WO2022077876A1 - 一种通信方法及装置 - Google Patents

一种通信方法及装置 Download PDF

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Publication number
WO2022077876A1
WO2022077876A1 PCT/CN2021/085407 CN2021085407W WO2022077876A1 WO 2022077876 A1 WO2022077876 A1 WO 2022077876A1 CN 2021085407 W CN2021085407 W CN 2021085407W WO 2022077876 A1 WO2022077876 A1 WO 2022077876A1
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WIPO (PCT)
Prior art keywords
pdsch
time
dmrs
terminal
symbol
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PCT/CN2021/085407
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English (en)
French (fr)
Inventor
焦淑蓉
斯科尔托斯顿
巴希尔雷纳
李军
Original Assignee
华为技术有限公司
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Priority to CN202180068112.9A priority Critical patent/CN116349189A/zh
Publication of WO2022077876A1 publication Critical patent/WO2022077876A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • the present application relates to the field of communication technologies, and in particular, to a communication method and apparatus.
  • the existing protocol stipulates that the PDSCH demodulation reference signal (demodulation reference signal, DMRS) and the resources of the control resource set (control-resource set, CORESET) cannot overlap.
  • DMRS demodulation reference signal
  • CORESET control-resource set
  • the DMRS symbol needs to be moved backward. Because the terminal can only perform channel estimation after receiving the DMRS, and then can demodulate and decode the PDSCH according to the channel estimation result. Since the backward shift of the DMRS symbol shortens the available processing time of the terminal for the PDSCH, it is likely that the terminal cannot demodulate and decode the PDSCH in time, and thus cannot send hybrid automatic repeat request (HARQ) feedback information normally.
  • HARQ hybrid automatic repeat request
  • the present application provides a communication method and apparatus to avoid the failure to send HARQ feedback information normally due to the backward shift of the DMRS symbols.
  • a first aspect provides a communication method, the method can be executed by a terminal or a module in the terminal, the method includes: the terminal receives downlink control information DCI from a network device, where the DCI includes hybrid automatic retransmission
  • the HARQ feedback timing indication field is requested, and the HARQ feedback timing indication field indicates the time unit of the interval between the physical uplink control channel PUCCH and the physical downlink shared channel PDSCH scheduled by the DCI, wherein the PUCCH is used to carry the data of the PDSCH.
  • the terminal determines the back-shift distance of the DMRS under the condition that the time-frequency resources of the demodulation reference signal DMRS used to carry the PDSCH overlap with the time-frequency resources of the control resource set CORESET; At least one of the moving distance and the duration of the PDSCH, determine the first time parameter d3; the terminal determines the processing time T according to the first time parameter d3, and the processing time T includes the reception of the terminal from the PDSCH.
  • the time required to generate the corresponding HARQ feedback information under the condition that the first symbol of the PUCCH is not earlier than the earliest feedback symbol, the terminal sends the HARQ feedback information to the network device, wherein the earliest feedback symbol is based on The last symbol of the PDSCH is the symbol determined by the processing time T, and the HARQ feedback information is determined according to the decoding result of the PDSCH.
  • the above-mentioned time-frequency resources of the DMRS overlap with the time-frequency resources of the CORESET, which may specifically refer to the overlap of the time-frequency resources of the frontload DMRS and the time-frequency resources of the CORESET.
  • the overlapping may refer to full overlapping or partial overlapping, which is not limited.
  • the duration of the processing time T can be increased to a certain extent, thereby providing sufficient PDSCH processing time for the terminal before sending the HARQ feedback information, so that the HARQ feedback information can be normal. send.
  • the terminal does not send the HARQ feedback information or sends a negative acknowledgement (NACK).
  • NACK negative acknowledgement
  • the above-mentioned terminal equipment may also directly discard the DCI for scheduling the PDSCH under the above-mentioned conditions.
  • the value of the first time parameter d3 is 0.
  • the processing time T can also be calculated by setting the first time parameter d3 to 0, that is, without introducing a new time parameter, and continuing to use the original method.
  • the value of the first time parameter d3 is equal to the backward shift distance of the DMRS.
  • the terminal determines a first numerical value set from a plurality of numerical value sets according to the backward shift distance of the DMRS; and determines the first time parameter d3 according to the first numerical value set.
  • the value of the first time parameter d3 is equal to the first value in the first value set.
  • the preset set includes N values, where N is a positive integer, and N is less than or equal to the total number of PDSCH duration values specified by the protocol; or, the preset set The values in are all less than or equal to the second duration threshold.
  • the processing time T satisfies the following conditions:
  • T proc,1 (N 1 +d 1,1 +d 2 +d 3 )(2048+144) ⁇ 2 ⁇ ⁇ ⁇ T C +T ext
  • the T proc,1 represents the processing time T
  • the N 1 represents the processing time of the PDSCH determined according to the subcarrier spacing
  • the d 11 represents the physical The relaxation time introduced by the overlapping of the downlink control channel PDCCH and PDSCH
  • the d 2 represents the parameter introduced by considering the overlapping of the uplink channels of different priorities
  • the d 3 represents the first time parameter
  • the T C represents the time unit
  • the Text takes 1 in the operation of shared spectrum channel access, takes 0 in other scenarios
  • ⁇ is a constant 64
  • the u indicates the subcarrier spacing.
  • the processing time T satisfies the following conditions:
  • T proc,1 (N 1 +max(d 1,1 ,d 3 )+d 2 )(2048+144) ⁇ ⁇ 2 ⁇ ⁇ ⁇ T C +Text
  • the T proc,1 represents the processing time T
  • the N 1 represents the processing time of the PDSCH determined according to the subcarrier spacing
  • the d 11 represents the consideration of the PDCCH
  • the relaxation time introduced by the overlap with the PDSCH the d 2 represents the parameter introduced by considering the overlapping of uplink channels of different priorities
  • the d 3 represents the first time parameter
  • the T C represents the time unit
  • the T ext takes 1 in the operation of shared spectrum channel access, and takes 0 in other scenarios
  • ⁇ is represented as a constant 64
  • the u indicates the subcarrier spacing.
  • a communication method is provided.
  • the method can be executed by a terminal or a module in the terminal.
  • the method includes: the terminal receives downlink control information DCI from a network device, where the DCI includes hybrid automatic retransmission.
  • the HARQ feedback timing indication field is requested, and the HARQ feedback timing indication field indicates the time unit of the interval between the physical uplink control channel PUCCH and the physical downlink shared channel PDSCH scheduled by the DCI, wherein the PUCCH is used to carry the data of the PDSCH.
  • the time-frequency resources of the terminal for carrying the demodulation reference signal DMRS of the PDSCH overlap with the time-frequency resources of the control resource set CORESET, and the terminal supports processing capability 2 and the processing capability 2 is enabled Under the condition of , the processing time T is determined according to the parameter of the processing capability 1, and the processing time T includes the time required by the terminal to generate the corresponding HARQ feedback information from the reception of the PDSCH, wherein, in the same subcarrier interval and Under the DMRS configuration, the processing time T2 determined according to the processing capability 2 is less than the processing time T; the terminal sends HARQ feedback to the network device under the condition that the first symbol of the PUCCH is not earlier than the earliest feedback symbol information, 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 a decoding result of the PDSCH.
  • the processing time of the PDSCH of the terminal with processing capability 2 is shorter, when the DMRS is shifted backward, the impact on it is greater, and the resulting problem is more significant. Therefore, in this embodiment of the present application, when the DMRS is shifted back, the terminal falls back to processing capability 1 to determine the processing time of the PDSCH, which can increase the processing time of the PDSCH to a certain extent, so that the HARQ feedback information can be sent normally.
  • the terminal does not send the HARQ feedback information or sends a negative acknowledgement (NACK).
  • NACK negative acknowledgement
  • the terminal supports the processing capability 2 and the processing capability 2 is enabled, and the DMRS is a front-load DMRS; the backward shift position of the front-load DMRS is equal to or later than the protocol
  • the processing time T is determined according to the parameters in the processing capability 1 when the additional DMRS is configured under the condition of the specified location of the original additional DMRS.
  • a communication method is provided.
  • the method can be performed by a network device or by a module in the network device.
  • the method includes: the network device receives capability information from a terminal, the capability information indicating that the terminal supports or does not support the ability to move the DMRS symbols of the demodulation reference signal of the physical downlink shared channel PDSCH backward; the network device schedules the PDSCH according to the capability information, wherein when the terminal does not support the DMRS symbols of the PDSCH When the shift capability is enabled, the time-frequency resources used to carry the DMRS of the PDSCH do not overlap with the time-frequency resources of the control resource set CORESET.
  • the network device can perform adaptive scheduling for terminals with different capabilities, thereby ensuring the overall efficiency of the network.
  • a communication method is provided.
  • the method is performed by a terminal, and can also be performed by a module in the terminal, including: the terminal sends capability information to a network device, wherein the capability information indicates that the terminal supports or does not support physical The ability of the demodulation reference signal DMRS symbol of the downlink shared channel PDSCH to be shifted backward; the terminal receives the downlink control information DCI from the network device, the DCI is used to schedule the PDSCH, and the terminal does not support the DMRS of the PDSCH Under the condition of the capability of symbol backward shifting, the time-frequency resources of the DMRS of the PDSCH do not overlap with the time-frequency resources of the control resource set CORESET.
  • the terminal does not receive the PDSCH under the condition that the terminal does not support the ability to move the DMRS symbols of the PDSCH backward, and the time-frequency resources of the DMRS of the PDSCH overlap with the time-frequency resources of the CORESET.
  • the network device can perform adaptive scheduling for terminals with different capabilities, thereby ensuring the overall efficiency of the network.
  • a communication device in a fifth aspect, is provided, and the beneficial effects can be found in the description of the first aspect.
  • the communication device has the function of implementing the behavior in the method embodiment of the first aspect.
  • the functions can be performed by executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the communication apparatus 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, and the HARQ feedback timing indication field indicates the time unit of the interval between the physical uplink control channel PUCCH and the physical downlink shared channel PDSCH scheduled by the DCI, wherein the PUCCH is used to carry the HARQ feedback information of the PDSCH; the processing module is used to carry the HARQ feedback information of the PDSCH; Under the condition that the time-frequency resources of the demodulation reference signal DMRS of the PDSCH overlap with the time-frequency resources of the control resource set CORESET, the back-shift distance of the DMRS is determined, according to the back-shift distance of the DMRS and the duration of the PDSCH.
  • 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, and the HARQ feedback timing
  • At least one of the first time parameter d3 is determined, and according to the first time parameter d3, the processing time T is determined, and the processing time T includes the time required by the terminal to generate corresponding HARQ feedback information from the reception of the PDSCH; a transceiver module, further configured to send HARQ feedback information to the network device under the condition that the first symbol of the PUCCH is not earlier than the earliest feedback symbol, where the earliest feedback symbol is based on the last feedback symbol of the PDSCH The symbol and the symbol determined by the processing time T, the HARQ feedback information is determined according to the decoding result of the PDSCH.
  • These modules can perform the corresponding functions in the method examples of the first aspect. For details, please refer to the detailed descriptions in the method examples, which will not be repeated here.
  • a communication device in a sixth aspect, is provided, and the beneficial effects can be found in the description of the second aspect.
  • the communication device has the function of implementing the behavior in the method embodiment of the second aspect.
  • the functions can be performed by executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the communication apparatus 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, and the HARQ feedback timing indication field indicates the time unit of the interval between the physical uplink control channel PUCCH and the physical downlink shared channel PDSCH scheduled by the DCI, wherein the PUCCH is used to carry the HARQ feedback information of the PDSCH; the processing module is used to carry the HARQ feedback information of the PDSCH;
  • the time-frequency resources of the PDSCH demodulation reference signal DMRS overlap with the time-frequency resources of the control resource set CORESET, and the terminal supports processing capability 2 and the processing capability 2 is enabled, according to the processing capability 1.
  • the processing time T includes the time required by the terminal to generate the corresponding HARQ feedback information from the reception of the PDSCH, wherein, under the same subcarrier spacing and DMRS configuration, according to the processing capability 2.
  • the determined processing time T2 is less than the processing time T; the transceiver module is further configured to send HARQ feedback information to the network device 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 a decoding result of the PDSCH.
  • a communication device in a seventh aspect, is provided, and the beneficial effects can be found in the description of the third aspect.
  • the communication device has the function of implementing the behavior in the method embodiment of the third aspect.
  • the functions can be performed by executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the communication apparatus includes: a transceiver module configured to receive capability information from a terminal, where the capability information indicates that the terminal supports or does not support the physical downlink shared channel PDSCH after the demodulation reference signal DMRS symbol
  • the processing module is configured to schedule the PDSCH according to the capability information, wherein, when the terminal does not support the ability to move the DMRS symbols of the PDSCH backward, the DMRS for carrying the PDSCH
  • the time-frequency resources of the control resource set CORESET do not overlap with the time-frequency resources of the control resource set CORESET.
  • a communication device in an eighth aspect, is provided, and the beneficial effects can be found in the description of the fourth aspect.
  • the communication device has the function of implementing the behavior in the method embodiment of the fourth aspect.
  • the functions can be performed by executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the communication apparatus includes: a transceiver module, configured to send capability information to a network device, where the capability information indicates that the terminal supports or does not support the demodulation reference signal DMRS of the physical downlink shared channel PDSCH The ability to move the symbols backward; the transceiver module is further configured to receive the downlink control information DCI from the network device, the DCI is used to schedule the PDSCH, and the terminal does not support the ability to move the DMRS symbols of the PDSCH backward. Under the condition of , the time-frequency resources of the DMRS of the PDSCH do not overlap with the time-frequency resources of the control resource set CORESET.
  • These modules can perform the corresponding functions in the method example of the fourth aspect. For details, please refer to the detailed description in the method example, which will not be repeated here.
  • a communication device is provided, and the communication device may be the terminal in the above method embodiments, or a chip provided in the terminal.
  • the communication device includes a communication interface, a processor, and optionally, a memory.
  • the memory is used to store computer programs or instructions, and the processor is coupled to the memory and the communication interface, and when the processor executes the computer program or instructions, the communication device executes the method performed by the terminal in the above method embodiments.
  • a communication apparatus is provided, and the communication apparatus may be the network device in the above method embodiment, or a chip provided in the network device.
  • the communication device includes a communication interface, a processor, and optionally, a memory.
  • the memory is used to store computer programs or instructions, and the processor is coupled to the memory and the communication interface, and when the processor executes the computer program or instructions, the communication apparatus executes the method performed by the network device in the above method embodiments.
  • a computer program product comprising: computer program code, when the computer program code is executed, the method performed by the terminal in the above aspects is executed.
  • a twelfth aspect provides a computer program product, the computer program product comprising: computer program code, when the computer program code is executed, the method performed by the network device in the above aspects is performed.
  • the present application provides a chip system, where the chip system includes a processor for implementing the functions of the terminal in the methods of the above aspects.
  • the chip system further includes a memory for storing program instructions and/or data.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • the present application provides a chip system, where the chip system includes a processor for implementing the functions of the network device in the methods of the above aspects.
  • the chip system further includes a memory for storing program instructions and/or data.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • the present application provides a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and when the computer program is executed, the method executed by the terminal in the above aspects is implemented.
  • the present application provides a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and when the computer program is executed, the method performed by the network device in the above aspects is implemented.
  • Fig. 1 is a network architecture diagram in the application embodiment
  • 2a is a schematic diagram of PDSCH mapping of type A in an embodiment of the present application.
  • 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 overlapping PDSCH and CORESET in an embodiment of the application
  • Fig. 5, Fig. 6, Fig. 7 and Fig. 8 are the flowcharts in the embodiment of the 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.
  • FIG. 1 is a schematic diagram of a network architecture to which an embodiment of the present application is applied.
  • a terminal such as terminal 1301 or terminal 1302
  • the wireless network includes a radio access network (RAN) and a core network (CN), wherein the RAN is used to access the terminal to the wireless network, and the CN is used to manage the terminal and provide communication with the external network.
  • RAN radio access network
  • CN core network
  • the terminal, RAN and CN involved in FIG. 1 will be described in detail below.
  • a terminal includes a device that provides voice and/or data connectivity to a user, and may include, for example, a handheld device with 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 terminal equipment, user equipment (UE), mobile station, mobile terminal, and the like.
  • the terminal equipment can be mobile phone, tablet computer, computer with wireless transceiver function, virtual reality terminal equipment, augmented reality terminal equipment, wireless terminal in industrial control, vehicle wireless terminal, wireless terminal in remote surgery, wireless terminal in smart grid , wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, etc.
  • An on-board wireless terminal refers to a terminal device placed or installed in a vehicle, and may also be called an on-board unit (OBU).
  • the terminal device can also be a wearable device.
  • Wearable devices can also be called wearable smart devices or smart wearable devices. It is a general term for the intelligent design of daily wear and the development of wearable devices using wearable technology, such as glasses, gloves, watches, clothing and shoes.
  • the terminal device may also be other device capable of communicating with the network device, such as a relay device.
  • the embodiments of the present application do not limit the specific technology and specific device form adopted by the terminal device.
  • the RAN may include one or more RAN devices, such as RAN device 1101 and RAN device 1102 .
  • the interface between the RAN device and the terminal may be a Uu interface (or called an air interface).
  • Uu interface or called an air interface.
  • the names of these interfaces may remain unchanged, or may be replaced by other names.
  • a RAN device is a node or device that accesses a terminal to a wireless network, and the RAN device may also be referred to as a network device.
  • the network equipment can be a base station (base station), an evolved NodeB (eNodeB), a transmission reception point (TRP), a next generation NodeB (gNB) in the 5G mobile communication system, future mobile A base station in a communication system or an access node in a WiFi system, etc.; it can also be a module or unit that completes some functions of the base station, for example, it can be a centralized unit (central unit, CU) or a distributed unit (distributed unit) , DU).
  • the embodiments of the present application do not limit the specific technology and specific device form adopted by the network device.
  • One or more CN devices may be included in the CN.
  • the CN may include access and mobility management function (AMF) network elements, session management function (SMF) network elements, and user plane functions (user plane functions).
  • AMF access and mobility management function
  • SMF session management function
  • user plane functions user plane functions
  • UPF access and mobility management function
  • Policy control function policy control function
  • PCF policy control function
  • UDM unified data management
  • application function application function, AF network element
  • the number of each device in the communication system shown in FIG. 1 is only for illustration, and the embodiments of the present application are not limited to this. In practical applications, the communication system may also include more terminals, more RAN devices, and more Other devices may be included.
  • the network architecture shown in Figure 1 above can be applied to communication systems of various radio access technologies (RATs), such as long term evolution (LTE) communication systems, or 5G NR communication. system, it can also be in the future communication system.
  • RATs radio access technologies
  • LTE long term evolution
  • 5G NR 5G NR
  • the network architecture and service scenarios described in the embodiments of the present application are for the purpose of illustrating the technical solutions of the embodiments of the present application more clearly. Those skilled in the art know that with the evolution of the communication network architecture and the emergence of new service scenarios, the embodiments of the present application The technical solutions provided are also applicable to similar technical problems.
  • the time domain symbols may be orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) symbols, or may be discrete Fourier transform spread spectrum OFDM (Discrete Fourier Transform-spread-OFDM, DFT) symbols -s-OFDM) symbols.
  • OFDM orthogonal frequency division multiplexing
  • DFT discrete Fourier Transform-spread-OFDM
  • the symbols in the embodiments of the present application all refer to time-domain symbols.
  • a physical downlink shared channel (PDSCH), a physical downlink control channel (PDCCH), a physical uplink control channel (physical uplink control channel, PUCCH)
  • PDSCH physical downlink shared channel
  • PUCCH physical uplink control channel
  • the physical uplink shared channel (PUSCH) is only an example of the downlink data channel, downlink control channel, uplink control channel and uplink data channel.
  • the data channel and control channel may be There are different names.
  • the function of the network device may also be performed by a module (eg, a chip) in the network device, or may be performed by a control subsystem including the function of the base station.
  • the control subsystem including the base station function here can be a control center in industrial IoT application scenarios such as smart grid, factory automation, and intelligent transportation.
  • the functions of the terminal device may also be performed by a module (eg, a chip) in the terminal device.
  • DCI downlink control information
  • DCI is carried on the PDCCH, and the DCI carried by the PDCCH that schedules the PDSCH contains two domains: frequency domain resource assignment and time domain resource assignment.
  • the UE determines a time-frequency resource block according to the information of these two fields, and the DMRS of PDSCH and PDSCH will be transmitted in this resource block.
  • mapping type A mapping type A
  • mapping type B mapping type B
  • the two types of PDSCH have different start symbols S and continuous symbols L, and the positions of the DMRSs are also different.
  • the starting symbol S of PDSCH of type A may be the first 4 symbols ⁇ 0, 1, 2, 3 ⁇ of a slot, and the number L of persistent symbols of PDSCH may be ⁇ 3,..., 14 ⁇ et al.
  • the starting symbol S may be the first 13 symbols ⁇ 0, .
  • the above description takes the symbol of the common cyclic prefix as an example, and the symbols of the extended cyclic prefix are similar to them, and will not be repeated.
  • the start symbol S is 2, and the number L of continuous symbols is 11.
  • the start symbol is 4, and the number of continuous symbols is 2; or the start symbol is 8, and the number of continuous symbols is 4.
  • some resources that cannot be used to transmit PDSCH are defined. If these resources overlap with the PDSCH time-frequency resources scheduled by the DCI, the overlapping resources cannot be used for PDSCH transmission.
  • the protocol stipulates that the UE does not expect the DMRS of the PDSCH and the resources that cannot be used to transmit the PDSCH to overlap.
  • resources that cannot be used to transmit PDSCH There are three main types of resources that cannot be used to transmit PDSCH:
  • resource block resource block, RB
  • symbol symbol level resources
  • the embodiments of the present application mainly involve CORESET resources in the resources at the RB symbol level, which will be mainly introduced in the following embodiments.
  • the time-frequency resources for wireless communication between the base station and the terminal can be divided into two parts, namely the control area and the data area.
  • the control area includes one or more CORESETs, and each control resource set may include one or more CORESETs.
  • CCEs control-channel elements
  • the base station can map one PDCCH to one or more CCEs for transmission. Therefore, CORESET is specifically a block of time-frequency resources in the control region.
  • the DMRS of PDSCH mainly include two types, namely front-loaded DMRS and additional DMRS.
  • front-load DMRS for the PDSCH of type B, its original position is always on the first symbol or the first two symbols of the PDSCH; for the additional DMRS, only when the time domain length of the PDSCH is greater than or equal to 5 symbols.
  • the specific location is specified in the protocol, and the location of the additional DMRS in the PDSCH of different lengths is different. Since the channel changes rapidly with time, more DMRS are needed to ensure the channel estimation performance, and the additional DMRS is mainly used to improve the PDSCH reception performance in the high-speed channel.
  • the preload DMRS of the PDSCH overlaps the time-frequency resources of the CORESET, the preload DMRS and the additional DMRS need to be moved backward at the same time.
  • the NR protocol gives the following restrictions on the backward shift of DMRS:
  • the DMRS cannot be later than the second symbol
  • the preload DMRS cannot be later than the 4th symbol
  • the preload DMRS and the additional DMRS are located in the 1st symbol and the 5th symbol or moved to the 2nd symbol and the 6th symbol, otherwise the additional DMRS will not be sent.
  • the DMRS cannot be later than the L-1 th symbol.
  • the DMRS cannot be later than the 12th symbol of the slot (note that this is limited by the absolute position in the slot).
  • UE processing capability 1 UE processing capability 1
  • UE processing capability 2 UE processing capability 2
  • processing capability 1 and processing capability 2 respectively.
  • the PDSCH processing time specifically refers to the time required by the UE from receiving the PDSCH to generating its corresponding hybrid automatic repeat request (HARQ) feedback.
  • HARQ hybrid automatic repeat request
  • 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 the PDSCH processing time T proc,1 :
  • T proc,1 (N 1 +d 1,1 +d 2 )(2048+144) ⁇ ⁇ 2 ⁇ ⁇ T C +Text ;
  • the terminal when the terminal is designed, it must be able to receive the PDSCH and generate the corresponding HARQ within T proc,1 , so as to meet the strictest scheduling requirements.
  • the parameters in the above formula are described in detail below:
  • N1 is the PDSCH processing time specified by the protocol
  • Table 2 is defined for the terminal with PDSCH processing capability 1, the second column is suitable for the scenario where the front-load DMRS is configured and the additional DMRS is not configured, and the third column is suitable for the scenario where the front-load DMRS and the additional DMRS are configured at the same time;
  • Table 3 It is defined for a terminal with PDSCH processing capability 2, and additional DMRS is not allowed to be configured at this time.
  • the PDSCH processing time of processing capability 2 is less than the PDSCH processing time of processing capability 1.
  • u corresponds to different subcarrier spacing, 0 means 15kHz, 1 means 30kHz, 2 means 60kHz, and 3 means 120kHz. Since the whole process involves the PDSCH carrying downlink data, the PDCCH where the DCI that schedules the PDSCH is located, and the PUCCH or PUSCH where the HARQ corresponding to the PDSCH is located, and the subcarrier intervals of the downlink/uplink carriers where these channels are located may be different. In this case, u takes the subcarrier spacing that can maximize the value of T proc,1 .
  • Table 2 PDSCH processing time for processing capability 1
  • Table 3 PDSCH processing time for processing capability 2
  • d 1,1 is the relaxation of the processing time introduced by considering the overlap of PDCCH and PDSCH
  • the terminal since the terminal must first receive the PDCCH and decode and parse the DCI information carried on the PDCCH, it can know the location of the PDSCH and related physical layer parameters, and then the PDSCH can be demodulated and decoded. Affects the processing speed of PDSCH.
  • PDSCH of type B the values of d 1,1 are as follows:
  • d 1,1 takes the value 0;
  • d 1,1 is equal to the number of symbols that the PDSCH overlaps with the PDCCH that schedules the PDSCH.
  • d2 is a parameter introduced when the uplink channels of different priorities overlap, and has nothing to do with this design.
  • Text takes 1 in the operation of shared spectrum channel access, and takes 0 in other scenarios.
  • FIG. 4 illustrates several scenarios in which the DMRS is moved backward. For the sake of simplicity, only the influence of the front-loaded DMRS is considered.
  • the CORESET1 in FIG. 4 is the CORESET where the PDCCH1 corresponding to the PDSCH1 is located, and does not overlap with the PDSCH1, so d 1 and 1 in the processing time requirement are all set to zero.
  • the preload DMRS of PDSCH1 is moved from the first symbol of the PDSCH to the fourth symbol, because the UE must receive
  • the channel estimation can be performed only after the DMRS is obtained, and then the PDSCH1 can be demodulated and decoded by using the channel estimation value.
  • the backward shift of the front-load DMRS shortens the available processing time of the terminal for PDSCH, which may cause the UE to fail to demodulate and decode the PDSCH, or use a simplified algorithm to complete the PDSCH in a short time, thereby affecting the downlink reception performance.
  • Such processing time compression will have a greater impact on a terminal that has a processing time requirement that is inherently high in processing capability 2 .
  • the embodiments of the present application provide the following three solutions 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 shift of the DMRS.
  • the first solution a new time parameter d3 is introduced, and the time parameter d3 is involved in calculating the processing time of the PDSCH, thereby increasing the processing time of the PDSCH to a certain extent and ensuring the receiving performance of the terminal.
  • the second solution It can be seen from the comparison between Table 2 and Table 3 that for a terminal with capability 2, the PDSCH processing time is shorter. When the terminal is in processing capability 2, and when the DMRS backward shift occurs, the terminal can fall back to processing capability 1 to calculate the processing time of PDSCH, which increases the processing time of PDSCH.
  • the third solution design a new capability for the terminal, for example, the terminal can report to the network device whether it supports the capability of DMRS backward shift. If the terminal does not support it, the network device no longer schedules the time-frequency resource overlapping the DMRS of the PDSCH and the CORESET for the terminal.
  • the first embodiment is used to introduce the above-mentioned first solution.
  • the method includes: when the DMRS of the PDSCH overlaps the time-frequency resources of the CORESET, determining the back-shift distance of the DMRS; according to the back-shift distance of the DMRS and the duration of the PDSCH At least one of the first time parameter d3 is determined; the processing time of the PDSCH is determined according to the first time parameter d3.
  • the time-frequency resources of the DMRS overlap with the time-frequency resources of the CORESET, which may specifically refer to the overlap of the time-frequency resources of the frontload DMRS and the time-frequency resources of the CORESET.
  • Embodiment 2 is similar to Embodiment 3 and will not be further described.
  • the execution body of the above method may be a terminal or a network device.
  • the terminal may also be a module in the terminal, and the network device may be a module in the network device.
  • the PDSCH can be received, decoded, and corresponding HARQ feedback is generated within the processing time of the PDSCH or less.
  • the network device after determining the processing time of the PDSCH, it can 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.
  • the value of the first time parameter d3 can be any of the following:
  • the value of the first time parameter d3 is related to the backward distance of the DMRS
  • the value of the first time parameter d3 is equal to the backward shift distance of the DMRS. For example, if the backward shift distance of the DMRS is 2, the value of d3 is 2.
  • 1.2 Determine a first numerical value set from a plurality of numerical value sets according to the backward shift distance of the DMRS; determine the first time parameter d3 according to the first numerical value set. For example, according to a preconfigured condition, the value of the first time parameter d3 may be equal to the first value in the first value set.
  • the above-mentioned multiple value sets may be divided according to gears, and each gear corresponds to a numerical value set.
  • the above-mentioned X values of 1-X can be divided into Y gears in advance, and the Y gears can be respectively (1, x1-1 ), (x1, x2-1), (x2, x3-1), up to (X Y-1 , X). So:
  • the value of d3 is a value from 1 to x1-1, and the specific value of d3 from 1 to x1-1 can be specified by the protocol.
  • the value of d3 is a value from x1 to x2-1.
  • the specific value of x1 to x2-1 for d3 can be specified by the protocol. In other gears, the value of a is similar to that described above, and will not be repeated here.
  • the backward shift distance of the DMRS can be divided into a gear, that is, 1 to X is divided into a gear, and the value corresponding to d3 is one of 1 to X, and d3 is specifically 1 to X.
  • d3 is specifically 1 to X.
  • This solution is equivalent to: as long as the DMRS backward shift occurs, the value of d3 is Xs; otherwise, the value of d3 is 0.
  • last_pos_DMRSshift-last_pos_DMRSconfigured The value of the first time parameter d3 is the maximum value of the following two values: 0, last_pos_DMRSshift-last_pos_DMRSconfigured. It should be noted that the sign between the above variable “last_pos_DMRSshift” and the variable “last_pos_DMRSconfigured” is "minus", and the above “last_pos_DMRSshift-last_pos_DMRSconfigured” represents the difference between the two variables. Wherein, last_pos_DMRSshift refers to the OFDM symbol index where the last DMRS after the DMRS backshift operation is located, and last_pos_DMRSconfigured refers to the OFDM symbol index where the last DMRS configured according to the protocol preset or network configuration is located before the DMRS backshift operation.
  • last_pos_DMRSshift is the index of the OFDM symbol where the last preload DMRS is located after the back-shift operation
  • last_pos_DMRSconfigured is the The OFDM symbol index where the last additional DMRS of the configuration is obtained according to the protocol preset or network configuration before the DMRS shift operation.
  • the value of last_pos_DMRSshift-last_pos_DMRSconfigured may be a negative value, and the value of d3 is 0.
  • the duration of the PDSCH is a value in a preset set
  • the preset set satisfies at least one of the following conditions:
  • the preset set includes N values, where N is less than the total number of PDSCH duration values allowed by the protocol.
  • the PDSCH duration allowed by the protocol includes a total of 12 values of ⁇ 2, 3, . . . , 13 ⁇ , and the number of values N in the preset set is less than 12.
  • the values in the preset set are all less than or equal to the second duration threshold. For example, if the second duration threshold is 7, the values in the preset set are all less than or equal to 7.
  • the above information about "the PDSCH duration allowed by the protocol includes a total of 12 values of ⁇ 2, 3, ..., 13 ⁇ " or "the second duration threshold is 7", etc. value.
  • the processing time of the PDSCH is determined according to the first time parameter d3, and the following conditions may be satisfied:
  • T proc,1 (N 1 +d 1,1 +d 2 +d 3 )(2048+144) ⁇ 2 ⁇ ⁇ ⁇ T C +T ext
  • the T proc,1 represents the processing time of the PDSCH
  • the N 1 represents the processing time of the PDSCH determined according to the subcarrier spacing, the processing capability of the terminal, and whether the additional DMRS is configured, see Table 2 or Table 3 above.
  • the d 11 represents the relaxation time introduced by the overlap of the PDCCH and the PDSCH
  • the d 2 represents the parameters introduced by considering the overlap of the uplink channels of different priorities
  • the d 3 represents the first time parameter
  • the T C represents the time unit
  • the Text is 1 in the operation of shared spectrum channel access, and 0 in other scenarios
  • ⁇ is a constant 46
  • the u indicates the subcarrier spacing.
  • T proc,1 (N 1 +max(d 1,1 ,d 3 )+d 2 )(2048+144) ⁇ ⁇ 2 ⁇ ⁇ ⁇ T C +Text
  • the CORESETs configured by the network device to the terminal device may be classified into two categories, one is the CORESET including the PDCCH where the PDSCH is scheduled, and the other is other CORESETs.
  • the scenario where the time-frequency resources of PDCCH and PDSCH overlap is a sub-scenario of the scenario where the time-frequency resources of CORESET and PDSCH overlap, that is, when the time-frequency resources of PDCCH and PDSCH overlap, the time-frequency resources of CORESET and PDSCH will inevitably overlap. Therefore, when considering the impact on the PDSCH processing time, only the impact of the DMRS backward shift caused by CORESET on the PDSCH processing time may be considered.
  • the above-mentioned determination of the processing time of the PDSCH according to the first time parameter d3 may satisfy the following conditions:
  • T proc,1 (N 1 +d 3 +d 2 )(2048+144) ⁇ 2 ⁇ ⁇ ⁇ T C +T ext
  • d3 in the above formula is only an indication, and can also be replaced by d1, 1 in practical applications. It only needs to be explained that when the DMRS shift caused by CORESET occurs, the value of d1, 1 is based on the DMRS. The moving distance is determined, and the specific determination method can refer to the descriptions of the above cases 1 and 2.
  • the solution of the above-mentioned Embodiment 1 can be applied to a terminal with processing capability 1 or a terminal with processing capability 2. Since the original PDSCH processing time of the terminal with processing capability 2 is shorter, the impact caused by the DMRS backward shift is greater. By increasing the above-mentioned first time parameter d3, the improvement effect on the terminal with processing capability 2 is more obvious. If the above solution 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 frontload DMRS, it may also include additional DMRS.
  • the DMRS backward shift distance in the above-mentioned first embodiment may specifically refer to the backward shift distance of the front-loaded DMRS, or may specifically refer to the backward shift distance of the additional DMRS. If the above solution is applied to a terminal of processing capability 2, the corresponding PDSCH DMRS of the terminal of processing capability 2 only includes the frontload DMRS. Correspondingly, the DMRS backward shift distance in the above-mentioned first embodiment may specifically refer to the backward shift distance of the front-loaded DMRS.
  • a flow of a communication method is provided, which can be an example of the method in the above-mentioned Embodiment 1 being applied to a terminal.
  • the terminal is a UE and the network device is a base station as an example for description, which at least includes: :
  • Step 501 The UE receives DCI from the base station, the DCI includes a HARQ feedback timing indication field, and the HAQR feedback timing field indicates a time unit between PUCCH and PDSCH, and the PUCCH is used to carry HARQ feedback of PDSCH.
  • the time unit in this embodiment of the present application may be a radio frame, a subframe, a time slot, a micro-time frequency, a symbol, or the like.
  • the HARQ feedback timing indication field indicates k
  • the PUCCH used for carrying the HARQ feedback of the PDSCH is located in the time unit n+k.
  • the time unit that bears the PDSCH includes multiple time units, the last time unit of the PDSCH is used as the time unit n, and the k indicated by the HARQ feedback timing indication field is used to determine the location of the PUCCH for the HARQ feedback of the PDSCH.
  • the time unit is n+k.
  • the first time unit that bears the PUCCH is taken as the time unit n+k.
  • the last time unit of PDSCH refers to the time unit where the last OFDM symbol of PDSCH is located
  • the first time unit of PUCCH refers to the time unit where the first OFDM symbol of PUCCH is located.
  • Step 502 Under the condition that the time-frequency resources of the DMRS used to carry the PDSCH overlap with the time-frequency resources of the CORESET, determine the back-shift distance of the DMRS.
  • the time-frequency resources of the DMRS of the PDSCH and the time-frequency resources of the CORESET may be completely overlapped or partially overlapped.
  • the front-load DMRS of PDSCH1 is moved from the first symbol of the PDSCH to the fourth symbol, then the backward shift distance of the DMRS is 3 symbols.
  • Step 503 Determine the first time parameter d3 according to at least one of the back-shift distance of the DMRS and the duration of the PDSCH.
  • Step 504 Determine the processing time T according to the first time parameter d3.
  • the processing time T is the aforementioned PDSCH processing time.
  • the processing time T includes the time required by the UE from receiving the PDSCH to generating corresponding HARQ feedback information, and the above processing time T may also be understood as the maximum processing time of the PDSCH.
  • Step 505 Under the condition that the first symbol of the PUCCH is not earlier than the earliest feedback symbol, the UE sends HARQ feedback information to the base station, wherein the earliest feedback symbol is based on the last symbol of the PDSCH and the processing time T. The determined symbol, the HARQ feedback information is determined according to the decoding result of the PDSCH.
  • the above method further includes: under the condition that the first symbol of the PUCCH is earlier than the earliest feedback symbol, the UE may not send the HARQ feedback information, or the UE may send a negative acknowledgement (negative-acknowledgment) to the base station.
  • acknowledgment, NACK the NACK represents that the PDSCH has not had time to complete the decoding, or the UE may directly discard the DCI received in the above step 501, etc.
  • the UE when the first symbol of the PUCCH scheduled by the DCI is not earlier than the last feedback symbol, the UE sends the HARQ feedback information to the base station to ensure the UE's reception and feedback performance.
  • the processing time T of the UE can be increased, and the receiving and feedback performance of the UE can be further ensured.
  • the method in the first embodiment can be applied to a terminal with capability 1 or a terminal with capability 2.
  • a flow of a communication method is provided, and the flow can be the same as that of the foregoing embodiment.
  • the solution in 1 is applied to an example of a terminal of capability 2.
  • the terminal is a UE and the network device is a base station as an example for description.
  • the process at least includes:
  • Step 601 The UE reports to the base station whether it supports PDSCH processing capability 2.
  • the processing capability 1 is a basic capability and does not need to be reported. If the UE supports processing capability 2, it needs to be reported separately; if the UE does not support processing capability 2, there is no need to report, and the base station does not support it by default.
  • Step 602 The base station sends configuration information to the UE, where the configuration information includes whether to enable processing capability 2 and CORESET-related configuration parameters.
  • Step 603 The UE determines whether to enter the processing capability 2 according to the configuration information, and determines the time-frequency resource location of the CORESET.
  • Step 604 The base station sends the PDCCH1 to the UE on CORESET1, and sends the PDSCH1 corresponding to the DCI1 carried on the PDCCH1.
  • Step 605 The UE blindly detects PDCCH1 on CORESET1, and after receiving and parsing the information of DCI1 carried on PDCCH1, continues to receive PDSCH1 according to the information of DCI1, and determines the processing time of PDSCH.
  • the UE determines that it has entered the processing capability 2 according to the configuration information in the above step 603, and because the time-frequency resources of CORESET and PDSCH overlap, the front-load DMRS is shifted backward, then for the PDSCH processing time T proc,1 , the UE A new offset parameter d3 can be introduced, and the value of d3 can be referred to above.
  • T proc,1 and d3 please refer to the following formula:
  • T proc,1 (N 1 +d 1,1 +d 2 +d 3 )(2048+144) ⁇ ⁇ 2 ⁇ ⁇ ⁇ T C +Text ;
  • T proc,1 (N 1 +max(d 1,1 ,d 3 )+d 2 )(2048+144) ⁇ ⁇ 2 ⁇ ⁇ ⁇ TC+ Text ;
  • the requirement of downlink data processing time is adjusted for the backward shift of the DMRS, thereby ensuring that the user completes data reception within the specified time, ensuring the downlink throughput, and at the same time, the processing complexity of the user is not increased.
  • the second embodiment is used to introduce the second solution.
  • the method includes: when the DMRS of the PDSCH overlaps the time-frequency resources of the CORESET, and the terminal is in processing capability 2; the terminal falls back to processing capability 1, and determines the PDSCH processing time.
  • the execution body of the method may be a terminal or a network device. It can be understood that the terminal may also be a module in the terminal, and the network device may also be a module in the network device. After the terminal or the network device determines the processing time of the PDSCH, the subsequent processing process is similar to the first embodiment above.
  • the DMRS of its PDSCH only includes the frontload DMRS.
  • the backward shift position of the front-loaded DMRS is equal to or later than the position of the original additional DMRS specified in the protocol, it means that the backward shift of the DMRS is serious at this time.
  • the time parameter N1 of the additional DMRS is greater than the parameter N1 of the preloaded DMRS. Therefore, in the case of serious DMRS backward shift, when the terminal falls back to processing capability 1, the PDSCH may be determined specifically according to the time parameter of the additional DMRS configured in processing capability 1 (the time parameter may be N1). Therefore, the processing time of PDSCH is further increased and the receiving performance of the terminal is guaranteed.
  • a flow of a communication method is provided.
  • This flow is an example in which the solution in the above-mentioned Embodiment 2 is applied to a terminal.
  • the flow includes at least:
  • Step 701 The UE receives the DCI from the base station, the DCI includes a HARQ feedback timing indication field, and the HARQ feedback timing indication field indicates the time unit of the interval between the PUCCH and the PDSCH scheduled by the DCI, wherein the PUCCH uses for the HARQ feedback information carrying the PDSCH;
  • Step 702 Under the condition that the time-frequency resources of the DMRS used to carry the PDSCH overlap with the time-frequency resources of the CORESET, and the UE supports processing capability 2 and the processing capability 2 is enabled, according to the parameters of the processing capability 1, The processing time T is determined.
  • the processing time T is the aforementioned PDSCH processing time.
  • the processing time T includes the time required by the UE from the reception of the PDSCH to the generation of corresponding HARQ feedback information.
  • the processing time T2 determined according to the processing capability 2 is smaller than the processing time T.
  • Step 703 Under the condition that the first symbol of the PUCCH is not earlier than the earliest feedback symbol, the UE sends HARQ feedback information to the base station, and the earliest feedback symbol is based on the last symbol of the PDSCH and the processing time T. The determined symbol, the HARQ feedback information is determined according to the decoding result of the PDSCH.
  • the above method further includes: under the condition that the first symbol of the PUCCH is earlier than the earliest feedback symbol, the UE no longer sends the HARQ feedback information or sends a negative acknowledgement NACK to the base station, where the NACK indicates The demodulation and decoding of the PDSCH is not completed.
  • the UE directly discards the DCI in the above step 701 .
  • the above-mentioned UE determines the processing time T according to the parameters of processing capability 1, including: when the UE supports the processing capability 2 and the processing capability 2 is enabled, the DMRS is a preload DMRS;
  • the processing time T is determined according to the parameters in the processing capability 1 when the additional DMRS is configured under the condition that the backward position of the DMRS is equal to or later than the position of the original additional DMRS specified in the protocol.
  • a flow of a communication method is provided.
  • This flow is another example in which the method in the second embodiment above is applied to a terminal.
  • the flow at least includes:
  • Step 801 The UE reports to the base station whether it supports PDSCH processing capability 2.
  • the processing capability 1 is a basic capability and does not need to be reported. If the UE supports processing capability 2, it needs to be reported separately; if the UE does not support processing capability 2, there is no need to report, and the base station does not support it by default.
  • Step 802 The base station sends configuration information to the UE, where the configuration information includes whether to enable processing capability 2 and CORESET-related configuration parameters.
  • Step 803 The UE determines whether to enter the processing capability 2 according to the configuration information, and determines the time-frequency resource location of the CORESET.
  • Step 804 The base station sends the PDCCH1 to the UE on the CORESET1, and sends the PDSCH1 corresponding to the DCI1 carried on the PDCCH1.
  • Step 805 The UE blindly detects PDCCH1 on CORESET, and after receiving and parsing the information of DCI1 carried on PDCCH1, continues to receive PDSCH1 according to DCI1, and determines the processing time of PDSCH.
  • the UE determines that it is in capability processing 2 according to the above configuration information, and because the time-frequency resources of CORESET and PDSCH overlap, the preload DMRS is shifted backward, then it falls back to processing capability 1, and uses the relevant parameters of processing capability 1, Determine the processing time of PDSCH.
  • the value of the additional DMRS in the processing capability 1 can be used (specifically, the third column of the above Table 2 can be used. The value in ) determines the processing time of the PDSCH.
  • the processing time of the PDSCH of the terminal with processing capability 2 is shorter, when the DMRS is shifted backward, the impact on it is greater, and the resulting problem is more significant. Therefore, in the embodiment of the present application, when the DMRS is shifted back, the terminal falls back to processing capability 1 to determine the processing time of the PDSCH, which can increase the processing time of the PDSCH to a certain extent and ensure the receiving performance of the terminal.
  • the method includes: the network device receives capability information from the terminal, the capability information indicates that the terminal supports or does not support the capability of the DMRS symbol backward shift of the PDSCH; the network device according to The capability information is used to schedule the PDSCH; wherein, when the terminal does not support the ability to move the DMRS symbols of the PDSCH backward, the time-frequency resources used to carry the DMRS of the PDSCH and the time-frequency resources of the CORESET do not overlap.
  • the above-mentioned network device may also be a module in the network device, and the above-mentioned terminal may also be a module in the terminal.
  • the above method further includes: the terminal receives DCI from a network device, the DCI is used to schedule PDSCH, and under the condition that the terminal does not support the ability to move the DMRS symbols of the PDSCH backward, the DMRS of the PDSCH
  • the time-frequency resources of CORESET do not overlap with the time-frequency resources of CORESET.
  • the base station can perform the overlapping scheduling of the CORESET and the PDSCH; if the capability information reported by the terminal indicates that it does not support the DMRS symbols of the PDSCH If the capability of backward shift is used, the base station cannot perform the overlapping scheduling of CORESET and PDSCH.
  • the terminal may not receive the PDSCH, or the terminal may not feed back an acknowledgement (ACK), or the terminal always feeds back NACK.
  • ACK acknowledgement
  • the above method is described in detail by taking the terminal as the UE and the network device as the base station as an example:
  • a new UE capability may be introduced, which is the capability of the UE to support DMRS backward shift after CORESET overlaps with PDSCH.
  • the basic capability of the UE is that it does not support DMRS backward shift. If it supports DMRS backward shift, additional reporting is required.
  • the base station may perform CORESET and PDSCH overlapping scheduling.
  • the base station may not perform CORESET and PDSCH overlapping scheduling.
  • the above CORESET does not include the CORESET corresponding to the PDCCH that schedules the PDSCH. or,
  • the above new capability may be the capability that the UE does not support DMRS backward shift.
  • the basic capability of the UE is to support DMRS, and the new capability is a degraded capability that requires additional reporting.
  • the base station cannot perform the overlapping scheduling of CORESET and PDSCH.
  • the base station may perform scheduling in which CORESET and PDSCH overlap.
  • the base station can perform adaptive scheduling for UEs with different capabilities, which ensures the overall efficiency of the network.
  • FIG. 9 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • the communication device 900 includes a transceiver module 910 and a processing module 920 .
  • the communication device can be used to implement the functions related to the terminal in any of the above method embodiments.
  • 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 circuit included in the terminal, or a device including a terminal, such as various types of vehicles.
  • the communication apparatus may be used to implement the functions related to the network device in any of the foregoing method embodiments.
  • the communication apparatus may be a network device or a chip or circuit included in the network device.
  • the transceiver module 910 is configured to receive DCI from the network device, where the DCI includes: HARQ feedback timing indication field, the HARQ feedback timing indication field indicates the time unit of the interval between the PUCCH and the PDSCH scheduled by the DCI, wherein the PUCCH is used to carry the HARQ feedback information of the PDSCH; the processing module 920, using Under the condition that the time-frequency resources of the DMRS used to carry the PDSCH overlap with the time-frequency resources of the CORESET, the back-shift distance of the DMRS is determined, according to at least one of the back-shift distance of the DMRS and the duration of the PDSCH.
  • the DCI includes: HARQ feedback timing indication field, the HARQ feedback timing indication field indicates the time unit of the interval between the PUCCH and the PDSCH scheduled by the DCI, wherein the PUCCH is used to carry the HARQ feedback information of the PDSCH; the processing module 920, using Under the condition that the time-frequency resources of the DMRS
  • the transceiver module 910 is further configured to send HARQ feedback information to the network device under the condition that the first symbol of the PUCCH is not earlier than the earliest feedback symbol, where the earliest feedback symbol is the last symbol according to the PDSCH With the symbol determined by the processing time T, the HARQ feedback information is determined according to the decoding result of the PDSCH.
  • the above-mentioned transceiver module 910 is further configured to not send the HARQ feedback information or send a negative acknowledgement NACK under the condition that the first symbol of the PUCCH is earlier than the earliest feedback symbol.
  • the determining the first time parameter d3 according to the duration of the PDSCH includes: under the condition that the duration of the PDSCH is less than or equal to a duration threshold, the first time parameter The value of d3 is 0.
  • the determining the first time parameter d3 according to the back-shift distance of the DMRS and the duration of the PDSCH includes: under the condition that the duration of the PDSCH is greater than the duration threshold, according to the The first time parameter d3 is determined by the backward shift distance of the DMRS.
  • the determining the first time parameter d3 according to the backward shift distance of the DMRS includes: a value of the first time parameter d3 is equal to the backward shift distance of the DMRS.
  • the determining the first time parameter d3 according to the backward shift distance of the DMRS includes: according to the backward shift distance of the DMRS, determining a first numerical value set from a plurality of numerical value sets; The first time parameter d3 is determined according to the first value set.
  • the determining the first time parameter d3 according to the first numerical value set includes: according to a preconfigured condition, the value of the first time parameter d3 is equal to the value of the first numerical value set. first value.
  • the processing time T satisfies the following conditions:
  • T proc,1 (N 1 +d 1,1 +d 2 +d 3 )(2048+144) ⁇ 2 ⁇ ⁇ ⁇ T C +T ext
  • the T proc,1 represents the processing time T
  • the N 1 represents the processing time of the PDSCH determined according to the subcarrier spacing
  • the d 11 represents the physical The relaxation time introduced by the overlapping of the downlink control channel PDCCH and PDSCH
  • the d 2 represents the parameter introduced by considering the overlapping of the uplink channels of different priorities
  • the d 3 represents the first time parameter
  • the T C represents the time unit
  • the Text takes 1 in the operation of shared spectrum channel access, takes 0 in other scenarios
  • ⁇ is a constant 64
  • the u indicates the subcarrier spacing.
  • the processing time T satisfies the following conditions:
  • T proc,1 (N 1 +max(d 1,1 ,d 3 )+d 2 )(2048+144) ⁇ ⁇ 2 ⁇ ⁇ ⁇ T C +Text
  • the T proc,1 represents the processing time T
  • the N 1 represents the processing time of the PDSCH determined according to the subcarrier spacing
  • the d 11 represents the consideration of the PDCCH
  • the relaxation time introduced by the overlap with the PDSCH the d 2 represents the parameter introduced by considering the overlapping of uplink channels of different priorities
  • the d 3 represents the first time parameter
  • the T C represents the time unit
  • the T ext takes 1 in the operation of shared spectrum channel access, and takes 0 in other scenarios
  • ⁇ is represented as a constant 64
  • the u indicates the subcarrier spacing.
  • the transceiver module 910 is configured to receive DCI from the network device, where the DCI includes a HARQ feedback timing indication field, the HARQ feedback timing indication field indicates the time unit of the interval between the PUCCH and the PDSCH scheduled by the DCI, wherein the PUCCH is used to carry the HARQ feedback information of the PDSCH;
  • the transceiver module 910 is further configured to not send the HARQ feedback information or send a negative acknowledgement NACK under the condition that the first symbol of the PUCCH is earlier than the earliest feedback symbol.
  • the determining the processing time T according to the parameters of the processing capability 1 includes: the terminal supports the processing capability 2 and the processing capability 2 is enabled, and the DMRS is a front-loaded DMRS ; Under the condition that the backward shift position of the preload DMRS is equal to or later than the position of the original additional DMRS specified in the protocol, the processing time T is determined according to the parameters in the processing capability 1 when the additional DMRS is configured.
  • the transceiver module 910 is configured to receive capability information from the terminal, where the capability information indicates that the terminal supports or does not support the DMRS symbol of PDSCH to be shifted backwards
  • the processing module 920 is configured to schedule the PDSCH according to the capability information, wherein, when the terminal does not support the ability to move the DMRS symbols of the PDSCH backward, the DMRS for carrying the PDSCH
  • the time-frequency resources of CORESET do not overlap with the time-frequency resources of CORESET.
  • the transceiver module 910 is configured to send capability information to the network device, where the capability information indicates that the terminal supports or does not support DMRS symbols of PDSCH The ability to move backwards; the transceiver module 910 is further configured to receive DCI from the network device, where the DCI is used to schedule the PDSCH, under the condition that the terminal does not support the ability to move the DMRS symbols of the PDSCH backwards , the time-frequency resources of the DMRS of the PDSCH do not overlap with the time-frequency resources of the CORESET.
  • the terminal does not receive the PDSCH under the condition that the terminal does not support the ability to move the DMRS symbols of the PDSCH backward, and the time-frequency resources of the DMRS of the PDSCH overlap with the time-frequency resources of the CORESET.
  • the processing module 920 involved in the communication apparatus may be implemented by at least one processor or a processor-related circuit component, and the transceiver module 910 may be implemented by at least one transceiver or a transceiver-related circuit component or a communication interface.
  • the communication device may further include a storage module, which may be used 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, Thereby, the communication device can implement the corresponding method.
  • the memory module can be implemented, for example, by at least one memory.
  • the above-mentioned storage module, processing module, and transceiver module may exist separately, or all or part of the modules may be integrated, for example, the storage module and the processing module are integrated, or the processing module and the transceiver module are integrated.
  • FIG. 10 is another schematic structural diagram of a communication device provided in an embodiment of the present application.
  • the communication device may be a terminal, and the communication device may be used to implement the functions related to the terminal in any of the foregoing method embodiments.
  • the terminal takes a mobile phone as an example.
  • the terminal includes a processor, may also include a memory, and of course, may also include a radio frequency circuit, an antenna, an input and output device, and the like.
  • the processor is mainly used to process communication protocols and communication data, control terminals, execute software programs, and process data of software programs.
  • the memory is mainly used to store software programs and data.
  • the radio frequency circuit is mainly used for the conversion of the baseband signal and the radio frequency signal and the processing of the radio frequency signal.
  • Antennas are mainly used to send and receive radio frequency signals in the form of electromagnetic waves.
  • Input and output devices such as touch screens, display screens, and keyboards, are mainly used to receive data input by users and output data to users. It should be noted that some types of terminals may not have input and output devices.
  • the processor When data needs to be sent, the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the radio frequency circuit.
  • the radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal through the antenna in the form of electromagnetic waves.
  • the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, which converts the baseband signal into data and processes the data.
  • FIG. 10 only one memory and processor are 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 a storage device or the like.
  • the memory may be set independently of the processor, or may be integrated with the processor, which is not limited in this embodiment of the present application.
  • an antenna with a transceiver function and a radio frequency circuit may be regarded as a transceiver unit of the terminal, and a processor with a processing function may be regarded as a processing unit of the terminal.
  • the terminal includes a transceiver unit 1010 and a processing unit 1020 .
  • the transceiving unit may also be referred to as a transceiver, a transceiver, a transceiving device, or the like.
  • the processing unit may also be referred to as a processor, a processing single board, a processing module, a processing device, and the like.
  • the device for implementing the receiving function in the transceiver unit 1010 may be regarded as a receiving unit, and the device for implementing the transmitting function in the transceiver unit 1010 may be regarded as a transmitting unit, that is, the transceiver unit 1010 includes a receiving unit and a transmitting unit.
  • the transceiver unit may also sometimes be referred to as a transceiver, a transceiver, or a transceiver circuit.
  • the receiving unit may also sometimes be referred to as a receiver, receiver, or receiving circuit, or the like.
  • the transmitting unit may also sometimes be referred to as a transmitter, a transmitter, or a transmitting circuit, or the like.
  • the transceiving unit 1010 is configured to perform the sending and receiving operations on the terminal side in the above method embodiments
  • the processing unit 1020 is configured to perform other operations on the terminal except the transceiving operations in the above method embodiments.
  • FIG. 11 is another schematic structural diagram of a communication device provided in an embodiment of the present application.
  • the communication apparatus may specifically be a network device, such as a base station, for implementing the functions related to the network device in any of the foregoing method embodiments.
  • 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.
  • the DU 1101 is mainly used for the transceiver of radio frequency signals, the conversion of radio frequency signals and baseband signals, and part of baseband processing.
  • the CU 1102 may include at least one processor 11022 and at least one memory 11021.
  • the CU 1102 is mainly used to perform baseband processing, control the base station, and the like.
  • the CU 1102 is the control center of the base station, and may also be referred to as a processing unit.
  • the CU 1102 and the DU 1101 can communicate through an interface, wherein the control plane (CP) interface can be Fs-C, such as F1-C, the user plane (UP) interface can be Fs-U, Such as F1-U.
  • the DU 1101 and the CU 1102 may be physically set together, or may be physically separated (ie, distributed base stations), which is not limited.
  • the baseband processing on the CU and DU can be divided according to the protocol layers of the wireless network.
  • the functions of the PDCP layer and the above protocol layers are set in the CU, and the function settings of the protocol layers below the PDCP layer (such as the RLC layer and the MAC layer, etc.) are set. in DU.
  • the CU implements the functions of the radio resource control (radio resource control, RRC) layer and the packet data convergence protocol (PDCP) layer
  • the DU implements the radio link control (radio link control, RLC), media access Control (medium access control, MAC) and physical (physical, PHY) layer functions.
  • the network device 1100 may include one or more radio units (radio units, RU), one or more DUs and one or more CUs.
  • 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
  • the CU may include at least one processor 11022 and at least one memory 11021 .
  • the CU 1102 may be composed of one or more boards, and the multiple boards may jointly support a wireless access network (such as a 5G network) with a single access indication, or may support different access standards respectively wireless access network (such as LTE network, 5G network or other networks).
  • the memory 11021 and the processor 11022 may serve one or more single boards. That is to say, the memory and processor can be provided separately on each single board. It can also be that multiple boards share the same memory and processor. In addition, necessary circuits may also be provided on each single board.
  • the DU 1101 can be composed of one or more single boards, and multiple single boards can jointly support a wireless access network (such as a 5G network) with a single access indication, or can support a wireless access network with different access standards (such as a 5G network). Such as LTE network, 5G network or other network).
  • the memory 11014 and processor 11013 may serve one or more single boards. That is to say, the memory and processor can be provided separately on each single board. It can also be that multiple boards share the same memory and processor. In addition, necessary circuits may also be provided on each single board.
  • An embodiment of the present application further provides a chip system, including: a processor, where the processor is coupled with a memory, the memory is used to store a program or an instruction, and when the program or instruction is executed by the processor, the The chip system implements a method corresponding to a terminal or a method corresponding to a network device in any of the foregoing method embodiments.
  • the number of processors in the chip system may be one or more.
  • the processor can be implemented by hardware or by software.
  • the processor may be a logic circuit, an integrated circuit, or the like.
  • the processor may be a general-purpose processor implemented by reading software codes stored in memory.
  • the memory may be integrated with the processor, or may be provided separately from the processor, which is not limited in this application.
  • the memory can be a non-transitory processor, such as a read-only memory ROM, which can be integrated with the processor on the same chip, or can be provided on different chips.
  • the setting method of the processor is not particularly limited.
  • the system-on-chip may be a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), or a system on chip (SoC), It can also be a central processing unit (CPU), a network processor (NP), a digital signal processing circuit (DSP), or a microcontroller (microcontroller).
  • controller unit, MCU it can also be a programmable logic device (PLD) or other integrated chips.
  • each step in the foregoing method embodiment may be implemented by a hardware integrated logic circuit in a processor or an instruction in the form of software.
  • the method steps disclosed in conjunction with the embodiments of the present application may be directly embodied as being executed by a hardware processor, or executed by a combination of hardware and software modules in the processor.
  • Embodiments of the present application further provide a computer-readable storage medium, where computer-readable instructions are stored in the computer storage medium, and when the computer reads and executes the computer-readable instructions, the computer is made to execute any of the foregoing method embodiments method in .
  • Embodiments of the present application further provide a computer program product, which, when the computer reads and executes the computer program product, causes the computer to execute the method in any of the above method embodiments.
  • An embodiment of the present application further provides a communication system, where the communication system includes a terminal device.
  • the communication system may further include a network device.
  • the communication system may further include core network equipment.
  • processors mentioned in the embodiments of the present application may be a CPU, other general-purpose processors, DSP, ASIC, FPGA or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like.
  • a general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
  • the memory mentioned in the embodiments of the present application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory may be read-only memory (ROM), programmable read-only memory, erasable programmable read-only memory, electrically erasable programmable read-only memory, or flash memory.
  • Volatile memory may be random access memory (RAM), which acts as an external cache.
  • RAM random access memory
  • 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 Random Access Memory, Synchronous Attached Dynamic Random Access Memory, and Direct Memory Bus Random Access Memory.
  • the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components
  • the memory storage module
  • memory described herein is intended to include, but not be limited to, these and any other suitable types of memory.
  • the disclosed system, apparatus and method may be implemented in other manners.
  • the apparatus embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented.
  • the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.
  • the functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium.
  • the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution.
  • the computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage medium includes: a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk, and other media that can store program codes.

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Abstract

本申请实施例提供给了一种通信方法及装置，在用于承载PDSCH的DMRS的时频资源与CORESET的时频资源重叠的条件下，终端确定DMRS的后移距离，并根据DMRS的后移距离和PDSCH的持续时间中至少一个，确定第一时间参数d3，根据第一时间参数d3，确定处理时间T。在PUCCH的第一个符号不早于最早反馈符号的条件下，向网络设备发送HARQ反馈信息，最早反馈符号是根据PDSCH的最后一个符号与处理时间T确定的符号。采用本申请实施例的方法及装置，通过引入新的第一时间参数d3，在一定程度上增加处理时间T，为终端在发送HARQ反馈信息之前提供充足的PDSCH处理时间，使得HARQ反馈信息能够正常发送。

Description

一种通信方法及装置
相关申请的交叉引用
本申请要求在2020年10月16日提交中国专利局、申请号为PCT/CN2020/121698、申请名称为“一种通信方法及装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域，尤其涉及一种通信方法及装置。
背景技术
第五代(5 th generation，5G)移动通信系统中的新无线(new radio，NR)系统中，为了降低信道估计的复杂度，现有协议规定：PDSCH的解调参考信号(demodulation reference signal，DMRS)与控制资源集合(control-resource set，CORESET)的资源不能重叠。当PDSCH的DMRS符号与CORESET符号发生重叠时，需要将DMRS符号后移。由于终端必须在接收到DMRS之后才可以进行信道估计，然后才能根据信道估计结果对PDSCH进行解调和译码。由于DMRS符号的后移缩短了终端对于PDSCH的可用处理时间，很可能造成终端来不及解调和译码PDSCH，从而导致无法正常发送混合自动重传(hybrid automatic repeat request，HARQ)反馈信息。
发明内容
本申请提供一种通信方法及装置，以避免由于DMRS的符号后移，导致无法正常发送HARQ反馈信息。
第一方面，提供一种通信方法，该方法可以由终端执行，也可以由终端中的模块执行，该方法包括：终端接收来自网络设备的下行控制信息DCI，所述DCI中包括混合自动重传请求HARQ反馈定时指示字段，所述HARQ反馈定时指示字段指示物理上行控制信道PUCCH与所述DCI调度的物理下行共享信道PDSCH之间间隔的时间单元，其中，所述PUCCH用于承载所述PDSCH的HARQ反馈信息；终端在用于承载所述PDSCH的解调参考信号DMRS的时频资源与控制资源集合CORESET的时频资源重叠的条件下，确定DMRS的后移距离；终端根据所述DMRS的后移距离和所述PDSCH的持续时间中的至少一个，确定第一时间参数d3；终端根据所述第一时间参数d3，确定处理时间T，所述处理时间T包括所述终端从PDSCH的接收到生成对应的HARQ反馈信息所需的时间；终端在所述PUCCH的第一个符号不早于最早反馈符号的条件下，向所述网络设备发送HARQ反馈信息，其中，所述最早反馈符号是根据所述PDSCH的最后一个符号与所述处理时间T确定的符号，所述HARQ反馈信息是根据所述PDSCH的译码结果确定的。
上述DMRS的时频资源与CORESET的时频资源重叠，可具体指，前载DMRS的时频资源与CORESET的时频资源重叠。所述重叠可以指全部重叠，或部分重叠，不作限定。在上述方法中，通过引入新的第一时间参数d3，可在一种程度上增加处理时间T的时长， 从而为终端在发送HARQ反馈信息之前提供充足的PDSCH处理时间，使得HARQ反馈信息能够正常发送。
可选的，在所述PUCCH的第一个符号早于所述最早反馈符号的条件下，终端不发送所述HARQ反馈信息或发送否定应答NACK。
上述终端设备还可以在上述条件下，直接丢弃调度PDSCH的DCI。
在一种可能的设计中，在所述PDSCH的持续时间小于或等于持续时间门限的条件下，所述第一时间参数d3的取值为0。
通过上述方法，当PDSCH的持续时间较小时，由于DMRS无论怎么后移，都不可能移出PDSCH的范围，此时DMRS的后移距离也较小，由于DMRS后移所造成的影响也较小，此时也可以通过将第一时间参数d3置为0，也即不再引入新的时间参数，继续沿用原有的方式，计算处理时间T。
在一种可能的设计中，在所述PDSCH的持续时间大于持续时间门限的条件下或在所述PDSCH的持续时间为预设集合中的取值时，根据所述DMRS的后移距离确定所述第一时间参数d3。
可选的，所述第一时间参数d3的取值等于所述DMRS的后移距离。
可选的，终端根据所述DMRS的后移距离，从多个数值集合中，确定第一数值集合；根据所述第一数值集合，确定所述第一时间参数d3。
在一种可能的设计中，根据预配置的条件，所述第一时间参数d3的取值等于所述第一数值集合中的第一数值。
在一种可能的设计中，所述预设集合中包括N个值，所述N为正整数，且N小于或等于协议规定的PDSCH持续时间的取值的总数；或者，所述预设集合中的值均满足小于或等于第二持续时间门限。
在一种可能的设计中，所述处理时间T满足以下条件：
T proc,1＝(N 1+d 1,1+d 2+d 3)(2048+144)·κ2 -μ·T C+T ext
其中，所述T proc,1代表所述处理时间T，所述N 1表示根据子载波间隔、所述终端的处理能力以及是否配置附加DMRS确定的PDSCH的处理时间，所述d 11代表考虑物理下行控制信道PDCCH与PDSCH的重叠所引入的放松时间，所述d 2代表考虑不同优先级上行信道重叠所引入的参数，所述d 3代表所述第一时间参数，所述T C代表时间单位，所述T ext在共享频谱信道接入的操作中取1，其余场景取0，κ为常数64，所述u指示子载波间隔。
在另一种可能的设计中，所述处理时间T满足以下条件：
T proc,1＝(N 1+max(d 1,1,d 3)+d 2)(2048+144)·κ2 -μ·T C+T ext
其中，所述T proc,1代表所述处理时间T，所述N 1表示根据子载波间隔、所述终端的处理能力以及是否配置附加DMRS确定的PDSCH的处理时间，所述d 11代表考虑PDCCH与PDSCH的重叠所引入的放松时间，所述d 2代表考虑不同优先级上行信道重叠所引入的参数，所述d 3代表所述第一时间参数，所述T C代表时间单位，所述T ext在共享频谱信道接 入的操作中取1，其余场景取0，κ表示为常数64，所述u指示子载波间隔。
通过上述，主要考虑d11不为零的影响，综合d11和d3的取值，也可以避免将处理时间T的取值设置的过大，减少通信时延。
第二方面，提供一种通信方法，该方法可以由终端执行，也可以由终端中的模块执行，该方法包括：终端接收来自网络设备的下行控制信息DCI，所述DCI中包括混合自动重传请求HARQ反馈定时指示字段，所述HARQ反馈定时指示字段指示物理上行控制信道PUCCH与所述DCI调度的物理下行共享信道PDSCH之间间隔的时间单元，其中，所述PUCCH用于承载所述PDSCH的HARQ反馈信息；终端在用于承载所述PDSCH的解调参考信号DMRS的时频资源与控制资源集合CORESET的时频资源重叠，且所述终端支持处理能力2且所述处理能力2被使能的条件下，根据处理能力1的参数，确定处理时间T，所述处理时间T包括所述终端从PDSCH的接收到生成对应的HARQ反馈信息所需的时间，其中，在相同的子载波间隔和DMRS配置下，根据所述处理能力2确定的处理时间T2小于所述处理时间T；终端在所述PUCCH的第一个符号不早于最早反馈符号的条件下，向所述网络设备发送HARQ反馈信息，其中，所述最早反馈符号是根据所述PDSCH的最后一个符号与所述处理时间T确定的符号，所述HARQ反馈信息是根据所述PDSCH的译码结果确定的。
通过上述方法，由于处理能力2的终端其PDSCH的处理时间较短，当DMRS发生后移时，对其影响更大，产生的问题更显著。因此，在本申请实施例中，当DMRS发生后移后，终端回退到处理能力1，确定PDSCH的处理时间，在一定程度上可以增加PDSCH的处理时间，使得HARQ反馈信息能够正常发送。
可选的，在所述PUCCH的第一个符号早于所述最早反馈符号的条件下，终端不发送所述HARQ反馈信息或发送否定应答NACK。
在一种可能的设计中，所述终端支持所述处理能力2且所述处理能力2被使能，所述DMRS为前载DMRS；在所述前载DMRS的后移位置等于或晚于协议规定的原始附加DMRS的位置的条件下，根据配置了附加DMRS时所述处理能力1中的参数，确定所述处理时间T。
第三方面，提供一种通信方法，该方法可以由网络设备执行，也可以由网络设备中的模块执行，该方法包括：网络设备接收来自终端的能力信息，所述能力信息指示所述终端支持或不支持物理下行共享信道PDSCH的解调参考信号DMRS符号后移的能力；网络设备根据所述能力信息，对所述PDSCH进行调度，其中，当所述终端不支持所述PDSCH的DMRS符号后移的能力时，用于承载所述PDSCH的DMRS的时频资源与控制资源集合CORESET的时频资源不重叠。
通过上述方法，根据对终端进行能力区分，使得网络设备可以针对不同能力的终端进行适配的调度，保证了网络整体的效率。
第四方面，提供一种通信方法，该方法由终端执行，也可以由终端中的模块执行，包括：终端向网络设备发送能力信息，其中，所述能力信息指示所述终端支持或不支持物理下行共享信道PDSCH的解调参考信号DMRS符号后移的能力；终端接收来自所述网络设备的下行控制信息DCI，所述DCI用于调度所述PDSCH，在所述终端不支持所述PDSCH的DMRS符号后移的能力的条件下，所述PDSCH的DMRS的时频资源与控制资源集合CORESET的时频资源不重叠。
可选的，在所述终端不支持PDSCH的DMRS符号后移的能力，且所述PDSCH的DMRS的时频资源与所述CORESET的时频资源重叠的条件下，不接收所述PDSCH。
通过上述方法，根据对终端进行能力区分，使得网络设备可以针对不同能力的终端进行适配的调度，保证了网络整体的效率。
第五方面，提供一种通信装置，有益效果可参见第一方面的记载。所述通信装置具有实现上述第一方面的方法实施例中行为的功能。所述功能可以通过执行相应的软件。所述硬件或软件包括一个或多个与上述功能相应的模块。在一种可能设计中，所述通信装置包括：收发模块，用于接收来自网络设备的下行控制信息DCI，所述DCI中包括混合自动重传请求HARQ反馈定时指示字段，所述HARQ反馈定时指示字段指示物理上行控制信道PUCCH与所述DCI调度的物理下行共享信道PDSCH之间间隔的时间单元，其中，所述PUCCH用于承载所述PDSCH的HARQ反馈信息；处理模块，用于在用于承载所述PDSCH的解调参考信号DMRS的时频资源与控制资源集合CORESET的时频资源重叠的条件下，确定DMRS的后移距离，根据所述DMRS的后移距离和所述PDSCH的持续时间中的至少一个，确定第一时间参数d3，根据所述第一时间参数d3，确定处理时间T，所述处理时间T包括所述终端从PDSCH的接收到生成对应的HARQ反馈信息所需的时间；收发模块，还用于在所述PUCCH的第一个符号不早于最早反馈符号的条件下，向所述网络设备发送HARQ反馈信息，其中，所述最早反馈符号是根据所述PDSCH的最后一个符号与所述处理时间T确定的符号，所述HARQ反馈信息是根据所述PDSCH的译码结果确定的。这些模块可以执行上述第一方面方法示例中的相应功能，具体参见方法示例中的详细描述，此处不做赘述。
第六方面，提供一种通信装置，有益效果可参见第二方面的记载。所述通信装置具有实现上述第二方面的方法实施例中行为的功能。所述功能可以通过执行相应的软件。所述硬件或软件包括一个或多个与上述功能相应的模块。在一种可能设计中，所述通信装置包括：收发模块，用于接收来自网络设备的下行控制信息DCI，所述DCI中包括混合自动重传请求HARQ反馈定时指示字段，所述HARQ反馈定时指示字段指示物理上行控制信道PUCCH与所述DCI调度的物理下行共享信道PDSCH之间间隔的时间单元，其中，所述PUCCH用于承载所述PDSCH的HARQ反馈信息；处理模块，用于在用于承载所述PDSCH的解调参考信号DMRS的时频资源与控制资源集合CORESET的时频资源重叠，且所述终端支持处理能力2且所述处理能力2被使能的条件下，根据处理能力1的参数，确定处理时间T，所述处理时间T包括所述终端从PDSCH的接收到生成对应的HARQ反馈信息所需的时间，其中，在相同的子载波间隔和DMRS配置下，根据所述处理能力2确定的处理时间T2小于所述处理时间T；收发模块，还用于在所述PUCCH的第一个符号不早于最早反馈符号的条件下，向所述网络设备发送HARQ反馈信息，其中，所述最早反馈符号是根据所述PDSCH的最后一个符号与所述处理时间T确定的符号，所述HARQ反馈信息是根据所述PDSCH的译码结果确定的。这些模块可以执行上述第二方面方法示例中的相应功能，具体参见方法示例中的详细描述，此处不做赘述。
第七方面，提供一种通信装置，有益效果可参见第三方面的记载。所述通信装置具有实现上述第三方面的方法实施例中行为的功能。所述功能可以通过执行相应的软件。所述硬件或软件包括一个或多个与上述功能相应的模块。在一种可能设计中，所述通信装置包括：收发模块，用于接收来自终端的能力信息，所述能力信息指示所述终端支持或不支持 物理下行共享信道PDSCH的解调参考信号DMRS符号后移的能力；处理模块，用于根据所述能力信息，对所述PDSCH进行调度，其中，当所述终端不支持所述PDSCH的DMRS符号后移的能力时，用于承载所述PDSCH的DMRS的时频资源与控制资源集合CORESET的时频资源不重叠。这些模块可以执行上述第三方面方法示例中的相应功能，具体参见方法示例中的详细描述，此处不做赘述。
第八方面，提供一种通信装置，有益效果可参见第四方面的记载。所述通信装置具有实现上述第四方面的方法实施例中行为的功能。所述功能可以通过执行相应的软件。所述硬件或软件包括一个或多个与上述功能相应的模块。在一种可能设计中，所述通信装置包括：收发模块，用于向网络设备发送能力信息，其中，所述能力信息指示所述终端支持或不支持物理下行共享信道PDSCH的解调参考信号DMRS符号后移的能力；收发模块，还用于接收来自所述网络设备的下行控制信息DCI，所述DCI用于调度所述PDSCH，在所述终端不支持所述PDSCH的DMRS符号后移的能力的条件下，所述PDSCH的DMRS的时频资源与控制资源集合CORESET的时频资源不重叠。这些模块可以执行上述第四方面方法示例中的相应功能，具体参见方法示例中的详细描述，此处不做赘述。
第九方面，提供了一种通信装置，该通信装置可以为上述方法实施例中的终端，或者为设置在终端中的芯片。该通信装置包括通信接口以及处理器，可选的，还包括存储器。其中，该存储器用于存储计算机程序或指令，处理器与存储器、通信接口耦合，当处理器执行所述计算机程序或指令时，使通信装置执行上述方法实施例中由终端所执行的方法。
第十方面，提供了一种通信装置，该通信装置可以为上述方法实施例中的网络设备，或者为设置在网络设备中的芯片。该通信装置包括通信接口以及处理器，可选的，还包括存储器。其中，该存储器用于存储计算机程序或指令，处理器与存储器、通信接口耦合，当处理器执行所述计算机程序或指令时，使通信装置执行上述方法实施例中由网络设备所执行的方法。
第十一方面，提供了一种计算机程序产品，所述计算机程序产品包括：计算机程序代码，当所述计算机程序代码并运行时，使得上述各方面中由终端执行的方法被执行。
第十二方面，提供了一种计算机程序产品，所述计算机程序产品包括：计算机程序代码，当所述计算机程序代码被运行时，使得上述各方面中由网络设备执行的方法被执行。
第十三方面，本申请提供了一种芯片系统，该芯片系统包括处理器，用于实现上述各方面的方法中终端的功能。在一种可能的设计中，所述芯片系统还包括存储器，用于保存程序指令和/或数据。该芯片系统，可以由芯片构成，也可以包括芯片和其他分立器件。
第十四方面，本申请提供了一种芯片系统，该芯片系统包括处理器，用于实现上述各方面的方法中网络设备的功能。在一种可能的设计中，所述芯片系统还包括存储器，用于保存程序指令和/或数据。该芯片系统，可以由芯片构成，也可以包括芯片和其他分立器件。
第十五方面，本申请提供了一种计算机可读存储介质，该计算机可读存储介质存储有计算机程序，当该计算机程序被运行时，实现上述各方面中由终端执行的方法。
第十六方面，本申请提供了一种计算机可读存储介质，该计算机可读存储介质存储有计算机程序，当该计算机程序被运行时，实现上述各方面中由网络设备执行的方法。
附图说明
图1为申请实施例中的网络架构图；
图2a为本申请实施例中的类型A的PDSCH映射的示意图；
图2b为本申请实施例中的类型B的PDSCH映射的示意图；
图3为本申请实施例中的PDSCH处理时间的示意图；
图4为本申请实施例中的PDSCH与CORESET重叠的示意图；
图5、图6、图7和图8为本申请实施例中的流程图；
图9为本申请实施例中的通信装置的示意图；
图10为本申请实施例中的终端的示意图；
图11为本申请实施例中的网络设备的示意图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述。
图1为本申请实施例适用的一种网络架构示意图。如图1所示，终端(比如终端1301或终端1302)可接入到无线网络，以通过无线网络获取外网(例如因特网)的服务，或者通过无线网络与其它设备通信，如可以与其它终端通信。该无线网络包括无线接入网(radio access network，RAN)和核心网(core network，CN)，其中，RAN用于将终端接入到无线网络，CN用于对终端进行管理并提供与外网通信的网关。
下面分别对图1中所涉及的终端、RAN和CN进行详细说明。
一、终端
终端包括向用户提供语音和/或数据连通性的设备，例如可以包括具有无线连接功能的手持式设备、或连接到无线调制解调器的处理设备。该终端可以经RAN与核心网进行通信，与RAN交换语音和/或数据。终端也可以称为终端设备、用户设备(user equipment，UE)、移动台、移动终端等。终端设备可以是手机、平板电脑、带无线收发功能的电脑、虚拟现实终端设备、增强现实终端设备、工业控制中的无线终端、车载无线终端、远程手术中的无线终端、智能电网中的无线终端、运输安全中的无线终端、智慧城市中的无线终端、智慧家庭中的无线终端等等。车载无线终端是指放置在车辆内或安装在车辆内的终端设备，也可以称为车载单元(on-board unit，OBU)。终端设备还可以是可穿戴设备。可穿戴设备也可以称为穿戴式智能设备或智能穿戴式设备，是应用穿戴式技术对日常穿戴进行智能化设计、开发出可以穿戴的设备的总称，如眼镜、手套、手表、服饰及鞋等。终端设备还可以是能够与网络设备进行通信的其它设备，例如中继设备。本申请的实施例对终端设备所采用的具体技术和具体设备形态不做限定。
二、RAN
RAN中可以包括一个或多个RAN设备，比如RAN设备1101、RAN设备1102。RAN设备与终端之间的接口可以为Uu接口(或称为空口)。当然，在未来的通信系统中，这些接口的名称可以不变，或者也可以用其它名称代替。
RAN设备为将终端接入到无线网络的节点或设备，RAN设备又可以称为网络设备。网络设备可以是基站(base station)、演进型基站(evolved NodeB，eNodeB)、发送接收点(transmission reception point，TRP)、5G移动通信系统中的下一代基站(next generation NodeB，gNB)、未来移动通信系统中的基站或WiFi系统中的接入节点等；也可以是完成基站部分功能的模块或单元，例如，可以是集中式单元(central unit，CU)，也可以是分布 式单元(distributed unit，DU)。本申请的实施例对网络设备所采用的具体技术和具体设备形态不做限定。
三、CN
CN中可以包括一个或多个CN设备，比如，CN设备120。以5G通信系统为例，CN中可以包括接入和移动性管理功能(access and mobility management function，AMF)网元、会话管理功能(session management function，SMF)网元、用户面功能(user plane function，UPF)网元、策略控制功能(policy control function，PCF)网元、统一数据管理(unified data management，UDM)网元、应用功能(application function，AF)网元等。
应理解，图1所示的通信系统中各个设备的数量仅作为示意，本申请实施例并不限于此，实际应用中在通信系统中还可以包括更多的终端、更多的RAN设备，还可以包括其它设备。
上述图1所示意的网络架构可以适用于各种无线接入技术(radio access technology，RAT)的通信系统中，例如可以是长期演进(long term evolution，LTE)通信系统，也可以是5G NR通信系统，也可以是未来的通信系统中。本申请实施例描述的网络架构以及业务场景是为了更加清楚的说明本申请实施例的技术方案，本领域普通技术人员可知，随着通信网络架构的演变和新业务场景的出现，本申请实施例提供的技术方案对于类似的技术问题，同样适用。
在本申请的实施例中，时域符号可以是正交频分复用(orthogonal frequency division multiplexing，OFDM)符号，也可以是离散傅里叶变换扩频OFDM(Discrete Fourier Transform-spread-OFDM，DFT-s-OFDM)符号。如果没有特别说明，本申请实施例中的符号均指时域符号。
可以理解的是，本申请的实施例中，物理下行共享信道(physical downlink shared channel，PDSCH)、物理下行控制信道(physical downlink control channel，PDCCH)、物理上行控制信道(physical uplink control channel，PUCCH)和物理上行共享信道(physical uplink shared channel，PUSCH)只是作为下行数据信道、下行控制信道、上行控制信道和上行数据信道一种举例，在不同的系统和不同的场景中，数据信道和控制信道可能有不同的名称。
在本申请的实施例中，网络设备的功能也可以由网络设备中的模块(如芯片)来执行，也可以由包含有基站功能的控制子系统来执行。这里的包含有基站功能的控制子系统可以是智能电网、工厂自动化以及智能交通等工业物联网应用场景中的控制中心。终端设备的功能也可以由终端设备中的模块(如芯片)来执行。
下面先对本申请实施例所涉及的相关技术特征进行解释说明。
一、下行控制信息(downlink control informatioin，DCI)中的PDSCH资源指示
在NR中，PDCCH上承载DCI,调度PDSCH的PDCCH承载的DCI中包含两个域：频域资源分配(frequency domain resource assignment)和时域资源分配(time domain resource assignment)。UE根据这两个域的信息确定一个时频资源块，PDSCH和PDSCH的DMRS会在这个资源块内传输。
二、PDSCH时域映射方式
在NR中，PDSCH有两种映射方式，分别为：映射类型A(mapping type A)和 映射类型B(mapping type B)。两种类型的PDSCH的起始符号S和持续符号个数L不同，DMRS的位置也不同。
如表1所示，对于类型A的PDSCH的起始符号S可以是一个时隙的前4个符号{0,1,2,3}，PDSCH的持续符号个数L可以是{3,…,14}等。对于类型B的PDSCH的起始符号S可以是一个时隙的前13个符号{0,…,12}，PDSCH的持续符号个数L可以是{2,4,7}等。当然，上述描述是以普通循环前缀的符号为例进行说明的，对于扩展循环前缀的符号与之相似不再赘述。
表1
Figure PCTCN2021085407-appb-000001
如图2a所示，以类型A的PDSCH为例，起始符号S为2，持续符号个数L为11。如图2b所示，以类型B的PDSCH为例，起始符号是4，持续符号个数为2；或者起始符号是8，持续符号个数为4。
三、不能用来发送PDSCH的资源
NR中，定义了一些不能用来发送PDSCH的资源。如果这些资源和上述DCI调度的PDSCH时频资源有重叠，则重叠的资源不能用来传输PDSCH。
同时，为了降低信道估计的复杂性，协议规定：UE不期望PDSCH的DMRS和不能用来传输PDSCH的资源有重叠。不能用来传输PDSCH的资源，主要有以下3类：
1、资源块(resource block，RB)符号(symbol)级的资源
2、资源元素(resource element，RE)级的资源
3、SSB级的资源。
其中，本申请实施例中主要涉及RB符号级的资源中的CORESET资源，后面实施例中会重点介绍。
四、CORESET
在NR中，基站与终端进行无线通信的时频资源可分为两部分区域，分别为控制区域和数据区域，其中，控制区域中包括一个或多个CORESET，每个控制资源集合可包括一个或多个控制信道单元(control-channel element，CCE)，基站可将一个PDCCH映射至一个或多个CCE上进行发送。因此，CORESET具体为控制区域中的一块时频资源。
五、PDSCH中的DMRS
通过上述描述可以看出，DCI调度的PDSCH时域符号中，会有若干符号上承载用于信道估计的DMRS，从而可以根据信道估计结果进行PDSCH的解调和译码。
在NR中，PDSCH的DMRS主要包括两种，分别为前载(front-loaded)DMRS和附加(additional)DMRS。针对前载DMRS，对于类型B的PDSCH来说，其原始 位置始终位于该PDSCH的第一个符号或者前两个符号上；针对附加DMRS，只有当PDSCH的时域长度大于或等于5个符号时才存在，具体位置由协议中规定，不同长度的PDSCH中的附加DMRS的位置不同。由于信道随时间变化快，需要更多的DMRS来保证信道估计性能，附加DMRS主要用于提升在高速信道下的PDSCH接收性能。
当PDSCH的前载DMRS与CORESET的时频资源重叠时，前载DMRS和附加DMRS需要同时往后移。NR协议中对于DMRS的后移给出了以下限制：
1、对于长度为2的PDSCH，DMRS不能晚于第2个符号；
2、对于长度为5的PDSCH，如果配置了一个附加DMRS，则附加DMRS不能晚于第5个符号；
3、对于长度为7的PDSCH(普通循环冗余前缀)或长度为6的PDSCH(扩展循环冗余前缀)，则
3.1、前载DMRS不能晚于第4个符号；
3.2、如果配置了一个附加DMRS，则前载DMRS和附加DMRS位于第1个符号和第5个符号或者挪到第2个符号和第6个符号，否则就不再发送附加DMRS。
4、对于其他长度为L的PDSCH，DMRS不能晚于第L-1个符号。
4.1、对于长度为12或13的PDSCH，DMRS不能晚于该时隙的第12个符号(注意这是以该时隙中的绝对位置为限制的)。
六、PDSCH的处理时间
NR中，针对PDSCH的处理时间定义了两种处理能力，分别为UE处理能力1(UE processing capability 1)和UE处理能力2(UE processing capability 2)，以下分别简称为处理能力1和处理能力2。PDSCH处理时间，具体指UE从接收PDSCH到生成其对应的混合自动重传请求(hybrid automatic repeat request，HARQ)反馈所需的时间。
如图3所示，具体来说，从PDSCH的最后一个符号结束到承载对应的HARQ的PUCCH的第一个符号之间的时间不小于PDSCH处理时间T proc,1：
T proc,1＝(N 1+d 1,1+d 2)(2048+144)·κ2 -μ·T C+T ext；
也就是说终端在设计时，必须可以在T proc,1内能够完成PDSCH的接收并生成对应的HARQ，才能应对最严格的调度要求。以下详细介绍上述公式中的各项参数：
1、N1为协议规定的PDSCH的处理时间
其中，表2是针对PDSCH处理能力1的终端定义的，第二列适用于配置前载DMRS且未配置附加DMRS的场景，第三列适用于同时配置前载DMRS和附加DMRS的场景；表3是针对PDSCH处理能力2的终端定义的，此时不允许配置附加DMRS。其中，在相同的子载波间隔和DMRS配置下，处理能力2的PDSCH处理时间小于处理能力1的PDSCH处理时间。
在表2或3中，u对应不同的子载波间隔，0表示15kHz，1表示30kHz，2表示60kHz，3表示120kHz。由于整个过程涉及到承载下行数据的PDSCH、调度该PDSCH的DCI所在的PDCCH、对应该PDSCH的HARQ所在的PUCCH或PUSCH，而这些信道所在的下行/上行载波的子载波间隔可能各不相同，这种情况下，u取其中能使得T proc,1 的值最大的子载波间隔。
表2：处理能力1的PDSCH处理时间
Figure PCTCN2021085407-appb-000002
表3：处理能力2的PDSCH处理时间
Figure PCTCN2021085407-appb-000003
2、d 1,1是考虑了PDCCH与PDSCH的重叠情况引入的处理时间的放松
其中，因为终端必须先接收PDCCH并译码解析出PDCCH上承载的DCI信息才可以知道PDSCH的位置以及相关的物理层参数，接着才可以对PDSCH进行解调和译码，所以两者的重叠会影响PDSCH的处理速度。针对类型B的PDSCH，d 1,1的取值如下：
(1)当PDSCH的符号数大于或等于7时，d 1,1取值为0；
(2)当PDSCH的符号数大于或等于3且小于或等于6时，d 1,1的取值等于PDSCH与调度该PDSCH的PDCCH重叠的符号数；
(3)当PDSCH的符号数等于2时，
第一，如果调度该PDSCH的PDCCH是处于3符号长度的CORESET上，且该CORESET与该PDSCH的起始符号相同，则d 1,1的取值为0；
第二，否则d 1,1等于PDSCH与调度该PDSCH的PDCCH重叠的符号数。
3、d2是考虑了不同优先级上行信道重叠时引入的参数，与本设计无关。
除上述之外，在上述公式中，Tc表示一个时间单位，例如，T c＝1/(Δf max·N f)；其中Δf max＝480·10 3Hz且N f＝4096；κ表示Ts和Tc之间的比值，取固定值κ＝T s/T c＝64。
T ext在共享频谱信道接入的操作中取1，其余场景取0。
由于在当前的方案中，PDSCH的处理时间中，并未考虑DMRS后移的影响。图4中示意出了DMRS后移的几种场景，为简便起见，仅考虑了前载DMRS的影响。图4中的CORESET1是PDSCH1对应的PDCCH1所在的CORESET，未与PDSCH1有重叠，所以关于处理时间要求中的d 1,1都取值为零。
可参见图4中的右上图，以7符号的PDSCH为例，由于CORESET 2与PDSCH1重叠，PDSCH1的前载DMRS从该PDSCH的第1个符号后移到了第4个符号，由于UE必须在接收了DMRS之后才可以进行信道估计，然后才能利用信道估计值对PDSCH1进行解调译码。前载DMRS的后移缩短了终端对于PDSCH的可用处理时间，很可能造成UE来不及解调译码PDSCH，或者是为了在较短时间内完成而采用简化算法从而影响下行接收性能。对于处理时间要求本来就很高的处理能力2的终端来说，这样的处理时间压缩带来的影响会更大。
基于上述，本申请实施例提供了以下三种方案，以避免由于DMRS的后移所引起的PDSCH的处理时间变短，影响终端的接收性能的问题。
第一种方案：引入一个新的时间参数d3，该时间参数d3参与计算PDSCH的处理时间，从而在一定程度上可以增加PDSCH的处理时间，保证终端的接收性能。
第二种方案：通过表2与表3对比可以看出，对于能力2的终端，其PDSCH处理时间更短。在终端处于处理能力2时，且在发生DMRS后移时，可使终端回退到处理能力1计算PDSCH的处理时间，增加了PDSCH的处理时间。
第三种方案：为终端设计一种新的能力，比如终端可以向网络设备上报自己否支持DMRS后移的能力。如果终端不支持，则网络设备不再为所述终端调度PDSCH的DMRS与CORESET重叠的时频资源。
实施例一
该实施例一用于介绍上述第一种方案，该方法包括：当PDSCH的DMRS与CORESET的时频资源重叠时，确定DMRS的后移距离；根据DMRS的后移距离和所述PDSCH的持续时间中的至少一个，确定第一时间参数d3；根据所述第一时间参数d3，确定所述PDSCH的处理时间。应当指出，在该本申请实施例的方案中，DMRS的时频资源与CORESET的时频资源重叠，可具体指：前载DMRS的时频资源与CORESET的时频资源重叠。对于下述实施例二与实施例三相似，不再额外说明。
上述方法的执行主体可以为终端，也可以为网络设备。可选的，终端也可以为终端中的模块，网络设备可以为网络设备中的模块。针对终端，确定PDSCH的处理时间后，可在小于或等所述PDSCH的处理时间内，对PDSCH进行接收，译码，且生成其对应的HARQ反馈。针对网络设备，确定上述PDSCH的处理时间后，可保证调度的PUCCH与所述PDSCH间的时间间隔大于或等于上述PDSCH的处理时间。
可选的，第一时间参数d3的取值可为以下任一种：
1：第一时间参数d3的取值与DMRS的后移距离有关
1.1：第一时间参数d3的取值等于所述DMRS的后移距离。比如，DMRS的后移距离为2，则d3的取值为2。
1.2：根据所述DMRS的后移距离，从多个数值集合中，确定第一数值集合；根据所述第一数值集合，确定所述第一时间参数d3。比如，根据预配置的条件，第一时间参数d3的取值可等于第一数值集合中的第一数值。示例的，上述多个数值集合可以是按档位划分的，每个档位对应一个数值集合。比如，DMRS的后移距离a的取值范围是1～X，则可将上述1-X共X个数值预先划分为Y个档位，该Y个档位可以分别为(1，x1-1)，(x1，x2-1)，(x2，x3-1)，直至(X Y-1，X)。那么：
当1<＝a<x1时，则d3的取值为1到x1-1中的一个值，关于d3具体取1至x1-1的哪个值可以由协议规定。
当x1<＝a<x2时，则d3的取值为x1到x2-1中的一个值，同理关于d3具体取x1至x2-1的具体哪个值可以由协议规定。在其它档位中，a的取值与前述相似，不再赘述。
在一种设计中，可以将DMRS的后移距离划分为一个档位，即将1～X划分为 一个档位，对应d3的取值为1到X中的一个值，关于d3具体取1至X的哪个值可以由协议规定，假设为Xs。该方案也就等价为：只要发生了DMRS后移，则d3取值为Xs，否则d3取值为0。
1.3：第一时间参数d3的取值为以下2个数值中的最大值：0，last_pos_DMRSshift-last_pos_DMRSconfigured。应当指出上述变量“last_pos_DMRSshift”与变量“last_pos_DMRSconfigured”间的符号为“减号”，上述“last_pos_DMRSshift-last_pos_DMRSconfigured”代表两个变量的差值。其中，last_pos_DMRSshift是指DMRS后移操作后的最后一个DMRS所在的OFDM符号索引，last_pos_DMRSconfigured是指DMRS后移操作前根据协议预设或网络配置得到的配置的最后一个DMRS所在的OFDM符号索引。当配置了附加DMRS时，如果附加DMRS后移出了PDSCH所在的符号范围后，附加DMRS将不再发送，此时last_pos_DMRSshift就是后移操作后的最后一个前载DMRS所在的OFDM符号的索引，last_pos_DMRSconfigured就是DMRS后移操作前根据协议预设或网络配置得到的配置的最后一个附加DMRS所在的OFDM符号索引，此时last_pos_DMRSshift-last_pos_DMRSconfigured的取值可能是负值，则d3取值为0。
2：第一时间参数d3的取值，与DMRS的后移距离和PDSCH的持续时间有关
2.1：在所述PDSCH的持续时间小于或等于持续时间门限的条件下时，所述第一时间参数d3的取值为0。
2.2：在所述PDSCH的持续时间大于所述持续时间门限的条件下，根据所述DMRS的后移距离确定所述第一时间参数d3。具体如何根据所述DMRS的后移距离确定第一时间参数d3可参见上述情况1的介绍。
2.3：在所述PDSCH的持续时间为预设集合中的取值时，根据所述DMRS的后移距离确定所述第一时间参数d3。所述预设集合满足如下条件中的至少一项：
1)所述预设集合中包括N个值，N小于协议允许的PDSCH持续时间的取值的总数。比如协议允许的PDSCH持续时间包括{2,3，……，13}共12个取值，则预设集合中的取值个数N小于12。
2)所述预设集合中的值均满足小于或等于第二持续时间门限，比如第二持续时间门限为7，则预设集合中的取值均小于7或等于7。
例如，预设集合可以为{5,6}，N＝2满足小于12，且集合中的值都小于7。
又例如，预设集合可以为{5}，N＝1满足小于12，且集合中的值都小于7。
需要说明的是，以上关于“协议允许的PDSCH持续时间包括{2,3，……，13}共12个值”或“第二持续时间门限为7”等仅为示意性说明，不限制其它取值。
关于具体如何根据所述DMRS的后移距离确定第一时间参数d3可参见上述情况1的说明。
可选的，在本申请实施例中，根据所述第一时间参数d3，确定PDSCH的处理时间，可满足以下条件：
T proc,1＝(N 1+d 1,1+d 2+d 3)(2048+144)·κ2 -μ·T C+T ext
其中，所述T proc,1代表所述PDSCH的处理时间，所述N 1表示根据子载波间隔、终端的处理能力以及是否配置附加DMRS确定的PDSCH的处理时间，可参见上述表2或表3中的介绍，所述d 11代表考PDCCH与PDSCH的重叠所引入的放松时间，所述d 2代表考虑不同优先级上行信道重叠所引入的参数，所述d 3代表所述第一时间参数，所述T C代表时间单位，所述T ext在共享频谱信道接入的操作中取1，其余场景取0，κ为常数46，所述u指示子载波间隔。
或者，考虑到如果与PDSCH时频资源重叠的CORESET中有该PDSCH对应的PDCCH所在的CORESET，即d 1,1不为零的场景。则PDCCH解析以及DMRS信道估计的影响也可以综合考虑。上述根据所述第一时间参数d3，确定PDSCH的处理时间，可满足以下条件：
T proc,1＝(N 1+max(d 1,1,d 3)+d 2)(2048+144)·κ2 -μ·T C+T ext
关于该公式中各参数的含义，可参见上述。
或者，网络设备配置给终端设备的CORESET可以分为两类，一类是包含了调度PDSCH的PDCCH所在的CORESET，另一类是其它CORESET。PDCCH与PDSCH的时频资源重叠这一场景是CORESET与PDSCH的时频资源重叠这一场景的子场景，即PDCCH与PDSCH的时频资源重叠时，必然导致CORESET与PDSCH的时频资源重叠。因此，在考虑对PDSCH处理时间影响时，可以仅考虑CORESET导致的DMRS后移对PDSCH处理时间的影响。上述根据所述第一时间参数d3，确定PDSCH的处理时间，可满足以下条件：
T proc,1＝(N 1+d 3+d 2)(2048+144)·κ2 -μ·T C+T ext
关于该公式中各参数的含义，可参见上述描述。
需要说明的是，上述公式中的d3仅仅是一种示意，在实际应用中也可以用d1,1代替，只需要说明当发生了CORESET导致的DMRS后移，d1,1的取值根据DMRS后移距离确定，具体确定方式可参见上述情况1和2的说明。
应当指出，上述实施例一的方案，可适用于处理能力1的终端，也可适用于处理能力2的终端。由于处理能力2的终端，其原本的PDSCH处理时间较短，DMRS后移所造成的影响更大，通过增加上述第一时间参数d3，对处理能力2的终端的改善效果更明显。如果上述方案应用于处理能力1的终端，由于处理能力1的终端其对应的PDSCH DMRS中至少包括前载DMRS，还可以包括附加DMRS。由于在目前的方案中，若发生DMRS后移，前载DMRS和附加DMRS同时移动，且两者的移动距离相同。对应的，上述实施例一中的DMRS后移距离可具体指前载DMRS的后移距离，也可以具体指附加DMRS的后移距离。如果上述方案应用于处理能力2的终端，由于处理能力2的终端其对应的PDSCH DMRS中仅包括前载DMRS。对应的，上述实施例一中的DMRS后移距离可具体指前载DMRS的后移距离。
如图5所示，提供一种通信方法的流程，该流程可以为上述实施例一中的方法应用于终端中的一种示例，以终端为UE，网络设备为基站为例进行描述，至少包括：
步骤501：UE接收来自基站的DCI，该DCI中包括HARQ反馈定时指示字段，所述HAQR反馈定时字段指示PUCCH与PDSCH之间间隔的时间单元，所述PUCCH用于承载PDSCH的HARQ反馈。可以理解的是，在本申请实施例中的时间单元可以为无线帧、子帧、时隙、微时频或符号等。
例如，当PDSCH位于时间单元n，HARQ反馈定时指示字段指示了k，则表示用于承载PDSCH的HARQ反馈的PUCCH位于时间单元n+k。进一步的，如果承载PDSCH的时间单元包括多个时间单元，则以PDSCH的最后一个时间单元为时间单元n，再结合HARQ反馈定时指示字段指示的k，确定用于承载PDSCH的HARQ反馈的PUCCH所在的时间单元为n+k。进一步的，如果承载PUCCH的时间单元包括多个时间单元，则以承载PUCCH的第一时间单元为时间单元n+k。其中，PDSCH的最后一个时间单元是指PDSCH的最后一个OFDM符号所在的时间单元，PUCCH的第一时间单元是指PUCCH的第一个OFDM符号所在的时间单元。
步骤502：在用于承载所述PDSCH的DMRS的时频资源与CORESET的时频资源重叠的条件下，确定DMRS的后移距离。可选的，上述PDSCH的DMRS的时频资源与CORESET的时频资源两者间可以为完全重叠或者部分重叠。
在一种示例中，如图4的右上图所示，由于CORESET2与PDSCH1重叠，PDSCH1的前载DMRS从该PDSCH的第1个符号后移到了第4个符号，则该DMRS的后移距离为3个符号。
步骤503：根据DMRS的后移距离和PDSCH的持续时间中的至少一个，确定第一时间参数d3。关于确定第一时间参数d3的过程，可参见该实施例一中的前述记载。
步骤504：根据第一时间参数d3，确定处理时间T。该处理时间T即为前述PDSCH的处理时间，关于根据第一时间参数d3，确定处理时间T的过程，可参见前述根据第一时间参数d3，确定PDSCH的处理时间的过程。所述处理时间T包括UE从PDSCH的接收到生成对应的HARQ反馈信息所需的时间，上述处理时间T还可以理解为是PDSCH的最大处理时间。
步骤505：在所述PUCCH的第一个符号不早于最早反馈符号的条件下，UE向基站发送HARQ反馈信息，其中，所述最早反馈符号是根据PDSCH的最后一个符号与所述处理时间T确定的符号，所述HARQ反馈信息是根据所述PDSCH的译码结果确定的。
可选的，上述方法还包括：在所述PUCCH的第一个符号早于上述最早反馈符号的条件下，则UE可以不发送所述HARQ反馈信息，或者UE可以向基站发送否定应答(negative-acknowledgment，NACK)，该NACK代表PDSCH还没有来得及完成译码，或者，UE可直接丢弃上述步骤501中接收到的DCI等。
通过上述方法，当DCI调度的PUCCH的第一个符号不早于最后反馈符号时，UE再向基站发送HARQ反馈信息，保证UE接收及反馈性能。同时，通过增加第一时间参数d3，可增加UE的处理时间T，进一步保证UE的接收及反馈性能。
通过前述记载可知，上述实施例一中的方法可以应用于能力1的终端，也可以应用于能力2的终端，如图6所示，提供一种通信方法的流程，该流程可以为上述实施例一中的方案应用于能力2的终端的示例，以终端为UE，网络设备为基站为例进行描述，该流程 至少包括：
步骤601：UE向基站上报其是否支持PDSCH处理能力2。
在一种可能的实现方式中，处理能力1为基本能力，无需上报。如果UE支持处理能力2，需单独上报；如果UE不支持处理能力2，则无需上报，且基站默认不支持。
步骤602：基站向UE发送配置信息，该配置信息包括是否开启处理能力2和CORESET相关配置参数。
步骤603：UE根据配置信息，确定是否进入处理能力2，以及确定CORESET的时频资源位置。
步骤604：基站在CORESET1上向UE发送PDCCH1，并发送承载在PDCCH1上的DCI1对应的PDSCH1。
步骤605：UE在CORESET1上盲检PDCCH1，在接收并解析出PDCCH1上承载的DCI1的信息后，根据DCI1的信息继续接收PDSCH1，确定PDSCH的处理时间。
其中，若UE根据上述步骤603的配置信息，确定自己进入处理能力2，且由于CORESET与PDSCH的时频资源重叠，前载DMRS发生了后移，则针对PDSCH的处理时间T proc,1，UE可以引入新的偏移参数d3，关于d3的取值可参见前述。关于PDSCH的处理时间T proc,1与d3的关系，可参见下述公式：
T proc,1＝(N 1+d 1,1+d 2+d 3)(2048+144)·κ2 -μ·T C+T ext；
进一步的，如果与PDSCH1重叠的CORESET中有该PDSCH1对应的PDCCH1所在的CORESET1，即d 1,1不为零的场景。也可以综合考虑PDCCH的解析与DMRS的信道估计的影响。关于PDSCH的处理时间T proc,1与d3的关系，可参见下述公式：
T proc,1＝(N 1+max(d 1,1,d 3)+d 2)(2048+144)·κ2 -μ·T C+T ext；
通过上述实施例中，针对DMRS的后移调整了下行数据处理时间的要求，从而可以保证用户在规定时间内完成数据接收，保证了下行的吞吐量，同时又不会增加用户的处理复杂度。
实施例二
该实施例二用于介绍第二种方案，该方法包括：当PDSCH的DMRS与CORESET的时频资源重叠，且终端处于处理能力2时；所述终端回退到处理能力1，确定所述PDSCH的处理时间。
该方法的执行主体可以为终端，或网络设备。可以理解的是，终端还可以为终端中的模块，网络设备还可以为网络设备中的模块。终端或网络设备确定上述PDSCH的处理时间后，后续处理过程，与上述实施例一相似。
可选的，由于当终端处于处理能力2时，其PDSCH的DMRS仅包括前载DMRS。当其前载DMRS的后移位置等于或晚于协议规定的原始附加DMRS的位置时，说明此时DMRS的后移较严重。可参见上述表2所示，针对处理能力1的终端，由于在相同的子载 波间隔下，附加DMRS的时间参数N1，大于其前载DMRS的参数N1。因此，在DMRS后移较严重的情况下，当终端回退到处理能力1时，可具体根据处理能力1中配置的附加DMRS的时间参数(所述时间参数可以为N1)，确定所述PDSCH的处理时间，从而进一步增加PDSCH的处理时间，保证终端的接收性能。
如图7所示，提供一种通信方法的流程，该流程为上述实施例二中的方案应用于终端的示例，以终端为UE，网络设备为基站为例，至少包括：
步骤701：UE接收来自基站的DCI，所述DCI中包括HARQ反馈定时指示字段，所述HARQ反馈定时指示字段指示PUCCH与所述DCI调度的PDSCH之间间隔的时间单元，其中，所述PUCCH用于承载所述PDSCH的HARQ反馈信息；
步骤702：在用于承载所述PDSCH的DMRS的时频资源与CORESET的时频资源重叠，且UE支持处理能力2且所述处理能力2被使能的条件下，根据处理能力1的参数，确定处理时间T。
处理时间T即前述的PDSCH处理时间。所述处理时间T包括UE从PDSCH的接收到生成对应的HARQ反馈信息所需的时间。其中，在相同的子载波间隔和DMRS配置下，根据所述处理能力2确定的处理时间T2小于所述处理时间T。
步骤703：在所述PUCCH的第一个符号不早于最早反馈符号的条件下，UE向基站发送HARQ反馈信息，所述最早反馈符号是根据所述PDSCH的最后一个符号与所述处理时间T确定的符号，所述HARQ反馈信息是根据所述PDSCH的译码结果确定的。
可选的，上述方法还包括：在所述PUCCH的第一个符号早于所述最早反馈符号的条件下，UE不再向基站发送所述HARQ反馈信息或发送否定应答NACK，所述NACK表示所述PDSCH的解调和译码没有完成。或者，UE直接丢弃上述步骤701中的DCI。
示例的，上述UE根据处理能力1的参数，确定处理时间T，包括：当UE支持所述处理能力2且所述处理能力2被使能，所述DMRS为前载DMRS；在所述前载DMRS的后移位置等于或晚于协议规定的原始附加DMRS的位置的条件下，根据配置了附加DMRS时所述处理能力1中的参数，确定所述处理时间T。
如图8所示，提供一种通信方法的流程，该流程为上述实施例二中的方法应用于终端的另一示例，以终端为UE，网络设备为基站为例，该流程至少包括：
步骤801：UE向基站上报其是否支持PDSCH处理能力2。
在一种可能的实现方式中，处理能力1为基本能力，无需上报。如果UE支持处理能力2，需单独上报；如果UE不支持处理能力2，则无需上报，基站默认不支持。
步骤802：基站向UE发送配置信息，该配置信息包括是否开启处理能力2和CORESET相关配置参数。
步骤803：UE根据配置信息，确定是否进入处理能力2，以及确定CORESET的时频资源位置。
步骤804：基站在CORESET1上向UE发送PDCCH1，并发送承载在PDCCH1上的DCI1对应的PDSCH1。
步骤805：UE在CORESET上盲检PDCCH1，在接收并解析出PDCCH1上承载的DCI1的信息后，根据DCI1继续接收PDSCH1，确定PDSCH的处理时间。
其中，如果UE根据上述配置信息，确定处于能力处理2，且由于CORESET与PDSCH的时频资源重叠，前载DMRS发生了后移，则回退到处理能力1，利用处理能力1的相关 参数，确定PDSCH的处理时间。
可选的，当前载DMRS后移到的位置已经等于或晚于原始协议规定中的附加DMRS的位置，则可以采用处理能力1中的附加DMRS的数值(可具体为上述表2的第三列中的数值)确定PDSCH的处理时间。
通过上述方法，由于处理能力2的终端其PDSCH的处理时间较短，当DMRS发生后移时，对其影响更大，产生的问题更显著。因此，在本申请实施例中，当DMRS发生后移后，终端回退到处理能力1，确定PDSCH的处理时间，在一定程度上可以增加PDSCH的处理时间，保证终端的接收性能。
实施例三
该实施例三介绍上述第三种方案，该方法包括：网络设备接收来自终端的能力信息，所述能力信息指示所述终端支持或不支持PDSCH的DMRS符号后移的能力；所述网络设备根据所述能力信息，对所述PDSCH进行调度；其中，当所述终端不支持所述PDSCH的DMRS符号后移的能力时，用于承载所述PDSCH的DMRS的时频资源与CORESET的时频资源不重叠。上述网络设备还可以为网络设备中的模块，上述终端还可以为终端中的模块。
可选的，上述方法还包括：终端接收来自网络设备的DCI，所述DCI用于调度PDSCH，在所述终端不支持所述PDSCH的DMRS符号后移的能力的条件下，所述PDSCH的DMRS的时频资源与CORESET的时频资源不重叠。
在本申请实施例中，若终端上报的能力信息指示其支持PDSCH的DMRS符号后移的能力，则基站可以进行CORESET与PDSCH重叠的调度；若终端上报的能力信息指示其不支持PDSCH的DMRS符号后移的能力，则基站不可以进行CORESET与PDSCH重叠的调度。此时，若基站调度的CORESET与PDSCH的时频资源依然重叠时，则终端可以不接收该PDSCH，或者，终端不反馈肯定应答(acknowledgement，ACK)，或者终端始终反馈NACK。
在以下实施例中，以终端为UE，网络设备为基站为例，详细介绍上述方法：
在一种可能的实现方式中，可以引入一种新的UE能力，该能力为UE支持CORESET与PDSCH重叠后DMRS后移的能力。UE的基本能力是不支持DMRS后移，若支持DMRS后移，需要额外上报。针对上报了该能力的UE，基站可以进行CORESET与PDSCH重叠的调度。针对未上报该能力的UE，基站不可以进行CORESET与PDSCH重叠的调度。可选的，上述CORESET不包括调度PDSCH的PDCCH对应的CORESET。或者，
上述新的能力，可以为UE不支持DMRS后移的能力。UE的基本能力是支持DMRS，而新能力是一种退化的能力，需要额外上报。针对上报了该能力的UE，基站不可以进行CORESET与PDSCH重叠的调度。针对未上报该能力的UE，基站可以进行CORESET与PDSCH重叠的调度。
在上述实施例中，根据对UE进行能力区分，使得基站可以针对不同能力的UE进行适配的调度，保证了网络整体的效率。
本申请实施例还提供一种通信装置，请参考图9，为本申请实施例提供的一种通信装置的结构示意图，该通信装置900包括：收发模块910和处理模块920。
该通信装置可用于实现上述任一方法实施例中涉及终端的功能。例如，该通信装置可 以是终端，例如手持终端或车载终端；该通信装置还可以是终端中包括的芯片或者电路，或者包括终端的装置，如各种类型的车辆等。
该通信装置可用于实现上述任一方法实施例中涉及网络设备的功能。例如，该通信装置可以是网络设备或网络设备中包括的芯片或电路。
示例性的，当该通信装置执行上述实施例一中图5中所示的方法实施例中对应终端的操作或者步骤时，收发模块910，用于接收来自网络设备的DCI，所述DCI中包括HARQ反馈定时指示字段，所述HARQ反馈定时指示字段指示PUCCH与所述DCI调度的PDSCH之间间隔的时间单元，其中，所述PUCCH用于承载所述PDSCH的HARQ反馈信息；处理模块920，用于在用于承载所述PDSCH的DMRS的时频资源与CORESET的时频资源重叠的条件下，确定DMRS的后移距离，根据所述DMRS的后移距离和所述PDSCH的持续时间中的至少一个，确定第一时间参数d3，根据所述第一时间参数d3，确定处理时间T，所述处理时间T包括所述终端从PDSCH的接收到生成对应的HARQ反馈信息所需的时间；收发模块910，还用于在所述PUCCH的第一个符号不早于最早反馈符号的条件下，向所述网络设备发送HARQ反馈信息，其中，所述最早反馈符号是根据所述PDSCH的最后一个符号与所述处理时间T确定的符号，所述HARQ反馈信息是根据所述PDSCH的译码结果确定的。
可选的，上述收发模块910，还用于：在所述PUCCH的第一个符号早于所述最早反馈符号的条件下，不发送所述HARQ反馈信息或发送否定应答NACK。
在一种可能的设计中，所述根据所述PDSCH的持续时间，确定第一时间参数d3，包括：在所述PDSCH的持续时间小于或等于持续时间门限的条件下，所述第一时间参数d3的取值为0。
在一种可能的设计中，所述根据所述DMRS的后移距离和PDSCH的持续时间，确定第一时间参数d3，包括：在所述PDSCH的持续时间大于持续时间门限的条件下，根据所述DMRS的后移距离确定所述第一时间参数d3。
在一种可能的设计中，所述根据所述DMRS的后移距离，确定第一时间参数d3，包括：所述第一时间参数d3的取值等于所述DMRS的后移距离。
在一种可能的设计中，所述根据所述DMRS的后移距离，确定第一时间参数d3，包括：根据所述DMRS的后移距离，从多个数值集合中，确定第一数值集合；根据所述第一数值集合，确定所述第一时间参数d3。
可选的，所述根据所述第一数值集合，确定所述第一时间参数d3，包括：根据预配置的条件，所述第一时间参数d3的取值等于所述第一数值集合中的第一数值。
在一种可能的设计中，所述处理时间T满足以下条件：
T proc,1＝(N 1+d 1,1+d 2+d 3)(2048+144)·κ2 -μ·T C+T ext
其中，所述T proc,1代表所述处理时间T，所述N 1表示根据子载波间隔、所述终端的处理能力以及是否配置附加DMRS确定的PDSCH的处理时间，所述d 11代表考虑物理下行控制信道PDCCH与PDSCH的重叠所引入的放松时间，所述d 2代表考虑不同优先级上行信道重叠所引入的参数，所述d 3代表所述第一时间参数，所述T C代表时间单位，所述T ext在共享频谱信道接入的操作中取1，其余场景取0，κ为常数64，所述u指示子载波间隔。
在另一种可能的设计中，所述处理时间T满足以下条件：
T proc,1＝(N 1+max(d 1,1,d 3)+d 2)(2048+144)·κ2 -μ·T C+T ext
其中，所述T proc,1代表所述处理时间T，所述N 1表示根据子载波间隔、所述终端的处理能力以及是否配置附加DMRS确定的PDSCH的处理时间，所述d 11代表考虑PDCCH与PDSCH的重叠所引入的放松时间，所述d 2代表考虑不同优先级上行信道重叠所引入的参数，所述d 3代表所述第一时间参数，所述T C代表时间单位，所述T ext在共享频谱信道接入的操作中取1，其余场景取0，κ表示为常数64，所述u指示子载波间隔。
当该通信装置执行上述实施例二中图7中所示的方法实施例中对应终端的操作或者步骤时，收发模块910，用于接收来自网络设备的DCI，所述DCI中包括HARQ反馈定时指示字段，所述HARQ反馈定时指示字段指示PUCCH与所述DCI调度的PDSCH之间间隔的时间单元，其中，所述PUCCH用于承载所述PDSCH的HARQ反馈信息；处理模块920，用于在用于承载所述PDSCH的DMRS的时频资源与CORESET的时频资源重叠，且所述终端支持处理能力2且所述处理能力2被使能的条件下，根据处理能力1的参数，确定处理时间T，所述处理时间T包括所述终端从PDSCH的接收到生成对应的HARQ反馈信息所需的时间，其中，在相同的子载波间隔和DMRS配置下，根据所述处理能力2确定的处理时间T2小于所述处理时间T；收发模块910，还用于在所述PUCCH的第一个符号不早于最早反馈符号的条件下，向所述网络设备发送HARQ反馈信息，其中，所述最早反馈符号是根据所述PDSCH的最后一个符号与所述处理时间T确定的符号，所述HARQ反馈信息是根据所述PDSCH的译码结果确定的。
可选的，收发模块910，还用于在所述PUCCH的第一个符号早于所述最早反馈符号的条件下，不发送所述HARQ反馈信息或发送否定应答NACK。
在一种可能的设计中，所述根据处理能力1的参数，确定处理时间T，包括：所述终端支持所述处理能力2且所述处理能力2被使能，所述DMRS为前载DMRS；在所述前载DMRS的后移位置等于或晚于协议规定的原始附加DMRS的位置的条件下，根据配置了附加DMRS时所述处理能力1中的参数，确定所述处理时间T。
当该通信装置执行上述实施例三中对应网络设备的操作或步骤时，收发模块910，用于接收来自终端的能力信息，所述能力信息指示所述终端支持或不支持PDSCH的DMRS符号后移的能力；处理模块920，用于根据所述能力信息，对所述PDSCH进行调度，其中，当所述终端不支持所述PDSCH的DMRS符号后移的能力时，用于承载所述PDSCH的DMRS的时频资源与CORESET的时频资源不重叠。
当该通信装置执行上述实施例三中对应终端设备的操作或步骤时，收发模块910，用于向网络设备发送能力信息，其中，所述能力信息指示所述终端支持或不支持PDSCH的DMRS符号后移的能力；收发模块910，还用于接收来自所述网络设备的DCI，所述DCI用于调度所述PDSCH，在所述终端不支持所述PDSCH的DMRS符号后移的能力的条件下，所述PDSCH的DMRS的时频资源与CORESET的时频资源不重叠。
可选的，在所述终端不支持PDSCH的DMRS符号后移的能力，且所述PDSCH的DMRS的时频资源与所述CORESET的时频资源重叠的条件下，不接收所述PDSCH。
该通信装置中涉及的处理模块920可以由至少一个处理器或处理器相关电路组件实现，收发模块910可以由至少一个收发器或收发器相关电路组件或通信接口实现。可选的，该 通信装置中还可以包括存储模块，该存储模块可以用于存储数据和/或指令，收发模块910和/或处理模块920可以读取存取模块中的数据和/或指令，从而使得通信装置实现相应的方法。该存储模块例如可以通过至少一个存储器实现。
上述存储模块、处理模块和收发模块可以分离存在，也可以全部或者部分模块集成，例如存储模块和处理模块集成，或者处理模块和收发模块集成等。
请参考图10，为本申请实施例中提供的一种通信装置的另一结构示意图。该通信装置具体可为一种终端，该通信装置可用于实现上述任一方法实施例中涉及终端的功能。便于理解和图示方便，在图10中，终端以手机作为例子。如图10所示，终端包括处理器，还可以包括存储器，当然，也还可以包括射频电路、天线以及输入输出装置等。处理器主要用于对通信协议以及通信数据进行处理，以及对终端进行控制，执行软件程序，处理软件程序的数据等。存储器主要用于存储软件程序和数据。射频电路主要用于基带信号与射频信号的转换以及对射频信号的处理。天线主要用于收发电磁波形式的射频信号。输入输出装置，例如触摸屏、显示屏，键盘等主要用于接收用户输入的数据以及对用户输出数据。需要说明的是，有些种类的终端可以不具有输入输出装置。
当需要发送数据时，处理器对待发送的数据进行基带处理后，输出基带信号至射频电路，射频电路将基带信号进行射频处理后将射频信号通过天线以电磁波的形式向外发送。当有数据发送到终端时，射频电路通过天线接收到射频信号，将射频信号转换为基带信号，并将基带信号输出至处理器，处理器将基带信号转换为数据并对该数据进行处理。为便于说明，图10中仅示出了一个存储器和处理器。在实际的终端产品中，可以存在一个或多个处理器和一个或多个存储器。存储器也可以称为存储介质或者存储设备等。存储器可以是独立于处理器设置，也可以是与处理器集成在一起，本申请实施例对此不做限制。
在本申请实施例中，可以将具有收发功能的天线和射频电路视为终端的收发单元，将具有处理功能的处理器视为终端的处理单元。如图10所示，终端包括收发单元1010和处理单元1020。收发单元也可以称为收发器、收发机、收发装置等。处理单元也可以称为处理器，处理单板，处理模块、处理装置等。可选的，可以将收发单元1010中用于实现接收功能的器件视为接收单元，将收发单元1010中用于实现发送功能的器件视为发送单元，即收发单元1010包括接收单元和发送单元。收发单元有时也可以称为收发机、收发器、或收发电路等。接收单元有时也可以称为接收机、接收器、或接收电路等。发送单元有时也可以称为发射机、发射器或者发射电路等。应理解，收发单元1010用于执行上述方法实施例中终端侧的发送操作和接收操作，处理单元1020用于执行上述方法实施例中终端上除了收发操作之外的其他操作。
请参考图11，为本申请实施例中提供的一种通信装置的另一结构示意图。该通信装置可具体为一种网络设备，例如基站，用于实现上述任一方法实施例中涉及网络设备的功能。
该网络设备1100包括：一个或多个DU 1101和一个或多个CU 1102。其中，所述DU 1101可以包括至少一个天线11011，至少一个射频单元11012，至少一个处理器11013和至少一个存储器11014。所述DU 1101主要用于射频信号的收发以及射频信号与基带信号的转换，以及部分基带处理。
所述CU 1102可以包括至少一个处理器11022和至少一个存储器11021。所述CU 1102主要用于进行基带处理，对基站进行控制等。所述CU 1102是基站的控制中心，也可以称为处理单元。
CU 1102和DU 1101之间可以通过接口进行通信，其中，控制面(control plane，CP)接口可以为Fs-C，比如F1-C，用户面(user plane，UP)接口可以为Fs-U，比如F1-U。所述DU 1101与CU 1102可以是物理上设置在一起，也可以物理上分离设置的(即分布式基站)，并不限定。
具体的，CU和DU上的基带处理可以根据无线网络的协议层划分，例如PDCP层及以上协议层的功能设置在CU，PDCP层以下的协议层(例如RLC层和MAC层等)的功能设置在DU。又例如，CU实现无线资源控制(radio resource control，RRC)层，分组数据汇聚协议(packet data convergence protocol，PDCP)层的功能，DU实现无线链路控制(radio link control，RLC)、媒体接入控制(medium access control，MAC)和物理(physical，PHY)层的功能。
可选的，网络设备1100可以包括一个或多个射频单元(radio unit，RU)，一个或多个DU和一个或多个CU。其中，DU可以包括至少一个处理器11013和至少一个存储器11014，RU可以包括至少一个天线11011和至少一个射频单元11012，CU可以包括至少一个处理器11022和至少一个存储器11021。
在一个实施例中，所述CU 1102可以由一个或多个单板构成，多个单板可以共同支持单一接入指示的无线接入网(如5G网)，也可以分别支持不同接入制式的无线接入网(如LTE网，5G网或其他网)。所述存储器11021和处理器11022可以服务于一个或多个单板。也就是说，可以每个单板上单独设置存储器和处理器。也可以是多个单板共用相同的存储器和处理器。此外，每个单板上还可以设置有必要的电路。所述DU 1101可以由一个或多个单板构成，多个单板可以共同支持单一接入指示的无线接入网(如5G网)，也可以分别支持不同接入制式的无线接入网(如LTE网，5G网或其他网)。所述存储器11014和处理器11013可以服务于一个或多个单板。也就是说，可以每个单板上单独设置存储器和处理器。也可以是多个单板共用相同的存储器和处理器。此外每个单板上还可以设置有必要的电路。
本申请实施例还提供一种芯片系统，包括：处理器，所述处理器与存储器耦合，所述存储器用于存储程序或指令，当所述程序或指令被所述处理器执行时，使得该芯片系统实现上述任一方法实施例中的对应终端的方法或者对应网络设备的方法。
可选地，该芯片系统中的处理器可以为一个或多个。该处理器可以通过硬件实现也可以通过软件实现。当通过硬件实现时，该处理器可以是逻辑电路、集成电路等。当通过软件实现时，该处理器可以是一个通用处理器，通过读取存储器中存储的软件代码来实现。
可选地，该芯片系统中的存储器也可以为一个或多个。该存储器可以与处理器集成在一起，也可以和处理器分离设置，本申请并不限定。示例性的，存储器可以是非瞬时性处理器，例如只读存储器ROM，其可以与处理器集成在同一块芯片上，也可以分别设置在不同的芯片上，本申请对存储器的类型，以及存储器与处理器的设置方式不作具体限定。
示例性的，该芯片系统可以是现场可编程门阵列(field programmable gate array，FPGA)，可以是专用集成芯片(application specific integrated circuit，ASIC)，还可以是系统芯片(system on chip，SoC)，还可以是中央处理器(central processor unit，CPU)，还可以是网络处理器(network processor，NP)，还可以是数字信号处理电路(digital signal processor，DSP)，还可以是微控制器(micro controller unit，MCU)，还可以是可编程控制器(programmable logic device，PLD)或其他集成芯片。
应理解，上述方法实施例中的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。结合本申请实施例所公开的方法步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。
本申请实施例还提供一种计算机可读存储介质，所述计算机存储介质中存储有计算机可读指令，当计算机读取并执行所述计算机可读指令时，使得计算机执行上述任一方法实施例中的方法。
本申请实施例还提供一种计算机程序产品，当计算机读取并执行所述计算机程序产品时，使得计算机执行上述任一方法实施例中的方法。
本申请实施例还提供一种通信系统，该通信系统包括终端设备。可选的，该通信系统中还可包括网络设备。可选的，该通信系统中还可包括核心网设备。
应理解，本申请实施例中提及的处理器可以是CPU，还可以是其他通用处理器、DSP、ASIC、FPGA或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
还应理解，本申请实施例中提及的存储器可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(read-only memory，ROM)、可编程只读存储器、可擦除可编程只读存储器、电可擦除可编程只读存储器或闪存。易失性存储器可以是随机存取存储器(random access memory，RAM)，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的RAM可用，例如静态随机存取存储器、动态随机存取存储器、同步动态随机存取存储器、双倍数据速率同步动态随机存取存储器、增强型同步动态随机存取存储器、同步连接动态随机存取存储器和直接内存总线随机存取存储器。
需要说明的是，当处理器为通用处理器、DSP、ASIC、FPGA或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件时，存储器(存储模块)集成在处理器中。
应注意，本文描述的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
应理解，在本申请的各种实施例中涉及的各种数字编号仅为描述方便进行的区分，上述各过程或步骤的序号的大小并不意味着执行顺序的先后，各过程或步骤的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、ROM、RAM、磁碟或者光盘等各种可以存储程序代码的介质。
在本申请的各个实施例中，如果没有特殊说明以及逻辑冲突，不同的实施例之间的术语和/或描述具有一致性、且可以相互引用，不同的实施例中的技术特征根据其内在的逻辑关系可以组合形成新的实施例。

Claims (20)

  1. 一种通信方法，应用于终端或终端中的模块，其特征在于，包括：
    接收来自网络设备的下行控制信息DCI，所述DCI中包括混合自动重传请求HARQ反馈定时指示字段，所述HARQ反馈定时指示字段指示物理上行控制信道PUCCH与所述DCI调度的物理下行共享信道PDSCH之间间隔的时间单元，其中，所述PUCCH用于承载所述PDSCH的HARQ反馈信息；
    在用于承载所述PDSCH的解调参考信号DMRS的时频资源与控制资源集合CORESET的时频资源重叠的条件下，确定DMRS的后移距离；
    根据所述DMRS的后移距离和所述PDSCH的持续时间中的至少一个，确定第一时间参数d3；
    根据所述第一时间参数d3，确定处理时间T，所述处理时间T包括所述终端从PDSCH的接收到生成对应的HARQ反馈信息所需的时间；
    在所述PUCCH的第一个符号不早于最早反馈符号的条件下，向所述网络设备发送HARQ反馈信息，其中，所述最早反馈符号是根据所述PDSCH的最后一个符号与所述处理时间T确定的符号，所述HARQ反馈信息是根据所述PDSCH的译码结果确定的。
  2. 如权利要求1所述的方法，其特征在于，所述方法还包括：
    在所述PUCCH的第一个符号早于所述最早反馈符号的条件下，不发送所述HARQ反馈信息或发送否定应答NACK。
  3. 如权利要求1或2所述的方法，其特征在于，所述根据所述PDSCH的持续时间，确定第一时间参数d3，包括：
    在所述PDSCH的持续时间小于或等于持续时间门限的条件下，所述第一时间参数d3的取值为0。
  4. 如权利要求1或2所述的方法，其特征在于，所述根据所述DMRS的后移距离和PDSCH的持续时间，确定第一时间参数d3，包括：
    在所述PDSCH的持续时间大于持续时间门限的条件下或在所述PDSCH的持续时间为预设集合中的取值时，根据所述DMRS的后移距离确定所述第一时间参数d3。
  5. 如权利要求1、2或4中任一项所述的方法，其特征在于，所述根据所述DMRS的后移距离，确定第一时间参数d3，包括：
    所述第一时间参数d3的取值等于所述DMRS的后移距离。
  6. 如权利要求1、2或4中任一项所述的方法，其特征在于，所述根据所述DMRS的后移距离，确定第一时间参数d3，包括：
    根据所述DMRS的后移距离，从多个数值集合中，确定第一数值集合；
    根据所述第一数值集合，确定所述第一时间参数d3。
  7. 如权利要求6所述的方法，其特征在于，所述根据所述第一数值集合，确定所述第一时间参数d3，包括：
    根据预配置的条件，所述第一时间参数d3的取值等于所述第一数值集合中的第一数值。
  8. 如权利要求4至7中任一项所述的方法，其特征在于，所述预设集合中包括N个值，所述N小于或等于协议规定的PDSCH持续时间的取值的总数，且所述N为正整数；或者， 所述预设集合中的值均满足小于或等于第二持续时间门限。
  9. 如权利要求1至8中任一项所述的方法，其特征在于，所述处理时间T满足以下条件：
    T proc,1＝(N 1+d 1,1+d 2+d 3)(2048+144)·κ2 -μ·T C+T ext
    其中，所述T proc,1代表所述处理时间T，所述N 1表示根据子载波间隔、所述终端的处理能力以及是否配置附加DMRS确定的PDSCH的处理时间，所述d 11代表考虑物理下行控制信道PDCCH与PDSCH的重叠所引入的放松时间，所述d 2代表考虑不同优先级上行信道重叠所引入的参数，所述d 3代表所述第一时间参数，所述T C代表时间单位，所述T ext在共享频谱信道接入的操作中取1，其余场景取0，κ为常数64，所述u指示子载波间隔。
  10. 如权利要求1至8中任一项所述的方法，其特征在于，所述处理时间T满足以下条件：
    T proc,1＝(N 1+max(d 1,1,d 3)+d 2)(2048+144)·κ2 -μ·T C+T ext
    其中，所述T proc,1代表所述处理时间T，所述N 1表示根据子载波间隔、所述终端的处理能力以及是否配置附加DMRS确定的PDSCH的处理时间，所述d 11代表考虑PDCCH与PDSCH的重叠所引入的放松时间，所述d 2代表考虑不同优先级上行信道重叠所引入的参数，所述d 3代表所述第一时间参数，所述T C代表时间单位，所述T ext在共享频谱信道接入的操作中取1，其余场景取0，κ表示为常数64，所述u指示子载波间隔。
  11. 一种通信方法，应用于终端或终端中的模块，其特征在于，包括：
    接收来自网络设备的下行控制信息DCI，所述DCI中包括混合自动重传请求HARQ反馈定时指示字段，所述HARQ反馈定时指示字段指示物理上行控制信道PUCCH与所述DCI调度的物理下行共享信道PDSCH之间间隔的时间单元，其中，所述PUCCH用于承载所述PDSCH的HARQ反馈信息；
    在用于承载所述PDSCH的解调参考信号DMRS的时频资源与控制资源集合CORESET的时频资源重叠，且所述终端支持处理能力2且所述处理能力2被使能的条件下，根据处理能力1的参数，确定处理时间T，所述处理时间T包括所述终端从PDSCH的接收到生成对应的HARQ反馈信息所需的时间，其中，在相同的子载波间隔和DMRS配置下，根据所述处理能力2确定的处理时间T2小于所述处理时间T；
    在所述PUCCH的第一个符号不早于最早反馈符号的条件下，向所述网络设备发送HARQ反馈信息，其中，所述最早反馈符号是根据所述PDSCH的最后一个符号与所述处理时间T确定的符号，所述HARQ反馈信息是根据所述PDSCH的译码结果确定的。
  12. 如权利要求11所述的方法，其特征在于，所述方法还包括：
    在所述PUCCH的第一个符号早于所述最早反馈符号的条件下，不发送所述HARQ反馈信息或发送否定应答NACK。
  13. 如权利要求11或12所述的方法，其特征在于，所述根据处理能力1的参数，确定处理时间T，包括：
    所述终端支持所述处理能力2且所述处理能力2被使能，所述DMRS为前载DMRS；
    在所述前载DMRS的后移位置等于或晚于协议规定的原始附加DMRS的位置的条件下，根据配置了附加DMRS时所述处理能力1中的参数，确定所述处理时间T。
  14. 一种通信方法，应用于网络设备或网络设备中的模块，其特征在于，包括：
    接收来自终端的能力信息，所述能力信息指示所述终端支持或不支持物理下行共享信道PDSCH的解调参考信号DMRS符号后移的能力；
    根据所述能力信息，对所述PDSCH进行调度，其中，当所述终端不支持所述PDSCH的DMRS符号后移的能力时，用于承载所述PDSCH的DMRS的时频资源与控制资源集合CORESET的时频资源不重叠。
  15. 一种通信方法，应用于终端或终端中的模块，其特征在于，包括：
    向网络设备发送能力信息，其中，所述能力信息指示所述终端支持或不支持物理下行共享信道PDSCH的解调参考信号DMRS符号后移的能力；
    接收来自所述网络设备的下行控制信息DCI，所述DCI用于调度所述PDSCH，在所述终端不支持所述PDSCH的DMRS符号后移的能力的条件下，所述PDSCH的DMRS的时频资源与控制资源集合CORESET的时频资源不重叠。
  16. 如权利要求15所述的方法，其特征在于，在所述终端不支持PDSCH的DMRS符号后移的能力，且所述PDSCH的DMRS的时频资源与所述CORESET的时频资源重叠的条件下，不接收所述PDSCH。
  17. 一种通信装置，其特征在于，所述装置包括至少一个处理器，所述至少一个处理器与至少一个存储器耦合；
    所述至少一个处理器，用于执行所述至少一个存储器存储的计算机程序或指令，以使得所述装置执行如权利要求1至10中任一项所述的方法，或者使得所述装置执行如权利要求11至13中任一项所述的方法，或者使得所述装置执行如权利要求14所述的方法，或者使得所述装置执行如权利要求15或16所述的方法。
  18. 一种计算机可读存储介质，其特征在于，用于存储指令，当所述指令被执行时，使如权利要求1至10中任一项所述的方法被实现，或者使如权利要求11至13中任一项所述的方法被实现，或者使如权利要求14所述的方法被实现，或者使如权利要求15或16所述的方法被实现。
  19. 一种通信装置，其特征在于，包括处理器和接口电路；
    所述接口电路，用于与所述处理器交互代码指令或数据；
    所述处理器用于执行如权利要求1至10中任一项所述的方法，或者所述处理器用于执行如权利要求11至13中任一项所述的方法，或者所述处理器用于执行如权利要求14所述的方法，或者使得所述装置执行如权利要求15或16所述的方法。
  20. 一种计算机程序，其特征在于，当所述计算机程序被执行时，使如权利要求1至10中任一项所述的方法被实现，或者使如权利要求11至13中任一项所述的方法被实现，或者使如权利要求14所述的方法被实现，或者使如权利要求15或16所述的方法被实现。
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