CN116349189A

CN116349189A - Communication method and device

Info

Publication number: CN116349189A
Application number: CN202180068112.9A
Authority: CN
Inventors: 焦淑蓉; 托斯顿·斯科尔; 雷纳·巴希尔; 李军
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-10-16
Filing date: 2021-04-02
Publication date: 2023-06-27
Also published as: WO2022077876A1; WO2022077514A1

Abstract

The embodiment of the application provides a communication method and device, under the condition that a time-frequency resource of a DMRS used for bearing a PDSCH overlaps with a time-frequency resource of a CORESET, a terminal determines a backward movement distance of the DMRS, determines a first time parameter d3 according to at least one of the backward movement distance of the DMRS and the duration of the PDSCH, and determines a processing time T according to the first time parameter d 3. And transmitting HARQ feedback information to the network equipment under the condition that the first symbol of the PUCCH is not earlier than the earliest feedback symbol, wherein the earliest feedback symbol is a symbol determined according to the last symbol of the PDSCH and the processing time T. By adopting the method and the device of the embodiment of the application, the processing time T is increased to a certain extent by introducing the new first time parameter d3, so that sufficient PDSCH processing time is provided for the terminal before the HARQ feedback information is sent, and the HARQ feedback information can be normally sent.

Description

Communication method and device

Cross Reference to Related Applications

The present application claims priority from the chinese patent office, application number PCT/CN2020/121698, application name "a communication method and apparatus", filed on day 16 of 10 in 2020, the entire contents of which are incorporated herein by reference.

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to a communications method and apparatus.

Background

Fifth generation (5) ^th generation, 5G) New Radio (NR) systems in mobile communication systems, in order to reduce the complexity of channel estimation, existing protocols provide for: the demodulation reference signal (demodulation reference signal, DMRS) of PDSCH and the resources of the control-resource set (CORESET) cannot overlap. When the DMRS symbol of PDSCH overlaps with the CORESET symbol, the DMRS symbol needs to be shifted backward. Since the terminal must perform channel estimation after receiving the DMRS, it can then demodulate and decode the PDSCH according to the channel estimation result. Since the back-shifting of DMRS symbols shortens the processing time available to the terminal for PDSCH, it is likely that the terminal will not be able to demodulate and decode PDSCH, resulting in failure to normally transmit hybrid automatic repeat request (hybrid automatic repeat request, HARQ) feedback information.

Disclosure of Invention

The application provides a communication method and a communication device, which are used for avoiding that HARQ feedback information cannot be normally sent due to symbol backward movement of a DMRS.

In a first aspect, a communication method is provided, which may be performed by a terminal or by a module in the terminal, the method comprising: a terminal receives Downlink Control Information (DCI) from network equipment, wherein the DCI comprises a hybrid automatic repeat request (HARQ) feedback timing indication field, and the HARQ feedback timing indication field indicates a time unit of an interval between a Physical Uplink Control Channel (PUCCH) and a Physical Downlink Shared Channel (PDSCH) scheduled by the DCI, wherein the PUCCH is used for bearing the HARQ feedback information of the PDSCH; the terminal determines the backward moving distance of the DMRS under the condition that the time-frequency resource of the demodulation reference signal DMRS used for bearing the PDSCH is overlapped with the time-frequency resource of the control resource set CORESET; the terminal determines a first time parameter d3 according to at least one of the backward movement distance of the DMRS and the duration time of the PDSCH; the terminal determines processing time T according to the first time parameter d3, wherein the processing time T comprises the time required by the terminal for generating corresponding HARQ feedback information from the reception of the PDSCH; and the terminal sends HARQ feedback information to the network equipment under the condition that the first symbol of the PUCCH is not earlier than the earliest feedback symbol, wherein the earliest feedback symbol is a symbol determined according to the last symbol of the PDSCH and the processing time T, and the HARQ feedback information is determined according to the decoding result of the PDSCH.

The time-frequency resource of the DMRS overlaps with the time-frequency resource of CORESET, which may specifically mean that the time-frequency resource of the pre-loaded DMRS overlaps with the time-frequency resource of CORESET. The overlapping may refer to full overlapping, or partial overlapping, without limitation. In the method, the duration of the processing time T can be increased to a certain extent by introducing the new first time parameter d3, so that sufficient PDSCH processing time is provided for the terminal before the HARQ feedback information is sent, and the HARQ feedback information can be normally sent.

Optionally, the terminal does not send the HARQ feedback information or sends a negative acknowledgement NACK on the condition that the first symbol of the PUCCH is earlier than the earliest feedback symbol.

The terminal device may also directly discard DCI for scheduling PDSCH under the above conditions.

In one possible design, the value of the first time parameter d3 is 0 on the condition that the duration of the PDSCH is less than or equal to a duration threshold.

By the method, when the duration of the PDSCH is smaller, the DMRS cannot be moved out of the range of the PDSCH no matter how backward movement is possible, at this time, the backward movement distance of the DMRS is also smaller, and the influence caused by the backward movement of the DMRS is also smaller, at this time, the processing time T can be calculated by setting the first time parameter d3 to 0, that is, without introducing new time parameters, and continuing to use the original mode.

In one possible design, the first time parameter d3 is determined according to the backward distance of the DMRS under the condition that the duration of the PDSCH is greater than the duration threshold or when the duration of the PDSCH is a value in a preset set.

Optionally, the value of the first time parameter d3 is equal to the backward movement distance of the DMRS.

Optionally, the terminal determines a first value set from a plurality of value sets according to the backward movement distance of the DMRS; and determining the first time parameter d3 according to the first numerical value set.

In one possible design, the value of the first time parameter d3 is equal to the first value in the first set of values according to a pre-configured condition.

In one possible design, the preset set includes N values, where N is a positive integer, and N is less than or equal to the total number of values of PDSCH duration specified by the protocol; or, the values in the preset set all meet less than or equal to a second duration threshold.

In one possible design, the processing time T satisfies the following condition:

T _proc,1 ＝(N ₁ +d _1,1 +d ₂ +d ₃ )(2048+144)·κ2 ^-μ ·T _C +T _ext

wherein the T is _proc,1 Representing the processing time T, N ₁ Represents a processing time of a PDSCH determined according to a subcarrier spacing, a processing capability of the terminal, and whether or not an additional DMRS is configured, the d ₁₁ Represents a relaxation time introduced by considering the overlap of the physical downlink control channel PDCCH and PDSCH, said d ₂ Representing parameters introduced by considering different priority uplink channel overlaps, said d ₃ Representing the first time parameter, the T _C Representing time units, said T _ext Taking 1 in the operation of shared spectrum channel access, taking 0 in the rest of the scenes, wherein kappa is a constant 64, and u indicates subcarrier spacing.

In another possible design, the processing time T satisfies the following condition:

T _proc,1 ＝(N ₁ +max(d _1,1 ,d ₃ )+d ₂ )(2048+144)·κ2 ^-μ ·T _C +T _ext

wherein the T is _proc,1 Representing the processing time T, N ₁ Represents a processing time of a PDSCH determined according to a subcarrier spacing, a processing capability of the terminal, and whether or not an additional DMRS is configured, the d ₁₁ Represents the relaxation time introduced by considering the overlap of PDCCH and PDSCH, said d ₂ Representing parameters introduced by considering different priority uplink channel overlaps, said d ₃ Representing the first time parameter, the T _C Representing time units, said T _ext Taking 1 in the operation of shared spectrum channel access, the rest of the scenario takes 0, and κ is denoted as a constant 64, where u indicates the subcarrier spacing.

By the above, mainly considering the influence that d11 is not zero, the values of d11 and d3 are integrated, and the overlarge setting of the value of the processing time T can be avoided, so that the communication time delay is reduced.

In a second aspect, a communication method is provided, which may be performed by a terminal or by a module in the terminal, the method comprising: a terminal receives Downlink Control Information (DCI) from network equipment, wherein the DCI comprises a hybrid automatic repeat request (HARQ) feedback timing indication field, and the HARQ feedback timing indication field indicates a time unit of an interval between a Physical Uplink Control Channel (PUCCH) and a Physical Downlink Shared Channel (PDSCH) scheduled by the DCI, wherein the PUCCH is used for bearing the HARQ feedback information of the PDSCH; a terminal determines a processing time T according to a parameter of a processing capability 1 under the condition that a time-frequency resource used for bearing a demodulation reference signal DMRS of the PDSCH overlaps with a time-frequency resource of a control resource set CORESET, and the terminal supports the processing capability 2 and the processing capability 2 is enabled, wherein the processing time T comprises a time required by the terminal to generate corresponding HARQ feedback information from the reception of the PDSCH, and the processing time T2 determined according to the processing capability 2 is smaller than the processing time T under the condition of the same subcarrier interval and the same DMRS configuration; and the terminal sends HARQ feedback information to the network equipment under the condition that the first symbol of the PUCCH is not earlier than the earliest feedback symbol, wherein the earliest feedback symbol is a symbol determined according to the last symbol of the PDSCH and the processing time T, and the HARQ feedback information is determined according to the decoding result of the PDSCH.

By the method, the processing time of the PDSCH of the terminal with processing capability 2 is shorter, and when the DMRS is backwardly moved, the DMRS is more influenced, so that the generated problem is more remarkable. Therefore, in the embodiment of the present application, after the DMRS is shifted back, the terminal is retracted to the processing capability 1 to determine the processing time of the PDSCH, so that the processing time of the PDSCH can be increased to a certain extent, and the HARQ feedback information can be normally sent.

In one possible design, the terminal supports the processing capability 2 and the processing capability 2 is enabled, the DMRS being a preloaded DMRS; and under the condition that the backward position of the pre-loaded DMRS is equal to or later than the position of the original additional DMRS specified by a protocol, determining the processing time T according to the parameters in the processing capacity 1 when the additional DMRS is configured.

In a third aspect, a communication method is provided, which may be performed by a network device or by a module in the network device, the method comprising: the method comprises the steps that a network device receives capability information from a terminal, wherein the capability information indicates the capability of the terminal for supporting or not supporting the backward shift of a demodulation reference signal (DMRS) symbol of a Physical Downlink Shared Channel (PDSCH); and the network equipment schedules the PDSCH according to the capability information, wherein when the terminal does not support the capability of the DMRS symbol backward movement of the PDSCH, the time-frequency resource of the DMRS for bearing the PDSCH is not overlapped with the time-frequency resource of a control resource set COESET.

By the method, the network equipment can perform adaptive scheduling aiming at the terminals with different capabilities according to the capability distinction of the terminals, so that the overall efficiency of the network is ensured.

In a fourth aspect, a communication method is provided, which is executed by a terminal, and may also be executed by a module in the terminal, including: the method comprises the steps that a terminal sends capability information to network equipment, wherein the capability information indicates the capability of the terminal for supporting or not supporting the backward shift of a demodulation reference signal (DMRS) symbol of a Physical Downlink Shared Channel (PDSCH); and the terminal receives downlink control information DCI from the network equipment, wherein the DCI is used for scheduling the PDSCH, and the time-frequency resources of the DMRS of the PDSCH are not overlapped with the time-frequency resources of a control resource set CORESET under the condition that the terminal does not support the capability of backward movement of the DMRS symbols of the PDSCH.

Optionally, under the condition that the terminal does not support the capability of DMRS symbol backward shift of PDSCH, and the time-frequency resource of DMRS of PDSCH overlaps with the time-frequency resource of CORESET, the PDSCH is not received.

In a fifth aspect, a communication device is provided, and advantageous effects can be seen from the description of the first aspect. The communication device has the function of implementing the behavior of the method embodiments of the first aspect described above. The functions may be performed by executing corresponding software. The hardware or software includes one or more modules corresponding to the functions described above. In one possible design, the communication device includes: a transceiver module, configured to receive downlink control information DCI from a network device, where the DCI includes a hybrid automatic repeat request HARQ feedback timing indication field, where the HARQ feedback timing indication field indicates a time unit of an interval between a physical uplink control channel PUCCH and a physical downlink shared channel PDSCH scheduled by the DCI, where the PUCCH is used to carry HARQ feedback information of the PDSCH; a processing module, configured to determine a backward movement distance of a DMRS under a condition that a time-frequency resource for carrying a demodulation reference signal DMRS of the PDSCH overlaps with a time-frequency resource of a control resource set CORESET, determine a first time parameter d3 according to at least one of the backward movement distance of the DMRS and a duration of the PDSCH, and determine a processing time T according to the first time parameter d3, where the processing time T includes a time required for the terminal to generate corresponding HARQ feedback information from reception of the PDSCH; and the receiving and transmitting module is further configured to send HARQ feedback information to the network device under a condition that a first symbol of the PUCCH is not earlier than an earliest feedback symbol, where the earliest feedback symbol is a symbol determined according to a last symbol of the PDSCH and the processing time T, and the HARQ feedback information is determined according to a decoding result of the PDSCH. These modules may perform the corresponding functions in the method examples of the first aspect, which are specifically referred to in the detailed description of the method examples and are not described herein.

In a sixth aspect, there is provided a communication device, the advantageous effects of which can be seen from the description of the second aspect. The communication device has the function of implementing the behavior of the method embodiments of the second aspect described above. The functions may be performed by executing corresponding software. The hardware or software includes one or more modules corresponding to the functions described above. In one possible design, the communication device includes: a transceiver module, configured to receive downlink control information DCI from a network device, where the DCI includes a hybrid automatic repeat request HARQ feedback timing indication field, where the HARQ feedback timing indication field indicates a time unit of an interval between a physical uplink control channel PUCCH and a physical downlink shared channel PDSCH scheduled by the DCI, where the PUCCH is used to carry HARQ feedback information of the PDSCH; a processing module, configured to determine a processing time T according to a parameter of a processing capability 1 under a condition that a time-frequency resource for carrying a demodulation reference signal DMRS of the PDSCH overlaps with a time-frequency resource of a control resource set CORESET, and the terminal supports the processing capability 2 and the processing capability 2 is enabled, where the processing time T includes a time required for the terminal to generate corresponding HARQ feedback information from reception of the PDSCH, and under the same subcarrier interval and DMRS configuration, the processing time T2 determined according to the processing capability 2 is smaller than the processing time T; and the receiving and transmitting module is further configured to send HARQ feedback information to the network device under a condition that a first symbol of the PUCCH is not earlier than an earliest feedback symbol, where the earliest feedback symbol is a symbol determined according to a last symbol of the PDSCH and the processing time T, and the HARQ feedback information is determined according to a decoding result of the PDSCH. These modules may perform the corresponding functions in the method examples of the second aspect, which are specifically referred to in the method examples and are not described herein.

A seventh aspect provides a communication device, and advantageous effects can be seen from the description of the third aspect. The communication device has the function of implementing the behavior of the method embodiments of the third aspect described above. The functions may be performed by executing corresponding software. The hardware or software includes one or more modules corresponding to the functions described above. In one possible design, the communication device includes: the receiving and transmitting module is used for receiving capability information from a terminal, wherein the capability information indicates the capability of the terminal for supporting or not supporting the backward shift of a demodulation reference signal (DMRS) symbol of a Physical Downlink Shared Channel (PDSCH); and the processing module is used for scheduling the PDSCH according to the capability information, wherein when the terminal does not support the capability of the DMRS symbol backward movement of the PDSCH, the time-frequency resource used for bearing the DMRS of the PDSCH is not overlapped with the time-frequency resource of the control resource set CORESET. These modules may perform the corresponding functions in the method examples of the third aspect, which are specifically referred to in the method examples and are not described herein.

An eighth aspect provides a communication device, and advantageous effects can be seen in the fourth aspect. The communication device has the function of implementing the behavior of the method embodiment of the fourth aspect described above. The functions may be performed by executing corresponding software. The hardware or software includes one or more modules corresponding to the functions described above. In one possible design, the communication device includes: a transceiver module, configured to send capability information to a network device, where the capability information indicates a capability of the terminal to support or not support a demodulation reference signal DMRS symbol of a physical downlink shared channel PDSCH to be moved backward; and the receiving and transmitting module is further configured to receive downlink control information DCI from the network device, where the DCI is used to schedule the PDSCH, and under a condition that the terminal does not support the capability of DMRS symbol backward movement of the PDSCH, time-frequency resources of the DMRS of the PDSCH do not overlap with time-frequency resources of a control resource set CORESET. These modules may perform the corresponding functions in the method example of the fourth aspect, which are specifically referred to in the method example and are not described herein.

In a ninth aspect, a communication device is provided, which may be a terminal in an embodiment of the method described above, or a chip provided in the terminal. The communication device comprises a communication interface and a processor, and optionally a memory. The memory is used for storing a computer program or instructions, and the processor is coupled with the memory and the communication interface, when the processor executes the computer program or instructions, the communication device is caused to execute the method executed by the terminal in the method embodiment.

In a tenth aspect, a communication apparatus is provided, where the communication apparatus may be a network device in the above method embodiment, or a chip provided in the network device. The communication device comprises a communication interface and a processor, and optionally a memory. The memory is used for storing a computer program or instructions, and the processor is coupled with the memory and the communication interface, when the processor executes the computer program or instructions, the communication device executes the method executed by the network device in the method embodiment.

In an eleventh aspect, there is provided a computer program product comprising: computer program code which, when executed, causes the method performed by the terminal in the above aspects to be performed.

In a twelfth aspect, there is provided a computer program product comprising: computer program code which, when executed, causes the method performed by the network device in the above aspects to be performed.

In a thirteenth aspect, the present application provides a chip system, where the chip system includes a processor, and the processor is configured to implement a function of a terminal in the methods in the above aspects. In one possible design, the chip system further includes a memory for holding program instructions and/or data. The chip system can be composed of chips, and can also comprise chips and other discrete devices.

In a fourteenth aspect, the present application provides a chip system, which includes a processor, configured to implement the functions of the network device in the methods of the above aspects. In one possible design, the chip system further includes a memory for holding program instructions and/or data. The chip system can be composed of chips, and can also comprise chips and other discrete devices.

In a fifteenth aspect, the present application provides a computer-readable storage medium storing a computer program which, when executed, implements the method performed by the terminal in the above aspects.

In a sixteenth aspect, the present application provides a computer readable storage medium storing a computer program which, when executed, implements the method performed by the network device in the above aspects.

Drawings

FIG. 1 is a diagram of a network architecture in an embodiment of the application;

fig. 2a is a schematic diagram of PDSCH mapping of type a in an embodiment of the present application;

fig. 2B is a schematic diagram of PDSCH mapping of type B in an embodiment of the present application;

fig. 3 is a schematic diagram of PDSCH processing time in an embodiment of the present application;

fig. 4 is a schematic diagram of PDSCH overlapping CORESET in an embodiment of the present application;

FIGS. 5, 6, 7 and 8 are flowcharts in embodiments of the present application;

fig. 9 is a schematic diagram of a communication device in an embodiment of the present application;

fig. 10 is a schematic diagram of a terminal in an embodiment of the present application;

fig. 11 is a schematic diagram of a network device in an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.

Fig. 1 is a schematic diagram of a network architecture suitable for the embodiment of the present application. As shown in fig. 1, a terminal (such as terminal 1301 or terminal 1302) may access a wireless network to obtain services of an external network (e.g., the internet) through the wireless network, or communicate with other devices through the wireless network, such as may communicate with other terminals. The wireless network includes a radio access network (radio access network, RAN) for accessing the terminal to the wireless network and a Core Network (CN) for managing the terminal and providing a gateway for communication with an external network.

The terminal, RAN and CN referred to in fig. 1 are described in detail below, respectively.

1. Terminal

The terminal comprises a device providing voice and/or data connectivity to the user and may comprise, for example, a handheld device having wireless connectivity, or a processing device connected to a wireless modem. The terminal may communicate with the core network via the RAN, exchanging voice and/or data with the RAN. A terminal may also be referred to as a terminal device, user Equipment (UE), mobile station, mobile terminal, etc. The terminal device may be a mobile phone, a tablet computer, a computer with a wireless transceiving function, a virtual reality terminal device, an augmented reality terminal device, a wireless terminal in industrial control, a vehicle-mounted wireless terminal, a wireless terminal in teleoperation, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, or the like. An in-vehicle wireless terminal refers to a terminal device placed in or mounted in a vehicle, and may also be referred to as an on-board unit (OBU). The terminal device may also be a wearable device. The wearable device can also be called as a wearable intelligent device or an intelligent wearable device, and is a generic name for intelligently designing daily wear and developing wearable devices by applying wearable technology, such as glasses, gloves, watches, clothes, shoes and the like. The terminal device may also be other devices capable of communicating with the network device, such as a relay device. The embodiment of the application does not limit the specific technology and the specific equipment form adopted by the terminal equipment.

2.RAN (radio Access network)

One or more RAN devices, such as RAN device 1101, RAN device 1102, may be included in the RAN. The interface between the RAN device and the terminal may be a Uu interface (or referred to as a null interface). Of course, in future communication systems, the names of these interfaces may be unchanged or may be replaced by other names.

A RAN device is a node or device that accesses a terminal to a wireless network, which may also be referred to as a network device. The network device may be a base station (base station), an evolved NodeB (eNodeB), a transmission and reception point (transmission reception point, TRP), a next generation NodeB (gNB) in a 5G mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system, etc.; the present invention may also be a module or unit that performs a function of a base station part, for example, a Central Unit (CU) or a Distributed Unit (DU). The embodiment of the application does not limit the specific technology and the specific device form adopted by the network device.

3. CN (CN)

One or more CN devices, such as CN device 120, may be included in the CN. Taking a 5G communication system as an example, the CN may include an access and mobility management function (access and mobility management function, AMF) network element, a session management function (session management function, SMF) network element, a user plane function (user plane function, UPF) network element, a policy control function (policy control function, PCF) network element, a unified data management (unified data management, UDM) network element, an application function (application function, AF) network element, and the like.

It should be understood that the number of each device in the communication system shown in fig. 1 is merely illustrative, and the embodiments of the present application are not limited thereto, and more terminals, more RAN devices, and other devices may be further included in the communication system in practical applications.

The network architecture illustrated in fig. 1 may be applied to communication systems of various radio access technologies (radio access technology, RAT), for example, a long term evolution (long term evolution, LTE) communication system, a 5G NR communication system, or a future communication system. The network architecture and the service scenario described in the embodiments of the present application are for more clearly describing the technical solution of the embodiments of the present application, and as a person of ordinary skill in the art can know, with the evolution of the communication network architecture and the appearance of a new service scenario, the technical solution provided in the embodiments of the present application is also applicable to similar technical problems.

In the embodiments of the present application, the time domain symbols may be orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) symbols or discrete fourier transform spread OFDM (Discrete Fourier Transform-spread-OFDM, DFT-s-OFDM) symbols. Symbols in embodiments of the present application all refer to time domain symbols, unless otherwise specified.

It is understood that in the embodiments of the present application, the physical downlink shared channel (physical downlink shared channel, PDSCH), the physical downlink control channel (physical downlink control channel, PDCCH), the physical uplink control channel (physical uplink control channel, PUCCH) and the physical uplink shared channel (physical uplink shared channel, PUSCH) are just examples of downlink data channels, downlink control channels, uplink control channels and uplink data channels, and the data channels and the control channels may have different names in different systems and different scenarios.

In the embodiment of the present application, the functions of the network device may be performed by modules (such as chips) in the network device, or may be performed by a control subsystem including the functions of the base station. The control subsystem comprising the base station function can be a control center in industrial Internet of things application scenes such as intelligent power grids, factory automation and intelligent transportation. The functions of the terminal device may also be performed by modules (e.g., chips) in the terminal device.

The following explains the related technical features related to the embodiments of the present application.

1. PDSCH resource indication in downlink control information (downlink control informatioin, DCI)

In NR, DCI is carried on PDCCH, and two fields are included in DCI carried on PDCCH for scheduling PDSCH: frequency domain resource allocation (frequency domain resource assignment) and time domain resource allocation (time domain resource assignment). The UE determines a time-frequency resource block according to the information of the two domains, and PDSCH and DMRS of PDSCH are transmitted in the resource block.

2. PDSCH time domain mapping mode

In NR, PDSCH has two mapping methods, namely: a mapping type A (mapping type A) and a mapping type B (mapping type B). The starting symbol S and the number of persistent symbols L of the two types of PDSCH are different, and the positions of DMRS are also different.

As shown in table 1, the starting symbol S for the PDSCH of type a may be the first 4 symbols {0,1,2,3} of one slot, the number of persistent symbols L for the PDSCH may be {3, …,14} or the like. The starting symbol S for the PDSCH of type B may be the first 13 symbols {0, …,12} of one slot, the number of persistent symbols L for the PDSCH may be {2,4,7} or the like. Of course, the above description is given by taking the symbol of the normal cyclic prefix as an example, and the symbol of the extended cyclic prefix is similar to the symbol of the extended cyclic prefix and will not be repeated.

TABLE 1

As shown in fig. 2a, taking PDSCH of type a as an example, the start symbol S is 2 and the number of persistent symbols L is 11. As shown in fig. 2B, taking PDSCH of type B as an example, the start symbol is 4 and the number of persistent symbols is 2; or the start symbol is 8 and the number of persistent symbols is 4.

3. Resources that cannot be used to transmit PDSCH

In NR, some resources that cannot be used to transmit PDSCH are defined. If these resources overlap with PDSCH time-frequency resources scheduled by the DCI, the overlapping resources cannot be used to transmit PDSCH.

Meanwhile, in order to reduce the complexity of channel estimation, the protocol specifies: the DMRS of the PDSCH is not expected by the UE to overlap with resources that cannot be used to transmit the PDSCH. The resources that cannot be used for transmitting PDSCH are mainly the following 3 classes:

1. resource Block (RB) symbol (symbol) level resource

2. Resource Element (RE) -level resource

3. SSB-level resources.

The embodiments of the present application mainly relate to CORESET resources in RB symbol level resources, and will be described in the following embodiments.

4. CORESET

In NR, a time-frequency resource of wireless communication between a base station and a terminal may be divided into two areas, namely a control area and a data area, where the control area includes one or more CORESETs, each control resource set may include one or more control-channel elements (CCEs), and the base station may map one PDCCH to one or more CCEs for transmission. Hence, CORESET is embodied as a block of time-frequency resources in the control region.

5. DMRS in PDSCH

As can be seen from the above description, in the PDSCH time domain symbols scheduled by DCI, DMRS for channel estimation is carried on several symbols, so that PDSCH demodulation and decoding can be performed according to the channel estimation result.

In NR, DMRS of PDSCH mainly includes two types, i.e., a front-loaded (front-loaded) DMRS and an additional (additional) DMRS. For a pre-loaded DMRS, for a PDSCH of a type B, the original position of the type B is always positioned on the first symbol or the first two symbols of the PDSCH; for the additional DMRS, the additional DMRS exists only when the time domain length of the PDSCH is greater than or equal to 5 symbols, and the specific position is specified in the protocol, and the positions of the additional DMRS in the PDSCH of different lengths are different. Since the channel changes rapidly with time, more DMRS are needed to ensure channel estimation performance, and the additional DMRS is mainly used to improve PDSCH reception performance under high-speed channels.

When the pre-loaded DMRS of PDSCH overlaps with the time-frequency resources of CORESET, the pre-loaded DMRS and the additional DMRS need to be moved backward simultaneously. The following restrictions are given for the backward shift of DMRS in the NR protocol:

1. for PDSCH of length 2, DMRS cannot be later than the 2 nd symbol;

2. for PDSCH of length 5, if one additional DMRS is configured, the additional DMRS cannot be later than the 5 th symbol;

3. For a PDSCH of length 7 (normal cyclic redundancy prefix) or a PDSCH of length 6 (extended cyclic redundancy prefix), then

3.1, the pre-loaded DMRS cannot be later than the 4 th symbol;

3.2 if an additional DMRS is configured, the pre-loaded DMRS and the additional DMRS are located in the 1 st symbol and the 5 th symbol or moved to the 2 nd symbol and the 6 th symbol, otherwise no additional DMRS are sent.

4. For other PDSCH of length L, DMRS cannot be later than the L-1 st symbol.

4.1 for PDSCH of

length

12 or 13, DMRS cannot be later than the 12 th symbol of the slot (note this is limited by the absolute position in the slot).

6. Processing time of PDSCH

In NR, two kinds of processing capacities, UE processing capacity 1 (UE processing capability 1) and UE processing capacity 2 (UE processing capability 2), are defined for the processing time of PDSCH, and are hereinafter abbreviated as processing capacity 1 and processing capacity 2, respectively. PDSCH processing time, specifically, refers to the time required for a UE to receive PDSCH until its corresponding hybrid automatic repeat request (hybrid automatic repeat request, HARQ) feedback is generated.

As shown in fig. 3, specifically, the time from the end of the last symbol of PDSCH to the first symbol of PUCCH carrying the corresponding HARQ is not less than PDSCH processing time T _proc,1 ：

T _proc,1 ＝(N ₁ +d _1,1 +d ₂ )(2048+144)·κ2 ^-μ ·T _C +T _ext ；

That is, the terminal must be designed to be able to be at T _proc,1 Reception of PDSCH can be completed and corresponding HARQ can be generated to cope with the strictest scheduling requirements. The parameters in the above formula are described in detail below:

1. n1 is the processing time of PDSCH specified by the protocol

Wherein, table 2 is defined for a terminal of PDSCH processing capability 1, the second column is suitable for configuring a scene of a pre-loaded DMRS and not configuring an additional DMRS, and the third column is suitable for configuring a scene of a pre-loaded DMRS and an additional DMRS at the same time; table 3 is defined for a terminal of PDSCH processing capability 2, where additional DMRS is not allowed to be configured. Wherein, under the same subcarrier spacing and DMRS configuration, the PDSCH processing time of processing capability 2 is less than the PDSCH processing time of processing capability 1.

In tables 2 or 3, u corresponds to different subcarrier spacings, 0 represents 15kHz,1 represents 30kHz,2 represents 60kHz, and 3 represents 120kHz. Since the whole process involves PDSCH carrying downlink data, PDCCH where DCI of the PDSCH is scheduled, PUCCH or PUSCH where HARQ corresponding to the PDSCH is located, and the subcarrier intervals of downlink/uplink carriers where the channels are located may be different, in this case, u takes the information such that T can be _proc,1 The subcarrier spacing with the largest value.

Table 2: PDSCH processing time for processing capability 1

Table 3: PDSCH processing time for processing capability 2

2、d _1,1 Is to consider the relaxation of processing time introduced by the overlapping situation of PDCCH and PDSCH

The terminal must first receive the PDCCH and decode and parse the DCI information carried on the PDCCH to know the position of the PDSCH and related physical layer parameters, and then demodulate and decode the PDSCH, so that the overlapping of the two may affect the processing speed of the PDSCH. PDSCH for type B, d _1,1 The values of (2) are as follows:

(1) D when the number of symbols of PDSCH is greater than or equal to 7 _1,1 The value is 0;

(2) D when the number of symbols of PDSCH is greater than or equal to 3 and less than or equal to 6 _1,1 The value of (2) is equal to the number of symbols overlapped by PDSCH and PDCCH for scheduling the PDSCH;

(3) When the number of symbols of the PDSCH is equal to 2,

first, if the PDCCH on which the PDSCH is scheduled is on CORESET of 3 symbol length, and the CORESET is the same as the starting symbol of the PDSCH, d _1,1 The value of (2) is 0;

second, otherwise d _1,1 Equal to the number of symbols that the PDSCH overlaps with the PDCCH scheduling the PDSCH.

3. d2 is a parameter introduced when overlapping uplink channels of different priorities is considered, and is irrelevant to the design.

In addition to the above, inIn the above formula, tc represents a time unit, e.g., T _c ＝1/(Δf _max ·N _f ) The method comprises the steps of carrying out a first treatment on the surface of the Wherein Δf _max ＝480·10 ³ Hz and N ^f =4096; kappa represents the ratio between Ts and Tc, taking the fixed value kappa=t _s /T _c ＝64。

T _ext In the operation of shared spectrum channel access, 1 is taken, and the rest scenes are taken as 0.

Since the influence of DMRS back-off is not considered in the processing time of PDSCH in the current scheme. Several scenarios for DMRS back-off are illustrated in fig. 4, where only the effect of the pre-loaded DMRS is considered for simplicity. CORESET1 in fig. 4 is CORESET where PDCCH1 corresponding to PDSCH1 is located, and is not overlapped with PDSCH1, so d in the processing time requirement is concerned _1,1 The value is zero.

Referring to the upper right diagram of fig. 4, taking a 7-symbol PDSCH as an example, since CORESET 2 overlaps PDSCH1, the DMRS of the PDSCH1 is shifted from the 1 st symbol of the PDSCH to the 4 th symbol, and since the UE must perform channel estimation after receiving the DMRS, then can demodulate and decode PDSCH1 using the channel estimation value. The backward shift of the pre-loaded DMRS shortens the available processing time of the terminal for the PDSCH, possibly causing the UE to decode the PDSCH less quickly or adopting a simplified algorithm to complete in a shorter time, thereby affecting the downlink reception performance. The impact of such processing time compression is greater for terminals that require inherently high processing power 2.

Based on the above, the embodiments of the present application provide the following three schemes, so as to avoid the problem that the processing time of the PDSCH is shortened and the reception performance of the terminal is affected due to the backward movement of the DMRS.

The first scheme is as follows: a new time parameter d3 is introduced, and the time parameter d3 participates in calculating the processing time of the PDSCH, so that the processing time of the PDSCH can be increased to a certain extent, and the receiving performance of the terminal is ensured.

The second scheme is as follows: as can be seen by comparing table 2 with table 3, the PDSCH processing time is shorter for the terminal of capability 2. When the terminal is in the processing capability 2 and the DMRS is moved backwards, the terminal can be enabled to fall back to the processing capability 1 to calculate the processing time of the PDSCH, and the processing time of the PDSCH is increased.

Third scheme: a new capability is designed for the terminal, for example, the terminal can report to the network device whether the terminal supports the capability of DMRS back-shifting. If the terminal does not support, the network device no longer schedules time-frequency resources for the terminal where the DMRS of PDSCH overlaps with CORESET.

Example 1

This embodiment is used to introduce the first solution described above, and the method includes: when the DMRS of the PDSCH is overlapped with the time-frequency resource of the CORESET, determining the backward movement distance of the DMRS; determining a first time parameter d3 according to at least one of a back-off distance of the DMRS and a duration of the PDSCH; and determining the processing time of the PDSCH according to the first time parameter d 3. It should be noted that, in the scheme of this embodiment of the present application, the time-frequency resource of the DMRS overlaps with the time-frequency resource of CORESET, which may specifically refer to: the time-frequency resources of the pre-loaded DMRS overlap with the time-frequency resources of the CORESET. The following embodiment two is similar to the embodiment three, and will not be described in any more detail.

The execution subject of the method can be a terminal or a network device. Alternatively, the terminal may be a module in the terminal, and the network device may be a module in the network device. For a terminal, after determining the processing time of the PDSCH, the terminal may receive, decode, and generate HARQ feedback corresponding to the PDSCH within less than or equal to the processing time of the PDSCH. For the network device, after determining the processing time of the PDSCH, it may be ensured that the time interval between the scheduled PUCCH and the PDSCH is greater than or equal to the processing time of the PDSCH.

Optionally, the value of the first time parameter d3 may be any one of the following:

1: the value of the first time parameter d3 is related to the backward shift distance of the DMRS

1.1: the value of the first time parameter d3 is equal to the backward movement distance of the DMRS. For example, if the backward shift distance of DMRS is 2, the value of d3 is 2.

1.2: determining a first value set from a plurality of value sets according to the backward movement distance of the DMRS; and determining the first time parameter d3 according to the first numerical value set. For example, the first time parameter d3 may have a value equal to the first value in the first set of values according to a pre-configured condition. For example, the plurality of value sets may be divided into gear steps, where each gear step corresponds to a value set. For example, if the range of the backward movement distance a of the DMRS is 1-X, the total X number of 1-X may be divided into Y gear steps, which may be (1, X1-1), (X1, X2-1), (X2, X3-1), respectively, until (X _Y-1 X). Then:

when 1< = a < x1, then d3 takes on one of values 1 to x1-1, which value d3 takes in particular 1 to x1-1 can be specified by the protocol.

When x1< = a < x2, then d3 takes one of x1 to x2-1, and similarly, as to which value d3 specifically takes x1 to x2-1 may be specified by the protocol. In other gear positions, the value of a is similar to that described above, and will not be repeated.

In one design, the backward shift distance of the DMRS may be divided into one gear, i.e., 1 to X is divided into one gear, the value corresponding to d3 is one of 1 to X, and which value d3 specifically takes 1 to X may be specified by a protocol, and is assumed to be Xs. The scheme is also equivalent to: if DMRS backward shift occurs, d3 takes on value Xs, otherwise d3 takes on value 0.

1.3: the value of the first time parameter d3 is the maximum value of the following 2 values: 0, last_pos_dmrsshift-last_pos_dmrsconfigure. It should be noted that the symbol between the variable "last_pos_dmrsshift" and the variable "last_pos_dmrscon configuration" is "minus", and the "last_pos_dmrsshift-last_pos_dmrscon configuration" represents the difference between the two variables. The last_pos_dmrsshift refers to an OFDM symbol index where the last DMRS after the DMRS shift-back operation is located, and last_pos_dmrsconsignment refers to an OFDM symbol index where the last DMRS of the configuration obtained according to the protocol preset or the network configuration before the DMRS shift-back operation is located. When the additional DMRS are configured, if the additional DMRS are shifted out of the symbol range where the PDSCH is located after the additional DMRS are not transmitted any more, the last_pos_dmrsshift is the index of the OFDM symbol where the last pre-loaded DMRS is located after the backward operation, the last_pos_dmrsconsigned is the OFDM symbol index where the last additional DMRS is located, which is preset according to the protocol or is configured by the network before the DMRS backward operation, and the value of the last_pos_dmrsshift_pos_dmrsconsigned may be a negative value, then the value of d3 is 0.

2: the value of the first time parameter d3 is related to the backward shift distance of the DMRS and the duration of the PDSCH

2.1: and when the duration time of the PDSCH is smaller than or equal to a duration time threshold, the value of the first time parameter d3 is 0.

2.2: and on the condition that the duration time of the PDSCH is larger than the duration time threshold, determining the first time parameter d3 according to the backward movement distance of the DMRS. How to determine the first time parameter d3 according to the backward movement distance of the DMRS can be described in the above case 1.

2.3: and when the duration of the PDSCH is a value in a preset set, determining the first time parameter d3 according to the backward movement distance of the DMRS. The preset set satisfies at least one of the following conditions:

1) The preset set comprises N values, wherein N is smaller than the total number of the values of the PDSCH duration time allowed by the protocol. For example, the PDSCH duration allowed by the protocol includes 12 values {2,3, … …,13}, and the number N of values in the preset set is smaller than 12.

2) And if the values in the preset set are smaller than or equal to the second duration threshold, for example, the second duration threshold is 7, the values in the preset set are smaller than or equal to 7.

For example, the preset set may be {5,6}, n=2 satisfying less than 12, and the values in the set are all less than 7.

For another example, the preset set may be {5}, n=1 satisfying less than 12, and the values in the set are all less than 7.

It should be noted that the above description of "the PDSCH duration allowed by the protocol includes {2,3, … …,13} 12 values in total" or "the second duration threshold is 7", etc. is only illustrative, and is not limited to other values.

For how to determine the first time parameter d3 according to the back-off distance of the DMRS, see the description of case 1 above.

Optionally, in the embodiment of the present application, the processing time of the PDSCH is determined according to the first time parameter d3, and the following condition may be satisfied:

T _proc,1 ＝(N ₁ +d _1,1 +d ₂ +d ₃ )(2048+144)·κ2 ^-μ ·T _C +T _ext

wherein the T is _proc,1 Representing the processing time of the PDSCH, the N ₁ Indicating the processing time of PDSCH determined according to subcarrier spacing, processing capability of terminal and whether additional DMRS is configured, see the description in table 2 or table 3 above, d ₁₁ Represents the relaxation time introduced by the overlap of the test PDCCH and PDSCH, said d ₂ Representing parameters introduced by considering different priority uplink channel overlaps, said d ₃ Representing the first time parameter, the T _C Representing time units, said T _ext Taking 1 in the operation of shared spectrum channel access, taking 0 in the rest of the scenes, wherein kappa is a constant 46, and u indicates subcarrier spacing.

Alternatively, consider the CORESET where the PDCCH corresponding to the PDSCH is located if there is one of CORESETs overlapping PDSCH time-frequency resources, i.e., d _1,1 A non-zero scene. The impact of PDCCH resolution and DMRS channel estimation may also be considered comprehensively. The above-mentioned determining the processing time of PDSCH according to the first time parameter d3 may satisfy the following conditions:

for the meaning of the parameters in this formula, reference is made to the above.

Alternatively, CORESETs configured by a network device to a terminal device may be divided into two categories, one category being CORESETs where PDCCHs including scheduled PDSCH are located, and the other category being other CORESETs. The overlapping time-frequency resource of the PDCCH and the PDSCH is a sub-scene of the overlapping time-frequency resource of the CORESET and the PDSCH, namely, when the time-frequency resource of the PDCCH and the PDSCH are overlapped, the overlapping time-frequency resource of the CORESET and the PDSCH is necessarily caused. Accordingly, when considering the influence on the PDSCH processing time, only the influence of the CORESET-induced DMRS shift-back on the PDSCH processing time may be considered. The above-mentioned determining the processing time of PDSCH according to the first time parameter d3 may satisfy the following conditions:

T _proc,1 ＝(N ₁ +d ₃ +d ₂ )(2048+144)·κ2 ^-μ ·T _C +T _ext

With respect to the meaning of the parameters in this formula, reference is made to the description above.

It should be noted that d3 in the above formula is only an illustration, and d1,1 may be substituted in practical application, and it is only necessary to illustrate that when the DMRS shift caused by CORESET occurs, the value of d1,1 is determined according to the DMRS shift distance, and the specific determination manner can be referred to the description of the

above cases

1 and 2.

It should be noted that the solution of the first embodiment described above is applicable to a terminal with processing capability 1, and also to a terminal with processing capability 2. Since the original PDSCH processing time of the terminal with processing capability 2 is shorter, the DMRS is more affected by the backward shift, and the effect of improving the terminal with processing capability 2 is more obvious by increasing the first time parameter d 3. If the above scheme is applied to the terminal of processing capability 1, since the corresponding PDSCH DMRS of the terminal of processing capability 1 includes at least the pre-loaded DMRS, an additional DMRS may also be included. Because in the current scheme, if DMRS shift backward occurs, the pre-loaded DMRS and the additional DMRS move simultaneously, and the moving distance of the pre-loaded DMRS and the additional DMRS is the same. Correspondingly, the DMRS shift-back distance in the first embodiment may specifically refer to the shift-back distance of the pre-loaded DMRS, and may also specifically refer to the shift-back distance of the additional DMRS. If the above scheme is applied to the terminal of processing capability 2, only the pre-loaded DMRS is included in its corresponding PDSCH DMRS due to the terminal of processing capability 2. Correspondingly, the DMRS shift-back distance in the first embodiment may specifically refer to the shift-back distance of the pre-loaded DMRS.

As shown in fig. 5, a flow of a communication method is provided, where the flow may be an example in which the method in the first embodiment is applied to a terminal, and the terminal is taken as a UE, and the network device is taken as a base station, and the method at least includes:

step 501: the UE receives DCI from the base station, the DCI including a HARQ feedback timing indication field, the HARQ feedback timing field indicating a time unit of an interval between a PUCCH and a PDSCH, the PUCCH being used to carry HARQ feedback of the PDSCH. It is understood that the time unit in the embodiments of the present application may be a radio frame, a subframe, a slot, a minislot, or a symbol.

For example, when PDSCH is located in time element n and HARQ feedback timing indication field indicates k, PUCCH for carrying HARQ feedback of PDSCH is located in time element n+k. Further, if the time unit carrying the PDSCH includes a plurality of time units, the last time unit of the PDSCH is taken as a time unit n, and the time unit in which the PUCCH carrying the HARQ feedback of the PDSCH is located is determined as n+k in combination with k indicated by the HARQ feedback timing indication field. Further, if the time unit carrying the PUCCH includes a plurality of time units, the first time unit carrying the PUCCH is taken as time unit n+k. The last time unit of the PDSCH refers to the time unit in which the last OFDM symbol of the PDSCH is located, and the first time unit of the PUCCH refers to the time unit in which the first OFDM symbol of the PUCCH is located.

Step 502: and determining the backward movement distance of the DMRS under the condition that the time-frequency resource of the DMRS for bearing the PDSCH overlaps with the time-frequency resource of the CORESET. Alternatively, the time-frequency resources of DMRS of PDSCH and the time-frequency resources of CORESET may be completely overlapped or partially overlapped.

In one example, as shown in the upper right diagram of fig. 4, since CORESET2 overlaps PDSCH1, the DMRS for the pre-loading of PDSCH1 is shifted back from the 1 st symbol to the 4 th symbol of the PDSCH, and the shift back distance of the DMRS is 3 symbols.

Step 503: the first time parameter d3 is determined according to at least one of a back-off distance of the DMRS and a duration of the PDSCH. As for the process of determining the first time parameter d3, reference is made to the foregoing description of the first embodiment.

Step 504: the processing time T is determined according to the first time parameter d3. The processing time T is the processing time of the PDSCH, and the process of determining the processing time T according to the first time parameter d3 can be referred to as the process of determining the processing time of the PDSCH according to the first time parameter d3. The processing time T includes a time required for the UE to generate corresponding HARQ feedback information from reception of the PDSCH, and may be also understood as a maximum processing time of the PDSCH.

Step 505: and under the condition that the first symbol of the PUCCH is not earlier than the earliest feedback symbol, the UE transmits HARQ feedback information to the base station, wherein the earliest feedback symbol is a symbol determined according to the last symbol of the PDSCH and the processing time T, and the HARQ feedback information is determined according to the decoding result of the PDSCH.

Optionally, the method further comprises: in the condition that the first symbol of the PUCCH is earlier than the earliest feedback symbol, the UE may not transmit the HARQ feedback information, or the UE may transmit a negative-acknowledgement (NACK) to the base station, where the NACK indicates that the PDSCH has not yet been decoded, or the UE may directly discard the DCI received in step 501, or the like.

By the method, when the first symbol of the PUCCH scheduled by DCI is not earlier than the last feedback symbol, the UE sends HARQ feedback information to the base station again, and the receiving and feedback performance of the UE is ensured. Meanwhile, by increasing the first time parameter d3, the processing time T of the UE can be increased, and the receiving and feedback performances of the UE are further ensured.

As can be seen from the foregoing description, the method in the first embodiment may be applied to the terminal of the capability 1 or the terminal of the capability 2, and as shown in fig. 6, a flow of a communication method is provided, where the flow may be an example in which the scheme in the first embodiment is applied to the terminal of the capability 2, and the terminal is taken as a UE, and the network device is taken as a base station, and the flow at least includes:

Step 601: the UE reports to the base station whether it supports PDSCH processing capability 2.

In one possible implementation, processing capability 1 is basic capability and no reporting is required. If the UE supports the processing capacity 2, the processing capacity needs to be reported independently; if the UE does not support processing capability 2, no reporting is needed and the base station defaults to not support.

Step 602: the base station sends configuration information to the UE, including whether to turn on processing capability 2 and CORESET related configuration parameters.

Step 603: the UE determines whether to enter processing capability 2 according to the configuration information and determines the time-frequency resource location of CORESET.

Step 604: the base station transmits PDCCH1 to the UE on core 1, and transmits PDSCH1 corresponding to DCI1 carried on PDCCH 1.

Step 605: the UE blindly detects the PDCCH1 on the CORESET1, receives and analyzes the information of the DCI1 carried on the PDCCH1, continuously receives the PDSCH1 according to the information of the DCI1, and determines the processing time of the PDSCH.

If the UE determines that the UE enters the processing capability 2 according to the configuration information in step 603, and the forward DMRS is shifted backward due to overlapping of the CORESET and the time-frequency resource of the PDSCH, the processing time T for the PDSCH _proc,1 The UE may introduce a new offset parameter d3, see the foregoing for the value of d 3. Processing time T for PDSCH _proc,1 The relation with d3 can be found in the following formula:

T _proc,1 ＝(N ₁ +d _1,1 +d ₂ +d ₃ )(2048+144)·κ2 ^-μ ·T _C +T _ext ；

further, if there is CORESET1 where PDCCH1 corresponding to PDSCH1 is located in CORESET overlapped with PDSCH1, i.e. d _1,1 A non-zero scene. The analysis of the PDCCH and the influence of channel estimation of the DMRS may also be comprehensively considered. Processing time T for PDSCH _proc,1 The relation with d3 can be found in the following formula:

T _proc,1 ＝(N ₁ +max(d _1,1 ,d ₃ )+d ₂ )(2048+144)·κ2 ^-μ ·T _C +T _ext ；

through the above embodiment, the requirement of downlink data processing time is adjusted for the backward shift of the DMRS, so that the user can be guaranteed to finish data reception within a specified time, the downlink throughput is guaranteed, and meanwhile, the processing complexity of the user is not increased.

Example two

This embodiment is used to introduce a second solution, where the method includes: when the DMRS of the PDSCH overlaps with the time-frequency resource of the CORESET and the terminal is in the processing capacity of 2; and the terminal returns to the processing capability 1 and determines the processing time of the PDSCH.

The method may be performed by a terminal, or by a network device. It will be appreciated that the terminal may also be a module in a terminal and the network device may also be a module in a network device. After determining the processing time of the PDSCH, the terminal or the network device performs the subsequent processing similar to the first embodiment.

Alternatively, since the DMRS of its PDSCH includes only the pre-loaded DMRS when the terminal is in processing capability 2. When the backward shift position of the pre-loaded DMRS is equal to or later than the position of the original additional DMRS specified by the protocol, the backward shift of the DMRS is serious. As shown in table 2, for the terminal with processing capability 1, the time parameter N1 of the additional DMRS is greater than the parameter N1 of the previous DMRS at the same subcarrier interval. Therefore, in the case that the DMRS is severely moved backward, when the terminal is moved back to the processing capability 1, the processing time of the PDSCH may be determined specifically according to the time parameter (the time parameter may be N1) of the additional DMRS configured in the processing capability 1, so as to further increase the processing time of the PDSCH and ensure the receiving performance of the terminal.

As shown in fig. 7, a flow of a communication method is provided, where the flow is an example of applying the solution in the second embodiment to a terminal, and takes the terminal as a UE, and the network device as a base station as an example, and at least includes:

step 701: the method comprises the steps that UE receives DCI from a base station, wherein the DCI comprises an HARQ feedback timing indication field, the HARQ feedback timing indication field indicates a time unit of an interval between a PUCCH and a PDSCH scheduled by the DCI, and the PUCCH is used for bearing HARQ feedback information of the PDSCH;

Step 702: and under the condition that the time-frequency resource of the DMRS for bearing the PDSCH overlaps with the time-frequency resource of the CORESET and the UE supports the processing capability 2 and the processing capability 2 is enabled, determining the processing time T according to the parameter of the processing capability 1.

The processing time T is the PDSCH processing time described above. The processing time T includes a time required for the UE to generate corresponding HARQ feedback information from reception of the PDSCH. And under the same subcarrier spacing and DMRS configuration, the processing time T2 determined according to the processing capability 2 is smaller than the processing time T.

Step 703: and under the condition that the first symbol of the PUCCH is not earlier than the earliest feedback symbol, the UE transmits HARQ feedback information to the base station, wherein the earliest feedback symbol is a symbol determined according to the last symbol of the PDSCH and the processing time T, and the HARQ feedback information is determined according to the decoding result of the PDSCH.

Optionally, the method further comprises: on the condition that the first symbol of the PUCCH is earlier than the earliest feedback symbol, the UE no longer transmits the HARQ feedback information or transmits a negative acknowledgement NACK to the base station, the NACK indicating that demodulation and decoding of the PDSCH is not completed. Alternatively, the UE directly discards the DCI in step 701 described above.

For example, the UE determines the processing time T according to the parameter of the processing capability 1, including: when the UE supports the processing capability 2 and the processing capability 2 is enabled, the DMRS is a preloaded DMRS; and under the condition that the backward position of the pre-loaded DMRS is equal to or later than the position of the original additional DMRS specified by a protocol, determining the processing time T according to the parameters in the processing capacity 1 when the additional DMRS is configured.

As shown in fig. 8, a flow of a communication method is provided, where the flow is another example of applying the method in the second embodiment to a terminal, and taking the terminal as a UE and the network device as a base station as an example, the flow at least includes:

step 801: the UE reports to the base station whether it supports PDSCH processing capability 2.

In one possible implementation, processing capability 1 is basic capability and no reporting is required. If the UE supports the processing capacity 2, the processing capacity needs to be reported independently; if the UE does not support the processing capability 2, reporting is not needed, and the base station defaults to not support.

Step 802: the base station sends configuration information to the UE, including whether to turn on processing capability 2 and CORESET related configuration parameters.

Step 803: the UE determines whether to enter processing capability 2 according to the configuration information and determines the time-frequency resource location of CORESET.

Step 804: the base station transmits PDCCH1 to the UE on core 1, and transmits PDSCH1 corresponding to DCI1 carried on PDCCH 1.

Step 805: the UE blindly detects the PDCCH1 on the CORESET, receives and analyzes the information of the DCI1 carried on the PDCCH1, continuously receives the PDSCH1 according to the DCI1, and determines the processing time of the PDSCH.

If the UE determines that the UE is in capability processing 2 according to the configuration information, and the pre-load DMRS is moved backward due to overlapping time-frequency resources of CORESET and PDSCH, the UE is moved back to processing capability 1, and determines the processing time of PDSCH by using the relevant parameters of processing capability 1.

Alternatively, if the position to which the current DMRS is shifted back is already equal to or later than the position of the additional DMRS in the original protocol specification, the value of the additional DMRS in the processing capability 1 (which may be specifically the value in the third column of table 2 above) may be used to determine the processing time of the PDSCH.

By the method, the processing time of the PDSCH of the terminal with processing capability 2 is shorter, and when the DMRS is backwardly moved, the DMRS is more influenced, so that the generated problem is more remarkable. Therefore, in the embodiment of the present application, after the DMRS is shifted back, the terminal is retracted to the processing capability 1 to determine the processing time of the PDSCH, so that the processing time of the PDSCH can be increased to a certain extent, and the receiving performance of the terminal is ensured.

Example III

This embodiment describes the third aspect described above, the method comprising: the network equipment receives capability information from a terminal, wherein the capability information indicates the capability of the terminal for supporting or not supporting the backward movement of the DMRS symbols of the PDSCH; the network equipment schedules the PDSCH according to the capability information; when the terminal does not support the capability of the DMRS symbol backward movement of the PDSCH, the time-frequency resource of the DMRS for bearing the PDSCH is not overlapped with the time-frequency resource of CORESET. The network device may also be a module in a network device, and the terminal may also be a module in a terminal.

Optionally, the method further comprises: and the terminal receives DCI from the network equipment, wherein the DCI is used for scheduling the PDSCH, and the time-frequency resource of the DMRS of the PDSCH is not overlapped with the time-frequency resource of the CORESET under the condition that the terminal does not support the capability of backward movement of the DMRS symbols of the PDSCH.

In the embodiment of the present application, if the capability information reported by the terminal indicates that the capability of the terminal for supporting the DMRS symbol of the PDSCH to move backward, the base station may perform scheduling in which CORESET overlaps with the PDSCH; if the capability information reported by the terminal indicates that the capability of the terminal does not support the backward shift of the DMRS symbol of the PDSCH, the base station cannot perform the scheduling of CORESET and PDSCH overlapping. At this time, if the time-frequency resources of the CORESET scheduled by the base station and the PDSCH still overlap, the terminal may not receive the PDSCH, or the terminal may not feedback an Acknowledgement (ACK), or the terminal may always feedback a NACK.

In the following embodiments, the method is described in detail by taking a terminal as a UE and a network device as a base station as an example:

in one possible implementation, a new UE capability may be introduced that is the capability of the UE to support DMRS back-shifting after CORESET overlaps with PDSCH. The basic capability of the UE is that DMRS back-shifting is not supported, and if DMRS back-shifting is supported, additional reporting is required. For the UE reporting the capability, the base station may perform scheduling where CORESET overlaps with PDSCH. For UEs not reporting this capability, the base station may not schedule CORESET overlapping with PDSCH. Optionally, the CORESET does not include CORESET corresponding to PDCCH for scheduling PDSCH. Or alternatively, the process may be performed,

the new capability may be a capability that the UE does not support DMRS back-shifting. The basic capability of the UE is to support DMRS, while the new capability is a degraded capability, requiring additional reporting. For the UE reporting the capability, the base station may not schedule overlapping CORESET and PDSCH. For UEs not reporting this capability, the base station may schedule CORESET overlapping with PDSCH.

In the above embodiment, according to the capability distinction of the UE, the base station may perform adaptive scheduling for UEs with different capabilities, thereby ensuring the overall efficiency of the network.

The embodiment of the present application further provides a communication device, please refer to fig. 9, which is a schematic structural diagram of the communication device provided in the embodiment of the present application, where the communication device 900 includes: a transceiver module 910 and a processing module 920.

The communication device may be used to implement the functionality related to the terminal in any of the method embodiments described above. For example, the communication device may be a terminal, such as a handheld terminal or a vehicle mounted terminal; the communication device may also be a chip or a circuit included in the terminal, or a device including the terminal, such as various types of vehicles, or the like.

The communication means may be adapted to implement the functions relating to the network device in any of the method embodiments described above. The communication means may be, for example, a network device or a chip or a circuit comprised in a network device.

For example, when the communication apparatus performs the operation or step of the corresponding terminal in the method embodiment shown in fig. 5 in the above embodiment one, the transceiver module 910 is configured to receive DCI from a network device, where the DCI includes a HARQ feedback timing indication field, where the HARQ feedback timing indication field indicates a time unit between a PUCCH and a PDSCH scheduled by the DCI, and the PUCCH is used to carry HARQ feedback information of the PDSCH; a processing module 920, configured to determine a backward movement distance of a DMRS under a condition that a time-frequency resource of the DMRS for carrying the PDSCH overlaps with a time-frequency resource of CORESET, determine a first time parameter d3 according to at least one of the backward movement distance of the DMRS and a duration of the PDSCH, and determine a processing time T according to the first time parameter d3, where the processing time T includes a time required for the terminal to generate corresponding HARQ feedback information from reception of the PDSCH; the transceiver module 910 is further configured to send HARQ feedback information to the network device under a condition that a first symbol of the PUCCH is not earlier than an earliest feedback symbol, where the earliest feedback symbol is a symbol determined according to a last symbol of the PDSCH and the processing time T, and the HARQ feedback information is determined according to a decoding result of the PDSCH.

Optionally, the transceiver module 910 is further configured to: and under the condition that the first symbol of the PUCCH is earlier than the earliest feedback symbol, the HARQ feedback information is not sent or a negative acknowledgement NACK is sent.

In one possible design, the determining the first time parameter d3 according to the duration of the PDSCH includes: and under the condition that the duration time of the PDSCH is smaller than or equal to a duration time threshold, the value of the first time parameter d3 is 0.

In one possible design, the determining the first time parameter d3 according to the back-off distance of the DMRS and the duration of the PDSCH includes: and under the condition that the duration time of the PDSCH is larger than a duration time threshold, determining the first time parameter d3 according to the backward movement distance of the DMRS.

In one possible design, the determining the first time parameter d3 according to the backward movement distance of the DMRS includes: the value of the first time parameter d3 is equal to the backward movement distance of the DMRS.

In one possible design, the determining the first time parameter d3 according to the backward movement distance of the DMRS includes: determining a first value set from a plurality of value sets according to the backward movement distance of the DMRS; and determining the first time parameter d3 according to the first numerical value set.

Optionally, the determining the first time parameter d3 according to the first value set includes: and according to a preset condition, the value of the first time parameter d3 is equal to a first numerical value in the first numerical value set.

T _proc,1 ＝(N ₁ +d _1,1 +d ₂ +d ₃ )(2048+144)·κ2 ^-μ ·T _C +T _ext

wherein the T is _proc,1 Representing the processing time T, N ₁ Represents a processing time of a PDSCH determined according to a subcarrier spacing, a processing capability of the terminal, and whether or not an additional DMRS is configured, the d ₁₁ Represents the relaxation time introduced by considering the overlap of PDCCH and PDSCH, said d ₂ Representing parameters introduced by considering different priority uplink channel overlaps, said d ₃ Representing the first time parameter, the T _C Representing time units, said T _ext Taking 1 in the operation of shared spectrum channel access, the remaining scenarios take 0, and κ is denoted as a constant 64, where u indicates the subcarrier spacing.

When the communication apparatus performs the operation or step of the corresponding terminal in the method embodiment shown in fig. 7 in the second embodiment, the transceiver module 910 is configured to receive DCI from a network device, where the DCI includes an HARQ feedback timing indication field, and the HARQ feedback timing indication field indicates a time unit between a PUCCH and a PDSCH scheduled by the DCI, where the PUCCH is used to carry HARQ feedback information of the PDSCH; a processing module 920, configured to determine a processing time T according to a parameter of a processing capability 1 under a condition that a time-frequency resource of a DMRS for carrying the PDSCH overlaps with a time-frequency resource of a CORESET, and the terminal supports the processing capability 2 and the processing capability 2 is enabled, where the processing time T includes a time required for the terminal to generate corresponding HARQ feedback information from reception of the PDSCH, and under the same subcarrier interval and DMRS configuration, the processing time T2 determined according to the processing capability 2 is less than the processing time T; the transceiver module 910 is further configured to send HARQ feedback information to the network device under a condition that a first symbol of the PUCCH is not earlier than an earliest feedback symbol, where the earliest feedback symbol is a symbol determined according to a last symbol of the PDSCH and the processing time T, and the HARQ feedback information is determined according to a decoding result of the PDSCH.

Optionally, the transceiver module 910 is further configured to send no HARQ feedback information or send a negative acknowledgement NACK if the first symbol of the PUCCH is earlier than the earliest feedback symbol.

In one possible design, the determining the processing time T according to the parameter of the processing capability 1 includes: the terminal supports the processing capability 2 and the processing capability 2 is enabled, the DMRS being a preloaded DMRS; and under the condition that the backward position of the pre-loaded DMRS is equal to or later than the position of the original additional DMRS specified by a protocol, determining the processing time T according to the parameters in the processing capacity 1 when the additional DMRS is configured.

When the communication apparatus performs the operation or step of the corresponding network device in the third embodiment, the transceiver module 910 is configured to receive capability information from a terminal, where the capability information indicates a capability of the terminal for supporting or not supporting DMRS symbol backward movement of PDSCH; and a processing module 920, configured to schedule the PDSCH according to the capability information, where when the terminal does not support the capability of DMRS symbol backward movement of the PDSCH, the time-frequency resource for carrying the DMRS of the PDSCH is not overlapped with the time-frequency resource of CORESET.

When the communication apparatus performs the operation or step of the corresponding terminal device in the third embodiment, the transceiver module 910 is configured to send capability information to the network device, where the capability information indicates a capability of the terminal for supporting or not supporting the DMRS symbol backward movement of the PDSCH; the transceiver module 910 is further configured to receive DCI from the network device, where the DCI is used to schedule the PDSCH, and on the condition that the terminal does not support the capability of DMRS symbol back shift of the PDSCH, a time-frequency resource of the DMRS of the PDSCH is not overlapped with a time-frequency resource of CORESET.

The processing module 920 involved in the communication device may be implemented by at least one processor or processor-related circuit component and the transceiver module 910 may be implemented by at least one transceiver or transceiver-related circuit component or a communication interface. Optionally, the communication device may further include a storage module, where the storage module may be configured to store data and/or instructions, and the transceiver module 910 and/or the processing module 920 may read the data and/or instructions in the access module, so that the communication device implements a corresponding method. The memory module may be implemented, for example, by at least one memory.

The storage module, the processing module and the transceiver module may exist separately, or may be integrated in whole or in part, for example, the storage module and the processing module are integrated, or the processing module and the transceiver module are integrated, etc.

Fig. 10 is a schematic diagram of another structure of a communication device according to an embodiment of the present application. The communication device may in particular be a terminal, which may be used to implement the functionality of the terminal in any of the method embodiments described above. The terminal is illustrated as a mobile phone in fig. 10 for easy understanding and convenience of illustration. As shown in fig. 10, the terminal includes a processor, may further include a memory, and may, of course, also include a radio frequency circuit, an antenna, an input/output device, and the like. The processor is mainly used for processing communication protocols and communication data, controlling the terminal, executing software programs, processing data of the software programs and the like. The memory is mainly used for storing software programs and data. The radio frequency circuit is mainly used for converting a baseband signal and a radio frequency signal and processing the radio frequency signal. The antenna is mainly used for receiving and transmitting radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are mainly used for receiving data input by a user and outputting data to the user. It should be noted that some kinds of terminals may not have an input/output device.

When data need to be sent, the processor carries out baseband processing on the data to be sent and then outputs a baseband signal to the radio frequency circuit, and the radio frequency circuit carries out radio frequency processing on the baseband signal and then sends the radio frequency signal outwards in the form of electromagnetic waves through the antenna. When data is sent to the terminal, the radio frequency circuit receives a radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, and the processor converts the baseband signal into data and processes the data. For ease of illustration, only one memory and processor is shown in fig. 10. In an actual end product, there may be one or more processors and one or more memories. The memory may also be referred to as a storage medium or storage device, etc. The memory may be provided separately from the processor or may be integrated with the processor, which is not limited by the embodiments of the present application.

In the embodiment of the present application, the antenna and the radio frequency circuit with the transceiver function may be regarded as a transceiver unit of the terminal, and the processor with the processing function may be regarded as a processing unit of the terminal. As shown in fig. 10, the terminal includes a transceiving unit 1010 and a processing unit 1020. The transceiver unit may also be referred to as a transceiver, transceiver device, etc. The processing unit may also be called a processor, a processing board, a processing module, a processing device, etc. Alternatively, a device for implementing a receiving function in the transceiver unit 1010 may be regarded as a receiving unit, and a device for implementing a transmitting function in the transceiver unit 1010 may be regarded as a transmitting unit, i.e., the transceiver unit 1010 includes a receiving unit and a transmitting unit. The transceiver unit may also be referred to as a transceiver, transceiver circuitry, or the like. The receiving unit may also be referred to as a receiver, or receiving circuit, among others. The transmitting unit may also sometimes be referred to as a transmitter, or a transmitting circuit, etc. It should be understood that, the transceiver unit 1010 is configured to perform the transmitting operation and the receiving operation on the terminal side in the above-described method embodiment, and the processing unit 1020 is configured to perform other operations on the terminal other than the transmitting operation in the above-described method embodiment.

Fig. 11 is a schematic diagram of another structure of a communication device according to an embodiment of the present application. The communication means may in particular be a network device, such as a base station, for implementing the functions of the network device as described in any of the method embodiments above.

The network device 1100 includes: one or more DUs 1101 and one or more CUs 1102. The DU 1101 may include at least one antenna 11011, at least one radio frequency unit 11012, at least one processor 11013, and at least one memory 11014, among others. The DU 1101 is mainly used for receiving and transmitting radio frequency signals, converting radio frequency signals into baseband signals, and processing partial baseband signals.

The CU 1102 can include at least one processor 11022 and at least one memory 11021. The CU 1102 is mainly used for baseband processing, control of a base station, and the like. The CU 1102 is a control center of the base station and may also be referred to as a processing unit.

Communication between CU 1102 and DU 1101 may be via an interface, where the Control Plane (CP) interface may be Fs-C, such as F1-C, and the User Plane (UP) interface may be Fs-U, such as F1-U. The DU 1101 and CU 1102 may be physically located together or may be physically located separately (i.e., a distributed base station), and are not limited thereto.

Specifically, baseband processing on the CU and the DU may be divided according to protocol layers of the wireless network, for example, functions of a PDCP layer and above are set on the CU, and functions of a protocol layer (for example, RLC layer and MAC layer, etc.) below the PDCP layer are set on the DU. For another example, a CU implements the functions of a radio resource control (radio resource control, RRC) layer, a packet data convergence protocol (packet data convergence protocol, PDCP) layer, and a DU implements the functions of a radio link control (radio link control, RLC), medium access control (medium access control, MAC), and Physical (PHY) layer.

Alternatively, the network device 1100 may include one or more Radio Units (RUs), one or more DUs, and one or more CUs. Wherein the DU may include at least one processor 11013 and at least one memory 11014, the ru may include at least one antenna 11011 and at least one radio frequency unit 11012, and the cu may include at least one processor 11022 and at least one memory 11021.

In an embodiment, the CU 1102 may be configured by one or more boards, where the multiple boards may support a single access indicated radio access network (such as a 5G network) together, or may support radio access networks of different access schemes (such as an LTE network, a 5G network, or other networks) respectively. The memory 11021 and processor 11022 may serve one or more boards. That is, the memory and the processor may be separately provided on each board. It is also possible that multiple boards share the same memory and processor. In addition, necessary circuitry may be provided on each board. The DU 1101 may be formed by one or more single boards, where the multiple single boards may support a single access indicated radio access network (such as a 5G network), or may support radio access networks of different access schemes (such as an LTE network, a 5G network, or other networks). The memory 11014 and processor 11013 may serve one or more boards. That is, the memory and the processor may be separately provided on each board. It is also possible that multiple boards share the same memory and processor. In addition, each single board can be provided with necessary circuits.

The embodiment of the application also provides a chip system, which comprises: and a processor coupled to the memory, the memory for storing a program or instructions that, when executed by the processor, cause the system-on-chip to implement the method of the corresponding terminal or the method of the corresponding network device in any of the method embodiments described above.

Alternatively, the processor in the system-on-chip may be one or more. The processor may be implemented in hardware or in software. When implemented in hardware, the processor may be a logic circuit, an integrated circuit, or the like. When implemented in software, the processor may be a general purpose processor, implemented by reading software code stored in a memory.

Alternatively, the memory in the system-on-chip may be one or more. The memory may be integral with the processor or separate from the processor, and is not limited in this application. For example, the memory may be a non-transitory processor, such as a ROM, which may be integrated on the same chip as the processor, or may be separately provided on different chips, and the type of memory and the manner of providing the memory and the processor are not specifically limited in this application.

The system-on-chip may be, for example, a field programmable gate array (field programmable gate array, FPGA), an application specific integrated chip (application specific integrated circuit, ASIC), a system on chip (SoC), a central processing unit (central processor unit, CPU), a network processor (network processor, NP), a digital signal processing circuit (digital signal processor, DSP), a microcontroller (micro controller unit, MCU), a programmable controller (programmable logic device, PLD) or other integrated chip.

It should be understood that the steps in the above-described method embodiments may be accomplished by integrated logic circuitry in hardware in a processor or instructions in the form of software. The steps of a method disclosed in connection with the embodiments of the present application may be embodied directly in a hardware processor or in a combination of hardware and software modules in a processor.

Embodiments of the present application also provide a computer-readable storage medium having stored therein computer-readable instructions, which when read and executed by a computer, cause the computer to perform the method of any of the method embodiments described above.

The present application also provides a computer program product which, when read and executed by a computer, causes the computer to perform the method of any of the method embodiments described above.

The embodiment of the application also provides a communication system, which comprises the terminal equipment. Optionally, the communication system may further include a network device. Optionally, the communication system may further include a core network device.

It is to be appreciated that the processors referred to in the embodiments of the present application may be CPUs, but may also be other general purpose processors, DSP, ASIC, FPGA or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It should also be understood that the memory referred to in the embodiments of the present application may be volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile memory may be a read-only memory (ROM), a programmable ROM, an erasable ROM, an electrically erasable ROM, or a flash memory, among others. The volatile memory may be random access memory (random access memory, RAM) which acts as an external cache. By way of example, and not limitation, many forms of RAM are available, such as static random access memory, dynamic random access memory, synchronous dynamic random access memory, double data rate synchronous dynamic random access memory, enhanced synchronous dynamic random access memory, synchronous link dynamic random access memory, and direct memory bus random access memory.

Note that when the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, the memory (storage module) is integrated into the processor.

It should be noted that the memory described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

It should be understood that the various numbers referred to in the various embodiments of the present application are merely for convenience of description and the size of the sequence numbers of the above-mentioned processes or steps does not mean the order of execution, and the order of execution of the processes or steps should be determined by their functions and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

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

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

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

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

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

In the various embodiments of the application, if there is no specific description or logical conflict, terms and/or descriptions between the various embodiments are consistent and may reference each other, and features of the various embodiments may be combined to form new embodiments according to their inherent logical relationships.

Claims

A communication method applied to a terminal or a module in a terminal, comprising:

receiving Downlink Control Information (DCI) from network equipment, wherein the DCI comprises a hybrid automatic repeat request (HARQ) feedback timing indication field, and the HARQ feedback timing indication field indicates a time unit of an interval between a Physical Uplink Control Channel (PUCCH) and a Physical Downlink Shared Channel (PDSCH) scheduled by the DCI, wherein the PUCCH is used for bearing the HARQ feedback information of the PDSCH;

determining a backward movement distance of the DMRS under the condition that the time-frequency resource of the demodulation reference signal DMRS used for bearing the PDSCH overlaps with the time-frequency resource of the control resource set CORESET;

determining a first time parameter d3 according to at least one of a back-off distance of the DMRS and a duration of the PDSCH;

determining a processing time T according to the first time parameter d3, wherein the processing time T comprises the time required by the terminal to generate corresponding HARQ feedback information from the reception of the PDSCH;

and transmitting HARQ feedback information to the network equipment under the condition that the first symbol of the PUCCH is not earlier than the earliest feedback symbol, wherein the earliest feedback symbol is a symbol determined according to the last symbol of the PDSCH and the processing time T, and the HARQ feedback information is determined according to the decoding result of the PDSCH.
The method of claim 1, wherein the method further comprises:

and under the condition that the first symbol of the PUCCH is earlier than the earliest feedback symbol, the HARQ feedback information is not sent or a negative acknowledgement NACK is sent.
The method of claim 1 or 2, wherein the determining a first time parameter d3 according to the duration of the PDSCH comprises:

and under the condition that the duration time of the PDSCH is smaller than or equal to a duration time threshold, the value of the first time parameter d3 is 0.
The method of claim 1 or 2, wherein the determining a first time parameter d3 according to the back-off distance of the DMRS and the duration of the PDSCH comprises:

and under the condition that the duration time of the PDSCH is larger than a duration time threshold or when the duration time of the PDSCH is a value in a preset set, determining the first time parameter d3 according to the backward movement distance of the DMRS.
The method of any one of claims 1, 2, or 4, wherein the determining a first time parameter d3 from the back-off distance of the DMRS comprises:

the value of the first time parameter d3 is equal to the backward movement distance of the DMRS.
The method of any one of claims 1, 2, or 4, wherein the determining a first time parameter d3 from the back-off distance of the DMRS comprises:

determining a first value set from a plurality of value sets according to the backward movement distance of the DMRS;

and determining the first time parameter d3 according to the first numerical value set.
The method of claim 6, wherein said determining said first time parameter d3 from said first set of values comprises:

and according to a preset condition, the value of the first time parameter d3 is equal to a first numerical value in the first numerical value set.
The method according to any one of claims 4 to 7, wherein the preset set includes N values, where N is less than or equal to a total number of values of PDSCH duration specified by a protocol, and N is a positive integer; or, the values in the preset set all meet less than or equal to a second duration threshold.
The method according to any one of claims 1 to 8, wherein the treatment time T satisfies the following condition:

T _proc,1 ＝(N ₁ +d _1,1 +d ₂ +d ₃ )(2048+144)·κ2 ^-μ ·T _C +T _ext

wherein the T is _proc,1 Representing the processing time T, N ₁ Represents a processing time of a PDSCH determined according to a subcarrier spacing, a processing capability of the terminal, and whether or not an additional DMRS is configured, the d ₁₁ Represents a relaxation time introduced by considering the overlap of the physical downlink control channel PDCCH and PDSCH, said d ₂ Representing parameters introduced by considering different priority uplink channel overlaps, said d ₃ Representing the first time parameter, the T _C Representing time units, said T _ext Taking 1 in the operation of shared spectrum channel access, taking 0 in the rest of the scenes, wherein kappa is a constant 64, and u indicates subcarrier spacing.
The method according to any one of claims 1 to 8, wherein the treatment time T satisfies the following condition:

T _proc,1 ＝(N ₁ +max(d _1,1 ,d ₃ )+d ₂ )(2048+144)·κ2 ^-μ ·T _C +T _ext

wherein the T is _proc,1 Representing the processing time T, N ₁ Represents a processing time of a PDSCH determined according to a subcarrier spacing, a processing capability of the terminal, and whether or not an additional DMRS is configured, the d ₁₁ Represents the relaxation time introduced by considering the overlap of PDCCH and PDSCH, said d ₂ Representing parameters introduced by considering different priority uplink channel overlaps, said d ₃ Representing the first time parameter, the T _C Representing time units, said T _ext Taking 1 in the operation of shared spectrum channel access, the remaining scenarios take 0, and κ is denoted as a constant 64, where u indicates the subcarrier spacing.
A communication method applied to a terminal or a module in a terminal, comprising:

Receiving Downlink Control Information (DCI) from network equipment, wherein the DCI comprises a hybrid automatic repeat request (HARQ) feedback timing indication field, and the HARQ feedback timing indication field indicates a time unit of an interval between a Physical Uplink Control Channel (PUCCH) and a Physical Downlink Shared Channel (PDSCH) scheduled by the DCI, wherein the PUCCH is used for bearing the HARQ feedback information of the PDSCH;

under the condition that a time-frequency resource used for bearing a demodulation reference signal DMRS of the PDSCH overlaps with a time-frequency resource of a control resource set CORESET, and the terminal supports processing capacity 2 and the processing capacity 2 is enabled, determining processing time T according to a parameter of processing capacity 1, wherein the processing time T comprises time required by the terminal to generate corresponding HARQ feedback information from the reception of the PDSCH, and the processing time T2 determined according to the processing capacity 2 is smaller than the processing time T under the condition of the same subcarrier interval and the same DMRS configuration;

and transmitting HARQ feedback information to the network equipment under the condition that the first symbol of the PUCCH is not earlier than the earliest feedback symbol, wherein the earliest feedback symbol is a symbol determined according to the last symbol of the PDSCH and the processing time T, and the HARQ feedback information is determined according to the decoding result of the PDSCH.
The method of claim 11, wherein the method further comprises:

and under the condition that the first symbol of the PUCCH is earlier than the earliest feedback symbol, the HARQ feedback information is not sent or a negative acknowledgement NACK is sent.
The method according to claim 11 or 12, wherein said determining the processing time T based on the parameters of the processing capacity 1 comprises:

the terminal supports the processing capability 2 and the processing capability 2 is enabled, the DMRS being a preloaded DMRS;

and under the condition that the backward position of the pre-loaded DMRS is equal to or later than the position of the original additional DMRS specified by a protocol, determining the processing time T according to the parameters in the processing capacity 1 when the additional DMRS is configured.
A communication method applied to a network device or a module in a network device, comprising:

receiving capability information from a terminal, wherein the capability information indicates the capability of the terminal for supporting or not supporting the backward shift of a demodulation reference signal (DMRS) symbol of a Physical Downlink Shared Channel (PDSCH);

and scheduling the PDSCH according to the capability information, wherein when the terminal does not support the capability of the backward movement of the DMRS symbol of the PDSCH, the time-frequency resource for bearing the DMRS of the PDSCH is not overlapped with the time-frequency resource of a control resource set COESET.
A communication method applied to a terminal or a module in a terminal, comprising:

transmitting capability information to network equipment, wherein the capability information indicates the capability of the terminal for supporting or not supporting the backward shift of a demodulation reference signal (DMRS) symbol of a Physical Downlink Shared Channel (PDSCH);

and receiving downlink control information DCI from the network equipment, wherein the DCI is used for scheduling the PDSCH, and the time-frequency resources of the DMRS of the PDSCH are not overlapped with the time-frequency resources of a control resource set CORESET under the condition that the terminal does not support the capability of backward movement of the DMRS symbols of the PDSCH.
The method of claim 15, wherein the PDSCH is not received on a condition that the terminal does not support a capability of DMRS symbol back-shifting of PDSCH and time-frequency resources of DMRS of the PDSCH overlap with time-frequency resources of the CORESET.
A communication device comprising at least one processor coupled to at least one memory;

the at least one processor configured to execute the computer program or instructions stored by the at least one memory to cause the apparatus to perform the method of any one of claims 1 to 10 or to cause the apparatus to perform the method of any one of claims 11 to 13 or to cause the apparatus to perform the method of claim 14 or to cause the apparatus to perform the method of claim 15 or 16.
A computer readable storage medium storing instructions which, when executed, cause the method of any one of claims 1 to 10 to be implemented, or cause the method of any one of claims 11 to 13 to be implemented, or cause the method of claim 14 to be implemented, or cause the method of claim 15 or 16 to be implemented.
A communication device comprising a processor and an interface circuit;

the interface circuit is used for interacting code instructions or data with the processor;

the processor is configured to perform the method of any one of claims 1 to 10, or the processor is configured to perform the method of any one of claims 11 to 13, or the processor is configured to perform the method of claim 14, or to cause the apparatus to perform the method of claim 15 or 16.
A computer program, characterized in that, when the computer program is executed, it causes the method of any one of claims 1 to 10 or the method of any one of claims 11 to 13 or the method of claim 14 or the method of claim 15 or 16 to be implemented.