CN111726211B - Side link feedback control information transmission method and device - Google Patents

Side link feedback control information transmission method and device Download PDF

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Publication number
CN111726211B
CN111726211B CN201910219054.XA CN201910219054A CN111726211B CN 111726211 B CN111726211 B CN 111726211B CN 201910219054 A CN201910219054 A CN 201910219054A CN 111726211 B CN111726211 B CN 111726211B
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time
pscch
psfch
physical
frequency
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CN111726211A (en
Inventor
杨帆
黎超
张兴炜
王俊伟
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to CN201910219054.XA priority Critical patent/CN111726211B/en
Priority to PCT/CN2020/080116 priority patent/WO2020187281A1/en
Publication of CN111726211A publication Critical patent/CN111726211A/en
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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
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607—Details of the supervisory signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The application provides a side link feedback control information transmission method and device, and the embodiment of the application is suitable for the fields of Internet of vehicles, intelligent Internet of vehicles, automatic driving vehicles and the like. The method comprises the following steps: the first terminal equipment determines physical time-frequency resources of a PSFCH (pseudo-random channel) from physical time-frequency resources occupied by the PSSCH and/or the PSCCH, wherein the PSFCH is used for bearing SFCI (Small form-factor interconnect); and the first terminal equipment sends the SFCI to the second terminal equipment on the determined physical time-frequency resource. In the application, the first terminal device wholly multiplexes the PSFCH to the physical time frequency resource of the psch and/or PSCCH for transmission, or carries the SFCI to the physical time frequency resource of the psch and/or PSCCH for transmission, so as to realize the transmission of the SFCI on the psch and/or PSCCH.

Description

Side link feedback control information transmission method and device
Technical Field
The present application relates to the field of wireless communications technologies, and in particular, to a method and an apparatus for transmitting side link feedback control information.
Background
On a Sidelink (Sidelink), data or Information may be sent by one terminal device to another terminal device or a group of terminal devices, and when another terminal device or a group of terminal devices receives the data or Information, it needs to feed back corresponding Information to the device sending the data or Information, for example, the Information of Hybrid Automatic Repeat request-ACKnowledgement (HARQ-ACK), periodic/semi-static Channel State Information (CSI), aperiodic CSI Information, beam failure recovery Information and other Sidelink Feedback Control Information (SFCI, Sidelink Feedback Control Information) are fed back.
At present, how to transmit SFCI on a Sidelink Shared Channel (psch) and/or a Sidelink Control Channel (PSCCH) is still a problem to be solved.
Disclosure of Invention
The application provides a transmission method and device of side link feedback control information (SFCI), which are used for realizing the transmission of the SFCI on PSSCH and/or PSCCH.
In a first aspect, the present application provides an SFCI transmission method, which may be applied to a first terminal device in a sidelink, where the first terminal device may send an SFCI to a second terminal device after receiving data sent by the second terminal device. Then, the first terminal device determines Physical time-frequency resources of a Sidelink Feedback control Channel (PSFCH) from the Physical time-frequency resources occupied by the psch and/or PSCCH, and transmits SFCI to the second terminal device on the determined Physical time-frequency resources.
In the application, the first terminal device transmits the SFCI by wholly multiplexing the PSFCH to the physical time-frequency resource of the psch and/or PSCCH, so as to transmit the SFCI on the psch and/or PSCCH.
Based on the first aspect, in some possible embodiments, the physical time-frequency resource of the PSFCH includes: the Physical time-frequency resources in at least one time unit in the Physical time-frequency resources occupied by the psch and/or PSCCH are N symbols continuous in a time domain and M Physical Resource Blocks (PRB) continuous in a frequency domain in each time unit, N is a positive integer less than or equal to 14, and M is a positive integer.
In the application, the physical time-frequency resource of the PSFCH, which can be determined from the physical time-frequency resources occupied by the psch and/or PSCCH, is a physical time-frequency resource in at least one time unit, and the physical time-frequency resources are continuous in both time domain and frequency domain in each time unit. That is, the PSFCH is multiplexed onto the physical time-Frequency resources of the psch and/or PSCCH in the form of an entire channel, and when the PSFCH is multiplexed, the PSFCH will remain unchanged from the previously configured channel format and the size of the time-Frequency resources, including the pattern (pattern) of the channel DeModulation Reference Signal (DMRS), the number of time domain Orthogonal Frequency Division Multiplexing (OFDM) symbols, the number of Frequency domain PRBs, and so on.
Alternatively, physical time-frequency resources may also be reserved at fixed locations of the psch and/or PSCCH as physical time-frequency resources that may be allocated to the PSFCH. Therefore, the SFCI can demodulate without depending on the reference signal of the PSSCH or the PSCCH, so that the feedback information is fed back quickly, and the receiving time delay is reduced.
Based on the first aspect, in some possible embodiments, the determining, by the first terminal device, a physical time-domain resource of the PSFCH from physical time-frequency resources occupied by the psch and/or PSCCH includes: the first terminal equipment determines the first N symbols in a time unit in physical time-frequency resources occupied by PSSCH and/or PSCCH as the time domain resources of PSFCH; or, the first terminal device determines the last N symbols in a time unit in the physical time-frequency resources occupied by the psch and/or PSCCH as the time-domain resources of the PSFCH; or, the first terminal equipment determines the first K symbols in the physical time-frequency resource occupied by the PSSCH and/or the PSCCH as the time-domain resource of the PSFCH, wherein K is a positive integer; or, the first terminal device determines the last K symbols in the physical time-frequency resource occupied by the psch and/or PSCCH as the time-domain resource of the PSFCH.
Here, N is a positive integer less than or equal to 14, and K is a positive integer. When the physical time domain resource multiplexed to the PSFCH only occupies one time unit, K is equal to N; and when the physical time domain resources multiplexed to the PSFCH occupy multiple time units, K > N.
Based on the first aspect, in some possible embodiments, the determining, by the first terminal device, a physical time-domain resource of the PSFCH from physical time-frequency resources occupied by the psch and/or PSCCH includes: the first terminal equipment determines N symbols corresponding to the PSCCH in physical time-frequency resources occupied by the PSSCH and/or the PSCCH as time-domain resources of the PSFCH.
Here, the N symbols corresponding to the PSCCH are the same as OFDM symbols occupied by the PSCCH; or the number of the N symbols corresponding to the PSCCH is the same as the number of the OFDM symbols occupied by the PSCCH.
Based on the first aspect, in some possible embodiments, the determining, by the first terminal device, a physical frequency-domain resource of a PSFCH from physical time-frequency resources occupied by a PSCCH and/or a PSCCH includes: and the first terminal equipment determines the physical frequency domain resource of the PSFCH of the first terminal equipment at the current time from the physical time frequency resource of at least one time unit according to the position of the physical frequency domain resource of the PSCCH or the PSFCH at the previous time.
Based on the first aspect, in some possible embodiments, the determining, by the first terminal device, the physical frequency-domain resource of the PSFCH of the current first terminal device from the physical time-frequency resource of at least one time unit according to the location of the physical frequency-domain resource of the PSCCH or PSFCH of the previous time includes: and the first terminal equipment determines the physical frequency domain resource of the PSFCH of the first terminal equipment at the current time according to the frequency domain resource offset which is the same as the PSCCH or the PSFCH which is sent by the second terminal equipment at the previous time.
Based on the first aspect, in some possible embodiments, the method further includes: and the first terminal equipment determines the physical time-frequency resources which occupy a time unit together with the PSCCH and are not overlapped in time domain as the physical time-domain resources of the PSFCH.
Based on the first aspect, in some possible embodiments, the method further includes: the first terminal equipment sends Sidelink Control Information (SCI) to the second terminal equipment, wherein the SCI is used for indicating whether the physical time-frequency resource of the psch or PSCCH is occupied by the PSFCH and/or the position of the physical time-frequency resource of the PSFCH.
In this application, the first terminal may reserve a physical time-frequency resource at a fixed location of the psch or PSCCH for allocation to the PSFCH, and then, after receiving the SCI, the second terminal determines whether the reserved physical time-frequency resource is a physical time-frequency resource of the PSFCH according to whether the physical time-frequency resource of the psch or PSCCH indicated by the SCI is occupied by the PSFCH, and then demodulates the PSFCH when the reserved physical time-frequency resource is the physical time-frequency resource of the PSFCH. Therefore, the SFCI can demodulate without depending on the reference signal of the PSSCH or the PSCCH, so that the feedback information is fed back quickly, and the receiving time delay is reduced.
In a second aspect, the present application provides an SFCI transmission method, which may be applied to a first terminal device in a sidelink, where the first terminal device may transmit an SFCI to a second terminal device after receiving data transmitted by the second terminal device. Then, the first terminal device determines the physical time-frequency resource for carrying the SFCI from the physical time-frequency resources occupied by the psch and/or PSCCH, and the physical time-frequency resource for carrying the SFCI is located between the physical time-frequency resources occupied by the adjacent DMRSs; and the first terminal equipment sends the SFCI to the second terminal equipment on the determined physical time-frequency resource.
In the application, the first terminal device multiplexes the SFCI to the physical time-frequency resource between the physical time-frequency resources occupied by the DMRS in the psch and/or PSCCH to transmit, so as to transmit the SFCI on the psch and/or PSCCH.
Further, after the second terminal device estimates the channel state of the adjacent Resource Element (RE) through the psch and/or the DMRS in the PSCCH, the second terminal device may further decode SFCI on the adjacent RE, and since the SFCI generally adopts a lower order modulation method, such as Quadrature Phase Shift Keying (QPSK), the second terminal device may also use the decoded SFCI for channel estimation.
Based on the second aspect, in some possible embodiments, the physical time-frequency resource for carrying the SFCI includes: at least one RE on a symbol adjacent to the symbol where the DMRS is located in physical time frequency resources occupied by the PSSCH or the PSCCH; or at least one RE between REs where the two DMRSs are located in the physical time-frequency resources occupied by the PSSCH or the PSCCH.
In a third aspect, the present application provides an SFCI transmission method, which may be applied to a second terminal device in a sidelink, where the second terminal device may be transmitting data to a first terminal device and receiving an SFCI based on the transmission of the data by the first terminal device according to any one of the first and second aspects. Specifically, the second terminal device may determine the physical time-frequency resource of the PSFCH from the physical time-frequency resources occupied by the PSSCH and/or the PSCCH, where the PSFCH is used to carry the SFCI, and then receive the SFCI sent by the first terminal device on the physical time-frequency resource of the PSFCH.
Based on the third aspect, in some possible embodiments, the method may further include: the second terminal receives the SCI sent by the first terminal, where the SCI is used to indicate the location of the physical time-frequency resource of the PSFCH, and then the second terminal may determine the physical time-frequency resource of the PSFCH according to the indication of the SCI.
In a fourth aspect, the present application provides an SFCI transmission method, which may be applied to a second terminal device in a sidelink, where the second terminal device may be an SFCI that transmits data to a first terminal device and accepts transmission based on the data by the first terminal device according to any one of the first and second aspects. Specifically, the second terminal device determines the physical time-frequency resource between the physical time-frequency resources occupied by the adjacent DMRSs in the psch and/or PSCCH as being used for carrying the SFCI, and then receives the SFCI sent by the first terminal device on the determined physical time-frequency resource.
In a fifth aspect, the present application provides a communication device, which may be an SFCI transmission device in a side link or a chip or a system on a chip in an SFCI transmission device, and may also be a functional module in an SFCI transmission device for implementing the method of the first aspect or any possible implementation manner of the first aspect. The communication apparatus may implement the functions performed by the first terminal device in the above aspects or possible embodiments, and the functions may be implemented by executing corresponding software through hardware. The hardware or software comprises one or more modules corresponding to the functions. For example, the communication device may include: the first determining module is used for determining physical time-frequency resources of a PSFCH (pseudo-random channel) from physical time-frequency resources occupied by a PSSCH (pseudo-random channel) and/or a PSCCH (pseudo-random channel), wherein the PSFCH is used for bearing an SFCI (Small form-factor interconnect); and the first sending module is used for sending the SFCI to the second terminal equipment on the determined physical time-frequency resource.
Based on the fifth aspect, in some possible embodiments, the physical time-frequency resources of the PSFCH include: the PSSCH and/or PSCCH are/is used for allocating physical time-frequency resources in at least one time unit in the physical time-frequency resources occupied by the PSSCH and/or the PSCCH, the physical time-frequency resources in the at least one time unit are N continuous symbols in a time domain and M continuous PRBs in a frequency domain in each time unit, N is a positive integer smaller than or equal to 14, and M is a positive integer.
Based on the fifth aspect, in some possible embodiments, the first determining module is configured to determine, as a time domain resource of the PSFCH, first N symbols within a time unit in physical time-frequency resources occupied by the PSCCH and/or PSCCH; or, the first determining module is configured to determine the last N symbols in a time unit in the physical time-frequency resource occupied by the PSCCH and/or PSCCH as the time-domain resource of the PSFCH; or, the first determining module is configured to determine first K symbols in the physical time-frequency resource occupied by the PSCCH and/or PSCCH as a time-domain resource of the PSFCH, where K is a positive integer; or, the first determining module is configured to determine the last K symbols in the physical time-frequency resource occupied by the PSCCH and/or PSCCH as the time-domain resource of the PSFCH.
Based on the fifth aspect, in some possible embodiments, the first determining module is configured to determine, as the time domain resource of the PSCCH, N symbols corresponding to the PSCCH in the physical time-frequency resources occupied by the PSCCH and/or the PSCCH.
Based on the fifth aspect, in some possible embodiments, the N symbols corresponding to the PSCCH occupy the same orthogonal frequency division multiplexing, OFDM, symbols as the PSCCH; or the number of the N symbols corresponding to the PSCCH is the same as the number of the OFDM symbols occupied by the PSCCH.
Based on the fifth aspect, in some possible embodiments, the first determining module is configured to determine, from the physical time-frequency resources of at least one time unit, the physical frequency-domain resources of the PSFCH of the current first terminal device according to the position of the physical frequency-domain resources of the PSCCH or PSFCH of the previous time.
Based on the fifth aspect, in some possible embodiments, the first determining module is specifically configured to determine, by the first terminal device, the physical frequency domain resource of the PSFCH of the first terminal device at this time according to the frequency domain resource offset which is the same as the frequency domain resource offset of the PSCCH or the PSFCH that is previously sent by the second terminal device.
Based on the fifth aspect, in some possible embodiments, the first determining module is further configured to determine, as the physical time-frequency resources of the PSFCH, physical time-frequency resources that occupy a time unit together with the PSCCH and that do not overlap with each other in a time domain.
Based on the fifth aspect, in some possible embodiments, the first sending module is further configured to send sidelink control information SCI to the second terminal device, where the SCI is used to indicate a location of a physical time-frequency resource of the PSFCH.
The first transmitting module mentioned in the above fifth aspect may be a transmitting interface, a transmitting circuit, a transmitter, or the like; the first determining means may be one or more processors.
In a sixth aspect, the present application provides a communication device, which may be an SFCI transmission device in a side link or a chip or a system on a chip in an SFCI transmission device, and may also be a functional module in an SFCI transmission device for implementing the method according to any possible implementation manner of the second aspect or the second aspect. The communication apparatus may implement the functions performed by the first terminal device in the above aspects or possible embodiments, and the functions may be implemented by executing corresponding software through hardware. The hardware or software comprises one or more modules corresponding to the functions. For example, the communication device may include: the second determining module is used for determining physical time-frequency resources used for bearing SFCI from the physical time-frequency resources occupied by PSSCH and/or PSCCH, and the physical time-frequency resources used for bearing SFCI are positioned between the physical time-frequency resources occupied by adjacent DMRS; and the second sending module is used for sending the SFCI to the second terminal equipment on the determined physical time-frequency resource.
Based on the sixth aspect, in some possible embodiments, the physical time-frequency resource for carrying the SFCI includes: at least one RE on a symbol adjacent to the symbol where the DMRS is located in physical time frequency resources occupied by the PSSCH or the PSCCH; or at least one RE between REs where the two DMRSs are located in the physical time-frequency resources occupied by the PSSCH or the PSCCH.
The second sending module mentioned in the above sixth aspect may be a sending interface, a sending circuit, a sender, or the like; the second determining means may be one or more processors.
In a seventh aspect, the present application provides a communication device, which may be an SFCI transmission device in a side link or a chip or a system on a chip in the SFCI transmission device, and may also be a functional module in the SFCI transmission device for implementing the method according to any possible implementation manner of the third aspect or the third aspect. The communication apparatus may implement the functions performed by the second terminal device in the above aspects or in each possible embodiment, and the functions may be implemented by executing corresponding software through hardware. The hardware or software comprises one or more modules corresponding to the functions. For example, the communication device may include: a third determining module, configured to determine a physical time-frequency resource of a PSFCH from physical time-frequency resources occupied by the PSSCH and/or the PSCCH, where the PSFCH is used to carry an SFCI; and the first receiving module is used for receiving the SFCI sent by the first terminal equipment on the physical time-frequency resource of the PSFCH.
The first receiving module mentioned in the seventh aspect may be a receiving interface, a receiving circuit, a receiver, or the like; the third determining means may be one or more processors.
In an eighth aspect, the present application provides a communication device, which may be an SFCI transmission device in a sidelink or a chip or a system on a chip in an SFCI transmission device, and may also be a functional module in an SFCI transmission device for implementing the method according to any possible implementation manner of the fourth aspect or the fourth aspect. The communication apparatus may implement the functions performed by the second terminal device in the above aspects or in each possible embodiment, and the functions may be implemented by executing corresponding software through hardware. The hardware or software comprises one or more modules corresponding to the functions. For example, the communication device may include: a fourth determining module, configured to determine, by the second terminal device, a physical time-frequency resource between physical time-frequency resources occupied by adjacent DMRSs in the psch and/or PSCCH as being used for carrying the SFCI; and the second receiving module is used for receiving the SFCI sent by the first terminal equipment on the determined physical time-frequency resource.
The second receiving module mentioned in the above eighth aspect may be a receiving interface, a receiving circuit, a receiver, or the like; the fourth determining means may be one or more processors.
In a ninth aspect, the present application provides a communication apparatus, which may be a chip or a system on chip in a first terminal device in a sidelink. The communication apparatus may implement the functions performed by the first terminal device in the above aspects or in each possible implementation manner, and the functions may be implemented by hardware, such as: in one possible implementation, the communication device may include: a processor and a communication interface, the processor being operable to support the communication device to implement the functionality referred to in any one of the possible implementations of the first and second aspects or the first and second aspects, for example: the processor may transmit the SFCI to the second terminal device over the determined physical time-frequency resource over the communication interface. In yet another possible implementation, the communication device may further include a memory for storing computer-executable instructions and data necessary for the communication device. The processor executes the computer executable instructions stored by the memory when the communication device is running, to cause the communication device to perform the SFCI transmission method as described in the first and second aspects or any one of the possible embodiments of the first and second aspects.
In a tenth aspect, the present application provides a communication apparatus, which may be a chip or a system on chip in a second terminal device in a sidelink. The communication apparatus may implement the functions performed by the second terminal device in the above aspects or in each possible implementation manner, and the functions may be implemented by hardware, such as: in one possible implementation, the communication device may include: a processor and a communication interface, the processor being operable to enable the communication device to implement the functionality referred to in the third and fourth aspects or any one of the possible implementations of the third and fourth aspects, for example: the processor may receive, via the communication interface, the SFCI transmitted by the first terminal device on the determined physical time-frequency resource. In yet another possible implementation, the communication device may further include a memory for storing computer-executable instructions and data necessary for the communication device. When the communication device is running, the processor executes the computer-executable instructions stored by the memory to cause the communication device to perform the SFCI transmission method as described in the third and fourth aspects or any one of the possible embodiments of the third and fourth aspects.
In an eleventh aspect, the present application provides a computer-readable storage medium storing instructions for executing the SFCI transmission method of any one of the first to fourth aspects when the instructions are executed on a computer.
In a twelfth aspect, the present application provides a computer program or a computer program product, which, when executed on a computer, causes the computer to implement the SFCI transmission method of any one of the first to fourth aspects.
In a thirteenth aspect, the present application provides a communication system comprising a first terminal device and a second terminal device; wherein, the first terminal is configured to execute the SFCI transmission method of any one of the first and second aspects; a second terminal device configured to execute the SFCI transmission method according to any one of the third and fourth aspects. Alternatively, the communication system may be a sidelink system.
It should be understood that the fifth to thirteenth aspects of the present application are consistent with the technical solutions of the first to fourth aspects of the present application, and the beneficial effects achieved by the various aspects and the corresponding possible embodiments are similar, and are not described again.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the background art of the present application, the drawings required to be used in the embodiments or the background art of the present application will be described below.
Fig. 1A is a schematic structural diagram of a communication system in an embodiment of the present application;
fig. 1B is a schematic diagram of another architecture of a communication system according to an embodiment of the present application;
fig. 2 is a first flowchart of an SFCI transmission method in an embodiment of the present application;
fig. 3A is a first schematic diagram illustrating a transmission manner of a PSFCH in the embodiment of the present application;
fig. 3B is a schematic diagram illustrating a transmission method of the PSFCH in the embodiment of the present application;
fig. 4A is a first schematic diagram illustrating relative positions of physical time domain resources of a PSFCH and physical time domain resources of a PSSCH in an embodiment of the present application;
fig. 4B is a schematic diagram of a relative position of physical time domain resources of a PSFCH and physical time domain resources of a PSSCH in the embodiment of the present application;
fig. 4C is a schematic diagram showing the relative positions of the physical time domain resources of the PSFCH and the physical time domain resources of the PSSCH in the embodiment of the present application;
fig. 4D is a fourth schematic diagram illustrating relative positions of physical time domain resources of the PSFCH and physical time domain resources of the PSSCH in the embodiment of the present application;
fig. 4E is a schematic diagram illustrating a relative position of physical time domain resources of the PSFCH and physical time domain resources of the PSSCH in the embodiment of the present application;
fig. 4F is a schematic diagram six illustrating relative positions of physical time domain resources of the PSFCH and physical time domain resources of the PSSCH in the embodiment of the present application;
fig. 4G is a schematic diagram seven illustrating the relative positions of the physical time domain resources of the PSFCH and the physical time domain resources of the PSSCH in the embodiment of the present application;
fig. 4H is a schematic diagram eight illustrating relative positions of physical time domain resources of the PSFCH and physical time domain resources of the PSSCH in the embodiment of the present application;
fig. 4I is a diagram nine illustrating the relative positions of the physical time domain resources of the PSFCH and the physical time domain resources of the PSSCH in the embodiment of the present application;
fig. 5A is a schematic first diagram illustrating relative positions of physical time domain resources of a PSFCH and physical time domain resources of a PSCCH in an embodiment of the present application;
fig. 5B is a schematic diagram of a relative position of a physical time domain resource of a PSFCH and a physical time domain resource of a PSCCH in the embodiment of the present application;
fig. 5C is a schematic diagram third of relative positions of physical time-frequency resources of the PSFCH and physical time-frequency resources of the PSCCH in the embodiment of the present application;
fig. 6 is a schematic flow chart of an SFCI transmission method in the embodiment of the present application;
fig. 7 is a schematic diagram of relative positions of REs carrying SFCI and DMRS in psch or PSCCH in the embodiment of the present application;
fig. 8A is a first schematic diagram illustrating a transmission manner of an SFCI in an embodiment of the present application;
fig. 8B is a schematic diagram illustrating a transmission method of the SFCI in the embodiment of the present application;
fig. 9A is a third schematic flowchart of an SFCI transmission method in the embodiment of the present application;
fig. 9B is a fourth flowchart illustrating an SFCI transmission method in the embodiment of the present application;
fig. 10 is a first structural diagram of a communication device in an embodiment of the present application;
fig. 11 is a second structural diagram of a communication device in the embodiment of the present application;
fig. 12 is a third structural diagram of a communication device in the embodiment of the present application;
fig. 13 is a fourth structural diagram of a communication device in the embodiment of the present application;
fig. 14 is a fifth structural diagram of a communication device in the embodiment of the present application.
Detailed Description
The embodiments of the present application will be described below with reference to the drawings. In the following description, reference is made to the accompanying drawings which form a part hereof and in which is shown by way of illustration specific aspects of embodiments of the present application or in which specific aspects of embodiments of the present application may be employed. It should be understood that embodiments of the present application may be used in other ways and may include structural or logical changes not depicted in the drawings. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present application is defined by the appended claims. For example, it should be understood that the disclosure in connection with the described methods may equally apply to the corresponding apparatus or system for performing the methods, and vice versa. For example, if one or more particular method steps are described, the corresponding apparatus may comprise one or more units, such as functional units, to perform the described one or more method steps (e.g., a unit performs one or more steps, or multiple units, each of which performs one or more of the multiple steps), even if such one or more units are not explicitly described or illustrated in the figures. On the other hand, for example, if a particular apparatus is described based on one or more units, such as functional units, the corresponding method may comprise one step to perform the functionality of the one or more units (e.g., one step performs the functionality of the one or more units, or multiple steps, each of which performs the functionality of one or more of the plurality of units), even if such one or more steps are not explicitly described or illustrated in the figures. Further, it is to be understood that features of the various exemplary embodiments and/or aspects described herein may be combined with each other, unless explicitly stated otherwise.
The embodiment of the application provides a communication system, which can be a side link communication system, and the side link communication system can be suitable for the fields of Vehicle networking (V2X, Vehicle to electric), intelligent networking automobiles, automatic driving automobiles and the like. Fig. 1A is a schematic structural diagram of a communication system in an embodiment of the present application, and referring to fig. 1A, the communication system 10 may include: base station 11 and terminal equipment 12. Fig. 1B is another schematic architecture diagram in the embodiment of the present application, and referring to fig. 1B, the communication system 10 may further include a plurality of terminal devices 12. Of course, in the embodiment of the present application, the type and number of the network elements included in the communication system, and the connection relationship between the network elements are not limited thereto.
In the embodiment of the application, the terminal device can communicate with other terminal devices while communicating with the base station. The base station may perform resource configuration, scheduling, coordination, and the like on a sidelink (sidelink) for communication between the terminal devices, and assist the terminal devices in direct communication. The terminal device may also perform resource configuration, scheduling, coordination, and the like for a side link of communication between other terminal devices, which is not specifically limited in the embodiment of the present application.
The base station and the network side device may be a device that is used by an Access network side to support a terminal to Access a wireless communication system, and may be, for example, an evolved Node b (eNB) in a 4G Access technology communication system, a next generation base station (gNB) in a 5G Access technology communication system, a Transmission Reception Point (TRP), a Relay Node (Relay Node), an Access Point (AP), and the like.
The Terminal device may be a device providing voice or data connectivity to a User, and may also be referred to as a User Equipment (UE), a mobile STAtion (mobile STAtion), a subscriber unit (subscriber unit), a STAtion (STAtion), or a Terminal (TE). The terminal device may be a cellular phone (cellular phone), a Personal Digital Assistant (PDA), a Wireless modem (modem), a handheld device (hand), a laptop computer (laptop computer), a cordless phone (cordless phone), a Wireless Local Loop (WLL) station, a tablet (pad), or the like. With the development of wireless communication technology, all devices that can access a wireless communication system, can communicate with a network side of the wireless communication system, or communicate with other devices through the wireless communication system may be terminal devices in the embodiments of the present application, such as terminals and automobiles in intelligent transportation, home devices in smart homes, power meter reading instruments in smart grid, voltage monitoring instruments, environment monitoring instruments, video monitoring instruments in smart security networks, cash registers, and so on. The terminal device may be stationary or mobile.
Based on the communication system architecture, after receiving data sent by other terminal devices, the terminal device may feed back an SFCI to the other terminal devices, where the SFCI may include HARQ-ACK, CSI, and the like, and the CSI may include a Channel Quality Indicator (CQI), a Precoding Matrix Indicator (PMI), a Rank Indicator (RI), and the like. At present, feedback of SFCI on an independent physical sidelink feedback channel, namely PSFCH, is supported, but how to feedback SFCI on PSSCH and/or PSCCH still remains a problem to be solved urgently.
Therefore, the embodiment of the present application provides an SFCI transmission method, which can be applied to the above communication system to implement SFCI transmission on psch and/or PSCCH. The SFCI transmission method will be described below using a detailed embodiment.
The first terminal device and the second terminal device referred to in the following embodiments may be any terminal device in the above-described communication system. For convenience of description, the first terminal device is a receiving end for receiving data and is also a transmitting end for transmitting the SFCI, and the second terminal device is a transmitting end for transmitting data and is also a receiving end for receiving the SFCI.
In the embodiment of the present application, one subframe may be divided into a plurality of slots or a plurality of mini-slots, one slot may include 14 OFDM symbols, and one mini-slot may include Q symbols, where Q is a positive integer less than 14. In the channel scheduling, the scheduling may be performed in units of one slot, or in units of one mini slot (i.e., Q symbols). Then, a slot or a mini-slot (i.e., Q symbols) may be referred to as a "time unit". In the following embodiments, the SFCI transmission method provided in the embodiments of the present application is described by taking a time unit as an example.
Fig. 2 is a first schematic flow chart of an SFCI transmission method in an embodiment of the present application, and referring to fig. 2, the SFCI transmission method may include:
s201: the first terminal equipment determines physical time-frequency resources of PSFCH from physical time-frequency resources occupied by PSSCH and/or PSCCH;
wherein, the PSFCH is used for carrying the SFCI;
here, the first terminal may multiplex the PSFCH onto the PSCCH and/or PSCCH transmitted simultaneously with the PSFCH when the first terminal device needs to transmit the SFCI to the second terminal device. Then, the first terminal may determine the physical time-frequency resources of the PSFCH, i.e. the physical time-frequency resources allocated to the PSFCH, from the physical time-frequency resources occupied by the psch and/or PSCCH.
The PSCCH and/or PSCCH transmitted simultaneously with the PSFCH refers to the PSCCH and/or PSCCH transmitted overlapping with the PSFCH in a time domain, that is, the PSFCH and the PSCCH and/or PSCCH overlap with each other by at least one OFDM symbol in the time domain.
Specifically, the first terminal may multiplex the PSFCH to the psch and/or PSCCH in the form of a whole channel, where the physical time-frequency resource allocated to the PSFCH may be a physical time-frequency resource in one or more time slots of the physical time-frequency resources occupied by the psch and/or PSCCH, the physical time-frequency resource in one or more time slots may be N symbols consecutive in a time domain and M PRBs consecutive in a frequency domain in each time slot, N is a positive integer less than or equal to 14, and M is a positive integer.
When the above-mentioned PSFCH is multiplexed to the psch and/or PSCCH in the form of an entire channel, the psch and/or PSCCH may occupy one or more slots to perform one transmission, or may occupy multiple slots to perform repeated transmission. When the PSCCH and/or PSCCH occupy multiple time slots for repeated transmission, fig. 3A is a schematic diagram of a transmission mode of the PSFCH in the embodiment of the present application, as shown in fig. 3A, the PSCCH occupies time slots 0 to 2 for repeated transmission, and the PSCCH is repeatedly transmitted three times, and the first terminal device may select physical time-frequency resources (e.g., symbols 0 to 6) with the same position as the physical time-frequency resources of the PSFCH in each time slot, so that the PSFCH is also repeatedly transmitted three times; or, fig. 3B is a schematic diagram of a transmission manner of the PSFCH in the embodiment of the present application, referring to fig. 3B, the PSSCH occupies slot 0 to slot 2 for repeated transmission, the PSSCH is repeatedly transmitted three times, and the first terminal device may select physical time-frequency resources (e.g., symbol 0 to symbol 6) as the physical time-frequency resources of the PSFCH in one slot (e.g., slot 1) of slot 0 to slot 2.
For example, fig. 4A is a schematic diagram of relative positions of physical time-frequency resources of the PSFCH and physical time-frequency resources of the PSSCH in the embodiment of the present application, i.e., referring to fig. 4A, assuming that the PSSCH occupies the physical time-frequency resources of at least one time slot in the time domain, then the physical time-frequency resources allocated to the PSFCH may be continuous physical time-frequency resources in both the time domain and the frequency domain in each of the at least one time slot occupied by the PSSCH. At this time, the PSFCH may be multiplexed onto the physical time-frequency resource of the PSSCH in a puncturing or rate matching manner.
Here, it should be noted that the mapping between the data or control information in the sidelink communication system and the PSFCH may be performed in a "rate matching" or "puncturing" manner. On one hand, the resource of the PSFCH is determined on the resource of the PSSCH or PSCCH, and data or control information is mapped on the remaining resources, for example, the physical time-frequency resource scheduled to the PSSCH is N symbols, M PRBs, where the PSFCH needs to occupy 2 symbols and 1 PRB, then data mapping can be performed from the resource of the 2 symbols and 1 PRB, that is, so-called "rate matching"; on the other hand, whether the SFCI is carried or not may be considered when mapping data, and the mapping is performed on the physical time-frequency resources occupied by the entire PSSCH, so that the SFCI may occupy the portion of the physical time-frequency resources after determining the physical time-frequency resources for carrying the SFCI, and the data on the physical time-frequency resources may be discarded, that is, so-called "puncturing".
It should be noted that, when the PSFCH is multiplexed to the psch and/or PSCCH in the form of a whole channel, the PSFCH keeps its own independent channel format and resource size unchanged, including the DMRS pattern (pattern), the number of OFDM symbols of the channel, and the PRB format, all of which are unchanged. Therefore, the SFCI can obtain quick feedback, and the receiving time delay is reduced.
In some possible embodiments, when the first terminal device allocates the physical time domain resource for the PSFCH, the foregoing S201 may exist and is not limited to the following cases:
in the first case, the first terminal device determines the first N symbols in a time slot of the physical time-frequency resources occupied by the PSCCH and/or PSCCH as the time-domain resources of the PSFCH.
Here, the first terminal device may allocate the first N symbols in one slot of the PSCCH and/or PSCCH to the PSFCH, and in this case, the PSCCH and/or PSCCH may only occupy the physical time domain resource of one slot for transmission, or may occupy the physical time domain resources of multiple slots for repeated transmission. For example, fig. 4B is a schematic diagram illustrating the relative positions of the physical time domain resources of the PSFCH and the physical time domain resources of the PSSCH in the embodiment of the present application, referring to fig. 4B, the PSSCH occupies slot 1, and then the first 7 symbols (i.e., symbol 0 to symbol 6) in slot 1 may be allocated to the PSFCH by the first terminal device; alternatively, fig. 4C is a schematic diagram showing the relative positions of the physical time domain resources of the PSFCH and the physical time domain resources of the PSSCH in the embodiment of the present application, and referring to fig. 4C, the PSSCH occupies slot 1 and slot 2, and then the first terminal device may allocate the first 7 symbols (i.e., symbol 0 to symbol 6) in slot 1 and the first 7 symbols (i.e., symbol 0 to symbol 6) in slot 2 to the PSFCH.
In the second case, the first terminal device determines the last N symbols in a time slot of the physical time-frequency resources occupied by the PSCCH and/or PSCCH as the time-domain resources of the PSFCH.
Here, similar to the first case, the first terminal device may also allocate the last N symbols in one slot of the psch and/or PSCCH to the PSFCH, and in this case, the psch and/or PSCCH may only occupy the physical time domain resource of one slot for transmission, or may occupy the physical time domain resources of a plurality of slots for repeated transmission, and the last N symbols in each slot are allocated to the PSFCH. For example, fig. 4D is a schematic diagram illustrating the relative positions of the physical time domain resources of the PSFCH and the physical time domain resources of the PSSCH in the embodiment of the present application, referring to fig. 4D, the PSSCH occupies slot 1, and then the first terminal device may allocate the last 7 symbols (i.e., symbol 7 to symbol 13) in slot 1 to the PSFCH; alternatively, fig. 4E is a schematic diagram illustrating the relative positions of the physical time domain resources of the PSFCH and the physical time domain resources of the PSSCH in the embodiment of the present application, and referring to fig. 4E, the PSSCH occupies slot 1 and slot 2, and then the first terminal device may allocate the last 7 symbols (i.e., symbol 7 to symbol 13) in slot 1 and the last 7 symbols (i.e., symbol 7 to symbol 13) in slot 2 to the PSFCH.
In the third case, the first terminal device determines the first K symbols in the physical time-frequency resource occupied by the PSCCH and/or PSCCH as the time-domain resource of the PSFCH;
here, the first terminal device may allocate the first K symbols in the PSCCH and/or PSCCH overall channel to the PSFCH. If the PSCCH and/or PSCCH occupy S symbols in one slot, S being an integer less than 14, then the first K symbols of the S symbols are allocated to the PSFCH, and if the PSCCH and/or PSCCH occupy multiple slots, then the first K symbols of the multiple slots are allocated to the PSFCH. For example, fig. 4F is a schematic diagram six illustrating relative positions of physical time domain resources of the PSFCH and physical time domain resources of the PSSCH in the embodiment of the present application, as shown in fig. 4F, the PSSCH occupies 10 symbols (i.e., symbol 1 to symbol 10, i.e., S ═ 10) in slot 1, and the first 7 symbols (i.e., symbol 1 to symbol 7) in the 10 symbols may be allocated to the PSFCH by the first terminal device; alternatively, fig. 4G is a diagram illustrating a relative position of the physical time domain resources of the PSFCH and the physical time domain resources of the PSSCH in the embodiment of the present application, as shown in fig. 4G, the PSSCH occupies 13 symbols (i.e., symbol 1 to symbol 13) in slot 1 and the first 7 symbols (i.e., symbol 0 to symbol 6) in slot 2, and for 20 symbols, the first 17 symbols (i.e., symbol 1 to symbol 13 in slot 1 and symbol 0 to symbol 3 in slot 2) of the 20 symbols may be allocated to the PSFCH by the first terminal device.
In a fourth case, the first terminal device determines the last K symbols in the physical time-frequency resource occupied by the PSCCH and/or PSCCH as the time-domain resource of the PSFCH.
Here, similar to the third case described above, the first terminal device may allocate the last K symbols in the entire channel of the PSCCH and/or PSCCH to the PSFCH. If the PSCCH and/or PSCCH occupy S symbols in one slot, S being an integer less than 14, then the last K symbols of the S symbols are allocated to the PSFCH, and if the PSCCH and/or PSCCH occupy multiple slots, then the last K symbols of the multiple slots are allocated to the PSFCH. For example, fig. 4H is a schematic diagram eight illustrating relative positions of physical time domain resources of the PSFCH and physical time domain resources of the PSSCH in the embodiment of the present application, as shown in fig. 4H, the PSSCH occupies 10 symbols (i.e., symbol 1 to symbol 10, and S equals to 10) in slot 1, and the first terminal device may allocate the last 7 symbols (i.e., symbol 4 to symbol 10) in slot 1 to the PSFCH; alternatively, fig. 4I is a schematic diagram illustrating a relative position of physical time domain resources of the PSFCH and physical time domain resources of the PSSCH in the embodiment of the present application, as shown in fig. 4I, the PSSCH occupies 13 symbols (i.e., symbol 1 to symbol 13) in slot 1 and the first 7 symbols (i.e., symbol 0 to symbol 6) in slot 2, and for 20 symbols, the first terminal device may allocate the last 17 symbols (i.e., symbol 4 to symbol 13 in slot 1 and symbol 0 to symbol 6 in slot 2) of the 20 symbols to the PSFCH.
In a fifth case, the first terminal device may determine, as the time domain resource of the PSFCH, N symbols corresponding to the PSCCH in the physical time-frequency resources occupied by the PSCCH and/or PSCCH.
Here, the above-mentioned N symbols corresponding to the PSCCH may occupy the same OFDM symbols as the PSCCH, for example, fig. 5A is a schematic diagram of relative positions of physical time domain resources of the PSFCH and physical time domain resources of the PSCCH in this embodiment, as shown in fig. 5A, the PSCCH occupies symbol 0 and symbol 1 in slot 0, so that the N symbols corresponding to the PSCCH, that is, the N symbols allocated to the PSFCH may similarly occupy symbol 0 and symbol 1 in slot 0 and be frequency division multiplexed with the PSCCH on the frequency domain, and of course, symbol 0 and symbol 1 may also be occupied in other slots; or, fig. 5B is a schematic diagram of a relative position of a physical time domain resource of a PSCCH and a physical time domain resource of the PSCCH in this embodiment, as shown in fig. 5B, the PSCCH occupies symbol 0 and symbol 1 in a time slot 0, so that N symbols corresponding to the PSCCH, that is, N symbols allocated to the PSCCH may be the same as OFDM symbols occupied by the PSCCH, that is, N symbols corresponding to the PSCCH may occupy 2 symbols, such as symbol 2 and symbol 3, in the time slot 0, and of course, other 2 symbols may also be occupied in the time slot 0, or other 2 symbols may be occupied in other time slots.
Certainly, in practical application, there may be other situations where the first terminal device allocates the physical time domain resource to the PSFCH in the time domain, and this embodiment of the present application is not specifically limited.
In some possible embodiments, when the first terminal device allocates physical frequency domain resources for the PSFCH, the above S201 may be, and is not limited to, the following:
in the first case, the first terminal may determine the physical frequency domain resource allocated to the PSFCH from the physical time-frequency resources occupied by the psch and/or PSCCH according to an indication sent by the base station or the second terminal device.
Here, the base station may determine the physical frequency-domain resource allocated to the PSFCH from the physical time-frequency resource occupied by the psch and/or PSCCH through a semi-static configuration or a dynamic indication. For example, the base station may indicate the location of the physical frequency domain Resource allocated to the PSFCH by transmitting Downlink Control Information (DCI) to the first terminal device, and may also indicate the location of the physical frequency domain Resource allocated to the PSFCH by Radio Resource Control (RRC) signaling. Alternatively, the second terminal device may indicate the location of the physical frequency domain resources allocated to the PSFCH by transmitting the SCI to the first terminal device.
In the second case, the first terminal device determines the physical frequency domain resource of the PSFCH of the first terminal device at this time from the physical time-frequency resource occupied by the PSCCH and/or PSCCH according to the position of the physical frequency domain resource of the PSCCH or PSFCH at the previous time.
Here, when the first terminal device transmits the PSFCH, if the semi-statically configured periodic resource used by the PSCCH or the physical frequency domain resource of the configuration grant (configuration grant) is used at this time, the second terminal device may not need to carry resource configuration information in the SCI, or the second terminal device does not need to transmit the SCI for other reasons, so that the first terminal device cannot Configure the relevant PSFCH location, and then the first terminal device may associate the physical frequency domain resource allocated to the PSFCH of the first terminal device at this time according to the location of the physical frequency domain resource of the PSCCH or the PSFCH previously transmitted by the second terminal device to the first terminal device or the location of the physical frequency domain resource of the PSCCH or the PSFCH previously transmitted by the first terminal device itself.
Specifically, the first terminal device may employ, without limitation, the following two methods to determine the location of the PSFCH of the first terminal device this time.
First, the first terminal device may allocate PRBs having the same frequency-domain resource offset as the PSCCH or PSFCH previously transmitted by the first terminal device or the second terminal device to the PSFCH, e.g., the PRB offset from the resource pool boundary, the offset from the PSCCH resource boundary, or an offset from another reference point. For example, the number of PRBs of the psch transmitted last time is 10 PRBs, and the PSFCH occupies the 3 rd PRB arranged in the ascending order of the PRB indexes, and correspondingly, if the number of PRBs of the psch fed back this time is 6, the PSFCH will also occupy from the 3 rd PRB.
In this embodiment, the first terminal device and the terminal device may use the same resource pool, or may use different resource pools.
In a second method, the first terminal device may calculate the starting PRB allocated to the PSFCH by the first terminal device this time according to the following expression (1) or (2) according to the starting PRB of the PSCCH or the PSFCH previously sent by the second terminal device.
PRBUE1 PSCCH mod(No.of PRBs for UE1 PSSCH-No.of PRBs for UE2 PSFCH) (1)
PRBUE1 PSFCH mod(No.of PRBs for UE1 PSSCH-No.of PRBs for UE2 PSFCH) (2)
In equation (1), PRBUE1 PSCCHFor the PSCCH PRB Index (Index) of the second terminal device transmitted last time, No. of PRBs for UE1 pschs is the number of PSCCH PRBs of the second terminal device transmitted last time, and No. of PRBs for UE2 pscfh is the number of PRBs allocated to the first terminal device this time to transmit PSFCH.
In equation (2), PRBUE1 PSFCHFor the PSFCH PRB Index (Index) of the second terminal device transmitted last time, No. of PRBs for UE1 psch is the number of PSFCH PRBs of the second terminal device transmitted last time, and No. of PRBs for UE2 PSFCH is the number of PRBs allocated to the first terminal device for transmitting PSFCH this time.
In this embodiment of the present application, if there is no PSCCH resource that can be multiplexed or associated when the first terminal device needs to send the PSFCH, or the first terminal device does not send data to the second terminal device at this time, the first terminal device may further select to splice the PSFCH and the PSCCH in one time slot, where S201 may further include: and the first terminal equipment determines the physical time-frequency resources which occupy a time slot together with the PSCCH and are not overlapped in time domain as the physical time-frequency resources of the PSFCH. Fig. 5C is a schematic diagram showing a relative position of a physical time-frequency resource of a PSFCH and a physical time-frequency resource of a PSCCH in an embodiment of the present application, where as shown in fig. 5C, the physical time-frequency resource allocated to the PSFCH and the physical time-frequency resource occupied by the PSCCH occupy a whole time slot (e.g., time slot 0), and the physical time-frequency resource allocated to the PSFCH and the physical time-frequency resource occupied by the PSCCH occupy no overlap with each other in a time domain, that is, the physical time-frequency resource allocated to the PSFCH and the physical time-frequency resource occupied by the PSCCH occupy different side link numbers in the time slot 0, e.g., symbols 0 to 6 are occupied by the PSCCH, and symbols 7 to 13 are occupied by the PSCCH. At this time, SCI on the PSCCH may carry configuration information for the PSFCH. The configuration information may include PSFCH format information, resource location information, and the like. Certainly, the PSCCH may also be an independent PSCCH used for other purposes, and may be used for enabling feedback of a side link after the current feedback, for example, by an instruction, which is not specifically limited in the embodiment of the present application.
S202: and the first terminal equipment sends the SFCI to the second terminal equipment on the determined physical time-frequency resource of the PSFCH.
Here, after determining the physical time-frequency resource allocated to the PSFCH in the PSSCH and/or the PSCCH through S201, the first terminal device sends the PSFCH to the second terminal device on the determined physical time-frequency resource, and the SFCI is carried on the PSFCH.
In some possible embodiments, the second terminal device may learn, according to the configuration of the base station, the physical time-frequency resources allocated to the PSFCH, and receive the SFCI on the physical time-frequency resources; or, the second terminal device may further determine the physical time-frequency resource allocated to the PSFCH according to the indication information sent to the second terminal device by the first terminal device after determining the physical time-frequency resource allocated to the PSFCH in the psch and/or PSCCH through S201, and then the method may further include: the first terminal device sends sidelink control information SCI to the second terminal device, where the SCI is used to indicate the location of the physical time-frequency resource of the PSFCH. Specifically, the SCI may indicate a specific location of the PSFCH in the PSCCH and/or PSCCH, such as a symbol Index (Index) and/or a PRB Index (Index) where a physical time-frequency resource of the PSFCH is located, or a starting location, a number of symbols, and/or a number of PRBs of the physical time-frequency resource of the PSFCH in the PSCCH and/or PSCCH.
Further, in some possible embodiments, the SCI may also be used to indicate whether physical time-frequency resources of the PSCCH and/or PSCCH are occupied by the PSFCH. Specifically, the first terminal device and the second terminal device may determine, through protocol specification, negotiation implementation, and the like, the physical time-frequency resource reserved for the PSFCH at the fixed location of the psch and/or PSCCH, where the physical time-frequency resource reserved for the PSFCH may include a physical time-frequency resource in at least one timeslot. And the first terminal equipment sends SCI to the second terminal equipment according to whether the PSFCH is sent at the fixed position or not, wherein the SCI carries a corresponding identifier or an identification bit so as to identify whether the physical time-frequency resources of the PSSCH and/or the PSCCH are occupied by the PSFCH or not. Accordingly, after receiving the SCI, the second terminal device may determine whether to demodulate data corresponding to the PSFCH, such as the SFCI, the configuration information of the PSFCH, and the like, at the fixed location according to the identifier or the identification bit carried in the SCI.
For example, when the first terminal device is to transmit the PSFCH along with the PSCCH and/or PSCCH, first, the above S201 may be: and the first terminal equipment determines the physical time-frequency resources reserved for the PSFCH in the physical time-frequency resources occupied by the PSSCH and/or the PSCCH. Then, S202 may be: the first terminal device transmits the SFCI on the physical time-frequency resources reserved for the PSFCH. After S201, the first terminal device may also send an SCI to the second terminal device, and carry an identifier or an identification bit, such as 1 bit in the SCI, for identifying that the physical time-frequency resource of the PSCCH and/or PSCCH is occupied by the PSFCH in the SCI. Accordingly, the second terminal device may determine that the PSFCH is multiplexed on the psch and/or PSCCH at a fixed location based on the identifier or identification bits in the SCI, and then receive the SFCI transmitted by the first terminal device at the fixed location. Otherwise, if the SCI indicates that the physical time-frequency resource of the psch and/or PSCCH is not occupied by the PSFCH, the second terminal device may receive the SFCI transmitted by the first terminal device according to the base station configuration or other locations indicated by the first terminal device. Of course, there are also situations where the first terminal device does not need to transmit SFCI to the second terminal device when transmitting psch and/or PSCCH, and then in this case the second terminal device does not need to receive SFCI.
In another embodiment of the present application, the SCI may also indicate whether the physical time-frequency resources of the PSCCH and/or PSCCH are occupied by the PSFCH and the size of the physical time-frequency resources occupied by the PSFCH in the PSCCH and/or PSCCH, such as the number of symbols and/or the number of PRBs. Correspondingly, after receiving the SCI, the second terminal device can determine the specific position of the physical time-frequency resource occupied by the PSFCH in the psch and/or PSCCH according to the indication of the SCI, and then receive the SFCI transmitted by the first terminal device at the position.
Thus, the transmission of the SFCI on the psch and PSCCH is achieved.
In the embodiment of the application, the first terminal device transmits the SFCI by wholly multiplexing the PSFCH on the physical time-frequency resource of the psch and/or PSCCH, so as to transmit the SFCI on the psch and/or PSCCH.
In some possible implementations, an SFCI transmission method is further provided in embodiments of the present application. Fig. 6 is a schematic flow chart diagram of an SFCI transmission method in an embodiment of the present application, and referring to fig. 6, the SFCI transmission method further includes:
s601: the first terminal equipment determines physical time-frequency resources for bearing SFCI from physical time-frequency resources occupied by PSSCH and/or PSCCH;
the physical time-frequency resource used for bearing the SFCI is positioned between the physical time-frequency resources occupied by the adjacent DMRS;
here, in addition to transmitting the SFCI by multiplexing to the psch and/or PSCCH as described in the foregoing embodiments, the first terminal may also carry the SFCI on the physical time-frequency resources between the physical time-frequency resources occupied by the DMRS in the psch and/or PSCCH for transmission.
In this embodiment, fig. 7 is a schematic diagram of relative positions of REs carrying SFCI and psch or DMRS in PSCCH in this embodiment, where reference is made to fig. 7, and the physical time-frequency resources between the physical time-frequency resources occupied by the DMRS in psch and/or PSCCH may include: at least one RE on a symbol adjacent to the symbol where the DMRS is located in physical time frequency resources occupied by the PSSCH or the PSCCH; or at least one RE between REs where the two DMRSs are located in the physical time-frequency resources occupied by the PSSCH or the PSCCH.
The SFCI bearer may occupy one or more slots for one transmission or occupy multiple slots for repeated transmission when the psch and/or PSCCH are transmitted. When the psch and/or PSCCH occupy multiple slots for repeated transmission, fig. 8A is a schematic diagram of a transmission manner of the SFCI in the embodiment of the present application, as shown in fig. 8A, the psch occupies slot 0 to slot 2 for repeated transmission, the psch repeatedly transmits three times, and the DMRS occupies symbol 1 and symbol 3 in the slot in the psch, so that the first terminal device may select a physical time-frequency resource (e.g., symbol 2) with the same position as a physical time-frequency resource carrying the SFCI in each slot, and thus the SFCI also repeatedly transmits three times; still alternatively, fig. 8B is a schematic diagram of a transmission manner of SFCI in this embodiment, referring to fig. 8B, a psch occupies a slot 0 to a slot 2 for repeated transmission, the psch repeatedly transmits three times, a DMRS occupies a symbol 1 and a symbol 3 in the slot in the psch, and a first terminal device may select a physical time-frequency resource (e.g., a symbol 2) as a physical time-frequency resource carrying the SFCI in one slot (e.g., slot 1) of the slot 0 to the slot 2.
S602: and the first terminal equipment sends the SFCI to the second terminal equipment on the determined physical time-frequency resource for carrying the SFCI.
Here, the first terminal device may transmit the SFCI on the physical time-frequency resource after determining the physical time-frequency resource for carrying the SFCI through S601. In this way, after the second terminal device can estimate the channel state of the adjacent RE through the psch and/or the DMRS in the PSCCH, the second terminal device can further decode the SFCI on the adjacent RE, and since the SFCI usually adopts a lower-order modulation method, such as QPSK, the second terminal device can also use the decoded SFCI for channel estimation.
In some possible embodiments, the first terminal device and the second terminal device may know, according to a protocol specification or a pre-negotiation manner, that the physical time-frequency resources between the physical time-frequency resources occupied by the adjacent DMRSs are used for carrying the SFCI, and then, after receiving the PSCCH and/or PSCCH, the second terminal device receives the SFCI on the RB between the physical time-frequency resources occupied by the adjacent DMRSs.
Further, in some possible embodiments, the first terminal device may also send, after S601, an SCI to the second terminal device, where the SCI is used to indicate whether physical time-frequency resources of the PSCCH and/or PSCCH are occupied by the PSFCH. If the SCI indicates that the physical time-frequency resources of the psch and/or PSCCH are occupied by the PSFCH, it indicates that the first terminal device transmits the SFCI on the RB between the physical time-frequency resources occupied by the adjacent DMRSs, and accordingly, the second terminal device may receive the SFCI on the RB between the physical time-frequency resources occupied by the adjacent DMRSs according to the indication of the SCI, otherwise, if the SCI indicates that the physical time-frequency resources of the psch and/or PSCCH are not occupied by the PSFCH, it indicates that the first terminal device does not transmit the SFCI on the RB between the physical time-frequency resources occupied by the adjacent DMRSs, and accordingly, the second terminal device may receive the SFCI transmitted by the first terminal device according to the base station configuration or other positions indicated by the first terminal device. Of course, there are also situations where the first terminal device does not need to transmit SFCI to the second terminal device when transmitting psch and/or PSCCH, and then in this case the second terminal device does not need to receive SFCI.
In the embodiment of the application, the first terminal device multiplexes the SFCI to the physical time-frequency resource between the physical time-frequency resources occupied by the DMRS in the psch and/or PSCCH to transmit, so as to transmit the SFCI on the psch and/or PSCCH.
Based on the foregoing embodiments, in order to achieve the purposes of reducing the delay and enhancing the channel demodulation performance, the first terminal device may further select one of the two SFCI transmission methods for implementation.
Then, fig. 9A is a third schematic flow chart of the SFCI transmission method in the embodiment of the present application, and referring to fig. 9A, before S201 or S601, the SFCI transmission method may further include:
s901: the method comprises the steps that first terminal equipment receives PSFCH resource configuration information sent by a base station or second terminal equipment;
the PSFCH resource configuration information is used for indicating a resource configuration mode of the first terminal equipment; when the resource configuration mode indicated by the PSFCH resource configuration information is the first resource configuration mode, the first SFCI transmission method described in the above embodiment is used to implement: when the resource configuration mode indicated by the PSFCH resource configuration information is the second resource configuration mode, the first SFCI transmission method described in the above embodiment is used for implementation.
S902: and the first terminal equipment determines the physical time-frequency resource of the PSFCH or the physical time-frequency resource for bearing the SFCI from the physical time-frequency resources occupied by the PSSCH and/or the PSCCH according to the resource configuration mode indicated by the PSFCH resource configuration information.
In addition, fig. 9B is a fourth schematic flow chart of the SFCI transmission method in the embodiment of the present application, and as shown in fig. 9B, before S201 or S601, the SFCI transmission method may further include:
s903: the first terminal equipment determines a corresponding resource configuration mode according to a preset condition;
in the application embodiment, the preset condition may include one or more of the following conditions:
when the number of OFDM symbols of the PSFCH is smaller than the first threshold, determining that the resource configuration mode is the first resource configuration mode, that is, implementing the first SFCI transmission method in the above embodiment;
when the PSSCH is transmitted in a slot aggregation manner and/or the number of aggregated slots is greater than the second threshold, determining that the resource configuration manner is the first resource configuration manner, that is, implementing the first SFCI transmission method in the above embodiment;
when the first terminal device itself needs to send the SFCI information within P OFDM symbols, it determines that the resource configuration mode is the first resource configuration mode, that is, the first SFCI transmission method described in the above embodiment is used for implementation;
wherein the first threshold is a positive integer; the first threshold is less than or equal to the number of symbols used for carrying data before the first DMRS symbol of the PSSCH; or the first threshold is less than or equal to the number of OFDM symbols for carrying data in symbols from the next symbol of the last DMRS symbol of the PSSCH to the last symbol of the PSSCH; or the first threshold is equal to the number of OFDM symbols used for carrying data between two adjacent DMRSs in the PSSCH, and the second threshold and the P are positive integers.
Of course, the preset condition may also be other conditions, and the embodiment of the present application is not particularly limited.
In practical application, the base station may indicate a resource configuration mode through a predefined or preconfigured mode, or may indicate a resource configuration mode through a higher layer signaling, such as an RRC signaling; further, the base station may also indicate a resource configuration manner through dynamic signaling, such as DCI.
Or, the first terminal device and the second terminal device may periodically use one resource configuration manner, or carry the indication information of the specific resource configuration manner in the SCI, for example, by adding 1 bit indication information, if 1 bit is set to "0", the first SFCI transmission method is correspondingly adopted, and if 1 bit is set to "1", the second SFC transmission method is correspondingly adopted. If the first terminal device receives the SCI sent by the second terminal device and detects corresponding indication information, the corresponding SFCI transmission method is used for implementation, and the configuration information of the PSFCH is continuously decoded in the configuration information field of the PSFCH, and if the SCI does not contain the PSFCH configuration information or does not have the SCI, the first SFCI transmission method described in the above embodiment is used for implementation.
S904: and the first terminal equipment determines the physical time-frequency resource of the PSFCH or the physical time-frequency resource for bearing the SFCI from the physical time-frequency resources occupied by the PSSCH and/or the PSCCH according to the determined resource configuration mode.
In the embodiment of the present application, the first terminal device selects one of the two SFCI transmission methods to implement through a display indication or an implicit association manner, so as to reduce the time delay and enhance the channel demodulation performance.
Based on the same inventive concept as the method, the embodiment of the present application provides a communication device, which may be an SFCI transmission device in a side link or a chip or a system on a chip in the SFCI transmission device, and may also be a functional module in the SFCI transmission device for implementing the method according to the above embodiment or any possible implementation manner of the above embodiment. The communication apparatus may implement the functions performed by the first terminal device in the foregoing embodiments or in various possible implementations, and the functions may be implemented by hardware executing corresponding software. The hardware or software comprises one or more modules corresponding to the functions. For example, in a possible implementation manner, fig. 10 is a schematic diagram of a first structure of a communication device in an embodiment of the present application, and referring to fig. 10, the communication device 1000 may include: a determining module 1001, configured to determine a physical time-frequency resource of a PSFCH from physical time-frequency resources occupied by a PSSCH and/or a PSCCH, where the PSFCH is used to carry an SFCI; a sending module 1002, configured to send an SFCI to the second terminal device on the determined physical time-frequency resource.
In some possible embodiments, the physical time-frequency resource of the PSFCH includes: the PSSCH and/or PSCCH are/is used for allocating physical time-frequency resources in at least one time unit in the physical time-frequency resources occupied by the PSSCH and/or the PSCCH, the physical time-frequency resources in the at least one time unit are N continuous symbols in a time domain and M continuous PRBs in a frequency domain in each time slot, N is a positive integer smaller than or equal to 14, and M is a positive integer.
In some possible embodiments, the determining module 1001 is configured to determine, as a time domain resource of the PSFCH, first N symbols in a time unit in a physical time-frequency resource occupied by the psch and/or PSCCH; or, the determining module is configured to determine the last N symbols in a time unit in the physical time-frequency resources occupied by the psch and/or PSCCH as the time-domain resources of the PSFCH; or, the determining module 1001 is configured to determine, as a time domain resource of the PSFCH, first K symbols in the physical time frequency resource occupied by the psch and/or PSCCH, where K is a positive integer; or, the determining module 1001 is configured to determine the last K symbols in the physical time-frequency resource occupied by the PSCCH and/or PSCCH as the time-domain resource of the PSFCH.
In some possible embodiments, the determining module 1001 is configured to determine, as the time domain resource of the PSFCH, N symbols corresponding to the PSCCH in the physical time-frequency resources occupied by the PSCCH and/or the PSCCH.
In some possible embodiments, the N symbols corresponding to the PSCCH occupy the same orthogonal frequency division multiplexing, OFDM, symbols as the PSCCH; or the number of the N symbols corresponding to the PSCCH is the same as the number of the OFDM symbols occupied by the PSCCH.
In some possible embodiments, the determining module 1001 is configured to determine, from the physical time-frequency resource of at least one time unit, the physical frequency-domain resource of the PSFCH of the current first terminal device according to the location of the physical frequency-domain resource of the PSCCH or the PSFCH of the previous time.
In some possible embodiments, the determining module 1001 is specifically configured to determine, by the first terminal device, the physical frequency domain resource of the PSFCH of the first terminal device at this time according to the same frequency domain resource offset as the PSCCH or the PSFCH that is previously sent by the second terminal device.
In some possible embodiments, the determining module 1001 is further configured to determine, as the physical time-frequency resource of the PSFCH, the physical time-frequency resource that occupies a time unit together with the PSCCH and that does not overlap with each other in a time domain.
In some possible embodiments, the sending module 1002 is further configured to send sidelink control information SCI to the second terminal device, where the SCI is used to indicate a location of a physical time-frequency resource of the PSFCH.
It should be further noted that, for the specific implementation processes of the determining module 1001 and the sending module 1002, reference may be made to the detailed description of the embodiments in fig. 2 to fig. 5C, and for brevity of the description, no further description is given here.
The sending module 1002 mentioned in the embodiment of the present application may be a sending interface, a sending circuit, a sender, or the like; the determining module 1001 may be one or more processors.
Based on the same inventive concept as the method, the embodiment of the present application provides a communication device, which may be an SFCI transmission device in a side link or a chip or a system on a chip in the SFCI transmission device, and may also be a functional module in the SFCI transmission device for implementing the method according to the above embodiment or any possible implementation manner of the above embodiment. The communication apparatus may implement the functions performed by the first terminal device in the foregoing embodiments or in various possible implementations, and the functions may be implemented by hardware executing corresponding software. The hardware or software comprises one or more modules corresponding to the functions. For example, fig. 11 is a schematic diagram of a second structure of the communication device in the embodiment of the present application, and referring to fig. 11, the communication device 1100 may include: a determining module 1101, configured to determine a physical time-frequency resource used for carrying an SFCI from physical time-frequency resources occupied by the psch and/or PSCCH, where the physical time-frequency resource used for carrying the SFCI is located between physical time-frequency resources occupied by adjacent DMRSs; a sending module 1102, configured to send the SFCI to the second terminal device on the determined physical time-frequency resource.
In some possible embodiments, the above physical time-frequency resource for carrying the SFCI includes: at least one RE on a symbol adjacent to the symbol where the DMRS is located in physical time frequency resources occupied by the PSSCH or the PSCCH; or at least one RE between REs where the two DMRSs are located in the physical time-frequency resources occupied by the PSSCH or the PSCCH.
It should be further noted that, for the specific implementation processes of the determining module 1101 and the sending module 1102, reference may be made to the detailed description of the embodiments in fig. 6 to 9B, and for brevity of the description, no further description is given here;
the sending module 1102 mentioned in the embodiment of the present application may be a sending interface, a sending circuit, a sender, or the like; the determining module 1101 may be one or more processors.
Based on the same inventive concept as the method, the embodiment of the present application provides a communication device, which may be an SFCI transmission device in a side link or a chip or a system on a chip in the SFCI transmission device, and may also be a functional module in the SFCI transmission device for implementing the method according to the above embodiment or any possible implementation manner of the above embodiment. The communication apparatus may implement the functions performed by the second terminal device in the foregoing embodiments or in various possible implementations, and the functions may be implemented by hardware executing corresponding software. The hardware or software comprises one or more modules corresponding to the functions. For example, fig. 12 is a schematic diagram of a third structure of a communication device in the embodiment of the present application, and referring to fig. 12, the communication device 1200 may include: a determining module 1201, configured to determine a physical time-frequency resource of a PSFCH from physical time-frequency resources occupied by a PSSCH and/or a PSCCH, where the PSFCH is used to carry an SFCI; a receiving module 1202, configured to receive an SFCI sent by a first terminal device on a physical time-frequency resource of a PSFCH.
It should be further noted that, for the specific implementation processes of the determining module 1201 and the receiving module 1202, reference may be made to the detailed descriptions of the embodiments in fig. 2 to fig. 5C, and for brevity of the description, no further description is given here.
The receiving module 1202 mentioned in the embodiment of the present application may be a receiving interface, a receiving circuit, a receiver, or the like; the determining module 1201 may be one or more processors.
Based on the same inventive concept as the method, the embodiment of the present application provides a communication device, which may be an SFCI transmission device in a side link or a chip or a system on a chip in the SFCI transmission device, and may also be a functional module in the SFCI transmission device for implementing the method according to the above embodiment or any possible implementation manner of the above embodiment. The communication apparatus may implement the functions performed by the second terminal device in the foregoing embodiments or in various possible implementations, and the functions may be implemented by hardware executing corresponding software. The hardware or software comprises one or more modules corresponding to the functions. For example, fig. 13 is a schematic diagram of a fourth structure of the communication device in the embodiment of the present application, and referring to fig. 13, the communication device 1300 may include: a determining module 1301, configured to determine a physical time-frequency resource located between physical time-frequency resources occupied by DMRSs in psch and/or PSCCH as a physical time-frequency resource used for carrying SFCI; a receiving module 1302, configured to receive the SFCI sent by the first terminal device on the determined physical time-frequency resource.
It should be further noted that, for the specific implementation processes of the determining module 1301 and the receiving module 1302, reference may be made to the detailed description of the embodiments in fig. 6 to fig. 8B, and for brevity of the description, no further description is given here.
The receiving module 1302 mentioned in the embodiment of the present application may be a receiving interface, a receiving circuit, a receiver, or the like; the determining module 1303 may be one or more processors.
Based on the same inventive concept as the method, the embodiment of the present application provides a communication apparatus, which may be a chip or a system on chip in a first terminal device in a sidelink. The communication apparatus may implement the functions performed by the first terminal device in the foregoing embodiment or any possible implementation manner of the foregoing embodiment, where the functions may be implemented by hardware, such as: in a possible implementation manner, fig. 14 is a schematic diagram of a fifth structure of a communication device in an embodiment of the present application, and referring to a solid line in fig. 14, the communication device 1400 may include: a processor 1401 and a communication interface 1402, the processor being operable to support a communication device to implement the functionality relating to the above embodiments or any possible implementation of the above embodiments, for example: the processor may transmit the SFCI to the second terminal device over the determined physical time-frequency resource over the communication interface. In yet another possible implementation, referring to the dashed line in fig. 14, the communication device 1400 may further include a memory 1403, and the memory 1403 is used for storing computer-executable instructions and data necessary for the communication device. When the communication device is running, the processor executes the computer-executable instructions stored in the memory to cause the communication device to perform the SFCI transmission method according to the above embodiment or any one of the possible implementations of the above embodiment.
Based on the same inventive concept as the method described above, the embodiment of the present application provides a communication apparatus, which may be a chip or a system on chip in the second terminal device in the sidelink. The communication apparatus may implement the functions performed by the second terminal device in the foregoing embodiment or any possible implementation manner of the foregoing embodiment, where the functions may be implemented by hardware, such as: in one possible implementation, referring to the solid line in fig. 14, the communication device 1400 may include: a processor 1401 and a communication interface 1402, the processor 1401 may be used to support a communication device to implement the functionality involved in the above embodiments or any of the possible implementations of the above embodiments, such as: the processor 1401 may receive the SFCI transmitted by the first terminal device on the determined physical time-frequency resource via the communication interface 1402. In yet another possible implementation, referring to the dashed line in fig. 14, the communication device 1400 may further include a memory 1403, the memory 1403 being used for storing computer-executable instructions and data necessary for the communication device. When the communication device is running, the processor executes the computer-executable instructions stored in the memory to cause the communication device to perform the SFCI transmission method according to the above embodiment or any one of the possible implementations of the above embodiment.
Based on the same inventive concept as the above method, embodiments of the present application provide a computer-readable storage medium storing instructions for executing the SFCI transmission method according to one or more of the above embodiments when the instructions are executed on a computer.
Based on the same inventive concept as the above method, the present application provides a computer program or a computer program product, which, when executed on a computer, causes the computer to implement the SFCI transmission method according to one or more of the above embodiments.
Those of skill in the art will appreciate that the functions described in connection with the various illustrative logical blocks, modules, and algorithm steps described in the disclosure herein may be implemented as hardware, software, firmware, or any combination thereof. If implemented in software, the functions described in the various illustrative logical blocks, modules, and steps may be stored on or transmitted over as one or more instructions or code on a computer-readable medium and executed by a hardware-based processing unit. The computer-readable medium may include a computer-readable storage medium, which corresponds to a tangible medium, such as a data storage medium, or any communication medium including a medium that facilitates transfer of a computer program from one place to another (e.g., according to a communication protocol). In this manner, a computer-readable medium may generally correspond to (1) a non-transitory tangible computer-readable storage medium, or (2) a communication medium, such as a signal or carrier wave. A data storage medium may be any available medium that can be accessed by one or more computers or one or more processors to retrieve instructions, code and/or data structures for implementing the techniques described herein. The computer program product may include a computer-readable medium.
By way of example, and not limitation, such computer-readable storage media can comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, flash memory, or any other medium that can be used to store desired program code in the form of instructions or data structures and that can be accessed by a computer. Also, any connection is properly termed a computer-readable medium. For example, if the instructions are transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium. It should be understood, however, that computer-readable storage media and data storage media do not include connections, carrier waves, signals, or other transitory media, but are instead directed to non-transitory tangible storage media. Disk and disc, as used herein, includes Compact Disc (CD), laser disc, optical disc, Digital Versatile Disc (DVD), and blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.
The instructions may be executed by one or more processors, such as one or more Digital Signal Processors (DSPs), general purpose microprocessors, Application Specific Integrated Circuits (ASICs), field programmable logic arrays (FPGAs), or other equivalent integrated or discrete logic circuitry. Thus, the term "processor," as used herein may refer to any of the foregoing structure or any other structure suitable for implementation of the techniques described herein. Additionally, in some aspects, the functions described by the various illustrative logical blocks, modules, and steps described herein may be provided within dedicated hardware and/or software modules configured for encoding and decoding, or incorporated in a combined codec. Also, the techniques may be fully implemented in one or more circuits or logic elements.
The techniques of this application may be implemented in a wide variety of devices or apparatuses, including a wireless handset, an Integrated Circuit (IC), or a set of ICs (e.g., a chipset). Various components, modules, or units are described in this application to emphasize functional aspects of means for performing the disclosed techniques, but do not necessarily require realization by different hardware units. Indeed, as described above, the various units may be combined in a codec hardware unit, in conjunction with suitable software and/or firmware, or provided by an interoperating hardware unit (including one or more processors as described above).
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The above description is only an exemplary embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (22)

1. A method for transmitting feedback control information of a side link is characterized by comprising the following steps:
the method comprises the steps that a first terminal device determines physical time-frequency resources of a side link feedback control channel PSFCH from physical time-frequency resources occupied by a side link shared channel PSSCH and/or a side link control channel PSCCH, wherein the PSFCH is used for bearing side link feedback control information SFCI;
the first terminal equipment sends the SFCI to second terminal equipment on the determined physical time-frequency resource;
wherein, the physical time frequency resource of the PSFCH comprises: the PSSCH and/or the PSCCH are/is used for acquiring physical time-frequency resources in at least one time unit in the physical time-frequency resources occupied by the PSSCH and/or the PSCCH, the physical time-frequency resources in the at least one time unit are N continuous symbols in a time domain and M continuous physical resource blocks PRB in a frequency domain in each time unit, the time unit comprises a time slot or Q symbols, N is a positive integer smaller than or equal to 14, M is a positive integer, and Q is a positive integer smaller than 14;
the PSFCH is multiplexed to the physical time-frequency resources occupied by the PSSCH and/or the PSCCH in the form of a whole channel, and the PSFCH keeps unchanged with the previously configured channel format and the size of the time-frequency resources during multiplexing.
2. The method of claim 1, wherein the determining, by the first terminal device, the physical time domain resource of the PSFCH from the physical time-frequency resource occupied by the psch and/or PSCCH comprises:
the first terminal equipment determines the first N symbols in a time unit in the physical time-frequency resources occupied by the PSSCH and/or the PSCCH as the time domain resources configured to the PSFCH; or,
the first terminal equipment determines the last N symbols in a time unit in the physical time-frequency resources occupied by the PSSCH and/or the PSCCH as the time domain resources configured to the PSFCH; or,
the first terminal equipment determines the first K symbols in the physical time-frequency resources occupied by the PSSCH and/or the PSCCH as the time domain resources configured to the PSFCH, wherein K is a positive integer; or,
and the first terminal equipment determines the last K symbols in the physical time-frequency resources occupied by the PSSCH and/or the PSCCH as the time domain resources configured to the PSFCH.
3. The method of claim 1, wherein the determining, by the first terminal device, the physical time domain resource of the PSFCH from the physical time-frequency resource occupied by the psch and/or PSCCH comprises:
and the first terminal equipment determines N symbols corresponding to the PSCCH in the physical time-frequency resources occupied by the PSSCH and/or the PSCCH as the time domain resources configured for the PSFCH.
4. The method of claim 3, wherein the N symbols corresponding to the PSCCH occupy the same Orthogonal Frequency Division Multiplexing (OFDM) symbols as the PSCCH; or the number of the N symbols corresponding to the PSCCH is the same as the number of the OFDM symbols occupied by the PSCCH.
5. The method according to any of claims 1 to 4, wherein the determining, by the first terminal device, physical frequency domain resources of the PSFCH from physical time-frequency resources occupied by the PSSCH and/or the PSCCH comprises:
and the first terminal equipment determines the physical frequency domain resources of the PSFCH of the first terminal equipment at this time from the physical time-frequency resources of the at least one time unit according to the position of the physical frequency domain resources of the PSCCH or the PSFCH at the previous time.
6. The method of claim 5, wherein the determining, by the first terminal device, the physical frequency-domain resource of the PSFCH of the current time from the physical time-frequency resources of the at least one time unit according to the position of the physical frequency-domain resource of the previous PSCCH or PSFCH comprises:
and the first terminal equipment determines the physical frequency domain resource of the PSFCH of the first terminal equipment at this time according to the frequency domain resource offset which is the same as the PSCCH or PSFCH sent by the second terminal equipment at the previous time.
7. The method of claim 1 or 6, further comprising:
and the first terminal equipment determines physical time-frequency resources which occupy a time unit together with the PSCCH and are not overlapped in time domain as physical time-domain resources of the PSFCH.
8. The method according to any one of claims 1 to 4, 6, further comprising:
and the first terminal equipment sends side link control information SCI to the second terminal equipment, wherein the SCI is used for indicating the position of the physical time-frequency resource of the PSFCH.
9. A method for transmitting feedback control information of a side link is characterized by comprising the following steps:
the method comprises the steps that a first terminal device determines physical time-frequency resources used for bearing SFCI from physical time-frequency resources occupied by a side link shared channel PSSCH and/or a side link control channel PSCCH, wherein the physical time-frequency resources used for bearing SFCI are located between physical time-frequency resources occupied by adjacent demodulation reference signals DMRS;
the first terminal equipment sends the SFCI to second terminal equipment on the determined physical time-frequency resource;
wherein, the physical time frequency resource for carrying the SFCI comprises: at least one Resource Element (RE) on a symbol adjacent to a symbol where a DMRS is located in physical time frequency resources occupied by the PSSCH or the PSCCH; or at least one RE between REs where two DMRSs are located in the physical time-frequency resources occupied by the PSSCH or the PSCCH.
10. A method for transmitting feedback control information of a side link is characterized by comprising the following steps:
the second terminal equipment determines the physical time-frequency resource of a side link feedback control channel PSFCH from the physical time-frequency resource occupied by the side link shared channel PSSCH and/or the side link control channel PSCCH, wherein the PSFCH is used for bearing side link feedback control information SFCI;
the second terminal equipment receives the SFCI sent by the first terminal equipment on the physical time-frequency resource of the PSFCH;
wherein, the physical time frequency resource of the PSFCH comprises: the PSSCH and/or the PSCCH are/is used for acquiring physical time-frequency resources in at least one time unit in the physical time-frequency resources occupied by the PSSCH and/or the PSCCH, the physical time-frequency resources in the at least one time unit are N continuous symbols in a time domain and M continuous physical resource blocks PRB in a frequency domain in each time unit, the time unit comprises a time slot or Q symbols, N is a positive integer smaller than or equal to 14, M is a positive integer, and Q is a positive integer smaller than 14;
the PSFCH is multiplexed to the physical time-frequency resources occupied by the PSSCH and/or the PSCCH in the form of a whole channel, and the PSFCH keeps unchanged with the previously configured channel format and the size of the time-frequency resources during multiplexing.
11. A method for transmitting feedback control information of a side link is characterized by comprising the following steps:
the second terminal equipment determines physical time-frequency resources between physical time-frequency resources occupied by adjacent demodulation reference signals DMRS in the side link shared channel PSSCH and/or the side link control channel PSCCH as SFCI used for bearing side link feedback control information;
the second terminal equipment receives the SFCI sent by the first terminal equipment on the determined physical time-frequency resource;
wherein, the physical time frequency resource for carrying the SFCI comprises: at least one Resource Element (RE) on a symbol adjacent to a symbol where a DMRS is located in physical time frequency resources occupied by the PSSCH or the PSCCH; or at least one RE between REs where two DMRSs are located in the physical time-frequency resources occupied by the PSSCH or the PSCCH.
12. A communications apparatus, comprising:
the determining module is used for determining physical time-frequency resources of a side link feedback control channel PSFCH from physical time-frequency resources occupied by a side link shared channel PSSCH and/or a side link control channel PSCCH, wherein the PSFCH is used for bearing side link feedback control information SFCI;
a sending module, configured to send the SFCI to a second terminal device on the determined physical time-frequency resource; wherein, the physical time frequency resource of the PSFCH comprises: the PSSCH and/or the PSCCH are/is used for acquiring physical time-frequency resources in at least one time unit in the physical time-frequency resources occupied by the PSSCH and/or the PSCCH, the physical time-frequency resources in the at least one time unit are N continuous symbols in a time domain and M continuous physical resource blocks PRB in a frequency domain in each time unit, N is a positive integer smaller than or equal to 14, and M is a positive integer;
the PSFCH is multiplexed to the physical time-frequency resources occupied by the PSSCH and/or the PSCCH in the form of a whole channel, and the PSFCH keeps unchanged with the previously configured channel format and the size of the time-frequency resources during multiplexing.
13. The apparatus of claim 12, wherein the determining module is configured to determine, as the time domain resource configured to the PSFCH, the first N symbols in a time unit of the physical time-frequency resources occupied by the psch and/or the PSCCH; or,
the determining module is further configured to determine the last N symbols in a time unit in the physical time-frequency resource occupied by the PSCCH and/or the PSCCH as the time-domain resource configured to the PSFCH; or,
the determining module is further configured to determine first K symbols in the physical time-frequency resource occupied by the PSCCH and/or the PSCCH as a time-domain resource configured to the PSFCH, where K is a positive integer; or,
the determining module is further configured to determine the last K symbols in the physical time-frequency resource occupied by the PSCCH and/or the PSCCH as the time-domain resource configured to the PSFCH.
14. The apparatus of claim 12, wherein the determining module is configured to determine, as the time domain resource configured to the PSFCH, N symbols corresponding to the PSCCH in the physical time-frequency resources occupied by the PSCCH and/or the PSCCH.
15. The apparatus of claim 14, wherein the N symbols corresponding to the PSCCH occupy the same orthogonal frequency division multiplexing, OFDM, symbols as the PSCCH; or the number of the N symbols corresponding to the PSCCH is the same as the number of the OFDM symbols occupied by the PSCCH.
16. The apparatus according to any of claims 12 to 15, wherein the determining module is configured to determine the physical frequency-domain resource of the PSFCH of the current first terminal device from the physical time-frequency resource of the at least one time unit according to the location of the physical frequency-domain resource of the PSCCH or PSFCH of the previous time.
17. The apparatus of claim 16, wherein the determining module is specifically configured to determine, by the first terminal device, the physical frequency-domain resource of the PSFCH of the first terminal device at this time according to a frequency-domain resource offset that is the same as a frequency-domain resource offset of a PSCCH or a PSFCH that is previously sent by the second terminal device.
18. The apparatus according to any of claims 12 or 17, wherein the determining module is further configured to determine, as the physical time-frequency resource of the PSFCH, a physical time-frequency resource that occupies a time unit together with the PSCCH and that does not overlap with each other in time domain.
19. The apparatus according to any of claims 12 to 15 and 17, wherein the sending module is further configured to send sidelink control information SCI to the second terminal device, where the SCI is used for a location of a physical time-frequency resource of the PSFCH.
20. A communications apparatus, comprising:
the device comprises a determining module, a judging module and a judging module, wherein the determining module is used for determining physical time-frequency resources used for bearing SFCI from physical time-frequency resources occupied by a side link shared channel PSSCH and/or a side link control channel PSCCH, and the physical time-frequency resources used for bearing SFCI are positioned between physical time-frequency resources occupied by adjacent demodulation reference signals DMRS;
a sending module, configured to send the SFCI to a second terminal device on the determined physical time-frequency resource; wherein, the physical time frequency resource for carrying the SFCI comprises: at least one Resource Element (RE) on a symbol adjacent to a symbol where a DMRS is located in physical time frequency resources occupied by the PSSCH or the PSCCH; or at least one RE between REs where two DMRSs are located in the physical time-frequency resources occupied by the PSSCH or the PSCCH.
21. A communications apparatus, comprising:
the determining module is used for determining physical time-frequency resources of a side link feedback control channel PSFCH from physical time-frequency resources occupied by a side link shared channel PSSCH and/or a side link control channel PSCCH, wherein the PSFCH is used for bearing side link feedback control information SFCI;
a receiving module, configured to receive, on a physical time-frequency resource of the PSFCH, the SFCI sent by a first terminal device;
wherein, the physical time frequency resource of the PSFCH comprises: the PSSCH and/or the PSCCH are/is used for acquiring physical time-frequency resources in at least one time unit in the physical time-frequency resources occupied by the PSSCH and/or the PSCCH, the physical time-frequency resources in the at least one time unit are N continuous symbols in a time domain and M continuous physical resource blocks PRB in a frequency domain in each time unit, the time unit comprises a time slot or Q symbols, N is a positive integer smaller than or equal to 14, M is a positive integer, and Q is a positive integer smaller than 14;
the PSFCH is multiplexed to the physical time-frequency resources occupied by the PSSCH and/or the PSCCH in the form of a whole channel, and the PSFCH keeps unchanged with the previously configured channel format and the size of the time-frequency resources during multiplexing.
22. A communications apparatus, comprising:
the determining module is used for determining, by the second terminal device, physical time-frequency resources between physical time-frequency resources occupied by adjacent demodulation reference signals DMRS in the sidelink shared channel PSSCH and/or the sidelink control channel PSCCH as SFCI (side link feedback control information);
a receiving module, configured to receive, on the determined physical time-frequency resource, the SFCI sent by the first terminal device;
wherein, the physical time frequency resource for carrying the SFCI comprises: at least one Resource Element (RE) on a symbol adjacent to a symbol where a DMRS is located in physical time frequency resources occupied by the PSSCH or the PSCCH; or at least one RE between REs where two DMRSs are located in the physical time-frequency resources occupied by the PSSCH or the PSCCH.
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