CN117678175A

CN117678175A - Wireless communication method, terminal equipment and network equipment

Info

Publication number: CN117678175A
Application number: CN202180100819.3A
Authority: CN
Inventors: 张轶; 林亚男
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2021-11-25
Filing date: 2021-11-25
Publication date: 2024-03-08
Also published as: WO2023092431A1

Abstract

A method, a terminal device and a network device for wireless communication are provided. The method comprises the following steps: the terminal equipment receives first DCI, wherein the first DCI is used for scheduling N PDSCH, and HARQ-ACK information corresponding to M PDSCH in the N PDSCH is fed back in the same PUCCH; the M PDSCH includes a first PDSCH whose time domain location is associated with a first set of time units determined based on at least one of: a feedback time sequence set of the terminal equipment, a first subcarrier interval and a second subcarrier interval; the first subcarrier interval is a subcarrier interval of the first PDSCH or a subcarrier interval of the first carrier in which the first PDSCH is located, and the second subcarrier interval is a subcarrier interval of the PUCCH or a subcarrier interval of the second carrier in which the PUCCH is located. The scheme considers one or more of factors such as feedback time sequence set, first subcarrier interval associated with PDSCH, second subcarrier interval associated with PUCCH and the like, and is beneficial to realizing scheduling of one DCI to a plurality of PDSCHs in a multi-carrier scene.

Description

Wireless communication method, terminal equipment and network equipment

Technical Field

The present application relates to the field of communications technologies, and in particular, to a method, a terminal device, and a network device for wireless communications.

Background

In the related art, one downlink control information (downlink control information, DCI) is generally used to schedule one physical downlink shared channel (physical downlink shared channel, PDSCH), or multiple PDSCH of the same cell (or the same carrier).

Currently, many companies want protocols to support PDSCH with one DCI scheduling multiple carriers. However, in a multi-carrier scenario, how to schedule multiple PDSCH using one DCI, no suitable solution exists at present.

Disclosure of Invention

In view of the foregoing, the present application provides a method for wireless communication, a terminal device, and a network device.

In a first aspect, a method of wireless communication is provided, comprising: the method comprises the steps that a terminal device receives first DCI, wherein the first DCI is used for scheduling N PDSCH, hybrid automatic repeat request-acknowledgement (HARQ-ACK) information corresponding to M PDSCH in the N PDSCH is fed back in the same physical uplink control channel (physical uplink control channel, PUCCH), and M and N are positive integers; wherein the M PDSCH includes a first PDSCH whose time domain location is associated with a first set of time units determined based on at least one of: the feedback time sequence set of the terminal equipment comprises a first subcarrier interval and a second subcarrier interval; the first subcarrier interval is a subcarrier interval of the first PDSCH or a subcarrier interval of a first carrier in which the first PDSCH is located, and the second subcarrier interval is a subcarrier interval of the PUCCH or a subcarrier interval of a second carrier in which the PUCCH is located.

In a second aspect, a method of wireless communication is provided, comprising: the network equipment sends first DCI, wherein the first DCI is used for scheduling N PDSCH, HARQ-ACK information corresponding to M PDSCH in the N PDSCH is fed back in the same PUCCH, and M and N are positive integers; wherein the M PDSCH includes a first PDSCH whose time domain location is associated with a first set of time units determined based on at least one of: the feedback time sequence set of the terminal equipment comprises a first subcarrier interval and a second subcarrier interval; the first subcarrier interval is a subcarrier interval of the first PDSCH or a subcarrier interval of a first carrier in which the first PDSCH is located, and the second subcarrier interval is a subcarrier interval of the PUCCH or a subcarrier interval of a second carrier in which the PUCCH is located.

In a third aspect, there is provided a terminal device comprising: a receiving unit, configured to receive a first DCI, where the first DCI is used to schedule N PDSCH, HARQ-ACK information corresponding to M PDSCH in the N PDSCH is fed back in the same PUCCH, and M and N are both positive integers; wherein the M PDSCH includes a first PDSCH whose time domain location is associated with a first set of time units determined based on at least one of: the feedback time sequence set of the terminal equipment comprises a first subcarrier interval and a second subcarrier interval; the first subcarrier interval is a subcarrier interval of the first PDSCH or a subcarrier interval of a first carrier in which the first PDSCH is located, and the second subcarrier interval is a subcarrier interval of the PUCCH or a subcarrier interval of a second carrier in which the PUCCH is located.

In a fourth aspect, there is provided a network device comprising: a transmitting unit, configured to transmit a first DCI, where the first DCI is used to schedule N PDSCH, HARQ-ACK information corresponding to M PDSCH in the N PDSCH is fed back in the same PUCCH, and M and N are both positive integers; wherein the M PDSCH includes a first PDSCH whose time domain location is associated with a first set of time units determined based on at least one of: the feedback time sequence set of the terminal equipment comprises a first subcarrier interval and a second subcarrier interval; the first subcarrier interval is a subcarrier interval of the first PDSCH or a subcarrier interval of a first carrier in which the first PDSCH is located, and the second subcarrier interval is a subcarrier interval of the PUCCH or a subcarrier interval of a second carrier in which the PUCCH is located.

In a fifth aspect, there is provided a terminal device comprising a memory for storing a program and a processor for invoking the program in the memory to perform the method according to the first aspect.

In a sixth aspect, there is provided a network device comprising a memory for storing a program and a processor for invoking the program in the memory to perform the method of the second aspect.

In a seventh aspect, there is provided an apparatus comprising a processor for calling a program from a memory to perform the method of the first aspect.

In an eighth aspect, there is provided an apparatus comprising a processor for calling a program from a memory to perform the method of the second aspect.

In a ninth aspect, there is provided a chip comprising a processor for calling a program from a memory, causing a device on which the chip is mounted to perform the method of the first aspect.

In a tenth aspect, there is provided a chip comprising a processor for calling a program from a memory, so that a device on which the chip is mounted performs the method of the second aspect.

In an eleventh aspect, there is provided a computer-readable storage medium having stored thereon a program that causes a computer to execute the method of the first aspect.

In a twelfth aspect, there is provided a computer-readable storage medium having stored thereon a program that causes a computer to execute the method of the second aspect.

In a thirteenth aspect, there is provided a computer program product comprising a program for causing a computer to perform the method of the first aspect.

In a fourteenth aspect, there is provided a computer program product comprising a program for causing a computer to perform the method of the second aspect.

In a fifteenth aspect, there is provided a computer program for causing a computer to perform the method of the first aspect.

In a sixteenth aspect, there is provided a computer program for causing a computer to perform the method of the second aspect.

In a multi-carrier scenario, when one DCI schedules multiple PDSCH, a certain PDSCH (first PDSCH in the foregoing) and PUCCH (HARQ-ACK information for feeding back the first PDSCH) of the multiple PDSCH may be in different subcarriers. The subcarrier spacing of different carriers may be different (the subcarrier spacing is different and the slot length is different), and thus, multiple PDSCH cannot always be scheduled in exactly the same way. Based on this, in the multi-carrier scenario, when multiple PDSCH needs to be scheduled by using one DCI, the embodiments of the present application consider one or more factors of feedback timing set of the terminal device, first subcarrier interval associated with PDSCH, and second subcarrier interval associated with PUCCH, which are helpful for implementing scheduling of multiple PDSCH by one DCI in the multi-carrier scenario.

Drawings

Fig. 1 is a system architecture diagram of a communication system to which embodiments of the present application may be applied.

Fig. 2 is an example diagram of a feedback window of a Type-1HARQ-ACK codebook.

Fig. 3 is an example diagram of an arrangement of multiple candidate PDSCH receivers in the same slot.

FIG. 4 is an exemplary diagram of an expansion operation on a k1 set.

Fig. 5 is a flow chart of a wireless communication method according to an embodiment of the present application.

Fig. 6 is an exemplary diagram of one possible manner of determining the first set of time units provided in an embodiment of the present application.

Fig. 7 is an example diagram of another possible manner of determining the first set of time units provided by an embodiment of the present application.

Fig. 8 is an example diagram of yet another possible manner of determining the first set of time units provided by an embodiment of the present application.

Fig. 9A is an example diagram of a time domain resource indication manner of DCI provided in an embodiment of the present application.

Fig. 9B is another exemplary diagram of a time domain resource indication manner of DCI according to an embodiment of the present application.

Fig. 10 is a schematic structural diagram of a terminal device provided in an embodiment of the present application.

Fig. 11 is a schematic structural diagram of a network device according to an embodiment of the present application.

Fig. 12 is a schematic structural diagram of an apparatus according to an embodiment of the present application.

Detailed Description

Communication system

Fig. 1 is a wireless communication system 100 to which embodiments of the present application apply. The wireless communication system 100 may include a network device 110 and a terminal device 120. Network device 110 may be a device that communicates with terminal device 120. Network device 110 may provide communication coverage for a particular geographic area and may communicate with terminal devices 120 located within the coverage area.

Fig. 1 illustrates one network device and two terminal devices by way of example, and the wireless communication system 100 may alternatively include multiple network devices and may include other numbers of terminal devices within the coverage area of each network device, as embodiments of the present application are not limited in this regard.

Optionally, the wireless communication system 100 may further include a network controller, a mobility management entity, and other network entities, which are not limited in this embodiment of the present application.

It should be understood that the technical solution of the embodiments of the present application may be applied to various communication systems, for example: fifth generation (5th generation,5G) systems or New Radio (NR), 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), and the like. The technical scheme provided by the application can also be applied to future communication systems, such as a sixth generation mobile communication system, a satellite communication system and the like.

The Terminal device in the embodiments of the present application may also be referred to as a User Equipment (UE), an access Terminal, a subscriber unit, a subscriber station, a Mobile Station (MS), a Mobile Terminal (MT), a remote station, a remote Terminal, a mobile device, a user Terminal, a Terminal device, a wireless communication device, a user agent, or a user equipment. The terminal device in the embodiment of the application can be a device for providing voice and/or data connectivity for a user, and can be used for connecting people, things and machines, such as a handheld device with a wireless connection function, a vehicle-mounted device and the like. The terminal device in the embodiments of the present application may be a mobile phone (mobile phone), a tablet (Pad), a notebook, a palm, a mobile internet device (mobile internet device, MID), a wearable device, a Virtual Reality (VR) device, an augmented reality (augmented reality, AR) device, a wireless terminal in industrial control (industrial control), a wireless terminal in self 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), or the like. Alternatively, the UE may be used to act as a base station. For example, the UEs may act as scheduling entities that provide side-uplink signals between UEs in V2X or D2D, etc. For example, a cellular telephone and a car communicate with each other using side-link signals. Communication between the cellular telephone and the smart home device is accomplished without relaying communication signals through the base station.

The network device in the embodiments of the present application may be a device for communicating with a terminal device, which may also be referred to as an access network device or a radio access network device, e.g. the network device may be a base station. The network device in the embodiments of the present application may refer to a radio access network (radio access network, RAN) node (or device) that accesses the terminal device to the wireless network. The base station may broadly cover or replace various names in the following, such as: a node B (NodeB), an evolved NodeB (eNB), a next generation NodeB (gNB), a relay station, an access point, a transmission point (transmitting and receiving point, TRP), a transmission point (transmitting point, TP), a master MeNB, a secondary SeNB, a multi-mode wireless (MSR) node, a home base station, a network controller, an access node, a wireless node, an Access Point (AP), a transmission node, a transceiving node, a baseband unit (BBU), a remote radio unit (Remote Radio Unit, RRU), an active antenna unit (active antenna unit, AAU), a radio head (remote radio head, RRH), a Central Unit (CU), a Distributed Unit (DU), a positioning node, and the like. The base station may be a macro base station, a micro base station, a relay node, a donor node, or the like, or a combination thereof. A base station may also refer to a communication module, modem, or chip for placement within the aforementioned device or apparatus. The base station may also be a mobile switching center, a device-to-device (D2D), a vehicle-to-device (V2X), a device that assumes a base station function in machine-to-machine (M2M) communication, a network-side device in a 6G network, a device that assumes a base station function in a future communication system, or the like. The base stations may support networks of the same or different access technologies. The embodiment of the application does not limit the specific technology and the specific device form adopted by the network device.

The base station may be fixed or mobile. For example, a helicopter or drone may be configured to act as a mobile base station, and one or more cells may move according to the location of the mobile base station. In other examples, a helicopter or drone may be configured to function as a device to communicate with another base station.

In some deployments, the network device in embodiments of the present application may refer to a CU or a DU, or the network device includes a CU and a DU. The gNB may also include an AAU.

Network devices and terminal devices may be deployed on land, including indoors or outdoors, hand-held or vehicle-mounted; the device can be deployed on the water surface; but also on aerial planes, balloons and satellites. In the embodiment of the application, the scene where the network device and the terminal device are located is not limited.

It should be understood that the communication device referred to in this application may be a network device or may also be a terminal device. For example, the first communication device is a network device, and the second communication device is a terminal device. As another example, the first communication device is a terminal device and the second communication device is a network device. As another example, the first communication device and the second communication device are both network devices, or are both terminal devices.

It should also be understood that all or part of the functionality of the communication device in this application may also be implemented by software functions running on hardware, or by virtualized functions instantiated on a platform (e.g. a cloud platform).

HARQ timing (HARQ timing)

After receiving the PDSCH, the terminal device decodes the PDSCH. The terminal device may send HARQ-ACK information corresponding to the PDSCH to the network device according to the decoding result of the PDSCH. For example, if PDSCH decoding is successful, the terminal device may send an Acknowledgement (ACK) to the network device; if PDSCH decoding fails, the terminal device may send a negative acknowledgement (negative acknowledgement, NACK) to the network device. The HARQ-ACK information may sometimes be simply referred to as feedback information. HARQ-ACK information is typically represented by 1 bit, and thus HARQ-ACK information may sometimes be referred to as feedback bits. HARQ-ACK information may be carried on PUCCH. In other words, the terminal device may feedback HARQ-ACK information corresponding to the PDSCH using the PUCCH (i.e., HARQ feedback).

The HARQ timing may also be referred to as HARQ-ACK timing (HARQ-ACK timing). In some communication systems, such as the NR release 15 (rel-15) system, HARQ timing represents a slot offset value or a slot timing value (slot timing value) between a slot in which a PDSCH is located to a slot in which a PUCCH is located (or between a slot in which a PDSCH is located to a slot in which HARQ-ACK information corresponding to the PDSCH is located). The slot offset value is generally denoted by k 1.

A common way of determining HARQ timing is given below. First, the network device may configure a feedback timing set for the terminal device through radio resource control (radio resource control, RRC) signaling. The feedback timing set may include one or more k1 values. Therefore, this feedback timing set may also be referred to as a k1set (k 1 set). Next, the network device may schedule PDSCH through DCI (hereinafter, for convenience of description, the DCI-scheduled PDSCH will be referred to as PDSCH 1). The DCI may include a "PDSCH-to-HARQ feedback timing indication (PDSCH-to-harq_ feedback timing indicator)". The PDSCH-to-HARQ feedback timing indication is used to indicate to the terminal device one element of the k1set, i.e. one k1 value. The terminal device can determine the timing relationship (or time sequence relationship) between the time slot where the PDSCH 1 is located and the time slot where the HARQ-ACK information corresponding to the PDSCH 1 is located according to the k1 value. Assuming that the time slot in which the HARQ-ACK information is located is time slot n, the time slot in which the PDSCH 1 is located is time slot n-k1. The terminal device may then transmit a PUCCH to the network device at slot n to transmit the HARQ-ACK information to the network device over the PUCCH.

It should be noted that the value of k1 may be 0. k1 =0 may be defined as the last uplink time slot (k1=0 corresponds to the last UL slot that overlaps with the DL slot for the PDSCH) overlapping (overlapping) the downlink time slot where the PDSCH is located.

Sub-slot (sub-slot) and sub-slot based HARQ timing

The HARQ timing described above is slot-based HARQ timing, i.e., the timing relationship between the PDSCH and the HARQ-ACK information corresponding to the PDSCH is defined in a slot basis. However, the basic unit of HARQ timing is not limited to a slot. In some scenarios, HARQ timing may be in shorter time units as a basic unit. For example, in the ultra-reliable and low-latency communication (URLLC) of NR rel-16, in order to shorten the feedback delay of HARQ-ACK information (or the feedback delay of PUCCH), the item supports a sub-slot based communication architecture. Illustratively, one slot may include 2 or 7 sub-slots. One slot typically includes 14 symbols (symbols). Thus, if one slot includes 2 sub-slots, each sub-slot may include 7 symbols. Similarly, if one slot includes 7 sub-slots, each sub-slot may include 2 symbols.

The sub-slot based HARQ timing is substantially similar to the slot based HARQ timing, with the main difference being that: in the sub-slot based HARQ timing, k1 represents an offset value between sub-slots.

In the sub-slot HARQ timing, the value of k1 may be 0. But unlike the definition of k1=0 in the slot-based HARQ timing, in the sub-slot-based HARQ timing k1=0 is defined as the last uplink sub-slot overlapping (overlap) with the last symbol of the PDSCH.

HARQ-ACK codebook

Some communication systems support multiple types of HARQ-ACK codebooks. The HARQ-ACK codebook may also be referred to as a feedback codebook. The HARQ-ACK codebook types are different, and the HARQ-ACK information generation modes are different. Taking the NR Rel-15 system as an example, the system supports a Type-1HARQ-ACK codebook and a Type-2HARQ-ACK codebook. The Type-1HARQ-ACK codebook may also be referred to as a semi-static HARQ-ACK codebook (semi-static HARQ-ACK codebook). The Type-2HARQ-ACK codebook may also be referred to as a dynamic HARQ-ACK codebook (dynamic HARQ-ACK codebook).

In order to facilitate understanding, a detailed description will be given below of a generation manner of HARQ-ACK information corresponding to the Type-1HARQ-ACK codebook.

First, a candidate PDSCH reception opportunity (occasion for candidate PDSCH reception) may be determined in a semi-static manner according to a number of serving cells (serving cells), a set of k1, and a set of row indexes (each row index in a set of row indexes (a set of row indexes)) of a time-domain resource allocation (time domain resource assignment, TDRA) table configured by a network device for a terminal device, one row index corresponding to one row (or TDRA row) of the TDRA table, one row index may define or indicate one or more of a PDCCH to PDSCH slot offset value k0, a start and length indication (start and length indicators, SLIV), and a PDSCH mapping type (PDSCH mapping type). Then, the bit number of the HARQ-ACK information corresponding to the Type-1HARQ-ACK codebook may be determined according to the reception opportunity of the candidate PDSCH. Then, decoding results of PDSCH in the reception opportunities of the respective candidate PDSCH may be mapped to corresponding bits in the Type-1HARQ-ACK codebook.

Specifically, in the feedback mode based on the Type-1HARQ-ACK codebook, a feedback window may be determined according to the k1 set. The feedback window may include one or more time slots (the feedback window contains a number of time slots associated with the number of k1 values in the k1 set). Taking fig. 2 as an example, assuming that the k1 set of the terminal device is configured as {1,2,4}, and the Type-1HARQ-ACK codebook is carried in the slot n, the feedback window determined according to the k1 set may include the following 3 slots: { time slot n-1, time slot n-2, time slot n-4}. The reception opportunity of the candidate PDSCH may be determined according to the SLIV indicated by the series of row indexes in the slots included in the feedback window.

It follows that the number of bits of HARQ-ACK information included in the Type-1HARQ-ACK codebook is not dependent on the number of PDSCH actually received, but is determined based on the reception opportunities (i.e., the maximum number of PDSCH receivable) of the candidate PDSCH of the semi-static configuration. The above-defined manner of the number of bits of the HARQ-ACK codebook has the advantage that: the method can avoid ambiguity of the terminal equipment and the network equipment in understanding the HARQ-ACK codebook size caused by that the terminal equipment does not receive part of PDSCH, thereby leading the network equipment to be unable to correctly receive the HARQ-ACK information sent by the terminal equipment. However, this approach requires reserving feedback information bits in the HARQ-ACK codebook for all possible transmitted PDSCH. Therefore, the above-defined method of the number of bits of the HARQ-ACK codebook has a disadvantage of large feedback overhead. Thus, in some scenarios, some redundant feedback information in the Type-1HARQ-ACK codebook may be removed to reduce the feedback overhead of the Type-1HARQ-ACK codebook.

For example, in general, a terminal device can only receive one PDSCH at most at the same time in one carrier. If the reception opportunities of the plurality of candidate PDSCHs overlap in the time domain, the reception opportunities of the plurality of candidate PDSCHs may share one feedback information bit in the Type-1HARQ-ACK codebook. Taking fig. 3 as an example, the receiver 1 of the candidate PDSCH in the slot shown in fig. 3 overlaps with the receivers 2 and 3 of the candidate PDSCH in the time domain, so that in general, the receivers of the 3 candidate PDSCH do not transmit PDSCH simultaneously. If corresponding feedback information bits are reserved in the Type-1HARQ-ACK codebook for the receivers 1, 2 and 3 of the candidate PDSCH respectively, feedback information redundancy is caused. Thus, one feedback information bit may be reserved for the receiver opportunities 1, 2, 3 of the candidate PDSCH, which may be shared by the receiver opportunities of the 3 candidate PDSCH. By shared, it is meant that the feedback information corresponding to the PDSCH is mapped onto one and the same bit of the Type-1HARQ-ACK codebook, regardless of which of the 3 candidate PDSCH reception opportunities the terminal device receives the PDSCH. It can be seen that, after this scheme is adopted, in the example shown in fig. 3, the slot includes 5 candidate PDSCH reception opportunities, but only 2 feedback information bits need to be reserved in the Type-1HARQ-ACK codebook (it should be understood that the single codeword transmission is taken as an example here, that is, one PDSCH only carries 1 Transport Block (TB) and corresponds to 1 bit of feedback information). If the terminal device does not have the capability to receive more than 1 unicast PDSCH (unicast PDSCH) in 1 slot, the terminal device does not receive 2 PDSCH simultaneously in 1 slot. In this case, redundancy of feedback information in the Type-1HARQ-ACK codebook may be further reduced. Still taking fig. 3 as an example, if the terminal device does not have the capability to receive more than 1 unicast PDSCH in 1 slot, the receiver of the 5 candidate PDSCH in fig. 3 may share only 1 feedback information bit. That is, no matter which of the 5 candidate PDSCH reception opportunities in fig. 3 receives the PDSCH, the feedback information corresponding to the PDSCH is mapped to one and the same bit of the Type-1HARQ-ACK codebook.

The above description is an example of the generation of HARQ-ACK information corresponding to the Type-1HARQ-ACK codebook using the time slot as the basic unit of HARQ timing, and the generation of HARQ-ACK information is also applicable to the case where the sub-slot is the basic unit of HARQ timing, and only the element in the k1 set needs to be regarded as the sub-slot offset value.

HARQ-ACK signaling in dual connectivity (dual connectivity, DC)/carrier aggregation (carrier aggregation, CA) mode Feedback of information

The network device may configure the terminal device with multiple cell groups if the terminal device is operating in DC/CA mode. For example, the network device may configure the terminal device with one primary cell group (master cell group, MCG) and one secondary cell group (secondary cell group, SCG). The MCG corresponds to a master node (master node) and includes a set of serving cells (serving cells). The group of serving cells has one special cell, i.e. primary cell (PCell). The primary cell may be a cell in which the terminal device initiates a random access procedure.

The SCG corresponds to a Secondary Node (SN) and includes a set of serving cells. The group of serving cells also has a special cell, i.e. a primary secondary cell (primary secondary cell, PSCell). The primary and secondary cells may be cells in which the terminal device initiates a random access procedure.

In DC/CA mode, to simplify implementation, the protocol specifies that the terminal device cannot feed back PUCCH in all serving cells in MCG and SCG. Thus, the network device may configure the PUCCH-Cell parameter for the serving Cell to implicitly divide one Cell group (e.g., MCG or SCG) into two PUCCH groups (PUCCH groups). In the two PUCCH groups, HARQ-ACK information corresponding to PDSCH of a Cell in one PUCCH group is fed back on a special Cell (PCell or PSCell) of the Cell group, and HARQ-ACK information corresponding to PDSCH of a Cell in the other PUCCH group is fed back on a PUCCH-Cell (or PUCCH SCell) configured by a serving Cell.

The "pucch-Cell" parameter referred to in the foregoing may be located in a PDSCH-serving Cell configuration Cell (PDSCH-ServingCellConfig information element) of the serving Cell. An example of the format of the cell is given below.

As can be seen from the above example, the Cell includes a "pucch-Cell" field. This field may be used to define an index of a serving cell transmitting PUCCH in the same cell group. If the PDSCH-serving cell configuration element of a certain serving cell lacks the field, the terminal device may load HARQ-ACK information corresponding to the serving cell in the PUCCH of a special cell of the cell group to which the serving cell belongs, or if the serving cell itself is a PUCCH SCell, the terminal device may load HARQ-ACK information corresponding to the serving cell in the PUCCH of the serving cell.

Multiple PDSCH of the same cell scheduled by DCI

Some communication systems support one DCI scheduling multiple PDSCH of the same cell (or same carrier). For example, NR Rel-17 supports one DCI to schedule multiple PDSCH/PUSCHs (multi-PDSCH/PUSCHs) of the same cell in the work item "extend the current NR operation to 71GHz (Extending current NR operation to 71 GHz)".

Taking one DCI scheduling multiple PDSCH (different PDSCH may be used to carry different TB) as an example. The DCI may contain an indication field shared by all PDSCH of the DCI schedule. For example, the DCI may include a modulation and coding strategy (modulation and coding scheme, MCS). The MCS may be shared by all PDSCH scheduled by the DCI, i.e., the MCS of all PDSCH remain consistent. In addition, the DCI may also include an indication field for each PDSCH (i.e., the indication field is per PDSCH). For example, the DCI may include a redundancy version (redundancy version, RV) indication field and a new data indication (new data indicator, NDI) indication field corresponding to each PDSCH of the DCI schedule, and the RV indication field and the NDI indication field corresponding to different PDSCHs may be different. For the time domain resource indication of the multiple PDSCH, reference may be made to a multi-PUSCH (multi-PUSCH) design scheme for 5G NR-U (unlicensed spectrum in 5G NR in unlicensed spectrum,5G NR). That is, the TDRA table may be extended such that each TDRA row of the TDRA table indicates a SLIV of a plurality (may be 8, for example) of PDSCH, a PDSCH mapping type, and a PDCCH-to-PDSCH slot offset value k0.

Further, when one DCI schedules multiple PDSCH of the same cell, HARQ-ACK information corresponding to the multiple PDSCH may be fed back through the same PUCCH. For example, the HARQ-ACK information corresponding to the plurality of PDSCH may be fed back using a Type-1HARQ-ACK codebook. In this case, the PDSCH-to-HARQ feedback timing indication in the DCI may be used to indicate a timing relationship between a slot in which one PDSCH (e.g., the last scheduled PDSCH of the plurality of PDSCHs) is located to a slot in which PUCCH (HARQ-ACK information for feeding back the plurality of PDSCHs) is located. Taking fig. 4 as an example, assume that one DCI schedules 3 PDSCH of the same cell: PDSCH 1,PDSCH 2,PDSCH 3,PUCCH is used for feeding back HARQ-ACK information corresponding to the 3 PDSCHs, and the PDSCH-to-HARQ feedback timing indication in the DCI may indicate a slot relationship between a slot in which PDSCH 3 is located and a slot in which PUCCH is located.

Continuing with fig. 4 as an example, assume that the k1 set configured by the terminal device is {1}, the slot offset value from the slot in which PDSCH 1 in fig. 4 is located to the slot in which PUCCH is located is 4, the slot offset value from the slot in which PDSCH 2 in fig. 4 is located to the slot in which PUCCH is located is 2, and neither slot offset value belongs to the element in the k1 set. If this occurs, as can be seen from the foregoing description of the Type-1HARQ-ACK codebook, the feedback window corresponding to the Type-1HARQ-ACK codebook does not include the time slots in which the PDSCH 1 and the PDSCH 2 are located, so that corresponding feedback information bits are not reserved for the PDSCH 1 and the PDSCH 2 in the Type-1HARQ-ACK codebook. In order to solve this problem, NR Rel-17 extends (extension) the k1 set so that slot offset values between slots where multiple PDSCH's scheduled by the same DCI are located and slots where PUCCH is located can all fall into the k1 set. Still taking fig. 4 as an example, the k1 set= {1} configured by the terminal device may be extended to the k1 set= {1,2,4}. In this way, the Type-1HARQ-ACK codebook in slot n (in the PUCCH of slot n) reserves feedback information bits for the PDSCH in slot n-1 (PDSCH 3 in FIG. 4), the PDSCH in slot n-2 (PDSCH 2 in FIG. 4), and the PDSCH in slot n-4 (PDSCH 1 in FIG. 4).

PDSCH with DCI scheduling multiple carriers

Currently, a scheme in which one DCI schedules PDSCH of a plurality of carriers is increasingly being paid attention to and proposed. For example, one work item at NR Rel-17 is how to better support dynamic spectrum sharing of LTE and NR (dynamic spectrum sharing, DSS). On the carrier shared by LTE and NR, in order to avoid interference caused by communication signals of the NR system to the LTE system, the protocol requires that the NR system does not use cell-specific reference signal (cell-specific reference signal, CRS) resources and PDCCH resources of the LTE system. Thus, the capacity of the PDCCH of the NR system will be affected on this shared carrier. One research goal of DSS is to study new mechanisms to solve the problem of lower PDCCH capacity of NR systems. One potential solution to this problem is to schedule PDSCH for two different carriers with one DCI. For example, one DCI transmitted on a PCell or SCell may schedule PDSCH on both the PCell and SCell (it should be noted that in this application, "cell (or serving cell)" and "carrier" are two concepts that have the same meaning, and that they may be replaced with each other without explicit distinction). However, due to time relation, standardization work of the feature that one DCI in NR Rel-17 schedules PDSCH of two carriers is not completed.

Currently, many companies want protocols to support PDSCH with one DCI scheduling multiple carriers. However, in a multi-carrier scenario, the PUCCH for feeding back HARQ-ACK information corresponding to the PDSCH may be located on a different carrier than the PDSCH. The subcarrier spacing may be different for different carriers, resulting in different carriers that may have different time slot lengths. When HARQ-ACK information corresponding to multiple PDSCH scheduled by the same DCI needs to be fed back through the same PUCCH, how to design a time domain position of the PDSCH, so that a HARQ-ACK codebook included in the PUCCH may include HARQ-ACK information of the multiple PDSCH, and no suitable solution is currently available.

In order to solve the above-mentioned problems, an embodiment of the present application will be described in more detail below with reference to fig. 5. Fig. 5 is a depiction of a station in terms of terminal device and network device interactions. The terminal device may be, for example, terminal device 120 of fig. 1, and the network device may be, for example, network device 110 of fig. 1.

Referring to fig. 5, in step S510, a terminal device receives first DCI transmitted by a network device. The first DCI may be used to schedule N PDSCH. N may be a positive integer greater than or equal to 2. In some embodiments, the N PDSCH may be located on P carriers (P is less than or equal to N). For example, the N PDSCH may be located on N carriers, respectively. That is, the first DCI may be used to schedule PDSCH on N carriers. For example, the terminal device may operate in a DC/CA mode. In DC/CA mode, the terminal device may be configured with multiple carriers (or multiple serving cells, serving cells and carriers in this application are two equivalent concepts, which may be interchanged). In this example scenario, the network device may schedule multiple carriers in DC/CA mode with the first DCI.

The HARQ-ACK information corresponding to M PDSCH (M is a positive integer greater than or equal to 2 and M is less than or equal to N) of the N PDSCH may be fed back through the same PUCCH. For example, the PUCCH may carry a Type-1HARQ-ACK codebook. The Type-1HARQ-ACK codebook may reserve bits for HARQ-ACK information corresponding to M PDSCHs. In some embodiments, the terminal device may feed back HARQ-ACK information corresponding to the M PDSCH on the PUCCH. For example, the terminal device may generate a HARQ-ACK codebook (Type-1 HARQ-ACK codebook), which may include HARQ-ACK information corresponding to M PDSCH. The terminal device may then transmit the HARQ-ACK codebook to the network device through the PUCCH.

In some embodiments, the M PDSCH may be located on Q carriers (Q is less than or equal to M, where Q carriers belong to the aforementioned P carriers, where Q, P is a positive integer). For example, the M PDSCH may belong to M carriers, respectively. Further, in some embodiments, the M carriers may belong to the same PUCCH group (the concept of PUCCH group may be referred to in the introduction above in relation to "feedback of HARQ-ACK information in DC/CA mode").

In some embodiments, the first DCI includes a PDSCH-to-HARQ feedback timing indication (PDSCH-to-harq_ feedback timing indicator) that may indicate an offset value of a time cell (e.g., slot) where one or more PDSCH of the M PDSCH is located to a time cell (e.g., slot) where PUCCH is located. For example, the PDSCH-to-HARQ feedback timing indication may indicate an offset value from a time cell where an xth PDSCH of the M PDSCHs is located to a time cell where a PUCCH is located, where X is 1+.ltoreq.m, where the value of X is a positive integer. The xth PDSCH may be one of the M PDSCHs satisfying the following condition: the first PDSCH scheduled, the last PDSCH scheduled, the PDSCH with the smallest associated serving cell index, or the PDSCH with the largest associated serving cell index.

The first scheduled PDSCH mentioned above may be the PDSCH with the earliest end time among the M PDSCHs. The end time referred to herein may refer to a transmission end time of the PDSCH (e.g., an end time of a last symbol of the PDSCH), or may refer to an end time of a time unit (e.g., a slot) in which the PDSCH is located (e.g., an end time of a last slot in which the PDSCH is located). If the M PDSCHs include at least two PDSCHs having the same end time, and the end time of the at least two PDSCHs having the same end time is earlier than the end time of the remaining PDSCHs of the M PDSCHs, the first scheduled PDSCH may be a PDSCH satisfying the following condition among the at least two PDSCHs: PDSCH with the earliest transmission start time, PDSCH with the latest transmission start time, PDSCH with the largest associated cell index, PDSCH with the smallest associated cell index, PDSCH with the largest subcarrier spacing, or PDSCH with the smallest subcarrier spacing.

The last scheduled PDSCH mentioned above may be the earliest ending time PDSCH among the M PDSCHs. The end time referred to herein may refer to a transmission end time of the PDSCH (e.g., an end time of a last symbol of the PDSCH), or may refer to an end time of a time unit (e.g., a slot) in which the PDSCH is located (e.g., an end time of a last slot in which the PDSCH is located). If the M PDSCHs include at least two PDSCHs with the same end time, and the end time of the at least two PDSCHs with the same end time is later than the remaining PDSCHs of the M PDSCHs, the last scheduled PDSCH may be a PDSCH of the at least two PDSCHs that satisfies the following condition: PDSCH with the earliest transmission start time, PDSCH with the latest transmission start time, PDSCH with the largest associated cell index, PDSCH with the smallest associated cell index, PDSCH with the largest subcarrier spacing, or PDSCH with the smallest subcarrier spacing.

The M PDSCH may include a first PDSCH (may be any one PDSCH of the M PDSCH). The time domain location of the first PDSCH is associated with a first set of time units. The first set of time units may include one or more time units. The length of the time units in the first time unit set is not specifically limited in the embodiments of the present application, and may be, for example, one or more combinations of time slots, sub-slots, and one or more symbols.

In some embodiments, "the time domain location of the first PDSCH is associated with a first set of time units" may refer to the time domain location of the first PDSCH being determined based on the first set of time units. Alternatively, a first set of time cells may be used to define the time domain location of the first PDSCH.

In some embodiments, "the time domain position of the first PDSCH is associated with a first set of time units" may refer to some or all of the time domain positions of the first PDSCH being within the first set of time units. As a possible implementation, the time slot in which the first PDSCH is located in the first set of time units. Alternatively, the terminal device does not expect time cells other than the first set of time cells on the first carrier for the first PDSCH. The terminal device does not expect the first PDSCH to be located in time cells other than the first set of time cells on the first carrier, and accordingly, the network device may schedule the first PDSCH so that the first PDSCH is located within the first set of time cells. Of course, the embodiment of the present application does not exclude a case that the network device schedules the first PDSCH so that the first PDSCH is located in a time unit other than the first time unit set (in addition, "the terminal device does not expect" in other embodiments of the present application, and may be understood in the same or similar manner, which will not be described in detail later). For example, if the time unit of the HARQ timing of the second carrier (the carrier on which the PUCCH is located) is a slot, the slot on which the first PDSCH is located within the first set of time units. As another possible implementation, the last symbol of the first PDSCH is located within the first set of time units. Alternatively, the terminal device does not expect the last symbol of the first PDSCH to be located in a time cell on the first carrier other than the first set of time cells. For example, if the time unit of the HARQ timing of the second carrier (the carrier on which the PUCCH is located) is a sub-slot, the last symbol of the first PDSCH is located within the first set of time units.

In some embodiments, the first set of time units may be time units on a first carrier. The first set of time units may include at least one time unit, and the at least one time unit overlaps with a time unit in the second set of time units in the time domain. The at least one time unit may be part or all of the time units on the first carrier that overlap in time domain with the time units in the second set of time units. The second set of time units referred to herein may be time units determined based on the time domain position of the PUCCH and the feedback timing set. For example, the second set of time units is the time slot { n-k1} on the second carrier. Where n represents a time unit where the PUCCH is located (e.g., n is a number of the time unit where the PUCCH is located, taking a time slot as an example, where n represents a slot number of the time slot where the PUCCH is located), and k1 represents each element in the feedback timing set of the terminal device. In other words, the value range of k1 may be all elements in the feedback timing set. Taking the example that PUCCH is located in slot n, if the feedback timing set k1= {1,2,4}, the second time unit set may include slot { n-1, n-2, n-4}.

The method for determining the first time unit set in the embodiment of the present application is not specifically limited. In some embodiments, the first set of time units may be determined based on at least one of the following information: the feedback timing set (or k1 set) of the terminal device includes a first subcarrier spacing (which may refer to a subcarrier spacing of the first PDSCH or a subcarrier spacing of a first carrier on which the first PDSCH is located) and a second subcarrier spacing (which may refer to a subcarrier spacing of the PUCCH or a subcarrier spacing of a second carrier on which the PUCCH is located), where the PUCCH refers to a PUCCH for feeding back HARQ-ACK information corresponding to the first PDSCH. For example, the first set of time units may be determined based on a set of feedback timing of the terminal device. As another example, the first set of time units may be determined based on the second subcarrier spacing. As another example, the first set of time units may be determined based on a size relationship between the first subcarrier spacing and the second subcarrier spacing.

Alternatively, in some embodiments, the first inter-cell set may be determined based on a combination of the various ways above. For example, the first inter-unit set may be determined based on a feedback timing set of the terminal device in combination with a size relationship between the first subcarrier spacing and the second subcarrier spacing.

Furthermore, in some embodiments, the first set of time units may also be determined in combination with other factors. For example, in determining the first time unit set, a time unit (e.g., a slot or sub-slot) on which the HARQ timing of the second carrier (the carrier on which the PUCCH is located) is based may be considered in addition to the above-mentioned factors.

The manner in which the first set of time units is determined is illustrated in more detail below in connection with particular embodiments.

Example 1

The first set of time units may be determined based on the first parameter and/or the second parameter. The first parameter may be n-k1. The second parameter may be ANDAnd/orRelated parameters. For example, the second parameter may beOr (b)n may represent the time unit where the PUCCH is located (e.g. the slot where the PUCCH is located), μ _DL The first subcarrier spacing may be represented,μ _UL the second subcarrier spacing may be represented. First subcarrier spacing, mu _DL The relation of (2) may be formulatedAnd (5) determining. For example mu _DL The values of (2) may be 0,1,2,3,4, respectively, and correspondingly, the first subcarrier spacing may be 15khz,30khz,60khz,120khz,240khz, respectively. Second subcarrier spacing mu _DL The relation of (2) can also be formulatedDetermination of mu _UL The values of (2) may be 0,1,2,3,4, respectively, and correspondingly, the second subcarrier spacing may be 15khz,30khz,60khz,120khz,240khz, respectively.

Several possible implementations of the first embodiment are given below.

The implementation mode is as follows:

the first set of time units may include time unitsTaking time units as time slots as an example, the first set of time units may include time slotsWherein the method comprises the steps ofRepresenting a rounding down. In other words, the terminal device does not expect the time domain position of the first PDSCH to be located in the time slot of the first carrierOutside time slots.

In one implementation, the value range of k1 may be all elements in the feedback timing set of the terminal device. Alternatively, the value range of k1 may be a part of elements in the feedback timing set of the terminal device. For example, the value range of k1 may be an element in the feedback timing set of the terminal device that satisfies the following formula:where mod (·) represents the remainder operation. It should be noted that, the example requires that the value of k1 accords with the value range defined by the formula, but the embodiment of the application does not limit the specific form of the formula, and the formula can also adopt other variants, for example, in μ _DL ≤μ _UL In the case of (2), the above formula can be rewritten as well

In some embodiments, the first set of time units may be determined to be time units again if a certain condition is met As an example, one can at μ _DL ＜μ _UL In the case of (a), the first time unit set is set to include time unitsFor example, if μ _DL ＜μ _UL The first set of time units may include time units Wherein k1 may include only elements satisfying the following formula in the feedback timing set of the terminal device: of course, in other examples, μmay also be _DL ＞μ _UL In the case of (a), the first time unit set is set to include time unitsAlternatively, μmay be _DL ＝μ _UL In the case of (a), the first time unit set is set to include time units

A more specific example is given below in connection with fig. 6. As shown in fig. 6, 3 carriers are set between the network device and the terminal device: CC1, CC2, CC3. Wherein, the subcarrier spacing of CC1 is 15kHz, the subcarrier spacing of CC2 is 30kHz, and the subcarrier spacing of CC3 is 60kHz. In addition, the feedback timing set configured by the network device for the terminal device is {1,2,4}.

The terminal device receives a first DCI sent by the network device, wherein the first DCI is used for scheduling PDSCH of CC 1-CC 3. The 3 carriers may belong to the same PUCCH group, and thus HARQ-ACK information corresponding to PDSCH of the 3 carriers may be fed back through the same PUCCH. In the example of fig. 6, the PUCCH is located in slot 8 on CC 2.

If the first PDSCH mentioned above is a PDSCH on CC1, the time domain position of the first PDSCH may be located in a time slot(corresponding to the first set of time units mentioned above), and the value range of k1 only includes the elements in the feedback timing set of the terminal device that satisfy the following formula:in the feedback timing set {1,2,4}, since only k1=1 satisfiesThus, time slotsFor time slotsI.e., slot 3. Alternatively, the terminal device does not expect PDSCH on CC1 to be scheduled in a slot other than slot {3} of CC 1.

The foregoing describes how to determine the scheduling and feedback framework of the Type-1HARQ-ACK codebook based on the feedback timing set of the terminal device in the section "HARQ-ACK codebook". In the implementation manner, the scheduling and feedback framework of the Type-1HARQ-ACK codebook is multiplexed as much as possible, a completely new design of a feedback window (corresponding to the first time unit set) is not needed, and only the relation of subcarrier spacing between the PDSCH and the PUCCH is combined to make adaptive adjustment. The implementation mode has good compatibility with the current protocol, and the terminal equipment is simple to implement.

The implementation mode II is as follows:

the first time unit set includes time unitsTime unit Time units in between. Taking time units as time slots as an example, the first set of time units may include time slots To time slotIn other words, the terminal device does not expect the time domain position of the first PDSCH to be located in the time slot of the first carrierTo time slotOutside time slots.

The time unitTime unitThe time units in between may include time unitsAnd time unitAlternatively, time unitsTime unitThe time units in between may include time unitsWithout inclusion of time unitsAlternatively, time unitsTime unitThe time units in between may include time unitsWithout inclusion of time unitsAlternatively, time unitsTime unitThe time units in between may not include time unitsAnd time unitBut only includes time cells within a time range defined by both.

In some embodiments, the first time unit set may be determined to include time units if a certain condition is metTime unitTime units in between. As an example, one can at μ _DL ≥μ _UL In the case of (a), the first time unit set is set to include time unitsTime unitTime units in between.

Still taking fig. 6 as an example, if the first carrier is CC2 in fig. 6 and the first PDSCH is the PDSCH on CC2, then the time domain position of the first PDSCH is located in time slot { (8- {1,2,4 }) ×1} = time slot {4,6,7} (corresponding to the first set of time units mentioned above). Alternatively, the terminal device does not expect PDSCH on CC2 to be scheduled in slots other than slots {4,6,7} of CC 2.

If the first carrier is CC3 in fig. 6 and the first PDSCH is a PDSCH on CC3, then the time domain location of the first PDSCH is in time slots { (8- {1,2,4 }) ×2} - { (8- {1,2,4 }) ×2+2-1} = time slots {8,9,12,13,14,15} (corresponding to the first set of time elements mentioned above). Alternatively, the terminal device does not expect PDSCH on CC3 to be scheduled in slots other than slots {8,9,12,13,14,15} of CC 3.

It should be appreciated that the above-described first and second implementations may be combined with each other without conflict. For example, in some embodiments, if μ _DL ＜μ _UL A first set of time units may be determined in an implementation; if mu _DL ≥μ _UL Implementation two may be employed to determine the first set of time units.

In the second implementation manner, the scheduling and feedback frames of the Type-1HARQ-ACK codebook are multiplexed as much as possible, and a feedback window (corresponding to the first time unit set) is not required to be designed completely, and only the relation of subcarrier spacing between the PDSCH and the PUCCH is required to be combined for adaptive adjustment. The implementation mode has good compatibility with the current protocol, and the terminal equipment is simple to implement.

And the implementation mode is three:

the first set of time units may include all time units overlapping the second set of time units. The second set of time units referred to herein may be time units determined based on the time domain position of the PUCCH and the feedback timing set. For example, the second set of time units is the time slot { n-k1} on the second carrier. Where n represents a time unit in which the PUCCH is located, and k1 represents an element in the feedback timing set of the terminal device. The range of values of k1 may be all elements in the feedback timing set. Taking the example that PUCCH is located in slot n, if the feedback timing set k1= {1,2,3,4,7,8}, the second time unit set may include slots { n-1, n-2, n-3, n-4, n-7, n-8}.

In some embodiments, the first set of time units may employ this implementation three determination if the second carrier has sub-slots as the basic units of HARQ timing. Furthermore, if the second carrier has a sub-slot as a basic unit of HARQ timing, the first set of time units may be used to define a time domain position of a last symbol of the first PDSCH. That is, the last symbol of the first PDSCH is located within the first set of time units. Alternatively, the terminal device does not expect the last symbol of the first PDSCH to be located in a time cell of the first carrier other than the first set of time cells.

A more specific example is given below in connection with fig. 7. As shown in fig. 7, 3 carriers are set between the network device and the terminal device: CC1, CC2, CC3. Wherein, the subcarrier spacing of CC1 is 15kHz, the subcarrier spacing of CC2 is 30kHz, and the subcarrier spacing of CC3 is 60kHz. In addition, the feedback timing set configured by the network device for the terminal device is {1,2,3,4,7,8}. One slot in CC2 includes 2 sub-slots.

The terminal device receives a first DCI sent by the network device, wherein the first DCI is used for scheduling PDSCH of CC 1-CC 3. The 3 carriers may belong to the same PUCCH group. Therefore, HARQ-ACK information corresponding to PDSCH of the 3 carriers may be fed back through the same PUCCH. In the example of fig. 7, the PUCCH is located in the 1 st sub-slot of slot 8 on CC 2.

If the first PDSCH mentioned earlier is a PDSCH on CC1, the first set of time units may include the first half of slot 2 on CC1 and slot 3.

If the first PDSCH mentioned above is a PDSCH on CC2, the first set of time cells may be the same as the second set of time cells. I.e. the first set of time units may comprise two sub-slots of slot 4, two sub-slots of slot 6 and two sub-slots of slot 7 on CC 2.

If the first PDSCH mentioned above is a PDSCH on CC3, the first set of time elements may include slots {8,9,12,13,14,15} on CC 3.

The third implementation mode multiplexes the scheduling and feedback frames of the Type-1HARQ-ACK codebook as much as possible, and does not need to make a new design for a feedback window (corresponding to the first time unit set), and only needs to make an adaptive adjustment by combining the relation of subcarrier spacing between the PDSCH and the PUCCH. The implementation mode has good compatibility with the current protocol, and the terminal equipment is simple to implement.

Example two

The first set of time units may be determined based on a first reference time period. In some embodiments, the first reference time period may be determined based on the second subcarrier spacing (i.e., the subcarrier spacing of the PUCCH or the subcarrier spacing of the carrier in which the PUCCH is located). Alternatively, the first reference duration may be determined based on the PUCCH or a basic parameter set (numerology) of the carrier on which the PUCCH is located. For example, the length of the first reference time period may be set to 4 slots at the second subcarrier spacing. Further, the first reference duration may be determined based on the time domain position of the PUCCH at the time domain position. For example, the end time of the first reference duration may be set as the start time of the time unit where the PUCCH is located; alternatively, the end time of the first reference duration may be set as the end time of a time unit preceding the time unit in which the PUCCH is located (i.e., a preceding time unit adjacent in time domain to the time unit in which the PUCCH is located).

A more specific example is given below in connection with fig. 8. As shown in fig. 8, 3 carriers are set between the network device and the terminal device: CC1, CC2, CC3. Wherein, the subcarrier spacing of CC1 is 15kHz, the subcarrier spacing of CC2 is 30kHz, and the subcarrier spacing of CC3 is 60kHz.

The terminal device receives a first DCI sent by the network device, wherein the first DCI is used for scheduling PDSCH of CC 1-CC 3. The 3 carriers may belong to the same PUCCH group, and thus HARQ-ACK information corresponding to PDSCH of the 3 carriers may be fed back through the same PUCCH. In the example of fig. 8, the PUCCH is located in slot 8 on CC 2.

Since the PUCCH is located on CC2, the first reference duration may be defined based on the subcarrier spacing of CC 2. For example, the first reference time duration may be defined as 4 slots at a subcarrier spacing of 30 kHz. The end time of the first reference duration may be defined as a start time of a slot in which the PUCCH is located, or an end time of a slot preceding the slot in which the PUCCH is located.

On the basis of the above definition, referring to fig. 8, if the aforementioned first PDSCH is the PDSCH on CC1, the first time unit is the slot {2,3} on CC 1. Alternatively, the terminal device does not expect that PDSCH on CC1 is scheduled for slots other than slots {2,3} on CC 1. Similarly, if the first PDSCH mentioned above is PDSCH on CC2, the first time unit is slot {4,5,6,7} on CC 2. Alternatively, the terminal device does not expect that PDSCH on CC2 is scheduled for slots other than slots {4,5,6,7} on CC 2. Similarly, if the first PDSCH mentioned above is PDSCH on CC3, the first time unit is the slot {8,9,10,11,12,13,14,15} on CC3. Alternatively, the terminal device does not expect that PDSCH on CC3 is scheduled for slots other than slots {8,9,10,11,12,13,14,15} on CC3.

The second embodiment provides a brand new scheduling and feedback framework based on reference time length, and the carrier scheduling and feedback mode provided by the framework is unified relative to carriers with different subcarrier intervals, and is simple to implement.

Example III

The manner of determining the first time unit is described in detail above in connection with the first and second embodiments. The time domain resource indication manner of the M PDSCH is described in detail below in connection with the third embodiment. It should be appreciated that the time domain resource indication manner described in embodiment three may be implemented separately from the previously described embodiments.

As mentioned above, the M PDSCH may be located in M carriers, respectively. The network device may configure a set of TDRAs for each of the M carriers. In other words, the network device configures a set of TDRA for each carrier (or for each serving cell).

The set of TDRAs may be, for example, a TDRA table. The TDRA set may include one or more TDRA rows. Each TDRA row in the TDRA set may contain one or more of the following information: the time slot offset value k0, SLIV from the time slot of DCI to the time slot of PDSCH, and the mapping type of PDSCH.

In order to indicate time domain resources of the M PDSCH (or N PDSCH to which the M PDSCH belongs), a time domain resource indication field may be set in the first DCI. The time domain resource indication field may include one or more indexes. The one or more indexes may be used to indicate a TDRA row corresponding to each PDSCH of the M PDSCH (or the N PDSCH to which the M PDSCH belongs).

As an example, the time domain resource indication field may include M indexes that respectively indicate TDRA rows corresponding to the M PDSCH (or N PDSCH to which the M PDSCH belongs). This implementation of the time domain resource indication domain has a high flexibility.

As another example, the time domain resource indication field may include an index. The index is used to indicate a TDRA row corresponding to each PDSCH of the M PDSCHs (or the N PDSCHs to which the M PDSCHs belong). For example, the time domain resource indication field may include an index M, where the index M may indicate M PDSCH's respectively corresponding to m+1st row of M TDRA sets (e.g., TDRA tables), where the M TDRA sets refer to TDRA sets configured by the network device for M carriers (or serving cells). Such implementation of the time domain resource indication field can indicate the time domain resources of multiple carriers with fewer bits, so that DCI overhead can be saved.

A more specific example is given below in connection with fig. 9 (including fig. 9A and 9B).

The network device configures 3 carriers (or 3 serving cells) for the terminal device and configures a set of TDRA for each of the 3 carriers. It is assumed that the set of TDRAs configured for each of the 3 carriers includes two TDRA rows, each TDRA row including a slot offset value k0. Wherein, the time slot offset value k0 of the TDRA set corresponding to the carrier 1 is {1,2}; the time slot offset value k0 of the TDRA set corresponding to the carrier 2 is {1,3}; the slot offset value k0 of the TDRA set corresponding to carrier 3 is {2,4}.

In the example of fig. 9, the first DCI schedules PDSCH of 3 carriers simultaneously, and the slot offset value k1=1 from the slot in which the last scheduled PDSCH of the first DCI is located to the slot in which the PUCCH is located (PUCCH is not shown in fig. 9, and is located in slot n in fig. 9).

In the example of fig. 9, the time domain resource indication field of the first DCI may include 1 bit. The values of the time domain resource indication domains are respectively 0 and 1. If the value of the time domain resource indication domain is 0, the first DCI may simultaneously indicate that PDSCH on 3 carriers respectively corresponds to the 1 st row of the TDRA set configured by each of the 3 carriers. Therefore, the slot offset value k0 of PDSCH of the 3 carriers is {1, 2} as shown in fig. 9A. If the value of the time domain resource indication domain is 1, the first DCI may simultaneously indicate that PDSCH on 3 carriers respectively corresponds to row 2 of the TDRA set configured by each of the 3 carriers. Therefore, the slot offset value k0 of PDSCH of the 3 carriers is {2,3,4}, respectively, as shown in fig. 9B.

Method embodiments of the present application are described above in detail in connection with fig. 1-9, and apparatus embodiments of the present application are described below in detail in connection with fig. 10-12. It is to be understood that the description of the method embodiments corresponds to the description of the device embodiments, and that parts not described in detail can therefore be seen in the preceding method embodiments.

Fig. 10 is a schematic structural diagram of a terminal device provided in an embodiment of the present application. Terminal device 1000 of fig. 10 includes a receiving unit 1010. The receiving unit 1010 is configured to receive a first DCI. The first DCI is used for scheduling N PDSCH, HARQ-ACK information corresponding to M PDSCH in the N PDSCH is fed back in the same PUCCH, and M and N are positive integers; wherein the M PDSCH includes a first PDSCH whose time domain location is associated with a first set of time units determined based on at least one of: the feedback time sequence set of the terminal equipment comprises a first subcarrier interval and a second subcarrier interval; the first subcarrier interval is a subcarrier interval of the first PDSCH or a subcarrier interval of a first carrier in which the first PDSCH is located, and the second subcarrier interval is a subcarrier interval of the PUCCH or a subcarrier interval of a second carrier in which the PUCCH is located.

Optionally, in some embodiments, terminal device 1000 can include feedback unit 1020. The feedback unit 1020 may be configured to feed back HARQ-ACK information corresponding to the M PDSCH to the network device through the PUCCH.

Optionally, the first time unit set is determined based on a first parameter and/or a second parameter, wherein the first parameter is n-k1 and the second parameter is Or (b)The n represents a time unit where the PUCCH is located, the k1 represents an element in the feedback timing set, and the μ _DL Representing the first subcarrier spacing, the μ _UL Representing the second subcarrier spacing.

Optionally, the first set of time units comprises time unitsWherein the method comprises the steps ofRepresenting a rounding down.

Optionally, the value range of k1 is an element satisfying the following formula in the feedback timing set: where mod (·) represents the remainder operation.

Optionally, aSaid mu _DL Less than the mu _UL 。

Optionally, the first set of time units comprises time unitsTime unit Time units in between.

Optionally, the μ _DL Greater than or equal to the mu _UL 。

Optionally, the first set of time units includes at least one time unit on the first carrier, and the at least one time unit overlaps in time domain with a time unit in a second set of time units, the second set of time units being determined based on a time domain position of the PUCCH and the feedback timing set.

Optionally, the second time unit set is a time unit { n-k1} on the second carrier, where n represents a slot where the PUCCH is located, and k1 represents an element in the feedback timing set.

Optionally, the first set of time units is determined based on a first reference time length, which is determined based on the second subcarrier spacing.

Optionally, the ending time of the first reference duration is the starting time of the time unit where the PUCCH is located; or, the end time of the first reference duration is the end time of the time unit before the time unit where the PUCCH is located.

Optionally, the first PDSCH is located on the first carrier, and the terminal device does not expect the first PDSCH to be located on time cells other than the first set of time cells on the first carrier; alternatively, the terminal device does not expect the last symbol of the first PDSCH to be located in a time cell on the first carrier other than the first set of time cells.

Optionally, the N PDSCH are located on N carriers, and the M PDSCH are located on M carriers of the N carriers, respectively.

Optionally, the M carriers belong to the same PUCCH group.

Optionally, the first DCI includes a time domain resource indication field, where the time domain resource indication field includes an index, where the index is used to indicate a TDRA row corresponding to each PDSCH of the M PDSCHs or a TDRA row corresponding to each PDSCH of the N PDSCHs.

Optionally, the first DCI includes a PDSCH-to-HARQ feedback timing indication, where the PDSCH-to-HARQ feedback timing indication is used to indicate an offset value from a time unit where an xth PDSCH of the M PDSCHs is located to a time unit where the PUCCH is located.

Optionally, the xth PDSCH is one of the PDSCH satisfying the following condition among the M PDSCH: the first PDSCH scheduled, the last PDSCH scheduled, the PDSCH with the smallest associated serving cell index, or the PDSCH with the largest associated serving cell index.

Optionally, the last scheduled PDSCH is a PDSCH with the latest end time among the M PDSCHs; the ending time is the transmission ending time of the PDSCH, or the ending time is the ending time of a time unit where the PDSCH is located.

Optionally, the time units in the first set of time units are a combination of one or more of: time slots, sub-slots, and one or more symbols.

Fig. 11 is a schematic structural diagram of a network device according to an embodiment of the present application. The network device 1100 of fig. 11 includes a transmitting unit 1110. The transmitting unit 1110 is configured to transmit the first DCI. The first DCI is used for scheduling N PDSCH, HARQ-ACK information corresponding to M PDSCH in the N PDSCH is fed back in the same PUCCH, and M and N are positive integers; wherein the M PDSCH includes a first PDSCH whose time domain location is associated with a first set of time units determined based on at least one of: the feedback time sequence set of the terminal equipment comprises a first subcarrier interval and a second subcarrier interval; the first subcarrier interval is a subcarrier interval of the first PDSCH or a subcarrier interval of a first carrier in which the first PDSCH is located, and the second subcarrier interval is a subcarrier interval of the PUCCH or a subcarrier interval of a second carrier in which the PUCCH is located.

Optionally, in some embodiments, the network device 1100 may include a receiving unit 1120. The receiving unit 1120 may be configured to receive HARQ-ACK information corresponding to the M PDSCH fed back by the terminal device through the PUCCH.

Optionally, the first time unit set is determined based on a first parameter and/or a second parameter, wherein the first parameter is n-k1 and the second parameter isOr (b)The n represents a time unit where the PUCCH is located, the k1 represents an element in the feedback timing set, and the μ _DL Representing the first subcarrier spacing, the μ _UL Representing the second subcarrier spacing.

Optionally, the μ _DL Less than the mu _UL 。

Optionally, the μ _DL Greater than or equal to the mu _UL 。

Optionally, the M carriers belong to the same PUCCH group.

Fig. 12 is a schematic structural view of an apparatus of an embodiment of the present application. The dashed lines in fig. 12 indicate that the unit or module is optional. The apparatus 1200 may be used to implement the methods described in the method embodiments above. The apparatus 1200 may be a chip, a terminal device, or a network device.

The apparatus 1200 may include one or more processors 1210. The processor 1210 may support the apparatus 1200 to implement the methods described in the method embodiments above. The processor 1210 may be a general-purpose processor or a special-purpose processor. For example, the processor may be a central processing unit (central processing unit, CPU). Alternatively, the processor may be another general purpose processor, a digital signal processor (digital signal processor, DSP), an application specific integrated circuit (application specific integrated circuit, ASIC), an off-the-shelf programmable gate array (field programmable gate array, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

The apparatus 1200 may also include one or more memories 1220. The memory 1220 has stored thereon a program that can be executed by the processor 1210 to cause the processor 1210 to perform the method described in the method embodiments above. The memory 1220 may be separate from the processor 1210 or may be integrated in the processor 1210.

The apparatus 1200 may also include a transceiver 1230. Processor 1210 may communicate with other devices or chips through transceiver 1230. For example, the processor 1210 may transmit and receive data to and from other devices or chips through the transceiver 1230. Taking the apparatus 1200 as the terminal device 1000 in the foregoing, the transceiver 1230 may refer to the receiving unit 1010 or the feedback unit 1020 of the terminal device 1000. Alternatively, the functions of the receiving unit 1010 or the feedback unit 1020 may be implemented by the transceiver 1230. Taking the apparatus 1200 as the network device 1100 in the foregoing, the transceiver 1230 may refer to the transmitting unit 1110 and the receiving unit 1120 of the network device 1100. Alternatively, the functions of the transmitting unit 1110 and the receiving unit 1120 may be implemented by the transceiver 1230.

The embodiment of the application also provides a computer readable storage medium for storing a program. The computer-readable storage medium may be applied to a terminal device or a network device provided in the embodiments of the present application, and the program causes a computer to execute the method performed by the terminal device or the network device in the embodiments of the present application.

Embodiments of the present application also provide a computer program product. The computer program product includes a program. The computer program product may be applied to a terminal device or a network device provided in embodiments of the present application, and the program causes a computer to execute the method performed by the terminal device or the network device in the embodiments of the present application.

The embodiment of the application also provides a computer program. The computer program is applicable to the terminal device or the network device provided in the embodiments of the present application, and causes the computer to execute the method executed by the terminal device or the network device in the embodiments of the present application.

It should be understood that in the embodiments of the present application, "B corresponding to a" means that B is associated with a, from which B may be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may also determine B from a and/or other information.

It should be understood that the term "and/or" is merely an association relationship describing the associated object, and means that three relationships may exist, for example, a and/or B may mean: 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.

It should be understood that, in various embodiments of the present application, the sequence numbers of the foregoing processes do not mean the order of execution, and the order of execution of the processes should be determined by the functions and internal logic thereof, and should not constitute any limitation on the implementation process of the embodiments of the present application.

In the several embodiments provided in this 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 each embodiment 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.

In the above embodiments, it 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 instructions. When loaded and executed on a computer, produces a flow or function in accordance with embodiments of the present application, 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 instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by a wired (e.g., coaxial cable, fiber optic, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be read by a computer or a data storage device such as a server, data center, etc. that contains an integration of one or more available media. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a digital versatile disk (digital video disc, DVD)), or a semiconductor medium (e.g., a Solid State Disk (SSD)), or the like.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by 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

A method of wireless communication, comprising:

the method comprises the steps that a terminal device receives first downlink control information DCI, wherein the first DCI is used for scheduling N physical downlink shared channels PDSCH, hybrid automatic repeat request-acknowledgement HARQ-ACK information corresponding to M PDSCH in the N PDSCHs is fed back by the same physical uplink control channel PUCCH, and M and N are positive integers;

wherein the M PDSCH includes a first PDSCH whose time domain location is associated with a first set of time units determined based on at least one of: the feedback time sequence set of the terminal equipment comprises a first subcarrier interval and a second subcarrier interval;

the first subcarrier interval is a subcarrier interval of the first PDSCH or a subcarrier interval of a first carrier in which the first PDSCH is located, and the second subcarrier interval is a subcarrier interval of the PUCCH or a subcarrier interval of a second carrier in which the PUCCH is located.
The method of claim 1, wherein the N PDSCH are located on N carriers, respectively, and the M PDSCH are located on M carriers of the N carriers, respectively.
The method of claim 2, wherein the M carriers belong to the same PUCCH group.
A method according to any of claims 1-3, characterized in that the first set of time units is determined based on a first parameter and/or a second parameter, wherein the first parameter is n-k1 and the second parameter isOr (b)The n represents a time unit where the PUCCH is located, the k1 represents an element in the feedback timing set, and the μ _DL Representing the first subcarrier spacing, the μ _UL Representing the second subcarrier spacing.
The method of claim 4, wherein the first set of time units comprises time units Wherein the method comprises the steps ofRepresenting a rounding down.
The method of claim 5, wherein the range of values of k1 is an element in the feedback timing set that satisfies the following formula:where mod (·) represents the remainder operation.
The method of claim 5 or 6, wherein μ is _DL Less than the mu _UL 。
The method of claim 4, wherein the first set of time units comprises time units Time unitTime units in between.
The method of claim 8, wherein the μ is _DL Greater than or equal to the mu _UL 。
The method of any of claims 1-9, wherein a time unit of the first set of time units comprises at least one time unit on the first carrier, and the at least one time unit overlaps in time domain with a time unit of a second set of time units determined based on a time domain position of the PUCCH and the feedback timing set.
The method of claim 10, wherein the second set of time units is a time unit { n-k1} on the second carrier, where n represents a slot in which the PUCCH is located, and k1 represents an element in the feedback timing set.
The method of any of claims 1-3, wherein the first set of time units is determined based on a first reference time duration, the first reference time duration being determined based on the second subcarrier spacing.
The method of claim 12, wherein the ending time of the first reference duration is a starting time of a time unit where the PUCCH is located; or, the end time of the first reference duration is the end time of the time unit before the time unit where the PUCCH is located.
The method of any of claims 1-13, wherein the first PDSCH is located on the first carrier and the terminal device does not expect the first PDSCH to be located on a time cell of the first carrier other than the first set of time cells; alternatively, the terminal device does not expect the last symbol of the first PDSCH to be located in a time cell on the first carrier other than the first set of time cells.
The method of any of claims 1-14, wherein the first DCI comprises a time-domain resource indication field including an index indicating a time-domain resource allocation, TDRA, row corresponding to each PDSCH of the M PDSCH or a TDRA row corresponding to each PDSCH of the N PDSCH.
The method of any of claims 1-15, wherein the first DCI includes a PDSCH-to-HARQ feedback timing indication indicating an offset value of a time cell in which an xth PDSCH of the M PDSCH is located to a time cell in which the PUCCH is located;

Wherein the xth PDSCH is one of the PDSCH satisfying the following condition among the M PDSCH: the first PDSCH scheduled, the last PDSCH scheduled, the PDSCH with the smallest associated serving cell index, or the PDSCH with the largest associated serving cell index.
The method of claim 16, wherein the last scheduled PDSCH is a last PDSCH of the M PDSCH's ending time; the ending time is the transmission ending time of the PDSCH, or the ending time is the ending time of a time unit where the PDSCH is located.
The method of any one of claims 1-17, wherein the time units in the first set of time units are a combination of one or more of: time slots, sub-slots, and one or more symbols.
A method of wireless communication, comprising:

the network equipment sends first downlink control information DCI, wherein the first DCI is used for scheduling N Physical Downlink Shared Channels (PDSCH), the hybrid automatic repeat request-acknowledgement (HARQ-ACK) information corresponding to M PDSCH in the N PDSCHs is fed back by the same Physical Uplink Control Channel (PUCCH), and M and N are both positive integers;

Wherein the M PDSCH includes a first PDSCH whose time domain location is associated with a first set of time units determined based on at least one of: the feedback time sequence set of the terminal equipment comprises a first subcarrier interval and a second subcarrier interval;

the first subcarrier interval is a subcarrier interval of the first PDSCH or a subcarrier interval of a first carrier in which the first PDSCH is located, and the second subcarrier interval is a subcarrier interval of the PUCCH or a subcarrier interval of a second carrier in which the PUCCH is located.
The method of claim 19, wherein the N PDSCH are located on N carriers, respectively, and the M PDSCH are located on M carriers of the N carriers, respectively.
The method of claim 20, wherein the M carriers belong to the same PUCCH group.
The method according to any of claims 19-21, wherein the first set of time units is determined based on a first parameter and/or a second parameter, wherein the first parameter is n-k1 and the second parameter isOr (b)The n represents a time unit where the PUCCH is located, the k1 represents an element in the feedback timing set, and the μ _DL Representing the first subcarrier spacing, the μ _UL Representing the second subcarrier spacing.
The method of claim 22, wherein the first set of time units comprises time unitsWherein the method comprises the steps of Representing a rounding down.
The method of claim 23, wherein the range of values of k1 is an element in the feedback timing set that satisfies the following formula:where mod (·) represents the remainder operation.
The method of claim 23 or 24, wherein μ is _DL Less than the mu _UL 。
The method of claim 22, wherein the first set of time units comprises time units Time unitTime units in between.
The method of claim 26, wherein μ is _DL Greater than or equal to the mu _UL 。
The method of any of claims 19-27, wherein the first set of time units comprises at least one time unit on the first carrier and the at least one time unit overlaps in time domain with a time unit in a second set of time units determined based on a time domain position of the PUCCH and the feedback timing set.
The method of claim 28, wherein the second set of time units is a time unit { n-k1} on the second carrier, where n represents a slot in which the PUCCH is located, and k1 represents an element in the feedback timing set.
The method of any of claims 19-21, wherein the first set of time units is determined based on a first reference time duration, the first reference time duration being determined based on the second subcarrier spacing.
The method of claim 30, wherein the ending time of the first reference duration is a starting time of a time unit where the PUCCH is located; or, the end time of the first reference duration is the end time of the time unit before the time unit where the PUCCH is located.
The method of any of claims 19-31, wherein the first PDSCH is located on the first carrier and the terminal device does not expect the first PDSCH to be located on a time cell of the first carrier other than the first set of time cells; alternatively, the terminal device does not expect the last symbol of the first PDSCH to be located in a time cell on the first carrier other than the first set of time cells.
The method of any of claims 19-32, wherein the first DCI includes a time-domain resource indication field including an index indicating a time-domain resource allocation, TDRA, row corresponding to each PDSCH of the M PDSCH or a TDRA row corresponding to each PDSCH of the N PDSCH.
The method of any of claims 19-33, wherein the first DCI includes a PDSCH-to-HARQ feedback timing indication indicating an offset value of a time cell in which an xth PDSCH of the M PDSCH is located to a time cell in which the PUCCH is located;

wherein the xth PDSCH is one of the PDSCH satisfying the following condition among the M PDSCH: the first PDSCH scheduled, the last PDSCH scheduled, the PDSCH with the smallest associated serving cell index, or the PDSCH with the largest associated serving cell index.
The method of claim 34, wherein the last scheduled PDSCH is a last PDSCH of the M PDSCH's ending time; the ending time is the transmission ending time of the PDSCH, or the ending time is the ending time of a time unit where the PDSCH is located.
The method of any one of claims 19-35, wherein the time units in the first set of time units are a combination of one or more of: time slots, sub-slots, and one or more symbols.
A terminal device, comprising:

a receiving unit, configured to receive first downlink control information DCI, where the first DCI is used to schedule N physical downlink shared channels PDSCH, hybrid automatic repeat request-acknowledgement HARQ-ACK information corresponding to M PDSCH in the N PDSCH is fed back by the same physical uplink control channel PUCCH, and M and N are both positive integers;

wherein the M PDSCH includes a first PDSCH whose time domain location is associated with a first set of time units determined based on at least one of: the feedback time sequence set of the terminal equipment comprises a first subcarrier interval and a second subcarrier interval;

the first subcarrier interval is a subcarrier interval of the first PDSCH or a subcarrier interval of a first carrier in which the first PDSCH is located, and the second subcarrier interval is a subcarrier interval of the PUCCH or a subcarrier interval of a second carrier in which the PUCCH is located.
The terminal device of claim 37, wherein the N PDSCH are located on N carriers, respectively, and the M PDSCH are located on M carriers of the N carriers, respectively.
The terminal device of claim 38, wherein the M carriers belong to the same PUCCH group.
The terminal device according to any of the claims 37-39, wherein the first set of time units is determined based on a first parameter and/or a second parameter, wherein the first parameter is n-k1 and the second parameter isOr (b)The n represents a time unit where the PUCCH is located, the k1 represents an element in the feedback timing set, and the μ _DL Representing the first subcarrier spacing, the μ _UL Representing the second subcarrier spacing.
The terminal device of claim 40, wherein the first set of time units comprises time unitsWherein the method comprises the steps ofRepresenting a rounding down.
The terminal device of claim 41, wherein the range of values of k1 is an element in the feedback timing set that satisfies the following formula:where mod (·) represents the remainder operation.
Terminal device according to claim 41 or 42, characterized in that the μ _DL Less than the mu _UL 。
The terminal device of claim 40, wherein the first set of time units comprises time unitsTime unitTime units in between.
The terminal device of claim 44, wherein the μ is _DL Greater than or equal to the mu _UL 。
The terminal device of any of claims 37-45, wherein the first set of time units comprises at least one time unit on the first carrier and the at least one time unit overlaps in time domain with a time unit in a second set of time units determined based on a time domain position of the PUCCH and the feedback timing set.
The terminal device of claim 46, wherein the second set of time units is a time unit { n-k1} on the second carrier, the n representing a slot in which the PUCCH is located, the k1 representing an element in the feedback timing set.
The terminal device of any of claims 37-39, wherein the first set of time units is determined based on a first reference time duration, the first reference time duration being determined based on the second subcarrier spacing.
The terminal device of claim 48, wherein the ending time of the first reference duration is a starting time of a time unit in which the PUCCH is located; or, the end time of the first reference duration is the end time of the time unit before the time unit where the PUCCH is located.
The terminal device of any of claims 37-49, wherein the first PDSCH is on the first carrier and the terminal device does not expect the first PDSCH to be on a time cell on the first carrier other than the first set of time cells; alternatively, the terminal device does not expect the last symbol of the first PDSCH to be located in a time cell on the first carrier other than the first set of time cells.
The terminal device of any of claims 37-50, wherein the first DCI includes a time-domain resource indication field including an index indicating a time-domain resource allocation, TDRA, row corresponding to each PDSCH of the M PDSCH or a TDRA row corresponding to each PDSCH of the N PDSCH.
The terminal device of any of claims 37-51, wherein the first DCI includes a PDSCH-to-HARQ feedback timing indication indicating an offset value of a time cell in which an xth PDSCH of the M PDSCHs is located to a time cell in which the PUCCH is located;

Wherein the xth PDSCH is one of the PDSCH satisfying the following condition among the M PDSCH: the first PDSCH scheduled, the last PDSCH scheduled, the PDSCH with the smallest associated serving cell index, or the PDSCH with the largest associated serving cell index.
The terminal of claim 52, wherein the last scheduled PDSCH is a last PDSCH of the M PDSCHs with a latest end time; the ending time is the transmission ending time of the PDSCH, or the ending time is the ending time of a time unit where the PDSCH is located.
The terminal device of any of claims 37-53, wherein the time units in the first set of time units are a combination of one or more of: time slots, sub-slots, and one or more symbols.
A network device, comprising:

a sending unit, configured to send first downlink control information DCI, where the first DCI is used to schedule N physical downlink shared channels PDSCH, hybrid automatic repeat request-acknowledgement HARQ-ACK information corresponding to M PDSCH in the N PDSCH is fed back by the same physical uplink control channel PUCCH, and M and N are both positive integers;

Wherein the M PDSCH includes a first PDSCH whose time domain location is associated with a first set of time units determined based on at least one of: the feedback time sequence set of the terminal equipment comprises a first subcarrier interval and a second subcarrier interval;

the first subcarrier interval is a subcarrier interval of the first PDSCH or a subcarrier interval of a first carrier in which the first PDSCH is located, and the second subcarrier interval is a subcarrier interval of the PUCCH or a subcarrier interval of a second carrier in which the PUCCH is located.
The network device of claim 55, wherein the N PDSCH are on N carriers, respectively, and the M PDSCH are on M carriers of the N carriers, respectively.
The network device of claim 56, wherein the M carriers belong to the same PUCCH group.
The network device of claim 57, wherein the first set of time units is determined based on a first parameter and/or a second parameter, wherein the first parameter is n-k1 and the second parameter isOr (b)The n represents a time unit where the PUCCH is located, the k1 represents an element in the feedback timing set, and the μ _DL Representing the first subcarrier spacing, the μ _UL Representing the second subcarrier spacing.
The network device of claim 58, wherein the first set of time units comprises time unitsWherein the method comprises the steps ofRepresenting a rounding down.
The network device of claim 59, wherein the range of values of k1 is an element in the feedback timing set that satisfies the following equation:where mod (·) represents the remainder operation.
The network device of claim 59 or 60, wherein the μ is _DL Less than the mu _UL 。
The network device of claim 58, wherein the first set of time units comprises time unitsTime unitTime units in between.
The network device of claim 62, wherein the μ is _DL Greater than or equal to the mu _UL 。
The network device of any of claims 55-63, wherein the first set of time units comprises at least one time unit on the first carrier and the at least one time unit overlaps in time domain with a time unit in a second set of time units determined based on a time domain position of the PUCCH and the feedback timing set.
The network device of claim 64, wherein the second set of time units is a time unit { n-k1} on the second carrier, the n representing a time slot in which the PUCCH is located, the k1 representing an element in the feedback timing set.
The network device of any of claims 55-57, wherein the first set of time units is determined based on a first reference time duration, the first reference time duration being determined based on the second subcarrier spacing.
The network device of claim 66, wherein the end time of the first reference duration is a start time of a time unit in which the PUCCH is located; or, the end time of the first reference duration is the end time of the time unit before the time unit where the PUCCH is located.
The network device of any one of claims 55-67, wherein the first PDSCH is on the first carrier and the terminal device does not expect the first PDSCH to be on a time cell on the first carrier other than the first set of time cells; alternatively, the terminal device does not expect the last symbol of the first PDSCH to be located in a time cell on the first carrier other than the first set of time cells.
The network device of any one of claims 55-68, wherein the first DCI includes a time-domain resource indication field including an index indicating a time-domain resource allocation, TDRA, row corresponding to each PDSCH of the M PDSCHs or a TDRA row corresponding to each PDSCH of the N PDSCHs.
The network device of any one of claims 55-69, wherein the first DCI includes a PDSCH-to-HARQ feedback timing indication indicating an offset value of a time cell in which an xth PDSCH of the M PDSCHs is located to a time cell in which the PUCCH is located;

wherein the xth PDSCH is one of the PDSCH satisfying the following condition among the M PDSCH: the first PDSCH scheduled, the last PDSCH scheduled, the PDSCH with the smallest associated serving cell index, or the PDSCH with the largest associated serving cell index.
The network device of claim 70, wherein the last scheduled PDSCH is a last PDSCH of the M PDSCHs ending in a latest time; the ending time is the transmission ending time of the PDSCH, or the ending time is the ending time of a time unit where the PDSCH is located.
The network device of any one of claims 55-71, wherein the time units in the first set of time units are a combination of one or more of: time slots, sub-slots, and one or more symbols.
A terminal device comprising a memory for storing a program and a processor for invoking the program in the memory to perform the method of any of claims 1-18.
A network device comprising a memory for storing a program and a processor for invoking the program in the memory to perform the method of any of claims 19-36.
An apparatus comprising a processor configured to invoke a program from memory to perform the method of any of claims 1-18.
An apparatus comprising a processor to invoke a program from memory to perform the method of any of claims 19-36.
A chip comprising a processor for calling a program from a memory, causing a device on which the chip is mounted to perform the method of any one of claims 1-18.
A chip comprising a processor for calling a program from a memory, causing a device on which the chip is mounted to perform the method of any of claims 19-36.
A computer-readable storage medium, having stored thereon a program that causes a computer to perform the method of any of claims 1-18.
A computer-readable storage medium, having stored thereon a program that causes a computer to perform the method of any of claims 19-36.
A computer program product comprising a program for causing a computer to perform the method of any one of claims 1-18.
A computer program product comprising a program for causing a computer to perform the method of any one of claims 19-36.
A computer program, characterized in that the computer program causes a computer to perform the method according to any one of claims 1-18.
A computer program, characterized in that the computer program causes a computer to perform the method according to any of claims 19-36.