CN110351019B

CN110351019B - Communication method and device

Info

Publication number: CN110351019B
Application number: CN201810302188.3A
Authority: CN
Inventors: 薛祎凡; 彭金磷; 王键; 刘海涛
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2018-04-04
Filing date: 2018-04-04
Publication date: 2020-12-15
Anticipated expiration: 2038-04-04
Also published as: CN110351019A; WO2019192457A1

Abstract

The embodiment of the application provides a communication method and a device, wherein the method comprises the following steps: the terminal determines a second time domain resource according to the first time domain resource and the first information; the first time domain resource is a time domain resource of a PDSCH candidate position, the second time domain resource is a time domain resource of a PDCCH candidate position, and the first information comprises or indicates a time interval between the PDSCH candidate position and the PDCCH candidate position; searching a PDCCH monitoring opportunity on at least one downlink BWP within a time range corresponding to the second time domain resource; the at least one downstream BWP comprises: and the network device configures all downlink BWPs to the terminal, or all downlink BWPs configured to the terminal by the network device and activated in a time range corresponding to the second time domain resource. Therefore, all PDCCH monitoring opportunities corresponding to the PDSCH can be searched, so that the PDCCH monitoring opportunities are prevented from being missed and data confirmation information of downlink data is prevented from being missed, and the communication quality is improved.

Description

Communication method and device

Technical Field

The embodiment of the application relates to the technical field of communication, in particular to a communication method and device.

Background

Generally, a receiving end sends data acknowledgement information to a sending end after receiving data sent by the sending end, if the data received by the receiving end is error-free, the data acknowledgement information sent by the receiving end to the sending end is positive acknowledgement information (ACK), and if the data received by the receiving end is error-free, the data acknowledgement information sent by the receiving end to the sending end is negative acknowledgement information (NACK). Taking downlink transmission between the base station and the terminal as an example, when the terminal feeds back data acknowledgement information to the base station, the terminal may feed back data acknowledgement information of multiple Physical Downlink Shared Channels (PDSCHs) (used for carrying downlink data) to the base station at the same time. In the prior art, it may be determined in a semi-static manner which PDSCHs have their data acknowledgment information simultaneously fed back to the base station, and the specific process is as follows: according to the time interval between the configured PDSCH and the corresponding data confirmation information, the time interval between the PDSCH and the PDCCH, and the symbol of the PDSCH candidate position in each time slot, the time slot of the PDCCH candidate position is determined, then PDCCH monitoring opportunities (PDCCH monitoring opportunities) are searched in the time slot of the Physical Downlink Control Channel (PDCCH) candidate position, and then the data determination information of the PDSCH corresponding to the searched PDCCH monitoring opportunities is determined to be fed back to the base station at the same time.

In a 5G system, the system bandwidth may be large, for example, 200MHz or 400MHz, and some terminals may not support the large bandwidth, so that the base station may configure a bandwidth part (BWP) to the terminal, that is, the base station and the terminal occupy a part of the bandwidth (for example, 20MHz) in the system bandwidth for communication. The network device may configure a plurality of DL BWPs and a plurality of UL BWPs for the terminal, and activate at least one DL BWP and at least one UL BWP, where the terminal receives a Downlink signal sent by the base station on the activated DL BWP (i.e., active DL BWP); the terminal transmits an uplink signal on the activated UL BWP. When the base station communicates with the terminal on the active DL BWP and UL BWP, the base station may activate another BWP (DL or UL) to cause the terminal to switch (switch) to receive or transmit data on the new active BWP. Currently, the DCI (scheduling DCI) for scheduling data is used to perform switching (switching) of BWP, wherein the DCI is carried on the PDCCH. For example, the terminal receives a PDCCH (bearer DCI) on downlink BWP0, and the DCI schedules the terminal to receive data on downlink BWP1, at this time, the terminal switches from downlink BWP0 to downlink BWP1, that is, the activated BWP is switched from BWP0 to BWP1, and then the terminal receives the data on downlink BWP1 and sends data acknowledgement information of multiple PDSCHs to the network device on downlink BWP 1. Since only the downlink BWP1 is activated at this time, the terminal may search on the downlink BWP1 whether there is a PDCCH monitoring opportunity, but if the PDCCH is transmitted on the downlink BWP0 and the PDSCH scheduled by the PDCCH is transmitted on the downlink BWP1, the PDCCH monitoring opportunity corresponding to the PDSCH may not be searched on the downlink BWP 1.

Disclosure of Invention

The application provides a communication method and a communication device, which are used for avoiding the phenomenon of missing PDCCH monitoring opportunities.

In a first aspect, an embodiment of the present application provides a communication method, including: the terminal determines a second time domain resource according to the first time domain resource and the first information; the first time domain resource is a time domain resource of a PDSCH candidate position, the second time domain resource is a time domain resource of a PDCCH candidate position, and the first information comprises or indicates a time interval between the PDSCH candidate position and the PDCCH candidate position; and then the terminal searches the PDCCH monitoring opportunity on at least one downlink BWP within the time range corresponding to the second time domain resource.

Wherein the at least one downlink BWP comprises: all downlink BWPs configured by the network device to the terminal, or the at least one downlink BWP includes: and the network equipment configures all the downlink BWPs to the terminal and activates the downlink BWPs in the time range corresponding to the second time domain resource.

In a first embodiment of the first aspect, the searching, by the terminal, for a PDCCH monitoring opportunity on at least one downlink BWP within a time range corresponding to the second time domain resource includes: and the terminal searches the PDCCH monitoring opportunity on each downlink BWP in the time domain resources on each downlink BWP in the at least one downlink BWP corresponding to the second time domain resource.

According to the first aspect or the first embodiment of the first aspect, in a second embodiment of the first aspect, the terminal receives the PDSCH before determining the second time domain resource according to the first time domain resource and the first information, and then determines the first time domain resource according to the time domain resources used for transmitting the data acknowledgement information corresponding to the PDSCH and M time intervals between the PDSCH and the data acknowledgement information, where M is an integer greater than or equal to 1.

Wherein the determined first time domain resource comprises: the corresponding time domain resource on the first activated downlink BWP.

According to the second embodiment of the first aspect, in the third embodiment of the first aspect, the determining, by the terminal, the first time domain resource according to the time domain resource used for transmitting the data acknowledgement information corresponding to the PDSCH and the M time intervals between the PDSCH and the data acknowledgement information includes:

for each of the M time intervals, if the time domain resource for transmitting the data acknowledgement information corresponding to the PDSCH is an nth time domain resource unit, and a qth time interval of the M time intervals is K_1,QA time domain resource unit, the terminal determines that the first time domain resource comprises the (n-K) th time domain resource_1,Q) A time domain resource unit. The first time domain resource comprises M time domain resource units, and Q is a positive integer less than or equal to M.

According to the first aspect or any one of the first to third embodiments of the first aspect, in a fourth embodiment of the first aspect, before determining the second time domain resource according to the first time domain resource and the first information, the terminal determines J valid PDSCH candidate positions from the I PDSCH candidate positions according to the I PDSCH candidate positions configured in each time domain resource unit on the first activated downlink BWP and the uplink and downlink format in each time domain resource unit, and then determines the first information according to the J valid PDSCH candidate positions. The I is an integer greater than or equal to 1, and the J is an integer less than or equal to I.

According to the first aspect or any one of the first to fourth embodiments of the first aspect, in a fifth embodiment of the first aspect, the first time domain resource includes R sub-time domain resources, a time interval indicated by the first information is T, and R and T are positive integers. The terminal is based on the first time domain resourceDetermining, by the source and the first information, a second time domain resource, comprising: for each of the R sub-time domain resources and each of the T time intervals, if an H-th sub-time domain resource of the R sub-time domain resources is located at an mth time interval_vWithin a time domain resource unit, and the S-th time interval of the T time intervals is K_0,SThe terminal determines that the second time domain resource includes the (m) th time domain resource_v-K_0,S) A time domain resource unit. H is a positive integer less than or equal to R, S is a positive integer less than or equal to T, and v is a positive integer.

According to a fifth embodiment of the first aspect, in the sixth embodiment of the first aspect, after the terminal searches for a PDCCH monitoring opportunity on at least one downlink BWP within a time range corresponding to the second time domain resource, if the terminal is in the (m) th time domain resource in the second time domain resource_v-K_0,S) And if the PDCCH monitoring opportunity is not found on the at least one downlink BWP within the time range corresponding to the time domain resource unit, the terminal determines that the H-th sub-time domain resource in the R sub-time domain resources is not a valid PDSCH candidate position.

According to a fifth embodiment or a sixth embodiment of the first aspect, in the seventh embodiment of the first aspect, after the terminal searches for a PDCCH monitoring opportunity on at least one downlink BWP within a time range corresponding to the second time domain resource, if the terminal is in the second time domain resource (mth time domain resource)_v-K_0,S) And in a time range corresponding to the time domain resource unit, finding a PDCCH monitoring opportunity on the at least one downlink BWP, and then the terminal determines that the H-th sub-time domain resource in the R sub-time domain resources is an effective PDSCH candidate position.

In an eighth embodiment of the first aspect, according to any one of the fifth to seventh embodiments of the first aspect, the sub-time domain resources are at least two symbols consecutive in the time domain resource unit.

In a ninth embodiment of the first aspect, according to any one of the third to eighth embodiments of the first aspect, the time domain resource units are time slots.

In a second aspect, an embodiment of the present application provides a communication method, including: the network equipment determines a second time domain resource according to the first time domain resource and the first information; the first time domain resource is a time domain resource of a PDSCH candidate position, the second time domain resource is a time domain resource of a PDCCH candidate position, and the first information comprises or indicates a time interval between the PDSCH candidate position and the PDCCH candidate position; and then the network device searches the PDCCH monitoring opportunity on at least one downlink BWP within the time range corresponding to the second time domain resource.

Wherein the at least one downlink BWP comprises: all downlink BWPs configured by the network device to the terminal, or the at least one downlink BWP includes: and the network equipment configures to the terminal and activates all downlink BWPs in a time range corresponding to the second time domain resource.

In a first embodiment of the second aspect, the searching, by the network device, for a PDCCH monitoring opportunity on at least one downlink BWP within a time range corresponding to the second time domain resource includes: the network device searches for a PDCCH monitoring opportunity on each downlink BWP in the time-domain resource on each downlink BWP in the at least one downlink BWP corresponding to the second time-domain resource.

According to the second aspect or the first embodiment of the second aspect, in the second embodiment of the second aspect, the network device sends the PDSCH before determining the second time domain resource according to the first time domain resource and the first information, and then determines the first time domain resource according to the time domain resources used for transmitting the data acknowledgement information corresponding to the PDSCH and M time intervals between the PDSCH and the data acknowledgement information, where M is an integer greater than or equal to 1. Wherein the determined first time domain resource comprises: the corresponding time domain resource on the first activated downlink BWP.

According to the second embodiment of the second aspect, in the third embodiment of the second aspect, the determining, by the network device, the first time domain resource according to the time domain resource used for transmitting the data acknowledgement information corresponding to the PDSCH and the M time intervals between the PDSCH and the data acknowledgement information includes:

for each of the M time intervals, if the time domain resource for transmitting the data acknowledgement information corresponding to the PDSCH is an nth time domain resource unit, and a qth time interval of the M time intervals is K_1,QA time domain resource unit, the network device determines that the first time domain resource includes the (n-K) th time domain resource_1,Q) A time domain resource unit. The first time domain resource comprises M time domain resource units, and Q is a positive integer less than or equal to M.

According to the second aspect or any one of the first to third embodiments of the second aspect, in a fourth embodiment of the second aspect, before determining the second time domain resource according to the first time domain resource and the first information, the network device determines J valid PDSCH candidate positions from the I PDSCH candidate positions according to the I PDSCH candidate positions configured in each time domain resource unit on the first activated downlink BWP and the uplink and downlink format in each time domain resource unit, and then determines the first information according to the J valid PDSCH candidate positions. The I is an integer greater than or equal to 1, and the J is an integer less than or equal to I.

According to the second aspect or any one of the first to fourth embodiments of the second aspect, in a fifth embodiment of the second aspect, the first time domain resource includes R sub-time domain resources, the time interval indicated by the first information is T, and R and T are positive integers. The network device determines a second time domain resource according to the first time domain resource and the first information, and the determining includes: for each of the R sub-time domain resources and each of the T time intervals, if an H-th sub-time domain resource of the R sub-time domain resources is located at an mth time interval_vWithin a time domain resource unit, and the S-th time interval of the T time intervals is K_0,SThen the network device determines that the second time domain resource comprises the (m) th time domain resource_v-K_0,S) A time domain resource unit. H is a positive integer less than or equal to R, S is a positive integer less than or equal to T, and v is a positive integer.

According to a fifth embodiment of the second aspect, in a sixth embodiment of the second aspect, after the network device searches for a PDCCH monitoring opportunity on at least one downlink BWP within a time range corresponding to the second time domain resource, if the PDCCH monitoring opportunity is in the (m) th time domain resource of the second time domain resource_v-K_0,S) If the PDCCH monitoring opportunity is not found on the at least one downlink BWP within the time range corresponding to the time domain resource unit, the network device determines that the H-th sub-time domain resource of the R sub-time domain resources is not a valid PDSCH candidate location.

According to a fifth embodiment or a sixth embodiment of the second aspect, in the seventh embodiment of the second aspect, after the network device searches for a PDCCH monitoring opportunity on at least one downlink BWP within a time range corresponding to the second time domain resource, if the PDCCH monitoring opportunity is located in the second time domain resource (mth time domain resource)_v-K_0,S) And in a time range corresponding to the time domain resource unit, finding a PDCCH monitoring opportunity on the at least one downlink BWP, and then the network equipment determines that the H-th sub-time domain resource in the R sub-time domain resources is a valid PDSCH candidate position.

In an eighth embodiment of the second aspect, according to any of the fifth to seventh embodiments of the second aspect, the sub-time domain resources are at least two consecutive symbols in the time domain resource unit.

In a ninth embodiment of the second aspect, according to any one of the third to eighth embodiments of the second aspect, the time domain resource units are time slots.

In a third aspect, an embodiment of the present application provides a communication apparatus, including: the device comprises a determining module and a searching module.

The determining module is used for determining a second time domain resource according to the first time domain resource and the first information; the first time domain resource is a time domain resource of a PDSCH candidate position, the second time domain resource is a time domain resource of a PDCCH candidate position, and the first information comprises or indicates a time interval between the PDSCH candidate position and the PDCCH candidate position.

And the searching module is used for searching the PDCCH monitoring opportunity on at least one downlink BWP within the time range corresponding to the second time domain resource.

In a first embodiment of the third aspect, the search module is specifically configured to: and searching a PDCCH monitoring opportunity on each downlink BWP in the time domain resource on each downlink BWP in the at least one downlink BWP corresponding to the second time domain resource.

According to the third aspect or the first embodiment of the third aspect, in a second embodiment of the third aspect, the communication device further comprises: and a receiving module. A receiving module, configured to receive the PDSCH before the determining module determines the second time domain resource according to the first time domain resource and the first information. The determining module is further configured to determine the first time domain resource according to a time domain resource used for transmitting data acknowledgement information corresponding to the PDSCH and M time intervals between the PDSCH and the data acknowledgement information, where M is an integer greater than or equal to 1. Wherein the determined first time domain resource comprises: the corresponding time domain resource on the first activated downlink BWP.

According to the second embodiment of the third aspect, in a third embodiment of the third aspect, the determining module is specifically configured to: for each of the M time intervals, if the time domain resource for transmitting the data acknowledgement information corresponding to the PDSCH is an nth time domain resource unit, and a qth time interval of the M time intervals is K_1,QA time domain resource unit, then determining the first time domain resource includes the (n-K) th time domain resource_1,Q) A time domain resource unit. The first time domain resource comprises M time domain resource units, and Q is a positive integer less than or equal to M.

According to the third aspect or any one of the first to third embodiments of the third aspect, in a fourth embodiment of the third aspect, before determining the second time domain resource according to the first time domain resource and the first information, the determining module is further configured to determine J valid PDSCH candidate positions from the I PDSCH candidate positions according to the I PDSCH candidate positions configured in each time domain resource unit on the first activated downlink BWP and the uplink and downlink format in each time domain resource unit, where I is an integer greater than or equal to 1, and J is an integer less than or equal to I; and determining the first information according to the J effective PDSCH candidate positions.

According to the third aspect or any one of the first to fourth embodiments of the third aspect, in a fifth embodiment of the third aspect, the first time domain resource includes R sub-time domain resources, a time interval indicated by the first information is T, and R and T are positive integers. The determining module is specifically configured to: for each of the R sub-time domain resources and each of the T time intervals, if an H-th sub-time domain resource of the R sub-time domain resources is located at an mth time interval_vWithin a time domain resource unit, and the S-th time interval of the T time intervals is K_0,SThen determining that the second time domain resource comprises the (m) th time domain resource_v-K_0,S) A time domain resource unit;

h is a positive integer less than or equal to R, S is a positive integer less than or equal to T, and v is a positive integer.

According to a fifth embodiment of the third aspect, in a sixth embodiment of the third aspect, the determining module is further configured to, after the searching module searches for the PDCCH monitoring opportunity on at least one downlink BWP within a time range corresponding to the second time domain resource, determine that the PDCCH monitoring opportunity is within the (m) th time domain resource in the second time domain resource_v-K_0,S) And if the PDCCH monitoring opportunity is not found on the at least one downlink BWP within the time range corresponding to the time domain resource unit, determining that the H-th sub-time domain resource in the R sub-time domain resources is not a valid PDSCH candidate position.

According to a fifth embodiment or a sixth embodiment of the third aspect, in a seventh embodiment of the third aspect, the determining module is further configured to perform the search at the second moduleIn a time range corresponding to the time domain resource, after searching for a PDCCH monitoring opportunity on at least one downlink BWP, if the PDCCH monitoring opportunity is in the second time domain resource (mth time domain resource)_v-K_0,S) And in a time range corresponding to the time domain resource unit, finding a PDCCH monitoring opportunity on the at least one downlink BWP, and determining that the H-th sub-time domain resource in the R sub-time domain resources is an effective PDSCH candidate position.

According to any one of the fifth to seventh embodiments of the third aspect, in an eighth embodiment of the third aspect, the sub-time domain resources are at least two symbols consecutive in the time domain resource unit.

According to any one of the third to eighth embodiments of the third aspect, in a ninth embodiment of the third aspect, the time domain resource unit is a time slot.

The communication device according to the third aspect may be a terminal or a chip usable for a terminal.

In a fourth aspect, an embodiment of the present application provides a communication apparatus, including: the device comprises a determining module and a searching module.

In a first embodiment of the fourth aspect, the search module is specifically configured to: and searching a PDCCH monitoring opportunity on each downlink BWP in the time domain resource on each downlink BWP in the at least one downlink BWP corresponding to the second time domain resource.

According to the fourth aspect or the first embodiment of the fourth aspect, in a second embodiment of the fourth aspect, the communication device further comprises: and a receiving module. A receiving module, configured to receive the PDSCH before the determining module determines the second time domain resource according to the first time domain resource and the first information. The determining module is further configured to determine the first time domain resource according to a time domain resource used for transmitting data acknowledgement information corresponding to the PDSCH and M time intervals between the PDSCH and the data acknowledgement information, where M is an integer greater than or equal to 1. Wherein the determined first time domain resource comprises: the corresponding time domain resource on the first activated downlink BWP.

According to the second embodiment of the fourth aspect, in the third embodiment of the fourth aspect, the determining module is specifically configured to: for each of the M time intervals, if the time domain resource for transmitting the data acknowledgement information corresponding to the PDSCH is an nth time domain resource unit, and a qth time interval of the M time intervals is K_1,QA time domain resource unit, then determining the first time domain resource includes the (n-K) th time domain resource_1,Q) A time domain resource unit. The first time domain resource comprises M time domain resource units, and Q is a positive integer less than or equal to M.

According to the fourth aspect or any one of the first to third embodiments of the fourth aspect, in a fourth embodiment of the fourth aspect, the determining module is further configured to, before determining the second time domain resource according to the first time domain resource and the first information, determine J valid PDSCH candidate positions from the I PDSCH candidate positions according to the I PDSCH candidate positions configured in each time domain resource unit on the first activated downlink BWP and the uplink and downlink format in each time domain resource unit, where I is an integer greater than or equal to 1, and J is an integer less than or equal to I; and determining the first information according to the J effective PDSCH candidate positions.

The fourth aspect or any of the first to fourth embodiments of the fourth aspectFor example, in a fifth embodiment of the fourth aspect, the first time domain resource includes R sub-time domain resources, the time interval indicated by the first information is T, and R and T are positive integers. The determining module is specifically configured to: for each of the R sub-time domain resources and each of the T time intervals, if an H-th sub-time domain resource of the R sub-time domain resources is located at an mth time interval_vWithin a time domain resource unit, and the S-th time interval of the T time intervals is K_0,SThen determining that the second time domain resource comprises the (m) th time domain resource_v-K_0,S) A time domain resource unit;

According to a fifth embodiment of the fourth aspect, in a sixth embodiment of the fourth aspect, the determining module is further configured to find the PDCCH monitoring opportunity on at least one downlink BWP in a time range corresponding to the second time domain resource by the finding module, and if the PDCCH monitoring opportunity is in the (m) th time domain resource in the second time domain resource_v-K_0,S) And if the PDCCH monitoring opportunity is not found on the at least one downlink BWP within the time range corresponding to the time domain resource unit, determining that the H-th sub-time domain resource in the R sub-time domain resources is not a valid PDSCH candidate position.

According to a fifth embodiment or a sixth embodiment of the fourth aspect, in the seventh embodiment of the fourth aspect, the determining module is further configured to find the PDCCH monitoring opportunity on at least one downlink BWP in a time range corresponding to the second time domain resource, and if the PDCCH monitoring opportunity is in the second time domain resource (mth time domain resource)_v-K_0,S) And in a time range corresponding to the time domain resource unit, finding a PDCCH monitoring opportunity on the at least one downlink BWP, and determining that the H-th sub-time domain resource in the R sub-time domain resources is an effective PDSCH candidate position.

In an eighth embodiment of the fourth aspect, according to any one of the fifth to seventh embodiments of the fourth aspect, the sub-time domain resources are at least two consecutive symbols in the time domain resource unit.

In a ninth embodiment of the fourth aspect, the time domain resource units are time slots, according to any of the third to eighth embodiments of the fourth aspect.

The communication apparatus according to the fourth aspect may be a network device, or may be a chip usable for a network device.

In a fifth aspect, an embodiment of the present application provides a communication apparatus, including: a memory and a processor. The memory is used for storing program codes. The processor calls the program code, and when the program code is executed, is configured to perform the communication method according to any embodiment of the first aspect or any embodiment of the second aspect.

In a sixth aspect, an embodiment of the present application provides a readable storage medium, on which a computer program is stored; the computer program, when executed, implements the communication method of any embodiment of the present application of the first aspect or any embodiment of the present application of the second aspect.

In a seventh aspect, this application embodiment provides a program product, where the program product includes a computer program, where the computer program is stored in a readable storage medium, and the computer program can be read by at least one processor of a communication apparatus from the readable storage medium, and the computer program is executed by the at least one processor to enable the communication apparatus to implement the communication method according to any embodiment of the first aspect or any embodiment of the second aspect.

In summary, the communication method and apparatus determine the second time domain resource according to the first time domain resource and the first information; the first time domain resource is a time domain resource of a PDSCH candidate position, the second time domain resource is a time domain resource of a PDCCH candidate position, and the first information comprises or indicates a time interval between the PDSCH candidate position and the PDCCH candidate position; and then, in the time range corresponding to the second time domain resource, the network device searches for PDCCH monitoring opportunities on all downlink BWPs configured to the terminal, or searches for PDCCH monitoring opportunities on all downlink BWPs configured to the terminal by the network device and activated in the time range corresponding to the second time domain resource, so that all PDCCH monitoring opportunities corresponding to the PDSCH can be found, the phenomenon of missing PDCCH monitoring opportunities is avoided, the condition of missing data confirmation information of downlink data is avoided, and the communication quality is improved.

Drawings

Fig. 1 is a schematic diagram of a communication system according to an embodiment of the present application;

fig. 2 is a schematic diagram of a downlink data transmission process between a network device and a terminal according to an embodiment of the present application;

fig. 3 is a schematic diagram illustrating that a terminal feeds back data acknowledgement information corresponding to multiple PDSCHs to a network device according to an embodiment of the present application;

fig. 4 is a schematic diagram illustrating a relationship between time domain resources of a PDCCH and a PDSCH in downlink BWP hopping according to an embodiment of the present application;

fig. 5 is a flowchart of a communication method according to an embodiment of the present application;

fig. 6 is a schematic diagram of time slots corresponding to different time domain resource units according to an embodiment of the present application;

fig. 7 is a schematic diagram of determining first time domain resources according to an embodiment of the present application;

fig. 8 is a schematic diagram illustrating a comparison between time domain resources of PDSCH candidate locations and uplink and downlink formats according to an embodiment of the present application;

fig. 9 is a schematic diagram illustrating a relationship between time domain resources between a PDCCH and a PDSCH in a downlink BWP hop according to an embodiment of the present application;

fig. 10 is a schematic diagram illustrating a relationship between time domain resources of a PDCCH and a PDSCH in a downlink BWP hop according to an embodiment of the present application;

fig. 11 is a schematic diagram illustrating a relationship between time domain resources of a PDCCH and a PDSCH in downlink BWP hopping according to an embodiment of the present application;

fig. 12 is a schematic diagram illustrating a relationship between time domain resources of a PDCCH and a PDSCH in a downlink BWP hop according to an embodiment of the present application;

fig. 13 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 14 is a schematic structural diagram of a communication device according to another embodiment of the present application;

fig. 15 is a schematic structural diagram of a communication device according to another embodiment of the present application.

Detailed Description

Fig. 1 is a schematic diagram of a communication system according to an embodiment of the present application, and as shown in fig. 1, the communication system includes a network device and a terminal.

In the following, some terms in the present application are explained to facilitate understanding by those skilled in the art:

a network device: also called Radio Access Network (RAN) device, which is a device for accessing a terminal to a wireless Network, may be an evolved Node B (eNB or eNodeB) in Long Term Evolution (LTE), or a relay station or an Access Point, or a base station in a 5G Network, such as a Transmission and Reception Point (TRP) and a controller, but is not limited herein. In one possible approach, the radio access network device may be a base station (e.g., a gNB) of a CU and DU separation architecture.

A terminal: the wireless terminal can be a wireless terminal or a wired terminal, and the wireless terminal can be a device with a wireless transceiving function, can be deployed on land, and comprises indoor or outdoor, handheld or vehicle-mounted; can also be deployed on the water surface (such as a ship and the like); and may also be deployed in the air (e.g., airplanes, balloons, satellites, etc.). The terminal may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal, an Augmented Reality (AR) terminal, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in remote medical (remote medical), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), and the like, which are not limited herein. It can be understood that, in the embodiment of the present application, a terminal may also be referred to as a User Equipment (UE).

The process of sending downlink data to the terminal by the network device may be, for example:

1. the network device sends Downlink Control Information (DCI) to the terminal, where the DCI includes Downlink data scheduling Information for notifying the terminal of which time-frequency resource position to receive and demodulate data according to what configuration parameters (such as Modulation and Coding Scheme (MCS), Redundancy Version (RV), and the like).

2. The network equipment sends corresponding data to the terminal according to the configuration parameters indicated in the DCI at the time-frequency resource position indicated in the DCI; and the terminal receives the data sent by the network equipment at the corresponding position according to the corresponding parameters.

3. After receiving the data, the terminal also needs to feed back Hybrid Automatic Repeat reQuest (HARQ) -data acknowledgement information, which may also be referred to as HARQ-ACK information, to the network device. The HARQ is a technology formed by combining a Forward Error Correction (FEC) and an Automatic Repeat reQuest (ARQ). FEC enables a terminal to correct a part of errors by adding redundant information, thereby reducing the number of retransmissions. For the error that the FEC cannot correct, the terminal requests the network device to retransmit the data through the ARQ mechanism. The terminal uses an error detection code, typically a Cyclic Redundancy Check (CRC) Check, to detect whether a received data packet is erroneous. If there is no error, the terminal will send a positive data Acknowledgement (ACK) to the sending end, and after receiving the ACK, the network device will send the next data packet. If there is an error, the terminal discards the packet and sends a negative data acknowledgement (NACK) to the network device, and the network device retransmits the same data after receiving the NACK.

Fig. 2 is a schematic view of a downlink data transmission process between a network device and a terminal according to an embodiment of the present application, where a PDCCH carries DCI, and a PDSCH carries downlink data. In some embodiments, when feeding back the data acknowledgement information to the network device, the terminal may feed back the data acknowledgement information corresponding to multiple PDSCHs on the same time domain resource. As shown in fig. 3, fig. 3 is a schematic diagram illustrating that a terminal feeds back data acknowledgement information corresponding to multiple PDSCHs to a network device according to an embodiment of the present invention, where fig. 3 illustrates 3 PDSCHs, and 3 PDSCHs need to feed back data acknowledgement information in the same time domain resource, and when the techniques such as space division multiplexing and Code Block Group (CBG) based transmission are not adopted, the size of a codebook of corresponding data acknowledgement information is 3 bits, and the order of the 3 bits may be determined according to the order of receiving the PDSCHs. The specific process of determining which data confirmation information corresponding to the PDSCH is fed back to the network device in the same time domain resource is as follows: according to the time interval between the PDSCH and the corresponding data confirmation information, the time interval between the PDSCH and the PDCCH and the symbols occupied by the PDSCH candidate positions in each time slot, the time slots of the PDCCH candidate positions are determined, whether PDCCH monitoring opportunities exist in the time slots of the PDCCH candidate positions is searched, and then the data confirmation information of the PDSCH corresponding to the searched PDCCH monitoring opportunities is determined to be fed back to the network equipment at the same time.

In the 5G system, the network device and the terminal communicate using BWP, and as shown in fig. 4, fig. 4 illustrates an example where the time interval between the PDSCH and the PDCCH is 0 slot, and the activated downlink BWP jumps from downlink BWP0 to downlink BWP1 in slot 1, where the network device transmits the PDCCH to the terminal on downlink BWP0 in slot 1 and the PDCCH schedules the PDSCH of the same slot, so the network device transmits the PDSCH to the terminal on downlink BWP1 in slot 1. However, in the prior art, when data acknowledgement information is transmitted, a PDCCH monitoring opportunity is searched in a time slot (e.g., time slots 0, 1, and 2) of a PDCCH candidate position on an active downlink BWP (i.e., downlink BWP 1). If there is no PDCCH monitoring opportunity on downlink BWP1 in time slot 1, and therefore it is considered that there is no valid PDSCH transmission in time slot 1, the data acknowledgement information corresponding to the PDSCH in time slot 1 is not fed back to the network device. It can be seen that there is a PDCCH listening opportunity in slot 1 on downlink BWP0 (the PDSCH in slot 1 is scheduled by the PDCCH in slot 1 on BWP 0). Therefore, in the prior art, searching for a PDCCH monitoring opportunity on a downlink BWP (only one downlink BWP) that is activated only when data acknowledgement information is transmitted causes a problem of missing a PDCCH monitoring opportunity, and thus causes a problem that some data acknowledgement information of downlink data is not fed back to a network device. The following embodiments of the present application can solve this technical problem.

Fig. 5 is a flowchart of a communication method according to an embodiment of the present application, and as shown in fig. 5, the method according to the embodiment may be applied to a terminal, and may also be applied to a network device, and the method according to the embodiment may include:

s501, determining a second time domain resource according to the first time domain resource and the first information.

The first time domain resource is a time domain resource of a PDSCH candidate location (PDSCH candidate), and the second time domain resource is a time domain resource of a PDCCH candidate location (PDCCH candidate). And the first information includes: the time interval between the candidate position of the PDSCH and the candidate position of the PDCCH, or the first information indicates the time interval between the candidate position of the PDSCH and the candidate position of the PDCCH.

In this embodiment, the terminal and/or the network device determines the second time domain resource according to the first time domain resource and the first information. For example: and if the time domain resource of the PDSCH candidate position is a time slot 2 and the time interval between the PDSCH candidate position and the PDCCH candidate position is 1 time slot, determining the time domain resource of the PDCCH candidate position to be a time slot (2-1), namely a time slot 1.

S502, in the time range corresponding to the second time domain resource, a PDCCH monitoring opportunity is searched on at least one downlink BWP.

In this embodiment, after determining the second time domain resource, the terminal and/or the network device searches for a PDCCH monitoring opportunity on at least one downlink BWP within a time range corresponding to the second time domain resource. Since the embodiment searches for the PDCCH monitoring opportunity not only on the downlink BWPs activated when transmitting the data acknowledgement information (i.e. only one downlink BWP), but also on at least one downlink BWP, the phenomenon of missing PDCCH monitoring opportunities is reduced.

In some embodiments, the at least one downlink BWP comprises: and the network equipment configures all downlink BWPs to the terminal. That is, after determining the second time domain resource, the terminal and/or the network device searches for the PDCCH monitoring opportunities on all downlink BWPs configured by the network device to the terminal in the time range corresponding to the second time domain resource. If all the lower BWPs configured by the network device to the terminal include: for the situation shown in fig. 4, the terminal and/or the network device of this embodiment may search PDCCH monitoring opportunities on downlink BWP0, downlink BWP1, and downlink BWP2, so that PDCCH monitoring opportunities missed in the prior art on downlink BWP1 may be found. Therefore, the present embodiment can avoid the situation of missing PDCCH monitoring opportunities.

In some embodiments, the at least one downlink BWP is: and the network equipment configures all the downlink BWPs to the terminal and activates the downlink BWPs in the time range corresponding to the second time domain resource. That is, after determining the second time domain resource, the terminal and/or the network device configures to the terminal in a time range corresponding to the second time domain resource, and searches for a PDCCH monitoring opportunity in the downlink BWP activated in the time range corresponding to the second time domain resource. If all the lower BWPs configured by the network device to the terminal include: for the case shown in fig. 4, if the second time-domain resource is timeslot 1 shown in fig. 4, because the activated downlink BWP is skipped from downlink BWP0 to downlink BWP1 in timeslot 1 and the activated downlink BWP is downlink BWP0 and downlink BWP1 in the time range corresponding to timeslot 1, the terminal and/or the network device of this embodiment may search for PDCCH monitoring opportunities on both downlink BWP0 and downlink BWP1, so that PDCCH monitoring opportunities missed in the prior art on downlink BWP1 may be found. Therefore, the present embodiment can avoid the situation of missing PDCCH monitoring opportunities.

Therefore, the embodiment determines the second time domain resource according to the first time domain resource and the first information; the first time domain resource is a time domain resource of a PDSCH candidate position, the second time domain resource is a time domain resource of a PDCCH candidate position, and the first information comprises or indicates a time interval between the PDSCH candidate position and the PDCCH candidate position; and then, in the time range corresponding to the second time domain resource, the network device searches for PDCCH monitoring opportunities on all downlink BWPs configured to the terminal, or searches for PDCCH monitoring opportunities on all downlink BWPs configured to the terminal by the network device and activated in the time range corresponding to the second time domain resource, so that all PDCCH monitoring opportunities corresponding to the PDSCH can be found, the phenomenon of missing PDCCH monitoring opportunities is avoided, the condition of missing data confirmation information of downlink data is avoided, and the communication quality is improved.

In some embodiments, one possible implementation manner of S502 may include: and searching a PDCCH monitoring opportunity on each downlink BWP in the time domain resource on each downlink BWP in the at least one downlink BWP corresponding to the second time domain resource.

The subcarrier intervals are different, and accordingly, the time lengths of the time domain resource units are also different. Therefore, the subcarrier intervals of the at least one downlink BWP may not be exactly the same, which causes the time-domain resource units corresponding to the at least one downlink BWP to have different time lengths. For example: if the subcarrier interval of the downlink BWP0 is 15KHz and the subcarrier interval of the downlink BWP1 is 30KHz, the time length of the time-domain resource unit corresponding to the downlink BWP0 is 2 times the time length of the time-domain resource unit of the downlink BWP 1. If the subcarrier interval of the downlink BWP0 is 30KHz and the subcarrier interval of the downlink BWP1 is 15KHz, the time length of the time-domain resource unit corresponding to the downlink BWP0 is 0.5 times the time length of the time-domain resource unit of the downlink BWP 1. Thus, at the same time, the time-domain resources on downlink BWP0 are not the same as the time-domain resources on downlink BWP 1.

Therefore, when the terminal and/or the network device searches for the PDCCH monitoring opportunity on the at least one downlink BWP, the second time domain resource needs to be converted into the time domain resource on each downlink BWP in the at least one downlink BWP, and then the PDCCH monitoring opportunity is searched on each downlink BWP in the time domain resource on each downlink BWP. The determining, by the terminal and/or the network device, the time-domain resource on each downlink BWP in the at least one downlink BWP may include, for example: the terminal and/or the network device determines the length of the time domain resource unit of each downlink BWP in the at least one downlink BWP, and then determines the time domain resource on each downlink BWP corresponding to the second time domain resource according to the length of the time domain resource unit corresponding to the second time domain resource and the length of the time domain resource unit of each downlink BWP. The time domain resource unit in this embodiment may be a time slot, but the embodiment is not limited thereto, and the time domain resource may also be divided in other manners. Taking the time domain resource unit as the time slot as an example, if the length of the time domain resource unit corresponding to the second time domain resource is 2 times of the length of the time domain resource unit on one downlink BWP, if the second time domain resource is the time slot 1, the time domain resources on the downlink BWP corresponding to the second time domain resource are the time slot 2 and the time slot 3, for example, as shown in fig. 6.

Optionally, the terminal and/or the network device may determine the length of the time-domain resource unit of each downlink BWP according to the subcarrier interval of each downlink BWP.

The second time domain resource includes a time domain resource corresponding to the first activated downlink BWP, where the first activated downlink BWP may be a downlink BWP in an activated state when the terminal feeds back the data acknowledgement information.

In some embodiments, if the foregoing embodiments are performed by a terminal, before the terminal performs the foregoing S501, the terminal further receives a PDSCH, for example, receives a PDSCH sent by a network device, and then determines the first time domain resource according to time domain resources used for transmitting data acknowledgement information corresponding to the PDSCH and M time intervals between the PDSCH and the data acknowledgement information.

In some embodiments, if the foregoing embodiments are performed by a network device, before the network device performs the foregoing S501, the PDSCH is further transmitted, for example, the PDSCH is transmitted to a terminal, and then the first time domain resource is determined according to time domain resources used for transmitting data acknowledgement information corresponding to the PDSCH and M time intervals between the PDSCH and the data acknowledgement information.

Wherein M is an integer of 1 or more; wherein the determined first time domain resource comprises: the corresponding time domain resource on the first activated downlink BWP. The first activated downlink BWP may refer to a downlink BWP that is in an activated state when the terminal feeds back the data acknowledgement information. The data acknowledgment information corresponding to the PDSCH is transmitted through the uplink BWP in the active state, and the time domain resource used for transmitting the data acknowledgment information corresponding to the PDSCH may be considered to include the time domain resource corresponding to the first active uplink BWP, where the first active uplink BWP may refer to the uplink BWP in the active state when the terminal feeds back the data acknowledgment information. And according to the time domain resources used for transmitting the data acknowledgement information corresponding to the PDSCH and the M time intervals, obtaining first time domain resources including: the corresponding time domain resource on the first activated downlink BWP.

In some embodiments, a terminal and/or a network device determines the first time domain resource according to a time domain resource used for transmitting data acknowledgement information corresponding to the PDSCH and M time intervals between the PDSCH and the data acknowledgement information, where one implementation manner of the terminal and/or the network device is as follows:

for each of the M time intervals, if the time domain resource for transmitting the data acknowledgement information corresponding to the PDSCH is an nth time domain resource unit, and the qth time interval of the M time intervals is K_1,QA time domain resource unit, then determining the first time domain resource includes the (n-K) th time domain resource_1,Q) A time domain resource unit.

The first time domain resource comprises M time domain resource units, and Q is a positive integer less than or equal to M.

Since there are M time intervals, the n time domain resource unit is subtracted from the M time intervals to obtain M different time domain resource units. If n is equal to 3 and M is equal to 3, i.e. the nth time domain resource unit is the 3 rd time slot, i.e. time slot 3, the M time intervals may include: 1 timeslot, 2 timeslots, and 3 timeslots, the obtained first time domain resources are timeslot 0, timeslot 1, and timeslot 2, as shown in fig. 7.

Optionally, the M time intervals may be predefined, or may be configured to the terminal by the network device.

In some embodiments, before performing S501, the terminal and/or the network device further performs the following:

the terminal and/or the network device determines J effective PDSCH candidate positions from the I PDSCH candidate positions according to the I PDSCH candidate positions configured in each time domain resource unit on the first activated downlink BWP and the uplink and downlink formats in each time domain resource unit, wherein I is an integer greater than or equal to 1, and J is an integer less than or equal to I. The first activated downlink BWP may refer to a downlink BWP that is in an activated state when the terminal feeds back the data acknowledgement information. That is, the terminal and/or the network device of this embodiment determines PDSCH candidate positions that do not conflict with the uplink and downlink formats in each time domain resource unit from the I PDSCH candidate positions, and these determined PDSCH candidate positions are referred to as valid PDSCH candidate positions. The uplink and downlink format in each time domain resource unit indicates the time domain resource used for uplink transmission and the time domain resource used for downlink transmission in each time domain resource unit, and if the PDSCH candidate position is overlapped with the time domain resource used for uplink transmission, the PDSCH candidate position is not a valid PDSCH candidate position; otherwise, the PDSCH candidate location is a valid PDSCH candidate location.

And then the terminal and/or the network equipment determines the first information according to the J effective PDSCH candidate positions. In this embodiment, each PDSCH candidate position corresponds to a time interval, so that after determining J effective PDSCH candidate positions, the terminal and/or the network device determines time intervals corresponding to the J effective PDSCH candidate positions, and then determines the time intervals corresponding to the J effective PDSCH candidate positions as the time intervals between the PDSCH candidate positions and the PDCCH candidate positions.

Wherein, the candidate positions of I-type PDSCH configured in each time domain resource unit on the first activated downlink BWP and the corresponding time interval K₀As shown in table one. In the first table, the time domain resource unit is taken as an example of a time slot, and the PDSCH candidate position is represented by a start symbol and a symbol length. For example, the table has 4 columns × I rows. Wherein the contents of each column are respectively a serial number and a time interval K₀Value, starting symbol and symbol length within each slot, mapping type. The table one may be predefined, or may be configured to the terminal by the network device.

Watch 1

Where, Table one takes I equal to 4 as an example, where K for each row₀The values, starting symbols and symbol lengths, and mapping types are examples, and the embodiment is not limited thereto. K of each row₀Are all 0 (i.e. the time interval is 0 slots), and the mapping type can refer to the description in the prior art. The candidate positions of the PDSCH in each time slot (i.e., the starting symbols and the symbol lengths) corresponding to the sequence numbers in table i and the uplink and downlink formats in each time slot are shown in fig. 8, where the uplink and downlink formats indicate that the first 10 symbols (symbols 0 to 9) in each time slot are used for downlink transmission and the last 4 symbols (symbols 10 to 13) are used for uplink transmission. It can be known that the PDSCH candidate positions corresponding to sequence number 0 and sequence number 1 conform to the uplink and downlink format, and the PDSCH candidate positions corresponding to sequence number 2 and sequence number 3 do not conform to the uplink and downlink format. Then K in serial number 0 and serial number 1₀The values are all determined as the time intervals of the time domain resources of the PDSCH candidate locations and the time domain resources of the PDCCH candidate locations.

In some embodiments, the first time domain resource includes R sub-time domain resources, and the time interval indicated by the first information is T, and an implementation manner of S501 above may include:

for each of the R sub-time domain resources and each of the T time intervals, if an H-th sub-time domain resource of the R sub-time domain resources is located at an mth time interval_vWithin a time domain resource unit, and the S-th time interval of the T time intervals is K_0,SThe terminal determines that the second time domain resource includes the (m) th time domain resource_v-K_0,S) A time domain resource unit; h is a positive integer less than or equal to R, S is a positive integer less than or equal to T, and v is a positive integer.

Optionally, the sub-time domain resource is at least two consecutive symbols in the time domain resource unit.

Taking a time domain resource unit as a time slot as an example, the first time domain resource includes a time slot 0, a time slot 1, and a time slot 2, and according to an effective PDSCH candidate position in each time slot, for example, as shown in table one and fig. 8, it is known that symbols 3 to 7 in the time slot 0 are sub-time domain resources, symbols 5 to 9 in the time slot 0 are sub-time domain resources, symbols 3 to 7 in the time slot 1 are sub-time domain resources, symbols 5 to 9 in the time slot 1 are sub-time domain resources, symbols 3 to 7 in the time slot 2 are sub-time domain resources, and symbols 5 to 9 in the time slot 2 are sub-time domain resources, so that the first time domain resource includes 6 sub-time domain resources. Wherein, the 1 st sub-time domain resource is that the symbol 3-symbol 7 in the time slot 0 are located in the time slot 0, and the time slots (0-0), namely the time slot 0, can be determined because the time intervals are all 0 time slots; the 2 nd sub-time domain resource is that the symbol 5-symbol 9 in the time slot 0 are located in the time slot 0, and the time slots (0-0), namely the time slot 0, can be determined because the time intervals are all 0 time slots; the 3 rd sub-time domain resource is that the symbol 3-the symbol 7 in the time slot 1 are located in the time slot 1, and the time slots (1-0), namely the time slot 1, can be determined because the time intervals are all 0 time slots; the 4 th sub-time domain resource is that the symbol 5-symbol 9 in the time slot 1 are located in the time slot 1, and the time interval is 0 time slots, so that the time slot (1-0), namely the time slot 1, can be determined; the 5 th sub-time domain resource is that a symbol 3-a symbol 7 in a time slot 2 are positioned in the time slot 2, and the time slots (2-0), namely the time slot 2, can be determined because the time intervals are all 0 time slots; the 6 th sub-time domain resource is that symbols 5-9 in slot 2 are located in slot 2, and since the time intervals are all 0 slots, slot (2-0), namely slot 2, can be determined. Thus, a second time domain resource comprising slot 0-slot 2 may be obtained. After the second time domain resource is determined, the terminal and/or the network device searches for a PDCCH monitoring opportunity on the at least one downlink BWP within a time range corresponding to the time slot 0-time slot 2.

Optionally, after the terminal and/or the network device performs the above S502, if the terminal and/or the network device is in the (m) th time domain resource in the second time domain resource_v-K_0,S) Within the time range corresponding to the time domain resource unit, in the at least oneIf a PDCCH monitoring opportunity is found on the downlink BWP, the terminal and/or the network device determines that the H-th sub-time domain resource of the R sub-time domain resources is a valid PDSCH candidate location. If the PDCCH monitoring opportunity is found on the at least one downlink BWP within the time range of the time slot 0 and the time slot 2 in the second time domain resource, the 1 st sub-time domain resource and the 2 nd sub-time domain resource corresponding to the time slot 0 in the second time domain resource are valid PDSCH candidate locations, and the 5 th sub-time domain resource and the 6 th sub-time domain resource corresponding to the time slot 2 in the second time domain resource are valid PDSCH candidate locations.

Optionally, after the terminal and/or the network device performs the above S502, if the terminal and/or the network device is in the (m) th time domain resource in the second time domain resource_v-K_0,S) And if the PDCCH monitoring opportunity is not found on the at least one downlink BWP within the time range corresponding to the time domain resource unit, the terminal and/or the network device determines that the H-th sub-time domain resource of the R sub-time domain resources is not a valid PDSCH candidate location. If the PDCCH monitoring opportunity is not found on the at least one downlink BWP within the time range of the time slot 1 in the second time domain resource, the 3 rd sub-time domain resource and the 4 th sub-time domain resource corresponding to the time slot 1 in the second time domain resource are not valid PDSCH candidate positions.

The valid PDSCH candidate position is determined by considering the PDSCH candidate position in the subsequent possible procedure when determining the semi-static data acknowledgement information (HARQ-ACK) codebook. For example, through the embodiments described in the present application, it is finally determined that there are a valid PDSCH candidate positions, the terminal needs to feed back data acknowledgement information corresponding to a PDSCHs to the network device at most, and the network device needs to receive data acknowledgement information corresponding to a PDSCHs from the terminal. When determining the semi-static HARQ-ACK codebook, after using the embodiments described in the present application, there may be other methods, which may further screen B (B is less than or equal to a) PDSCH candidate positions from the a valid PDSCH candidate positions, and finally the terminal needs to feed back data acknowledgement information corresponding to the B PDSCHs to the network device, and the network device needs to receive the data acknowledgement information corresponding to the B PDSCHs from the terminal.

The embodiments of the present invention will be described below in terms of several specific embodiments. The following description will be made with the terminal as UE, the time-frequency resource unit as time slot, the time interval between the PDSCH candidate location and the PDCCH candidate location being K0, the time interval between the time-domain resource for transmitting the data acknowledgement information corresponding to the PDSCH and the PDSCH being K1, and the data acknowledgement information being HARQ-ACK information. Valid PDSCH candidate locations may be referred to as valid PDSCH transmission locations.

In the first embodiment, the UE switches from BWP2 to BWP2 for slot 1, as shown in fig. 9. The UE is configured with a value set of K1 of {1,2,3 }. HARQ-ACK information is fed back on slot 3. Table of time domain resource allocation configured by UE on BWP2 as shown in table one above, it can be seen that 4 PDSCH candidate positions are configured in each slot. K0 value corresponding to each PDSCH candidate location (i.e., K in table one)₀) Are all 0. The slot structure within each slot is shown in fig. 8.

In any one of the time slots 0, 1 and 2, the UE obtains an effective PDSCH transmission position, i.e., a position corresponding to sequence number 0 and sequence number 1, according to the prior art. And then, in any one of the time slot 0, the time slot 1 and the time slot 2, whether a PDCCH monitoring opportunity exists is checked according to K0 values corresponding to the sequence number 0 and the sequence number 1.

In this embodiment, the UE checks whether there is a PDCCH monitoring opportunity on all configured downlink BWPs/any configured downlink BWPs, and in slot 0 and slot 2, there is a PDCCH monitoring opportunity on BWP2, and in slot 1, there is a PDCCH monitoring opportunity on BWP 1. Therefore, after screening, the effective positions of 6 PDSCHs are shared in three time slots from time slot 0 to time slot 2. These positions need to be taken into account in the subsequent determination of the semi-static codebook.

Therefore, the present embodiment can solve the problem that the semi-static codebook may be in error when BWP switching.

In the second embodiment, the scenario of the present embodiment is completely the same as that of the first embodiment, except that in the present embodiment, the UE checks whether there is a PDCCH monitoring opportunity on all active downlink BWPs/any active downlink BWP, and in slot 0 and slot 2, there is a PDCCH monitoring opportunity when BWP2 is in the active state; in slot 1, BWP1 and BWP2 are both active for a while, respectively, and there is a PDCCH listening opportunity on BWP 1. Therefore, through screening, the effective positions of 6 PDSCHs are in total in three time slots of the time slots 0-2. These positions need to be taken into account in the subsequent determination of the semi-static codebook.

In the third embodiment, the difference between the present embodiment and the first embodiment is that, during BWP handover, the PDCCH and the PDSCH are not in the same slot, the table of time domain resource allocation is shown in table two, where the value of K0 is different from that in table one, and the rest of the configurations (e.g., the start position and length of the symbol, the actual slot structure, etc.) are the same as those in table one. Among them, K0 and SLIV in table 2 are only examples and are not limited thereto.

Watch two

As in the first embodiment, in time slots 1 to 3, the UE excludes the PDSCH candidate positions corresponding to sequence numbers 2 and 3 (due to uplink and downlink collisions with the actual time slot structure (i.e., the uplink and downlink format) according to the conventional method. And then, in any one of the time slots 1,2 and 3, according to the K0 values corresponding to the sequence number 0 and the sequence number 1, checking whether there is a PDCCH monitoring opportunity.

In this embodiment, the UE checks whether there is a PDCCH monitoring opportunity on all configured downlink BWPs/any configured downlink BWPs, and there is a PDCCH monitoring opportunity on BWP2 when K0 is 0 in slot 1 and slot 3. In slot 2, when K0 is 2, there is a PDCCH monitoring opportunity on BWP1, as shown in fig. 10. Therefore, after screening, the effective positions of 6 PDSCHs are shared in three time slots, namely time slot 1 to time slot 3. These positions need to be taken into account in the subsequent determination of the semi-static codebook.

In the fourth embodiment, the scenario is completely the same as that of the third embodiment, except that in this embodiment, the UE checks whether there is a PDCCH monitoring opportunity on all downlink BWPs in the active state/on any downlink BWP in the active state, and in slot 3, there is a PDCCH monitoring opportunity when BWP2 is in the active state; in time slots 0-2, BWP1 and BWP2 are both active for a period of time, and there is a corresponding PDCCH monitoring opportunity on either BWP1 or BWP 2. Therefore, through screening, the effective positions of 6 PDSCHs are in total in three time slots of the time slots 1-3. These positions need to be taken into account in the subsequent determination of the semi-static codebook.

In the fifth embodiment, the difference between the first embodiment and the fifth embodiment is that BWP1 and BWP2 have different subcarrier spacing, in this example, BWP1 has a subcarrier spacing of 30kHz and BWP2 has a subcarrier spacing of 15 kHz.

In this embodiment, the UE may search whether there is a PDCCH monitoring opportunity on all configured downlink BWPs/any configured downlink BWPs, or on all activated downlink BWPs/any activated downlink BWPs. In slot 1, when calculating the position where K0 is 0, slot 1 on BWP2 and the two slots (slot c and slot d) on BWP1 corresponding to this slot should be considered. I.e. it needs to look up whether there is a PDCCH listening opportunity on a total of 3 slot-BWP pairs (slot-BWP-pair). As shown in fig. 11, there is a PDCCH monitoring opportunity in time slot c of BWP1, so there is a valid location of PDSCH in time slot 1, which needs to be taken into account in the subsequent process of determining the semi-static codebook.

In the sixth embodiment, the difference between the sixth embodiment and the fifth embodiment is that the subcarrier spacing of BWP1 is 15kHz and the subcarrier spacing of BWP2 is 30kHz in the present embodiment. The rest of the configuration is the same.

In this embodiment, the UE may search whether there is a PDCCH monitoring opportunity on all configured downlink BWPs/any configured downlink BWPs, or on all activated downlink BWPs/any activated downlink BWPs. In slot 2, when calculating the position where K0 is 0, slot 1 on BWP2 and slot b on BWP1 corresponding to the slot should be considered. I.e. it needs to look up whether there is a PDCCH listening opportunity on a total of 2 slot-BWP pairs (slot-BWP-pair). As shown in fig. 12, there is a PDCCH monitoring opportunity in slot b of BWP1, so there is a valid location of PDSCH in slot 1, which needs to be taken into account in the subsequent process of determining the semi-static codebook.

It should be noted that the first to sixth embodiment modes described above may also be executed by a network device.

It is to be understood that, in the above embodiments, the method or step implemented by the terminal may also be implemented by a component (e.g., a chip or a circuit, etc.) available for the terminal, and the method or step implemented by the network device may also be implemented by a component (e.g., a chip or a circuit, etc.) available for the network device.

Fig. 13 is a schematic structural diagram of a communication device according to an embodiment of the present application, where the communication device may be a terminal or a chip that can be used for the terminal, as shown in fig. 13, the communication device according to the embodiment may include: a determination module 1301 and a lookup module 1302. Optionally, the communication device of this embodiment may further include a receiving module 1303.

A determining module 1301, configured to determine a second time domain resource according to the first time domain resource and the first information; the first time domain resource is a time domain resource of a PDSCH candidate position, the second time domain resource is a time domain resource of a PDCCH candidate position, and the first information comprises or indicates a time interval between the PDSCH candidate position and the PDCCH candidate position.

A searching module 1302, configured to search for a PDCCH monitoring opportunity on at least one downlink BWP within a time range corresponding to the second time domain resource.

In some embodiments, the search module 1302 is specifically configured to: and searching a PDCCH monitoring opportunity on each downlink BWP in the time domain resource on each downlink BWP in the at least one downlink BWP corresponding to the second time domain resource.

In some embodiments, the receiving module 1303 is configured to receive the PDSCH before the determining module 1301 determines the second time domain resource according to the first time domain resource and the first information.

The determining module 1301 is further configured to determine the first time domain resource according to a time domain resource used for transmitting data acknowledgement information corresponding to the PDSCH and M time intervals between the PDSCH and the data acknowledgement information, where M is an integer greater than or equal to 1;

In some embodiments, the determining module 1301 is specifically configured to: for each of the M time intervals, if the time domain resource for transmitting the data acknowledgement information corresponding to the PDSCH is an nth time domain resource unit, and a qth time interval of the M time intervals is K_1,QA time domain resource unit, then determining the first time domain resource includes the (n-K) th time domain resource_1,Q) A time domain resource unit. The first time domain resource comprises M time domain resource units, and Q is a positive integer less than or equal to M.

In some embodiments, the determining module 1301 is further configured to determine J valid PDSCH candidate positions from the I PDSCH candidate positions according to the configured I PDSCH candidate positions in each time domain resource unit on the first activated downlink BWP and the uplink and downlink format in each time domain resource unit before determining the second time domain resource according to the first time domain resource and the first information, where I is an integer greater than or equal to 1, and J is an integer less than or equal to I; and determining the first information according to the J effective PDSCH candidate positions.

In some embodiments, the first time domain resource includes R sub-time domain resources, the time interval indicated by the first information is T, and R and T are positive integers. The determining module 1301 is specifically configured to: for each of the R sub-time domain resources and each of the T time intervals, if an H-th sub-time domain resource of the R sub-time domain resources is located at an mth time interval_vWithin a time domain resource unit, and the S-th time interval of the T time intervals is K_0,SThen determining that the second time domain resource comprises the (m) th time domain resource_v-K_0,S) A time domain resource unit. H is a positive integer less than or equal to R, S is a positive integer less than or equal to T, and v is a positive integer.

In some embodiments, the determining module 1301 is further configured to, after the searching module 1302 searches for a PDCCH monitoring opportunity on at least one downlink BWP within a time range corresponding to the second time domain resource, determine that the PDCCH monitoring opportunity is in the (m) th time domain resource in the second time domain resource_v-K_0,S) And if the PDCCH monitoring opportunity is not found on the at least one downlink BWP within the time range corresponding to the time domain resource unit, determining that the H-th sub-time domain resource in the R sub-time domain resources is not a valid PDSCH candidate position.

In some embodiments, the determining module 1301 is further configured to find, after the finding module 1302 finds a PDCCH monitoring opportunity on at least one downlink BWP within a time range corresponding to the second time domain resource, if the PDCCH monitoring opportunity is in the second time domain resource (mth time domain resource)_v-K_0,S) In a time range corresponding to the time domain resource unit, if a PDCCH monitoring opportunity is found on the at least one downlink BWP, the R sub-units are determinedThe H-th sub-time domain resource in the time domain resources is a valid PDSCH candidate location.

In some embodiments, the sub-time domain resource is at least two symbols consecutive in the time domain resource unit.

In some embodiments, the time domain resource units are time slots.

The communication apparatus described above in this embodiment may be configured to execute the technical solutions executed by the terminals in the corresponding method embodiments, and the implementation principles and technical effects are similar, where the functions of each module may refer to corresponding descriptions in the method embodiments, and are not described herein again.

Fig. 14 is a schematic structural diagram of a communication apparatus according to another embodiment of the present application, where the communication apparatus may be a network device or a chip that can be used for the network device, as shown in fig. 14, the communication apparatus according to this embodiment may include: a determination module 1401 and a lookup module 1402. Optionally, the communication apparatus of this embodiment may further include a sending module 1403.

A determining module 1401, configured to determine a second time domain resource according to the first time domain resource and the first information; the first time domain resource is a time domain resource of a PDSCH candidate position, the second time domain resource is a time domain resource of a PDCCH candidate position, and the first information comprises or indicates a time interval between the PDSCH candidate position and the PDCCH candidate position.

A searching module 1402, configured to search, within a time range corresponding to the second time domain resource, a PDCCH monitoring opportunity on at least one downlink BWP.

In some embodiments, the lookup module 1402 is specifically configured to: and searching a PDCCH monitoring opportunity on each downlink BWP in the time domain resource on each downlink BWP in the at least one downlink BWP corresponding to the second time domain resource.

In some embodiments, the sending module 1403 is configured to send the PDSCH before the determining module 1401 determines the second time domain resource according to the first time domain resource and the first information.

The determining module 1401 is further configured to determine the first time domain resource according to a time domain resource used for transmitting data confirmation information corresponding to the PDSCH, and M time intervals between the PDSCH and the data confirmation information, where M is an integer greater than or equal to 1;

In some embodiments, the determining module 1401 is specifically configured to: for each of the M time intervals, if the time domain resource for transmitting the data acknowledgement information corresponding to the PDSCH is an nth time domain resource unit, and a qth time interval of the M time intervals is K_1,QA time domain resource unit, then determining the first time domain resource includes the (n-K) th time domain resource_1,Q) A time domain resource unit. The first time domain resource comprises M time domain resource units, and Q is a positive integer less than or equal to M.

In some embodiments, the determining module 1401 is further configured to, before determining the second time domain resource according to the first time domain resource and the first information, determine J valid PDSCH candidate positions from the I PDSCH candidate positions according to the configured I PDSCH candidate positions in each time domain resource unit on the first activated downlink BWP and the uplink and downlink format in each time domain resource unit, where I is an integer greater than or equal to 1, and J is an integer less than or equal to I; and determining the first information according to the J effective PDSCH candidate positions.

In some embodiments, the first time domain resource includes R sub-time domain resources, the time interval indicated by the first information is T, and R and T are positive integers. The determining module 1401 is specifically configured to: for each of the R sub-time domain resources and each of the T time intervals, if anyH-th sub time domain resource in the R sub time domain resources is positioned at m-th_vWithin a time domain resource unit, and the S-th time interval of the T time intervals is K_0,SThen determining that the second time domain resource comprises the (m) th time domain resource_v-K_0,S) A time domain resource unit. H is a positive integer less than or equal to R, S is a positive integer less than or equal to T, and v is a positive integer.

In some embodiments, the determining module 1401 is further configured to, after the searching module 1402 searches for a PDCCH monitoring opportunity on at least one downlink BWP within a time range corresponding to the second time domain resource, determine that the PDCCH monitoring opportunity is in the (m) th time domain resource in the second time domain resource_v-K_0,S) And if the PDCCH monitoring opportunity is not found on the at least one downlink BWP within the time range corresponding to the time domain resource unit, determining that the H-th sub-time domain resource in the R sub-time domain resources is not a valid PDSCH candidate position.

In some embodiments, the determining module 1401 is further configured to, after the searching module 1402 searches for a PDCCH monitoring opportunity on at least one downlink BWP within a time range corresponding to the second time domain resource, if the PDCCH monitoring opportunity is in the second time domain resource (mth time domain resource)_v-K_0,S) And in a time range corresponding to the time domain resource unit, finding a PDCCH monitoring opportunity on the at least one downlink BWP, and determining that the H-th sub-time domain resource in the R sub-time domain resources is an effective PDSCH candidate position.

In some embodiments, the time domain resource units are time slots.

The communication apparatus described above in this embodiment may be configured to execute the technical solutions executed by the network devices in the corresponding method embodiments, and the implementation principles and technical effects are similar, where the functions of each module may refer to corresponding descriptions in the method embodiments, and are not described herein again.

Fig. 15 is a schematic structural diagram of a communication device according to another embodiment of the present application, and as shown in fig. 15, the communication device according to this embodiment may include: a memory 1501 and a processor 1502. Optionally, the communication device of this embodiment may further include a transceiver 1503.

In one implementation, the communication device may be a terminal, and may also be a chip available for the terminal. The determining module 1301 and the searching module 1302 may be embedded in the processor 1502 in a hardware manner. Alternatively, the receiving module 1303 may be embedded in the processor 1502 in a hardware manner.

Alternatively, the receiving module 1303 may be embedded in the transceiver 1503 in a hardware manner.

Memory 1501 is used to store program instructions, among other things. The program instructions, when invoked, are used by the processor 1502 to implement the schemes described above for the terminal.

In another implementation manner, the communication device may be a network device, and may also be a chip available for the network device. The determination module 1401 and the lookup module 1402 may be embedded in the processor 1502 in a hardware manner. Alternatively, the sending module 1403 may be embedded in the processor 1502 in a hardware manner.

Alternatively, the sending module 1403 may be embedded in the transceiver 1503 in a hardware manner.

Memory 1501 is used to store program instructions, among other things. The program instructions, when invoked, are used by the processor 1502 to implement the schemes described above for the network device.

The program instructions may be implemented in the form of software functional units and may be sold or used as a stand-alone product, and the memory 1501 may be any form of computer-readable storage medium. Based on such understanding, all or part of the technical solutions of the present application may be embodied in the form of a software product, which includes several instructions to make a computer device, specifically, the processor 1502, execute all or part of the steps in the embodiments of the present application. And the aforementioned computer-readable storage media comprise: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

It should be noted that, in the embodiment of the present application, the division of the module is schematic, and is only one logic function division, and there may be another division manner in actual implementation. Each functional module in the embodiments of the present application may be integrated into one processing module, or each module may exist alone physically, or two or more modules are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode.

The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, a network device, or the like) or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

In the above embodiments, the implementation may be wholly or partially realized 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, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website site, computer, server, or data center to another website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.

Claims

1. A method of communication, comprising:

the terminal determines a second time domain resource according to the first time domain resource and the first information; the first time domain resource is a time domain resource of a Physical Downlink Shared Channel (PDSCH) candidate position, the second time domain resource is a time domain resource of a Physical Downlink Control Channel (PDCCH) candidate position, and the first information comprises or indicates a time interval between the PDSCH candidate position and the PDCCH candidate position;

the terminal searches a PDCCH monitoring opportunity on at least one downlink bandwidth part BWP within a time range corresponding to the second time domain resource;

2. The method of claim 1, wherein the terminal searches for a PDCCH monitoring opportunity on at least one downlink BWP within a time range corresponding to the second time domain resource, and wherein the searching comprises:

and the terminal searches the PDCCH monitoring opportunity on each downlink BWP in the time domain resources on each downlink BWP in the at least one downlink BWP corresponding to the second time domain resource.

3. The method according to claim 1 or 2, wherein before the terminal determines the second time domain resource according to the first time domain resource and the first information, the method further comprises:

the terminal receives a PDSCH;

the terminal determines the first time domain resource according to time domain resources used for transmitting data confirmation information corresponding to the PDSCH and M time intervals between the PDSCH and the data confirmation information, wherein M is an integer greater than or equal to 1;

4. The method of claim 3, wherein the terminal determines the first time domain resource according to time domain resources used for transmitting data acknowledgement information corresponding to the PDSCH and M time intervals between the PDSCH and the data acknowledgement information, and comprises:

for each of the M time intervals, if the time domain resource for transmitting the data acknowledgement information corresponding to the PDSCH is an nth time domain resource unit, and a qth time interval of the M time intervals is K_1,QA time domain resource unit, the terminal determines that the first time domain resource comprises the (n-K) th time domain resource_1,Q) A time domain resource unit;

5. The method according to any one of claims 1,2 or 4, wherein before the terminal determines the second time domain resource according to the first time domain resource and the first information, the method further comprises:

the terminal determines J effective PDSCH candidate positions from the I PDSCH candidate positions according to the I PDSCH candidate positions configured in each time domain resource unit on the first activated downlink BWP and the uplink and downlink formats in each time domain resource unit, wherein I is an integer greater than or equal to 1, and J is an integer less than or equal to I;

and the terminal determines the first information according to the J effective PDSCH candidate positions.

6. The method according to any one of claims 1,2 or 4, wherein the first time domain resource comprises R sub-time domain resources, the first information indicates T time intervals, and R and T are positive integers;

the terminal determines a second time domain resource according to the first time domain resource and the first information, and the method comprises the following steps:

for each of the R sub-time domain resources and each of the T time intervals, if an H-th sub-time domain resource of the R sub-time domain resources is located at an mth time interval_vWithin a time domain resource unit, and the S-th time interval of the T time intervals is K_0,SThe terminal determines that the second time domain resource includes the (m) th time domain resource_v-K_0,S) A time domain resource unit;

7. The method of claim 6, wherein after the terminal finds a PDCCH monitoring opportunity on at least one downlink BWP within a time range corresponding to the second time domain resource, the method further comprises:

if in the second time domain resource is the (m) th_v-K_0,S) And if the PDCCH monitoring opportunity is not found on the at least one downlink BWP within the time range corresponding to the time domain resource unit, the terminal determines that the H-th sub-time domain resource in the R sub-time domain resources is not a valid PDSCH candidate position.

8. The method of claim 6, wherein after the terminal finds a PDCCH monitoring opportunity on at least one downlink BWP within a time range corresponding to the second time domain resource, the method further comprises:

if in the second time domain resource is the (m) th_v-K_0,S) And in a time range corresponding to the time domain resource unit, finding a PDCCH monitoring opportunity on the at least one downlink BWP, and then the terminal determines that the H-th sub-time domain resource in the R sub-time domain resources is an effective PDSCH candidate position.

9. A method of communication, comprising:

the network equipment determines a second time domain resource according to the first time domain resource and the first information; the first time domain resource is a time domain resource of a Physical Downlink Shared Channel (PDSCH) candidate position, the second time domain resource is a time domain resource of a Physical Downlink Control Channel (PDCCH) candidate position, and the first information comprises or indicates a time interval between the PDSCH candidate position and the PDCCH candidate position;

the network device searches a PDCCH monitoring opportunity on at least one downlink bandwidth part BWP within a time range corresponding to the second time domain resource;

10. The method of claim 9, wherein the network device searches for a PDCCH monitoring opportunity on at least one downlink BWP within a time range corresponding to the second time domain resource, comprising:

the network device searches for a PDCCH monitoring opportunity on each downlink BWP in the time-domain resource on each downlink BWP in the at least one downlink BWP corresponding to the second time-domain resource.

11. The method according to claim 9 or 10, wherein before the network device determines the second time domain resource according to the first time domain resource and the first information, the method further comprises:

the network equipment sends a PDSCH;

the network equipment determines the first time domain resource according to time domain resources used for transmitting data confirmation information corresponding to the PDSCH and M time intervals between the PDSCH and the data confirmation information, wherein M is an integer greater than or equal to 1;

12. The method of claim 11, wherein the network device determines the first time domain resource according to time domain resources used for transmitting data acknowledgement information corresponding to the PDSCH and M time intervals between the PDSCH and the data acknowledgement information, and comprises:

for each of the M time intervals, if the time domain resource for transmitting the data acknowledgement information corresponding to the PDSCH is an nth time domain resource unit, and a qth time interval of the M time intervals is K_1,QA time domain resource unit, the network device determines that the first time domain resource includes the (n-K) th time domain resource_1,Q) A time domain resource unit;

13. The method according to any one of claims 9, 10 or 12, wherein before the network device determines the second time domain resource according to the first time domain resource and the first information, the method further comprises:

the network equipment determines J effective PDSCH candidate positions from the I PDSCH candidate positions according to the I PDSCH candidate positions configured in each time domain resource unit on the first activated downlink BWP and the uplink and downlink formats in each time domain resource unit, wherein I is an integer greater than or equal to 1, and J is an integer less than or equal to I;

and the network equipment determines the first information according to the J effective PDSCH candidate positions.

14. The method according to any one of claims 9, 10 or 12, wherein the first time domain resource comprises R sub-time domain resources, the first information indicates T time intervals, and R and T are positive integers;

the network device determines a second time domain resource according to the first time domain resource and the first information, and the determining includes:

for each of the R sub-time domain resources and each of the T time intervals, if an H-th sub-time domain resource of the R sub-time domain resources is located at an mth time interval_vWithin a time domain resource unit, and the S-th time interval of the T time intervals is K_0,SThen the network device determines that the second time domain resource comprises the (m) th time domain resource_v-K_0,S) A time domain resource unit;

15. The method of claim 14, wherein after the network device finds a PDCCH monitoring opportunity on at least one downlink BWP within a time range corresponding to the second time domain resource, the method further comprises:

if in the second time domain resource is the (m) th_v-K_0,S) If the PDCCH monitoring opportunity is not found on the at least one downlink BWP within the time range corresponding to the time domain resource unit, the network device determines that the H-th sub-time domain resource of the R sub-time domain resources is not a valid PDSCH candidate location.

16. The method of claim 14, wherein after the network device finds a PDCCH monitoring opportunity on at least one downlink BWP within a time range corresponding to the second time domain resource, the method further comprises:

if in the second time domain resource is the (m) th_v-K_0,S) And in a time range corresponding to the time domain resource unit, finding a PDCCH monitoring opportunity on the at least one downlink BWP, and then the network equipment determines that the H-th sub-time domain resource in the R sub-time domain resources is a valid PDSCH candidate position.

17. A communications apparatus, comprising: a memory and a processor;

the memory for storing program code;

the processor, invoking the program code, when executed, is configured to perform the communication method of any of claims 1-8 or any of claims 9-16.

18. A computer-readable storage medium comprising instructions that, when executed on a communication apparatus, cause the communication apparatus to perform the communication method of any one of claims 1-8 or any one of claims 9-16.