WO2022028268A1 - 通信方法及装置 - Google Patents

通信方法及装置 Download PDF

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Publication number
WO2022028268A1
WO2022028268A1 PCT/CN2021/108482 CN2021108482W WO2022028268A1 WO 2022028268 A1 WO2022028268 A1 WO 2022028268A1 CN 2021108482 W CN2021108482 W CN 2021108482W WO 2022028268 A1 WO2022028268 A1 WO 2022028268A1
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Prior art keywords
information
resource
communication
time slot
psfch
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PCT/CN2021/108482
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English (en)
French (fr)
Inventor
黄海宁
黎超
杨帆
郭文婷
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP21853857.7A priority Critical patent/EP4188014A4/en
Priority to JP2023508585A priority patent/JP2023538289A/ja
Publication of WO2022028268A1 publication Critical patent/WO2022028268A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607—Details of the supervisory signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • 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]
    • 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
    • H04L1/1854—Scheduling and prioritising arrangements
    • 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
    • H04L1/1896—ARQ related signaling
    • 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
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK
    • 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
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • 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
    • H04L2001/0092—Error control systems characterised by the topology of the transmission link
    • H04L2001/0093—Point-to-multipoint
    • 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
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/18—Interfaces between hierarchically similar devices between terminal devices

Definitions

  • the present application relates to the field of communication technologies, and in particular, to a communication method and device.
  • SSL communication is a communication method in which things are directly connected. Unlike traditional communication data between devices that must pass through network devices, sidelink communication allows direct transmission between devices. communication data.
  • the device that transmits communication data sends communication data to the receiving device, and the device that receives communication data receives communication data sent from the transmitting device.
  • the device may determine the communication resources used for the sidelink communication by itself. For example, a device sending data in sidelink communication (referred to as TX UE) may send request information to other devices before sending sidelink communication data to a device receiving data (referred to as RX UE). , and determine the communication resources that the TX UE can use when sending sidelink communication data to the RX UE according to the communication resource information fed back by the request information.
  • TX UE a device sending data in sidelink communication
  • RX UE device receiving data
  • the TX UE after the TX UE sends the request information, if other devices do not receive the request information or cannot feed back the communication resources for the TX UE, the TX UE needs to wait for a long time or repeat the sending of the request information for many times. , the communication resource will continue to be determined by other means, which increases the delay of the device in determining the communication resource used in the sidelink communication, and reduces the communication efficiency when the device performs the sidelink communication.
  • the present application provides a communication method and apparatus to solve the technical problem in the prior art that the delay of communication resources is relatively large when a device determines sidelink communication, thereby improving the communication efficiency when the device performs sidelink communication.
  • a first aspect of the present application provides a communication method.
  • the first device receives data from the second device before sending sidelink communication data to the third device.
  • the sent second information wherein the second information indicates that the second device can provide resource assistance information for the first device. Therefore, before performing sidelink communication, the first device determines that the second device can provide resource assistance information to it, so that the first device can use the resource assistance information sent by the second device as a reference, and finally determines that it communicates with the third device.
  • the communication resources used when performing sidelink communication further improve the communication efficiency when the first device performs sidelink communication.
  • the communication resources include: time resources, frequency resources, and/or time-frequency resources, and the like.
  • the second device that can provide the resource assistance information can actively send the second information to the first device, so as to indicate to the first device through the second information that the second device can provide the resource assistance information,
  • the information interaction between the first device and the second device is reduced, and the communication efficiency of the first device is further improved.
  • the first device before the first device receives the second information sent from the second device, and before sending the sidelink communication data to the third device, the first device may also actively send the data to the second device.
  • the device sends the first information to request the second device to obtain resource assistance information, and then, after receiving the first information, the second device can send the second information to the first device, so that the first device is sending the first information Afterwards, if the second information is received, at least it can be determined according to the second information that the second device has received the first information, thereby ensuring the reliability of the second information sent by the first device; and the first device can determine according to the second information Determine whether the second device provides resource assistance information, so that the first device can follow up the second information in time, determine whether to continue to wait for the resource assistance information sent by the second device, or give up waiting for the second device to send the resource assistance information as soon as possible, so as to reduce The terminal device has been waiting for the delay caused by the resource auxiliary information provided by the second device, thereby ensuring the
  • the second information may be used to indicate whether the second device provides resource assistance information for the first device. Then when the second device determines that it can provide resource assistance information for the first device, the second information sent by the second device instructs the second device to provide resource assistance information for the first device; the second device determines that it cannot provide resource assistance for the first device. information, the second information sent by the second device indicates that the second device does not provide resource assistance information for the first device. Then, for the first device, after receiving the second information, it may be determined whether the second device can provide resource assistance information for the first device according to the second information.
  • the second information is only used to instruct the second device to provide resource assistance information for the first device, and if the first device does not receive the second information, it means that the second device does not provide resource assistance information for the second device.
  • the second information sent by the second device instructs the second device to provide resource assistance information for the first device;
  • the second information may not be sent to the first device, and when the first device has not received the second information within a period of time, the first device may at least make the following judgment: the second device has not received the first information; Or the second device does not provide resource assistance information for the first device.
  • the first device may send the first information to the second device again, or send the first information to other devices, or use other methods to determine the resources used by the first device for sidelink communication.
  • the second information sent by the second device to the first device is carried by the first channel, and the first channel may be the PSFCH.
  • the PSFCH carries the second information, so that the local The embodiment is easy to implement and general.
  • the first channel may also be a newly defined channel, and the newly defined channel may be, for example, PSRCH.
  • the second information carried by the new channel is used so that the second information added in this embodiment is not exchanged during interaction. Will affect the expression of other existing channels.
  • the second information when the second information is carried by the first channel and the second information can be used to indicate whether the second device provides resource assistance information for the first device, the second information can correspond to the first channel Different sequence cyclic shift values to indicate "yes" or "no". For example, when the second information indicates that the second device provides resource assistance information for the first device, the second information may correspond to the first sequence cyclic shift value of the first channel; when the second information indicates that the second device is not the first device The device provides resource assistance information, the second information corresponding to the second sequence cyclic shift value of the first channel.
  • the second information when the second device is carried by the first channel and the second information is used to instruct the second device to provide resource assistance information for the first device, the second information may be indicated corresponding to the sequence cyclic shift value of the first channel, For example, when the second information indicates that the second device provides resource assistance information for the first device, the second information may correspond to a third sequence of cyclic shift values of the first channel.
  • the second information when the first channel carrying the second information is the PSFCH, the second information is specifically carried in the first resource set.
  • the resource set used for transmitting the PSFCH resources carrying the second information is denoted as the first resource set
  • the resource set used for transmitting the PSFCH resources carrying the HARQ-ACK is denoted as the second resource set.
  • the first resource set and the second resource are complementary sets of PSFCH resources.
  • the above-mentioned first resource set may be specifically indicated in the form of a bitmap.
  • spectrum utilization efficiency is improved by rationally utilizing the complementary resources of the resource set used to transmit the PSFCH resources carrying HARQ-ACK, and the complementary resources can be used to transmit the second information, thereby providing the transmission of the first device. reliability.
  • the first device sends the first information to the second device in the first time slot
  • the second device sends the second information to the first device in the second time slot (which can be understood as the A device receives the second information from the second device in the second time slot).
  • the relative relationship between the first time slot and the second time slot may satisfy at least the following conditions, the second time slot is the first time slot including the PSFCH after the time slot where the last symbol of the first information is located, or,
  • the second time slot may be the first time slot including the PSFCH after an interval of N time units after the first time slot, or the time interval between the first time slot and the second time slot is N time units.
  • the second information sent by the second device to the first device may also be carried in a resource set for transmitting the first channel.
  • the set of resources for transmitting the first channel and the set of resources of the PSFCH are independently configured, and optionally, a configuration manner of frequency division multiplexing may be adopted.
  • the second information may also correspond to one or more bits in the first channel, and the one or more bits may be used to simultaneously indicate whether the second device provides the first device with The resource assistance information or the second device provides the first device with the resource assistance information, and indicates whether the second device successfully receives the data sent by the first device. Therefore, the second device may not use different resources to distinguish the HARQ information and the second information sent by the second device, but may jointly carry the HRAR information and the second information through one or more bits. And the second information provided in this embodiment may be carried in a resource set for transmitting PSFCH resources.
  • the first device sends the first information to the second device in the first time slot
  • the second device sends the second information to the first device in the second time slot
  • the first device is in The second time slot receives the second information from the second device.
  • the relative relationship between the first time slot and the second time slot may at least satisfy the following conditions: the second time slot is the first time slot including the PSFCH after the first time slot plus the time interval of M time units, Alternatively, the time interval between the first time slot and the second time slot is M time units.
  • the time interval is configured on the resource pool, and the time slot may be a logical time slot in the resource pool, or may be a physical time slot in or outside the resource pool.
  • the second device when the first device receives the second information sent by the second device (it can be understood that the first device receives the second information from the second device), and the second information indicates After the second device provides the resource assistance information for the first device, the second device may no longer send the second information to the first device in the subsequent second time period, but may receive the information periodically sent by the second device.
  • Resource assistance information That is, the first device receives the second information from the second device, the second information instructs the second device to provide resource assistance information for the first device, then the first device will receive the periodic resource assistance information from the second device .
  • This embodiment can be applied to a scenario where the first device may frequently request the same second device for resource assistance information in a short period of time, thereby reducing communication caused by frequent signaling interactions between the first device and the second device overhead and signaling overhead.
  • the first device may determine the resource assistance information in other ways, or determine the communication resource without using the resource assistance information.
  • the first device may determine the resource assistance information in other ways, or not The resource assistance information is used to determine the communication resource.
  • the above other manners include: the first device sends the first information to the fourth device, or the first device resends the first information to the second device again.
  • the fourth device is other than the above-described first device and second device.
  • a connection relationship can be established between the first device and the second device, then within the second time period, the first device The established connection relationship is maintained between one device and the second device. Specifically, if the first device sends the first information to the second device and requests the second device to provide resource assistance information to the first device, the second device may not send the second information to the first device to indicate that it can be the first device.
  • a device provides resource assistance information, but directly sends resource assistance information to the first device, so that the second device can continue to provide resource assistance information to the first device, especially directly to the first device without sending the second information.
  • Resource assistance information is provided, thereby reducing information interaction between the first device and the second device, and further improving communication efficiency.
  • the connection relationship established between the first device and the second device in the above-mentioned second time period may be disconnected by means of signaling.
  • the communication method further includes: the first device receives interruption information sent by the second device; the interruption information is used to instruct the second device to stop according to the first device.
  • the first information within the two time periods sends resource assistance information to the first device.
  • the second device can send the interruption information to the first device, and then when the first device receives the interruption information, the connection between the first device and the second device is disconnected. established connection. That is, the terminal information is used to indicate that the connection relationship is invalid.
  • the second device needs to send the second information to the first device before sending the resource assistance information to the first device. That is, after sending the first information, the first device needs to wait for the second information to determine that the second device provides resource assistance information for it.
  • the method further includes: the first device receives interruption information sent by the second device; the interruption information is used to indicate the second device The device stops sending resource assistance information to the first device within the second time period; or, the first device sends the interruption information to the second device.
  • the second device can send the interruption information to the first device, then when the first device receives the interruption information, the connection between the first device and the second device is disconnected.
  • the first device may also send interruption information to the second device, and then when the second device receives the interruption information, the connection relationship established between the first device and the second device is disconnected.
  • the second device needs to send the second information to the first device before sending the resource assistance information to the first device.
  • the first information is carried in signaling sent by the first device to the second device, and the signaling is sideline control information SCI or MAC CE.
  • the SCI includes a first-level SCI and/or a second-level SCI.
  • the signaling also includes one of PSCCH (physical sidelink control channel), PSSCH (physical sidelink shared channel), PC5 RRC, MAC, RRC, SIB, and MIB.
  • a second aspect of the present application provides a communication method, wherein, for a second device capable of providing resource assistance information, it can actively send second information to the first device to indicate to the first device through the second information that the second device can provide
  • the resource assistance information reduces the information interaction between the first device and the second device, and further improves the communication efficiency of the first device.
  • the second information indicates that the second device can provide resource assistance information for the first device. Therefore, before performing sidelink communication, the first device determines that the second device can provide resource assistance information to it, so that the first device can use the resource assistance information sent by the second device as a reference, and finally determines that it communicates with the third device.
  • the communication resources used when performing sidelink communication further improve the communication efficiency when the first device performs sidelink communication.
  • the communication resources include: time resources, frequency resources, and/or time-frequency resources, and the like.
  • the first device may also actively send the data to the second device.
  • the device sends the first information for requesting the second device to obtain resource assistance information.
  • it can send the second information to the first device, so that after sending the first information, if the first device receives the second information, it can at least determine according to the second information.
  • the second device receives the first information, thereby ensuring the reliability of the second information sent by the first device; and the first device can determine whether the second device provides resource assistance information according to the second information, so that the first device can follow up in time Enter the second information to determine whether to continue waiting for the resource assistance information sent by the second device, or give up waiting for the second device to send the resource assistance information as soon as possible, so as to reduce the delay caused by the terminal device waiting for the second device to provide the resource assistance information, Furthermore, the time delay requirement of data transmission is ensured, the communication efficiency and transmission reliability when the first device performs side link communication is improved, and the spectrum utilization rate is also improved.
  • the second information may be used to indicate whether the second device provides resource assistance information for the first device. Then when the second device determines that it can provide resource assistance information for the first device, the second information sent by the second device instructs the second device to provide resource assistance information for the first device; the second device determines that it cannot provide resource assistance for the first device. information, the second information sent by the second device indicates that the second device does not provide resource assistance information for the first device. Then, for the first device, after receiving the second information, it may be determined whether the second device can provide resource assistance information for the first device according to the second information.
  • the second information is only used to instruct the second device to provide resource assistance information for the first device, and if the first device does not receive the second information, it means that the second device does not provide resource assistance information for the second device.
  • the second information sent by the second device instructs the second device to provide resource assistance information for the first device;
  • the second information may not be sent to the first device, and when the first device has not received the second information within a period of time, the first device may at least make the following judgment: the second device has not received the first information; Or the second device does not provide resource assistance information for the first device.
  • the first device may send the first information to the second device again, or send the first information to other devices, or use other methods to determine the resources used by the first device for sidelink communication.
  • the second information sent by the second device to the first device is carried by a first channel
  • the first channel may be a PSFCH.
  • the PSFCH carries the second information, so that This embodiment is easy to implement and has universality.
  • the first channel may also be a newly defined channel, and the newly defined channel may be, for example, PSRCH.
  • the second information carried by the new channel is used so that the second information added in this embodiment is not exchanged during interaction. Will affect the expression of other existing channels.
  • the second information when the second information is carried by the first channel and the second information can be used to indicate whether the second device provides resource assistance information for the first device, the second information can correspond to the first Channel different sequence cyclic shift values to indicate "yes" or "no".
  • the second information when the second information indicates that the second device provides resource assistance information for the first device, the second information may correspond to the first sequence cyclic shift value of the first channel; when the second information indicates that the second device is not the first device The device provides resource assistance information, the second information corresponding to the second sequence cyclic shift value of the first channel.
  • the second information when the second device is carried by the first channel and the second information is used to instruct the second device to provide resource assistance information for the first device, the second information may be indicated corresponding to the sequence cyclic shift value of the first channel, For example, when the second information indicates that the second device provides resource assistance information for the first device, the second information may correspond to a third sequence of cyclic shift values of the first channel.
  • the second information when the first channel carrying the second information is the PSFCH, the second information is specifically carried in the first resource set.
  • the resource set used for transmitting the PSFCH resources carrying the second information is denoted as the first resource set
  • the resource set used for transmitting the PSFCH resources carrying the HARQ-ACK is denoted as the second resource set.
  • the first resource set and the second resource are complementary sets of PSFCH resources.
  • the above-mentioned first resource set may be specifically indicated in the form of a bitmap.
  • spectrum utilization efficiency is improved by rationally utilizing the complementary resources of the resource set used to transmit the PSFCH resources carrying HARQ-ACK, and the complementary resources can be used to transmit the second information, thereby providing the transmission of the first device. reliability.
  • the first device sends the first information to the second device in the first time slot
  • the second device sends the second information to the first device in the second time slot (which can be understood as the A device receives the second information from the second device in the second time slot).
  • the relative relationship between the first time slot and the second time slot may satisfy at least the following conditions, the second time slot is the first time slot including the PSFCH after the time slot where the last symbol of the first information is located, or,
  • the second time slot may be the first time slot including the PSFCH after an interval of N time units after the first time slot, or the time interval between the first time slot and the second time slot is N time units.
  • the second information sent by the second device to the first device may also be carried in a resource set for transmitting the first channel.
  • the set of resources for transmitting the first channel and the set of resources of the PSFCH are independently configured, and optionally, a configuration manner of frequency division multiplexing may be adopted.
  • the second information may also correspond to one or more bits in the first channel, and the one or more bits may be used to simultaneously indicate whether the second device provides the first device with The resource assistance information or the second device provides the first device with the resource assistance information, and indicates whether the second device successfully receives the data sent by the first device. Therefore, the second device may not use different resources to distinguish the HARQ information and the second information sent by the second device, but may jointly carry the HRAR information and the second information through one or more bits. And the second information provided in this embodiment may be carried in a resource set for transmitting PSFCH resources.
  • the first device sends the first information to the second device in the first time slot
  • the second device sends the second information to the first device in the second time slot
  • the first device is in The second time slot receives the second information from the second device.
  • the relative relationship between the first time slot and the second time slot may at least satisfy the following conditions: the second time slot is the first time slot including the PSFCH after the first time slot plus the time interval of M time units, Alternatively, the time interval between the first time slot and the second time slot is M time units.
  • the time interval is configured on the resource pool, and the time slot may be a logical time slot in the resource pool, or may be a physical time slot in or outside the resource pool.
  • the first device receives the second information sent by the second device (it can be understood that the first device receives the second information from the second device), and the second information indicates the first device
  • the second device may no longer send the second information to the first device in the subsequent second time period, but may receive the resources periodically sent by the second device Supplementary information. That is, the first device receives the second information from the second device, the second information instructs the second device to provide resource assistance information for the first device, then the first device will receive the periodic resource assistance information from the second device .
  • This embodiment can be applied to a scenario where the first device may frequently request the same second device for resource assistance information in a short period of time, thereby reducing communication caused by frequent signaling interactions between the first device and the second device overhead and signaling overhead.
  • a connection relationship can be established between the first device and the second device, then within the second time period, the first device The established connection relationship is maintained between one device and the second device. Specifically, if the first device sends the first information to the second device and requests the second device to provide resource assistance information to the first device, the second device may not send the second information to the first device to indicate that it can be the first device.
  • a device provides resource assistance information, but directly sends resource assistance information to the first device, so that the second device can continue to provide resource assistance information to the first device, especially directly to the first device without sending the second information.
  • Resource assistance information is provided, thereby reducing information interaction between the first device and the second device, and further improving communication efficiency.
  • the connection relationship established between the first device and the second device within the above-mentioned second time period may be disconnected by means of signaling instructions.
  • the communication method further includes: the first device receives interruption information sent by the second device; the interruption information is used to instruct the second device to stop according to the first device.
  • the first information within the two time periods sends resource assistance information to the first device.
  • the second device can send the interruption information to the first device, and then when the first device receives the interruption information, the connection between the first device and the second device is disconnected. established connection. That is, the terminal information is used to indicate that the connection relationship is invalid.
  • the second device needs to send the second information to the first device before sending the resource assistance information to the first device. That is, after sending the first information, the first device needs to wait for the second information to determine that the second device provides resource assistance information for it.
  • the method further includes: the first device receives interruption information sent by the second device; the interruption information is used to indicate the second device The device stops sending resource assistance information to the first device within the second time period; or, the first device sends the interruption information to the second device.
  • the second device can send the interruption information to the first device, then when the first device receives the interruption information, the connection between the first device and the second device is disconnected.
  • the first device may also send interruption information to the second device, and then when the second device receives the interruption information, the connection relationship established between the first device and the second device is disconnected.
  • the second device also needs to send the second information to the first device before sending the resource assistance information to the first device.
  • the first information is carried in signaling sent by the first device to the second device, where the signaling is sideline control information SCI or MAC CE.
  • the SCI includes a first-level SCI and/or a second-level SCI.
  • the signaling further includes one of PSCCH (physical sidelink control channel), PSSCH (physical sidelink shared channel), PC5RRC, MAC, RRC, SIB, and MIB.
  • a third aspect of the present application provides a communication method, including:
  • the first device sends first information to the second device; wherein the first information is used to request acquisition of resource assistance information;
  • the first device does not receive the second information within the first time period, and the first device sends the first information to the fourth device; or, the first device sends the second device the first information; or, the first device does not use the resource assistance information to determine a communication resource. Alternatively, the first device no longer waits to receive the second information, or the first device resends the first information.
  • the second information indicates that the second device provides resource assistance information for the first device; or, the second information is specifically used to indicate whether the second device provides the first device with the resource assistance information. Resource assistance information. Alternatively, the second information is resource assistance information.
  • the first device sends the first device to the second device before sending the sidelink communication data to the third device.
  • information which is used to request the second device to obtain resource assistance information.
  • the first device does not receive the second information within the first time period, other methods are used to determine the communication resources instead of waiting for the response or resource assistance information from the second device, so that the delay can be reduced.
  • this embodiment can also ensure the delay requirement and reliability of data transmission, and improve the timeliness of the resource assistance information.
  • the first time period may be configured by the network device, and specifically, may be one of an RRC message, a MAC message, a MAC CE message, a MIB message, and a SIB message. It may be associated with the resource pool, and may be maintained by the timer of the first device, that is, the first device activates the timer after sending the first message, and the length of the timer is the first time period. Waiting to receive the second information during the first time period. The length of the timer is configured by the network device.
  • a fourth aspect of the present application provides a communication device, which can be used to execute the communication method according to any one of the first aspects of the present application.
  • the device can include: a processing module and a communication module, wherein the communication module can be used to implement the communication device.
  • the processing module may be configured to execute the communication method described in any one of the first aspects.
  • the communication module may be configured to receive second information from the second device.
  • the communication module may be further configured to send the first information to the second device.
  • the communication module is further configured to send the first information to the fourth device.
  • the communication module may also be specifically configured to, within the second time period, send the first information to the second device, and receive the resource assistance information sent by the second device according to the first information.
  • a fifth aspect of the present application provides a communication device, which can be used to execute the communication method according to any one of the second aspects of the present application.
  • the device can include: a processing module and a communication module, wherein the communication module can be used to implement the communication device.
  • the processing module may be configured to execute the communication method described in any one of the second aspects.
  • the communication module may be configured to send the second information to the first device.
  • the communication module may be configured to receive the first information sent by the first device.
  • the communication module may be further configured to send resource assistance information to the first device at least once within the second time period.
  • the communication module may also be specifically configured to receive the first information sent from the first device within the second time period, and the processor may be configured to send the information to the second device according to the first information. Send resource assistance information.
  • a sixth aspect of the present application provides a communication device, which can be used to execute the communication method according to any one of the third aspect of the present application.
  • the device can include: a processing module and a communication module, wherein the communication module can be used to implement the communication device.
  • the processing module may be configured to execute the communication method described in any one of the first aspects.
  • the communication module may be configured to send the first information to the second device; then, if the second information is not received within the first time period, the communication module is further configured to send the first information to the second device.
  • the fourth device sends the first information; or, the communication module is further configured to send the first information to the second device; or, the communication apparatus does not use the resource assistance information to determine a communication resource.
  • an embodiment of the present application provides a communication apparatus, including: a processor and a communication interface.
  • the communication interface is used to realize the connection communication between the communication device and the peripheral device.
  • the processor is configured to implement the method described in the first aspect, the second aspect, the third aspect, the fourth aspect, the fifth aspect or the sixth aspect.
  • the above communication device further includes: a memory.
  • the memory is used to store a computer program, and the processor executes the computer program stored in the memory, so that the apparatus performs the above-mentioned first aspect, second aspect, third aspect, fourth aspect, fifth aspect or The method described in the sixth aspect.
  • the above communication device further includes: a transceiver.
  • the transceiver is used for messaging.
  • an embodiment of the present application provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program, and when the computer program is run, the first aspect, the second aspect or the first aspect described above is implemented.
  • an embodiment of the present application provides a chip, including a processor and a communication interface
  • the communication interface is used to communicate with other devices
  • the processor is configured to read instructions to implement the method as described in the first aspect, the second aspect or the third aspect above.
  • an embodiment of the present application provides a computer program product, where the computer program product includes computer program code, and when the computer program code is executed by a computer, the computer is made to perform the above-mentioned first and second aspects. Or the method described in the third aspect.
  • an embodiment of the present application provides a communication system, wherein the communication system includes the communication device according to any one of the fourth aspect of the present application as the first device and the communication device described in any one of the fifth aspect of the present application. or the communication device according to any one of the sixth aspect of the present application as the first device and the second device of the communication device according to any one of the fifth aspect of the present application.
  • FIG. 1 is a schematic diagram of the architecture of a communication system to which an embodiment of the application can be applied;
  • FIG. 2 is a schematic diagram of a V2X scenario applied in this application
  • FIG. 3 is a schematic diagram of a time slot structure used when a V2X communication device in a communication system performs sidelink communication;
  • FIG. 4 is a schematic diagram of a time slot structure used when another V2X communication device performs sidelink communication
  • 5 is a schematic diagram of a terminal device performing sidelink communication
  • FIG. 6 is a schematic flowchart of an embodiment of a communication method provided by the present application.
  • 6A is a schematic flowchart of an embodiment of a communication method provided by the present application.
  • FIG. 7 is a schematic flowchart of an embodiment of a communication method provided by the present application.
  • FIG. 7A is a schematic flowchart of an embodiment of a communication method provided by the present application.
  • FIG. 9 is a schematic flowchart of an embodiment of a communication method provided by the present application.
  • FIG. 10 is a schematic flowchart of an embodiment of a communication method provided by this application.
  • FIG. 11 is a schematic flowchart of an embodiment of a communication method provided by this application.
  • FIG. 12 is a schematic flowchart of an embodiment of a communication method provided by the present application.
  • FIG. 13 is a schematic flowchart of an embodiment of a communication method provided by this application.
  • 16 is a schematic structural diagram of an embodiment of a communication device provided by the present application.
  • FIG. 17 is a schematic structural diagram of an embodiment of a communication device provided by the present application.
  • FIG. 1 is a schematic structural diagram of a communication system to which an embodiment of the application can be applied.
  • the communication system shown in FIG. 1 includes a network device and at least one terminal device (for example, terminal device 1 and terminal device 2 in FIG. 1 ).
  • the terminal device may Connect to network devices wirelessly or by wire.
  • Fig. 1 is only a schematic diagram, the communication system may also include other network devices, such as wireless relay devices and wireless backhaul devices, which are not shown in Fig. 1 .
  • the embodiments of the present application do not specifically limit the number of network devices and terminal devices included in the mobile communication system.
  • the network device may be an access device through which a terminal device wirelessly accesses a mobile communication system, and may be a base station (BS), for example: third generation (3G) communication Node B (NodeB) in the system, evolved NodeB (eNodeB) in long term evolution (LTE) communication system, base station gNodeB or gNB in 5G mobile communication system, base station in future mobile communication system Or an access node in a wireless-fidelity (wireless-fidelity, WiFi) system, etc.
  • BS base station
  • 3G third generation
  • NodeB evolved NodeB
  • LTE long term evolution
  • LTE long term evolution
  • base station gNodeB or gNB in 5G mobile communication system
  • base station in future mobile communication system
  • an access node in a wireless-fidelity (wireless-fidelity, WiFi) system etc.
  • the embodiments of the present application do not limit the specific technology and specific device form used by the access network device.
  • the terminal device may also be referred to as a terminal (terminal).
  • the terminal equipment can be user equipment (UE), mobile station (mobile station, MS), mobile terminal equipment (mobile terminal, MT), etc.
  • the terminal equipment can also be mobile phone (mobile phone), tablet computer (Pad), Computer with wireless transceiver function, virtual reality (VR) terminal equipment, augmented reality (AR) terminal equipment, wireless terminal equipment in industrial control (industrial control), unmanned driving (self driving) in Wireless terminal equipment, wireless terminal equipment in remote medical surgery, wireless terminal equipment in smart grid, wireless terminal equipment in transportation safety, wireless terminal equipment in smart city Terminal equipment, wireless terminal equipment in smart home, equipment in V2X (vehicle to everything) system, etc.
  • UE user equipment
  • MS mobile station
  • MT mobile terminal equipment
  • the terminal equipment can also be mobile phone (mobile phone), tablet computer (Pad), Computer with wireless transceiver function, virtual reality (VR) terminal equipment, augmented reality (AR) terminal equipment, wireless terminal equipment in industrial control (industrial control), unmanned driving (self driving) in Wireless terminal
  • sidelinks can be performed between the terminal equipment and the terminal equipment.
  • Road (sidelink, SL) communication The sidelink communication here may also be referred to as sidelink communication or sidelink communication.
  • Sidelink communication allows direct communication between terminal equipment and terminal equipment.
  • terminal equipment 1 can be used as the transmitting end of sidelink communication to send data to terminal equipment 2.
  • Terminal equipment The device 2 can receive the data sent from the terminal device 1 as the receiving end of the sidelink communication.
  • the network device does not directly participate in the sending of data from the terminal device 1 to the terminal device 2, that is, the data of the terminal device 1 does not pass through the network device, but directly reaches the terminal device 2 from the terminal device 1. , which realizes the direct end-to-end transmission of data.
  • sidelink communication can also provide a one-to-many sidelink communication mode, and the one-to-one and one-to-many sidelink communication can be divided into Communication with and without relay nodes.
  • FIG. 1 of the present application only uses one-to-one communication in sidelink communication as an example, and there is no limitation on the number of terminal devices and whether a relay node is included during sidelink communication.
  • FIG. 2 is a schematic diagram of a vehicle to everything (V2X) scenario applied in this application.
  • V2X vehicle to everything
  • the vehicle can pass on the vehicle
  • the V2X communication device is set for communication.
  • the V2X communication device set on each vehicle can be used as a terminal device as shown in FIG. 1 .
  • the vehicle in the figure can communicate with other vehicles in vehicle-to-vehicle (V2V), communicate with other pedestrians in vehicle-to-pedestrian (V2P), and communicate with other roadsides.
  • V2V vehicle-to-vehicle
  • V2P vehicle-to-pedestrian
  • V2I vehicle-to-infrastructure
  • V2N vehicle-to-network
  • V2X communication can realize all-round connection and efficient information exchange between vehicles and pedestrians, other vehicles, roadside equipment, and networks, and realize functions such as information services, traffic safety, and traffic efficiency.
  • functions that vehicles can achieve through V2X communication devices are becoming more and more abundant.
  • V2X communication devices can obtain various information services through V2I and V2N communication, including traffic light information, Vehicle information in nearby areas, vehicle navigation information, emergency rescue information, entertainment service information, etc.; V2X communication device can obtain real-time information such as speed, location, driving situation and pedestrian activities of surrounding vehicles through V2V and V2P communication, and realize collision through intelligent algorithms Early warning function to avoid traffic accidents; V2X communication device can realize functions such as speed guidance through V2I communication to improve traffic efficiency.
  • FIG. 2 is a schematic diagram of a time slot structure used by a V2X communication device for sidelink communication in a communication system, and the communication system may be, for example, a new radio (NR) communication system.
  • NR new radio
  • the time slot structure of V2X is under the standard cyclic prefix (normal cyclic prefix, NCP), one time unit (slot, slot) may include 14 symbols, and one time slot is used for bearing for sidelinks
  • the number of symbols of a physical sidelink control channel (pysical sidelink control channel, PSCCH) for communication may be configured on each resource pool, and may be 2 or 3 specifically.
  • symbol 2-symbol 3 may be used to carry PSCCH.
  • the number of candidate physical resource blocks (physical resource blocks) PRBs of the PSCCH can also be configured for each resource pool.
  • the PSCCH is carried in the sub-channel, and the PSCCH carries the first-level sidelink control information (sidelink control information). , SCI).
  • sidelink control information sidelink control information
  • SCI sidelink control information
  • the first symbol in each time slot can be used for automatic gain control (AGC)
  • the last symbol is the guard interval
  • the remaining symbols can be used to transmit data and the second-level SCI.
  • the V2X communication device may also support sidelink communication by means of unicast and multicast, and the communication system may be, for example, an NR communication system.
  • the communication system may be, for example, an NR communication system.
  • HARQ hybrid automatic repeat request
  • the HARQ technology combines FEC and ARQ, and after encoding the data block (or called transport block (TB)), the sender sends information bits and a part of redundant bits during the first transmission. If the receiving end can decode correctly, the receiving end feeds back an ACK signal to the transmitting end, and after the transmitting end confirms that the receiving end has successfully received the corresponding information bits, it can be considered that the sent TB has been successfully transmitted. If the receiving end cannot decode correctly, the receiving end feeds back a NACK to the sending end, and then the sending end further transmits a part of the information bits and/or redundant bits to the receiving end.
  • TB transport block
  • This process can be called data retransmission; when the receiving end After receiving the retransmitted data, it is combined with the previously received data and then decoded. If the redundant bits of the retransmitted data still cannot be decoded normally, the retransmission is performed again. With the increase of the number of retransmissions, the redundant bits are continuously accumulated, and the channel coding rate is continuously reduced, so that a better decoding effect can be obtained.
  • FIG. 4 is a schematic diagram of a time slot structure used by another V2X communication device for sidelink communication.
  • a The PSFCH format of the sequence which can be used to carry 1-bit ACK or NACK, or just NACK.
  • the PSFCH resource may be periodically configured on the resource pool, the configuration period of the PSFCH resource may be N time slots, and N may be 0, 1, 2 or 4.
  • the time interval between the physical sidelink shared channel (PSSCH) and the PSFCH (timing of feedback) it can be defined as: assuming that the last symbol of a PSSCH transmission is in time slot n, which is the same as the time slot n.
  • the HARQ information corresponding to the data carried by the PSSCH may be in n+a time slots, where a is the smallest positive integer greater than or equal to K, and K is the smallest time interval between PSSCH and PSFCH, which may be 2 or 3.
  • the terminal equipment can use legal and appropriate communication resources or communication methods to carry out sidelink communication, so as to improve the sidelink communication efficiency of the terminal equipment, and avoid the resources used by the terminal equipment in the sidelink communication.
  • Other terminal equipment or other communication methods cause interference.
  • mode 1 There are two ways to obtain resources in the sidelink, mode 1 and mode 2. Wherein, in mode 1, the terminal device obtains resources by sending request information to a network device such as a base station. In mode 2, the terminal device autonomously determines resources, and the resource selection method includes sensing, partial sensing or random selection.
  • the terminal device serving as the transmitting end determines the communication resources for sidelink communication due to some reasons, the interference is relatively large, and the reliability of data transmission cannot be guaranteed.
  • the terminal device does not detect the resources occupied by the hidden node when sensing, but the terminal device as the receiving end can detect the resources occupied by the hidden node, so the reliability of the data transmission is reduced, and the occurrence of The probability of transmission collisions increases.
  • the terminal device cannot determine the communication resource due to power saving, for example, the terminal device cannot determine the communication resource by means of perception. Therefore, in order for the terminal device to still be able to perform sidelink communication, and to ensure the reliability of data transmission.
  • a terminal device can request other terminal devices to provide resource assistance information to the terminal device by sending auxiliary resource request information to other terminal devices, so that the terminal device can, according to the resource assistance information provided by other terminal devices, Determine its communication resources for sidelink communication, and finally can perform sidelink communication.
  • FIG. 5 is a schematic diagram of a terminal device performing sidelink communication, wherein, when performing sidelink communication, the terminal device that sends data is UE1, and the terminal device that receives data from UE1 is UE2.
  • UE2 performs sidelink communication, and sends a request for resource assistance information to UE3 in S10.
  • the UE3 may be the nearest device around UE2, a UE of the same type and parameters as UE1, or UE2 itself. This application does not limit the specific implementation of UE3, as long as it can provide resource assistance information for UE1, it can be used as UE3.
  • UE1 receives the resource assistance information sent by UE3 in S20, and uses the received resource assistance information as a reference in S30 to determine the communication resources used by UE1 during sidelink communication (actually, UE3 may or may not be used) resource assistance information sent). Finally, UE1 can use the determined communication resource to send data to UE2 at S40 for sidelink communication.
  • UE1 after UE1 sends a request for resource assistance information to UE3 through S10, if UE3 does not receive the request, or UE3 cannot provide UE1 resource assistance information, or UE3 refuses to be When the UE1 provides the resource assistance information, the UE1 cannot receive the resource assistance information through S20. At this time, UE1 either repeatedly sends the request to UE3 or continues to wait for a long time before giving up acquiring resource assistance information from UE3, and continues to determine the communication resources by other means. In this process, the request sent by UE1 to UE3 is meaningless, and also increases the time delay for UE1 to determine the communication resources used in sidelink communication, thereby reducing the communication efficiency when UE1 performs sidelink communication.
  • the present application provides a communication method and apparatus.
  • the terminal device in sidelink communication can, according to the feedback of the terminal device receiving the resource assistance information, Determine whether it can provide resource assistance information, so as to not only ensure the reliability of the data to be transmitted, but also reduce the delay of the terminal equipment performing sidelink communication when the terminal equipment receiving the resource assistance information cannot provide the resource assistance information. , thereby improving the communication efficiency when the terminal device performs sidelink communication.
  • FIG. 6 is a schematic flowchart of an embodiment of a communication method provided by the present application, wherein the method shown in FIG. 6 can be applied to the scenario of sidelink communication between terminal devices as shown in FIG. 1 .
  • a terminal device that sends data during sidelink communication is recorded as a first device
  • a terminal device that receives data during sidelink communication is recorded as a third device.
  • the method provided by this embodiment includes:
  • the first device sends first information to the second device, where the first information is used to request resource assistance information from the second device; correspondingly, the second device receives the first information sent from the first device.
  • the first device before the first device performs sidelink communication, that is, before sending sidelink communication data to the third device, it first needs to determine available communication resources, including: time domain resources, frequency domain resources, and time-frequency resources Wait.
  • the first device may request resource assistance information from the second device, and after the second device sends the resource assistance information to the first device, the first device may refer to the received resource assistance information to determine the communication resource.
  • the second device may be any device that can provide resource assistance information to the first device, for example, another terminal device located near the third device.
  • the requesting resource auxiliary information may be understood as requesting resource information, requesting time-frequency resource information, requesting time-domain resource information, or requesting frequency-domain resource information. Requesting can be understood as obtaining, obtaining, and obtaining, which is not limited in the present invention.
  • the resource assistance information may be understood as time-frequency resource information, resource information, time-domain resource information, or frequency-domain resource information.
  • the first device may send first information to the second device to request resource assistance information during sidelink communication, and in this case, the second devices sent each time may be the same or different.
  • the first device may not be able to obtain reliable communication resources because it is a hidden node, or, due to power saving, choose to send a request for resource assistance information to obtain resources, etc., the first device cannot be directly Determining the communication resources by itself, or directly determining the communication resources by the first device itself cannot guarantee the reliability of data transmission. Then the terminal device can send the first information to the second device.
  • the first information may be carried in control signaling sent by the first device to the second device, and the control signaling may be sidelink control information (SCI) or in MAC CE.
  • the SCI can be a first-level SCI or a second-level SCI.
  • the first information may be a bit in the SCI, that is, a bit in the SCI is used to indicate whether the first device requests resource assistance information from the second device.
  • the PSSCH scheduled by the SCI may also carry one or more of the following parameters: priority, used resource pool, remaining data delay (packet delay budget, PDB), number of subchannels, and reservation period, etc.
  • the priority may be the priority of the data sent by the first device to the third device; the resource pool used may be a common resource pool of the first device and the third device for sidelink communication; the remaining PDB may be one Time window, the first device expects to receive resource assistance information within this time window; the number of subchannels is the frequency domain granularity of the selected resources used for sensing; the reservation period is the service type to be sent by the first device , including aperiodic, periodic, or period length, etc.
  • the first information may also be the SCI sent by the first device to the second device.
  • the SCI is a new SCI format.
  • This SCI format is dedicated to requesting auxiliary resource information.
  • the fields carried in the SCI format include: one or more of the following parameters: priority, used resource pool, remaining PDB, number of subchannels, reservation period, and the like.
  • the SCI may be a first-level SCI or a second-level SCI.
  • the second device sends second information to the first device, where the second information is used to instruct the second device to provide resource assistance information for the first device, or the second information is used to indicate that the second device is not the first device Resource assistance information is provided; correspondingly, the first device receives the second information sent by the second device, so that the first device can determine whether the second device provides resource assistance information for the first device according to the second information.
  • the second device after receiving the first information sent by the first device, the second device can send the first device in S102 regardless of whether the resource assistance information can be provided for the first device or not.
  • second information For example, if the second device determines that it can provide resource assistance information for the first device, the second information sent by the second device in S102 instructs the second device to provide resource assistance information for the first device; the second device determines that it cannot provide the first device with the resource assistance information; If resource assistance information is provided, the second information sent by the second device in S102 indicates that the second device does not provide resource assistance information for the first device. Then, for the first device, after receiving the second information, it may be determined whether the second device can provide resource assistance information for the first device according to the second information.
  • the second information provided in this embodiment may be carried by the PSFCH, and the correspondence between the second information and the sequence cyclic shift value of the PSFCH is shown in Table 1 below:
  • second information Indicates to provide resource assistance information Indicates that no resource assistance information is provided sequence cyclic shift value 6 0
  • the two results "Yes” and “No” may respectively correspond to the sequence cyclic shift value of the PSFCH two values of .
  • the second information indicates that the second device provides resource assistance information for the first device
  • the second information corresponds to the first sequence cyclic shift value "6" of the PSFCH
  • the first device When the cyclic shift value of the sequence of the PSFCH is received as 6, it is determined that the second device provides resource assistance information for the first device.
  • the second information indicates that the second device does not provide resource assistance information for the first device
  • the second information corresponds to the second sequence cyclic shift value of the PSFCH "0"
  • the sequence cyclic shift value of the PSFCH received by the first device is When it is 0, it is determined that the second device does not provide resource assistance information for the first device.
  • the second information when the second information indicates that the second device provides resource assistance information for the first device, the second information corresponds to the first sequence cyclic shift value "0" of the PSFCH;
  • the information indicates that the second device does not provide resource assistance information for the first device, and the second information corresponds to the second sequence cyclic shift value "6" of the PSFCH.
  • second information Indicates to provide resource assistance information Indicates that no resource assistance information is provided sequence cyclic shift value 0 6
  • the resource bearing the second information may be the PSFCH resource in the first resource set, wherein the resource set used for transmitting the PSFCH resource bearing the second information is the first resource set, and the resource set is denoted as the first resource set.
  • the resource set for transmitting the PSFCH resource bearing the HARQ-ACK is the second resource set.
  • the first resource set and the second resource set are complementary sets of each other.
  • the second device since the second device can not only send the second information to the first device through the PSFCH, but also can send the HARQ information to the first device through the PSFCH, in this embodiment, the second device uses the PSFCH resources to divide the resources of the different resource sets.
  • the PSFCH carrying the second information and the PSFCH carrying the HARQ-ACK are distinguished, so as to distinguish the HARQ information and the second information sent by the second device.
  • the first resource set and the second resource set may use different bitmaps
  • bitmap to represent. That is, the network device uses different bitmaps to independently configure the first resource set and the second resource set. Wherein, the different bitmaps may be of the same length.
  • Table 3 shows a bitmap corresponding to a resource set indicating a PSFCH resource used to transmit the second information
  • Table 4 shows a corresponding bitmap indicating a resource set used to transmit the PSFCH resource carrying HARQ information. Bitmap.
  • the frequency domain is 10 resource blocks (resource block, RB), the RB can be a physical resource block (physical resource block, PRB), the time domain is 6 time slots , and the PSFCH resource period is 2, that is, there is a PSFCH resource in one time slot in every two time slots.
  • the illustrated parameters are not limited in the present invention.
  • the resource set used to transmit the PSFCH resource carrying the second information can be indicated by "000011” in the bitmap in Table 3, and the PSFCH used to transmit the HARQ information can be indicated by "111100” in the bitmap in Table 4
  • the resource set of resources it can be seen that in each of the time slots n+1, n+3 and n+5, the PSFCH resources carrying the second information and the PSFCH resources carrying the HARQ information are complementary sets of each other.
  • the above-mentioned first resource set and second resource set may be indicated by a bitmap (bitmap) indicating the two resource sets. That is, the network device uses the bitmap to jointly configure the first resource set and the second resource set.
  • bitmap bitmap
  • Table 5 shows a bitmap corresponding to a resource set indicating a PSFCH resource that is used to transmit HARQ information.
  • Table 5 is a schematic diagram
  • the frequency domain is 10 RBs
  • the time domain is 6 time slots
  • the PSFCH resource period is 2, that is, there is a PSFCH resource in one time slot in every 2 time slots.
  • the illustrated parameters are not limited in the present invention.
  • "111100" in the bitmap in Table 5 indicates the resource set used to transmit the PSFCH resources carrying HARQ information. Since the first resource set and the second resource set are complementary sets, the The resource set of the PSFCH resource is the resource set corresponding to the position indicated as "0" in the bitmap in Table 5. It can be seen that in each of the time slots n+1, n+3 and n+5, The PSFCH resources that carry the second information and the PSFCH resources that carry the HARQ information are complementary sets of each other.
  • the first resource set and the second resource set may be represented by different bitmaps. That is, the network device uses different bitmaps to independently configure the first resource set and the second resource set.
  • the different bitmaps are of different lengths. Denote the bitmap corresponding to the first resource set as the first bitmap, and the bitmap corresponding to the second resource set as the second bitmap. The length of the first bitmap should be less than or equal to the resource block RB indicated as 0 in the second bitmap.
  • Table 6 shows a bitmap corresponding to a resource set indicating a PSFCH resource used for transmitting the second information
  • Table 7 shows a corresponding bitmap indicating a resource set used for transmitting a PSFCH resource carrying HARQ information Bitmap.
  • Table 6 and Table 7 are a simplified diagram
  • the frequency domain is 10 RBs
  • the time domain is 6 time slots
  • the PSFCH resource period is 2, that is, one time slot in every 2 time slots has PSFCH resources.
  • the illustrated parameters are not limited in the present invention.
  • the resource set used to transmit the PSFCH resources carrying the second information can be indicated by "11” in the bitmap in Table 6, and the PSFCH used to transmit the HARQ information can be indicated by "111100" in the bitmap in Table 7
  • the resource set of resources it can be seen that in each of the time slots n+1, n+3 and n+5, the PSFCH resources carrying the second information and the PSFCH resources carrying the HARQ information are complementary sets of each other.
  • the first device sends the first information to the second device in the first time slot
  • the second device sends the second information to the first device in the second time slot.
  • the relative relationship between the first time slot and the second time slot may satisfy at least the following conditions, and the second time slot is the first time slot including the PSFCH after the time slot where the last symbol of the first information is located;
  • the time slot, or the second time slot may be the first time slot including the PSFCH after the first time slot and after an interval of N time units, where N is a positive integer.
  • the time slot shown in FIG. 3 may be a time slot not including a PSFCH
  • the time slot shown in FIG. 4 may be a time slot including a PSFCH.
  • the second device sends the second information to the first device, which is used to indicate whether the second device provides resources for the first device Supplementary information.
  • the second device provides resource assistance information for the first device here can be understood that the second information can be used to instruct the second device to provide resource assistance information for the first device or the second information can also be used to indicate that the second device is not the first device.
  • the device provides resource assistance information. This enables the first device to determine whether the second device can provide resource assistance information according to the indication of the second information fed back by the second device.
  • the first device can at least determine according to the second information: 1
  • the second device has received the first information, thereby ensuring the reliability of the second information sent by the first device.
  • the terminal device has been waiting for the second device to provide resource assistance information, which reduces the delay of data transmission, improves the communication efficiency and transmission reliability when the first device performs side link communication, and also improves spectrum utilization. .
  • the second information sent by the second device to the first device is given in a specific implementation manner, that is, the second information may indicate that the second device is the first device
  • the device provides resource assistance information, and may also instruct the second device not to provide resource assistance information for the first device, which is referred to as the first implementation manner.
  • the second information may only be used to instruct the second device to provide resource assistance information for the first device, and not be used to instruct the second device not to provide resource assistance information to the second device.
  • FIG. 7 is a schematic flowchart of an embodiment of a communication method provided by this application.
  • the method shown in FIG. 7 in addition to the correspondence between the second information and the sequence cyclic shift value of the PSFCH shown in Table 8 below, other implementations The same as that shown in FIG. 6 can be understood as an equivalent replacement for the embodiment shown in FIG. 6 .
  • the second information provided in this embodiment may be carried by the PSFCH, and the correspondence between the second information and the sequence cyclic shift value of the PSFCH is shown in Table 8 below:
  • Second information Indicates to provide resource assistance information Indicates that no resource assistance information is provided sequence cyclic shift value 6 N/A
  • the second information instructs the second device to provide resource assistance information for the first device, which corresponds to a value of a sequence cyclic shift value of the PSFCH.
  • the second information when the second information indicates that the second device provides resource assistance information for the first device, the second information corresponds to the third sequence cyclic shift value "6" of the PSFCH; the first device receives When the sequence cyclic shift value of the PSFCH is 6, it is determined that the second device provides resource assistance information for the first device. The first device does not receive the PSFCH bearing the second information, and determines that the second device does not provide resource assistance information for the first device. Therefore, compared with Table 1 and Table 2 in the first embodiment, the implementation shown in Table 8 changes the definition of the second information, is more efficient than Table 1 and Table 2, and reduces the transmission rate of the second device. The amount of information increases the efficiency of system communication.
  • the resource carrying the second information may be the PSFCH resource in the first resource set as an example, in another possible implementation manner, in S102 shown in FIG. 6 , the second information sent by the second device to the first device may also be transmitted in a new PSFCH format.
  • the new PSFCH format can carry multiple bits.
  • the plurality of bits may be used to indicate the second information and the HARQ information. That is, the second information may be used to indicate whether the second device provides resource assistance information to the first device and whether the data sent by the first device is successfully received. That is to say, in this embodiment, multiple bits can indicate both the second information and the HARQ information, so the second device can distinguish between the HARQ information and the second information sent by the second device without using different resources. .
  • the correspondence between these multiple bits, the second information, and the HARQ information may be as shown in Table 9 below:
  • the present invention does not limit the corresponding relationship between the bit value and the HARQ information plus the second information.
  • the correspondences in Table 9 may also be other correspondences. As shown in Table 9, when the value of the 2 bits of the PSFCH is 00, it corresponds to the NACK+ (add or sum) indication that no resource assistance information is provided, that is, the second device fails to receive the PSSCH scheduled by the PSCCH, and the second device fails to receive the PSSCH scheduled by the PSCCH.
  • the second device does not provide resource assistance information for the first device; when the value of the 2 bits of the PSFCH is 01, it corresponds to the NACK+ (add or sum) indication to provide resource assistance information, that is, the second device does not successfully receive the PSCCH scheduling PSSCH, and the second device provides resource assistance information for the first device; when the value of the 2 bits of the PSFCH is 11, it corresponds to the ACK+ (add or sum) indication to provide resource assistance information, that is, the second device successfully Receive the PSSCH scheduled by the PSCCH, and the second device provides resource assistance information for the first device; when the value of the 2 bits of the PSFCH is 10, it corresponds to ACK+ (add or sum) indicating that no resource assistance information is provided, that is, The second device successfully receives the PSSCH scheduled by the PSCCH, and the second device does not provide resource assistance information for the first device.
  • the second information sent by the second device to the first device may also be transmitted using the PSFCH.
  • the PSFCH may carry 1 bit, and use different PSFCH sequence cyclic offset values to indicate the second information and the HARQ information. That is, 1 bit and the sequence cyclic shift of the PSFCH are used to indicate that the second device provides resource assistance information for the first device and whether the data sent by the first device is successfully received. That is to say, in this embodiment, the PSFCH can indicate both the second information and the HARQ information, so the second device can distinguish between the HARQ information and the second information sent by the second device without using different resources.
  • the second information corresponds to 1 bit in the PSFCH.
  • the correspondence between the cyclic offset of the PSFCH sequence, the second information, and the HARQ information can be as shown in Table 10 below. :
  • the resource assistance information is provided corresponding to the NACK+ indication, that is, the second device does not successfully receive the PSSCH scheduled by the PSCCH, and the second device provides resource assistance for the first device information;
  • the resource assistance information is provided corresponding to the ACK+ indication, that is, the second device successfully receives the PSSCH scheduled by the PSCCH, and the second device provides the first device with the resource assistance information. That is, the sequence cyclic shift value is used to indicate whether the second device provides resource assistance information for the first device, and whether the second device successfully receives data from the first device.
  • the first device sends the first information to the second device in the first time slot
  • the second device sends the second information to the first device in the second time slot
  • the first time slot and the The relative relationship between the second time slots may at least satisfy the following conditions: the second time slot is the first time slot including the PSFCH after the first time slot plus the time interval of M time units, and the feedback time interval Configured on the resource pool, M is a positive integer. M can be 2 or 3, and the time slot can be a logical time slot in the resource pool.
  • the second information may be carried in a resource set for transmitting PSFCH resources, that is, the PSFCH carrying the second information may use the time domain position and frequency domain position of the PSSCH to be implicitly associated to determine the position of the PSFCH.
  • the PSFCH carrying the second information may use the time domain position and frequency domain position of the PSSCH to be implicitly associated to determine the position of the PSFCH.
  • Frequency domain and/or code domain resources are briefly described below.
  • a device (or called terminal device, UE) will be provided with one of the resource pools A set of PRBs, and the UE performs PSFCH transmission on one PRB in this set.
  • the number of sub-channels in the resource pool is denoted as N subch
  • the number of PSSCH time slots associated with this PSFCH time slot is UE for slot i and sub-channel j from Allocated among PRBs PRBs. in, And this allocation starts from the ascending order of i, and continues to traverse in the ascending order of j after the traversal of i.
  • UE expects Yes multiples of .
  • a UE according to the formula Determine the number of resources available to transmit the PSFCH.
  • PRBs are associated with the starting subchannel of the corresponding PSSCH, but One or more corresponding PRBs and PSSCHs subchannels are associated. It is configured on the resource pool.
  • the PSFCH resource is first stored in the PRB according to the index sort the PRBs in ascending order, and then start The cyclic offset pairs are sorted in ascending order according to the cyclic offset index.
  • a UE according to An index of a PSFCH resource is determined, wherein the PID is the physical layer source ID provided in the second-level SCI, and the M ID is 0 or the identity indicated by the higher layer of the UE receiving the PSSCH.
  • the second device may send the second information to the first device to indicate whether the second device provides resource assistance information for the first device.
  • the second information is used to instruct the second device to provide resource assistance information for the first device.
  • the first device can determine whether the second device can provide resource assistance information according to the second information fed back by the second device, thereby reducing the delay caused by the terminal device waiting for the second device to provide the resource assistance information, thereby improving the Communication efficiency when a device communicates on the sidelink.
  • the second device in this embodiment can use the existing PSFCH format to the maximum extent, improve resource utilization, and modify the existing PSFCH by indicating the second information and HARQ information at the same time through the PSFCH sent to the first device. Less, more conducive to realization and promotion.
  • the second information sent by the second device to the first device may be borne by the PSFCH, and in other possible implementations, the second information may also be borne by a newly defined The channel (referred to as the first channel) is carried.
  • the newly defined first channel may be named (a new sidelink respond channel, PSRCH), etc. This embodiment does not limit the name of the newly defined first channel, and it can be used to carry the second information in function. .
  • second information Indicates to provide resource assistance information Indicates that no resource assistance information is provided
  • the two results of whether the second device indicated by the second information provides resource assistance information for the first device can respectively correspond to the values of the second information 1 and 0, and can respectively correspond to the PSRCH Two values of the sequence cyclic shift value of .
  • the mapping between the second information and the value of the second information, and the mapping relationship between the second information and the sequence cyclic shift value are not limited.
  • the second information when the second information indicates that the second device provides resource assistance information for the first device, the second information corresponds to the first sequence cyclic shift value "6" of the PSRCH; the first device When the cyclic shift value of the sequence of the PSRCH is received as 6, it is determined that the second device provides resource assistance information for the first device.
  • the second information indicates that the second device does not provide resource assistance information for the first device, the second information corresponds to the second sequence cyclic shift value of the PSRCH "0"; the sequence cyclic shift value of the PSRCH received by the first device is When it is 0, it is determined that the second device does not provide resource assistance information for the first device.
  • the first device sends the first information to the second device in the first time slot
  • the second device sends the second information to the first device in the second time slot.
  • the relative relationship between the first time slot and the second time slot may satisfy at least the following conditions, and the second time slot is the first time slot including the PSRCH after the time slot where the last symbol of the first information is located.
  • Time slot, or, the second time slot may be the first time slot after the first time slot, after an interval of P time units, including the PSRCH, where P is a positive integer, and the time unit may be a time slot or other A time unit for measuring time, which is not limited in the present invention.
  • the time slot may be a logical time slot in the resource pool.
  • the resources bearing the second information may specifically be PSRCH resources in the third resource set.
  • the resource set used for transmitting the PSRCH resources carrying the second information is denoted as the third resource set
  • the resource set used for transmitting the PSRCH resources carrying the HARQ-ACK is denoted as the fourth resource set.
  • the third resource set and the fourth resource set are complementary sets to each other.
  • the second device since the second device can not only send the second information to the first device through the PSRCH, but also can send the HARQ information to the first device through the PSFCH, in this embodiment, the second device divides different resource sets into Distinguish the PSRCH carrying the HARQ information and the PSRCH carrying the second information sent by the second device.
  • the above-mentioned third resource set and fourth resource set can be represented by a bitmap.
  • the third resource set and the fourth resource set can be configured by two independent bitmaps, respectively.
  • the PSRCH resource carrying the second information is indicated by "000011" in the bitmap
  • the PSFCH resource carrying HARQ information is indicated by "111100" in the bitmap. It can be seen that in a single time slot, the PSRCH carrying the second information is The resources and the PSFCH resources carrying HARQ information are complementary sets to each other.
  • the third resource set and the fourth resource set can be jointly configured through a bitmap.
  • the resource set of the PSRCH resource of the information is the resource set corresponding to the position indicated as "0" in the bitmap "111100". It can be seen that in a single time slot, the PSRCH resource carrying the second information and the PSFCH resource carrying the HARQ information are complementary sets of each other. Alternatively, in a third specific implementation, the third resource set and the fourth resource set may be configured through two independent bitmaps with different lengths, respectively. For example, the PSFCH resource carrying HARQ information is indicated by the bitmap "111100", and the PSRCH resource carrying the second information is indicated by the bitmap "11", where the bitmap "11" is specifically in the PSFCH resource carrying HARQ information. In the complementary set of , indicates the PSRCH resource that carries the second information.
  • FIG. 8 is a schematic diagram of a time slot structure.
  • the configured PSRCH may occupy the last symbol of the resource pool except the GP, which is the penultimate PSFCH in the figure, and repeats a symbol.
  • the set of resources used to transmit PSRCH and the set of resources used to transmit PSFCH are independently configured, and the configuration mode of frequency division multiplexing is adopted, then in the time slot as shown in FIG. 8, when the configuration period of PSFCH is 1, 2 and 4, the configuration period of the PSRCH is equal to the configuration period of the PSFCH.
  • the configuration period of the PSFCH is 0, the configuration period of the PSRCH is 0, 1, 2 or 4, and can also be other values, which is not done in the present invention. limited.
  • second information Indicates to provide resource assistance information Indicates that no resource assistance information is provided
  • the value of the second information 1 0 sequence cyclic shift value 6 N/A
  • the second device indicated by the second information provides resource assistance information for the first device, which may independently correspond to a value of a sequence cyclic shift value of the PSRCH.
  • the second information when the second information indicates that the second device provides resource assistance information for the first device, the second information corresponds to the third sequence cyclic shift value "6" of the PSRCH; the first device receives When the sequence cyclic shift value of the PSRCH is 6, it is determined that the second device provides resource assistance information for the first device. When the first device does not receive the PSRCH, it is determined that the second device does not provide resource assistance information for the first device.
  • the first channel carrying the second information may be a PSFCH or a PSRCH or the like.
  • the first channel may also be PSCCH
  • the second information may be carried by PSCCH, that is, the second information is 1 bit in the first-level SCI, and the 1 The bit is a field for instructing the second device to provide resource assistance information for the device, or for instructing the second device not to provide resource assistance information for the first device.
  • the 1 bit may be the 1 bit with the smallest LSB among the reserved bits in the first level SCI, or the 1 bit may be the 1 bit with the largest MSB among the reserved bits in the first level SCI.
  • the first channel may also be PSSCH
  • the second information may be carried by PSSCH, that is, the second information is 1 bit in the second-level SCI, and the 1 bit is a field used for Instructing the second device to provide resource assistance information for the device, or instructing the second device not to provide resource assistance information for the first device.
  • the 1 bit may be the 1 bit with the smallest LSB among the reserved bits in the second level SCI, or the 1 bit may be the 1 bit with the largest MSB among the reserved bits in the second level SCI.
  • the second information may be indicated by a first sequence, and the second information may be indicated by one or more of the following sequence parameters: cyclic shift value of the sequence, sequence The sequence number, the orthogonal cover code (OCC) of the sequence.
  • the first sequence may include a sequence of reference signals, and the reference signals include one or more of DMRS (demodulation reference signal) of PSSCH, DMRS of PSCCH, PTRS (phase tracking reference signal), and CSI-RS (channel state information reference signal).
  • the first sequence may also include a sequence used for transmitting the first channel, that is, the first sequence may be a sequence used for transmitting the PSFCH, or the first sequence may be a sequence used for transmitting the PSRCH.
  • the second information may be indicated by a MAC CE (medium access control control element).
  • the MAC CE can be used to carry resource assistance information.
  • the second information may be 1 bit in the MAC CE.
  • the MAC CE carries the resource assistance information, it means that it agrees to provide the resource assistance information.
  • the MAC CE carries resource auxiliary information and determines one or more of the parameters such as the priority used for perception, the number of sub-channels, the resource pool used, the reservation period, the number of times of reserving resources, etc. used for determining the resource auxiliary information. parameter.
  • FIG. 6A is a schematic flowchart of an embodiment of a communication method provided by the present application.
  • FIG. 6A can be used as an equivalent replacement for the embodiment shown in FIG. 6 , that is, in the embodiment shown in FIG.
  • FIG. 7A is a schematic flowchart of an embodiment of a communication method provided by this application; FIG. 7A can be used as an equivalent replacement for the embodiment shown in FIG. 7 , that is, in the embodiment shown in FIG. 7A , the first device In the case where S101 is not performed, the second device may send the second information to the first device, and the specific implementation of S102 is the same as that shown in FIG. 7 , and details are not repeated here.
  • the second device feeds back the second information to the first device to indicate whether to provide the first device
  • the process of resource assistance information, or the process of the second device feeding back second information to the first device to instruct the first device to provide resource assistance information, and after that, the subsequent actions performed by the first device are also consistent with the second information. specific instructions. The following describes the steps after the first device receives the second information through Embodiments 6 to 8 with reference to the accompanying drawings.
  • FIG. 9 is a schematic flowchart of an embodiment of a communication method provided by the present application, which shows that on the basis of the above-mentioned Embodiments 1 to 5, when the second information sent by the second device to the first device in S102 is used After instructing the second device to provide resource assistance information for the first device, the method further includes:
  • S103 The second device sends resource assistance information to the first device.
  • the first device refers to the resource assistance information sent by the second device, and determines the communication resources used when it performs sidelink communication with the third device.
  • the first device uses the communication resources determined in S104 to perform sidelink communication, and specifically may send sidelink communication data to the third device.
  • FIG. 10 is a schematic flowchart of an embodiment of a communication method provided by the present application, which shows that on the basis of the first embodiment, the third embodiment and the fourth embodiment, when the second device sends the first device to the first device in S102
  • the second information after instructing the second device not to provide resource assistance information for the first device, further includes:
  • the first device uses other methods to determine the communication resources used for sidelink communication.
  • the first device may determine the communication resource in other ways. For example, the first device can send the first information to the fourth device to request the fourth device to provide resource assistance information to the first device; or, the first device can also determine the communication by itself through sensing, partial sensing, or random selection. resource.
  • the communication resources may be understood as resources or time-frequency resources.
  • the first device performs sidelink communication using the communication resource determined in S203, and may send sidelink communication data to the third device.
  • the communication method provided in this embodiment enables the first device to determine the communication resources in other ways after determining according to the second information that the second device cannot provide the resource assistance information, thus eliminating the need for the prior art shown in FIG. 5 .
  • waiting to receive resource assistance information can reduce the time delay caused by the terminal device waiting for the second device to provide resource assistance information, thereby improving the communication efficiency when the first device performs sidelink communication.
  • FIG. 11 is a schematic flowchart of an embodiment of a communication method provided by this application, which shows that on the basis of the above-mentioned Embodiments 1 to 5, after the first device sends the first information to the second device in S101, it is assumed that the first In the scenario where the second device does not receive the first information, after S101, it further includes:
  • the information sent by the second device is not received within the first time period. That is, the information sent by the second device to determine whether to provide resource assistance for the first device or the information sent by the second device to determine whether to provide resource assistance for the first device is not received, which is equivalent to the first device being unable to determine the second device. Whether to provide resource assistance information for it.
  • the first device may not receive resource assistance information or time-frequency resource information from the second device within the first time period after sending the first information.
  • the first information may be SCI or MAC CE or PC5RRC, that is, it may be carried in PSCCH and PSSCH.
  • the SCI can be the first-level SCI or the second-level SCI.
  • the first device uses other methods to determine the communication resources used for sidelink communication.
  • the first device may continue to send the first information to the second device to prevent the second device from not receiving the first information; or, the first device may send the first information to the fourth device to request the fourth device to send the first information to the fourth device.
  • a device provides resource assistance information; alternatively, the first device can also determine the communication resources by means of sensing, partial sensing or random selection.
  • the first time period may be preconfigured, may be configured, may be predefined, may be prescribed, or may be designated by a user of the first device or the second device.
  • the first time period may be configured by the network device through the RRC layer or MAC CE, or may be configured by the first device through PC5RRC.
  • the first time period can ensure the delay of the sideline communication of the first device. Avoid the delay caused by waiting for resource auxiliary information for a long time.
  • the first information includes a first time period.
  • the first time period can ensure the delay of the sideline communication of the first device. Avoid the delay caused by waiting for resource auxiliary information for a long time.
  • the first device uses the communication resources determined in S302 to perform sidelink communication, and specifically may send sidelink communication data to the third device.
  • the first device can determine the communication resources in other ways when it does not receive the second information or resource assistance information within the first time period, instead of waiting for the second device's response, so that the delay can be reduced.
  • the second device provides resource assistance information to the first device after a long interval, and the resource assistance information at this time cannot be used by the first device to determine the communication resources.
  • the first device should determine to obtain resource assistance information in other ways after the first time period, so this embodiment can also ensure the delay requirement and reliability of data transmission, and improve the timeliness of resource assistance information.
  • the data to be sent needs to determine the communication resources for sidelink communication, and at this time, it will send the second information to the second device to request to obtain resource assistance information , and then determine the communication resources.
  • the first device may frequently request the same second device to obtain resource assistance information in a short period of time, and in order to reduce the communication overhead and signaling overhead caused by frequent signaling interactions, in a specific implementation of this embodiment , after the first device sends the first information to the second device for the first time, if the second information sent by the second device to the first device is used to instruct the second device to provide resource assistance information to the first device, the second device During the subsequent second time period, the second information may no longer be sent to the first device.
  • the specific implementation includes the following Embodiment 9 and Embodiment 10.
  • FIG. 12 is a schematic flowchart of an embodiment of a communication method provided by the present application.
  • the method shown in FIG. 12 shows that on the basis of the foregoing Embodiments 1 to 5, if the second device communicates with the first device in S102
  • the second information sent by the device is used to instruct the second device to provide resource assistance information for the first device, then after S102, it further includes:
  • connection relationship is a "virtual" relationship established after the first device receives the second information, and within the second time period, the first device The established connection relationship is maintained with the second device, and the second device can continue to provide resource assistance information to the first device.
  • S402 During the second time period, if the first device sends the first information to the second device and requests the second device to provide resource assistance information to the first device, the second device may not send the second information to the first device to Indicates that it can provide resource assistance information for the first device, but directly sends the resource assistance information to the first device through S403. It can be understood that, within the second time period, S402 and S403 can be repeatedly performed multiple times.
  • the second time period may be preconfigured, may be configured, may be predefined, may be prescribed, or may be designated by a user of the first device or the second device.
  • the second time period may be configured by the network device through the RRC layer or MAC CE, or may be configured by the first device through PC5RRC. The second time period avoids the signaling overhead caused by frequent signaling interactions and reduces the system overhead.
  • connection relationship established in S401 is disconnected between the first device and the second device. Since the connection relationship is "virtual", the disconnection relationship can be understood as the second time. After the segment, if the first device sends the first information to the second device again, requesting the second device to provide resource assistance information to the first device, the second device needs to send the A device sends the second message.
  • the communication method provided in this embodiment can, in the scenario where the first device continuously requests the second device for resource assistance information, after the second device only sends the second information to the first device, the two can pass the established connection relationship, when the first device sends the first information to the second device again in the second time period, the second device can directly provide resource assistance information to the first device without sending the second information, thereby reducing the number of first
  • the information exchange between the device and the second device further improves the communication efficiency.
  • FIG. 13 is a schematic flowchart of an embodiment of a communication method provided by the present application.
  • the method shown in FIG. 12 can be understood as an equivalent replacement of S402 to S403 in the method shown in FIG. 12 . That is to say, after the connection relationship is established between the first device and the second device in S401, the method further includes:
  • the second device periodically sends resource assistance information to the first device.
  • the second device may actively send the resource assistance information to the first device when the first device does not send the first information to request to obtain the resource assistance information.
  • the period of the periodic sending may be pre-configured, may be configured, may be pre-defined, may be prescribed, or may be designated by a user of the first device or the second device.
  • the first time period may be configured by the network device through the RRC layer or MAC CE, or may be configured by the first device through PC5RRC.
  • the first time period can ensure the delay of the sideline communication of the first device. Avoid the delay caused by waiting for resource auxiliary information for a long time.
  • the first information includes one or more pieces of information such as a period for periodically providing resource assistance information, an upper limit of the number of resources reserved for a transport block in a period, and the like.
  • the communication method provided in this embodiment can, in the scenario where the first device continuously requests resource assistance information from the second device, after the second device only needs to send the second information to the first device once, the two can pass the In the established connection relationship, the second device actively periodically sends resource assistance information to the first device, thereby further reducing the interaction of information between the first device and the second device, and improving the ability of the first device to request resource assistance from the second device.
  • the degree of intelligence of information and further improve the efficiency of communication.
  • connection relationship established between the first device and the second device can be understood as a "virtual" connection relationship of "requesting resources-providing resources", and the connection relationship continues
  • the time may be a time window or a timer (timer), and the total duration of the time window or the timer is the second time period.
  • the first device when the first device receives the second information from the second device, the second information is used to indicate that the second device can provide the first device with resource assistance information, the first device can start or activate a timer to control the above connection; for another example, when the first device receives the second information sent by the second device, and the second information is used to indicate that the second device can provide resource assistance information for the first device, the first device can keep that connection. Then, after the first device sends the first information to the second device within the activation time of the timer or the retention time of the time window, the second device does not need to send the second information to the first device.
  • the configuration of the time window may be implemented by using pre-configured pre-configured or by using the RRC layer configuration by the network device or by using the PC5-RRC configuration by the first device.
  • the time window may be carried in the first information, that is, the second information from the second device carries the time window information, indicating to the second device to wait to receive the second information from the second device time. It is guaranteed that the second device can send the second information within the time window. Guarantee the delay requirement of the data to be sent by the first device.
  • time length values of multiple time windows can be configured on one resource pool.
  • the first device may then use 1 bit in the first level SCI or the second level SCI to indicate one of the time length values for the multiple time windows.
  • the first device uses the priority in the first information to associate one of the time length values in the multiple time windows.
  • the priority in the first information is 8 levels, which are respectively represented by 1, 2, 3, 4, 5, 6, 7, and 8, wherein the lower the priority value, the higher the priority.
  • the time length value of the time window is A, B, C, D, A, B, C, D are all integers, and the unit is time slot, symbol or absolute time millisecond.
  • the mapping relationship between the priority and the time window can be: the priority value is 1-2, the time window is D; the priority value is 3-4, the time window is C; the priority value is 5-6, the time window The window is B; the priority value is 7-8, then the time window is A.
  • the first device may correspond to one of the time length values in the time window according to the PDB or the remaining PDB in the first information.
  • the time length value of the time window corresponding to the PDB/remaining PDB should be less than or equal to the time length value of the PDB/remaining PDB. In this case, the delay requirement for sending data by the first device can be guaranteed.
  • the time length value of the time window corresponding to the PDB/remaining PDB should be less than or equal to the time length value of the PDB/remaining PDB.
  • the time length value of the time window is the largest value among the time length values less than or equal to the PDB/remaining PDB.
  • the time length value of the time window satisfies the smallest value that is less than or equal to the time length value of the PDB/remaining PDB.
  • the time length value of the time window is the average value of the time length values less than or equal to the PDB/remaining PDB, and the average value is the algorithm average value.
  • connection relationship established between the first device and the second device during the second time period may be disconnected by means of signaling.
  • Fig. 14 is a schematic flowchart of an embodiment of the communication method provided by the application, which shows that in the embodiment shown in Fig. 12, after S401, when a connection relationship is established between the first device and the second device, then the second device
  • the device may send interruption information to the first device in S601, and after the first device receives the interruption information, in S602, the connection relationship established between the first device and the second device is disconnected. It can be understood that, after S602, if the first device sends the first information to the second device, the second device will feed back to the first device whether it is in any of the first to fifth embodiments of this application.
  • Resource assistance information can be provided or fed back to the first device that it can provide resource assistance information.
  • Fig. 15 is a schematic flowchart of an embodiment of the communication method provided by the present application, which shows that in the embodiment shown in Fig. 13, after S401, when a connection relationship is established between the first device and the second device, then the second device
  • the device may send interruption information to the first device in S701, or the first device may also send interruption information to the second device in S702.
  • S701 and S702 can be implemented alternatively.
  • the connection relationship established between the first device and the second device is disconnected.
  • the second device will feed back to the first device whether it can provide resource assistance information according to any one of Embodiments 1 to 5 of this application. .
  • the interrupt information described in Embodiment 12 and Embodiment 13 may be specifically indicated by 1 bit in the first-level SCI or the second-level SCI, for example, may be a field in the SCI, Or reserved bits (the position with the largest MSB of the reserved bit, or the position with the smallest LSB), or MAC CE (control element) signaling. Or RRC signaling, MAC signaling, MIB signaling, SIB signaling. Or PC5RRC signaling.
  • the communication methods provided by the embodiments of the present application have been introduced, and in order to implement the functions in the communication methods provided by the above embodiments of the present application, the first device and the second device serving as executive bodies may include hardware structures and/or software modules, to implement the above functions in the form of hardware structure, software module, or hardware structure plus software module. Whether one of the above functions is performed in the form of a hardware structure, a software module, or a hardware structure plus a software module depends on the specific application and design constraints of the technical solution.
  • FIG. 16 is a schematic structural diagram of an embodiment of a communication device provided in this application.
  • the communication device 1600 includes: a processing module 1601 and a communication module 1602 .
  • the communication apparatus shown in FIG. 16 can be used as the first device to perform the steps performed by the first device in any of the foregoing embodiments of the present application.
  • the communication module 1602 may be configured to receive second information from the second device; wherein the second information instructs the second device to provide resource assistance information for the first device.
  • the second information is used to instruct the second device to provide resource assistance information for the first device; or, the second information is used to indicate whether the second device provides resource assistance information to the first device.
  • the communication module 1602 is further configured to send first information to the second device, where the first information is used to request to obtain resource assistance information.
  • the second information is carried by the first channel.
  • the second information when the second information indicates that the second device provides resource assistance information for the first device, the second information corresponds to the first sequence cyclic shift value of the first channel; when the second information indicates that the second device is not the first The device provides resource assistance information, and the second information corresponds to the second sequence cyclic shift value of the first channel; or, when the second information instructs the second device to provide resource assistance information for the first device, the second information corresponds to the first The third sequence of cyclic shift values for the channel.
  • the first channel is a physical sidelink feedback channel PSFCH; the second information is carried in the first resource set; wherein, the first resource set is included in the resource set for transmitting PSFCH, and is used to carry the hybrid automatic repeater.
  • the first device sends the first information in the first time slot, and the first device receives the second information in the second time slot; wherein, the second time slot is the time slot after the time slot where the last symbol of the first information is located.
  • the first time slot of the PSFCH, or the second time slot is the first time slot including the PSFCH after the first time slot at an interval of N time units, where N is a positive integer.
  • the second information is carried in the resource set for transmitting the first channel; wherein, the set of resources used for transmitting the first channel and the set of resources used for transmitting PSFCH resources are frequency division multiplexed; or, used for transmitting the first channel
  • the set of channel resources and the set of resources used to transmit the PSFCH are independently configured.
  • the second information corresponds to multiple bits of the first channel, and the multiple bits are used to indicate whether the second device provides resource assistance information for the first device, and whether the second device successfully receives the first device. data sent.
  • the second information is carried in a set of transmission PSFCH resources; wherein, the set of transmission PSFCH resources is also used for the second device to send HARQ information to the first device.
  • the first device sends the first information in the first time slot, and the first device receives the second information in the second time slot; wherein, the second time slot is an interval of M time units after the first time slot.
  • M is a positive integer.
  • the communication module 1602 is further configured to send the first information to the fourth device; or the communication module 1602 is further configured to send the first information to the second device; or, the communication apparatus 1600 does not use the resource assistance information to determine the communication resource.
  • the communication module 1602 is further configured to receive resource assistance information sent by the second device at least once within the second time period.
  • the communication module 1602 is further configured to send the first information to the second device within the second time period; and receive the resource assistance information sent by the second device according to the first information.
  • the communication apparatus shown in FIG. 16 may also be used as a second device to perform the steps performed by the second device in any of the foregoing embodiments of the present application.
  • the communication module 1602 is configured to send the second information to the first device; wherein the second information instructs the second device to provide resource assistance information for the first device.
  • the second information is used to instruct the second device to provide resource assistance information for the first device; or, the second information is used to indicate whether the second device provides resource assistance information to the first device.
  • the communication module 1602 is further configured to receive first information from the first device, wherein the first information is used to request to obtain resource assistance information.
  • the second information is carried by the first channel.
  • the second information when the second information indicates that the second device provides resource assistance information for the first device, the second information corresponds to the first sequence cyclic shift value of the first channel; when the second information indicates that the second device is not the first The device provides resource assistance information, and the second information corresponds to the second sequence cyclic shift value of the first channel; or, when the second information instructs the second device to provide resource assistance information for the first device, the second information corresponds to the first The third sequence of cyclic shift values for the channel.
  • the first channel is a physical sidelink feedback channel PSFCH; the second information is carried in the first resource set; wherein, the first resource set is included in the resource set for transmitting PSFCH, and is used to carry the hybrid automatic repeater.
  • the second device sends the second information in the second time slot, and the second device receives the first information in the first time slot; wherein, the second time slot is the time slot after the last symbol of the first information.
  • the first time slot of the PSFCH, or the second time slot is the first time slot including the PSFCH after the first time slot at an interval of N time units, where N is a positive integer.
  • the second information is carried in the resource set for transmitting the first channel; wherein, the set of resources used for transmitting the first channel and the set of resources used for transmitting PSFCH resources are frequency division multiplexed; or, used for transmitting the first channel
  • the set of channel resources and the set of resources used to transmit the PSFCH are independently configured.
  • the second information corresponds to multiple bits of the first channel, and the multiple bits are used to indicate whether the second device provides resource assistance information for the first device, and whether the second device successfully receives the first device. data sent.
  • the second information is carried in a set of transmission PSFCH resources; wherein, the set of transmission PSFCH resources is also used for the second device to send HARQ information to the first device.
  • the second device sends the second information in the second time slot, and the second device receives the first information in the first time slot;
  • the second time slot is the first time slot including the PSFCH after M time units after the first time slot, where M is a positive integer.
  • the communication module 1602 is further configured to, within the second time period, send resource assistance information to the first device at least once.
  • the communication module 1602 is further configured to, within the second time period, receive first information sent from the first device; and send resource assistance information to the second device according to the first information.
  • each module of the above apparatus is only a division of logical functions, and may be fully or partially integrated into a physical entity in actual implementation, or may be physically separated.
  • these modules can all be implemented in the form of software calling through processing elements; they can also all be implemented in hardware; some modules can also be implemented in the form of calling software through processing elements, and some modules can be implemented in hardware.
  • the processing module may be a separately established processing element, or may be integrated into a certain chip of the above-mentioned device to be implemented, in addition, it may also be stored in the memory of the above-mentioned device in the form of program code, and a certain processing element of the above-mentioned device Call and execute the function of the above determined module.
  • each step of the above-mentioned method or each of the above-mentioned modules can be completed by an integrated logic circuit of hardware in the processor element or an instruction in the form of software.
  • the above modules may be one or more integrated circuits configured to implement the above methods, such as: one or more application specific integrated circuits (ASIC), or one or more microprocessors (digital) signal processor, DSP), or, one or more field programmable gate arrays (field programmable gate array, FPGA), etc.
  • ASIC application specific integrated circuits
  • DSP digital signal processor
  • FPGA field programmable gate array
  • the processing element may be a general-purpose processor, such as a central processing unit (central processing unit, CPU) or other processors that can call program codes.
  • these modules can be integrated together and implemented in the form of a system-on-a-chip (SOC).
  • SOC system-on-a-chip
  • the above-mentioned embodiments it may be implemented in whole or in part by software, hardware, firmware or any combination thereof.
  • software it can be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated.
  • the computer may be a general purpose computer, special purpose computer, computer network, or other programmable device.
  • the computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be downloaded from a website site, computer, server, or data center Transmission to another website site, computer, server, or data center is by wire (eg, coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (eg, infrared, wireless, microwave, etc.).
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that includes an integration of one or more available media.
  • the usable media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media (eg, DVDs), or semiconductor media (eg, solid state disks (SSDs)), and the like.
  • FIG. 17 is a schematic structural diagram of an embodiment of a communication device provided by the present application, and the communication device can be used as the first device or the second device in any of the foregoing embodiments of the present application.
  • the communication apparatus 1100 may include: a processor 111 (eg, a CPU) and a transceiver 113 ; wherein the transceiver 113 is coupled to the processor 111 , and the processor 111 controls the transceiver 113 to transmit and receive.
  • the communication apparatus 1100 further includes a memory 112, and various instructions may be stored in the memory 112 for completing various processing functions and implementing the method steps performed by the first device or the second device in the embodiments of the present application.
  • the communication device involved in this embodiment of the present application may further include: a power supply 114 , a system bus 115 , and a communication interface 116 .
  • the transceiver 113 may be integrated in the transceiver of the communication device 1100, or may be an independent transceiver antenna on the communication device.
  • the system bus 115 is used to implement communication connections between elements.
  • the above-mentioned communication interface 116 is used to realize connection and communication between the communication device and other peripheral devices.
  • the processor 111 is configured to be coupled with the memory 112 to read and execute instructions in the memory 112 to implement the method steps performed by the network device, terminal device or core network device in the above method embodiments.
  • the transceiver 113 is coupled with the processor 111 , and the processor 111 controls the transceiver 113 to send and receive messages. The implementation principle and technical effect thereof are similar, and are not repeated here.
  • the system bus mentioned in FIG. 17 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus or the like.
  • PCI peripheral component interconnect
  • EISA extended industry standard architecture
  • the system bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of presentation, only one thick line is used in the figure, but it does not mean that there is only one bus or one type of bus.
  • the communication interface is used to realize the communication between the database access device and other devices (eg client, read-write library and read-only library).
  • the memory may include RAM and may also include non-volatile memory, such as at least one disk storage.
  • the processor mentioned in FIG. 17 can be a general-purpose processor, including a central processing unit CPU, a network processor (NP), etc.; it can also be a digital signal processor DSP, an application-specific integrated circuit ASIC, a field programmable gate Array FPGA or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components.
  • a general-purpose processor including a central processing unit CPU, a network processor (NP), etc.
  • DSP digital signal processor
  • ASIC application-specific integrated circuit
  • FPGA field programmable gate Array FPGA or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components.
  • an embodiment of the present application further provides a readable storage medium, where instructions are stored in the storage medium, and when the storage medium runs on a computer, the computer executes the first device or the second device as described above in the present application. The method performed by the device.
  • an embodiment of the present application further provides a chip for running an instruction, where the chip is used to execute the methods performed by the first device or the second device in the foregoing aspects of the present application.
  • An embodiment of the present application further provides a program product, where the program product includes a computer program, and the computer program is stored in a storage medium, and at least one processor can read the computer program from the storage medium, and the at least one processor can read the computer program from the storage medium.
  • the processor executes the computer program, the method executed by the first device or the second device in the foregoing application can be implemented.
  • “at least one” refers to one or more, and "a plurality” refers to two or more.
  • “And/or”, which describes the association relationship of the associated objects, indicates that there can be three kinds of relationships, for example, A and/or B, which can indicate: the existence of A alone, the existence of A and B at the same time, and the existence of B alone, where A, B can be singular or plural.
  • the character “/” generally indicates that the related objects before and after are an “or” relationship; in the formula, the character “/” indicates that the related objects are a “division” relationship.
  • “At least one item(s) below” or similar expressions thereof refer to any combination of these items, including any combination of single item(s) or plural items(s).
  • At least one item (number) of a, b, or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple Piece.
  • the size of the sequence numbers of the above-mentioned processes does not mean the sequence of execution, and the execution sequence of each process should be determined by its functions and internal logic, and should not be used in the embodiments of the present application. implementation constitutes any limitation.

Abstract

本申请提供一种通信方法及装置，当第一设备向第二设备发送第一信息后，第二设备向第一设备发送第二信息，用于指示第二设备是否为第一设备提供资源辅助信息。使得第一设备能够根据第二设备所反馈的第二信息的指示，确定第二设备是否能够提供资源辅助信息。因此，本实施例提供的通信方法和装置，第一设备能够根据第二信息确定第二设备是否提供资源辅助信息，从而能够减少第一设备一直等待第二设备提供资源辅助信息带来的时延，进而保证了数据传输的时延要求，提高了第一设备进行侧行链路通信时的通信效率和传输的可靠性。

Description

通信方法及装置
本申请要求于2020年08月07日提交中国专利局、申请号为202010791671.X、申请名称为“通信方法及装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域，尤其涉及一种通信方法及装置。
背景技术
侧行链路(sidelink，SL)通信是一种物物直连的通信方式，与传统的设备之间的通信数据必须要经过网络设备不同，侧行链路通信允许设备与设备之间直接传输通信数据。其中，作为发送通信数据的设备向接收设备发送通信数据，作为接收通信数据的设备接收来自发送设备所发送的通信数据。
在现有技术的一些场景中，由于设备进行侧行链路通信时可能没有网络设备的直接参与，因此设备可以自行确定进行侧行链路通信时使用的通信资源。例如，在侧行链路通信中发送数据的设备(记为TX UE)在向接收数据的设备(记为RX UE)发送侧行链路通信数据之前，TX UE可以向其他的设备发送请求信息，并通过其他设备根据请求信息反馈的通信资源信息，确定TX UE在向RX UE发送侧行链路通信数据时可以使用的通信资源。
但是在现有技术中，当TX UE发送请求信息后，如果由于其他设备未接收到请求信息或者无法为TX UE反馈通信资源时，TX UE需要等待较长时间、或者多次重复发送请求信息后，才会通过其他方式继续确定通信资源，从而导致了增加了设备确定侧行链路通信时使用的通信资源的时延，降低了设备进行侧行链路通信时的通信效率。
发明内容
本申请提供一种通信方法及装置，以解决现有技术中设备确定侧行链路通信时通信资源的时延较大的技术问题，从而提高设备进行侧行链路通信时的通信效率。
本申请第一方面提供一种通信方法，对于进行侧行链路通信的第一设备和第三设备，第一设备在向第三设备发送侧行链路通信数据之前，接收来自于第二设备所发送的第二信息，其中，第二信息指示第二设备可以为第一设备提供资源辅助信息。因此，第一设备在进行侧行链路通信之前，确定第二设备能够向其提供资源辅助信息，使得第一设备能够将第二设备发送的资源辅助信息作为参考，最终确定其与第三设备进行侧行链路通信时使用的通信资源，进而提高了第一设备进行侧行链路通信时的通信效率。所述通信资源包括：时间资源、频率资源和/或时频资源等。在本实施例一种具体的实现中，能够提供资源辅助信息的第二设备能够主动向第一设备发送第二信息，来通过第二信息向第一设备指示第二设备可以提供资源辅助信息，减少了第一设备和第 二设备之间的信息交互，进一步提高了第一设备的通信效率。
在本申请第一方面一实施例中，第一设备在接收到来自于第二设备所发送的第二信息之前，在向第三设备发送侧行链路通信数据之前，还可以主动向第二设备发送第一信息，用于向第二设备请求获取资源辅助信息，随后，第二设备在接收到第一信息之后，可以向第一设备发送第二信息，使得第一设备在发送第一信息之后，如果接收到第二信息，则可以根据第二信息至少确定第二设备接收到了第一信息，从而确保了第一设备发送的第二信息的可靠性；以及第一设备可以根据第二信息确定第二设备是否提供资源辅助信息，使得第一设备可以及时跟进第二信息，确定是否继续等待第二设备发送的资源辅助信息，或者尽快放弃等待第二设备发送资源辅助信息，从而能够减少终端设备一直等待第二设备提供资源辅助信息带来的时延，进而保证了数据传输的时延要求，提高了第一设备进行侧行链路通信时的通信效率和传输的可靠性，还提高了频谱利用率。
在本申请第一方面一实施例中，所述第二信息可用于指示第二设备是否为第一设备提供资源辅助信息。则当第二设备确定可以为第一设备提供资源辅助信息，则第二设备发送的第二信息指示第二设备为第一设备提供资源辅助信息；第二设备确定无法为第一设备提供资源辅助信息，则第二设备发送的第二信息指示第二设备不为第一设备提供资源辅助信息。则对于第一设备，在接收到第二信息之后，可以根据第二信息确定第二设备是否能够为第一设备提供资源辅助信息。
或者，第二信息仅用于指示第二设备为第一设备提供资源辅助信息，第一设备没有接收到该第二信息则表示第二设备不为第二设备提供资源辅助信息。当第二设备确定可以为第一设备提供资源辅助信息，则第二设备发送的第二信息指示第二设备为第一设备提供资源辅助信息；当第二设备确定无法为第一设备提供资源辅助信息，则可以不向第一设备发送第二信息，当第一设备在一段时间内没有收到第二信息时，第一设备可以至少做出如下判断：第二设备没有接收到第一信息；或者第二设备不为第一设备提供资源辅助信息。此时，第一设备可以再次向第二设备发送第一信息、或者向其他设备发送第一信息，又或者，采用其他方式确定第一设备进行侧行链路通信时使用的资源。
在申请第一方面一实施例中，第二设备向第一设备所发送的第二信息由第一信道承载，所述第一信道可以是PSFCH，此时，PSFCH承载了第二信息，使得本实施例易于实现，具有普遍性。或者第一信道还可以新定义的信道，新定义的信道例如可以是PSRCH，此时，通过新的信道所携带的第二信息，使得本实施例所新增的第二信息在交互时，不会影响现有其他信道的表达。
在申请第一方面一实施例中，当第二信息由第一信道承载、且第二信息可用于指示第二设备是否为第一设备提供资源辅助信息时，第二信息可以对应于第一信道不同的序列循环移位值来指示“是”或者“否”。例如，当第二信息指示第二设备为第一设备提供资源辅助信息，则第二信息可以对应于第一信道的第一序列循环移位值；当第二信息指示第二设备不为第一设备提供资源辅助信息，第二信息对应于第一信道的第二序列循环移位值。
或者，当第二设备由第一信道承载、且第二信息用于指示第二设备为第一设备提 供资源辅助信息时，第二信息可以对应于第一信道的序列循环移位值来指示，例如，当第二信息指示第二设备为第一设备提供资源辅助信息，则第二信息可以对应于第一信道的第三序列循环移位值。
在本申请第一方面一实施例中，当承载第二信息的第一信道为PSFCH时，第二信息具体承载在第一资源集合内。其中，记用于传输承载第二信息的PSFCH资源的资源集合为第一资源集合，记用于传输承载HARQ-ACK的PSFCH资源的资源集合为第二资源集合。则第一资源集合和第二资源是互为补集的PSFCH资源。上述第一资源集合可以具体通过比特图的形式进行指示。本实施例通过合理利用用于传输承载HARQ-ACK的PSFCH资源的资源集合的补集资源，提高了频谱利用效率，同时该补集资源可以用于传输第二信息，提供了第一设备的传输可靠性。
在本申请第一方面一实施例中，记第一设备在第一时隙向第二设备发送第一信息、第二设备在第二时隙向第一设备发送第二信息(可以理解为第一设备在第二时隙接收来自第二设备的第二信息)。则第一时隙和第二时隙之间的相对关系可以至少满足以下条件，第二时隙是第一信息的最后一个符号所在时隙之后的、包括PSFCH的第一个时隙，或者，第二时隙可以是第一时隙后，间隔N个时间单元后的、包括PSFCH的第一个时隙，或者第一时隙和第二时隙的时间间隔为N个时间单元。
在本申请第一方面一实施例中，第二设备向第一设备所发送的第二信息还可以承载在传输第一信道的资源集合内。其中，用于传输第一信道的资源的集合和PSFCH的资源的集合独立配置，可选的，可以采用频分复用的配置方式。
在本申请第一方面一实施例中，第二信息还可以对应于第一信道中的一个或多个比特位，这一个或多个比特位可用于同时指示第二设备是否为第一设备提供资源辅助信息或第二设备为第一设备提供资源辅助信息，以及指示第二设备是否成功接收到第一设备发送的数据。因此，第二设备可以不用通过不同的资源，对第二设备发送的HARQ信息和第二信息进行区分，而是通过一个或多个比特位共同承载HRAR信息和第二信息。并且本实施例中提供的第二信息可以承载在传输PSFCH资源的资源集合内。
在本申请第一方面一实施例中，记第一设备在第一时隙向第二设备发送第一信息、第二设备在第二时隙向第一设备发送第二信息(第一设备在第二时隙接收来自第二设备的第二信息)。第一时隙和第二时隙之间的相对关系可以至少满足以下条件：第二时隙为第一时隙加上M个时间单元的时间间隔后之后、包括PSFCH的第一个时隙，或者，第一时隙和第二时隙的时间间隔为M个时间单元。所述时间间隔配置在资源池上，时隙可以是资源池内的逻辑时隙，也可以是资源池内和资源池外的物理时隙。
在本申请第一方面一实施例中，当第一设备接收到第二设备发送的第二信息(可以理解为，第一设备接收到来自第二设备的第二信息)，并且第二信息指示第二设备为第一设备提供资源辅助信息之后，则第二设备在随后的第二时间段内，可以不再向第一设备发送第二信息，而是可以接收到第二设备周期性发送的资源辅助信息。即第一设备接收来自第二设备的第二信息，所述第二信息指示第二设备为第一设备提供资源辅助信息，则第一设备会接收到来自第二设备的周期性的资源辅助信息。本实施例可应用于第一设备可能会在短时间内频繁向同一个第二设备请求获取资源辅助信息的场景，从而减少第一设备和第二设备之间频繁的信令交互带来的通信开销和信令开销。
在本申请第一方面一实施例中，当第一设备向第二设备发送第一信息之后，若接收到第二设备发送的第二信息，而第二信息指示第二设备不为第一设备提供资源辅助信息，则第一设备可以采用其他方式确定资源辅助信息，或者不使用资源辅助信息来确定通信资源。
或者，当第一设备向第二设备发送第一信息之后，在第一时间段内都没有接收到第二设备发送的第二信息，则第一设备可以采用其他方式确定资源辅助信息，或者不使用资源辅助信息来确定通信资源。
上述其他方式包括：第一设备向第四设备发送第一信息、或者第一设备再次向第二设备重新发送第一信息等。第四设备是除了上述第一设备和第二设备之外的其他设备。
在本申请第一方面一实施例中，当第一设备接收到第二设备发送的第二信息后，第一设备和第二设备之间可以建立连接关系，则在第二时间段内，第一设备和第二设备之间都保持所建立的连接关系。具体而言，第一设备若向第二设备发送第一信息，请求第二设备向第一设备提供资源辅助信息，则第二设备可以不向第一设备发送第二信息来指示其可以为第一设备提供资源辅助信息，而是直接通过向第一设备发送资源辅助信息，使得第二设备可以持续向第一设备提供资源辅助信息，尤其在不发送第二信息的情况下直接向第一设备提供资源辅助信息，从而减少了第一设备和第二设备之间的信息交互，进一步提高通信效率。
在本申请第一方面实施例中，上述第二时间段内第一设备和第二设备之间建立的连接关系，可以通过信令指示的方式断开。例如，在前述实施例的基础上，所述通信方法还包括：所述第一设备接收所述第二设备发送的中断信息；所述中断信息用于指示所述第二设备停止根据所述第二时间段内的第一信息向所述第一设备发送资源辅助信息。
其中，当第一设备和第二设备之间建立连接关系后，第二设备可以向第一设备发送中断信息，则当第一设备接收到中断信息后断开第一设备和第二设备之间所建立的连接关系。即，所述终端信息用于指示所述连接关系失效。在此之后，若第一设备再向第二设备发送第一信息，则第二设备再向第一设备发送资源辅助信息之前，还需要向第一设备发送第二信息。即此时第一设备发送第一信息后需要等待第二信息来确定第二设备为其提供资源辅助信息。
或者，在另一种实现中，在前述实施例的基础上，所述方法还包括：所述第一设备接收所述第二设备发送的中断信息；所述中断信息用于指示所述第二设备在所述第二时间段内，停止向所述第一设备发送资源辅助信息；或者，所述第一设备向所述第二设备发送所述中断信息。
当第一设备和第二设备之间建立连接关系后，第二设备可以向第一设备发送中断信息，则当第一设备接收到中断信息后断开第一设备和第二设备之间所建立的连接关系；或者，第一设备也可以向第二设备发送中断信息，则当第二设备接收到中断信息后断开第一设备和第二设备之间所建立的连接关系。在此之后，若第一设备再向第二设备发送第一信息，则第二设备再向第一设备发送资源辅助信息之前，还需要向第一设备发送第二信息。
在本申请第一方面一实施例中，第一信息承载在第一设备向第二设备发送的信令中，所述信令为侧行控制信息SCI或MAC CE。所述SCI包括第一级SCI和/或第二级SCI。可选的，所述信令还包括PSCCH(physical sidelink control channel)，PSSCH(physical sidelink shared channel)，PC5 RRC，MAC，RRC,SIB,MIB中的一种。
本申请第二方面提供一种通信方法，其中，对于能够提供资源辅助信息的第二设备，可以主动向第一设备发送第二信息，来通过第二信息向第一设备指示第二设备可以提供资源辅助信息，减少了第一设备和第二设备之间的信息交互，进一步提高了第一设备的通信效率。其中，第二信息指示第二设备可以为第一设备提供资源辅助信息。因此，第一设备在进行侧行链路通信之前，确定第二设备能够向其提供资源辅助信息，使得第一设备能够将第二设备发送的资源辅助信息作为参考，最终确定其与第三设备进行侧行链路通信时使用的通信资源，进而提高了第一设备进行侧行链路通信时的通信效率。所述通信资源包括：时间资源、频率资源和/或时频资源等。
在本申请第二方面一实施例中，对于进行侧行链路通信的第一设备和第三设备，第一设备在向第三设备发送侧行链路通信数据之前，还可以主动向第二设备发送第一信息，用于向第二设备请求获取资源辅助信息。则对于第二设备，在接收到第一信息之后，可以向第一设备发送第二信息，使得第一设备在发送第一信息之后，如果接收到第二信息，则可以根据第二信息至少确定第二设备接收到了第一信息，从而确保了第一设备发送的第二信息的可靠性；以及第一设备可以根据第二信息确定第二设备是否提供资源辅助信息，使得第一设备可以及时跟进第二信息，确定是否继续等待第二设备发送的资源辅助信息，或者尽快放弃等待第二设备发送资源辅助信息，从而能够减少终端设备一直等待第二设备提供资源辅助信息带来的时延，进而保证了数据传输的时延要求，提高了第一设备进行侧行链路通信时的通信效率和传输的可靠性，还提高了频谱利用率。
在本申请第二方面一实施例中，所述第二信息可用于指示第二设备是否为第一设备提供资源辅助信息。则当第二设备确定可以为第一设备提供资源辅助信息，则第二设备发送的第二信息指示第二设备为第一设备提供资源辅助信息；第二设备确定无法为第一设备提供资源辅助信息，则第二设备发送的第二信息指示第二设备不为第一设备提供资源辅助信息。则对于第一设备，在接收到第二信息之后，可以根据第二信息确定第二设备是否能够为第一设备提供资源辅助信息。
或者，第二信息仅用于指示第二设备为第一设备提供资源辅助信息，第一设备没有接收到该第二信息则表示第二设备不为第二设备提供资源辅助信息。当第二设备确定可以为第一设备提供资源辅助信息，则第二设备发送的第二信息指示第二设备为第一设备提供资源辅助信息；当第二设备确定无法为第一设备提供资源辅助信息，则可以不向第一设备发送第二信息，当第一设备在一段时间内没有收到第二信息时，第一设备可以至少做出如下判断：第二设备没有接收到第一信息；或者第二设备不为第一设备提供资源辅助信息。此时，第一设备可以再次向第二设备发送第一信息、或者向其他设备发送第一信息，又或者，采用其他方式确定第一设备进行侧行链路通信时使用的资源。
在本申请第二方面一实施例中，第二设备向第一设备所发送的第二信息由第一信 道承载，所述第一信道可以是PSFCH，此时，PSFCH承载了第二信息，使得本实施例易于实现，具有普遍性。或者第一信道还可以新定义的信道，新定义的信道例如可以是PSRCH，此时，通过新的信道所携带的第二信息，使得本实施例所新增的第二信息在交互时，不会影响现有其他信道的表达。
在本申请第二方面一实施例中，当第二信息由第一信道承载、且第二信息可用于指示第二设备是否为第一设备提供资源辅助信息时，第二信息可以对应于第一信道不同的序列循环移位值来指示“是”或者“否”。例如，当第二信息指示第二设备为第一设备提供资源辅助信息，则第二信息可以对应于第一信道的第一序列循环移位值；当第二信息指示第二设备不为第一设备提供资源辅助信息，第二信息对应于第一信道的第二序列循环移位值。
或者，当第二设备由第一信道承载、且第二信息用于指示第二设备为第一设备提供资源辅助信息时，第二信息可以对应于第一信道的序列循环移位值来指示，例如，当第二信息指示第二设备为第一设备提供资源辅助信息，则第二信息可以对应于第一信道的第三序列循环移位值。
在本申请第二方面一实施例中，当承载第二信息的第一信道为PSFCH时，第二信息具体承载在第一资源集合内。其中，记用于传输承载第二信息的PSFCH资源的资源集合为第一资源集合，记用于传输承载HARQ-ACK的PSFCH资源的资源集合为第二资源集合。则第一资源集合和第二资源是互为补集的PSFCH资源。上述第一资源集合可以具体通过比特图的形式进行指示。本实施例通过合理利用用于传输承载HARQ-ACK的PSFCH资源的资源集合的补集资源，提高了频谱利用效率，同时该补集资源可以用于传输第二信息，提供了第一设备的传输可靠性。
在本申请第二方面一实施例中，记第一设备在第一时隙向第二设备发送第一信息、第二设备在第二时隙向第一设备发送第二信息(可以理解为第一设备在第二时隙接收来自第二设备的第二信息)。则第一时隙和第二时隙之间的相对关系可以至少满足以下条件，第二时隙是第一信息的最后一个符号所在时隙之后的、包括PSFCH的第一个时隙，或者，第二时隙可以是第一时隙后，间隔N个时间单元后的、包括PSFCH的第一个时隙，或者第一时隙和第二时隙的时间间隔为N个时间单元。
在本申请第二方面一实施例中，第二设备向第一设备所发送的第二信息还可以承载在传输第一信道的资源集合内。其中，用于传输第一信道的资源的集合和PSFCH的资源的集合独立配置，可选的，可以采用频分复用的配置方式。
在本申请第二方面一实施例中，第二信息还可以对应于第一信道中的一个或多个比特位，这一个或多个比特位可用于同时指示第二设备是否为第一设备提供资源辅助信息或第二设备为第一设备提供资源辅助信息，以及指示第二设备是否成功接收到第一设备发送的数据。因此，第二设备可以不用通过不同的资源，对第二设备发送的HARQ信息和第二信息进行区分，而是通过一个或多个比特位共同承载HRAR信息和第二信息。并且本实施例中提供的第二信息可以承载在传输PSFCH资源的资源集合内。
在本申请第二方面一实施例中，记第一设备在第一时隙向第二设备发送第一信息、第二设备在第二时隙向第一设备发送第二信息(第一设备在第二时隙接收来自第二设备的第二信息)。第一时隙和第二时隙之间的相对关系可以至少满足以下条件：第二 时隙为第一时隙加上M个时间单元的时间间隔后之后、包括PSFCH的第一个时隙，或者，第一时隙和第二时隙的时间间隔为M个时间单元。所述时间间隔配置在资源池上，时隙可以是资源池内的逻辑时隙，也可以是资源池内和资源池外的物理时隙。
在本申请第二方面一实施例中，第一设备接收到第二设备发送的第二信息(可以理解为，第一设备接收到来自第二设备的第二信息)，并且第二信息指示第二设备为第一设备提供资源辅助信息之后，则第二设备在随后的第二时间段内，可以不再向第一设备发送第二信息，而是可以接收到第二设备周期性发送的资源辅助信息。即第一设备接收来自第二设备的第二信息，所述第二信息指示第二设备为第一设备提供资源辅助信息，则第一设备会接收到来自第二设备的周期性的资源辅助信息。本实施例可应用于第一设备可能会在短时间内频繁向同一个第二设备请求获取资源辅助信息的场景，从而减少第一设备和第二设备之间频繁的信令交互带来的通信开销和信令开销。
在本申请第二方面一实施例中，当第一设备接收到第二设备发送的第二信息后，第一设备和第二设备之间可以建立连接关系，则在第二时间段内，第一设备和第二设备之间都保持所建立的连接关系。具体而言，第一设备若向第二设备发送第一信息，请求第二设备向第一设备提供资源辅助信息，则第二设备可以不向第一设备发送第二信息来指示其可以为第一设备提供资源辅助信息，而是直接通过向第一设备发送资源辅助信息，使得第二设备可以持续向第一设备提供资源辅助信息，尤其在不发送第二信息的情况下直接向第一设备提供资源辅助信息，从而减少了第一设备和第二设备之间的信息交互，进一步提高通信效率。
在本申请第二方面一实施例中，上述第二时间段内第一设备和第二设备之间建立的连接关系，可以通过信令指示的方式断开。例如，在前述实施例的基础上，所述通信方法还包括：所述第一设备接收所述第二设备发送的中断信息；所述中断信息用于指示所述第二设备停止根据所述第二时间段内的第一信息向所述第一设备发送资源辅助信息。
其中，当第一设备和第二设备之间建立连接关系后，第二设备可以向第一设备发送中断信息，则当第一设备接收到中断信息后断开第一设备和第二设备之间所建立的连接关系。即，所述终端信息用于指示所述连接关系失效。在此之后，若第一设备再向第二设备发送第一信息，则第二设备再向第一设备发送资源辅助信息之前，还需要向第一设备发送第二信息。即此时第一设备发送第一信息后需要等待第二信息来确定第二设备为其提供资源辅助信息。
或者，在另一种实现中，在前述实施例的基础上，所述方法还包括：所述第一设备接收所述第二设备发送的中断信息；所述中断信息用于指示所述第二设备在所述第二时间段内，停止向所述第一设备发送资源辅助信息；或者，所述第一设备向所述第二设备发送所述中断信息。
当第一设备和第二设备之间建立连接关系后，第二设备可以向第一设备发送中断信息，则当第一设备接收到中断信息后断开第一设备和第二设备之间所建立的连接关系；或者，第一设备也可以向第二设备发送中断信息，则当第二设备接收到中断信息后断开第一设备和第二设备之间所建立的连接关系。在此之后，若第一设备再向第二设备发送第一信息，则第二设备再向第一设备发送资源辅助信息之前，还需要向第一 设备发送第二信息。
在本申请第二方面一实施例中，第一信息承载在第一设备向第二设备发送的信令中，所述信令为侧行控制信息SCI或MAC CE。所述SCI包括第一级SCI和/或第二级SCI。可选的，所述信令还包括PSCCH(physical sidelink control channel)，PSSCH(physical sidelink shared channel)，PC5RRC，MAC，RRC,SIB,MIB中的一种。
本申请第三方面提供一种通信方法，包括：
第一设备向第二设备发送第一信息；其中，所述第一信息用于请求获取资源辅助信息；
所述第一设备在第一时间段内未接收到所述第二信息，所述第一设备向第四设备发送所述第一信息；或者，所述第一设备向所述第二设备发送所述第一信息；或者，所述第一设备不使用所述资源辅助信息确定通信资源。或者，所述第一设备不再等待接收所述第二信息，或者所述第一设备重新发送所述第一信息。其中，所述第二信息指示所述第二设备为所述第一设备提供资源辅助信息；或者，所述第二信息具体用于指示所述第二设备是否为所述第一设备提供所述资源辅助信息。或者，所述第二信息为资源辅助信息。
其中，本实施例提供的通信方法，对于进行侧行链路通信的第一设备和第三设备，第一设备在向第三设备发送侧行链路通信数据之前，向第二设备发送第一信息，用于向第二设备请求获取资源辅助信息。然而，如果当第一设备在第一时间段内未接收到第二信息的情况下，采用其他方式确定通信资源，而不是一直等待第二设备的响应或资源辅助信息，从而可以在减少时延的同时，在一些情况下，假设第二设备间隔较长时间才向第一设备提供资源辅助信息，此时的资源辅助信息无法给第一设备确定通信资源带来增益，第一设备应在第一时间段之后，就采用其他方式确定获取资源辅助信息，因此本实施例还可以保证数据传输的时延要求和可靠性，提高资源辅助信息的时效性。
在一种实现方式中，第一时间段可以是网络设备配置的，具体而言，可以是RRC消息，MAC消息，MAC CE消息，MIB消息，SIB消息中的一种。可以是和资源池相关联的，可以是第一设备的定时器来维护的，即第一设备发送第一消息后激活该定时器，该定时器的长度为第一时间段，第一设备在该第一时间段中等待接收第二信息。所述定时器的长度是网络设备配置的。
有关第一信息、第二信息的具体实现可参照如本申请第二方面任一项的记载，不再赘述。
本申请第四方面提供一种通信装置，可用于执行如本申请第一方面中任一项所述的通信方法，该装置可以包括：处理模块和通信模块，其中，通信模块可用于实现通信装置与其他装置进行通信，处理模块可用于执行第一方面中任一项所述的通信方法。
在本申请第四方面一实施例中，通信模块可用于接收来自第二设备的第二信息。
在本申请第四方面一实施例中，通信模块还可用于向第二设备发送第一信息。
有关第一信息和第二信息的具体说明可参照如本申请第一方面中的记载。
在本申请第四方面一实施例中，通信模块还用于向第四设备发送第一信息。
在本申请第四方面一实施例中，通信模块还可以具体用于，在第二时间段内，向 第二设备发送第一信息，并接收第二设备根据第一信息发送的资源辅助信息。
有关本申请第四方面中记载的通信装置所实现的技术效果可参照第一方面对应的通信方法，不再赘述。
本申请第五方面提供一种通信装置，可用于执行如本申请第二方面中任一项所述的通信方法，该装置可以包括：处理模块和通信模块，其中，通信模块可用于实现通信装置与其他装置进行通信，处理模块可用于执行第二方面中任一项所述的通信方法。
在本申请第五方面一实施例中，通信模块可用于向第一设备发送第二信息。
在本申请第五方面一实施例中，通信模块可用于接收第一设备发送的第一信息。
有关第一信息和第二信息的具体说明可参照如本申请第二方面中的记载。
在本申请第五方面一实施例中，通信模块还可以用于在第二时间段内，至少一次向第一设备发送资源辅助信息。
在本申请第五方面一实施例中，通信模块还可以具体用于在第二时间段内，接收来自第一设备发送的第一信息，处理器可用于根据第一信息，通过向第二设备发送资源辅助信息。
有关本申请第五方面中记载的通信装置所实现的技术效果可参照第二方面对应的通信方法，不再赘述。
本申请第六方面提供一种通信装置，可用于执行如本申请第三方面中任一项所述的通信方法，该装置可以包括：处理模块和通信模块，其中，通信模块可用于实现通信装置与其他装置进行通信，处理模块可用于执行第一方面中任一项所述的通信方法。
在本申请第六方面一实施例中，通信模块可用于向第二设备发送第一信息；随后，在第一时间段内未接收到所述第二信息，所述通信模块还用于向第四设备发送所述第一信息；或者，所述通信模块还用于向所述第二设备发送所述第一信息；或者，所述通信装置不使用所述资源辅助信息确定通信资源。
有关本申请第六方面中记载的通信装置所实现的技术效果可参照第三方面对应的通信方法，不再赘述。
第七方面，本申请实施例提供一种通信装置，包括：处理器和通信接口。
所述通信接口用于实现所述通信装置与外设的连接通信。
所述处理器用于实现上述第一方面、第二方面、第三方面、第四方面、第五方面或者第六方面所述的方法。
作为一种可能的设计，上述通信装置还包括：存储器。
所述存储器用于存储计算机程序，所述处理器执行所述存储器中存储的计算机程序，以使得所述装置执行上述第一方面、第二方面、第三方面、第四方面、第五方面或者第六方面所述的方法。
作为一种可能的设计，上述通信装置还包括：收发器。
所述收发器用于进行消息收发。
第八方面，本申请实施例提供一种计算机可读存储介质，所述计算机可读存储介质存储有计算机程序，当所述计算机程序被运行时，实现如上述第一方面、第二方面或者第三方面所述的方法。
第九方面，本申请实施例提供一种芯片，包括处理器和通信接口；
所述通信接口用于实现与其他设备通信；
所述处理器用于读取指令以实现如上述第一方面、第二方面或者第三方面所述的方法。
第十方面，本申请实施例提供一种计算机程序产品，所述计算机程序产品包括计算机程序代码，当所述计算机程序代码被计算机执行时，使得所述计算机执行如上述第一方面、第二方面或者第三方面所述的方法。
第十一方面，本申请实施例提供一种通信系统，所述通信系统中，包括如本申请第四方面任一项所述的通信装置作为第一设备、本申请第五方面任一项所述的通信装置第二设备；或者，包括如本申请第六方面任一项所述的通信装置作为第一设备、本申请第五方面任一项所述的通信装置第二设备。
附图说明
图1为本申请实施例可以应用的通信系统的架构示意图；
图2为本申请所应用的V2X场景的示意图；
图3为一种通信系统中V2X通信装置进行侧行链路通信时使用的时隙结构的示意图；
图4为另一种V2X通信装置进行侧行链路通信时使用的时隙结构的示意图；
图5为一种终端设备进行侧行链路通信的示意图；
图6为本申请提供的通信方法一实施例的流程示意图；
图6A为本申请提供的通信方法一实施例的流程示意图；
图7为本申请提供的通信方法一实施例的流程示意图；
图7A为本申请提供的通信方法一实施例的流程示意图；
图8为一种时隙结构的示意图；
图9为本申请提供的通信方法一实施例的流程示意图；
图10为本申请提供的通信方法一实施例的流程示意图；
图11为本申请提供的通信方法一实施例的流程示意图；
图12为本申请提供的通信方法一实施例的流程示意图；
图13为本申请提供的通信方法一实施例的流程示意图；
图14为本申请提供的通信方法一实施例的流程示意图；
图15为本申请提供的通信方法一实施例的流程示意图；
图16为本申请提供的通信装置一实施例的结构示意图；
图17为本申请提供的通信装置一实施例的结构示意图。
具体实施方式
下面在介绍本申请实施例之前，先结合附图，对本申请应用的场景以及该应用场景中存在的技术问题进行说明。
图1为本申请实施例可以应用的通信系统的架构示意图，如图1所示的通信系统包括网络设备和至少一个终端设备(例如图1中的终端设备1和终端设备2)，终端设备可以通过无线或有线的方式与网络设备相连。图1只是示意图，该通信系统中还 可以包括其它网络设备，如还可以包括无线中继设备和无线回传设备，在图1中未画出。本申请的实施例对该移动通信系统中包括的网络设备和终端设备的数量不做具体限定。
在本申请实施例中，网络设备可以是终端设备通过无线方式接入到移动通信系统中的接入设备，可以是基站(base station，BS)，例如：第三代(third generation，3G)通信系统中的节点B(NodeB)、长期演进(long term evolution，LTE)通信系统中的演进型基站(evolved NodeB，eNodeB)、5G移动通信系统中的基站gNodeB或gNB、未来移动通信系统中的基站或无线保真(wireless-fidelity，WiFi)系统中的接入节点等，本申请的实施例对接入网设备所采用的具体技术和具体设备形态不做限定。
在本申请实施例中，终端设备也可以称为终端(terminal)。终端设备可以是用户设备(user equipment，UE)、移动台(mobile station，MS)、移动终端设备(mobile terminal，MT)等，终端设备也可以是手机(mobile phone)、平板电脑(Pad)、带无线收发功能的电脑、虚拟现实(virtual reality，VR)终端设备、增强现实(augmented reality，AR)终端设备、工业控制(industrial control)中的无线终端设备、无人驾驶(self driving)中的无线终端设备、远程手术(remote medical surgery)中的无线终端设备、智能电网(smart grid)中的无线终端设备、运输安全(transportation safety)中的无线终端设备、智慧城市(smart city)中的无线终端设备、智慧家庭(smart home)中的无线终端设备，V2X(vehicle to everything)系统中的设备等。
为了提高通信系统的通信效率、降低网络负载，在例如图1中所示通信系统中，包括LTE通信系统、NR通信系统在内的一些通信系统，终端设备与终端设备之间可以进行侧行链路(sidelink，SL)通信。这里的侧行链路通信也可以称为边链路通信或旁链路通信。侧行链路通信允许终端设备与终端设备之间直接进行通信，例如在如图1所示的系统中，假设终端设备1可以作为侧行链路通信的发送端向终端设备2发送数据，终端设备2可以作为侧行链路通信的接收端接收来自终端设备1所发送的数据。而在上述侧行链路通信过程中，网络设备并没有直接参与终端设备1向终端设备2发送数据，即终端设备1的数据并没有经过网络设备、而是直接从终端设备1到达终端设备2，实现了数据端到端的直接传输。需要说明的是，侧行链路通信除了提供一对一的通信，还可以提供一对多的侧行链路通信方式，而一对一和一对多的侧行链路通信又可以划分为包含中继节点和不包含中继节点的通信。本申请图1的示例仅以侧行链路通信中的一对一通信作为举例说明，对于侧行链路通信时终端设备的数量以及是否包含中继节点不做限定。
作为一种特殊的应用场景，图2为本申请所应用的车辆到一切(vehicle to everything，V2X)场景的示意图，具体地，在如图2所示的V2X场景中，车辆可以通过在车辆上设置V2X通信装置进行通信，此时，每个车辆上设置的V2X通信装置即可以作为如图1所示的终端设备。则通过所设置的V2X通信装置，图中的车辆可以与其他车辆进行车与车(vehicle to vehicle，V2V)通信，与其他行人进行车与行人(vehicle to pedestrian，V2P)通信，与其他路侧基础设备进行车与基础设施(vehicle to  infrastructure，V2I)通信，或者通信网络进行车与网络(vehicle to network，V2N)通信。V2X通信能够实现车辆与行人、其他车辆、路侧设备、网络之间的全方位连接和高效信息交互，实现信息服务、交通安全、交通效率等功能。同时，随着网络技术以及智能车辆技术的发展，车辆通过V2X通信装置能够实现的功能也越来越丰富，例如，V2X通信装置通过V2I和V2N通信可以获取各种信息服务，包括交通信号灯信息，附近区域车辆信息，车辆导航信息，紧急救援信息，娱乐服务信息等；V2X通信装置通过V2V和V2P通信可以实时获取周围车辆的车速、位置、行车情况及行人活动等信息，并通过智能算法实现碰撞预警功能，避免车辆发生交通事故；V2X通信装置通过V2I通信可以实现车速引导等功能以提高交通效率。
本申请各实施例中，可以将如图2所示的V2X通信装置作为如图1所示的终端设备，并使得V2X通信装置之间进行侧行链路通信作为示例，而非对其进行限定。例如，图3为一种通信系统中V2X通信装置进行侧行链路通信时使用的时隙结构的示意图，所述通信系统可以是例如新空口(new radio，NR)通信系统。
具体地，V2X的时隙结构在标准循环前缀(normal cyclic prefix，NCP)下，一个时间单元(时隙，slot)可以包括14个符号，而一个时隙内用于承载用于侧行链路通信的物理侧行链路控制信道(pysical sidelink control channel，PSCCH)的符号个数可以是在每个资源池上配置的，具体可以是2或者3。例如，如图3所示时隙内，符号2-符号3可用于承载PSCCH。同时，PSCCH的候选物理资源块(physical resource block)PRB的个数也可以是每个资源池配置的，PSCCH承载于子信道中，PSCCH中承载第一级侧行链路控制信息(sidelink control information，SCI)。此外，如图3所示的每个时隙中第一个符号可用于自动增益控制(automatic gain control，AGC)，最后一个符号为保护间隔，其余符号可用于发送数据和第二级SCI。
在一些通信系统中，V2X通信装置还可以支持通过单播以及组播等方式进行侧行链路通信，所述通信系统可以是例如NR通信系统。而在V2X通信装置进行单播和组播时，还需要通过混合自动反馈重传(hybrid automatic repeat request，HARQ)技术来保证单播和组播所传输的数据的正确性。
其中，HARQ技术将FEC与ARQ结合起来，将数据块(或称为传输块(transport block，TB))进行编码后，发送端在第一次传输时发送信息比特和一部分冗余比特，如果接收端能够正确译码，则接收端反馈ACK信号给发送端，随后发送端确认接收端已经成功接收对应的信息比特后，即可认为所发送的TB已经成功传输。而如果接收端不能够正确译码，则接收端反馈NACK给发送端，随后发送端再进一步传输一部分信息比特和/或冗余比特到接收端，这个过程可以称为重传数据；当接收端接收重传数据后，与之前接收到的数据合并后进行译码，如果加上重传的冗余比特仍然无法正常解码，则进行再次重传。随着重传次数的增加，冗余比特不断积累，信道编码率不断降低，从而可以获得更好的解码效果。
当V2X通信装置进行侧行链路通信时，接收端所传输的HARQ信息由反馈信道承载，该反馈信道可以是物理侧行链路反馈信道(physical sidelink feedback channel，PSFCH)。具体地，图4为另一种V2X通信装置进行侧行链路通信时使用的时隙结构的 示意图，在如图4所示的通信系统为NR V2X时隙结构示例中，支持一个符号的基于序列的PSFCH格式，可用于承载1比特的ACK或NACK，或者只是NACK。例如，PSFCH资源可以是周期性的配置在资源池上的，PSFCH资源的配置周期可以是N个时隙，N可以是0、1、2或者4。其中，N＝0表示没有HARQ反馈资源，即去使能HARQ反馈。N为1、2或者4表示每1、2或者4个时隙有一个PSFCH资源。如图4所示的时隙中以N＝1为例。此外，针对物理侧行链路共享信道(physical sidelink shared channel，PSSCH)和PSFCH之间的时间间隔(反馈的定时)，可以定义为：假设一个PSSCH传输的最后一个符号在时隙n，与该PSSCH承载的数据对应的HARQ信息可以在n+a时隙，其中a是大于等于K的最小正整数，K是PSSCH到PSFCH之间的最小时间间隔，可以是2或3。
进一步地，在如图1所示的系统中，虽然终端设备与终端设备之间通过侧行链路通信方式传输数据时，可以没有网络设备的直接参与。但是终端设备与终端设备之间进行侧行链路通信发送数据和接收数据时所使用的通信资源，在某些场景下还是需要网络设备进行配置。从而使得终端设备能够使用合法、合适的通信资源或通信方式进行侧行链路通信，以提高终端设备的侧行链路通信效率，并避免终端设备在侧行链路通信时所使用的资源对其他终端设备或者其他通信方式产生干扰。
侧行链路中有两种获取资源的方式，模式1和模式2。其中模式1下终端设备通过向网络设备例如基站发送请求信息来获取资源。模式2下终端设备自主确定资源，其中资源选择的方式包括感知(sensing)，部分感知或者随机选择。
而在一些情况下，当作为发送端的终端设备因为一些原因在确定进行侧行链路通信的通信资源时干扰较大，无法保证数据传输的可靠性。例如，终端设备由于隐藏节点的原因，在进行感知的时候没有检测到隐藏节点占用的资源，但是作为接收端的终端设备可以检测到该隐藏节点占用的资源，于是该数据传输的可靠性降低，发生传输冲突的概率增加。或者，终端设备因节省电量不能确定通信资源，例如，终端设备无法通过感知的方式确定通信资源。因此，为了终端设备依然能够进行侧行链路通信，并且保证数据传输的可靠性。在一些技术中，终端设备可以通过向其他终端设备发送辅助资源请求信息的方式，请求其他终端设备向该终端设备提供资源辅助信息，进而使得该终端设备能够根据其他终端设备提供的资源辅助信息，确定其进行侧行链路通信的通信资源，最终可以进行侧行链路通信。
例如，图5为一种终端设备进行侧行链路通信的示意图，其中，记进行侧行链路通信时发送数据的终端设备为UE1、接收UE1的数据的终端设备为UE2，则UE1为了与UE2进行侧行链路通信，在S10中向UE3发送资源辅助信息的请求，所述UE3可以是UE2周围最近的设备、也可以是与UE1类型、参数相同的UE，也可以是UE2本身。本申请对UE3的具体实现不做限定，只要其能够为UE1提供资源辅助信息，即可作为UE3。随后，UE1在S20接收UE3发送的资源辅助信息，并在S30中将接收到的资源辅助信息作为参考，确定UE1在侧行链路通信时使用的通信资源(实际可以使用或者也可以不使用UE3发送的资源辅助信息)。最终，UE1可以使用所确定的通信资源，在S40向UE2发送数据，进行侧行链路通信。
但是，在如图5所示的技术中，当UE1通过S10向UE3发送资源辅助信息的请求后，如果由于UE3并未接收到该请求、或者UE3无法为UE1资源辅助信息、又或者UE3 拒绝为UE1提供资源辅助信息时，UE1将无法通过S20接收到资源辅助信息。此时，UE1要么多次重复向UE3发送请求、要么继续等待较长时间之后，才会放弃从UE3获取资源辅助信息，转而通过其他方式继续确定通信资源。在这个过程中，UE1向UE3发送的请求没有意义，还增加了UE1确定侧行链路通信时使用的通信资源的时延，进而降低了UE1进行侧行链路通信时的通信效率。
因此，本申请提供一种通信方法及装置，当进行侧行链路通信的终端设备发送资源辅助信息请求之后，侧行链路通信的终端设备能够根据接收到资源辅助信息的终端设备的反馈，确定其是否能够提供资源辅助信息，从而既能够保证待传输数据的可靠性，还能够减少接收到资源辅助信息的终端设备无法提供资源辅助信息时，进行侧行链路通信的终端设备的时延，进而提高了终端设备进行侧行链路通信时的通信效率。
下面以具体地实施例对本申请提供的技术方案进行详细说明。下面这几个具体的实施例可以相互结合，对于相同或相似的概念或过程可能在某些实施例不再赘述。
实施例一
图6为本申请提供的通信方法一实施例的流程示意图，其中，如图6所示的方法可应用于如图1所示的终端设备之间进行侧行链路通信的场景中。并将在进行侧行链路通信时发送数据的终端设备记为第一设备，将在进行侧行链路通信时接收数据的终端设备记为第三设备。具体地，本实施例提供的方法包括：
S101、第一设备向第二设备发送第一信息，所述第一信息用于向第二设备请求资源辅助信息；相应地，第二设备接收来自第一设备发送的第一信息。
具体地，第一设备在进行侧行链路通信，即向第三设备发送侧行链路通信数据之前，首先需要确定可以使用的通信资源，包括：时域资源、频域资源以及时频资源等。而为了确定通信资源，第一设备可以向第二设备请求资源辅助信息，当第二设备向第一设备发送资源辅助信息后，第一设备可以参考所接收到的资源辅助信息来确定通信资源。其中，第二设备可以是任意可以向第一设备提供资源辅助信息的设备，例如，位于第三设备附近的另一个终端设备。其中，请求资源辅助信息可以理解为请求资源信息，请求时频资源信息，请求时域资源信息，或请求频域资源信息。请求可以理解为获取，获得，得到，在本发明中不限定。资源辅助信息可以理解为时频资源信息，资源信息，时域资源信息，或频域资源信息。
可选地，第一设备可以在侧行链路通信时向第二设备发送第一信息来请求资源辅助信息，此时，每次发送的第二设备可以相同或不同。或者，在一些具体的实现中，第一设备可以在是由于是隐藏节点而无法获得可靠的通信资源，或者，因节省电量选择发送请求资源辅助信息来获取资源等情况，无法直接由第一设备自身确定通信资源，或者直接由第一设备自身确定通信资源无法保证数据传输的可靠性。则终端设备可以向第二设备发送第一信息。
在一种具体的实现方式中，第一信息可以承载在第一设备向第二设备发送的控制信令中，所述控制信令可以是侧行链路控制信息(sidelink control information，SCI)或者MAC CE中。该SCI可以是第一级SCI，也可以是第二级SCI。第一信息可以是SCI中的比特，即使用SCI中的一个比特位来指示第一设备是否向第二设备请求资 源辅助信息。例如，第一设备向第二设备发送的SCI中一个比特位的取值为“1”时，指示第一设备向第二设备发送了第一信息，第一设备此时向第二设备请求提供资源辅助信息；第一设备向第二设备发送的SCI中一个比特位的取值为“0”时，指示第一设备此时未向第二设备请求提供资源辅助信息。同时，SCI调度的PSSCH中还可以携带以下一个或多个参数：优先级、使用的资源池、剩余数据时延(packet delay budget，PDB)、子信道个数和预留周期等。其中，优先级可以是第一设备向第三设备发送的数据的优先级；使用的资源池可以是进行侧行链路通信的第一设备和第三设备的共同资源池；剩余PDB可以是一个时间窗口，第一设备期待在这个时间窗口内接收到资源辅助信息；子信道个数是进行感知(sensing)时使用的选择资源的频域粒度；预留周期是第一设备待发送的业务类型，包括非周期、周期或者周期长度等。
或者，在另一种具体的实现方式中，第一信息还可以是第一设备向第二设备发送的SCI。该SCI为一种新的SCI格式。该SCI格式专用于请求辅助资源信息。例如，所述SCI格式携带的字段包括：以下一个或多个参数：优先级、使用的资源池、剩余PDB、子信道个数和预留周期等。可选地，所述SCI可以是第一级SCI或第二级SCI。
S102、第二设备向第一设备发送第二信息，所述第二信息用于指示第二设备为第一设备提供资源辅助信息，或者，第二信息用于指示第二设备不为第一设备提供资源辅助信息；相应地，第一设备接收第二设备发送的第二信息，使得第一设备能够根据第二信息，确定第二设备是否为第一设备提供资源辅助信息。
具体地，本实施例提供的通信方法中，第二设备在接收到第一设备发送的第一信息之后，无论是否可以为第一设备提供资源辅助信息，都可以在S102中向第一设备发送第二信息。例如，第二设备确定可以为第一设备提供资源辅助信息，则第二设备在S102中发送的第二信息指示第二设备为第一设备提供资源辅助信息；第二设备确定无法为第一设备提供资源辅助信息，则第二设备在S102中发送的第二信息指示第二设备不为第一设备提供资源辅助信息。则对于第一设备，在接收到第二信息之后，可以根据第二信息确定第二设备是否能够为第一设备提供资源辅助信息。
更为具体地，本实施例提供的第二信息可以由PSFCH承载，并且第二信息与PSFCH的序列循环移位值的对应关系如下表1所示：
表1
第二信息 指示提供资源辅助信息 指示不提供资源辅助信息
序列循环移位值 6 0
具体地，在本实施例中，第二信息所指示的第二设备是否为第一设备提供资源辅助信息的两个结果“是”和“否”，可分别对应于PSFCH的序列循环移位值的两个取值。例如，在表1所示的示例中，当第二信息指示第二设备为第一设备提供资源辅助信息，则第二信息对应于PSFCH的第一序列循环移位值“6”；第一设备接收到PSFCH的序列循环移位值为6时，确定第二设备为第一设备提供资源辅助信息。当第二信息指示第二设备不为第一设备提供资源辅助信息，则第二信息对应于PSFCH的第二序列循环移位值“0”；第一设备接收到PSFCH的序列循环移位值为0时，确定第二设备不为第一设备提供资源辅助信息。
或者，在表2所示的示例中，当第二信息指示第二设备为第一设备提供资源辅助信息，则第二信息对应于PSFCH的第一序列循环移位值“0”；当第二信息指示第二设备不为第一设备提供资源辅助信息，则第二信息对应于PSFCH的第二序列循环移位值“6”。
表2
第二信息 指示提供资源辅助信息 指示不提供资源辅助信息
序列循环移位值 0 6
进一步地，在本实施例中承载第二信息的资源可以是第一资源集合内的PSFCH资源，其中，记用于传输承载第二信息的PSFCH资源的资源集合为第一资源集合，记用于传输承载HARQ-ACK的PSFCH资源的资源集合为第二资源集合。
在一种实现方式中，第一资源集合和第二资源集合互为补集。其中，由于第二设备除了可以通过PSFCH向第一设备发送第二信息，还可以通过PSFCH向第一设备发送HARQ信息，则在本实施例中，第二设备通过PSFCH资源划分的不同资源集合的方式，对承载第二信息的PSFCH和承载HARQ-ACK的PSFCH进行区分，从而对第二设备所发送的HARQ信息和第二信息进行区分。通过合理利用用于传输承载HARQ-ACK的PSFCH资源的资源集合的补集资源，提高了频谱利用效率，同时该补集资源可以用于传输资源辅助信息，提供了第一设备的传输可靠性。
在一种具体实现中，上述第一资源集合和第二资源集合可以用不同的比特图
(bitmap)来表示。即网络设备使用不同的比特图来独立配置第一资源集合和第二资源集合。其中，该不同的比特图可以为相同的长度。例如下表3示出了一种指示用于传输承载第二信息的PSFCH资源的资源集合对应的比特图，表4示出了一种指示用于传输承载HARQ信息的PSFCH资源的资源集合对应的比特图。其中，表3和表4是一个简略图示，频域为10个资源块(resource block，RB)，所述RB可以是物理资源块(physical resource block，PRB)，时域为6个时隙，并且PSFCH资源周期为2，即每2个时隙中有一个时隙存在PSFCH资源。在本发明中不对图示参数进行限定。
表3
  时隙n 时隙n+1 时隙n+2 时隙n+3 时隙n+4 时隙n+5
RB1   0   0   0
RB2   0   0   0
RB3   0   0   0
RB4   0   0   0
RB5   1   1   1
RB6   1   1   1
表4
  时隙n 时隙n+1 时隙n+2 时隙n+3 时隙n+4 时隙n+5
RB1   1   1   1
RB2   1   1   1
RB3   1   1   1
RB4   1   1   1
RB5   0   0   0
RB6   0   0   0
其中，可以通过表3中比特图的“000011”来指示用于传输承载第二信息的PSFCH资源的资源集合，可以通过表4中比特图的“111100”来指示用于传输承载HARQ信息的PSFCH资源的资源集合，可以看出在在时隙n+1，n+3和n+5中每个时隙内，承载第二信息和承载HARQ信息的PSFCH资源互为补集。
在另一种具体实现中，上述第一资源集合和第二资源集合可以用指示二资源集合的比特图(bitmap)来指示。即网络设备使用比特图来联合配置第一资源集合和第二资源集合。例如下表5示出了一种指示用于传输承载HARQ信息的PSFCH资源的资源集合对应的比特图。其中，表5是一个简略图示，频域为10个RB，时域为6个时隙，并且PSFCH资源周期为2，即每2个时隙中有一个时隙存在PSFCH资源。在本发明中不对图示参数进行限定。
表5
  时隙n 时隙n+1 时隙n+2 时隙n+3 时隙n+4 时隙n+5
RB1   1   1   1
RB2   1   1   1
RB3   1   1   1
RB4   1   1   1
RB5   0   0   0
RB6   0   0   0
其中，表5中比特图的“111100”来指示用于传输承载HARQ信息的PSFCH资源的资源集合，由于第一资源集合和第二资源集合互为补集，则用于传输承载第二信息的PSFCH资源的资源集合则为表5中比特图中指示为“0”的位置对应的资源集合，可以看出在在时隙n+1，n+3和n+5中每个时隙内，承载第二信息和承载HARQ信息的PSFCH资源互为补集。
在另一种实现方式中，上述第一资源集合和第二资源集合可以用不同的比特图(bitmap)来表示。即网络设备使用不同的比特图来独立配置第一资源集合和第二资源集合。其中，该不同的比特图为不同的长度。记第一资源集合对应的比特图为第一比特图，第二资源集合对应的比特图为第二比特图。第一比特图的长度要小于或者等于第二比特图中指示为0的资源块RB。例如下表6示出了一种指示用于传输承载第二 信息的PSFCH资源的资源集合对应的比特图，表7示出了一种指示用于传输承载HARQ信息的PSFCH资源的资源集合对应的比特图。其中，表6和表7是一个简略图示，频域为10个RB，时域为6个时隙，并且PSFCH资源周期为2，即每2个时隙中有一个时隙存在PSFCH资源。在本发明中不对图示参数进行限定。
表6
  时隙n 时隙n+1 时隙n+2 时隙n+3 时隙n+4 时隙n+5
RB5   1   1   1
RB6   1   1   1
表7
  时隙n 时隙n+1 时隙n+2 时隙n+3 时隙n+4 时隙n+5
RB1   1   1   1
RB2   1   1   1
RB3   1   1   1
RB4   1   1   1
RB5   0   0   0
RB6   0   0   0
其中，可以通过表6中比特图的“11”来指示用于传输承载第二信息的PSFCH资源的资源集合，可以通过表7中比特图的“111100”来指示用于传输承载HARQ信息的PSFCH资源的资源集合，可以看出在在时隙n+1，n+3和n+5中每个时隙内，承载第二信息和承载HARQ信息的PSFCH资源互为补集。
可选地，记S101中第一设备在第一时隙向第二设备发送第一信息、S102中第二设备在第二时隙向第一设备发送第二信息。则在一些场景中，第一时隙和第二时隙之间的相对关系可以至少满足以下条件，第二时隙是第一信息的最后一个符号所在时隙之后的、包括PSFCH的第一个时隙，或者，第二时隙可以是第一时隙后，间隔N个时间单元后的、包括PSFCH的第一个时隙，N为正整数。作为示例，如图3所示的时隙可以为不包括PSFCH的时隙、如图4所示的时隙可以为包括PSFCH的时隙。
综上，本实施例提供的通信方法，当第一设备向第二设备发送第一信息后，第二设备向第一设备发送第二信息，用于指示第二设备是否为第一设备提供资源辅助信息。这里第二设备是否为第一设备提供资源辅助信息，可以理解为，第二信息可用于指示第二设备为第一设备提供资源辅助信息或者第二信息还可用于指示第二设备不为第一设备提供资源辅助信息。使得第一设备能够根据第二设备所反馈的第二信息的指示，确定第二设备是否能够提供资源辅助信息。因此，第一设备能够根据第二信息至少确定：①第二设备接收到了第一信息，从而确保了第一设备发送的第二信息的可靠性。②第二设备是否提供资源辅助信息，使得第一设备可以及时跟进第二信息，确定是否继续等待第二设备发送的资源辅助信息，或者尽快放弃等待第二设备发送资源辅助信 息，从而能够减少终端设备一直等待第二设备提供资源辅助信息时延，进而减少了数据传输的时延，提高了第一设备进行侧行链路通信时的通信效率和传输的可靠性，还提高了频谱利用率。
实施例二
进一步地，在上述实施例的S102中，以具体实现的方式给出了第二设备向第一设备发送的第二信息的一种示例，也即，第二信息可以指示第二设备为第一设备提供资源辅助信息、也可以指示第二设备不为第一设备提供资源辅助信息，记为第一种实现方式。而在第二种实现方式中，第二信息可以仅用于指示第二设备为第一设备提供资源辅助信息，而不用于指示第二设备不为第二设备提供资源辅助信息。
图7为本申请提供的通信方法一实施例的流程示意图，如图7所示的方法中，除了如下表8所示的第二信息与PSFCH的序列循环移位值的对应关系，其他的实现与如图6所示相同，可以理解为对图6所示实施例的等效替换。
具体地，本实施例提供的第二信息可以由PSFCH承载，并且第二信息与PSFCH的序列循环移位值的对应关系如下表8所示：
表8
第二信息 指示提供资源辅助信息 指示不提供资源辅助信息
序列循环移位值 6 N/A
具体地，在本实施例中，第二信息指示第二设备为第一设备提供资源辅助信息，对应于PSFCH的序列循环移位值的一个取值。在表8所示的示例中，当第二信息指示第二设备为第一设备提供资源辅助信息，则第二信息对应于PSFCH的第三序列循环移位值“6”；第一设备接收到PSFCH的序列循环移位值为6时，确定第二设备为第一设备提供资源辅助信息。第一设备没有接收到承载第二信息的PSFCH，确定第二设备不为第一设备提供资源辅助信息。因此，表8所示的实现与实施例一种的表1和表2相比，改变了对第二信息的定义，与表1和表2相比更有效率，同时减少了第二设备发送的信息的数量，提高了系统通信的效率。
实施例三
对于上述图6所示的实施例中，以承载第二信息的资源可以具体是第一资源集合内的PSFCH资源作为示例，在另一种可能的实现方式中，如图6所示的S102中，第二设备向第一设备所发送的第二信息还可以使用新的PSFCH格式传输。该新的PSFCH格式可以承载多个比特位。这多个比特位可以用于指示第二信息和HARQ信息。即，第二信息可以用于指示第二设备是否向第一设备提供资源辅助信息以及是否成功接收第一设备发送的数据。也就是说，本实施例中多个比特位既可以指示第二信息、又可以指示HARQ信息，因此第二设备可以不用通过不同的资源，对第二设备发送的HARQ信息和第二信息进行区分。
具体地，在本实施例中，以第二信息对应于PSFCH格式相应的2个比特位为例，这多个比特位与第二信息、HARQ信息之间的对应关系可以如下表9所示：
表9
Figure PCTCN2021108482-appb-000001
其中，本发明不限制比特位的值和HARQ信息加第二信息之间的对应关系。表9中的对应关系也可以是其他对应关系。如表9所示，当PSFCH的2个比特位的值为00时，对应于NACK+(加或和)指示不提供资源辅助信息，也即，第二设备没有成功接收PSCCH调度的PSSCH，以及第二设备不为第一设备提供资源辅助信息；当PSFCH的2个比特位的值为01时，对应于NACK+(加或和)指示提供资源辅助信息，也即，第二设备没有成功接收PSCCH调度的PSSCH，以及第二设备为第一设备提供资源辅助信息；当PSFCH的2个比特位的值为11时，对应于ACK+(加或和)指示提供资源辅助信息，也即，第二设备成功接收PSCCH调度的PSSCH，以及第二设备为第一设备提供资源辅助信息；当PSFCH的2个比特位的值为10时，对应于ACK+(加或和)指示不提供资源辅助信息，也即，第二设备成功接收PSCCH调度的PSSCH，以及第二设备不为第一设备提供资源辅助信息。
在另一种可能的实现方式中，如图6所示的S102中，第二设备向第一设备所发送的第二信息还可以使用PSFCH传输。PSFCH可以承载1比特，使用不同的PSFCH序列循环偏移值来指示第二信息和HARQ信息。即，1比特和PSFCH的序列循环移位用于指示第二设备为第一设备提供资源辅助信息，以及是否成功接收第一设备发送的数据。也就是说，本实施例中PSFCH既可以指示第二信息、又可以指示HARQ信息，因此第二设备可以不用通过不同的资源，对第二设备发送的HARQ信息和第二信息进行区分。
具体地，在本实施例中，以第二信息对应于PSFCH中的1比特为例，这1比特，PSFCH序列循环偏移与第二信息、HARQ信息之间的对应关系可以如下表10所示：
表10
Figure PCTCN2021108482-appb-000002
其中，如表10所示，m cs＝3的取值和HARQ-ACK信息的对应关系。当1比特的值为0并且序列循环移位为3时，对应于NACK+指示提供资源辅助信息，也即，第二设备没有成功接收PSCCH调度的PSSCH，以及第二设备为第一设备提供资源辅助信息；当1比特的值为1时，对应于ACK+指示提供资源辅助信息，也即，第二设备成功接收PSCCH调度的PSSCH，以及第二设备为第一设备提供资源辅助信息。即通过序列循环移位值来指示第二设备为第 一设备提供资源辅助信息，并且第二设备是否成功接收来自第一设备的数据。
可选地，在本实施例中，记第一设备在第一时隙向第二设备发送第一信息、第二设备在第二时隙向第一设备发送第二信息，第一时隙和第二时隙之间的相对关系可以至少满足以下条件：第二时隙为第一时隙加上M个时间单元的时间间隔后之后、包括PSFCH的第一个时隙，所述反馈时间间隔配置在资源池上，M为正整数。M可以是2或者3，时隙可以是资源池内的逻辑时隙。
可选地，本实施例中第二信息可以承载在传输PSFCH资源的资源集合内，也就是说，承载第二信息的PSFCH，可以使用PSSCH的时域位置和频域位置隐式关联确定PSFCH的频域和/或码域资源。下面对上述隐式关联规则进行简要描述。
其中，一个设备(或称为终端设备、UE)会被提供资源池中的一个
Figure PCTCN2021108482-appb-000003
个PRB的集合，UE在这个集合中的一个PRB上进行PSFCH传输。资源池的子信道个数记为N subch，和这个PSFCH时隙相关联的PSSCH时隙的个数为
Figure PCTCN2021108482-appb-000004
UE为时隙i和子信道j从
Figure PCTCN2021108482-appb-000005
个PRB中分配
Figure PCTCN2021108482-appb-000006
个PRB。其中，
Figure PCTCN2021108482-appb-000007
并且这个分配从i的升序顺序开始，i遍历结束后继续使用j的升序顺序遍历。UE期待
Figure PCTCN2021108482-appb-000008
是
Figure PCTCN2021108482-appb-000009
的倍数。一个UE根据公式
Figure PCTCN2021108482-appb-000010
确定可用于传输PSFCH的资源的个数。其中
Figure PCTCN2021108482-appb-000011
是资源池的循环偏移对数。
Figure PCTCN2021108482-appb-000012
则
Figure PCTCN2021108482-appb-000013
个PRB和相应PSSCH的起始子信道相关联，
Figure PCTCN2021108482-appb-000014
则
Figure PCTCN2021108482-appb-000015
个PRB和PSSCH相应的一个或多个
Figure PCTCN2021108482-appb-000016
子信道相关联。
Figure PCTCN2021108482-appb-000017
是配置在资源池上的。PSFCH资源首先按照PRB的索引在
Figure PCTCN2021108482-appb-000018
个PRB中进行升序的排序，然后从
Figure PCTCN2021108482-appb-000019
个循环偏移对中根据循环偏移对索引的升序顺序排序。一个UE根据
Figure PCTCN2021108482-appb-000020
确定一个PSFCH资源的索引，其中P ID是第二级SCI中提供的物理层源ID，M ID为0或者是接收PSSCH的UE被高层指示的标识(identity)。
综上，本实施例提供的通信方法，除了第二设备可以向第一设备发送第二信息，用于指示第二设备是否为第一设备提供资源辅助信息。或者第二信息用于指示第二设备为第一设备提供资源辅助信息。使得第一设备能够根据第二设备所反馈的第二信息，确定第二设备是否能够提供资源辅助信息，从而减少终端设备一直等待第二设备提供资源辅助信息带来的时延，进而提高了第一设备进行侧行链路通信时的通信效率。同时，本实施例中的第二设备，通过向第一设备发送的PSFCH同时指示第二信息和HARQ信息，能够最大程度地利用现有PSFCH格式，提高资源利用率，且对现有的PSFCH更改较少，更有助于实现与推广。
在上述实施例一、实施例二和实施例三中，第二设备向第一设备发送的第二信息可以 由PSFCH承载，而在其他可能的实现方式中，第二信息还可以由新定义的信道(记为第一信道)承载。例如，新定义的第一信道可以被命名为(a new sidelink respond channel，PSRCH)等，本实施例对新定义的第一信道的名称不做限定，其功能上可用于承载第二信息即可。
实施例四
则如图6所示的实施例中，若第二信息由PSRCH承载，则第二信息与PSRCH的序列循环移位值的对应关系如下表11所示：
表11
第二信息 指示提供资源辅助信息 指示不提供资源辅助信息
第二信息的值 1 0
序列循环移位值 6 0
其中，第二信息所指示的第二设备是否为第一设备提供资源辅助信息的两个结果“是”和“否”，可分别对应第二信息的值为1和0，可分别对应于PSRCH的序列循环移位值的两个取值。在本发明中不对第二信息和第二信息的值之间的映射，以及第二信息与序列循环移位值之间的映射关系进行限定。例如，在表1所示的示例中，当第二信息指示第二设备为第一设备提供资源辅助信息，则第二信息对应于PSRCH的第一序列循环移位值“6”；第一设备接收到PSRCH的序列循环移位值为6时，确定第二设备为第一设备提供资源辅助信息。当第二信息指示第二设备不为第一设备提供资源辅助信息，则第二信息对应于PSRCH的第二序列循环移位值“0”；第一设备接收到PSRCH的序列循环移位值为0时，确定第二设备不为第一设备提供资源辅助信息。
可选地，记第一设备在第一时隙向第二设备发送第一信息、第二设备在第二时隙向第一设备发送第二信息。则在一些场景中，第一时隙和第二时隙之间的相对关系可以至少满足以下条件，第二时隙是第一信息的最后一个符号所在时隙之后的、包括PSRCH的第一个时隙，或者，第二时隙可以是第一时隙后，间隔P个时间单元后的、包括PSRCH的第一个时隙，P为正整数，时间单元可以是时隙，也可以是其他衡量时间的时间单位，本发明中对此不做限定。例如为2或者3，时隙可以是资源池内的逻辑时隙。
进一步地，在本实施例中，当资源池内存在PSFCH资源，则承载第二信息的资源可以具体是第三资源集合内的PSRCH资源。记用于传输承载第二信息的PSRCH资源的资源集合为第三资源集合，记用于传输承载HARQ-ACK的PSRCH资源的资源集合为第四资源集合。第三资源集合和第四资源集合互为补集。其中，由于第二设备除了可以通过PSRCH向第一设备发送第二信息，还可以通过PSFCH向第一设备发送HARQ信息，则在本实施例中，第二设备通过划分的不同资源集合的方式，对第二设备所发送的承载HARQ信息的PSRCH和承载第二信息的PSRCH进行区分。
例如，上述第三资源集合和第四资源集合可以通过比特图的方式来表示，在第一种具体的实现中，可以通过两个独立的比特图分别配置第三资源集合和第四资源集合，例如，通过比特图的“000011”来指示承载第二信息的PSRCH资源，通过比特图的“111100”来指示承载HARQ信息的PSFCH资源，可以看出在单个时隙内，承载第二信息的PSRCH资源和承载HARQ信息的PSFCH资源互为补集。或者，在第二种具体的实现中，可以通过比特图联合配置第三资源集合和第四资源集合，例如，通过比特图“111100”来指示承载HARQ 信息的PSFCH资源，则用于传输第二信息的PSRCH资源的资源集合为比特图“111100”中指示为“0”的位置对应的资源集合。可以看出在单个时隙内，承载第二信息的PSRCH资源和承载HARQ信息的PSFCH资源互为补集。又或者，在第三种具体的实现中，可以通过两个独立且长度不同的比特图分别配置第三资源集合和第四资源集合。例如，通过比特图“111100”来指示承载HARQ信息的PSFCH资源，同时，通过比特图“11”来指示承载第二信息的PSRCH资源，其中，比特图“11”具体在承载HARQ信息的PSFCH资源的补集中，指示承载第二信息的PSRCH资源。
当资源池内不存在PSFCH资源，则该资源池无法用于配置PSRCH来承载第二信息。或者，图8为一种时隙结构的示意图，如图8所示的时隙内，所配置的PSRCH可以占用资源池的除GP外的最后一个符号，即为图中倒数第二个PSFCH，并且重复一个符号。用于传输PSRCH的资源的集合和用于传输PSFCH的资源的集合独立配置，并且采用频分复用的配置方式，则在如图8所示的时隙内，当PSFCH的配置周期为1、2、4时，PSRCH的配置周期等于PSFCH的配置周期，当PSFCH的配置周期为0时，PSRCH的配置周期为0、1、2或者4，也可以是其他数值，本发明中对此不做限定。
实施例五
在如图7所示的示例中，若第二信息由PSRCH承载，则第二信息与PSRCH的序列循环移位值的对应关系如下表12所示：
表12
第二信息 指示提供资源辅助信息 指示不提供资源辅助信息
第二信息的值 1 0
序列循环移位值 6 N/A
具体地，在本实施例中，第二信息所指示的第二设备为第一设备提供资源辅助信息，可单独对应于PSRCH的序列循环移位值的一个取值。在表4所示的示例中，当第二信息指示第二设备为第一设备提供资源辅助信息，则第二信息对应于PSRCH的第三序列循环移位值“6”；第一设备接收到PSRCH的序列循环移位值为6时，确定第二设备为第一设备提供资源辅助信息。第一设备没有接收到PSRCH时，确定第二设备不为第一设备提供资源辅助信息。
上述实施例一到实施例五中，示出了承载第二信息的第一信道可以是PSFCH或者PSRCH等。除此之外，在其他一种可能的实现方式中，所述第一信道还可以是PSCCH，则第二信息可以由PSCCH承载，即第二信息为第一级SCI中的1比特，该1比特为一个字段，用于指示第二设备为设备提供资源辅助信息，或者用于指示第二设备不为第一设备提供资源辅助信息。该1比特可以为第一级SCI中的预留比特中LSB最小的1比特，或者该1比特可以为第一级SCI中的预留比特中MSB最大的1比特。
在另一种可能的实现方式中，第一信道还可以是PSSCH，则第二信息可以由PSSCH承载，即第二信息为第二级SCI中的1比特，该1比特为一个字段，用于指示第二设备为设备提供资源辅助信息，或者用于指示第二设备不为第一设备提供资源辅助信息。该1比特可 以为第二级SCI中的预留比特中LSB最小的1比特，或者该1比特可以为第二级SCI中的预留比特中MSB最大的1比特。
在另一种可能的实现方式中，第二信息可以由第一序列来指示，可以通过以下的序列参数中的一种或多种来指示所述第二信息：序列的循环移位值，序列的跟序列号，序列的正交覆盖掩码(orthogonal cover code,OCC)。第一序列可以包括参考信号的序列，参考信号包括PSSCH的DMRS(demodulation reference signal)，PSCCH的DMRS，PTRS(phase tracking reference signal)，CSI-RS(channel state information reference signal)中的一个或多个。第一序列还可以包括传输第一信道使用的序列，即第一序列可以是传输PSFCH使用的序列，或者，第一序列可以是传输PSRCH使用的序列。
在另一种可能的实现方式中，第二信息可以由MAC CE(medium access control control element)指示。该MAC CE可用于携带资源辅助信息。第二信息可以为该MAC CE中的1个比特位。或者该MAC CE携带资源辅助信息即表示同意提供资源辅助信息。或者该MAC CE携带资源辅助信息以及确定该资源辅助信息使用的用于感知的优先级，子信道个数，使用的资源池，预留周期，预留资源的次数等参数中的一个或多个参数。
可选地，在上述实施例一至实施例五中，针对第一设备在希望获取资源辅助信息时，可以主动向第二设备发送第一信息来请求第二设备发送资源辅助信息。而在一种可能的实现中，第二设备也可以在第一设备未发送第一信息的情况下直接由第二设备在S102中主动向第一设备发送第二信息，来指示第二设备可以为第一设备提供资源辅助信息。例如，图6A为本申请提供的通信方法一实施例的流程示意图，如图6A可以作为图6所示实施例的等效替换，也就是在图6A所示的实施例中，第一设备不执行S101的情况下，第二设备可以向第一设备发送第二信息，S102的具体实现与如图6所示相同，不再赘述。又例如，图7A为本申请提供的通信方法一实施例的流程示意图；如图7A可以作为图7所示实施例的等效替换，也就是在图7A所示的实施例中，第一设备不执行S101的情况下，第二设备可以向第一设备发送第二信息，S102的具体实现与如图7所示相同，不再赘述。
进一步地，在上述实施例一至实施例五中，针对第一设备向第二设备发送第一信息请求获取资源辅助信息，第二设备向第一设备反馈第二信息来指示是否为第一设备提供资源辅助信息的过程，或第二设备向第一设备反馈第二信息来指示为第一设备提供资源辅助信息的过程，而在此之后，第一设备所执行的后续动作也与第二信息的具体指示有关。下面结合附图，通过实施例六到实施例八，对第一设备接收到第二信息之后的步骤进行说明。
实施例六
图9为本申请提供的通信方法一实施例的流程示意图，示出了在上述实施例一到实施例五的基础上，当第二设备在S102中向第一设备发送的第二信息，用于指示第二设备能够为第一设备提供资源辅助信息之后，还包括：
S103：第二设备向第一设备发送资源辅助信息。
S104：第一设备参考第二设备发送的资源辅助信息，确定其与第三设备进行侧行链路通信时使用的通信资源。
S105：第一设备使用S104中所确定的通信资源进行侧行链路通信，具体可以向第三设 备发送侧行链路通信数据。
实施例七
图10为本申请提供的通信方法一实施例的流程示意图，示出了在上述实施例一、实施例三和实施例四的基础上，当第二设备在S102中向第一设备发送的第二信息，用于指示第二设备不为第一设备提供资源辅助信息之后，还包括：
S203：第一设备在无法接收到第二设备发送的资源辅助信息的情况下，采用其他方式确定进行侧行链路通信时使用的通信资源。
具体地，由于第一设备根据第二信息确定了第二设备不为其提供资源辅助信息，则第一设备可以采用其他方式确定通信资源。例如，第一设备可以向第四设备发送第一信息，以请求第四设备向第一设备提供资源辅助信息；或者，第一设备还可以自行通过sensing、partial sensing或者随机选择的方式，确定通信资源。此处，通信资源可以理解为资源或者时频资源。
S204：第一设备使用S203中确定的通信资源进行侧行链路通信，可以向第三设备发送侧行链路通信数据。
综上，本实施例提供的通信方法，使得第一设备在根据第二信息确定第二设备不能提供资源辅助信息后，可以采用其他方式确定通信资源，从而不需要如图5所示的现有技术中，一直等待接收资源辅助信息，从而能够减少终端设备一直等待第二设备提供资源辅助信息所带来的时延，进而提高了第一设备进行侧行链路通信时的通信效率。
实施例八
图11为本申请提供的通信方法一实施例的流程示意图，示出了在上述实施例一到实施例五的基础上，当第一设备在S101向第二设备发送第一信息之后，假设第二设备没有接收到第一信息的场景，则在S101之后还包括：
S301：第一设备发送第一信息之后，在第一时间段内没有接收到第二设备发送的信息。也即，没有接收到第二设备发送的确定能为第一设备提供资源辅助的信息或第二设备发送的确定是否为第一设备提供资源辅助的信息，相当于第一设备无法确定第二设备是否为其提供资源辅助信息。或者，在S301中还可以是，第一设备在发送第一信息之后，在第一时间段内没有接收到来自第二设备的资源辅助信息或时频资源信息。
可选的，第一信息可以为SCI或MAC CE或PC5RRC，即可以承载在PSCCH和PSSCH中。其中，SCI可以为第一级SCI或第二级SCI。
S302：第一设备在第一时间段之后，采用其他方式确定进行侧行链路通信时使用的通信资源。
具体地，第一设备可以继续向第二设备发送第一信息，防止第二设备没有接收到第一信息；或者，第一设备可以向第四设备发送第一信息，以请求第四设备向第一设备提供资源辅助信息；或者，第一设备还可以自行通过sensing、partial sensing或者随机选择的方式，确定通信资源。
可选地，所述第一时间段可以是预配置的、可以是配置的、可以是预定义的，可以是规定的、也可是第一设备或者第二设备的用户指定的。其中，所述第一时间段可以是网络 设备通过RRC层或者MAC CE配置的，也可以是第一设备通过PC5RRC配置的。该第一时间段可以保证第一设备侧行通信的时延。避免长时间等待资源辅助信息所带来的时延。
可选地，第一信息包括第一时间段。该第一时间段可以保证第一设备侧行通信的时延。避免长时间等待资源辅助信息所带来的时延。
S303：第一设备使用S302中确定的通信资源进行侧行链路通信，具体可以向第三设备发送侧行链路通信数据。
综上，本实施例提供的通信方法，第一设备可以在第一时间段内未接收到第二信息或资源辅助信息的情况下，采用其他方式确定通信资源，而不是一直等待第二设备的响应，从而可以在减少时延的同时，在一些情况下，假设第二设备间隔较长时间才向第一设备提供资源辅助信息，此时的资源辅助信息无法给第一设备确定通信资源带来增益，第一设备应在第一时间段之后，就采用其他方式确定获取资源辅助信息，因此本实施例还可以保证数据传输的时延要求和可靠性，提高资源辅助信息的时效性。
在一些具体的实现中，第一设备在进行侧行链路通信时，有待发送的数据则需要确定通信资源进行侧行通信，此时会向第二设备发送第二信息来请求获取资源辅助信息，进而确定通信资源。第一设备可能会在短时间内频繁向同一个第二设备请求获取资源辅助信息，而为了减少频繁的信令交互带来的通信开销和信令开销，在本实施例的一种具体实现中，当第一设备向第二设备第一次发送第一信息后，若第二设备向第一设备发送的第二信息用于指示第二设备向第一设备提供资源辅助信息，则第二设备在随后的第二时间段内，可以不再向第一设备发送第二信息。其具体的实现包括以下的实施例九和实施例十。
实施例九
图12为本申请提供的通信方法一实施例的流程示意图，如图12所示的方法，示出了在前述实施例一到实施例五的基础上，若第二设备在S102中向第一设备发送的第二信息用于指示第二设备为第一设备提供资源辅助信息，则在S102之后，还包括：
S401：第一设备和第二设备之间建立连接关系，其中，所述连接关系是在第一设备接收到第二信息之后建立的“虚拟”关系，并在第二时间段内，第一设备和第二设备之间都保持所建立的连接关系，第二设备可以持续向第一设备提供资源辅助信息。
S402：在第二时间段内，第一设备若向第二设备发送第一信息，请求第二设备向第一设备提供资源辅助信息，则第二设备可以不向第一设备发送第二信息来指示其可以为第一设备提供资源辅助信息，而是直接通过S403，向第一设备发送资源辅助信息。可以理解的是，在第二时间段内，S402和S403可以反复执行多次。
可选地，所述第二时间段可以是预配置的、可以是配置的、可以是预定义的，可以是规定的、也可是第一设备或者第二设备的用户指定的。其中，所述第二时间段可以是网络设备通过RRC层或者MAC CE配置的，也可以是第一设备通过PC5RRC配置的。该第二时间段避免频繁的信令交互所带来的信令开销，减少了系统开销。
S404：随后，当第二时间结束之后，第一设备和第二设备之间断开S401中所建立的连接关系，由于该连接关系是“虚拟”的，断开连接关系可以理解为在第二时间段之后，若第一设备再向第二设备发送第一信息，请求第二设备向第一设备提供资源辅助信息，则第 二设备需要根据如本申请实施例一或者实施例二的方式向第一设备发送第二信息。
综上，本实施例提供的通信方法，能够在第一设备连续向第二设备请求资源辅助信息的场景下，第二设备只向第一设备发送第二信息后，二者可以通过所建立的连接关系，当第一设备在第二时间段再向第二设备发送第一信息，第二设备可以在不发送第二信息的情况下直接向第一设备提供资源辅助信息，从而减少了第一设备和第二设备之间的信息交互，进一步提高通信效率。
实施例十
图13为本申请提供的通信方法一实施例的流程示意图，如图12所示的方法可以理解为如图12所示方法中，S402-S403的等效替换。也就是说，在S401第一设备和第二设备之间建立连接关系之后，还包括：
S501、第二设备周期性地向第一设备发送资源辅助信息。
其中，在第二时间段内，第二设备可以在第一设备没有发送第一信息请求获取资源辅助信息的情况下，主动向第一设备发送资源辅助信息。
其中，所述周期性发送的周期可以是预配置的、可以是配置的、可以是预定义的，可以是规定的、也可是第一设备或者第二设备的用户指定的。其中，所述第一时间段可以是网络设备通过RRC层或者MAC CE配置的，也可以是第一设备通过PC5RRC配置的。该第一时间段可以保证第一设备侧行通信的时延。避免长时间等待资源辅助信息所带来的时延。
在一种实现方式中，第一信息包括周期性提供资源辅助信息的周期，在一个周期内为一个传输块预留的资源个数上限等信息中的一个或多个。
综上，本实施例提供的通信方法，能够在第一设备连续向第二设备请求资源辅助信息的场景下，第二设备只需要向第一设备发送一次第二信息后，二者可以通过所建立的连接关系，第二设备主动向第一设备周期性发送资源辅助信息，从而进一步减少了第一设备和第二设备之间信息的交互，还提高了第一设备向第二设备请求资源辅助信息的智能化程度，并进一步提高了通信效率。
实施例十一
在上述实施例九和实施例十的基础上，第一设备和第二设备之间所建立的连接关系，可以理解为“请求资源-提供资源”的“虚拟”连接关系，该连接关系的持续时间可以是一个时间窗口或者是一个定时器(timer)，时间窗口或者定时器的总时长为第二时间段。
例如，当第一设备接收到来自第二设备的第二信息，该第二信息用于指示第二设备能够为第一设备提供资源辅助信息后，第一设备可以开启或激活一个timer来控制上述连接；又例如，当第一设备接收到第二设备发送的第二信息，并且第二信息用于指示第二设备能够为第一设备提供资源辅助信息后，第一设备可以在一个时间窗口内保持该连接。则当处于timer的激活时间内、或者时间窗口的保持时间内，第一设备向第二设备发送的第一信息后，第二设备无需向第一设备发送第二信息。
可选地，所述时间窗口的配置可以使用预配置pre-configured或网络设备使用RRC层配置或者第一设备通过PC5-RRC配置实现。
在一种实现方式中，所述时间窗口可以承载在第一信息中，即来自第二设备的第二信 息携带了时间窗口信息，向第二设备指示了等待接收来自第二设备的第二信息的时间。保证第二设备可以在该时间窗口内发送第二信息。保证第一设备待发送数据的时延要求。
在一种实现方式下，在一个资源池上可以配置多个时间窗口的时间长度值。则第一设备可以使用第一级SCI或者第二级SCI中的1比特指示多个时间窗口的时间长度值中的一个值。
或者，第一设备使用第一信息中的优先级关联多个时间窗口中的其中一个时间长度值。例如第一信息中的优先级为8个等级，分别使用1,2,3,4,5,6,7,8来表示，其中，优先级值越低则优先级越高。当时间窗口的时间长度值为A，B，C，D时，其中A，B，C，D都是整数，并且单位为时隙，符号或者绝对时间毫秒。并且A<B<C<D。则优先级和时间窗口的映射关系可以为：优先级值为1-2，则时间窗口为D；优先级值为3-4，则时间窗口为C；优先级值为5-6，则时间窗口为B；优先级值为7-8，则时间窗口为A。
又或者，第一设备根据第一信息中的PDB、或者剩余PDB可以对应于时间窗口中的其中一个时间长度值。并且PDB/剩余PDB所对应的时间窗口的时间长度值，应小于或等于PDB/剩余PDB的时间长度值。此时可以保证第一设备发送数据的时延要求。
一种实现方式中，PDB/剩余PDB所对应的时间窗口的时间长度值，应小于或等于PDB/剩余PDB的时间长度值。并且时间窗口的时间长度值为满足小于或等于PDB/剩余PDB的时间长度值中最大的值。或者为时间窗口的时间长度值为满足小于或等于PDB/剩余PDB的时间长度值的最小的值。或者为时间窗口的时间长度值为满足小于或等于PDB/剩余PDB的时间长度值的均值，该均值为算法平均值。
在上述实施例九到实施例十一中，在第二时间段之间第一设备和第二设备之间建立的连接关系，可以通过信令指示的方式断开。
实施例十二
图14为本申请提供的通信方法一实施例的流程示意图，示出了如图12所示的实施例中，S401之后，当第一设备和第二设备之间建立连接关系，随后，第二设备可以在S601中向第一设备发送中断信息，则当第一设备接收到中断信息后，在S602中，断开第一设备和第二设备之间所建立的连接关系。可以理解的是，在S602之后，若第一设备再向第二设备发送第一信息，第二设备将会按照本申请实施例一到实施例五中任一的方式向第一设备反馈其是否能够提供资源辅助信息或者向第一设备反馈其能够提供资源辅助信息。
实施例十三
图15为本申请提供的通信方法一实施例的流程示意图，示出了如图13所示的实施例中，S401之后，当第一设备和第二设备之间建立连接关系，随后，第二设备可以在S701中向第一设备发送中断信息、或者，第一设备也可以在S702中向第二设备发送中断信息。其中，S701和S702可以择一实现。则在S703中，当第一设备或者第二设备接收到中断信息之后，断开第一设备和第二设备之间所建立的连接关系。在S703之后，若第一设备再向第二设备发送第一信息，第二设备将会按照本申请实施例一到实施例五中任一的方式向第一设备反馈其是否能够提供资源辅助信息。
可选地，上述实施例十二和实施例十三中所述的中断信息，可以具体通过第一级SCI 或者第二级SCI中的1比特来指示，例如，可以是SCI内的一个字段、或者预留比特(预留比特位的MSB最大的位置，或LSB最小的位置)，又或者是MAC CE(control element)信令。或者是RRC信令，MAC信令，MIB信令，SIB信令。或者是PC5RRC信令。
在前述实施例中，对本申请实施例提供的通信方法进行了介绍，而为了实现上述本申请实施例提供的通信方法中的各功能，作为执行主体的第一设备和第二设备可以包括硬件结构和/或软件模块，以硬件结构、软件模块、或硬件结构加软件模块的形式来实现上述各功能。上述各功能中的某个功能以硬件结构、软件模块、还是硬件结构加软件模块的方式来执行，取决于技术方案的特定应用和设计约束条件。
例如，图16为本申请提供的通信装置一实施例的结构示意图，该通信装置1600包括：处理模块1601和通信模块1602。
如图16所示的通信装置可以作为第一设备，执行本申请前述任一实施例中，由第一设备执行的步骤。
例如，通信模块1602可用于接收来自第二设备的第二信息；其中，第二信息指示第二设备为第一设备提供资源辅助信息。
可选地，第二信息用于指示第二设备为第一设备提供资源辅助信息；或者，第二信息用于指示第二设备是否为第一设备提供资源辅助信息。
可选地，通信模块1602还用于，向第二设备发送第一信息；其中，第一信息用于请求获取资源辅助信息。
可选地，第二信息由第一信道承载。
可选地，当第二信息指示第二设备为第一设备提供资源辅助信息，第二信息对应于第一信道的第一序列循环移位值；当第二信息指示第二设备不为第一设备提供资源辅助信息，第二信息对应于第一信道的第二序列循环移位值；或者，当第二信息指示第二设备为第一设备提供资源辅助信息时，第二信息对应于第一信道的第三序列循环移位值。
可选地，第一信道为物理侧行链路反馈信道PSFCH；第二信息承载在第一资源集合内；其中，第一资源集合是传输PSFCH的资源集合中包括的，用于承载混合自动重传请求HARQ信息的资源集合的补集。
可选地，第一设备在第一时隙发送第一信息，第一设备在第二时隙接收第二信息；其中，第二时隙是第一信息的最后一个符号所在时隙之后的包括PSFCH的第一个时隙，或者，第二时隙是第一时隙后间隔N个时间单元后的包括PSFCH的第一个时隙，N为正整数。
可选地，第二信息承载在传输第一信道的资源集合内；其中，用于传输第一信道的资源的集合和用于传输PSFCH资源的集合频分复用；或者，用于传输第一信道的资源的集合和用于传输PSFCH资源的集合独立配置。
可选地，第二信息对应于第一信道的多个比特位，多个比特位用于指示第二设备是否为第一设备提供资源辅助信息，以及指示第二设备是否成功接收到第一设备发送的数据。
可选地，第二信息承载在传输PSFCH资源的集合内；其中，传输PSFCH资源的集合还用于第二设备向第一设备发送HARQ信息。
可选地，第一设备在第一时隙发送第一信息，第一设备在第二时隙接收第二信息；其中，第二时隙是第一时隙后间隔M个时间单元后的包括PSFCH的第一个时隙，M为正整数。
可选地，通信模块1602还用于向第四设备发送第一信息；或者，通信模块1602还用于向第二设备发送第一信息；或者，通信装置1600不使用资源辅助信息确定通信资源。
可选地，通信模块1602还用于在第二时间段内，至少一次接收第二设备发送的资源辅助信息。
可选地，通信模块1602还用于在第二时间段内，向第二设备发送第一信息；并接收第二设备根据第一信息发送的资源辅助信息。
如图16所示的通信装置还可以作为第二设备，执行本申请前述任一项实施例中，由第二设备执行的步骤。
例如，通信模块1602用于向第一设备发送第二信息；其中，第二信息指示第二设备为第一设备提供资源辅助信息。
可选地，第二信息用于指示第二设备为第一设备提供资源辅助信息；或者，第二信息用于指示第二设备是否为第一设备提供资源辅助信息。
可选地，通信模块1602还用于，接收来自第一设备的第一信息；其中，第一信息用于请求获取资源辅助信息。
可选地，第二信息由第一信道承载。
可选地，当第二信息指示第二设备为第一设备提供资源辅助信息，第二信息对应于第一信道的第一序列循环移位值；当第二信息指示第二设备不为第一设备提供资源辅助信息，第二信息对应于第一信道的第二序列循环移位值；或者，当第二信息指示第二设备为第一设备提供资源辅助信息时，第二信息对应于第一信道的第三序列循环移位值。
可选地，第一信道为物理侧行链路反馈信道PSFCH；第二信息承载在第一资源集合内；其中，第一资源集合是传输PSFCH的资源集合中包括的，用于承载混合自动重传请求HARQ信息的资源集合的补集。
可选地，第二设备在第二时隙发送第二信息，第二设备在第一时隙接收第一信息；其中，第二时隙是第一信息的最后一个符号所在时隙之后的包括PSFCH的第一个时隙，或者，第二时隙是第一时隙后间隔N个时间单元后的包括PSFCH的第一个时隙，N为正整数。
可选地，第二信息承载在传输第一信道的资源集合内；其中，用于传输第一信道的资源的集合和用于传输PSFCH资源的集合频分复用；或者，用于传输第一信道的资源的集合和用于传输PSFCH资源的集合独立配置。
可选地，第二信息对应于第一信道的多个比特位，多个比特位用于指示第二设备是否为第一设备提供资源辅助信息，以及指示第二设备是否成功接收到第一设备发送的数据。
可选地，第二信息承载在传输PSFCH资源的集合内；其中，传输PSFCH资源的集合还用于第二设备向第一设备发送HARQ信息。
可选地，第二设备在第二时隙发送第二信息，第二设备在第一时隙接收第一信息；
其中，第二时隙是第一时隙后间隔M个时间单元后的包括PSFCH的第一个时隙，M为正整数。
可选地，通信模块1602还用于，在第二时间段内，至少一次向第一设备发送资源辅助信息。
可选地，通信模块1602还用于，在第二时间段内，接收来自第一设备发送的第一信息；向根据第一信息向第二设备发送资源辅助信息。
需要说明的是，应理解以上装置的各个模块的划分仅仅是一种逻辑功能的划分，实际实现时可以全部或部分集成到一个物理实体上，也可以物理上分开。且这些模块可以全部以软件通过处理元件调用的形式实现；也可以全部以硬件的形式实现；还可以部分模块通过处理元件调用软件的形式实现，部分模块通过硬件的形式实现。例如，处理模块可以为单独设立的处理元件，也可以集成在上述装置的某一个芯片中实现，此外，也可以以程序代码的形式存储于上述装置的存储器中，由上述装置的某一个处理元件调用并执行以上确定模块的功能。其它模块的实现与之类似。此外这些模块全部或部分可以集成在一起，也可以独立实现。这里所述的处理元件可以是一种集成电路，具有信号的处理能力。在实现过程中，上述方法的各步骤或以上各个模块可以通过处理器元件中的硬件的集成逻辑电路或者软件形式的指令完成。
例如，以上这些模块可以是被配置成实施以上方法的一个或多个集成电路，例如：一个或多个特定集成电路(application specific integrated circuit，ASIC)，或，一个或多个微处理器(digital signal processor，DSP)，或，一个或者多个现场可编程门阵列(field programmable gate array，FPGA)等。再如，当以上某个模块通过处理元件调度程序代码的形式实现时，该处理元件可以是通用处理器，例如中央处理器(central processing unit，CPU)或其它可以调用程序代码的处理器。再如，这些模块可以集成在一起，以片上系统(system-on-a-chip，SOC)的形式实现。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质，(例如，软盘、硬盘、磁带)、光介质(例如，DVD)、或者半导体介质(例如固态硬盘solid state disk(SSD))等。
图17为本申请提供的通信装置一实施例的结构示意图，该通信装置可作为本申请前述实施例中任一所述的第一设备、或者第二设备。如图17所示，该通信装置1100可以包括：处理器111(例如CPU)、收发器113；其中，收发器113耦合至处理器111，处理器111控制收发器113的收发动作。可选的，所述通信装置1100还包括存储器112，存储器112中可以存储各种指令，以用于完成各种处理功能以及实现本申请实施例中第一设备或者第二设备执行的方法步骤。
可选的，本申请实施例涉及的通信装置还可以包括：电源114、系统总线115以及通信接口116。收发器113可以集成在通信装置1100的收发信机中，也可以为通信装置上独立的收发天线。系统总线115用于实现元件之间的通信连接。上述通信接口116用于实现通信装置与其他外设之间进行连接通信。
在本申请实施例中，上述处理器111用于与存储器112耦合，读取并执行存储器112中的指令，以实现上述方法实施例中网络设备、终端设备或核心网设备执行的方法步骤。收发器113与处理器111耦合，由处理器111控制收发器113进行消息收发，其实现原理和技术效果类似，在此不再赘述。
该图17中提到的系统总线可以是外设部件互连标准(peripheral component interconnect，PCI)总线或扩展工业标准结构(extended industry standard architecture，EISA)总线等。所述系统总线可以分为地址总线、数据总线、控制总线等。为便于表示，图中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。通信接口用于实现数据库访问装置与其他设备(例如客户端、读写库和只读库)之间的通信。存储器可能包含RAM，也可能还包括非易失性存储器(non-volatile memory)，例如至少一个磁盘存储器。
该图17中提到的处理器可以是通用处理器，包括中央处理器CPU、网络处理器(network processor，NP)等；还可以是数字信号处理器DSP、专用集成电路ASIC、现场可编程门阵列FPGA或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。
可选的，本申请实施例还提供一种可读存储介质，所述存储介质中存储有指令，当其在计算机上运行时，使得计算机执行如本申请前述各中，第一设备或者第二设备所执行的方法。
可选的，本申请实施例还提供一种运行指令的芯片，所述芯片用于执行本申请前述各中，第一设备或者第二设备所执行的方法。
本申请实施例还提供一种程序产品，所述程序产品包括计算机程序，所述计算机程序存储在存储介质中，至少一个处理器可以从所述存储介质读取所述计算机程序，所述至少一个处理器执行所述计算机程序时可实现本申请前述各中，第一设备或者第二设备所执行的方法。
在本申请实施例中，“至少一个”是指一个或者多个，“多个”是指两个或两个以上。“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B的情况，其中A，B可以是单数或者复数。字符“/”一般表示前后关联对象是一种“或”的关系；在公式中，字符“/”，表示前后关联对象是一种“相除”的关系。“以下至少一项(个)”或其类似表达，是指的这些项中的任意组合，包括单项(个)或复数项(个)的任意组合。例如，a，b，或c中的至少一项(个)，可以表示：a，b，c，a-b，a-c，b-c，或a-b-c，其中，a，b，c可以是单个，也可以是多个。
可以理解的是，在本申请实施例中涉及的各种数字编号仅为描述方便进行的区分，并不用来限制本申请实施例的范围。
可以理解的是，在本发明的实施例中，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
最后应说明的是：以上各实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述各实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的范围。

Claims (30)

  1. 一种通信方法，其特征在于，包括：
    第一设备接收来自第二设备的第二信息；其中，所述第二信息指示所述第二设备为所述第一设备提供资源辅助信息。
  2. 根据权利要求1所述的方法，其特征在于，
    所述第二信息用于指示所述第二设备为所述第一设备提供资源辅助信息；或者，
    所述第二信息用于指示所述第二设备是否为所述第一设备提供资源辅助信息。
  3. 根据权利要求1或2所述的方法，其特征在于，所述第一设备接收来自第二设备的第二信息之前，还包括：
    所述第一设备向所述第二设备发送第一信息；其中，所述第一信息用于请求获取资源辅助信息。
  4. 根据权利要求1-3任一项所述的方法，其特征在于，所述第二信息由第一信道承载。
  5. 根据权利要求4所述的方法，其特征在于，
    当所述第二信息指示所述第二设备为所述第一设备提供所述资源辅助信息，所述第二信息对应于所述第一信道的第一序列循环移位值；当所述第二信息指示所述第二设备不为所述第一设备提供所述资源辅助信息，所述第二信息对应于所述第一信道的第二序列循环移位值；
    或者，
    当所述第二信息指示所述第二设备为所述第一设备提供所述资源辅助信息时，所述第二信息对应于所述第一信道的第三序列循环移位值。
  6. 根据权利要求4或5所述的方法，其特征在于，
    所述第一信道为物理侧行链路反馈信道PSFCH；
    所述第二信息承载在第一资源集合内；其中，所述第一资源集合是传输PSFCH的资源集合中包括的，用于承载混合自动重传请求HARQ信息的资源集合的补集。
  7. 根据权利要求6所述的方法，其特征在于，
    所述第一设备在第一时隙发送所述第一信息，所述第一设备在第二时隙接收所述第二信息；
    其中，所述第二时隙是所述第一信息的最后一个符号所在时隙之后的包括所述PSFCH的第一个时隙，或者，所述第二时隙是所述第一时隙后间隔N个时间单元后的包括所述PSFCH的第一个时隙，N为正整数。
  8. 根据权利要求4或5所述的方法，其特征在于，
    所述第二信息承载在传输第一信道的资源集合内；
    其中，用于传输第一信道的资源的集合和用于传输PSFCH资源的集合频分复用；
    或者，用于传输所述第一信道的资源的集合和用于传输PSFCH资源的集合独立配置。
  9. 根据权利要求4所述的方法，其特征在于，
    所述第二信息对应于所述第一信道的多个比特位，所述多个比特位用于指示所述第二设备是否为所述第一设备提供所述资源辅助信息，以及指示所述第二设备是否成 功接收到所述第一设备发送的数据。
  10. 根据权利要求9所述的方法，其特征在于，
    所述第二信息承载在传输PSFCH资源的集合内；
    其中，所述传输PSFCH资源的集合还用于所述第二设备向所述第一设备发送HARQ信息。
  11. 根据权利要求10所述的方法，其特征在于，
    所述第一设备在第一时隙发送所述第一信息，所述第一设备在第二时隙接收所述第二信息；
    其中，所述第二时隙是所述第一时隙后间隔M个时间单元后的包括所述PSFCH的第一个时隙，M为正整数。
  12. 根据权利要求1-11任一项所述的方法，其特征在于，
    所述第一设备接收所述第二设备发送的第二信息，所述第二信息指示所述第二设备不为所述第一设备提供所述资源辅助信息；或者，在所述第一设备发送所述第一信息，第一时间段内未接收到所述第二信息之后，所述方法还包括：
    所述第一设备向第四设备发送所述第一信息；或者，所述第一设备向所述第二设备发送所述第一信息；或者，所述第一设备不使用所述资源辅助信息确定通信资源。
  13. 根据权利要求1-11任一项所述的方法，其特征在于，
    所述第一设备接收所述第二设备发送的第二信息，所述第二信息指示所述第二设备为所述第一设备提供资源辅助信息，所述方法还包括：
    所述第一设备在第二时间段内，至少一次接收所述第二设备发送的资源辅助信息。
  14. 根据权利要求13所述的方法，其特征在于，所述第一设备在第二时间段内，接收所述第二设备发送的资源辅助信息，包括：
    在第二时间段内，所述第一设备向所述第二设备发送所述第一信息；
    所述第一设备接收所述第二设备根据所述第一信息发送的资源辅助信息。
  15. 一种通信方法，其特征在于，包括：
    第二设备向第一设备发送第二信息；其中，所述第二信息指示所述第二设备为所述第一设备提供资源辅助信息。
  16. 根据权利要求15所述的方法，其特征在于，
    所述第二信息用于指示所述第二设备为所述第一设备提供资源辅助信息；或者，
    所述第二信息用于指示所述第二设备是否为所述第一设备提供资源辅助信息。
  17. 根据权利要求15或16所述的方法，其特征在于，所述第二设备向第一设备发送第二信息之前，还包括：
    所述第二设备接收来自所述第一设备的第一信息；其中，所述第一信息用于请求获取资源辅助信息。
  18. 根据权利要求15-17任一项所述的方法，其特征在于，所述第二信息由第一信道承载。
  19. 根据权利要求18所述的方法，其特征在于，
    当所述第二信息指示所述第二设备为所述第一设备提供所述资源辅助信息，所述第二信息对应于所述第一信道的第一序列循环移位值；当所述第二信息指示所述第二 设备不为所述第一设备提供所述资源辅助信息，所述第二信息对应于所述第一信道的第二序列循环移位值；
    或者，
    当所述第二信息指示所述第二设备为所述第一设备提供所述资源辅助信息时，所述第二信息对应于所述第一信道的第三序列循环移位值。
  20. 根据权利要求18或19所述的方法，其特征在于，
    所述第一信道为物理侧行链路反馈信道PSFCH；
    所述第二信息承载在第一资源集合内；其中，所述第一资源集合是传输PSFCH的资源集合中包括的，用于承载混合自动重传请求HARQ信息的资源集合的补集。
  21. 根据权利要求20所述的方法，其特征在于，
    所述第二设备在第二时隙发送所述第二信息，所述第二设备在第一时隙接收所述第一信息；
    其中，所述第二时隙是所述第一信息的最后一个符号所在时隙之后的包括所述PSFCH的第一个时隙，或者，所述第二时隙是所述第一时隙后间隔N个时间单元后的包括所述PSFCH的第一个时隙，N为正整数。
  22. 根据权利要求18或19所述的方法，其特征在于，
    所述第二信息承载在传输第一信道的资源集合内；
    其中，用于传输第一信道的资源的集合和用于传输PSFCH资源的集合频分复用；
    或者，用于传输所述第一信道的资源的集合和用于传输PSFCH资源的集合独立配置。
  23. 根据权利要求18所述的方法，其特征在于，
    所述第二信息对应于所述第一信道的多个比特位，所述多个比特位用于指示所述第二设备是否为所述第一设备提供所述资源辅助信息，以及指示所述第二设备是否成功接收到所述第一设备发送的数据。
  24. 根据权利要求23所述的方法，其特征在于，
    所述第二信息承载在传输PSFCH资源的集合内；
    其中，所述传输PSFCH资源的集合还用于所述第二设备向所述第一设备发送HARQ信息。
  25. 根据权利要求24所述的方法，其特征在于，
    所述第二设备在第二时隙发送所述第二信息，所述第二设备在第一时隙接收所述第一信息；
    其中，所述第二时隙是所述第一时隙后间隔M个时间单元后的包括所述PSFCH的第一个时隙，M为正整数。
  26. 根据权利要求15-25任一项所述的方法，其特征在于，所述第二信息指示所述第二设备为所述第一设备提供资源辅助信息，所述方法还包括：
    所述第二设备在第二时间段内，至少一次向所述第一设备发送资源辅助信息。
  27. 根据权利要求26所述的方法，其特征在于，所述第二设备在第二时间段内，向所述第一设备发送资源辅助信息，包括：
    在所述第二时间段内，所述第二设备接收来自所述第一设备发送的第一信息；
    所述第二设备向根据所述第一信息向所述第二设备发送资源辅助信息。
  28. 一种通信装置，其特征在于，包括：通信模块和处理模块；
    所述通信模块用于实现所述通信装置与其他装置进行通信；
    所述处理模块用于实现如权利要求1-14任一项、或者如权利要求15-27任一项所述的方法。
  29. 一种通信装置，其特征在于，包括：处理器和通信接口；
    所述通信接口用于实现所述通信装置与其他装置进行通信；
    所述处理器用于实现如权利要求1-14任一项、或者如权利要求15-27任一项所述的方法。
  30. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质存储有计算机程序，当所述计算机程序被运行时，可实现如权利要求1-14任一项、或者如权利要求15-27任一项所述的方法。
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