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CN-122028211-A - Communication method and device

CN122028211ACN 122028211 ACN122028211 ACN 122028211ACN-122028211-A

Abstract

The application provides a communication method and a communication device, belongs to the technical field of communication, and aims to solve the problem of medium synchronization loss. The method comprises the steps of a first communication device and a second communication device, wherein the first communication device and the second communication device can be informed of the fact that the first communication device needs to assist the first communication device in restoring the medium synchronization after entering a medium synchronization restoring flow in a capability negotiation stage or an updating stage of the first communication device and the second communication device, and the second communication device can assist the second communication device in restoring the medium synchronization after entering the medium synchronization restoring flow by indicating information or implicitly indicating whether the unavailable time length is larger than a time length threshold value.

Inventors

  • ZHANG MAOLIN
  • LI YUNBO
  • SHI ZHENPENG

Assignees

  • 华为技术有限公司

Dates

Publication Date
20260512
Application Date
20241111

Claims (20)

  1. 1. A communication method applied to a first communication device, the method comprising: Receiving information from a second communication device in a capability negotiation stage or an updating stage of the first communication device and the second communication device, wherein the information of the second communication device indicates whether the second communication device needs to assist the second communication device to restore the medium synchronization after entering a medium synchronization restoration process; And saving information of the second communication device.
  2. 2. The communication method according to claim 1, wherein the information of the second communication apparatus includes indication information indicating whether or not the second communication apparatus needs to be assisted in restoring the medium synchronization after the second communication apparatus enters the medium synchronization restoration process.
  3. 3. The communication method according to claim 2, characterized in that the method further comprises: And according to the indication information, determining to assist the second communication device to restore the medium synchronization after the second communication device enters the medium synchronization restoration flow.
  4. 4. The communication method according to claim 1 or 2, wherein the information of the second communication device includes an unavailable time period of the second communication device, and if the unavailable time period of the second communication device is greater than a time period threshold, it is determined that the second communication device needs to be assisted in recovering the medium synchronization after entering the medium synchronization recovery procedure.
  5. 5. The communication method according to claim 4, wherein the time period of unavailability of the second communication apparatus includes a time period of a channel switching delay of the second communication apparatus or an interference state of the second communication apparatus; the channel switch delay being greater than the duration threshold indicates that the duration of time that the second communication device lost media synchronization when switching channels exceeds a media synchronization threshold (aMediumSyncThreshold); Or the duration of the interference state of the second communication device is greater than the duration threshold, which indicates that the duration of the interference state of the second communication device exceeds the media synchronization threshold.
  6. 6. The communication method according to claim 4 or 5, wherein the information of the second communication device further includes information indicating an amount of data buffered by the second communication device, and the method further includes: And determining that the second communication device needs to be assisted to restore the medium synchronization after entering the medium synchronization restoration process according to the fact that the unavailable time length of the second communication device is greater than a time length threshold value and the data volume cached by the second communication device is greater than a data volume threshold value.
  7. 7. A communication method according to any one of claims 1 to 6, characterized in that, The capability negotiation stage or update stage comprises any one of a capability negotiation stage or update stage of a non-primary channel access (NPCA) mode, a capability negotiation stage or update stage of a dynamic sub-band operation (DSO) mode, a capability negotiation stage or update stage of a Dynamic Power Saving (DPS) mode, a capability negotiation stage or update stage of IDC or DUI or DUO interference mode.
  8. 8. A method of communication according to any one of claims 1-7, characterized in that the method further comprises: Transmitting capability information indicating that the first communication device supports assisting in restoring media synchronization; the receiving information from the second communication device includes: and receiving information of the second communication device sent by the second communication device according to the capability information.
  9. 9. A method of communication according to any one of claims 1-8, characterized in that the method further comprises: determining that the second communication device loses medium synchronization on a first channel when switching to the first channel, and entering a medium synchronization recovery flow; Assisting the second communication device to resume media synchronization of the second communication device on the first channel.
  10. 10. The communication method of claim 9, wherein the first channel is a primary channel or a primary channel in NPCA mode, or wherein the first channel is a DSO subchannel or a DSO primary channel, or wherein the first channel is a channel of a first bandwidth or a channel of a second bandwidth, the first bandwidth being different from the second bandwidth.
  11. 11. A communication method according to any of claims 1-10, characterized in that the information of the second communication means is carried in NPCA elements or DSO elements or DPS elements or IDC elements of downstream frames or upstream frames.
  12. 12. The communication method according to any one of claims 1-11, wherein the first communication device is any one of an access point AP, a target non-AP STA, a part of non-AP STA, or all non-AP STA.
  13. 13. The method according to any one of claims 1 to 12, wherein the second communication device is any one of an AP, a target non-AP STA, a part of non-AP STA, or all non-AP STA.
  14. 14. The communication method according to claim 1, wherein the first communication apparatus starts a medium synchronization recovery procedure when the first communication apparatus belongs to any one of an AP or non-AP STA completing channel switching in NPCA mode, an AP or non-AP STA completing subchannel switching in IDC mode, an AP or non-AP STA completing capability mode switching in DPS mode, a non-AP STA completing subchannel switching in DSO mode, an AP or non-AP STA ending interference state in IDC or DUI or DUO interference mode.
  15. 15. The communication method of claim 14, wherein the first communication device initiates media synchronization recovery comprising: and if the duration of the first communication device losing the medium synchronization is greater than the duration threshold, the first communication device starts the medium synchronization recovery flow immediately after the (sub) channel switching is finished or the capability mode switching is finished or the interference state is finished.
  16. 16. The communication method according to claim 1, characterized in that the method further comprises: Transmitting policy information to the second communication device, the policy information instructing the second communication device to circumvent at least one of switching from NPCA primary channel to primary channel in advance, switching from DSO sub-channel to DSO primary channel in advance, or switching from channel of first bandwidth to channel of second bandwidth in advance, closing/suspending target mode; And/or the policy information indicates at least one of assisting in recovering the media synchronization, employing media synchronization recovery parameters in a target mode including any of NPCA mode, DSO mode, DPS mode, IDC or DUI or DUO mode.
  17. 17. A communication method applied to a second communication device, the method comprising: acquiring information of the second communication device, wherein the information of the second communication device indicates whether the second communication device needs to be assisted to restore the medium synchronization after the second communication device enters a medium synchronization restoration process; The information of the second communication device is sent in a capability negotiation phase or an update phase of the first communication device and the second communication device.
  18. 18. The communication method according to claim 17, characterized in that the method further comprises: Receiving capability information indicating that the first communication device supports assisting in restoring media synchronization; The transmitting the information of the second communication device includes: and sending information of a second communication device to the first communication device according to the capability information.
  19. 19. A communication method applied to a first communication device, the method comprising: the method comprises the steps of obtaining a medium synchronization recovery parameter, wherein the medium synchronization recovery parameter is used for recovering medium synchronization after a second communication device finishes an interference state or is switched to a second channel from a first channel to enter a medium synchronization recovery flow; Or acquiring a medium synchronization recovery parameter, wherein the medium synchronization recovery parameter is used for recovering the medium synchronization after the first communication device finishes the interference state or switches from the first channel to the second channel and enters the medium synchronization recovery flow.
  20. 20. The communication method according to claim 19, wherein the first channel is a main channel, the second channel is a non-main channel, or the first channel is a non-main channel, and the second channel is a main channel; or the first channel is a main channel, the second channel is a sub-channel, or the first channel is a sub-channel, and the second channel is a main channel.

Description

Communication method and device Technical Field The present application relates to the field of communications technologies, and in particular, to a communications method and apparatus. Background Today, the large bandwidth channels used by devices that use the 802.11 protocol in the IEEE related standard for wireless communication are logically divided into sub-channels in units of 20MHz, e.g. 80MHz channels have 4 20MHz sub-channels, 160MHz channels have 8 20MHz sub-channels, etc. Among these sub-channels, the device knows that a certain sub-channel is a main channel and the rest sub-channels are non-main channels according to the configuration information of Basic Service Set (BSS) SERVICE SET. The mechanism based on the main channel access is neat in logic and simple in operation, but as devices are deployed more and more densely and the bandwidth of the devices is larger, the frequency spectrum use frequency caused by the main channel access is also reduced. For example, if a 160MHz station only detects that the primary 20MHz channel is busy and the remaining subchannels are idle, then according to the primary channel access mechanism, the device cannot use any channel but can only back off, but in reality the remaining subchannels are idle and theoretically available. Therefore, it is proposed that when the main channel is busy, transmission is performed through an idle non-main channel (Anchor channel) without backoff, at which time the device switches to the Anchor channel and performs preamble detection (preamble detection, PD) on the Anchor channel, an operation called non-main channel access (NPCA). Wherein the idle non-primary channel may also be referred to as NPCA primary channel (NPCA PRIMARY CHANNEL). The medium synchronization may be lost when switching between the primary channel and the NPCA primary channel, and thus, it is very important how to solve the problem of medium synchronization loss. Disclosure of Invention The application provides a communication method and a communication device, which are used for recovering media synchronization when the media synchronization is lost. In order to achieve the above purpose, the application adopts the following technical scheme: In a first aspect, a communication method is provided, which may be performed by a first communication device, or a component of the first communication device, for example, a processor, a chip, or a system-on-chip of the first communication device, or a logic module or software capable of implementing all or part of the first communication device. The method comprises the steps of receiving information from a second communication device in a capability negotiation stage or an updating stage of the first communication device and the second communication device, indicating whether the second communication device needs to assist the second communication device to restore medium synchronization after entering a medium synchronization restoration process, and storing the information of the second communication device. Therefore, the second communication device can inform the first communication device that the first communication device needs to assist the first communication device in restoring the medium synchronization after the first communication device and the second communication device enter the medium synchronization restoration process in a capability negotiation stage or an updating stage of the first communication device and the second communication device, and can indicate through indication information or can implicitly indicate through whether the unavailable time length is larger than a time length threshold value, thereby assisting the second communication device in restoring the medium synchronization after the second communication device enters the medium synchronization restoration process. In one possible design, the information of the second communication device includes indication information, where the indication information indicates whether the second communication device needs to assist in recovering the medium synchronization after the second communication device enters the medium synchronization recovery procedure. Optionally, according to the indication information, it is determined to assist the second communication device to resume the medium synchronization after the second communication device enters the medium synchronization resume procedure. In one possible design, the information of the second communication device includes an unavailable time period of the second communication device, and if the unavailable time period of the second communication device is greater than a time period threshold, it is determined that the second communication device needs to assist in recovering the medium synchronization after entering the medium synchronization recovery procedure. Optionally, the unavailable period of the second communication device includes a channel switching delay of the second comm