is a candidate PDSCH reception opportunity. By a similar method, it is determined whether the time units of time slots n to n+6 are candidate PDSCH reception opportunities in turn. The finally determined candidate PDSCH receiving opportunities comprise: the four time slots of the time slot n+2, the time slot n+3, the time slot n+6 and the time slot n+7 are candidate PDSCH receiving opportunities. It is assumed that only one PDSCH can be scheduled per slot and that only 1 bit ACK/NACK is fed back for each PDSCH. Only 4 bits are needed for the semi-static HARQ codebook of harq_acks transmitted on the first PUCCH according to the determined candidate PDSCH reception occasions, and all of the 4-bit codebooks correspond to candidate PDSCH reception occasions that may have PDCCH scheduling. If one or more of the four candidate PDSCH reception opportunities does not actually receive PDSCH, one or more NACK bits are padded in the corresponding positions of the semi-static HARQ codebook. For a candidate PDSCH reception occasion of the four candidate PDSCH reception occasions, where the PDSCH is actually received finally, corresponding one or more HARQ-ACK bits are generated according to one or two transport blocks (transmission block, TB) corresponding to the scheduled PDSCH, or according to decoding errors of one or more Code Block Groups (CBGs) corresponding to the scheduled PDSCH.

Optionally, if the transmission of the PDSCH uses a TDD communication system, it is further required to determine that at least one PDSCH time domain resource of one or more candidate PDSCH time domain resources corresponding to each candidate PDSCH receiving opportunity is a downlink symbol in four candidate PDSCH receiving opportunities, namely, slot n+2, slot n+3, slot n+6, and slot n+7. If one or more candidate PDSCH reception opportunities of the four candidate PDSCH reception opportunities do not meet the above conditions, then candidate PDSCH reception opportunities that do not meet the above conditions need to be excluded from the four candidate PDSCH reception opportunities, and the remaining candidate PDSCH reception opportunities that meet the conditions are candidate PDSCH reception opportunities corresponding to the semi-static HARQ codebook that is finally transmitted on the first PUCCH.

It should be appreciated that in the example shown in fig. 7, only 1-bit ACK/NACK per candidate PDSCH reception occasion needs to be fed back, assuming that only one PDSCH is scheduled per slot. If more than one PDSCH can be scheduled for one slot and/or more than 1 bit of n-bit ACK/NACK needs to be fed back for one candidate PDSCH reception occasion, then n-bit NACK is filled in the corresponding HARQ-ACK feedback for occasin located in the same slot or in different slots in the candidate PDSCH reception occasion.

According to the method for generating the semi-static codebook, firstly, a time unit set corresponding to a time slot where a first PUCCH resource is located is determined according to a second time slot offset value set and the time slot where the first PUCCH resource is located, each time unit included in the time unit set can be regarded as a possible candidate PDSCH receiving opportunity, and then, according to the detecting opportunity of the PDCCH and the first time slot offset value set, the time unit (or can be called as an invalid time unit) which cannot be scheduled by the PDCCH is excluded from the time unit set. Or excluding time units which cannot be scheduled by the PDCCH and time units which comprise time domain resources which do not meet the requirement of downlink transmission in the time unit set. And excluding the time units which do not meet the condition, wherein the remaining time units are candidate PDSCH receiving opportunities. Therefore, the phenomenon that the candidate PDSCH receiving time comprises the PDSCH invalid time is avoided, the semi-static HARQ codebook is determined according to the candidate PDSCH receiving time, invalid NACK bits in the semi-static HARQ codebook can be reduced, the code rate of the semi-static HARQ codebook is improved, the expenditure of the PUCCH resource for feeding back the semi-static HARQ codebook is reduced, and the reliability of the semi-static HARQ codebook is improved.

It should be understood that the network device may also determine, according to the second set of slot offset values and the slot in which the first PUCCH resource is located, a set of time units corresponding to the slot in which the first PUCCH resource is located. And then determining the candidate PDSCH receiving opportunity in the time unit set according to the detection opportunity of the PDCCH and the first time slot offset value set. For a specific description, reference may be made to the descriptions of S211 and S221, which are not repeated herein for brevity.

Optionally, in some possible implementations of the present application, the PDCCH corresponding to the PDCCH detection occasion carries DCI, and the DCI is used for scheduling a unicast PDSCH. The PDSCH of the unicast type may be understood as a PDSCH transmitted to a certain or a single terminal device, and the terminal device needs NACK/ACK feedback for the PDSCH after receiving the PDSCH of the unicast type.

Alternatively, the DCI for scheduling the PDSCH of the unicast type may be scrambled corresponding to the cell radio temporary network identity (cell radio network temporary identifier, C-RNTI), i.e. the cyclic redundancy check (cyclic redundancy check, CRC) of the DCI for scheduling the PDSCH of the unicast type is scrambled with the C-RNTI. Alternatively, the DCI for scheduling the PDSCH of the unicast type may be scrambled with the modulation and coding scheme cell radio network temporary identity (modulation coding scheme cell radio network temporary identifier, MCS-C-RNTI), i.e., the CRC of the DCI for scheduling the PDSCH of the unicast type may also be scrambled with the MCS-C-RNTI. Alternatively, the DCI for scheduling the PDSCH of the unicast type may be correspondingly configured with the scheduling radio network temporary identifier scrambling (Configured Scheduling radio network temporary identifier, CS-RNTI), that is, the CRC of the DCI for scheduling the PDSCH of the unicast type may be scrambled with the CS-RNTI. When the terminal device detects that DCI carried by the PDCCH is scrambled by using several RNTIs, the terminal device may determine that the PDCCH schedules a PDSCH of a unicast type. Further, a candidate PDSCH reception opportunity may be determined according to the detection opportunity of the PDCCH and the first set of slot offset values, and a semi-static HARQ codebook may be generated according to the candidate PDSCH reception opportunity. The PDSCH of the semi-static HARQ codebook corresponding to the non-unicast type is avoided, the reliability of the semi-static HARQ codebook can be improved, and the expenditure of the PUCCH resource for feeding back the semi-static HARQ codebook is reduced.

It should be understood that scrambling of other types of RNTIs may be used for DCI scheduling a PDSCH of a unicast type, in addition to scrambling of DCI scheduling a PDSCH of a unicast type using several RNTIs as described above. The embodiment of the application does not limit the RNTI scrambling the DCI for scheduling the unicast type PDSCH.

Optionally, in some possible implementations of the present application, the number of slot offset values included in the second set of slot offset values is less than or equal to 4.

For example, the second set of slot offset values may be pre-configured or pre-defined, the pre-configured or pre-defined second set of slot offset values comprising a number of slot offset values may be less than a threshold, e.g., the threshold may be 4,

or 2, or 3, etc. Optionally, the threshold is less than 8.

For example, the second set of slot offset values may be {1} or {2} or {3} or {4} or {5} or {6} or {7} or {8}.

For another example, the second set of slot offset values may be {1,2}, or {3,4}, or {5,6}, or {7,8}.

For another example, the second set of slot offset values may be {1,2,3}, or {3,4,5}, or {6,7,8}.

For another example, the second set of slot offset values may be {4,8}, or {3,7}, or {2,6}, or {7,8}.

For another example, the second set of slot offset values may be {1,3,5,7}, or {2,4,6,8}.

Alternatively, the network device may use some fields in the DCI carried by the PDCCH to indicate to the terminal device which slot offset value the second set of slot offset values is pre-configured or predefined to include. For example, assuming that the second set of slot offset values is {4,8}, it is possible to use "PDSCH to HARQ feedback timing" in DCI where the most significant bit in the 3-bit indication field is 0, the indicated slot offset value is 4, and where the most significant bit is 1, the indicated K1 is 8. The remaining two bits of the indication field have no indication meaning. For the case where the second set of slot offset values includes the other two slot offset values, a similar method may also be used to indicate to the terminal device which slot offset value corresponds to the PDCCH.

For another example, assuming that the second set of slot offset values is {2,4,6,8}, when the most significant two bits in the 3-bit indication field of "PDSCH to HARQ feedback timing" in the DCI are 00, the indicated slot offset value is 2, when the most significant two bits are 01, the indicated slot offset value is 4, when the most significant two bits are 10, the indicated slot offset value is 6, and when the most significant two bits are 11, the indicated slot offset value is 8. The remaining one bit of the indication field has no indication meaning. In case the second set of slot offset values comprises the other 4 slot offset values, a similar approach may be used to indicate to the terminal equipment which slot offset value is specifically used.

According to the method for generating the semi-static codebook, the number of the time slot offset values included in the second time slot offset value set is limited, and the number of bits of the semi-static HARQ codebook can be reduced on the basis of reducing the invalid NACK bits in the semi-static HARQ codebook. The reliability of the semi-static HARQ codebook is further improved.

It should be appreciated that the number of elements included for the second set of slot offset values and the value of each element described above are exemplary only. No limitation should be imposed on the number of slot offset values and the value of slot offset values included in the second slot offset value set in the present application. For example, the number of slot offset values included in the second slot offset value set may be 5 or the like.

It should also be understood that, in addition to indicating to the terminal device which slot offset value the second set of slot offset values includes that the slot offset value corresponding to the PDCCH is preconfigured or predefined by using some fields in the DCI described above, the network device may also notify the terminal device which slot offset value the second set of slot offset values includes that the slot offset value corresponding to the PDCCH is preconfigured or predefined by other means. For example, the network device may notify the terminal device of a slot offset value or the like corresponding to the PDCCH through the configuration information.

In the embodiment of the application, the pre-configuration may include a network device configured through higher layer signaling and physical layer signaling. The higher layer signaling in the present application may include, for example, radio resource control signaling (radio resource control, RRC), medium access control (medium access control, MAC) Control Element (CE), radio link control (radio link control, RLC) signaling, etc., and the physical layer signaling may include, for example, DCI, etc.

Optionally, in some possible implementations of the present application, the indication information is further used to indicate that the harq_ack adopts a semi-static HARQ codebook. After receiving the indication information, the terminal equipment can determine that the semi-static HARQ codebook needs to be generated.

It should be understood that the above indication information may also be notified to the terminal device by higher layer signaling or physical layer signaling.

It should be understood that in various embodiments of the application, first, second, etc. are merely intended to represent that the plurality of objects are different. For example, the first set of slot offset values and the second set of slot offset values are only intended to represent different sets of slot offset values. Without any effect on the set of slot offset values itself and the number of slot offset values involved, etc., and the first, second, etc. described above should not be limiting on the embodiments of the present application.

It should also be understood that the manner, the case, the category, and the division of the embodiments in the embodiments of the present application are merely for convenience of description, should not be construed as a particular limitation, and the features in the various manners, the categories, the cases, and the embodiments may be combined without contradiction.

It should also be understood that the various numbers referred to in the embodiments of the present application are merely for descriptive convenience and are not intended to limit the scope of the embodiments of the present application. The sequence numbers of the above-mentioned processes do not mean the sequence of execution sequence, and the execution sequence of each process should be determined by its functions and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present application.

It should also be understood that the above is only intended to assist those skilled in the art in better understanding the embodiments of the present application, and is not intended to limit the scope of the embodiments of the present application. Various equivalent modifications and variations will be apparent to those skilled in the art from the foregoing examples, as well as, for example, certain steps of the method 200 described above may not be necessary, or certain steps may be newly added, etc. Or a combination of any two or more of the above. Such modifications, variations, or combinations are also within the scope of embodiments of the present application.

It should also be understood that the foregoing description of embodiments of the present application focuses on highlighting differences between the various embodiments and that the same or similar elements not mentioned may be referred to each other and are not repeated herein for brevity.

It should also be understood that in the embodiments of the present application, the "predefined" may be implemented by pre-storing corresponding codes, tables or other manners that may be used to indicate relevant information in devices (including, for example, terminal devices and network devices), and the present application is not limited to the specific implementation manner thereof.

The method for generating the semi-static codebook according to the embodiment of the present application is described in detail above with reference to fig. 1 to 7. The following describes the communication device according to the embodiment of the present application in detail with reference to fig. 8 to 13.

Fig. 8 shows a schematic block diagram of a communication apparatus 300 according to an embodiment of the present application, where the apparatus 300 may correspond to the terminal device described in the method 200, or may be a chip or a component applied to the terminal device, and each module or unit in the apparatus 300 is used to perform each action or process performed by the terminal device in the method 200, respectively, as shown in fig. 8, and the communication apparatus 300 may include: a communication unit 310 and a processing unit 320.

A communication unit 310, configured to receive indication information from a network device, where the indication information is used to dynamically change a detection timing of a physical downlink control channel PDCCH;

a processing unit 320, configured to determine, according to a detection timing of the PDCCH and a first set of slot offset values, a candidate physical downlink shared channel PDSCH reception timing corresponding to a hybrid automatic repeat request acknowledgement harq_ack sent on a first physical uplink control channel PUCCH resource, where the PDCCH is used for scheduling transmission of the PDSCH, and the first set of slot offset values includes a slot offset value used for indicating a slot offset value between the PDCCH and the PDSCH;

the processing unit 320 is further configured to: and determining a semi-static HARQ codebook of the HARQ-ACK transmitted on the first PUCCH according to the candidate PDSCH receiving occasion.

The application provides a communication device, wherein a candidate PDSCH receiving time determined by the communication device is determined according to a dynamically changing PDCCH detection time and a first time slot offset value set. The candidate PDSCH reception occasions only include PDSCH reception occasions where PDCCH detection occasion scheduling may occur, avoiding that the candidate PDSCH reception occasions include PDSCH invalid occasions. According to the candidate PDSCH receiving opportunity, the semi-static HARQ codebook is determined, and invalid NACK bits in the semi-static HARQ codebook can be reduced, so that the code rate of the semi-static HARQ codebook is improved, the expenditure of the PUCCH resource for feeding back the semi-static HARQ codebook is reduced, the reliability of the semi-static HARQ codebook is improved, and the communication efficiency is improved.

Optionally, in some possible implementations of the present application, the indication information includes:

at least one of a search space set corresponding to the PDCCH, a detection period of the PDCCH or the PDCCH detection skip information is activated or deactivated, wherein the search space set corresponding to the PDCCH comprises the detection period of the PDCCH; the processing unit 320 is further configured to: and determining the detection time of the PDCCH according to the indication information.

Optionally, in some possible implementations of the present application, the processing unit 320 is specifically configured to: determining a time unit set corresponding to the time slot where the first PUCCH resource is located according to a second time slot offset value set and the time slot where the first PUCCH resource is located, wherein the time slot offset value included in the second time slot offset value set is used for indicating the time slot where the first PUCCH resource is located and the time slot offset value of a time unit in the time unit set; and determining the candidate PDSCH receiving opportunity in the time unit set according to the detection opportunity of the PDCCH and the first time slot offset value set.

Optionally, in some possible implementations of the present application, the PDCCH carries downlink control information DCI, where the DCI is used to schedule a PDSCH of unicast type.

Optionally, in some possible implementations of the present application, the DCI is scrambled corresponding to a cell radio network temporary identifier C-RNTI, or to a modulation coding scheme cell radio network temporary identifier MCS-C-RNTI, or to a configuration scheduling radio network temporary identifier CS-RNTI.

Optionally, in some possible implementations of the present application, the number of slot offset values included in the second set of slot offset values is less than or equal to 3.

Optionally, in some possible implementations of the present application, at least one candidate PDSCH time domain resource in the one or more candidate PDSCH time domain resources corresponding to the candidate PDSCH reception opportunity is a downlink symbol.

Optionally, in some possible implementations of the present application, the indication information is further used to indicate that the harq_ack adopts a semi-static HARQ codebook.

It should be understood that, for the specific process of each unit in the apparatus 300 to execute the above corresponding steps, reference is made to the foregoing descriptions related to the terminal device in the embodiment shown in fig. 5 and fig. 6 and the related embodiment in the method 200, and for brevity, details are not repeated herein.

Alternatively, the communication unit 310 may comprise a receiving unit (module) and a transmitting unit (module) for performing the steps of receiving information and transmitting information by the terminal device in the embodiments of the method 200 described above and in the embodiments shown in fig. 5 and 6. Optionally, the communication device 300 may further comprise a storage unit 330 for storing instructions to be executed by the processing unit 320 and the communication unit 310. The communication unit 310, the processing unit 320 and the storage unit 330 are in communication connection, the storage unit 330 stores instructions, the processing unit 320 is used for executing the instructions stored in the storage unit 330, and the communication unit 310 is used for executing specific signal transceiving under the driving of the processing unit 320.

It should be appreciated that the communication unit 310 may be a transceiver, an input/output interface, or an interface circuit. The storage unit 330 may be a memory. The processing unit 320 may be implemented by a processor. As shown in fig. 9, the communication device 400 may include a processor 410, a memory 420, and a transceiver 430.

The communication device 300 shown in fig. 8 or the communication device 400 shown in fig. 9 is capable of implementing the steps performed by the terminal device in the embodiments of the method 200 described above and in the embodiments shown in fig. 5 and 6. Similar descriptions can be made with reference to the descriptions in the corresponding methods previously described. In order to avoid repetition, a description thereof is omitted.

The communication apparatus 300 shown in fig. 8 or the communication apparatus 400 shown in fig. 9 may be a terminal device.

Fig. 10 shows a schematic block diagram of a communication apparatus 500 according to an embodiment of the present application, where the apparatus 500 may correspond to the network device described in the method 200, or may be a chip or a component applied to the network device, and each module or unit in the apparatus 500 is configured to perform each action or process performed by the network device in the method 200, respectively, as shown in fig. 10, where the communication apparatus 500 may include:

the communication unit 510, as well as sending indication information to the terminal device, is configured to dynamically change the detection timing of the physical downlink control channel PDCCH.

A processing unit 520, configured to determine, according to a detection timing of the PDCCH and a first set of slot offset values, a candidate physical downlink shared channel PDSCH reception timing corresponding to a hybrid automatic repeat request acknowledgement harq_ack received on a first physical uplink control channel PUCCH resource, where the PDCCH is used for scheduling transmission of the PDSCH, and the first set of slot offset values includes a slot offset value used for indicating a slot offset value between the PDCCH and the PDSCH.

The processing unit 520 is further configured to: and determining a semi-static HARQ codebook of the HARQ-ACK received on the first PUCCH resource according to the candidate PDSCH receiving occasion.

The application provides a communication device, wherein a candidate PDSCH receiving time determined by the communication device is determined according to a dynamically changing PDCCH detection time and a first time slot offset value set. The candidate PDSCH reception occasions only include PDSCH reception occasions where PDCCH detection occasion scheduling may occur, avoiding that the candidate PDSCH reception occasions include PDSCH invalid occasions. And determining the semi-static HARQ codebook according to the candidate PDSCH receiving time, and reducing invalid NACK bits in the semi-static HARQ codebook, thereby improving the code rate of the semi-static HARQ codebook and improving the reliability of the semi-static HARQ codebook.

at least one of a search space set corresponding to the PDCCH, a detection period of the PDCCH, or the PDCCH detection skip information is activated or deactivated, wherein the search space set corresponding to the PDCCH includes the detection period of the PDCCH.

Optionally, in some possible implementations of the present application, the processing unit 520 is specifically configured to:

determining a time unit set corresponding to the time slot where the first PUCCH resource is located according to a second time slot offset value set and the time slot where the first PUCCH resource is located, wherein the time slot offset value included in the second time slot offset value set is used for indicating the time slot where the first PUCCH resource is located and the time slot offset value of a time unit in the time unit set; and determining the candidate PDSCH receiving opportunity in a time unit set according to the detection opportunity of the PDCCH and the first time slot offset value set.

It should be understood that, for the specific process of each unit in the apparatus 500 to perform the above corresponding steps, reference is made to the foregoing description related to the network device in connection with the embodiment shown in fig. 5 and the related embodiment in the method 200, and for brevity, a detailed description is omitted here.

Alternatively, the communication unit 510 may comprise a receiving unit (module) and a transmitting unit (module) for performing the steps of receiving information and transmitting information by the network device in the embodiments of the method 200 described above and in the embodiments shown in fig. 5 and 6. Optionally, the communication device 500 may further comprise a storage unit 530 for storing instructions to be executed by the processing unit 520 and the communication unit 510. The communication unit 510, the processing unit 520, and the storage unit 530 are communicatively connected, the storage unit 530 stores instructions, the processing unit 520 is configured to execute the instructions stored in the storage unit 530, and the communication unit 510 is configured to perform specific signal transceiving under the driving of the processing unit 520.

It should be appreciated that the communication unit 510 may be a transceiver, an input/output interface, or interface circuitry. The storage unit 530 may be a memory. The processing unit 520 may be implemented by a processor. As shown in fig. 11, the communication device 600 may include a processor 510, a memory 520, and a transceiver 530.

The communications apparatus 500 shown in fig. 10 or the communications apparatus 600 shown in fig. 11 can implement the steps performed by the network device in the embodiments of the method 200 described above and the embodiments shown in fig. 5 and 6. Similar descriptions can be made with reference to the descriptions in the corresponding methods previously described. In order to avoid repetition, a description thereof is omitted.

The communication apparatus 500 shown in fig. 10 or the communication apparatus 600 shown in fig. 11 may be a network device.

It should also be understood that the division of the units in the above apparatus is merely a division of a logic function, and may be fully or partially integrated into a physical entity or may be physically separated. And the units in the device can be all realized in the form of software calls through the processing element; or can be realized in hardware; it is also possible that part of the units are implemented in the form of software, which is called by the processing element, and part of the units are implemented in the form of hardware. For example, each unit may be a processing element that is set up separately, may be implemented as integrated in a certain chip of the apparatus, or may be stored in a memory in the form of a program, and the functions of the unit may be called and executed by a certain processing element of the apparatus. The processing element, which may also be referred to herein as a processor, may be an integrated circuit with signal processing capabilities. In implementation, each step of the above method or each unit above may be implemented by an integrated logic circuit of hardware in a processor element or in the form of software called by a processing element.

In one example, the unit in any of the above apparatuses may be one or more integrated circuits configured to implement the above methods, for example: one or more application specific integrated circuits (application specific integrated circuit, ASIC), or one or more digital signal processors (digital signal processor, DSP), or one or more field programmable gate arrays (field programmable gate array, FPGA), or a combination of at least two of these integrated circuit forms. For another example, when the units in the apparatus may be implemented in the form of a scheduler of processing elements, the processing elements may be general-purpose processors, such as a central processing unit (central processing unit, CPU) or other processor that may invoke the program. For another example, the units may be integrated together and implemented in the form of a system-on-a-chip (SOC).

Fig. 12 shows a schematic structural diagram of a terminal device according to an embodiment of the present application. Which may be the terminal device in the above embodiment, for implementing the operation of the terminal device in the above embodiment. As shown in fig. 12, the terminal device includes: antenna 710, radio frequency device 720, baseband device 730. The antenna 710 is connected to a radio frequency device 720. In the downlink direction, the radio frequency device 720 receives information sent by the network device through the antenna 710, and sends the information sent by the network device to the baseband device 730 for processing. In the uplink direction, the baseband device 730 processes information of the terminal device and sends the processed information to the radio frequency device 720, and the radio frequency device 720 processes information of the terminal device and sends the processed information to the network device through the antenna 710.

Baseband apparatus 730 may include a modem subsystem for implementing processing of the various communication protocol layers of data; the system also comprises a central processing subsystem for realizing the processing of the terminal operating system and the application layer; in addition, other subsystems, such as a multimedia subsystem for implementing control of a terminal device camera, screen display, etc., a peripheral subsystem for implementing connection with other devices, etc., may be included. The modem subsystem may be a stand-alone chip. Alternatively, the above means for the terminal may be located in the modem subsystem.

The modem subsystem may include one or more processing elements 731, including, for example, a host CPU and other integrated circuits. In addition, the modulation and demodulation subsystem may also include a storage element 732 and an interface circuit 733. The storage element 732 is used to store data and programs, but the programs used to perform the methods performed by the terminal device in the above methods may not be stored in the storage element 732, but in a memory outside the modulation and demodulation subsystem. The interface circuit 733 is used to communicate with other subsystems. The above means for a terminal device may be located in a modem subsystem which may be implemented by a chip comprising at least one processing element for performing the steps of any of the methods performed by the above terminal device and interface circuitry for communicating with other means. In one implementation, the unit of the terminal device implementing each step in the above method may be implemented in the form of a processing element scheduler, for example, the apparatus for a terminal device includes a processing element and a storage element, and the processing element invokes the program stored in the storage element to perform the method performed by the terminal in the above method embodiment. The memory element may be a memory element where the processing element is on the same chip, i.e. an on-chip memory element.

In another implementation, the program for executing the method executed by the terminal device in the above method may be a storage element on a different chip than the processing element, i.e. an off-chip storage element. At this time, the processing element calls or loads a program from the off-chip storage element on the on-chip storage element to call and execute the method executed by the terminal in the above method embodiment.

In yet another implementation, the unit of the terminal device implementing the steps of the above method may be configured as one or more processing elements, which are disposed on the modem subsystem, where the processing elements may be integrated circuits, for example: one or more ASICs, or one or more DSPs, or one or more FPGAs, or a combination of these types of integrated circuits. These integrated circuits may be integrated together to form a chip.

The units of the terminal device implementing the steps of the above method may be integrated together and implemented in the form of a system-on-a-chip (SOC) chip for implementing the above method.

Fig. 13 is a schematic structural diagram of a network device according to an embodiment of the present application. For implementing the operations of the network device in the above embodiments. As shown in fig. 13, the network device includes: an antenna 801, a radio frequency device 802, and a baseband device 803. The antenna 801 is connected to a radio frequency device 802. In the uplink direction, the radio frequency device 802 receives information transmitted from the terminal via the antenna 801, and transmits information transmitted from the terminal device to the baseband device 803 for processing. In the downlink direction, the baseband device 803 processes information of the terminal and sends the processed information to the radio frequency device 802, and the radio frequency device 802 processes information of the terminal equipment and sends the processed information to the terminal through the antenna 801.

The baseband apparatus 803 may include one or more processing elements 8031, including, for example, a master CPU and other integrated circuits. In addition, the baseband device 803 may further include a storage element 8032 and an interface 8033, the storage element 8032 being used for storing programs and data; the interface 8033 is used to interact with the radio frequency device 802, for example, a common public radio interface (common public radio interface, CPRI). The above means for network device may be located in the baseband means 803, e.g. the above means for network device may be a chip on the baseband means 803 comprising at least one processing element for performing the steps of any one of the methods performed by the above network device and interface circuitry for communicating with other means. In one implementation, the units of the network device implementing the steps in the above method may be implemented in the form of a processing element scheduler, for example, an apparatus for a network device includes a processing element and a storage element, where the processing element invokes the program stored in the storage element to perform the method performed by the network device in the above method embodiment. The memory elements may be memory elements on the same chip as the processing elements, i.e., on-chip memory elements, or may be memory elements on a different chip than the processing elements, i.e., off-chip memory elements.

In another implementation, the units of the network device implementing the steps of the above method may be configured as one or more processing elements, which are disposed on the baseband apparatus, where the processing elements may be integrated circuits, for example: one or more ASICs, or one or more DSPs, or one or more FPGAs, or a combination of these types of integrated circuits. These integrated circuits may be integrated together to form a chip.

The units of the network device implementing the steps of the above method may be integrated together and implemented in the form of a system on a chip, e.g. the baseband device comprises the SOC chip for implementing the above method.

The terminal device and the network device in the above-described respective apparatus embodiments may correspond completely to the terminal device or the network device in the method embodiments, and the respective steps are performed by respective modules or units, for example, when the apparatus is implemented in a chip, the receiving unit may be an interface circuit of the chip for receiving signals from other chips or apparatuses. The above unit for transmitting is an interface circuit of the device for transmitting signals to other devices, for example, when the device is implemented in the form of a chip, the transmitting unit is an interface circuit of the chip for transmitting signals to other chips or devices.

The embodiment of the application also provides a communication system, which comprises: the terminal device and the network device.

Embodiments of the present application also provide a computer readable medium storing a computer program code comprising instructions for performing the method of semi-static codebook generation of the embodiments of the present application in the method 200 described above. The readable medium may be read-only memory (ROM) or random access memory (random access memory, RAM), to which embodiments of the application are not limited.

The present application also provides a computer program product comprising instructions which, when executed, cause the terminal device and the network device to perform operations of the terminal device and the network device corresponding to the above method.

The embodiment of the application also provides a system chip, which comprises: a processing unit, which may be, for example, a processor, and a communication unit, which may be, for example, an input/output interface, pins or circuitry, etc. The processing unit may execute computer instructions to cause a chip within the communication device to perform any of the methods of semi-static codebook generation provided by the embodiments of the present application described above.

Optionally, the computer instructions are stored in a storage unit.

Alternatively, the storage unit is a storage unit in the chip, such as a register, a cache, etc., and the storage unit may also be a storage unit in the terminal located outside the chip, such as a ROM or other type of static storage device, a RAM, etc., that can store static information and instructions. The processor mentioned in any of the above may be a CPU, a microprocessor, an ASIC, or one or more integrated circuits for controlling the execution of the program of the above-mentioned feedback information transmission method. The processing unit and the storage unit may be decoupled and respectively disposed on different physical devices, and the respective functions of the processing unit and the storage unit are implemented by wired or wireless connection, so as to support the system chip to implement the various functions in the foregoing embodiments. Alternatively, the processing unit and the memory may be coupled to the same device.

It will be appreciated that the memory in embodiments of the application may be volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile memory may be a ROM, a Programmable ROM (PROM), an erasable programmable EPROM (EPROM), an electrically erasable programmable EPROM (EEPROM), or a flash memory, among others. The volatile memory may be RAM, which acts as external cache. There are many different types of RAM, such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), and direct memory bus RAM (DR RAM).

The terms "system" and "network" are often used interchangeably herein. The term "and/or" is herein merely an association relationship describing an associated object, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

The terms "upstream" and "downstream" as used herein are used to describe the direction of data/information transmission in a specific scenario, for example, the "upstream" direction generally refers to the direction in which data/information is transmitted from a terminal to a network side, or the direction in which a distributed unit is transmitted to a centralized unit, and the "downstream" direction generally refers to the direction in which data/information is transmitted from a network side to a terminal, or the direction in which a centralized unit is transmitted to a distributed unit.

Various objects such as various messages/information/devices/network elements/systems/devices/actions/operations/processes/concepts may be named in the present application, and it should be understood that these specific names do not constitute limitations on related objects, and that the named names may be changed according to the scenario, context, or usage habit, etc., and understanding of technical meaning of technical terms in the present application should be mainly determined from functions and technical effects that are embodied/performed in the technical solution.

In various embodiments of the application, where no special description or logic conflict exists, terms and/or descriptions between the various embodiments are consistent and may reference each other, and features of the various embodiments may be combined to form new embodiments based on their inherent logic.

The methods in embodiments of the present application may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instructions are loaded and executed on a computer, the processes or functions of embodiments of the present application are performed in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer program or instructions may be stored in or transmitted across a computer-readable storage medium. The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server that integrates one or more available media.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.

In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk, etc.

The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method of semi-static codebook generation, comprising:

receiving indication information from network equipment, wherein the indication information is used for dynamically changing the detection time of a Physical Downlink Control Channel (PDCCH);

determining candidate Physical Downlink Shared Channel (PDSCH) receiving time corresponding to hybrid automatic repeat request acknowledgement (HARQ_ACK) sent on a first Physical Uplink Control Channel (PUCCH) resource according to the detection time of the PDCCH and a first time slot offset value set, wherein the PDCCH is used for scheduling the transmission of the PDSCH, and the time slot offset value included in the first time slot offset value set is used for indicating the time slot offset value between the PDCCH and the PDSCH;

and determining a semi-static HARQ codebook of the HARQ_ACK transmitted on the first PUCCH according to the candidate PDSCH receiving occasion.

2. The method of claim 1, wherein the indication information comprises:

activating or deactivating at least one of a search space set corresponding to the PDCCH, a detection period of the PDCCH or the PDCCH detection skip information, wherein the search space set corresponding to the PDCCH comprises the detection period of the PDCCH;

the method further comprises the steps of:

And determining the detection time of the PDCCH according to the indication information.

3. The method according to claim 1 or 2, characterized in that the method further comprises:

determining a time unit set corresponding to the time slot where the first PUCCH resource is located according to a second time slot offset value set and the time slot where the first PUCCH resource is located, wherein the time slot offset value included in the second time slot offset value set is used for indicating the time slot where the first PUCCH resource is located and the time slot offset value of a time unit in the time unit set;

the determining, according to the detection timing and the first time slot offset value set of the PDCCH, a candidate PDSCH receiving timing corresponding to the harq_ack sent on the first PUCCH resource includes:

and determining the candidate PDSCH receiving occasion in the time unit set according to the detection occasion of the PDCCH and the first time slot offset value set.

4. A method according to any of claims 1 to 3, characterized in that the PDCCH carries downlink control information, DCI, for scheduling a PDSCH of unicast type.

5. The method of claim 4, wherein the DCI is scrambled corresponding to a cell radio network identity C-RNTI, or to a modulation coding scheme cell radio network identity MCS-C-RNTI, or to a configuration scheduling radio network identity CS-RNTI.

6. The method of claim 2, wherein the second set of slot offset values comprises a number of slot offset values less than or equal to 4.

7. The method according to any one of claims 1 to 6, wherein at least one of the one or more candidate PDSCH time domain resources corresponding to the candidate PDSCH reception opportunity is a downlink symbol.

8. The method according to any of claims 1 to 7, wherein the indication information is further used to indicate that the harq_ack employs a semi-static HARQ codebook.

9. A method of semi-static codebook generation, comprising:

transmitting indication information to terminal equipment, wherein the indication information is used for dynamically changing the detection time of a Physical Downlink Control Channel (PDCCH);

determining candidate Physical Downlink Shared Channel (PDSCH) receiving time corresponding to hybrid automatic repeat request acknowledgement (HARQ_ACK) received on a first Physical Uplink Control Channel (PUCCH) resource according to the detecting time of the PDCCH and a first time slot offset value set, wherein the PDCCH is used for scheduling the transmission of the PDSCH, and the time slot offset value included in the first time slot offset value set is used for indicating the time slot offset value between the PDCCH and the PDSCH;

And determining a semi-static HARQ codebook of the HARQ-ACK received on the first PUCCH resource according to the candidate PDSCH receiving occasion.

10. The method of claim 9, wherein the indication information comprises:

and activating or deactivating at least one of a search space set corresponding to the PDCCH, a detection period of the PDCCH or the PDCCH detection skip information, wherein the search space set corresponding to the PDCCH comprises the detection period of the PDCCH.

11. The method according to claim 9 or 10, characterized in that the method further comprises:

the determining, according to the detection timing and the first time slot offset value set of the PDCCH, a candidate PDSCH receiving timing corresponding to the harq_ack received on the first PUCCH resource includes:

and determining the candidate PDSCH receiving opportunity in a time unit set according to the detection opportunity of the PDCCH and the first time slot offset value set.

12. The method according to any of claims 9 to 11, characterized in that the PDCCH carries downlink control information, DCI, for scheduling a PDSCH of unicast type.

13. The method of claim 12, wherein the DCI is scrambled corresponding to a cell radio network identity C-RNTI, or to a modulation coding scheme cell radio network identity MCS-C-RNTI, or to a configuration scheduling radio network identity CS-RNTI.

14. The method of claim 10, wherein the second set of slot offset values comprises a number of slot offset values less than or equal to 4.

15. The method according to any one of claims 9 to 14, wherein at least one of the one or more candidate PDSCH time domain resources corresponding to the candidate PDSCH reception occasion is a downlink symbol.

16. The method according to any of the claims 9 to 15, characterized in that the indication information is further used to indicate that the harq_ack employs a semi-static HARQ codebook.

17. A communication device, comprising:

a communication unit, configured to receive indication information from a network device, where the indication information is used to dynamically change detection timing of a physical downlink control channel PDCCH;

A processing unit, configured to determine, according to a detection timing of the PDCCH and a first set of slot offset values, a candidate physical downlink shared channel PDSCH reception timing corresponding to a hybrid automatic repeat request acknowledgement harq_ack sent on a first physical uplink control channel PUCCH resource, where the PDCCH is used for scheduling transmission of the PDSCH, and the first set of slot offset values includes a slot offset value used for indicating a slot offset value between the PDCCH and the PDSCH;

the processing unit is further configured to: and determining a semi-static HARQ codebook of the HARQ_ACK transmitted on the first PUCCH according to the candidate PDSCH receiving occasion.

18. The apparatus of claim 17, wherein the indication information comprises:

the processing unit is further configured to: and determining the detection time of the PDCCH according to the indication information.

19. The apparatus according to claim 17 or 18, wherein the processing unit is specifically configured to:

20. The apparatus according to any of claims 17 to 19, wherein the PDCCH carries downlink control information, DCI, the DCI being used to schedule a unicast type of PDSCH.

21. The apparatus of claim 20, wherein the DCI is scrambled corresponding to a cell radio network identity C-RNTI, or to a modulation coding scheme cell radio network identity MCS-C-RNTI, or to a configuration scheduling radio network identity CS-RNTI.

22. The apparatus of claim 19, wherein the second set of slot offset values comprises a number of slot offset values less than or equal to 4.

23. The apparatus of any one of claims 17 to 22, wherein at least one of the one or more candidate PDSCH time domain resources corresponding to the candidate PDSCH reception occasion is a downlink symbol.

24. The apparatus according to any of claims 17 to 23, wherein the indication information is further configured to indicate that the harq_ack employs a semi-static HARQ codebook.

25. A communication device, comprising:

the communication unit is used for sending indication information to the terminal equipment, wherein the indication information is used for dynamically changing the detection time of the physical downlink control channel PDCCH;

a processing unit, configured to determine, according to a detection timing of the PDCCH and a first set of slot offset values, a candidate physical downlink shared channel PDSCH reception timing corresponding to a hybrid automatic repeat request acknowledgement harq_ack received on a first physical uplink control channel PUCCH resource, where the PDCCH is used for scheduling transmission of the PDSCH, and the first set of slot offset values includes a slot offset value used for indicating a slot offset value between the PDCCH and the PDSCH;

the processing unit is further configured to: and determining a semi-static HARQ codebook of the HARQ-ACK received on the first PUCCH resource according to the candidate PDSCH receiving occasion.

26. The apparatus of claim 25, wherein the indication information comprises:

27. The apparatus according to claim 25 or 26, wherein the processing unit is specifically configured to:

28. The apparatus according to any one of claims 25 to 27, wherein the PDCCH carries downlink control information, DCI, the DCI being used to schedule a unicast type of PDSCH.

29. The apparatus of claim 28, wherein the DCI is scrambled corresponding to a cell radio network identity C-RNTI or to a modulation coding scheme cell radio network identity MCS-C-RNTI or to a configuration scheduling radio network identity CS-RNTI.

30. The apparatus of claim 27, wherein the second set of slot offset values comprises a number of slot offset values less than or equal to 4.

31. The apparatus of any one of claims 25 to 30, wherein at least one of the one or more candidate PDSCH time domain resources corresponding to the candidate PDSCH reception occasion is a downlink symbol.

32. The apparatus according to any of claims 25 to 31, wherein the indication information is further configured to indicate that the harq_ack employs a semi-static HARQ codebook.

33. A communication device comprising at least one processor and interface circuitry, the at least one processor configured to perform the method of any one of claims 1 to 8 or 9 to 16.

34. A storage medium having a program stored therein, which when executed by a processor, is adapted to carry out the method of any one of claims 1 to 16.

35. A chip system, comprising: a processor for calling and running a computer program from a memory, causing a communication device in which the chip system is installed to perform the method according to any one of claims 1 to 16.