WO2022143733A1 - 一种通信方法、装置及计算机可读存储介质 - Google Patents

一种通信方法、装置及计算机可读存储介质 Download PDF

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Publication number
WO2022143733A1
WO2022143733A1 PCT/CN2021/142348 CN2021142348W WO2022143733A1 WO 2022143733 A1 WO2022143733 A1 WO 2022143733A1 CN 2021142348 W CN2021142348 W CN 2021142348W WO 2022143733 A1 WO2022143733 A1 WO 2022143733A1
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Prior art keywords
service
frame
low
latency
twt
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PCT/CN2021/142348
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English (en)
French (fr)
Inventor
郭宇宸
李云波
淦明
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to MX2023007893A priority Critical patent/MX2023007893A/es
Priority to AU2021414155A priority patent/AU2021414155A1/en
Priority to EP21914465.6A priority patent/EP4258795A4/en
Priority to KR1020237025906A priority patent/KR20230124080A/ko
Priority to JP2023540457A priority patent/JP2024505361A/ja
Priority to CA3203875A priority patent/CA3203875A1/en
Publication of WO2022143733A1 publication Critical patent/WO2022143733A1/zh
Priority to US18/345,889 priority patent/US20230345537A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
    • H04W74/0816—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA] with collision avoidance
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H04W74/006—Transmission of channel access control information in the downlink, i.e. towards the terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
    • H04W52/0216—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave using a pre-established activity schedule, e.g. traffic indication frame
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0248—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal dependent on the time of the day, e.g. according to expected transmission activity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/535—Allocation or scheduling criteria for wireless resources based on resource usage policies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0866—Non-scheduled access, e.g. ALOHA using a dedicated channel for access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/12—WLAN [Wireless Local Area Networks]
    • 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 wireless communication technologies, and in particular, to a communication method, an apparatus, and a computer-readable storage medium.
  • Target wake time is a technology defined by WiFi6 for energy saving, which means that a station (station, STA) and an access point (access point, AP) can agree on a service period (service period, SP), keep active and communicate during the service time, so that it can sleep outside the service time to achieve the purpose of energy saving.
  • TWT can be divided into unicast (individual) TWT and broadcast (broadcast) TWT.
  • the restricted TWT SP (restricted TWT, R-TWT) is only used to serve low-latency services, and other non-low-latency services cannot communicate during this period.
  • the length of the R-TWT SP exceeds the time required for the actual communication of the current low-latency service, the R-TWT SP time after the current low-latency communication ends will be wasted, resulting in a waste of communication resources .
  • the embodiments of the present application provide a communication method, an apparatus, and a computer-readable storage medium, which can save communication resources in the case of R-TWT SP communication.
  • an embodiment of the present application provides a communication method, the method includes: if a first condition is met, the STA determines that the limited service time period ends, and the first condition includes any one or more of the following: receiving a first frame , the first frame is used to indicate the end of the limited service time period; the second frame is not received within the preset time period; the non-low-latency service communication frame in the cell is received, and the cell is the basic location where the STA is located.
  • Service set basic service set, BSS
  • the STA may end the limited service time period in advance if the first condition is satisfied. Since the STA can only communicate with low-latency services within the limited service time period, when any one or more of the first conditions are satisfied, the STA determines that the limited service time period ends, and the limited service period ends early. service time period. In this way, after the low-latency service is completed, the remaining idle limited service time can be avoided, thereby saving communication resources.
  • the limited service period is a period of time, and the AP and the STA are only used to serve low-latency services during this period.
  • the restricted service period may be called R-SP (restricted service period, R-SP), or may be called restricted TWT SP (restricted TWT SP). It is understandable that the limited service time period may also have other names, which are not limited in this embodiment of the present application.
  • the first frame is an extremely high throughput (extremely high throughput, EHT) action frame
  • EHT extremely high throughput
  • the EHT action field in the EHT action frame indicates the end of the limited service period.
  • the first frame may be an EHT action frame, a CF-end frame, or other frames.
  • the communication method further includes : The STA receives the third frame, and the third frame carries the TWT element; the preset time period is determined by the nominal minimum TWT wake-up duration field and the wake-up time unit field in the TWT element.
  • the preset time period may be acquired by the STA by receiving the third frame, or may be specified by a standard.
  • the communication method when the first condition includes receiving a frame of non-low-latency service communication in the local cell, before the STA determines that the limited service time period ends, the communication method It also includes: the STA receives the fourth frame, and the fourth frame carries a TWT element; the TWT element carries a threshold access category (access category, AC) of a non-low-latency service or a preset traffic identifier (traffic identifier) of a non-low-latency service , TID), a non-low-latency service is a service whose access level is lower than or equal to the threshold access level of a non-low-latency service, or a non-low-latency service is a service whose service is identified as a non-low-latency service.
  • the STA receives the fourth frame, and the fourth frame carries a TWT element; the TWT element carries a threshold access category (access category, AC) of a non-low-latency service or a preset traffic
  • the STA needs to obtain the threshold access level of the non-low-latency service or the pre-order of the non-low-latency service. If the service identifier is set, it can be determined whether the currently received service is a non-low-latency service, so as to determine whether the condition of receiving a frame of non-low-latency service communication in the cell is met, and if this condition is met , it can be determined that the limited service period ends.
  • the threshold access level of the non-low-latency service or the preset service identifier of the non-low-latency service is determined by the broadcast TWT recommendation field in the TWT element.
  • the threshold access level of the non-low-latency service or the preset service identifier of the non-low-latency service can be carried in the TWT element, and there is no need to set a new element specifically to carry the threshold of the non-low-latency service
  • the preset service identifier of the access level or non-low-latency service to save communication resources.
  • the communication method further includes: after the STA determines that the limited service time period ends, initiating a new channel access, or suspending before continuing the limited service time period channel access.
  • the STA when the STA determines that the limited service time period ends and ends the limited service time period in advance, it can continue to access the channel, which can minimize the waste of idle communication time.
  • the embodiments of the present application provide a communication method, which can ensure that the transmission of the low-latency service being transmitted is not interrupted in the case of R-TWT SP communication.
  • the communication method includes: the STA obtains a transmission opportunity (transmit opportunity, TXOP) before the limited service time period arrives; if a second condition is satisfied, the STA does not end the TXOP before the limited service time period arrives, and the second condition includes any of the following One or more: TXOP is used to transmit the data frame of the first service; the transmission time of the transmission service in the TXOP is less than or equal to the first threshold; the limited service time period is used for device to device (device to device, D2D) transmission time period.
  • the STA since the STA needs to end its own TXOP before the limited service time period arrives, but if any one or more of the exception conditions (second conditions) are satisfied, the STA does not need to be in the limited service period. End your transmission opportunity before the time period arrives. In this way, the transmission of the low-latency service being transmitted is not interrupted, thereby ensuring the latency performance of the low-latency service of the STA itself.
  • the STA does not end the TXOP before the limited service period arrives, which can be understood as the STA does not end the TXOP before the limited service period arrives. It can also be understood that the STA continues the current service transmission when the limited service time period arrives.
  • the The communication method further includes: the STA receives a fifth frame, where the fifth frame carries a TWT element, and the TWT element carries a first threshold.
  • the STA before satisfying the condition that the transmission time of the transmission service in the TXOP is less than or equal to the first threshold, the STA needs to obtain the information of the first threshold.
  • the information of the first threshold may be acquired by the STA by receiving the TWT element carried in the fifth frame, or may be specified by a standard.
  • the first service is a low-latency service
  • the communication method further includes: the STA receives a sixth frame, where the sixth frame carries a TWT element; the TWT element carries the threshold access level of the low-latency service or the preset service identifier of the low-latency service, the low-latency service
  • the delay service is a service whose access level is higher than or equal to the threshold access level of the low-latency service, or the low-latency service is a service whose service identifier is a preset service identifier of the low-latency service.
  • the first service can be a low-latency service.
  • the STA needs to obtain the threshold access level or low-latency service of the low-latency service.
  • the preset service identifier of the delay service can determine whether the currently received service is a low-latency service, so as to determine whether the condition that TXOP is used to transmit the data frame of the first service is met.
  • the STA does not need to end its transmission opportunity before the limited service time period arrives, so that the transmission of the low-latency service being transmitted is not interrupted, thereby ensuring the latency performance of the STA's own low-latency service.
  • the threshold access level of the low-latency service or the preset service identifier of the low-latency service is determined by the broadcast TWT recommendation field in the TWT element.
  • the threshold access level of the low-latency service or the preset service identifier of the low-latency service can be carried in the TWT element, and there is no need to set a new element to carry the threshold access level of the low-latency service. Or preset service identifiers of low-latency services to save communication resources.
  • the first service is an exceptional service
  • the communication method further includes: the STA receives a seventh frame, where the seventh frame carries a TWT element; the TWT element carries the threshold access level of the exception service or the preset service identifier of the exception service, and the exception service is the access level of the service The service that is higher than or equal to the threshold access level of the exceptional service, or the exceptional service is the service whose service identifier is the preset service identifier of the exceptional service.
  • the first service may be an exceptional service.
  • the STA needs to obtain the threshold access level of the exceptional service or the preset service of the exceptional service. identifier, it can be determined whether the currently received service is an exceptional service, so as to determine whether the condition that the TXOP is used to transmit the data frame of the first service is met.
  • the STA does not need to End your transmission opportunity before the time period arrives. In this way, the transmission of the service being transmitted is not interrupted, thereby ensuring the delay performance of the STA's own service.
  • the threshold access level of the exception service or the preset service identifier of the exception service is determined by the exception access level field in the TWT element.
  • the threshold access level of the exceptional service or the preset service identifier of the exceptional service can be carried in the TWT element, and there is no need to set a new element to specifically carry the threshold access level of the exceptional service or the preset service identifier of the exceptional service Business identification to save communication resources.
  • the communication method further includes: when the limited service time period arrives, when the transmission time of the transmission service in the TXOP is greater than the second threshold, the STA ends the TXOP.
  • the STA when the limited service time period comes, a possible implementation manner, the STA can only continue to transmit for a period of time, but cannot exceed the second threshold.
  • the second threshold may be a certain value specified by the standard, or may be sent by the AP to the STA, for example, carried in a TWT element and sent. In this way, the impact on the restricted service period can be reduced.
  • the second threshold may be equal to the first threshold, that is, when the current service transmission of the TXOP is completed, the STA ends the TXOP.
  • the communication method further includes: when the limited service time period arrives, the STA continues to transmit at most one physical layer protocol data unit (presentation protocol data unit, PPDU in the TXOP) ).
  • the STA continues to transmit at most one physical layer protocol data unit (presentation protocol data unit, PPDU in the TXOP) ).
  • the communication method further includes: the STA receives an eighth frame, where the eighth frame is used to indicate extending the limited service time period.
  • the STA may receive a frame for indicating the extension of the limited service time period. After the current transmission continues to be transmitted, the transmission in the limited service time period is started. Extending the duration of the limited service time period can reduce the impact on the service transmission in the limited service time period.
  • an embodiment of the present application provides a first communication apparatus, where the first communication apparatus can be applied to a STA, including:
  • a processing unit configured to determine that the limited service time period ends if a first condition is satisfied, where the first condition includes any one or more of the following:
  • the first frame is received, and the first frame is used to indicate the end of the limited service period
  • the second frame is not received within the preset time period
  • the cell After receiving the non-low-latency service communication frame in the cell, the cell is the BSS where the STA is located.
  • the first frame is an EHT action frame
  • an EHT action field in the EHT action frame indicates the end of the limited service time period.
  • the first communication apparatus further includes:
  • a transceiver unit configured to receive a third frame before the STA determines that the limited service period ends when the first condition includes that the second frame is not received within a preset time period, and the third frame carries a TWT element; the preset The time period is determined by the Nominal Minimum TWT Wakeup Duration and Wakeup Time Unit fields in the TWT element.
  • the above-mentioned transceiver unit may also be used to: when the first condition includes receiving a frame of non-low-latency service communication in the local cell, the STA determines that the service is limited Before the end of the time period, the fourth frame is received, and the fourth frame carries the TWT element;
  • the TWT element carries the threshold access level of the non-low-latency service or the preset service identifier of the non-low-latency service.
  • the non-low-latency service means that the access level of the service is lower than or equal to the threshold access of the non-low-latency service.
  • Class of service, or non-low-latency service is a service whose service identifier is a preset service identifier of non-low-latency service.
  • the threshold access level of the non-low-latency service or the preset service identifier of the non-low-latency service is determined by the broadcast TWT recommendation field in the TWT element.
  • the above-mentioned processing unit may also be used to: initiate a new channel access after determining that the limited service time period ends, or continue to perform before the limited service time period Suspended channel access.
  • an embodiment of the present application provides a second communication apparatus, where the second communication apparatus can be applied to a STA, including:
  • the processing unit is further configured to not end the TXOP before the arrival of the limited service time period if a second condition is met, and the second condition includes any one or more of the following:
  • TXOP is used to transmit the data frame of the first service
  • the transmission time of the transmission service in the TXOP is less than or equal to the first threshold
  • the restricted service period is the period for D2D transmission.
  • the second communication apparatus further includes:
  • a transceiver unit configured to receive a fifth frame, where the fifth frame carries a TWT element, when the second condition includes that the transmission time of the transmission service in the TXOP is less than or equal to the first threshold, and before ending the TXOP before the limited service time period arrives,
  • the first threshold is carried in the TWT element.
  • the first service is a low-latency service
  • the above-mentioned transceiver unit may also be used for:
  • the sixth frame is received before the TXOP ends before the limited service period arrives, and the sixth frame carries the TWT element; the TWT element carries the low-latency service
  • the threshold access level of the low-latency service or the preset service identifier of the low-latency service is a service whose access level is higher than or equal to the threshold access level of the low-latency service, or the low-latency service is a service The service identified as the preset service identifier of the low-latency service.
  • the threshold access level of the low-latency service or the preset service identifier of the low-latency service is determined by the broadcast TWT recommendation field in the TWT element.
  • the first service is an exceptional service;
  • the above-mentioned transceiver unit is also used for:
  • the seventh frame is not received before the TXOP ends before the limited service period arrives, and the seventh frame carries the TWT element; the TWT element carries the threshold of the exceptional service
  • the access level or the preset service identifier of the exceptional service is the service whose access level is higher than or equal to the threshold access level of the exceptional service, or the exceptional service is the service whose service identifier is the preset service identifier of the exceptional service business.
  • the threshold access level of the exceptional service or the preset service identifier of the exceptional service is determined by the exceptional access level field in the TWT element.
  • the above-mentioned processing unit may also be used for:
  • the TXOP is ended.
  • the above-mentioned processing unit may also be used for:
  • the above-mentioned transceiver unit may also be used for:
  • An eighth frame is received, and the eighth frame is used to indicate extending the limited service period.
  • an embodiment of the present application provides a first communication apparatus, where the first communication apparatus can be applied to a STA and includes a processor. Optionally, it also includes a transceiver for internal communication with the processor. The processor is configured to determine that the limited service time period ends if a first condition is met, and the first condition includes any one or more of the following:
  • the first frame is received, and the first frame is used to indicate the end of the limited service period
  • the second frame is not received within the preset time period
  • the cell After receiving the non-low-latency service communication frame in the cell, the cell is the BSS where the STA is located.
  • the first communication apparatus provided in the fifth aspect is configured to execute the first aspect or any possible implementation manner of the first aspect.
  • the first aspect or any possible implementation manner of the first aspect which will not be repeated here.
  • an embodiment of the present application provides a second communication apparatus, where the second communication apparatus can be applied to a STA and includes a processor. Optionally, it also includes a transceiver for internal communication with the processor. The processor is used to obtain TXOP before the limited service time period arrives;
  • the processing unit is further configured to not end the TXOP before the arrival of the limited service time period if a second condition is met, and the second condition includes any one or more of the following:
  • TXOP is used to transmit the data frame of the first service
  • the transmission time of the transmission service in the TXOP is less than or equal to the first threshold
  • the restricted service period is the period for D2D transmission.
  • the second communication apparatus provided in the sixth aspect is used to execute the second aspect or any possible implementation manner of the second aspect.
  • the second aspect or any possible implementation manner of the second aspect which will not be repeated here.
  • an embodiment of the present application provides a first communication apparatus, where the first communication apparatus can be applied to a STA and includes a processing circuit. Optionally, it also includes an output interface that communicates with the internal connection of the processing circuit.
  • the processing circuit is configured to determine that the limited service time period ends if a first condition is met, and the first condition includes any one or more of the following:
  • the first frame is received, and the first frame is used to indicate the end of the limited service period
  • the second frame is not received within the preset time period
  • the cell After receiving the non-low-latency service communication frame in the cell, the cell is the BSS where the STA is located.
  • the first communication apparatus provided in the seventh aspect is configured to execute the first aspect or any possible implementation manner of the first aspect.
  • the first aspect or any possible implementation manner of the first aspect which will not be repeated here.
  • an embodiment of the present application provides a second communication apparatus, where the second communication apparatus can be applied to a STA and includes a processing circuit. Optionally, it also includes an output interface that communicates with the internal connection of the processing circuit. The processing circuit is used to obtain the TXOP before the limited service time period arrives;
  • the processing unit is further configured to not end the TXOP before the arrival of the limited service time period if a second condition is met, and the second condition includes any one or more of the following:
  • TXOP is used to transmit the data frame of the first service
  • the transmission time of the transmission service in the TXOP is less than or equal to the first threshold
  • the restricted service period is the period for D2D transmission.
  • the second communication apparatus provided in the eighth aspect is configured to execute the second aspect or any possible implementation manner of the second aspect.
  • the second aspect or any possible implementation manner of the second aspect which will not be repeated here.
  • embodiments of the present application provide a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, and when the instructions are executed on a computer, the computer can execute the first aspect or any possibility of the first aspect. method of implementation.
  • an embodiment of the present application provides a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, and when the instructions are executed on a computer, the computer can execute the second aspect or any possibility of the second aspect. method of implementation.
  • the embodiments of the present application provide a computer program product including program instructions, which, when run on a computer, enables the computer to execute the first aspect or the method for any possible implementation manner of the first aspect.
  • embodiments of the present application provide a computer program product including program instructions, which, when run on a computer, enables the computer to execute the second aspect or the method for any possible implementation manner of the second aspect.
  • an embodiment of the present application provides a communication system, where the communication system includes the first communication device provided in the third aspect or the fifth aspect or the seventh aspect, and the fourth aspect or the sixth aspect. Or the second communication device provided by the eighth aspect.
  • FIG. 1 is a schematic diagram of an implementation manner of a TWT service phase in the prior art
  • FIG. 2 is a schematic diagram of a communication system provided by an embodiment of the present application.
  • FIG. 3 is a schematic flowchart of a communication method provided by an embodiment of the present application.
  • FIG. 4 is a schematic diagram of a frame structure provided by an embodiment of the present application.
  • 5A is a schematic diagram of a frame structure of a TWT element provided by an embodiment of the present application.
  • 5B is a schematic diagram of a frame structure of an EHT operation element provided by an embodiment of the present application.
  • 6A is a schematic diagram of a frame structure of another TWT element provided by an embodiment of the present application.
  • 6B is a schematic diagram of a frame structure of another EHT operation element provided by an embodiment of the present application.
  • FIG. 7 is a schematic diagram of a frame structure of another TWT element provided by an embodiment of the present application.
  • FIG. 8 is a schematic flowchart of another communication method provided by an embodiment of the present application.
  • FIG. 9A is a schematic diagram of a frame structure of another TWT element provided by an embodiment of the present application.
  • 9B is a schematic diagram of a frame structure of another EHT operation element provided by an embodiment of the present application.
  • FIG. 10 is a schematic diagram of another frame structure provided by an embodiment of the present application.
  • FIG. 11 is a schematic structural diagram of a first communication device provided by an embodiment of the present application.
  • FIG. 12 is a schematic structural diagram of a second communication apparatus provided by an embodiment of the present application.
  • TWT is a technology for energy saving defined by WiFi6.
  • the core idea is to set some periodic time periods, so that some devices only need to remain active in these TWT service periods (service periods, TWT SPs), and can sleep at other times, so as to achieve the purpose of energy saving.
  • TWT is divided into unicast TWT (individual TWT) and broadcast TWT (broadcast TWT).
  • unicast TWT each STA can establish a TWT protocol with the AP independently. Therefore, each STA can have its own active time period and sleep Time period:
  • broadcast TWT the AP can establish a common TWT protocol for a group of STAs, and multiple STAs work in the same active time period and sleep in other time periods.
  • Unicast TWT means that a TWT requesting site (requesting) sends a TWT request message to a TWT responding site (responding), requesting to set a wake-up time. After receiving the TWT request message, the responding site sends a TWT response message to the requesting site. After the interaction is successful, a TWT protocol is established between the requesting site and the responding site. After the TWT agreement is reached, both the requesting site and the responding site should remain active for a predetermined period of time in order to send and receive data. Outside the above time period, the station can sleep to save energy.
  • the STA sends the TWT protocol establishment request to the AP, that is, the STA is the requesting station, and the AP is the answering station.
  • the AP can also initiate the TWT protocol establishment request to the station.
  • the agreed active time period is called the TWT service phase.
  • FIG. 1 is a schematic diagram of an implementation manner of a TWT service phase in the prior art.
  • the STA sends a TWT request frame to the AP to request the TWT protocol, and the AP sends a TWT response frame to the STA.
  • Each TWT protocol may contain multiple TWT service phases of equal length that occur periodically.
  • broadcast TWT provides a "batch management" mechanism, where an AP can establish a series of periodically occurring TWT service phases with multiple STAs.
  • the above-mentioned multiple STAs need to remain in an active state so as to communicate with the AP.
  • An AP can carry information of one or more broadcast TWTs in a beacon frame (beacon frame).
  • Each broadcast TWT is jointly represented by a broadcast TWT identifier and the AP's media access control (MAC) address.
  • MAC media access control
  • the STA After receiving the beacon frame, if the STA is willing to join the broadcast TWT, it can send a broadcast TWT establishment request message to the AP to join the broadcast TWT.
  • a broadcast TWT identifier needs to be specified to request to join a specific broadcast TWT.
  • the parameter set for broadcast TWT also specifies the period in which TWT service phases occur and the duration of each TWT service phase.
  • the broadcast TWT parameters also include the life cycle of the broadcast TWT, which takes the beacon frame interval as a unit and represents the duration of the established broadcast TWT.
  • WLAN wireless local area network
  • AR augmented reality
  • VR virtual reality
  • WLAN needs to prioritize different services. For example, during the channel competition access process of WLAN, each device has four different access levels, and the transmission priority is divided through different competition parameters; each access level may include two service identifiers corresponding to two different access levels. business. Usually, data packets of low-latency services are generated periodically.
  • the restricted TWT service phase (restricted TWT SP, R-TWT-SP) is only used to serve low-latency services, and other services cannot communicate during this period.
  • the STA has started communication before the R-TWT-SP, it must end the current communication before the R-TWT-SP starts.
  • the technical defects of this mechanism include the following two aspects:
  • the length of the R-TWT-SP may exceed the length of time required for the actual communication of the low-latency service. However, according to the regulations, within the R-TWT-SP, no other communication is allowed, so the R-TWT-SP time after the end of the low-latency communication will be wasted.
  • the ongoing communication of the STA may also be the communication of the low-latency service.
  • the STA must end its transmission opportunity (transmit opportunity, TXOP) before the arrival of the R-TWT-SP. ), which will affect the delay performance of the STA's own low-latency service.
  • the embodiment of the present application provides a communication method, which can save communication resources in the case of R-TWT SP communication.
  • the communication method is specifically: if a first condition is met, the STA determines that the limited service time period ends, and the first condition includes any one or more of the following: receiving a first frame, the first frame is used to indicate the end of the limited service time period; the second frame is not received within the preset time period; the frame of non-low-latency service communication in the cell is received, and the cell is the BSS where the STA is located.
  • the STA can only communicate with low-latency services within the limited service time period, when any one or more of the first conditions are satisfied, the STA determines that the limited service time period ends, and the limited service period ends early. service time period. In this way, after the low-latency service is completed, the remaining idle limited service time can be avoided, thereby saving communication resources.
  • the embodiment of the present application provides a communication method, which can prevent the transmission of the low-latency service being transmitted from being interrupted, thereby ensuring the low latency of the STA itself.
  • Service latency performance The communication method is specifically as follows: the STA obtains the TXOP before the limited service time period arrives; if the second condition is satisfied, the STA does not end the TXOP before the limited service time period arrives, and the second condition includes any one or more of the following: TXOP The data frame used to transmit the first service; the transmission time of the transmission service in the TXOP is less than or equal to the first threshold; the limited service time period is the time period used for D2D transmission.
  • the STA Since the STA needs to end its own TXOP before the limited service time period arrives, but if any one or more of the exception conditions (the second condition) are satisfied, the STA does not need to end its own transmission before the limited service time period arrives Chance. In this way, the transmission of the low-latency service being transmitted is not interrupted, thereby ensuring the latency performance of the low-latency service of the STA itself.
  • WIFI wireless communication system global system of mobile communication (GSM) system, code division multiple access (code division multiple access, CDMA) ) system, wideband code division multiple access (WCDMA) system, general packet radio service (general packet radio service, GPRS) system, long term evolution (long term evolution, LTE) system, LTE frequency division duplex ( frequency division duplex (FDD) system, LTE time division duplex (TDD) system, universal mobile telecommunication system (UMTS), worldwide interoperability for microwave access (WiMAX) communication system , other future evolution systems, or other various wireless communication systems using wireless access technologies.
  • GSM global system of mobile communication
  • CDMA code division multiple access
  • WCDMA wideband code division multiple access
  • general packet radio service general packet radio service
  • LTE long term evolution
  • LTE frequency division duplex frequency division duplex
  • TDD time division duplex
  • UMTS universal mobile telecommunication system
  • WiMAX worldwide interoperability for microwave access
  • the communication system includes a network device and at least one terminal device located within the coverage of the network device.
  • a network device can provide communication coverage for a specific geographic area and communicate with terminal devices located within the coverage area.
  • the network device may be a base station (base transceiver station, BTS) in a GSM system or a code division multiple access (code division multiple access, CDMA) system, a base station (node B, NB) in a WCDMA system, or a base station (node B, NB) in the LTE system.
  • BTS base transceiver station
  • CDMA code division multiple access
  • the evolutional node B (evolutional node B, eNB or eNodeB) can be a wireless controller in a cloud radio access network (CRAN), or can be a relay station, access point AP, in-vehicle equipment, wearable equipment, network-side equipment in future networks, etc.
  • the terminal equipment can be mobile or fixed, and the terminal equipment can be a station STA, an access terminal, a user equipment (UE), a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device , user terminal, wireless communication device, user agent or user equipment, etc.
  • the STA in this embodiment of the present application is an STA that supports R-TWT-SP.
  • the STA can declare in advance whether it supports R-TWT-SP. If so, the STA must end its ongoing non-low-latency service communication before the R-TWT-SP starts; if not, the STA can ignore the R-TWT-SP.
  • the presence of TWT-SP Since the R-TWT-SP has a certain influence on the communication of the non-low-latency service of the STA that supports this feature, the R-TWT-SP in this embodiment of the present application can only serve the STA that supports the R-TWT-SP feature.
  • FIG. 2 is only an exemplary illustration, and does not constitute a limitation.
  • FIG. 3 is a schematic flowchart of a communication method provided by an embodiment of the present application.
  • the method is described below by taking a STA as an example, but it should be understood that the method is not limited to be performed by a STA, and can also be performed by an AP.
  • the STA described herein includes various apparatuses/devices on the STA side, and the AP includes various apparatuses/devices on the AP side.
  • the communication method includes but is not limited to the following steps.
  • the STA determines that the limited service time period ends.
  • the first condition includes any one or more of the following conditions:
  • Condition 1 the STA receives the first frame indicating the end of the restricted service period
  • Condition 2 The STA does not receive the second frame within the preset time period
  • the STA receives a frame of non-low-latency service communication within the cell.
  • the limited service time period is a period of time during which the AP and STA are only used to serve low-latency services.
  • the restricted service period may be called R-SP (restricted service period, R-SP), or may be called restricted TWT SP (restricted TWT SP). It is understandable that the limited service time period may also have other names, which are not limited in this embodiment of the present application.
  • the AP may send the parameter values of its own limited service time periods to other APs.
  • other APs set the parameter values of their own limited service time periods, it is necessary to ensure that the time periods of the limited service time periods among multiple APs do not overlap.
  • the first conditions are described in detail below, and it should be understood that the first conditions include but are not limited to the above three conditions.
  • the AP indicates that the limited service time period has ended, and sends the first frame for indicating the end of the limited service time period to the STA. After receiving the first frame sent by the AP, the STA determines that the limited service time period ends.
  • the AP indicating that the limited service time period has ended can be divided into two cases:
  • the first case when the low-latency service communication within the limited service time period has ended, the AP can send the first message indicating the end of the limited service time period to the STA within the limited service time period frame;
  • Case 2 If there is no low-latency service communication within the limited service time period, the AP can send a message to the STA to indicate the end of the limited service time period before the limited service time period arrives. first frame.
  • the first frame may be a type of EHT action frame.
  • FIG. 4 is a schematic diagram of a frame structure provided by an embodiment of the present application.
  • the EHT action frame may include a frame control (frame control) field, a duration (duration) field, a receiver address (RA) field, a sender address (TA) field, a basic service Set identification (BSS ID) field, sequence control (sequence control) field, high throughput control (HT control) field, frame body (frame body) field and frame check sequence (frame check sequence, FCS) field.
  • the frame body field includes a category subfield and an extremely high throughput action (EHT action) subfield.
  • the value of the extremely high throughput action (EHT action) subfield indicates that the EHT action frame is used to terminate the current limited service period. For example, when the value of the extremely high throughput action (EHT action) subfield is 0, it can be used to indicate that the current limited service period is terminated, or, when the value of the extremely high throughput action (EHT action) subfield is When the value is 1, it can be used to indicate that the current limited service time period is terminated.
  • the value of the extremely high throughput action (EHT action) subfield can also be a value such as 2 or 3, which is used to indicate termination of the current limited service time period. It can be understood that the value of the extremely high throughput action (EHT action) subfield is only an exemplary description, and does not constitute a limitation.
  • the first frame may be a contention free end (CF-End) frame.
  • CF-End contention free end
  • the first frame may be sent as a broadcast.
  • the STA After the STA enters the limited service time period, if the second frame is not received within the preset time period, it is determined that the limited service time period ends.
  • the preset time period may be sent by the AP to the STA, for example, carried in the TWT element or sent in the EHT operation element. Specifically, it may be the nominal minimum TWT wake-up duration of the TWT element.
  • the (nominal minimum TWT wake duration) field and the wake duration unit field are determined, or may be determined by the minimum restricted service period (minimum restricted service period duration) field in the EHT operation element.
  • the preset time period may also be specified by a standard. For example, the preset time period may be 1ms (milliseconds), 100us (microseconds), or the like. The preset time period is less than the restricted service time period.
  • the STA may receive the third frame that carries the TWT element or the EHT operation element sent by the AP.
  • the third frame may be a beacon frame or a TWT response frame.
  • FIG. 5A is a schematic diagram of a frame structure of a TWT element provided by an embodiment of the present application.
  • the TWT element may include an element ID (element ID) field, a length (length) field, a control (control) field, and a TWT parameter information (TWT parameter information) field.
  • the TWT parameter information (TWT parameter information) field may include a nominal minimum TWT wake duration (nominal minimum TWT wake duration) subfield.
  • the control field may include a wake duration unit subfield.
  • FIG. 5B is a schematic diagram of a frame structure of an EHT operation element provided by an embodiment of the present application.
  • the EHT operation element may include a minimum restricted service period (minimum restricted service period duration) field. It can be understood that this field is used to indicate the length of the preset time period, and may also have other names, and the name of this field is not limited.
  • the preset time period may be determined by the nominal minimum TWT wake duration (nominal minimum TWT wake duration) field and the wake duration unit (wake duration unit) field in the TWT element of Figure 5A:
  • the STA may determine the length of the restricted service period according to the nominal minimum TWT wake duration field and the wake duration unit field, for example, When the value of the wake duration unit field specified in the standard is 0, it means that the unit is 256us (microseconds), and when the value of the wakeup time unit (wake duration unit) field is 1, it means that the unit is 1024us (microseconds). ).
  • the duration of the preset time period is equal to the value represented by the nominal minimum TWT wake duration (nominal minimum TWT wake duration) field multiplied by the time unit represented by the wake-up time unit field, and then multiplied by the first coefficient.
  • the first coefficient may be a predefined value, eg, 0.1, 0.2, 0.5, 0.8, 1, etc.
  • the first coefficient may be sent by the AP to the STA; specifically, the first coefficient may be carried in the TWT element.
  • the preset time period can also be determined by the minimum restricted service period (minimum restricted service period duration) field in the EHT operation element as shown in Figure 5B:
  • the STA may determine the length of the preset time period according to the minimum restricted service period (minimum restricted service period duration) field.
  • the second frame can be a low-latency service communication frame in the cell, a frame sent by an AP in the cell, or any frame.
  • the local cell may be understood as the BSS where the STA is located.
  • the STA can obtain the value of the BSS color of the cell in advance.
  • the STA can determine whether the received frame is a frame in the cell according to the physical layer header or the MAC layer header of the received frame. Specifically, it can be judged by the BSS color field in the frame header of the physical layer. If the received BSS color field is the same as the value of the BSS color of this cell, it is determined that the received frame is a frame in this cell; it can also be determined by If the value of the receiving address or the sending address field is the same as the MAC address of the AP in this cell, it is determined that the received frame is a frame in this cell.
  • a low-latency service can be a service whose access level is higher than or equal to some specific access levels (threshold access levels for low-latency services), or a service whose service identifier is some specific identifier (low-latency service). the preset service identifier) of the service. It can be understood that the low-latency service may be a service whose priority corresponding to the access level of the service is higher than or equal to the priority corresponding to some specific access levels (threshold access level of the low-latency service), or It is a service whose service identifier is some specific identifiers (preset service identifiers of low-latency services).
  • the threshold access level of the low-latency service or the preset service identifier of the low-latency service may be sent by the AP to the STA, for example, carried in a TWT element or in an EHT operation element.
  • the service identifier may be a specific service identifier name or a specific value.
  • the STA may receive the sixth frame that carries the TWT element or the EHT operation element sent by the AP.
  • the sixth frame may be a beacon frame or a TWT response frame.
  • FIG. 6A is a schematic diagram of a frame structure of another TWT element provided by an embodiment of the present application.
  • the TWT element may include an element ID (element ID) field, a length (length) field, a control (control) field, and a TWT parameter information (TWT parameter information) field.
  • element ID element ID
  • length length
  • control control
  • TWT parameter information TWT parameter information
  • the TWT parameter information (TWT parameter information) field may include a request type (request type) subfield, a target wake time (target wake time) subfield, a nominal minimum TWT wake duration (nominal minimum TWT wake duration) subfield, TWT wake interval fractional part (TWT wake interval mantissa) subfield and broadcast TWT information (broadcast TWT Info) subfield.
  • the request type (request type) subfield may include a broadcast TWT recommendation (broadcast TWT recommendation) subfield.
  • FIG. 6B is a schematic diagram of a frame structure of another EHT operation element provided by an embodiment of the present application.
  • the EHT operation element may include a threshold access level or a preset service identification field.
  • the threshold access level or the preset service identifier field can be used to indicate the threshold access level of the low-latency service or the preset service identifier field of the low-latency service, and can also have other names, the name of the field. Not limited.
  • the threshold access level of the low-latency service or the preset service identifier of the low-latency service can be determined by the broadcast TWT recommendation (broadcast TWT recommendation) field in the TWT element as shown in FIG. 6A or by the EHT operation as shown in FIG. 6B .
  • the threshold access level or preset service identification field in the element is determined. The following specifically introduces the implementation manner in which the threshold access level of the low-latency service or the preset service identifier of the low-latency service can be determined by the broadcast TWT recommendation (broadcast TWT recommendation) field in the TWT element as shown in FIG. 6A :
  • the broadcast TWT recommendation (broadcast TWT recommendation) field may indicate the threshold access level of the low-latency service or the preset service identifier of the low-latency service by means of an index.
  • the value of the broadcast TWT recommendation (broadcast TWT recommendation) field may represent an index value, and the index value may correspond to the threshold access level of the low-latency service or the preset service identifier of the low-latency service.
  • the broadcast TWT recommendation (broadcast TWT recommendation) field indicates the threshold access level of the low-latency service or the preset service identifier of the low-latency service by means of an index value.
  • the threshold access level of the low-latency service corresponding to the first value is AC_VO; when the broadcast TWT recommendation (broadcast TWT recommendation) field When the value of is the second value, the threshold access levels of the low-latency service corresponding to the second value are AC_VO and AC_VI. Understandably, the correspondence between the value of the broadcast TWT recommendation field and the threshold access level of the low-latency service shown in Table 1 is only an example. In practical applications, the broadcast TWT recommendation can be determined according to the actual application scenario. The correspondence between the value of the TWT recommendation (broadcast TWT recommendation) field and the threshold access level of the low-latency service. This embodiment of the present application does not limit this.
  • the threshold access level of the low-latency service corresponding to the index value may be determined according to the index value. Then, according to the access level of the currently received service, it is determined whether the service is a low-latency service. For example, if the value of the broadcast TWT recommendation field is the first value, the STA can determine whether the access level of the currently received service is AC_VO, and if so, determine that the currently received service is a low-latency service.
  • the value of the broadcast TWT recommendation (broadcast TWT recommendation) field is the second value, and the STA can determine whether the access level of the currently received service is AC_VO or AC_VI, and if so, determine that the currently received service is a low-latency service. When the STA determines that the currently received service is not the low-latency service of the cell, the condition 2) is satisfied, and the STA determines that the limited service time period ends.
  • the preset service identifiers of the low-latency service corresponding to the first value are 6 and 7;
  • the preset service identifiers of the low-latency service corresponding to the second value are 4, 5, 6, and 7;
  • the value of the broadcast TWT recommendation (broadcast TWT recommendation) field is the third
  • the preset service identifier of the low-latency service corresponding to the third value is a value between the third value (eg, 3) and 7.
  • the correspondence between the value of the broadcast TWT recommendation field shown in Table 2 and the preset service identifier of the low-latency service is only an example. In practical applications, the broadcast TWT recommendation can be determined according to the actual application scenario.
  • the correspondence between the value of the TWT recommendation (broadcast TWT recommendation) field and the preset service identifier of the low-latency service does not limit this.
  • the preset service identifier of the low-latency service corresponding to the index value may be determined according to the index value. Then, according to the service identifier of the currently received service, it is determined whether the service is a low-latency service.
  • the value of the broadcast TWT recommendation (broadcast TWT recommendation) field is the first value, and the STA can determine whether the service ID of the currently received service is 6 or 7, and if so, determine that the currently received service is a low-latency service
  • the value of the broadcast TWT recommendation (broadcast TWT recommendation) field is the second value, and the STA can determine whether the service identifier of the currently received service is one of 4, 5, 6, and 7, and if so, then determine that the current The received service is a low-latency service;
  • the value of the broadcast TWT recommendation field is the third value, and the STA can determine whether the service identifier of the currently received service is the third value (such as 3) To one of 7, if yes, it is determined that the currently received service is a low-latency service.
  • the condition 2) is satisfied, and the STA determines that the limited service time period ends.
  • the broadcast TWT recommendation (broadcast TWT recommendation) field may directly indicate the threshold access level of the low-latency service or the preset service identifier of the low-latency service.
  • the information in the broadcast TWT recommendation field is AC_VO
  • AC_VO the threshold access level of the low-latency service
  • the information in the broadcast TWT recommendation field is AC_VO and AC_VI
  • the information in the broadcast TWT recommendation field is 6 and 7, it can indicate that 6 and 7 are preset service identifiers for low-latency services
  • the information of the broadcast TWT recommendation (broadcast TWT recommendation) field is 4, 5, 6 and 7, it can indicate that 4, 5, 6 and 7 are the preset service identifiers of the low-latency service
  • the broadcast TWT recommendation (broadcast TWT When the information in the recommendation) field is a third
  • the STA can information to determine the threshold access level of the low-latency service or the preset service identifier of the low-latency service. According to the access level or service identifier of the currently received service and the information in the broadcast TWT recommendation (broadcast TWT recommendation) field, it is determined whether the currently received service is a low-latency service. When the STA determines that the currently received service is not the low-latency service of the cell, the condition 2) is satisfied, and the STA determines that the limited service time period ends.
  • the threshold access level of the low-latency service or the preset service identifier of the low-latency service can also be determined by the threshold access level or preset service identifier field in the EHT operation element as shown in FIG. 6B .
  • the threshold access level or preset service identifier field in the EHT operation element as shown in FIG. 6B .
  • the broadcast TWT recommendation broadcast TWT recommendation
  • a low-latency field may also be added to the TWT element carried in the sixth frame, and the threshold access level of the low-latency service or the preset service identifier of the low-latency service is determined by the low-latency field.
  • FIG. 7 is a schematic diagram of a frame structure of another TWT element provided by an embodiment of the present application.
  • the TWT element may include an element ID (element ID) field, a length (length) field, a control (control) field, and a TWT parameter information (TWT parameter information) field.
  • the control (control) field may include a low latency (low latency) subfield.
  • the threshold access level of the low-latency service or the preset service identifier of the low-latency service can be determined by the TWT element shown in Figure 7:
  • the low latency (low latency) field may indicate the threshold access level of the low-latency service or the preset service identifier of the low-latency service by means of an index.
  • the value of the low latency (low latency) field may represent an index value, and the index value may correspond to a threshold access level of the low-latency service or a preset service identifier of the low-latency service.
  • the low latency (low latency) field indicates the threshold access level of the low latency service or the preset service identifier of the low latency service by means of an index value.
  • the threshold access level of the low latency service corresponding to the first value is AC_VO;
  • the threshold access levels of the low-latency service corresponding to the second value are AC_VO and AC_VI. It is understandable that the corresponding relationship between the value of the low latency field and the threshold access level of the low latency service shown in Table 3 is only an example. In practical applications, the low latency can be determined according to the actual application scenario. The corresponding relationship between the value of the low latency field and the threshold access level of the low latency service. This embodiment of the present application does not limit this.
  • the threshold access level of the low-latency service corresponding to the index value may be determined according to the index value. Then, according to the access level of the currently received service, it is determined whether the service is a low-latency service. For example, if the value of the low latency field is the first value, the STA can determine whether the access level of the currently received service is AC_VO, and if so, determine that the currently received service is a low latency service.
  • the value of the low latency (low latency) field is the second value, and the STA can determine whether the access level of the currently received service is AC_VO or AC_VI, and if so, determine that the currently received service is a low latency service.
  • the condition 2) is satisfied, and the STA determines that the limited service time period ends.
  • the corresponding relationship between the value of the low latency (low latency) field and the preset service identifier of the low latency service may be as shown in Table 4 below.
  • the preset service identifiers of the low latency service corresponding to the first value are 6 and 7;
  • the preset service identifiers of the low-latency service corresponding to the second value are 4, 5, 6, and 7. It is understandable that the corresponding relationship between the value of the low latency field and the preset service identifier of the low latency service shown in Table 4 is only an example. In practical applications, the low latency can be determined according to the actual application scenario. The corresponding relationship between the value of the low latency field and the preset service identifier of the low latency service. This embodiment of the present application does not limit this.
  • the preset service identifier of the low-latency service corresponding to the index value may be determined according to the index value. Then, according to the service identifier of the currently received service, it is determined whether the service is a low-latency service.
  • the STA can determine whether the service identifier of the currently received service is 6 or 7, and if so, determine that the currently received service is a low latency service;
  • the value of the low latency (low latency) field is the second value, and the STA can determine whether the service identifier of the currently received service is one of 4, 5, 6, and 7.
  • the service is low-latency service.
  • the low latency (low latency) field may directly indicate the threshold access level of the low-latency service or the preset service identifier of the low-latency service.
  • the information in the low latency (low latency) field is AC_VO
  • AC_VO the threshold access level of the low-latency service
  • the information in the low latency (low latency) field is AC_VO and AC_VI
  • it can indicate AC_VO and AC_VI are the threshold access levels for low-latency services
  • the information in the low-latency (low latency) field is 6 and 7, it can indicate that 6 and 7 are preset service identifiers for low-latency services
  • the information in the low latency field is 4, 5, 6 and 7, it may indicate that 4, 5, 6 and 7 are preset service identifiers of the low latency service.
  • the STA can The information in this field determines the threshold access level of the low-latency service or the preset service identifier of the low-latency service. Whether the currently received service is a low-latency service is determined by the access level or service identifier of the currently received service and the information in the low latency (low latency) field. When the STA determines that the currently received service is not the low-latency service of the cell, the condition 2) is satisfied, and the STA determines that the limited service time period ends.
  • a special value of the low-latency field may indicate that the established TWT is not used for low-latency communication, but is used for traditional TWT communication.
  • Other values are used for low-latency communication and indicate the access level or service identifier corresponding to low-latency communication. The values are shown in Table 5 below.
  • the STA After the STA enters the limited service time period, if it receives a frame of non-low-latency service (ie, ordinary service) communication in the cell, it is determined that the limited service time period ends.
  • a frame of non-low-latency service ie, ordinary service
  • the local cell may be understood as the BSS where the STA is located.
  • the STA can obtain the value of the BSS color of the cell in advance.
  • the STA can determine whether the received frame is a frame in the cell according to the physical layer header or the MAC layer header of the received frame. Specifically, it can be judged by the BSS color field in the frame header of the physical layer. If the received BSS color field is the same as the value of the BSS color of this cell, it is determined that the received frame is a frame in this cell; it can also be determined by If the value of the receiving address or the sending address field is the same as the MAC address of the AP in this cell, it is determined that the received frame is a frame in this cell.
  • Non-low-latency services can be services whose access levels are lower than some specific access levels (threshold access levels for non-low-latency services), or services whose service identifiers are some specific identifiers (non-low-latency services).
  • the preset service identifier of the service) of the service It can be understood that a non-low-latency service may be a service whose priority corresponding to the access level of the service is lower than the priority corresponding to some specific access levels (threshold access level of non-low-latency service), or It is a service whose service identifier is some specific identifiers (preset service identifiers of non-low-latency services).
  • the threshold access level of the non-low-latency service or the preset service identifier of the non-low-latency service may be sent by the AP to the STA, for example, carried in a TWT element or an EHT operation element and sent.
  • the threshold access level of the non-low-latency service or the preset service identifier of the non-low-latency service may also be specified by the standard.
  • the service identifier may be a specific service identifier name or a specific value.
  • the STA may receive the fourth frame that carries the TWT element or the EHT operation element sent by the AP.
  • the fourth frame may be a beacon frame or a TWT response frame.
  • a schematic diagram of a frame structure of a TWT element may be shown in FIG. 6A
  • a schematic diagram of a frame structure of an EHT operation element may be shown in FIG. 6B .
  • the broadcast TWT recommendation (broadcast TWT recommendation) field in the TWT element or the threshold access level or the preset service identification field in the EHT operation element may be used to indicate the threshold access level or non-low delay service of non-low delay services.
  • the preset service identifier of the service For the specific implementation method, refer to the broadcast TWT recommendation (broadcast TWT recommendation) field in the TWT element in the above condition 2) or the threshold access level in the EHT operation element or the preset service identifier field indicates low when The implementation manner of the threshold access level of the delay service or the preset service identifier of the non-low delay service is not repeated here in order to avoid repetition.
  • the STA can determine The current service is a non-low-latency service.
  • the STA determines that the current service is a non-low-latency service of the cell, that is, the condition 3) is satisfied, and it is determined that the limited service time period ends.
  • the STA may receive the sixth frame. Since the TWT element or EHT operation element carried in the sixth frame indicates the threshold access level of the low-latency service or the preset service identifier of the low-latency service, the STA receives the current service. When the access level or service identifier of the current service is the threshold access level of the low-latency service or the preset service identifier of the low-latency service, if not, the STA may determine that the current service is a non-low-latency service . When the STA determines that the current service is a non-low-latency service of the cell, that is, the condition 3) is satisfied, and it is determined that the limited service time period ends.
  • the AP needs to send the third frame and the fourth frame to the STA.
  • the third frame and the fourth frame can be the same frame, and the TWT element or EHT operation element carried by the AP also indicates the preset time period. and the threshold access level of the non-low-latency service or the preset service identifier of the low-latency service.
  • the AP needs to send the third frame and the sixth frame to the STA.
  • the third frame and the sixth frame may be the same frame, and the TWT element or EHT operation element carried by the AP also indicates the preset time period and the threshold connection of the low-latency service.
  • the preset service identifier of the incoming class or low-latency service is a frame and the sixth frame.
  • the AP needs to send the fourth frame to the STA, then the above-mentioned third frame and the fourth frame are different frames, and the TWT element or EHT operation element carried in the third frame is used to indicate the preset Time period, the TWT element or EHT operation element carried in the fourth frame is used to indicate the threshold access level of the non-low-latency service or the preset service identifier of the low-latency service.
  • the AP needs to send the sixth frame to the STA, the third frame and the sixth frame are different frames, the TWT element or EHT operation element carried in the third frame is used to indicate a preset time period, and the TWT element carried in the sixth frame or The EHT operation element is used to indicate the threshold access level of the low-latency service or the preset service identifier of the low-latency service.
  • Channel access may be a channel access process based on carrier sense multiple access/collision avoidance (CSMA/CA) or enhanced distributed channel access (EDCA).
  • CSMA/CA carrier sense multiple access/collision avoidance
  • EDCA enhanced distributed channel access
  • the STA when the STA receives the trigger frame sent by the AP and sends the data frame, if the STA subsequently uses the EDCA access mode to access the channel, it needs to use multi-user (multi-user, The MU EDCA parameter set performs channel competition, because the STA has already accessed the channel by responding to the trigger frame, and it is necessary to adopt more conservative parameters (ie, the MU EDCA parameter set) in the subsequent channel access.
  • the data frame sent by the STA receiving the trigger frame in the limited service time period is the data frame of the low-latency service, the channel access opportunity of the low-latency service should not be affected.
  • the STA When the STA receives the trigger frame sent by the AP in the limited service time period, and after sending the data frame, if the STA needs to use the EDCA access mode for channel access later, it may not use the MU EDCA parameter set, but use the original EDCA parameter set for channel access.
  • the STA since the STA must end its ongoing non-low-latency service communication before the limited service time period begins, if the STA completes random backoff before the limited service time period starts, but does not If the transmission is performed before the time period, after the limited service time period ends, if the station needs to use the EDCA access mode for channel access, the EDCA parameters used are the same as the random values before the limited service time period starts. The same EDCA parameters are used in backoff.
  • FIG. 8 is a schematic flowchart of another communication method provided by an embodiment of the present application.
  • the method is described below by taking a STA as an example, but it should be understood that the method is not limited to be performed by a STA, and can also be performed by an AP.
  • the STA described herein includes various devices/devices on the STA side, and the AP includes various devices/devices on the AP side.
  • the communication method includes but is not limited to the following steps.
  • the STA acquires the TXOP before the limited service time period arrives.
  • the STA can obtain the TXOP before the limited service time period arrives, and the services transmitted by the TXOP can include low-latency services, non-low-latency services, and exceptional services.
  • the second condition includes any one or more of the following exception conditions:
  • TXOP is used to transmit the data frame of the first service
  • Exceptional condition 2 the transmission time of the transmission service in the TXOP is less than or equal to the first threshold
  • the restricted service period is the period for D2D transmission.
  • the limited service time period is a period of time during which the AP and STA are only used to serve low-latency services.
  • the restricted service period may be called R-SP (restricted service period, R-SP), or may be called restricted TWT SP (restricted TWT SP). It is understandable that the limited service time period may also have other names, which are not limited in this embodiment of the present application.
  • the STA does not end the TXOP before the limited service time period arrives. It can be understood that the STA does not need to end its TXOP before the limited service time period arrives, or the STA does not end the TXOP before the limited service time period arrives, or , the STA continues the current service transmission when the limited service time period arrives.
  • the AP may send the parameter values of its own limited service time periods to other APs.
  • other APs set the parameter values of their own limited service time periods, it is necessary to ensure that the time periods of the limited service time periods among multiple APs do not overlap.
  • the second conditions are described in detail below, and it should be understood that the second conditions include but are not limited to the above three exception conditions.
  • the STA does not end the TXOP before the arrival of the limited service period.
  • the first service may be a low-latency service or an exceptional service.
  • the first service is a low-latency service, specifically:
  • a low-latency service can be a service whose access level is higher than or equal to some specific access levels (threshold access level of low-latency preset service identifier). It can be understood that the low-latency service may be a service whose priority corresponding to the access level of the service is higher than or equal to the priority corresponding to some specific access levels (threshold access level of the low-latency service), or It is a service whose service identifier is some specific identifiers (preset service identifiers of low-latency services).
  • the threshold access level of the low-latency service or the preset service identifier of the low-latency service may be sent by the AP to the STA, for example, carried in a TWT element or an EHT operation element and sent.
  • the service identifier may be a specific service identifier name or a specific value.
  • the STA may receive the sixth frame that carries the TWT element or the EHT operation element sent by the AP.
  • the sixth frame may be a beacon frame or a TWT response frame.
  • the threshold access level of the low-latency service or the preset service identifier of the low-latency service can be determined by the broadcast TWT recommendation (broadcast TWT recommendation) field in the TWT element as shown in FIG. 6A or the EHT operation element as shown in FIG. 6B .
  • the threshold access level or preset service identifier field in the low latency) field is determined.
  • the exceptional service may be the same service as the low-latency service, or may be a service different from the low-latency service. If the exceptional service is a service different from the low-latency service, the exceptional service may be a service whose access level is higher than or equal to the threshold access level of the exceptional service, or a service whose service identifier is the preset service identifier of the exceptional service . It can be understood that the exceptional service may be a service whose priority corresponding to the access level of the service is higher than or equal to the threshold access level of the exceptional service, or may be a service whose service identifier is a preset service identifier of the exceptional service.
  • the threshold access level of the exceptional service or the preset service identifier of the exceptional service may be sent by the AP to the STA, for example, carried in a TWT element or an EHT operation element and sent.
  • the threshold access level of the exceptional service or the preset service identifier of the exceptional service may also be specified by the standard.
  • the service identifier may be a specific service identifier name or a specific value.
  • the STA may receive the seventh frame that carries the TWT element or the EHT operation element sent by the AP.
  • the seventh frame may be a beacon frame or a TWT response frame.
  • FIG. 9A is a schematic diagram of a frame structure of another TWT element provided by an embodiment of the present application.
  • the TWT element may include an element ID (element ID) field, a length (length) field, a control (control) field, and a TWT parameter information (TWT parameter information) field.
  • element ID element ID
  • length length
  • control control
  • TWT parameter information TWT parameter information
  • the TWT parameter information (TWT parameter information) field may include a request type (request type) subfield, a target wake time (target wake time) subfield, a nominal minimum TWT wake duration (nominal minimum TWT wake duration) subfield, TWT wake interval fractional part (TWT wake interval mantissa) subfield and broadcast TWT information (broadcast TWT Info) subfield.
  • the broadcast TWT information (broadcast TWT Info) subfield may include an exception access level (or exception service identifier) (exception AC (or exception TID)) subfield.
  • FIG. 9B is a schematic diagram of a frame structure of another EHT operation element provided by an embodiment of the present application.
  • the EHT operation element may include an exception access class (or exception service identifier) (exception AC (or exception TID)) field.
  • exception access class or exception service identifier
  • exception AC or exception TID
  • the threshold access level of the exceptional service or the preset service identifier of the exceptional service can be determined by the exception access level (or exceptional service identifier) in the TWT element shown in FIG. 9A or the EHT operation element shown in FIG. 9B (exception AC(or exception TID)) field is determined.
  • the STA acquires the TXOP before the limited service time period arrives, and the transmission time of the transmission service within the TXOP is less than or equal to the first threshold, the TA does not end the TXOP before the limited service time period arrives.
  • the first threshold may be sent by the AP to the STA, for example, carried in a TWT element or an EHT operation element.
  • the first threshold value may also be standard-defined.
  • the first threshold may be 1ms (milliseconds), 100us (microseconds), or the like.
  • the STA may receive the fifth frame sent by the AP that carries the TWT element or the EHT operation element.
  • the fifth frame may be a beacon frame or a TWT response frame.
  • a certain field in the TWT element or the EHT operation element may indicate the first threshold.
  • the limited service time period can be the time period for low-latency service communication between the serving AP and the STA, or the time period for the service communication between D2D.
  • D2D is the service transmission between STA and STA.
  • D2D can also be called It is a peer-to-peer network.
  • the limited service time period is the time period for D2D transmission, that is, the exception condition 3) is satisfied, the STA does not end the TXOP before the limited service time period comes.
  • the STA may perform any one or more of the following actions:
  • the STA may ignore the existence of the restricted service time period. It can be understood that when the limited service time period arrives, the STA may not terminate the transmission of its current TXOP until the transmission of the TXOP is completed. Optionally, the transmission of the TXOP may end after the start time of the restricted service period;
  • Behavior 2 When the limited service time period arrives, if the transmission time of the service transmitted in the TXOP is greater than the second threshold, the STA ends the TXOP. Specifically, when the limited service time period comes, the STA can only continue to transmit for a period of time, but cannot exceed the second threshold.
  • the second threshold may be a certain value specified by the standard, or may be sent by the AP to the STA, for example, carried in a TWT element or an EHT operation element and sent.
  • the second threshold may be equal to the first threshold, that is, when the current service transmission of the TXOP is completed, the STA ends the TXOP.
  • FIG. 10 is a schematic diagram of another frame structure provided by an embodiment of the present application. As shown in FIG.
  • the EHT action frame may include a frame control (frame control) field, a duration (duration) field, a receiver address (RA) field, a sender address (TA) field, a basic service Set identification (BSS ID) field, sequence control (sequence control) field, high throughput control (HT control) field, frame body (frame body) field and frame check sequence (frame check sequence, FCS) field.
  • the frame body field includes a category subfield, an extremely high throughput action (EHT action) subfield, and an extra restricted SP duration subfield.
  • the value of the extra restricted SP duration subfield may be used to indicate the extended duration of the restricted service period. For example, when the value of the extra restricted service phase duration (extra restricted SP duration) subfield is 10, it can be used to indicate that the restricted service time period is extended by 10ms (milliseconds).
  • the communication device may be divided into functional modules according to the foregoing method examples.
  • each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module.
  • the above-mentioned integrated modules can be implemented in the form of hardware, and can also be implemented in the form of software function modules. It should be noted that, the division of modules in the embodiments of the present application is schematic, and is only a logical function division, and there may be other division manners in actual implementation.
  • FIG. 11 is a schematic structural diagram of a first communication apparatus provided by an embodiment of the present application.
  • the first communication apparatus may be a STA, or may be a module (eg, a chip) in the STA.
  • the first communication device 1100 includes at least: a processing unit 1101 and a transceiver unit 1102; wherein:
  • the processing unit 1101 is configured to determine that the limited service time period ends if a first condition is satisfied, and the first condition includes any one or more of the following:
  • the first frame is received, and the first frame is used to indicate the end of the limited service period
  • the second frame is not received within the preset time period
  • the cell After receiving the non-low-latency service communication frame in the cell, the cell is the BSS where the STA is located.
  • the first frame is an EHT action frame
  • the EHT action field in the EHT action frame indicates the end of the restricted service period
  • the first communication device 1100 further includes:
  • the transceiver unit 1102 is configured to, when the first condition includes that the second frame is not received within a preset time period, before the STA determines that the limited service time period ends, receive a third frame, where the third frame carries a TWT element; Let the time period be determined by the Nominal Minimum TWT Wakeup Duration and Wakeup Time Unit fields in the TWT element.
  • the transceiver unit 1102 may also be configured to: when the first condition includes receiving a frame of non-low-latency service communication in the local cell, before the STA determines that the limited service time period ends, receive the fourth frame, the fourth frame carries the TWT element;
  • the TWT element carries the threshold access level of the non-low-latency service or the preset service identifier of the non-low-latency service.
  • the non-low-latency service means that the access level of the service is lower than or equal to the threshold access of the non-low-latency service.
  • Class of service, or non-low-latency service is a service whose service identifier is a preset service identifier of non-low-latency service.
  • the threshold access level of the non-low-latency service or the preset service identifier of the non-low-latency service is determined by the broadcast TWT recommendation field in the TWT element.
  • the processing unit 1101 may be further configured to: initiate a new channel access after determining that the limited service time period ends, or continue to perform the channel access suspended before the limited service time period.
  • processing unit 1101 and the transceiver unit 1102 reference may be made directly to the relevant description of the STA in the method embodiment shown in FIG. 3, and details are not repeated here.
  • FIG. 12 is a schematic structural diagram of a second communication apparatus provided by an embodiment of the present application.
  • the second communication apparatus may be a STA, or may be a module (eg, a chip) in the STA.
  • the second communication device 1200 at least includes: a processing unit 1201 and a transceiver unit 1202; wherein:
  • a processing unit 1201 configured to acquire the TXOP before the limited service time period arrives;
  • the processing unit 1201 is further configured to not end the TXOP before the arrival of the limited service time period if a second condition is met, and the second condition includes any one or more of the following:
  • TXOP is used to transmit the data frame of the first service
  • the transmission time of the transmission service in the TXOP is less than or equal to the first threshold
  • the restricted service period is the period for D2D transmission.
  • the second communication device 1200 further includes:
  • the transceiver unit 1202 is configured to receive a fifth frame, where the fifth frame carries a TWT element, when the second condition includes that the transmission time of the transmission service in the TXOP is less than or equal to the first threshold, and the TXOP is not ended before the limited service time period arrives , the TWT element carries the first threshold.
  • the first service is a low-latency service; the transceiver unit 1202 may also be used for:
  • the sixth frame is received before the TXOP ends before the limited service period arrives, and the sixth frame carries the TWT element; the TWT element carries the low-latency service
  • the threshold access level of the low-latency service or the preset service identifier of the low-latency service is a service whose access level is higher than or equal to the threshold access level of the low-latency service, or the low-latency service is a service The service identified as the preset service identifier of the low-latency service.
  • the threshold access level of the low-latency service or the preset service identifier of the low-latency service is determined by the broadcast TWT recommendation field in the TWT element.
  • the first service is an exceptional service; the transceiver unit 1202 is further configured to:
  • the seventh frame is not received before the TXOP ends before the limited service period arrives, and the seventh frame carries the TWT element; the TWT element carries the threshold of the exceptional service
  • the access level or the preset service identifier of the exceptional service is the service whose access level is higher than or equal to the threshold access level of the exceptional service, or the exceptional service is the service whose service identifier is the preset service identifier of the exceptional service business.
  • the threshold access level of the exceptional service or the preset service identifier of the exceptional service is determined by the exceptional access level field in the TWT element.
  • processing unit 1201 may also be used to:
  • the TXOP is ended.
  • processing unit 1201 may also be used to:
  • the transceiver unit 1202 can also be used to:
  • An eighth frame is received, and the eighth frame is used to indicate extending the limited service period.
  • the first communication device and the second communication device described in the embodiments of the present application may be implemented by a general bus architecture.
  • a first communication device includes a processor.
  • it also includes a transceiver that is internally connected and communicated with the processor.
  • the processor is configured to determine that the limited service time period ends if a first condition is satisfied, and the first condition includes any one or more of the following: receiving a first frame, the first frame being used to indicate the end of the limited service time period; The second frame is not received within the preset time period; the frame of non-low-latency service communication in the cell is received, and the cell is the BSS where the STA is located.
  • the first communication apparatus may further include a memory, where the memory is used to store instructions executed by the processor.
  • a second communication device includes a processor.
  • it also includes a transceiver that is internally connected and communicated with the processor.
  • the processor is configured to acquire the TXOP before the arrival of the limited service time period; the processing unit is further configured to not end the TXOP before the arrival of the limited service time period if a second condition is satisfied, and the second condition includes any one or more of the following A: TXOP is used to transmit the data frame of the first service; the transmission time of the transmission service in the TXOP is less than or equal to the first threshold; the limited service time period is the time period used for D2D transmission.
  • the second communication apparatus may further include a memory, where the memory is configured to store instructions executed by the processor.
  • the first communication device and the second communication device described in the embodiments of the present application may be implemented by chips.
  • the chip implementing the first communication device includes a processing circuit.
  • it also includes an output interface that communicates with the internal connection of the processing circuit.
  • the processing circuit is configured to determine that the limited service time period ends if the first condition is satisfied, and the first condition includes any one or more of the following: receiving a first frame, the first frame is used to indicate the end of the limited service time segment; the second frame is not received within the preset time period; the frame of non-low-latency service communication in the cell is received, and the cell is the BSS where the STA is located.
  • the chip may further include a storage medium for storing instructions executed by the processing circuit.
  • the chip implementing the second communication device includes a processing circuit.
  • it also includes an output interface that communicates with the internal connection of the processing circuit.
  • the processing circuit is configured to acquire the TXOP before the limited service time period arrives; the processing unit is further configured to not end the TXOP before the limited service time period arrives if the second condition is satisfied, and the second condition includes any one of the following or multiple: the TXOP is used to transmit the data frame of the first service; the transmission time of the transmission service in the TXOP is less than or equal to the first threshold; the limited service time period is the time period used for D2D transmission.
  • the second communication apparatus may further include a memory, where the memory is configured to store instructions executed by the processor.
  • the chip may further include a storage medium for storing instructions executed by the processing circuit.
  • the first communication device and the second communication device described in the embodiments of the present application may also be implemented by using the following: one or more FPGAs (Field Programmable Gate Arrays), PLDs (Programmable Gate Arrays) logic devices), controllers, state machines, gate logic, discrete hardware components, any other suitable circuits, or any combination of circuits capable of performing the various functions described throughout this application.
  • FPGAs Field Programmable Gate Arrays
  • PLDs Programmable Gate Arrays
  • controllers state machines, gate logic, discrete hardware components, any other suitable circuits, or any combination of circuits capable of performing the various functions described throughout this application.
  • first communication device and the second communication device in the above-mentioned various product forms respectively have any functions of the first communication device and the second communication device in the above method embodiments, which will not be repeated here.
  • Embodiments of the present application further provide a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, and when the instructions are executed on a computer, the computer can execute the method in any of the foregoing embodiments.
  • Embodiments of the present application also provide a computer program product, which, when the computer program product runs on a computer, causes the computer to execute the method in any of the foregoing embodiments.
  • Embodiments of the present application also provide a communication device, which can exist in the form of a chip, and the structure of the device includes a processor and an interface circuit, and the processor is used to communicate with other devices through a receiving circuit, so that the device performs the aforementioned The method of any of the embodiments.
  • the steps of the methods or algorithms described in conjunction with the disclosure of the present application may be implemented in a hardware manner, or may be implemented in a manner in which a processor executes software instructions.
  • the software instructions can be composed of corresponding software modules, and the software modules can be stored in random access memory (Random Access Memory, RAM), flash memory, Erasable Programmable Read-Only Memory (Erasable Programmable ROM, EPROM), electrically erasable programmable Programmable read-only memory (Electrically EPROM, EEPROM), registers, hard disk, removable hard disk, compact disk read only (CD-ROM), or any other form of storage medium known in the art.
  • An exemplary storage medium is coupled to the processor, such that the processor can read information from, and write information to, the storage medium.
  • the storage medium can also be an integral part of the processor.
  • the processor and storage medium may reside in an ASIC.
  • the ASIC may be located in the core network interface device.
  • the processor and the storage medium may also exist in the core network interface device as discrete components.
  • the functions described in this application may be implemented in hardware, software, firmware, or any combination thereof.
  • the functions When implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium.
  • Computer-readable media includes both computer-readable storage media and communication media including any medium that facilitates transfer of a computer program from one place to another.
  • a storage medium can be any available medium that can be accessed by a general purpose or special purpose computer.

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Abstract

本申请实施例涉及通信领域，提供了一种通信方法、装置及计算机可读存储介质。其中，本申请实施例的方法，包括：如果满足第一条件，站点STA判定受限的服务时间段结束，第一条件包括以下任意一个或多个：接收到第一帧，第一帧用于指示结束受限的服务时间段；在预设时间段内未接收到第二帧；接收到本小区内的非低时延业务通信的帧，本小区为STA所在的基本服务集BSS。采用本申请实施例，可以在R-TWT SP通信的情况下，节约通信资源。

Description

一种通信方法、装置及计算机可读存储介质
本申请要求于2020年12月31日提交中国专利局、申请号为202011635867.6、申请名称为“一种通信方法、装置及计算机可读存储介质”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及无线通信技术领域，尤其涉及一种通信方法、装置及计算机可读存储介质。
背景技术
目标唤醒时间(target wake time，TWT)是WiFi6定义的一种用于节能的技术，指的是站点(station，STA)和接入点(access point，AP)可以约定好服务时间(service period，SP)，在该服务时间保持活跃状态并进行通信，从而可以在服务时间以外的时间进行休眠，以达到节能的目的。根据约定服务时间方法的不同，TWT分可以为单播(individual)TWT和广播(broadcast)TWT。
限制型TWT SP(restricted TWT，R-TWT)仅仅只用于服务低时延业务，其他的非低时延业务不能在这段时间内进行通信。在R-TWT SP的长度超过当前低时延业务实际通信所需的时间长度的情况下，当前的低时延通信结束之后的R-TWT SP时间将会被浪费，从而造成了通信资源的浪费。
发明内容
本申请实施例提供了一种通信方法、装置及计算机可读存储介质，可以在R-TWT SP通信的情况下，节约通信资源。
第一方面，本申请实施例提供一种通信方法，该方法包括：如果满足第一条件，STA判定受限的服务时间段结束，第一条件包括以下任意一个或多个：接收到第一帧，第一帧用于指示结束受限的服务时间段；在预设时间段内未接收到第二帧；接收到本小区内的非低时延业务通信的帧，本小区为STA所在的基本服务集(basic service set，BSS)。
在本申请提供的方案中，对于受限的服务时间段，STA在满足第一条件的情况下，可以提前结束受限的服务时间段。由于STA在受限的服务时间段内只能进行低时延业务的通信，在满足第一条件中的任意一个或多个条件时，STA判定受限的服务时间段结束，则提前结束受限的服务时间段。这样，可以避免低时延业务完成之后，剩余空闲的受限的服务时间浪费，从而节约通信资源。
可以理解，受限的服务时间段为一段时间，AP和STA在这段时间内仅用于服务低时延业务。可选的，该受限的服务时间段可以称为R-SP(restricted service period，R-SP)，也可以称为限制型TWT SP(restricted TWT SP)。可理解的，该受限的服务时间段还可以有其它名称，本申请实施例对此不作限定。
结合第一方面，在一种可能的实现方式中，第一帧为极高吞吐率(extremely high  throughput，EHT)行动帧，EHT行动帧中的EHT行动字段指示结束受限的服务时间段。
在本申请提供的方案中，第一帧可以是EHT行动帧，也可以是CF-end帧，还可以是其它的帧。
结合第一方面，在一种可能的实现方式中，当第一条件包括在预设时间段内未接收到第二帧时，在STA判定受限的服务时间段结束之前，该通信方法还包括：STA接收第三帧，第三帧携带TWT元素；预设时间段由TWT元素中的标称最小TWT唤醒持续时间字段和唤醒时间单位字段确定。
在本申请提供的方案中，预设时间段可以是STA通过接收第三帧获取到的，也可以是标准规定的。
结合第一方面，在一种可能的实现方式中，当第一条件包括接收到本小区内的非低时延业务通信的帧时，在STA判定受限的服务时间段结束之前，该通信方法还包括：STA接收第四帧，第四帧携带TWT元素；TWT元素中携带非低时延业务的阈值接入等级(access category，AC)或者非低时延业务的预设业务标识(traffic identifier，TID)，非低时延业务为业务的接入等级低于或等于非低时延业务的阈值接入等级的业务，或者，非低时延业务为业务标识为非低时延业务的预设业务标识的业务。
在本申请提供的方案中，要满足接收到本小区内的非低时延业务通信的帧的这一条件，STA需要获取非低时延业务的阈值接入等级或非低时延业务的预设业务标识，可以判定当前接收到的业务是否为非低时延业务，从而判定是否满足接收到本小区内的非低时延业务通信的帧的这一条件，在满足这一条件的情况下，可以判定受限的服务时间段结束。
结合第一方面，在一种可能的实现方式中，非低时延业务的阈值接入等级或者非低时延业务的预设业务标识由TWT元素中的广播TWT推荐字段确定。
在本申请提供的方案中，非低时延业务的阈值接入等级或者非低时延业务的预设业务标识可以携带于TWT元素中，无需新设置一个元素专门承载非低时延业务的阈值接入等级或者非低时延业务的预设业务标识，以节约通信资源。
结合第一方面，在一种可能的实现方式中，该通信方法还包括：STA判定受限的服务时间段结束后，发起新的信道接入，或者，继续进行受限的服务时间段之前暂停的信道接入。
在本申请提供的方案中，当STA判定受限的服务时间段结束，提前结束受限的服务时间段时，可以继续信道接入，可以尽量减少空闲通信时间的浪费。
第二方面，本申请实施例提供一种通信方法，可以在R-TWT SP通信的情况下，可以保证正在传输中的低时延业务的传输不被中断。该通信方法包括：STA在受限的服务时间段到来之前获取传输机会(transmit opportunity，TXOP)；如果满足第二条件，STA不在受限的服务时间段到来之前结束TXOP，第二条件包括以下任意一个或多个：TXOP用于传输第一业务的数据帧；TXOP内传输业务的传输时间小于或等于第一阈值；受限的服务时间段是用于设备到设备(device to device，D2D)传输的时间段。
在本申请提供的方案中，由于STA在受限的服务时间段到来之前需要结束自己的TXOP，但如果满足例外条件(第二条件)中任意一个或多个，STA可以无需在受限的服务 时间段到来之前结束自己的传输机会。这样，使得正在传输中的低时延业务的传输不被中断，从而保证STA自身的低时延业务的时延性能。
STA不在受限的服务时间段到来之前结束TXOP，可以理解为，STA在受限的服务时间段到来之前不结束TXOP。也可以理解为，STA在受限的服务时间段到来继续当前的业务传输。
结合第二方面，在一种可能的实现方式中，当第二条件包括TXOP内传输业务的传输时间小于或等于第一阈值时，在STA不在受限的服务时间段到来之前结束TXOP之前，该通信方法还包括：STA接收第五帧，第五帧携带TWT元素，TWT元素中携带有第一阈值。
在本申请提供的方案中，满足TXOP内传输业务的传输时间小于或等于第一阈值这一条件前，STA需要获取第一阈值的信息。第一阈值的信息可以是STA通过接收第五帧携带的TWT元素获取的，也可以是标准规定的。
结合第二方面，在一种可能的实现方式中，第一业务为低时延业务；当第二条件包括TXOP用于传输第一业务的数据帧时，在STA不在受限的服务时间段到来之前结束TXOP之前，该通信方法还包括：STA接收第六帧，第六帧携带TWT元素；TWT元素中携带低时延业务的阈值接入等级或者低时延业务的预设业务标识，低时延业务为业务的接入等级高于或等于低时延业务的阈值接入等级的业务，或者，低时延业务为业务标识为低时延业务的预设业务标识的业务。
在本申请提供的方案中，第一业务可以是低时延业务，要满足TXOP用于传输第一业务的数据帧的这一条件，STA需要获取低时延业务的阈值接入等级或低时延业务的预设业务标识，可以判定当前接收到的业务是否为低时延业务，从而判定是否满足TXOP用于传输第一业务的数据帧的这一条件，在满足这一条件的情况下，STA可以无需在受限的服务时间段到来之前结束自己的传输机会，这样，使得正在传输中的低时延业务的传输不被中断，从而保证STA自身的低时延业务的时延性能。
结合第二方面，在一种可能的实现方式中，低时延业务的阈值接入等级或者低时延业务的预设业务标识由TWT元素中的广播TWT推荐字段确定。
在本申请提供的方案中，低时延业务的阈值接入等级或者低时延业务的预设业务标识可以携带于TWT元素中，无需新设置一个元素专门承载低时延业务的阈值接入等级或者低时延业务的预设业务标识，以节约通信资源。
结合第二方面，在一种可能的实现方式中，第一业务为例外业务；当第二条件包括TXOP用于传输第一业务的数据帧时，在STA不在受限的服务时间段到来之前结束TXOP之前，该通信方法还包括：STA接收第七帧，第七帧携带TWT元素；TWT元素中携带例外业务的阈值接入等级或者例外业务的预设业务标识，例外业务为业务的接入等级高于或等于例外业务的阈值接入等级的业务，或者，例外业务为业务标识为例外业务的预设业务标识的业务。
在本申请提供的方案中，第一业务可以是例外业务，要满足TXOP用于传输第一业务的数据帧的这一条件，STA需要获取例外业务的阈值接入等级或例外业务的预设业务标识，可以判定当前接收到的业务是否为例外业务，从而判定是否满足TXOP用于传输第一业务的数据帧的这一条件，在满足这一条件的情况下，STA可以无需在受限的服务时间段到来 之前结束自己的传输机会。这样，使得正在传输中的业务的传输不被中断，从而保证STA自身的业务的时延性能。
结合第二方面，在一种可能的实现方式中，例外业务的阈值接入等级或者例外业务的预设业务标识由TWT元素中的例外接入等级字段确定。
在本申请提供的方案中，例外业务的阈值接入等级或者例外业务的预设业务标识可以携带于TWT元素中，无需新设置一个元素专门承载例外业务的阈值接入等级或者例外业务的预设业务标识，以节约通信资源。
结合第二方面，在一种可能的实现方式中，该通信方法还包括：当受限的服务时间段到来时，当TXOP内传输业务的传输时间大于第二阈值时，STA结束TXOP。
在本申请提供的方案中，当受限的服务时间段到来时，一种可能的实现方式，STA仅可继续传输一段时间，但不能超过第二阈值。第二阈值可以是标准规定的某个值，也可以是由AP发送给STA的，例如，携带在TWT元素中发送的。这样，可以减少对受限的服务时间段的影响。
可以理解，第二阈值可以等于第一阈值，即当TXOP的当前业务传输完毕，STA才结束该TXOP。
结合第二方面，在一种可能的实现方式中，该通信方法还包括：当受限的服务时间段到来时，STA在TXOP内继续传输至多一个物理层协议数据单元(presentation protocol data unit，PPDU)。
在本申请提供的方案中，当受限的服务时间段到来时，另一种可能的实现方式，STA在TXOP内继续传输时，只能传输一个PPDU。这样，可以减少对受限的服务时间段的影响。
结合第二方面，在一种可能的实现方式中，该通信方法还包括：STA接收第八帧，第八帧用于指示延长受限的服务时间段。
在本申请提供的方案中，当受限的服务时间段到来时，又一种可能的实现方式，STA可以通过接收用于指示延长受限的服务时间段的帧。先将当前的传输继续传输完毕后，开始受限的服务时间段的传输。延长受限的服务时间段的时长，可以减少对受限的服务时间段中的业务传输的影响。
第三方面，本申请实施例提供一种第一通信装置，该第一通信装置可以应用于STA，包括：
处理单元，用于如果满足第一条件，判定受限的服务时间段结束，第一条件包括以下任意一个或多个：
接收到第一帧，第一帧用于指示结束受限的服务时间段；
在预设时间段内未接收到第二帧；
接收到本小区内的非低时延业务通信的帧，本小区为STA所在的BSS。
结合第三方面，在一种可能的实现方式中，第一帧为EHT行动帧，EHT行动帧中的EHT行动字段指示结束受限的服务时间段。
结合第三方面，在一种可能的实现方式中，该第一通信装置还包括：
收发单元，用于当第一条件包括在预设时间段内未接收到第二帧时，在STA判定受限的服务时间段结束之前，接收第三帧，第三帧携带TWT元素；预设时间段由TWT元素中的标称最小TWT唤醒持续时间字段和唤醒时间单位字段确定。
结合第三方面，在一种可能的实现方式中，上述收发单元还可以用于：当第一条件包括接收到本小区内的非低时延业务通信的帧时，在STA判定受限的服务时间段结束之前，接收第四帧，第四帧携带TWT元素；
TWT元素中携带非低时延业务的阈值接入等级或者非低时延业务的预设业务标识，非低时延业务为业务的接入等级低于或等于非低时延业务的阈值接入等级的业务，或者，非低时延业务为业务标识为非低时延业务的预设业务标识的业务。
结合第三方面，在一种可能的实现方式中，非低时延业务的阈值接入等级或者非低时延业务的预设业务标识由TWT元素中的广播TWT推荐字段确定。
结合第三方面，在一种可能的实现方式中，上述处理单元还可以用于：判定受限的服务时间段结束后，发起新的信道接入，或者，继续进行受限的服务时间段之前暂停的信道接入。
第四方面，本申请实施例提供一种第二通信装置，该第二通信装置可以应用于STA，包括：
处理单元，用于在受限的服务时间段到来之前获取TXOP；
该处理单元，还用于如果满足第二条件，不在受限的服务时间段到来之前结束TXOP，第二条件包括以下任意一个或多个：
TXOP用于传输第一业务的数据帧；
TXOP内传输业务的传输时间小于或等于第一阈值；
受限的服务时间段是用于D2D传输的时间段。
结合第四方面，在一种可能的实现方式中，该第二通信装置还包括：
收发单元，用于当第二条件包括TXOP内传输业务的传输时间小于或等于第一阈值时，不在受限的服务时间段到来之前结束TXOP之前，接收第五帧，第五帧携带TWT元素，TWT元素中携带有第一阈值。
结合第四方面，在一种可能的实现方式中，第一业务为低时延业务；上述收发单元还可以用于：
当第二条件包括TXOP用于传输第一业务的数据帧时，不在受限的服务时间段到来之前结束TXOP之前，接收第六帧，第六帧携带TWT元素；TWT元素中携带低时延业务的阈值接入等级或者低时延业务的预设业务标识，低时延业务为业务的接入等级高于或等于低时延业务的阈值接入等级的业务，或者，低时延业务为业务标识为低时延业务的预设业务标识的业务。
结合第四方面，在一种可能的实现方式中，低时延业务的阈值接入等级或者低时延业务的预设业务标识由TWT元素中的广播TWT推荐字段确定。
结合第四方面，在一种可能的实现方式中，第一业务为例外业务；上述收发单元还用于：
当第二条件包括TXOP用于传输第一业务的数据帧时，不在受限的服务时间段到来之前结束TXOP之前，接收第七帧，第七帧携带TWT元素；TWT元素中携带例外业务的阈值接入等级或者例外业务的预设业务标识，例外业务为业务的接入等级高于或等于例外业务的阈值接入等级的业务，或者，例外业务为业务标识为例外业务的预设业务标识的业务。
结合第四方面，在一种可能的实现方式中，例外业务的阈值接入等级或者例外业务的预设业务标识由TWT元素中的例外接入等级字段确定。
结合第四方面，在一种可能的实现方式中，上述处理单元还可以用于：
当受限的服务时间段到来时，当TXOP内传输业务的传输时间大于第二阈值时，结束TXOP。
结合第四方面，在一种可能的实现方式中，上述处理单元还可以用于：
当受限的服务时间段到来时，在TXOP内继续传输至多一个PPDU。
结合第四方面，在一种可能的实现方式中，上述收发单元还可以用于：
接收第八帧，第八帧用于指示延长受限的服务时间段。
第五方面，本申请实施例提供一种第一通信装置，该第一通信装置可以应用于STA，包括处理器。可选的，还包括与处理器内部连接通信的收发器。该处理器用于如果满足第一条件，判定受限的服务时间段结束，第一条件包括以下任意一个或多个：
接收到第一帧，第一帧用于指示结束受限的服务时间段；
在预设时间段内未接收到第二帧；
接收到本小区内的非低时延业务通信的帧，本小区为STA所在的BSS。
第五方面提供的第一通信装置用于执行上述第一方面或第一方面任意可能的实现方式，具体细节可参见上述第一方面或第一方面任意可能的实现方式，此处不再赘述。
第六方面，本申请实施例提供一种第二通信装置，该第二通信装置可以应用于STA，包括处理器。可选的，还包括与处理器内部连接通信的收发器。该处理器用于在受限的服务时间段到来之前获取TXOP；
该处理单元，还用于如果满足第二条件，不在受限的服务时间段到来之前结束TXOP，第二条件包括以下任意一个或多个：
TXOP用于传输第一业务的数据帧；
TXOP内传输业务的传输时间小于或等于第一阈值；
受限的服务时间段是用于D2D传输的时间段。
第六方面提供的第二通信装置用于执行上述第二方面或第二方面任意可能的实现方式，具体细节可参见上述第二方面或第二方面任意可能的实现方式，此处不再赘述。
第七方面，本申请实施例提供一种第一通信装置，该第一通信装置可以应用于STA，包括处理电路。可选的，还包括与处理电路内部连接通信的输出接口。该处理电路用于如果满足第一条件，判定受限的服务时间段结束，第一条件包括以下任意一个或多个：
接收到第一帧，第一帧用于指示结束受限的服务时间段；
在预设时间段内未接收到第二帧；
接收到本小区内的非低时延业务通信的帧，本小区为STA所在的BSS。
第七方面提供的第一通信装置用于执行上述第一方面或第一方面任意可能的实现方式，具体细节可参见上述第一方面或第一方面任意可能的实现方式，此处不再赘述。
第八方面，本申请实施例提供一种第二通信装置，该第二通信装置可以应用于STA，包括处理电路。可选的，还包括与处理电路内部连接通信的输出接口。该处理电路用于在受限的服务时间段到来之前获取TXOP；
该处理单元，还用于如果满足第二条件，不在受限的服务时间段到来之前结束TXOP，第二条件包括以下任意一个或多个：
TXOP用于传输第一业务的数据帧；
TXOP内传输业务的传输时间小于或等于第一阈值；
受限的服务时间段是用于D2D传输的时间段。
第八方面提供的第二通信装置用于执行上述第二方面或第二方面任意可能的实现方式，具体细节可参见上述第二方面或第二方面任意可能的实现方式，此处不再赘述。
第九方面，本申请实施例提供一种计算机可读存储介质，该计算机可读存储介质中存储有指令，当该指令在计算机上运行时，使得计算机执行上述第一方面或第一方面任意可能的实现方式的方法。
第十方面，本申请实施例提供一种计算机可读存储介质，该计算机可读存储介质中存储有指令，当该指令在计算机上运行时，使得计算机执行上述第二方面或第二方面任意可能的实现方式的方法。
第十一方面，本申请实施例提供一种包含程序指令的计算机程序产品，当其在计算机上运行时，使得计算机执行上述第一方面或第一方面任意可能的实现方式的方法。
第十二方面，本申请实施例提供一种包含程序指令的计算机程序产品，当其在计算机上运行时，使得计算机执行上述第二方面或第二方面任意可能的实现方式的方法。
第十三方面，本申请实施例提供一种通信系统，所述通信系统包括上述第三方面或第五方面或第七方面所提供的第一通信装置，和，上述第四方面或第六方面或第八方面所提供的第二通信装置。
附图说明
图1是现有技术中的一种TWT服务阶段的实现方式的示意图；
图2是本申请实施例提供的一种通信系统的示意图；
图3是本申请实施例提供的一种通信方法的流程示意图；
图4是本申请实施例提供的一种帧结构的示意图；
图5A是本申请实施例提供的一种TWT元素的帧结构示意图；
图5B是本申请实施例提供的一种EHT操作元素的帧结构示意图；
图6A是本申请实施例提供的另一种TWT元素的帧结构示意图；
图6B是本申请实施例提供的另一种EHT操作元素的帧结构示意图；
图7是本申请实施例提供的又一种TWT元素的帧结构示意图；
图8是本申请实施例提供的另一种通信方法的流程示意图；
图9A是本申请实施例提供的又一种TWT元素的帧结构示意图；
图9B是本申请实施例提供的又一种EHT操作元素的帧结构示意图；
图10是本申请实施例提供的另一种帧结构的示意图；
图11是本申请实施例提供的一种第一通信装置的结构示意图；
图12是本申请实施例提供的一种第二通信装置的结构示意图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述。
为了便于理解本申请，首先在此介绍本申请实施例涉及的相关技术知识。
1、TWT
TWT是WiFi6定义的一种用于节能的技术。核心思想是通过设置一些周期性的时间段，使得某些设备只需要在这些TWT服务阶段(service period，TWT SP)中保持活跃状态，在其他的时间可以进行休眠，从而达到节能的目的。
TWT分为单播TWT(individual TWT)和广播TWT(broadcast TWT)，在单播TWT中，每个STA可以单独与AP建立一个TWT协议，因此，每个STA可以有自己的活跃时间段和休眠时间段；在广播TWT中，AP可以为一组STA建立一个公用的TWT协议，多个STA在相同的活跃时间段进行工作，在其他时间段进行休眠。
单播TWT：
单播TWT是指TWT请求站点(requesting)向TWT应答站点(responding)发送TWT请求消息，请求设定一个醒来的时间。应答站点在接收到TWT请求消息之后向请求站点发送TWT应答消息，交互成功后，请求站点与应答站点之间就建立了一个TWT协议。当TWT协议达成后，请求站点与应答站点都应该在约定好的时间段保持活跃状态，以便进行数据的收发。在上述时间段之外，站点可进行休眠以达到节能的目的。通常来说是由STA向AP发送TWT协议建立请求，即STA为请求站点，AP为应答站点，当然AP也可以向站点发起TWT协议建立请求。TWT协议建立后，约定好的活跃时间段称为TWT服务阶段。请参阅图1，图1是现有技术中的一种TWT服务阶段的实现方式的示意图。如图1所示，STA向AP发送TWT请求帧请求TWT协议，AP向STA发送TWT响应帧。每个TWT协议可以包含多个周期性出现的等长的TWT服务阶段。
广播TWT：
与单播TWT不同，广播TWT提供了一种“批量管理”机制，AP可以与多个STA建立一系列周期性出现的TWT服务阶段。在TWT服务阶段中，上述多个STA需要保持活跃状态，从而与AP进行通信。
AP可以在信标帧(beacon帧)中携带一个或多个广播TWT的信息，每个广播TWT是由一个广播TWT标识符和AP的介质访问控制(media access control，MAC)地址共同表示的。STA在收到信标帧后，如果有加入广播TWT的意愿，可以向AP发送广播TWT建立请求消 息，从而加入广播TWT。在广播TWT建立时，需要指定广播TWT标识符来请求加入某个特定的广播TWT。加入广播TWT之后，STA可以按照TWT参数集所指示的服务阶段唤醒，从而与AP进行通信。需要说明的是，若STA支持广播TWT，但没有显式地加入某个广播TWT ID，则默认参与广播TWT ID＝0的广播TWT。
与单播TWT类似，广播TWT的参数集也指定了TWT服务阶段出现的周期以及每个TWT服务阶段的持续时长。除此之外，广播TWT参数还包括广播TWT的生命周期，它以信标帧间隔为单位，表示所建立的广播TWT的持续时长。
2、低时延通信
随着无线网络的发展以及无线局域网(wireless local area network，WLAN)技术的不断升级，越来越多的应用流量由WiFi承载。另一方面，层出不穷的移动应用对WLAN的时延性能也要求越来越高。例如无线视频、语音、游戏、增强现实(augmented reality，AR)/虚拟现实(virtual reality，VR)等应用对通信的时延就有着很高的要求。
为了尽可能地满足不同类型的流量需求，WLAN需要将不同的业务进行优先级划分。例如，WLAN在信道竞争接入过程中每个设备存在四个不同的接入等级，通过不同的竞争参数实现传输优先级划分；每个接入等级可以包括两个业务标识来对应两种不同的业务。通常，低时延业务的数据包是周期性产生的。
受限制的TWT服务阶段(restricted TWT SP，R-TWT-SP)仅仅是用来服务低时延业务的，其他的业务不能在这段时间内进行通信。除此之外，若STA在R-TWT-SP之前已经开始了通信，则必须在R-TWT-SP开始之前结束当前的通信。
该机制的技术缺陷，包括以下两个方面：
1、R-TWT-SP的长度可能超过低时延业务实际通信所需的时间长度。然而，根据规定，在R-TWT-SP之内，不允许进行其他的通信，因此在低时延通信结束之后的R-TWT-SP时间将会被浪费。
2、在R-TWT-SP到来之前，STA正在进行的通信可能也是低时延业务的通信，然而，根据规定，STA必须在R-TWT-SP到来之前结束自己的传输机会(transmit opportunity，TXOP)，这会影响STA自身的低时延业务的时延性能。
基于在低时延通信结束之后的R-TWT-SP时间将会被浪费的问题，本申请实施例提供一种通信方法，可以在R-TWT SP通信的情况下，节约通信资源。该通信方法具体为：如果满足第一条件，STA判定受限的服务时间段结束，第一条件包括以下任意一个或多个：接收到第一帧，第一帧用于指示结束受限的服务时间段；在预设时间段内未接收到第二帧；接收到本小区内的非低时延业务通信的帧，本小区为STA所在的BSS。由于STA在受限的服务时间段内只能进行低时延业务的通信，在满足第一条件中的任意一个或多个条件时，STA判定受限的服务时间段结束，则提前结束受限的服务时间段。这样，可以避免低时延业务完成之后，剩余空闲的受限的服务时间浪费，从而节约通信资源。
基于影响STA自身的低时延业务的时延性能的问题，本申请实施例提供一种通信方法，可以使得正在传输中的低时延业务的传输不被中断，从而保证STA自身的低时延业务的时 延性能。该通信方法具体为：STA在受限的服务时间段到来之前获取TXOP；如果满足第二条件，STA不在受限的服务时间段到来之前结束TXOP，第二条件包括以下任意一个或多个：TXOP用于传输第一业务的数据帧；TXOP内传输业务的传输时间小于或等于第一阈值；受限的服务时间段是用于D2D传输的时间段。由于STA在受限的服务时间段到来之前需要结束自己的TXOP，但如果满足例外条件(第二条件)中任意一个或多个，STA可以无需在受限的服务时间段到来之前结束自己的传输机会。这样，使得正在传输中的低时延业务的传输不被中断，从而保证STA自身的低时延业务的时延性能。
为了更好地理解本申请实施例提供的一种通信方法、装置及计算机可读存储介质，下面先对本申请实施例应用的通信系统进行描述。
应理解，本申请实施例的技术方案可以应用于各种通信系统，例如：WIFI无线通信系统、全球移动通信(global system of mobile communication，GSM)系统、码分多址(code division multiple access，CDMA)系统、宽带码分多址(wideband code division multiple access，WCDMA)系统、通用分组无线业务(general packet radio service，GPRS)系统、长期演进(long term evolution，LTE)系统、LTE频分双工(frequency division duplex，FDD)系统、LTE时分双工(time division duplex，TDD)系统、通用移动通信系统(universal mobile telecommunication system，UMTS)、全球互联微波接入(worldwide interoperability for microwave access，WiMAX)通信系统、未来的其他演进系统、或其他各种采用无线接入技术的无线通信系统等。
请参阅图2，图2是本申请实施例提供的一种通信系统的示意图。如图2所示，该通信系统包括一个网络设备和位于网络设备覆盖范围内的至少一个终端设备。网络设备可以为特定的地理区域提供通信覆盖，与位于该覆盖区域内的终端设备进行通信。网络设备可以是GSM系统或码分多址(code division multiple access，CDMA)系统中的基站(base transceiver station，BTS)，可以是WCDMA系统中的基站(node B，NB)，可以是LTE系统中的演进型基站(evolutional node B，eNB或eNodeB)，可以是云无线接入网络(cloud radio access network，CRAN)中的无线控制器，或者可以是中继站、接入点AP、车载设备、可穿戴设备、未来网络中的网络侧设备等。终端设备可以是移动的或固定的，终端设备可以是站点STA、接入终端、用户设备(user equipment，UE)、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、无线通信设备、用户代理或用户装置等等。
需要说明的是，本申请实施例中的STA是支持R-TWT-SP的STA。STA可以事先声明其是否支持R-TWT-SP，若支持，STA必须在R-TWT-SP开始之前结束其正在进行的非低时延业务的通信；若不支持，则STA可以无需理会R-TWT-SP的存在。由于R-TWT-SP对支持该特性的STA的非低时延业务的通信有一定的影响，本申请实施例中的R-TWT-SP仅可服务支持R-TWT-SP特性的STA。
应理解，图2所示的通信系统只是示例性说明，并不对其构成限定。
图3是本申请实施例提供的一种通信方法的流程示意图。以下以STA为例，说明该方法，但应理解，本方法不局限STA执行，AP也可以执行。本文所述的STA包括STA侧的各种形 态的装置/设备，AP包括AP侧的形态的各种装置/设备。如图3所示，该通信方法包括但不限于以下步骤。
301、如果满足第一条件；
302、STA判定受限的服务时间段结束。
其中，第一条件包括以下任意一个或多个条件：
条件1)：STA接收到用于指示结束受限的服务时间段的第一帧；
条件2)：STA在预设时间段内未接收到第二帧；
条件3)：STA接收到本小区内的非低时延业务通信的帧。
受限的服务时间段为一段时间，AP和STA在这段时间内仅用于服务低时延业务。可选的，该受限的服务时间段可以称为R-SP(restricted service period，R-SP)，也可以称为限制型TWT SP(restricted TWT SP)。可理解的，该受限的服务时间段还可以有其它名称，本申请实施例对此不作限定。
可以理解，为了保证多个小区之间的受限的服务时间段互不影响，AP可以向其他的AP发送其自身的受限的服务时间段的参数值。其他AP在设置其自身的受限的服务时间段的参数值时，需保证多个AP之间的受限的服务时间段的时间段不重叠。
下面对第一条件分别进行详细说明，应理解，第一条件包括但不限于以上的三个条件。
对于条件1)：
AP指示受限的服务时间段已结束，向STA发送用于指示结束受限的服务时间段的第一帧，STA接收AP发送的第一帧后，判定受限的服务时间段结束。
具体的，AP指示受限的服务时间段已结束可以分为两种情况：
第一种情况：当受限的服务时间段之内的低时延业务通信已经结束，则AP可以在受限的服务时间段之内向STA发送用于指示结束受限的服务时间段的第一帧；
第二种情况：若本次受限的服务时间段之内不存在低时延业务的通信，AP可以在受限的服务时间段到来之前向STA发送用于指示结束受限的服务时间段的第一帧。
第一帧的一种实现方式：第一帧可以是EHT行动帧的一种。请参阅图4，图4是本申请实施例提供的一种帧结构的示意图。如图4所示，该EHT行动帧可以包括帧控制(frame control)字段、时长(duration)字段、接收端地址(Receiver address，RA)字段、发送端地址(sending address，TA)字段、基本服务集标识(BSS ID)字段、序列控制(sequence control)字段、高吞吐率控制(HT control)字段、帧体(frame body)字段和帧校验序列(frame check sequence，FCS)字段。其中，帧体(frame body)字段包括类别(category)子字段和极高吞吐率行动(EHT action)子字段。其中，极高吞吐率行动(EHT action)子字段的取值表示EHT行动帧用于终止当前的受限的服务时间段。例如，当极高吞吐率行动(EHT action)子字段的取值为0时，可以用于表示终止当前的受限的服务时间段，或者，当极高吞吐率行动(EHT action)子字段的取值为1时，可以用于表示终止当前的受限的服务时间段。极高吞吐率行动(EHT action)子字段的取值还可以是2或3等数值，用于表示终止当前的受限的服务时间段。可以理解，极高吞吐率行动(EHT action)子字段的取值只是示例性说明，并不对其构成限定。
第一帧的另一种实现方式：第一帧可以是无竞争结束(contention free end，CF-End) 帧。STA在受限的服务时间段之内收到AP发送的CF-End帧，则判定受限的服务时间段结束。
第一帧可以是以广播的形式发送的。
对于条件2)：
STA进入受限的服务时间段后，若在预设时间段内未接受到第二帧，则判定受限的服务时间段结束。
其中，预设时间段可以是AP发送给STA的，例如，携带在TWT元素中或者携带在EHT操作元素(EHT operation element)中发送，具体的，可以由TWT元素的标称最小TWT唤醒持续时间(nominal minimum TWT wake duration)字段和唤醒时间单位(wake duration unit)字段确定，或者，可以由EHT操作元素中的最小受限的服务时间(minimum restricted service period duration)字段确定。预设时间段也可以是标准规定的。例如，预设时间段可以是1ms(毫秒)、100us(微秒)等。预设时间段小于受限的服务时间段。
若预设时间段是由AP发送给STA的，则STA可以接收AP发送的携带TWT元素或EHT操作元素的第三帧。第三帧可以是信标帧(beacon)，也可以是TWT响应帧。
请参阅图5A，图5A是本申请实施例提供的一种TWT元素的帧结构示意图。如图5A所示，该TWT元素可以包括元素标识(element ID)字段、长度(length)字段、控制(control)字段、TWT参数信息(TWT parameter information)字段。其中，TWT参数信息(TWT parameter information)字段可以包括标称最小TWT唤醒持续时间(nominal minimum TWT wake duration)子字段。控制(control)字段可以包括唤醒时间单位(wake duration unit)子字段。
请参阅图5B，图5B是本申请实施例提供的一种EHT操作元素的帧结构示意图。如图5B所示，该EHT操作元素可以包括最小受限的服务时间(minimum restricted service period duration)字段。可以理解，该字段用于指示预设时间段的长度，也可以有其他的名称，对该字段的名称不作限定。
预设时间段可以由如图5A的TWT元素中的标称最小TWT唤醒持续时间(nominal minimum TWT wake duration)字段和唤醒时间单位(wake duration unit)字段确定：
具体的，STA接收到第三帧后，可以根据标称最小TWT唤醒持续时间(nominal minimum TWT wake duration)字段和唤醒时间单位(wake duration unit)字段确定受限的服务时间段的长度，例如，标准中规定的唤醒时间单位(wake duration unit)字段的取值为0时表示单位为256us(微秒)，唤醒时间单位(wake duration unit)字段的取值为1时表示单位为1024us(微秒)。预设时间段的时长等于标称最小TWT唤醒持续时间(nominal minimum TWT wake duration)字段所表示的数值乘以唤醒时间单位字段所表示的时间单位，再乘以第一系数得到。第一系数可以是预定义的值，例如，0.1,0.2,0.5,0.8,1等。该第一系数可以是AP发送给STA的；具体的，该第一系数可以是携带在TWT元素中的。
预设时间段也可以由如图5B的EHT操作元素中的最小受限的服务时间(minimum restricted service period duration)字段确定：
具体的，STA接收到第三帧后，可以根据最小受限的服务时间(minimum restricted service period duration)字段确定预设时间段的长度。
第二帧可以是本小区内低时延业务通信的帧，也可以是本小区内AP发送的帧，还可以 是任意帧。
其中，本小区可以理解为是STA所在的BSS。STA可以提前获取到本小区的BSS color的值。STA可以根据收到的帧的物理层帧头或者MAC层帧头来判断所接受到的帧是否为本小区内的帧。具体的，可以通过物理层帧头中的BSS color字段来判断，若接收到的BSS color字段与本小区的BSS color的值相同，则判定接收到的帧为本小区内的帧；还可以通过MAC层帧头中的接收地址或发送地址字段来判断，若接收地址或发送地址字段的值与本小区的AP的MAC地址相同，则判定接收到的帧为本小区内的帧。
低时延业务可以是业务的接入等级高于或等于某些特定接入等级(低时延业务的阈值接入等级)的业务，也可以是业务标识为某些特定标识(低时延业务的预设业务标识)的业务。可以理解，低时延业务可以是业务的接入等级所对应的优先级高于或等于某些特定接入等级(低时延业务的阈值接入等级)所对应的优先级的业务，也可以是业务标识为某些特定标识(低时延业务的预设业务标识)的业务。低时延业务的阈值接入等级或低时延业务的预设业务标识可以是由AP发送给STA的，例如，携带在TWT元素或者携带在EHT操作元素(EHT operation element)中发送。低时延业务的阈值接入等级或低时延业务的预设业务标识也可以是标准规定的。例如AC＝AC_VO或AC＝AC_VI；或者TID＝0或1。可选的，业务标识可以是具体的业务标识名称，也可以是某一具体的值。
若低时延业务的阈值接入等级或低时延业务的预设业务标识是由AP发送给STA的，则STA可以接收AP发送的携带TWT元素或EHT操作元素的第六帧。第六帧可以是信标帧(beacon)，也可以是TWT响应帧。
请参阅图6A，图6A是本申请实施例提供的另一种TWT元素的帧结构示意图。如图6A所示，该TWT元素可以包括元素标识(element ID)字段、长度(length)字段、控制(control)字段、TWT参数信息(TWT parameter information)字段。其中，TWT参数信息(TWT parameter information)字段可以包括请求类型(request type)子字段、目标唤醒时间(target wake time)子字段、标称最小TWT唤醒持续时间(nominal minimum TWT wake duration)子字段、TWT唤醒间隔小数部分(TWT wake interval mantissa)子字段和广播TWT信息(broadcast TWT Info)子字段。其中，请求类型(request type)子字段可以包括广播TWT推荐(broadcast TWT recommendation)子字段。
请参阅图6B，图6B是本申请实施例提供的另一种EHT操作元素的帧结构示意图。如图6B所示，该EHT操作元素可以包括阈值接入等级或预设业务标识字段。可以理解，阈值接入等级或预设业务标识字段可以用于指示低时延业务的阈值接入等级或低时延业务的预设业务标识字段，也可以有其他的名称，对该字段的名称不作限定。
低时延业务的阈值接入等级或低时延业务的预设业务标识可以由如图6A所示的TWT元素中的广播TWT推荐(broadcast TWT recommendation)字段或者由如图6B所示的EHT操作元素中的阈值接入等级或预设业务标识字段确定。下面具体介绍低时延业务的阈值接入等级或低时延业务的预设业务标识可以由如图6A所示的TWT元素中的广播TWT推荐(broadcast TWT recommendation)字段确定的实现方式：
在一种可能的实现方式中，广播TWT推荐(broadcast TWT recommendation)字段可以通过索引的方式指示低时延业务的阈值接入等级或低时延业务的预设业务标识。具体的， 广播TWT推荐(broadcast TWT recommendation)字段的取值可以表示索引值，索引值可以与低时延业务的阈值接入等级或低时延业务的预设业务标识对应。具体的，广播TWT推荐(broadcast TWT recommendation)字段通过索引值的方式指示低时延业务的阈值接入等级或低时延业务的预设业务标识。
广播TWT推荐(broadcast TWT recommendation)字段的取值与低时延业务的阈值接入等级的对应关系可以为下述表1所示。
表1
Figure PCTCN2021142348-appb-000001
表1中，当广播TWT推荐(broadcast TWT recommendation)字段的取值为第一值时，第一值对应的低时延业务的阈值接入等级为AC_VO；当广播TWT推荐(broadcast TWT recommendation)字段的取值为第二值时，第二值对应的低时延业务的阈值接入等级为AC_VO和AC_VI。可理解的，表1所示的广播TWT推荐(broadcast TWT recommendation)字段的取值与低时延业务的阈值接入等级的对应关系仅是示例，在实际应用中，可以根据实际应用场景确定广播TWT推荐(broadcast TWT recommendation)字段的取值与低时延业务的阈值接入等级的对应关系。本申请实施例对此不做限定。
若STA接收到的TWT元素中的广播TWT推荐(broadcast TWT recommendation)字段是索引值时，可以根据索引值确定该索引值对应的低时延业务的阈值接入等级。再根据当前接收到的业务的接入等级判定该业务是否是低时延业务。例如，广播TWT推荐(broadcast TWT recommendation)字段的取值为第一值，STA可以判定当前接收到的业务的接入等级是否为AC_VO，若是，则判定当前接收到的业务为低时延业务。广播TWT推荐(broadcast TWT recommendation)字段的取值为第二值，STA可以判定当前接收到的业务的接入等级是否为AC_VO或AC_VI，若是，则判定当前接收到的业务为低时延业务。当STA确定当前接收到的业务不是本小区的低时延业务，则满足条件2)，STA判定受限的服务时间段结束。
广播TWT推荐(broadcast TWT recommendation)字段的取值与低时延业务的预设业务标识的对应关系可以为下述表2所示。
表2
Figure PCTCN2021142348-appb-000002
表2中，当广播TWT推荐(broadcast TWT recommendation)字段的取值为第一值时，第一值对应的低时延业务的预设业务标识为6和7；当广播TWT推荐(broadcast TWT  recommendation)字段的取值为第二值时，第二值对应的低时延业务的预设业务标识为4、5、6和7；当广播TWT推荐(broadcast TWT recommendation)字段的取值为第三值(如3)时，第三值对应的低时延业务的预设业务标识为第三值(如3)到7之间的值。可理解的，表2所示的广播TWT推荐(broadcast TWT recommendation)字段的取值与低时延业务的预设业务标识的对应关系仅是示例，在实际应用中，可以根据实际应用场景确定广播TWT推荐(broadcast TWT recommendation)字段的取值与低时延业务的预设业务标识的对应关系。本申请实施例对此不做限定。
若STA接收到的TWT元素中的广播TWT推荐(broadcast TWT recommendation)字段是索引值时，可以根据索引值确定该索引值对应的低时延业务的预设业务标识。再根据当前接收到的业务的业务标识判定该业务是否是低时延业务。例如，广播TWT推荐(broadcast TWT recommendation)字段的取值为第一值，STA可以判定当前接收到的业务的业务标识是否为6或7，若是，则判定当前接收到的业务为低时延业务；又例如，广播TWT推荐(broadcast TWT recommendation)字段的取值为第二值，STA可以判定当前接收到的业务的业务标识是否为4、5、6、7中的一个，若是，则判定当前接收到的业务为低时延业务；又例如，广播TWT推荐(broadcast TWT recommendation)字段的取值为第三值，STA可以判定当前接收到的业务的业务标识是否为第三值(如3)到7中的一个，若是，则判定当前接收到的业务为低时延业务。当STA确定当前接收到的业务不是本小区的低时延业务，则满足条件2)，STA判定受限的服务时间段结束。
在另一种可能的实现方式中，广播TWT推荐(broadcast TWT recommendation)字段中可以直接指示低时延业务的阈值接入等级或低时延业务的预设业务标识。具体的，当广播TWT推荐(broadcast TWT recommendation)字段的信息为AC_VO，可以表示AC_VO为低时延业务的阈值接入等级；当广播TWT推荐(broadcast TWT recommendation)字段的信息为AC_VO和AC_VI，可以表示AC_VO和AC_VI为低时延业务的阈值接入等级；或者，当广播TWT推荐(broadcast TWT recommendation)字段的信息为6和7时，可以表示6和7为低时延业务的预设业务标识；当广播TWT推荐(broadcast TWT recommendation)字段的信息为4、5、6和7时，可以表示4、5、6和7为低时延业务的预设业务标识；当广播TWT推荐(broadcast TWT recommendation)字段的信息为第三值(如3)时，可以表示第三值(如3)到7之间的值为低时延业务的预设业务标识。
若STA接收到的TWT元素中的广播TWT推荐(broadcast TWT recommendation)字段中的信息直接指示低时延业务的阈值接入等级或低时延业务的预设业务标识，则STA可以根据该字段中的信息确定低时延业务的阈值接入等级或低时延业务的预设业务标识。通过当前接收的业务的接入等级或业务标识与广播TWT推荐(broadcast TWT recommendation)字段中的信息，判定当前接收到的业务是否为低时延业务。当STA确定当前接收到的业务不是本小区的低时延业务，则满足条件2)，STA判定受限的服务时间段结束。
可以理解，低时延业务的阈值接入等级或低时延业务的预设业务标识也可以由如图6B所示的EHT操作元素中的阈值接入等级或预设业务标识字段确定，具体的实现方式可以参考上述TWT元素中的广播TWT推荐(broadcast TWT recommendation)字段确定的方式，为避免重复，在此不再赘述。
可选的，第六帧携带的TWT元素也可以新增一个低时延字段，低时延业务的阈值接入等级或低时延业务的预设业务标识由低时延字段确定。
请参阅图7，图7是本申请实施例提供的又一种TWT元素的帧结构示意图。如图7所示，该TWT元素可以包括元素标识(element ID)字段、长度(length)字段、控制(control)字段、TWT参数信息(TWT parameter information)字段。其中，控制(control)字段可以包括低时延(low latency)子字段。
低时延业务的阈值接入等级或低时延业务的预设业务标识可以由如图7所示的TWT元素确定：
在一种可能的实现方式中，低时延(low latency)字段可以通过索引的方式指示低时延业务的阈值接入等级或低时延业务的预设业务标识。具体的，低时延(low latency)字段的取值可以表示索引值，索引值可以与低时延业务的阈值接入等级或低时延业务的预设业务标识对应。具体的，低时延(low latency)字段通过索引值的方式指示低时延业务的阈值接入等级或低时延业务的预设业务标识。
低时延(low latency)字段的取值与低时延业务的阈值接入等级的对应关系可以为下述表3所示。
表3
Figure PCTCN2021142348-appb-000003
表3中，当低时延(low latency)字段的取值为第一值时，第一值对应的低时延业务的阈值接入等级为AC_VO；当低时延(low latency)字段的取值为第二值时，第二值对应的低时延业务的阈值接入等级为AC_VO和AC_VI。可理解的，表3所示的低时延(low latency)字段的取值与低时延业务的阈值接入等级的对应关系仅是示例，在实际应用中，可以根据实际应用场景确定低时延(low latency)字段的取值与低时延业务的阈值接入等级的对应关系。本申请实施例对此不做限定。
若STA接收到的TWT元素或EHT操作元素中的低时延(low latency)字段是索引值时，可以根据索引值确定该索引值对应的低时延业务的阈值接入等级。再根据当前接收到的业务的接入等级判定该业务是否是低时延业务。例如，低时延(low latency)字段的取值为第一值，STA可以判定当前接收到的业务的接入等级是否为AC_VO，若是，则判定当前接收到的业务为低时延业务。低时延(low latency)字段的取值为第二值，STA可以判定当前接收到的业务的接入等级是否为AC_VO或AC_VI，若是，则判定当前接收到的业务为低时延业务。当STA确定当前接收到的业务不是本小区的低时延业务，则满足条件2)，STA判定受限的服务时间段结束。
低时延(low latency)字段的取值与低时延业务的预设业务标识的对应关系可以为下述表4所示。
表4
Figure PCTCN2021142348-appb-000004
表4中，当低时延(low latency)字段的取值为第一值时，第一值对应的低时延业务的预设业务标识为6和7；当低时延(low latency)字段的取值为第二值时，第二值对应的低时延业务的预设业务标识为4、5、6和7。可理解的，表4所示的低时延(low latency)字段的取值与低时延业务的预设业务标识的对应关系仅是示例，在实际应用中，可以根据实际应用场景确定低时延(low latency)字段的取值与低时延业务的预设业务标识的对应关系。本申请实施例对此不做限定。
若STA接收到的TWT元素或EHT操作元素中的低时延(low latency)字段是索引值时，可以根据索引值确定该索引值对应的低时延业务的预设业务标识。再根据当前接收到的业务的业务标识判定该业务是否是低时延业务。例如，低时延(low latency)字段的取值为第一值，STA可以判定当前接收到的业务的业务标识是否为6或7，若是，则判定当前接收到的业务为低时延业务；又例如，低时延(low latency)字段的取值为第二值，STA可以判定当前接收到的业务的业务标识是否为4、5、6、7中的一个，若是，则判定当前接收到的业务为低时延业务。当STA确定当前接收到的业务不是本小区的低时延业务，则满足条件2)，STA判定受限的服务时间段结束。
在另一种可能的实现方式中，低时延(low latency)字段中可以直接指示低时延业务的阈值接入等级或低时延业务的预设业务标识。具体的，当低时延(low latency)字段的信息为AC_VO，可以表示AC_VO为低时延业务的阈值接入等级；当低时延(low latency)字段的信息为AC_VO和AC_VI，可以表示AC_VO和AC_VI为低时延业务的阈值接入等级；或者，当低时延(low latency)字段的信息为6和7时，可以表示6和7为低时延业务的预设业务标识；当低时延(low latency)字段的信息为4、5、6和7时，可以表示4、5、6和7为低时延业务的预设业务标识。
若STA接收到的TWT元素或EHT操作元素中的低时延(low latency)字段中的信息直接指示低时延业务的阈值接入等级或低时延业务的预设业务标识，则STA可以根据该字段中的信息确定低时延业务的阈值接入等级或低时延业务的预设业务标识。通过当前接收的业务的接入等级或业务标识与低时延(low latency)字段中的信息，判定当前接收到的业务是否为低时延业务。当STA确定当前接收到的业务不是本小区的低时延业务，则满足条件2)，STA判定受限的服务时间段结束。
可选的，该低时延字段的一个特殊值可以表示所建立的TWT不是用于低时延通信的，而是用于传统的TWT通信的。其他的值，则表示用于低时延通信，同时指示低时延通信对应的接入等级或业务标识。取值如下述表5所示。
表5
低时延(low latency)字段的取值 含义
0 Non-Low latency
1 AC_VO
2 AC_VO and AC_VI
… …
可理解的，表5所示的取值含义仅是示例，在实际应用中，可以根据实际应用场景确定取值含义。本申请实施例对此不做限定。
对于条件3)：
STA进入受限的服务时间段后，若收到本小区内的非低时延业务(即普通业务)通信的帧，则判定受限的服务时间段结束。
其中，本小区可以理解为是STA所在的BSS。STA可以提前获取到本小区的BSS color的值。STA可以根据收到的帧的物理层帧头或者MAC层帧头来判断所接受到的帧是否为本小区内的帧。具体的，可以通过物理层帧头中的BSS color字段来判断，若接收到的BSS color字段与本小区的BSS color的值相同，则判定接收到的帧为本小区内的帧；还可以通过MAC层帧头中的接收地址或发送地址字段来判断，若接收地址或发送地址字段的值与本小区的AP的MAC地址相同，则判定接收到的帧为本小区内的帧。
非低时延业务可以是业务的接入等级低于某些特定接入等级(非低时延业务的阈值接入等级)的业务，也可以是业务标识为某些特定标识(非低时延业务的预设业务标识)的业务。可以理解，非低时延业务可以是业务的接入等级所对应的优先级低于某些特定接入等级(非低时延业务的阈值接入等级)所对应的优先级的业务，也可以是业务标识为某些特定标识(非低时延业务的预设业务标识)的业务。非低时延业务的阈值接入等级或非低时延业务的预设业务标识可以是由AP发送给STA的，例如，携带在TWT元素或EHT操作元素中发送。非低时延业务的阈值接入等级或非低时延业务的预设业务标识也可以是标准规定的。可选的，业务标识可以是具体的业务标识名称，也可以是某一具体的值。
若非低时延业务的阈值接入等级或非低时延业务的预设业务标识是由AP发送给STA的，则STA可以接收AP发送的携带TWT元素或EHT操作元素的第四帧。第四帧可以是信标帧(beacon)，也可以是TWT响应帧。TWT元素的帧结构的示意图可以如图6A所示，EHT操作元素的帧结构的示意图可以如图6B所示。这里的TWT元素中的广播TWT推荐(broadcast TWT recommendation)字段或EHT操作元素中的阈值接入等级或预设业务标识字段可以用于指示非低时延业务的阈值接入等级或非低时延业务的预设业务标识，具体的实现方式可以参考上述条件2)中TWT元素中的广播TWT推荐(broadcast TWT recommendation)字段或EHT操作元素中的阈值接入等级或预设业务标识字段指示低时延业务的阈值接入等级或非低时延业务的预设业务标识的实现方式，为避免重复，在此不再赘述。如果STA接收到的当前业务的接入等级或业务标识是广播TWT推荐(broadcast TWT recommendation)字段指示的低时延业务的阈值接入等级或低时延业务的预设业务标识，则STA可以确定当前业务是非低时延业务。当STA判定当前业务为本小区的非低时延业务时，即满足条件3)，判定受限的服务时间段结束。
可选的，STA可以接收第六帧，由于第六帧携带的TWT元素或EHT操作元素指示低时 延业务的阈值接入等级或低时延业务的预设业务标识，则STA接收到当前业务时，可以判定当前业务的接入等级或业务标识是否为低时延业务的阈值接入等级或低时延业务的预设业务标识，若不是，则STA可以确定当前业务为非低时延业务。当STA判定当前业务为本小区的非低时延业务时，即满足条件3)，判定受限的服务时间段结束。
当第一条件包括条件2)时，AP需要向STA发送第三帧和第四帧，第三帧和第四帧可以是同一帧，其携带的TWT元素或EHT操作元素同时指示预设时间段以及非低时延业务的阈值接入等级或低时延业务的预设业务标识。或者，AP需要向STA发送第三帧和第六帧，第三帧和第六帧可以是同一帧，其携带的TWT元素或EHT操作元素同时指示预设时间段以及低时延业务的阈值接入等级或低时延业务的预设业务标识。
当第一条件包括条件3)时，AP需要向STA发送第四帧，则上述的第三帧和第四帧是不同的帧，第三帧携带的TWT元素或EHT操作元素用于指示预设时间段，第四帧携带的TWT元素或EHT操作元素用于指示非低时延业务的阈值接入等级或低时延业务的预设业务标识。或者，AP需要向STA发送第六帧，第三帧和第六帧是不同的帧，第三帧携带的TWT元素或EHT操作元素用于指示预设时间段，第六帧携带的TWT元素或EHT操作元素用于指示低时延业务的阈值接入等级或低时延业务的预设业务标识。
当受限的服务时间段到来时，STA正在进行的信道接入过程暂停，开始受限的服务时间段内的信道接入。当满足以上第一条件中的任意一个或多个条件时，STA判定受限的服务时间段结束。该受限的服务时间段结束之后，STA可以发起新的信道接入，或者继续进行受限的服务时间段之前暂停的信道接入。信道接入可以是基于载波监听多址接入/干扰避免(carrier sense multiple access/collision avoidance，CSMA/CA)或者增强型分布式信道接入(enhanced distributed channel access，EDCA)的信道接入过程。
可以理解，在以往的信道接入规则中，当STA收到AP发送的触发帧，发送数据帧之后，若STA后续采用EDCA接入方式进行信道接入时，需采用多用户(multi-user，MU)EDCA参数集进行信道竞争，这是因为STA已通过响应触发帧的方式进行了信道接入，需在后续的信道接入中采用较为保守的参数(即MU EDCA参数集)。在本申请实施例中，由于STA在受限的服务时间段中收到触发帧发送的数据帧是低时延业务的数据帧，不应影响低时延业务的信道接入机会。当STA在受限的服务时间段中收到AP发送的触发帧，发送数据帧之后，若STA后续需要采用EDCA接入方式进行信道接入时，可以不采用MU EDCA参数集，采用原始的EDCA参数集进行信道接入。
可以理解，由于STA必须在受限的服务时间段开始之前结束其正在进行的非低时延业务的通信，若STA在受限的服务时间段开始之前完成随机退避，但未在受限的服务时间段之前进行传输，那么在所述受限的服务时间段结束后，若站点后续需要采用EDCA接入方式进行信道接入时，所采用的EDCA参数与受限的服务时间段开始之前的随机退避中采用的EDCA参数相同。
图8是本申请实施例提供的另一种通信方法的流程示意图。以下以STA为例，说明该方法，但应理解，本方法不局限STA执行，AP也可以执行。本文所述的STA包括STA侧的各 种形态的装置/设备，AP包括AP侧的形态的各种装置/设备。如图8所示，该通信方法包括但不限于以下步骤。
S801、STA在受限的服务时间段到来之前获取TXOP。
STA可以在受限的服务时间段到来之前获取TXOP，TXOP传输的业务可以包括低时延业务、非低时延业务、例外业务等业务。
S802、如果满足第二条件，STA不在受限的服务时间段到来之前结束TXOP。
其中，第二条件包括以下任意一个或多个例外条件：
例外条件1)：TXOP用于传输第一业务的数据帧；
例外条件2)：TXOP内传输业务的传输时间小于或等于第一阈值；
例外条件3)：受限的服务时间段是用于D2D传输的时间段。
受限的服务时间段为一段时间，AP和STA在这段时间内仅用于服务低时延业务。可选的，该受限的服务时间段可以称为R-SP(restricted service period，R-SP)，也可以称为限制型TWT SP(restricted TWT SP)。可理解的，该受限的服务时间段还可以有其它名称，本申请实施例对此不作限定。
STA不在受限的服务时间段到来之前结束TXOP，可以理解为，STA无需在受限的服务时间段到来之前结束自己的TXOP，或者，STA在受限的服务时间段到来之前不结束TXOP，或者，STA在受限的服务时间段到来继续当前的业务传输。
可以理解，为了保证多个小区之间的受限的服务时间段互不影响，AP可以向其他的AP发送其自身的受限的服务时间段的参数值。其他AP在设置其自身的受限的服务时间段的参数值时，需保证多个AP之间的受限的服务时间段的时间段不重叠。
下面对第二条件分别进行详细说明，应理解，第二条件包括但不限于以上的三个例外条件。
对于例外条件1)：
若STA在受限的服务时间段到来之前获取到的TXOP是用来传输第一业务的数据帧，则STA不在受限的服务时间段到来之前结束该TXOP。
其中，第一业务可以是低时延业务，也可以是例外业务。
当第一业务是低时延业务时，具体的：
低时延业务可以是业务的接入等级高于或等于某些特定接入等级(低时延业务的阈值接入等级)的业务，或者是业务标识为某些特定标识(低时延业务的预设业务标识)的业务。可以理解，低时延业务可以是业务的接入等级所对应的优先级高于或等于某些特定接入等级(低时延业务的阈值接入等级)所对应的优先级的业务，也可以是业务标识为某些特定标识(低时延业务的预设业务标识)的业务。低时延业务的阈值接入等级或低时延业务的预设业务标识可以是由AP发送给STA的，例如，携带在TWT元素或EHT操作元素中发送。低时延业务的阈值接入等级或低时延业务的预设业务标识也可以是标准规定的。例如AC＝AC_VO或AC＝AC_VI；或者TID＝0或1。可选的，业务标识可以是具体的业务标识名称，也可以是某一具体的值。
低时延业务的阈值接入等级或低时延业务的预设业务标识是由AP发送给STA的，则 STA可以接收AP发送的携带TWT元素或EHT操作元素的第六帧。第六帧可以是信标帧(beacon)，也可以是TWT响应帧。
低时延业务的阈值接入等级或低时延业务的预设业务标识可以由如图6A所示的TWT元素中的广播TWT推荐(broadcast TWT recommendation)字段或如图6B所示的EHT操作元素中的阈值接入等级或预设业务标识字段确定，低时延业务的阈值接入等级或低时延业务的预设业务标识还可以由如图7所示的TWT元素中的低时延(low latency)字段确定。具体的实现方式可以参考上述条件2)中的具体描述，为避免重复，在此不再赘述。当STA在受限的服务时间段到来之前获取到的TXOP是用来传输低时延业务的数据帧时，则满足例外条件1)，STA不在受限的服务时间段到来之前结束该TXOP。
当第一业务是例外业务时，具体的：
例外业务可以是与低时延业务相同的业务，也可以是不同于低时延业务的业务。若例外业务是不同于低时延业务的业务，例外业务可以是业务的接入等级高于或等于例外业务的阈值接入等级的业务，或者是业务标识为例外业务的预设业务标识的业务。可以理解，例外业务可以是业务的接入等级所对应的优先级高于或等于例外业务的阈值接入等级的业务，也可以是业务标识为例外业务的预设业务标识的业务。例外业务的阈值接入等级或例外业务的预设业务标识可以是由AP发送给STA的，例如，携带在TWT元素或EHT操作元素中发送。例外业务的阈值接入等级或例外业务的预设业务标识也可以是标准规定的。可选的，业务标识可以是具体的业务标识名称，也可以是某一具体的值。
例外业务的阈值接入等级或例外业务的预设业务标识是由AP发送给STA的，则STA可以接收AP发送的携带TWT元素或EHT操作元素的第七帧。第七帧可以是信标帧(beacon)，也可以是TWT响应帧。
请参阅图9A，图9A是本申请实施例提供的又一种TWT元素的帧结构示意图。如图9A所示，该TWT元素可以包括元素标识(element ID)字段、长度(length)字段、控制(control)字段、TWT参数信息(TWT parameter information)字段。其中，TWT参数信息(TWT parameter information)字段可以包括请求类型(request type)子字段、目标唤醒时间(target wake time)子字段、标称最小TWT唤醒持续时间(nominal minimum TWT wake duration)子字段、TWT唤醒间隔小数部分(TWT wake interval mantissa)子字段和广播TWT信息(broadcast TWT Info)子字段。其中，广播TWT信息(broadcast TWT Info)子字段可以包括例外接入等级(或例外业务标识)(exception AC(or exception TID))子字段。
请参阅图9B，图9B是本申请实施例提供的又一种EHT操作元素的帧结构示意图。如图9B所示，该EHT操作元素可以包括例外接入等级(或例外业务标识)(exception AC(or exception TID))字段。
例外业务的阈值接入等级或例外业务的预设业务标识可以由图9A所示的TWT元素或图9B所示的EHT操作元素中的例外接入等级(或例外业务标识)(exception AC(or exception TID))字段确定。
当STA在受限的服务时间段到来之前获得的TXOP用来传输的数据帧对应的接入等级高于或等于例外接入等级(或例外业务标识)(exception AC(or exception TID))字段所指示的例外业务的阈值接入等级或例外业务的预设业务标识时，即满足例外条件1)，STA不 在受限的服务时间段到来之前结束自己的TXOP。
对于例外条件2)：
若STA在受限的服务时间段到来之前获取到TXOP，在该TXOP之内传输业务的传输时间小于或等于第一阈值时，则TA不在受限的服务时间段到来之前结束该TXOP。
其中，第一阈值可以是AP发送给STA的，例如，携带在TWT元素或EHT操作元素中。第一阈值也可以是标准规定的。例如，第一阈值可以是1ms(毫秒)、100us(微秒)等。
若预设时间段是由AP发送给STA的，则STA可以接收AP发送的携带TWT元素或EHT操作元素的第五帧。第五帧可以是信标帧(beacon)，也可以是TWT响应帧。其中，TWT元素或EHT操作元素中的某一字段可以指示该第一阈值。
对于例外条件3)：
受限的服务时间段可以是服务AP与STA之间低时延业务通信的时间段，也可以是D2D之间业务通信的时间段，D2D是STA与STA之间进行业务传输，D2D也可以称为对等网络(peer to peer)。当受限的服务时间段是用于D2D传输的时间段时，即满足例外条件3)，STA不在所述受限的服务时间段到来之前结束所述TXOP。
当满足第二条件中的一个或多个例外条件时，STA可以做以下行为的任意一个或多个行为：
行为一：STA可以忽略受限的服务时间段的存在。可以理解为，当受限的服务时间段到来时，STA可以不终止其当前TXOP的传输，直到该TXOP的传输完毕。可选的，该TXOP的传输可以结束于受限的服务时间段的开始时间之后；
行为二：当受限的服务时间段到来时，若在TXOP内传输业务的传输时间大于第二阈值，STA结束该TXOP。具体的，当受限的服务时间段到来时，STA仅可继续传输一段时间，但不能超过第二阈值。第二阈值可以是标准规定的某个值，也可以是由AP发送给STA的，例如，携带在TWT元素或EHT操作元素中发送的。
可选的，第二阈值可以等于第一阈值，即当TXOP的当前业务传输完毕，STA才结束该TXOP。
行为三：当受限的服务时间段到来时，STA在所述TXOP内继续传输至多一个PPDU。
可选的，当满足第二条件时，由于受限的服务时间段的一段时间被其他节点占用，AP可以向STA发送第八帧，第八帧用于指示延长受限的服务时间段。第八帧可以是EHT行动帧的一种。请参阅图10，图10是本申请实施例提供的另一种帧结构的示意图。如图10所示，该EHT行动帧可以包括帧控制(frame control)字段、时长(duration)字段、接收端地址(Receiver address，RA)字段、发送端地址(sending address，TA)字段、基本服务集标识(BSS ID)字段、序列控制(sequence control)字段、高吞吐率控制(HT control)字段、帧体(frame body)字段和帧校验序列(frame check sequence，FCS)字段。其中，帧体(frame body)字段包括类别(category)子字段、极高吞吐率行动(EHT action)子字段和额外受限服务阶段时长(extra restricted SP duration)子字段。其中，额外受限服务阶段时长(extra restricted SP duration)子字段的取值，可以用于表示受限的服务时间段的延长时长。例如，当额外受限服务阶段时长(extra restricted SP duration)子字段的取值为10时，可以用于表示受限的服务时间段延长10ms(毫秒)。
上述内容详细阐述了本申请提供的方法，为了便于更好地实施本申请实施例的上述方案，本申请实施例还提供了相应的装置。
本申请实施例可以根据上述方法示例对通信装置进行功能模块的划分，例如，可以对应各个功能划分各个功能模块，也可以将两个或两个以上的功能集成在一个处理模块中。上述集成的模块既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。需要说明的是，本申请实施例中对模块的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式。
在采用集成的单元的情况下，请参阅图11，图11是本申请实施例提供的一种第一通信装置的结构示意图。该第一通信装置可以为STA，也可以为STA中的模块(例如，芯片)。如图11所示，该第一通信装置1100，至少包括：处理单元1101和收发单元1102；其中：
处理单元1101，用于如果满足第一条件，判定受限的服务时间段结束，第一条件包括以下任意一个或多个：
接收到第一帧，第一帧用于指示结束受限的服务时间段；
在预设时间段内未接收到第二帧；
接收到本小区内的非低时延业务通信的帧，本小区为STA所在的BSS。
在一个实施例中，第一帧为EHT行动帧，EHT行动帧中的EHT行动字段指示结束受限的服务时间段。
在一个实施例中，该第一通信装置1100还包括：
收发单元1102，用于当第一条件包括在预设时间段内未接收到第二帧时，在STA判定受限的服务时间段结束之前，接收第三帧，第三帧携带TWT元素；预设时间段由TWT元素中的标称最小TWT唤醒持续时间字段和唤醒时间单位字段确定。
在一个实施例中，收发单元1102还可以用于：当第一条件包括接收到本小区内的非低时延业务通信的帧时，在STA判定受限的服务时间段结束之前，接收第四帧，第四帧携带TWT元素；
TWT元素中携带非低时延业务的阈值接入等级或者非低时延业务的预设业务标识，非低时延业务为业务的接入等级低于或等于非低时延业务的阈值接入等级的业务，或者，非低时延业务为业务标识为非低时延业务的预设业务标识的业务。
在一个实施例中，非低时延业务的阈值接入等级或者非低时延业务的预设业务标识由TWT元素中的广播TWT推荐字段确定。
在一个实施例中，处理单元1101还可以用于：判定受限的服务时间段结束后，发起新的信道接入，或者，继续进行受限的服务时间段之前暂停的信道接入。
有关上述处理单元1101和收发单元1102更详细的描述可以直接参考上述图3所示的方法实施例中STA的相关描述，这里不加赘述。
请参阅图12，图12是本申请实施例提供的一种第二通信装置的结构示意图。该第二通信装置可以为STA，也可以为STA中的模块(例如，芯片)。如图12所示，该第二通信装置1200，至少包括：处理单元1201和收发单元1202；其中：
处理单元1201，用于在受限的服务时间段到来之前获取TXOP；
处理单元1201，还用于如果满足第二条件，不在受限的服务时间段到来之前结束TXOP，第二条件包括以下任意一个或多个：
TXOP用于传输第一业务的数据帧；
TXOP内传输业务的传输时间小于或等于第一阈值；
受限的服务时间段是用于D2D传输的时间段。
在一个实施例中，该第二通信装置1200还包括：
收发单元1202，用于当第二条件包括TXOP内传输业务的传输时间小于或等于第一阈值时，不在受限的服务时间段到来之前结束TXOP之前，接收第五帧，第五帧携带TWT元素，TWT元素中携带有第一阈值。
在一个实施例中，第一业务为低时延业务；收发单元1202还可以用于：
当第二条件包括TXOP用于传输第一业务的数据帧时，不在受限的服务时间段到来之前结束TXOP之前，接收第六帧，第六帧携带TWT元素；TWT元素中携带低时延业务的阈值接入等级或者低时延业务的预设业务标识，低时延业务为业务的接入等级高于或等于低时延业务的阈值接入等级的业务，或者，低时延业务为业务标识为低时延业务的预设业务标识的业务。
在一个实施例中，低时延业务的阈值接入等级或者低时延业务的预设业务标识由TWT元素中的广播TWT推荐字段确定。
在一个实施例中，第一业务为例外业务；收发单元1202还用于：
当第二条件包括TXOP用于传输第一业务的数据帧时，不在受限的服务时间段到来之前结束TXOP之前，接收第七帧，第七帧携带TWT元素；TWT元素中携带例外业务的阈值接入等级或者例外业务的预设业务标识，例外业务为业务的接入等级高于或等于例外业务的阈值接入等级的业务，或者，例外业务为业务标识为例外业务的预设业务标识的业务。
在一个实施例中，例外业务的阈值接入等级或者例外业务的预设业务标识由TWT元素中的例外接入等级字段确定。
在一个实施例中，处理单元1201还可以用于：
当受限的服务时间段到来时，当TXOP内传输业务的传输时间大于第二阈值时，结束TXOP。
在一个实施例中，处理单元1201还可以用于：
当受限的服务时间段到来时，在TXOP内继续传输至多一个PPDU。
在一个实施例中，收发单元1202还可以用于：
接收第八帧，第八帧用于指示延长受限的服务时间段。
有关上述处理单元1201和收发单元1202更详细的描述可以直接参考上述图8所示的方法实施例中STA的相关描述，这里不加赘述。
以上介绍了本申请实施例的第一通信装置和第二通信装置，以下介绍所述应用于第一通信装置和所述应用于第二通信装置可能的产品形态。应理解，但凡具备上述图11所述的应用于第一通信装置的特征的任何形态的产品，和但凡具备上述图12所述的应用于第二通信装置的特征的任何形态的产品，都落入本申请的保护范围。还应理解，以下介绍仅为举 例，不限制本申请实施例的应用于第一通信装置的产品形态和应用于第二通信装置的产品形态仅限于此。
作为一种可能的产品形态，本申请实施例所述的第一通信装置和第二通信装置，可以由一般性的总线体系结构来实现。
第一通信装置，包括处理器。可选的，还包括与所述处理器内部连接通信的收发器。该处理器用于如果满足第一条件，判定受限的服务时间段结束，第一条件包括以下任意一个或多个：接收到第一帧，第一帧用于指示结束受限的服务时间段；在预设时间段内未接收到第二帧；接收到本小区内的非低时延业务通信的帧，本小区为STA所在的BSS。可选的，所述第一通信装置还可以包括存储器，所述存储器用于存储处理器执行的指令。
第二通信装置，包括处理器。可选的，还包括与所述处理器内部连接通信的收发器。该处理器用于在受限的服务时间段到来之前获取TXOP；该处理单元，还用于如果满足第二条件，不在受限的服务时间段到来之前结束TXOP，第二条件包括以下任意一个或多个：TXOP用于传输第一业务的数据帧；TXOP内传输业务的传输时间小于或等于第一阈值；受限的服务时间段是用于D2D传输的时间段。可选的，所述第二通信装置还可以包括存储器，所述存储器用于存储处理器执行的指令。
作为一种可能的产品形态，本申请实施例所述的第一通信装置和第二通信装置，可以由芯片来实现。
实现第一通信装置的芯片包括处理电路。可选的，还包括与所述处理电路内部连接通信的输出接口。所述处理电路用于如果满足第一条件，判定受限的服务时间段结束，第一条件包括以下任意一个或多个：接收到第一帧，第一帧用于指示结束受限的服务时间段；在预设时间段内未接收到第二帧；接收到本小区内的非低时延业务通信的帧，本小区为STA所在的BSS。可选的，该芯片还可以包括存储介质，所述存储介质用于存储处理电路执行的指令。
实现第二通信装置的芯片包括处理电路。可选的，还包括与所述处理电路内部连接通信的输出接口。所述处理电路用于在受限的服务时间段到来之前获取TXOP；该处理单元，还用于如果满足第二条件，不在受限的服务时间段到来之前结束TXOP，第二条件包括以下任意一个或多个：TXOP用于传输第一业务的数据帧；TXOP内传输业务的传输时间小于或等于第一阈值；受限的服务时间段是用于D2D传输的时间段。可选的，所述第二通信装置还可以包括存储器，所述存储器用于存储处理器执行的指令。可选的，该芯片还可以包括存储介质，所述存储介质用于存储处理电路执行的指令。
作为一种可能的产品形态，本申请实施例所述的第一通信装置和第二通信装置，还可以使用下述来实现：一个或多个FPGA(现场可编程门阵列)、PLD(可编程逻辑器件)、控制器、状态机、门逻辑、分立硬件部件、任何其它适合的电路、或者能够执行本申请通篇所描述的各种功能的电路的任意组合。
应理解，上述各种产品形态的第一通信装置和第二通信装置，分别具有上述方法实施例中第一通信装置和第二通信装置的任意功能，此处不再赘述。
本申请实施例还提供一种计算机可读存储介质，该计算机可读存储介质中存储有指令，当该指令在计算机上运行时，使得计算机执行前述任一实施例中的方法。
本申请实施例还提供一种计算机程序产品，当该计算机程序产品在计算机上运行时，使得计算机执行前述任一实施例中的方法。
本申请实施例还提供一种通信装置，该装置可以以芯片的产品形态存在，该装置的结构中包括处理器和接口电路，该处理器用于通过接收电路与其它装置通信，使得该装置执行前述任一实施例中的方法。
结合本申请公开内容所描述的方法或者算法的步骤可以硬件的方式来实现，也可以是由处理器执行软件指令的方式来实现。软件指令可以由相应的软件模块组成，软件模块可以被存放于随机存取存储器(Random Access Memory，RAM)、闪存、可擦除可编程只读存储器(Erasable Programmable ROM，EPROM)、电可擦可编程只读存储器(Electrically EPROM，EEPROM)、寄存器、硬盘、移动硬盘、只读光盘(CD-ROM)或者本领域熟知的任何其它形式的存储介质中。一种示例性的存储介质耦合至处理器，从而使处理器能够从该存储介质读取信息，且可向该存储介质写入信息。当然，存储介质也可以是处理器的组成部分。处理器和存储介质可以位于ASIC中。另外，该ASIC可以位于核心网接口设备中。当然，处理器和存储介质也可以作为分立组件存在于核心网接口设备中。
本领域技术人员应该可以意识到，在上述一个或多个示例中，本申请所描述的功能可以用硬件、软件、固件或它们的任意组合来实现。当使用软件实现时，可以将这些功能存储在计算机可读介质中或者作为计算机可读介质上的一个或多个指令或代码进行传输。计算机可读介质包括计算机可读存储介质和通信介质，其中通信介质包括便于从一个地方向另一个地方传送计算机程序的任何介质。存储介质可以是通用或专用计算机能够存取的任何可用介质。
以上所述的具体实施方式，对本申请的目的、技术方案和有益效果进行了进一步详细说明，所应理解的是，以上所述仅为本申请的具体实施方式而已，并不用于限定本申请的保护范围，凡在本申请的技术方案的基础之上，所做的任何修改、等同替换、改进等，均应包括在本申请的保护范围之内。

Claims (16)

  1. 一种通信方法，其特征在于，包括：
    如果满足第一条件，站点STA判定受限的服务时间段结束，所述第一条件包括以下任意一个或多个：
    接收到第一帧，所述第一帧用于指示结束所述受限的服务时间段；
    在预设时间段内未接收到第二帧；
    接收到本小区内的非低时延业务通信的帧，所述本小区为所述STA所在的基本服务集BSS。
  2. 根据权利要求1所述的方法，其特征在于，所述第一帧为极高吞吐率EHT行动帧，所述EHT行动帧中的EHT行动字段指示结束所述受限的服务时间段。
  3. 根据权利要求1或2所述的方法，其特征在于，当第一条件包括在预设时间段内未接收到第二帧时，在所述STA判定所述受限的服务时间段结束之前，所述方法还包括：
    所述STA接收第三帧，所述第三帧携带目标唤醒时间TWT元素；
    所述预设时间段由所述TWT元素中的标称最小TWT唤醒持续时间字段和唤醒时间单位字段确定。
  4. 根据权利要求1所述的方法，其特征在于，当第一条件包括接收到本小区内的非低时延业务通信的帧时，在所述STA判定所述受限的服务时间段结束之前，所述方法还包括：
    所述STA接收第四帧，所述第四帧携带目标唤醒时间TWT元素；
    所述TWT元素中携带非低时延业务的阈值接入等级或者非低时延业务的预设业务标识，所述非低时延业务为业务的接入等级低于或等于所述非低时延业务的阈值接入等级的业务，或者，所述非低时延业务为业务标识为所述非低时延业务的预设业务标识的业务。
  5. 根据权利要求4所述的方法，其特征在于，所述非低时延业务的阈值接入等级或者所述非低时延业务的预设业务标识由所述TWT元素中的广播TWT推荐字段确定。
  6. 根据权利要求1-5任意一项所述的方法，其特征在于，所述方法还包括：
    所述STA判定所述受限的服务时间段结束后，发起新的信道接入，或者，继续进行所述受限的服务时间段之前暂停的信道接入。
  7. 一种第一通信装置，其特征在于，所述装置应用于站点STA，包括：
    处理单元，用于如果满足第一条件，判定受限的服务时间段结束，所述第一条件包括以下任意一个或多个：
    接收到第一帧，所述第一帧用于指示结束所述受限的服务时间段；
    在预设时间段内未接收到第二帧；
    接收到本小区内的非低时延业务通信的帧，所述本小区为所述STA所在的基本服务集BSS。
  8. 根据权利要求7所述的装置，其特征在于，所述第一帧为极高吞吐率EHT行动帧，所述EHT行动帧中的EHT行动字段指示结束所述受限的服务时间段。
  9. 根据权利要求7或8所述的装置，其特征在于，所述装置还包括：
    收发单元，用于当第一条件包括在预设时间段内未接收到第二帧时，在所述STA判定所述受限的服务时间段结束之前，接收第三帧，所述第三帧携带目标唤醒时间TWT元素；
    所述预设时间段由所述TWT元素中的标称最小TWT唤醒持续时间字段和唤醒时间单位字段确定。
  10. 根据权利要求1所述的装置，其特征在于，所述收发单元，还用于：
    当第一条件包括接收到本小区内的非低时延业务通信的帧时，在所述STA判定所述受限的服务时间段结束之前，接收第四帧，所述第四帧携带目标唤醒时间TWT元素；
    所述TWT元素中携带非低时延业务的阈值接入等级或者非低时延业务的预设业务标识，所述非低时延业务为业务的接入等级低于或等于所述非低时延业务的阈值接入等级的业务，或者，所述非低时延业务为业务标识为所述非低时延业务的预设业务标识的业务。
  11. 根据权利要求10所述的装置，其特征在于，所述非低时延业务的阈值接入等级或者所述非低时延业务的预设业务标识由所述TWT元素中的广播TWT推荐字段确定。
  12. 根据权利要求7-11所述的装置，其特征在于，所述处理单元，还用于：
    判定所述受限的服务时间段结束后，发起新的信道接入，或者，继续进行所述受限的服务时间段之前暂停的信道接入。
  13. 一种第一通信装置，其特征在于，包括处理器，所述处理器用于如果满足第一条件，判定受限的服务时间段结束，所述第一条件包括以下任意一个或多个：
    接收到第一帧，所述第一帧用于指示结束所述受限的服务时间段；
    在预设时间段内未接收到第二帧；
    接收到本小区内的非低时延业务通信的帧，所述本小区为所述STA所在的基本服务集BSS。
  14. 一种第一通信装置，其特征在于，包括处理电路，所述处理电路用于如果满足第一条件，判定受限的服务时间段结束，所述第一条件包括以下任意一个或多个：
    接收到第一帧，所述第一帧用于指示结束所述受限的服务时间段；
    在预设时间段内未接收到第二帧；
    接收到本小区内的非低时延业务通信的帧，所述本小区为所述STA所在的基本服务集BSS。
  15. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质中存储有程序指令，当所述程序指令在计算机上运行时，使得所述计算机执行如权利要求1-6任一项所述的方法。
  16. 一种包含程序指令的计算机程序产品，当所述程序指令在计算机上运行时，使得所述计算机执行如权利要求1-6任一项所述的方法。
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