WO2023116352A1 - 基于目标唤醒时间的通信方法、装置及系统 - Google Patents

基于目标唤醒时间的通信方法、装置及系统 Download PDF

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Publication number
WO2023116352A1
WO2023116352A1 PCT/CN2022/134734 CN2022134734W WO2023116352A1 WO 2023116352 A1 WO2023116352 A1 WO 2023116352A1 CN 2022134734 W CN2022134734 W CN 2022134734W WO 2023116352 A1 WO2023116352 A1 WO 2023116352A1
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WIPO (PCT)
Prior art keywords
service
twt
information
field
restricted
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PCT/CN2022/134734
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English (en)
French (fr)
Inventor
郭宇宸
黄国刚
李云波
淦明
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华为技术有限公司
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Priority to EP22909667.2A priority Critical patent/EP4436303A1/en
Publication of WO2023116352A1 publication Critical patent/WO2023116352A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/11—Allocation or use of connection identifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/08—Upper layer protocols
    • H04W80/10—Upper layer protocols adapted for application session management, e.g. SIP [Session Initiation Protocol]
    • 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 embodiments of the present application relate to the field of wireless local area networks, and in particular to a communication method, device and system based on a target wake-up time.
  • wireless local area network wireless local area network
  • WiFi wireless fidelity
  • wireless video, voice, games, augmented reality (augmented reality, AR) and other applications have high requirements on communication delay.
  • TWT service period SP
  • TWT target wake time
  • the present application provides a communication method, device and system based on target wake-up time, which can improve service fairness, thereby improving service quality of low-latency services.
  • a target wake-up time-based communication is provided, and the method may be executed by an access point, or may be executed by a component of the access point, such as a processor, a chip, or a chip system of the access point, or the like. It can be realized by a logic module or software that can realize all or part of the functions of the access point.
  • the method includes:
  • the first radio frame includes first service identification information, and the first service identification information indicates at least one candidate service identification, and the service corresponding to the candidate service identification is a service that is allowed to be transmitted within the limited target wake-up time TWT service time.
  • the second radio frame includes second service identification information, the second service identification information indicates at least one request service identification, the service corresponding to the request service identification is the service that the first station requests to transmit within the limited TWT service time, and at least one request service The identification is a subset of at least one candidate service identification.
  • the third radio frame indicates that the first station is agreed to join the limited TWT protocol corresponding to the limited TWT service time.
  • the access point indicates the candidate service identifier corresponding to the service that is allowed to be transmitted in the restricted TWT SP.
  • the station selects one or more service identifiers from the candidate service identifiers indicated by the access point, and the service corresponding to the service identifier selected by the station is the service that the station requests to transmit in the restricted TWT SP.
  • the access point After the access point receives the request from the station, it can agree with the station to join the restricted TWT, so as to transmit the service corresponding to the service identifier selected by the station in the restricted TWT SP.
  • the services transmitted in the restricted TWT SP are limited by the access point, compared with the method in which the station determines the services transmitted in the restricted TWT SP, the station can be limited as much as possible in the restricted TWT SP.
  • the service can be transmitted freely in the limited TWT SP, so as to improve the service fairness between each site and improve the service quality of the low-latency service.
  • the method further includes: receiving a fourth wireless frame from the second station, where the fourth wireless frame includes request information, and the request information is used to request establishment of the restricted TWT protocol.
  • the station can request the access point to establish a restricted TWT protocol, and the access point can respond to the request to establish a restricted TWT protocol to the station, so that the station can transmit services in the restricted TWT SP, reducing Service transmission delay.
  • the fourth radio frame includes the second TWT information element, and the request information is carried in the first field of the second TWT information element.
  • the second TWT information element includes a broadcast TWT information field.
  • the first field is the broadcast TWT identification field in the broadcast TWT information field; or, the broadcast TWT information field includes a restricted service information existence field and a broadcast TWT identification field, and the first field is located in the restricted service information existence field and the broadcast TWT identification between fields.
  • the first field is a broadcast TWT identifier field
  • the request information is a preset broadcast TWT identifier.
  • a communication based on a target wake-up time is provided, and the method may be executed by the first site, or may be executed by components of the first site, such as a processor, a chip, or a chip system of the first site, or the like. It may be realized by a logic module or software capable of realizing all or part of the functions of the first station.
  • the method includes:
  • the first radio frame includes first service identification information, and the first service identification information indicates at least one candidate service identification, and the service corresponding to the candidate service identification is a service that is allowed to be transmitted within the limited target wake-up time TWT service time.
  • the second radio frame includes second service identification information, the second service identification information indicates at least one request service identification, the service corresponding to the request service identification is the service that the first station requests to transmit within the limited TWT service time, and at least one request service The identification is a subset of at least one candidate service identification.
  • the third radio frame indicates that the first station is agreed to join the limited TWT protocol corresponding to the limited TWT service time.
  • the access point indicates the candidate service identifier corresponding to the service that is allowed to be transmitted in the restricted TWT SP.
  • the station selects one or more service identifiers from the candidate service identifiers indicated by the access point, and the service corresponding to the service identifier selected by the station is the service that the station requests to transmit in the restricted TWT SP.
  • the access point After the access point receives the request from the station, it can agree with the station to join the restricted TWT, so as to transmit the service corresponding to the service identifier selected by the station in the restricted TWT SP.
  • the services transmitted in the restricted TWT SP are limited by the access point, compared with the method in which the station determines the services transmitted in the restricted TWT SP, the station can be limited as much as possible in the restricted TWT SP.
  • the service can be transmitted freely in the limited TWT SP, so as to improve the service fairness between each site and improve the service quality of the low-latency service.
  • the first service identifier information includes an uplink service identifier bitmap, and/or a downlink service identifier bitmap.
  • the uplink service identifier bitmap indicates an uplink service identifier in at least one candidate service identifier
  • the downlink service identifier bitmap indicates a downlink service identifier in at least one candidate service identifier.
  • the access point can indicate the uplink service ID and/or downlink service ID allowed to be used in the restricted TWT SP, and discuss the uplink service ID and downlink service ID separately, which can clearly and comprehensively discuss the restricted
  • the services transmitted in the TWT SP are controlled.
  • indicating the service identifier through the bitmap can reduce signaling overhead compared to the solution of explicitly carrying the service identifier in the first service identifier information.
  • the first radio frame includes a first TWT information element
  • the restricted TWT service information field in the first TWT information element includes a restricted TWT uplink service identifier bitmap field and restricted TWT downlink service identification bitmap field.
  • the uplink service identification bitmap is carried in the restricted TWT uplink service identification bitmap field
  • the downlink service identification bitmap is carried in the restricted TWT downlink service identification bitmap field.
  • the restricted TWT service information field includes a service control information field
  • the service control information field includes an uplink service identification bitmap effective field and a downlink service identification bitmap effective field .
  • the uplink service identifier bitmap valid field indicates whether the first service identifier information includes an uplink service identifier bitmap
  • the downlink service identifier bitmap valid field indicates whether the first service identifier information includes a downlink service identifier bitmap.
  • the service identifier bitmap valid field is used to indicate the type of the service identifier bitmap included in the first service identifier information, which helps the station to correctly parse the first TWT information element, so that the access point and The sites have a consistent understanding of the first TWT information element, improving communication efficiency.
  • the method further includes: transmitting at least one service corresponding to the requested service identifier within the limited TWT service time.
  • transmitting the service corresponding to the requested service identifier within the limited TWT service time can reduce the time delay of the service, thereby improving the service quality.
  • the method further includes: after at least one service transmission corresponding to the requested service identifier is completed, transmitting the first service within the limited TWT service time, at least one candidate The service identifier does not include the service identifier of the first service.
  • a target wake-up time-based communication is provided, and the method may be executed by an access point, or may be executed by a component of the access point, such as a processor, a chip, or a chip system of the access point, or the like. It can be realized by a logic module or software that can realize all or part of the functions of the access point.
  • the method includes receiving a first radio frame from a station and sending a second radio frame to the station.
  • the first wireless frame includes request information, and the request information is used for requesting establishment of a limited target wake-up time TWT protocol.
  • the second radio frame includes a first TWT information element, and the first TWT information element corresponds to a restricted TWT protocol.
  • the station can request to the access point to establish a restricted TWT protocol, and the access point can respond to the request and send the first TWT information element to the station, so that the station can transmit services in the restricted TWT SP, reducing the cost of the service. transmission delay.
  • the method further includes: broadcasting a third radio frame, where the third radio frame includes first service identification information, the first service identification information indicates at least one candidate service identification, and the service corresponding to the candidate service identification is allowed Services transmitted within the restricted TWT service time corresponding to the restricted TWT protocol.
  • the station can be restricted as much as possible to transmit the service in the limited TWT SP, thereby improving the communication between each station.
  • Business fairness improving the service quality of low-latency business.
  • a communication based on target wake-up time is provided.
  • the method can be executed by a station, or by a component of the station, such as a processor, a chip, or a chip system of the station, or by a person who can realize all or Logical modules or software implementations of some site functions.
  • the method includes sending a first wireless frame to an access point and receiving a second wireless frame from the access point.
  • the first wireless frame includes request information
  • the request information is used for requesting establishment of a limited target wake-up time TWT protocol.
  • the second radio frame includes a first TWT information element corresponding to a restricted TWT protocol.
  • the station can request to the access point to establish a restricted TWT protocol, and the access point can respond to the request and send the first TWT information element to the station, so that the station can transmit services in the restricted TWT SP, reducing the cost of the service. transmission delay.
  • the method further includes: receiving a third radio frame from the access point, where the third radio frame includes first service identifier information, where the first service identifier information indicates at least one candidate service identifier, and the candidate service identifier
  • the corresponding service is a service that is allowed to be transmitted within the limited TWT service time corresponding to the limited TWT protocol.
  • the station after receiving the third radio frame, the station can transmit the service corresponding to the candidate service identifier within the limited TWT service time, so as to improve the service quality of the service.
  • the first wireless frame further includes second service identification information
  • the second service identification information indicates at least one request service identification
  • the service corresponding to the request service identification is a station request
  • at least one candidate service identifier includes at least one request service identifier.
  • the station when the station requests the access point to establish the limited TWT protocol, it can carry the service identifier corresponding to the service it requests to transmit within the limited TWT service time, which is the access point’s permission for the TWT service time Provide a reference for the judgment of the transmitted business.
  • the first radio frame includes the second TWT information element, and the request information is carried in the first field of the second TWT information element.
  • the second TWT information element includes a broadcast TWT information field.
  • the first field is the broadcast TWT identification field in the broadcast TWT information field; or, the broadcast TWT information field includes a restricted service information existence field and a broadcast TWT identification field, and the first field is located in the restricted service information existence field and the broadcast TWT identification between fields.
  • the first field is a broadcast TWT identifier field
  • the request information is a preset broadcast TWT identifier.
  • a communication device for implementing the above various methods.
  • the communication device may be the access point in the first aspect or the third aspect, or a device included in the access point, such as a chip; or, the communication device may be the station in the second aspect or the fourth aspect, or a station Included devices, such as chips.
  • the communication device includes a corresponding module, unit, or means (means) for implementing the above method, and the module, unit, or means can be implemented by hardware, software, or by executing corresponding software on hardware.
  • the hardware or software includes one or more modules or units corresponding to the above functions.
  • the communication device may include a sending module and a receiving module. Further, the communication device may further include a processing module.
  • the sending module can be used to realize the functions of the sending class in any one of the above aspects and any possible design thereof.
  • the receiving module can be used to realize the functions of the receiving class in any one of the above aspects and any possible design thereof.
  • the processing module may be used to realize the processing functions in any of the above aspects and any possible designs thereof.
  • a communication device including: a processor and a memory; the memory is used to store computer instructions, and when the processor executes the instructions, the communication device executes the method described in any one of the above aspects.
  • the communication device may be the access point in the first aspect or the third aspect, or a device included in the access point, such as a chip; or, the communication device may be the station in the second aspect or the fourth aspect, or a station Included devices, such as chips.
  • a communication device including: a processor and a communication interface; the communication interface is used to communicate with modules other than the communication device; the processor is used to execute computer programs or instructions, so that the communication device Perform the method described in any one of the above aspects.
  • the communication device may be the access point in the first aspect or the third aspect, or a device included in the access point, such as a chip; or, the communication device may be the station in the second aspect or the fourth aspect, or a station Included devices, such as chips.
  • a communication device including: a logic circuit and an interface circuit; the interface circuit is used to input information and/or output information; the logic circuit is used to perform the method described in any one of the above aspects, according to the input Information for processing and/or generating output.
  • the communication device may be the access point in the first aspect or the third aspect, or a device included in the access point, such as a chip; or, the communication device may be the station in the second aspect or the fourth aspect, or a station Included devices, such as chips.
  • the input information includes: a second radio frame, where the second radio frame includes second service identification information, the second service identification information indicates at least one request service identification, and the service corresponding to the request service identification is the first A station requests services transmitted within the limited TWT service time, and at least one requested service identifier is a subset of at least one candidate service identifier.
  • processing according to the input information includes: sending a third wireless frame to the first station, where the third wireless frame indicates that the first station is allowed to join the restricted TWT protocol corresponding to the restricted TWT service time.
  • the input information includes: a fourth radio frame, where the fourth radio frame includes request information, where the request information is used to request establishment of a restricted TWT protocol.
  • processing according to the input information includes: sending a first radio frame, the first radio frame includes first service identification information, the first service identification information indicates at least one candidate service identification, and the service corresponding to the candidate service identification is allowed in Restricted target wake-up time TWT traffic transmitted within the service time.
  • the output information includes the first radio frame and the third radio frame.
  • the input information includes: a first radio frame, the first radio frame includes first service identification information, the first service identification information indicates at least one candidate service identification, and the service corresponding to the candidate service identification is a service that is allowed in Restricted target wake-up time TWT traffic transmitted within the service time.
  • processing according to the input information includes: sending a second radio frame, where the second radio frame includes second service identification information, the second service identification information indicates at least one request service identification, and the service corresponding to the request service identification is the first A station requests services transmitted within the limited TWT service time, and at least one requested service identifier is a subset of at least one candidate service identifier.
  • the input information includes a third radio frame, and the third radio frame indicates that the first station is allowed to join the restricted TWT protocol corresponding to the restricted TWT service time.
  • processing according to the input information includes: transmitting at least one service corresponding to the requested service identifier within the limited TWT service time.
  • the input information includes a first radio frame, and the first radio frame includes request information, and the request information is used to request establishment of a limited target wake-up time TWT protocol.
  • performing processing according to the input information includes: sending a second wireless frame to the station, where the second wireless frame includes a first TWT information element, and the first TWT information element corresponds to a restricted TWT protocol.
  • the output information includes the second radio frame and the third radio frame.
  • the third radio frame includes first service identification information, and the first service identification information indicates at least one candidate service identification, and the service corresponding to the candidate service identification is a service that is allowed to be transmitted within the limited TWT service time corresponding to the limited TWT protocol.
  • the output information includes a first wireless frame, and the first wireless frame includes request information, and the request information is used to request establishment of a limited target wake-up time TWT protocol.
  • the input information includes a second radio frame
  • the second radio frame includes a first TWT information element
  • the first TWT information element corresponds to a restricted TWT protocol
  • processing according to the second radio frame includes: transmitting services within the limited TWT service time.
  • a communication device including: an interface circuit and a processor, the interface circuit is a code/data read and write interface circuit, and the interface circuit is used to receive computer-executed instructions (computer-executed instructions are stored in a memory, possibly read directly from the memory, or possibly through other devices) and transmit to the processor; the processor is used to execute computer-executed instructions to enable the communication device to perform the method described in any aspect above.
  • the communication device may be the access point in the first aspect or the third aspect, or a device included in the access point, such as a chip; or, the communication device may be the station in the second aspect or the fourth aspect, or a station Included devices, such as chips.
  • a communication device including: at least one processor; the processor is configured to execute computer programs or instructions, so that the communication device executes the method described in any aspect above.
  • the communication device may be the access point in the first aspect or the third aspect, or a device included in the access point, such as a chip; or, the communication device may be the station in the second aspect or the fourth aspect, or a station Included devices, such as chips.
  • the communication device includes a memory for storing necessary computer programs or instructions.
  • the memory can be coupled to the processor, or it can be independent of the processor.
  • the communication device may be a chip or system-on-a-chip.
  • the system-on-a-chip may include a chip, or may include a chip and other discrete devices.
  • a computer-readable storage medium is provided, and a computer program or instruction is stored in the computer-readable storage medium, and when the computer program or instruction is executed by a processor, the method described in any one of the above-mentioned aspects be executed.
  • a computer program product is provided.
  • the computer program product is executed by a processor, the method described in any one of the above aspects is executed.
  • the above-mentioned sending action/function can be understood as output information
  • the above-mentioned receiving action/function can be understood as input information
  • the technical effects brought by any one of the design methods from the fifth aspect to the twelfth aspect can refer to the technical effects brought about by the different design methods in the first aspect or the second aspect or the third aspect or the fourth aspect , which will not be repeated here.
  • a thirteenth aspect provides a communication system, which includes the access point described in the first aspect and the first station described in the second aspect.
  • the communication system includes the access point described in the third aspect and the station described in the fourth aspect.
  • Fig. 1 is the schematic diagram of a kind of TWT SP provided by the present application.
  • FIG. 2 is a schematic structural diagram of a broadcast TWT element provided by the present application.
  • Fig. 3 is a structural schematic diagram 1 of a restricted TWT element provided by the present application.
  • FIG. 4 is a schematic structural diagram of a communication system provided by the present application.
  • FIG. 5 is a schematic structural diagram of a WLAN device provided by the present application.
  • FIG. 6 is a schematic flowchart of a communication method based on a target wake-up time provided by the present application
  • Fig. 7 is a structural schematic diagram II of a restricted TWT element provided by the present application.
  • Fig. 8 is a structural schematic diagram III of a restricted TWT element provided by the present application.
  • FIG. 9 is a schematic flowchart of another communication method based on the target wake-up time provided by the present application.
  • FIG. 10 is a structural schematic diagram 4 of a restricted TWT element provided by the present application.
  • Figure 11 is a schematic diagram of the fifth structure of a restricted TWT element provided by the present application.
  • FIG. 12 is a schematic flowchart of another communication method based on the target wake-up time provided by the present application.
  • FIG. 13 is a schematic flowchart of another communication method based on the target wake-up time provided by the present application.
  • FIG. 14 is a schematic structural diagram of an access point provided by the present application.
  • FIG. 15 is a schematic structural diagram of a site provided by the present application.
  • FIG. 16 is a schematic structural diagram of a communication device provided by the present application.
  • plural means two or more than two.
  • At least one of the following or similar expressions refer to any combination of these items, including any combination of single or plural items.
  • at least one item (piece) of a, b, or c can represent: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, c can be single or multiple .
  • words such as “first” and “second” are used to distinguish the same or similar items with basically the same function and effect. Those skilled in the art can understand that words such as “first” and “second” do not limit the quantity and execution order, and words such as “first” and “second” do not necessarily limit the difference.
  • words such as “exemplary” or “for example” are used as examples, illustrations or illustrations. Any embodiment or design scheme described as “exemplary” or “for example” in the embodiments of the present application shall not be interpreted as being more preferred or more advantageous than other embodiments or design schemes. To be precise, the use of words such as “exemplary” or “such as” is intended to present related concepts in a concrete manner for easy understanding.
  • references to "an embodiment” throughout the specification mean that a particular feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the present application. Therefore, various embodiments are not necessarily referring to the same embodiment throughout the specification. Furthermore, the particular features, structures or characteristics may be combined in any suitable manner in one or more embodiments. It can be understood that in various embodiments of the present application, the serial numbers of the processes do not mean the order of execution, and the execution order of the processes should be determined by their functions and internal logic, and should not be used in the embodiments of the present application. The implementation process constitutes no limitation.
  • target wake time target wake time, TWT
  • TWT is a mechanism for energy saving defined by WiFi6.
  • the access point station (access point station, AP STA) negotiates with the non-access point station (non-access point station, non-AP STA) to establish the TWT service period (service period, SP), that is, the TWT SP.
  • service period, SP service period
  • the terminal wakes up and remains active, and outside the TWT SP, the terminal remains dormant (sleep), so as to achieve the purpose of energy saving.
  • an access point station is described as an access point or an AP
  • a non-access point station is described as a station or STA.
  • the TWT service time may also be called the TWT service period, and the two can be replaced with each other without limitation.
  • unicast TWT (individual TWT):
  • a STA can establish a TWT agreement with the AP alone, therefore, the active time period (ie TWT SP) and sleep time period corresponding to different STAs can be different.
  • the TWT protocol and the TWT can be replaced with each other, establishing the TWT protocol can also be referred to as establishing the TWT, and joining the TWT protocol can also be referred to as joining the TWT.
  • a TWT requesting station (TWT Requesting STA, referred to as a requesting station) sends a TWT request message to a TWT responding station (TWT Responding STA, referred to as a responding station) for requesting to set a TWT SP.
  • TWT Requesting STA referred to as a requesting station
  • TWT Responding STA referred to as a responding station
  • the answering site After receiving the TWT request message, the answering site sends a TWT response message to the requesting site to inform the information of the TWT SP.
  • a TWT protocol is established between the requesting site and the responding site. When the TWT agreement is reached, both the requesting site and the responding site should remain active in the TWT SP to send and receive data. Outside of TWT SP, STA can sleep to achieve the purpose of energy saving.
  • each TWT protocol may include one or more periodically occurring TWT SPs of equal length.
  • broadcast TWT Broadcast TWT
  • Broadcast TWT provides a "batch management" mechanism.
  • AP can establish TWT protocol with multiple STAs.
  • the TWT protocol includes a series of TWT SPs that appear periodically. In the TWT SP, the multiple STAs remain active.
  • the AP may carry one or more broadcast TWT information in a beacon (Beacon) frame, and each broadcast TWT is represented by a broadcast TWT identifier and a medium access control (medium access control, MAC) address of the AP.
  • Beacon beacon
  • MAC medium access control
  • the STA After receiving the beacon frame, if the STA wants to join a certain broadcast TWT, it can send a broadcast TWT request message to the AP, and carry a broadcast TWT identifier (identifier, ID) (Broadcast TWT ID) in the broadcast TWT request message to the AP. Request to join the broadcast TWT corresponding to the broadcast TWT identifier.
  • ID broadcast TWT identifier
  • the broadcast TWT parameter set may indicate the period and duration of the TWT SP.
  • the life cycle of the broadcast TWT may also be included, indicating the duration of the broadcast TWT.
  • the life cycle of the broadcast TWT may be a beacon frame interval as a unit.
  • the broadcast TWT parameter set may be carried in a TWT information element (information element, IE).
  • IE information element
  • the TWT IE in the following embodiments of the present application can also be called a TWT element (TWT element), and the two can be replaced with each other.
  • TWT element TWT element
  • a format of a broadcast TWT element may be as shown in FIG. 2 .
  • the broadcast TWT element includes an element identifier (element identifier, element ID) field, a length (length) field, a control (control) field, and a TWT parameter information field.
  • element identifier element ID
  • length indicates the length of the TWT element
  • control field is used to carry TWT control information
  • length of the TWT parameter information field is variable and is used to carry TWT parameters.
  • control field may include an empty data PPDU (null data PPDU, NDP) paging indicator (NDP Paging Indicator) field, a responder power management (power management, PM) mode (Responder PM Mode) field, a negotiation type (Negotiation Type ) field, TWT Information Frame Disabled (TWT Information Frame Disabled) field, Wake Duration Unit (Wake Duration Unit) field, and reserved (reserved) field.
  • PPDU refers to a physical layer protocol data unit (physical protocol data unit, PPDU).
  • the TWT parameter information field may include a request type (Request Type) field, a target wake-up time (Target Wake Time) field, a nominal minimum TWT wake-up duration (Nominal Minimum TWT Wake Duration) field, a TWT wake-up interval fraction (TWT Wake Interval Mantissa) field, and broadcast TWT information (Broadcast TWT Info) field.
  • Request Type request type
  • Target Wake Time target wake-up time
  • Nominal Minimum TWT Wake Duration Nominal Minimum TWT Wake Duration
  • TWT wake-up interval fraction TWT Wake Interval Mantissa
  • broadcast TWT Info broadcast TWT information
  • the request type field can further include a TWT request (TWT Request) field, a TWT setup command (TWT Setup Command) field, a trigger (Trigger) field, a last broadcast parameter set (Last Broadcast Parameter Set) field, a flow type (Flow Type ) field, TWT Wake Interval Exponent (TWT Wake Interval Exponent) field, and reserved (Reserved) field.
  • TWT Request TWT Request
  • TWT setup command TWT Setup Command
  • Trigger Trigger
  • Last broadcast parameter set Last broadcast parameter set
  • Flow Type Flow Type
  • TWT Wake Interval Exponent TWT Wake Interval Exponent
  • reserved reserved
  • the broadcast TWT information field may further include a reserved (Reserved) field, a broadcast TWT identification (Broadcast TWT ID) field, and a broadcast TWT persistence (Broadcast TWT Persistence) field.
  • the negotiation Type field used to indicate whether the current TWT element is an individual TWT element or a broadcast TWT element. For example, when the Negotiation Type field is set to 0, the current TWT element is an individual TWT element; when the negotiation Type field is set to 2, the current TWT element is a broadcast TWT element.
  • TWT Request (TWT Request) field: used to indicate whether the current TWT element is sent by the AP or by the STA. It should be noted that when the current TWT element is the TWT element sent by the STA, it can be used for the STA to request to join a certain broadcast TWT SP.
  • Target Wake Time (Target Wake Time) field
  • Nominal Minimum TWT Wake Duration (Nominal Minimum TWT Wake Duration) field
  • TWT Wake Interval Decimal (TWT Wake Interval Mantissa) field respectively represent the start time, duration, and relative duration of TWT SP. Interval between adjacent TWT SPs.
  • the broadcast TWT ID (Broadcast TWT ID) field is used to uniquely identify a TWT.
  • a TWT is identified by the ⁇ Broadcast TWT ID, MAC Address> two-tuple, where MAC Address is the MAC address of the AP.
  • the restricted target wake-up time (restricted TWT, rTWT):
  • WLAN With the continuous upgrading of WLAN technology, more and more services require extremely low communication delay (referred to as low delay service).
  • WLAN divides service priorities. For example, in the channel competition access process, the device can use four different access categories (Access Category) to implement transmission priority division through different competition parameters.
  • Access Category access category
  • each access level may include two traffic identifiers (traffic identifier, TID) corresponding to two different services.
  • Restricted TWT is a special broadcast TWT, and its defined restricted TWT SP (rTWT SP) is used to serve low-latency services.
  • the AP can carry the TWT element in the beacon frame to declare the restricted TWT SP.
  • the structure of the TWT element corresponding to the restricted TWT may be shown in FIG. 3 .
  • the TWT element includes an element identifier (element identifier, element ID) field, a length (length) field, a control (control) field, and a TWT parameter information field.
  • the TWT parameter information field may include the Request Type field, the Target Wake Time field, the Nominal Minimum TWT Wake Duration field, and the TWT Wake Interval Mantissa field, broadcast TWT information (Broadcast TWT Info) field, and restricted TWT business information (Restricted TWT Traffic Info) field.
  • the request type field can further include a TWT request (TWT Request) field, a TWT setup command (TWT Setup Command) field, a trigger (Trigger) field, a last broadcast parameter set (Last Broadcast Parameter Set) field, a flow type (Flow Type ) field, Broadcast TWT Recommendation (Broadcast TWT Recommendation) field, TWT Wake Interval Exponent (TWT Wake Interval Exponent) field, and Reserved (Reserved) field.
  • TWT Request TWT Request
  • TWT setup command TWT Setup Command
  • Trigger Trigger
  • Last broadcast parameter set Last broadcast parameter set
  • Flow Type Broadcast TWT Recommendation
  • TWT Wake Interval Exponent TWT Wake Interval Exponent
  • Reserved Reserved
  • the broadcast TWT information field may further include a restricted service information existence (Restricted Traffic Info Present) field, a reserved (Reserved) field, a broadcast TWT identification (Broadcast TWT ID) field, and a broadcast TWT hold (Broadcast TWT Persistence) field .
  • a restricted service information existence (Restricted Traffic Info Present) field
  • a reserved (Reserved) field a broadcast TWT identification
  • Broadcast TWT hold Broadcast TWT Persistence
  • FIG. 3 the fields in FIG. 3 that are the same as those in FIG. 2 may have the same specific meanings and structures as those in FIG. 2 . Certainly, there may be other meanings and structures, which are not specifically limited in the present application.
  • the structure of the control field is the same as that in FIG. 2 as an example for illustration.
  • the value of the broadcast TWT recommendation field in the request type field in the TWT element can be set to 4, indicating that the current TWT is a restricted TWT.
  • the STA can send a request frame (such as a TWT setup frame) to the AP to request to join the restricted TWT in order to transmit low-latency services in the restricted TWT SP.
  • the present application provides a communication method based on the target wake-up time, in which the AP indicates the candidate service identifier that is allowed to be used in the restricted TWT SP.
  • the STA requests to join the restricted TWT, it selects one or more service identifiers from the candidate service identifiers indicated by the AP.
  • the service corresponding to the service identifier selected by the STA is the service that the STA requests to transmit in the restricted TWT SP; in other words , when the STA requests to join the restricted TWT, the identifier of the service transmitted in the restricted TWT SP requested by the STA can only be within the range of candidate service identifiers.
  • the AP After the AP receives the STA's request to join the restricted TWT, it can agree to the STA's joining the restricted TWT, so as to transmit the service corresponding to the service identifier selected by the STA in the restricted TWT SP.
  • the AP restricts the service identifier used when transmitting in the restricted TWT SP, which can limit the services transmitted by the STA in the restricted TWT SP, and prevent the STA from transmitting services at will in the restricted TWT. In this way, service fairness among various STAs is improved, and service quality of low-latency services is improved.
  • the embodiment of the present application can be applied to WLAN scenarios, and can be applied to IEEE 802.11 system standards, such as 802.11a/b/g standard, 802.11n standard, 802.11ac standard, 802.11ax standard, or its next generation, such as 802.11be standard, Also known as Wi-Fi7 or extremely high-throughput (EHT) standard or next-generation standard.
  • IEEE 802.11 system standards such as 802.11a/b/g standard, 802.11n standard, 802.11ac standard, 802.11ax standard, or its next generation, such as 802.11be standard, Also known as Wi-Fi7 or extremely high-throughput (EHT) standard or next-generation standard.
  • Wi-Fi7 Wi-Fi7
  • EHT extremely high-throughput
  • the embodiments of the present application may also be applicable to wireless local area network systems such as an Internet of Things (Internet of Things, IoT) network or a Vehicle to X (Vehicle to X, V2X) network.
  • IoT Internet
  • the embodiment of the present application can also be applicable to other possible communication systems, for example, long term evolution (long term evolution, LTE) system, LTE frequency division duplex (frequency division duplex, FDD) system, LTE time division duplex (time division) duplex, TDD), universal mobile telecommunications system (UMTS), global interconnection microwave access (worldwide interoperability for microwave access, WiMAX) communication system, and the future fifth generation (5th generation, 5G) communication system, etc. .
  • long term evolution long term evolution
  • LTE frequency division duplex frequency division duplex
  • FDD frequency division duplex
  • TDD time division duplex
  • UMTS universal mobile telecommunications system
  • WiMAX global interconnection microwave access
  • 5G fifth generation
  • the present application provides a WLAN communication system to which the embodiments of the present application are applicable, and the WLAN communication system includes an AP and an STA.
  • the STA involved in the embodiment of the present application may also be called a terminal, and the two may be replaced with each other, and the method provided in the present application does not specifically limit this.
  • FIG. 4 shows an architecture diagram of a WLAN communication system provided by the present application.
  • FIG. 4 takes the WLAN including an AP, STA1, STA2, STA3, STA4, and STA5 as an example.
  • the AP can schedule radio resources for its associated STAs and/or unassociated STAs, and transmit data for the STAs on the scheduled radio resources.
  • the AP can schedule wireless resources for STA1, STA2, STA3, STA4, and STA5, and transmit data for STA1, STA2, STA3, STA4, and STA5 on the scheduled wireless resources, including uplink data information and/or downlink data information.
  • the embodiment of the present application may be applicable to the communication between the AP and the STA.
  • the AP and STA in this embodiment of the present application may be wireless communication devices that support multiple links for parallel transmission.
  • MLD multi-link device
  • MBD multi-band device
  • the number of APs and STAs in FIG. 4 is only an example, and may be more or less.
  • the STA involved in this embodiment of the present application may be a wireless communication chip, a wireless sensor, or a wireless communication terminal.
  • a user terminal a user device, an access device, a subscriber station, a subscriber unit, a mobile station, a user agent, and a user equipment supporting a wireless fidelity (wireless fidelity, Wi-Fi) communication function
  • the user terminal may include various Handheld devices, in-vehicle devices, wearable devices, Internet of things (IoT) devices, computing devices or other processing devices connected to wireless modems, and various forms of user equipment (UE) with wireless communication capabilities , mobile station (mobile station, MS), terminal (terminal), terminal equipment (terminal equipment), portable communication device, handset, portable computing device, entertainment device, gaming device or system, GPS device or is configured to pass through Any other suitable equipment for network communication over a wireless medium, etc.
  • IoT Internet of things
  • UE user equipment
  • the STA can support 802.11be or 802.11be next-generation standards.
  • STA can also support multiple WLAN standards such as 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11a.
  • the AP involved in the embodiment of this application can be a device that is deployed in a wireless communication network to provide wireless communication functions for its associated STAs. It is mainly deployed in homes, buildings, and campuses, with a typical coverage radius of tens of meters to hundreds of meters. , of course, can also be deployed outdoors.
  • the AP is equivalent to a bridge connecting the wired network and the wireless network. Its main function is to connect various wireless network clients together, and then connect the wireless network to the Ethernet.
  • the AP can be a communication device such as a base station with a WiFi chip, a router, a gateway, a repeater, a communication server, a switch or a bridge, wherein the base station can include various forms of macro base stations, micro base stations, and relay stations.
  • the AP can support the 802.11be standard or the 802.11be next generation standard.
  • the AP can also support WLAN standards such as 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11a.
  • the AP and STA involved in this application may be collectively referred to as a WLAN device.
  • the WLAN device may adopt the composition structure shown in FIG. 5 , or include the components shown in FIG. 5 .
  • the WLAN device 500 may be a STA or a chip or a chip system (or system-on-a-chip) in an STA; it may also be an AP or an AP in an AP. chip or system-on-a-chip (or system-on-chip).
  • the system-on-a-chip may be composed of chips, or may include chips and other discrete devices.
  • the WLAN device 500 includes a processor 501 and a transceiver 502 . Further, the WLAN device 500 may further include a memory 504 . Wherein, the processor 501 , the memory 504 and the transceiver 502 may be connected through a communication line 503 .
  • the processor 501 may be a central processing unit (central processing unit, CPU), a general-purpose processor, a network processor (network processor, NP), a digital signal processor (digital signal processing, DSP), a microprocessor, a microprocessor Controller, programmable logic device (programmable logic device, PLD), or any combination thereof.
  • the processor 501 may also be other devices with processing functions, such as circuits, devices or software modules, which are not limited.
  • the processor 501 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 5 .
  • the WLAN device 500 may include multiple processors, for example, in addition to the processor 501 in FIG. 5 , it may also include other processors (not shown in FIG. 5 ).
  • the transceiver 502 is used for communicating with other devices or other communication networks.
  • the other communication network may be an Ethernet, a radio access network (radio access network, RAN), a WLAN, and the like.
  • the transceiver 502 may be a module, a circuit, a transceiver or any device capable of realizing communication.
  • the communication line 503 is used for transmitting information among the components included in the WLAN device 500 .
  • the memory 504 is used for storing instructions. Wherein, the instruction may be a computer program.
  • the memory 504 can be a read-only memory (read-only memory, ROM) or other types of static storage devices that can store static information and/or instructions, and can also be a random access memory (random access memory, RAM) or can store information and/or other types of dynamic storage devices for instructions, and can also be electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disc storage media or other magnetic storage devices, etc., without limitation.
  • EEPROM electrically erasable programmable read-only memory
  • CD-ROM compact disc read-only memory
  • optical disc storage including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.
  • the memory 504 may exist independently of the processor 501 or may be integrated with the processor 501 .
  • the memory 504 can be used to store instructions or program codes or some data, etc.
  • the memory 504 may be located in the WLAN device 500 or outside the WLAN device 500, without limitation.
  • the processor 501 may execute instructions stored in the memory 504, so as to implement the methods provided in the following embodiments of the present application.
  • the WLAN device 500 further includes an output device 505 and an input device 506 .
  • the input device 506 is a device such as a keyboard, a mouse, a microphone, or a joystick
  • the output device 505 is a device such as a display screen and a speaker (speaker).
  • composition structure shown in FIG. 5 does not constitute a limitation to the WLAN device, and the WLAN device may include more or less components than those shown in the figure, or a combination of certain components, or a different arrangement of components.
  • the executive body may perform some or all of the steps in the embodiments of the present application, these steps or operations are only examples, and the embodiments of the present application may also perform other operations or variations of various operations.
  • each step may be performed in a different order presented in the embodiment of the present application, and it may not be necessary to perform all operations in the embodiment of the present application.
  • a communication method based on the target wake-up time provided by the present application includes the following steps:
  • the access point sends a first wireless frame.
  • the first station receives the first wireless frame from the access point.
  • the first radio frame may be a beacon frame.
  • the access point sending the first wireless frame may include: the access point broadcasting the first wireless frame.
  • the first wireless frame may be received by multiple stations, and the first station may be any station that receives the first wireless frame. Other stations that receive the first wireless frame also implement the functions implemented by the first station in this application.
  • the first radio frame includes first service identification information.
  • the first service identifier information indicates at least one candidate service identifier, and the service corresponding to the candidate service identifier is a service that is allowed to be transmitted within the restricted TWT SP.
  • candidate service identifiers are service identifiers that are allowed to be used within the restricted TWT SP.
  • the at least one candidate service identifier may constitute a candidate service identifier set, that is, the first service identifier information may indicate the candidate service identifier set, and the candidate service identifier set includes at least one candidate service identifier.
  • the first service identifier information may include an uplink service identifier bitmap (Bitmap), and/or a downlink service identifier bitmap.
  • the uplink service identifier bitmap indicates the uplink service identifier in at least one candidate service identifier; the downlink service identifier bitmap indicates the downlink service identifier in the at least one candidate service identifier. It can be understood that the uplink service identifier is used to identify the uplink service, and the downlink service identifier is used to identify the downlink service.
  • the number of bits in the bitmap of uplink service identifiers may be equal to the total number of uplink service identifiers, each bit in the bitmap may correspond to an uplink service identifier, and when the value of a certain bit is an agreed value, it may indicate the The uplink service identifier corresponding to the bit.
  • the uplink service identifier bitmap may include 8 bits. Assume that the 8 bits correspond to service identifiers from 0 to 7 from left to right. If the agreed value is 1, then when the uplink service identifier bitmap is 00110100, it indicates the uplink service identifiers 2, 3, and 5, that is, the AP allows services Uplink services identified as 2, 3 and 5 are transmitted within the restricted TWT SP. For the realization of the downlink service identification bitmap, reference may be made to the description of the uplink service identification bitmap, which will not be repeated here.
  • the access point can indicate the uplink service ID and/or downlink service ID that are allowed to be used in the restricted TWT SP, and discuss the uplink service ID and downlink service ID separately, so that the restricted TWT SP can be clearly and comprehensively The services transmitted in the SP are controlled.
  • the first radio frame may include a first TWT information element, and the first TWT information element may be used to declare a restricted TWT.
  • the first TWT information element may include a restricted TWT service information field.
  • the restricted TWT service information field may include a restricted TWT uplink service identification bitmap (Restricted TWT UL TID Bitmap) field and a restricted downlink service identification bitmap (Restricted TWT DL TID Bitmap) field.
  • the uplink service identification bitmap may be carried in the restricted TWT uplink service identification bitmap field.
  • the downlink service identifier bitmap can be carried in the restricted TWT downlink service identifier bitmap field.
  • the restricted TWT service information field may also include a service information control (Traffic Info Control) field.
  • the access point may indicate the type of the bitmap specifically included in the first service identification information.
  • the service information control field may include an uplink service identification bitmap Valid (UL TID Bitmap Valid) field and downlink service identification valid (DL TID Bitmap Valid) field.
  • the uplink service identifier bitmap valid field may indicate whether the first service identifier information includes an uplink service identifier bitmap
  • the downlink service identifier valid field indicates whether the first service identifier information includes a downlink service identifier bitmap.
  • the valid field of the uplink service identifier bitmap when the valid field of the uplink service identifier bitmap has a value of the first value, it may indicate that the first service identifier information includes the uplink service identifier bitmap.
  • the value of the valid field of the uplink service identifier bitmap is the second value, it may indicate that the first service identifier information does not include the uplink service identifier bitmap.
  • the first value can be 1, and correspondingly, the second value is 0; or, the first value can be 0, and correspondingly, the second value is 1, which is not limited.
  • the valid field of the uplink service identification bitmap may also indicate whether the restricted TWT service information field includes the restricted TWT uplink service Identifies a bitmap field.
  • the valid field of the downlink service identification bitmap can also indicate whether the restricted TWT service information field includes the restricted TWT downlink service identification bitmap field .
  • the aforementioned first service identifier information may include a service identifier bitmap (Bitmap), which may be used to indicate an uplink service identifier in at least one candidate service identifier, or to indicate at least one The downlink service identifier in the candidate service identifier.
  • the service ID bitmap is used to indicate the ID of the uplink service or the ID of the downlink service, which may be default, or may be specified by other fields.
  • the effective field of the uplink service identification bitmap can be used to indicate that the service identification bitmap is an uplink service identification bitmap for indicating the uplink service identification
  • the effective field of the downlink service identification bitmap can be used to indicate that the service indication bitmap is for A downlink service identifier bitmap indicating the downlink service identifier.
  • a service identifier bitmap effective field to indicate whether the service identifier bitmap is used to indicate the uplink service identifier or the downlink service identifier, for example, when the value of the service identifier bitmap effective field is the first value, it can indicate the service identifier bitmap Used to indicate the uplink service identifier, or to indicate that the service identifier bitmap is an uplink service identifier bitmap; when the value of the effective field of the service identifier bitmap is the second value, it may indicate that the service identifier bitmap is used to indicate the downlink service identifier, or Said to indicate that the service identification bitmap is a downlink service identification bitmap.
  • the aforementioned first service identifier information may include a service identifier bitmap (Bitmap), which is used to simultaneously indicate the uplink and downlink service identifiers in at least one candidate service identifier.
  • Bitmap service identifier bitmap
  • the uplink service identifier and the downlink service identifier are indicated by a service identifier bitmap, it indicates that the uplink and downlink service identifiers are the same.
  • the service identifier bitmap including 8 bits as an example, assuming that the service identifiers corresponding to the 8 bits from left to right are 0 to 7, then when the uplink service identifier bitmap is 00110100, it means that the AP allows
  • the service identifiers of the uplink services transmitted in the TWT SP include 2, 3, and 5, and the service identifiers of the downlink services allowed to be transmitted in the restricted TWT SP include 2, 3, and 5.
  • the indication overhead of the service identifier bitmap can be saved.
  • the first station sends the second wireless frame to the access point.
  • the access point receives the second wireless frame from the first station.
  • the second radio frame includes second service identifier information
  • the second service identifier information indicates at least one requested service identifier.
  • the service corresponding to the requested service identifier is the service requested by the first station to be transmitted within the restricted TWT SP.
  • at least one requested service identifier is a subset of at least one candidate service identifier, or at least one requested service identifier belongs to at least one candidate service identifier, or at least one requested service identifier cannot include at least one candidate service identifier. (or nonexistent) business identifier.
  • the at least one request service identifier may constitute a request service identifier set, that is, the second service identifier information may indicate a request service identifier set, and the request service identifier set includes at least one request service identifier.
  • the set of requested service identifiers is a subset of the set of candidate service identifiers.
  • the candidate service identifiers indicated by the first service identifier information are 4, 5, 6, and 7, the requested service identifiers are a subset of 4-7, and cannot be other service identifiers other than 4-7.
  • at least one requested service identifier indicated by the second service identifier information may be 6, 7, or 5, 6, 7.
  • the second service identifier information may include an uplink service identifier bitmap, and/or a downlink service identifier bitmap.
  • the uplink service identifier bitmap indicates an uplink service identifier in at least one requested service identifier; the downlink service identifier bitmap indicates at least one downlink service identifier in a requested service. It can be understood that the uplink service identifier in the requesting service identifier is a subset of the uplink service identifiers in the candidate service identifiers, and the downlink service identifier in the requesting service identifier is a subset of the downlink service identifiers in the candidate service identifiers.
  • the second service identification information may be carried in the restricted TWT service information field of the TWT information element.
  • the restricted TWT service information field may also include a service control information field, and the service control information field may include two fields respectively used to indicate whether the second service identification information includes an uplink service identification bitmap, and whether the second service identification information includes Downlink service identification bitmap.
  • the second service identifier information may include a service identifier bitmap (Bitmap), and the service identifier bitmap may be used to indicate at least one uplink service identifier in the requested service identifier, or to indicate at least one requested service identifier. ID of the downlink service in ID.
  • the service ID bitmap is used to indicate the ID of the uplink service or the ID of the downlink service, which may be default, or may be specified by other fields. Reference may be made to the relevant description of the first service identification information in step S601, and details are not repeated here.
  • the second service identifier information may include a service identifier bitmap (Bitmap), which is used to simultaneously indicate the uplink service identifier and the downlink service identifier in at least one requested service identifier.
  • Bitmap service identifier bitmap
  • the uplink service identifier and the downlink service identifier are indicated by a service identifier bitmap, it indicates that the uplink and downlink service identifiers are the same. Reference may be made to the relevant description of the first service identification information in step S601, and details are not repeated here.
  • the second radio frame may be used to request to join the restricted TWT protocol announced by the access point.
  • it may be a TWT setup request (TWT setup request) frame, or may be a TWT setup frame (TWT setup frame), or may be a protected TWT setup frame (Protected TWT setup frame).
  • TWT setup request TWT setup request
  • TWT setup frame TWT setup frame
  • TWT setup frame TWT setup frame
  • Protected TWT setup frame Protected TWT setup frame
  • this application does not limit the corresponding relationship between service identifiers and specific services.
  • the access point allows the services corresponding to the candidate service identifiers to be transmitted within the restricted TWT SP.
  • the station Sure As for the specific service types corresponding to the candidate service identifiers, the station Sure.
  • the service types corresponding to the service identifiers 6 and 7 can be determined by the station.
  • the site can use service ID 6 to transmit video services, and service ID 7 to transmit AR services, that is, service ID 6 corresponds to video services, and service ID 7 corresponds to AR services.
  • the site can use service identifier 6 to transmit AR services, and service identifier 7 to transmit game services, that is, service identifier 6 corresponds to AR services, and service identifier 7 corresponds to game services.
  • the access point sends a third wireless frame to the first station.
  • the first station receives the third wireless frame from the access point.
  • the third radio frame indicates that the first station is allowed to join the restricted TWT protocol corresponding to the restricted TWT SP.
  • the third radio frame indicates that the first station is allowed to transmit at least one service corresponding to the requested service identifier in the restricted TWT SP.
  • the third radio frame may be a response to the second radio frame.
  • it may be a TWT setup response (TWT setup response) frame, or may be a TWT setup frame (TWT setup frame), or may be a protected TWT setup frame (Protected TWT setup frame).
  • TWT setup response TWT setup response
  • TWT setup frame TWT setup frame
  • protected TWT setup frame Protected TWT setup frame
  • the access point may first send an acknowledgment (acknowledgment, ACK) frame to the first station, to indicate that the access point successfully receives the second wireless frame.
  • ACK acknowledgment
  • the third radio frame may continue to be sent.
  • the first station may send an acknowledgment frame to the access point to indicate that the first station has successfully received the third radio frame.
  • the access point indicates the candidate service identifiers that are allowed to be used in the restricted TWT SP.
  • a station requests to join a restricted TWT, it selects one or more service identifiers from the candidate service identifiers indicated by the access point, and the service corresponding to the service identifier selected by the station is the service requested by the station to be transmitted in the restricted TWT SP .
  • the access point After the access point receives the request of the station to join the restricted TWT, it can agree to the station to join the restricted TWT, so as to transmit the service corresponding to the service identifier selected by the station in the restricted TWT SP. That is to say, in this application, the access point defines the service identifier used for transmission in the restricted TWT SP.
  • the station can be restricted as much as possible in the restricted TWT SP.
  • the service can be transmitted at will, so as to improve the service fairness between each site and improve the service quality of the low-latency service.
  • the station may indicate the service identifier when requesting to join the restricted TWT. Since the access point may not perceive which are the identifiers of low-latency services, the station may claim some non-low-latency service identifiers as the identifiers of low-latency services, and then transmit them in the restricted TWT SP . That is to say, a site may transmit services at will within the TWT SP, which is unfair to other sites. In addition, if all sites transmit freely within the restricted TWT SP, the delay of low-latency services cannot be guaranteed.
  • the access point restricts the services transmitted in the limited TWT SP or the service identifiers used, so that the random transmission of the site can be restricted, the fairness of services can be ensured, and the quality of service can be improved.
  • the communication method based on the target wake-up time shown in FIG. 6 may further include the following steps:
  • the access point and the first station transmit at least one service corresponding to the requested service identifier in the restricted TWT SP.
  • the transmission in step S604 may include receiving and/or sending.
  • step S604 may include: the first station sends the uplink service in the restricted TWT SP, and correspondingly, the access point receives the uplink service in the restricted TWT SP.
  • step S604 may include: the access point sends the downlink service in the restricted TWT SP, and correspondingly, the first station receives the downlink service in the restricted TWT SP.
  • the method may further include the following step S605:
  • the access point and the first station transmit the first service within the limited TWT service time.
  • at least one candidate service identifier includes the service identifier of the first service.
  • the service can be transmitted in the restricted TWT SP Businesses identified as other than 4-7 (for example, 2).
  • the above solution can be understood as a solution executed after the establishment of the limited TWT protocol is completed.
  • the present application also provides a communication method based on the target wake-up time, which is used to establish a restricted TWT protocol.
  • the station can request the access point to establish a restricted TWT to transmit services.
  • the communication method based on the target wake-up time includes the following steps:
  • a station sends a first wireless frame to an access point.
  • the access point receives the first wireless frame from the station.
  • the first radio frame includes request information, and the request information is used for requesting establishment of a restricted TWT protocol.
  • the access point sends the second wireless frame to the station.
  • the station receives the second wireless frame from the access point.
  • the second radio frame includes the first TWT information element, and the first TWT information element corresponds to the restricted TWT protocol.
  • the first TWT information element indicates a parameter of the restricted TWT protocol, and the parameter is used to indicate a restricted TWT SP.
  • the access point sends the second wireless frame to the station
  • this site has joined the newly established restricted TWT protocol. That is to say, after receiving the second radio frame, the station does not need to send a message to the access point to request to join the newly established restricted TWT protocol, and can transmit services in the restricted TWT SP.
  • the first radio frame may include the second TWT information element.
  • the station may set the broadcast TWT recommendation field included in the request type field in the second TWT information element to 4, indicating a restricted TWT.
  • setting the negotiation type field included in the control field in the second TWT information element to 3 indicates a request to join the TWT protocol.
  • the request information may be carried in the first field of the second TWT information element.
  • the first field may broadcast the broadcast TWT identification field in the TWT information field.
  • the request information may be a preset broadcast TWT identifier.
  • the preset broadcast TWT identifier may be predefined by the protocol. Or, it may be sent by the access point to the station in advance. Or, it may be negotiated between the access point and the station, without limitation.
  • the preset broadcast TWT identifier may be 0 or 31, or other values, which are not specifically limited in this application.
  • the broadcast TWT identification field may also have other names, for example, the "New TWT Request (New TWT Request)" field, which is not specifically limited in this application.
  • the broadcast TWT information field includes a restricted service information existence field and a broadcast TWT identification field, and the first field is located between the restricted service information existence field and the broadcast TWT identification field .
  • the bits occupied by the first field may be part of the reserved field shown in Figure 3, that is, the size of the reserved field in the broadcast TWT information field in Figure 11 is smaller than the reserved field shown in Figure 3 the size of.
  • the first field may also be called the “New TWT Request (New TWT Request)” field, or the “New Restricted TWT Request (New Restricted TWT Request)” field.
  • the first field may also have other names, which are not limited.
  • the structure of the first TWT information element may refer to FIG. 3 .
  • the arrival time of the TWW SP can be indicated by the target wake-up time field
  • the duration of the TWT SP can be indicated by the nominal minimum TWT wake-up duration field
  • the interval between two TWT SPs can be indicated by the TWT wake-up interval decimal field and the TWT wake-up interval index field. interval.
  • the broadcast TWT identifier in the broadcast TWT identifier field in the first TWT information element may be different from the aforementioned preset broadcast TWT identifier. That is to say, the broadcast TWT identifier of the finally established restricted TWT is determined by the broadcast TWT identifier field in the first TWT information element.
  • the station can request to the access point to establish a restricted TWT protocol, and the access point can respond to the request and send the first TWT information element to the station, so that the station can transmit services in the restricted TWT SP, reducing the cost of the service. transmission delay.
  • FIG. 6 and FIG. 9 can be combined with each other to form a new embodiment.
  • the new embodiment can be shown in FIG. 12 .
  • the new embodiment may be shown in FIG. 13 .
  • the communication method includes:
  • S1201-S1203 are the same as the above-mentioned steps S601-S603, and reference may be made to relevant descriptions of the above-mentioned steps S601-S603, and details are not repeated here.
  • the communication method based on the target wake-up time may further include:
  • the second station sends a fourth wireless frame to the access point.
  • the access point receives the fourth wireless frame from the second station.
  • the fourth radio frame includes request information, and the request information is used for requesting establishment of the restricted TWT protocol described in step S1203.
  • the access point may agree to the request, that is, perform step S1201.
  • the second site and the first site may be different sites.
  • the access point may also send a fifth wireless frame to the second station, and the fifth wireless frame may carry the first TWT information element described in step S601, so as to send the first TWT information element to the second station.
  • Two stations indicate restricted TWT SP.
  • the second site and the first site may be the same site.
  • the access point may send the first wireless frame without sending the fifth wireless frame to the first station.
  • the fourth radio frame may include a second TWT information element, and the request information may be carried in the first field of the second TWT information element.
  • the request information may be carried in the first field of the second TWT information element.
  • the communication method based on the target wake-up time may further include:
  • S1204-S1205 are the same as the above-mentioned steps S604-S605, and reference may be made to relevant descriptions of the above-mentioned steps S604-S605, which will not be repeated here.
  • the communication method includes:
  • S1301-S1302 are the same as the above-mentioned steps S901-S902, and reference may be made to relevant descriptions of the above-mentioned steps S901-S902, which will not be repeated here.
  • the method may further include:
  • the access point broadcasts the third wireless frame.
  • the station may receive the third wireless frame from the access point.
  • the third radio frame includes a Restricted TWT IE for declaring a newly created restricted TWT.
  • the structure of the restricted TWT IE can refer to FIG. 3 , which will not be repeated here.
  • the restricted TWT is a broadcast TWT
  • more stations can join the restricted TWT by broadcasting the third radio frame, thereby improving the utilization rate of the restricted TWT SP and resource utilization.
  • the third radio frame includes the first service identifier information.
  • the first service identifier information indicates at least one candidate service identifier, and the service corresponding to the candidate service identifier is a service that is allowed to be transmitted in the restricted TWT SP corresponding to the restricted TWT protocol.
  • the first service identifier information reference may be made to the relevant description in the above step S601, and details are not repeated here.
  • the first wireless frame sent by the station to the access point may include second service identifier information, and the second service identifier information indicates at least one requested service identifier.
  • the service corresponding to the requested service identifier is the service requested by the station to be transmitted within the restricted TWT SP.
  • the at least one candidate service identifier includes at least one request service identifier.
  • At least one requested service identifier indicated by the second service identifier information may be 6 and 7, then at least one candidate service identifier indicated by the first service identifier information is 4-7.
  • the station that sends the request information to the access point in step S1301 after the station that sends the request information to the access point in step S1301 receives the third wireless frame, it can also transmit the second service identification information in the restricted TWT SP that is not indicated, However, it is the service corresponding to the identifier of the candidate service identifier.
  • the station taking at least one requested service identifier indicated by the second service identifier information as 6 and 7, and at least one candidate service identifier indicated by the first service identifier information as 4-7 as an example, the station can also The services identified as 4 and/or 5 are transmitted within the SP.
  • the station that does not request to establish a limited TWT SP can perform the actions of the first station in the embodiment shown in Figure 6 , to join the restricted TWT, and transmit the services allowed by the access point in the restricted TWT SP.
  • FIG. 12 and FIG. 13 are only exemplary illustrations of the combination of FIG. 6 and FIG. 9 , and of course there may be other combinations, which are not specifically limited in the present application.
  • the method and/or steps implemented by the access point may also be implemented by a component (such as a chip or circuit) that can be used for the access point; the method and/or steps implemented by the station
  • the steps may also be implemented with components (such as chips or circuits) available at the site.
  • the present application also provides a communication device, which is used to implement the above various methods.
  • the communication device may be the access point in the above method embodiment, or a device including the above access point, or a component that can be used for the access point; or, the communication device may be the station in the above method embodiment, or An apparatus comprising the above-mentioned site, or being a part usable for the site.
  • the communication device includes hardware structures and/or software modules corresponding to each function.
  • the present application can be implemented in the form of hardware or a combination of hardware and computer software in combination with the units and algorithm steps of each example described in the embodiments disclosed herein. Whether a certain function is executed by hardware or computer software drives hardware depends on the specific application and design constraints of the technical solution. Skilled artisans may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present application.
  • the embodiment of the present application can divide the communication device into functional modules according to the above method embodiments.
  • each functional module can be divided corresponding to each function, or two or more functions can be integrated into one processing module.
  • the above-mentioned integrated modules can be implemented in the form of hardware or in the form of software function modules. It should be noted that the division of modules in the embodiment of the present application is schematic, and is only a logical function division, and there may be other division methods in actual implementation.
  • FIG. 14 shows a schematic structural diagram of an access point 140 .
  • the access point 140 includes a sending module 1401 and a receiving module 1402 .
  • the sending module 1401 and the receiving module 1402 may be collectively referred to as a transceiver module.
  • the sending module 1401 may also be called a sending unit.
  • the sending module 1401 may include a sending circuit, a transmitter, a transmitter or a communication interface.
  • the receiving module 1402 may also be called a receiving unit.
  • the receiving module 1402 may include a receiving circuit, a receiver, a receiver or a communication interface.
  • the access point 140 may further include a processing module 1403 . Further, the access point 140 may also include a storage module (not shown in FIG. 14 ), configured to store computer programs or instructions.
  • the sending module 1401 is configured to send a first radio frame, where the first radio frame includes first service identification information, the first service identification information indicates at least one candidate service identification, and the service corresponding to the candidate service identification is allowed to wake up at a limited target time Services transmitted during TWT service time;
  • the receiving module 1402 is configured to receive a second radio frame from the first station, the second radio frame includes second service identification information, the second service identification information indicates at least one request service identification, and the service corresponding to the request service identification is requested by the first site
  • at least one requesting service identifier is a subset of at least one candidate service identifier
  • the sending module 1401 is further configured to send a third wireless frame to the first station, where the third wireless frame indicates that the first station is allowed to join the restricted TWT protocol corresponding to the restricted TWT service time.
  • the receiving module 1402 is further configured to receive a fourth wireless frame from the second station, where the fourth wireless frame includes request information, and the request information is used to request establishment of the restricted TWT protocol.
  • the receiving module 1402 is configured to receive a first wireless frame from a station, where the first wireless frame includes request information, and the request information is used to request establishment of a limited target wake-up time TWT protocol;
  • the sending module 1401 is configured to send a second wireless frame to the station, where the second wireless frame includes a first TWT information element, and the first TWT information element corresponds to a restricted TWT protocol.
  • the sending module 1401 is further configured to broadcast a third radio frame, where the third radio frame includes first service identifier information, and the first service identifier information indicates at least one candidate service identifier, and the service corresponding to the candidate service identifier is allowed The service transmitted within the limited TWT service time corresponding to the limited TWT protocol.
  • the access point 140 is presented in the form of dividing various functional modules in an integrated manner.
  • Module here may refer to a specific application-specific integrated circuit (ASIC), circuit, processor and memory that execute one or more software or firmware programs, integrated logic circuits, and/or other functions that can provide the above functions device.
  • ASIC application-specific integrated circuit
  • the access point 140 may take the form of the WLAN device 500 shown in FIG. 5 .
  • the function/implementation process of the processing module 1403 in FIG. 14 can be implemented by the processor 501 in the WLAN device 500 shown in FIG.
  • the functions/implementation process of 1402 and the sending module 1401 may be implemented by the transceiver 502 in the WLAN device 500 shown in FIG. 5 .
  • the functions/implementation process of the receiving module 1402 and the sending module 1401 can be realized through the input and output interface (or communication interface) of the chip or the chip system
  • the function/implementation process of the processing module 1403 may be implemented by a chip or a processor (or processing circuit) of a chip system.
  • the access point 140 provided in this embodiment can execute the above method, the technical effect it can obtain can refer to the above method embodiment, and details are not repeated here.
  • FIG. 15 shows a schematic structural diagram of a station 150 .
  • the station 150 includes a sending module 1501 and a receiving module 1502 .
  • the sending module 1501 and the receiving module 1502 may be collectively referred to as a transceiver module.
  • the sending module 1501 may also be called a sending unit.
  • the sending module 1501 may include a sending circuit, a transmitter, a transmitter or a communication interface.
  • the receiving module 1502 may also be called a receiving unit.
  • the receiving module 1502 may include a receiving circuit, a receiver, a receiver or a communication interface.
  • the site 150 may also include a processing module 1503 . Further, the site 150 may also include a storage module (not shown in FIG. 15 ) for storing computer programs or instructions.
  • the sending module 1501 can be used to execute the steps of the sending class performed by the station in the above method embodiment, and/or other processes used to support the technology described herein;
  • the receiving module 1502 can be used to execute the above method implementation In the example, the steps of the receiving class executed by the station, and/or other processes for supporting the technology described herein;
  • the processing module 1503 can be used to execute the processing class (such as generating, determining, etc.) executed by the station in the above method embodiment etc.), and/or other processes used to support the techniques described herein.
  • the receiving module 1502 is configured to receive a first wireless frame from the access point, the first wireless frame includes first service identification information, the first service identification information indicates at least one candidate service identification, and the service corresponding to the candidate service identification is allowed The business transmitted within the limited target wake-up time TWT service time;
  • the sending module 1501 is configured to send a second wireless frame to the access point, where the second wireless frame includes second service identification information, the second service identification information indicates at least one request service identification, and the service corresponding to the request service identification is request limited For services transmitted within the TWT service time, at least one requested service identifier is a subset of at least one candidate service identifier;
  • the receiving module 1502 is further configured to receive a third wireless frame from the access point, where the third wireless frame indicates agreeing to join the restricted TWT protocol corresponding to the restricted TWT service time.
  • a sending module 1501 configured to send a first wireless frame to an access point, where the first wireless frame includes request information, and the request information is used to request establishment of a limited target wake-up time TWT protocol;
  • the receiving module 1502 is configured to receive a second wireless frame from the access point, where the second wireless frame includes a first TWT information element, and the first TWT information element corresponds to a restricted TWT protocol.
  • the receiving module 1502 is further configured to receive a third radio frame from the access point, where the third radio frame includes first service identifier information, the first service identifier information indicates at least one candidate service identifier, and the candidate service identifier corresponds to
  • the service is a service that is allowed to be transmitted within the limited TWT service time corresponding to the limited TWT protocol.
  • the site 150 is presented in the form of dividing various functional modules in an integrated manner.
  • Module here may refer to a specific application-specific integrated circuit (ASIC), circuit, processor and memory that execute one or more software or firmware programs, integrated logic circuits, and/or other functions that can provide the above functions device.
  • ASIC application-specific integrated circuit
  • the station 150 may take the form of the WLAN device 500 shown in FIG. 5 .
  • the function/implementation process of the processing module 1503 in FIG. 15 can be realized by the processor 501 in the WLAN device 500 shown in FIG.
  • the functions/implementation process of 1502 and the sending module 1501 can be implemented by the transceiver 502 in the WLAN device 500 shown in FIG. 5 .
  • the functions/implementation process of the receiving module 1502 and the sending module 1501 can be realized through the input and output interface (or communication interface) of the chip or the chip system, and the processing The function/implementation process of the module 1503 may be implemented by a chip or a processor (or processing circuit) of a chip system.
  • the station 150 provided in this embodiment can execute the above-mentioned method, the technical effect it can obtain can refer to the above-mentioned method embodiment, and details are not repeated here.
  • the embodiments of the present application further provide a communication device, where the communication device includes a processor, configured to implement the method in any one of the foregoing method embodiments.
  • the communication device further includes a memory.
  • the memory is used to store necessary computer programs or instructions, and the processor can invoke the computer programs or instructions stored in the memory to instruct the communication device to execute the method in any of the above method embodiments.
  • the memory may not be in the communication device.
  • the communication device further includes an interface circuit, the interface circuit is a code/data read and write interface circuit, and the interface circuit is used to receive computer-executed instructions (computer-executed instructions are stored in the memory, and may be directly read from memory read, or possibly through other devices) and transferred to the processor.
  • the interface circuit is a code/data read and write interface circuit, and the interface circuit is used to receive computer-executed instructions (computer-executed instructions are stored in the memory, and may be directly read from memory read, or possibly through other devices) and transferred to the processor.
  • the communication device further includes a communication interface, where the communication interface is used to communicate with modules other than the communication device.
  • the communication device may be a chip or a system-on-a-chip.
  • the system-on-a-chip may include a chip, or may include a chip and other discrete devices, which is not specifically limited in this embodiment of the present application.
  • the embodiment of the present application also provides a communication device, the communication device includes an interface circuit and a logic circuit, the interface circuit is used to input information and/or output information; the logic circuit is used to perform any of the above In a method embodiment, the method performs processing and/or generates output information according to input information.
  • the input information includes: a second radio frame, where the second radio frame includes second service identification information, the second service identification information indicates at least one request service identification, and the service corresponding to the request service identification is the first station requesting the For services transmitted within the limited TWT service time, at least one requesting service identifier is a subset of at least one candidate service identifier.
  • processing according to the input information includes: sending a third wireless frame to the first station, where the third wireless frame indicates that the first station is allowed to join the restricted TWT protocol corresponding to the restricted TWT service time.
  • the input information includes: a fourth wireless frame, where the fourth wireless frame includes request information, and the request information is used to request establishment of a restricted TWT protocol.
  • processing according to the input information includes: sending a first radio frame, the first radio frame includes first service identification information, the first service identification information indicates at least one candidate service identification, and the service corresponding to the candidate service identification is allowed in Restricted target wake-up time TWT traffic transmitted within the service time.
  • the output information includes the first radio frame and the third radio frame.
  • the input information includes: a first radio frame, the first radio frame includes first service identification information, the first service identification information indicates at least one candidate service identification, and the service corresponding to the candidate service identification is a service that is allowed in the restricted target Wake-up time TWT services transmitted within the service time.
  • processing according to the input information includes: sending a second radio frame, where the second radio frame includes second service identification information, the second service identification information indicates at least one request service identification, and the service corresponding to the request service identification is the first A station requests services transmitted within the limited TWT service time, and at least one requested service identifier is a subset of at least one candidate service identifier.
  • the input information includes a third radio frame, and the third radio frame indicates that the first station is allowed to join the restricted TWT protocol corresponding to the restricted TWT service time.
  • processing according to the input information includes: transmitting at least one service corresponding to the requested service identifier within the limited TWT service time.
  • the input information includes a first wireless frame, and the first wireless frame includes request information, and the request information is used to request establishment of a limited target wake-up time TWT protocol.
  • performing processing according to the input information includes: sending a second wireless frame to the station, where the second wireless frame includes a first TWT information element, and the first TWT information element corresponds to a restricted TWT protocol.
  • the output information includes the second radio frame and the third radio frame.
  • the third radio frame includes first service identification information, and the first service identification information indicates at least one candidate service identification, and the service corresponding to the candidate service identification is a service that is allowed to be transmitted within the limited TWT service time corresponding to the limited TWT protocol.
  • the output information includes a first wireless frame, and the first wireless frame includes request information, and the request information is used to request establishment of a limited target wake-up time TWT protocol.
  • the input information includes a second radio frame
  • the second radio frame includes a first TWT information element
  • the first TWT information element corresponds to a restricted TWT protocol
  • processing according to the second radio frame includes: transmitting services within the limited TWT service time.
  • the access points and stations described in the embodiments of the present application can also be implemented using the following: one or more field programmable gate arrays (field programmable gate array, FPGA), programmable logic A programmable logic device (PLD), controller, state machine, gate logic, discrete hardware components, any other suitable circuit, or any combination of circuits capable of performing the various functions described throughout this application.
  • FPGA field programmable gate array
  • PLD programmable logic A programmable logic device
  • controller state machine
  • gate logic discrete hardware components
  • any other suitable circuit any combination of circuits capable of performing the various functions described throughout this application.
  • the access points and stations described in the embodiments of the present application may be implemented by a general bus architecture.
  • FIG. 16 is a schematic structural diagram of a communication device 1600 provided by an embodiment of the present application, where the communication device 1600 includes a processor 1601 and a transceiver 1602 .
  • the communication device 1600 may be an access point or a station, or a chip therein.
  • FIG. 16 shows only the main components of the communication device 1600 .
  • the communication device may further include a memory 1603 and an input and output device (not shown in the figure).
  • the processor 1601 is mainly used to process communication protocols and communication data, control the entire communication device, execute software programs, and process data of the software programs.
  • the memory 1603 is mainly used to store software programs and data.
  • the transceiver 1602 may include a radio frequency circuit and an antenna, and the radio frequency circuit is mainly used for converting a baseband signal to a radio frequency signal and processing the radio frequency signal.
  • Antennas are mainly used to send and receive radio frequency signals in the form of electromagnetic waves.
  • Input and output devices such as touch screens, display screens, and keyboards, are mainly used to receive data input by users and output data to users.
  • the processor 1601, the transceiver 1602, and the memory 1603 may be connected through a communication bus.
  • the processor 1601 can read the software program in the memory 1603, interpret and execute the instructions of the software program, and process the data of the software program.
  • the processor 1601 performs baseband processing on the data to be sent, and then outputs the baseband signal to the radio frequency circuit.
  • the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 1601, and the processor 1601 converts the baseband signal into data and processes the data deal with.
  • the radio frequency circuit and the antenna can be set independently from the processor for baseband processing.
  • the radio frequency circuit and antenna can be arranged remotely from the communication device. .
  • the present application also provides a computer-readable storage medium, on which a computer program or instruction is stored, and when the computer program or instruction is executed by a processor, the functions of any one of the above method embodiments are realized.
  • the present application also provides a computer program product, which implements the functions of any one of the above method embodiments when the computer program product is executed by a processor.
  • the systems, devices and methods described in this application can also be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, that is, they may be located in one place, or may be distributed to multiple network units. Components shown as units may or may not be physical units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.
  • all or part of them may be implemented by software, hardware, firmware or any combination thereof.
  • a software program When implemented using a software program, it may be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer instructions. When the computer program or instructions are loaded and executed on the computer, the processes or functions according to the embodiments of the present application will be generated in whole or in part.
  • the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website, computer, server, or data center Transmission to another website site, computer, server or data center by wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.).
  • the computer-readable storage medium may be any available medium that can be accessed by a computer, or may be a data storage device including one or more servers, data centers, etc. that can be integrated with the medium.
  • the available medium may be a magnetic medium (such as a floppy disk, a hard disk, or a magnetic tape), an optical medium (such as a DVD), or a semiconductor medium (such as a solid state disk (solid state disk, SSD)), etc.
  • the computer may include the aforementioned apparatus.

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Abstract

本申请涉及WLAN技术领域，尤其涉及一种基于目标唤醒时间的通信方法、装置及系统，可应用于支持802.11be或EHT制式的无线通信系统。该方法中，由AP指示允许在受限的TWT SP内传输的业务对应的候选业务标识。STA在请求加入受限的TWT时，从AP指示的候选业务标识中选择一个或多个业务标识，STA选择的业务标识对应的业务即为STA请求在受限的TWT SP中传输的业务。AP收到STA的加入受限的TWT的请求后，可以同意STA加入该受限的TWT，从而在受限的TWT SP中传输STA选择的业务标识对应的业务。也就是说，本申请由AP限定在受限的TWT SP中传输时使用的业务标识，可以尽可能的限制STA在受限的TWT SP中随意传输业务，从而提高各个STA间的业务公平性，提高低时延业务的服务质量。

Description

基于目标唤醒时间的通信方法、装置及系统
本申请要求于2021年12月24日提交国家知识产权局、申请号为202111605342.2、申请名称为“基于目标唤醒时间的通信方法、装置及系统”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
本申请实施例涉及无线局域网领域，尤其涉及基于目标唤醒时间的通信方法、装置及系统。
背景技术
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无线保真(wireless fidelity，WiFi)承载。此外，层出不穷的移动应用对WLAN的时延性能的要求越来越高。例如无线视频、语音、游戏、增强现实(augmented reality，AR)等应用对通信时延有很高的要求。
通常，低时延业务的数据包是周期性产生的。目标唤醒时间(target wake time，TWT)机制定义的TWT服务时间(service period，SP)也是周期性出现的。从而，利用TWT技术来服务低时延业务是一个可行的思路。
发明内容
本申请提供一种基于目标唤醒时间的通信方法、装置及系统，能够提高业务公平性，从而提高低时延业务的服务质量。
第一方面，提供了一种基于目标唤醒时间的通信，该方法可以由接入点执行，也可以由接入点的部件，例如接入点的处理器、芯片、或芯片系统等执行，还可以由能实现全部或部分接入点功能的逻辑模块或软件实现。该方法包括：
发送第一无线帧，并接收来自第一站点的第二无线帧，再向第一站点发送第三无线帧。其中，第一无线帧包括第一业务标识信息，第一业务标识信息指示至少一个候选业务标识，候选业务标识对应的业务为允许在受限的目标唤醒时间TWT服务时间内传输的业务。第二无线帧包括第二业务标识信息，第二业务标识信息指示至少一个请求业务标识，请求业务标识对应的业务为第一站点请求在受限的TWT服务时间内传输的业务，至少一个请求业务标识为至少一个候选业务标识的子集。第三无线帧指示同意第一站点加入受限的TWT服务时间对应的受限的TWT协议。
基于该方案，由接入点指示允许在受限的TWT SP内传输的业务对应的候选业务标识。站点从接入点指示的候选业务标识中选择一个或多个业务标识，站点选择的业务标识对应的业务即为站点请求在受限的TWT SP中传输的业务。接入点收到站点的请求后，可以同意站点加入该受限的TWT，从而在受限的TWT SP中传输站点选择的业务标识对应的业务。也就是说，本申请中由接入点限定在受限的TWT SP内传输的业务，相比于由站点决定在受限的TWT SP内传输的业务的方法，可以尽可能的限制站点在受限的TWT SP中随意传输业务，从而提高各个站点间的业务公平性，提高低时延业务的服务质量。
在一种可能的设计中，该方法还包括：接收来自第二站点的第四无线帧，第四无线帧包括请求信息，请求信息用于请求建立受限的TWT协议。
基于该可能的设计，站点可以向接入点请求建立受限的TWT协议，接入点可以响应该请求向站点建立受限的TWT协议，使得站点可以在受限的TWT SP内传输业务，降低业务的传输时延。
在一种可能的设计中，第四无线帧包括第二TWT信息元素，请求信息携带在第二TWT信息元素的第一字段中。
在一种可能的设计中，第二TWT信息元素包括广播TWT信息字段。第一字段为广播TWT信息字段中的广播TWT标识字段；或者，广播TWT信息字段包括受限的业务信息存在字段和广播TWT标识字段，第一字段位于受限的业务信息存在字段和广播TWT标识字段之间。
在一种可能的设计中，第一字段为广播TWT标识字段，请求信息为预设的广播TWT标识。
第二方面，提供了一种基于目标唤醒时间的通信，该方法可以由第一站点执行，也可以由第一站点的部件，例如第一站点的处理器、芯片、或芯片系统等执行，还可以由能实现全部或部分第一站点功能的逻辑模块或软件实现。该方法包括：
接收来自接入点的第一无线帧，并向接入点发送第二无线帧，再接收来自接入点的第三无线帧。其中，第一无线帧包括第一业务标识信息，第一业务标识信息指示至少一个候选业务标识，候选业务标识对应的业务为允许在受限的目标唤醒时间TWT服务时间内传输的业务。第二无线帧包括第二业务标识信息，第二业务标识信息指示至少一个请求业务标识，请求业务标识对应的业务为第一站点请求在受限的TWT服务时间内传输的业务，至少一个请求业务标识为至少一个候选业务标识的子集。第三无线帧指示同意第一站点加入受限的TWT服务时间对应的受限的TWT协议。
基于该方案，由接入点指示允许在受限的TWT SP内传输的业务对应的候选业务标识。站点从接入点指示的候选业务标识中选择一个或多个业务标识，站点选择的业务标识对应的业务即为站点请求在受限的TWT SP中传输的业务。接入点收到站点的请求后，可以同意站点加入该受限的TWT，从而在受限的TWT SP中传输站点选择的业务标识对应的业务。也就是说，本申请中由接入点限定在受限的TWT SP内传输的业务，相比于由站点决定在受限的TWT SP内传输的业务的方法，可以尽可能的限制站点在受限的TWT SP中随意传输业务，从而提高各个站点间的业务公平性，提高低时延业务的服务质量。
结合第一方面或第二方面，在一种可能的设计中，第一业务标识信息包括上行业务标识位图，和/或，下行业务标识位图。其中，上行业务标识位图指示至少一个候选业务标识中的上行业务标识，下行业务标识位图指示至少一个候选业务标识中的下行业务标识。
基于该可能的设计，接入点可以指示允许在受限的TWT SP使用的上行业务标识和/或下行业务标识，并且将上行业务标识和下行业务标识分开讨论，能够清晰、全面地对受限的TWT SP内传输的业务进行控制。此外，通过位图指示业务标识，相比于在第一业务标识信息中显式携带业务标识的方案，可以降低信令开销。
结合第一方面或第二方面，在一种可能的设计中，第一无线帧包括第一TWT信息元素，第一TWT信息元素中的受限的TWT业务信息字段包括受限的TWT上行业务标识位图字段和受限的TWT下行业务标识位图字段。其中，上行业务标识位图携带在受限的TWT上行业务标识位图字段中，下行业务标识位图携带在受限的TWT下行业务标识位图字段中。
结合第一方面或第二方面，在一种可能的设计中，受限的TWT业务信息字段包括业务控制信息字段，业务控制信息字段包括上行业务标识位图有效字段和下行业务标识位图有效 字段。其中，上行业务标识位图有效字段指示第一业务标识信息是否包括上行业务标识位图，下行业务标识位图有效字段指示第一业务标识信息是否包括下行业务标识位图。
基于该可能的设计，通过业务标识位图有效字段来指示第一业务标识信息包括的业务标识位图的类型，有助于站点正确地对第一TWT信息元素进行解析，从而使得接入点和站点对第一TWT信息元素理解一致，提高通信效率。
结合第一方面或第二方面，在一种可能的设计中，该方法还包括：在受限的TWT服务时间内传输至少一个请求业务标识对应的业务。
基于该可能的设计，在受限的TWT服务时间内传输请求业务标识对应的业务，能够降低该业务的时延，从而提高服务质量。
结合第一方面或第二方面，在一种可能的设计中，该方法还包括：至少一个请求业务标识对应的业务传输完成后，在受限的TWT服务时间内传输第一业务，至少一个候选业务标识不包括第一业务的业务标识。
基于该可能的设计，在请求业务标识对应的业务传输完成后，还可以继续传输其他业务，从而有效利用受限的TWT SP，降低资源浪费。
第三方面，提供了一种基于目标唤醒时间的通信，该方法可以由接入点执行，也可以由接入点的部件，例如接入点的处理器、芯片、或芯片系统等执行，还可以由能实现全部或部分接入点功能的逻辑模块或软件实现。该方法包括：接收来自站点的第一无线帧，并向站点发送第二无线帧。其中，第一无线帧包括请求信息，该请求信息用于请求建立受限的目标唤醒时间TWT协议。第二无线帧包括第一TWT信息元素，第一TWT信息元素对应受限的TWT协议。
基于该方案，站点可以向接入点请求建立受限的TWT协议，接入点可以响应该请求向站点发送第一TWT信息元素，使得站点可以在受限的TWT SP内传输业务，降低业务的传输时延。
在一种可能的设计中，该方法还包括：广播第三无线帧，第三无线帧包括第一业务标识信息，第一业务标识信息指示至少一个候选业务标识，候选业务标识对应的业务为允许在受限的TWT协议对应的受限的TWT服务时间内传输的业务。
基于该可能的设计，接入点通过指示允许在受限的TWT服务时间内传输业务对应的业务标识，可以尽可能的限制站点在受限的TWT SP中随意传输业务，从而提高各个站点间的业务公平性，提高低时延业务的服务质量。
第四方面，提供了一种基于目标唤醒时间的通信，该方法可以由站点执行，也可以由站点的部件，例如站点的处理器、芯片、或芯片系统等执行，还可以由能实现全部或部分站点功能的逻辑模块或软件实现。该方法包括：向接入点发送第一无线帧，并接收来自接入点的第二无线帧。其中，第一无线帧包括请求信息，该请求信息用于请求建立受限的目标唤醒时间TWT协议。第二无线帧包括第一TWT信息元素，该第一TWT信息元素对应受限的TWT协议。
基于该方案，站点可以向接入点请求建立受限的TWT协议，接入点可以响应该请求向站点发送第一TWT信息元素，使得站点可以在受限的TWT SP内传输业务，降低业务的传输时延。
在一种可能的设计中，该方法还包括：接收来自接入点的第三无线帧，第三无线帧包括第一业务标识信息，第一业务标识信息指示至少一个候选业务标识，候选业务标识对应的业务为允许在受限的TWT协议对应的受限的TWT服务时间内传输的业务。
基于该可能的设计，站点收到第三无线帧后，可以在受限的TWT服务时间内传输候选业务标识对应的业务，提高业务的服务质量。
结合第三方面或第四方面，在一种可能的设计中，第一无线帧还包括第二业务标识信息，第二业务标识信息指示至少一个请求业务标识，请求业务标识对应的业务为站点请求在受限的TWT服务时间内传输的业务，至少一个候选业务标识包括至少一个请求业务标识。
基于该可能的设计，站点在请求接入点建立受限的TWT协议时，可以携带其请求在受限的TWT服务时间内传输的业务对应的业务标识，为接入点对TWT服务时间内允许传输的业务的判断提供参考。
结合第三方面或第四方面，在一种可能的设计中，第一无线帧包括第二TWT信息元素，请求信息携带在第二TWT信息元素的第一字段中。
结合第三方面或第四方面，在一种可能的设计中，第二TWT信息元素包括广播TWT信息字段。第一字段为广播TWT信息字段中的广播TWT标识字段；或者，广播TWT信息字段包括受限的业务信息存在字段和广播TWT标识字段，第一字段位于受限的业务信息存在字段和广播TWT标识字段之间。
结合第三方面或第四方面，在一种可能的设计中，第一字段为广播TWT标识字段，请求信息为预设的广播TWT标识。
第五方面，提供了一种通信装置用于实现上述各种方法。该通信装置可以为第一方面或第三方面中的接入点，或者接入点中包括的装置，比如芯片；或者，该通信装置可以为第二方面或第四方面中的站点，或者站点中包括的装置，比如芯片。所述通信装置包括实现上述方法相应的模块、单元、或手段(means)，该模块、单元、或means可以通过硬件实现，软件实现，或者通过硬件执行相应的软件实现。该硬件或软件包括一个或多个与上述功能相对应的模块或单元。
在一些可能的设计中，该通信装置可以包括发送模块和接收模块。进一步的，该通信装置还可以包括处理模块。该发送模块，可以用以实现上述任一方面及其任意可能的设计中的发送类的功能。该接收模块，可以用以实现上述任一方面及其任意可能的设计中的接收类的功能。该处理模块，可以用于实现上述任一方面及其任意可能的设计中的处理功能。
第六方面，提供了一种通信装置，包括：处理器和存储器；该存储器用于存储计算机指令，当该处理器执行该指令时，以使该通信装置执行上述任一方面所述的方法。该通信装置可以为第一方面或第三方面中的接入点，或者接入点中包括的装置，比如芯片；或者，该通信装置可以为第二方面或第四方面中的站点，或者站点中包括的装置，比如芯片。
第七方面，提供一种通信装置，包括：处理器和通信接口；该通信接口，用于与该通信装置之外的模块通信；所述处理器用于执行计算机程序或指令，以使该通信装置执行上述任一方面所述的方法。该通信装置可以为第一方面或第三方面中的接入点，或者接入点中包括的装置，比如芯片；或者，该通信装置可以为第二方面或第四方面中的站点，或者站点中包括的装置，比如芯片。
第八方面，提供一种通信装置，包括：逻辑电路和接口电路；该接口电路，用于输入信息和/或输出信息；该逻辑电路用于执行上述任一方面所述的方法，根据输入的信息进行处理和/或生成输出的信息。该通信装置可以为第一方面或第三方面中的接入点，或者接入点中包括的装置，比如芯片；或者，该通信装置可以为第二方面或第四方面中的站点，或者站点中包括的装置，比如芯片。
结合第八方面，在第八方面的一种实施方式中，该通信装置用于实现上述第一方面所述 的接入点的功能时：
在一种可能的设计中，输入的信息包括：第二无线帧，该第二无线帧包括第二业务标识信息，第二业务标识信息指示至少一个请求业务标识，请求业务标识对应的业务为第一站点请求在受限的TWT服务时间内传输的业务，至少一个请求业务标识为至少一个候选业务标识的子集。相应的，根据输入的信息进行处理，包括：向第一站点发送第三无线帧，第三无线帧指示同意第一站点加入受限的TWT服务时间对应的受限的TWT协议。
在一种可能的设计中，输入的信息包括：第四无线帧，该第四无线帧包括请求信息，该请求信息用于请求建立受限的TWT协议。相应的，根据输入的信息进行处理，包括：发送第一无线帧，第一无线帧包括第一业务标识信息，第一业务标识信息指示至少一个候选业务标识，候选业务标识对应的业务为允许在受限的目标唤醒时间TWT服务时间内传输的业务。
在一种可能的设计中，输出的信息包括第一无线帧和第三无线帧。
结合第八方面，在第八方面的一种实施方式中，该通信装置用于实现上述第二方面所述的第一站点的功能时：
在一种可能的设计中，输入的信息包括：第一无线帧，第一无线帧包括第一业务标识信息，第一业务标识信息指示至少一个候选业务标识，候选业务标识对应的业务为允许在受限的目标唤醒时间TWT服务时间内传输的业务。相应的，根据输入的信息进行处理，包括：发送第二无线帧，该第二无线帧包括第二业务标识信息，第二业务标识信息指示至少一个请求业务标识，请求业务标识对应的业务为第一站点请求在受限的TWT服务时间内传输的业务，至少一个请求业务标识为至少一个候选业务标识的子集。
在一种可能的设计中，输入的信息包括第三无线帧，第三无线帧指示同意第一站点加入受限的TWT服务时间对应的受限的TWT协议。相应的，根据输入的信息进行处理，包括：在受限的TWT服务时间内传输至少一个请求业务标识对应的业务。
结合第八方面，在第八方面的一种实施方式中，该通信装置用于实现上述第三方面所述的接入点的功能时：
在一种可能的设计中，输入的信息包括第一无线帧，第一无线帧包括请求信息，请求信息用于请求建立受限的目标唤醒时间TWT协议。相应的，根据输入的信息进行处理，包括：向站点发送第二无线帧，第二无线帧包括第一TWT信息元素，第一TWT信息元素对应受限的TWT协议。
在一种可能的设计中，输出的信息包括第二无线帧和第三无线帧。第三无线帧包括第一业务标识信息，第一业务标识信息指示至少一个候选业务标识，候选业务标识对应的业务为允许在受限的TWT协议对应的受限的TWT服务时间内传输的业务。
结合第八方面，在第八方面的一种实施方式中，该通信装置用于实现上述第四方面所述的站点的功能时：
在一种可能的设计中，输出的信息包括第一无线帧，第一无线帧包括请求信息，请求信息用于请求建立受限的目标唤醒时间TWT协议。
在一种可能的设计中，输入的信息包括第二无线帧，第二无线帧包括第一TWT信息元素，第一TWT信息元素对应受限的TWT协议。相应的，根据第二无线帧进行处理，包括：在受限的TWT服务时间内传输业务。
第九方面，提供了一种通信装置，包括：接口电路和处理器，该接口电路为代码/数据读写接口电路，该接口电路用于接收计算机执行指令(计算机执行指令存储在存储器中，可能直接从存储器读取，或可能经过其他器件)并传输至该处理器；处理器用于执行计算机执行 指令以使该通信装置执行上述任一方面所述的方法。该通信装置可以为第一方面或第三方面中的接入点，或者接入点中包括的装置，比如芯片；或者，该通信装置可以为第二方面或第四方面中的站点，或者站点中包括的装置，比如芯片。
第十方面，提供了一种通信装置，包括：至少一个处理器；所述处理器用于执行计算机程序或指令，以使该通信装置执行上述任一方面所述的方法。该通信装置可以为第一方面或第三方面中的接入点，或者接入点中包括的装置，比如芯片；或者，该通信装置可以为第二方面或第四方面中的站点，或者站点中包括的装置，比如芯片。
在一些可能的设计中，该通信装置包括存储器，该存储器，用于保存必要的计算机程序或指令。该存储器可以与处理器耦合，或者，也可以独立于该处理器。
在一些可能的设计中，该通信装置可以是芯片或芯片系统。该装置是芯片系统时，芯片系统可以包括芯片，也可以包含芯片和其他分立器件。
第十一方面，提供了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计算机程序或指令，当该计算机程序或指令被处理器执行时，使得上述任一方面所述的方法被执行。
第十二方面，提供了一种计算机程序产品，当该计算机程序产品被处理器执行时，使得上述任一方面所述的方法被执行。
可以理解的是，第五方面至第十二方面中任一方面提供的通信装置是芯片时，上述的发送动作/功能可以理解为输出信息，上述的接收动作/功能可以理解为输入信息。
其中，第五方面至第十二方面中任一种设计方式所带来的技术效果可参见上述第一方面或第二方面或第三方面或第四方面中不同设计方式所带来的技术效果，在此不再赘述。
第十三方面，提供一种通信系统，该通信系统包括上述第一方面所述的接入点和第二方面所述的第一站点。或者，该通信系统包括上述第三方面所述的接入点和第四方面所述的站点。
附图说明
图1为本申请提供的一种TWT SP的示意图；
图2为本申请提供的一种广播TWT元素的结构示意图；
图3为本申请提供的一种受限的TWT元素的结构示意图一；
图4为本申请提供的一种通信系统的结构示意图；
图5为本申请提供的一种WLAN设备的结构示意图；
图6为本申请提供的一种基于目标唤醒时间的通信方法的流程示意图；
图7为本申请提供的一种受限的TWT元素的结构示意图二；
图8为本申请提供的一种受限的TWT元素的结构示意图三；
图9为本申请提供的另一种基于目标唤醒时间的通信方法的流程示意图；
图10为本申请提供的一种受限的TWT元素的结构示意图四；
图11为本申请提供的一种受限的TWT元素的结构示意图五；
图12为本申请提供的又一种基于目标唤醒时间的通信方法的流程示意图；
图13为本申请提供的再一种基于目标唤醒时间的通信方法的流程示意图；
图14为本申请提供的一种接入点的结构示意图；
图15为本申请提供的一种站点的结构示意图；
图16为本申请提供的一种通信装置的结构示意图。
具体实施方式
在本申请的描述中，除非另有说明，“/”表示前后关联的对象是一种“或”的关系，例如，A/B可以表示A或B；本申请中的“和/或”仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况，其中A，B可以是单数或者复数。
在本申请的描述中，除非另有说明，“多个”是指两个或多于两个。“以下至少一项(个)”或其类似表达，是指的这些项中的任意组合，包括单项(个)或复数项(个)的任意组合。例如，a，b，或c中的至少一项(个)，可以表示：a，b，c，a-b，a-c，b-c，或a-b-c，其中a，b，c可以是单个，也可以是多个。
另外，为了便于清楚描述本申请实施例的技术方案，在本申请的实施例中，采用了“第一”、“第二”等字样对功能和作用基本相同的相同项或相似项进行区分。本领域技术人员可以理解“第一”、“第二”等字样并不对数量和执行次序进行限定，并且“第一”、“第二”等字样也并不限定一定不同。
在本申请实施例中，“示例性的”或者“例如”等词用于表示作例子、例证或说明。本申请实施例中被描述为“示例性的”或者“例如”的任何实施例或设计方案不应被解释为比其它实施例或设计方案更优选或更具优势。确切而言，使用“示例性的”或者“例如”等词旨在以具体方式呈现相关概念，便于理解。
可以理解，说明书通篇中提到的“实施例”意味着与实施例有关的特定特征、结构或特性包括在本申请的至少一个实施例中。因此，在整个说明书各个实施例未必指相同的实施例。此外，这些特定的特征、结构或特性可以任意适合的方式结合在一个或多个实施例中。可以理解，在本申请的各种实施例中，各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
可以理解，在本申请中，“…时”以及“若”均指在某种客观情况下会做出相应的处理，并非是限定时间，且也不要求实现时要有判断的动作，也不意味着存在其它限定。
可以理解，本申请实施例中的一些可选的特征，在某些场景下，可以不依赖于其他特征，比如其当前所基于的方案，而独立实施，解决相应的技术问题，达到相应的效果，也可以在某些场景下，依据需求与其他特征进行结合。相应的，本申请实施例中给出的装置也可以相应的实现这些特征或功能，在此不予赘述。
本申请中，除特殊说明外，各个实施例之间相同或相似的部分可以互相参考。在本申请中各个实施例、以及各实施例中的各个实施方式/实施方法/实现方法中，如果没有特殊说明以及逻辑冲突，不同的实施例之间、以及各实施例中的各个实施方式/实施方法/实现方法之间的术语和/或描述具有一致性、且可以相互引用，不同的实施例、以及各实施例中的各个实施方式/实施方法/实现方法中的技术特征根据其内在的逻辑关系可以组合形成新的实施例、实施方式、实施方法、或实现方法。以下所述的本申请实施方式并不构成对本申请保护范围的限定。
为了方便理解本申请实施例的技术方案，首先给出本申请相关技术的简要介绍如下。
第一、目标唤醒时间(target wake time，TWT)：
TWT是WiFi6定义的一种用于节能的机制。该机制下，接入点站点(access point station，AP STA)与非接入点站点(non-access point station，non-AP STA)协商建立TWT服务时间(service period，SP)，即TWT SP，在TWT SP内，终端醒来保持活跃状态，在TWT SP外，终端保持休眠(sleep)，从而达到节能的目的。
为了方便描述，本申请下述实施例中，将接入点站点描述为接入点或AP，将非接入点站点描述为站点或STA。
需要说明的是，本申请实施例中，TWT服务时间也可以称为TWT服务阶段，二者可以相互替换，不予限制。
第二、单播TWT(individual TWT)：
在单播TWT中，一个STA可以单独与AP建立一个TWT协议，因此，不同STA对应的活跃时间段(即TWT SP)和休眠时间段可以不同。
需要说明的是，本申请实施例中，TWT协议和TWT可以相互替换，建立TWT协议也可以称为建立TWT，加入TWT协议也可以称为加入TWT。
单播TWT中，TWT请求站点(TWT Requesting STA，简称请求站点)向TWT应答站点(TWT Responding STA，简称应答站点)发送TWT请求消息，用于请求设定TWT SP。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，用于告知TWT SP的信息。在交互成功后，请求站点与应答站点之间即建立了一个TWT协议。当TWT协议达成后，请求站点与应答站点都应该在TWT SP保持活跃状态，以便进行数据的收发。在TWT SP之外，STA可进行休眠以达到节能的目的。
通常情况下，由STA向AP发送TWT请求消息，即STA为请求站点，AP为应答站点。当然AP也可以向STA发送TWT请求消息。可选的，如图1所示，每个TWT协议可以包括一个或多个周期性出现的等长的TWT SP。
第三、广播TWT(broadcast TWT)：
广播TWT提供一种“批量管理”机制，AP可以与多个STA建立TWT协议，该TWT协议包括一系列周期性出现的TWT SP。在TWT SP中，该多个STA保持活跃状态。
可选的，AP可以在信标(Beacon)帧中携带一个或多个广播TWT的信息，每个广播TWT由广播TWT标识符和AP的介质接入控制(medium access control，MAC)地址表示。STA在收到信标帧后，若要加入某个广播TWT，可以向AP发送广播TWT请求消息，在该广播TWT请求消息中携带广播TWT标识符(identifier，ID)(Broadcast TWT ID)，以请求加入该广播TWT标识符对应的广播TWT。加入广播TWT后，STA可以按照TWT参数集所指示的TWT SP唤醒，从而与AP进行通信。若STA支持广播TWT，但在广播TWT请求消息中未携带广播TWT标识符，则默认STA请求加入Broadcast TWT ID＝0的广播TWT。
可选的，广播TWT的参数集可以指示TWT SP的周期以及持续时长。此外，还可以包括广播TWT的生命周期，指示广播TWT的持续时长。其中，广播TWT的生命周期可以信标帧间隔为单位。
可选的，广播TWT的参数集可以携带在TWT信息元素(information element，IE)中。需要说明的是，本申请下述实施例中的TWT IE也可以称为TWT元素(TWT element)，二者可以相互替换。示例性的，一种广播TWT元素的格式可以如图2所示。
参见图2，广播TWT元素包括元素标识(element identifier，element ID)字段、长度(length)字段、控制(control)字段、以及TWT参数信息字段。其中，长度字段指示TWT元素的长度，控制字段用于承载TWT控制信息，TWT参数信息字段的长度可变，用于承载TWT参数。
进一步的，控制字段可以包括空数据PPDU(null data PPDU，NDP)寻呼指示(NDP Paging Indicator)字段、响应端电量管理(power management，PM)模式(Responder PM Mode)字段、协商类型(Negotiation Type)字段、TWT信息帧禁用(TWT Information Frame Disabled)字段、唤醒时长单元(Wake Duration Unit)字段、以及预留(reserved)字段。其中，PPDU指物理层协议数据单元(physical protocol data unit，PPDU)。
进一步的，TWT参数信息字段可以包括请求类型(Request Type)字段、目标唤醒时间(Target Wake Time)字段、标称最小TWT唤醒持续时间(Nominal Minimum TWT Wake Duration)字段、TWT唤醒间隔小数(TWT Wake Interval Mantissa)字段、以及广播TWT信息(Broadcast TWT Info)字段。
其中，请求类型字段可以进一步包括TWT请求(TWT Request)字段、TWT建立命令(TWT Setup Command)字段、触发(Trigger)字段、最后一个广播参数集(Last Broadcast Parameter Set)字段、流类型(Flow Type)字段、TWT唤醒间隔指数(TWT Wake Interval Exponent)字段、以及预留(Reserved)字段。
其中，广播TWT信息字段可以进一步包括预留(Reserved)字段、广播TWT标识(Broadcast TWT ID)字段、以及广播TWT保持(Broadcast TWT Persistence)字段。
下面对广播TWT元素的部分字段的功能进行介绍，其余字段的介绍可参见801.11ax标准中的定义，在此不予赘述。
协商类型(Negotiation Type)字段：用于指示当前TWT元素是individual TWT元素还是broadcast TWT元素。例如，Negotiation Type字段设置为0时，当前TWT元素是individual TWT元素；Negotiation Type字段设置为2时，当前TWT元素是broadcast TWT元素。
TWT请求(TWT Request)字段：用于指示当前TWT元素是AP发送的还是STA发送的。需要说明的是，当前TWT元素为STA发送的TWT元素时，可以用于STA请求加入某个广播TWT SP。
目标唤醒时间(Target Wake Time)字段、标称最小TWT唤醒持续时间(Nominal Minimum TWT Wake Duration)字段、TWT唤醒间隔小数(TWT Wake Interval Mantissa)字段分别表示TWT SP的开始时刻、持续时间、和相邻TWT SP之间的间隔。
广播TWT标识(Broadcast TWT ID)字段用来唯一标识一个TWT。一个TWT用<Broadcast TWT ID,MAC Address>二元组来识别，其中，MAC Address是AP的MAC地址。
第四、受限的目标唤醒时间(restricted TWT，rTWT)：
随着WLAN技术的不断升级，越来越多的业务要求极低的通信时延(称为低时延业务)。为了尽可能满足不同类型的流量需求，WLAN进行了业务优先级的划分。例如，在信道竞争接入过程中，设备可以使用四个不同的接入等级(Access Category)，通过不同的竞争参数实现传输优先级的划分。其中，每个接入等级可以包括两个业务标识(traffic identifier，TID)对应两种不同的业务。
然而，仅通过竞争参数的区分，难以保证低时延和低时延抖动。但是，由于低时延业务的数据包通常是周期性产生的，TWT定义的TWT SP也是周期性出现的，从而，利用TWT技术来服务低时延业务是一个可行的思路。基于此，受限的TWT应运而生。
受限的TWT是一种特殊的广播TWT，其定义的受限的TWT SP(rTWT SP)用于服务低时延业务。AP可以在信标帧中携带TWT元素来声明受限的TWT SP。受限的TWT对应的TWT元素的结构可以如图3所示。
参见图3，TWT元素包括元素标识(element identifier，element ID)字段、长度(length)字段、控制(control)字段、以及TWT参数信息字段。
TWT参数信息字段可以包括请求类型(Request Type)字段、目标唤醒时间(Target Wake Time)字段、标称最小TWT唤醒持续时间(Nominal Minimum TWT Wake Duration)字段、TWT唤醒间隔小数(TWT Wake Interval Mantissa)字段、广播TWT信息(Broadcast TWT Info)字段、以及受限的TWT业务信息(Restricted TWT Traffic Info)字段。
其中，请求类型字段可以进一步包括TWT请求(TWT Request)字段、TWT建立命令(TWT Setup Command)字段、触发(Trigger)字段、最后一个广播参数集(Last Broadcast Parameter Set)字段、流类型(Flow Type)字段、广播TWT推荐(Broadcast TWT Recommendation)字段、TWT唤醒间隔指数(TWT Wake Interval Exponent)字段、以及预留(Reserved)字段。
其中，广播TWT信息字段可以进一步包括受限的业务信息存在(Restricted Traffic Info Present)字段、预留(Reserved)字段、广播TWT标识(Broadcast TWT ID)字段、以及广播TWT保持(Broadcast TWT Persistence)字段。
需要说明的是，图3中与图2相同的字段，具体含义与结构可以与图2相同。当然，也可以有其他含义与结构，本申请对此不做具体限制。图3中以控制字段的结构与图2相同为例进行说明。
通常，可以将TWT元素中的请求类型字段中的广播TWT推荐字段的值设置为4，表示当前TWT为受限的TWT。AP在信标帧中声明受限的TWT之后，STA可以向AP发送请求帧(例如TWT setup frame)，以请求加入受限的TWT，以便在受限的TWT SP中传输低时延业务。
然而，如何控制在受限的TWT SP中传输的业务，以保证业务的公平性，目前尚未有相关的解决方案。基于此，本申请提供一种基于目标唤醒时间的通信方法，该方法中，由AP指示允许在受限的TWT SP中使用的候选业务标识。STA在请求加入受限的TWT时，从AP指示的候选业务标识中选择一个或多个业务标识，STA选择的业务标识对应的业务即为STA请求在受限的TWT SP中传输的业务；换言之，STA在请求加入受限的TWT时，其请求的在受限的TWT SP中传输的业务的标识只可以在候选业务标识的范围内。AP收到STA的加入受限的TWT的请求后，可以同意STA加入该受限的TWT，从而在受限的TWT SP中传输STA选择的业务标识对应的业务。也就是说，本申请中由AP限定在受限的TWT SP中传输时使用的业务标识，可以限制STA在受限的TWT SP中传输的业务，防止STA在受限的TWT中随意传输业务，从而提高各个STA间的业务公平性，提高低时延业务的服务质量。
下面将结合附图对本申请的方案进行说明。本申请实施例可以适用于WLAN的场景，可以适用于IEEE 802.11系统标准，例如802.11a/b/g标准、802.11n标准、802.11ac标准、802.11ax标准，或其下一代，例如802.11be标准，又称为Wi-Fi7或极高吞吐量(extremely high-throughput，EHT)标准或更下一代的标准中。或者，本申请实施例也可以适用于物联网(internet of things，IoT)网络或车联网(Vehicle to X，V2X)网络等无线局域网系统中。当然，本申请实施例还可以适用于其他可能的通信系统，例如，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)、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、以及未来的第五代(5th generation，5G)通信系统等。
首先，本申请提供一种本申请实施例适用的WLAN通信系统，该WLAN通信系统包括AP和STA。需要说明的是，本申请实施例涉及的STA也可以称为终端，这两者可以相互替换，本申请提供的方法对此不做具体限定。
作为一种示例，请参见图4，示出了本申请提供的WLAN通信系统的架构图。图4以该WLAN包括一个AP、STA1、STA2、STA3、STA4、以及STA5为例。AP可为与其关联的STA，和/或未关联的STA调度无线资源，并在调度的无线资源上为该STA传输数据。例如AP可 为STA1、STA2、STA3、STA4、以及STA5调度无线资源，并在调度的无线资源上为STA1、STA2、STA3、STA4、以及STA5传输数据，包括上行数据信息和/或下行数据信息。
另外，本申请实施例可以适用于AP与STA之间的通信。本申请实施例中的AP和STA可以是支持多条链路并行进行传输的无线通信设备。例如，称为多链路设备(Multi-link device，MLD)或多频段设备(multi-band device，MBD)，具有更高的传输效率和更高的吞吐量。应理解，图4中的AP和STA的数量仅是举例，还可以更多或者更少。
本申请实施例涉及的STA可以为无线通讯芯片、无线传感器或无线通信终端。例如支持无线保真(wireless fidelity，Wi-Fi)通讯功能的用户终端、用户装置，接入装置，订户站，订户单元，移动站，用户代理，用户装备，其中，用户终端可以包括各种具有无线通信功能的手持设备、车载设备、可穿戴设备、物联网(internet of things，IoT)设备、计算设备或连接到无线调制解调器的其它处理设备，以及各种形式的用户设备(user equipment，UE)，移动台(mobile station，MS)，终端(terminal)，终端设备(terminal equipment)，便携式通信设备，手持机，便携式计算设备，娱乐设备，游戏设备或系统，全球定位系统设备或被配置为经由无线介质进行网络通信的任何其他合适的设备等。此外，STA可以支持802.11be或者802.11be下一代制式。STA也可以支持802.11ax、802.11ac、802.11n、802.11g、802.11b及802.11a等多种WLAN制式。
本申请实施例涉及的AP可以为一种部署在无线通信网络中为其关联的STA提供无线通信功能的装置，主要部署于家庭、大楼内部以及园区内部，典型覆盖半径为几十米至上百米，当然，也可以部署于户外。AP相当于一个连接有线网和无线网的桥梁，主要作用是将各个无线网络客户端连接到一起，然后将无线网络接入以太网。具体的，AP可以是带有WiFi芯片的基站、路由器、网关、中继器，通信服务器，交换机或网桥等通信设备，其中，所述基站可以包括各种形式的宏基站，微基站，中继站等。此外，AP可以支持802.11be制式或者802.11be下一代制式。AP也可以支持802.11ax、802.11ac、802.11n、802.11g、802.11b及802.11a等WLAN制式。
在一些实施例中，本申请涉及的AP和STA可以统称为WLAN设备，具体实现时，WLAN设备可以采用图5所示的组成结构，或者包括图5所示的部件。
参见图5，为本申请实施例提供的一种WLAN设备500的组成示意图，该WLAN设备500可以为STA或者STA中的芯片或者芯片系统(或称为片上系统)；也可以为AP或者AP中的芯片或者芯片系统(或称为片上系统)。本申请实施例中，芯片系统可以由芯片构成，也可以包括芯片和其他分立器件。
如图5所示，该WLAN设备500包括处理器501和收发器502。进一步的，该WLAN设备500还可以包括存储器504。其中，处理器501，存储器504以及收发器502之间可以通过通信线路503连接。
可选的，处理器501可以是中央处理器(central processing unit，CPU)、通用处理器网络处理器(network processor，NP)、数字信号处理器(digital signal processing，DSP)、微处理器、微控制器、可编程逻辑器件(programmable logic device，PLD)或它们的任意组合。处理器501还可以是其它具有处理功能的装置，例如电路、器件或软件模块，不予限制。
在一种示例中，处理器501可以包括一个或多个CPU，例如图5中的CPU0和CPU1。WLAN设备500可以包括多个处理器，例如，除图5中的处理器501之外，还可以包括其他处理器(图5中未示出)。
收发器502，用于与其他设备或其它通信网络进行通信。该其它通信网络可以为以太网， 无线接入网(radio access network，RAN)，WLAN等。收发器502可以是模块、电路、收发器或者任何能够实现通信的装置。
通信线路503，用于在WLAN设备500所包括的各部件之间传送信息。
存储器504，用于存储指令。其中，指令可以是计算机程序。存储器504可以是只读存储器(read-only memory，ROM)或可存储静态信息和/或指令的其他类型的静态存储设备，也可以是随机存取存储器(random access memory，RAM)或可存储信息和/或指令的其他类型的动态存储设备，还可以是电可擦可编程只读存储器(electrically erasable programmable read-only memory，EEPROM)、只读光盘(compact disc read-only memory，CD-ROM)或其他光盘存储、光碟存储(包括压缩光碟、激光碟、光碟、数字通用光碟、蓝光光碟等)、磁盘存储介质或其他磁存储设备等，不予限制。
需要指出的是，存储器504可以独立于处理器501存在，也可以和处理器501集成在一起。存储器504可以用于存储指令或者程序代码或者一些数据等。存储器504可以位于WLAN设备500内，也可以位于WLAN设备500外，不予限制。处理器501，可以执行存储器504中存储的指令，以实现本申请下述实施例提供的方法。
作为一种可选的实现方式，WLAN设备500还包括输出设备505和输入设备506。示例性地，输入设备506是键盘、鼠标、麦克风或操作杆等设备，输出设备505是显示屏、扬声器(speaker)等设备。
可以理解的是，图5中示出的组成结构并不构成对该WLAN设备的限定，除图5所示部件之外，该WLAN设备可以包括比图示更多或更少的部件，或者组合某些部件，或者不同的部件布置。
下面将对本申请实施例提供的方法进行展开说明。可以理解的，本申请实施例中，执行主体可以执行本申请实施例中的部分或全部步骤，这些步骤或操作仅是示例，本申请实施例还可以执行其它操作或者各种操作的变形。此外，各个步骤可以按照本申请实施例呈现的不同的顺序来执行，并且有可能并非要执行本申请实施例中的全部操作。
参见图6，为本申请提供的一种基于目标唤醒时间的通信方法，该通信方法包括如下步骤：
S601、接入点发送第一无线帧。相应的，第一站点接收来自接入点的第一无线帧。
可选的，第一无线帧可以为信标帧。接入点发送第一无线帧，可以包括：接入点广播第一无线帧。相应的，可以由多个站点接收该第一无线帧，第一站点可以是接收到第一无线帧的任意站点。接收的第一无线帧的其他站点也实现本申请中第一站点所实现的功能。
其中，第一无线帧包括第一业务标识信息。该第一业务标识信息指示至少一个候选业务标识，候选业务标识对应的业务为允许在受限的TWT SP内传输的业务。或者说，候选业务标识为允许在受限的TWT SP内使用的业务标识。
可选的，该至少一个候选业务标识可以构成候选业务标识集合，即第一业务标识信息可以指示候选业务标识集合，该候选业务标识集合包括至少一个候选业务标识。
一种实现中，第一业务标识信息可以包括上行业务标识位图(Bitmap)，和/或，下行业务标识位图。其中，上行业务标识位图指示至少一个候选业务标识中的上行业务标识；下行业务标识位图指示至少一个候选业务标识中的下行业务标识。可以理解的，上行业务标识用于标识上行业务，下行业务标识用于标识下行业务。
可选的，上行业务标识位图的比特数可以和上行业务标识的总数相等，位图中的每个比特可以对应一个上行业务标识，在某个比特的取值为约定数值时，可以指示该比特对应的上 行业务标识。
示例性的，以上行业务标识的总数等于8为例，上行业务标识位图可以包括8个比特。假设该8个比特从左到右依次对应的业务标识为0到7，若约定数值为1，那么上行业务标识位图为00110100时，指示上行业务标识2、3、和5，即AP允许业务标识为2、3和5的上行业务在受限的TWT SP内传输。下行业务标识位图的实现可参考上行业务标识位图的说明，在此不再赘述。
基于该方案，接入点可以指示允许在受限的TWT SP使用的上行业务标识和/或下行业务标识，并且将上行业务标识和下行业务标识分开讨论，能够清晰、全面地对受限的TWT SP内传输的业务进行控制。
可选的，第一无线帧可以包括第一TWT信息元素，该第一TWT信息元素可以用于声明受限的TWT。如图7所示，第一TWT信息元素可以包括受限的TWT业务信息字段。进一步的，受限的TWT业务信息字段可以包括受限的TWT上行业务标识位图(Restricted TWT UL TID Bitmap)字段和受限的下行业务标识位图(Restricted TWT DL TID Bitmap)字段。相应的，上行业务标识位图可以携带在受限的TWT上行业务标识位图字段中。下行业务标识位图可以携带在受限的TWT下行业务标识位图字段中。此外，受限的TWT业务信息字段还可以包括业务信息控制(Traffic Info Control)字段。
可选的，接入点可以指示第一业务标识信息具体包括的位图的类型。示例性的，如图8所示，在第一TWT信息元素中的受限的TWT业务信息字段还包括业务信息控制(Traffic Info Control)字段时，该业务信息控制字段可以包括上行业务标识位图有效(UL TID Bitmap Valid)字段和下行业务标识有效(DL TID Bitmap Valid)字段。上行业务标识位图有效字段可以指示第一业务标识信息是否包括上行业务标识位图，下行业务标识有效字段指示第一业务标识信息是否包括下行业务标识位图。
示例性的，上行业务标识位图有效字段的取值为第一数值时，可以指示第一业务标识信息包括上行业务标识位图。上行业务标识位图有效字段的取值为第二数值时，可以指示第一业务标识信息不包括上行业务标识位图。第一数值可以为1，相应的，第二数值为0；或者，第一数值可以为0，相应的，第二数值为1，不予限制。
可选的，图7和图8中除受限的TWT业务信息字段外的其他字段可以参考图3的相关说明，在此不再赘述。
可选的，在上行业务标识位图携带在受限的TWT上行业务标识位图字段中时，上行业务标识位图有效字段也可以指示受限的TWT业务信息字段是否包括受限的TWT上行业务标识位图字段。在下行业务标识位图携带在受限的TWT下行业务标识位图字段中时，下行业务标识位图有效字段也可以指示受限的TWT业务信息字段是否包括受限的TWT下行业务标识位图字段。
另一种实现中，前述的第一业务标识信息可以包括一个业务标识位图(Bitmap)，该业务标识位图可以用于指示至少一个候选业务标识中的上行业务标识，或者用于指示至少一个候选业务标识中的下行业务标识。该业务标识位图用于指示上行业务标识还是下行业务标识，可以是默认的，或者可以是由其他字段来规定的。例如，可以用上行业务标识位图有效字段来指示该业务标识位图是用于指示上行业务标识的上行业务标识位图，用下行业务标识位图有效字段来指示该业务表示位图是用于指示下行业务标识的下行业务标识位图。或者用一个业务标识位图有效字段来指示该业务标识位图是用于指示上行业务标识还是下行业务标识，例如业务标识位图有效字段的取值为第一数值时，可以指示业务标识位图用于指示上行业务 标识，或者说指示业务标识位图是上行业务标识位图；业务标识位图有效字段的取值为第二数值时，可以指示业务标识位图用于指示下行业务标识，或者说指示业务标识位图是下行业务标识位图。
再一种实现中，前述的第一业务标识信息可以包括一个业务标识位图(Bitmap)，该业务标识位图用于同时指示至少一个候选业务标识中的上行和下行业务标识。当上行业务标识和下行业务标识用一个业务标识位图指示时，其指示上行和下行的业务标识相同。例如，以业务标识位图包括8个比特为例，假设该8个比特从左到右依次对应的业务标识为0到7，那么上行业务标识位图为00110100时，表示AP允许在受限的TWT SP内传输的上行业务的业务标识包括2、3、和5，以及允许在受限的TWT SP内传输的下行业务的业务标识包括2、3、和5。基于该实现，可以节约业务标识位图的指示开销。
S602、第一站点向接入点发送第二无线帧。相应的，接入点接收来自第一站点的第二无线帧。
其中，第二无线帧包括第二业务标识信息，第二业务标识信息指示至少一个请求业务标识。该请求业务标识对应的业务为第一站点请求在受限的TWT SP内传输的业务。此外，至少一个请求业务标识为至少一个候选业务标识的子集，或者说，至少一个请求业务标识属于至少一个候选业务标识，或者说，至少一个请求业务标识不能包括至少一个候选业务标识中未包括(或不存在)的业务标识。
可选的，该至少一个请求业务标识可以构成请求业务标识集合，即第二业务标识信息可以指示请求业务标识集合，该请求业务标识集合包括至少一个请求业务标识。且，请求业务标识集合为候选业务标识集合的子集。
示例性的，第一业务标识信息指示的候选业务标识为4、5、6、7时，请求业务标识为4-7的子集，不能为4-7之外的其他业务标识。例如，第二业务标识信息指示的至少一个请求业务标识可以为6、7，或者可以为5、6、7。
一种实现中，第二业务标识信息可以包括上行业务标识位图，和/或下行业务标识位图。该上行业务标识位图指示至少一个请求业务标识中的上行业务标识；下行业务标识位图指示至少一个请求业务中的下行业务标识。可以理解的是，请求业务标识中的上行业务标识为候选业务标识中的上行业务标识的子集，请求业务标识中的下行业务标识为候选业务标识中的下行业务标识的子集。可选的，第二业务标识信息可以携带在TWT信息元素的受限的TWT业务信息字段中。受限的TWT业务信息字段还可以包括业务控制信息字段，该业务控制信息字段可以包括两个字段分别用于指示第二业务标识信息是否包括上行业务标识位图，以及第二业务标识信息是否包括下行业务标识位图。可参考步骤S601中第一业务标识信息的相关说明，在此不再赘述。
另一种实现中，第二业务标识信息可以包括一个业务标识位图(Bitmap)，该业务标识位图可以用于指示至少一个请求业务标识中的上行业务标识，或者用于指示至少一个请求业务标识中的下行业务标识。该业务标识位图用于指示上行业务标识还是下行业务标识，可以是默认的，或者可以是由其他字段来规定的。可参考步骤S601中第一业务标识信息的相关说明，在此不再赘述。
再一种实现中，第二业务标识信息可以包括一个业务标识位图(Bitmap)，该业务标识位图用于同时指示至少一个请求业务标识中的上行和下行业务标识。当上行业务标识和下行业务标识用一个业务标识位图指示时，其指示上行和下行的业务标识相同。可参考步骤S601中第一业务标识信息的相关说明，在此不再赘述。
可选的，第二无线帧可以用于请求加入接入点声明的受限的TWT协议。示例性的，其可以为TWT建立请求(TWT setup request)帧，或者可以为TWT建立帧(TWT setup frame)，或者，可以为保护的TWT建立帧(Protected TWT setup frame)。当然，还可以为其他类型的帧，不予限制。
可选的，本申请中并不限定业务标识和具体业务的对应关系，接入点允许候选业务标识对应的业务在受限的TWT SP内传输，至于候选业务标识对应的具体业务类型可以由站点确定。
示例性的，假设候选业务标识为4-7，请求业务标识为6、7，那么业务标识6、7对应的业务类型可以由站点确定。例如，站点可以使用业务标识6来传输视频业务，使用业务标识7来传输AR业务，即业务标识6对应视频业务，业务标识7对应AR业务。或者，站点可以使用业务标识6来传输AR业务，使用业务标识7来传输游戏业务，即业务标识6对应AR业务，业务标识7对应游戏业务。
S603、接入点向第一站点发送第三无线帧。相应的，第一站点接收来自接入点的第三无线帧。
其中，第三无线帧指示同意第一站点加入受限的TWT SP对应的受限的TWT协议。或者说，第三无线帧指示同意第一站点在该受限的TWT SP内传输至少一个请求业务标识对应的业务。
可选的，第三无线帧可以是对第二无线帧的响应。示例性的，其可以为TWT建立响应(TWT setup response)帧，或者可以为TWT建立帧(TWT setup frame)，或者，可以为保护的TWT建立帧(Protected TWT setup frame)。当然，还可以为其他类型的帧，不予限制。
可选的，接入点在收到第二无线帧后，可以先向第一站点发送确认(acknowledgement，ACK)帧，以指示接入点成功接收第二无线帧。确认帧之后，可以继续发送该第三无线帧。类似的，第一站点在接收到第三无线帧后，可以向接入点发送确认帧，以指示第一站点成功接收第三无线帧。
本申请中，由接入点指示允许在受限的TWT SP中使用的候选业务标识。站点在请求加入受限的TWT时，从接入点指示的候选业务标识中选择一个或多个业务标识，站点选择的业务标识对应的业务即为站点请求在受限的TWT SP中传输的业务。接入点收到站点的加入受限的TWT的请求后，可以同意站点加入该受限的TWT，从而在受限的TWT SP中传输站点选择的业务标识对应的业务。也就是说，本申请中由接入点限定在受限的TWT SP中传输时使用的业务标识，相比于由站点确定业务标识的方法，可以尽可能的限制站点在受限的TWT SP中随意传输业务，从而提高各个站点间的业务公平性，提高低时延业务的服务质量。
示例性的，由站点确定业务标识时，站点可以在请求加入受限的TWT时指示业务标识。由于接入点可能不感知哪些是低时延业务的标识，从而站点可能会将某些非低时延业务的业务标识声称为低时延业务的业务标识，从而在受限的TWT SP内传输。即站点可能在TWT SP内随意传输业务，这对其他站点来说是不公平的。此外，若所有站点都在受限的TWT SP内随意传输，也无法保证低时延业务的时延。而在本申请的方案中，由接入点对受限的TWT SP内传输的业务或使用的业务标识进行限制，从而可以限制站点的随意传输，保证业务公平性，提高服务质量。
可选的，在一些实施场景中，图6所示的基于目标唤醒时间的通信方法还可以包括如下步骤：
S604、接入点和第一站点在受限的TWT SP内传输至少一个请求业务标识对应的业务。
可选的，步骤S604中的传输可以包括接收和/或发送。例如，在至少一个请求业务标识包括上行业务标识时，步骤S604可以包括：第一站点在受限的TWT SP内发送上行业务，相应的，接入点在受限的TWT SP内接收上行业务。在至少一个请求业务标识包括下行业务标识时，步骤S604可以包括：接入点在受限的TWT SP内发送下行业务，相应的，第一站点在受限的TWT SP内接收下行业务。
可选的，在至少一个请求业务标识对应的业务传输完成后，该方法还可以包括如下步骤S605：
S605、接入点和第一站点在受限的TWT服务时间内传输第一业务。其中，至少一个候选业务标识包括所述第一业务的业务标识。
示例性的，以至少一个候选业务标识包括4-7，至少一个请求业务标识包括6、7为例，在业务标识6、7对应的业务传输完成后，可以在受限的TWT SP内传输业务标识为4-7之外(例如2)的业务。
基于该方案，在请求业务标识对应的业务传输完成后，还可以继续传输其他业务，从而有效利用受限的TWT SP，降低资源浪费。
以上方案可以理解为在受限的TWT协议建立完成之后执行的方案。此外，本申请还提供一种基于目标唤醒时间的通信方法，用于建立受限的TWT协议。在站点需要使用受限的TWT机制，但接入点未在信标帧中携带受限的TWT信息元素时，站点可以请求接入点建立受限的TWT，以便传输业务。
下面对该方法进行详细介绍。如图9所示，该基于目标唤醒时间的通信方法包括如下步骤：
S901、站点向接入点发送第一无线帧。相应的，接入点接收来自站点的第一无线帧。
其中，第一无线帧包括请求信息，该请求信息用于请求建立受限的TWT协议。
S902、接入点向站点发送第二无线帧。相应的，站点接收来自接入点的第二无线帧。
其中，第二无线帧包括第一TWT信息元素，第一TWT信息元素对应受限的TWT协议。或者说，第一TWT信息元素指示受限的TWT协议的参数，该参数用于指示受限的TWT SP。
可选的，接入点向站点发送第二无线帧后，可以认为新的受限的TWT协议建立完成。此外，可以认为该站点已经加入了新建立的受限的TWT协议。也就是说，该站点收到第二无线帧后，无需再向接入点发送消息以请求加入新建立的受限的TWT协议，即可在受限的TWT SP内传输业务。
可选的，上述步骤S901中，第一无线帧可以包括第二TWT信息元素。站点可以将第二TWT信息元素中的请求类型字段包括的广播TWT推荐字段设置为4，表示受限的TWT。并且，将第二TWT信息元素中的控制字段包括的协商类型字段设置为3，表示请求加入TWT协议。
可选的，上述步骤S901中，请求信息可以携带在第二TWT信息元素的第一字段中。
作为一种可能的实现，如图10所示，第一字段可以广播TWT信息字段中的广播TWT标识字段。该场景下，请求信息可以为预设的广播TWT标识。
可选的，预设的广播TWT标识可以是协议预定义的。或者，可以是接入点向站点预先发送的。或者，可以是接入点和站点协商的，不予限制。示例性的，该预设的广播TWT标识可以为0或31，或其他值，本申请对此不做具体限定。
可选的，该场景下广播TWT标识字段也可以有其他名称，例如，“新TWT请求(New TWT Request)”字段，本申请对此不做具体限定。
作为另一种可能的实现，如图11所示，广播TWT信息字段包括受限的业务信息存在字段和广播TWT标识字段，第一字段位于受限的业务信息存在字段和广播TWT标识字段之间。
可选的，该第一字段占用的比特可以是图3所示的预留字段中的一部分，即图11中的广播TWT信息字段中的预留字段的大小小于图3所示的预留字段的大小。
可选的，该场景下，第一字段也可以称为“新TWT请求(New TWT Request)”字段，或者“新受限的TWT请求(New Restricted TWT Request)”字段。当然，第一字段也可以有其他名称，不予限制。
可选的，上述步骤S902中，第一TWT信息元素的结构可参考图3。例如，可以通过目标唤醒时间字段指示TWW SP到来的时间，由标称最小TWT唤醒持续时间字段指示TWT SP的时长，由TWT唤醒间隔小数字段和TWT唤醒间隔指数字段指示两个TWT SP之间的间隔。
可选的，第一TWT信息元素中广播TWT标识字段中的广播TWT标识可以和前述预设的广播TWT标识不同。也就是说，最终建立的受限的TWT的广播TWT标识由第一TWT信息元素中的广播TWT标识字段确定。
基于该方案，站点可以向接入点请求建立受限的TWT协议，接入点可以响应该请求向站点发送第一TWT信息元素，使得站点可以在受限的TWT SP内传输业务，降低业务的传输时延。
需要说明的是，上述图6和图9所示的实施例可以相互结合以形成新的实施例。作为一种可能的实现，该新的实施例可以如图12所示。作为另一种可能的实现，该新的实施例可以如图13所示。
参见图12，为本申请实施例提供的又一种基于目标唤醒时间的通信方法，该通信方法包括：
S1201～S1203、与上述步骤S601～S603相同，可参考上述步骤S601～S603的相关说明，在此不再赘述。
可选的，在步骤S1201之前，基于目标唤醒时间的通信方法还可以包括：
S1200、第二站点向接入点发送第四无线帧。相应的，接入点接收来自第二站点的第四无线帧。
其中，第四无线帧包括请求信息，该请求信息用于请求建立步骤S1203中所述的受限的TWT协议。可选的，接入点在收到第四无线帧后，可以同意该请求，即执行步骤S1201。
可选的，第二站点和第一站点可以为不同的站点。该场景下，接入点在收到第四无线帧后，还可以向第二站点发送第五无线帧，该第五无线帧中可以携带步骤S601所述的第一TWT信息元素，以向第二站点指示受限的TWT SP。
或者，第二站点和第一站点可以为相同的站点。该场景下，接入点在收到第四无线帧后，可以发送第一无线帧，无需向第一站点再发送第五无线帧。
可选的，第四无线帧可以包括第二TWT信息元素，请求信息可以携带在第二TWT信息元素的第一字段中。第一字段可参考上述步骤S901中的相关说明，在此不再赘述。
可选的，在步骤S1203之后，基于目标唤醒时间的通信方法还可以包括：
S1204～S1205、与上述步骤S604～S605相同，可参考上述步骤S604～S605的相关说明，在此不再赘述。
参见图13，为本申请实施例提供的再一种基于目标唤醒时间的通信方法，该通信方法包括：
S1301～S1302、与上述步骤S901～S902相同，可参考上述步骤S901～S902的相关说明， 在此不再赘述。
可选的，在步骤S1302之后，该方法还可以包括：
S1303、接入点广播第三无线帧。相应的，站点可以接收来自接入点的第三无线帧。
作为一种可能的实现，第三无线帧包括受限的TWT IE，用于声明新建的受限的TWT。其中，受限的TWT IE的结构可参考图3，在此不再赘述。
基于该可能的实现，由于受限的TWT为广播TWT，通过广播第三无线帧可以使得更多站点加入该受限的TWT，从而提高受限的TWT SP的利用率，提高资源利用率。
作为另一种可能的实现，第三无线帧包括第一业务标识信息。该第一业务标识信息指示至少一个候选业务标识，候选业务标识对应的业务为允许在受限的TWT协议对应的受限的TWT SP内传输的业务。第一业务标识信息可参考上述步骤S601中的相关说明，在此不再赘述。
可选的，该可能的实现中，步骤S1301中，站点向接入点发送的第一无线帧可以包括第二业务标识信息，第二业务标识信息指示至少一个请求业务标识。请求业务标识对应的业务为该站点请求在受限的TWT SP内传输的业务。其中，上述至少一个候选业务标识包括至少一个请求业务标识。
示例性的，第二业务标识信息指示的至少一个请求业务标识可以为6、7，那么第一业务标识信息指示的至少一个候选业务标识为4-7。
可选的，该可能的实现中，在步骤S1301中向接入点发送请求信息的站点收到第三无线帧后，也可以在受限的TWT SP内传输第二业务标识信息未指示的，但是为候选业务标识的标识对应的业务。示例性的，以第二业务标识信息指示的至少一个请求业务标识为6、7，第一业务标识信息指示的至少一个候选业务标识为4-7为例，该站点也可以在受限的TWT SP内传输标识为4和/或5的业务。
可选的，未请求建立受限的TWT SP的站点(未向接入点发送请求信息的站点)在收到第三无线帧后，可以执行图6所示实施例中的第一站点的动作，以加入该受限的TWT，并在受限的TWT SP内传输接入点允许传输的业务。
需要说明的是，图12和图13仅是示例性的说明图6和图9的结合，当然还可以有其他结合形式，本申请对此不做具体限定。
可以理解的是，以上各个实施例中，由接入点实现的方法和/或步骤，也可以由可用于该接入点的部件(例如芯片或者电路)实现；由站点实现的方法和/或步骤，也可以有可用于该站点的部件(例如芯片或者电路)实现。
上述主要从各个设备之间交互的角度对本申请提供的方案进行了介绍。相应的，本申请还提供了通信装置，该通信装置用于实现上述各种方法。该通信装置可以为上述方法实施例中的接入点，或者包含上述接入点的装置，或者为可用于接入点的部件；或者，该通信装置可以为上述方法实施例中的站点，或者包含上述站点的装置，或者为可用于站点的部件。
可以理解的是，该通信装置为了实现上述功能，其包含了执行各个功能相应的硬件结构和/或软件模块。本领域技术人员应该很容易意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，本申请能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
本申请实施例可以根据上述方法实施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。
在一种实施场景下，以通信装置为上述方法实施例中的接入点为例，图14示出了一种接入点140的结构示意图。该接入点140包括发送模块1401和接收模块1402。发送模块1401和接收模块1402可以统称为收发模块。
可选的，发送模块1401，也可以称为发送单元。该发送模块1401，可以包括发送电路、发送机、发送器或者通信接口。接收模块1402，也可以称为接收单元。该接收模块1402可以包括接收电路、接收机、接收器或者通信接口。
可选的，该接入点140还可以包括处理模块1403。进一步的，该接入点140还可以包括存储模块(图14中未示出)，用于存储计算机程序或指令。
可选的，发送模块1401可以用于执行上述方法实施例中由接入点执行的发送类的步骤，和/或用于支持本文所描述的技术的其它过程；接收模块1402可以用于执行上述方法实施例中由接入点执行的接收类的步骤，和/或用于支持本文所描述的技术的其它过程；处理模块1403，可以用于执行上述方法实施例中由接入点执行的处理类(例如生成、确定等)的步骤，和/或用于支持本文所描述的技术的其它过程。
作为一种可能的实现：
发送模块1401，用于发送第一无线帧，第一无线帧包括第一业务标识信息，第一业务标识信息指示至少一个候选业务标识，候选业务标识对应的业务为允许在受限的目标唤醒时间TWT服务时间内传输的业务；
接收模块1402用于接收来自第一站点的第二无线帧，第二无线帧包括第二业务标识信息，第二业务标识信息指示至少一个请求业务标识，请求业务标识对应的业务为第一站点请求在受限的TWT服务时间内传输的业务，至少一个请求业务标识为至少一个候选业务标识的子集；
发送模块1401，还用于向第一站点发送第三无线帧，第三无线帧指示同意第一站点加入受限的TWT服务时间对应的受限的TWT协议。
可选的，接收模块1402，还用于接收来自第二站点的第四无线帧，第四无线帧包括请求信息，请求信息用于请求建立受限的TWT协议。
作为另一种可能的实现：
接收模块1402，用于接收来自站点的第一无线帧，第一无线帧包括请求信息，请求信息用于请求建立受限的目标唤醒时间TWT协议；
发送模块1401，用于向站点发送第二无线帧，第二无线帧包括第一TWT信息元素，第一TWT信息元素对应受限的TWT协议。
可选的，发送模块1401，还用于广播第三无线帧，第三无线帧包括第一业务标识信息，第一业务标识信息指示至少一个候选业务标识，候选业务标识对应的业务为允许在受限的TWT协议对应的受限的TWT服务时间内传输的业务。
其中，上述方法实施例涉及的各步骤的所有相关内容均可以援引到对应功能模块的功能描述，在此不再赘述。
在本申请中，该接入点140以采用集成的方式划分各个功能模块的形式来呈现。这里的“模块”可以指特定专用集成电路(application-specific integrated circuit，ASIC)，电路，执 行一个或多个软件或固件程序的处理器和存储器，集成逻辑电路，和/或其他可以提供上述功能的器件。
在一些实施例中，在硬件实现上，本领域的技术人员可以想到该接入点140可以采用图5所示的WLAN设备500的形式。
作为一种示例，图14中的处理模块1403的功能/实现过程可以通过图5所示的WLAN设备500中的处理器501调用存储器504中存储的计算机执行指令来实现，图14中的接收模块1402和发送模块1401的功能/实现过程可以通过图5所示的WLAN设备500中的收发器502来实现。
在一些实施例中，当图14中的接入点140是芯片或芯片系统时，接收模块1402和发送模块1401的功能/实现过程可以通过芯片或芯片系统的输入输出接口(或通信接口)实现，处理模块1403的功能/实现过程可以通过芯片或芯片系统的处理器(或者处理电路)实现。
由于本实施例提供的接入点140可执行上述方法，因此其所能获得的技术效果可参考上述方法实施例，在此不再赘述。
在一种实施场景下，以通信装置为上述方法实施例中的站点为例，图15示出了一种站点150的结构示意图。该站点150包括发送模块1501和接收模块1502。发送模块1501和接收模块1502可以统称为收发模块。
可选的，发送模块1501，也可以称为发送单元。该发送模块1501，可以包括发送电路、发送机、发送器或者通信接口。接收模块1502，也可以称为接收单元。该接收模块1502可以包括接收电路、接收机、接收器或者通信接口。
可选的，该站点150还可以包括处理模块1503。进一步的，该站点150还可以包括存储模块(图15中未示出)，用于存储计算机程序或指令。
可选的，发送模块1501可以用于执行上述方法实施例中由站点执行的发送类的步骤，和/或用于支持本文所描述的技术的其它过程；接收模块1502可以用于执行上述方法实施例中由站点执行的接收类的步骤，和/或用于支持本文所描述的技术的其它过程；处理模块1503，可以用于执行上述方法实施例中由站点执行的处理类(例如生成、确定等)的步骤，和/或用于支持本文所描述的技术的其它过程。
作为一种可能的实现：
接收模块1502，用于接收来自接入点的第一无线帧，第一无线帧包括第一业务标识信息，第一业务标识信息指示至少一个候选业务标识，候选业务标识对应的业务为允许在受限的目标唤醒时间TWT服务时间内传输的业务；
发送模块1501，用于向接入点发送第二无线帧，第二无线帧包括第二业务标识信息，第二业务标识信息指示至少一个请求业务标识，请求业务标识对应的业务为请求在受限的TWT服务时间内传输的业务，至少一个请求业务标识为至少一个候选业务标识的子集；
接收模块1502，还用于接收来自接入点的第三无线帧，第三无线帧指示同意加入受限的TWT服务时间对应的受限的TWT协议。
作为另一种可能的实现：
发送模块1501，用于向接入点发送第一无线帧，第一无线帧包括请求信息，请求信息用于请求建立受限的目标唤醒时间TWT协议；
接收模块1502，用于接收来自接入点的第二无线帧，第二无线帧包括第一TWT信息元素，第一TWT信息元素对应受限的TWT协议。
可选的，接收模块1502，还用于接收来自接入点的第三无线帧，第三无线帧包括第一业 务标识信息，第一业务标识信息指示至少一个候选业务标识，候选业务标识对应的业务为允许在受限的TWT协议对应的受限的TWT服务时间内传输的业务。
其中，上述方法实施例涉及的各步骤的所有相关内容均可以援引到对应功能模块的功能描述，在此不再赘述。
在本申请中，该站点150以采用集成的方式划分各个功能模块的形式来呈现。这里的“模块”可以指特定专用集成电路(application-specific integrated circuit，ASIC)，电路，执行一个或多个软件或固件程序的处理器和存储器，集成逻辑电路，和/或其他可以提供上述功能的器件。
在一些实施例中，在硬件实现上，本领域的技术人员可以想到该站点150可以采用图5所示的WLAN设备500的形式。
作为一种示例，图15中的处理模块1503的功能/实现过程可以通过图5所示的WLAN设备500中的处理器501调用存储器504中存储的计算机执行指令来实现，图15中的接收模块1502和发送模块1501的功能/实现过程可以通过图5所示的WLAN设备500中的收发器502来实现。
在一些实施例中，当图15中的站点150是芯片或芯片系统时，接收模块1502和发送模块1501的功能/实现过程可以通过芯片或芯片系统的输入输出接口(或通信接口)实现，处理模块1503的功能/实现过程可以通过芯片或芯片系统的处理器(或者处理电路)实现。
由于本实施例提供的站点150可执行上述方法，因此其所能获得的技术效果可参考上述方法实施例，在此不再赘述。
在一些实施例中，本申请实施例还提供一种通信装置，该通信装置包括处理器，用于实现上述任一方法实施例中的方法。
作为一种可能的实现方式，该通信装置还包括存储器。该存储器，用于保存必要的计算机程序或指令，处理器可以调用存储器中存储的计算机程序或指令以指令该通信装置执行上述任一方法实施例中的方法。当然，存储器也可以不在该通信装置中。
作为另一种可能的实现方式，该通信装置还包括接口电路，该接口电路为代码/数据读写接口电路，该接口电路用于接收计算机执行指令(计算机执行指令存储在存储器中，可能直接从存储器读取，或可能经过其他器件)并传输至该处理器。
作为又一种可能的实现方式，该通信装置还包括通信接口，该通信接口用于与该通信装置之外的模块通信。
可以理解的是，该通信装置可以是芯片或芯片系统，该通信装置是芯片系统时，芯片系统可以包括芯片，也可以包含芯片和其他分立器件，本申请实施例对此不作具体限定。
在一些实施例中，本申请实施例还提供了一种通信装置，该通信装置包括接口电路和逻辑电路，该接口电路用于输入信息和/或输出信息；该逻辑电路，用于执行上述任一方法实施例中的方法，根据输入的信息进行处理和/或生成输出的信息。
作为一种可能的实现，该通信装置用于实现上述图6所示流程中的接入点的功能时：
可选的，输入的信息包括：第二无线帧，该第二无线帧包括第二业务标识信息，第二业务标识信息指示至少一个请求业务标识，请求业务标识对应的业务为第一站点请求在受限的TWT服务时间内传输的业务，至少一个请求业务标识为至少一个候选业务标识的子集。相应的，根据输入的信息进行处理，包括：向第一站点发送第三无线帧，第三无线帧指示同意第一站点加入受限的TWT服务时间对应的受限的TWT协议。
可选的，输入的信息包括：第四无线帧，该第四无线帧包括请求信息，该请求信息用于 请求建立受限的TWT协议。相应的，根据输入的信息进行处理，包括：发送第一无线帧，第一无线帧包括第一业务标识信息，第一业务标识信息指示至少一个候选业务标识，候选业务标识对应的业务为允许在受限的目标唤醒时间TWT服务时间内传输的业务。
可选的，输出的信息包括第一无线帧和第三无线帧。
作为一种可能的实现，该通信装置用于实现上述图6所示流程中的第一站点的功能时：
可选的，输入的信息包括：第一无线帧，第一无线帧包括第一业务标识信息，第一业务标识信息指示至少一个候选业务标识，候选业务标识对应的业务为允许在受限的目标唤醒时间TWT服务时间内传输的业务。相应的，根据输入的信息进行处理，包括：发送第二无线帧，该第二无线帧包括第二业务标识信息，第二业务标识信息指示至少一个请求业务标识，请求业务标识对应的业务为第一站点请求在受限的TWT服务时间内传输的业务，至少一个请求业务标识为至少一个候选业务标识的子集。
可选的，输入的信息包括第三无线帧，第三无线帧指示同意第一站点加入受限的TWT服务时间对应的受限的TWT协议。相应的，根据输入的信息进行处理，包括：在受限的TWT服务时间内传输至少一个请求业务标识对应的业务。
作为一种可能的实现，该通信装置用于实现上述图9所示流程中的第一站点的功能时：
可选的，输入的信息包括第一无线帧，第一无线帧包括请求信息，请求信息用于请求建立受限的目标唤醒时间TWT协议。相应的，根据输入的信息进行处理，包括：向站点发送第二无线帧，第二无线帧包括第一TWT信息元素，第一TWT信息元素对应受限的TWT协议。
可选的，输出的信息包括第二无线帧和第三无线帧。第三无线帧包括第一业务标识信息，第一业务标识信息指示至少一个候选业务标识，候选业务标识对应的业务为允许在受限的TWT协议对应的受限的TWT服务时间内传输的业务。
作为一种可能的实现，该通信装置用于实现上述图9所示流程中的站点的功能时：
可选的，输出的信息包括第一无线帧，第一无线帧包括请求信息，请求信息用于请求建立受限的目标唤醒时间TWT协议。
可选的，输入的信息包括第二无线帧，第二无线帧包括第一TWT信息元素，第一TWT信息元素对应受限的TWT协议。相应的，根据第二无线帧进行处理，包括：在受限的TWT服务时间内传输业务。
作为一种可能的产品形态，本申请实施例所述的接入点和站点，还可以使用下述来实现：一个或多个现场可编程门阵列(field programmable gate array，FPGA)、可编程逻辑器件(programmable logic device，PLD)、控制器、状态机、门逻辑、分立硬件部件、任何其它适合的电路、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。
作为一另种可能的产品形态，本申请实施例所述的接入点和站点，可以由一般性的总线体系结构来实现。
为了便于说明，参见图16，图16是本申请实施例提供的通信装置1600的结构示意图，该通信装置1600包括处理器1601和收发器1602。该通信装置1600可以为接入点或站点，或其中的芯片。图16仅示出了通信装置1600的主要部件。除处理器1601和收发器1602之外，所述通信装置还可以进一步包括存储器1603、以及输入输出装置(图未示意)。
其中，处理器1601主要用于对通信协议以及通信数据进行处理，以及对整个通信装置进行控制，执行软件程序，处理软件程序的数据。存储器1603主要用于存储软件程序和数据。收发器1602可以包括射频电路和天线，射频电路主要用于基带信号与射频信号的转换以及对 射频信号的处理。天线主要用于收发电磁波形式的射频信号。输入输出装置，例如触摸屏、显示屏，键盘等主要用于接收用户输入的数据以及对用户输出数据。
其中，处理器1601、收发器1602、以及存储器1603可以通过通信总线连接。
当通信装置开机后，处理器1601可以读取存储器1603中的软件程序，解释并执行软件程序的指令，处理软件程序的数据。当需要通过无线发送数据时，处理器1601对待发送的数据进行基带处理后，输出基带信号至射频电路，射频电路将基带信号进行射频处理后将射频信号通过天线以电磁波的形式向外发送。当有数据发送到通信装置时，射频电路通过天线接收到射频信号，将射频信号转换为基带信号，并将基带信号输出至处理器1601，处理器1601将基带信号转换为数据并对该数据进行处理。
在另一种实现中，所述的射频电路和天线可以独立于进行基带处理的处理器而设置，例如在分布式场景中，射频电路和天线可以与独立于通信装置，呈拉远式的布置。
本申请还提供了一种计算机可读存储介质，其上存储有计算机程序或指令，该计算机程序或指令被处理器执行时实现上述任一方法实施例的功能。
本申请还提供了一种计算机程序产品，该计算机程序产品被处理器执行时实现上述任一方法实施例的功能。
本领域普通技术人员可以理解，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
可以理解，本申请中描述的系统、装置和方法也可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，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，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，即可以位于一个地方，或者也可以分布到多个网络单元上。作为单元显示的部件可以是或者也可以不是物理单元。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件程序实现时，可以全部或部分地以计算机程序产品的形式来实现。该计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行计算机程序或指令时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或者数据中心通过有线(例如同轴电缆、光纤、数字用户线(digital subscriber line，DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可以用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(例如，软盘、硬盘、磁带)，光介质(例如，DVD)、或者半导体介质(例如固态硬盘(solid state disk，SSD))等。本申请实施例中,计算机可以包括前面所述的装置。
尽管在此结合各实施例对本申请进行了描述，然而，在实施所要求保护的本申请过程中，本领域技术人员通过查看所述附图、公开内容、以及所附权利要求书，可理解并实现所述公开实施例的其他变化。在权利要求中，“包括”(comprising)一词不排除其他组成部分或步骤，“一”或“一个”不排除多个的情况。单个处理器或其他单元可以实现权利要求中列举的若干项功能。相互不同的从属权利要求中记载了某些措施，但这并不表示这些措施不能组合起来产生良好的效果。
尽管结合具体特征及其实施例对本申请进行了描述，显而易见的，在不脱离本申请的精神和范围的情况下，可对其进行各种修改和组合。相应地，本说明书和附图仅仅是所附权利要求所界定的本申请的示例性说明，且视为已覆盖本申请范围内的任意和所有修改、变化、组合或等同物。显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的精神和范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (37)

  1. 一种基于目标唤醒时间的通信方法，其特征在于，所述方法包括：
    发送第一无线帧，所述第一无线帧包括第一业务标识信息，所述第一业务标识信息指示至少一个候选业务标识，所述候选业务标识对应的业务为允许在受限的目标唤醒时间TWT服务时间内传输的业务；
    接收来自第一站点的第二无线帧，所述第二无线帧包括第二业务标识信息，所述第二业务标识信息指示至少一个请求业务标识，所述请求业务标识对应的业务为所述第一站点请求在所述受限的TWT服务时间内传输的业务，所述至少一个请求业务标识为所述至少一个候选业务标识的子集；
    向所述第一站点发送第三无线帧，所述第三无线帧指示同意所述第一站点加入所述受限的TWT服务时间对应的受限的TWT协议。
  2. 根据权利要求1所述的方法，其特征在于，所述方法还包括：
    接收来自第二站点的第四无线帧，所述第四无线帧包括请求信息，所述请求信息用于请求建立所述受限的TWT协议。
  3. 根据权利要求2所述的方法，其特征在于，所述第四无线帧包括第二TWT信息元素，所述请求信息携带在所述第二TWT信息元素的第一字段中。
  4. 根据权利要求3所述的方法，其特征在于，所述第二TWT信息元素包括广播TWT信息字段；
    所述第一字段为所述广播TWT信息字段中的广播TWT标识字段；或者，
    所述广播TWT信息字段包括受限的业务信息存在字段和广播TWT标识字段，所述第一字段位于所述受限的业务信息存在字段和所述广播TWT标识字段之间。
  5. 根据权利要求4所述的方法，其特征在于，所述第一字段为所述广播TWT标识字段，所述请求信息为预设的广播TWT标识。
  6. 一种基于目标唤醒时间的通信方法，其特征在于，所述方法包括：
    接收来自接入点的第一无线帧，所述第一无线帧包括第一业务标识信息，所述第一业务标识信息指示至少一个候选业务标识，所述候选业务标识对应的业务为允许在受限的目标唤醒时间TWT服务时间内传输的业务；
    向所述接入点发送第二无线帧，所述第二无线帧包括第二业务标识信息，所述第二业务标识信息指示至少一个请求业务标识，所述请求业务标识对应的业务为第一站点请求在所述受限的TWT服务时间内传输的业务，所述至少一个请求业务标识为所述至少一个候选业务标识的子集；
    接收来自所述接入点的第三无线帧，所述第三无线帧指示同意所述第一站点加入所述受限的TWT服务时间对应的受限的TWT协议。
  7. 根据权利要求1-6任一项所述的方法，其特征在于，所述第一业务标识信息包括上行业务标识位图，和/或，下行业务标识位图；
    其中，所述上行业务标识位图指示所述至少一个候选业务标识中的上行业务标识，所述下行业务标识位图指示所述至少一个候选业务标识中的下行业务标识。
  8. 根据权利要求7所述的方法，其特征在于，所述第一无线帧包括第一TWT信息元素，所述第一TWT信息元素中的受限的TWT业务信息字段包括受限的TWT上行业务标识位图字段和受限的TWT下行业务标识位图字段，所述上行业务标识位图携带在所述受限的TWT上行业务标识位图字段中，所述下行业务标识位图携带在所述受限的TWT下行业务标识位 图字段中。
  9. 根据权利要求8所述的方法，其特征在于，所述受限的TWT业务信息字段包括业务控制信息字段，所述业务控制信息字段包括上行业务标识位图有效字段和下行业务标识位图有效字段，所述上行业务标识位图有效字段指示所述第一业务标识信息是否包括所述上行业务标识位图，所述下行业务标识位图有效字段指示所述第一业务标识信息是否包括所述下行业务标识位图。
  10. 根据权利要求1-9任一项所述的方法，其特征在于，所述方法还包括：
    在所述受限的TWT服务时间内传输所述至少一个请求业务标识对应的业务。
  11. 根据权利要求10所述的方法，其特征在于，所述方法还包括：
    所述至少一个请求业务标识对应的业务传输完成后，在所述受限的TWT服务时间内传输第一业务，所述至少一个候选业务标识不包括所述第一业务的业务标识。
  12. 一种通信装置，其特征在于，所述通信装置包括：发送模块和接收模块；
    所述发送模块，用于发送第一无线帧，所述第一无线帧包括第一业务标识信息，所述第一业务标识信息指示至少一个候选业务标识，所述候选业务标识对应的业务为允许在受限的目标唤醒时间TWT服务时间内传输的业务；
    所述接收模块，用于接收来自第一站点的第二无线帧，所述第二无线帧包括第二业务标识信息，所述第二业务标识信息指示至少一个请求业务标识，所述请求业务标识对应的业务为所述第一站点请求在所述受限的TWT服务时间内传输的业务，所述至少一个请求业务标识为所述至少一个候选业务标识的子集；
    所述发送模块，还用于向所述第一站点发送第三无线帧，所述第三无线帧指示同意所述第一站点加入所述受限的TWT服务时间对应的受限的TWT协议。
  13. 根据权利要求12所述的通信装置，其特征在于，所述接收模块，还用于接收来自第二站点的第四无线帧，所述第四无线帧包括请求信息，所述请求信息用于请求建立所述受限的TWT协议。
  14. 根据权利要求13所述的通信装置，其特征在于，所述第四无线帧包括第二TWT信息元素，所述请求信息携带在所述第二TWT信息元素的第一字段中。
  15. 根据权利要求14所述的通信装置，其特征在于，所述第二TWT信息元素包括广播TWT信息字段；
    所述第一字段为所述广播TWT信息字段中的广播TWT标识字段；或者，
    所述广播TWT信息字段包括受限的业务信息存在字段和广播TWT标识字段，所述第一字段位于所述受限的业务信息存在字段和所述广播TWT标识字段之间。
  16. 根据权利要求15所述的通信装置，其特征在于，所述第一字段为所述广播TWT标识字段，所述请求信息为预设的广播TWT标识。
  17. 一种通信装置，其特征在于，所述通信装置包括：发送模块和接收模块；
    所述接收模块，用于接收来自接入点的第一无线帧，所述第一无线帧包括第一业务标识信息，所述第一业务标识信息指示至少一个候选业务标识，所述候选业务标识对应的业务为允许在受限的目标唤醒时间TWT服务时间内传输的业务；
    所述发送模块，用于向所述接入点发送第二无线帧，所述第二无线帧包括第二业务标识信息，所述第二业务标识信息指示至少一个请求业务标识，所述请求业务标识对应的业务为请求在所述受限的TWT服务时间内传输的业务，所述至少一个请求业务标识为所述至少一个候选业务标识的子集；
    所述接收模块，还用于接收来自所述接入点的第三无线帧，所述第三无线帧指示同意加入所述受限的TWT服务时间对应的受限的TWT协议。
  18. 根据权利要求12-17任一项所述的通信装置，其特征在于，所述第一业务标识信息包括上行业务标识位图，和/或，下行业务标识位图；
    其中，所述上行业务标识位图指示所述至少一个候选业务标识中的上行业务的业务标识，所述下行业务标识位图指示所述至少一个候选业务标识中的下行业务的业务标识。
  19. 根据权利要求18所述的通信装置，其特征在于，所述第一无线帧包括第一TWT信息元素，所述第一TWT信息元素中的受限的TWT业务信息字段包括受限的TWT上行业务标识位图字段和受限的TWT下行业务标识位图字段，所述上行业务标识位图携带在所述受限的TWT上行业务标识位图字段中，所述下行业务标识位图携带在所述受限的TWT下行业务标识位图字段中。
  20. 根据权利要求19所述的通信装置，其特征在于，所述受限的TWT业务信息字段包括业务控制信息字段，所述业务控制信息字段包括上行业务标识位图有效字段和下行业务标识位图有效字段，所述上行业务标识位图有效字段指示所述第一业务标识信息是否包括所述上行业务标识位图，所述下行业务标识位图有效字段指示所述第一业务标识信息是否包括所述下行业务标识位图。
  21. 根据权利要求12-20任一项所述的通信装置，其特征在于，所述发送模块和/或所述接收模块，还用于在所述受限的TWT服务时间内传输所述至少一个请求业务标识对应的业务。
  22. 根据权利要求21所述的通信装置，其特征在于，所述至少一个请求业务标识对应的业务传输完成后，所述发送模块和/或所述接收模块，在所述受限的TWT服务时间内传输第一业务，所述至少一个候选业务标识不包括所述第一业务的业务标识。
  23. 一种基于目标唤醒时间的通信方法，其特征在于，所述方法包括：
    接收来自站点的第一无线帧，所述第一无线帧包括请求信息，所述请求信息用于请求建立受限的目标唤醒时间TWT协议；
    向所述站点发送第二无线帧，所述第二无线帧包括第一TWT信息元素，所述第一TWT信息元素对应所述受限的TWT协议。
  24. 根据权利要求23所述的方法，其特征在于，所述方法还包括：
    广播第三无线帧，所述第三无线帧包括第一业务标识信息，所述第一业务标识信息指示至少一个候选业务标识，所述候选业务标识对应的业务为允许在所述受限的TWT协议对应的受限的TWT服务时间内传输的业务。
  25. 一种基于目标唤醒时间的通信方法，其特征在于，所述方法包括：
    向接入点发送第一无线帧，所述第一无线帧包括请求信息，所述请求信息用于请求建立受限的目标唤醒时间TWT协议；
    接收来自所述接入点的第二无线帧，所述第二无线帧包括第一TWT信息元素，所述第一TWT信息元素对应所述受限的TWT协议。
  26. 根据权利要求25所述的方法，其特征在于，所述方法还包括：
    接收来自所述接入点的第三无线帧，所述第三无线帧包括第一业务标识信息，所述第一业务标识信息指示至少一个候选业务标识，所述候选业务标识对应的业务为允许在所述受限的TWT协议对应的受限的TWT服务时间内传输的业务。
  27. 一种通信装置，其特征在于，所述通信装置包括：发送模块和接收模块；
    所述接收模块，用于接收来自站点的第一无线帧，所述第一无线帧包括请求信息，所述请求信息用于请求建立受限的目标唤醒时间TWT协议；
    所述发送模块，用于向所述站点发送第二无线帧，所述第二无线帧包括第一TWT信息元素，所述第一TWT信息元素对应所述受限的TWT协议。
  28. 根据权利要求27所述的通信装置，其特征在于，所述发送模块，还用于广播第三无线帧，所述第三无线帧包括第一业务标识信息，所述第一业务标识信息指示至少一个候选业务标识，所述候选业务标识对应的业务为允许在所述受限的TWT协议对应的受限的TWT服务时间内传输的业务。
  29. 一种通信装置，其特征在于，所述通信装置包括：发送模块和接收模块；
    所述发送模块，用于向接入点发送第一无线帧，所述第一无线帧包括请求信息，所述请求信息用于请求建立受限的目标唤醒时间TWT协议；
    所述接收模块，用于接收来自所述接入点的第二无线帧，所述第二无线帧包括第一TWT信息元素，所述第一TWT信息元素对应所述受限的TWT协议。
  30. 根据权利要求29所述的通信装置，其特征在于，所述接收模块，还用于接收来自所述接入点的第三无线帧，所述第三无线帧包括第一业务标识信息，所述第一业务标识信息指示至少一个候选业务标识，所述候选业务标识对应的业务为允许在所述受限的TWT协议对应的受限的TWT服务时间内传输的业务。
  31. 根据权利要求24、26、28、或30任一项所述的方法或通信装置，其特征在于，所述第一无线帧还包括第二业务标识信息，所述第二业务标识信息指示至少一个请求业务标识，所述请求业务标识对应的业务为所述站点请求在所述受限的TWT服务时间内传输的业务，所述至少一个候选业务标识包括所述至少一个请求业务标识。
  32. 根据权利要求23-31任一项所述的方法或通信装置，其特征在于，所述第一无线帧包括第二TWT信息元素，所述请求信息携带在所述第二TWT信息元素的第一字段中。
  33. 根据权利要求32所述的方法或通信装置，其特征在于，所述第二TWT信息元素包括广播TWT信息字段；
    所述第一字段为所述广播TWT信息字段中的广播TWT标识字段；或者，
    所述广播TWT信息字段包括受限的业务信息存在字段和广播TWT标识字段，所述第一字段位于所述受限的业务信息存在字段和所述广播TWT标识字段之间。
  34. 根据权利要求33所述的方法或通信装置，其特征在于，所述第一字段为所述广播TWT标识字段，所述请求信息为预设的广播TWT标识。
  35. 一种通信装置，其特征在于，所述通信装置包括：处理器；
    所述处理器用于执行计算机执行指令，以使如权利要求1-11中任一项所述的方法被实现，或者，以使如权利要求23-26中任一项所述的方法被实现。
  36. 一种计算机可读存储介质，其特征在于，包括指令，当所述指令在通信装置上运行时，以使如权利要求1-11中任一项所述的方法被实现，或者，以使如权利要求23-26中任一项所述的方法被实现。
  37. 一种计算机程序产品，其特征在于，所述计算机程序产品包括计算机指令；当部分或全部所述计算机指令在计算机上运行时，使得如权利要求1-11中任一项所述的方法被执行，或者，使得如权利要求23-26中任一项所述的方法被执行。
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