CN110351019B - Communication method and device - Google Patents

Abstract

Embodiments of the present application provide a communication method and apparatus, the method includes: a terminal determines a second time domain resource according to a first time domain resource and first information; the first time domain resource is a time domain resource of a PDSCH candidate position, and the first time domain resource is The second time domain resource is the time domain resource of the PDCCH candidate position, and the first information includes or indicates the time interval between the PDSCH candidate position and the PDCCH candidate position; within the time range corresponding to the second time domain resource, search for the PDCCH on at least one downlink BWP Listening opportunity; at least one downlink BWP includes: all downlink BWPs configured by the network device to the terminal, or all downlink BWPs configured by the network device to the terminal and activated within the time range corresponding to the second time domain resource. Therefore, all PDCCH listening opportunities corresponding to PDSCH can be found, so as to avoid missing PDCCH listening opportunities and missing data confirmation information of downlink data, thereby improving communication quality.

Description

Communication method and device

technical field

The embodiments of the present application relate to the field of communication technologies, and in particular, to a communication method and apparatus.

Background technique

Generally, after receiving the data sent by the sender, the receiver sends a data acknowledgment message to the sender. If the data received by the receiver is correct, the data acknowledgment message sent by the receiver to the sender is a positive acknowledgment (ACK). If the data received by the receiver is in error, the data acknowledgment information sent by the receiver to the sender is a negative acknowledgment (NACK). Taking the downlink transmission between the base station and the terminal as an example, when the terminal feeds back data acknowledgment information to the base station, the terminal may send the data acknowledgment information of multiple physical downlink shared channels (PDSCH) (used to carry downlink data) to the base station. Feedback to the base station at the same time. In the prior art, it is possible to determine which PDSCH data acknowledgment information is fed back to the base station simultaneously in a semi-static manner. The specific process is: according to the time interval between the configured PDSCH and the corresponding data acknowledgment information, and the time interval between PDSCH and PDCCH, and The symbol of the PDSCH candidate position in each time slot determines the time slot of the PDCCH candidate position, and then searches for the PDCCH monitoring opportunity (PDCCH monitoring occasion) in the time slot of these physical downlink control channel (Physical Downlink ControlChannel, PDCCH) candidate positions, and then It is determined that the data determination information of the PDSCH corresponding to the PDCCH listening opportunity is found and fed back to the base station at the same time.

In the 5G system, the system bandwidth can be very large, such as 200MHz or 400MHz. Some terminals cannot support such a large bandwidth. Therefore, the base station can configure a bandwidth part (BWP) for the terminal, that is, the system bandwidth occupied between the base station and the terminal part of the bandwidth (for example, 20MHz) to communicate. Among them, BWP can be divided into downlink BWP (Downlink BWP, DL BWP) and uplink BWP (Uplink BWP, UL BWP). The network device can configure multiple DL BWPs and multiple UL BWPs for the terminal, and activate at least one DL BWP and at least one DL BWP. For one UL BWP, the terminal receives the downlink signal sent by the base station on the activated DLBWP (that is, the active DL BWP); the terminal sends the uplink signal on the activated UL BWP. When the base station communicates with the terminal on the activated DL BWP and UL BWP, the base station can activate another BWP (DL or UL), so that the terminal switches to the newly activated BWP to receive or transmit data. Currently, a DCI (scheduling DCI) of scheduling data is used to perform BWP switching (switching), wherein the DCI is carried on the PDCCH. For example, the terminal receives a PDCCH (carrying DCI) on downlink BWP 0, and the DCI schedules the terminal to receive data on downlink BWP 1. At this time, the terminal will switch from downlink BWP 0 to downlink BWP 1, that is, the activated BWP is set by BWP 0 is converted to BWP 1, and then the terminal receives data on downlink BWP 1, and sends data acknowledgment information of multiple PDSCHs to the network device on downlink BWP 1. Since the downlink BWP activated at this time is only downlink BWP 1, the terminal will check whether there is a PDCCH listening opportunity on downlink BWP 1. However, if the PDCCH is transmitted on downlink BWP0 and its scheduled PDSCH is transmitted on downlink BWP1, it will lead to The problem that the PDCCH listening opportunity corresponding to the PDSCH cannot be found on the downlink BWP1.

SUMMARY OF THE INVENTION

The present application provides a communication method and apparatus for avoiding the phenomenon of missing PDCCH listening opportunities.

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

Wherein, the at least one downlink BWP includes: all downlink BWPs configured by the network device to the terminal, or the at least one downlink BWP includes: configured by the network device to the terminal, and in the second time domain resource All downlink BWPs that have been activated within the corresponding time range.

In the first embodiment of the first aspect, the terminal searches for a PDCCH listening opportunity on at least one downlink BWP within a time range corresponding to the second time domain resource, including: In the time domain resource on each downlink BWP in the at least one downlink BWP corresponding to the domain resource, search for a PDCCH listening opportunity on each downlink BWP.

According to the first aspect or the first embodiment of the first aspect, in a second 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 first receives PDSCH, and then determine the first time domain resource according to the time domain resources used to transmit the data confirmation information corresponding to the PDSCH, and M types of time intervals between the PDSCH and the data confirmation information, where M is greater than or an integer equal to 1.

The determined first time domain resources include: time domain resources corresponding to the first activated downlink BWP.

According to the second embodiment of the first aspect, in the third embodiment of the first aspect, the terminal uses time domain resources for transmitting data acknowledgement information corresponding to the PDSCH, and the PDSCH and the data acknowledgement M types of time intervals between messages, to determine the first time domain resource, including:

For each of the M types of time intervals, if the time-domain resource used for transmitting the data acknowledgement information corresponding to the PDSCH is the n-th time-domain resource unit, and the Q-th resource element in the M types of time intervals If the time interval is K _1,Q time domain resource units, the terminal determines that the first time domain resource includes the (nK _1,Q )th time domain resource unit. Wherein, the first time domain resource includes M time domain resource units, and the 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, the terminal determines, according to the first time domain resource and the first information, the first Before the two time domain resources, firstly, according to the one 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, from the one Among the PDSCH candidate positions, J types of valid PDSCH candidate positions are determined, and then the first information is determined according to the J types of 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 1.

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, and the first time domain resource includes R sub-time domain resources. There are T types of time intervals indicated by a piece of information, and the R and the T are positive integers. The terminal determines the second time domain resource according to the first time domain resource and the first information, including: for each sub-time domain resource in the R sub-time domain resources, and for each of the T types of time intervals Time interval, if the H th sub-time domain resource in the R sub-time domain resources is located in the m _v th time domain resource unit, and the S th time interval in the T time intervals is K _0,S , then the The terminal determines that the second time domain resource includes the (m _v -K _0,S )th time domain resource element. The H is a positive integer less than or equal to R, the S is a positive integer less than or equal to T, and the 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 listening opportunity on at least one downlink BWP within a time range corresponding to the second time domain resource, If no PDCCH listening opportunity is found on the at least one downlink BWP within the time range corresponding to the (m _v -K _0,S )th time domain resource element in the second time domain resource, the terminal determines that The H-th sub-time-domain resource among the R sub-time-domain resources is not a valid PDSCH candidate position.

According to the fifth embodiment or the sixth embodiment of the first aspect, in the seventh embodiment of the first aspect, the terminal searches on at least one downlink BWP within a time range corresponding to the second time domain resource After the PDCCH monitoring opportunity, if a PDCCH monitoring opportunity is found on the at least one downlink BWP within the time range corresponding to the (m _v -K _0,S ) time domain resource unit in the second time domain resource, then The terminal determines that the Hth sub-time domain resource in the R sub-time domain resources is a valid PDSCH candidate position.

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

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

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

Wherein, the at least one downlink BWP includes: all downlink BWPs configured by the network device to the terminal, or the at least one downlink BWP includes: configured by the network device to the terminal, and in the second time domain resource All downlink BWPs that have been activated within the corresponding time range.

In a first embodiment of the second aspect, the network device searches for a PDCCH listening opportunity on at least one downlink BWP within a time range corresponding to the second time domain resource, including: In the time domain resources on each downlink BWP in the at least one downlink BWP corresponding to the two time domain resources, search for a PDCCH listening opportunity on each downlink BWP.

According to the second aspect or the first embodiment of the second aspect, in the second 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 first Send the PDSCH, and then determine the first time domain resource according to the time domain resources used to transmit the data confirmation information corresponding to the PDSCH, and M time intervals between the PDSCH and the data confirmation information, where M is Integer greater than or equal to 1. The determined first time domain resources include: time domain resources corresponding to the first activated downlink BWP.

According to the second embodiment of the second aspect, in the third embodiment of the second aspect, the network device uses the time domain resource for transmitting the data acknowledgement information corresponding to the PDSCH, and the PDSCH and the data M types of time intervals between confirmation messages, and determining the first time domain resource, including:

For each of the M types of time intervals, if the time-domain resource used for transmitting the data acknowledgement information corresponding to the PDSCH is the n-th time-domain resource unit, and the Q-th resource element in the M types of time intervals If the time interval is K _1,Q time domain resource units, the network device determines that the first time domain resource includes the (nK _1,Q )th time domain resource unit. Wherein, the first time domain resource includes M time domain resource units, and the 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, the network device determines, according to the first time domain resource and the first information, Before the second time domain resource, according to the one 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, from the I J kinds of valid PDSCH candidate positions are determined from among the kinds of PDSCH candidate positions, and then the first information is determined according to the J kinds of 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 1.

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, and the first time domain resource includes R sub-time domain resources. There are T types of time intervals indicated by a piece of information, and the R and the T are positive integers. The network device determines the second time domain resource according to the first time domain resource and the first information, including: for each sub-time domain resource in the R sub-time domain resources, and for each of the T types of time intervals; a time interval, if the Hth sub-time domain resource in the R sub-time domain resources is located in the m _vth time-domain resource unit, and the S-th time interval in the T time intervals is K _0,S , then The network device determines that the second time domain resource includes the (m _v -K _0,S )th time domain resource unit. The H is a positive integer less than or equal to R, the S is a positive integer less than or equal to T, and the v is a positive integer.

According to a fifth embodiment of the second aspect, in the sixth embodiment of the second aspect, the network device searches for a PDCCH listening opportunity on at least one downlink BWP within a time range corresponding to the second time domain resource , if no PDCCH listening opportunity is found on the at least one downlink BWP within the time range corresponding to the (m _v -K _0,S )th time domain resource unit in the second time domain resource, the network The device determines that the Hth sub-time domain resource in the R sub-time domain resources is not a valid PDSCH candidate position.

According to the fifth or sixth embodiment of the second aspect, in the seventh embodiment of the second aspect, the network device is on at least one downlink BWP within a time range corresponding to the second time domain resource After searching for a PDCCH listening opportunity, if a PDCCH listening opportunity is found on the at least one downlink BWP within the time range corresponding to the (m _v -K _0,S ) time domain resource element in the second time domain resource, Then the network device determines that the Hth sub-time domain resource in the R sub-time domain resources is a valid PDSCH candidate position.

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

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

In a third aspect, an embodiment of the present application provides a communication device, including: a determination module and a search module.

A determination module, 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 the time domain resource of the PDSCH candidate position, and the second time domain resource is the time domain of the PDCCH candidate position domain resource, the first information includes or indicates the time interval between the PDSCH candidate position and the PDCCH candidate position.

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

Wherein, the at least one downlink BWP includes: all downlink BWPs configured by the network device to the terminal, or the at least one downlink BWP includes: configured by the network device to the terminal and within the time range corresponding to the second time domain resource All downstream BWPs that have been activated in the past.

In the first embodiment of the third aspect, the search module is specifically configured to: in the time domain resources on each downlink BWP in the at least one downlink BWP corresponding to the second time domain resource, in the Search for PDCCH listening opportunities on each downlink BWP.

According to the third aspect or the first embodiment of the third aspect, in a second embodiment of the third aspect, the communication apparatus further includes: 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 according to the time domain resources used to transmit the data acknowledgement information corresponding to the PDSCH and M kinds of time intervals between the PDSCH and the data acknowledgement information resource, M is an integer greater than or equal to 1. The determined first time domain resources include: time domain resources corresponding to the first activated downlink BWP.

According to the second embodiment of the third aspect, in the third embodiment of the third aspect, the determining module is specifically configured to: for each time interval in the M kinds of time intervals, if the The time domain resource of the data acknowledgment information corresponding to the PDSCH is the nth time domain resource unit, and the Qth time interval in the M types of time intervals is K _{1, Q} time domain resource units, then determine that the first The time domain resource includes the (nK _1,Q )th time domain resource unit. Wherein, the first time domain resource includes M time domain resource units, and the 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, the determining module is further configured to: One piece of information, before determining the second time domain resource, according to one PDSCH candidate position 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, from J kinds of valid PDSCH candidate positions are determined in the described 1 kinds of PDSCH candidate positions, the 1 is an integer greater than or equal to 1, and the J is an integer smaller than or equal to 1; and according to the J kinds of valid PDSCH candidate positions , and determine the first information.

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, and the first time domain resource includes R sub-time domain resources. There are T types of time intervals indicated by a piece of information, and the R and the T are positive integers. The determining module is specifically configured to: for each sub-time domain resource in the R sub-time domain resources, and each time interval in the T kinds of time intervals, if the third sub-time domain resource in the R sub-time domain resources The sub-time domain resources are located in the m _v th time domain resource unit, and the S th time interval in the T types of time intervals is K _0,S , then it is determined that the second time domain resources include the (m _v -K th time interval) _0,S ) time domain resource unit;

The H is a positive integer less than or equal to R, the S is a positive integer less than or equal to T, and the 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, within a time range corresponding to the second time domain resource by the searching module, at least After searching for a PDCCH listening opportunity on one downlink BWP, if no search is performed on the at least one downlink BWP within the time range corresponding to the (m _v -K _0,S )th time domain resource element in the second time domain resource When the PDCCH listening opportunity is reached, it is determined that the Hth sub-time domain resource in the R sub-time domain resources is not a valid PDSCH candidate position.

According to the fifth or sixth embodiment of the third aspect, in the seventh embodiment of the third aspect, the determining module is further configured to, at the time corresponding to the second time domain resource by the searching module, Within the range, after searching for the PDCCH listening opportunity on at least one downlink BWP, if within the time range corresponding to the (m _v -K _0,S ) time domain resource element in the second time domain resource, the at least one When the PDCCH listening opportunity is found on the downlink BWP, it is determined that the Hth sub-time domain resource in the R sub-time domain resources is a valid 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 resource is at least two consecutive symbols in the time domain resource unit.

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

It should be noted that, the communication device of the third aspect may be a terminal, or a chip that can be used for a terminal.

In a fourth aspect, an embodiment of the present application provides a communication device, including: a determination module and a search module.

A determination module, 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 the time domain resource of the PDSCH candidate position, and the second time domain resource is the time domain of the PDCCH candidate position domain resource, the first information includes or indicates the time interval between the PDSCH candidate position and the PDCCH candidate position.

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

Wherein, the at least one downlink BWP includes: all downlink BWPs configured by the network device to the terminal, or the at least one downlink BWP includes: configured by the network device to the terminal and within the time range corresponding to the second time domain resource All downstream BWPs that have been activated in the past.

In a first embodiment of the fourth aspect, the search module is specifically configured to: in the time domain resources on each downlink BWP in the at least one downlink BWP corresponding to the second time domain resource, in the Search for PDCCH listening opportunities on each downlink BWP.

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 includes: 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 according to the time domain resources used to transmit the data acknowledgement information corresponding to the PDSCH and M kinds of time intervals between the PDSCH and the data acknowledgement information resource, M is an integer greater than or equal to 1. The determined first time domain resources include: time domain resources corresponding to 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 time interval in the M kinds of time intervals, if the The time domain resource of the data acknowledgment information corresponding to the PDSCH is the nth time domain resource unit, and the Qth time interval in the M types of time intervals is K _{1, Q} time domain resource units, then determine that the first The time domain resource includes the (nK _1,Q )th time domain resource unit. Wherein, the first time domain resource includes M time domain resource units, and the 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: One piece of information, before determining the second time domain resource, according to one PDSCH candidate position 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, from J kinds of valid PDSCH candidate positions are determined in the described 1 kinds of PDSCH candidate positions, the 1 is an integer greater than or equal to 1, and the J is an integer smaller than or equal to 1; and according to the J kinds of valid PDSCH candidate positions , and determine the first information.

According to the fourth aspect or any one of the first to fourth embodiments of the fourth aspect, in a fifth embodiment of the fourth aspect, the first time domain resource includes R sub-time domain resources, and the first time domain resource includes R sub-time domain resources. There are T types of time intervals indicated by a piece of information, and the R and the T are positive integers. The determining module is specifically configured to: for each sub-time domain resource in the R sub-time domain resources, and each time interval in the T kinds of time intervals, if the third sub-time domain resource in the R sub-time domain resources The sub-time domain resources are located in the m _v th time domain resource unit, and the S th time interval in the T types of time intervals is K _0,S , then it is determined that the second time domain resources include the (m _v -K th time interval) _0,S ) time domain resource unit;

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

According to a fifth embodiment of the fourth aspect, in a sixth embodiment of the fourth aspect, the determining module is further configured to, within a time range corresponding to the second time domain resource by the searching module, at least After searching for a PDCCH listening opportunity on one downlink BWP, if no search is performed on the at least one downlink BWP within the time range corresponding to the (m _v -K _0,S )th time domain resource element in the second time domain resource When the PDCCH listening opportunity is reached, it is determined that the Hth sub-time domain resource in the R sub-time domain resources is not a valid PDSCH candidate position.

According to the fifth or sixth embodiment of the fourth aspect, in the seventh embodiment of the fourth aspect, the determining module is further configured to, at the time corresponding to the second time domain resource by the searching module, Within the range, after searching for the PDCCH listening opportunity on at least one downlink BWP, if within the time range corresponding to the (m _v -K _0,S ) time domain resource element in the second time domain resource, the at least one When the PDCCH listening opportunity is found on the downlink BWP, it is determined that the Hth sub-time domain resource in the R sub-time domain resources is a valid PDSCH candidate position.

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

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

It should be noted that, the communication apparatus of the fourth aspect may be a network device or a chip that can be used for a network device.

In a fifth aspect, an embodiment of the present application provides a communication device, including: a memory and a processor. The memory is used to store program codes. The processor invokes the program code, and when the program code is executed, is configured to execute the communication method according to any embodiment of the present application in the first aspect or any embodiment of the present application in the second aspect.

In a sixth aspect, an embodiment of the present application provides a readable storage medium, and a computer program is stored on the readable storage medium; when the computer program is executed, any embodiment of the present application or the second aspect of the first aspect is implemented. Aspects The communication method described in any embodiment of the present application.

In a seventh aspect, an embodiment of the present application provides a program product, the program product includes a computer program, and the computer program is stored in a readable storage medium, and at least one processor of a communication device can read from the readable storage medium Taking the computer program, the at least one processor executes the computer program so that the communication apparatus implements the communication method described in any embodiment of the present application in the first aspect or in any embodiment of the present application in the second aspect.

To sum up, in the communication method and device, the second time domain resource is determined according to the first time domain resource and the first information; the first time domain resource is the time domain resource of the PDSCH candidate position, and the second time domain resource is The time domain resource is the time domain resource of the PDCCH candidate position, and the first information includes or indicates the time interval between the PDSCH candidate position and the PDCCH candidate position; then, within the time range corresponding to the second time domain resource, the network device is configured to the terminal Search for PDCCH listening opportunities on all downlink BWPs of All the corresponding PDCCH listening opportunities can avoid the phenomenon of missing the PDCCH monitoring opportunities, avoid the situation of missing the data confirmation information of the downlink data, and thus improve the communication quality.

Description of drawings

FIG. 1 is a schematic diagram of a communication system provided by an embodiment of the present application;

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;

3 is a schematic diagram of a terminal feeding back data confirmation information corresponding to multiple PDSCHs to a network device according to an embodiment of the present application;

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

FIG. 5 is a flowchart of a communication method provided by 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 a first time domain resource according to an embodiment of the present application;

FIG. 8 is a schematic diagram of comparing time domain resources of PDSCH candidate positions with uplink and downlink formats according to an embodiment of the present application;

FIG. 9 is a schematic diagram of the relationship between time domain resources between PDCCH and PDSCH under downlink BWP hopping provided by an embodiment of the present application;

10 is a schematic diagram of the relationship between time domain resources between PDCCH and PDSCH under downlink BWP hopping provided by an embodiment of the present application;

11 is a schematic diagram of the relationship between time domain resources between PDCCH and PDSCH under downlink BWP hopping provided by an embodiment of the present application;

12 is a schematic diagram of the relationship between time domain resources between PDCCH and PDSCH under downlink BWP hopping provided by an embodiment of the present application;

FIG. 13 is a schematic structural diagram of a communication device provided by an embodiment of the present application;

FIG. 14 is a schematic structural diagram of a communication device provided by another embodiment of the present application;

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

Detailed ways

FIG. 1 is a schematic diagram of a communication system provided by an embodiment of the present application. As shown in FIG. 1 , the communication system includes a network device and a terminal.

Hereinafter, some terms in this application will be explained so as to facilitate the understanding of those skilled in the art:

Network equipment: Also known as Radio Access Network (RAN) equipment, it is a device that accesses terminals to a wireless network, and can be an evolved base station (Evolutional) in Long Term Evolution (LTE). Node B, eNB or eNodeB), or a relay station or an access point, or a base station in a 5G network, such as a transmission and reception point (Transmission and Reception Point, TRP), and a controller, which are not limited herein. In a possible manner, the radio access network device may be a base station (eg, gNB) with a separate architecture for CU and DU.

Terminal: It can be a wireless terminal or a wired terminal. A wireless terminal can refer to a device with wireless transceiver function, which can be deployed on land, including indoor or outdoor, hand-held or vehicle-mounted; it can also be deployed on water (such as ships). etc.); can also be deployed in the air (eg on airplanes, balloons, satellites, etc.). The terminal may be a mobile phone (mobilephone), a tablet computer (Pad), a computer with a wireless transceiver function, a virtual reality (Virtual Reality, VR) terminal, an augmented reality (Augmented Reality, AR) terminal, an industrial control (industrial control) terminal. wireless terminal in self driving, wireless terminal in remote medical, wireless terminal in smart grid, wireless terminal in transportation safety, smart Wireless terminals in a city (smart city), wireless terminals in a smart home (smart home), etc., are not limited here. It can be understood that, in this embodiment of the present application, the terminal may also be referred to as user equipment (user equipment, UE).

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

1. The network device sends Downlink Control Information (DCI) to the terminal. The DCI contains downlink data scheduling information, which is used to inform the terminal of what time-frequency resource location and what configuration parameters (such as modulation and coding strategy ( Modulation and Coding Scheme, MCS), redundancy version (RedundancyVersion, RV, etc.) to receive and demodulate data.

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

3. After receiving the data, the terminal also needs to feed back a hybrid automatic repeat request (Hybrid Automatic Repeat reQuest, HARQ)-data acknowledgment information to the network device, which may also be called HARQ-ACK information. Among them, HARQ is a technology formed by combining forward error correction code (Forward Error Correction, FEC) and automatic repeat request (Automatic RepeatreQuest, ARQ). By adding redundant information, FEC enables the terminal to correct some errors, thereby reducing the number of retransmissions. For errors that cannot be corrected by FEC, the terminal will request the network device to resend the data through the ARQ mechanism. The terminal uses an error detection code, usually a cyclic redundancy check (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 acknowledgment (ACK) to the sender, and the network device will send the next data packet after receiving the ACK. If there is an error, the terminal will discard the data packet and send a negative data acknowledgment (NACK) to the network device. After the network device receives the NACK, it will resend the same data.

The above process can be referred to as shown in FIG. 2 , which 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, wherein the PDCCH carries DCI, and the PDSCH carries downlink data. In some embodiments, when the terminal feeds back data confirmation information to the network device, it may feed back data confirmation information corresponding to multiple PDSCHs on the same time domain resource. As shown in FIG. 3 , FIG. 3 is a schematic diagram of a terminal feeding back data confirmation information corresponding to multiple PDSCHs to a network device according to an embodiment of the application. FIG. 3 takes three PDSCHs as an example, and the three PDSCHs need resources in the same time domain Feedback data confirmation information, in the absence of space division multiplexing and code block group (code block group, CBG)-based transmission and other technologies, the size of the codebook of the corresponding data confirmation information at this time is 3 bits, 3 The order of bits may be determined according to the order of PDSCH reception. Among them, the specific process of determining which PDSCH corresponding data acknowledgment information is fed back to the network device in the same time domain resource is: according to the time interval between the PDSCH and the corresponding data acknowledgment information, and the time interval between PDSCH and PDCCH and each time slot. The symbol occupied by the PDSCH candidate position in the middle, determine the time slot of the PDCCH candidate position, and then check whether there is a PDCCH listening opportunity in the time slot of these PDCCH candidate positions, and then determine that the PDSCH corresponding to the PDCCH listening opportunity is found. Feedback to the network device at the same time.

In the 5G system, the network equipment and the terminal use BWP to communicate, as shown in Figure 4. Figure 4 takes the time interval between PDSCH and PDCCH as 0 timeslot as an example. In timeslot 1, the activated downlink BWP hops from the downlink BWP0 Turn to downlink BWP1, wherein, in time slot 1, on downlink BWP0, the network device sends the PDCCH to the terminal, and the PDCCH schedules the PDSCH in the same time slot, so in time slot 1, on the downlink BWP1, the network device sends the terminal to the terminal PDSCH. However, the solution in the prior art is to search for PDCCH listening opportunities in the time slots (eg, time slots 0, 1, and 2) of the PDCCH candidate positions on the activated downlink BWP (ie, downlink BWP1) when sending data acknowledgment information. If there is no PDCCH listening opportunity on downlink BWP1 in time slot 1, so it is considered that there is no valid PDSCH transmission in time slot 1, the data acknowledgment information corresponding to PDSCH in time slot 1 is not fed back to the network device. However, it can be seen that there is a PDCCH listening opportunity in time slot 1 on the downlink BWP0 (the PDSCH in time slot 1 is scheduled by the PDCCH in time slot 1 on BWP0). Therefore, in the prior art, searching for PDCCH listening opportunities on the downlink BWP (only one downlink BWP) that is activated only when sending data acknowledgment information causes the problem of missing PDCCH listening opportunities, thereby causing some downlink data data acknowledgment information Issues not reported to network devices. The following embodiments of the present application can solve this technical problem.

FIG. 5 is a flowchart of a communication method provided by an embodiment of the present application. As shown in FIG. 5 , the method of this embodiment may be applied to a terminal or a network device, and the method of this embodiment may include:

S501. Determine a second time domain resource according to the first time domain resource and the first information.

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

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

S502. Search for a PDCCH listening opportunity on at least one downlink BWP within a time range corresponding to the second time domain resource.

In this embodiment, after determining the second time domain resource, the terminal and/or the network device searches for a PDCCH listening opportunity on at least one downlink BWP within a time range corresponding to the second time domain resource. Since this embodiment does not only search for PDCCH listening opportunities on the downlink BWP activated when transmitting the data acknowledgement information (that is, only one downlink BWP), but searches for PDCCH listening opportunities on at least one downlink BWP, it reduces the chance of missing PDCCH monitoring. The phenomenon.

In some embodiments, the above-mentioned at least one downlink BWP includes: all downlink BWPs configured by the network device to the terminal. That is, after determining the second time domain resource, the terminal and/or the network device searches for PDCCH listening opportunities on all downlink BWPs configured by the network device to the terminal within the time range corresponding to the second time domain resource. If all the downlink BWPs configured by the network device to the terminal include: downlink BWP0, downlink BWP1, and downlink BWP2, for the situation shown in FIG. 4, the terminal and/or the network device in this embodiment may be on the downlink BWP0, downlink BWP1, and downlink BWP2 Both search for PDCCH listening opportunities, so that the PDCCH listening opportunities on the downlink BWP1 that have been missed in the current technology can be found. Therefore, the present embodiment can avoid the situation of missing to check the PDCCH listening opportunity.

In some embodiments, the at least one downlink BWP is: all downlink BWPs configured by the network device to the terminal and activated within a time range corresponding to the second time domain resource. That is, after the terminal and/or the network device determines the second time domain resource, within the time range corresponding to the second time domain resource, the network device configures the terminal within the time range corresponding to the second time domain resource. The activated downlink BWP searches for PDCCH listening opportunities. If all the downlink BWPs configured by the network device to the terminal include: downlink BWP0, downlink BWP1, and downlink BWP2, for the situation shown in FIG. 4, if the second time domain resource is time slot 1 shown in FIG. The activated downlink BWP is jumped from the downlink BWP0 to the downlink BWP1. In the time range corresponding to time slot 1, the activated downlink BWPs are the downlink BWP0 and the downlink BWP1, and the terminal and/or the network device in this embodiment can be in the downlink Both the BWP0 and the downlink BWP1 search for the PDCCH listening opportunity, so that the PDCCH monitoring opportunity on the downlink BWP1 that has been missed in the current technology can be found. Therefore, the present embodiment can avoid the situation of missing to check the PDCCH listening opportunity.

It can be seen that, in this embodiment, the second time domain resource is determined according to the first time domain resource and the first information; the first time domain resource is the time domain resource of the PDSCH candidate position, and the second time domain resource is the PDCCH candidate The time domain resource of the location, the first information includes or indicates the time interval between the PDSCH candidate location and the PDCCH candidate location; then within the time range corresponding to the second time domain resource, all downlink BWPs configured by the network device to the terminal are Search for PDCCH listening opportunities on the Internet, or search for PDCCH listening opportunities on all downlink BWPs configured by the network device to the terminal and activated within the time range corresponding to the second time domain resource, so that the corresponding PDSCH can be found. All PDCCH monitoring opportunities can avoid the phenomenon of missing PDCCH monitoring opportunities, and avoid the situation of missing data confirmation information of downlink data, thereby improving the communication quality.

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

Wherein, the subcarrier intervals are different, and correspondingly, 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 makes the time lengths of the time domain resource units corresponding to the at least one downlink BWP different. For example, if the subcarrier spacing of downlink BWP0 is 15KHz and the subcarrier spacing of downlink BWP1 is 30KHz, the time length of the time domain resource unit corresponding to the downlink BWP0 is twice the time length of the time domain resource unit of the downlink BWP1. If the subcarrier spacing of the downlink BWP0 is 30KHz and the subcarrier spacing 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 BWP1. Therefore, at the same time, the time domain resources on the downlink BWP0 are different from the time domain resources on the downlink BWP1.

Therefore, when the terminal and/or the network device searches for a PDCCH listening opportunity in 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 time domain resource on each downlink BWP needs to be converted. In the domain resource, search for PDCCH listening opportunities on each of the downlink BWPs. Wherein, the terminal and/or the network device determining the time domain resources on each downlink BWP in the at least one downlink BWP may, for example, include: the terminal and/or the network device determining the length of the time domain resource unit of each downlink BWP in the at least one downlink BWP , and then 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, determine the time domain resource on each downlink BWP corresponding to the second time domain resource . Wherein, the time domain resource unit in this embodiment may be a time slot, but this embodiment is not limited to this, and the time domain resource may also be divided in other ways. Taking the time domain resource unit as a time slot as an example, if the length of the time domain resource unit corresponding to the second time domain resource is twice the length of the time domain resource unit on one of the downlink BWPs, if the second time domain resource is slot 1, the time domain resources on the downlink BWP corresponding to the second time domain resource are time slot 2 and time slot 3, as shown in FIG. 6 , for example.

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 time domain resources corresponding to the first activated downlink BWP, and the first activated downlink BWP may refer to the downlink BWP in an activated state when the terminal feeds back data confirmation information.

In some embodiments, if the above embodiments are executed by the terminal, before the terminal executes the above S501, the terminal also receives the PDSCH, for example, receives the PDSCH sent by the network device, and then according to the time used to transmit the data confirmation information corresponding to the PDSCH domain resources, and M kinds of time intervals between the PDSCH and the data acknowledgment information, to determine the first time domain resources.

In some embodiments, if the above embodiments are executed by the network device, before the network device executes the above S501, the PDSCH is also sent, for example, the PDSCH is sent to the terminal, and then according to the time domain used for transmitting the data confirmation information corresponding to the PDSCH resources, and M types of time intervals between the PDSCH and the data acknowledgement information to determine the first time domain resource.

Wherein, the above-mentioned M is an integer greater than or equal to 1; wherein, the determined first time domain resources include: time domain resources corresponding to the first activated downlink BWP. The first activated downlink BWP may refer to a downlink BWP in an activated state when the terminal feeds back data confirmation information. The data acknowledgment information corresponding to the PDSCH is transmitted through the activated uplink BWP, and the time domain resources used to transmit the data acknowledgment information corresponding to the PDSCH can be considered to include the time domain resources corresponding to the first activated uplink BWP. The uplink BWP may refer to an uplink BWP that is in an active state when the terminal feeds back data confirmation information. Furthermore, according to the time domain resources used for transmitting the data acknowledgement information corresponding to the PDSCH and the above-mentioned M kinds of time intervals, the obtained first time domain resources include: time domain resources corresponding to the first activated downlink BWP.

In some embodiments, the terminal and/or the network device determines the data confirmation information according to the time domain resources used for transmitting the data confirmation information corresponding to the PDSCH and M kinds of time intervals between the PDSCH and the data confirmation information. An implementation manner of the first time domain resource is:

For each of the M types of time intervals, if the time domain resource used to transmit the data acknowledgement information corresponding to the PDSCH is the nth time domain resource unit, and the M types of time intervals described in The Q-th time interval is K _1,Q time-domain resource units, and it is determined that the first time-domain resource includes the (nK _1,Q )-th time-domain resource unit.

Wherein, the first time domain resource includes M time domain resource units, and the Q is a positive integer less than or equal to M.

Since there are M types of time intervals, the nth time domain resource unit is subtracted from the M types of time intervals to obtain M different time domain resource units. If n is equal to 3 and M is equal to 3, that is, the nth time domain resource unit is the third time slot, that is, the third time slot, and the M types of time intervals may include: 1 time slot, 2 time slots, and 3 time slots, then obtain The first time domain resources of , are timeslot 0, timeslot 1, and timeslot 2, as shown in FIG. 7 .

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

In some embodiments, before executing S501, the terminal and/or the network device further executes the following steps:

The terminal and/or the network device, according to one PDSCH candidate position 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, from the one PDSCH Among the candidate locations, J types of valid PDSCH candidate locations are determined, where I is an integer greater than or equal to 1, and J is an integer less than or equal to 1. The first activated downlink BWP may refer to a downlink BWP in an activated state when the terminal feeds back data confirmation information. That is, the terminal and/or the network device of this embodiment determine PDSCH candidate positions that do not conflict with the uplink and downlink formats in each time domain resource unit from one PDSCH candidate position, and these determined PDSCH candidate positions are called effective. PDSCH candidate location. The uplink and downlink formats in each time-domain resource unit indicate the time-domain resources used for uplink transmission and the time-domain resources used for downlink transmission in each time-domain resource unit. If the domain resources overlap, it means that the PDSCH candidate position is not a valid PDSCH candidate position; otherwise, the PDSCH candidate position is a valid PDSCH candidate position.

Then, the terminal and/or the network device determine the first information according to the J types of valid PDSCH candidate positions. In this embodiment, each PDSCH candidate position has a corresponding relationship with the time interval. Therefore, after determining the J valid PDSCH candidate positions, the terminal and/or the network device determine the corresponding corresponding to the J valid PDSCH candidate positions. time interval, and then the time interval corresponding to the J valid PDSCH candidate positions is determined as the time interval between the PDSCH candidate position and the PDCCH candidate position.

Among them, the I kinds of PDSCH candidate positions configured in each time domain resource unit on the first activated downlink BWP and the corresponding time interval K ₀ are shown in Table 1. Wherein, in Table 1, the time-domain resource unit is taken as a time slot as an example, and the PDSCH candidate position is represented by a start symbol and a symbol length. The table 1 has, for example, 4 columns×1 rows. The contents of each column are the sequence number, the time interval K ₀ value, the start symbol and symbol length in each time slot, and the mapping type. The table 1 may be predefined, or may be configured by the network device to the terminal.

Table I

Wherein, Table 1 takes I equal to 4 as an example, wherein the K ₀ value, the start symbol and symbol length, and the mapping type of each row are all examples, and this embodiment is not limited thereto. K ₀ of each row is 0 (that is, the time interval is 0 time slots), and the mapping type can refer to the description in the prior art. The PDSCH candidate positions (ie start symbol and symbol length) in each time slot corresponding to the sequence numbers in Table 1 and the uplink and downlink formats in each time slot are shown in Figure 8. If the uplink and downlink formats represent each time slot The first 10 symbols (symbols 0-9) are used for downlink transmission, and the last 4 symbols (symbols 10-13) are used for uplink transmission. It can be known that the PDSCH candidate positions corresponding to the sequence numbers 0 and 1 conform to the uplink and downlink formats, and the PDSCH candidate positions corresponding to the sequence numbers 2 and 3 do not conform to the uplink and downlink formats. Then, the K ₀ values in the sequence number 0 and the sequence number 1 are both determined as the time interval between the time domain resource of the PDSCH candidate position and the time domain resource of the PDCCH candidate position.

In some embodiments, the first time domain resources include R sub-time domain resources, and the time intervals indicated by the first information are T types. An implementation manner of the foregoing S501 may include:

For each sub-time domain resource in the R sub-time domain resources and each time interval in the T kinds of time intervals, if the H th sub-time domain resource in the R sub-time domain resources is located at the m _v th time In the domain resource unit, and the S th time interval in the T time intervals is K _0,S , the terminal determines that the second time domain resource includes the (m _v -K _0,S )th time domain Resource unit; wherein, the H is a positive integer less than or equal to R, the S is a positive integer less than or equal to T, and the v is a positive integer.

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

Taking the time domain resource unit as a time slot as an example below, the first time domain resource includes time slot 0, time slot 1, and time slot 2. According to the valid PDSCH candidate positions in each time slot, for example, in combination with Table 1 and Figure 8 It can be seen that symbols 3-symbol 7 in slot 0 are sub-time domain resources, symbols 5-symbol 9 in slot 0 are sub-time domain resources, and symbols 3-symbol 7 in slot 1 are sub-time domain resources , symbols 5-symbol 9 in slot 1 are sub-time domain resources, symbols 3-symbol 7 in slot 2 are sub-time domain resources, and symbols 5-symbol 9 in slot 2 are sub-time domain resources, so , the first time domain resource includes 6 sub-time domain resources. Among them, the first sub-time domain resource is that the symbol 3-symbol 7 in the time slot 0 are located in the time slot 0. Since the time interval is 0 time slots, the time slot (0-0) can be determined, that is, the time slot 0; The second sub-time domain resource is that symbol 5-symbol 9 in slot 0 are located in slot 0. Since the time interval is all 0 slots, the slot (0-0) can be determined, that is, slot 0; the third The sub-time domain resources are the symbols 3-symbol 7 in the time slot 1 located in the time slot 1. Since the time intervals are all 0 time slots, the time slot (1-0) can be determined, that is, the time slot 1; the fourth sub-time The domain resource is the symbol 5-symbol 9 in the time slot 1. Since the time interval is all 0 time slots, the time slot (1-0) can be determined, that is, the time slot 1; the fifth sub-time domain resource The symbol 3-symbol 7 in the time slot 2 are located in the time slot 2. Since the time intervals are all 0 time slots, the time slot (2-0) can be determined, that is, the time slot 2; the sixth sub-time domain resource is time Symbol 5-symbol 9 in slot 2 are located in slot 2. Since the time intervals are all 0 time slots, time slot (2-0) can be determined, that is, slot 2. Therefore, it is possible to obtain the second time domain resource including time slot 0-slot 2. After determining the second time domain resource, the terminal and/or the network device searches for a PDCCH listening opportunity on the at least one downlink BWP within a time range corresponding to time slot 0 to time slot 2.

Optionally, after the terminal and/or the network device performs the above S502, if within the time range corresponding to the (m _v -K _0,S )th time domain resource unit in the second time domain resource, the at least one If the PDCCH listening opportunity is found on the downlink BWP, the terminal and/or the network device determine that the Hth sub-time domain resource in the R sub-time domain resources is a valid PDSCH candidate position. If a PDCCH listening opportunity is found on the at least one downlink BWP within the time range of time slot 0 and time slot 2 in the second time domain resource, the first time slot corresponding to time slot 0 in the second time domain resource 1 sub-time domain resource and the 2nd sub-time domain resource are valid PDSCH candidate positions, and the 5th sub-time domain resource and the 6th sub-time domain resource corresponding to slot 2 in the second time domain resource are valid PDSCH candidate location.

Optionally, after the terminal and/or the network device performs the above S502, if within the time range corresponding to the (m _v -K _0,S )th time domain resource unit in the second time domain resource, the at least one If no PDCCH listening opportunity is found on the downlink BWP, the terminal and/or the network device determine that the Hth sub-time domain resource in the R sub-time domain resources is not a valid PDSCH candidate position. If no PDCCH listening opportunity is found on the at least one downlink BWP within the time range of time slot 1 in the second time domain resource, the third sub-time corresponding to time slot 1 in the second time domain resource The domain resource and the 4th sub-time domain resource are not valid PDSCH candidate locations.

Wherein, the valid PDSCH candidate position means that when the semi-static data acknowledgement information (HARQ-ACK) codebook is determined, the PDSCH candidate position needs to be taken into consideration in subsequent possible procedures. For example, through the embodiments described in this application, it is finally determined that there are A valid PDSCH candidate positions, then the terminal needs to feed back data confirmation information corresponding to A PDSCH at most to the network device, and the network device needs to receive A PDSCH corresponding to the terminal from the terminal. data confirmation information. When determining the semi-static HARQ-ACK codebook, after using the embodiments described in this application, there may be other methods, which can further filter out B valid PDSCH candidate positions (B is less than or equal to A) For PDSCH candidate positions, the terminal needs to feed back data confirmation information corresponding to B PDSCHs to the network device, and the network device needs to receive data confirmation information corresponding to B PDSCHs from the terminal.

The solution of the present application will be described below with several specific embodiments. In the following, the terminal is the UE, the time-frequency resource unit is the time slot, the time interval between the PDSCH candidate position and the PDCCH candidate position is K0, and the time interval between the time domain resource used to transmit the data acknowledgment information corresponding to the PDSCH and the PDSCH is K1. , the data acknowledgment information is HARQ-ACK information, which is described. Valid PDSCH candidate positions may be referred to as PDSCH valid positions, and valid PDSCH candidate positions may be referred to as valid PDSCH transmission positions.

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

In any one of time slot 0, time slot 1 and time slot 2, the UE will obtain an effective PDSCH transmission position according to the prior art, that is, the position corresponding to the sequence number 0 and the sequence number 1. Then, in any one of time slot 0, time slot 1 and time slot 2, according to the K0 value corresponding to sequence number 0 and sequence number 1, check whether there is a PDCCH listening opportunity.

In this embodiment, the UE will check whether there is a PDCCH listening opportunity on all configured downlink BWPs/any one of the configured downlink BWPs. In time slot 0 and time slot 2, there is a PDCCH monitoring opportunity on BWP2, In slot 1, there is a PDCCH listening opportunity on BWP1. Therefore, after screening, in the three time slots from time slot 0 to time slot 2, there are altogether 6 valid positions of the PDSCH. These positions need to be taken into account in the subsequent determination of the semi-static codebook.

Therefore, this embodiment can solve the problem of errors in the semi-static codebook during BWP switching.

In the second embodiment, the scenario of this embodiment is exactly the same as that of the first embodiment, the difference is that in this embodiment, the UE will check on all downlink BWPs in the active state/downlink BWP in any active state. Whether there is a PDCCH monitoring opportunity. In time slot 0 and time slot 2, when BWP2 is active, there is a PDCCH monitoring opportunity; in time slot 1, both BWP1 and BWP2 are active for a period of time, and there is PDCCH monitoring on BWP1. Chance. Therefore, after screening, in the three time slots of time slots 0 to 2, there are altogether 6 valid positions of the PDSCH. These positions need to be taken into account in the subsequent determination of the semi-static codebook.

Therefore, this embodiment can solve the problem of errors in the semi-static codebook during BWP switching.

In the third embodiment, the difference between this embodiment and the first embodiment is that when the BWP is switched, the PDCCH and PDSCH are not in the same time slot, and the time domain resource allocation table is shown in Table 2. In Table 2 The value of K0 is different from that in Table 1, and other configurations (such as the starting position and length of the symbol, the actual time slot structure, etc.) are the same as those in Table 1. Wherein, K0 and SLIV in Table 2 are only examples and are not limited thereto.

Table II

Same as the first embodiment, in time slot 1 to time slot 3, the UE will exclude the PDSCH candidate positions corresponding to sequence number 2 and sequence number 3 according to the method in the prior art (due to the actual time slot structure (that is, the above-mentioned The upstream and downstream formats) have upstream and downstream conflicts). Then, in any one of time slot 1, time slot 2 and time slot 3, according to the K0 value corresponding to sequence number 0 and sequence number 1, check whether there is a PDCCH listening opportunity.

In this embodiment, the UE will check whether there is a PDCCH listening opportunity on all configured downlink BWPs/any one configured downlink BWP. In time slot 1 and time slot 3, when K0=0, in BWP2 There is a PDCCH listening opportunity. In time slot 2, when K0=2, there is a PDCCH listening opportunity on BWP1, as shown in FIG. 10 . Therefore, after screening, in the three time slots from time slot 1 to time slot 3, there are altogether 6 valid positions of PDSCH. These positions need to be taken into account in the subsequent determination of the semi-static codebook.

Therefore, this embodiment can solve the problem of errors in the semi-static codebook during BWP switching.

In the fourth embodiment, the scenario of this embodiment is exactly the same as that of the third embodiment, the difference is that in this embodiment, the UE will check on all downlink BWPs in the active state/downlink BWPs in any active state. Whether there is a PDCCH monitoring opportunity, in time slot 3, when BWP2 is active, there is a PDCCH monitoring opportunity; in time slot 0 to time slot 2, BWP1 and BWP2 are in active state for a period of time respectively, and both on BWP1 or BWP2 There is a corresponding PDCCH listening opportunity. Therefore, after screening, in the three time slots of time slots 1 to 3, there are altogether 6 valid positions of the PDSCH. These positions need to be taken into account in the subsequent determination of the semi-static codebook.

Therefore, this embodiment can solve the problem of errors in the semi-static codebook during BWP switching.

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

In this embodiment, the UE will check whether there is a PDCCH listening opportunity on all configured downlink BWPs/any configured downlink BWP, or all active downlink BWPs/any active downlink BWP . In time slot 1, when calculating the position of K0=0, time slot 1 on BWP2 and the two time slots (time slot c and time slot d) on BWP1 corresponding to this time slot should be taken into account. That is, it is necessary to check whether there is a PDCCH listening opportunity on a total of 3 slot-BWP-pairs (slot-BWP-pair). As shown in Figure 11, there is a PDCCH listening opportunity on time slot c of BWP1, so there is a valid PDSCH position in time slot 1, which needs to be taken into account in the subsequent process of determining the semi-static codebook.

Therefore, this embodiment can solve the problem of errors in the semi-static codebook during BWP switching.

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

In this embodiment, the UE searches all configured downlink BWPs/any configured downlink BWP, or all active downlink BWPs/any active downlink BWP to check whether there is a PDCCH listening opportunity . In time slot 2, when calculating the position of K0=0, time slot 1 on BWP2 and time slot b on BWP1 corresponding to this time slot should be taken into account. That is, it is necessary to check whether there is a PDCCH listening opportunity on a total of 2 slot-BWP-pairs (slot-BWP-pair). As shown in Figure 12, there is a PDCCH listening opportunity on time slot b of BWP1, so there is a valid PDSCH position in time slot 1, which needs to be taken into account in the subsequent process of determining the semi-static codebook.

Therefore, this embodiment can solve the problem of errors in the semi-static codebook during BWP switching.

It should be noted that, the above-mentioned first to sixth embodiments may also be executed by a network device.

It can be understood that, in the above embodiments, the methods or steps implemented by the terminal may also be implemented by components (such as chips or circuits) that can be used in the terminal, and the methods or steps implemented by the network device may also be implemented by the terminal. A component (eg, a chip or circuit, etc.) of a network device is implemented.

FIG. 13 is a schematic structural diagram of a communication device provided by an embodiment of the application. The communication device may be a terminal or a chip that can be used for a terminal. As shown in FIG. 13 , the communication device of this embodiment may include: a determination module 1301 and lookup module 1302. Optionally, the communication apparatus in this embodiment may further include a receiving module 1303 .

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

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

Wherein, the at least one downlink BWP includes: all downlink BWPs configured by the network device to the terminal, or the at least one downlink BWP includes: configured by the network device to the terminal and within the time range corresponding to the second time domain resource All downstream BWPs that have been activated in the past.

In some embodiments, the searching module 1302 is specifically configured to: in the time domain resources on each downlink BWP in the at least one downlink BWP corresponding to the second time domain resource, on each downlink BWP Look for PDCCH listening opportunities.

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 according to the time domain resources used to transmit the data acknowledgement information corresponding to the PDSCH and M types of time intervals between the PDSCH and the data acknowledgement information. Domain resource, M is an integer greater than or equal to 1;

The determined first time domain resources include: time domain resources corresponding to the first activated downlink BWP.

In some embodiments, the determining module 1301 is specifically configured to: for each of the M kinds of time intervals, if the time domain resource used for transmitting the data acknowledgement information corresponding to the PDSCH is the first time interval n time domain resource units, and the Qth time interval among the M time intervals is K _1,Q time domain resource units, then it is determined that the first time domain resource includes the (nK _1,Q )th time domain resource unit. Wherein, the first time domain resource includes M time domain resource units, and the Q is a positive integer less than or equal to M.

In some embodiments, the determining module 1301 is further configured to, before determining the second time domain resource according to the first time domain resource and the first information, according to each time domain resource unit on the first activated downlink BWP I kinds of PDSCH candidate positions configured in , and the uplink and downlink formats in each time-domain resource unit, determine J kinds of valid PDSCH candidate positions from the I kinds of PDSCH candidate positions, and the I is greater than or equal to 1 an integer, the J is an integer less than or equal to 1; and the first information is determined according to the J types of valid 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 types, and the R and the T are positive integers. The determining module 1301 is specifically configured to: for each sub-time domain resource in the R sub-time domain resources and each time interval in the T types of time intervals, if the first sub-time domain resource in the R sub-time domain resources The H sub-time domain resources are located in the m _vth time domain resource unit, and the Sth time interval in the T time intervals is K _0,S , then it is determined that the second time domain resource includes the (m _v − K _0,S ) time domain resource unit. The H is a positive integer less than or equal to R, the S is a positive integer less than or equal to T, and the v is a positive integer.

In some embodiments, the determining module 1301 is further configured to search for the PDCCH listening opportunity on at least one downlink BWP within the time range corresponding to the second time domain resource by the searching module 1302, if the If no PDCCH listening opportunity is found on the at least one downlink BWP within the time range corresponding to the (m _v -K _0,S )th time domain resource unit in the second time domain resource, then determine the R sub-time domains The Hth sub-time domain resource in the resource is not a valid PDSCH candidate position.

In some embodiments, the determining module 1301 is further configured to search for the PDCCH listening opportunity on at least one downlink BWP within the time range corresponding to the second time domain resource by the searching module 1302, if the Within the time range corresponding to the (m _v -K _0,S ) time domain resource unit in the second time domain resource, a PDCCH listening opportunity is found on the at least one downlink BWP, then the R sub-time domain resources are determined The H-th sub-time domain resource is a valid PDSCH candidate position.

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

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

The communication device described above in this embodiment can be used to execute the technical solutions performed by the terminal in the corresponding method embodiments above, and its implementation principle and technical effect are similar, and the functions of each module can refer to the corresponding descriptions in the method embodiments. It will not be repeated here.

FIG. 14 is a schematic structural diagram of a communication device provided by another embodiment of the present application. The communication device may be a network device or a chip that can be used in a network device. As shown in FIG. 14 , the communication device in this embodiment may include : determination module 1401 and search module 1402 . Optionally, the communication apparatus in this embodiment may further include a sending module 1403 .

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

The searching module 1402 is configured to search for a PDCCH listening opportunity on at least one downlink BWP within a time range corresponding to the second time domain resource.

Wherein, the at least one downlink BWP includes: all downlink BWPs configured by the network device to the terminal, or the at least one downlink BWP includes: configured by the network device to the terminal and within the time range corresponding to the second time domain resource All downstream BWPs that have been activated in the past.

In some embodiments, the searching module 1402 is specifically configured to: in the time domain resources on each downlink BWP in the at least one downlink BWP corresponding to the second time domain resource, on each downlink BWP Look for PDCCH listening opportunities.

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 according to the time domain resources used to transmit the data acknowledgement information corresponding to the PDSCH and M types of time intervals between the PDSCH and the data acknowledgement information. Domain resource, M is an integer greater than or equal to 1;

The determined first time domain resources include: time domain resources corresponding to the first activated downlink BWP.

In some embodiments, the determining module 1401 is specifically configured to: for each of the M types of time intervals, if the time domain resource used for transmitting the data acknowledgement information corresponding to the PDSCH is the first time interval n time domain resource units, and the Qth time interval among the M time intervals is K _1,Q time domain resource units, then it is determined that the first time domain resource includes the (nK _1,Q )th time domain resource unit. Wherein, the first time domain resource includes M time domain resource units, and the 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, according to each time domain resource unit on the first activated downlink BWP I kinds of PDSCH candidate positions configured in , and the uplink and downlink formats in each time-domain resource unit, determine J kinds of valid PDSCH candidate positions from the I kinds of PDSCH candidate positions, and the I is greater than or equal to 1 an integer, the J is an integer less than or equal to 1; and the first information is determined according to the J types of valid 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 types, and the R and the T are positive integers. The determining module 1401 is specifically configured to: for each sub-time domain resource in the R sub-time domain resources and each time interval in the T types of time intervals, if the first sub-time domain resource in the R sub-time domain resources The H sub-time domain resources are located in the m _vth time domain resource unit, and the Sth time interval in the T time intervals is K _0,S , then it is determined that the second time domain resource includes the (m _v − K _0,S ) time domain resource unit. The H is a positive integer less than or equal to R, the S is a positive integer less than or equal to T, and the v is a positive integer.

In some embodiments, the determining module 1401 is further configured to search for the PDCCH listening opportunity on at least one downlink BWP within the time range corresponding to the second time domain resource by the searching module 1402, if the If no PDCCH listening opportunity is found on the at least one downlink BWP within the time range corresponding to the (m _v -K _0,S )th time domain resource unit in the second time domain resource, then determine the R sub-time domains The Hth sub-time domain resource in the resource is not a valid PDSCH candidate position.

In some embodiments, the determining module 1401 is further configured to search for the PDCCH listening opportunity on at least one downlink BWP within the time range corresponding to the second time domain resource by the searching module 1402, if the Within the time range corresponding to the (m _v -K _0,S ) time domain resource unit in the second time domain resource, a PDCCH listening opportunity is found on the at least one downlink BWP, then the R sub-time domain resources are determined The H-th sub-time domain resource is a valid PDSCH candidate position.

In some embodiments, the sub-time domain resource is at least two consecutive symbols 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 can be used to implement the technical solutions performed by the network equipment in the corresponding method embodiments above, and the implementation principles and technical effects thereof are similar, and the functions of each module may refer to the corresponding descriptions in the method embodiments. , and will not be repeated here.

FIG. 15 is a schematic structural diagram of a communication apparatus provided by another embodiment of the present application. As shown in FIG. 15 , the communication apparatus in this embodiment may include: a memory 1501 and a processor 1502 . Optionally, the communication apparatus in this embodiment may further include a transceiver 1503 .

In an implementation manner, the communication device may be a terminal, or may be a chip that can be used for a terminal. The above-mentioned determination module 1301 and search module 1302 may be embedded in the processor 1502 in the form of hardware. Optionally, the aforementioned receiving module 1303 may also be embedded in the processor 1502 in the form of hardware.

Optionally, the aforementioned receiving module 1303 may also be embedded in the transceiver 1503 in the form of hardware.

Among them, the memory 1501 is used for storing program instructions. When the program instructions are called, the processor 1502 is configured to execute the above-mentioned solution executed by the terminal.

In another implementation manner, the communication apparatus may be a network device, or may be a chip that can be used for a network device. The above-mentioned determination module 1401 and search module 1402 may be embedded in the processor 1502 in the form of hardware. Optionally, the above-mentioned sending module 1403 may also be embedded in the processor 1502 in the form of hardware.

Optionally, the above-mentioned sending module 1403 may also be embedded in the transceiver 1503 in the form of hardware.

Among them, the memory 1501 is used for storing program instructions. When the program instructions are invoked, the processor 1502 is configured to execute the solution executed by the above-mentioned network device.

The program instructions can be implemented in the form of software functional units and can be sold or used as an independent product, and the memory 1501 can be any form of computer-readable storage medium. Based on this understanding, all or part of the technical solutions of the present application may be embodied in the form of software products, including several instructions to enable a computer device, specifically the processor 1502, to execute the various embodiments of the present application. all or part of the steps. The aforementioned computer-readable storage medium includes: U disk, removable hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disks or optical disks, etc. medium of code.

It should be noted that, the division of modules in the embodiments of the present application is schematic, and is only a logical function division, and there may be other division manners 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 physically alone, or two or more modules may be integrated into one module. The above-mentioned integrated modules can be implemented in the form of hardware, and can also be implemented in the form of software function modules.

If the integrated modules are implemented in the form of software functional modules and sold or used as independent products, they may be stored in a computer-readable storage medium. Based on this understanding, the technical solutions of the present application can be embodied in the form of software products in essence, or the parts that contribute to the prior art, or all or part of the technical solutions, and the computer software products are stored in a storage medium , including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk, and other media that can store program codes.

In the above-mentioned embodiments, it may be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented in software, it can 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 the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer may be a general purpose computer, special purpose computer, computer network, or other programmable device. The computer instructions may be stored in or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be downloaded from a website site, computer, server or data center Transmission to another website site, computer, server, or data center is by wire (eg, coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (eg, infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that includes an integration of one or more available media. The usable media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media (eg, DVD), or semiconductor media (eg, Solid State Disk (SSD)), among others.

Claims (18)

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;

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.

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;

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

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;

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

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;

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.

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;

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.

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;

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

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;

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

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;

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.

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.

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