WO2023222072A1 - Procédé d'accès à un canal et dispositif associé - Google Patents

Procédé d'accès à un canal et dispositif associé Download PDF

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Publication number
WO2023222072A1
WO2023222072A1 PCT/CN2023/094980 CN2023094980W WO2023222072A1 WO 2023222072 A1 WO2023222072 A1 WO 2023222072A1 CN 2023094980 W CN2023094980 W CN 2023094980W WO 2023222072 A1 WO2023222072 A1 WO 2023222072A1
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WIPO (PCT)
Prior art keywords
service identifier
field
station
service
data
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PCT/CN2023/094980
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English (en)
Chinese (zh)
Inventor
杨懋
李波
李云波
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华为技术有限公司
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Publication of WO2023222072A1 publication Critical patent/WO2023222072A1/fr

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Classifications

    • 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
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present application relates to the field of communications, and in particular to channel access methods and related devices.
  • Wireless local area network has experienced standards such as IEEE 802.11a/b/g/n/ac/ax.
  • the standard version of 802.11be currently under discussion, continues to evolve and develop.
  • the name of the 802.11n standard is also called high throughput (HT).
  • the 802.11ac standard is also called very high throughput (VHT).
  • 802.11ax is also called high efficient (HE).
  • 802.11be is also called extremely high throughput (EHT).
  • EHT extremely high throughput
  • IEEE 802.11be plans to introduce restricted target wakeup time (r-TWT) technology to improve delay guarantee performance. Therefore, it is necessary to study solutions to improve delay guarantee performance through r-TWT technology.
  • r-TWT restricted target wakeup time
  • the embodiment of the present application discloses a channel access method and related devices, which can ensure that data of r-TWT traffic identifier (TID) is transmitted with priority.
  • TID r-TWT traffic identifier
  • embodiments of the present application provide a channel access method.
  • the method includes: a station receives a first frame, and a first field in the first frame is used to indicate one or more limited target wake-ups of the station. Time service phase; if the first frame also includes a second field, the second field is used to indicate one or more silent intervals of the site, the starting time of any silent interval and any defined target wake-up time The starting time of the service phase is the same, and the station performs the first operation in any of the silent intervals.
  • the first operation includes any of the following: not sending data with the first service identifier; When the access type competes for a channel, the station sends the data of the second service ID before sending the data of the first service ID; or, if the first frame does not include the second field, the station sends the data of the second service ID before the access type competes for the channel. After the channel, data is sent.
  • the service identifier of the data is the first service identifier or the second service identifier.
  • the second field is used to indicate one or more silent intervals of the site.
  • the starting time is the same as the starting time of any limited target wake-up time service phase; the second service identifier belongs to the service identifier of the priority service agreed between the station and the access point, and the first service identifier does not belong to The service identifier of the priority service agreed between the site and the access point.
  • whether the second field is included in the first frame is stipulated in the protocol or pre-agreed, so that the station can clearly understand the operations that need to be performed.
  • the station performs the operations specified in the protocol or pre-agreed based on whether the first frame includes the second field. Specifically, if the first frame also includes the second field, the station performs the first operation in any of the above silent intervals; it can To avoid adverse effects on the transmission of data with the second service identifier, that is, to ensure the delay performance of the site in transmitting data with the second service identifier. If the first frame does not include the second field, the station sends data after competing for the channel; this allows the station to transmit data in time.
  • the access type corresponding to the first service identifier is different from the access type corresponding to the second service identifier.
  • the access type corresponding to the first service identifier is different from the access type corresponding to the second service identifier, which can avoid causing the data of the second service identifier to be unable to be transmitted.
  • the second field includes an element identification field, a length field, a silence count field, a silence period field, a silence length field, and a silence offset field.
  • one or more silent intervals may be determined by information included in the second field.
  • the second frame further includes a third field
  • the third field is used to indicate the channel access rule of the data of the first service identifier of the station
  • the station is The first operation performed in any silent interval complies with the channel access rule.
  • the first operation performed by the station in any silent interval is determined by the station based on the third field.
  • the third field indicates the operation performed by the station during any silent interval.
  • the third field indicates the channel access rules for the data of the first service identification of the site, which can flexibly configure the channel access rules for the data of the first service identification of the site and reduce the need for the second service identification. Adverse effects caused by the transmission of data.
  • embodiments of the present application provide another channel access method.
  • the method includes: a station receives a first frame, and a first field in the first frame is used to indicate one or more defined targets of the station. Wake-up time service phase; if the station does not need to transmit data of the second service identifier at the starting time of any defined target wake-up time service phase, if the first frame also includes a second field, the The second field is used to indicate one or more silent intervals of the site.
  • the starting time of any silent interval is the same as the starting time of any defined target wake-up time service phase.
  • the site is in any of the Perform a second operation during the silent interval.
  • the second operation includes any of the following: not sending data of the first service identifier; changing the channel competition parameter of the access type corresponding to the first service identifier of the station to a channel access opportunity.
  • a lower group or, if the first frame does not include the second field, the station sends data after competing for the channel, and the service identifier of the data is the first service identifier or the second service identifier.
  • Service identifier, the second field is used to indicate one or more silent intervals of the site, the starting time of any silent interval is the same as the starting time of any defined target wake-up time service phase; the second service
  • the first service identifier is a service identifier that does not belong to the priority service agreed between the site and the access point.
  • whether the second field is included in the first frame is stipulated in the protocol or pre-agreed, so that the station can clearly understand the operations that need to be performed.
  • the station performs the operations specified in the protocol or pre-agreed based on whether the first frame includes the second field. Specifically, if the first frame also includes the second field, the station performs the second operation in any of the above silent intervals.
  • the second operation is not to send the data with the first service identifier, adverse effects on the transmission of the data with the second service identifier can be avoided.
  • the probability of channel access of the access type corresponding to the first service identifier can be reduced. , can reduce the probability of adverse impact on the transmission of data with the second service identifier, and retain the opportunity to transmit data with the first service identifier to a certain extent. If the first frame does not include the second field, the station sends data after competing for the channel; this allows the station to transmit data in time.
  • the access type corresponding to the first service identifier is different from the access type corresponding to the second service identifier.
  • the access type corresponding to the first service identifier is different from the access type corresponding to the second service identifier, which can avoid causing the data of the second service identifier to be unable to be transmitted.
  • the method when the second operation is not to send the data of the first service identification, the method further includes: the station obtains data to be sent within the time indicated by any of the silent intervals. The data of the second service identifier, the station immediately competes for the channel; or, the station obtains the data of the second service identifier to be sent within the time indicated by any of the silent intervals, and the station After any of the silent intervals ends, contention for the channel occurs.
  • the station after the station obtains the data of the second service identifier to be sent within the time indicated by any of the above silent intervals, it immediately competes for the channel; in order to transmit the data of the second service identifier faster.
  • the station competes for the channel after any of the above silent intervals ends; this can prevent the service with the first service identification from occupying the transmission opportunity of the service with the second service identification within the limited target wake-up time service phase, ensuring that the second service identification business priority.
  • the second field includes an element identification field, a length field, a silence count field, a silence period field, a silence length field, and a silence offset field.
  • one or more silent intervals may be determined by information included in the second field.
  • the second frame further includes a third field, the third field is used to indicate that the station does not have any second service identifier at the starting time of the defined target wake-up time service phase.
  • the channel access rule when the data needs to be transmitted, and the second operation performed by the station in any silent interval complies with the channel access rule.
  • the second operation performed by the station in any silent interval is determined by the station based on the third field.
  • the third field indicates that the station will Interval operations.
  • the third field indicates the channel access rules for the data of the first service identification of the site.
  • the channel access rules for the data of the first service identification of the site can be flexibly configured to reduce the need for the second service identification. Adverse effects caused by the transmission of data.
  • the present application provides another channel access method, which method includes: sending a first frame, the first field in the first frame being used to indicate one or more defined target wake-up time service phases of the station; If the first frame further includes a second field, the second field is used to indicate one or more silent intervals of the station, the starting time of any silent interval and the start of any defined target wake-up time service phase.
  • the first frame is used to instruct the station to perform the first operation in any silent interval.
  • the first operation includes any of the following: not sending data with the first service identifier; When the access type corresponding to the service identifier competes for the channel, before sending the data of the first service identifier, the data of the second service identifier is sent; or, if the first frame does not include the second field, the The second field is used to indicate one or more silent intervals of the site.
  • the starting time of any silent interval is the same as the starting time of any defined target wake-up time service phase.
  • the first frame is used to indicate the After competing for the channel, the station sends data, and the service identifier of the data is the first service identifier or the second service identifier; the second service identifier belongs to the priority service agreed between the station and the access point. Service identifier, the first service identifier does not belong to the service identifier of the priority service agreed between the station and the access point.
  • whether the second field is included in the first frame is stipulated in the protocol or pre-agreed, so that the station can clearly understand the operations that need to be performed. Or, in other words, whether the first frame includes a second field that instructs the station to perform a different operation. Specifically, if the first frame also includes a second field, the first frame is used to instruct the station to perform the first operation in any of the above silent intervals; adverse effects on the transmission of r-TWT TID data can be avoided. If the first frame does not include the second field, the first frame is used to instruct the station to send data after competing for the channel; this allows the station to transmit data in a timely manner.
  • the access type corresponding to the first service identifier is different from the access type corresponding to the second service identifier.
  • the access type corresponding to the first service identifier is different from the access type corresponding to the second service identifier, which can avoid causing the data of the second service identifier to be unable to be transmitted.
  • the second frame further includes a third field, the third field is used to indicate the channel access rule for the data of the first service identifier of the station, and the first Operation complies with the channel access rules described.
  • the first frame is used to instruct the station to perform the first operation in compliance with the channel access rule indicated by the third field in any silent interval.
  • the third field indicates the channel access rules for the data of the first service identification of the site, which can flexibly configure the channel access rules for the data of the first service identification of the site and reduce the need for the second service identification. Adverse effects caused by the transmission of data.
  • the competition can continue after the silent interval ends, so
  • the first operation is: do not send the data of the first service identifier in any of the silent intervals; or, if the third field indicates that the data of the first service identifier is prohibited from competing for the channel in the silent interval, However, after all the data of the second service identifier is transmitted, the data of the first service identifier is allowed to compete for the channel.
  • the first operation is: when the access type corresponding to the first service identifier competes for the channel. Next, before sending the data of the first service identifier, the data of the second service identifier is sent.
  • the third field indicates the channel access rule for the data of the first service identifier within the silent interval, and the first operation performed by the station in any of the above silent intervals conforms to the channel access rule.
  • Adverse effects on the transmission of r-TWT TID data can be reduced by flexibly indicating the channel access rules for the station's first service identification data within the silent interval.
  • the present application provides another channel access method, which method includes: sending a first frame, the first field in the first frame being used to indicate one or more defined target wake-up time service phases of the station; If the first frame further includes a second field, the second field is used to indicate one or more silent intervals of the station, the starting time of any silent interval and any defined target wake-up time service phase The starting time is the same, and the first frame is used by the station to indicate that the station does not need to transmit the data of the second service identifier at the starting time of any defined target wake-up time service phase.
  • the second operation includes any of the following: not sending data of the first service identifier; changing the channel competition parameter of the access type corresponding to the first service identifier of the station to a channel A group with a lower access chance; or, if the first frame does not include a second field, the second field is used to indicate one or more silent intervals of the site, and the starting time of any silent interval The same as the starting time of any defined target wake-up time service phase, the first frame is used to instruct the station to send data after competing for the channel, and the service identifier of the data is the first service identifier or the so-called first service identifier.
  • the second service identifier; the second service identifier belongs to the service identifier of the priority service agreed between the site and the access point, and the first service identifier does not belong to the priority service agreed between the site and the access point.
  • Business identification is used to the service identifier of the priority service agreed between the site and the access point.
  • whether the second field is included in the first frame is stipulated in the protocol or pre-agreed, so that the station can clearly understand the operations that need to be performed. Or, in other words, whether the first frame includes a second field that instructs the station to perform a different operation. Specifically, if the first frame also includes a second field, the first frame is used to indicate to the station that there is no data with the second service identifier that needs to be transmitted at the start time of any of the defined target wake-up time service phases. Perform the second operation during the silent interval. When the second operation is not to send the data of the first service identifier, adverse effects on the transmission of the r-TWT TID data can be avoided.
  • the second operation is to change the channel competition parameters of the AC corresponding to the first service identification of the site to a group with a lower channel access chance, it can reduce the adverse impact on the transmission of data with the second service identification and at the same time provide Provides an opportunity to transmit data of the first service identification. If the first frame does not include the second field, the first frame is used to indicate that after the station competes for the channel, Send data; enables the site to transmit data in a timely manner.
  • the access type corresponding to the first service identifier is different from the access type corresponding to the second service identifier.
  • the access type corresponding to the first service identifier is different from the access type corresponding to the second service identifier, which can avoid causing the data of the second service identifier to be unable to be transmitted.
  • the second frame further includes a third field, the third field is used to indicate that the station does not have any second service identifier at the starting time of the defined target wake-up time service phase.
  • the data needs to be transmitted according to the channel access rules, and the second operation complies with the channel access rules.
  • the first frame is used by the station to indicate that the station does not need to transmit data of the second service identifier at the starting time of any defined target wake-up time service phase.
  • the second operation in compliance with the channel access rule is performed during the silent interval.
  • the third field indicates the channel access rules for the data of the first service identification of the site, which can flexibly configure the channel access rules for the data of the first service identification of the site and reduce the need for the second service identification. Adverse effects caused by the transmission of data.
  • the not sending the data of the first service identifier includes: not competing for the channel in any of the silent intervals, and not competing for the channel in any of the silent intervals. After the end, continue to compete for the channel; do not compete for the channel in any of the silent intervals, and start competing for the channel after the data of the second service identifier arrives; if the third field indicates that the station is within the limited target wake-up time When there is no data with the second service identifier that needs to be transmitted at the start time of the service phase, the station is prohibited from competing for the channel in the silent interval, and can continue to compete after the silent interval ends.
  • the second operation is: There is no competition for the channel during any of the silent intervals, and the channel continues to compete for the channel after the end of any of the silent intervals; or, if the third field indicates that the station does not compete for the channel at the start time of the limited target wake-up time service phase, When any data of the second service identification needs to be transmitted, the station is prohibited from competing for the channel in the silent interval. However, after the data of the second service identification arrives, competition for the channel begins.
  • the second operation is: after obtaining the data to be After the data of the second service identifier is sent, competition for the channel begins. Before obtaining the data of the second service identifier to be sent, the station is prohibited from competing for the channel in the silent interval.
  • the third field indicates the channel access rule for the data of the first service identifier within the silent interval.
  • the second operation performed by the station in any of the above silent intervals conforms to the channel access rule, and the station can be flexibly instructed.
  • Channel access rules for the data of the first service identifier within the silent interval in order to reduce the adverse impact on the transmission of r-TWT TID data.
  • the present application provides another channel access method, which method includes: a station receiving a second frame, a first field in the second frame being used to indicate one or more defined target wake-up times of the station In the service phase, the third field in the second frame indicates the channel access rule for the data of the first service identifier of the station; if the second frame also includes a second field, the second field is used to indicate the One or more silent intervals of the site, the starting time of any silent interval is the same as the starting time of any defined target wake-up time service phase of the site, and the site performs the third operation in any silent interval , the third operation complies with the channel access rule; the third operation includes any of the following: after competing for the channel, sending data, the service identifier of the data belongs to the second service identifier or the third service identifier A service identifier; do not send the data of the first service identifier; when the access type corresponding to the first service identifier competes for the channel, before sending the data of the first service
  • the second field is used to indicate one or more silent intervals of the site, the starting time of any silent interval is the same as the starting time of any defined target wake-up time service phase; the second service identifier belongs to The service identifier of the priority service agreed between the site and the access point.
  • the first service identifier does not belong to the priority service between the site and the access point.
  • the third field in the second frame indicates the channel access rule for the data of the site's first service identifier (i.e., non-rTWT TID), and the channel for the data of the site's first service identifier can be flexibly configured. access rules, and reduce the adverse impact on the transmission of data with the second service identifier.
  • the access type corresponding to the first service identifier is different from the access type corresponding to the second service identifier.
  • the access type corresponding to the first service identifier is different from the access type corresponding to the second service identifier, which can avoid causing the data of the second service identifier to be unable to be transmitted.
  • the present application provides another channel access method, which method includes: a station receiving a second frame, a first field in the second frame being used to indicate one or more defined target wake-up times of the station In the service phase, the third field in the second frame indicates the channel access rule of the station when no data with the second service identifier needs to be transmitted at the start time of the defined target wake-up time service phase; the station is in any Define the starting time of the target wake-up time service phase.
  • the station When no data of the second service identifier needs to be transmitted, if the second frame also includes a second field, the second field is used to indicate a or multiple silent intervals, the starting time of any silent interval is the same as the starting time of any defined target wake-up time service phase, the station performs a fourth operation in any silent interval, and the fourth The operation complies with the channel access rules; the fourth operation includes any of the following: after competing for the channel, send data, the service identifier of the data belongs to the first service identifier; do not send data (or do not perform Channel competition); after obtaining the data of the second service identifier to be sent, start competing for the channel; or, if the second frame does not include the second field, the station sends data after competing for the channel, so The service identifier of the data is the first service identifier or the second service identifier.
  • the second field is used to indicate one or more silent intervals of the site.
  • the starting time of any silent interval is the same as any
  • the start time of the limited target wake-up time service phase is the same; the second service identifier belongs to the service identifier of the priority service agreed between the site and the access point, and the first service identifier does not belong to the site and the access point
  • the service identifier of the priority service of the point agreement is used to indicate one or more silent intervals of the site.
  • the third field in the second frame indicates the channel access rule when the station does not need to transmit any data with the second service identifier at the start time of the limited target wake-up time service phase, and the station can be flexibly configured. Define the channel access rule when the start time of the target wake-up time service phase does not require transmission of any data with the second service identifier, and reduce the adverse impact on the transmission of data with the second service identifier. If the second frame does not include the second field, the second frame is used to instruct the station to send data after competing for the channel; this allows the station to transmit data in a timely manner.
  • the present application provides another channel access method, which method includes: the access point sends a second frame, the first field in the second frame is used to indicate one or more defined target wake-up times of the station In the service phase, the third field in the second frame indicates the channel access rule for the data of the first service identifier of the station; if the second frame also includes a second field, the second field is used to indicate the One or more silent intervals of the station, the starting time of any silent interval is the same as the starting time of any defined target wake-up time service phase of the station, and the second frame is used to indicate that the station is in the
  • the third operation is performed during the silent interval, and the third operation complies with the channel access rules; the third operation includes any one of the above and the following: after competing for the channel, sending data, and the service identifier of the data belongs to the second Service identifier or the first service identifier; do not send the data of the first service identifier; when the access type corresponding to the first service identifier competes for the
  • the second frame is used to instruct the station to send data after competing for the channel.
  • the service identifier of the data is the first service identifier or The second service identifier; the second service identifier belongs to the service identifier of the priority service agreed between the site and the access point, and the second service identifier
  • a service identifier is a service identifier that does not belong to the priority service agreed between the station and the access point.
  • the second frame if the second frame also includes a second field, the second frame is used to instruct the station to perform the third operation during the silent interval; adverse effects on the transmission of data with the second service identifier can be avoided. If the second frame does not include the second field, the second frame is used to instruct the station to send data after competing for the channel; this allows the station to transmit data in a timely manner.
  • the present application provides another channel access method, which method includes: the access point sends a second frame, the first field in the second frame is used to indicate one or more defined target wake-up times of the station In the service phase, the third field in the second frame indicates the channel access rule when the station does not need to transmit data with the second service identifier at the start time of the limited target wake-up time service phase; if the second frame Includes a second field, the second field is used to indicate one or more silent intervals of the site, the starting time of any silent interval is the same as the starting time of any defined target wake-up time service phase, the third The second frame is used to instruct the station to perform the fourth operation in the silent interval, and the fourth operation complies with the channel access rule; the fourth operation includes any of the above and the following: sending data after competing for the channel, The service identifier of the data belongs to the first service identifier; no data is sent (or no channel competition is performed); after obtaining the data of the second service identifier to be sent, competition for the channel
  • the starting time of any silent interval is the same as the starting time of any defined target wake-up time service phase, so
  • the second frame is used to instruct the station to send data after competing for the channel.
  • the service identifier of the data is the first service identifier or the second service identifier; the second service identifier belongs to the station.
  • the service identifier of the priority service agreed with the access point, and the first service identifier does not belong to the service identifier of the priority service agreed between the station and the access point.
  • the third field in the second frame indicates the channel access rule when the station does not need to transmit any data with the second service identifier at the start time of the limited target wake-up time service phase, and the station can be flexibly configured. Define the channel access rule when the start time of the target wake-up time service phase does not require transmission of any data with the second service identifier, and reduce the adverse impact on the transmission of data with the second service identifier.
  • the third operation is: after the competition reaches After the channel, data is sent, and the service identifier of the data belongs to the second service identifier or the first service identifier; or, if the third field indicates that the data with the first service identifier is prohibited from competing for the channel during the silent interval, And the competition can be continued after the silent interval ends.
  • the third operation is: not sending the data of the first service identifier; or, if the third field indicates that the data of the first service identifier is prohibited from competing in the silent interval.
  • the data of the first service identifier is allowed to compete for the channel.
  • the third operation is: competing for the channel in the access type corresponding to the first service identifier. In the case of , before sending the data of the first service identifier, the data of the second service identifier is sent.
  • the third field indicates the channel access rule for the data of the first service identifier within the silent interval, and the third operation performed by the station in any of the above silent intervals conforms to the channel access rule.
  • Adverse effects on the transmission of r-TWT TID data can be reduced by flexibly indicating the channel access rules for the station's first service identification data within the silent interval.
  • the station if the third field indicates that the station does not need to transmit any data of the second service identifier at the start time of the defined target wake-up time service phase
  • the fourth operation is: after competing for the channel, send data, and the service identifier of the data belongs to the first service identifier; if the third field indicates When the station does not need to transmit any data of the second service identifier at the start time of the limited target wake-up time service phase, the station is prohibited from competing for the channel in the silent interval, and can continue to compete after the silent interval ends.
  • the fourth operation is: do not send data; or, if the third field indicates that the station does not have any of the second service targets at the start time of the defined target wake-up time service phase
  • the station is prohibited from competing for the channel in the silent interval.
  • the fourth operation is: after obtaining the second service identification to be sent, After the service identification data, competition for the channel begins. Before obtaining the data of the second service identifier to be sent, the station is prohibited from competing for the channel in the silent interval.
  • the third field indicates the channel access rule for the data of the first service identifier within the silent interval.
  • the fourth operation performed by the station in any of the above silent intervals conforms to the channel access rule, and the station can be flexibly instructed.
  • Channel access rules for the data of the first service identifier within the silent interval in order to reduce the adverse impact on the transmission of r-TWT TID data.
  • an embodiment of the present application provides a communication device, which has the function of realizing the behavior in the method embodiment of the first aspect.
  • the communication device may be a communication device, a component of the communication device (such as a processor, a chip, or a chip system, etc.), or a logic module or software that can realize all or part of the functions of the communication device.
  • the functions of the communication device can be implemented by hardware, or by hardware executing corresponding software.
  • the hardware or software includes one or more modules or units corresponding to the above functions.
  • the communication device includes a transceiver module and a processing module, wherein: the transceiver module is configured to receive a first frame, and the first field in the first frame is used to indicate one or more of the site. Multiple defined target wake-up time service phases; if the first frame also includes a second field, the second field is used to indicate one or more silent intervals of the site, and the start time of any silent interval is the same as any The starting time of a defined target wake-up time service phase is the same.
  • the processing module is configured to perform a first operation in any silent interval. The first operation includes any of the following: not sending the first service identifier.
  • the processing module is also used to send data, the service identifier of the data is the first service identifier or the second service identifier, and the second field is used to indicate one or more of the site.
  • Silent intervals the starting time of any silent interval is the same as the starting time of any limited target wake-up time service phase; the second service identifier belongs to the service identifier of the priority service agreed between the station and the access point, so The first service identifier does not belong to the service identifier of the priority service agreed between the station and the access point.
  • the access type corresponding to the first service identifier is different from the access type corresponding to the second service identifier.
  • an embodiment of the present application provides a communication device, which has the function of implementing the behavior in the method embodiment of the second aspect.
  • the communication device may be a communication device, a component of the communication device (such as a processor, a chip, or a chip system, etc.), or a logic module or software that can realize all or part of the functions of the communication device.
  • the functions of the communication device can be implemented by hardware, or by hardware executing corresponding software.
  • the hardware or software includes one or more modules or units corresponding to the above functions.
  • the communication device includes a transceiver module and a processing module, wherein: the transceiver module is configured to receive a first frame, and the first field in the first frame is used to indicate one or more of the site. Multiple defined target wake-up time service phases; if the first frame also includes a second field, the second field is used to indicate one or more silent intervals of the site, and the starting time of any silent interval is the same as the start time of any silent interval. The starting time of any of the limited target wake-up time service phases is the same.
  • the processing module is configured to Perform a second operation in any of the silent intervals, and the second operation includes any of the following: not sending data of the first service identifier; changing the channel competition parameters of the access type corresponding to the first service identifier of the station is a group with a lower chance of channel access; or, if the first frame does not include the second field, the processing module is also configured to send data, and the service identifier of the data is the first industry Service identifier or the second service identifier, the second field is used to indicate one or more silent intervals of the site, the starting time of any silent interval and the starting time of any defined target wake-up time service phase The same; the second service identifier belongs to the service identifier of the priority service agreed between the site and the access point, and the first service identifier does not belong to the service identifier of the priority service agreed between the site and the access point.
  • the access type corresponding to the first service identifier is different from the access type corresponding to the second service identifier.
  • the second operation is not to send the data of the first service identifier; the processing module is also configured to obtain the to-be-sent data within the time indicated by any of the silent intervals. Compete for the channel after the data of the second service identifier; or, the processing module is also configured to compete for the channel after the end of any of the silent intervals.
  • an embodiment of the present application provides a communication device, which has the function of implementing the behavior in the method embodiment of the third aspect.
  • the communication device may be a communication device, a component of the communication device (such as a processor, a chip, or a chip system, etc.), or a logic module or software that can realize all or part of the functions of the communication device.
  • the functions of the communication device can be implemented by hardware, or by hardware executing corresponding software.
  • the hardware or software includes one or more modules or units corresponding to the above functions.
  • the communication device includes a transceiver module and a processing module, wherein: the processing module is configured to generate a first frame, and the first field in the first frame is used to indicate one or more of the site.
  • the transceiver module is used to send the first frame; if the first frame also includes a second field, the second field is used to indicate one or more of the sites silent intervals, the starting time of any silent interval is the same as the starting time of any defined target wake-up time service phase, and the first frame is used to instruct the station to perform the first operation in any silent interval,
  • the first operation includes any of the following: not sending the data of the first service identifier; in the case where the access type corresponding to the first service identifier competes for the channel, before sending the data of the first service identifier, send Data of the second service identifier; or, if the first frame does not include a second field, the second field is used to indicate one or more silent intervals of the site, and the starting time of any silent interval is the same as the start time of any silent interval.
  • the start time of a defined target wake-up time service phase is the same.
  • the first frame is used to instruct the station to send data after competing for the channel.
  • the service identifier of the data is the first service identifier or the third service identifier. Two service identifiers; the second service identifier belongs to the service identifier of the priority service agreed between the site and the access point, and the first service identifier does not belong to the service identifier of the priority service agreed between the site and the access point. .
  • the access type corresponding to the first service identifier is different from the access type corresponding to the second service identifier.
  • an embodiment of the present application provides a communication device, which has the function of implementing the behavior in the method embodiment of the fourth aspect.
  • the communication device may be a communication device, a component of the communication device (such as a processor, a chip, or a chip system, etc.), or a logic module or software that can realize all or part of the functions of the communication device.
  • the functions of the communication device can be implemented by hardware, or by hardware executing corresponding software.
  • the hardware or software includes one or more modules or units corresponding to the above functions.
  • the communication device includes a transceiver module and a processing module, wherein: the processing module is configured to generate a first frame, and the first field in the first frame is used to indicate one or more of the site. Multiple defined target wake-up time service phases; the transceiver module is used to send the first frame; if the first frame also includes a second field, the second field is used to indicate one or more of the sites silent intervals, the starting time of any silent interval is the same as the starting time of any defined target wake-up time service phase, and the first The frame is used to instruct the station to perform the second operation in any silent interval when there is no data of the second service identifier that needs to be transmitted at the starting time of any defined target wake-up time service phase,
  • the second operation includes any of the following: not sending data of the first service identifier; changing the channel competition parameters of the access type corresponding to the first service identifier of the station to a group with a lower channel access chance; or , if the first frame does not include a second field
  • the access type corresponding to the first service identifier is different from the access type corresponding to the second service identifier.
  • an embodiment of the present application provides a communication device, which has the function of implementing the behavior in the method embodiment of the fifth aspect.
  • the communication device may be a communication device, a component of the communication device (such as a processor, a chip, or a chip system, etc.), or a logic module or software that can realize all or part of the functions of the communication device.
  • the functions of the communication device can be implemented by hardware, or by hardware executing corresponding software.
  • the hardware or software includes one or more modules or units corresponding to the above functions.
  • the communication device includes a transceiver module and a processing module, wherein: the transceiver module is configured to receive a second frame, and the first field in the second frame is used to indicate one or more of the site.
  • the third field in the second frame indicates the channel access rule for the data of the first service identifier of the station; if the second frame also includes a second field, the second The field is used to indicate one or more silent intervals of the site.
  • the starting time of any silent interval is the same as the starting time of any defined target wake-up time service phase of the site.
  • the processing module is used to Perform a third operation in any of the silent intervals, and the third operation complies with the channel access rules; the third operation includes any of the above: sending data, the service identifier of the data belongs to the second service identifier or The first service identifier; do not send the data of the first service identifier; when the access type corresponding to the first service identifier competes for the channel, before sending the data of the first service identifier, send Data of the second service identifier; or, if the second frame does not include the second field, the processing module is configured to send data after competing for the channel, and the service identifier of the data is the first service identifier.
  • the second field is used to indicate one or more silent intervals of the site, and the starting time of any silent interval is the same as the starting time of any defined target wake-up time service phase;
  • the second service identifier belongs to the service identifier of the priority service agreed between the site and the access point, and the first service identifier does not belong to the service identifier of the priority service agreed between the site and the access point.
  • the access type corresponding to the first service identifier is different from the access type corresponding to the second service identifier.
  • an embodiment of the present application provides a communication device, which has the function of implementing the behavior in the method embodiment of the sixth aspect.
  • the communication device may be a communication device, a component of the communication device (such as a processor, a chip, or a chip system, etc.), or a logic module or software that can realize all or part of the functions of the communication device.
  • the functions of the communication device can be implemented by hardware, or by hardware executing corresponding software.
  • the hardware or software includes one or more modules or units corresponding to the above functions.
  • the communication device includes It includes a transceiver module and a processing module, wherein: the transceiver module is used to receive a second frame, the first field in the second frame is used to indicate one or more defined target wake-up time service phases of the site, and the third The third field in the second frame indicates the channel access rule when the station does not need to transmit any data with the second service identifier at the start time of the defined target wake-up time service phase; if the second frame also includes the second field , the second field is used to indicate one or more silent intervals of the site, the starting time of any silent interval is the same as the starting time of any defined target wake-up time service phase, the processing module is used to When there is no data of the second service identifier that needs to be transmitted at the starting time of any defined target wake-up time service phase, a fourth operation is performed in the silent interval, and the fourth operation is consistent with the channel connection.
  • the fourth operation includes any of the above and the following: sending data, the service identifier of the data belongs to the first service identifier; not sending data (or not competing for the channel); after obtaining the third to be sent After competing for the channel, start competing for the channel; or, if the second frame does not include the second field, the processing module is configured to send data after competing for the channel, and the service identifier of the data is the The first service identifier or the second service identifier, the second field is used to indicate one or more silent intervals of the site, the starting time of any silent interval and the start of any defined target wake-up time service phase The start time is the same; the second service identifier belongs to the service identifier of the priority service agreed between the site and the access point, and the first service identifier does not belong to the service identifier of the priority service agreed between the site and the access point. .
  • an embodiment of the present application provides a communication device, which has the function of implementing the behavior in the method embodiment of the seventh aspect.
  • the communication device may be a communication device, a component of the communication device (such as a processor, a chip, or a chip system, etc.), or a logic module or software that can realize all or part of the functions of the communication device.
  • the functions of the communication device can be implemented by hardware, or by hardware executing corresponding software.
  • the hardware or software includes one or more modules or units corresponding to the above functions.
  • the communication device includes a transceiver module and a processing module, wherein: the processing module is configured to generate a second frame, and the first field in the second frame is used to indicate one or more of the site.
  • the third field in the second frame indicates the channel access rule for the data of the first service identifier of the station; the transceiver module is used to send the second frame; If the second frame further includes a second field, the second field is used to indicate one or more silent intervals of the site, the starting time of any silent interval and any defined target wake-up time service phase of the site The starting time is the same, and the second frame is used to instruct the station to perform a third operation in the silent interval, and the third operation complies with the channel access rule; the third operation includes any of the above and the following Item: After competing for the channel, send data whose service identifier belongs to the second service identifier or the first service identifier; do not send data with the first service identifier; When the access type competes for the channel, before sending the data of the first service identifier, the data of the second service identifier is sent; or, if the second frame does not include the second field, the second field is In order to indicate one
  • an embodiment of the present application provides a communication device, which has the function of implementing the behavior in the method embodiment of the eighth aspect.
  • the communication device may be a communication device, a component of the communication device (such as a processor, a chip, or a chip system, etc.), or a logic module or software that can realize all or part of the functions of the communication device.
  • the functions of the communication device can be implemented by hardware, or can be implemented by hardware executing corresponding software.
  • the hardware or software Includes one or more modules or units corresponding to the above functions.
  • the communication device includes a transceiver module and a processing module, wherein: the transceiver module is configured to send a second frame, and the first field in the second frame is used to indicate one or more of the site. Multiple limited target wake-up time service phases, the third field in the second frame indicates the channel access rule when the station does not need to transmit data with the second service identifier at the start time of the limited target wake-up time service phase; If the second frame includes a second field, the second field is used to indicate one or more silent intervals of the station, the start time of any silent interval and the start of any defined target wake-up time service phase.
  • the time is the same, and the second frame is used to indicate that the station does not need to transmit data of the second service identifier at the start time of any defined target wake-up time service phase, indicating that the station is in the silent interval.
  • Perform a fourth operation which complies with the channel access rule; the fourth operation includes any of the following: after competing for the channel, send data, and the service identifier of the data belongs to the first service identifier ;Do not send data (or do not compete for the channel); after obtaining the data of the second service identifier to be sent, start competing for the channel; or, if the second frame does not include the second field, the second The field is used to indicate one or more silent intervals of the station.
  • the starting time of any silent interval is the same as the starting time of any defined target wake-up time service phase.
  • the second frame is used to indicate that the station is in After competing for the channel, data is sent, and the service identifier of the data is the first service identifier or the second service identifier; the second service identifier belongs to the service identifier of the priority service agreed between the site and the access point. , the first service identifier does not belong to the service identifier of the priority service agreed between the station and the access point.
  • the second frame is used to indicate that the station performs the fourth step in the silent interval when no data with the second service identifier needs to be transmitted at the starting time of any defined target wake-up time service phase. operate.
  • inventions of the present application provide another communication device.
  • the communication device includes a processor.
  • the processor is coupled to a memory.
  • the memory is used to store programs or instructions. When the program or instructions are executed by the processor , causing the communication device to perform the method shown in any possible implementation manner of the above-mentioned first to eighth aspects.
  • the process of sending information (or signals) in the above method can be understood as a process of outputting information based on instructions of the processor.
  • the processor In outputting information, the processor outputs the information to the transceiver for transmission by the transceiver. After the information is output by the processor, it may also need to undergo other processing before reaching the transceiver.
  • the processor receives incoming information
  • the transceiver receives the information and feeds it into the processor. Furthermore, after the transceiver receives the information, the information may need to undergo other processing before being input to the processor.
  • the above-mentioned processor may be a processor specifically designed to perform these methods, or may be a processor that executes computer instructions in a memory to perform these methods, such as a general-purpose processor.
  • the processor may also be configured to execute a program stored in the memory.
  • the communication device performs the method shown in the above-mentioned first aspect or any possible implementation of the first aspect.
  • the memory is located outside the communication device. In a possible implementation, the memory is located within the above communication device.
  • the processor and the memory may be integrated into one device, that is, the processor and the memory may be integrated together.
  • the communication device further includes a transceiver, which is used to receive signals or send signals, etc.
  • the present application provides another communication device.
  • the communication device includes a processing circuit and an interface circuit.
  • the interface circuit is used to obtain data or output data; the processing circuit is used to perform the above-mentioned first to eighth aspects.
  • the corresponding method is shown for any possible implementation.
  • the present application provides a computer-readable storage medium.
  • a computer program is stored in the computer-readable storage medium.
  • the computer program includes program instructions. When executed, the program instructions cause the computer to perform the above-described first aspect to The method shown in any possible implementation of the eighth aspect.
  • the present application provides a computer program product.
  • the computer program product includes a computer program.
  • the computer program includes program instructions. When executed, the program instructions cause the computer to perform any of the above-described first to eighth aspects. The implementation method is shown.
  • the present application provides a communication system, including the communication device described in the ninth aspect or any possible implementation of the ninth aspect, and the eleventh aspect or any possible implementation of the eleventh aspect.
  • the communication system includes the communication device described in the above-mentioned tenth aspect or any possible implementation manner of the tenth aspect, and the communication device described in the above-mentioned twelfth aspect or any possible implementation manner of the twelfth aspect.
  • the communication system includes the communication device described in the thirteenth aspect or any possible implementation of the thirteenth aspect, and the communication device described in the fifteenth aspect or any possible implementation of the fifteenth aspect.
  • the communication system includes the communication device described in the fourteenth aspect or any possible implementation of the fourteenth aspect, and the communication device described in the sixteenth aspect or any possible implementation of the sixteenth aspect. .
  • FIG. 1 is a WLAN communication system provided by this application.
  • FIG. 2A is an example of a TWT element field provided by this application.
  • Figure 2B is an example of a silent interval element field provided by this application.
  • Figure 3 is the interaction process provided by this application for non-AP EHT STA that wishes to use r-TWT SP to establish an agreement with the AP;
  • Figure 4 is a channel access flow chart based on the r-TWT mechanism provided by this application.
  • Figure 5 is another channel access flow chart based on the r-TWT mechanism provided by this application.
  • Figure 6 is an interaction flow chart of a channel access method provided by this application.
  • Figure 7 is an interaction flow chart of another channel access method provided by this application.
  • Figure 8 is an interaction flow chart of another channel access method provided by this application.
  • FIG. 9 is a schematic structural diagram of another TWT element domain provided by an embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of another TWT element domain provided by an embodiment of the present application.
  • Figure 11 is an interaction flow chart of another channel access method provided by this application.
  • Figure 12 is a schematic structural diagram of a communication device 1200 provided by an embodiment of the present application.
  • Figure 13 is a schematic structural diagram of another communication device 130 provided by an embodiment of the present application.
  • FIG. 14 is a schematic structural diagram of another communication device 140 provided by an embodiment of the present application.
  • an embodiment means that a particular feature, structure or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application.
  • the appearances of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those skilled in the art will understand, both explicitly and implicitly, that the embodiments described herein may be combined with other embodiments.
  • WLAN networks especially networks that apply the IEEE 802.11 system standard, as an example.
  • HIPERLAN high performance wireless LAN
  • WAN wide area network
  • PAN personal area network
  • the embodiments of this application can also be applied to wireless local area network systems such as Internet of Things (IoT) networks or Vehicle to X (V2X).
  • IoT Internet of Things
  • V2X Vehicle to X
  • the embodiments of the present application can also be applied to other possible communication systems, such as long term evolution (long term evolution, LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (time division) system duplex (TDD), universal mobile telecommunication system (UMTS), global interoperability for microwave access (WiMAX) communication system, fifth generation (5th generation, 5G) communication system, and future Sixth generation (6th generation, 6G) communication system, etc.
  • LTE long term evolution
  • FDD frequency division duplex
  • TDD LTE time division duplex
  • UMTS universal mobile telecommunication system
  • WiMAX global interoperability for microwave access
  • 5G fifth generation
  • 6th generation, 6G Sixth generation
  • the WLAN communication system shown in Figure 1 is an example of a wireless communication system that can be used with the technical solution provided by this application.
  • the communication system includes an access point (AP) and one or more STAs (only STA1 and STA2 are shown).
  • both the access point and the STA support WLAN protocols.
  • the WLAN protocols can include IEEE 802.11be (or Wi-Fi 7, EHT protocol), and can also include IEEE802.11ax, IEEE 802, 11ac and other protocols.
  • IEEE 802.11be or Wi-Fi 7, EHT protocol
  • IEEE802.11ax IEEE 802, 11ac
  • the WLAN protocol can also include the next generation protocol of IEEE802.11be and so on.
  • the device that implements the method of the present application may be an access point or STA in the WLAN, or a chip or processing system installed in the access point or STA.
  • STA1 and STA2 in the basic service set can compete for channels to seize channel resources.
  • An access point is a device with wireless communication capabilities that supports communication using the WLAN protocol and has the ability to communicate with WLAN The ability to communicate with other devices on the network, such as stations or other access points. Of course, it can also have the function of communicating with other devices.
  • a WLAN system includes one or more access point (AP)-type stations and one or more non-access point-type stations (none access point station, non-AP STA).
  • AP access point
  • non-AP STA one access point station
  • this article calls the access point type site an access point (AP), and the non-access point type site is called a station (STA).
  • the access point can be a complete device, or a chip or processing system installed in the complete device. Devices equipped with these chips or processing systems can implement the methods and functions of the embodiments of the present application under the control of the chips or processing systems (ie, AP).
  • the AP in the embodiment of this application is a device that provides services for a station (Station, STA) and can support 802.11 series protocols, such as 802.11ac, 802.11n, 802.11g, 802.11b and 802.11a, 802.11be, Wi-Fi 8 or The next generation and so on.
  • the AP can be a communication entity such as a communication server, router, switch, and bridge.
  • APs can include macro base stations, micro base stations (also called small stations), pico base stations, femto base stations, relay stations, access points, gNBs, transmission reception points (TRP), evolved Node Bs (evolved Node B , eNB), radio network controller (radio network controller, RNC), home base station (for example, home evolved NodeB, or home Node B, HNB), base band unit (base band unit, BBU), WiFi access point (access point , AP), integrated access and backhaul (IAB), etc.
  • the AP can also be chips and processing systems in these various forms of devices, thereby implementing the methods and functions of the embodiments of the present application.
  • a station is a device with wireless communication capabilities that supports communication using the WLAN protocol and has the ability to communicate with other stations or access points in the WLAN network.
  • STA is any communication device that allows the user to communicate with the AP and then with the WLAN.
  • the communication device can be a complete device, or it can be a chip or processing system installed in the complete device. Equipment equipped with these chips or processing systems can implement the methods and functions of the embodiments of the present application under the control of the chips or processing systems (ie, sites).
  • STA can include mobile phones (mobile phones), mobile stations (MS), tablets (pads), computers with wireless transceiver functions (such as laptops), virtual reality (VR) devices, augmented reality (Augmented) reality, AR) equipment, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical, and wireless terminals in smart grid , wireless terminals in transportation safety, wireless terminals in smart city, wireless terminals in smart home, subscriber unit, cellular phone, wireless data Cards, personal digital assistant (PDA) computers, tablet computers, laptop computers, machine type communication (MTC) terminals, etc.
  • Stations may include a variety of handheld devices, vehicle-mounted devices, wearable devices, computing devices, or other processing devices connected to wireless modems with wireless communications capabilities.
  • the station can be a handheld device (handset) with wireless communication function, a vehicle-mounted device, a wearable device or a terminal in the Internet of Things, the Internet of Vehicles, 5G and any form of terminal in the communication system evolved after 5G, etc.
  • the site can support 802.11 series protocols, such as 802.11ac, 802.11n, 802.11g, 802.11b, 802.11a, 802.11be, Wi-Fi 8 or its next generation and other WLAN standards.
  • TWT Target wakeup time
  • r-TWT is a new mechanism to ensure low-latency services derived from the existing broadcast TWT of IEEE 802.11ax.
  • Non-AP EHT STA refers to non-AP STA that supports the 802.11be standard.
  • the traffic of these real-time applications has very strict latency requirements (stringent latency requirements), and based on this, the r-TWT mechanism is proposed.
  • the AP publishes r-TWT through beacon frames or probe response frames.
  • the r-TWT information may indicate one or more r-TWT service periods (service periods, SPs), and one or more quiet intervals (quiet intervals).
  • the r-TWT service phase is referred to as r-TWT SP below.
  • r-TWT information is indicated in the TWT element field.
  • FIG. 2A is an example of a TWT element field provided by this application.
  • the TWT element field includes: element identification (Element ID), length (Length), control (Control) field and TWT parameter information (TWTParameter Information); among them, the element identification occupies one byte and the length occupies one word section, the control field occupies one byte, and the bytes occupied by the TWT parameter information are variable length, that is, the number of bytes occupied by the TWT parameter information is variable.
  • control fields may include: No Data Paging Indicator (NDPPaging Indicator), Response PM Mode), Negotiation Type (NegotiationType), TWT Information Frame Disabled (TWTInformation Frame Disabled), and Wake-up Duration Unit (WakeDuration Unit), Link ID Bitmap Present, and Reserved; among them, the negotiation type occupies 2 bits and other subfields occupies 1 bit.
  • the TWT parameter information includes: Broadcast TWT Parameter Set 1, Broadcast TWT Parameter Set 2 (Broadcast TWT Parameter Set 2), and other Broadcast TWT parameter sets (not shown).
  • broadcast TWT parameter set 1 includes: request type (RequestType), target wake time (TargetWake Time), minimum TWT wake duration (NominalMinimum TWT Wake Duration), TWT wake interval mantissa (TWTWake Interval Mantissa), broadcast TWT information ( Broadcast TWT Info), r-TWT traffic information (Restricted TWT Traffic Info); among them, r-TWT business information is optional (optional), and the number below each subdomain included in broadcast TWT parameter set 1 indicates that the subdomain is occupied The number of bytes.
  • broadcast TWT information includes: restricted TWT traffic information subdomain presence indication (Restricted TWT Traffic Info Present), reserved (Reserved), broadcast TWT identification (Broadcast TWT ID), broadcast TWT duration (Broadcast TWT Persistence), The number below each subfield included in the broadcast TWT information indicates the number of bits occupied by the subfield.
  • the r-TWT service information includes: service control information (TrafficInfo Control), r-TWT downlink TID bitmap (Restricted TWT DL TID Bitmap), r -TWT upstream TID bitmap (Restricted TWT UL TID Bitmap).
  • the service information control subfield includes: Downlink TID Bitmap Valid (DL TID Bitmap Valid), Uplink TID Bitmap Valid (UL TID Bitmap Valid), and Reserved (Reserved).
  • Each service information control subfield includes The number below the subfield indicates the number of bits occupied by the subfield.
  • STA and AP can negotiate the limited target wake-up time service period (r-TWT service period, r-TWT TID) through the r-TWT downlink TID bitmap and r-TWT uplink TID bitmap.
  • the r-TWT service information subfield is used by STA and AP to negotiate uplink/downlink r-TWT TID and non-rTWT TID.
  • One r-TWT service information subfield corresponds to one r-TWT SP.
  • r-TWT TID refers to one or more uplink (UL) TID and downlink (downlink, DL) TID of STA priority service in r-TWT SP.
  • TIDs other than r-TWT TID are called non-rTWT TID.
  • the r-TWT TID can be understood as one or more TIDs (including downlink TID and uplink TID) that the STA preferentially serves in the r-TWT SP negotiated between the STA and the AP.
  • each bit in the r-TWT downlink TID bitmap corresponds to a downlink TID.
  • the bit with a value of 1 corresponds to the downlink TID of r-TWT TID (downlink TID), and the bit with a value of 0 corresponds to
  • the downstream TID is non-rTWT TID.
  • each bit in the r-TWT upstream TID bitmap corresponds to an upstream TID.
  • the bit with a value of 1 corresponds to the upstream TID of r-TWT TID (upstream TID), and the bit with a value of 0 corresponds to
  • the upstream TID is non-rTWT TID (upstream TID).
  • the TWT parameter information includes one or more broadcast TWT parameter sets, such as broadcast TWT parameter set 1 and broadcast TWT parameter set 2 shown in Figure 2A.
  • the Broadcast TWT Recommendation subfield (Broadcast TWT Recommendation) in the request type field of each broadcast TWT parameter set is used to indicate the TWT type specified by the broadcast TWT parameter set.
  • the value of the broadcast TWT recommended subfield is 4, indicating that this broadcast TWT parameter set corresponds to an r-TWT.
  • This request type is IEEE Introduced by 802.11be, it cannot be understood by traditional sites.
  • the broadcast TWT information subfield (Broadcast TWT Info) in the TWT element field contains a one-bit r-TWT service information subfield existence indication subfield ( Restricted TWT Traffic Info Present).
  • the value of the r-TWT service information subfield existence indication subfield is 1, which means that the TWT element field contains the r-TWT service information subfield (Restricted TWT Traffic Info) shown in Figure 2A.
  • the value of the r-TWT service information subfield existence indication subfield is 0, which means that the TWT element field does not contain the r-TWT service information subfield shown in the figure.
  • the Broadcast TWT ID subfield indicates the identification number of the TWT group. In Figure 2A, the meaning of each subfield or field can be found in relevant standards, such as the 802.11 series protocols.
  • Figure 2B is an example of a silent interval element field provided by this application.
  • the quiet interval element field includes: element identification (Element ID) field, length (Length) field, quiet count (QuierCount) field, quiet period (QuietPeriod) field, quiet length (QuietDuration) field, quiet offset (QuietOffet) field.
  • element ID element identification
  • QuantierCount quiet count
  • QuantietPeriod quiet period
  • quiet length QietDuration
  • quiet offset QietOffet
  • the Quiet Interval (QI) element field can be included in beacon frames, probe response frames, etc. Beacon frames, detection response frames, etc. may include both the TWT element field and the silent interval element field.
  • the TWT element field and the silent interval element field can be regarded as two elements in frames such as beacon frames and detection response frames.
  • the site can determine the start time and duration of one or more silent intervals based on the silent interval element field.
  • the silence length indicates the length of the silence interval, and the silence count and silence offset can be used to determine the start time of the silence interval.
  • Non-AP EHT STAs that wish to use r-TWT SP need to first establish an r-TWT agreement (r-TWT agreement) with the AP to join one or more r-TWT groups (for example, the AP groups by broadcasting TWT ID).
  • the AP and different STAs can establish r-TWT agreements respectively.
  • Figure 3 shows the interaction process provided by this application for non-AP EHT STA that wishes to use r-TWT SP to establish an agreement with the AP.
  • the interaction process between the non-AP EHT STA that wants to use r-TWT SP and the AP to establish an agreement is as follows: Extremely high throughput station 1 (EHT STA 1) to the extremely high throughput access point (EHT AP) Send an r-TWT Setup Request Frame (r-TWT Setup Request Frame); after receiving the r-TWT Setup Request Frame, the EHT AP replies with an r-TWT Setup Response Frame (r-TWT Setup Response Frame) to the EHT STA1.
  • EHT STA Extremely high throughput station 1
  • EHT AP Send an r-TWT Setup Request Frame
  • r-TWT Setup Request Frame After receiving the r-TWT Setup Request Frame, the EHT AP replies with an r-TWT Setup Response Frame (r-TWT Setup Response Frame) to the EHT STA1.
  • r-TWT Setup Response Frame r-TWT Setup Response Frame
  • non-AP EHT STA sends an r-TWT establishment request frame to join at most one r-TWT group. If the non-AP EHT STA needs to join multiple r-TWT groups, it needs to establish r-TWT agreements with the AP multiple times and join one r-TWT group each time.
  • the r-TWT establishment request frame and r-TWT establishment response frame contain the r-TWT service information subfield (Restricted TWT Traffic Info), see Figure 2A.
  • the r-TWT traffic information subfield contains downlink and uplink traffic identifier (TID) indications respectively, that is, the r-TWT downlink TID bitmap and the r-TWT uplink TID bitmap in Figure 2A.
  • TID traffic identifier
  • the non-AP EHT STA and the AP negotiate the r-TWT TID through the r-TWT service information subfield. For example, each bit in the r-TWT downlink TID bitmap (one byte) corresponds to a downlink TID.
  • the bit with a value of 1 corresponds to the downlink TID of r-TWT TID (downlink TID), and the bit with a value of 0 corresponds to The downstream TID is non-rTWT TID.
  • each bit in the r-TWT upstream TID bitmap (one byte) corresponds to an upstream TID.
  • the bit with a value of 1 corresponds to the upstream TID of r-TWT TID (upstream TID), and the bit with a value of 0 corresponds to The upstream TID is non-rTWT TID (upstream TID).
  • relevant standards such as the 802.11 series protocols, which will not be described here.
  • non-AP EHT STA After joining one or more r-TWT groups, non-AP EHT STA can use r-TWT SP.
  • the sites involved in this application are mainly divided into three categories.
  • the first category is EHTSTA that belongs to the r-TWT group
  • the second category is EHTSTA that does not belong to the r-TWT group
  • the EHTSTA belonging to the r-TWT group may be called an r-TWT scheduled STA (r-TWT scheduled STA).
  • the first type of site and the second type of site are sites that support the 802.11be standard, that is, ETH STA.
  • Non-ETH STA refers to sites that do not support the 802.11be standard, such as traditional sites.
  • the first type of site and the second type of site are distinguished from the perspective of whether the site belongs to (or can use) a certain r-TWT SP. If a site belongs to (or can be used by) a certain r-TWT SP, the site is a first-category site for the r-TWT SP. In other words, if a site joins the r-TWT group corresponding to a certain r-TWT SP, then for the r-TWT SP, the site is a first-category site.
  • a site does not belong to (or cannot be used) a certain r-TWT SP, for the r-TWT SP, the site is a second-category site. In other words, if a site has not joined the r-TWT group corresponding to a certain r-TWT SP, then for the r-TWT SP, the site is a second type site.
  • EHTSTA can determine whether it belongs to (can be referred to as belonging to for short) the beacon frame or probe response frame indication through the Broadcast TWT ID subfield in the TWT element field in the beacon frame or probe response frame sent by the AP.
  • r-TWT SP The broadcast TWT identification subfield indicates the identification number of the TWT group.
  • the EHT STA can determine that it belongs to the r-TWT SP corresponding to the identification number of the TWT group.
  • the TWT element field in the beacon frame or probe response frame sent by the AP can indicate one or more r-TWT SPs, and each r-TWT SP corresponds to the identification number of a TWT group.
  • multiple broadcast TWT parameter sets in the TWT element field each correspond to an r-TWT SP.
  • the broadcast TWT identifier in each broadcast TWT parameter set represents the identification number of a TWT group.
  • the identification number of the TWT group corresponds to the Broadcast the r-TWT SP corresponding to the TWT parameter set.
  • Figure 4 is a channel access flow chart based on the r-TWT mechanism provided by this application.
  • the channel access process shown in Figure 4 shows the principle of the r-TWT mechanism.
  • the extremely high throughput access point (EHT AP) sends a beacon frame (Beacon).
  • the beacon frame indicates the starting time of one or more r-TWT SPs.
  • the EHT AP can Set a quiet interval (quiet interval) aligned with the starting time of r-TWT SP in the standard frame, with a duration of 1 millisecond (ms); EHTSTA 1 belonging to the r-TWT group can ignore the above quiet interval, that is, in r- After the TWT SP starts, it competes for the channel and sends data frames after competing for the channel; EHTSTA 2 and non-ETH STA 3 that do not belong to the r-TWT group need to remain silent according to the silent interval.
  • the length of the silent interval is generally shorter than the length of r-TWT SP.
  • a silent interval aligned with the start time of r-TWT SP refers to a silent interval whose start time is the same as the start time of r-TWT SP.
  • the start time of multiple silent intervals and the duration of each silent interval can be indicated in the beacon frame.
  • Figure 4 shows only one first category site (i.e., EHTSTA 1 within the r-TWT group), one second category site (i.e., EHTSTA 2 that does not belong to the r-TWT group), and one third category site (i.e., EHTSTA 2 that does not belong to the r-TWT group) non-ETH STA 3).
  • an actual WLAN system may include one or more first-category sites, one or more second-category sites, and one or more third-category sites. This application does not limit the number of each type of site.
  • the r-TWT mechanism also requires that the r-TWT scheduling STA (such as EHTSTA 1 belonging to the r-TWT group) must transmit the upstream non- rTWT TID data.
  • the r-TWT mechanism also requires that the r-TWT scheduling STA cannot transmit non-rTWT TID data after competing for the channel within the entire r-TWT SP specified time before completing the upstream r-TWT TID data transmission. .
  • the data of r-TWT TID refers to the data whose service identifier belongs to r-TWT TID
  • the data of non-rTWT TID refers to the data whose service identifier belongs to non-rTWT TID.
  • the data of r-TWT TID means that the service identifier belongs to r-TWT TID
  • the data of non-rTWT TID means that the service identifier belongs to non-rTWT TID.
  • EHTSTA 1 belonging to the r-TWT group competes for the channel in the r-TWT SP, it first sends data frame 1, which is the data of the uplink r-TWT TID; in the uplink r-TWT TID
  • data frame 1 is the data of the uplink r-TWT TID
  • acknowledgment frame 1 is sent by the AP for data frame 1
  • acknowledgment frame 2 is sent by the AP for data frame 2.
  • the first type of station i.e. r-TWT scheduled STA
  • the second type of station such as EHTSTA 2 that does not belong to the r-TWT group
  • the third type of station such as non-ETH STA 3
  • the first type of station executes when the beacon frame (or other frame) sent by the AP indicates the silent interval.
  • the operation is the same as that performed by the first type of station when the beacon frame (or other frame) sent by the AP does not indicate a silent interval.
  • the beacon frame shown in Figure 4 includes a first field, which is used to indicate one or more r-TWT SPs of the EHT STA (any first type station).
  • the beacon frame may include
  • the second field may not include the second field.
  • the second field indicates the silent interval of the EHT STA.
  • the starting time of the silent interval is consistent with the time of any r-TWT SP (belonging to the r-TWT SP indicated by the first field). The starting time is the same.
  • the first type of station i.e., r-TWT scheduled STA
  • the first type of station performs operations when the beacon frame includes the second field.
  • the same operation as the first category of stations does when the beacon frame does not include the second field. That is, the first type of station does not care whether the beacon frame includes the second field. It can be understood that, for the AP, whether the beacon frame (or other frame) sent by the AP includes the second field is meaningless to the first type of station.
  • the AP can carry r-TWT SP information through beacon frames, detection response frames, TWT setup (Setup) frames, or other frames.
  • the beacon frame carrying r-TWT SP information is used as an example for description.
  • STA1 and STA2 in the basic service set can compete for channels to seize channel resources.
  • a possible way for STAs to compete for channels is as follows: STA uses channel competition parameter 1 to compete for channels of one or more access types corresponding to r-TWT TID, and uses channel competition parameter 2 to compete for channels of one or more access types corresponding to non-rTWT TIDs. Access types compete for channels; among them, channel competition parameter 1 and channel competition parameter 2 are any two sets of multiple sets of parameters of the STA used for channel competition.
  • the station can use two sets (or two sets) of EDCA parameter sets for channel access (or channel competition), one set is the enhanced distributed channel access (EDCA) parameter set, and the other is the enhanced distributed channel access (EDCA) parameter set.
  • One set is a multi-user (MU) EDCA parameter set.
  • the EDCA parameter set is an example of channel competition parameter 1
  • the MU EDCA parameter set is an example of channel competition parameter 2.
  • the site uses the MU EDCA parameter set for channel access. Its competition waiting time is longer and the backoff window is larger. Therefore, compared with using the traditional EDCA parameter set for channel access, the channel access has a lower priority.
  • the STA uses a backoff mechanism to compete for channels for the access type corresponding to r-TWT TID and/or the access type corresponding to non-rTWT TID.
  • a backoff mechanism to compete for channels for the access type corresponding to r-TWT TID and/or the access type corresponding to non-rTWT TID.
  • one or more access types corresponding to the r-TWT TID of the STA perform backoff, and one or more access types corresponding to the non-rTWT TID perform backoff; when an access type backs off to 0, the The access type contends for the channel.
  • the STA's access type can perform backoff by randomly generating a backoff count value (corresponding to a random window or contention window) and starting backoff.
  • Successful backoff to 0 can be considered as the access type competing for the channel.
  • the STA detects that the channel is idle once during the backoff process, its backoff count value is decremented by 1.
  • stations can use any method
  • the AP sets a silent interval aligned with the start time for the r-TWT SP.
  • the purpose is to ensure that the data of the r-TWT TID of the r-TWT scheduled STA (that is, the first type of station mentioned above) can be transmitted preferentially.
  • a certain r-TWT scheduling STA (belonging to the first category of sites mentioned above) does not have r-TWT TID data to transmit (for example, data transmission has been completed through random competition before )
  • the r-TWT scheduled STAs will still continue to compete for the channel.
  • FIG. 5 is another channel access flow chart based on the r-TWT mechanism provided by this application.
  • the entry point (EHT AP) sends a beacon frame (can be replaced by a detection response frame or other frame).
  • the beacon frame indicates the starting time of one or more r-TWT SPs.
  • the AP sets the same value as r in the beacon frame.
  • the two data frames sent by r-TWT scheduling STA 1 on the r-TWT SP are both non-rTWT TID data
  • the two acknowledgment frames sent by the AP are for the two data frames sent by the r-TWT SP.
  • r-TWT scheduling STA 1 means that when the start time of r-TWT SP arrives, there happens to be no r-TWT TID data, but it still competes for the channel and successfully competes for the channel, and then transmits non-rTWT TID STA with data
  • r-TWT scheduling STA 2 represents the STA that has r-TWT TID data that needs to be transmitted during the silent interval, but has not grabbed the channel.
  • non-rTWT TID data will be sent directly (because there is no r-TWT TID data, and it conforms to the r-TWT TID data specified in the r-TWT mechanism. transmission is completed), so that the competition and data transmission of its non-rTWT TID preempts the data transmission opportunity of the r-TWT TID of other r-TWT scheduled STA (STA 2 in the figure), thereby affecting the delay performance of other STA .
  • Figure 6 is an interaction flow chart of a channel access method provided by this application. As shown in Figure 6, the interaction process of this method includes:
  • the access point sends the first frame.
  • the station receives the first frame.
  • the first field in the first frame is used to indicate one or more defined target wake-up time service phases (r-TWT SP) for the station.
  • the r-TWT group corresponding to one or more r-TWT SPs indicated by the first field belongs to the r-TWT group that the station joins.
  • the first frame can be a beacon frame, a detection response frame, a TWT setup (Setup) frame, or any other frame that can indicate the r-TWT SP and silent interval.
  • the first frame may include a TWT element field as shown in FIG. 2A, and the TWT element field includes a first field.
  • the first field may be any broadcast TWT parameter set in the TWT element field of the first frame. Referring to Figure 2A, when the negotiation type value in the Control field in the TWT element field is 2, it means that the "TWT parameter information" in the TWT element field is broadcast TWT parameter information.
  • the value of "Broadcast TWT Recommendation" in the Reuest Type field in the Broadcast TWT parameter set is 4, indicating that this Broadcast TWT parameter set is an r-TWT parameter set.
  • the broadcast TWT parameter set (i.e. the first field) indicates an r-TWT SP. Each r-TWT SP is uniquely identified by the Broadcast TWT ID field.
  • the station performs different communication processing based on the first frame.
  • the protocol stipulates or pre-agrees whether the first frame includes the second field, so that the station can clearly understand the operations that need to be performed. That is to say, the operations performed by the station based on the first frame when the first frame includes the second field are stipulated or pre-agreed through the protocol, and the operations performed by the station based on the first frame when the first frame does not include the second period. .
  • the station when the first frame includes the second field, the station performs the following step 602 according to the first frame; when the first frame does not include the second field, the station performs the following step 603 according to the first frame; wherein,
  • the second field is used to indicate one or more silent intervals of the site.
  • the starting time of any silent interval is the same as the starting time of any defined target wake-up time service phase.
  • the first frame also includes a second field
  • the second field is used to indicate one or more silent intervals of the station, and the starting time of any silent interval is the same as the starting time of any defined target wake-up time service phase.
  • the site performs the first operation in any silent interval.
  • the above-mentioned first operation includes any of the following: not sending data with the first service identifier; in the case where the access type corresponding to the first service identifier competes for the channel, before sending the data with the above-mentioned first service identifier, sending the second Business identification data.
  • the above-mentioned second service identifier belongs to the service identifier of the priority service agreed between the above-mentioned station and the access point, that is, r-TWT TID.
  • the above-mentioned first service identifier does not belong to the service identifier of the priority service agreed between the above-mentioned station and the above-mentioned access point. In other words, the first service identifier belongs to non-rTWT TID.
  • Not sending the data of the first service identifier can be understood as: not sending any non-rTWT TID data during the silent interval.
  • sending the data with the second service identifier can be understood as: the station can transmit the data of non-rTWT TID only after the station has completed transmitting the data of r-TWT TID within the silent interval.
  • a possible implementation method for the site not to send the data of the first service identification is as follows: the site sets the internal basic service set (intra-BSS) network allocation for the access category (access category, AC) corresponding to the non-rTWT TID of the site.
  • Vector network allocation vector, NAV
  • the duration of NAV is set to the length of the silent interval, that is, the length.
  • the 802.11 standard stipulates that if the AC of a site is set to NAV, it cannot continue to back off from competing channels. In other words, after a station sets NAV on the AC corresponding to any non-rTWT TID, the AC cannot continue to back off from the competing channel (or stop competing for the channel).
  • the site sets intra-BSS NAV for the AC of the first service type, and the duration of the NAV is set to the length of the silent interval.
  • the AC corresponding to the first service identifier is different from the AC corresponding to the second service identifier. In this way, the AC corresponding to the first service identifier cannot continue to retreat from the competition channel, while the AC corresponding to the second service identifier continues to retreat from the competition channel. After the station's silent interval ends, the AC of the first service type continues to compete for the channel.
  • the site sets intra-BSS NAV for all ACs corresponding to non-rTWT TIDs that do not belong to the ACs corresponding to r-TWT TIDs, and the length of the NAV is set to the length of the silent interval. That is to say, if a non-rTWT TID of the station corresponds to the same AC as an r-TWT TID, the station does not set NAV for the AC. In this way, in order to avoid causing the AC corresponding to the r-TWT TID to be unable to continue to back off from the competing channel. .
  • the station does not set intra-BSS NAV for the AC corresponding to the r-TWT TID among the ACs corresponding to its non-rTWT TID; after any AC corresponding to both the non-rTWT TID and the r-TWT TID successfully competes for the channel, the station must The data of the r-TWT TID corresponding to the AC is transmitted first, and only after the data transmission of the r-TWT TID corresponding to the AC is completed, the data of the non-rTWT TID corresponding to the AC can be transmitted.
  • the station can distinguish the AC corresponding to non-rTWT TID and the AC corresponding to r-TWT TID, and only set NAV for the AC corresponding to non-rTWT TID that does not belong to the AC corresponding to r-TWT TID. This can not only prevent the AC corresponding to the non-rTWT TID from being unable to continue to compete for the channel, but also prevent the AC corresponding to the r-TWT TID from being unable to continue to retreat from the competing channel; it can ensure the delay performance of the r-TWT TID data.
  • a possible implementation of the station not sending the data of the first service identifier is as follows: after the AC corresponding to the first service identifier competes for the channel (for example, backing off to 0), the station does not send the data of the first service identifier, and restarts Choose a backoff count value to contend for the channel and keep the contention window size constant until the silence interval ends.
  • the AC corresponding to the above-mentioned first service identifier is different from the AC corresponding to the above-mentioned second service identifier. This can avoid causing the AC corresponding to the r-TWT TID to be unable to continue to back off the contention channel.
  • the station first transmits the data of the r-TWT TID corresponding to the AC until the r-TWT corresponding to the AC After the TID data transmission is completed, the non-rTWT TID data corresponding to the AC can be transmitted.
  • the technical purpose of the site not sending data of the first service identifier can be achieved, and the competition mechanism of the site does not need to be changed.
  • a possible implementation method for the station not to send the data of the first service identifier is as follows: after the AC corresponding to the first service identifier competes for the channel (that is, backs off to 0), the station does not send the data of the first service identifier, and restarts Choose a retreat The backoff count value is used to compete for the channel; after the backoff count value backs off to 0, the data of the first service identifier is not sent, and a backoff count value is selected again to compete for the channel; and so on, until the end of the silent interval.
  • the AC corresponding to the above-mentioned first service identifier is different from the AC corresponding to the above-mentioned second service identifier.
  • the station If a non-rTWT TID and a r-TWT TID correspond to the same AC, after the AC successfully competes for the channel, the station first transmits the data of the r-TWT TID corresponding to the AC until the r-TWT corresponding to the AC After the TID data transmission is completed, the non-rTWT TID data corresponding to the AC can be transmitted.
  • the technical purpose of the site not sending data of the first service identifier can be achieved, and the competition mechanism of the site does not need to be changed.
  • a possible implementation method for the station not to send the data of the first service identifier is as follows: making the AC corresponding to the first service identifier remain silent (or suspend, stop backing off the contention channel, etc.).
  • any of the above r-TWT SPs refers to any one of one or more r-TWT SPs of the station indicated by the first field in the first frame.
  • the first frame may also include a second field indicating one or more silent intervals for the station.
  • the above-mentioned second field may include silence count, silence period, silence length, and silence offset.
  • the second field in the first frame may be the silent interval element field in the first frame, see FIG. 2B.
  • the one or more silent intervals indicated by the second field may not be for one or some sites, but for all sites. In a possible implementation, the second field only indicates the starting time of one or more silent intervals, but does not indicate (or limit) which site or sites these silent intervals belong to.
  • the one or more silent intervals indicated by the second field may be considered as silent intervals for any site.
  • any site can regard one or more silent intervals indicated by the second field as its own silent intervals.
  • the second field indicates the start time of one or more silent intervals, and indicates (or defines) which site or sites the one or more silent intervals belong to. If one or more silent intervals indicated by the second field belong to a certain site, then the site can, when the starting time of any silent interval is the same as the starting time of any r-TWT SP, when the starting time of any silent interval is within Perform the first action.
  • the site can remain silent according to the one or more silent intervals.
  • a station may use one or more r-TWT SPs indicated in the first field of the first frame.
  • the station belongs to (or belongs to) one or more r-TWT SPs indicated by the first field of the first frame.
  • the station joins the r-TWT group corresponding to one or more r-TWT SPs indicated by the first field of the first frame.
  • the station schedules STAs for r-TWT, that is, the station belongs to the first type of station mentioned above.
  • the site shown in Figure 6 is an example of the first type of site mentioned above. It should be understood that any first-category site can perform operations or processes performed by the site in Figure 6 .
  • the station determines whether it belongs to the r-TWT SP indicated by the first field through the broadcast TWT identification subfield in the broadcast TWT element in the first frame.
  • the station can perform the interaction process in Figure 3 with the AP to establish an r-TWT agreement, thereby joining one or more r-TWT groups.
  • each r-TWT group corresponds to an r-TWT SP.
  • the identification number of the TWT group represented by the broadcast TWT identification subfield belongs to the r-TWT group that the station joins, it can determine that it belongs to the r-TWT SP corresponding to the identification number of the TWT group.
  • the conditions for performing the first operation include: the first frame also includes a second field for indicating one or more silent intervals, and the starting time of any silent interval is the same as the first
  • the first field of a frame indicates The starting time of any r-TWT SP is the same.
  • the conditions for the station to perform the first operation during the silent interval indicated by the second field include: the first frame includes the second field, and the starting time of any silent interval indicated by the second field is the same as the start time indicated by the first field.
  • the starting time of any r-TWT SP is the same.
  • the site may use multiple methods to determine whether the conditions for performing the first operation in the silent interval indicated in the second field are met, which are not limited by this application.
  • the same start time means that the difference in time (that is, the difference between the start time of any silent interval and the start time of any r-TWT SP) is within a certain threshold, and can be regarded as the same start time. That’s it, no restrictions are made here.
  • the same starting time in this application means that those skilled in the art can understand that the starting time is the same, and it is not limited to being at the same moment to be called the same starting time.
  • the station after receiving the first frame sent by the AP, performs the following operations: determine whether the first frame includes a second field, where the starting time of any silent interval indicated by the second field is consistent with the station's The starting time of an r-TWT SP is the same; if so, perform the first operation within any silent interval. If the first frame includes the second field, the station can also compete for the channel with the second service identifier during any silent interval, and after competing for the signal, send data with the second service identifier.
  • the station after receiving the first frame sent by the AP, performs the following operations: determine whether it belongs to at least one r-TWT SP indicated by the first field in the first frame; after determining that the station belongs to the first field After indicating at least one r-TWT SP, determine whether the first frame includes a second field indicating one or more silent intervals; after determining that the first frame includes the second field, determine whether the start time of the silent interval is consistent with the The start time of any r-TWT SP to which the station belongs is the same; after determining that the start time of any silent interval is the same as the start time of any r-TWT SP to which the station belongs, the station shall The first action is performed during the silent interval.
  • the station determines that the start time of any silent interval indicated by the second field is the same as the start time of any r-TWT SP to which the station belongs, the station competes for the channel for the AC identified by the second service. If the station determines that it does not belong to the r-TWT SP indicated by the first field in the first frame, the station cannot use the r-TWT SP indicated by the first field.
  • the station after receiving the first frame sent by the AP, the station performs the following operations: records whether the AP sets the corresponding silent interval for the r-TWT SP to which the station belongs; if so, performs the above first step during the silent interval. operate. If not, after competing for the channel, the station sends data, and the service identifier of the data is the first service identifier or the second service identifier.
  • the records here can be replaced by determination, judgment, etc.
  • the station Record the AP and set the corresponding silent interval for the r-TWT SP to which the site belongs. For the AP, if the AP sets the corresponding silent interval for the r-TWT SP to which a certain station belongs, the AP allows the station to perform the first operation; otherwise, all TIDs of the station are allowed to compete for the channel in the r-TWT SP .
  • Step 602 can be replaced with: 603. If the first frame does not include the second field, the station sends data after competing for the channel.
  • the service identifier of the data is the first service identifier or the second service identifier.
  • the second field is used for Indicates one or more silent intervals for the above-mentioned sites.
  • the starting time of any silent interval is the same as the starting time of any r-TWT SP of the site.
  • the first frame does not include the second field, including two situations: one situation is that the first frame does not include any field indicating the silent interval, and the other situation is that the first frame includes one or more fields indicating the silent interval, but The starting time of the silent interval indicated by this one or more fields is different from the starting time of each r-TWT SP of the site.
  • An example of the first frame not including the second field is as follows: the first frame includes field 1, and the starting time of each silent interval indicated by field 1 is different from the starting time of each r-TWT SP of the site. If the first frame does not include the second field, all TIDs of the station can compete for channels in the r-TWT SP to which the station belongs.
  • the first frame does not include the second field, indicating that the AP has not set a silent interval for the r-TWT SP to which the station belongs.
  • the station sends data after competing for the channel; the data competing for the channel can be sent in time.
  • the station after receiving the first frame, performs the following operations: determine whether it belongs to the first word in the first frame segment indicates at least one r-TWT SP; after determining that the station belongs to at least one r-TWT SP indicated by the first field, determine whether the first frame includes a second field indicating a silent interval; if the first frame does not include the In the second field, the station starts to compete for the channel at the starting time of an r-TWT SP to which it belongs; after competing for the channel, it sends data, and the service identifier of the data is the first service identifier or the second service identifier.
  • the AC corresponding to one or more non-rTWT TIDs of the station and the AC corresponding to one or more r-TWT TIDs start at the start time of the r-TWT SP Competition channel; when an AC competes for the channel, data of the service identifier corresponding to the AC is sent.
  • the station first sends the data of the r-TWT TID corresponding to the AC, and then sends the data of the non-rTWT TID corresponding to the AC.
  • the above-mentioned second frame also includes a third field, the above-mentioned third field is used to indicate the channel access rule for the data of the above-mentioned first service identifier of the above-mentioned station, and the above-mentioned station during any of the above-mentioned silence intervals
  • the above-mentioned first operation performed complies with the above-mentioned channel access rules.
  • the above-mentioned third field indicates the operation performed by the above-mentioned station in any of the above-mentioned silent intervals.
  • the above-mentioned first operation is: do not send the above-mentioned information during any of the above-mentioned silence intervals.
  • the first operation is: when the access type corresponding to the first service identifier competes for the channel, before sending the data of the first service identifier, send the data of the second service identifier.
  • the third field indicates the channel access rule for the data of the first service identifier within the silent interval, and the first operation performed by the station in any of the above silent intervals conforms to the channel access rule. Adverse effects on the transmission of r-TWT TID data can be reduced by flexibly indicating the channel access rules for the station's first service identification data within the silent interval.
  • the first type of station performs the same operation when the first frame sent by the AP includes the second field and performs the same operation when the first frame does not include the second field.
  • the operation performed by the station when the first frame sent by the AP includes the second field is different from the operation performed when the first frame does not include the second field.
  • the first field in the first frame sent by the AP is used to indicate one or more r-TWT SPs of the site.
  • the first frame also includes a second field
  • the second field is used to indicate one or more silent intervals of the site, and the starting time of any silent interval is the same as any r-TWT SP of the site, the first frame Used to instruct the site to perform the first operation during any silent interval. If the starting time of each silent interval is different from the starting time of each r-TWT SP of the station, after the station competes for the channel within the silent interval, it sends data, and the service identifier of the data is the first service identifier or the second service identifier. Business identification.
  • the second field is used to indicate one or more silent intervals of the station, and the first frame is used to indicate that the station sends data after competing for the channel, and the service of the data
  • the identifier is the above-mentioned first service identifier or the above-mentioned second service identifier. It should be understood that in this application, whether the first frame sent by the AP includes the second field is meaningful to the first type of station. By sending the first frame that includes the second field and the first frame that does not include the second field, the AP can cause the station to perform different operations to ensure the delay performance of the station.
  • the station performs the first operation during the silent interval; this can avoid adverse effects on the transmission of r-TWT TID data, that is, the delay performance of the station in transmitting r-TWT TID data is guaranteed.
  • Embodiment 1 describes the channel access rules of the non-rTWT TID of the site (belonging to the first type of site mentioned above), and solves the problem of whether r-TWT is allowed to schedule STA during the silent interval after the r-TWT SP starts. non-rTWT TID for channel access issues.
  • Figure 7 is an interaction flow chart of another channel access method provided by this application. As shown in Figure 7, the interaction process of this method includes:
  • the access point sends the first frame.
  • the station receives the first frame.
  • the first field in the first frame is used to indicate one or more r-TWT SPs of the above-mentioned site.
  • step 701 please refer to step 601.
  • the station does not need to transmit the data of the second service identifier at the starting time of any r-TWT SP, if the first frame also includes a second field, the second field is used to indicate one or more of the station.
  • Silent interval the starting time of any silent interval is the same as the starting time of any r-TWT SP, and the site performs the second operation in any silent interval.
  • the above-mentioned second operation includes any of the following: not sending data with the first service identifier; changing the channel competition parameters of the AC corresponding to the first service identifier of the station to a group with a lower channel access chance.
  • the above-mentioned second service identifier belongs to the service identifier of the priority service agreed between the above-mentioned station and the access point, that is, r-TWT TID.
  • the above-mentioned first service identifier does not belong to the service identifier of the priority service agreed between the above-mentioned station and the above-mentioned access point. In other words, the first service identifier belongs to non-rTWT TID.
  • the implementation method of the station not sending the data of the first service identification can be referred to the implementation method of the station not sending the data of the first service identification in Embodiment 1, which will not be described in detail here.
  • Any r-TWT SP means any one of one or more r-TWT SPs of the station indicated by the first field in the first frame.
  • Changing the channel competition parameters of the AC corresponding to the first service identifier of the station to a group with a lower channel access chance can be understood as: the station adjusts the channel competition parameters of the AC corresponding to the first service identifier to a group with a lower chance.
  • there are two sets of channel competition parameters for the AC corresponding to the station's first service identifier i.e.
  • Non-rTWT TID the station adopts a set of channel competition parameters with a higher chance of channel access in the non-r-TWT SP: The AC corresponding to the first service identifier competes for the channel; within the silent interval whose start time is aligned with the start time of r-TWT SP, a set of channel competition parameters with a lower channel access probability is used to compete for the AC corresponding to the first service identifier. channel.
  • the station uses the same set of channel competition parameters in non-r-TWT SP and r-TWT SP to compete for the AC channel corresponding to the second service identifier.
  • Non-r-TWT SP refers to the time other than r-TWT SP.
  • the station receives the first frame, and the first field of the first frame indicates a certain r-TWT SP of the station; the station uses the EDCA parameter set as the first service before the start time of the r-TWT SP. Identifies the corresponding AC competition channel; when the starting time of the r-TWT SP is reached, and no data of the r-TWT TID needs to be transmitted, if the first frame also includes a second field, the second field The starting time of any indicated silent interval is the same as the starting time of the r-TWT SP.
  • the station uses the MU EDCA parameter set to compete for the AC channel corresponding to the first service identifier in any silent interval.
  • the AC corresponding to the first service identifier is different from the AC corresponding to the second service identifier. This can avoid changing the channel competition parameters of the AC corresponding to the second service identifier to a group with a lower channel access chance.
  • the station changes the channel competition parameters of the ACs corresponding to the non-rTWT TID that do not belong to the ACs corresponding to the r-TWT TID to a group with a lower channel access chance.
  • a non-rTWT TID of a station corresponds to the same AC as a r-TWT TID
  • the station does not change the channel competition parameters of the AC to a group with a lower chance of channel access, that is, the AC is maintained
  • the channel competition parameters remain unchanged.
  • the station must first transmit the data of the r-TWT TID corresponding to the AC until the data transmission of the r-TWT TID corresponding to the AC ends. After that, the data of the non-rTWT TID corresponding to the AC can be transmitted.
  • the station changes the channel competition parameters of the AC corresponding to the station's first service identifier to a group with a lower channel access chance; while reducing the adverse impact on the transmission of r-TWT TID data, it provides the ability to transmit r-TWT TID data opportunities.
  • the conditions for the station to perform the second operation include: the first frame includes a second field, and the starting time of any silent interval indicated by the second field is the same as the first The starting time of any r-TWT SP of the station indicated by the field is the same, and the station does not need to transmit the data of the second service identifier at the starting time of any r-TWT SP.
  • the site may use a variety of methods to determine whether the requirements for performing the second operation during the silent interval indicated in the second field are met. Conditions are not limited in this application.
  • the station after receiving the first frame sent by the AP, the station performs the following operations: records whether the first frame includes a second field, and the start time of any silent interval indicated by the second field is consistent with any of the station's The starting time of r-TWT SP is the same; at the starting time of any r-TWT SP, if there is no non-rTWT TID data to be transmitted, determine (or determine) whether the first frame includes the second field; If so, perform the second operation within any silent interval.
  • the first frame including the second field can be understood as: the AP sets the corresponding silent interval for the r-TWT SP to which the station belongs (corresponding to any of the above r-TWT SPs).
  • the station after receiving the first frame sent by the AP, performs the following operations: determine whether it belongs to at least one r-TWT SP indicated by the first field in the first frame; In the case of at least one r-TWT SP, the station determines (determines) whether there is no data of any r-TWT TID that needs to be transmitted at the starting time of any r-TWT SP to which it belongs; When no r-TWT TID data needs to be transmitted at the starting time of the TWT SP, if the first frame also includes a second field, the second field is used to indicate one or more silent intervals of the station, any The starting time of the silent interval is the same as the starting time of any r-TWT SP, and the station performs the second operation in any silent interval.
  • the station determines that it does not belong to the r-TWT SP indicated by the first field in the first frame, the station cannot use the r-TWT SP indicated by the first field.
  • the station needs to transmit r-TWT TID data at the starting time of any r-TWT SP, it can adopt the technical solution in Embodiment 1.
  • the station after receiving the first frame sent by the AP, the station performs the following operations: records whether the AP sets the corresponding silent interval for the r-TWT SP to which the station belongs; At the starting time, if there is no r-TWT TID data to be transmitted, it is necessary to determine whether the AP sets the corresponding silent interval for the r-TWT SP to which the site belongs; if so, perform the second operation in the silent interval.
  • the second field is used to indicate one or more silent intervals of the station, and the starting time of any silent interval is the same as the starting time of any r-TWT SP, then the station Record the AP and set the corresponding silent interval for the r-TWT SP to which the site belongs.
  • Step 702 can be replaced with: 703. If the first frame does not include the second field, the station sends data after competing for the channel.
  • the service identifier of the data is the first service identifier or the second service identifier.
  • the second field is used for Indicates one or more silent intervals for the above-mentioned sites.
  • the starting time of any silent interval is the same as the starting time of any r-TWT SP of the site.
  • Step 703 may refer to step 603 in Figure 6, and will not be described in detail here.
  • the method interaction process in Figure 7 also includes:
  • the station competes for the channel after obtaining the data of the second service identifier to be sent within the time indicated by any of the above silent intervals, or the station competes for the channel after the end of any of the above silent intervals.
  • the station After the station obtains the data of the second service identifier to be sent within the time indicated by any of the above silent intervals, it competes for the channel in order to transmit the data of the second service identifier faster. After any of the above silent intervals ends, the station competes for the channel; it can avoid the non-rTWT TID business from occupying the transmission opportunity of the r-TWT TID business in the r-TWT SP and ensure the priority service right of the r-TWT TID business.
  • the station competing for the channel after any of the above silent intervals ends can be understood as: the station does not compete for the channel during any of the above silent intervals, and starts to compete for the channel after any of the above silent intervals ends.
  • a possible way to prevent the station from competing for the channel during any of the above silent intervals is for the station to set NAV for all TIDs, and the length of the NAV is set to the length of any of the above silent intervals.
  • the duration of the silent interval is shorter than the duration of r-TWT SP. If after any of the above silent intervals ends, the r-TWT SP aligned with the start time of any of the silent intervals has not ended, the station competes for the channel within the r-TWT SP.
  • the station can also use other methods to achieve the purpose of not competing for the channel during the silent interval. This application is not limited to the implementation method of not competing for the channel during the silent interval.
  • the station's operation of not sending the data of the first service identifier during the silent interval can be regarded as remaining silent during the silent interval. While the site remains silent, if data from r-TWT TID arrives (i.e., it gets the data to be sent) The data of the second service identifier); one of the following methods can be performed: Method 1. Still remain silent, that is, competition for the channel is not allowed, and channel competition can be resumed until the end of the silence interval; Method 2. Cancel the silent state, that is, start competing for the channel .
  • the above-mentioned second frame also includes a third field, the above-mentioned third field is used to indicate that the above-mentioned station does not need to transmit any data of the above-mentioned second service identifier at the starting time of the defined target wake-up time service phase.
  • the above-mentioned second operation performed by the above-mentioned station during any of the above-mentioned silent intervals complies with the above-mentioned channel access rules.
  • the second operation performed by the above-mentioned station during any of the above-mentioned silent intervals is determined by the above-mentioned station based on the above-mentioned third field.
  • the above-mentioned not sending the data of the above-mentioned first service identifier includes the following two types: not competing for the channel during any of the above-mentioned silent intervals, and continuing to compete for the channel after the above-mentioned any of the silent intervals; There is no competition for the channel. After the data of the second service identifier arrives, competition for the channel begins. If the above-mentioned third field indicates that the above-mentioned station does not need to transmit any data with the above-mentioned second service identifier at the start time of the limited target wake-up time service phase, the above-mentioned station is prohibited from competing for the channel in the silent interval, and only after the end of the silent interval.
  • the competition can continue, and the above-mentioned second operation is: do not compete for the channel during any of the above-mentioned silent intervals, and continue to compete for the channel after the end of any of the above-mentioned silent intervals; or, if the above-mentioned third field indicates that the above-mentioned station serves at the limited target wake-up time
  • the above-mentioned station is prohibited from competing for the channel in the silent interval.
  • competition for the channel begins.
  • the above-mentioned second operation is: After obtaining the data of the second service identifier to be sent, competition for the channel begins. Before the station obtains the data of the second service identifier to be sent, it is prohibited to compete for the channel in the silent interval.
  • the third field indicates the channel access rules for the data of the first service identification of the site.
  • the channel access rules for the data of the first service identification of the site can be flexibly configured to reduce the need for the second service identification. Adverse effects caused by the transmission of data.
  • the first type of station performs the same operation when the first frame sent by the AP includes the second field and performs the same operation when the first frame does not include the second field.
  • the operation performed by the station when the first frame sent by the AP includes the second field is different from the operation performed when the first frame does not include the second field.
  • the first field in the first frame sent by the AP is used to indicate one or more r-TWT SPs of the site.
  • the first frame also includes a second field
  • the second field is used to indicate one or more silent intervals of the station, and the starting time of any silent interval is the same as the starting time of any r-TWT SP of the station
  • the The first frame is used to instruct the station to perform the above-mentioned second operation in any silent interval when the station does not need to transmit the data of the second service identifier at the starting time of any r-TWT SP.
  • the second field is used to indicate one or more silent intervals of the station, and the first frame is used to indicate that the station sends data after competing for the channel, and the service identifier of the data is non-rTWT TID or r-TWT TID.
  • the AP can cause the station to perform different operations to ensure the delay performance of the station.
  • the site performs the second operation during the silent interval.
  • the second operation is not to send the data of the first service identification; adverse effects on the transmission of the r-TWT TID data can be avoided.
  • the second operation is to change the channel competition parameters of the AC corresponding to the first service identifier of the station to a group with a lower channel access chance, it can reduce the adverse impact on the transmission of r-TWT TID data and at the same time provide There is an opportunity to transmit r-TWT TID data.
  • Embodiment 2 describes the channel access rules for sites that do not need to transmit data with r-TWT TID (belonging to the first category of sites mentioned above), and solves the problem of r-TWT scheduling STA at the starting time of r-TWT SP There is no question of whether r-TWT TID data is allowed to compete for channels when it needs to be transmitted.
  • FIG 8 is an interaction flow chart of another channel access method provided by this application. As shown in Figure 8, the interaction process of this method includes:
  • the access point sends the second frame.
  • the station receives the second frame.
  • the second frame may be a beacon frame, a probe response frame, or other frames.
  • the first field in the second frame is used to indicate one or more r-TWT SPs of the site.
  • the third field in the second frame indicates the channel access rules for data of the station's non-rTWT TID.
  • the channel access rules can be replaced by channel access methods, channel competition methods, etc.
  • the third field indicates the channel access rules for the station's non-rTWT TID data in the silent interval.
  • the third field may be located in the broadcast TWT parameter set in the second frame.
  • the third field may subsequently be called the access mode (Access Mode) subfield.
  • the third field may occupy 2 bits.
  • the access mode (Access Mode) subfield that is, the third field, is introduced in the broadcast TWT parameter set.
  • the first field and the third field may be located in the same broadcast TWT parameter set.
  • the access mode subfield can occupy 2 or more bits of any reserved bits in the broadcast TWT parameter set. Table 1 shows the value meaning of the access mode (Access Mode) subfield.
  • allowing non-rTWT TID to compete for the channel in the silent interval can be understood as: allowing the station to compete for the channel in the silent interval to send non-rTWT TID data, and after competing for the signal, send the non-rTWT TID data .
  • the AC corresponding to the non-rTWT TID of the station is allowed to compete for the channel in the silent interval, and after competing for the channel, send the data of the non-rTWT TID.
  • Prohibiting non-rTWT TID from competing for the channel in the silent interval can be understood as: prohibiting stations from competing for the channel in the silent interval to send data of non-rTWT TID.
  • the AC corresponding to the non-rTWT TID of the station is prohibited from competing for the channel during the silent interval.
  • allowing the non-rTWT TID to compete for the channel can be: allowing the AC corresponding to the non-rTWT TID of the station to compete for the channel in the silent interval; After the AC corresponding to non-rTWT TID competes for the channel, it must first transmit the data of r-TWT TID; after all the data of r-TWT TID is transmitted, the station is allowed to transmit the data of non-rTWT TID.
  • allowing non-rTWT TID to compete for the channel can be: before all the data of r-TWT TID is transmitted, prohibit the non-rTWT TID of the station from competing for the channel.
  • the AC corresponding to the rTWT TID competes for the channel in the silent interval; after all the data of the r-TWT TID is transmitted, the AC corresponding to the non-rTWT TID of the station is allowed to compete for the channel in the silent interval.
  • the third field is located in the broadcast TWT information subfield of the broadcast TWT parameter set in the second frame, and the third field may occupy 2 bits.
  • Figure 9 is a schematic structural diagram of another TWT element domain provided by an embodiment of the present application.
  • the broadcast TWT information subfield includes: Restricted TWT Traffic Information Subfield existence indication (Restricted TWT Traffic Info Present), access mode (Access Mode), broadcast TWT identification (Broadcast TWT ID), broadcast TWT duration (Broadcast TWT Persistence), the number below each subfield included in the broadcast TWT information indicates the number of bits occupied by the subfield.
  • the access mode ie, the third field
  • the access mode occupies two reserved bits in the broadcast TWT information subfield, which is compatible with the existing broadcast TWT parameter set without adding bits.
  • the meaning of each subfield or field in Figure 9 is the same as that in Figure 2A, and will not be described again here.
  • the third field is located in the traffic information control (Traffic Info Control) subfield of the broadcast TWT parameter set in the second frame, and the third field occupies 2 bits.
  • Figure 10 shows another TWT element field provided by the embodiment of the present application. Schematic. As shown in Figure 10, the service information control subfield includes: downlink TID bitmap valid (DL TID Bitmap Valid), uplink TID bitmap valid (UL TID Bitmap Valid), access mode (Access Mode), reserved (Reserved) , the number below each subfield included in the service information control subfield indicates the number of bits occupied by the subfield.
  • the access mode (ie, the third field) occupies 2 bits reserved in the service information control subfield, which is compatible with the existing broadcast TWT parameter set without adding bits.
  • the meaning of each subfield or field in Figure 10 is the same as that in Figure 2A, and will not be described again here.
  • the access mode may also occupy other reserved bits in the broadcast TWT parameter set, which is not limited in this application.
  • the second frame also includes a second field
  • the second field is used to indicate one or more silent intervals of the station, and the starting time of any silent interval is the same as the starting time of any r-TWT SP of the station.
  • the site performs a third action during any silent interval.
  • the above-mentioned third operation complies with the channel access rules of the non-rTWT TID data indicated by the above-mentioned third field.
  • the second frame also includes the second field, the third operation performed by the station in any of the above silent intervals is determined by the third field.
  • the third operation includes any of the following: after competing for the channel, send data whose service identifier belongs to r-TWT TID or non-rTWT TID; do not send data with the first service identifier; send data corresponding to the first service identifier
  • the access type competes for the channel
  • sending data may be: after the AC corresponding to any TID of the station competes for the channel, the AC sends data for this TID.
  • the implementation method of the station not sending the data of the first service identification can be referred to the implementation method of the station not sending the data of the first service identification in Embodiment 1, which will not be described in detail here.
  • the third operation is: after competing for the channel in any of the above silent intervals, send data, and the service identifier of the data belongs to r- TWT TID or non-rTWT TID.
  • the third operation is: do not send the first service identifier during any of the above silent intervals. data.
  • the third field in the second frame indicates that non-rTWT TID is prohibited from competing for the channel during the silent interval, but after all r-TWT TID data is transmitted, non-rTWT TID is allowed to compete for the channel.
  • the third operation is: in the first When the access type corresponding to the service identifier competes for the channel, the data of the second service identifier is sent before the data of the first service identifier is sent.
  • Step 802 can be replaced with: 803. If the second frame does not include the second field, the station sends data after competing for the channel.
  • the service identifier of the data belongs to r-TWT TID or non-rTWT TID.
  • the second field is used for Indicates one or more silent intervals for the above-mentioned sites.
  • the starting time of any silent interval is the same as the starting time of any r-TWT SP of the site.
  • Step 803 may refer to step 603 in Figure 6, and will not be described in detail here.
  • the third field in the second frame indicates the channel access rules for the non-rTWT TID data of the site, which can flexibly configure the channel access rules for the non-rTWT TID data of the site and reduce the need for Adverse effects caused by the transmission of r-TWT TID data.
  • the access point supports channel access rules for data of non-rTWT TID of the designated site.
  • the station performs channel access according to the channel access rules of the non-rTWT TID data specified by the access point; it solves whether r-TWT is allowed to schedule the non-rTWT TID of the STA during the silent interval after the r-TWT SP starts. Channel access issues.
  • Figure 11 is an interaction flow chart of another channel access method provided by this application. As shown in Figure 11, the interaction process of this method includes:
  • the access point sends the second frame.
  • the station receives the second frame.
  • the second frame may be a beacon frame, a probe response frame, or other frames.
  • the first field in the second frame is used to indicate one or more r-TWT SPs of the site.
  • the third field in the second frame indicates the channel access rule when the station does not have any r-TWT TID data to transmit at the start time of the r-TWT SP.
  • the third field may be located in the broadcast TWT parameter set in the second frame.
  • the third field may subsequently be called the access mode (Access Mode) subfield.
  • the third field may occupy 2 bits.
  • the access mode (Access Mode) subfield that is, the third field, is introduced in the broadcast TWT parameter set.
  • the first field and the third field may be located in the same broadcast TWT parameter set.
  • the access mode subfield can occupy 2 or more bits of any reserved bits in the broadcast TWT parameter set. Table 2 shows the value meaning of the access mode (Access Mode) subfield.
  • the third field in Embodiment 4 may be located in the broadcast TWT information subfield of the broadcast TWT parameter set in the second frame.
  • the access mode shown in Figure 9 is the third field in Embodiment 4.
  • the third field in Embodiment 4 may be located in the traffic information control (Traffic Info Control) subfield of the broadcast TWT parameter set in the second frame.
  • the access mode shown in Figure 10 is the third field in Embodiment 4.
  • the station does not need to transmit the data of the second service identifier at the starting time of any r-TWT SP, if the second frame also includes a second field, the second field is used to indicate one or more of the station.
  • Silent interval the starting time of any silent interval is the same as the starting time of any r-TWT SP, and the site performs the fourth operation in any silent interval.
  • the above fourth operation complies with the channel access rules when the station indicated by the above third field does not have any r-TWT TID data to be transmitted at the starting time of the r-TWT SP.
  • the station when the station does not need to transmit the data of the second service identifier at the starting time of any r-TWT SP, if the second frame also includes the second field, the station performs the fourth operation in any of the above silent intervals. It is determined by the third field.
  • the fourth operation includes any of the above: after competing for the channel, send data whose service identifier belongs to non-rTWT TID; do not send data (or do not compete for the channel); after obtaining the second service to be sent After the identified data, competition for the channel begins.
  • sending data may be: after the AC corresponding to any TID of the station competes for the channel, the AC sends data for this TID.
  • the station does not send data either because the station stops competing for the channel or because the station remains silent.
  • the site sets intra-BSS NAV for each AC, and the length of this NAV is set to the length of the silent interval.
  • the station is allowed to compete for the channel in the silent interval.
  • the fourth operation is: in any of the above silences After competing for the channel within the interval, data is sent, and the service identifier of the data belongs to non-rTWT TID.
  • the station is prohibited from competing for the channel during the silent interval, and the station can continue to compete after the silent interval ends.
  • the fourth operation is: do not send data (or do not compete for channels) within any of the above silent intervals.
  • the station is prohibited from competing for the channel during the silent interval.
  • the silent state is canceled and the competition for the channel is started.
  • the fourth operation is: after obtaining the data of the second service identifier to be sent, the competition for the channel is started.
  • Step 1102 can be replaced with: 1103. If the second frame does not include the second field, the station sends data after competing for the channel.
  • the service identifier of the data belongs to r-TWT TID or non-rTWT TID.
  • the second field is used for Indicates one or more silent intervals for the above-mentioned sites.
  • the starting time of any silent interval is the same as the starting time of any r-TWT SP of the site.
  • Step 1103 may refer to step 603 in Figure 6, and will not be described in detail here.
  • the third field in the second frame indicates the channel access rule when the station does not need to transmit any r-TWT TID data at the starting time of the r-TWT SP.
  • the station can be flexibly configured when the r-TWT SP starts.
  • the starting time of the TWT SP does not require any channel access rules for transmission of r-TWT TID data, and reduces the adverse impact on the transmission of r-TWT TID data.
  • the access point is supported to specify the channel access rules of stations that do not need to transmit data with r-TWT TID.
  • the station performs channel access according to the channel access rules specified by the access point; this solves the problem of whether the r-TWT scheduling STA is allowed to compete for the channel when there is no r-TWT TID data to be transmitted at the starting time of the r-TWT SP. .
  • the access point publishes (carries) the access mode, that is, the third field, through the second frame sent, so that the station performs channel access according to the channel access rules indicated by the access mode.
  • access mode There are two publishing forms for information with access mode (Access Mode) subfield:
  • Form 1 The AP broadcasts in frames such as beacon frames and detection response frames, which is the method in Embodiment 3 and Embodiment 4.
  • Form 2 The station and AP make a request when establishing the r-TWT agreement, and the AP decides to accept or not accept it in the response frame (response). For example, the station sends an r-TWT setup request frame to the AP.
  • the r-TWT setup request frame contains the access mode requested by the station.
  • the access mode indicates the non-rTWT TID data of the station.
  • the AP accepts access mode 1 requested by the station.
  • the station does not send the first frame during the silent interval indicated by the second field.
  • a business identification data For another example, the AP accepts the access mode 2 requested by the station.
  • the station when the first frame sent by the AP includes the first field and the second field, the station competes for the access type corresponding to the first service identifier. In the case of accessing the channel, before sending the data of the first service identifier, the data of the second service identifier is sent. For another example, the AP accepts access mode 3 requested by the site.
  • the site when the site does not need to transmit data with the second service identifier at the starting time of any r-TWT SP, if the first frame also includes the second field, the second field is used to indicate the silent interval of the station. The starting time of the silent interval is the same as the starting time of any r-TWT SP.
  • the station does not send the data of the first service identifier during the silent interval. .
  • the AP accepts access mode 4 requested by the site.
  • the site when the site does not need to transmit data with the second service identifier at the starting time of any r-TWT SP, if the first frame also includes the second field, the second field is used to indicate the silent interval of the site.
  • the starting time of the silent interval is the same as the starting time of any r-TWT SP.
  • the site changes the first service identifier of the site during the silent interval.
  • the channel competition parameters of the corresponding AC are the group with lower channel access opportunities.
  • FIG 12 is a schematic structural diagram of a communication device 1200 provided by an embodiment of the present application.
  • the communication device 1200 may correspond to the functions or steps implemented by the station in each of the above method embodiments, and may also correspond to the functions or steps implemented by the access point in each of the above method embodiments.
  • the communication device may include a processing module 1210 and a transceiver module 1220.
  • a storage unit may also be included, which may be used to store instructions (code or programs) and/or data.
  • the processing module 1210 and the transceiver module 1220 can be coupled with the storage unit.
  • the processing module 1210 can read the instructions (code or program) and/or data in the storage unit to implement the corresponding method.
  • the transceiver module 1220 may include a sending module and a receiving module.
  • the sending module can be a transmitter
  • the receiving module can be a receiver.
  • the entity corresponding to the transceiver module 1220 may be a transceiver or a communication interface.
  • the communication device 1200 can correspondingly implement the behaviors and functions of the site in the above method embodiments.
  • the communication device 1200 may be a site, or may be a component (such as a chip or a circuit) used in a site.
  • the transceiver module 1220 can, for example, be used to perform all receiving or sending operations performed by the station in the embodiments of FIG. 6, FIG. 7, FIG. 8, and FIG. 11, such as step 601 in the embodiment shown in FIG. 6, and the steps shown in FIG. 7. Step 701 in the embodiment shown in FIG. 8 , step 801 in the embodiment shown in FIG. 8 , step 1101 in the embodiment shown in FIG. 11 , and/or other processes used to support the techniques described herein.
  • the processing module 1210 is configured to perform all operations performed by the station in the embodiments of FIG. 6, FIG. 7, FIG. 8, and FIG. 11 except for the sending and receiving operations, such as steps 602 and 603 in the embodiment shown in FIG. 6. , Step 702, Step 703, and Step 704 in the embodiment shown in Figure 7, Step 802 and Step 803 in the embodiment shown in Figure 8, Step 1102 and Step 1103 in the embodiment shown in Figure 11.
  • the communication device 1200 can correspondingly implement the behaviors and functions of the access point in the above method embodiments.
  • the communication device 1200 may be an access point, or may be a component (such as a chip or circuit) used in the access point.
  • the transceiver module 1220 may, for example, be used to perform all receiving or sending operations performed by the access point in the embodiments of FIG. 6, FIG. 7, FIG. 8, and FIG. 11, such as step 601 in the embodiment shown in FIG. 6, FIG. Step 701 in the embodiment shown in FIG. 7, step 801 in the embodiment shown in FIG. 8, step 1101 in the embodiment shown in FIG. 11, and/or other processes used to support the technology described herein.
  • the processing module 1210 is configured to perform all operations performed by the access point except for the transceiver operation, such as the operation of generating a first frame or generating a second frame.
  • FIG. 13 is a schematic structural diagram of another communication device 130 provided by an embodiment of the present application.
  • the communication device in Figure 13 may be the above-mentioned station or the above-mentioned access point.
  • the communication device 130 includes at least one processor 1310 and a transceiver 1320 .
  • the processor 1310 and the transceiver 1320 may be used to perform functions or operations performed by the station, etc.
  • the transceiver 1320 performs, for example, all receiving or transmitting operations performed by the stations in the embodiments of FIGS. 6, 7, 8, and 11.
  • the processor 1310 is, for example, configured to perform all operations performed by the station in the embodiments of FIGS. 6, 7, 8, and 11 except for the sending and receiving operations.
  • the processor 1310 and the transceiver 1320 may be used to perform functions or operations performed by the access point, and the like.
  • the transceiver 1320 performs, for example, all receiving or transmitting operations performed by the access point in the embodiments of FIG. 6, FIG. 7, FIG. 8, and FIG. 11.
  • the processor 1310 is configured to perform all operations performed by the access point except for transceiver operations, such as operations of generating a first frame or generating a second frame.
  • Transceiver 1320 is used to communicate with other devices/devices over transmission media.
  • the processor 1310 uses the transceiver 1320 to send and receive data and/or signaling, and is used to implement the method in the above method embodiment.
  • the processor 1310 can implement the function of the processing module 1210, and the transceiver 1320 can implement the function of the transceiver module 1220.
  • the transceiver 1320 may include a radio frequency circuit and an antenna.
  • the radio frequency circuit is mainly used for conversion of baseband signals and radio frequency signals and processing of radio frequency signals.
  • Antennas are mainly used to send and receive radio frequency signals in the form of electromagnetic waves.
  • Input and output devices such as touch screens, display screens, keyboards, etc., are mainly used to receive data input by users and output data to users.
  • the communication device 130 may also include at least one memory 1330 for storing program instructions and/or data.
  • Memory 1330 and processor 1310 are coupled.
  • the coupling in the embodiment of this application is the indirect coupling between devices, units or modules.
  • a combination or communication connection, which may be electrical, mechanical or other forms, is used for information exchange between devices, units or modules.
  • the processor 1310 may cooperate with the memory 1330.
  • Processor 1310 may execute program instructions stored in memory 1330 . At least one of the at least one memory may be included in the processor.
  • the processor 1310 can read the software program in the memory 1330, interpret and execute the instructions of the software program, and process the data of the software program.
  • the processor 1310 performs baseband processing on the data to be sent, and then outputs the baseband signal to the radio frequency circuit.
  • the radio frequency circuit performs radio frequency processing on the baseband signal and then sends the radio frequency signal out in the form of electromagnetic waves through the antenna.
  • the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 1310.
  • the processor 1310 converts the baseband signal into data and performs processing on the data. deal with.
  • the above-mentioned radio frequency circuit and antenna can be arranged independently of the processor that performs baseband processing.
  • the radio frequency circuit and antenna can be arranged remotely and independently of the communication device.
  • connection medium between the above-mentioned transceiver 1320, processor 1310 and memory 1330 is not limited in the embodiment of the present application.
  • the memory 1330, the processor 1310 and the transceiver 1320 are connected through a bus 1340 in Figure 13.
  • the bus is represented by a thick line in Figure 13.
  • the connection between other components is only a schematic explanation. , is not limited.
  • the bus can be divided into address bus, data bus, control bus, etc. For ease of presentation, only one thick line is used in Figure 13, but it does not mean that there is only one bus or one type of bus.
  • the processor may be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, which may implement or Execute each method, step and logical block diagram disclosed in the embodiment of this application.
  • a general-purpose processor may be a microprocessor or any conventional processor, etc. The steps of the methods disclosed in conjunction with the embodiments of the present application can be directly implemented by a hardware processor for execution, or can be executed by a combination of hardware and software modules in the processor.
  • FIG. 14 is a schematic structural diagram of another communication device 140 provided by an embodiment of the present application.
  • the communication device shown in FIG. 14 includes a logic circuit 1401 and an interface 1402 .
  • the processing module 1210 in Figure 12 can be implemented by the logic circuit 1401, and the transceiver module 1220 in Figure 12 can be implemented by the interface 1402.
  • the logic circuit 1401 can be a chip, a processing circuit, an integrated circuit or a system on chip (SoC) chip, etc.
  • the interface 1402 can be a communication interface, an input-output interface, etc.
  • the logic circuit and the interface may also be coupled to each other.
  • the embodiments of this application do not limit the specific connection methods of the logic circuits and interfaces.
  • the logic circuit and interface may be used to perform the functions or operations performed by the above-mentioned site, etc.
  • the logic circuit and interface may be used to perform the functions or operations performed by the above-mentioned access point, etc.
  • This application also provides a computer-readable storage medium, which stores computer programs or instructions.
  • the computer program or instructions When the computer program or instructions are run on a computer, the computer is caused to execute the method of the above embodiments.
  • the computer program product includes instructions or computer programs. When the instructions or computer programs are run on a computer, the methods in the above embodiments are executed.
  • This application also provides a communication system, including the above-mentioned site and the above-mentioned access point.

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

Abstract

La présente demande divulgue un procédé d'accès à un canal et un dispositif associé. La présente demande est appliquée à un système de réseau local sans fil prenant en charge des protocoles Wi-Fi de prochaine génération IEEE802.11ax, tels que les protocoles 802.11be, Wi-Fi7 ou EHT, et les protocoles de prochaine génération 802.11be, Wi-Fi8 et d'autres protocoles de la série 802.11. Le procédé comprend les étapes suivantes : une station reçoit une première trame, un premier champ dans la première trame étant utilisé pour indiquer une ou plusieurs périodes de service de temps de réveil cible restreint de la station ; si la première trame comprend en outre un second champ, le second champ est utilisé pour indiquer un intervalle de tranquillité de la station, et la station réalise une première opération à l'intervalle de tranquillité, la première opération comprenant l'une quelconque des actions suivantes : le non-envoi de données d'un premier identifiant de trafic ; et, lorsqu'un type d'accès correspondant au premier identifiant de trafic est achevé pour un canal, l'envoi de données d'un second identifiant de trafic avant l'envoi des données du premier identifiant de trafic. La transmission de priorité des données du second identifiant de trafic peut être assurée.
PCT/CN2023/094980 2022-05-20 2023-05-18 Procédé d'accès à un canal et dispositif associé WO2023222072A1 (fr)

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CN202210552469.0A CN117134873A (zh) 2022-05-20 2022-05-20 信道接入方法和相关装置

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Citations (3)

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US20210168795A1 (en) * 2018-07-25 2021-06-03 Huawei Technologies Co., Ltd. Beacon frame transmission control method and related apparatus
US20220110053A1 (en) * 2020-10-01 2022-04-07 Nxp Usa, Inc. Frame transmission between wireless devices
WO2022075821A1 (fr) * 2020-10-08 2022-04-14 주식회사 윌러스표준기술연구소 Procédé et terminal de communication sans fil pour émettre/recevoir une trame dans un système de communication sans fil

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US20210168795A1 (en) * 2018-07-25 2021-06-03 Huawei Technologies Co., Ltd. Beacon frame transmission control method and related apparatus
US20220110053A1 (en) * 2020-10-01 2022-04-07 Nxp Usa, Inc. Frame transmission between wireless devices
WO2022075821A1 (fr) * 2020-10-08 2022-04-14 주식회사 윌러스표준기술연구소 Procédé et terminal de communication sans fil pour émettre/recevoir une trame dans un système de communication sans fil

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