WO2022111478A1 - 一种通信方法、装置、芯片、存储介质及程序产品 - Google Patents

一种通信方法、装置、芯片、存储介质及程序产品 Download PDF

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Publication number
WO2022111478A1
WO2022111478A1 PCT/CN2021/132483 CN2021132483W WO2022111478A1 WO 2022111478 A1 WO2022111478 A1 WO 2022111478A1 CN 2021132483 W CN2021132483 W CN 2021132483W WO 2022111478 A1 WO2022111478 A1 WO 2022111478A1
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Prior art keywords
format
control information
specified message
field
time
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PCT/CN2021/132483
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English (en)
French (fr)
Inventor
彭兰
李雪茹
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华为技术有限公司
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Priority to EP21896979.8A priority Critical patent/EP4236539A4/en
Priority to US18/254,097 priority patent/US20240015744A1/en
Publication of WO2022111478A1 publication Critical patent/WO2022111478A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/25—Control channels or signalling for resource management between terminals via a wireless link, e.g. sidelink
    • 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
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • H04L1/1819—Hybrid protocols; Hybrid automatic repeat request [HARQ] with retransmission of additional or different redundancy
    • 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
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1864—ARQ related signaling
    • 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
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1893—Physical mapping arrangements
    • 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
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • 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
    • 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
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present application relates to the field of communication technologies, and in particular, to a communication method, device, chip, storage medium and program product.
  • SL communication technology is an important branch of cellular IoT technology. It is a communication technology for direct connection between terminals, also known as Device to Device Communication (D2D). This communication technology has created broad application prospects for IoT applications.
  • V2X Vehicle-to-everything
  • V2X Vehicle-to-everything
  • Spectrum resources occupied by sidelinks can be divided into two categories: licensed spectrum (License Spectrum) and unlicensed spectrum (Unlicense Spectrum). Among them, the licensed spectrum is strictly restricted and protected, and only terminals that meet the specifications are allowed to access. When the sidelink occupies the licensed spectrum (License Spectrum), it is Radio, NR) network spectrum resources are coordinated, which may result in limited usage scenarios and the rate cannot be further improved.
  • licensed spectrum License Spectrum
  • Unlicense Spectrum unlicensed spectrum
  • Unlicensed spectrum is open and can be used to improve performance and speed; the unlicensed nature of unlicensed spectrum enables all communication systems to transmit data on it, in order to regulate fairness and balance performance without causing unnecessary interference , the standard defines the technical specifications of channel competition, so that the behavior of the device when occupying the unlicensed spectrum is as expected; because the terminal needs to perform channel competition to send data when occupying the unlicensed spectrum, if the channel competition fails, the terminal may not have the opportunity to send data .
  • the terminal When the sidelink occupies the unlicensed spectrum (Sidelink Unlicense, SL-U), the terminal has many important messages carried in the data channel and needs to be fed back in time to ensure the performance of the communication system and the effective operation of the communication system. However, if The failure of channel competition may cause these important messages to fail to be fed back in time.
  • Sidelink Unlicense Sidelink Unlicense
  • an embodiment of the present application provides a communication method; the method includes: a first device sending first control information and second control information to a second device, where the first control information includes a first field or a second field At least one of the first field or the second field indicates the format of the first control information, and at least one of the first field or the second field indicates the format of the second control information;
  • the format includes at least a first format and a second format, the first format indicates the time-frequency resource of the specified message fed back by the second device, and the second format indicates the first device to send the transmission information of the data channel;
  • the format of the second control information at least includes The third format and the fourth format, the third format instructs the second device to feed back the redundant version of the specified message, and the fourth format instructs the first device to send the redundant version of the data channel; where the first control information is the first In a format, when the second control information is in the third format, the first device receives the specified message fed back by the second device on the time-frequency resource.
  • the first device sends the first control information and the second control information to the second device, wherein the first control information includes at least one of a first field or a second field, and the first field or the second field At least one of the fields indicates the format of the first control information, and at least one of the first field or the second field indicates the format of the second control information; the first device indicates the second control information through the first format of the first control information
  • the device feeds back the time-frequency resource of the specified message, instructs the second device to feed back the redundant version of the specified message through the third format of the second control information, and receives the specified message fed back by the second device on the time-frequency resource; in this way, the first By reserving time-frequency resources for a specified message, a device ensures timely and successful feedback of the specified message and improves system performance.
  • the first device directly receives the specified message fed back by the second device on the time-frequency resource, without the need for The time-frequency resource where the specified message is located is blindly detected, and control information is not required to be detected, which saves the power consumption of the first device.
  • the above-mentioned first format further includes: at least one field indicating the time-frequency resource.
  • the first format includes at least one field indicating the time-frequency resource of the specified message, and the first device reserves the time-frequency resource for the second device to feed back the specified message through this field, ensuring that the specified message can be used in the time-frequency resource. on-time and successful feedback.
  • the above-mentioned third format further includes: at least one field indicating a specified message, wherein the specified message includes: channel state information , CSI), at least one of auxiliary resource selection information, positioning information, and power control auxiliary information.
  • the first format includes at least one field indicating a designated message, and the first device indicates the content of the designated message to be fed back by the second device through this field, thereby ensuring channel state information, auxiliary resource selection information, positioning information, and power control.
  • Designated messages such as auxiliary information can be fed back effectively and in a timely manner to improve system performance.
  • the above-mentioned first format further includes: at least one of modulation and coding and demodulation pilot information used when instructing the second device to feed back the above-mentioned specified message field.
  • the first format includes at least one field for instructing the second device to use modulation, coding and demodulation pilot information when feeding back the specified message; the first device instructs the second device to use the modulation, coding and demodulation through this field.
  • the pilot information feeds back the designated message; thereby ensuring timely and successful feedback of the designated message.
  • the above-mentioned first format further includes: at least one field indicating a period during which the second device feeds back the specified message.
  • the first format includes at least one field indicating a period for the second device to feed back the specified message, and the first device uses the field to instruct the second device to feed back the specified message according to the period, thereby ensuring the effective operation of the system.
  • the above-mentioned third format further includes: all bits of the source identifiers of the first control information and the second control information, and the first control information and All bits of the destination identification of the second control information.
  • the third format includes: all bits of the source identifiers of the first control information and the second control information, and all bits of the destination identifiers of the first control information and the second control information.
  • the first device can clearly indicate the source identifier and destination identifier of the first control information and the second control information through this field, thereby ensuring that the object expected by the first device can timely and successfully feed back the specified message.
  • the above-mentioned time-frequency resources satisfy the time processing capability of the second device for the specified message.
  • the time-frequency resources reserved by the first device for the second device satisfy the time processing capability of the second device for the specified message, thereby ensuring that the second device has Timely process the specified message, and feed back the processed specified message in a timely and successful manner to ensure the effective operation of the system.
  • the foregoing first control information or second control information includes: a side link Control information (Sidelink Control Information, SCI), the above-mentioned data channel includes: sidelink physical shared channel (Physical Sidelink Share Channel, PSSCH).
  • SCI Sidelink Control Information
  • PSSCH Physical Sidelink Share Channel
  • the first control information or the second control information may be sidelink control information
  • the data channel may be a sidelink physical shared channel, that is, the first device communicates with the second device through the sidelink,
  • the first device ensures timely and successful feedback of the designated message and improves the performance of the SL-U communication system.
  • an embodiment of the present application provides a communication method; the method includes: a second device receives first control information and second control information sent by a first device; the first control information includes a first field or a second At least one of the fields, at least one of the first field or the second field indicates the format of the first control information, at least one of the first field or the second field indicates the format of the second control information; the format of the first control information It includes at least a first format and a second format, the first format indicates the time-frequency resource of the specified message fed back by the second device, and the second format indicates that the first device sends the transmission information of the data channel; the format of the second control information includes at least the first format.
  • the third format indicates the redundant version of the specified message fed back by the second device
  • the fourth format indicates the redundant version of the data channel sent by the first device
  • the second device receives the first control information and the second control information sent by the first device, wherein the first control information includes at least one of the first field or the second field, and the first field or the second field At least one of the two fields indicates the format of the first control information, and at least one of the first field or the second field indicates the format of the second control information; the first format of the first control information indicates the second device feedback designation The time-frequency resource of the message, the third format of the second control information indicates that the second device feeds back the redundancy version of the specified message, when the first control information is in the first format and the second control information is in the third format, the second The device feeds back the specified message to the first device on the time-frequency resource; in this way, the second device feeds back the specified message on the reserved time-frequency resource, thereby ensuring timely and successful feedback of the specified message, improving system performance, and at the same time , when the second device sends the specified message, it does not need to select time-frequency resources through channel competition, nor does it need
  • the above-mentioned first format further includes: at least one field indicating time-frequency resources.
  • the first format includes at least one field indicating the time-frequency resource of the specified message
  • the second device determines the time-frequency resource reserved for the specified message through the field, and feeds back the specified message on the time-frequency resource, thus, it is ensured that the specified message is fed back in time and successfully.
  • the above-mentioned third format further includes: at least one field indicating a designated message, wherein the designated message includes: channel state information, auxiliary resource selection information , at least one item of positioning information, and power control assistance information.
  • the first format includes at least one field indicating a designated message
  • the second device determines the content of the designated message to be fed back through this field, thereby ensuring channel state information, auxiliary resource selection information, positioning information, power control auxiliary information, etc.
  • the specified message can provide effective and timely feedback and improve system performance.
  • the above-mentioned first format further includes: at least one field indicating modulation and coding and demodulation pilot information used when the second device feeds back the specified message .
  • the first format includes at least one field for instructing the second device to use modulation coding and demodulation pilot information when feeding back the specified message; the second device determines the modulation coding and demodulation pilot information used when sending the specified message through this field.
  • the pilot information is demodulated, and the designated message is fed back through the modulation, coding and demodulation pilot information, thereby ensuring timely and successful feedback of the designated message.
  • the above-mentioned first format further includes: at least one field indicating a period during which the second device feeds back the specified message.
  • the first format includes at least one field indicating the period for the second device to feed back the specified message
  • the second device determines the period for feeding back the specified message through this field, and feeds back the specified message in time according to the period, so that the specified message can be fed back in time.
  • the above-mentioned third format further includes: all bits of the source identifiers of the first control information and the second control information, and the first control information and All bits of the destination identification of the second control information.
  • the third format includes: all bits of the source identifiers of the first control information and the second control information, and all bits of the destination identifiers of the first control information and the second control information.
  • the second device can determine the source identifier and destination identifier of the first control information and the second control information, thereby determining that the second device is the object expected by the first device, and timely and successfully feeding back the specified message.
  • the above method further includes: when the destination identifier is different from the self identifier of the second device, the second The device does not use the above time-frequency resources.
  • the second device can use this field to determine the source identifier and destination identifier of the first control information and the second control information.
  • the second device does not use the Time-frequency resources, so that the reserved time-frequency resources can be avoided to ensure that the designated message is timely and successfully fed back on the time-frequency resources.
  • the time-frequency resource satisfies the time processing capability of the second device for the specified message.
  • the reserved time-frequency resources satisfy the time processing capability of the second device for the specified message, thereby ensuring that the second device has time to process the specified message, and The processed designated messages are timely and successfully fed back to ensure the effective operation of the system.
  • an embodiment of the present application provides a communication method; the method includes: a first device sends first control information, second control information and a data channel to a second device; the first control information instructs the first device to send Transmission information of the data channel; the first control information includes at least one field indicating the format of the second control information; the format of the second control information includes at least a first format and a second format, and the first format indicates that the second device feeds back the specified message time-frequency resource, the second format instructs the first device to send the redundant version of the data channel; when the second control information is in the first format, the first device receives the specified message sent by the second device and instructs the second device to send the The control information of the transmission information of the designated message, and the control information of instructing the second device to send the redundant version of the designated message; wherein, the designated message occupies part or all of the time-frequency resources.
  • the first device sends the first control information, the second control information and the data channel to the second device; the first control information instructs the first device to send the transmission information of the data channel; the first control information includes instructions for the second control at least one field of the format of the information; the first device instructs the second device to feed back the time-frequency resources of the specified message through the first format of the second control information; and receives the specified message sent by the second device and instructs the second device to send the specified message
  • the control information of the transmission information of the message, and the control information of instructing the second device to send the redundant version of the designated message, the sixth control information is used to instruct the second device to send the redundant version of the designated message, and the designated message occupies part or All the time-frequency resources; in this way, the first device reserves time-frequency resources for the specified message, thereby ensuring timely and successful feedback of the specified message, and improving system performance.
  • the above-mentioned first format further includes: at least one field indicating the above-mentioned time-frequency resource.
  • the first format includes at least one field indicating the time-frequency resource of the specified message, and the first device reserves the time-frequency resource for the second device to feed back the specified message through this field, ensuring that the specified message can be used in the time-frequency resource. Part or all of the timely and successful feedback.
  • the above-mentioned first format further includes: at least one field indicating a designated message, wherein the designated message includes: channel state information, auxiliary resource selection information , at least one item of positioning information, and power control assistance information.
  • the first format includes at least one field indicating a designated message, and the first device indicates the content of the designated message to be fed back by the second device through this field, thereby ensuring channel state information, auxiliary resource selection information, positioning information, and power control.
  • Designated messages such as auxiliary information can be fed back effectively and in a timely manner to improve system performance.
  • the above-mentioned first format further includes: at least one field indicating a period during which the second device feeds back the specified message.
  • the first format includes at least one field indicating a period for the second device to feed back the specified message, and the first device uses the field to instruct the second device to feed back the specified message according to the period, thereby ensuring the effective operation of the system.
  • the above-mentioned time-frequency resources satisfy the time processing capability of the second device for the specified message.
  • the time-frequency resources reserved by the first device for the second device satisfy the time processing capability of the second device for the specified message, thereby ensuring that the second device has Timely process the specified message, and feed back the processed specified message in a timely and successful manner to ensure the effective operation of the system.
  • the first control information or the second control information includes: sidelink control information
  • the data channel includes: sidelink physical sharing channel.
  • the first control information or the second control information may be sidelink control information
  • the data channel may be a sidelink physical shared channel, that is, the first device communicates with the second device through the sidelink,
  • the first device ensures timely and successful feedback of the designated message and improves the performance of the SL-U communication system.
  • an embodiment of the present application provides a communication method; the method includes: the second device receives first control information, second control information and a data channel sent by the first device; the first control information indicates the first device Transmission information of the data channel is sent; the first control information includes at least one field indicating the format of the second control information; the format of the second control information includes at least a first format and a second format, and the first format indicates that the second device feeds back a specified message The second format indicates that the first device sends a redundant version of the data channel.
  • the second device When the second control information is in the first format, the second device sends the specified message to the first device, instructs the second device to send the control information of the transmission information of the specified message, and instructs the second device to send the control of the redundancy version of the specified message information; wherein, the specified message occupies part or all of the time-frequency resources.
  • the second device receives the first control information, the second control information and the data channel sent by the first device; the first control information instructs the first device to send transmission information of the data channel; the first control information includes instructions that indicate the second at least one field of the format of the control information; the first format of the second control information is used to instruct the second device to feed back the time-frequency resources of the specified message; when the second control information is in the first format, the second device sends the first format to the second device.
  • the device sends the designated message, the control information instructing the second device to send the transmission information of the designated message, and the control information instructing the second device to send the redundant version of the designated message, and the designated message occupies part or all of the time-frequency resources; , the second device feeds back the specified message on some or all of the reserved time-frequency resources, so as to ensure timely and successful feedback of the specified message and improve system performance; at the same time, when the second device sends the specified message, it does not need to pass the channel Competitive selection of time-frequency resources saves power consumption of the second device.
  • the above-mentioned first format further includes: at least one field indicating the above-mentioned time-frequency resource.
  • the first format includes at least one field indicating the time-frequency resource of the specified message
  • the second device determines the time-frequency resource reserved for the specified message through the field, and feeds back the specified message on the time-frequency resource, thus, it is ensured that the specified message is fed back in time and successfully.
  • the above-mentioned first format further includes: at least one field indicating a designated message, wherein the designated message includes: channel state information, auxiliary resource selection information , at least one item of positioning information, and power control assistance information.
  • the first format includes at least one field indicating a designated message
  • the second device determines the content of the designated message to be fed back through this field, thereby ensuring channel state information, auxiliary resource selection information, positioning information, power control auxiliary information, etc.
  • the specified message can provide effective and timely feedback and improve system performance.
  • the above-mentioned first format further includes: at least one field indicating a period during which the second device feeds back the specified message.
  • the first format includes at least one field indicating the period for the second device to feed back the specified message
  • the second device determines the period for feeding back the specified message through this field, and feeds back the specified message in time according to the period, so that the specified message can be fed back in time.
  • the above-mentioned time-frequency resources satisfy the time processing capability of the second device for the specified message.
  • the reserved time-frequency resources satisfy the time processing capability of the second device for the specified message, thereby ensuring that the second device has time to process the specified message, and The processed designated messages are timely and successfully fed back to ensure the effective operation of the system.
  • an embodiment of the present application provides a communication apparatus, the apparatus includes: a first module, where the first module is used for: a first device sends first control information and second control information to a second device, the first A control information contains at least one of a first field or a second field, at least one of the first field or the second field indicates the format of the first control information, and at least one of the first field or the second field indicates the second control information
  • the format of the first control information includes at least a first format and a second format, the first format instructs the second device to feed back the time-frequency resources of the specified message, and the second format instructs the first device to send the transmission information of the data channel;
  • the format of the second control information includes at least a third format and a fourth format, the third format indicates the redundant version of the specified message fed back by the second device, and the fourth format indicates the redundant version of the data channel sent by the first device;
  • the second module the The second module is configured to: when the first control information is in the first
  • the first device sends the first control information and the second control information to the second device, wherein the first control information includes at least one of a first field or a second field, and the first field or the second field At least one of the fields indicates the format of the first control information, and at least one of the first field or the second field indicates the format of the second control information; the first device indicates the second control information through the first format of the first control information
  • the device feeds back the time-frequency resource of the specified message, instructs the second device to feed back the redundant version of the specified message through the third format of the second control information, and receives the specified message fed back by the second device on the time-frequency resource; in this way, the first By reserving time-frequency resources for a specified message, a device ensures timely and successful feedback of the specified message and improves system performance.
  • the first device directly receives the specified message fed back by the second device on the time-frequency resource, without the need for The time-frequency resource where the specified message is located is blindly detected, and control information is not required to be detected, which saves the power consumption of the first device.
  • the above-mentioned first format further includes: at least one field indicating the time-frequency resource.
  • the first format includes at least one field indicating the time-frequency resource of the specified message, and the first device reserves the time-frequency resource for the second device to feed back the specified message through this field, ensuring that the specified message can be used in the time-frequency resource. on-time and successful feedback.
  • the above-mentioned third format further includes: at least one field indicating a designated message, wherein the designated message includes: channel state information, auxiliary resource selection at least one of information, positioning information, and power control assistance information.
  • the first format includes at least one field indicating a designated message, and the first device indicates the content of the designated message to be fed back by the second device through this field, thereby ensuring channel state information, auxiliary resource selection information, positioning information, and power control.
  • Designated messages such as auxiliary information can be fed back effectively and in a timely manner to improve system performance.
  • the first format further includes: instructing the second device to use at least one of modulation and coding and demodulation pilot information to be used when feeding back the specified message field.
  • the first format includes at least one field for instructing the second device to use modulation, coding and demodulation pilot information when feeding back the specified message; the first device instructs the second device to use the modulation, coding and demodulation through this field.
  • the pilot information feeds back the designated message; thereby ensuring timely and successful feedback of the designated message.
  • the above-mentioned first format further includes: at least one field indicating a period during which the second device feeds back the specified message.
  • the first format includes at least one field indicating a period for the second device to feed back the specified message, and the first device uses the field to instruct the second device to feed back the specified message according to the period, thereby ensuring the effective operation of the system.
  • the above-mentioned third format further includes: all bits of the source identifiers of the first control information and the second control information, and the first control information and All bits of the destination identification of the second control information.
  • the third format includes: all bits of the source identifiers of the first control information and the second control information, and all bits of the destination identifiers of the first control information and the second control information.
  • the first device can clearly indicate the source identifier and destination identifier of the first control information and the second control information through this field, thereby ensuring that the object expected by the first device can timely and successfully feed back the specified message.
  • the above-mentioned time-frequency resources satisfy the time processing capability of the second device for the specified message.
  • the time-frequency resources reserved by the first device for the second device satisfy the time processing capability of the second device for the specified message, thereby ensuring that the second device has Timely process the specified message, and feed back the processed specified message in a timely and successful manner to ensure the effective operation of the system.
  • the foregoing first control information or second control information includes: a side link Control information
  • the above-mentioned data channel includes: sidelink physical shared channel.
  • the first control information or the second control information may be sidelink control information
  • the data channel may be a sidelink physical shared channel, that is, the first device communicates with the second device through the sidelink,
  • the first device ensures timely and successful feedback of the designated message and improves the performance of the SL-U communication system.
  • an embodiment of the present application provides a communication apparatus, the apparatus includes: a first module, where the first module is configured to: a second device receives first control information and second control information sent by the first device;
  • the first control information includes at least one of the first field or the second field, at least one of the first field or the second field indicates the format of the first control information, and at least one of the first field or the second field indicates the second
  • the format of the control information includes at least a first format and a second format, the first format instructs the second device to feed back the time-frequency resource of the specified message, and the second format instructs the first device to send the transmission information of the data channel;
  • the format of the second control information includes at least a third format and a fourth format, the third format indicates the redundant version of the specified message fed back by the second device, and the fourth format indicates the redundant version of the data channel sent by the first device;
  • the second module The second module is configured to: when the first control information is in the first format and the second control information
  • the second device receives the first control information and the second control information sent by the first device, wherein the first control information includes at least one of the first field or the second field, and the first field or the second field At least one of the two fields indicates the format of the first control information, and at least one of the first field or the second field indicates the format of the second control information; the first format of the first control information indicates the second device feedback designation The time-frequency resource of the message, the third format of the second control information indicates that the second device feeds back the redundancy version of the specified message, when the first control information is in the first format and the second control information is in the third format, the second The device feeds back the specified message to the first device on the time-frequency resource; in this way, the second device feeds back the specified message on the reserved time-frequency resource, thereby ensuring timely and successful feedback of the specified message, improving system performance, and at the same time , when the second device sends the specified message, it does not need to select time-frequency resources through channel competition, nor does it need
  • the above-mentioned first format further includes: at least one field indicating the above-mentioned time-frequency resource.
  • the first format includes at least one field indicating the time-frequency resource of the specified message
  • the second device determines the time-frequency resource reserved for the specified message through the field, and feeds back the specified message on the time-frequency resource, thus, it is ensured that the specified message is fed back in time and successfully.
  • the above-mentioned third format further includes: at least one field indicating a designated message, wherein the designated message includes: channel state information, auxiliary resource selection information , at least one item of positioning information, and power control assistance information.
  • the first format includes at least one field indicating a designated message
  • the second device determines the content of the designated message to be fed back through this field, thereby ensuring channel state information, auxiliary resource selection information, positioning information, power control auxiliary information, etc.
  • the specified message can provide effective and timely feedback and improve system performance.
  • the above-mentioned first format further includes: at least one field indicating modulation and coding and demodulation pilot information used when the second device feeds back the specified message .
  • the first format includes at least one field for instructing the second device to use modulation coding and demodulation pilot information when feeding back the specified message; the second device determines the modulation coding and demodulation pilot information used when sending the specified message through this field.
  • the pilot information is demodulated, and the designated message is fed back through the modulation, coding and demodulation pilot information, thereby ensuring timely and successful feedback of the designated message.
  • the above-mentioned first format further includes: at least one field indicating a period during which the second device feeds back the specified message.
  • the first format includes at least one field indicating the period for the second device to feed back the specified message
  • the second device determines the period for feeding back the specified message through this field, and feeds back the specified message in time according to the period, so that the specified message can be fed back in time.
  • the above-mentioned third format further includes: all bits of the source identifiers of the first control information and the second control information, and the first control information and All bits of the destination identification of the second control information.
  • the third format includes: all bits of the source identifiers of the first control information and the second control information, and all bits of the destination identifiers of the first control information and the second control information.
  • the second device can determine the source identifier and destination identifier of the first control information and the second control information, thereby determining that the second device is the object expected by the first device, and timely and successfully feeding back the specified message.
  • the above-mentioned second module is further configured to: when the destination identifier is different from the self identifier of the second device , the second device does not use the above time-frequency resources.
  • the second device can use this field to determine the source identifier and destination identifier of the first control information and the second control information.
  • the second device does not use the Time-frequency resources, so that the reserved time-frequency resources can be avoided to ensure that the designated message is timely and successfully fed back on the time-frequency resources.
  • the above-mentioned time-frequency resources satisfy the time processing capability of the second device for a specified message.
  • the reserved time-frequency resources satisfy the time processing capability of the second device for the specified message, thereby ensuring that the second device has time to process the specified message, and The processed designated messages are timely and successfully fed back to ensure the effective operation of the system.
  • an embodiment of the present application provides a communication apparatus, the apparatus includes: a first module, where the first module is used for: a first device to send first control information, second control information and data to a second device channel; the first control information instructs the first device to send transmission information of the data channel; the first control information includes at least one field indicating the format of the second control information; the format of the second control information includes at least the first format and the second format, The first format instructs the second device to feed back the time-frequency resource of the designated message, and the second format instructs the first device to send the redundant version of the data channel; the second module, the second module is used for: when the second control information is the first In a format, the first device receives the specified message sent by the second device, the control information that instructs the second device to send the transmission information of the specified message, and the control information that instructs the second device to send the redundant version of the specified message; wherein, the specified message Occupies part or all of the time-frequency resources.
  • the first device sends the first control information, the second control information and the data channel to the second device; the first control information instructs the first device to send the transmission information of the data channel; the first control information includes instructions to the second device at least one field of the format of the control information; the first device instructs the second device to feed back the time-frequency resources of the specified message through the first format of the second control information; and receives the specified message sent by the second device and instructs the second device to send the specified message.
  • the control information of the transmission information of the specified message, and the control information of instructing the second device to send the redundant version of the specified message, the sixth control information is used to instruct the second device to send the redundant version of the specified message, and the specified message occupies part Or all of the time-frequency resources; in this way, the first device reserves time-frequency resources for the specified message, thereby ensuring timely and successful feedback of the specified message, and improving system performance.
  • the above-mentioned first format further includes: at least one field indicating the above-mentioned time-frequency resource.
  • the first format includes at least one field indicating the time-frequency resource of the specified message, and the first device reserves the time-frequency resource for the second device to feed back the specified message through this field, ensuring that the specified message can be used in the time-frequency resource. Part or all of the timely and successful feedback.
  • the above-mentioned first format further includes: at least one field indicating a designated message, wherein the designated message includes: channel state information, auxiliary resource selection information , at least one item of positioning information, and power control assistance information.
  • the first format includes at least one field indicating a designated message, and the first device indicates the content of the designated message to be fed back by the second device through this field, thereby ensuring channel state information, auxiliary resource selection information, positioning information, and power control.
  • Designated messages such as auxiliary information can be fed back effectively and in a timely manner to improve system performance.
  • the above-mentioned first format further includes: at least one field indicating a period during which the second device feeds back the specified message.
  • the first format includes at least one field indicating a period for the second device to feed back the specified message, and the first device uses the field to instruct the second device to feed back the specified message according to the period, thereby ensuring the effective operation of the system.
  • the above-mentioned time-frequency resources satisfy the time processing capability of the second device for the specified message.
  • the time-frequency resources reserved by the first device for the second device satisfy the time processing capability of the second device for the specified message, thereby ensuring that the second device has Timely process the specified message, and feed back the processed specified message in a timely and successful manner to ensure the effective operation of the system.
  • the first control information or the second control information includes: sidelink control information
  • the data channel includes: sidelink physical sharing channel.
  • the first control information or the second control information may be sidelink control information
  • the data channel may be a sidelink physical shared channel, that is, the first device communicates with the second device through the sidelink,
  • the first device ensures timely and successful feedback of the designated message and improves the performance of the SL-U communication system.
  • an embodiment of the present application provides a communication apparatus, the apparatus includes: a first module, where the first module is configured to: a second device receives first control information, second control information and data channel; the first control information instructs the first device to send transmission information of the data channel; the first control information includes at least one field indicating the format of the second control information; the format of the second control information includes at least the first format and the second format , the first format indicates the time-frequency resource of the specified message fed back by the second device, and the second format indicates the redundancy version of the data channel sent by the first device; the second module, the second module is used for: when the second control information is the first In the format, the second device sends a specified message to the first device, instructs the second device to send the control information of the transmission information of the specified message, and instructs the second device to send the control information of the redundant version of the specified message; wherein, the specified message occupies part of the or all of the time-frequency resources.
  • the second device receives the first control information, the second control information and the data channel sent by the first device; the first control information instructs the first device to send transmission information of the data channel; the first control information includes instructions that indicate the second at least one field of the format of the control information; the first format of the second control information is used to instruct the second device to feed back the time-frequency resources of the specified message; when the second control information is in the first format, the second device sends the first format to the second device.
  • the device sends the designated message, the control information instructing the second device to send the transmission information of the designated message, and the control information instructing the second device to send the redundant version of the designated message, and the designated message occupies part or all of the time-frequency resources; , the second device feeds back the specified message on some or all of the reserved time-frequency resources, so as to ensure timely and successful feedback of the specified message and improve system performance; at the same time, when the second device sends the specified message, it does not need to pass the channel Competitive selection of time-frequency resources saves power consumption of the second device.
  • the above-mentioned first format further includes: at least one field indicating the above-mentioned time-frequency resource.
  • the first format includes at least one field indicating the time-frequency resource of the specified message
  • the second device determines the time-frequency resource reserved for the specified message through the field, and feeds back the specified message on the time-frequency resource, thus, it is ensured that the specified message is fed back in time and successfully.
  • the above-mentioned first format further includes: at least one field indicating a designated message, wherein the designated message includes: channel state information, auxiliary resource selection information , at least one item of positioning information, and power control assistance information.
  • the first format includes at least one field indicating a designated message
  • the second device determines the content of the designated message to be fed back through this field, thereby ensuring channel state information, auxiliary resource selection information, positioning information, power control auxiliary information, etc.
  • the specified message can provide effective and timely feedback and improve system performance.
  • the above-mentioned first format further includes: at least one field indicating a period during which the second device feeds back the specified message.
  • the first format includes at least one field indicating the period for the second device to feed back the specified message
  • the second device determines the period for feeding back the specified message through this field, and feeds back the specified message in time according to the period, so that the specified message can be fed back in time.
  • the above-mentioned time-frequency resources satisfy the time processing capability of the second device for the specified message.
  • the reserved time-frequency resources satisfy the time processing capability of the second device for the specified message, thereby ensuring that the second device has time to process the specified message, and The processed designated messages are timely and successfully fed back to ensure the effective operation of the system.
  • an embodiment of the present application provides a communication device, comprising: a processor; a memory for storing instructions executable by the processor; wherein the processor is configured to implement the above-mentioned first when executing the instructions aspect or one or more of the possible implementations of the first aspect, or the second aspect or one or more of the possible implementations of the second aspect. , or to implement the above third aspect or one or more of the possible implementations of the third aspect, or to implement the fourth aspect or one of the various possible implementations of the fourth aspect. or several communication methods.
  • the first device reserves time-frequency resources for the designated message, thereby ensuring that the second device feeds back the designated message in a timely and successful manner, thereby improving system performance.
  • embodiments of the present application provide a non-volatile computer-readable storage medium, on which computer program instructions are stored, and when the computer program instructions are executed by a processor, implement the above-mentioned first aspect or the first aspect one or more of the possible implementations of the second aspect above, or one or more of the multiple possible implementations of the second aspect above, or the above-mentioned second aspect.
  • the first device reserves time-frequency resources for the designated message, thereby ensuring that the second device feeds back the designated message in a timely and successful manner, thereby improving system performance.
  • an embodiment of the present application provides a chip, including a processor, when the processor executes an instruction, the processor executes the first aspect or one of the various possible implementations of the first aspect.
  • One or more communication methods, or implementing one or more of the above-mentioned second aspect or multiple possible implementations of the second aspect, or implementing the above-mentioned third aspect or multiple aspects of the third aspect One or more of the possible implementations of the communication methods, or the implementation of the fourth aspect or one or more of the various possible implementations of the fourth aspect.
  • the first device reserves time-frequency resources for the designated message, thereby ensuring that the second device feeds back the designated message in a timely and successful manner, thereby improving system performance.
  • the embodiments of the present application provide a computer program product containing instructions, which, when run on a computer, cause the computer to execute the first aspect or one of multiple possible implementations of the first aspect.
  • One or more communication methods or performing one or more of the above-mentioned second aspect or multiple possible implementations of the second aspect, or performing the above-mentioned third aspect or a variety of possible implementations of the third aspect
  • the first device reserves time-frequency resources for the designated message, thereby ensuring that the second device feeds back the designated message in a timely and successful manner, thereby improving system performance.
  • FIG. 1 shows a schematic diagram of a full LBT mechanism according to an embodiment of the present application.
  • FIG. 2 shows a schematic diagram of delayed transmission of data caused by channel contention failure according to an embodiment of the present application.
  • FIG. 3 shows a schematic structural diagram of a communication system according to an embodiment of the present application.
  • FIG. 4 shows a schematic structural diagram of another communication system according to an embodiment of the present application.
  • FIG. 5 shows a flowchart of a communication method according to an embodiment of the present application.
  • FIG. 6 shows a flowchart of another communication method according to an embodiment of the present application.
  • FIG. 7 shows a structural diagram of a communication device according to an embodiment of the present application.
  • FIG. 8 shows a schematic structural diagram of a communication device according to an embodiment of the present application.
  • FIG. 9 shows a schematic structural diagram of a chip according to an embodiment of the present application.
  • the channel contention mechanism on the unlicensed spectrum is described below.
  • the terminal When the terminal sends data on the unlicensed spectrum, it needs to compete for the channel before sending the data.
  • the basic process is: the terminal first monitors whether the channel is free before each transmission. If the channel is not free, it will not send data and wait for a while. Try again to send data only when it is guaranteed to be idle, so as to avoid interrupting the ongoing data transmission process of other terminals.
  • LBT Listen Before Talk
  • CSMA Carrier Sensing Multi Access
  • the LBT mechanism can include: full LBT (full LBT), one shot LBT (one shot LBT) and non-LBT (no LBT). Among them, the full LBT process of the terminal is:
  • the terminal initializes the backoff countdown, randomly generates a number N, and satisfies 0 ⁇ N ⁇ backoff time window size (contention window size, CWS), where CWS is the window length constrained according to the business priority.
  • CCA clear channel assessment
  • FIG. 1 shows a schematic diagram of a full LBT mechanism according to an embodiment of the present application.
  • the terminal performs full LBT twice.
  • the terminal needs to perform LBT before occupying the unlicensed spectrum to send data, which may cause the terminal to have no opportunity to send data or the data cannot be sent in time due to the failure of LBT.
  • the Hybrid Automatic Repeat Request (HARQ) feedback message is carried in the sidelink physical feedback channel (Physical Sidelink Feedback Channel, PSFCH), and the SCI is carried in the sidelink physical control
  • PSFCH Physical Sidelink Feedback Channel
  • the transmitted data is carried in the PSSCH; the transmitting terminal (TxUE) sends control information and data to the receiving terminal (RxUE), and the receiving terminal sends HARQ for the received data carried in the PSSCH.
  • the HARQ feedback message is carried in the PSFCH, because the PSFCH and the PSSCH are bound one-to-one, the HARQ feedback message can be directly fed back to the sending terminal without channel competition; but the feedback information such as channel measurement information is carried in the PSSCH , at this time, the receiving terminal needs to pass the channel competition to determine whether it can feed back to the sending terminal.
  • the receiving terminal has many important feedback messages, such as: 3I measurement information, namely channel quality information (Channel Quantity Indicator, CQI), rank information (Rank Indicator, RI), precoding matrix indication information (Precoding Matrix Indicator, PMI); terminal-assisted resource selection information, such as: the information that the group member (Group Member) assists the group header in the resource selection in the group (Group) mechanism, and the resource allocation mode (Mode2b) based on the assistance of the receiver.
  • Receiver auxiliary information; positioning information; power control auxiliary information, etc.; these feedback information is carried in the PSSCH and needs to be fed back to the sending terminal or group header in time to ensure the performance of the communication system and the effective operation of the communication system .
  • FIG. 2 shows a schematic diagram of delayed transmission of data caused by channel competition failure according to an embodiment of the present application.
  • the moment when the sending terminal and the like send relevant indication information such as measurement, auxiliary mechanism, and data transmission to the receiving terminal is the first 1 time unit, and expect to receive the corresponding feedback information from the receiving terminal in the 7th time unit, and because the channel competition of the receiving terminal fails, the actual feedback time is the 15th time unit, that is, the actual feedback time is compared with the expected feedback time. Delayed for a long time, these important messages cannot be fed back in time, which affects the transmission performance of the SL-U communication system and the effective operation of the communication system.
  • the technical solutions provided in the embodiments of the present application can be applied to various communication systems, for example, a new radio (NR) communication system using the fifth generation (5th generation, 5G) communication technology, a future evolution system, or a variety of communication fusions system, etc.
  • the technical solutions provided in this application can be applied to various application scenarios, such as machine to machine (M2M), macro-micro communication, enhanced mobile broadband (eMBB), ultra-reliable and ultra-low latency Communication (ultra-reliable&low latency communication, uRLLC), massive machine type communication (mMTC), device to device communication (D2D) and other scenarios.
  • M2M machine to machine
  • eMBB enhanced mobile broadband
  • uRLLC ultra-reliable and ultra-low latency Communication
  • mMTC massive machine type communication
  • D2D device to device communication
  • These scenarios may include but are not limited to: a communication scenario between terminals, a communication scenario between a network device and a network device, a communication scenario between a network device and a terminal, and the like.
  • a communication scenario between terminals such as D2D
  • D2D communication scenario between terminals
  • the network architecture and service scenarios described in the embodiments of the present application are for the purpose of illustrating the technical solutions of the embodiments of the present application more clearly, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. It can be seen that, with the evolution of the network architecture and the emergence of new service scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.
  • FIG. 4 shows a schematic structural diagram of another communication system according to an embodiment of the present application.
  • the communication system may include one or more sending terminal groups (only one sending terminal group is shown in FIG. 4 ) 401) and one or more receiving terminal groups (receiving terminal group 402 and receiving terminal group 403 are shown in FIG. 4).
  • the sending terminal group 401 may include one or more sending terminals
  • the receiving terminal group 402 may include one or more receiving terminals.
  • At least one terminal in the sending terminal group and at least one terminal in the receiving terminal group have SL-U transmission capability.
  • the terminal involved in the embodiments of the present application may be a device or a component in the device that implements the terminal function.
  • the terminal includes but is not limited to various handheld devices, vehicle-mounted devices, and wearable devices with wireless communication functions.
  • computing device, or other processing device connected to a wireless modem may also include subscriber units, cellular phones, smart phones, wireless data cards, personal digital assistants (PDAs) ), computer, tablet computer, handheld device (handheld), laptop computer (laptop computer), machine type communication (MTC), terminal (terminal), user equipment (UE), mobile terminal, Bracelets, smart watches, sensors, etc.
  • PDAs personal digital assistants
  • MTC machine type communication
  • UE user equipment
  • UE user equipment
  • Bracelets smart watches, sensors, etc.
  • the terminal may be a component in any of the foregoing devices (for example, the terminal may refer to a chip system in any of the foregoing devices).
  • the terminal involved in the embodiments of this application may also be an on-board module, on-board module, on-board component, on-board chip or on-board unit built into the vehicle as one or more components or units, and the vehicle passes through the built-in on-board module.
  • an on-board module, on-board component, on-board chip or on-board unit may implement the method of the present application.
  • Fig. 5 shows a flowchart of a communication method according to an embodiment of the present application.
  • the method can be applied to the communication system in Fig. 3 or Fig. 4, wherein the first device can be the terminal 301 in Fig. 3, and the corresponding
  • the second device may be the terminal 302 in the above-mentioned FIG. 3; the first device may also be the transmitting terminal in the transmitting terminal group 401 in the above-mentioned FIG. 4, and correspondingly, the second device may be the receiving terminal group 402 and /or a receiving terminal in the receiving terminal group 403 .
  • the method may include the following steps:
  • Step 501 The first device sends the first control information and the second control information to the second device.
  • the first device may send the first control information and the second control information in a multicast, unicast or broadcast manner.
  • the first device may send the first control information and the second control information to one second device (unicast scenario), and the first device may also send the first control information and the second control information to multiple second devices (multicast scenario).
  • Two control information the first device may also send the first control information and the second control information to an unlimited number of second devices (broadcast scenarios).
  • the first control information may include at least one of a first field or a second field, at least one of the first field or the second field indicates the format of the first control information, the first field or the second field At least one indicates the format of the second control information.
  • the first control information may include both a first field and a second field, and the format of the first control information and the format of the second control information are jointly indicated by the first field and the second field, for example, indicated by the first field.
  • the format of the first control information the format of the second control information is indicated by the second field; or, the format of the second control information is indicated by the first field, and the format of the first control information is indicated by the second field.
  • the first control information may only include the first field, or the first control information may include only the second field, and the format of the first control information and the second control information may be individually indicated by the first field (or the second field).
  • the format of the information indicates the format of the first control information and the format of the second control information through the first field, or indicates the format of the first control information and the format of the second control information through the second field.
  • the format of the first control information includes at least a first format a and a second format a, wherein the first format a indicates the time-frequency resource of the specified message fed back by the second device, and the second format a indicates the first device to send the data channel transmit information.
  • the first control information may be SCI.
  • the format of SCI includes first-level SCI1 and second-level SCI2, among which, SCI1 includes SCI1-A, SCI2 includes SCI2-A and SCI2-B, and the fields contained in SCI1-A and the definition of each field can be found in Table 1, the fields included in SCI2-A and the definition of each field can be found in Table 2.
  • the second format a can be an existing first-level SCI1, for example, it can be SCI1-A in the above-mentioned standard protocol; the first format a can be a new first-level SCI1, in order to be compatible with SCI1-A in the standard protocol.
  • the new first-level SCI1 is defined as SCI1-B, wherein, SCI1-B can multiplex at least one field in SCI1-A, and the information indicated by each multiplexed field is redefine.
  • the specified message may include: channel state information, auxiliary resource selection information, positioning information, power control auxiliary information, and other information carried in the PSSCH.
  • the channel state information may include: CQI, RI, PMI and other information.
  • the positioning information may be the position of the second device, for example, may be the round trip delay (Round Trip Time, RTT) determined by the second device according to the reference signal sent by the first device, and/or the angle of arrival (Angle of Arrival) , AOA) information.
  • the positioning information may also be the geographic location of the second device, where the geographic location of the second device may refer to location coordinates obtained based on satellites, such as GPS coordinates, or Beidou location coordinates, etc.;
  • the position can also be the position information obtained based on other positioning systems or positioning technologies, such as position information obtained based on inertial navigation, position information obtained based on radar, and position information obtained based on the positioning signal between the first device and the second device. etc., which are not limited in the embodiments of the present application.
  • the auxiliary resource selection information can be the resource information recommended by the group members to the group head under the Group mechanism, and the auxiliary group head can better select the resources used by the group for the group; the auxiliary resource selection information can also be the auxiliary resource selection information in the Sidelink Mode2b resource selection mode. Resource information, for better communication, the receiving terminal recommends resource information to the sending terminal.
  • the power control assistance information may be related information measured and fed back by a terminal in a distributed network according to a power control criterion, including channel information, interference information, and the like.
  • the time-frequency resources may include time-domain resources and frequency-domain resources, for example, the frequency-domain resources may be one or more resource blocks (resource blocks, RBs), or one or more resource elements (resource elements, RE), may also be one or more carriers (carrier), may also be one or more bandwidth parts (bandwidth part, BWP) and so on.
  • the time domain resource may be one or more subframes, may be one or more time slots, or may be one or more symbols on one or more time slots, or the like.
  • the data channel may be PSSCH; the transmission information may include information related to the transmission of the data channel, such as: demodulation reference signal (Demodulation Reference Signal, DMRS), modulation and coding scheme (Modulation Coding Scheme, MCS), antenna port information, time-frequency resources, frequency domain resources and other information.
  • demodulation reference signal Demodulation Reference Signal
  • MCS Modulation Coding Scheme
  • the format of the second control information includes at least a third format and a fourth format, wherein the third format indicates the redundancy version (Redundancy Version, RV) of the specified message fed back by the second device; the fourth format indicates that the first device sends data A redundant version of a channel (also called data message).
  • the second control information may be SCI; exemplarily, the fourth format may be the existing second-level SCI2, for example, may be SCI2-A or SCI2-B in the standard protocol second-level SCI2.
  • the fourth format is exemplified as SCI2-A in the standard protocol in the embodiments of this application;
  • the third format may be a new second-level SCI2, in order to be compatible with SCI2-A and SCI2-B in the standard protocol difference, in this embodiment of the present application, the new secondary SCI2 is defined as SCI2-C; wherein, SCI2-C can multiplex at least one field in SCI2-A, and perform information on the information indicated by each multiplexed field. redefine.
  • SCI2-C multiplexes the Redundancy version field in SCI2-A, and the Redundancy version field in SCI2-C indicates that the second device feeds back the redundancy version of the specified message; in this way, SCI2-C multiplexes SCI2-A Redundancy version field in ; no additional PSCCH signaling overhead will be added to ensure system transmission performance.
  • the format of the first control information can be indicated by different values of the first field
  • the second control information can be indicated by different values of the second field Format
  • the format of the first control information can be represented by 1 bit or 2 bits in the first field, for example, when the value of this 1 bit is 0, it indicates that the format of the first control information is the first format a, when the 1-bit value is 1, it indicates that the format of the first control information is the second format a; or, when the 1-bit value is 1, it indicates that the format of the first control information is the first format a, and the 1-bit value is 0
  • the 2-bit value is 00
  • it indicates that the format of the first control information is the second format a
  • the 2-bit value is 11 (or 10 or 01)
  • it indicates the first The control information is in the first format a.
  • the format of the second control information can be represented by 1 bit or 2 bits in the second field.
  • the value of the 1 bit is 0, it indicates that the format of the second control information is the third format, and the value of the 1 bit is 1.
  • the 1-bit value is 1, it indicates that the format of the second control information is the fourth format; or, when the 1-bit value is 1, it indicates that the format of the second control information is the third format, and when the 1-bit value is 0, it indicates that the format of the second control information is the third format.
  • the first field may be the field Reserved (reserved bits) in SCI1-A and SCI1-B, and 1 bit or 2 bits in the field Reserved are used to indicate the format of the first control information, for example, the 2 bits
  • the value is 00
  • it indicates that the first control information is SCI1-A
  • the 2-bit value indicates that the first control information is SCI1-B
  • the 1-bit value indicates that the first control information is SCI1-A
  • the 1-bit value is 1 indicates that the first control information is SCI1-B
  • the 1-bit value is 1 indicates that the first control information is SCI1-A
  • the 1-bit value is 0, it indicates that the first control information is SCI1 -B.
  • the second field can be the field 2nd-stage SCI format (secondary SCI format) in SCI1-A and SCI1-B, using 1 bit or 2 bits in the field 2nd-stage SCI format to indicate the format of the second control information, For example, when the 2-bit value is 00, it indicates that the second control information is SCI2-A, and when the 2-bit value is 11, it indicates that the second control information is SCI2-C; or, when the 1-bit value is 0, it indicates the second control information is SCI2-A, and when the 1-bit value is 1, it indicates that the second control information is SCI2-C.
  • 1 bit or 2 bits in Reserved indicate the format of the first control information
  • 1 in the 2nd-stage SCI format The bit or 2 bits indicate the format of the second control information.
  • the format and format of the first control information may be indicated by different values of the first field (or the second field).
  • the format of the second control information for example, 2 bits in the first field (or the second field) represent the format of the first control information and the format of the second control information, and when the 2-bit value is 00, it indicates the format of the first control information.
  • the format is the first format a, and the format of the second control information is the third format; when the 2-bit value is 01, it indicates that the format of the first control information is the first format a, and the format of the second control information is the fourth format; the When the 2-bit value is 10, it indicates that the format of the first control information is the second format a, and the format of the second control information is the third format; when the 2-bit value is 11, it indicates that the format of the first control information is the second format a, The format of the second control information is the fourth format.
  • 1 bit in the first field indicates the format of the first control information and the format of the second control information
  • the value of the 1 bit indicates that the format of the first control information is the first format a.
  • the format of the second control information is the third format
  • the 1-bit value of 1 indicates that the format of the first control information is the second format a
  • the format of the second control information is the fourth format
  • the 1-bit The value of 1 indicates that the format of the first control information is the first format a, and the format of the second control information is the third format
  • the value of the 1 bit indicates that the format of the first control information is the second format a
  • the format of the second control information is the fourth format.
  • the first field may be the field Reserved (or 2nd-stage SCI format field) in SCI1-A and SCI1-B, and 2 bits in the field Reserved (or 2nd-stage SCI format) are used to indicate the first control The format of the information and the format of the second control information. For example, when the 2-bit value is 11, it indicates that the first control information is SCI1-B and the second control information is SCI2-C; when the 2-bit value is 01, it indicates that the first control information is SCI1-B.
  • the format of the information is SCI1-B, and the format of the second control information is SCI2-A; when the 2-bit value is 10, it indicates that the format of the first control information is SCI1-A, and the format of the second control information is SCI2-C; When the 2-bit value is 00, it indicates that the format of the first control information is SCI1-A, and the format of the second control information is SCI2-A.
  • the first field may be the field Reserved (or 2nd-stage SCI format field) in SCI1-A and SCI1-B, and use 1 bit in the field Reserved (or 2nd-stage SCI format) to indicate the first control
  • the format of the information and the format of the second control information For example, when the 1-bit value is 0, it indicates that the first control information is SCI1-B, and the second control information is SCI2-C. When the 1-bit value is 1, it indicates that the first control information is SCI1-B.
  • the format of the information is SCI1-A, and the format of the second control information is SCI2-A; or, when the 1-bit value is 1, it indicates that the first control information is SCI1-B, the second control information is SCI2-C, and the 1-bit value is SCI1-B. When the value is 0, it indicates that the format of the first control information is SCI1-A, and the format of the second control information is SCI2-A.
  • the Reserved field (or 2nd-stage SCI format field) in the SCI format in the standard protocol is modified, so that 2 bits or 1 bit in Reserved (or 2nd-stage SCI format) indicates the format of the first control information and the format of the second control information, in this way, only one field of the SCI format in the standard protocol is multiplexed, and the PSCCH signaling overhead will not be additionally increased, thereby ensuring the system transmission performance.
  • the first format a may further include: at least one field indicating the time-frequency resource.
  • the first device reserves time-frequency resources for the second device to feed back the specified message through the at least one field, so as to ensure that the specified message can be fed back in time and successfully on the time-frequency resource.
  • the reserved time domain resources do not need to be occupied for a long time for a long time, but only a small part of the time-frequency pattern is reserved to satisfy the feedback specified message, so as to achieve optimal performance with as little overhead as possible.
  • two fields in the first format a indicate the time-frequency resources reserved for the specified message
  • one of the two fields may indicate the time-domain resources reserved for the specified message
  • the other field may indicate the reserved frequency resources. domain resources; or, a field in the first format a is used to indicate the time-frequency resources reserved for the specified message, and this field may simultaneously indicate the reserved time-domain resources and the reserved frequency-domain resources for the specified message. It can be understood that three or more fields in the first format a may indicate time-frequency resources, and the embodiment of the present application does not limit the number of fields indicating time-frequency resources.
  • SCI1-B multiplexes the Frequency resource assignment and Time resource assignment fields in SCI1-A, and the Frequency resource assignment and Time resource assignment fields in SCI1-B. Used to indicate the time-frequency resources reserved for the specified message, wherein the Frequency resource assignment field is used to indicate the reserved frequency domain resources, and the Time resource assignment field is used to indicate the reserved time domain resources. In this way, by multiplexing the Frequency resource assignment field and the Time resource assignment field in SCI1-A, the PSCCH signaling overhead will not be increased, and the system transmission performance is guaranteed.
  • the time-frequency resources reserved by the first device for the second device satisfy the processing time capability of the second device for the specified message. ), so as to ensure that the second device has time to process the designated message, and feed back the processed designated message in a timely and successful manner to ensure the effective operation of the system.
  • the second device needs to take a certain time to measure the channel state, so as to generate channel state information, set the reserved time-frequency resource location after the second device completes the channel state measurement, and reserve The time-domain resource position of the second device can satisfy the CSI processing time capability (time processing capability of channel state information) of the second device; for another example, if the specified message is power control auxiliary information, the second device needs to take a certain time to measure the power, etc., Thereby generating rate control auxiliary information, setting the reserved time-frequency resource position after the second device completes the measurement of power, etc., the reserved time domain resource position can satisfy the processing time capability of the second device for the corresponding auxiliary information (the size of the auxiliary information). time processing capability).
  • the third format further includes: at least one field indicating a specified message.
  • the first device indicates the specified message type that the second device needs to feed back through the at least one field, thereby ensuring that specified messages such as channel state information, auxiliary resource selection information, positioning information, and power control auxiliary information can be fed back effectively and in a timely manner, improving the system. performance.
  • a field in the third format indicates a specified message
  • the field may include 2 bits, and different values of the field indicate different types of the specified message. For example, when the 2-bit value is 00, it indicates the type of the specified message. is channel state information; when the 2-bit value is 01, it indicates that the type of the specified message is auxiliary resource selection information; when the 2-bit value is 10, it indicates that the type of the specified message is positioning information; when the 2-bit value is 11, it indicates that the specified message is Type is Power Control Assistance Information.
  • the number of fields used to indicate the specified message in the first format a and the number of bits contained in each field can be determined according to the type of the specified message; for example, if the specified message contains four types, the first format a can be The specified message is indicated by a field containing 2 bits or more bits; the first format a may also indicate the specified message by two fields containing a total of 2 bits or a total of more bits. Not limited.
  • SCI2-C multiplexes the CSI request (channel state information request) field in SCI2-A, the CSI request field in SCI2-A occupies 1 bit, and the CSI request field in SCI2-C is extended from the original 1 bit.
  • X bits where X is a positive integer; different values of the X bits are used to indicate different types of the specified message; optionally, if the specified message contains four types, X can be 2. In this way, by multiplexing the CSI request field in SCI2-A, the system transmission performance is guaranteed.
  • the first format a further includes: at least one field indicating the modulation, coding and demodulation pilot information used when the second device feeds back the specified message.
  • the first device instructs the second device to use the modulation, coding and demodulation pilot information to feed back the specified message through the at least one field, thereby ensuring timely and successful feedback of the specified message.
  • the modulation, coding and demodulation pilot information may include: modulation and coding scheme, pilot pattern, number of pilot ports, modulation and coding scheme table indication, and the like.
  • the multiple fields in the first format a indicate the modulation coding and demodulation pilot information used when the second device feeds back the above-mentioned specified message.
  • four fields may be used to indicate the modulation and coding and demodulation pilot information used when the second device feeds back the specified message; wherein one field indicates the modulation and coding scheme used when the second device feeds back the specified message, and one field indicates the modulation and coding scheme used when the second device feeds back the specified message.
  • the pilot pattern used when the second device feeds back the specified message one field indicates the modulation and coding scheme table used when the second device feeds back the specified message, and one field indicates the number of pilot ports used when the second device feeds back the specified message .
  • SCI1-B multiplexes the Modulation and coding scheme (modulation and coding scheme) field, Additional MCS table indicator (additional modulation and coding scheme table) field, DMRS pattern (demodulation reference signal pattern) field in SCI1-A , Number of DMRS port (demodulation reference signal port number) field, among these four fields in SCI1-B, the Modulation and coding scheme field indicates the modulation and coding scheme used when the second device feeds back the above specified message; Additional MCS table The indicator field indicates the modulation and coding scheme table used when the second device feeds back the specified message; the DMRS pattern field indicates the pilot pattern used when the second device feeds back the specified message; the Number of DMRS port field indicates that the second device feeds back the specified message port information.
  • SCI1-B will not increase PSCCH signaling overhead and ensure system transmission performance.
  • the first format a further includes: at least one field indicating a period during which the second device feeds back the specified message. In this way, when the first device expects the second device to periodically feed back the specified message, the first device can instruct the second device to feed back the specified message according to the period through the at least one field, thereby ensuring the effective operation of the system.
  • a field in the first format a may indicate the period at which the second device feeds back the specified message. For example, if the specified message is channel state information, the first device expects the second device to feed back the channel state information every 5ms. ; This field in the first format a may indicate that the cycle of feeding back the channel state information by the second device is 5ms. It can be understood that more fields in the first format a may indicate the period for the second device to feed back the specified message, and the embodiment of the present application does not limit the number of fields of the period for the second device to feed back the specified message.
  • SCI1-B multiplexes the Resource reservation period (period of reserved resources) field in SCI1-A, and the Resource reservation period field in SCI1-B indicates the period during which the second device feeds back the specified message.
  • the PSCCH signaling overhead will not be increased, and the system transmission performance is guaranteed.
  • the third format further includes: all bits of the source identifiers of the first control information and the second control information, and all bits of the destination identifiers of the first control information and the second control information.
  • the first device can clearly indicate the source identification and destination identification of the first control information and the second control information through all bits of the source identification and all bits of the destination identification in the third format , so as to ensure that the object expected by the first device feeds back the specified message in a timely and successful manner.
  • two fields in the third format include all bits of the source identification of the first control information and the second control information, and all bits of the destination identification of the first control information and the second control information; wherein , one field contains all bits of the source identifiers of the first control information and the second control information, and the other field contains all the bits of the destination identifiers of the first control information and the second control information.
  • one field or more fields may contain all bits of the source identifiers of the first control information and the second control information, and all bits of the destination identifiers of the first control information and the second control information. , which is not limited in the embodiments of the present application.
  • SCI2-C multiplexes the Source ID (source identification) field and the Destination ID (destination identification) field in SCI2-A, and the Source ID field in SCI2-A only contains the source identification of the physical layer L1 , in the Source ID field in SCI2-C, fill in the source identification of physical layer L1 and data link layer L2; the Destination ID field in SCI2-A only contains the destination identification of physical layer L1, in SCI2-C Destination ID The ID field is filled with the destination identifiers of the physical layer L1 and the data link layer L2. In this way, the Source ID field and Destination ID field in SCI2-A are multiplexed as much as possible to ensure the system transmission performance.
  • SCI2-C multiplexes the New data indicator (new data indication, NDI) field, Redundancy version (redundancy version) field, HARQ feedback enabled/disabled indicator (Hybrid Automatic Repeat Request Processing Feedback) in SCI2-A enable/disable indication) field, Source ID field and Destination ID field.
  • the first device and the second device pre-agreed that when the second control information is SCI2-C, the corresponding NDI, redundancy version, and HARQ feedback enable/disable instructions are processed according to the pre-agreed process, so that the NDI, redundancy version and HARQ feedback enable/disable indicates the presence of idle bits.
  • the Source ID field indicates the source identification of the physical layer L1
  • the Destination ID field indicates the destination identification of the physical layer L1
  • the NDI, redundancy version and HARQ feedback enable/disable bits indicate that the field is free It can be used to indicate the source identifier of the data link layer L2 of SCI1-B and SCI2-C, and the destination identifier of the data link layer L2 of SCI1-B and SCI2-C. If the above idle bits are insufficient, it can be used. Further complement by adding bits.
  • the idle bits in the New data indicator and HARQ feedback enabled/disabled indicator fields in SCI2-C can be filled with all bits of the source identification of the data link layer L2 of SCI1-B and SCI2-C, and in the Redundancy version field The idle bits of the data link layer L2 of SCI1-B and SCI2-C are filled with all bits of the destination identification.
  • the idle bits in the New data indicator and HARQ feedback enabled/disabled indicator fields in SCI2-C can be Complete all bits of the destination of the data link layer L2 of SCI1-B and SCI2-C, and the idle bits in the Redundancy version field are filled with all bits of the source identification of the data link layer L2 of SCI1-B and SCI2-C ; If the above idle bits are insufficient, it can be further filled by adding bits. In this way, the system transmission performance is guaranteed by multiplexing the New data indicator field, HARQ feedback enabled/disabled indicator field, Redundancy version field, Source ID field and Destination ID field in SCI2-A.
  • first control information and the second control information may further include other fields, which are not limited in this embodiment of the present application.
  • SCI1-B multiplexes the fields in SCI1-A
  • Table 1 shows the same fields in SCI1-B and SCI1-A.
  • SCI1-A is an existing standard protocol SCI format, in which the reserved 2-bit value in the Reserved field is 00 by default, indicating that the SCI1 is SCI1-A; the fields in SCI1-A and the corresponding interpretations of each field It is the same as the field in SCI1-A and the corresponding interpretation of each field in the standard protocol.
  • SCI1-B contains the same fields as SCI1-A, but there are differences in the interpretation of the same fields.
  • Table 1 SCI1-A and SCI1-B field interpretation comparison table
  • the Priority field indicates the priority of the time-frequency resource occupied by the first device for the current transmission and the priority of the time-frequency resource reserved in the future
  • in SCI1-B indicates the priority of the time-frequency resources reserved by the first device for the second device.
  • the Frequency resource assignment field indicates the time-frequency resources occupied by the first device for the current transmission and the frequency domain resources reserved in the future
  • in SCI1-B indicates that the first device is reserved for the second device to feed back the specified message frequency domain resources.
  • the Time resource assignment field indicates in SCI1-A the time-frequency resources occupied by the first device for the current transmission and the time domain resources reserved in the future, and in SCI1-B instructs the first device to reserve the feedback designation message for the second device time domain resources.
  • the Resource reservation period field indicates in SCI1-A the period of time domain resources reserved by the first device for the future, and in SCI1-B indicates the period in which the first device instructs the second device to feed back the specified message.
  • the DMRS pattern field indicates the pilot pattern transmitted by the first device in SCI1-A, and indicates the pilot pattern used when the first device instructs the second device to feed back the above-mentioned specified message in SCI1-B.
  • the 2nd-stage SCI format field indicates the format of the corresponding SCI2 indicated by SCI1-A in SCI1-A, and the SCI2 format corresponding to SCI1-B in SCI1-B is SCI2-C.
  • the Beta_offset indicator (beta offset indication) field indicates the relevant parameters of SCI2 in SCI1-A and the relevant parameters of SCI2-C in SCI1-B.
  • the Number of DMRS port field indicates the port information transmitted by the first device in SCI1-A, and in SCI1-B, indicates that the first device instructs the second device to feed back the port information of the specified message.
  • the Modulation and coding scheme field indicates the MCS transmitted by the first device in SCI1-A, and the MCS used when the first device instructs the second device to feed back the specified message in SCI1-B.
  • the Additional MCS table indicator field indicates the MCS Table transmitted by the first device in SCI1-A, and in SCI1-B, indicates that the first device indicates the MCS Table of the second device feedback specified message.
  • PSFCH overhead indication (PSFCH overhead indication) field in SCI1-A instructs the first device to transmit the corresponding PSFCH overhead information
  • in SCI1-B instructs the first device to instruct the second device to feed back the PSFCH overhead information of the indication message.
  • the Reserved field is reserved bits in SCI1-A and has no additional indication information. In SCI1-B, the indicated format is SCI1-B.
  • SCI2-C multiplexes fields in SCI2-A
  • Table 2 is a comparison table of interpretations of the same fields in SCI2-C and SCI2-A.
  • SCI2-A is an existing standard protocol SCI format, and the corresponding definitions of fields and fields in SCI2-A are the same as those of fields and fields in SCI2-A of the standard protocol.
  • SCI2-C contains the same fields as SCI2-A, but there are differences in the interpretation of the same fields.
  • Table 2 SCI2-A and SCI2-C field interpretation comparison table
  • the HARQ process number (Hybrid Automatic Repeat Request Processing Process Number) field indicates the HARQ processing process number transmitted by the first device in SCI2-A, and indicates the first device in SCI2-C to indicate the second device. Feedback the HARQ process ID of the specified message.
  • the Newdata indicator field indicates the NDI information transmitted by the first device in SCI2-A, and in SCI2-C, indicates that the first device instructs the second device to feed back the NDI information of the specified message.
  • the Redundancy version field indicates the redundancy version number transmitted by the first device in SCI2-A, and in SCI2-C, indicates that the first device indicates the redundancy version number of the specified message fed back by the second device.
  • the Source ID field instructs the first device to transmit the corresponding source ID
  • SCI2-C instructs the first device to transmit the corresponding source ID of the physical layer L1 and source ID information of the data link layer L2.
  • the Destination ID field instructs the first device to transmit the corresponding destination ID
  • SCI2-C instructs the first device to transmit the corresponding destination ID of the physical layer L1 and destination ID information of the data link layer L2.
  • the HARQ feedback enabled/disabled indicator field indicates whether the first device transmits the associated HARQ feedback in SCI2-A, and the first device in SCI2-C indicates whether the second device feedback specified message has HARQ feedback.
  • the Cast type indicator (type conversion indication) field indicates the Cast type transmitted by the first device in SCI2-A, and the Cast type transmitted by the first device in SCI2-C.
  • the CSI request field in SCI2-A, instructs the first device to trigger the second device to feed back CSI, and in SCI2-C instructs the first device to instruct the second device to feed back the type of the specified message.
  • Tables 1 and 2 are exemplary descriptions of the fields in SCI1-B, SCI1-A, SCI2-C, and SCI2-A.
  • SCI1-B For the definition of each field, please refer to the above-mentioned related introduction, which will not be repeated here. .
  • the SCI in the sidelink includes indication information such as time-frequency resources transmitted by the TxUE, and is not related to the time-frequency resources and other information fed back by the RxUE.
  • indication information such as time-frequency resources transmitted by the TxUE, and is not related to the time-frequency resources and other information fed back by the RxUE.
  • SCI1-B and SCI2-C instruct the RxUE to feed back information such as reserved time-frequency resources for the specified message, so as to ensure timely and successful feedback of important messages and improve system performance.
  • SCI1-B and SCI2-C have no new fields to ensure system transmission performance.
  • the first device when the first device sends a message to the second device, if the second device needs to feed back the specified message in a timely and guaranteed manner, it can reserve time-frequency resources for the specified message.
  • the device can send SCI1-B and SCI2-C to the second device, thereby indicating the time-frequency resources reserved for the second device to feed back the specified message, the type of the specified message, and the modulation and coding of the specified message.
  • the first device reserves time-frequency resources for the designated message by sending the sidelink control information SCI1-B and SCI2-C, thereby ensuring timely and successful feedback of the designated message and improving the performance of the SL-U communication system.
  • Step 502 the second device receives the first control information and the second control information sent by the first device;
  • the first control information may include at least one of a first field or a second field, at least one of the first field or the second field indicates the format of the first control information, the first field or the second field At least one indicates the format of the second control information.
  • the format of the first control information includes at least a first format a and a second format a, wherein the first format a indicates the time-frequency resource of the specified message fed back by the second device, and the second format a indicates that the first device sends the transmission information of the data channel .
  • the format of the second control information includes at least a third format and a fourth format, wherein the third format indicates the redundant version of the specified message fed back by the second device, and the fourth format indicates the redundant version of the data channel sent by the first device.
  • the related expressions such as the first field, the second field, the first format a, the second format a, the third format, and the fourth format can refer to the foregoing step 501, which will not be repeated here.
  • the second device determines the format of the first control information and the format of the second control information according to the first field and/or the second field. If it is determined that the format of the received first control information is the first format a and the format of the second control information is the third format, for example, the second device receives SCI1-B and SCI2-C sent by the first device, Then the second device determines the preview time-frequency resources, modulation coding and other information indicated by the fields in the first format a and the second format a, and prepares to feed back the specified message expected by the first device on the reserved time-frequency resources.
  • the second device determines the time-frequency resource for feeding back the specified message according to at least one field included in the first format a that indicates the time-frequency resource.
  • the time-frequency resource meets the requirements of the second device.
  • Time processing capability for the specified message For example, the second device may determine the frequency domain resource for feeding back the specified message through the Frequency resource assignment field in SCI1-B, and determine the time domain resource for feeding back the specified message through the Time resource assignment field in SCI1-B.
  • the second device determines the type of the specified message according to at least one field included in the third format that indicates the specified message. For example, the second device may determine the type of the specified message through the CSI request in SCI2-C.
  • the second device determines, according to at least one field in the first format a that indicates the modulation and coding and demodulation pilot information that the second device uses when feeding back the specified message, to determine to use when feeding back the specified message.
  • modulation coding and demodulation pilot information is included in the first format a.
  • the second device can use the Modulation and coding scheme field in SCI1-B to determine the modulation and coding scheme used when feeding back the above specified message; or, use the Additional MCS table indicator field in SCI1-B to determine when feeding back the above specified message Modulation and coding scheme table used; or, through the DMRS pattern field in SCI1-B to determine the pilot pattern used when feeding back the above-mentioned specified message; or, through the Number of DMRS port field in SCI1-B to determine when the above-mentioned specified message is fed back port information.
  • the second device determines the period for feeding back the specified message according to at least one field included in the first format a that indicates the period for the second device to feed back the specified message. For example, the second device may determine the period for feeding back the specified message through the Resource reservation period field in SCI1-B.
  • the second device uses all bits of the source identifiers of the first control information and the second control information included in the third format, and the destination identifiers of the first control information and the second control information. All bits of the first control information and the source identification and the destination identification of the second control information are determined. For example, the second device may determine the source identifiers of the SCI2-C through the source identifiers of the physical layer L1 and the data link layer L2 in the Source ID field in the SCI2-C, and determine the source identifiers of the SCI2-C through the physical layer L1 and the data link layer in the Destination ID field in the SCI2-C. The destination identity of road layer L2 determines the destination identity of SCI2-C.
  • the second device determines the attribution of the message transmitted this time by using the first control information and the source identifier and destination identifier of the second control information.
  • the second device does not use the above-mentioned time-frequency resources, so that it can avoid the reserved time-frequency resources and ensure that the designated message is timely and successfully fed back on the time-frequency resources.
  • the second device may determine whether to perform avoidance on the reserved time-frequency resources according to the priority of the time-frequency resources, so as to ensure successful transmission of data with a higher priority and improve system performance.
  • the sending terminal in the sending terminal group 401 sends SCI1-B and SCI2-C to the receiving terminal group 402 and the receiving terminal group 403, if a certain receiving terminal in the receiving terminal group 402
  • the destination identifier determined according to the fields in SCI1-B and SCI2-C is the same as its own identifier, then prepare to feed back the designated message on the reserved time-frequency resources.
  • the receiving terminal receives SCI1-B and SCI2-C, and the destination identification determined according to the fields in SCI1-B and SCI2-C is different from its own identification, and avoids on the reserved time-frequency resources.
  • Step 503 When the first control information is in the first format a and the second control information is in the third format, the second device feeds back a specified message to the first device on the above-mentioned time-frequency resource.
  • the second device may directly feed back to the first device on the reserved time-frequency resources determined in the above step 502
  • the designated message ensures the timely and successful feedback of the designated message, which improves the system performance; at the same time, the second device does not need to select time-frequency resources through channel competition, nor does it need to send control information, which saves the power consumption of the second device.
  • the second device may, on the above-determined time-frequency resources, feed back the content of the specified message that needs to be fed back according to the determined modulation and coding and demodulation pilot information used when sending the specified message, thereby ensuring the channel Specified messages such as status information, auxiliary resource selection information, positioning information, and power control auxiliary information can be fed back effectively and in a timely manner to improve system performance. Further, the second device can also feed back the specified message in time according to the determined period of feeding back the specified message, so as to ensure the effective operation of the system.
  • the second device when the second device receives the SCI1-B and SCI2-C, the second device can use the Frequency resource assignment, Time resource assignment, CSI request, Modulation and coding scheme, Number of DMRS port, The information determined by fields such as Resource reservation period is fed back to the specified message.
  • the second device may feed back HARQ for the first control information and the second control information, Or the HARQ for the first control information and the second control information is not fed back.
  • the manner of feeding back the above-mentioned HARQ information includes: sending an acknowledgement message (Acknowledgement, ACK) or sending a negative acknowledgement (Negative Acknowledgement, NACK).
  • the second device may not feed back the HARQ for SCI1-B and SCI2-C, and may also feed back the HARQ for SCI1-B and SCI2-C.
  • the second device feeds back HARQ for SCI1-B and SCI2-C if the reception fails, the HARQ-NACK information is transmitted on the PSFCH, and in other cases, no information is transmitted on the PSFCH; or, if the reception is successful, the PSFCH is transmitted.
  • the HARQ-ACK information is transmitted, and if it fails, the HARQ-NACK information is transmitted.
  • Step 504 When the first control information is in the first format a and the second control information is in the third format, the first device receives the specified message fed back by the second device on the above-mentioned time-frequency resource.
  • the first device when the first control information is in the first format a and the second control information is in the third format, the first device can directly receive the specified message fed back by the second device on the time-frequency resource without blind detection
  • the time-frequency resource where the specified message is located also does not need to detect the control information, which saves the power consumption of the first device.
  • the first device may receive the specified message fed back by the second device on the time domain resources specified by the Frequency resource assignment field and the Time resource assignment field in SCI1-B.
  • the first device may detect HARQ for the first control information and the second control information, It is also possible not to detect HARQ for the first control information and the second control information.
  • the first device can receive the HARQ, thereby improving the reliability of communication between the first device and the second device.
  • the first device may not detect HARQ for SCI1-B and SCI2-C; it may also detect HARQ for SCI1-B and SCI2-C.
  • the second device may feed the HARQ for SCI1-B and SCI2-C, the first device may receive the HARQ.
  • the first control information includes at least one of the first field or the second field, and at least one of the first field or the second field indicates the format of the first control information, and the first field or the second field indicates the format of the first control information.
  • At least one of the two fields indicates the format of the second control information; the first format a of the first control information indicates the time-frequency resource of the second device feedback designation message, and the third format of the second control information indicates the second device feedback designation
  • the redundant version of the message thus, by reserving time-frequency resources for the specified message, to ensure the timely and successful feedback of the specified message, and improve the system performance.
  • Fig. 6 shows a flowchart of another communication method according to an embodiment of the present application.
  • the method can be applied to the communication system in Fig. 3 or Fig. 4, wherein the first device can be the terminal 301 in Fig. 3, Correspondingly, the second device may be the above-mentioned terminal 302 in FIG. 3 ; the first device may also be the transmitting terminal in the above-mentioned transmitting terminal group 401 in FIG. 4 , and correspondingly, the second device may be the above-mentioned receiving terminal group 402 in FIG. 4 . and/or receiving terminals in the receiving terminal group 403 . As shown in Figure 6, the method may include the following steps:
  • Step 601 the first device sends the first control information, the second control information and the data channel to the second device;
  • the first device may send the first control information, the second control information and the data channel in a multicast, unicast or broadcast manner.
  • the first device can send the first control information, the second control information and the data channel to one second device (unicast scenario), and the first device can also send the first control information to multiple second devices (multicast scenario) information, the second control information and the data channel, the first device can also send the first control information, the second control information and the data channel to an unlimited number of second devices (broadcast scenarios).
  • the first control information instructs the first device to send transmission information of the data channel; wherein, the content of the transmission information may refer to the above-mentioned relevant description, which is not repeated here.
  • the first control information and the second control information are SCI
  • the data channel is PSSCH.
  • the first control information may be an existing first-level SCI1, for example, may be SCI1-A in a standard protocol; see Table 1 above for the fields included in SCI1-A and the definitions of each field.
  • the first control information may include at least one field indicating the format of the second control information; the format of the second control information includes at least a first format b and a second format b, and the first format b indicates that the second device feeds back the specified message Time-frequency resource; the second format b indicates the redundant version of the data channel sent by the first device; wherein, the content of the specified message, time-frequency resource, etc. can refer to the above-mentioned relevant descriptions, which will not be repeated here.
  • the second format b may be the existing secondary SCI2, for example, may be SCI2-A or SCI2-B in the standard protocol.
  • SCI2-A is exemplified, and the fields contained in SCI2-A and the definition of each field can be found in Table 2; the first format b can be a new second-level SCI2, in order to be compatible with SCI2-A and SCI2-A in the standard protocol.
  • the new secondary SCI2 is defined as SCI2-D; wherein, SCI2-D includes at least one field in SCI2-A, and on this basis, the newly added field carries the reserved time frequency resources and other information.
  • the first control information may indicate the format of the second control information through a field
  • different values of the field may indicate the format of the second control information, for example, 1 bit (bit) or 2 in the field may be used.
  • the bit indicates the format of the second control information. For example, when the 2-bit value is 11 (or 10), it indicates that the format of the second control information is the first format b, and when the 2-bit value is 00 (or 01), it indicates the second control information.
  • the format of the information is the second format b.
  • the field may be the field Reserved of SCI1-A, and the format of the second control information is indicated by 2 bits in the field Reserved. For example, when the value of the 2 bits is 00, it indicates that the second control information is SCI2-A, When the 2-bit value is 11, it indicates that the second control information is SCI2-D; or, the field can be the field 2nd-stage SCI format in SCI1-A, and the 2 bits in the field 2nd-stage SCI format are used to indicate the second The format of the control information, for example, when the 2-bit value is 00, it indicates that the second control information is SCI2-A, and when the 2-bit value is 10, it indicates that the second control information is SCI2-D.
  • the Reserved field or 2nd-stage SCI format field in the SCI format SCI1-A in the standard protocol is modified, and the 2 bits in the Reserved field in SCI1-A are used to indicate the format of the second control information, or the 2nd-stage SCI format is used.
  • the 2 bits in the stage SCI format indicate the format of the second control information.
  • the above-mentioned first format b may include: at least one field indicating the above-mentioned time-frequency resource.
  • the first device reserves time-frequency resources for the second device to feed back a specified message through the at least one field, to ensure that the specified message can be fed back in time and successfully on part or all of the time-frequency resources.
  • the specific content of the time-frequency resources reserved for the specified message indicated by the different numbers of fields in the first format b can be referred to the relevant expressions in the first format a above, which will not be repeated here.
  • the difference between the multiplexed fields in the first format a is that the fields in the first format b are newly added fields.
  • the Frequency resource assignment field and the Time resource assignment field are newly added in SCI2-D.
  • These two fields in SCI2-D-Frequency resource assignment field and Time resource assignment field are used to indicate Specifies the time-frequency resources reserved by the message, where the Frequency resource assignment field is used to indicate the reserved frequency domain resources, and the Time resource assignment field is used to indicate the reserved time domain resources.
  • the time-frequency resources reserved by the first device for the second device satisfy the time processing capability of the second device for the specified message, thereby ensuring that The second device has time to process the designated message, and feeds back the processed designated message in a timely and successful manner to ensure the effective operation of the system.
  • the above-mentioned first format b may further include: at least one field indicating a specified message, so that the first device indicates the specified message type that the second device needs to feed back through the at least one field, thereby ensuring the channel Specified messages such as status information, auxiliary resource selection information, positioning information, and power control auxiliary information can be fed back effectively and in a timely manner to improve system performance.
  • SCI2-D multiplexes the CSI request (channel state information request) field in SCI2-A, the CSI request field in SCI2-A occupies 1 bit, and the CSI request field in SCI2-D is extended from the original 1 bit.
  • X bits where X is a positive integer; different values of the X bits are used to indicate different types of the specified message; optionally, if the specified message contains four types, X can be 2. In this way, by multiplexing the CSI request field in SCI2-A, the system transmission performance is guaranteed.
  • the above-mentioned first format b may further include: at least one field indicating a period during which the second device feeds back the specified message. In this way, when the first device expects the second device to periodically feed back the specified message, the first device can instruct the second device to feed back the specified message according to the period through the at least one field, thereby ensuring the effective operation of the system.
  • the specific content of the cycle of the feedback designation message indicated in the first format b can refer to the relevant description in the first format a above, which will not be repeated here. It should be noted that it is different from the multiplexing field of the first format a. The thing is, the fields in the first format b are newly added fields.
  • SCI2-D adds a Resource reservation period field on the basis of SCI2-A, and the Resource reservation period field in SCI2-D indicates the period during which the second device feeds back the specified message.
  • first control information and the second control information may further include other fields, which are not limited in this embodiment of the present application.
  • the definitions of the fields in SCI1-A can refer to Table 1 above, in This will not go into details.
  • the reserved 2-bit value in the Reserved field is 00 by default, indicating that the SCI1 is SCI1-A.
  • 1 bit in the Reserved field can be used to indicate the format of the second control information;
  • SCI2-D can include SCI2-A All the fields in , and on this basis, some new fields are added, as shown in Table 3.
  • Table 3 SCI2-A and SCI2-D field interpretation comparison table
  • the HARQ process number field in both SCI2-A and SCI2-D indicates the HARQ processing process number transmitted by the first device.
  • the New data indicator field indicates the NDI information transmitted by the first device in both SCI2-A and SCI2-D.
  • the Redundancy version field, in both SCI2-A and SCI2-D indicates the redundancy version number transmitted by the first device.
  • the Source ID field in both SCI2-A and SCI2-D, indicates that the first device transmits the corresponding source ID.
  • the Destination ID field, in both SCI2-A and SCI2-D indicates that the first device transmits the corresponding destination ID.
  • the HARQ feedback enabled/disabled indicator field indicates whether the first device transmits the associated HARQ feedback is enabled.
  • the Cast type indicator field indicates the Cast type transmitted by the first device in both SCI2-A and SCI2-D.
  • the CSI request field instructs the first device to trigger the CSI fed back by the second device, and in SCI2-D, instructs the first device to instruct the second device to feed back the type of the specified message.
  • SCI2-D also includes: the newly added Frequency resource assignment field, which indicates the reserved frequency domain resources; the newly added Time resource assignment field, which indicates the reserved time domain resources; the newly added Resource reservation period field, which indicates The second device feeds back the period of the specified message.
  • the SCI in the sidelink includes indication information such as time-frequency resources transmitted by the TxUE, and is not related to the time-frequency resources and other information fed back by the RxUE.
  • indication information such as time-frequency resources transmitted by the TxUE
  • new fields are added to carry information such as reserved time-frequency resources, and the SCI is used comprehensively as similar to DL Grant (downlink grant) and UL Grant (uplink grant).
  • SCI2-D instructs the RxUE to feed back information such as the reserved time-frequency resources of the specified message, so as to ensure the timely and successful feedback of important messages, Improve system performance.
  • SCI2-D redefines only one field, and the interpretation of other fields remains unchanged, so that the field interpretation of SCI2-A in the existing protocol is changed as little as possible, and the newly defined SCI2-D is improved. applicability.
  • the first device when the first device sends a message to the second device, if the second device needs to feed back the specified message in a timely and guaranteed manner, it can reserve time-frequency resources for the specified message.
  • the device can send SCI1-A, SCI2-D and the side link physical shared channel to the second device, so that the transmission information of the side link physical shared channel is indicated by SCI1-A, and the second device is indicated by SCI2-D Feedback information such as the time-frequency resources reserved by the specified message, the type of the specified message, and provide information such as modulation and coding through SCI1-A.
  • the first device reserves time-frequency resources for the specified message by sending the sidelink control information SCI2-D, SCI1-A and the sidelink physical shared channel, thereby ensuring timely and successful feedback of the specified message, improving the SL-U communication system performance.
  • Step 602 the second device receives the first control information, the second control information and the data channel sent by the first device;
  • the first control information instructs the first device to send transmission information of the data channel; the first control information includes at least one field indicating the format of the second control information; the format of the second control information includes at least the first format b and the second format b.
  • the first format b indicates that the second device feeds back the time-frequency resource of the specified message; the second format b indicates the redundancy version of the data channel sent by the first device.
  • the second device determines the format of the second control information according to the field indicating the format of the second control information in the first control information; if it is determined that the format of the received second control information is the first format b, for example, the second The second control information received by the device is SCI2-D; then the second device determines information such as the preview time-frequency resource indicated by the field in the first format b, the period of the feedback instruction message, etc., and prepares the information on the reserved time-frequency resource Feedback the specified message expected by the first device.
  • the second device determines the time-frequency resource for feeding back the specified message according to at least one field included in the above-mentioned first format b that indicates the above-mentioned time-frequency resource.
  • the time-frequency resource satisfies the first The time processing capability of the second device for the specified message.
  • the second device may determine the frequency domain resource for feeding back the specified message through the Frequency resource assignment field in SCI2-D, and determine the time domain resource for feeding back the specified message through the Time resource assignment field in SCI2-D.
  • the second device may also use the part of the time-frequency resource with weak or no interference as the time-frequency resource for feeding back the specified message according to the signal interference situation of the above-mentioned time-frequency resource, thereby ensuring transmission performance, and/or, the second device may use a part of the time-frequency resources as the time-frequency resources for feeding back the specified message according to the data amount of the specified message to be fed back, thereby saving overhead.
  • the second device determines the type of the specified message according to at least one field included in the first format b that indicates the specified message. For example, the second device may determine the type of the specified message through the CSI request in SCI2-D.
  • the second device determines the period for feeding back the specified message according to at least one field included in the first format b that indicates the period for the second device to feed back the specified message. For example, the second device may determine the period for feeding back the specified message through the Resource reservation period field in the SCI2-D.
  • the second device determines the first device according to the Source ID field and the Destination ID field in the above-mentioned first format b, and the source identifier and destination identifier of the data link layer L2 included in the data channel. Source identification and destination identification of the control information and the second control information.
  • the second device does not use the above time-frequency resources, so that it can avoid the reserved time-frequency resources to ensure that the designated message can be sent in the time-frequency resource. Timely and successful feedback on resources.
  • the second device may determine whether to perform avoidance on the reserved time-frequency resources according to the priority of the time-frequency resources, so as to ensure successful transmission of data with a higher priority and improve system performance.
  • the transmitting terminal in the transmitting terminal group 401 transmits SCI1-A, SCI2-D and the data channel to the receiving terminal group 402 and the receiving terminal group 403, if a certain receiving terminal group 402 receives
  • the terminal receives SCI1-A, SCI2-D and the data channel, and the destination identifier determined according to the fields in SCI2-D and the data channel is the same as its own identifier, and then prepares to feed back the designated message on the reserved time-frequency resources.
  • the receiving terminal of group 403 receives the SCI1-A, SCI2-D and the data channel, and the destination identifier determined according to the fields in the SCI2-D and the data channel is different from its own identifier, and avoids on the reserved time-frequency resources.
  • Step 603 When the second control information is in the first format b, the second device sends the specified message to the first device, the control information that instructs the second device to send the transmission information of the specified message, and the redundant information that instructs the second device to send the specified message.
  • the second device when the second control information is in the first format b, the second device can directly feed back the specified message to the first device on the reserved time-frequency resources determined in the above step 602, thereby ensuring the timely delivery of the specified message , Successful feedback and improved system performance. At the same time, the second device does not need to select time-frequency resources through channel competition, thereby saving power consumption of the second device.
  • the second device may multiplex the modulation, coding and demodulation pilot information indicated by the first control information on the time-frequency resource determined above, and feed back the content of the specified message that needs to be fed back, thereby ensuring the channel state information.
  • auxiliary resource selection information, positioning information, power control auxiliary information and other designated messages can be fed back effectively and timely to improve system performance.
  • the second device can also feed back the specified message in time according to the determined period of feeding back the specified message, so as to ensure the effective operation of the system.
  • the second device may determine the information according to the Frequency resource assignment, Time resource assignment, CSI request, Resource reservation period and other fields in SCI2-D and The information determined by the fields of Modulation and coding scheme, Number of DMRS port in SCI1-A, and feedback the specified message.
  • the second device may also feed back HARQ for the data channel sent by the first device.
  • the manner of feeding back the above-mentioned HARQ information includes: ACK or NACK.
  • the second device may feed back HARQ for the data channel. If the second device fails to receive the data channel, it transmits HARQ-NACK information on the PSFCH, and otherwise does not transmit information on the PSFCH; or, if the second device successfully receives the data channel, transmits the HARQ-ACK information on the PSFCH, If the reception of the data channel fails, the HARQ-NACK information is transmitted on the PSFCH.
  • Step 604 When the second control information is in the first format b, the first device receives the specified message sent by the second device, instructs the second device to send the control information of the transmission information of the specified message, and instructs the second device to send Control information of the redundant version of the specified message; wherein, the specified message occupies part or all of the time-frequency resource.
  • the first device can directly receive the specified message fed back by the second device on the time-frequency resource, so as to obtain the desired specified message in time.
  • the first device After the first device sends SCI 1-A and SCI2-D, it can receive the specified message fed back by the second device on the time domain resources specified by the Frequency resource assignment field and the Time resource assignment field in SCI2-D.
  • the first device may also receive the HARQ for the data channel fed back by the second device.
  • the reliability of communication between the first device and the second device is improved.
  • the manner of feeding back the above-mentioned HARQ information includes: ACK or NACK.
  • the first device may determine that the second device fails to receive the data channel, and retransmit it.
  • the HARQ information fed back by the channel the first device may determine that the second device successfully received the data channel; or, if the first device receives the HARQ-ACK information fed back by the second device for the data channel, the first device may determine that the second device The device succeeds in receiving the data channel. If the first device receives the HARQ-NACK information fed back by the second device for the data channel, the first device may determine that the second device fails to receive the data channel and retransmit.
  • the first control information instructs the first device to send transmission information of the data channel;
  • the first control information includes at least one field indicating the format of the second control information;
  • the first format b of the second control information is used to indicate
  • the second device feeds back time-frequency resources of the designated message; in this way, by reserving time-frequency resources for the designated message, timely and successful feedback of the designated message is ensured, and system performance is improved.
  • an embodiment of the present application further provides a communication device.
  • FIG. 7 shows a structural diagram of a communication apparatus according to an embodiment of the present application.
  • the apparatus may include: a first module 701 and a second module 702 .
  • the first module 701 is configured to: the first device sends first control information and second control information to the second device, where the first control information includes at least one of the first field or the second field, the first At least one of the first field or the second field indicates the format of the first control information, and at least one of the first field or the second field indicates the format of the second control information; the format of the first control information includes at least the first format a and the first control information.
  • Two formats a instructs the second device to feed back the time-frequency resources of the specified message; the second format a instructs the first device to send the transmission information of the data channel; the format of the second control information at least includes the third format and the fourth format , the third format indicates the redundancy version of the specified message fed back by the second device; the fourth format indicates the redundancy version of the data channel sent by the first device; the second module 702 is used for: when the first control information is the first format a, When the second control information is in the third format, the first device receives the specified message fed back by the second device on the time-frequency resource.
  • the above-mentioned first format a further includes: at least one field indicating the time-frequency resource.
  • the above-mentioned third format further includes: at least one field indicating a designated message, wherein the designated message includes at least one of channel state information, auxiliary resource selection information, positioning information, and power control auxiliary information one.
  • the above-mentioned first format a further includes: at least one field indicating modulation, coding and demodulation pilot information used when the second device feeds back the above-mentioned specified message.
  • the above-mentioned first format a further includes: at least one field indicating a period during which the second device feeds back the specified message.
  • the above-mentioned third format further includes: all bits of the source identifiers of the first control information and the second control information, and all bits of the destination identifiers of the first control information and the second control information.
  • the above-mentioned time-frequency resources satisfy the time processing capability of the second device for the specified message.
  • the above-mentioned first control information or the second control information includes: sidelink control information
  • the above-mentioned data channel includes: a sidelink physical shared channel.
  • the first device sends the first control information and the second control information to the second device, where the first control information includes at least one of a first field or a second field, and the first field or the second field At least one of the two fields indicates the format of the first control information, and at least one of the first field or the second field indicates the format of the second control information; the first device indicates by the first format a of the first control information
  • the second device feeds back the time-frequency resource of the specified message, instructs the second device to feed back the redundant version of the specified message through the third format of the second control information, and receives the specified message fed back by the second device on the time-frequency resource; thus , by reserving time-frequency resources for the designated message, the first device ensures timely and successful feedback of the designated message and improves system performance.
  • the first device directly receives the designated message fed back by the second device on the time-frequency resource. , there is no need to blindly detect the time-frequency resource where the specified message is located, and no need to detect control information, which saves the power consumption of the first device.
  • the first module 701 is configured to: the second device receives the first control information and the second control information sent by the first device; the first control information includes at least one of the first field or the second field, At least one of the first field or the second field indicates the format of the first control information, and at least one of the first field or the second field indicates the format of the second control information; the format of the first control information includes at least the first format a and the second format a, the first format a indicates the time-frequency resource of the second device to feed back the specified message; the second format a indicates the first device to send the transmission information of the data channel; the format of the second control information includes at least the third format and the first format.
  • the third format indicates the redundant version of the specified message fed back by the second device;
  • the fourth format indicates the redundant version of the data channel sent by the first device;
  • the second module 702 is used for: when the first control information is in the first format a.
  • the second device feeds back a specified message to the first device on the time-frequency resource.
  • the above-mentioned first format a further includes: at least one field indicating the above-mentioned time-frequency resource.
  • the above-mentioned third format further includes: at least one field indicating a designated message, wherein the designated message includes: at least one of channel state information, auxiliary resource selection information, positioning information, and power control auxiliary information item.
  • the above-mentioned first format a further includes: at least one field indicating modulation, coding and demodulation pilot information used when the second device feeds back the specified message.
  • the above-mentioned first format a further includes: at least one field indicating a period during which the second device feeds back the specified message.
  • the above-mentioned third format further includes: all bits of the source identifiers of the first control information and the second control information, and all bits of the destination identifiers of the first control information and the second control information.
  • the above-mentioned first module 701 is further configured to: when the destination identifier is different from the self identifier of the second device, the second device does not use the above-mentioned time-frequency resource.
  • the above-mentioned time-frequency resources satisfy the time processing capability of the second device for the specified message.
  • the second device receives the first control information and the second control information sent by the first device, where the first control information includes at least one of a first field or a second field, and the first field or At least one of the second fields indicates the format of the first control information, and at least one of the first field or the second field indicates the format of the second control information; the first format a of the first control information indicates the second device Feedback the time-frequency resources of the specified message, and the third format of the second control information indicates that the second device feeds back the redundant version of the specified message, when the first control information is the first format a and the second control information is the third type of format , the second device feeds back the specified message to the first device on the time-frequency resource; in this way, the second device feeds back the specified message on the reserved time-frequency resource, thereby ensuring timely and successful feedback of the specified message, improving the system At the same time, when the second device sends the specified message, it does not need to select time-frequency resources through channel competition, nor does it need to
  • the first module 701 is used for: the first device sends the first control information, the second control information and the data channel to the second device; the first control information instructs the first device to send the transmission information of the data channel;
  • the first control information includes at least one field indicating the format of the second control information;
  • the format of the second control information includes at least a first format b and a second format b, and the first format b indicates a time-frequency resource for the second device to feed back a specified message
  • the second format b indicates that the first device sends the redundant version of the data channel;
  • the second module 702 is used for: when the second control information is the first format b, the first device receives the specified message, the instruction sent by the second device
  • the second device sends the control information of the transmission information of the designated message, and the control information instructing the second device to send the redundant version of the designated message; wherein the designated message occupies part or all of the time-frequency resources.
  • the above-mentioned first format b further includes: at least one field indicating the above-mentioned time-frequency resource.
  • the above-mentioned first format b further includes: at least one field indicating a designated message, wherein the designated message includes at least one of channel state information, auxiliary resource selection information, positioning information, and power control auxiliary information one.
  • the above-mentioned first format b further includes: at least one field indicating a period during which the second device feeds back the specified message.
  • the above-mentioned time-frequency resources satisfy the time processing capability of the second device for the specified message.
  • the above-mentioned first control information or second control information includes: sidelink control information
  • the data channel includes: a sidelink physical shared channel.
  • the first device sends the first control information, the second control information and the data channel to the second device; the first control information instructs the first device to send transmission information of the data channel; Two at least one field of the format of the control information; the first device instructs the second device to feed back the time-frequency resources of the specified message through the first format b of the second control information; and receives the specified message sent by the second device, instructing the second device
  • the control information for sending the transmission information of the designated message, and the control information for instructing the second device to send the redundant version of the designated message, the sixth control information is used to instruct the second device to send the redundant version of the designated message, and the designated message Part or all of the time-frequency resource is occupied; in this way, the first device reserves the time-frequency resource for the specified message, thereby ensuring timely and successful feedback of the specified message and improving system performance.
  • the first module 701 is configured to: the second device receives the first control information, the second control information and the data channel sent by the first device; the first control information instructs the first device to send the transmission information of the data channel ; the first control information includes at least one field indicating the format of the second control information; the format of the second control information includes at least a first format b and a second format b, and the first format b indicates the time-frequency at which the second device feeds back the specified message resource; the second format b instructs the first device to send the redundant version of the data channel; the second module 702 is used for: when the second control information is in the first format b, the second device sends a specified message, an instruction to the first device The second device sends the control information of the transmission information of the designated message, and the control information instructing the second device to send the redundant version of the designated message; wherein the designated message occupies part or all of the time-frequency resources.
  • the above-mentioned first format b further includes: at least one field indicating the above-mentioned time-frequency resource.
  • the above-mentioned first format b further includes: at least one field indicating a designated message, wherein the designated message includes at least one of channel state information, auxiliary resource selection information, positioning information, and power control auxiliary information one.
  • the above-mentioned first format b further includes: at least one field indicating a period during which the second device feeds back the specified message.
  • the above-mentioned time-frequency resources satisfy the time processing capability of the second device for the specified message.
  • the second device receives the first control information, the second control information, and the data channel sent by the first device; the first control information instructs the first device to send transmission information of the data channel; at least one field of the format of the second control information; the first format b of the second control information is used to instruct the second device to feed back the time-frequency resources of the specified message; when the second control information is in the first format b, the second device sends The first device sends the designated message, the control information instructing the second device to send the transmission information of the designated message, and the control information instructing the second device to send the redundant version of the designated message, and the designated message occupies part or all of the time-frequency In this way, the second device feeds back the specified message on some or all of the reserved time-frequency resources, thereby ensuring timely and successful feedback of the specified message and improving system performance; at the same time, when the second device sends the specified message, There is no need to select time-frequency resources through channel competition, which saves the power consumption of the second device.
  • An embodiment of the present application further provides a communication system, where the communication system includes the first device and the second device in any of the foregoing embodiments, where the first device is configured to execute the technical solution shown in FIG. 5 , and the second device is configured to execute the technical solution shown in FIG. 5 . Execute the technical solution shown in FIG. 5 .
  • An embodiment of the present application further provides a communication system, where the communication system includes the first device and the second device in any of the foregoing embodiments, where the first device is configured to execute the technical solution shown in FIG. 6 , and the second device is configured to execute the technical solution shown in FIG. 6 . Execute the technical solution shown in FIG. 6 .
  • FIG. 8 shows a schematic structural diagram of a communication apparatus according to an embodiment of the present application.
  • the communication apparatus may include: at least one processor 3101 , a communication line 3102 , a memory 3103 and at least one communication interface 3104 .
  • the processor 3101 may be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more processors for controlling the execution of the programs of the present application. integrated circuit.
  • CPU central processing unit
  • ASIC application-specific integrated circuit
  • Communication line 3102 may include a path to communicate information between the components described above.
  • the communication interface 3104 using any transceiver-like device, is used to communicate with other devices or communication networks, such as Ethernet, RAN, wireless local area networks (WLAN), and the like.
  • devices or communication networks such as Ethernet, RAN, wireless local area networks (WLAN), and the like.
  • Memory 3103 may be read-only memory (ROM) or other types of static storage devices that can store static information and instructions, random access memory (RAM) or other types of information and instructions It can also be an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disk storage, CD-ROM storage (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or capable of carrying or storing desired program code in the form of instructions or data structures and capable of being executed by a computer Access any other medium without limitation.
  • the memory may be separate and connected to the processor via communication line 3102. The memory can also be integrated with the processor.
  • the memory provided by the embodiments of the present application may generally be non-volatile.
  • the memory 3103 is used for storing computer-executed instructions for executing the solution of the present application, and the execution is controlled by the processor 3101 .
  • the processor 3101 is configured to execute the computer-executed instructions stored in the memory 3103, thereby implementing the methods provided in the foregoing embodiments of the present application.
  • the computer-executed instructions in the embodiment of the present application may also be referred to as application code, which is not specifically limited in the embodiment of the present application.
  • the processor 3101 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 8 .
  • the communication apparatus may include multiple processors, for example, the processor 3101 and the processor 3107 in FIG. 8 .
  • processors can be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor.
  • a processor herein may refer to one or more devices, circuits, and/or processing cores for processing data (eg, computer program instructions).
  • the communication apparatus may further include an output device 3105 and an input device 3106 .
  • the output device 3105 is in communication with the processor 3101 and can display information in a variety of ways.
  • the output device 3105 may be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector (projector) Wait.
  • Input device 3106 is in communication with processor 3101 and can receive user input in a variety of ways.
  • the input device 3106 may be a mouse, a keyboard, a touch screen device, a sensor device, or the like.
  • the first module 701 and the second module 702 in FIG. 7 may be implemented by the communication interface 3104 and the processor 3101 in FIG. 8 , and this embodiment of the present application does not make any limit.
  • FIG. 9 shows a schematic structural diagram of a chip according to an embodiment of the present application.
  • the chip shown in FIG. 9 may be a general-purpose processor or a special-purpose processor.
  • the chip includes processor 3201 .
  • the processor 3201 is configured to support the communication apparatus to execute the technical solution shown in FIG. 5 or FIG. 6 .
  • the chip further includes a transceiver 3202, and the transceiver 3202 is configured to accept the control of the processor 3201 to support the communication device to perform the above technical solution, for example, the method shown in FIG. 5 or FIG. 6 may be performed.
  • the chip shown in FIG. 9 may further include: a storage medium 3203 .
  • the chip shown in FIG. 9 can be implemented using the following circuits or devices: one or more field programmable gate arrays (FPGA), programmable logic device (PLD) , controllers, state machines, gate logic, discrete hardware components, any other suitable circuits, or any combination of circuits capable of performing the various functions described throughout this application.
  • FPGA field programmable gate arrays
  • PLD programmable logic device
  • controllers state machines
  • gate logic discrete hardware components
  • discrete hardware components any other suitable circuits, or any combination of circuits capable of performing the various functions described throughout this application.
  • FIG. 5 or The method shown in Figure 6.
  • Embodiments of the present application provide a computer program product, including computer-readable codes, or a non-volatile computer-readable storage medium carrying computer-readable codes, when the computer-readable codes are stored in a processor of an electronic device During operation, the processor in the electronic device executes the foregoing technical solution, and exemplarily, the method shown in FIG. 5 or FIG. 6 may be executed.
  • a computer-readable storage medium may be a tangible device that can hold and store instructions for use by the instruction execution device.
  • the computer-readable storage medium may be, for example, but not limited to, an electrical storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination of the foregoing.
  • Computer readable program instructions or code described herein may be downloaded to various computing/processing devices from a computer readable storage medium, or to an external computer or external storage device over a network such as the Internet, a local area network, a wide area network and/or a wireless network.
  • the network may include copper transmission cables, fiber optic transmission, wireless transmission, routers, firewalls, switches, gateway computers, and/or edge servers.
  • a network adapter card or network interface in each computing/processing device receives computer-readable program instructions from a network and forwards the computer-readable program instructions for storage in a computer-readable storage medium in each computing/processing device .
  • the computer program instructions used to perform the operations of the present application may be assembly instructions, Instruction Set Architecture (ISA) instructions, machine instructions, machine-related instructions, microcode, firmware instructions, state setting data, or in one or more source or object code written in any combination of programming languages, including object-oriented programming languages such as Smalltalk, C++, etc., and conventional procedural programming languages such as the "C" language or similar programming languages.
  • the computer readable program instructions may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer, or entirely on the remote computer or server implement.
  • the remote computer may be connected to the user's computer through any kind of network—including a Local Area Network (LAN) or a Wide Area Network (WAN)—or, may be connected to an external computer (eg, use an internet service provider to connect via the internet).
  • electronic circuits such as programmable logic circuits, Field-Programmable Gate Arrays (FPGA), or Programmable Logic Arrays (Programmable Logic Arrays), are personalized by utilizing state information of computer-readable program instructions.
  • Logic Array, PLA the electronic circuit can execute computer readable program instructions to implement various aspects of the present application.
  • These computer readable program instructions may be provided to a processor of a general purpose computer, special purpose computer or other programmable data processing apparatus to produce a machine that causes the instructions when executed by the processor of the computer or other programmable data processing apparatus , resulting in means for implementing the functions/acts specified in one or more blocks of the flowchart and/or block diagrams.
  • These computer readable program instructions can also be stored in a computer readable storage medium, these instructions cause a computer, programmable data processing apparatus and/or other equipment to operate in a specific manner, so that the computer readable medium on which the instructions are stored includes An article of manufacture comprising instructions for implementing various aspects of the functions/acts specified in one or more blocks of the flowchart and/or block diagrams.
  • Computer readable program instructions can also be loaded onto a computer, other programmable data processing apparatus, or other equipment to cause a series of operational steps to be performed on the computer, other programmable data processing apparatus, or other equipment to produce a computer-implemented process , thereby causing instructions executing on a computer, other programmable data processing apparatus, or other device to implement the functions/acts specified in one or more blocks of the flowcharts and/or block diagrams.
  • each block in the flowchart or block diagrams may represent a module, segment, or portion of instructions, which comprises one or more functions for implementing the specified logical function(s) executable instructions.
  • the functions noted in the blocks may occur out of the order noted in the figures. For example, two blocks in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved.
  • each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations can be implemented in hardware (eg, circuits or ASICs (Application) that perform the corresponding functions or actions. Specific Integrated Circuit, application-specific integrated circuit)), or can be implemented by a combination of hardware and software, such as firmware.

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Abstract

本申请涉及一种通信方法、装置、芯片、存储介质及程序产品，其中，该方法包括：第一设备向第二设备发送第一控制信息和第二控制信息，第一控制信息中第一字段或第二字段中的至少一个指示第一控制信息的格式、第二控制信息的格式；第一控制信息的第一格式指示第二设备反馈指定消息的时频资源；第二控制信息的第三格式指示第二设备反馈指定消息的冗余版本；在第一控制信息为第一格式、第二控制信息为第三格式时，第一设备在时频资源上接收第二设备反馈的指定消息。通过本申请中，第一设备通过为指定消息预留时频资源，从而保证指定消息的及时、成功地反馈，提升***性能。

Description

一种通信方法、装置、芯片、存储介质及程序产品
本申请要求于2020年11月24日提交中国专利局、申请号为202011332625.X、发明名称为“一种消息反馈的方法”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
本申请要求于2020年12月30日提交中国专利局、申请号为202011607154.9、发明名称为“一种通信方法、装置、芯片、存储介质及程序产品”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域，尤其涉及一种通信方法、装置、芯片、存储介质及程序产品。
背景技术
侧行链路(Sidelink，SL)通信技术是蜂窝物联网技术的一个重要分支，是一种终端与终端之间直连的通信技术，又称物物通信技术(Device to Device Communication，D2D)。该通信技术为物联应用创造了广阔的应用前景,例如，车联网通信(Vehicle-to-everything，V2X)是基于侧行链路的架构进行的场景扩展和技术演进。
侧行链路占用的频谱资源可分为两类：授权频谱(License Spectrum)和非授权频谱(Unlicense Spectrum)。其中，授权频谱受到严格的限制和保护，只允许符合规范的终端接入，在侧行链路占用授权频谱(License Spectrum)时，需要与长期演进(Long Term Evolution，LTE)/新空口(New Radio，NR)网络的频谱资源进行协调，导致使用的场景可能受限，速率也无法进一步提高。而非授权频谱是开放的，可以加以利用来提升性能和速率；非授权频谱的非授权性，使得所有通信***都可以在上面传输数据，为了规范公平性和平衡性能，且不能造成无谓的干扰，标准定义了信道竞争的技术规范，使得设备占用非授权频谱时的行为符合预期；由于占用非授权频谱时终端需要进行信道竞争才能发送数据，若信道竞争失败，则终端可能没有数据发送的机会。
在侧行链路占用非授权频谱(Sidelink Unlicense，SL-U)时，终端有很多重要的消息承载在数据信道中需要及时反馈，来保障通信***的性能和通信***的有效运转，然而，若信道竞争失败，可能导致这些重要的消息无法及时地反馈。
发明内容
有鉴于此，提出了一种通信方法、装置、芯片、存储介质及程序产品。
第一方面，本申请的实施例提供了一种通信方法；该方法包括：第一设备向第二设备发送第一控制信息和第二控制信息，第一控制信息包含第一字段或第二字段中的至少一个，第一字段或第二字段中的至少一个指示该第一控制信息的格式，第一字段或第二字段中的至少一个指示该第二控制信息的格式；第一控制信息的格式至少包括第一格式和第二格式，第一格式指示该第二设备反馈指定消息的时频资源，第二格式指示该第一设备发送数据信道的传输信息；第二控制信息的格式至少包括第三格式和第四格式，第三格式指示该第二设备反馈 该指定消息的冗余版本，第四格式指示该第一设备发送该数据信道的冗余版本；在该第一控制信息为第一格式，该第二控制信息为第三格式时，第一设备在该时频资源上接收第二设备反馈的该指定消息。
基于上述技术方案，第一设备向第二设备发送第一控制信息和第二控制信息，其中，该第一控制信息包含第一字段或第二字段中的至少一个，该第一字段或第二字段中的至少一个指示该第一控制信息的格式，该第一字段或第二字段中的至少一个指示该第二控制信息的格式；第一设备通过第一控制信息的第一格式指示第二设备反馈指定消息的时频资源，通过第二控制信息的第三格式指示第二设备反馈指定消息的冗余版本，并在该时频资源上接收第二设备反馈的该指定消息；这样，第一设备通过为指定消息预留时频资源，从而保证指定消息的及时、成功地反馈，提升***性能，同时，第一设备直接在该时频资源上接收第二设备反馈的该指定消息，无需盲检该指定消息所在的时频资源，也无需检测控制信息，节省了第一设备的功耗。
根据第一方面，在所述第一方面的第一种可能的实现方式中，上述第一格式还包括：指示该时频资源的至少一个字段。
基于上述技术方案，第一格式包括指示指定消息的时频资源的至少一个字段，第一设备通过该字段为第二设备反馈指定消息预留时频资源，保证该指定消息可以在该时频资源上及时、成功地反馈。
根据第一方面，在所述第一方面的第二种可能的实现方式中，上述第三格式还包括：指示指定消息的至少一个字段，其中，该指定消息包括：信道状态信息(channel state information，CSI)、辅助资源选择信息、定位信息、功率控制辅助信息中的至少一项。
基于上述技术方案，第一格式包括指示指定消息的至少一个字段，第一设备通过该字段指示第二设备需要反馈的指定消息内容，从而保证信道状态信息、辅助资源选择信息、定位信息、功率控制辅助信息等指定消息可以有效及时地反馈，提升***性能。
根据第一方面，在所述第一方面的第三种可能的实现方式中，上述第一格式还包括：指示第二设备反馈上述指定消息时使用的调制编码及解调导频信息的至少一个字段。
基于上述技术方案，第一格式包括指示第二设备反馈上述指定消息时使用的调制编码及解调导频信息的至少一个字段；第一设备通过该字段指示第二设备使用该调制编码及解调导频信息反馈该指定消息；从而保证指定消息的及时、成功地反馈。
根据第一方面，在所述第一方面的第四种可能的实现方式中，上述第一格式还包括：指示第二设备反馈指定消息的周期的至少一个字段。
基于上述技术方案，第一格式包括指示第二设备反馈指定消息的周期的至少一个字段，第一设备通过该字段指示第二设备按照该周期反馈指定消息，从而可以保障***的有效运转。
根据第一方面，在所述第一方面的第五种可能的实现方式中，上述第三格式还包括：第一控制信息和第二控制信息的源标识的所有比特，及第一控制信息和第二控制信息的目的地标识的所有比特。
基于上述技术方案，第三格式包括：第一控制信息和第二控制信息的源标识的所有比特，及第一控制信息和第二控制信息的目的地标识的所有比特。第一设备通过该字段可以清楚的指示第一控制信息和第二控制信息的源标识及目的地标识，从而保证第一设备所期望的对象及时、成功地反馈指定消息。
根据第一方面，在所述第一方面的第六种可能的实现方式中，上述时频资源满足第二设备针对指定消息的时间处理能力。
基于上述技术方案，考虑到第二设备针对指定消息的时间处理能力，第一设备为第二设备预留的时频资源满足第二设备针对指定消息的时间处理能力，从而可以保证第二设备有时间处理指定消息，并将处理后的指定消息及时、成功地反馈，保障***的有效运转。
根据第一方面或者第一方面的上述多种可能的实现方式中，在所述第一方面的第七种可能的实现方式中，上述第一控制信息或第二控制信息包括：侧行链路控制信息(Sidelink Control Information，SCI)，上述数据信道包括：侧行链路物理共享信道(Physical Sidelink Share Channel，PSSCH)。
基于上述技术方案，第一控制信息或第二控制信息可以为侧行链路控制信息，数据信道可以为侧行链路物理共享信道，即第一设备与第二设备通过侧行链路通信，第一设备通过为指定消息预留时频资源，从而保证指定消息的及时、成功地反馈，提升SL-U通信***性能。
第二方面，本申请的实施例提供了一种通信方法；该方法包括：第二设备接收第一设备发送的第一控制信息和第二控制信息；第一控制信息包含第一字段或第二字段中的至少一个，第一字段或第二字段中的至少一个指示第一控制信息的格式，第一字段或第二字段中的至少一个指示第二控制信息的格式；第一控制信息的格式至少包括第一格式和第二格式，第一格式指示该第二设备反馈指定消息的时频资源，第二格式指示该第一设备发送数据信道的传输信息；第二控制信息的格式至少包括第三格式和第四格式，第三格式指示该第二设备反馈指定消息的冗余版本，第四格式指示该第一设备发送数据信道的冗余版本；在该第一控制信息为第一格式，该第二控制信息为第三格式时，第二设备在时频资源上向第一设备反馈该指定消息。
基于上述技术方案，第二设备接收第一设备发送的第一控制信息和第二控制信息，其中，该第一控制信息包含第一字段或第二字段中的至少一个，该第一字段或第二字段中的至少一个指示该第一控制信息的格式，该第一字段或第二字段中的至少一个指示该第二控制信息的格式；第一控制信息的第一格式指示第二设备反馈指定消息的时频资源，第二控制信息的第三格式指示第二设备反馈指定消息的冗余版本，在第一控制信息为第一格式，且第二控制信息为第三类格式时，第二设备在该时频资源上向第一设备反馈该指定消息；这样，第二设备在预留的时频资源上反馈该指定消息，从而保证指定消息的及时、成功地反馈，提升***性能，同时，第二设备在发送该指定消息时，无需通过信道竞争选择时频资源，也无需发送控制信息，节省了第二设备的功耗。
根据第二方面，在所述第二方面的第一种可能的实现方式中，上述第一格式还包括：指示时频资源的至少一个字段。
基于上述技术方案，第一格式包括指示指定消息的时频资源的至少一个字段，第二设备通过该字段确定为指定消息预留的时频资源，并在该时频资源上反馈该指定消息，从而保证该指定消息及时、成功地反馈。
根据第二方面，在所述第二方面的第二种可能的实现方式中，上述第三格式还包括：指示指定消息的至少一个字段，其中，指定消息包括：信道状态信息、辅助资源选择信息、定位信息、功率控制辅助信息中的至少一项。
基于上述技术方案，第一格式包括指示指定消息的至少一个字段，第二设备通过该字段 确定需要反馈的指定消息内容，从而保证信道状态信息、辅助资源选择信息、定位信息、功率控制辅助信息等指定消息可以有效及时地反馈，提升***性能。
根据第二方面，在所述第二方面的第三种可能的实现方式中，上述第一格式还包括：指示第二设备反馈指定消息时使用的调制编码及解调导频信息的至少一个字段。
基于上述技术方案，第一格式包括指示第二设备反馈上述指定消息时使用的调制编码及解调导频信息的至少一个字段；第二设备通过该字段确定发送指定消息时所使用的调制编码及解调导频信息，并通过该调制编码及解调导频信息反馈该指定消息；从而保证指定消息的及时、成功地反馈。
根据第二方面，在所述第二方面的第四种可能的实现方式中，上述第一格式还包括：指示第二设备反馈指定消息的周期的至少一个字段。
基于上述技术方案，第一格式包括指示第二设备反馈指定消息的周期的至少一个字段，第二设备通过该字段确定该反馈该指定消息的周期，并按照该周期及时反馈该指定消息，从而可以保障***的有效运转。
根据第二方面，在所述第二方面的第五种可能的实现方式中，上述第三格式还包括：第一控制信息和第二控制信息的源标识的所有比特，及第一控制信息和第二控制信息的目的地标识的所有比特。
基于上述技术方案，第三格式包括：第一控制信息和第二控制信息的源标识的所有比特，及第一控制信息和第二控制信息的目的地标识的所有比特。第二设备通过该字段可以确定第一控制信息和第二控制信息的源标识及目的地标识，从而确定第二设备为第一设备所期望的对象，并及时、成功地反馈指定消息。
根据第二方面的第五种可能的实现方式，在所述第二方面的第六种可能的实现方式中，上述方法还包括：在目的地标识与第二设备的自身标识不同时，第二设备不使用上述时频资源。
基于上述技术方案，第二设备通过该字段可以确定第一控制信息和第二控制信息的源标识及目的地标识，在目的地标识与第二设备的自身标识不同时，第二设备不使用该时频资源，从而可以在预留的时频资源上进行避让，保证指定消息在该时频资源上及时、成功地反馈。
根据第二方面，在所述第二方面的第七种可能的实现方式中，时频资源满足所述第二设备针对所述指定消息的时间处理能力。
基于上述技术方案，考虑到第二设备针对指定消息的时间处理能力，预留的时频资源满足第二设备针对指定消息的时间处理能力，从而可以保证第二设备有时间处理指定消息，并将处理后的指定消息及时、成功地反馈，保障***的有效运转。
第三方面，本申请的实施例提供了一种通信方法；该方法包括：第一设备向第二设备发送第一控制信息、第二控制信息及数据信道；第一控制信息指示第一设备发送数据信道的传输信息；第一控制信息包括指示第二控制信息的格式的至少一个字段；第二控制信息的格式至少包括第一格式和第二格式，第一格式指示第二设备反馈指定消息的时频资源，第二格式指示第一设备发送数据信道的冗余版本；在该第二控制信息为第一格式时，第一设备接收第二设备发送的该指定消息、指示第二设备发送该指定消息的传输信息的控制信息、及指示第二设备发送该指定消息的冗余版本的控制信息；其中，该指定消息占用部分或全部该时频资源。
基于上述技术方案，第一设备向第二设备发送第一控制信息、第二控制信息及数据信道；第一控制信息指示第一设备发送数据信道的传输信息；第一控制信息包括指示第二控制信息的格式的至少一个字段；第一设备通过第二控制信息的第一格式指示第二设备反馈指定消息的时频资源；并接收第二设备发送的该指定消息、指示第二设备发送该指定消息的传输信息的控制信息、及指示第二设备发送该指定消息的冗余版本的控制信息，第六控制信息用于指示第二设备发送该指定消息的冗余版本，且指定消息占用部分或全部该时频资源；这样，第一设备通过为指定消息预留时频资源，从而保证指定消息的及时、成功地反馈，提升***性能。
根据第三方面，在所述第三方面的第一种可能的实现方式中，上述第一格式还包括：指示上述时频资源的至少一个字段。
基于上述技术方案，第一格式包括指示指定消息的时频资源的至少一个字段，第一设备通过该字段为第二设备反馈指定消息预留时频资源，保证该指定消息可以在该时频资源的部分或全部上及时、成功地反馈。
根据第三方面，在所述第三方面的第二种可能的实现方式中，上述第一格式还包括：指示指定消息的至少一个字段，其中，指定消息包括：信道状态信息、辅助资源选择信息、定位信息、功率控制辅助信息中的至少一项。
基于上述技术方案，第一格式包括指示指定消息的至少一个字段，第一设备通过该字段指示第二设备需要反馈的指定消息内容，从而保证信道状态信息、辅助资源选择信息、定位信息、功率控制辅助信息等指定消息可以有效及时地反馈，提升***性能。
根据第三方面，在所述第三方面的第三种可能的实现方式中，上述第一格式还包括：指示第二设备反馈指定消息的周期的至少一个字段。
基于上述技术方案，第一格式包括指示第二设备反馈指定消息的周期的至少一个字段，第一设备通过该字段指示第二设备按照该周期反馈指定消息，从而可以保障***的有效运转。
根据第三方面，在所述第三方面的第四种可能的实现方式中，上述时频资源满足第二设备针对指定消息的时间处理能力。
基于上述技术方案，考虑到第二设备针对指定消息的时间处理能力，第一设备为第二设备预留的时频资源满足第二设备针对指定消息的时间处理能力，从而可以保证第二设备有时间处理指定消息，并将处理后的指定消息及时、成功地反馈，保障***的有效运转。
根据第三方面，在所述第三方面的第五种可能的实现方式中，上述第一控制信息或第二控制信息包括：侧行链路控制信息，数据信道包括：侧行链路物理共享信道。
基于上述技术方案，第一控制信息或第二控制信息可以为侧行链路控制信息，数据信道可以为侧行链路物理共享信道，即第一设备与第二设备通过侧行链路通信，第一设备通过为指定消息预留时频资源，从而保证指定消息的及时、成功地反馈，提升SL-U通信***性能。
第四方面，本申请的实施例提供了一种通信方法；该方法包括：第二设备接收第一设备发送的第一控制信息、第二控制信息及数据信道；第一控制信息指示第一设备发送数据信道的传输信息；第一控制信息包括指示第二控制信息的格式的至少一个字段；第二控制信息的格式至少包括第一格式和第二格式，第一格式指示第二设备反馈指定消息的时频资源，第二格式指示第一设备发送数据信道的冗余版本。在第二控制信息为第一格式时，第二设备向第一设备发送指定消息、指示第二设备发送指定消息的传输信息的控制信息、及指示第二设备 发送指定消息的冗余版本的控制信息；其中，该指定消息占用部分或全部所述时频资源。
基于上述技术方案，第二设备接收第一设备发送的第一控制信息、第二控制信息及数据信道；第一控制信息指示第一设备发送数据信道的传输信息；第一控制信息包括指示第二控制信息的格式的至少一个字段；第二控制信息的第一格式用于指示第二设备反馈指定消息的时频资源；在该第二控制信息为第一格式时，第二设备向所第一设备发送该指定消息、指示第二设备发送指定消息的传输信息的控制信息、及指示第二设备发送指定消息的冗余版本的控制信息，且该指定消息占用部分或全部该时频资源；这样，第二设备在部分或全部预留的时频资源上反馈该指定消息，从而保证指定消息的及时、成功地反馈，提升***性能；同时，第二设备在发送该指定消息时，无需通过信道竞争选择时频资源，节省了第二设备的功耗。
根据第四方面，在所述第四方面的第一种可能的实现方式中，上述第一格式还包括：指示上述时频资源的至少一个字段。
基于上述技术方案，第一格式包括指示指定消息的时频资源的至少一个字段，第二设备通过该字段确定为指定消息预留的时频资源，并在该时频资源上反馈该指定消息，从而保证该指定消息及时、成功地反馈。
根据第四方面，在所述第四方面的第二种可能的实现方式中，上述第一格式还包括：指示指定消息的至少一个字段，其中，指定消息包括：信道状态信息、辅助资源选择信息、定位信息、功率控制辅助信息中的至少一项。
基于上述技术方案，第一格式包括指示指定消息的至少一个字段，第二设备通过该字段确定需要反馈的指定消息内容，从而保证信道状态信息、辅助资源选择信息、定位信息、功率控制辅助信息等指定消息可以有效及时地反馈，提升***性能。
根据第四方面，在所述第四方面的第三种可能的实现方式中，上述第一格式还包括：指示第二设备反馈指定消息的周期的至少一个字段。
基于上述技术方案，第一格式包括指示第二设备反馈指定消息的周期的至少一个字段，第二设备通过该字段确定该反馈该指定消息的周期，并按照该周期及时反馈该指定消息，从而可以保障***的有效运转。
根据第四方面，在所述第四方面的第四种可能的实现方式中，上述时频资源满足第二设备针对指定消息的时间处理能力。
基于上述技术方案，考虑到第二设备针对指定消息的时间处理能力，预留的时频资源满足第二设备针对指定消息的时间处理能力，从而可以保证第二设备有时间处理指定消息，并将处理后的指定消息及时、成功地反馈，保障***的有效运转。
第五方面，本申请的实施例提供了一种通信装置，该装置包括：第一模块，该第一模块用于：第一设备向第二设备发送第一控制信息和第二控制信息，第一控制信息包含第一字段或第二字段中的至少一个，第一字段或第二字段中的至少一个指示第一控制信息的格式，第一字段或第二字段中的至少一个指示第二控制信息的格式；第一控制信息的格式至少包括第一格式和第二格式，第一格式指示第二设备反馈指定消息的时频资源，第二格式指示第一设备发送数据信道的传输信息；第二控制信息的格式至少包括第三格式和第四格式，第三格式指示第二设备反馈指定消息的冗余版本，第四格式指示第一设备发送数据信道的冗余版本；第二模块，该第二模块用于：在第一控制信息为第一格式，第二控制信息为第三格式时，第一设备在时频资源上接收第二设备反馈的指定消息。
基于上述技术方案，第一设备向第二设备发送第一控制信息和第二控制信息，其中，该第一控制信息包含第一字段或第二字段中的至少一个，该第一字段或第二字段中的至少一个指示该第一控制信息的格式，该第一字段或第二字段中的至少一个指示该第二控制信息的格式；第一设备通过第一控制信息的第一格式指示第二设备反馈指定消息的时频资源，通过第二控制信息的第三格式指示第二设备反馈指定消息的冗余版本，并在该时频资源上接收第二设备反馈的该指定消息；这样，第一设备通过为指定消息预留时频资源，从而保证指定消息的及时、成功地反馈，提升***性能，同时，第一设备直接在该时频资源上接收第二设备反馈的该指定消息，无需盲检该指定消息所在的时频资源，也无需检测控制信息，节省了第一设备的功耗。
根据第五方面，在所述第五方面的第一种可能的实现方式中，上述第一格式还包括：指示该时频资源的至少一个字段。
基于上述技术方案，第一格式包括指示指定消息的时频资源的至少一个字段，第一设备通过该字段为第二设备反馈指定消息预留时频资源，保证该指定消息可以在该时频资源上及时、成功地反馈。
根据第五方面，在所述第五方面的第二种可能的实现方式中，上述第三格式还包括：指示指定消息的至少一个字段，其中，该指定消息包括：信道状态信息、辅助资源选择信息、定位信息、功率控制辅助信息中的至少一项。
基于上述技术方案，第一格式包括指示指定消息的至少一个字段，第一设备通过该字段指示第二设备需要反馈的指定消息内容，从而保证信道状态信息、辅助资源选择信息、定位信息、功率控制辅助信息等指定消息可以有效及时地反馈，提升***性能。
根据第五方面，在所述第五方面的第三种可能的实现方式中，上述第一格式还包括：指示第二设备反馈上述指定消息时使用的调制编码及解调导频信息的至少一个字段。
基于上述技术方案，第一格式包括指示第二设备反馈上述指定消息时使用的调制编码及解调导频信息的至少一个字段；第一设备通过该字段指示第二设备使用该调制编码及解调导频信息反馈该指定消息；从而保证指定消息的及时、成功地反馈。
根据第五方面，在所述第五方面的第四种可能的实现方式中，上述第一格式还包括：指示第二设备反馈指定消息的周期的至少一个字段。
基于上述技术方案，第一格式包括指示第二设备反馈指定消息的周期的至少一个字段，第一设备通过该字段指示第二设备按照该周期反馈指定消息，从而可以保障***的有效运转。
根据第五方面，在所述第五方面的第五种可能的实现方式中，上述第三格式还包括：第一控制信息和第二控制信息的源标识的所有比特，及第一控制信息和第二控制信息的目的地标识的所有比特。
基于上述技术方案，第三格式包括：第一控制信息和第二控制信息的源标识的所有比特，及第一控制信息和第二控制信息的目的地标识的所有比特。第一设备通过该字段可以清楚的指示第一控制信息和第二控制信息的源标识及目的地标识，从而保证第一设备所期望的对象及时、成功地反馈指定消息。
根据第五方面，在所述第五方面的第六种可能的实现方式中，上述时频资源满足第二设备针对指定消息的时间处理能力。
基于上述技术方案，考虑到第二设备针对指定消息的时间处理能力，第一设备为第二设 备预留的时频资源满足第二设备针对指定消息的时间处理能力，从而可以保证第二设备有时间处理指定消息，并将处理后的指定消息及时、成功地反馈，保障***的有效运转。
根据第五方面或者第五方面的上述多种可能的实现方式中，在所述第一方面的第七种可能的实现方式中，上述第一控制信息或第二控制信息包括：侧行链路控制信息，上述数据信道包括：侧行链路物理共享信道。
基于上述技术方案，第一控制信息或第二控制信息可以为侧行链路控制信息，数据信道可以为侧行链路物理共享信道，即第一设备与第二设备通过侧行链路通信，第一设备通过为指定消息预留时频资源，从而保证指定消息的及时、成功地反馈，提升SL-U通信***性能。
第六方面，本申请的实施例提供了一种通信装置，该装置包括：第一模块，该第一模块用于：第二设备接收第一设备发送的第一控制信息和第二控制信息；第一控制信息包含第一字段或第二字段中的至少一个，第一字段或第二字段中的至少一个指示第一控制信息的格式，第一字段或第二字段中的至少一个指示第二控制信息的格式；第一控制信息的格式至少包括第一格式和第二格式，第一格式指示第二设备反馈指定消息的时频资源，第二格式指示第一设备发送数据信道的传输信息；第二控制信息的格式至少包括第三格式和第四格式，第三格式指示第二设备反馈指定消息的冗余版本，第四格式指示第一设备发送数据信道的冗余版本；第二模块，该第二模块用于：在第一控制信息为第一格式，第二控制信息为第三格式时，第二设备在时频资源上向第一设备反馈指定消息。
基于上述技术方案，第二设备接收第一设备发送的第一控制信息和第二控制信息，其中，该第一控制信息包含第一字段或第二字段中的至少一个，该第一字段或第二字段中的至少一个指示该第一控制信息的格式，该第一字段或第二字段中的至少一个指示该第二控制信息的格式；第一控制信息的第一格式指示第二设备反馈指定消息的时频资源，第二控制信息的第三格式指示第二设备反馈指定消息的冗余版本，在第一控制信息为第一格式，且第二控制信息为第三类格式时，第二设备在该时频资源上向第一设备反馈该指定消息；这样，第二设备在预留的时频资源上反馈该指定消息，从而保证指定消息的及时、成功地反馈，提升***性能，同时，第二设备在发送该指定消息时，无需通过信道竞争选择时频资源，也无需发送控制信息，节省了第二设备的功耗。
根据第六方面，在所述第六方面的第一种可能的实现方式中，上述第一格式还包括：指示上述时频资源的至少一个字段。
基于上述技术方案，第一格式包括指示指定消息的时频资源的至少一个字段，第二设备通过该字段确定为指定消息预留的时频资源，并在该时频资源上反馈该指定消息，从而保证该指定消息及时、成功地反馈。
根据第六方面，在所述第六方面的第二种可能的实现方式中，上述第三格式还包括：指示指定消息的至少一个字段，其中，指定消息包括：信道状态信息、辅助资源选择信息、定位信息、功率控制辅助信息中的至少一项。
基于上述技术方案，第一格式包括指示指定消息的至少一个字段，第二设备通过该字段确定需要反馈的指定消息内容，从而保证信道状态信息、辅助资源选择信息、定位信息、功率控制辅助信息等指定消息可以有效及时地反馈，提升***性能。
根据第六方面，在所述第六方面的第三种可能的实现方式中，上述第一格式还包括：指示第二设备反馈指定消息时使用的调制编码及解调导频信息的至少一个字段。
基于上述技术方案，第一格式包括指示第二设备反馈上述指定消息时使用的调制编码及解调导频信息的至少一个字段；第二设备通过该字段确定发送指定消息时所使用的调制编码及解调导频信息，并通过该调制编码及解调导频信息反馈该指定消息；从而保证指定消息的及时、成功地反馈。
根据第六方面，在所述第六方面的第四种可能的实现方式中，上述第一格式还包括：指示第二设备反馈指定消息的周期的至少一个字段。
基于上述技术方案，第一格式包括指示第二设备反馈指定消息的周期的至少一个字段，第二设备通过该字段确定该反馈该指定消息的周期，并按照该周期及时反馈该指定消息，从而可以保障***的有效运转。
根据第六方面，在所述第六方面的第五种可能的实现方式中，上述第三格式还包括：第一控制信息和第二控制信息的源标识的所有比特，及第一控制信息和第二控制信息的目的地标识的所有比特。
基于上述技术方案，第三格式包括：第一控制信息和第二控制信息的源标识的所有比特，及第一控制信息和第二控制信息的目的地标识的所有比特。第二设备通过该字段可以确定第一控制信息和第二控制信息的源标识及目的地标识，从而确定第二设备为第一设备所期望的对象，并及时、成功地反馈指定消息。
根据第六方面的第五种可能的实现方式，在所述第六方面的第六种可能的实现方式中，上述第二模块还用于：在目的地标识与第二设备的自身标识不同时，第二设备不使用上述时频资源。
基于上述技术方案，第二设备通过该字段可以确定第一控制信息和第二控制信息的源标识及目的地标识，在目的地标识与第二设备的自身标识不同时，第二设备不使用该时频资源，从而可以在预留的时频资源上进行避让，保证指定消息在该时频资源上及时、成功地反馈。
根据第六方面，在所述第六方面的第七种可能的实现方式中，上述时频资源满足所述第二设备针对指定消息的时间处理能力。
基于上述技术方案，考虑到第二设备针对指定消息的时间处理能力，预留的时频资源满足第二设备针对指定消息的时间处理能力，从而可以保证第二设备有时间处理指定消息，并将处理后的指定消息及时、成功地反馈，保障***的有效运转。
第七方面，本申请的实施例提供了一种通信装置，该装置包括：第一模块，该第一模块用于：第一设备向第二设备发送第一控制信息、第二控制信息及数据信道；第一控制信息指示第一设备发送数据信道的传输信息；第一控制信息包括指示第二控制信息的格式的至少一个字段；第二控制信息的格式至少包括第一格式和第二格式，第一格式指示第二设备反馈指定消息的时频资源，第二格式指示第一设备发送所述数据信道的冗余版本；第二模块，该第二模块用于：在第二控制信息为第一格式时，第一设备接收第二设备发送的指定消息、指示第二设备发送指定消息的传输信息的控制信息、及指示第二设备发送指定消息的冗余版本的控制信息；其中，指定消息占用部分或全部该时频资源。
基于上述技术方案，第一设备向第二设备发送第一控制信息、第二控制信息及数据信道；；第一控制信息指示第一设备发送数据信道的传输信息；第一控制信息包括指示第二控制信息的格式的至少一个字段；第一设备通过第二控制信息的第一格式指示第二设备反馈指定消息的时频资源；并接收第二设备发送的该指定消息、指示第二设备发送该指定消息的传输信息 的控制信息、及指示第二设备发送该指定消息的冗余版本的控制信息，第六控制信息用于指示第二设备发送该指定消息的冗余版本，且指定消息占用部分或全部该时频资源；这样，第一设备通过为指定消息预留时频资源，从而保证指定消息的及时、成功地反馈，提升***性能。
根据第七方面，在所述第七方面的第一种可能的实现方式中，上述第一格式还包括：指示上述时频资源的至少一个字段。
基于上述技术方案，第一格式包括指示指定消息的时频资源的至少一个字段，第一设备通过该字段为第二设备反馈指定消息预留时频资源，保证该指定消息可以在该时频资源的部分或全部上及时、成功地反馈。
根据第七方面，在所述第七方面的第二种可能的实现方式中，上述第一格式还包括：指示指定消息的至少一个字段，其中，指定消息包括：信道状态信息、辅助资源选择信息、定位信息、功率控制辅助信息中的至少一项。
基于上述技术方案，第一格式包括指示指定消息的至少一个字段，第一设备通过该字段指示第二设备需要反馈的指定消息内容，从而保证信道状态信息、辅助资源选择信息、定位信息、功率控制辅助信息等指定消息可以有效及时地反馈，提升***性能。
根据第七方面，在所述第七方面的第三种可能的实现方式中，上述第一格式还包括：指示第二设备反馈指定消息的周期的至少一个字段。
基于上述技术方案，第一格式包括指示第二设备反馈指定消息的周期的至少一个字段，第一设备通过该字段指示第二设备按照该周期反馈指定消息，从而可以保障***的有效运转。
根据第七方面，在所述第七方面的第四种可能的实现方式中，上述时频资源满足第二设备针对指定消息的时间处理能力。
基于上述技术方案，考虑到第二设备针对指定消息的时间处理能力，第一设备为第二设备预留的时频资源满足第二设备针对指定消息的时间处理能力，从而可以保证第二设备有时间处理指定消息，并将处理后的指定消息及时、成功地反馈，保障***的有效运转。
根据第七方面，在所述第七方面的第五种可能的实现方式中，上述第一控制信息或第二控制信息包括：侧行链路控制信息，数据信道包括：侧行链路物理共享信道。
基于上述技术方案，第一控制信息或第二控制信息可以为侧行链路控制信息，数据信道可以为侧行链路物理共享信道，即第一设备与第二设备通过侧行链路通信，第一设备通过为指定消息预留时频资源，从而保证指定消息的及时、成功地反馈，提升SL-U通信***性能。
第八方面，本申请的实施例提供了一种通信装置，该装置包括：第一模块，该第一模块用于：第二设备接收第一设备发送的第一控制信息、第二控制信息及数据信道；第一控制信息指示第一设备发送数据信道的传输信息；第一控制信息包括指示第二控制信息的格式的至少一个字段；第二控制信息的格式至少包括第一格式和第二格式，第一格式指示第二设备反馈指定消息的时频资源，第二格式指示第一设备发送数据信道的冗余版本；第二模块，该第二模块用于：在第二控制信息为第一格式时，第二设备向第一设备发送指定消息、指示第二设备发送指定消息的传输信息的控制信息、及指示第二设备发送指定消息的冗余版本的控制信息；其中，指定消息占用部分或全部该时频资源。
基于上述技术方案，第二设备接收第一设备发送的第一控制信息、第二控制信息及数据信道；第一控制信息指示第一设备发送数据信道的传输信息；第一控制信息包括指示第二控 制信息的格式的至少一个字段；第二控制信息的第一格式用于指示第二设备反馈指定消息的时频资源；在该第二控制信息为第一格式时，第二设备向所第一设备发送该指定消息、指示第二设备发送指定消息的传输信息的控制信息、及指示第二设备发送指定消息的冗余版本的控制信息，且该指定消息占用部分或全部该时频资源；这样，第二设备在部分或全部预留的时频资源上反馈该指定消息，从而保证指定消息的及时、成功地反馈，提升***性能；同时，第二设备在发送该指定消息时，无需通过信道竞争选择时频资源，节省了第二设备的功耗。
根据第八方面，在所述第八方面的第一种可能的实现方式中，上述第一格式还包括：指示上述时频资源的至少一个字段。
基于上述技术方案，第一格式包括指示指定消息的时频资源的至少一个字段，第二设备通过该字段确定为指定消息预留的时频资源，并在该时频资源上反馈该指定消息，从而保证该指定消息及时、成功地反馈。
根据第八方面，在所述第八方面的第二种可能的实现方式中，上述第一格式还包括：指示指定消息的至少一个字段，其中，指定消息包括：信道状态信息、辅助资源选择信息、定位信息、功率控制辅助信息中的至少一项。
基于上述技术方案，第一格式包括指示指定消息的至少一个字段，第二设备通过该字段确定需要反馈的指定消息内容，从而保证信道状态信息、辅助资源选择信息、定位信息、功率控制辅助信息等指定消息可以有效及时地反馈，提升***性能。
根据第八方面，在所述第八方面的第三种可能的实现方式中，上述第一格式还包括：指示第二设备反馈指定消息的周期的至少一个字段。
基于上述技术方案，第一格式包括指示第二设备反馈指定消息的周期的至少一个字段，第二设备通过该字段确定该反馈该指定消息的周期，并按照该周期及时反馈该指定消息，从而可以保障***的有效运转。
根据第八方面，在所述第八方面的第四种可能的实现方式中，上述时频资源满足第二设备针对指定消息的时间处理能力。
基于上述技术方案，考虑到第二设备针对指定消息的时间处理能力，预留的时频资源满足第二设备针对指定消息的时间处理能力，从而可以保证第二设备有时间处理指定消息，并将处理后的指定消息及时、成功地反馈，保障***的有效运转。
第九方面，本申请的实施例提供了一种通信装置，包括：处理器；用于存储处理器可执行指令的存储器；其中，所述处理器被配置为执行所述指令时实现上述第一方面或者第一方面的多种可能的实现方式中的一种或几种的通信方法，或者实现上述第二方面或者第二方面的多种可能的实现方式中的一种或几种的通信方法，或者实现上述第三方面或者第三方面的多种可能的实现方式中的一种或几种的通信方法，或者实现上述第四方面或者第四方面的多种可能的实现方式中的一种或几种的通信方法。
基于上述技术方案，第一设备通过为指定消息预留时频资源，从而保证第二设备及时、成功地反馈指定消息，提升***性能。
第十方面，本申请的实施例提供了一种非易失性计算机可读存储介质，其上存储有计算机程序指令，所述计算机程序指令被处理器执行时实现上述第一方面或者第一方面的多种可能的实现方式中的一种或几种的通信方法，或者实现上述第二方面或者第二方面的多种可能的实现方式中的一种或几种的通信方法，或者实现上述第三方面或者第三方面的多种可能的 实现方式中的一种或几种的通信方法，或者实现上述第四方面或者第四方面的多种可能的实现方式中的一种或几种的通信方法。
基于上述技术方案，第一设备通过为指定消息预留时频资源，从而保证第二设备及时、成功地反馈指定消息，提升***性能。
第十方面，本申请的实施例提供了一种芯片，包括处理器，当所述处理器执行指令时，所述处理器执行上述第一方面或者第一方面的多种可能的实现方式中的一种或几种的通信方法，或者执行上述第二方面或者第二方面的多种可能的实现方式中的一种或几种的通信方法，或者执行上述第三方面或者第三方面的多种可能的实现方式中的一种或几种的通信方法，或者执行上述第四方面或者第四方面的多种可能的实现方式中的一种或几种的通信方法。
基于上述技术方案，第一设备通过为指定消息预留时频资源，从而保证第二设备及时、成功地反馈指定消息，提升***性能。
第十一方面，本申请的实施例提供了一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行上述第一方面或者第一方面的多种可能的实现方式中的一种或几种的通信方法，或者执行上述第二方面或者第二方面的多种可能的实现方式中的一种或几种的通信方法，或者执行上述第三方面或者第三方面的多种可能的实现方式中的一种或几种的通信方法，或者执行上述第四方面或者第四方面的多种可能的实现方式中的一种或几种的通信方法。
基于上述技术方案，第一设备通过为指定消息预留时频资源，从而保证第二设备及时、成功地反馈指定消息，提升***性能。
本申请的这些和其他方面在以下(多个)实施例的描述中会更加简明易懂。
附图说明
包含在说明书中并且构成说明书的一部分的附图与说明书一起示出了本申请的示例性实施例、特征和方面，并且用于解释本申请的原理。
图1示出了根据本申请一实施例的full LBT机制示意图。
图2示出了根据本申请一实施例的信道竞争失败导致数据延迟传输的示意图。
图3示出根据本申请一实施例的一种通信***的结构示意图。
图4示出根据本申请一实施例的另一种通信***的结构示意图。
图5示出根据本申请一实施例的一种通信方法的流程图。
图6示出根据本申请一实施例的另一种通信方法的流程图。
图7示出根据本申请一实施例的一种通信装置的结构图。
图8示出根据本申请一实施例的一种通信装置的结构示意图。
图9示出根据本申请一实施例的一种芯片的结构示意图。
具体实施方式
以下将参考附图详细说明本申请的各种示例性实施例、特征和方面。附图中相同的附图标记表示功能相同或相似的元件。尽管在附图中示出了实施例的各种方面，但是除非特别指出，不必按比例绘制附图。
在这里专用的词“示例性”意为“用作例子、实施例或说明性”。这里作为“示例性”所 说明的任何实施例不必解释为优于或好于其它实施例。
另外，为了更好的说明本申请，在下文的具体实施方式中给出了众多的具体细节。本领域技术人员应当理解，没有某些具体细节，本申请同样可以实施。在一些实例中，对于本领域技术人员熟知的方法、手段、元件和电路未作详细描述，以便于凸显本申请的主旨。
下面对非授权频谱上的信道竞争机制进行描述。
终端在非授权频谱上发送数据时，需要进行信道竞争才能发送数据，基本过程为：终端在每一次发送之前先监听信道是否是空闲的，若信道不是空闲的，则不发送数据，等待一会再进行尝试，从而在确保是为空闲的情况下，才发送数据，从而避免打断其它终端正在进行的数据传输过程。
常见的非授权频谱上的信道竞争包括：先听后说(Listen Before Talk，LBT)和载波侦听多址接入(Carrier Sensing Multi Access，CSMA)。下面以NR-U(New Radio Unlicense)中LBT机制为例，对非授权频谱上的信道竞争流程进行示例性说明。
LBT机制可以包括：完整LBT(full LBT)、单发LBT(one shot LBT)及非LBT(no LBT)。其中，终端的full LBT过程为：
a)终端初始化退避次数计数器(Backoff countdown)，随机生成一个数N，且满足0<N<退避时间窗大小(contention window size，CWS)，其中，CWS为根据业务优先级约束的窗长。
b)终端进行空闲信道评估(clear channel assessment，CCA)检测，如果检测(sensing)当前时隙(slot)为空闲CCA时隙(idle CCA slot)，则N＝N-1，如果检测(sensing)当前时隙(slot)为繁忙CCA时隙(busy CCA slot)，则终端进行自延迟(self-defer)，停止上述计数器的计数，直到时隙为空闲CCA时隙时，计数器继续计数。
c)如果计数器的计数N＝0，则终端可以开始进行数据传输。
图1示出了根据本申请一实施例的full LBT机制示意图，如图1所示，终端进行了两次full LBT。第一次full LBT的过程中，CWS＝15，随机生成N＝7，终端在检测前2个时隙为空闲CCA时隙，检测第3个时隙为繁忙CCA时隙，此时进行自延迟，延迟时间可能为一个或多个时隙，在自延迟期间停止计数，信道空闲时，继续计数，直到连续检测到5个空闲CCA时隙，此时N＝0，则终端开始进行数据传输；第二次full LBT的过程中，CWS＝31，随机生成N＝20，终端连续检测到20个时隙为空闲CCA时隙，即N＝0，则终端开始进行数据传输。
根据上述描述，终端在占用非授权频谱发送数据之前需要进行LBT，这可能由于LBT的失败导致终端没有数据发送的机会或者数据不能够及时地发送。
对于SL-U通信***，混合自动重传请求(Hybrid Automatic Repeat Request，HARQ)反馈消息承载在侧行链路物理反馈信道(Physical Sidelink Feedback Channel，PSFCH)中，SCI承载在侧行链路物理控制信道(physical sidelink control channel，PSCCH)中，传输的数据承载在PSSCH中；发送终端(TxUE)向接收终端(RxUE)发送控制信息和数据，接收终端针对所接收的承载在PSSCH中的数据发送HARQ反馈消息，该HARQ反馈消息承载在PSFCH中，由于PSFCH与PSSCH存在一一绑定的关系，该HARQ反馈消息无需信道竞争便可直接反馈给发送终端；但信道测量信息等反馈信息承载在PSSCH中，此时接收终端需要通过信道竞争后才能确定是否能够反馈发送终端。
在SL-U中，接收终端有很多重要的反馈消息，例如：3I测量信息，即信道质量信息 (Channel Quantity Indicator，CQI)、秩信息(Rank Indicator，RI)、预编码矩阵指示信息(Precoding Matrix Indicator，PMI)；终端辅助资源选择的信息，比如：群组(Group)机制中组成员(Group Member)辅助组头进行资源选择的信息，和基于接收端辅助的资源分配模式(Mode2b)中的接收端辅助信息；定位信息；功控辅助信息等等；这些反馈信息承载在PSSCH中，需要及时反馈给发送终端或者组头(Group Header)等，来保障通信***的性能和通信***的有效运转。
图2示出了根据本申请一实施例的信道竞争失败导致数据延迟传输的示意图，如图2所示，发送终端等向接收终端发出测量、辅助机制、数据传输等相关指示信息的时刻为第1个时间单元，并期望在第7个时间单元收到接收终端相应的反馈信息，而由于接收终端信道竞争失败，导致实际反馈时刻为第15个时间单元，即实际反馈时刻相比期望反馈时刻延迟了较长时间，造成这些重要的消息无法及时地反馈，影响了SL-U通信***的传输性能和通信***的有效运转。
为了解决上述技术问题，本申请实施例提供如下技术方案，其具体内容可参见下文。
本申请实施例提供的技术方案可以应用于各种通信***，例如，采用第五代(5th generation，5G)通信技术的新空口(new radio，NR)通信***，未来演进***或者多种通信融合***等等。本申请提供的技术方案可以应用于多种应用场景，例如，机器对机器(machine to machine，M2M)、宏微通信、增强型移动互联网(enhanced mobile broadband，eMBB)、超高可靠超低时延通信(ultra-reliable&low latency communication，uRLLC)以及海量物联网通信(massive machine type communication，mMTC)、物物通信(Device to Device Communication，D2D)等场景。这些场景可以包括但不限于：终端与终端之间的通信场景，网络设备与网络设备之间的通信场景，网络设备与终端之间的通信场景等。下文中均是以应用于终端和终端之间的通信场景中(如D2D)为例进行说明的。
需要说明的是，本申请实施例描述的网络架构以及业务场景是为了更加清楚的说明本申请实施例的技术方案，并不构成对于本申请实施例提供的技术方案的限定，本领域普通技术人员可知，随着网络架构的演变和新业务场景的出现，本申请实施例提供的技术方案对于类似的技术问题，同样适用。
图3示出根据本申请一实施例的一种通信***的结构示意图，如图3所示，通信***可以包括一个或多个终端301(图3中仅示出了1个)以及一个或多个终端302(图3中仅示出了一个)；各终端均具备SL-U传输能力，即各终端之间可以通过侧行链路相互通信，且在通信时可以占用非授权频谱；示例性地：终端301与终端302可以通过侧行链路进行单播通信或者广播通信或者多播通信。其中，在一次业务通信中，发送控制信息和/或数据的终端可称为发送终端，接收该控制信息和/或数据的终端可称为接收终端。
图4示出根据本申请一实施例的另一种通信***的结构示意图，如图4所示，通信***可以包括一个或多个发送终端群(图4中仅示出了1个发送终端群401)以及一个或多个接收终端群(图4中示出了接收终端群402及接收终端群403)。其中，发送终端群401可以包括一个或多个发送终端，接收终端群402包括一个或多个接收终端。发送终端群中的至少一个终端与接收终端群中的至少一个终端具备SL-U传输能力。
示例性地，本申请实施例中所涉及到的终端可以是实现终端功能的设备或设备中的组件，比如，终端包括但不限于各种具有无线通信功能的手持设备、车载设备、可穿戴设备、计算 设备或连接到无线调制解调器的其它处理设备；还可以包括用户单元(subscriber unit)、蜂窝电话(cellular phone)、智能电话(smart phone)、无线数据卡、个人数字助理(personal digital assistant，PDA)、电脑、平板型电脑、手持设备(handheld)、膝上型电脑(laptop computer)、机器类型通信(machinetype communication,MTC)、终端(terminal)、用户设备(user equipment，UE)、移动终端、手环、智能手表、传感器等。又比如，终端可以是上述任一设备中的组件(比如，终端可以指上述任一设备中的芯片***)。本申请实施例中所涉及到的终端还可以是作为一个或多个部件或者单元而内置于车辆的车载模块、车载模组、车载部件、车载芯片或者车载单元，车辆通过内置的所述车载模块、车载模组、车载部件、车载芯片或者车载单元可以实施本申请的方法。
下面结合上述图3及图4对本申请实施例提供的通信方法进行具体阐述。
图5示出根据本申请一实施例的一种通信方法的流程图，该方法可以应用于上述图3或图4中的通信***，其中，第一设备可以为上述图3中终端301，相应的，第二设备可以为上述图3中终端302；第一设备也可以为上述图4中发送终端群401中的发送终端，相应的，第二设备可以为上述图4中接收终端群402和/或接收终端群403中的接收终端。如图5所示，该方法可以包括以下步骤：
步骤501、第一设备向第二设备发送第一控制信息和第二控制信息。
示例性地，第一设备可以通过组播、单播或广播方式发送第一控制信息和第二控制信息。例如，第一设备可以向一个第二设备(单播场景)发送第一控制信息和第二控制信息，第一设备也可以向多个第二设备(组播场景)发送第一控制信息和第二控制信息，第一设备还可以向不限数量的第二设备(广播场景)发送第一控制信息和第二控制信息。
其中，第一控制信息可以包含第一字段或第二字段中的至少一个，该第一字段或第二字段中的至少一个指示第一控制信息的格式，该第一字段或第二字段中的至少一个指示第二控制信息的格式。
示例性地，第一控制信息可以同时包括第一字段和第二字段，通过第一字段和第二字段共同指示第一控制信息的格式及第二控制信息的格式，例如，通过第一字段指示第一控制信息的格式，通过第二字段指示第二控制信息的格式；或者，通过第一字段指示第二控制信息的格式，通过第二字段指示第一控制信息的格式。
示例性地，第一控制信息可以只包括第一字段，或者，第一控制信息可以只包括第二字段，通过第一字段(或第二字段)单独指示第一控制信息的格式及第二控制信息的格式，例如，通过第一字段指示第一控制信息的格式及第二控制信息的格式，或者，通过第二字段指示第一控制信息的格式及第二控制信息的格式。
其中，第一控制信息的格式至少包括第一格式a和第二格式a，其中，第一格式a指示第二设备反馈指定消息的时频资源，第二格式a指示第一设备发送数据信道的传输信息。可选的，第一控制信息可以为SCI。现有标准协议中，SCI的格式包括一级SCI1及二级SCI2，其中，SCI1包括SCI1-A，SCI2包括SCI2-A及SCI2-B，SCI1-A中所包含字段及各字段的释义可参见表1，SCI2-A中所包含字段及各字段的释义可参见表2。示例性地，第二格式a可以为现有的一级SCI1，例如，可以为上述标准协议中SCI1-A；第一格式a可以为一种新的一级SCI1，为了与标准协议中SCI1-A区别，本申请实施例中将该新的一级SCI1定义为SCI1-B，其中，SCI1-B可以复用SCI1-A中至少一个字段，并对所复用的每一字段所指示的信息进行 重新定义。
示例性地，指定消息可以包括：信道状态信息、辅助资源选择信息、定位信息、功率控制辅助信息等承载在PSSCH中的信息。
信道状态信息可以包括：CQI、RI、PMI等信息。
定位信息可以为第二设备的位置，例如，可以为第二设备根据第一设备发送的参考信号所确定的环回时延(Round Trip Time，RTT)，和/或，到达角度(Angle of Arrival，AOA)信息。定位信息也可以为第二设备的地理位置，其中，该第二设备的地理位置可以是指基于卫星获得的位置坐标，例如全球定位***坐标，也可以是北斗位置坐标等；该第二设备的位置还可以是基于其他的定位体制或定位技术获得的位置信息，例如基于惯性导航获得的位置信息，基于雷达获得的位置信息，基于第一设备与第二设备之间的定位信号获得的位置信息等，本申请实施例对此并不进行限定。
辅助资源选择信息可以为Group机制下组员向组头推荐的资源信息，辅助组头为群组更好地选择群组使用的资源；辅助资源选择信息也可以为Sidelink Mode2b资源选择模式下的辅助资源信息，为了更好地通信，接收终端推荐资源信息给发送终端。
功率控制辅助信息可以为分布式网络下的终端根据功控准则测量并反馈的相关信息，包括信道信息、干扰信息等。
示例性地，时频资源可以包括时域资源及频域资源，例如，频域资源可以是一个或多个资源块(resource block，RB)，也可以是一个或多个资源单元(resource element，RE)，也可以是一个或多个载波(carrier)，也可以是一个或多个带宽部分(bandwidth part，BWP)等。时域资源可以是一个或者多个子帧，可以是一个或多个时隙，也可以是一个或多个时隙上的一个或多个符号等。
示例性地，数据信道可以为PSSCH；传输信息可以包括与该数据信道传输有关的信息，如：解调参考信号(Demodulation Reference Signal，DMRS)、调制编码方案(Modulation Coding Scheme，MCS)、天线端口信息、时频资源、频域资源等信息。
其中，第二控制信息的格式至少包括第三格式和第四格式，其中，第三格式指示第二设备反馈指定消息的冗余版本(Redundancy Version，RV)；第四格式指示第一设备发送数据信道(也称数据信息)的冗余版本。可选的，第二控制信息可以为SCI；示例性地，第四格式可以为现有的二级SCI2，例如，可以为标准协议二级SCI2中的SCI2-A或SCI2-B。为了方便表述，本申请实施例中以第四格式为标准协议中SCI2-A进行示例性说明；第三格式可以为一种新的二级SCI2，为了与标准协议中SCI2-A及SCI2-B区别，本申请实施例中将该新的二级SCI2定义为SCI2-C；其中，SCI2-C可以复用SCI2-A中至少一个字段，并对所复用的每一字段所指示的信息进行重新定义。
示例性地，SCI 2-C复用SCI2-A中的Redundancy version字段，在SCI2-C中的Redundancy version字段指示第二设备反馈指定消息的冗余版本；这样，SCI2-C复用SCI2-A中的Redundancy version字段；不会额外增加PSCCH信令开销，保证***传输性能。
下面对指示第一控制信息的格式及第二控制信息的格式的方式进行示例性说明：
方式一，在第一控制信息同时包括第一字段和第二字段时，通过第一字段的不同取值可以指示第一控制信息的格式，通过第二字段的不同取值可以指示第二控制信息的格式；示例性地，可以通过第一字段中的1比特(bit)或2比特表示第一控制信息的格式，例如，该1 比特值为0时指示第一控制信息的格式为第一格式a，该1比特值为1时指示第一控制信息的格式为第二格式a；或者，该1比特值为1时指示第一控制信息的格式为第一格式a，该1比特值为0时指示第一控制信息的格式为第二格式a；或者，该2比特值为00时指示第一控制信息为第二格式a，该2比特值为11(或10或01)时指示第一控制信息为第一格式a。再例如，可以通过第二字段中的1比特或2比特表示第二控制信息的格式，例如，该1比特值为0时指示第二控制信息的格式为第三格式，该1比特值为1时指示第二控制信息的格式为第四格式；或者，该1比特值为1时指示第二控制信息的格式为第三格式，该1比特值为0时指示第二控制信息的格式为第四格式；或者，该2比特值为00(或01)时指示第二控制信息为第四格式，该2比特值为10(或11)时指示第二控制信息为第三格式。作为一个示例，第一字段可以为SCI1-A和SCI1-B中的字段Reserved(保留比特位)，利用该字段Reserved中的1比特或者2比特指示第一控制信息的格式，例如，该2比特值为00时指示第一控制信息为SCI1-A，该2比特值为11时指示第一控制信息为SCI1-B；或者，该1比特值为0时指示第一控制信息为SCI1-A，该1比特值为1时指示第一控制信息为SCI1-B；或者，该1比特值为1时指示第一控制信息为SCI1-A，该1比特值为0时指示第一控制信息为SCI1-B。第二字段可以为SCI1-A和SCI1-B中的字段2nd-stage SCI format(二级SCI格式)，利用该字段2nd-stage SCI format中的1比特或者2比特指示第二控制信息的格式，例如，该2比特值为00时指示第二控制信息为SCI2-A，该2比特值为11时指示第二控制信息为SCI2-C；或者，该1比特值为0时指示第二控制信息为SCI2-A，该1比特值为1时指示第二控制信息为SCI2-C。
该方式中，通过对标准协议中SCI格式中的Reserved字段及2nd-stage SCI format字段进行修改，使得Reserved中的1比特或者2比特指示第一控制信息的格式，2nd-stage SCI format中的1比特或者2比特指示第二控制信息的格式，这样，通过复用标准协议中SCI格式的字段，不会额外增加PSCCH信令开销，保证***传输性能。
方式二，在第一控制信息只包括第一字段(或第一控制信息只包括第二字段)时，可以通过第一字段(或第二字段)的不同取值指示第一控制信息的格式及第二控制信息的格式，例如，第一字段(或第二字段)中的2比特表示第一控制信息的格式及第二控制信息的格式，该2比特值为00时指示第一控制信息的格式为第一格式a，第二控制信息的格式为第三格式；该2比特值为01时指示第一控制信息的格式为第一格式a，第二控制信息的格式为第四格式；该2比特值为10时指示第一控制信息的格式为第二格式a，第二控制信息的格式为第三格式；该2比特值为11时指示第一控制信息的格式为第二格式a，第二控制信息的格式为第四格式。
再例如，第一字段(或第二字段)中的1比特表示第一控制信息的格式及第二控制信息的格式，该1比特的值为0指示第一控制信息的格式为第一格式a，且第二控制信息的格式为第三格式；该1比特的值为1指示第一控制信息的格式为第二格式a，且第二控制信息的格式为第四格式；或者，该1比特的值为1指示第一控制信息的格式为第一格式a，且第二控制信息的格式为第三格式；该1比特的值为0指示第一控制信息的格式为第二格式a，且第二控制信息的格式为第四格式。
作为一个示例，第一字段可以为SCI1-A和SCI1-B中的字段Reserved(或2nd-stage SCI format字段)，利用该字段Reserved(或2nd-stage SCI format)中的2比特指示第一控制信息的格式及第二控制信息的格式，例如，该2比特值为11时指示第一控制信息为SCI1-B， 第二控制信息为SCI2-C；该2比特值为01时指示第一控制信息的格式为SCI1-B，第二控制信息的格式为SCI2-A；该2比特值为10时指示第一控制信息的格式为SCI1-A，第二控制信息的格式为SCI2-C；该2比特值为00时指示第一控制信息的格式为SCI1-A，第二控制信息的格式为SCI2-A。
作为一个示例，第一字段可以为SCI1-A和SCI1-B中的字段Reserved(或2nd-stage SCI format字段)，利用该字段Reserved(或2nd-stage SCI format)中的1比特指示第一控制信息的格式及第二控制信息的格式，例如，该1比特值为0时指示第一控制信息为SCI1-B，第二控制信息为SCI2-C，该1比特值为1时指示第一控制信息的格式为SCI1-A，第二控制信息的格式为SCI2-A；或者，该1比特值为1时指示第一控制信息为SCI1-B，第二控制信息为SCI2-C，该1比特值为0时指示第一控制信息的格式为SCI1-A，第二控制信息的格式为SCI2-A。
该方式中，对标准协议中SCI格式中的Reserved字段(或2nd-stage SCI format字段)进行修改，使得Reserved(或2nd-stage SCI format)中的2比特或1比特指示第一控制信息的格式及第二控制信息的格式，这样，仅复用标准协议中SCI格式的一个字段，不会额外增加PSCCH信令开销，保证***传输性能。
下面对第一控制信息或第二控制信息中可以包含的其他字段进行介绍：
在一种可能的实现方式中，第一格式a还可以包括：指示该时频资源的至少一个字段。这样，第一设备通过该至少一个字段为第二设备反馈指定消息预留时频资源，保证该指定消息可以在该时频资源上及时、成功地反馈。
需要说明的是，预留的时域资源无需长时间持续占用一段时间，只是预留了少部分时频图样，满足反馈指定消息即可，从而在尽可能小的开销下达到性能最优。
示例性地，第一格式a中的两个字段指示为指定消息预留的时频资源，这两个字段中一个字段可以指示指定消息预留的时域资源、一个字段可以指示预留的频域资源；或者，第一格式a中的一个字段用于指示为指定消息预留的时频资源，这一个字段可以同时指示指定消息预留的时域资源及预留的频域资源。可以理解的是，第一格式a中的三个或更多字段可以指示时频资源，本申请实施例对指示时频资源的字段数量不进行限定。
作为一个示例，SCI1-B复用SCI1-A中的Frequency resource assignment(频域资源分配)字段和Time resource assignment(时域资源分配)字段，SCI1-B中的Frequency resource assignment字段和Time resource assignment字段用于指示为指定消息预留的时频资源，其中，Frequency resource assignment字段用于指示预留的频域资源，Time resource assignment字段用于指示预留的时域资源。这样，通过复用SCI1-A中的Frequency resource assignment字段和Time resource assignment字段，不会额外增加PSCCH信令开销，保证***传输性能。
在一种可能的实现方式中，考虑到第二设备针对指定消息的时间处理能力，第一设备为第二设备预留的时频资源满足第二设备针对指定消息的processing time capability(时间处理能力)，从而可以保证第二设备有时间处理指定消息，并将处理后的指定消息及时、成功地反馈，保障***的有效运转。例如，若指定消息为信道状态信息，第二设备需要占用一定时间对信道状态进行测量，从而生成信道状态信息，将预留的时频资源位置设置在第二设备完成信道状态测量之后，预留的时域资源位置可以满足第二设备针对CSI processing time capability(信道状态信息的时间处理能力)；再例如，若指定消息为功率控制辅助信息，第 二设备需要占用一定时间对功率等进行测量，从而生成率控制辅助信息，将预留的时频资源位置设置在第二设备完成功率等测量之后，预留的时域资源位置可以满足第二设备针对相应辅助信息的processing time capability(辅助信息的时间处理能力)。
在一种可能的实现方式中，第三格式还包括：指示指定消息的至少一个字段。这样，第一设备通过该至少一个字段指示第二设备需要反馈的指定消息类型，从而保证信道状态信息、辅助资源选择信息、定位信息、功率控制辅助信息等指定消息可以有效及时地反馈，提升***性能。
示例性地，第三格式中的一个字段指示指定消息，该字段可以包括2个比特，该字段的不同取值指示指定消息不同的类型，例如，该2比特值为00时指示指定消息的类型为信道状态信息；该2比特值为01时指示指定消息的类型为辅助资源选择信息；该2比特值为10时指示指定消息的类型为定位信息；该2比特值为11时指示指定消息的类型为功率控制辅助信息。需要说明的是，第一格式a中用于指示指定消息的字段数量以及各字段所包含的比特个数可以根据指定消息的类型确定；例如，若指定消息包含四种类型，第一格式a可以通过包含2个比特或包含更多比特的一个字段指示指定消息；第一格式a也可以通过共包含2个比特或共包含更多比特的两个字段共同指示指定消息，本申请实施例对此不作限定。
作为一个示例，SCI2-C复用SCI2-A中的CSI request(信道状态信息请求)字段，在SCI2-A中的CSI request字段占用1bit，在SCI2-C中CSI request字段由原来的1bit，扩展至X bits，其中，X为正整数；该X比特的不同取值用于指示指定消息不同的类型；可选的，若指定消息包含四种类型，则X可以为2。这样，通过复用SCI2-A中的CSI request字段，保证***传输性能。
在一种可能的实现方式中，第一格式a还包括：指示第二设备反馈上述指定消息时使用的调制编码及解调导频信息的至少一个字段。这样，第一设备通过该至少一个字段指示第二设备使用该调制编码及解调导频信息反馈该指定消息，从而保证指定消息的及时、成功地反馈。
示例性地，调制编码及解调导频信息可以包括：调制和编码方案、导频图案、导频端口数量、调制和编码方案表格指示等。第一格式a中的多个字段指示第二设备反馈上述指定消息时使用的调制编码及解调导频信息。例如，可以通过四个字段指示第二设备反馈上述指定消息时使用的调制编码及解调导频信息；其中，一个字段指示第二设备反馈上述指定消息时使用的调制和编码方案，一个字段指示第二设备反馈上述指定消息时使用的导频图案，一个字段指示第二设备反馈上述指定消息时使用的调制和编码方案表格，一个字段指示第二设备反馈上述指定消息时使用的导频端口数量。
作为一个示例，SCI1-B复用SCI1-A中的Modulation and coding scheme(调制和编码方案)字段、Additional MCS table indicator(附加调制和编码方案表格)字段、DMRS pattern(解调参考信号图案)字段、Number of DMRS port(解调参考信号端口数量)字段，SCI1-B中的这四个字段中，Modulation and coding scheme字段指示第二设备反馈上述指定消息时使用的调制和编码方案；Additional MCS table indicator字段指示第二设备反馈上述指定消息时使用的调制和编码方案表格；DMRS pattern字段指示第二设备反馈上述指定消息时使用的导频图案；Number of DMRS port字段指示第二设备反馈上述指定消息时的端口信息。这样，SCI1-B通过复用SCI1-A中的字段，不会额外增加PSCCH信令开销，保证***传输性 能。
在一种可能的实现方式中，第一格式a还包括：指示第二设备反馈指定消息的周期的至少一个字段。这样，在第一设备期望第二设备周期性地反馈指定消息时，第一设备可以通过该至少一个字段指示第二设备按照该周期反馈指定消息，从而可以保障***的有效运转。
示例性地，可以通过第一格式a中的一个字段指示第二设备反馈指定消息的周期，例如，若指定消息为信道状态信息，第一设备期望第二设备每隔5ms就反馈一次信道状态信息；可以通过第一格式a中的这一个字段指示第二设备反馈信道状态信息的周期为5ms。可以理解的是，第一格式a中更多字段可以指示第二设备反馈指定消息的周期，本申请实施例对第二设备反馈指定消息的周期的字段数量不进行限定。
作为一个示例，SCI1-B复用SCI1-A中的Resource reservation period(预留资源的周期)字段，在SCI1-B中Resource reservation period字段指示第二设备反馈指定消息的周期。这样，通过复用SCI1-A中的Resource reservation period字段，不会额外增加PSCCH信令开销，保证***传输性能。
在一种可能的实现方式中，第三格式还包括：第一控制信息和第二控制信息的源标识的所有比特，及第一控制信息和第二控制信息的目的地标识的所有比特。考虑到第一设备向第二设备可以只发送第一控制信息和第二控制信息，未发送关联的数据信道，此时存在物理层L1的源标识和目的地标识，但是缺少数据链路层L2的源标识和目的地标识；这样，第一设备通过第三格式中源标识的所有比特和目的地标识的所有比特可以清楚的指示第一控制信息和第二控制信息的源标识及目的地标识，从而保证第一设备所期望的对象及时、成功地反馈指定消息。
示例性地，在第三格式中的两个字段中包含第一控制信息和第二控制信息的源标识的所有比特，及第一控制信息和第二控制信息的目的地标识的所有比特；其中，一个字段包含第一控制信息和第二控制信息的源标识的所有比特，另一个字段包含第一控制信息和第二控制信息的目的地标识的所有比特。可以理解的是，第三格式中可以一个字段或者更多字段包含第一控制信息和第二控制信息的源标识的所有比特，及第一控制信息和第二控制信息的目的地标识的所有比特，本申请实施例对此不进行限定。
作为一个示例，SCI2-C复用SCI2-A中的Source ID(源身份标识)字段和Destination ID(目的地身份标识)字段，在SCI2-A中的Source ID字段只包含物理层L1的源标识，在SCI2-C中Source ID字段中补齐物理层L1和数据链路层L2的源标识；在SCI2-A中的Destination ID字段只包含物理层L1的目的地标识，在SCI2-C中Destination ID字段中补齐物理层L1和数据链路层L2的目的地标识。这样，尽可能复用SCI2-A中的Source ID字段和Destination ID字段，以保证***传输性能。
作为一个示例，SCI2-C复用SCI2-A中的New data indicator(新传数据指示，NDI)字段、Redundancy version(冗余版本)字段、HARQ feedback enabled/disabled indicator(混合自动重传请求处理反馈使能/不使能指示)字段、Source ID字段及Destination ID字段。第一设备与第二设备预先约定，在第二控制信息为SCI2-C时对应的NDI、冗余版本和HARQ反馈使能/不使能指示按照预先约定的处理，从而使得NDI、冗余版本和HARQ反馈使能/不使能指示存在空闲比特。这样，在SCI2-C中Source ID字段指示物理层L1的源标识，Destination ID字段指示物理层L1的目的地标识，NDI、冗余版本和HARQ反馈使能/不使能 指示字段空闲出来的比特可以用来指示SCI1-B和SCI2-C的数据链路层L2的源标识，及SCI1-B和SCI2-C的数据链路层L2的目的地标识，若上述空闲出来的比特不足，则可进一步通过增加比特的方式补齐。例如，可以在SCI2-C中New data indicator及HARQ feedback enabled/disabled indicator字段中的空闲比特补齐SCI1-B和SCI2-C的数据链路层L2的源标识的所有比特，在Redundancy version字段中的空闲比特补齐SCI1-B和SCI2-C的数据链路层L2的目的地标识的所有比特，再例如，可以在SCI2-C中New data indicator及HARQ feedback enabled/disabled indicator字段中的空闲比特补齐SCI1-B和SCI2-C的数据链路层L2的目的地的所有比特，Redundancy version字段中的空闲比特补齐SCI1-B和SCI2-C的数据链路层L2的源标识的所有比特；若上述空闲比特不足，则可进一步通过增加比特的方式补齐。这样，通过复用SCI2-A中的New data indicator字段、HARQ feedback enabled/disabled indicator字段、Redundancy version字段、Source ID字段及Destination ID字段，从而保证***传输性能。
需要说明的是，除上述作为示例性地说明的字段之外，第一控制信息和第二控制信息中还可以包括其他字段，本申请实施例对此不作限定。
举例来说，以第一格式a为SCI1-B，第二格式a为SCI1-A为例，SCI1-B复用SCI1-A中字段，表1为SCI1-B与SCI1-A中相同字段的释义对比表。如表1所示，SCI1-A为现有标准协议SCI格式，其中，Reserved字段中的保留2比特值默认为00，表明该SCI1为SCI1-A；SCI1-A中字段及各字段对应的释义与标准协议中SCI1-A中字段及各字段对应的释义相同。SCI1-B包含与SCI1-A相同的字段，但相同字段的释义存在区别。
表1：SCI1-A与SCI1-B字段释义对比表
Figure PCTCN2021132483-appb-000001
Figure PCTCN2021132483-appb-000002
如表1所示，Priority(优先级)字段，在SCI1-A中指示第一设备当次传输所占用的时频资源的优先级及未来预留的时频资源的优先级，在SCI1-B中指示第一设备为第二设备预留的时频资源的优先级。Frequency resource assignment字段，在SCI1-A中指示第一设备当次传输所占用的时频资源及未来预留的频域资源，在SCI1-B中指示第一设备为第二设备反馈指定消息预留的频域资源。Time resource assignment字段，在SCI1-A中指示第一设备当次传输所占用的时频资源及未来预留的时域资源，在SCI1-B中指示第一设备为第二设备反馈指定消息预留的时域资源。Resource reservation period字段，在SCI1-A中指示第一设备为未来预留的时域资源的周期，在SCI1-B中指示第一设备指示第二设备反馈指定消息的周期。DMRS pattern字段，在SCI1-A中指示第一设备传输的导频图案，在SCI1-B中指示第一设备指示第二设备反馈上述指定消息时使用的导频图案。2nd-stage SCI format字段，在SCI1-A中指示SCI1-A指示的对应的SCI2的格式，在SCI1-B中指示SCI1-B所对应的SCI2格式为SCI2-C。Beta_offset indicator(β偏移指示)字段，在SCI1-A中指示SCI2的相关参数，在SCI1-B中指示SCI2-C的相关参数。Number of DMRS port字段，在SCI1-A中指示第一设备传输的端口信息，在SCI1-B中指示第一设备指示第二设备反馈指定消息的端口信息。Modulation and coding scheme字段，在SCI1-A中指示第一设备传输的MCS，在SCI1-B中指示第一设备指示第二设备反馈指定消息时使用的MCS。Additional MCS table indicator字段，在SCI1-A中指示第一设备传输的MCS Table，在SCI1-B中指示第一设备指示第二设备反馈指定消息的MCS Table。PSFCH overhead indication(PSFCH开销指示)字段，在SCI1-A中指示第一设备传输对应的PSFCH开销信息，在SCI1-B中指示第一设备指示第二设备反馈指示消息的PSFCH开销信息。Reserved字段，在SCI1-A中为保留比特，无额外指示信息，在SCI1-B中指示格式为SCI1-B。
以第三格式为SCI2-C，第四格式为SCI2-A为例，SCI2-C复用SCI2-A中字段，表2为SCI2-C与SCI2-A中相同字段的释义对比表。如表2所示，SCI2-A为现有标准协议SCI格式，SCI2-A中字段及各字段对应的释义与标准协议中SCI2-A中字段及各字段对应的释义相同。SCI2-C包含与SCI2-A相同的字段，但相同字段的释义存在区别。
表2：SCI2-A与SCI2-C字段释义对比表
Figure PCTCN2021132483-appb-000003
Figure PCTCN2021132483-appb-000004
如表2所示，HARQ process number(混合自动重传请求处理进程号)字段，在SCI2-A中指示第一设备传输的HARQ处理进程号，在SCI2-C中指示第一设备指示第二设备反馈指定消息的HARQ进程号。Newdata indicator字段，在SCI2-A中指示第一设备传输的NDI信息，在SCI2-C中指示第一设备指示第二设备反馈指定消息的NDI信息。Redundancy version字段，在SCI2-A中指示第一设备传输的冗余版本号，在SCI2-C中的指示第一设备指示第二设备反馈指定消息的冗余版本号。Source ID字段，在SCI2-A中指示第一设备传输对应的源ID，在SCI2-C中的指示第一设备传输对应的物理层L1的源ID和数据链路层L2的源ID信息。Destination ID字段，在SCI2-A中指示第一设备传输对应的目的ID，在SCI2-C中的指示第一设备传输对应的物理层L1的目标ID和数据链路层L2的目标ID信息。HARQ feedback enabled/disabled indicator字段，在SCI2-A中指示第一设备传输关联的HARQ是否反馈的使能，在SCI2-C中的指示第一设备指示第二设备反馈指定消息是否有HARQ反馈。Cast type indicator(类型转换指示)字段，在SCI2-A中指示第一设备传输的Cast类型，在SCI2-C中第一设备传输的Cast类型。CSI request字段，在SCI2-A中指示第一设备触发第二设备反馈CSI，在SCI2-C中指示第一设备指示第二设备反馈指定消息的类型。
需要说明的是，上述表1和表2中为SCI1-B、SCI1-A、SCI2-C、SCI2-A中各字段的示例性说明，各字段的释义可参照前述相关介绍，在此不作赘述。
由上述表1和表2可知，在侧行链路中的SCI包括针对TxUE传输的时频资源等的指示信息，对RxUE反馈的时频资源等信息没有关联。本申请实施例中,通过复用标准协议SCI中格式及字段，无需新建字段，在SCI1-A及SCI2-A现有字段的基础上稍作修改，得到新定义的SCI1-B及SCI2-C，SCI1-B及SCI2-C指示RxUE反馈指定消息的预留时频资源等信息，从而保证重要消息的及时、成功的反馈，提升***性能。同时，SCI1-B及SCI2-C没有新增字段，保证***传输性能。
作为一个示例，第一设备在向第二设备发送消息时，如果需要让第二设备能够及时地、有保障地反馈指定消息，则可以为该指定消息预留时频资源，此时，第一设备可以向第二设备发送SCI1-B和SCI2-C，从而指示为第二设备反馈指定消息预留的时频资源，指定消息的类型，以及反馈指定消息的调制编码等信息。这样，第一设备通过发送侧行链路控制信息SCI1-B和SCI2-C，为指定消息预留时频资源，从而保证指定消息的及时、成功地反馈，提升SL-U通信***性能。
步骤502、第二设备接收第一设备发送的第一控制信息和第二控制信息；
其中，第一控制信息可以包含第一字段或第二字段中的至少一个，该第一字段或第二字段中的至少一个指示第一控制信息的格式，该第一字段或第二字段中的至少一个指示第二控制信息的格式。第一控制信息的格式至少包括第一格式a和第二格式a，其中，第一格式a 指示第二设备反馈指定消息的时频资源，第二格式a指示第一设备发送数据信道的传输信息。第二控制信息的格式至少包括第三格式和第四格式，其中，第三格式指示第二设备反馈指定消息的冗余版本，第四格式指示第一设备发送数据信道的冗余版本。
其中，第一字段、第二字段、第一格式a、第二格式a、第三格式、第四格式等相关表述可以参照上述步骤501，在此不作赘述。
示例性地，第二设备根据第一字段和/或第二字段确定第一控制信息的格式及第二控制信息的格式。若确定所接收的第一控制信息的格式为第一格式a，第二控制信息的格式为第三格式，例如，第二设备所接收的为第一设备发送的SCI1-B和SCI2-C，则第二设备确定第一格式a及第二格式a中字段所指示的预览时频资源、调制编码等信息，并准备在预留的时频资源上反馈第一设备所期望的指定消息。
在一种可能的实现方式中，第二设备根据第一格式a中所包括的指示时频资源的至少一个字段，确定反馈指定消息的时频资源，优选的，该时频资源满足第二设备针对指定消息的时间处理能力。例如，第二设备可以通过SCI1-B中的Frequency resource assignment字段确定反馈指定消息的频域资源，通过SCI1-B中的Time resource assignment字段确定反馈指定消息的时域资源。
在一种可能的实现方式中，第二设备根据第三格式中所包括的指示指定消息的至少一个字段，确定指定消息的类型。例如，第二设备可以通过SCI2-C中的CSI request确定指定消息的类型。
在一种可能的实现方式中，第二设备根据第一格式a中所包括的指示第二设备反馈指定消息时使用的调制编码及解调导频信息的至少一个字段，确定反馈指定消息时使用的调制编码及解调导频信息。例如，第二设备可以通过SCI1-B中的Modulation and coding scheme字段，确定反馈上述指定消息时使用的调制和编码方案；或者，通过SCI1-B中的Additional MCS table indicator字段确定反馈上述指定消息时使用的调制和编码方案表格；或者，通过SCI1-B中的DMRS pattern字段确定反馈上述指定消息时使用的导频图案；或者，通过SCI1-B中的Number of DMRS port字段确定反馈上述指定消息时的端口信息。
在一种可能的实现方式中，第二设备根据第一格式a中所包括的指示第二设备反馈指定消息的周期的至少一个字段，确定反馈指定消息的周期。例如，第二设备可以通过SCI1-B中的Resource reservation period字段确定反馈指定消息的周期。
在一种可能的实现方式中，第二设备根据第三格式中所包括的第一控制信息和第二控制信息的源标识的所有比特，及第一控制信息和第二控制信息的目的地标识的所有比特，从而确定第一控制信息和第二控制信息的源标识及目的地标识。例如，第二设备可以通过SCI2-C中Source ID字段中物理层L1和数据链路层L2的源标识确定SCI2-C的源标识，通过SCI2-C中Destination ID字段中物理层L1和数据链路层L2的目的地标识确定SCI2-C的目的地标识。
示例性地，第二设备通过第一控制信息和第二控制信息的源标识及目的地标识确定本次所传输的消息的归属，当第二设备所确定的目的地标识与第二设备的自身标识不同时，第二设备不使用上述时频资源，从而可以在预留的时频资源上进行避让，保证指定消息在该时频资源上及时、成功地反馈。可选的，第二设备可以根据时频资源的优先级确定是否在预留的时频资源上进行避让，从而保障优先级更高的数据成功传输，提高***性能。
举例来说，如上述图4所示，发送终端群401中的发送终端向所述接收终端群402和接收终端群403发送SCI1-B和SCI2-C，若接收终端群402的某一接收终端接收到SCI1-B和SCI2-C，根据SCI1-B和SCI2-C中字段确定的目的地标识与自身标识相同，则准备在预留的时频资源上反馈指定消息，若接收终端群403的接收终端接收到SCI1-B和SCI2-C，根据SCI1-B和SCI2-C中字段确定的目的地标识与自身标识不同，则在预留的时频资源上进行避让。
步骤503、在第一控制信息为第一格式a时，第二控制信息为第三格式时，第二设备在上述时频资源上向第一设备反馈指定消息。
该步骤中，在第一控制信息为第一格式a时，第二控制信息为第三格式时，第二设备可以直接在上述步骤502中所确定的预留时频资源上向第一设备反馈指定消息；保证了指定消息的及时、成功地反馈，提升了***性能的；同时，第二设备无需通过信道竞争选择时频资源，也无需发送控制信息，节省了第二设备的功耗。
示例性地，第二设备可以在上述所确定的时频资源上，按照所确定的发送指定消息时所使用的调制编码及解调导频信息，反馈所需要反馈的指定消息内容，从而保证信道状态信息、辅助资源选择信息、定位信息、功率控制辅助信息等指定消息可以有效及时地反馈，提升***性能。进一步地，第二设备还可以通过所确定的反馈该指定消息的周期，按照该周期及时反馈该指定消息，从而可以保障***的有效运转。
作为一个示例，第二设备所接收为SCI1-B和SCI2-C时，第二设备可以根据SCI1-B中的Frequency resource assignment、Time resource assignment、CSI request、Modulation and coding scheme、Number of DMRS port、Resource reservation period等字段所确定的信息，反馈指定消息。
在一种可能的实现方式中，在第一控制信息为第一格式a时，第二控制信息为第三格式时，第二设备可以反馈针对该第一控制信息和第二控制信息的HARQ，或者不反馈针对该第一控制信息和第二控制信息的HARQ。示例性的，反馈上述HARQ信息的方式包括：发送应答消息(Acknowledgement，ACK)或发送否定应答(Negative Acknowledgement，NACK)。
例如，第二设备所接收为SCI1-B和SCI2-C时，第二设备可以不反馈针对SCI1-B和SCI2-C的HARQ，也可以反馈针对SCI1-B和SCI2-C的HARQ。在第二设备反馈针对SCI1-B和SCI2-C的HARQ时，若接收失败，则在PSFCH上传输HARQ-NACK信息，其他情况下在PSFCH上不传输信息；或者，接收成功，则在PSFCH上传输HARQ-ACK信息，失败的话传输HARQ-NACK信息。
步骤504、在第一控制信息为第一格式a，第二控制信息为第三格式时，第一设备在上述时频资源上接收第二设备反馈的指定消息。
该步骤中，在第一控制信息为第一格式a时，第二控制信息为第三格式时，第一设备可以直接在该时频资源上接收第二设备反馈的该指定消息，无需盲检该指定消息所在的时频资源，也无需检测控制信息，节省了第一设备的功耗。
作为一个示例，第一设备发送SCI1-B和SCI2-C后，可以在SCI1-B中的Frequency resource assignment字段及Time resource assignment字段指定的时域资源上接收第二设备反馈的指定消息。
在一种可能的实现方式中，在第一控制信息为第一格式a时，第二控制信息为第三格式时，第一设备可以检测针对该第一控制信息和第二控制信息的HARQ，也可以不检测针对该第 一控制信息和第二控制信息的HARQ。可选的，若第二设备反馈针对该第一控制信息和第二控制信息的HARQ，则第一设备可以接收该HARQ，从而提高第一设备和第二设备之间通信的可靠性。
例如，第一设备发送SCI1-B和SCI2-C后，第一设备可以不检测针对SCI1-B和SCI2-C的HARQ；也可以检测针对SCI1-B和SCI2-C的HARQ。可选的，若第二设备反馈针对SCI1-B和SCI2-C的HARQ时，则第一设备可以接收该HARQ。
本申请实施例中，第一控制信息包含第一字段或第二字段中的至少一个，该第一字段或第二字段中的至少一个指示该第一控制信息的格式，该第一字段或第二字段中的至少一个指示该第二控制信息的格式；第一控制信息的第一格式a指示第二设备反馈指定消息的时频资源，第二控制信息的第三格式指示第二设备反馈指定消息的冗余版本，这样，通过为指定消息预留时频资源，从而保证指定消息的及时、成功地反馈，提升***性能。
图6示出根据本申请一实施例的另一种通信方法的流程图，该方法可以应用于上述图3或图4中的通信***，其中，第一设备可以为上述图3中终端301，相应的，第二设备可以为上述图3中终端302；第一设备也可以为上述图4中发送终端群401中的发送终端，相应的，第二设备可以为上述图4中接收终端群402和/或接收终端群403中的接收终端。如图6所示，该方法可以包括以下步骤：
步骤601、第一设备向第二设备发送第一控制信息、第二控制信息及数据信道；
示例性地，第一设备可以通过组播、单播或广播方式发送第一控制信息、第二控制信息及数据信道。例如，第一设备可以向一个第二设备(单播场景)发送第一控制信息、第二控制信息及数据信道，第一设备也可以向多个第二设备(组播场景)发送第一控制信息、第二控制信息及数据信道，第一设备还可以向不限数量的第二设备(广播场景)发送第一控制信息、第二控制信息及数据信道。
其中，第一控制信息指示第一设备发送数据信道的传输信息；其中，传输信息的内容可参照前文相关表述，在此不再赘述。示例性地，第一控制信息及第二控制信息为SCI，数据信道为PSSCH。可选的，第一控制信息可以为现有的一级SCI1，例如，可以为标准协议中SCI1-A；SCI1-A中所包含字段及各字段的释义可参见上述表1。
其中，第一控制信息可以包括指示第二控制信息的格式的至少一个字段；第二控制信息的格式至少包括第一格式b和第二格式b，第一格式b指示第二设备反馈指定消息的时频资源；第二格式b指示第一设备发送数据信道的冗余版本；其中，指定消息、时频资源等的内容可以参照前文相关表述，在此不再赘述。可选的，第二格式b可以为现有的二级SCI2，例如，可以为标准协议中SCI2-A或SCI2-B，为了方便表述，本申请实施例中以第二格式b为标准协议中SCI2-A进行示例性说明，SCI2-A中所包含字段及各字段的释义可参见表2；第一格式b可以为一种新的二级SCI2，为了与标准协议中SCI2-A及SCI2-B区别，本申请实施例中将该新的二级SCI2定义为SCI2-D；其中，SCI2-D包含SCI2-A中的至少一个字段，并在此基础上，新增字段承载预留的时频资源等信息。
示例性地，第一控制信息可以通过一个字段指示第二控制信息的格式，该字段的不同取值可以指示第二控制信息的格式，例如，可以通过该字段中的1比特(bit)或者2比特表示第二控制信息的格式，例如，该2比特值为11(或10)时指示第二控制信息的格式为第一格式b，该2比特值为00(或01)时指示第二控制信息的格式为第二格式b。
作为一个示例，该字段可以为SCI1-A的字段Reserved，利用该字段Reserved中的2比特指示第二控制信息的格式，例如，该2比特值为00时指示第二控制信息为SCI2-A，该2比特值为11时指示第二控制信息为SCI2-D；或者，该字段可以为SCI1-A中的字段2nd-stage SCI format，利用该字段2nd-stage SCI format中的2比特指示第二控制信息的格式，例如，该2比特值为00时指示第二控制信息为SCI2-A，该2比特值为10时指示第二控制信息为SCI2-D。
该方式中，对标准协议中SCI格式SCI1-A中的Reserved字段或2nd-stage SCI format字段进行修改，利用SCI1-A中Reserved字段中的2比特指示第二控制信息的格式，或者利用2nd-stage SCI format中的2比特指示第二控制信息的格式，这样，复用标准协议中SCI格式的字段，不会额外增加PSCCH信令开销，保证***传输性能。
下面对第二控制信息中可以包含的其他字段进行介绍：
在一种可能的实现方式中，上述第一格式b可以包括：指示上述时频资源的至少一个字段。第一设备通过该至少一个字段为第二设备反馈指定消息预留时频资源，保证该指定消息可以在该时频资源的部分或全部上及时、成功地反馈。
该实现方式中，第一格式b中不同数量的字段指示为指定消息预留的时频资源的具体内容可以参照前文第一格式a中相关表述，在此不再赘述，需要说明的是，与第一格式a复用字段不同的是，第一格式b中字段为新增字段。
作为一个示例，SCI2-D中在SCI2-A基础上，新增Frequency resource assignment字段和Time resource assignment字段，SCI2-D中的这两个字段-Frequency resource assignment字段和Time resource assignment字段用于指示为指定消息预留的时频资源，其中，Frequency resource assignment字段用于指示预留的频域资源，Time resource assignment字段用于指示预留的时域资源。
在一种可能的实现方式中，考虑到第二设备针对指定消息的时间处理能力，第一设备为第二设备预留的时频资源满足第二设备针对指定消息的时间处理能力，从而可以保证第二设备有时间处理指定消息，并将处理后的指定消息及时、成功地反馈，保障***的有效运转。该实现方式中关于时间处理能力的具体内容，可参照前文的相关表述，在此不再赘述。
在一种可能的实现方式中，上述第一格式b还可以包括：指示指定消息的至少一个字段，这样，第一设备通过该至少一个字段指示第二设备需要反馈的指定消息类型，从而保证信道状态信息、辅助资源选择信息、定位信息、功率控制辅助信息等指定消息可以有效及时地反馈，提升***性能。
该实现方式中第一格式b中不同数量的字段指示为指定消息类型的具体内容可以参照前文第一格式a中相关表述，在此不再赘述。
作为一个示例，SCI2-D复用SCI2-A中的CSI request(信道状态信息请求)字段，在SCI2-A中的CSI request字段占用1bit，在SCI2-D中CSI request字段由原来的1bit，扩展至X bits，其中，X为正整数；该X比特的不同取值用于指示指定消息不同的类型；可选的，若指定消息包含四种类型，则X可以为2。这样，通过复用SCI2-A中的CSI request字段，从而保证***传输性能。
在一种可能的实现方式中，上述第一格式b还可以包括：指示第二设备反馈指定消息的周期的至少一个字段。这样，在第一设备期望第二设备周期性地反馈指定消息时，第一设备 可以通过该至少一个字段指示第二设备按照该周期反馈指定消息，从而可以保障***的有效运转。
该实现方式中，第一格式b中指示的反馈指定消息的周期具体内容可以参照前文第一格式a中相关表述，在此不再赘述，需要说明的是，与第一格式a复用字段不同的是，第一格式b中字段为新增字段。
作为一个示例，SCI2-D在SCI2-A基础上，新增Resource reservation period字段，在SCI2-D中Resource reservation period字段指示第二设备反馈指定消息的周期。
需要说明的是，除上述作为示例性地说明的字段之外，第一控制信息和第二控制信息中还可以包括其他字段，本申请实施例对此不作限定。
举例来说，以第一控制信息为SCI1-A，第一格式b为SCI2-D，第二格式b为SCI2-A为例；其中，SCI1-A中字段的释义可参照上述表1，在此不作赘述，其中Reserved字段中保留2比特值默认为00，表明该SCI1为SCI1-A，或者，可以利用Reserved字段中的1比特指示第二控制信息的格式；SCI2-D可以包含SCI2-A中的全部字段，并在此基础上，新增若干字段，如表3所示。
表3：SCI2-A与SCI2-D字段释义对比表
Figure PCTCN2021132483-appb-000005
如表3所示，HARQ process number字段，在SCI2-A和SCI2-D中均指示第一设备传输的HARQ处理进程号。New data indicator字段，在SCI2-A和SCI2-D中均指示第一设备传输的NDI信息。Redundancy version字段，在SCI2-A和SCI2-D中均指示第一设备传输的冗余版本号。Source ID字段，在SCI2-A和SCI2-D中均指示第一设备传输对应的源ID。 Destination ID字段，在SCI2-A和SCI2-D中均指示第一设备传输对应的目的ID。HARQ feedback enabled/disabled indicator字段，在SCI2-A和SCI2-D中均指示第一设备传输关联的HARQ是否反馈的使能。Cast type indicator字段，在SCI2-A和SCI2-D中均指示第一设备传输的Cast类型。CSI request字段，在SCI2-A中指示第一设备触发第二设备反馈的CSI，在SCI2-D中指示第一设备指示第二设备反馈指定消息的类型。此外，SCI2-D中还包括：新增的Frequency resource assignment字段，指示预留的频域资源；新增的Time resource assignment字段，指示预留的时域资源；新增的Resource reservation period字段，指示第二设备反馈指定消息的周期。
由上述表3可知，在侧行链路中的SCI包括针对TxUE传输的时频资源等的指示信息，对RxUE反馈的时频资源等信息没有关联。本申请实施例中在标准协议SCI中格式及字段的基础上，新增字段承载预留的时频资源等信息，将SCI当作类似DL Grant(下行授权)和UL Grant(上行授权)综合使用，在SCI2-A现有字段的基础上稍作修改，得到新定义的SCI2-D，SCI2-D指示RxUE反馈指定消息的预留时频资源等信息，保证重要消息的及时、成功的反馈，提升***性能。同时，SCI2-D相对于现有的SCI2-A，仅对一个字段重新释义，其他字段释义不变，从而尽量少的改变现有协议中SCI2-A的字段释义，提高新定义的SCI2-D的适用性。
作为一个示例，第一设备在向第二设备发送消息时，如果需要让第二设备能够及时地、有保障的反馈指定消息，则可以为该指定消息预留时频资源，此时，第一设备可以向第二设备发送SCI1-A、SCI2-D及侧行链路物理共享信道，从而通过SCI1-A指示该侧行链路物理共享信道的传输信息，通过SCI2-D指示为第二设备反馈指定消息预留的时频资源，指定消息的类型等信息，通过SCI1-A提供调制编码等信息。这样，第一设备通过发送侧行链路控制信息SCI2-D、SCI1-A及侧行链路物理共享信道，为指定消息预留时频资源，从而保证指定消息的及时、成功地反馈，提升SL-U通信***性能。
步骤602、第二设备接收第一设备发送的第一控制信息、第二控制信息及数据信道；
其中，第一控制信息指示第一设备发送数据信道的传输信息；第一控制信息包括指示第二控制信息的格式的至少一个字段；第二控制信息的格式至少包括第一格式b和第二格式b，第一格式b指示第二设备反馈指定消息的时频资源；第二格式b指示第一设备发送数据信道的冗余版本。
其中，第一控制信息、第一格式b、第二格式b等相关表述可以参照上述步骤601，在此不作赘述。
示例性地，第二设备根据第一控制信息中指示第二控制信息格式的字段确定第二控制信息的格式；若确定所接收的第二控制信息的格式为第一格式b,例如，第二设备所接收的第二控制信息为SCI2-D；则第二设备确定第一格式b中字段所指示的预览时频资源、反馈指示消息的周期等信息，并准备在预留的时频资源上反馈第一设备所期望的指定消息。
在一种可能的实现方式中，第二设备根据上述第一格式b中所包括的指示上述时频资源的至少一个字段，确定反馈指定消息的时频资源，优选的，该时频资源满足第二设备针对指定消息的时间处理能力。例如，第二设备可以通过SCI2-D中的Frequency resource assignment字段确定反馈指定消息的频域资源，通过SCI2-D中的Time resource assignment字段确定反馈指定消息的时域资源。
在一种可能的实现方式中，第二设备还可以根据上述时频资源的信号干扰情况，将该时 频资源中干扰较弱或者无干扰的部分作为反馈指定消息的时频资源，从而保证传输性能，和/或，第二设备可以根据所要反馈的指定消息的数据量大小，将该时频资源中的一部分作为反馈指定消息的时频资源，从而节省开销。
在一种可能的实现方式中，第二设备根据上述第一格式b中所包括的指示指定消息的至少一个字段，确定指定消息的类型。例如，第二设备可以通过SCI2-D中的CSI request确定指定消息的类型。
在一种可能的实现方式中，第二设备根据上述第一格式b中所包括的指示第二设备反馈指定消息的周期的至少一个字段；确定反馈指定消息的周期。例如，第二设备可以通过SCI2-D中的Resource reservation period字段确定反馈指定消息的周期。
在一种可能的实现方式中，第二设备根据上述第一格式b中Source ID字段及Destination ID字段，以及数据信道中所包含的数据链路层L2的源标识及目的地标识，确定第一控制信息和第二控制信息的源标识及目的地标识。当第二设备所确定的目的地标识与第二设备的自身标识不同时，第二设备不使用上述时频资源，从而可以在预留的时频资源上进行避让，保证指定消息在该时频资源上及时、成功地反馈。可选的，第二设备可以根据时频资源的优先级确定是否在预留的时频资源上进行避让，从而保障优先级更高的数据成功传输，提高***性能。
举例来说，如上述图4所示，发送终端群401中的发送终端向接收终端群402和接收终端群403发送SCI1-A、SCI2-D及数据信道，若接收终端群402的某一接收终端接收到SCI1-A、SCI2-D及数据信道，根据SCI2-D中字段及数据信道确定的目的地标识与自身标识相同，则准备在预留的时频资源上反馈指定消息，若接收终端群403的接收终端接收到SCI1-A、SCI2-D及数据信道，根据SCI2-D中字段及数据信道确定的目的地标识与自身标识不同，则在预留的时频资源上进行避让。
步骤603、在第二控制信息为第一格式b时，第二设备向第一设备发送指定消息、指示第二设备发送指定消息的传输信息的控制信息、及指示第二设备发送指定消息的冗余版本的控制信息；其中，该指定消息占用部分或全部所述时频资源。
该步骤中，在第二控制信息为第一格式b时，第二设备可以直接在上述步骤602中所确定的预留时频资源上向第一设备反馈指定消息，从而保证了指定消息的及时、成功地反馈，提升了***性能。同时，第二设备无需通过信道竞争选择时频资源，从而节省了第二设备的功耗。
示例性地，第二设备可以在上述所确定的时频资源上，复用第一控制信息所指示的调制编码及解调导频信息，反馈所需要反馈的指定消息内容，从而保证信道状态信息、辅助资源选择信息、定位信息、功率控制辅助信息等指定消息可以有效及时地反馈，提升***性能。进一步地，第二设备还可以通过所确定的反馈该指定消息的周期，按照该周期及时反馈该指定消息，从而可以保障***的有效运转。
作为一个示例，第二设备所接收为SCI1-A和SCI2-D时，第二设备可以根据SCI2-D中的Frequency resource assignment、Time resource assignment、CSI request、Resource reservation period等字段所确定的信息以及SCI1-A中Modulation and coding scheme、Number of DMRS port等字段所确定的信息，反馈指定消息。
同时，第二设备还可以反馈针对第一设备发送的数据信道的HARQ。示例性的，反馈上述 HARQ信息的方式包括：ACK或NACK。
例如，第二设备所接收为SCI1-A和SCI2-D及数据信道时，第二设备可以反馈针对该数据信道的HARQ。若第二设备接收该数据信道失败，则在PSFCH上传输HARQ-NACK信息，其他情况下在PSFCH上不传输信息；或者，第二接收该数据信道成功，则在PSFCH上传输HARQ-ACK信息，接收该数据信道失败，则在PSFCH上传输HARQ-NACK信息。
步骤604、在该第二控制信息为第一格式b时，第一设备接收第二设备发送的该指定消息、指示第二设备发送该指定消息的传输信息的控制信息、及指示第二设备发送该指定消息的冗余版本的控制信息；其中，该指定消息占用部分或全部该时频资源。
该步骤中，在第二控制信息为第一格式b时，第一设备可以直接在该时频资源上接收第二设备反馈的该指定消息，从而及时获取所期望的指定消息。
第一设备发送SCI 1-A和SCI2-D后，可以在SCI2-D中的Frequency resource assignment字段及Time resource assignment字段指定的时域资源上接收第二设备反馈的指定消息。
同时，第一设备还可以接收第二设备反馈的针对数据信道的HARQ。从而提高第一设备和第二设备之间通信的可靠性。示例性的，反馈上述HARQ信息的方式包括：ACK或NACK。
例如，若第一设备接收到第二设备针对数据信道反馈的HARQ-NACK信息，则第一设备可以确定第二设备接收该数据信道失败，进行重发，若为未接收到第二设备针对数据信道反馈的HARQ信息，则第一设备可以确定第二设备接收该数据信道成功；或者，若第一设备接收到第二设备针对数据信道反馈的HARQ-ACK信息，则第一设备可以确定第二设备接收该数据信道成功，若第一设备接收到第二设备针对数据信道反馈的HARQ-NACK信息，则第一设备可以确定第二设备接收该数据信道失败，进行重发。
本申请实施例中，第一控制信息指示第一设备发送数据信道的传输信息；第一控制信息包括指示第二控制信息的格式的至少一个字段；第二控制信息的第一格式b用于指示第二设备反馈指定消息的时频资源；这样，通过为指定消息预留时频资源，从而保证指定消息的及时、成功地反馈，提升***性能。
基于与上述通信方法同样的发明构思，本申请实施例还提供了一种通信装置。
图7示出根据本申请一实施例的一种通信装置的结构图，如图7所示，该装置可以包括：第一模块701及第二模块702。一些实施例中，该第一模块701用于：第一设备向第二设备发送第一控制信息和第二控制信息，第一控制信息包含第一字段或第二字段中的至少一个，第一字段或第二字段中的至少一个指示第一控制信息的格式，第一字段或第二字段中的至少一个指示第二控制信息的格式；第一控制信息的格式至少包括第一格式a和第二格式a，第一格式a指示第二设备反馈指定消息的时频资源；第二格式a指示第一设备发送数据信道的传输信息；第二控制信息的格式至少包括第三格式和第四格式，第三格式指示第二设备反馈指定消息的冗余版本；第四格式指示第一设备发送数据信道的冗余版本；该第二模块702用于：在第一控制信息为第一格式a，第二控制信息为第三格式时，第一设备在时频资源上接收第二设备反馈的指定消息。
在一种可能的实现方式中，上述第一格式a还包括：指示该时频资源的至少一个字段。
在一种可能的实现方式中，上述第三格式还包括：指示指定消息的至少一个字段，其中，该指定消息包括：信道状态信息、辅助资源选择信息、定位信息、功率控制辅助信息中的至 少一项。
在一种可能的实现方式中，上述第一格式a还包括：指示第二设备反馈上述指定消息时使用的调制编码及解调导频信息的至少一个字段。
在一种可能的实现方式中，上述第一格式a还包括：指示第二设备反馈指定消息的周期的至少一个字段。
在一种可能的实现方式中，上述第三格式还包括：第一控制信息和第二控制信息的源标识的所有比特，及第一控制信息和第二控制信息的目的地标识的所有比特。
在一种可能的实现方式中，上述时频资源满足第二设备针对指定消息的时间处理能力。
在一种可能的实现方式中，上述第一控制信息或第二控制信息包括：侧行链路控制信息，上述数据信道包括：侧行链路物理共享信道。
本申请实施例中，第一设备向第二设备发送第一控制信息和第二控制信息，其中，该第一控制信息包含第一字段或第二字段中的至少一个，该第一字段或第二字段中的至少一个指示该第一控制信息的格式，该第一字段或第二字段中的至少一个指示该第二控制信息的格式；第一设备通过第一控制信息的第一格式a指示第二设备反馈指定消息的时频资源，通过第二控制信息的第三格式指示第二设备反馈指定消息的冗余版本，并在该时频资源上接收第二设备反馈的该指定消息；这样，第一设备通过为指定消息预留时频资源，从而保证指定消息的及时、成功地反馈，提升***性能，同时，第一设备直接在该时频资源上接收第二设备反馈的该指定消息，无需盲检该指定消息所在的时频资源，也无需检测控制信息，节省了第一设备的功耗。
另一些实施例中，该第一模块701用于：第二设备接收第一设备发送的第一控制信息和第二控制信息；第一控制信息包含第一字段或第二字段中的至少一个，第一字段或第二字段中的至少一个指示第一控制信息的格式，第一字段或第二字段中的至少一个指示第二控制信息的格式；第一控制信息的格式至少包括第一格式a和第二格式a，第一格式a指示第二设备反馈指定消息的时频资源；第二格式a指示第一设备发送数据信道的传输信息；第二控制信息的格式至少包括第三格式和第四格式，第三格式指示第二设备反馈指定消息的冗余版本；第四格式指示第一设备发送数据信道的冗余版本；该第二模块702用于：在第一控制信息为第一格式a，第二控制信息为第三格式时，第二设备在时频资源上向第一设备反馈指定消息。
在一种可能的实现方式中，上述第一格式a还包括：指示上述时频资源的至少一个字段。
在一种可能的实现方式中，上述第三格式还包括：指示指定消息的至少一个字段，其中，指定消息包括：信道状态信息、辅助资源选择信息、定位信息、功率控制辅助信息中的至少一项。
在一种可能的实现方式中，上述第一格式a还包括：指示第二设备反馈指定消息时使用的调制编码及解调导频信息的至少一个字段。
在一种可能的实现方式中，上述第一格式a还包括：指示第二设备反馈指定消息的周期的至少一个字段。
在一种可能的实现方式中，上述第三格式还包括：第一控制信息和第二控制信息的源标识的所有比特，及第一控制信息和第二控制信息的目的地标识的所有比特。
在一种可能的实现方式中，上述第一模块701还用于：在目的地标识与第二设备的自身标识不同时，第二设备不使用上述时频资源。
在一种可能的实现方式中，上述时频资源满足第二设备针对指定消息的时间处理能力。
本申请实施例中，第二设备接收第一设备发送的第一控制信息和第二控制信息，其中，该第一控制信息包含第一字段或第二字段中的至少一个，该第一字段或第二字段中的至少一个指示该第一控制信息的格式，该第一字段或第二字段中的至少一个指示该第二控制信息的格式；第一控制信息的第一格式a指示第二设备反馈指定消息的时频资源，第二控制信息的第三格式指示第二设备反馈指定消息的冗余版本，在第一控制信息为第一格式a，且第二控制信息为第三类格式时，第二设备在该时频资源上向第一设备反馈该指定消息；这样，第二设备在预留的时频资源上反馈该指定消息，从而保证指定消息的及时、成功地反馈，提升***性能，同时，第二设备在发送该指定消息时，无需通过信道竞争选择时频资源，也无需发送控制信息，节省了第二设备的功耗。
另一些实施例中，该第一模块701用于：第一设备向第二设备发送第一控制信息、第二控制信息及数据信道；第一控制信息指示第一设备发送数据信道的传输信息；第一控制信息包括指示第二控制信息的格式的至少一个字段；第二控制信息的格式至少包括第一格式b和第二格式b，第一格式b指示第二设备反馈指定消息的时频资源；第二格式b指示第一设备发送数据信道的冗余版本；该第二模块702用于：在第二控制信息为第一格式b时，第一设备接收第二设备发送的指定消息、指示第二设备发送指定消息的传输信息的控制信息、及指示第二设备发送指定消息的冗余版本的控制信息；其中，指定消息占用部分或全部该时频资源。
在一种可能的实现方式中，上述第一格式b还包括：指示上述时频资源的至少一个字段。
在一种可能的实现方式中，上述第一格式b还包括：指示指定消息的至少一个字段，其中，指定消息包括：信道状态信息、辅助资源选择信息、定位信息、功率控制辅助信息中的至少一项。
在一种可能的实现方式中，上述第一格式b还包括：指示第二设备反馈指定消息的周期的至少一个字段。
在一种可能的实现方式中，上述时频资源满足第二设备针对指定消息的时间处理能力。
在一种可能的实现方式中，上述第一控制信息或第二控制信息包括：侧行链路控制信息，数据信道包括：侧行链路物理共享信道。
本申请实施例中，第一设备向第二设备发送第一控制信息、第二控制信息及数据信道；；第一控制信息指示第一设备发送数据信道的传输信息；第一控制信息包括指示第二控制信息的格式的至少一个字段；第一设备通过第二控制信息的第一格式b指示第二设备反馈指定消息的时频资源；并接收第二设备发送的该指定消息、指示第二设备发送该指定消息的传输信息的控制信息、及指示第二设备发送该指定消息的冗余版本的控制信息，第六控制信息用于指示第二设备发送该指定消息的冗余版本，且指定消息占用部分或全部该时频资源；这样，第一设备通过为指定消息预留时频资源，从而保证指定消息的及时、成功地反馈，提升***性能。
另一些实施例中，该第一模块701用于：第二设备接收第一设备发送的第一控制信息、第二控制信息及数据信道；第一控制信息指示第一设备发送数据信道的传输信息；第一控制信息包括指示第二控制信息的格式的至少一个字段；第二控制信息的格式至少包括第一格式b和第二格式b，第一格式b指示第二设备反馈指定消息的时频资源；第二格式b指示第一设 备发送数据信道的冗余版本；该第二模块702用于：在第二控制信息为第一格式b时，第二设备向第一设备发送指定消息、指示第二设备发送指定消息的传输信息的控制信息、及指示第二设备发送指定消息的冗余版本的控制信息；其中，指定消息占用部分或全部该时频资源。
在一种可能的实现方式中，上述第一格式b还包括：指示上述时频资源的至少一个字段。
在一种可能的实现方式中，上述第一格式b还包括：指示指定消息的至少一个字段，其中，指定消息包括：信道状态信息、辅助资源选择信息、定位信息、功率控制辅助信息中的至少一项。
在一种可能的实现方式中，上述第一格式b还包括：指示第二设备反馈指定消息的周期的至少一个字段。
在一种可能的实现方式中，上述时频资源满足第二设备针对指定消息的时间处理能力。
本申请实施例中，第二设备接收第一设备发送的第一控制信息、第二控制信息及数据信道；第一控制信息指示第一设备发送数据信道的传输信息；第一控制信息包括指示第二控制信息的格式的至少一个字段；第二控制信息的第一格式b用于指示第二设备反馈指定消息的时频资源；在该第二控制信息为第一格式b时，第二设备向所第一设备发送该指定消息、指示第二设备发送指定消息的传输信息的控制信息、及指示第二设备发送指定消息的冗余版本的控制信息，且该指定消息占用部分或全部该时频资源；这样，第二设备在部分或全部预留的时频资源上反馈该指定消息，从而保证指定消息的及时、成功地反馈，提升***性能；同时，第二设备在发送该指定消息时，无需通过信道竞争选择时频资源，节省了第二设备的功耗。
上述实施例的各种可能的实现方式或说明可参见上文，此处不再赘述。
本申请实施例还提供一种通信***，该通信***包括上述任一实施例中第一设备和第二设备，该第一设备用于执行图5所示的技术方案，该第二设备用于执行图5所示的技术方案。
本申请实施例还提供一种通信***，该通信***包括上述任一实施例中第一设备和第二设备，该第一设备用于执行图6所示的技术方案，该第二设备用于执行图6所示的技术方案。
图8示出根据本申请一实施例的一种通信装置的结构示意图，如图8所示，该通信装置可以包括：至少一个处理器3101，通信线路3102，存储器3103以及至少一个通信接口3104。
处理器3101可以是一个通用中央处理器(central processing unit，CPU)，微处理器，特定应用集成电路(application-specific integrated circuit，ASIC)，或一个或多个用于控制本申请方案程序执行的集成电路。
通信线路3102可包括一通路，在上述组件之间传送信息。
通信接口3104，使用任何收发器一类的装置，用于与其他设备或通信网络通信，如以太网，RAN，无线局域网(wireless local area networks，WLAN)等。
存储器3103可以是只读存储器(read-only memory，ROM)或可存储静态信息和指令的其他类型的静态存储设备，随机存取存储器(random access memory，RAM)或者可存储信息和指令的其他类型的动态存储设备，也可以是电可擦可编程只读存储器(electrically erasable programmable read-only memory，EEPROM)、只读光盘(compact disc read-only memory，CD-ROM)或其他光盘存储、光碟存储(包括压缩光碟、激光碟、光碟、数字通用光碟、蓝光光碟等)、磁盘存储介质或者其他磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质，但不限于此。存储器可以是 独立存在，通过通信线路3102与处理器相连接。存储器也可以和处理器集成在一起。本申请实施例提供的存储器通常可以具有非易失性。其中，存储器3103用于存储执行本申请方案的计算机执行指令，并由处理器3101来控制执行。处理器3101用于执行存储器3103中存储的计算机执行指令，从而实现本申请上述实施例中提供的方法。
可选的，本申请实施例中的计算机执行指令也可以称之为应用程序代码，本申请实施例对此不作具体限定。
在具体实现中，作为一种实施例，处理器3101可以包括一个或多个CPU，例如图8中的CPU0和CPU1。
在具体实现中，作为一种实施例，通信装置可以包括多个处理器，例如图8中的处理器3101和处理器3107。这些处理器中的每一个可以是一个单核(single-CPU)处理器，也可以是一个多核(multi-CPU)处理器。这里的处理器可以指一个或多个设备、电路、和/或用于处理数据(例如计算机程序指令)的处理核。
在具体实现中，作为一种实施例，通信装置还可以包括输出设备3105和输入设备3106。输出设备3105和处理器3101通信，可以以多种方式来显示信息。例如，输出设备3105可以是液晶显示器(liquid crystal display，LCD)，发光二级管(light emitting diode，LED)显示设备，阴极射线管(cathode ray tube，CRT)显示设备，或投影仪(projector)等。输入设备3106和处理器3101通信，可以以多种方式接收用户的输入。例如，输入设备3106可以是鼠标、键盘、触摸屏设备或传感设备等。
作为一个示例，结合图8所示的通信装置，图7中的第一模块701及第二模块702可以由图8中的通信接口3104及处理器3101来实现，本申请实施例对此不作任何限制。
图9示出根据本申请一实施例的一种芯片的结构示意图，如图9所示，图9所示的芯片可以为通用处理器，也可以为专用处理器。该芯片包括处理器3201。其中，处理器3201用于支持通信装置执行图5或者图6所示的技术方案。
可选的，该芯片还包括收发器3202，收发器3202用于接受处理器3201的控制，用于支持通信装置执行上述技术方案，示例性地，可以执行图5或者图6所示的方法。
可选的，图9所示的芯片还可以包括：存储介质3203。
需要说明的是，图9所示的芯片可以使用下述电路或者器件来实现：一个或多个现场可编程门阵列(field programmable gate array，FPGA)、可编程逻辑器件(programmable logic device，PLD)、控制器、状态机、门逻辑、分立硬件部件、任何其他适合的电路、或者能够执行本申请通篇所描述的各种功能的电路的任意组合。
本申请实施例提供了一种非易失性计算机可读存储介质，其上存储有计算机程序指令，所述计算机程序指令被处理器执行时实现上述技术方案，示例性地，可以执行图5或者图6所示的方法。
本申请实施例提供了一种计算机程序产品，包括计算机可读代码，或者承载有计算机可读代码的非易失性计算机可读存储介质，当所述计算机可读代码在电子设备的处理器中运行时，所述电子设备中的处理器执行上述技术方案，示例性地，可以执行图5或者图6所示的方法。
计算机可读存储介质可以是可以保持和存储由指令执行设备使用的指令的有形设备。计 算机可读存储介质例如可以是――但不限于――电存储设备、磁存储设备、光存储设备、电磁存储设备、半导体存储设备或者上述的任意合适的组合。
这里所描述的计算机可读程序指令或代码可以从计算机可读存储介质下载到各个计算/处理设备，或者通过网络、例如因特网、局域网、广域网和/或无线网下载到外部计算机或外部存储设备。网络可以包括铜传输电缆、光纤传输、无线传输、路由器、防火墙、交换机、网关计算机和/或边缘服务器。每个计算/处理设备中的网络适配卡或者网络接口从网络接收计算机可读程序指令，并转发该计算机可读程序指令，以供存储在各个计算/处理设备中的计算机可读存储介质中。
用于执行本申请操作的计算机程序指令可以是汇编指令、指令集架构(Instruction Set Architecture，ISA)指令、机器指令、机器相关指令、微代码、固件指令、状态设置数据、或者以一种或多种编程语言的任意组合编写的源代码或目标代码，所述编程语言包括面向对象的编程语言—诸如Smalltalk、C++等，以及常规的过程式编程语言—诸如“C”语言或类似的编程语言。计算机可读程序指令可以完全地在用户计算机上执行、部分地在用户计算机上执行、作为一个独立的软件包执行、部分在用户计算机上部分在远程计算机上执行、或者完全在远程计算机或服务器上执行。在涉及远程计算机的情形中，远程计算机可以通过任意种类的网络—包括局域网(Local Area Network，LAN)或广域网(Wide Area Network，WAN)—连接到用户计算机，或者，可以连接到外部计算机(例如利用因特网服务提供商来通过因特网连接)。在一些实施例中，通过利用计算机可读程序指令的状态信息来个性化定制电子电路，例如可编程逻辑电路、现场可编程门阵列(Field-Programmable Gate Array，FPGA)或可编程逻辑阵列(Programmable Logic Array，PLA)，该电子电路可以执行计算机可读程序指令，从而实现本申请的各个方面。
这里参照根据本申请实施例的方法、装置(***)和计算机程序产品的流程图和/或框图描述了本申请的各个方面。应当理解，流程图和/或框图的每个方框以及流程图和/或框图中各方框的组合，都可以由计算机可读程序指令实现。
这些计算机可读程序指令可以提供给通用计算机、专用计算机或其它可编程数据处理装置的处理器，从而生产出一种机器，使得这些指令在通过计算机或其它可编程数据处理装置的处理器执行时，产生了实现流程图和/或框图中的一个或多个方框中规定的功能/动作的装置。也可以把这些计算机可读程序指令存储在计算机可读存储介质中，这些指令使得计算机、可编程数据处理装置和/或其他设备以特定方式工作，从而，存储有指令的计算机可读介质则包括一个制造品，其包括实现流程图和/或框图中的一个或多个方框中规定的功能/动作的各个方面的指令。
也可以把计算机可读程序指令加载到计算机、其它可编程数据处理装置、或其它设备上，使得在计算机、其它可编程数据处理装置或其它设备上执行一系列操作步骤，以产生计算机实现的过程，从而使得在计算机、其它可编程数据处理装置、或其它设备上执行的指令实现流程图和/或框图中的一个或多个方框中规定的功能/动作。
附图中的流程图和框图显示了根据本申请的多个实施例的装置、***、方法和计算机程序产品的可能实现的体系架构、功能和操作。在这点上，流程图或框图中的每个方框可以代表一个模块、程序段或指令的一部分，所述模块、程序段或指令的一部分包含一个或多个用于实现规定的逻辑功能的可执行指令。在有些作为替换的实现中，方框中所标注的功能也可 以以不同于附图中所标注的顺序发生。例如，两个连续的方框实际上可以基本并行地执行，它们有时也可以按相反的顺序执行，这依所涉及的功能而定。
也要注意的是，框图和/或流程图中的每个方框、以及框图和/或流程图中的方框的组合，可以用执行相应的功能或动作的硬件(例如电路或ASIC(Application Specific Integrated Circuit，专用集成电路))来实现，或者可以用硬件和软件的组合，如固件等来实现。
尽管在此结合各实施例对本发明进行了描述，然而，在实施所要求保护的本发明过程中，本领域技术人员通过查看所述附图、公开内容、以及所附权利要求书，可理解并实现所述公开实施例的其它变化。在权利要求中，“包括”(comprising)一词不排除其他组成部分或步骤，“一”或“一个”不排除多个的情况。单个处理器或其它单元可以实现权利要求中列举的若干项功能。相互不同的从属权利要求中记载了某些措施，但这并不表示这些措施不能组合起来产生良好的效果。
以上已经描述了本申请的各实施例，上述说明是示例性的，并非穷尽性的，并且也不限于所披露的各实施例。在不偏离所说明的各实施例的范围和精神的情况下，对于本技术领域的普通技术人员来说许多修改和变更都是显而易见的。本文中所用术语的选择，旨在最好地解释各实施例的原理、实际应用或对市场中的技术的改进，或者使本技术领域的其它普通技术人员能理解本文披露的各实施例。

Claims (31)

  1. 一种通信方法，其特征在于，所述方法包括：
    第一设备向第二设备发送第一控制信息和第二控制信息，所述第一控制信息包含第一字段或第二字段中的至少一个，所述第一字段或第二字段中的至少一个指示所述第一控制信息的格式，所述第一字段或第二字段中的至少一个指示所述第二控制信息的格式；
    所述第一控制信息的格式至少包括第一格式和第二格式，所述第一格式指示所述第二设备反馈指定消息的时频资源，所述第二格式指示所述第一设备发送数据信道的传输信息；
    所述第二控制信息的格式至少包括第三格式和第四格式，所述第三格式指示所述第二设备反馈所述指定消息的冗余版本，所述第四格式指示所述第一设备发送所述数据信道的冗余版本；
    在所述第一控制信息为所述第一格式，所述第二控制信息为所述第三格式时，所述第一设备在所述时频资源上接收所述第二设备反馈的所述指定消息。
  2. 根据权利要求1所述的方法，其特征在于，所述第一格式还包括：指示所述时频资源的至少一个字段。
  3. 根据权利要求1所述的方法，其特征在于，所述第三格式还包括：指示所述指定消息的至少一个字段，其中，所述指定消息包括：信道状态信息CSI、辅助资源选择信息、定位信息、功率控制辅助信息中的至少一项。
  4. 根据权利要求1所述的方法，其特征在于，所述第一格式还包括：指示所述第二设备反馈所述指定消息时使用的调制编码及解调导频信息的至少一个字段。
  5. 根据权利要求1所述的方法，其特征在于，所述第一格式还包括：指示所述第二设备反馈所述指定消息的周期的至少一个字段。
  6. 根据权利要求1所述的方法，其特征在于，所述第三格式还包括：所述第一控制信息和所述第二控制信息的源标识的所有比特，及所述第一控制信息和所述第二控制信息的目的地标识的所有比特。
  7. 根据权利要求1所述的方法，其特征在于，所述时频资源满足所述第二设备针对所述指定消息的时间处理能力。
  8. 根据权利要求1-7中任意一项所述的方法，其特征在于，所述第一控制信息或所述第二控制信息包括：侧行链路控制信息SCI，所述数据信道包括：侧行链路物理共享信道PSSCH。
  9. 一种通信方法，其特征在于，所述方法包括：
    第二设备接收第一设备发送的第一控制信息和第二控制信息；所述第一控制信息包含第 一字段或第二字段中的至少一个，所述第一字段或第二字段中的至少一个指示所述第一控制信息的格式，所述第一字段或第二字段中的至少一个指示所述第二控制信息的格式；
    所述第一控制信息的格式至少包括第一格式和第二格式，所述第一格式指示所述第二设备反馈指定消息的时频资源，所述第二格式指示所述第一设备发送数据信道的传输信息；
    所述第二控制信息的格式至少包括第三格式和第四格式，所述第三格式指示所述第二设备反馈所述指定消息的冗余版本，所述第四格式指示所述第一设备发送所述数据信道的冗余版本；
    在所述第一控制信息为所述第一格式，所述第二控制信息为所述第三格式时，所述第二设备在所述时频资源上向所述第一设备反馈所述指定消息。
  10. 根据权利要求9所述的方法，其特征在于，所述第一格式还包括：指示所述时频资源的至少一个字段。
  11. 根据权利要求9所述的方法，其特征在于，所述第三格式还包括：指示所述指定消息的至少一个字段，其中，所述指定消息包括：信道状态信息CSI、辅助资源选择信息、定位信息、功率控制辅助信息中的至少一项。
  12. 根据权利要求9所述的方法，其特征在于，所述第一格式还包括：指示所述第二设备反馈所述指定消息时使用的调制编码及解调导频信息的至少一个字段。
  13. 根据权利要求9所述的方法，其特征在于，所述第一格式还包括：指示所述第二设备反馈所述指定消息的周期的至少一个字段。
  14. 根据权利要求9所述的方法，其特征在于，所述第三格式还包括：所述第一控制信息和所述第二控制信息的源标识的所有比特，及所述第一控制信息和所述第二控制信息的目的地标识的所有比特。
  15. 根据权利要求14所述的方法，其特征在于，所述方法还包括：在所述目的地标识与所述第二设备的自身标识不同时，所述第二设备不使用所述时频资源。
  16. 根据权利要求9所述的方法，其特征在于，所述时频资源满足所述第二设备针对所述指定消息的时间处理能力。
  17. 一种通信方法，其特征在于，所述方法包括：
    第一设备向第二设备发送第一控制信息、第二控制信息及数据信道；所述第一控制信息指示所述第一设备发送所述数据信道的传输信息；所述第一控制信息包括指示所述第二控制信息的格式的至少一个字段；
    所述第二控制信息的格式至少包括第一格式和第二格式，所述第一格式指示所述第二设备反馈指定消息的时频资源，所述第二格式指示所述第一设备发送所述数据信道的冗余版本；
    在所述第二控制信息为第一格式时，所述第一设备接收所述第二设备发送的所述指定消息、指示所述第二设备发送所述指定消息的传输信息的控制信息、及指示所述第二设备发送所述指定消息的冗余版本的控制信息；其中，所述指定消息占用部分或全部所述时频资源。
  18. 根据权利要求17所述的方法，其特征在于，所述第一格式还包括：指示所述时频资源的至少一个字段。
  19. 根据权利要求17所述的方法，其特征在于，所述第一格式还包括：指示所述指定消息的至少一个字段，其中，所述指定消息包括：信道状态信息CSI、辅助资源选择信息、定位信息、功率控制辅助信息中的至少一项。
  20. 根据权利要求17所述的方法，其特征在于，所述第一格式还包括：指示所述第二设备反馈所述指定消息的周期的至少一个字段。
  21. 根据权利要求17所述的方法，其特征在于，所述时频资源满足所述第二设备针对所述指定消息的时间处理能力。
  22. 根据权利要求17-21中任意一项所述的方法，其特征在于，所述第一控制信息或所述第二控制信息包括：侧行链路控制信息SCI，所述数据信道包括：侧行链路物理共享信道PSSCH。
  23. 一种通信方法，其特征在于，所述方法包括：
    第二设备接收第一设备发送的第一控制信息、第二控制信息及数据信道；所述第一控制信息指示所述第一设备发送所述数据信道的传输信息；所述第一控制信息包括指示所述第二控制信息的格式的至少一个字段；
    所述第二控制信息的格式至少包括第一格式和第二格式，所述第一格式指示所述第二设备反馈指定消息的时频资源，所述第二格式指示所述第一设备发送所述数据信道的冗余版本；
    在所述第二控制信息为第一格式时，所述第二设备向所述第一设备发送所述指定消息、指示所述第二设备发送所述指定消息的传输信息的控制信息、及指示所述第二设备发送所述指定消息的冗余版本的控制信息；其中，所述指定消息占用部分或全部所述时频资源。
  24. 根据权利要求23所述的方法，其特征在于，所述第一格式还包括：指示所述时频资源的至少一个字段。
  25. 根据权利要求23所述的方法，其特征在于，所述第一格式还包括：指示所述指定消息的至少一个字段，其中，所述指定消息包括：信道状态信息CSI、辅助资源选择信息、定位信息、功率控制辅助信息中的至少一项。
  26. 根据权利要求23所述的方法，其特征在于，所述第一格式还包括：指示所述第二设备反馈所述指定消息的周期的至少一个字段。
  27. 根据权利要求23所述的方法，其特征在于，所述时频资源满足所述第二设备针对所述指定消息的时间处理能力。
  28. 一种通信装置，其特征在于，包括：
    处理器；
    用于存储处理器可执行指令的存储器；
    其中，所述处理器被配置为执行所述指令时实现权利要求1-8任意一项所述的方法，或者实现权利要求9-16任意一项所述的方法，或者实现权利要求17-22任意一项所述的方法，或者实现权利要求23-27任意一项所述的方法。
  29. 一种非易失性计算机可读存储介质，其上存储有计算机程序指令，其特征在于，所述计算机程序指令被处理器执行时实现权利要求1-8中任意一项所述的方法，或者，实现权利要求9-16任意一项所述的方法，或者实现权利要求17-22任意一项所述的方法，或者实现权利要求23-27任意一项所述的方法。
  30. 一种芯片，其特征在于，包括处理器，当所述处理器执行指令时，所述处理器执行权利要求1-8中任意一项所述的方法，或者，执行权利要求9-16任意一项所述的方法，或者执行权利要求17-22任意一项所述的方法，或者执行权利要求23-27任意一项所述的方法。
  31. 一种包含指令的计算机程序产品，其特征在于，当其在计算机上运行时，使得计算机执行权利要求1-8中任意一项所述的方法，或者，执行权利要求9-16任意一项所述的方法，或者实执行权利要求17-22任意一项所述的方法，或者执行权利要求23-27任意一项所述的方法。
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