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WO2017143856A1 - 用于无线局域网的通信方法和装置 - Google Patents

用于无线局域网的通信方法和装置 Download PDF

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Publication number
WO2017143856A1
WO2017143856A1 PCT/CN2016/112605 CN2016112605W WO2017143856A1 WO 2017143856 A1 WO2017143856 A1 WO 2017143856A1 CN 2016112605 W CN2016112605 W CN 2016112605W WO 2017143856 A1 WO2017143856 A1 WO 2017143856A1
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WO
WIPO (PCT)
Prior art keywords
beacon frame
twt
station
access point
indication information
Prior art date
Application number
PCT/CN2016/112605
Other languages
English (en)
French (fr)
Inventor
郭宇宸
杨讯
于健
林梅露
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP16891304.4A priority Critical patent/EP3402256B1/en
Publication of WO2017143856A1 publication Critical patent/WO2017143856A1/zh
Priority to US16/111,179 priority patent/US20190021055A1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0229—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a wanted signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/10—Active monitoring, e.g. heartbeat, ping or trace-route
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
    • H04W52/0216—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave using a pre-established activity schedule, e.g. traffic indication frame
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0248—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal dependent on the time of the day, e.g. according to expected transmission activity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/12—WLAN [Wireless Local Area Networks]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present application relates to the field of communications, and in particular to a communication method and apparatus for a wireless local area network in the field of communications.
  • the 802.11ah standard introduces a target wake time (TWT, Target Wake Time) mechanism.
  • TWT target wake time
  • the site and the access point can agree on the wake-up time, remain active during the wake-up time, and communicate (or exchange data) so that sleep can be performed outside the wake-up time to achieve energy saving.
  • the TWT mechanism is divided into a broadcast type TWT and a request type TWT.
  • the access point broadcasts a TWT information element (IE, Information element) through a beacon frame, and the TWT information element includes the transmission time information of the trigger frame, so that the station performs the transmission time indicated by the TWT information unit. Communicate while sleeping at other times to achieve energy savings.
  • the beacon frame that may be received does not contain the TWT information element, so it is impossible to know.
  • the transmission time of the trigger frame is triggered. At this time, the station can only listen to the channel until it receives the beacon frame containing the TWT information element, which is not conducive to energy saving of the station.
  • the embodiment of the present application provides a communication method and apparatus for a wireless local area network to improve communication efficiency.
  • the first aspect provides a communication method for a wireless local area network, including: receiving, by a station, a first beacon frame sent by an access point, where the first beacon frame includes first indication information, and the first indication information For indicating a transmission time of the second beacon frame, where the second beacon frame is a target call Wake up a beacon frame of the TWT information unit; the station receives the second beacon frame according to the indication of the first indication information.
  • the station first receives the first beacon frame, where the first indication information included in the first beacon frame is used to indicate the sending time of the second beacon frame including the TWT information unit, and the station determines the second according to the indication of the first indication information.
  • the transmission time of the beacon frame so that the second beacon frame including the TWT information unit can be received at the correct time, improving communication efficiency.
  • the first indication information includes a number of beacon frame intervals between the first beacon frame and the second beacon frame.
  • the first beacon frame further includes second indication information, where the second indication information is used to indicate a transmission period of the beacon frame including the TWT information unit.
  • the method further includes: determining, by the station, the target time for sending, by the access point, the trigger frame according to the indication of the TWT information unit in the second beacon frame; The site receives the trigger frame at the target time.
  • a second aspect provides a communication method for a wireless local area network, including: an access point sends a first beacon frame, the first beacon frame includes first indication information, and the first indication information is used to indicate a transmission time of the second beacon frame, wherein the second beacon frame is a beacon frame including a target wake-up time TWT information element; the access point transmits the second beacon frame.
  • the access point first sends a first beacon frame, where the first indication information included in the first beacon frame is used to indicate a sending time of the second beacon frame including the TWT information unit, so as to facilitate the station according to the indication of the first indication information. Determining the transmission time of the second beacon frame, thereby enabling the station to receive the second beacon frame including the TWT information unit at the correct time, improving communication efficiency.
  • the first indication information includes a number of beacon frame intervals between the first beacon frame and the second beacon frame.
  • the first beacon frame further includes second indication information, where the second indication information is used to indicate a transmission period of the beacon frame including the TWT information unit.
  • the method further includes: the access point sending a trigger frame at a target time indicated by the TWT information unit.
  • a communication method for a wireless local area network comprising: a first station entering a first target wake-up time TWT service phase, the first site and the second site being active in the first TWT service phase a state; after the end of the first TWT service phase, the first station waits for a first time interval and enters a second TWT service phase, wherein the first time interval The length of the interval is determined based on whether the first station and the second station communicate during the first TWT service phase.
  • Determining the length of the time interval before the arrival of the next TWT service phase according to whether the first station and the second station communicate in the first TWT service phase, so that the TWT service phase can be adjusted according to the service strength between the first site and the second site.
  • the time interval between them improves communication efficiency.
  • the first time interval is less than or equal to a second time interval
  • the second time interval is the length of the time interval between the first TWT service phase and the adjacent previous TWT service phase.
  • the first time interval is greater than or equal to the second time interval.
  • the second time interval is the length of the time interval between the first TWT service phase and the adjacent previous TWT service phase.
  • a fourth aspect provides a communication method for a wireless local area network, comprising: an access point receiving a request frame from a station, the request frame being used to request to establish a target wake-up time TWT; and the access point sending to the station a response frame, the response frame is used to indicate that the site listens to a target beacon frame, and the target beacon frame is a beacon frame that includes a TWT information unit, so that the station enters a TWT service phase according to the TWT information unit.
  • the access point does not need to receive the power saving polling PS-Poll frame sent by the station, and directly sends downlink data to the station.
  • the access point can directly send downlink data to the site without receiving the PS-Poll frame sent by the station in the TWT service phase, thereby improving communication efficiency.
  • the response frame includes first indication information, where the first indication information is used to indicate whether the station needs to send a PS-Poll frame to the access point in the TWT service phase. .
  • a fifth aspect provides a communication method for a wireless local area network, including: a station sending a request frame to an access point, where the request frame is used to request to establish a target wake-up time TWT; Receiving, by the access point, a response frame, the response frame is used to indicate that the site listens to a target beacon frame, and the target beacon frame is a beacon frame that includes a TWT information element; the station enters according to the TWT information unit.
  • a TWT service phase in the TWT service phase, the station does not need to send a power save polling PS-Poll frame to the access point, and directly receives a downlink from the access point data.
  • the site can receive and send downlink data directly from the access point without receiving the PS-Poll frame to the access point in the TWT service phase. Communication efficiency.
  • the response frame includes first indication information, where the first indication information is used to indicate that the station does not need to send a PS-Poll frame to the access point in the TWT service phase.
  • a site comprising means for performing the method of the first aspect.
  • an access point comprising means for performing the method of the second aspect.
  • a site comprising means for performing the method of the third aspect.
  • an access point is provided, the site comprising means for performing the method of the fourth aspect.
  • a site comprising means for performing the method of the fifth aspect.
  • a site in an eleventh aspect, includes a memory, a processor, and a transceiver.
  • the memory is for storing programs
  • the processor is for executing programs
  • the transceiver is for communicating with other stations.
  • the processor is operative to perform the method of the first aspect when the program is executed.
  • an access point comprising a memory, a processor, and a transceiver.
  • the memory is for storing programs
  • the processor is for executing programs
  • the transceiver is for communicating with other stations.
  • the processor is operative to perform the method of the second aspect when the program is executed.
  • a site in a thirteenth aspect, includes a memory, a processor, and a transceiver.
  • the memory is for storing programs
  • the processor is for executing programs
  • the transceiver is for communicating with other stations.
  • the processor is operative to perform the method of the third aspect when the program is executed.
  • an access point comprising a memory, a processor, and a transceiver.
  • the memory is for storing programs
  • the processor is for executing programs
  • the transceiver is for communicating with other stations.
  • the processor is operative to perform the method of the fourth aspect when the program is executed.
  • a site comprising a memory, a processor, and a transceiver.
  • the memory is for storing programs
  • the processor is for executing programs
  • the transceiver is for communicating with other stations.
  • the processor is operative to perform the method of the fifth aspect when the program is executed.
  • FIG. 1 is a schematic diagram of a prior art broadcast TWT.
  • FIG. 2 is a schematic diagram of a beacon frame in an embodiment of the present application.
  • FIG. 3 is a schematic diagram of a beacon frame according to another embodiment of the present application.
  • FIG. 4 is a schematic diagram of a communication method according to an embodiment of the present application.
  • FIG. 5 is a schematic diagram of a communication method according to another embodiment of the present application.
  • FIG. 6 is a schematic diagram of a station of another embodiment of the present application.
  • FIG. 7 is a schematic diagram of an access point according to another embodiment of the present application.
  • FIG. 8 is a schematic diagram of a station of another embodiment of the present application.
  • FIG. 9 is a schematic diagram of an access point according to another embodiment of the present application.
  • FIG. 10 is a schematic diagram of a station of another embodiment of the present application.
  • FIG. 11 is a schematic diagram of a station of another embodiment of the present application.
  • FIG. 12 is a schematic diagram of an access point according to another embodiment of the present application.
  • FIG. 13 is a schematic diagram of a station of another embodiment of the present application.
  • FIG. 14 is a schematic diagram of an access point according to another embodiment of the present application.
  • 15 is a schematic diagram of a station of another embodiment of the present application.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • UMTS Universal Mobile Telecommunication System
  • WiMAX Worldwide Interoperability for Microwave Access
  • FIG. 1 shows a schematic diagram of a prior art broadcast TWT.
  • the access point directly broadcasts the TWT information element in the beacon frame, indicating that the access point will send a trigger frame (TF, Trigger Frame), and trigger multiple users to perform uplink transmission.
  • the trigger frame may include resource allocation information for triggering multiple users to transmit on the corresponding resource block.
  • the trigger frame may be a Trigger Frame For Random Access (TFR), and the TFR may be used to trigger multi-user randomization using orthogonal frequency division multiple access (OFDMA). Access.
  • TFR Trigger Frame For Random Access
  • OFDMA orthogonal frequency division multiple access
  • the TWT information element carried by the access point in the beacon frame includes information such as the transmission time of the TF or the TFR, so that the station wakes up to communicate at the correct time, and sleeps at other times, thereby saving power. the goal of.
  • beacon frames since not all beacon frames include the TWT information unit, when the station wakes up from the sleep state and needs to upload data to the access point, it is necessary to always monitor the channel. Until the beacon frame including the TWT information element is received, or the station can sleep to the next beacon frame, but the next beacon frame may also not include the beacon frame. The station needs to repeat the steps of sleeping and waking up until the beacon frame including the TWT information element is received, which is not conducive to site energy saving.
  • the first indication information may be included in the beacon frame, where the first indication information may be used to indicate a sending time of the beacon frame including the TWT information unit, for example, the first indication.
  • the information may include a beacon frame interval of the next beacon frame from the next beacon frame including the TWT information element. Therefore, when the station receives the beacon frame, the arrival time of the beacon frame including the TWT information unit can be known, and the station can sleep until the beacon frame including the TWT information unit arrives, and wake up to receive the beacon frame. Thereby, the energy consumption of the site is further saved, and the communication efficiency of the site is improved.
  • the following describes a communication method 100 for a wireless local area network according to an embodiment of the present application, which may be performed by a station and an access point, as described below, the method 100 includes:
  • the access point sends a first beacon frame to the station, where the first beacon frame includes first indication information, where the first indication information is used to indicate a sending time of the second beacon frame, where the
  • the two beacon frame is a beacon frame containing a target wake-up time TWT information element.
  • FIG. 2 shows a schematic diagram of a beacon frame in the embodiment of the present application.
  • the first indication information indicates the sending time of the second beacon frame, which may be the sending time of the second beacon frame directly included in the corresponding subfield in the first indication information, or
  • FIG. 3 A schematic diagram of a beacon frame of another embodiment of the present application is shown.
  • the subfield corresponding to the first indication information may include a number of beacon frame intervals between the first beacon frame and the second beacon frame, and the station may select the number of intervals according to the beacon frame. , determining the transmission time of the second beacon frame.
  • the beacon frame including the TWT information element may be sent periodically.
  • the first beacon frame may further include second indication information, where the second indication information is used to indicate a transmission period of the beacon frame including the TWT information unit.
  • the station may determine the transmission time of the subsequent beacon frame including the TWT information unit, so that the user can wake up at the correct time. To receive a beacon frame including a TWT information unit, communication efficiency is improved.
  • the first beacon frame may also be a beacon frame including a TWT IE.
  • the first indication information may indicate a next beacon frame including the TWT IE adjacent to the first beacon frame, or the first indication information may also indicate the first A beacon frame itself.
  • the first beacon frame may include a service identifier, where the service identifier may be used to indicate a service type corresponding to the first indication information.
  • the service identifier may also be included in the first indication information.
  • the station may determine, according to the service identifier, a service type corresponding to the first indication information.
  • the service type corresponding to the first indication information may be the service type of the service to which the uplink data triggered by the trigger frame indicated by the target TWT information unit belongs, and the target TWT information unit is indicated by the first beacon frame.
  • the TWT information element included in the second beacon frame.
  • the first beacon frame may include multiple TWT Beacon Counts, and the indication information in each indication domain respectively corresponds to different service types, after the site receives the first beacon frame. And determining, according to the service type of the service to which the upload data is to be sent, the indication information in the corresponding indication domain as the first indication information, and receiving the beacon frame including the TWT information according to the indication information of the corresponding indication domain, and performing dormancy.
  • the station After receiving the first beacon frame, the station receives the second beacon frame according to the indication of the first indication information.
  • the station determines the sending time of the second beacon frame by reading the first indication information, so as to wake up before the sending time of the second beacon frame, and receive the first Two beacon frames.
  • the station can use the value of the beacon frame interval multiplied by the value of the beacon interval to know the transmission time of the second beacon frame.
  • the method for determining the length of the beacon frame interval is not limited in the embodiment of the present application. The station may learn the length of the beacon frame interval by interacting with the access point, or the beacon frame interval carried by the site may also be carried by the first beacon frame. The length is determined.
  • the station first receives the first beacon frame, where the first indication information included in the first beacon frame is used to indicate the sending time of the second beacon frame including the TWT information unit, and the station according to the first indication information
  • the indication determines the transmission time of the second beacon frame, so that the second beacon frame including the TWT information unit can be received at the correct time, thereby improving communication efficiency.
  • the method 100 further includes:
  • the station determines, according to an indication of the TWT information unit in the second beacon frame, a target time at which the access point sends a trigger frame.
  • the station receives the trigger frame at the target time.
  • the station After receiving the trigger frame, the station sends uplink data to the access point.
  • FIG. 4 is a schematic diagram of a communication method according to an embodiment of the present application.
  • the first indication information may be named as TWT Beacon Count information (TWT Beacon Count), and the TWT Beacon Count may be used to indicate The beacon frame interval between the current beacon frame and the next beacon frame (ie, the second beacon frame) including the TWT information element.
  • TWT Beacon Count TWT Beacon Count
  • the indicated TWT Beacon Count may be 0, indicating that the beacon frame includes a TWT information element, or the TWT Beacon Count included therein may also indicate
  • the transmission time of the next beacon frame including the TWT information unit is not limited in this embodiment of the present application.
  • a communication method for broadcasting a TWT in the embodiment of the present application is described above with reference to FIG. 1 and FIG. 4, and a communication method for a request-type TWT in the embodiment of the present application will be described below with reference to FIG.
  • the TWT requesting site establishes a TWT protocol with the TWT replying site through one interaction.
  • the TWT requesting site and the TWT responding site remain active in the TWT service phase (SP) of the TWT protocol for data transmission and reception.
  • SP TWT service phase
  • the start time of the TWT service phase is periodic, that is, the TWT request site and the TWT response site agree on the TWT service in the TWT protocol.
  • the period of the arrival time of the service phase so that it is not necessary to stipulate the start time of the TWT service phase before the start of each TWT service phase, but enter the TWT service phase according to the cycle agreed by the TWT protocol.
  • the stations need to enter the active state or the dormant state according to the periodicity regardless of whether the data needs to be sent or received between the sites, which is not conducive to energy saving of the site.
  • the TWT service phase is periodic. Regardless of whether data needs to be sent or received between sites, it is necessary to enter an active state in the TWT service phase according to the TWT cycle, resulting in resources. waste. Moreover, the time interval between the TWT service phases cannot be dynamically adjusted according to the service strength of the site.
  • a communication method for an implicit TWT is proposed.
  • the basic idea is that after a TWT protocol is agreed between sites, the time interval between TWT service phases can be based on the TWT service phase. Whether communication (or data exchange) occurs to determine when the next TWT service phase arrives. Whether the above communication occurs may refer to whether at least one successful data exchange has been performed between the first station and the second station.
  • the successful data exchange may be that the first station sends a data frame/management frame to the second station, and after receiving the second station, the second station sends an acknowledgement frame to the first station, and the first station successfully receives the acknowledgement frame sent by the second station.
  • the method 300 includes:
  • the first site and the second site enter a first target wake-up time TWT service phase, where the first site and the second site are in an active state during the first TWT service phase.
  • the first station waits for a first time interval and enters a second TWT service phase, where the length of the first time interval is based on the first site and the The second station determines whether communication occurs during the first TWT service phase.
  • the first time interval may be determined to be a smaller value, and the first station and the second station do not communicate during the second TWT service phase. At this time, it can be determined that the first time interval is a large value.
  • the length of the time interval before the arrival of the next TWT service phase is determined according to whether the first site and the second site communicate in the first TWT service phase, so that the first site and the second site may be Service intensity adjusts the time interval between TWT service phases and improves communication efficiency.
  • first site and the second site may be access points and sites, respectively, or may be stations. point.
  • the method of the embodiment of the present application may be based on a TWT established between a site and an access point. It can also be based on a TWT established between sites.
  • the time interval between the current TWT service phase and the next TWT service phase can be increased. Energy saving at the site. If communication still does not occur during the next TWT service phase, the time interval before the next TWT service phase can be further increased.
  • the manner of increasing the time interval may be a multiplication manner, or may be another manner, which is not limited by the embodiment of the present application. If, during a TWT service phase, communication occurs between the sites, it may be necessary to perform subsequent communication between the sites, and the time interval before the arrival of the next TWT service phase may be reduced.
  • the method may be a method of halving, or may be directly set to a preset minimum value, which is not limited by the embodiment of the present application. Therefore, the time interval between the TWT service phases can be adjusted according to the service strength of the site, thereby saving power and ensuring communication delay, and improving communication efficiency.
  • FIG. 5 is a schematic diagram showing a communication method of another embodiment of the present application.
  • the communication method in FIG. 5 can be applied to recessive TWT.
  • the method of Figure 5 can be based on the established TWT between the site and the access point.
  • the TWT protocol can be agreed between the station and the access point, and the time at which the first TWT service phase starts is agreed in the TWT protocol.
  • the second TWT service phase will be started after waiting for T time.
  • the time interval before the next TWP service phase will be greater than the previous interval, which is 2T.
  • the time intervals are 4T and 8T, respectively. Since the station and the access point have communicated during the fifth TWT service phase, the next time interval is reduced to T.
  • the first site may be a TWT requesting node
  • the second site may be a TWT responding node
  • the specific steps include:
  • the first station sends a request frame for establishing a TWT to the second station, where the request frame includes TWT request information.
  • the second station sends a response frame to the first station, where the response frame includes TWT response information.
  • the response frame includes TWT response information.
  • a TWT protocol is established between the first site and the second site, and the time of the first TWT service phase is agreed.
  • a TWT service phase if the first site and the second site communicate, the next TWT service phase will be started after the T time; if the first site and the second site do not communicate, the next TWT
  • the time interval before the arrival of the service phase will be a larger value than the interval between the previous TWT service phases (for example, it can be twice the interval between the previous TWT service phases).
  • the first station and the second station determine an arrival time of a next TWT service phase according to the method of 403, and remain active at an arrival time of the next TWT service phase.
  • the time interval between the TWT service phases may be set to a maximum value, and when the time interval between the TWT service phases reaches a maximum, even if the first site and the second site are not in the TWT service phase When communication occurs, the interval between the TWT service phases no longer increases, but the maximum is maintained.
  • the maximum value may be specified by the standard or may be broadcasted by the access point to all stations in the beacon frame. Additionally, the maximum value may also be determined by negotiation between the first site and the second site. For example, it may be carried in the TWT request frame in step 401 and/or in the TWT response frame in 402.
  • the time interval between the first TWT service phase and the second TWT service node may be set to a fixed value.
  • the time interval can be the minimum of the interval between TWT service phases.
  • the first site and the second site may perform frame interaction to increase the time of arrival of the next service phase.
  • the first station sends a request frame
  • the request frame carries indication information for increasing the time of arrival of the next service phase.
  • the second station sends a response frame, where the indication information is carried, and is used to indicate that the request for “increasing the arrival time of the next service phase” is accepted, or the request is rejected.
  • the first site and the second site may perform frame interaction to reduce the time of the next service phase.
  • the first station sends a request frame
  • the request frame carries indication information for reducing the time of arrival of the next service phase.
  • the second station sends a response frame, where the indication information is carried, and is used to indicate that the request to reduce the time when the next service phase arrives is accepted. Or reject the request.
  • a frame interaction between an access point and a station may be performed to determine a transmission time of a beacon frame including a TWT information element, that is, when the station has data to be transmitted, it may send a request to the access point for request.
  • the access point After the TWT request frame is established, the access point sends a response frame to the station after receiving the request frame, and the indication information carried in the response frame may indicate that the site listens to the target beacon frame including the TWT information unit.
  • the station receives the target beacon frame according to the indication of the indication information, and sends the uplink data according to the TWT information unit included in the target beacon frame.
  • the access point when the access point needs to send downlink data to the station, the access point first needs to determine that the station is in an active state to send downlink data. Generally, the access point receives the power saving polling sent by the receiving station. Frame (PS-Poll, Power Save Poll) to determine that the site is active. In other words, each time the station wakes up from the dormant state, it sends a PS-Poll frame to the access point, notifying the access point that the station is already active, and the access point can send downlink data to the station.
  • PS-Poll Power Save Poll
  • the embodiment of the present application proposes a communication method for broadcasting a TWT.
  • the basic idea of the method is that the station receives the target information frame due to the prior interaction between the access point and the station. Time, so the station can be considered to be able to read the TWT information unit after receiving the target beacon frame, thereby obtaining the start and duration of the TWT service phase indicated by the TWT information unit. Then, the access point can further assume that the site will remain active (or keep listening channels) during the TWT service phase.
  • the station since the access point has determined that the station will wake up during the TWT service phase, the station may not send a PS-Poll frame to the access point after the WWT wakes up during the TWT service phase.
  • the point can directly send downlink data frames to the station without receiving the PS-Poll frame, thereby improving communication efficiency.
  • a method 500 for a broadcast TWT in accordance with an embodiment of the present application is described below, the method being performed by a site and an access point, the method 500 comprising:
  • the station sends a request frame to the access point, the request frame is used to request to establish a target wake-up time TWT;
  • the access point After receiving the request frame, the access point sends a response frame to the station, where the response frame is used to indicate that the site listens to a target beacon frame, and the target beacon frame includes TWT information. a beacon frame of the unit, so that the station enters the TWT service phase according to the TWT information element;
  • the access point does not need to receive a power saving polling PS-Poll frame sent by the station, and directly sends downlink data to the station.
  • the access point may directly send to the station in the TWT service phase without receiving the PS-Poll frame sent by the station.
  • Downlink data improves communication efficiency.
  • the first indication information may be carried in the response frame sent by the access point, where the first indication information may be used to indicate whether the station needs to send the PS-Poll frame to the access point.
  • the access point directly sends downlink data to the station.
  • the second indication information is used to indicate whether the access point needs to send downlink data to the station after receiving the PS-Poll frame.
  • the communication method for a wireless local area network according to an embodiment of the present application is described in detail above with reference to FIG. 1 to FIG. 5.
  • a site and an access point for a wireless local area network according to an embodiment of the present application will be described with reference to FIG. 6 to FIG.
  • FIG. 6 is a schematic diagram of a station 600 for transmitting data according to an embodiment of the present application. It should be understood that the site 600 of FIG. 6 can implement the various steps performed by the site in the foregoing. For the sake of brevity, the duplicate description is omitted as appropriate.
  • the site 600 includes:
  • the first receiving module 610 is configured to receive a first beacon frame sent by the access point, where the first beacon frame includes first indication information, where the first indication information is used to indicate a sending time of the second beacon frame.
  • the second beacon frame is a beacon frame including a target wake-up time TWT information element;
  • the second receiving module 620 is configured to receive the second beacon frame according to the indication of the first indication information.
  • the station first receives the first beacon frame, where the first indication information included in the first beacon frame is used to indicate the sending time of the second beacon frame including the TWT information unit, and the station according to the first indication
  • the indication of the information determines the transmission time of the second beacon frame, so that the second beacon frame including the TWT information unit can be received at the correct time, improving communication efficiency.
  • FIG. 7 is a schematic diagram of an access point 700 for transmitting data according to an embodiment of the present application. It should be understood that the access point 700 of FIG. 7 can implement the various steps performed by the access point in the foregoing. For the sake of brevity, the repeated description is omitted as appropriate.
  • the access point 700 includes:
  • the first sending module 710 is configured to send a first beacon frame, where the first beacon frame includes first indication information, where the first indication information is used to indicate a sending time of the second beacon frame, where the First
  • the second beacon frame is a beacon frame including a target wake-up time TWT information element;
  • the second sending module 720 is configured to send the second beacon frame.
  • the access point first sends the first beacon frame, where the first indication information included in the first beacon frame is used to indicate the sending time of the second beacon frame including the TWT information unit, so as to facilitate the site. Determining the transmission time of the second beacon frame according to the indication of the first indication information, thereby enabling the station to receive the second beacon frame including the TWT information unit at the correct time, improving communication efficiency.
  • FIG. 8 is a schematic diagram of a station 800 for transmitting data according to an embodiment of the present application. It should be understood that the site 800 of FIG. 8 can implement the various steps performed by the site in the foregoing. For the sake of brevity, the duplicate description is omitted as appropriate.
  • the site 800 is the first site, including:
  • a first control module 810 configured to control the first site to enter a first target wake-up time TWT service phase, where the first site and the second site are in an active state during the first TWT service phase;
  • a second control module 820 configured to: after the first TWT service phase ends, control the first station to wait for a first time interval, and enter a second TWT service phase, where the length of the first time interval is based on Determining whether the first station and the second station are in communication during the first TWT service phase.
  • the length of the time interval before the arrival of the next TWT service phase is determined according to whether the first site and the second site communicate in the first TWT service phase, so that the first site and the second site may be Service intensity adjusts the time interval between TWT service phases and improves communication efficiency.
  • FIG. 9 is a schematic diagram of an access point 900 for transmitting data according to an embodiment of the present application. It should be understood that the access point 900 of FIG. 9 can implement the various steps performed by the access point in the foregoing. For the sake of brevity, the duplicate description is omitted as appropriate.
  • the station 900 includes:
  • the receiving module 910 is configured to receive a request frame from the station, where the request frame is used to request to establish a target wake-up time TWT;
  • a sending module 920 configured to send, to the station, a response frame, where the response frame is used to indicate that the site listens to a target beacon frame, where the target beacon frame is a beacon frame that includes a TWT information unit, so that The station enters the TWT service phase according to the TWT information unit;
  • the sending module 920 is further configured to: in the TWT service phase, send the downlink data directly to the station without receiving a power saving polling PS-Poll frame sent by the station.
  • the access point may directly send to the station in the TWT service phase without receiving the PS-Poll frame sent by the station.
  • Downlink data improves communication efficiency.
  • FIG. 10 is a schematic diagram of a station 1000 for transmitting data according to an embodiment of the present application. It should be understood that the site 1000 of FIG. 10 can implement the various steps performed by the site in the foregoing. For the sake of brevity, the duplicate description is omitted as appropriate.
  • the site 1000 includes:
  • the sending module 1010 is configured to send a request frame to the access point, where the request frame is used to request to establish a target wake-up time TWT;
  • the receiving module 1020 is configured to receive a response frame from the access point, where the response frame is used to indicate that the site 1000 listens to a target beacon frame, where the target beacon frame is a beacon frame that includes a TWT information element.
  • control module 1030 configured to control the site 1000 to enter a TWT service phase according to the TWT information unit
  • the receiving module 1020 is further configured to receive the downlink data from the access point without sending a power saving polling PS-Poll frame to the access point in the TWT service phase.
  • the station and the access point determine the target beacon frame TWT service phase by interaction
  • the station can directly access from the access point without receiving the PS-Poll frame to the access point in the TWT service phase.
  • the point receives and transmits downlink data, which improves communication efficiency.
  • FIG. 11 is a schematic diagram of a station 1100 for transmitting data according to an embodiment of the present application. It should be understood that the site 1100 of FIG. 11 can implement the various steps performed by the site in the foregoing. For the sake of brevity, the duplicate description is omitted as appropriate.
  • the site 1100 includes:
  • a memory 1110 configured to store a program
  • the processor 1130 is configured to execute a program in the memory 1110, when the program is executed, the processor 1130 is configured to control the transceiver 1120 to receive a first beacon frame sent by an access point, where the first beacon is The frame includes first indication information, where the first indication information is used to indicate a transmission time of the second beacon frame, where the second beacon frame is a beacon frame including a target wake-up time TWT information element; And indicating, by the first indication information, the second beacon frame.
  • the station first receives the first beacon frame, where the first indication information included in the first beacon frame is used to indicate the sending time of the second beacon frame including the TWT information unit, and the station according to the first indication An indication of information to determine the transmission time of the second beacon frame so that it can be at the correct time Receiving a second beacon frame including a TWT information unit improves communication efficiency.
  • FIG. 12 is a schematic diagram of an access point 1200 for transmitting data according to an embodiment of the present application. It should be understood that the access point 1200 of FIG. 12 can implement the various steps performed by the access point in the foregoing. For the sake of brevity, the duplicate description is omitted as appropriate.
  • the access point 1200 includes:
  • a memory 1210 configured to store a program
  • the processor 1230 is configured to execute a program in the memory 1210, when the program is executed, the processor 1230 is configured to control the transceiver 1220 to send a first beacon frame, where the first beacon frame includes a first indication Information, the first indication information is used to indicate a sending time of the second beacon frame, where the second beacon frame is a beacon frame including a target wake-up time TWT information element; and the second beacon frame is sent .
  • the access point first sends the first beacon frame, where the first indication information included in the first beacon frame is used to indicate the sending time of the second beacon frame including the TWT information unit, so as to facilitate the site. Determining the transmission time of the second beacon frame according to the indication of the first indication information, thereby enabling the station to receive the second beacon frame including the TWT information unit at the correct time, improving communication efficiency.
  • FIG. 13 is a schematic diagram of a station 1300 for transmitting data according to an embodiment of the present application. It should be understood that the site 1300 of FIG. 13 can implement the various steps performed by the site in the foregoing. For the sake of brevity, the duplicate description is omitted as appropriate.
  • the site 1300 is the first site, including:
  • a memory 1310 configured to store a program
  • a processor 1330 configured to execute a program in the memory 1310, when the program is executed, the processor 1330 is configured to control the first station to enter a first target wake-up time TWT service phase, the first site and The second site is in an active state during the first TWT service phase; and after the first TWT service phase ends, controlling the first site to wait for the first time interval to enter a second TWT service phase, where The length of the first time interval is determined based on whether the first station and the second station communicate during the first TWT service phase.
  • the length of the time interval before the arrival of the next TWT service phase is determined according to whether the first site and the second site communicate in the first TWT service phase, so that the first site and the second site may be Service intensity adjusts the time interval between TWT service phases and improves communication efficiency.
  • FIG. 14 is a schematic diagram of an access point 1400 for transmitting data according to an embodiment of the present application. It should be understood that the access point 1400 of FIG. 14 can implement the various steps performed by the access point in the foregoing. For the sake of brevity, the duplicate description is omitted as appropriate.
  • the station 1400 includes:
  • a memory 1410 configured to store a program
  • the processor 1430 is configured to execute a program in the memory 1410. When the program is executed, the processor 1430 is configured to control the transceiver 1420 to receive a request frame from a station, where the request frame is used to request to establish a target wake-up time TWT. Sending a response frame to the station, the response frame is used to indicate that the site listens to a target beacon frame, and the target beacon frame is a beacon frame including a TWT information unit, so that the station is according to the TWT The information unit enters a TWT service phase; and is configured to send a downlink data directly to the station without receiving a power saving polling PS-Poll frame sent by the station in the TWT service phase.
  • the access point may directly send to the station in the TWT service phase without receiving the PS-Poll frame sent by the station.
  • Downlink data improves communication efficiency.
  • FIG. 15 is a schematic diagram of a station 1500 for transmitting data according to an embodiment of the present application. It should be understood that the site 1500 of FIG. 15 can implement the various steps performed by the site in the foregoing. For the sake of brevity, the duplicate description is omitted as appropriate.
  • the site 1500 includes:
  • a memory 1510 configured to store a program
  • the transceiver 1520 is configured to send a request frame to the access point, where the request frame is used to request to establish a target wake-up time TWT, and receive a response frame from the access point, where the response frame is used to indicate that the site 1000 is listening a target beacon frame, the target beacon frame being a beacon frame including a TWT information element;
  • a processor 1530 configured to execute a program in the memory 1510, when the program is executed, the processor 1530 controls the site 1000 to enter a TWT service phase according to the TWT information unit;
  • the transceiver 1520 is further configured to receive the downlink data from the access point without sending a power saving polling PS-Poll frame to the access point during the TWT service phase.
  • the station and the access point determine the target beacon frame TWT service phase by interaction
  • the station can directly access from the access point without receiving the PS-Poll frame to the access point in the TWT service phase.
  • the point receives and transmits downlink data, which improves communication efficiency.
  • system and “network” are used interchangeably herein.
  • This article The term “and/or” is merely an association describing the associated object, indicating that there may be three relationships, for example, A and / or B, which may indicate that A exists separately, A and B exist simultaneously, and B exists separately. These three situations.
  • the character "/" in this article generally indicates that the contextual object is an "or" relationship.
  • B corresponding to A means that B is associated with A, and B can be determined according to A.
  • determining B from A does not mean that B is only determined based on A, and that B can also be determined based on A and/or other information.
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or may be Integrate into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, or an electrical, mechanical or other form of connection.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the embodiments of the present application.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or software. The form of the unit is implemented.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, can be stored in a computer readable storage medium.
  • the technical solution of the present application may be in essence or part of the contribution to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

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Abstract

一种用于无线局域网的通信方法，能够提高通信效率。包括：站点接收接入点发送的第一信标帧，第一信标帧包括第一指示信息，第一指示信息用于指示第二信标帧的发送时间，其中，第二信标帧为包含目标唤醒时间TWT信息单元的信标帧；站点根据第一指示信息的指示，接收第二信标帧。

Description

用于无线局域网的通信方法和装置
本申请要求于2016年02月26日提交中国专利局、申请号为201610109833.0、发明名称为“用于无线局域网的通信方法和装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信领域，尤其涉及通信领域中用于无线局域网的通信方法和装置。
背景技术
为了提高无线局域网中的节点的节能效率，802.11ah标准引入了目标唤醒时间(TWT，Target Wake Time)机制。在TWT机制下，站点和接入点可以约定好唤醒时间，在唤醒时间保持活跃状态，并进行通信(或者说，数据交换)，从而可以在唤醒时间以外的时间进行休眠，以达到节能的目的。根据约定唤醒时间的方法不同，TWT机制分为广播型TWT和索取型TWT。
在广播型TWT中，接入点通过信标帧(Beacon Frame)广播TWT信息单元(IE,Information element)，TWT信息单元包含触发帧的发送时间信息，以便站点根据TWT信息单元指示的发送时间进行通信，而在其他时间进行休眠，从而达到节能的目的。在广播型TWT中，并非所有的信标帧都包含TWT信息单元，因此，当处于休眠状态的站点醒来并有数据上传时，可能接收到的信标帧不包含TWT信息单元，因而无法获知触发帧的发送时间，此时站点只能一直监听信道，直到接收到包含TWT信息单元的信标帧，不利于站点的节能。
发明内容
本申请实施例提供了一种用于无线局域网的通信方法和装置，以提高通信效率。
第一方面，提供了一种用于无线局域网的通信方法，包括：站点接收接入点发送的第一信标帧，所述第一信标帧包括第一指示信息，所述第一指示信息用于指示第二信标帧的发送时间，其中，所述第二信标帧为包含目标唤 醒时间信息单元TWT信息单元的信标帧；所述站点根据所述第一指示信息的指示，接收所述第二信标帧。
站点首先接收第一信标帧，第一信标帧中包括的第一指示信息用于指示包括TWT信息单元的第二信标帧的发送时间，站点根据第一指示信息的指示，确定第二信标帧的发送时间，从而能够在正确的时间接收包括TWT信息单元的第二信标帧，提高了通信效率。
在一种可能的实现方式中，所述第一指示信息包括所述第一信标帧与所述第二信标帧之间的信标帧间隔的个数。
在一种可能的实现方式中，所述第一信标帧还包括第二指示信息，所述第二指示信息用于指示包含TWT信息单元的信标帧的发送周期。
在一种可能的实现方式中，所述方法还包括：所述站点根据所述第二信标帧中的所述TWT信息单元的指示，确定所述接入点发送触发帧的目标时间；所述站点在所述目标时间，接收所述触发帧。
第二方面，提供了一种用于无线局域网的通信方法，包括：接入点发送第一信标帧，所述第一信标帧包括第一指示信息，所述第一指示信息用于指示第二信标帧的发送时间，其中，所述第二信标帧为包含目标唤醒时间TWT信息单元的信标帧；所述接入点发送所述第二信标帧。
接入点首先发送第一信标帧，第一信标帧中包括的第一指示信息用于指示包括TWT信息单元的第二信标帧的发送时间，以便于站点根据第一指示信息的指示，确定第二信标帧的发送时间，从而能够使得站点能够在正确的时间接收包括TWT信息单元的第二信标帧，提高了通信效率。
在一种可能的实现方式中，所述第一指示信息包括所述第一信标帧与所述第二信标帧之间的信标帧间隔的个数。
在一种可能的实现方式中，所述第一信标帧还包括第二指示信息，所述第二指示信息用于指示包含TWT信息单元的信标帧的发送周期。
在一种可能的实现方式中，所述方法还包括：所述接入点在所述TWT信息单元指示的目标时间，发送触发帧。
第三方面，提供了一种用于无线局域网的通信方法，包括：第一站点进入第一目标唤醒时间TWT服务阶段，所述第一站点和第二站点在所述第一TWT服务阶段处于活跃状态；在所述第一TWT服务阶段结束后，所述第一站点等待第一时间间隔，进入第二TWT服务阶段，其中，所述第一时间间 隔的长度是基于所述第一站点与所述第二站点在所述第一TWT服务阶段是否发生通信确定的。
根据第一站点和第二站点在第一TWT服务阶段是否发生通信确定下一个TWT服务阶段到来前的时间间隔长度，从而可以根据第一站点和第二站点之间的业务强度来调整TWT服务阶段之间的时间间隔，提高了通信效率。
在一种可能的实现方式中，在所述第一站点和所述第二站点在所述第一TWT服务阶段发生通信的情况下，所述第一时间间隔小于等于第二时间间隔，所述第二时间间隔为所述第一TWT服务阶段与相邻的上一个TWT服务阶段之间的时间间隔长度。
在一种可能的实现方式中，在所述第一站点和所述第二站点在所述第一TWT服务阶段没有发生通信的情况下，所述第一时间间隔大于等于第二时间间隔，所述第二时间间隔为所述第一TWT服务阶段与相邻的上一个TWT服务阶段之间的时间间隔长度。
第四方面，提供了一种用于无线局域网的通信方法，包括：接入点从站点接收请求帧，所述请求帧用于请求建立目标唤醒时间TWT；所述接入点向所述站点发送响应帧，所述响应帧用于指示所述站点侦听目标信标帧，所述目标信标帧为包含TWT信息单元的信标帧，以便所述站点根据所述TWT信息单元进入TWT服务阶段；在所述TWT服务阶段，所述接入点无需接收所述站点发送的功率节省轮询PS-Poll帧，直接向所述站点发送下行数据。
站点和接入点在通过交互确定目标信标帧TWT服务阶段后，接入点在该TWT服务阶段无需接收站点发送的PS-Poll帧条件下，可以直接向站点发送下行数据，提高了通信效率。
在一种可能的实现方式中，所述响应帧包括第一指示信息，所述第一指示信息用于指示所述站点在所述TWT服务阶段是否需要向所述接入点发送PS-Poll帧。
第五方面，提供了一种用于无线局域网的通信方法，其特征在于，包括：站点向接入点发送请求帧，所述请求帧用于请求建立目标唤醒时间TWT；所述站点从所述接入点接收响应帧，所述响应帧用于指示所述站点侦听目标信标帧，所述目标信标帧为包含TWT信息单元的信标帧；所述站点根据所述TWT信息单元进入TWT服务阶段；在所述TWT服务阶段，所述站点无需向所述接入点发送功率节省轮询PS-Poll帧，直接从所述接入点接收下行 数据。
站点和接入点在通过交互确定目标信标帧TWT服务阶段后，站点在该TWT服务阶段无需接收向接入点发送PS-Poll帧条件下，可以直接从接入点接收发送下行数据，提高了通信效率。
在一种可能的实现方式中，所述响应帧包括第一指示信息，所述第一指示信息用于指示所述站点在所述TWT服务阶段无需向所述接入点发送PS-Poll帧。
第六方面，提供了一种站点，所述站点包括用于执行第一方面的方法的模块。
第七方面，提供了一种接入点，所述接入点包括用于执行第二方面的方法的模块。
第八方面，提供了一种站点，所述站点包括用于执行第三方面的方法的模块。
第九方面，提供了一种接入点，所述站点包括用于执行第四方面的方法的模块。
第十方面，提供了一种站点，所述站点包括用于执行第五方面的方法的模块。
第十一方面，提供了一种站点，所述站点包括存储器、处理器和收发器。所述存储器用于存储程序，所述处理器用于执行程序，所述收发器用于与其它站点通信。当所述程序被执行时，所述处理器用于执行第一方面的方法。
第十二方面，提供了一种接入点，所述接入点包括存储器、处理器和收发器。所述存储器用于存储程序，所述处理器用于执行程序，所述收发器用于与其它站点通信。当所述程序被执行时，所述处理器用于执行第二方面的方法。
第十三方面，提供了一种站点，所述站点包括存储器、处理器和收发器。所述存储器用于存储程序，所述处理器用于执行程序，所述收发器用于与其它站点通信。当所述程序被执行时，所述处理器用于执行第三方面的方法。
第十四方面，提供了一种接入点，所述接入点包括存储器、处理器和收发器。所述存储器用于存储程序，所述处理器用于执行程序，所述收发器用于与其它站点通信。当所述程序被执行时，所述处理器用于执行第四方面的方法。
第十五方面，提供了一种站点，所述站点包括存储器、处理器和收发器。所述存储器用于存储程序，所述处理器用于执行程序，所述收发器用于与其它站点通信。当所述程序被执行时，所述处理器用于执行第五方面的方法。
附图说明
图1是现有技术的广播TWT的示意图。
图2是本申请实施例的信标帧的示意图。
图3是本申请另一实施例的信标帧的示意图。
图4是本申请实施例的通信方法的示意图。
图5是本申请另一实施例的通信方法的示意图。
图6是本申请另一实施例的站点的示意图。
图7是本申请另一实施例的接入点的示意图。
图8是本申请另一实施例的站点的示意图。
图9是本申请另一实施例的接入点的示意图。
图10是本申请另一实施例的站点的示意图。
图11是本申请另一实施例的站点的示意图。
图12是本申请另一实施例的接入点的示意图。
图13是本申请另一实施例的站点的示意图。
图14是本申请另一实施例的接入点的示意图。
图15是本申请另一实施例的站点的示意图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行描述。
应理解，本申请实施例的技术方案可以应用于各种通信系统，例如：全球移动通讯(Global System of Mobile communication，简称为“GSM”)系统、码分多址(Code Division Multiple Access，简称为“CDMA”)系统、宽带码分多址(Wideband Code Division Multiple Access，简称为“WCDMA”)系统、通用分组无线业务(General Packet Radio Service，简称为“GPRS”)、长期演进(Long Term Evolution，简称为“LTE”)系统、LTE频分双工(Frequency Division Duplex，简称为“FDD”)系统、LTE时分双工(Time Division Duplex， 简称为“TDD”)、通用移动通信系统(Universal Mobile Telecommunication System，简称为“UMTS”)或全球互联微波接入(Worldwide Interoperability for Microwave Access，简称为“WiMAX”)通信系统等。
图1示出了现有技术的的广播TWT的示意图。如图1所示，在广播TWT中，接入点在信标帧中直接广播TWT信息单元，指示接入点将会发送触发帧(TF,Trigger Frame)，触发多用户进行上行传输。该触发帧可以包括资源分配信息，该资源分配信息用于触发多用户在相应的资源块上进行传输。或者，该触发帧可以是随机接入触发帧(TFR,Trigger Frame For Random Access),该TFR可以用于触发多用户采用正交频分多址(OFDMA,Orthogonal Frequency Division Multiple Access)的方式进行随机接入。在广播TWT中，接入点在信标帧中携带的TWT信息单元包含TF或TFR的发送时间等信息，便于站点在正确的时间醒来进行通信，而在其他时间进行休眠，从而达到节省功率的目的。
如前文所述，在现有技术中的广播TWT中，因为并非所有信标帧都包括TWT信息单元，所以当站点从休眠状态醒来，并需要向接入点上传数据时，需要一直监听信道，直至接收到包括TWT信息单元的信标帧，或者说，站点可以休眠至下一个信标帧，但是下一个信标帧可能同样不包括信标帧。站点需要一直重复休眠和醒来的步骤，直至接收到包括TWT信息单元的信标帧，从而不利于站点节能。
针对上述问题，本申请实施例中提出，可以在信标帧中包括第一指示信息，该第一指示信息可以用于指示包括TWT信息单元的信标帧的发送时间，例如，该第一指示信息可以包括当前信标帧距离下一个包括TWT信息单元的信标帧的信标帧间隔。所以，当站点在接收到信标帧之后，可以获知包括TWT信息单元的信标帧的到来时间，进而站点可以休眠至包括TWT信息单元的信标帧到来前，醒来接收该信标帧，从而并进一步节省了站点的能耗，提高了站点的通信效率。
下文描述了本申请实施例的用于无线局域网的通信方法100，该方法100可以由站点和接入点执行，如下所述，该方法100包括：
101，接入点向站点发送第一信标帧，所述第一信标帧包括第一指示信息，所述第一指示信息用于指示第二信标帧的发送时间，其中，所述第二信标帧为包含目标唤醒时间TWT信息单元的信标帧。
可选地，图2示出了本申请实施例的信标帧的示意图。如图2所示，该第一指示信息指示该第二信标帧的发送时间，可以是在第一指示信息中对应的子字段中直接包括第二信标帧的发送时间，或者，图3示出了本申请另一实施例的信标帧的示意图。如图3所示，也可以在该第一指示信息对应的子字段包括第一信标帧与第二信标帧之间的信标帧间隔个数，站点可以根据该信标帧间隔个数，确定第二信标帧的发送时间。
可选地，包括TWT信息单元的信标帧可以是周期性发送的。该第一信标帧还可以包括第二指示信息，该第二指示信息用于指示包含TWT信息单元的信标帧的发送周期。站点在在确定第二信标帧的发送时间、以及包括TWT信息单元的信标帧的发送周期之后，可以确定后续的包括TWT信息单元的信标帧的发送时间，从而可以在正确的时间醒来接收包括TWT信息单元的信标帧，提高了通信效率。
应理解，该第一信标帧也可以是包括TWT IE的信标帧。当该第一信标帧包括TWT IE时，该第一指示信息可以指示与该第一信标帧相邻的下一个包括TWT IE的信标帧，或者该第一指示信息也可以指示该第一信标帧本身。
可选地，该第一信标帧可以包括业务标识，该业务标识可以用于指示该第一指示信息对应的业务类型。该业务标识也可以包含于所述第一指示信息中。站点可以根据该业务标识，确定该第一指示信息对应的业务类型。需要说明的是，该第一指示信息对应的业务类型，可以指目标TWT信息单元所指示的触发帧触发的上行数据所属业务的业务类型，该目标TWT信息单元为该第一信标帧指示的第二信标帧所包含的TWT信息单元。
可选地，该第一信标帧可以包括多个TWT信标帧指示域(TWT Beacon Count)，各指示域中的指示信息分别对应不同的业务类型，站点在接收到第一信标帧后，根据待发送的上传数据所属业务的业务类型，将对应的指示域中的指示信息确定为第一指示信息，并根据对应的指示域的指示信息接收包括TWT信息的信标帧和进行休眠。
102，在接收到所述第一信标帧后，所述站点根据所述第一指示信息的指示，接收所述第二信标帧。
可选地，站点在接收到第一指示信息之后，通过读取该第一指示信息，确定第二信标帧的发送时间，从而在第二信标帧的发送时间之前醒来，接收该第二信标帧。例如，当所述第一指示信息包括第一信标帧与第二信标帧之 间的信标帧间隔个数时，站点可以使用信标帧间隔个数的值乘以信标帧间隔长度(Beacon Interval)的值，来获知第二信标帧的发送时间。本申请实施例对站点确定信标帧间隔长度的方法不作限定，站点可以通过和接入点交互获知该信标帧间隔长度，或者，站点也可以通过第一信标帧携带的信标帧间隔长度确定。
本申请实施例中，站点首先接收第一信标帧，第一信标帧中包括的第一指示信息用于指示包括TWT信息单元的第二信标帧的发送时间，站点根据第一指示信息的指示，确定第二信标帧的发送时间，从而能够在正确的时间接收包括TWT信息单元的第二信标帧，提高了通信效率。
可选地，该方法100还包括：
103，所述站点根据所述第二信标帧中的所述TWT信息单元的指示，确定所述接入点发送触发帧的目标时间。
104，所述站点在所述目标时间，接收所述触发帧。
105，在接收到所述触发帧之后，所述站点向所述接入点发送上行数据。
例如，图4示出了本申请实施例的通信方法的示意图，如图4所示，可以命名第一指示信息为TWT信标帧计数信息(TWT Beacon Count)，该TWT Beacon Count可以用于指示当前信标帧与下一个包括TWT信息单元的信标帧(即第二信标帧)之间的信标帧间隔。例如，当站点从休眠中醒来，收到第一个信标帧，获知其中的TWT Beacon Count＝3，于是该站点可以继续休眠3个信标帧间隔，然后醒来接收下一个包括TWT信息单元的信标帧，其中，对于包括TWT信息单元的信标帧，其指示的TWT Beacon Count可以为0，代表本信标帧包括TWT信息单元，或者，其包括的TWT Beacon Count也可以指示再下一个包括TWT信息单元的信标帧的发送时间，本申请实施例对此不作限定。
上文结合图1和图4描述了本申请实施例中的用于广播TWT的通信方法，下文将结合图5描述本申请实施例中的用于索取型TWT的通信方法。
在现有技术中的索取型TWT中，TWT请求站点与TWT应答站点通过一次交互建立TWT协议。TWT请求站点和TWT应答站点在TWT协议约定的TWT服务阶段(SP，Service Period)保持活跃状态，以进行数据的收发。其中，在索取型TWT中的隐式TWT中，TWT服务阶段的开始时间是周期性的，即TWT请求站点和TWT应答站点在TWT协议中约定TWT服 务阶段到来时间的周期，从而不需要在每个TWT服务阶段开始前约定TWT服务阶段的开始时间，而是根据TWT协议约定的周期，进入TWT服务阶段。在隐式TWT中，由于TWT服务阶段是周期性的，所以站点之间无论是否需要收发数据，都需要根据周期进入活跃状态或休眠状态，不利于站点的节能。
如上文所述，在索取型TWT的隐式TWT中，TWT服务阶段是周期性的，无论站点之间是否需要收发数据，都需要根据TWT的周期在TWT服务阶段进入活跃状态，造成了资源的浪费。而且TWT服务阶段之间的时间间隔不能根据站点的业务强度进行动态的调整。
在本申请实施例中提出了一种用于隐式TWT的通信方法，其基本思想是，当站点之间约定一个TWT协议之后，TWT服务阶段之间的时间间隔可以根据在TWT服务阶段之内是否发生通信(或者说，数据交换)来确定下一个TWT服务阶段到来的时间。上述是否发生通信可以指第一站点和第二站点之间是否进行了至少一次成功的数据交换。该成功的数据交换可以指，第一站点向第二站点发送数据帧/管理帧，第二站点接收成功后向第一站点发送确认帧，第一站点成功接收第二站点发送的确认帧。
为了便于理解，下文将描述本申请实施例的用于索取型TWT的通信方法300，该方法可以由站点或接入点执行。该方法300包括：
301，第一站点和第二站点进入第一目标唤醒时间TWT服务阶段，所述第一站点和所述第二站点在所述第一TWT服务阶段处于活跃状态；
302，在所述第一TWT服务阶段结束后，所述第一站点等待第一时间间隔，进入第二TWT服务阶段，其中，所述第一时间间隔的长度是基于所述第一站点与所述第二站点在所述第一TWT服务阶段是否发生通信确定的。
例如，第一站点和第二站点在第一TWT服务阶段发生通信时，可以确定该第一时间间隔为一个较小的值，当第一站点和第二站点在第二TWT服务阶段没有发生通信时，可以确定该第一时间间隔为一个较大的值。
在本申请实施例中，根据第一站点和第二站点在第一TWT服务阶段是否发生通信确定下一个TWT服务阶段到来前的时间间隔长度，从而可以根据第一站点和第二站点之间的业务强度来调整TWT服务阶段之间的时间间隔，提高了通信效率。
应理解，第一站点和第二站点可以分别是接入点和站点，也可以都是站 点。换句话说，本申请实施例的方法可以是基于站点与接入点之间建立的TWT。也可以是基于站点之间建立的TWT。
例如，在一个TWT服务阶段之内，站点之间没有发生通信，则说明当前站点之间的业务量较为稀疏，则可以增大当前TWT服务阶段与下一个TWT服务阶段之间的时间间隔，以便于站点节能。如果在下一个TWT服务阶段依然没有发生通信，则可以进一步增大下一个TWT服务阶段到来前的时间间隔。该增大时间间隔的方式可以是倍增的方式，也可以是别的方式，本申请实施例对此不作限定。而如果在一个TWT服务阶段内，站点之间发生了通信，说明该站点之间可能需要进行后续的通信，此时可以减小下一个TWT服务阶段到来前的时间间隔，该减小时间间隔的方法可以是减半的方式，也可以是直接将时间间隔设置为预设的最小值，本申请实施例对此不作限定。从而，可以根据站点的业务强度调整TWT服务阶段之间的时间间隔，以节省功率和保证通信时延，提高了通信效率。
图5示出了本申请另一实施例的通信方法的示意图。图5中的通信方法可以应用于隐性TWT。图5的方法可以基于站点和接入点之间的建立的TWT。如图3所示，站点和接入点之间可以约定TWT协议，在该TWT协议中约定第一个TWT服务阶段开始的时间。当在第一个TWT服务阶段中，站点和接入点之间发生了通信，那么将等待T时间后，开始第二个TWT服务阶段。当在第二个TWT服务阶段中，站点和接入点没有发生通信，那么下一个TWP服务阶段到来前的时间间隔将比上一个时间间隔更大，为2T。同样地，第三个和第四个TWT服务阶段中站点和接入点也没有发生通信，因此时间间隔分别为4T和8T。由于在第五个TWT服务阶段中，站点和接入点发生了通信，因此下一个时间间隔减小，为T。
为了便于理解，下文将描述本申请实施例的用于隐性TWT的通信方法的具体步骤，应理解，这些步骤或操作仅是实例，本申请实施例还可以执行其它操作或者以下操作的各种变形。此外，以下各个步骤可以按照与以下呈现的不同顺序来执行，并且有可能并非要执行以下的全部步骤。如下所示，该第一站点可以是TWT请求节点，该第二站点可以是TWT响应节点，该具体步骤包括：
401，第一站点向第二站点发送用于建立TWT的请求帧，所述请求帧中包含TWT请求信息。
402，第二站点向第一站点发送响应帧，所述响应帧中包含TWT响应信息。通过401和402之间的交互，第一站点和第二站点之间建立起TWT协议，约定了第一个TWT服务阶段的时间。
403，在一个TWT服务阶段中，如果第一站点和第二站点发生了通信，那么将在T时间后开始下一个TWT服务阶段；如果第一站点和第二站点没有发生通信，则下一个TWT服务阶段到来前的时间间隔将是一个约定好的比上一个TWT服务阶段之间的间隔更大的值(例如，可以是上一个TWT服务阶段间隔的两倍)。
404，所述第一站点和第二站点根据403的方法确定下一个TWT服务阶段的到来时间，并在所述下一个TWT服务阶段的到来时间保持活跃状态。
可选地，在403中，TWT服务阶段之间的时间间隔可以设置一个最大值，当TWT服务阶段之间的时间间隔达到最大值时，即使在TWT服务阶段中第一站点和第二站点没有发生通信，TWT服务阶段之间的间隔也不再增大，而是保持该最大值。该最大值可以是由标准规定的，也可以是由接入点在信标帧中广播发送给所有站点的。另外，该最大值还可以是由该第一站点和第二站点通过协商而确定的。例如，可以携带于步骤401中的TWT请求帧中和/或402中的TWT响应帧中。另外，在设置起始的第一个TWT服务阶段时，可以设置第一个TWT服务阶段与第二个TWT服务节点之间的时间间隔为一个固定值。例如，该时间间隔可以为TWT服务阶段之间间隔的最小值。
可选地，如果在一个TWT服务阶段之内第一站点与第二站点没有通信需求，第一站点与第二站点可以进行帧交互来增大下一个服务阶段到来的时间。例如，第一站点发送请求帧，所述请求帧携带指示信息，用于增大下一个服务阶段到来的时间。第二站点收到所述请求帧后发送响应帧，其中携带指示信息，用于表示接受所述“增大下一个服务阶段到来的时间”的请求，或拒绝所述请求。
类似地，如果在一个TWT服务阶段之内第一站点与第二站点发生了通信，所述第一站点与第二站点可以进行帧交互来减小下一个服务阶段到来的时间。例如，第一站点发送请求帧，所述请求帧携带指示信息，用于减小下一个服务阶段到来的时间。第二站点收到所述请求帧后发送响应帧，其中携带指示信息，用于表示接受所述“减小下一个服务阶段到来的时间”的请求， 或拒绝所述请求。
上文结合图1至图5描述的本申请实施例的用于广播TWT的通信方法以及用于索取型TWT的通信方法，下文将描述本申请另一实施例的用于广播TWT的通信方法。
在现有的广播TWT机制中，接入点和站点之间可以进行帧交互确定包括TWT信息单元的信标帧的发送时间，即站点有数据需要发送时，可以向接入点发送用于请求建立TWT的请求帧，接入点在接收到该请求帧之后，向站点发送响应帧，该响应帧中携带的指示信息可以指示站点侦听包括TWT信息单元的目标信标帧。站点根据该指示信息的指示接收目标信标帧，并根据目标信标帧中包含的TWT信息单元发送上行数据。而现有技术中，当接入点需要向站点发送下行数据时，接入点首先需要确定站点处于活跃状态才能发送下行数据，一般情况下，接入点通过接收接收站点发送的功率节省轮询帧(PS-Poll，Power Save Poll)，确定站点处于活跃状态。或者说，站点每次从休眠状态醒来时，都会向接入点发送PS-Poll帧，向接入点通知站点已经处于活跃状态，接入点可以向站点发送下行数据。
基于以上技术，为了提高通信效率，本申请实施例提出了一种用于广播TWT的通信方法，该方法的基本思想是，由于接入点和站点之间事先交互好了站点接收包括目标信息帧的时间，所以可以认为站点在接收到目标信标帧后能够读取到其中的TWT信息单元，从而获得该TWT信息单元指示的TWT服务阶段的开始和持续时间。那么，接入点可以进一步认为站点会在该TWT服务阶段内保持活跃状态(或者说，保持监听信道)。所以，在本申请实施例中，由于接入点已经确定站点将在该TWT服务阶段醒来，所以站点在该TWT服务阶段醒来后，可以不用向接入点发送PS-Poll帧，接入点在无需接收PS-Poll帧的前提下，可以直接向站点发送下行数据帧，从而提高了通信效率。
下文描述了本申请实施例的用于广播型TWT的方法500，该方法由站点和接入点执行，该方法500包括：
501，站点向接入点发送请求帧，所述请求帧用于请求建立目标唤醒时间TWT；
502，在接收到请求帧后，所述接入点向所述站点发送响应帧，所述响应帧用于指示所述站点侦听目标信标帧，所述目标信标帧为包含TWT信息 单元的信标帧，以便所述站点根据所述TWT信息单元进入TWT服务阶段；
503，在所述TWT服务阶段，所述接入点无需接收所述站点发送的功率节省轮询PS-Poll帧，直接向所述站点发送下行数据。
在本申请实施例中，站点和接入点在通过交互确定目标信标帧TWT服务阶段后，接入点在该TWT服务阶段无需接收站点发送的PS-Poll帧条件下，可以直接向站点发送下行数据，提高了通信效率。
可选地，在接入点发送的响应帧中，可以携带第一指示信息，该第一指示信息可以用于指示站点是否需要向接入点发送PS-Poll帧。当第一指示信息指示站点无需向接入点发送PS-Poll帧时，所述接入点直接向所述站点发送下行数据。或者，在站点发送的请求帧中可以携带第二指示信息，该第二指示信息用于指示接入点是否需要在接收PS-Poll帧后向站点发送下行数据。
上文结合图1至图5详细描述了本申请实施例的用于无线局域网的通信方法，下文将结合图6至图15描述本申请实施例的用于无线局域网的站点和接入点。
图6是本申请实施例的传输数据的站点600的示意图。应理解，图6的站点600能够实现前文中由站点执行的各个步骤，为了简洁，适当省略重复的描述，站点600包括：
第一接收模块610，用于接收接入点发送的第一信标帧，所述第一信标帧包括第一指示信息，所述第一指示信息用于指示第二信标帧的发送时间，其中，所述第二信标帧为包含目标唤醒时间TWT信息单元的信标帧；
第二接收模块620，用于根据所述第一指示信息的指示，接收所述第二信标帧。
在本申请实施例中，站点首先接收第一信标帧，第一信标帧中包括的第一指示信息用于指示包括TWT信息单元的第二信标帧的发送时间，站点根据第一指示信息的指示，确定第二信标帧的发送时间，从而能够在正确的时间接收包括TWT信息单元的第二信标帧，提高了通信效率。
图7是本申请实施例的传输数据的接入点700的示意图。应理解，图7的接入点700能够实现前文中由接入点执行的各个步骤，为了简洁，适当省略重复的描述，接入点700包括：
第一发送模块710，用于发送第一信标帧，所述第一信标帧包括第一指示信息，所述第一指示信息用于指示第二信标帧的发送时间，其中，所述第 二信标帧为包含目标唤醒时间TWT信息单元的信标帧；
第二发送模块720，用于发送所述第二信标帧。
在本申请实施例中，接入点首先发送第一信标帧，第一信标帧中包括的第一指示信息用于指示包括TWT信息单元的第二信标帧的发送时间，以便于站点根据第一指示信息的指示，确定第二信标帧的发送时间，从而能够使得站点能够在正确的时间接收包括TWT信息单元的第二信标帧，提高了通信效率。
图8是本申请实施例的传输数据的站点800的示意图。应理解，图8的站点800能够实现前文中由站点执行的各个步骤，为了简洁，适当省略重复的描述，站点800为第一站点，包括：
第一控制模块810，用于控制所述第一站点进入第一目标唤醒时间TWT服务阶段，所述第一站点和第二站点在所述第一TWT服务阶段处于活跃状态；
第二控制模块820，用于在所述第一TWT服务阶段结束后，控制所述第一站点等待第一时间间隔，进入第二TWT服务阶段，其中，所述第一时间间隔的长度是基于所述第一站点与所述第二站点在所述第一TWT服务阶段是否发生通信确定的。
在本申请实施例中，根据第一站点和第二站点在第一TWT服务阶段是否发生通信确定下一个TWT服务阶段到来前的时间间隔长度，从而可以根据第一站点和第二站点之间的业务强度来调整TWT服务阶段之间的时间间隔，提高了通信效率。
图9是本申请实施例的传输数据的接入点900的示意图。应理解，图9的接入点900能够实现前文中由接入点执行的各个步骤，为了简洁，适当省略重复的描述，站点900包括：
接收模块910，用于从站点接收请求帧，所述请求帧用于请求建立目标唤醒时间TWT；
发送模块920，用于向所述站点发送响应帧，所述响应帧用于指示所述站点侦听目标信标帧，所述目标信标帧为包含TWT信息单元的信标帧，以便所述站点根据所述TWT信息单元进入TWT服务阶段；
所述发送模块920，还用于在所述TWT服务阶段，无需接收所述站点发送的功率节省轮询PS-Poll帧，直接向所述站点发送下行数据。
在本申请实施例中，站点和接入点在通过交互确定目标信标帧TWT服务阶段后，接入点在该TWT服务阶段无需接收站点发送的PS-Poll帧条件下，可以直接向站点发送下行数据，提高了通信效率。
图10是本申请实施例的传输数据的站点1000的示意图。应理解，图10的站点1000能够实现前文中由站点执行的各个步骤，为了简洁，适当省略重复的描述，站点1000包括：
发送模块1010，用于向接入点发送请求帧，所述请求帧用于请求建立目标唤醒时间TWT；
接收模块1020，用于从所述接入点接收响应帧，所述响应帧用于指示所述站点1000侦听目标信标帧，所述目标信标帧为包含TWT信息单元的信标帧；
控制模块1030，用于控制所述站点1000根据所述TWT信息单元进入TWT服务阶段；
接收模块1020还用于在所述TWT服务阶段，无需向所述接入点发送功率节省轮询PS-Poll帧，直接从所述接入点接收下行数据。
在本申请实施例中，站点和接入点在通过交互确定目标信标帧TWT服务阶段后，站点在该TWT服务阶段无需接收向接入点发送PS-Poll帧条件下，可以直接从接入点接收发送下行数据，提高了通信效率。
图11是本申请实施例的传输数据的站点1100的示意图。应理解，图11的站点1100能够实现前文中由站点执行的各个步骤，为了简洁，适当省略重复的描述，站点1100包括：
存储器1110，用于存储程序；
收发器1120；
处理器1130，用于执行存储器1110中的程序，当所述程序被执行时，所述处理器1130用于控制收发器1120接收接入点发送的第一信标帧，所述第一信标帧包括第一指示信息，所述第一指示信息用于指示第二信标帧的发送时间，其中，所述第二信标帧为包含目标唤醒时间TWT信息单元的信标帧；根据所述第一指示信息的指示，接收所述第二信标帧。
在本申请实施例中，站点首先接收第一信标帧，第一信标帧中包括的第一指示信息用于指示包括TWT信息单元的第二信标帧的发送时间，站点根据第一指示信息的指示，确定第二信标帧的发送时间，从而能够在正确的时 间接收包括TWT信息单元的第二信标帧，提高了通信效率。
图12是本申请实施例的传输数据的接入点1200的示意图。应理解，图12的接入点1200能够实现前文中由接入点执行的各个步骤，为了简洁，适当省略重复的描述，接入点1200包括：
存储器1210，用于存储程序；
收发器1220；
处理器1230，用于执行存储器1210中的程序，当所述程序被执行时，所述处理器1230用于控制收发器1220发送第一信标帧，所述第一信标帧包括第一指示信息，所述第一指示信息用于指示第二信标帧的发送时间，其中，所述第二信标帧为包含目标唤醒时间TWT信息单元的信标帧；发送所述第二信标帧。
在本申请实施例中，接入点首先发送第一信标帧，第一信标帧中包括的第一指示信息用于指示包括TWT信息单元的第二信标帧的发送时间，以便于站点根据第一指示信息的指示，确定第二信标帧的发送时间，从而能够使得站点能够在正确的时间接收包括TWT信息单元的第二信标帧，提高了通信效率。
图13是本申请实施例的传输数据的站点1300的示意图。应理解，图13的站点1300能够实现前文中由站点执行的各个步骤，为了简洁，适当省略重复的描述，站点1300为第一站点，包括：
存储器1310，用于存储程序；
收发器1320；
处理器1330，用于执行存储器1310中的程序，当所述程序被执行时，所述处理器1330用于控制所述第一站点进入第一目标唤醒时间TWT服务阶段，所述第一站点和第二站点在所述第一TWT服务阶段处于活跃状态；用于在所述第一TWT服务阶段结束后，控制所述第一站点等待第一时间间隔，进入第二TWT服务阶段，其中，所述第一时间间隔的长度是基于所述第一站点与所述第二站点在所述第一TWT服务阶段是否发生通信确定的。
在本申请实施例中，根据第一站点和第二站点在第一TWT服务阶段是否发生通信确定下一个TWT服务阶段到来前的时间间隔长度，从而可以根据第一站点和第二站点之间的业务强度来调整TWT服务阶段之间的时间间隔，提高了通信效率。
图14是本申请实施例的传输数据的接入点1400的示意图。应理解，图14的接入点1400能够实现前文中由接入点执行的各个步骤，为了简洁，适当省略重复的描述，站点1400包括：
存储器1410，用于存储程序；
收发器1420；
处理器1430，用于执行存储器1410中的程序，当所述程序被执行时，所述处理器1430用于控制收发器1420从站点接收请求帧，所述请求帧用于请求建立目标唤醒时间TWT；向所述站点发送响应帧，所述响应帧用于指示所述站点侦听目标信标帧，所述目标信标帧为包含TWT信息单元的信标帧，以便所述站点根据所述TWT信息单元进入TWT服务阶段；用于在所述TWT服务阶段，无需接收所述站点发送的功率节省轮询PS-Poll帧，直接向所述站点发送下行数据。
在本申请实施例中，站点和接入点在通过交互确定目标信标帧TWT服务阶段后，接入点在该TWT服务阶段无需接收站点发送的PS-Poll帧条件下，可以直接向站点发送下行数据，提高了通信效率。
图15是本申请实施例的传输数据的站点1500的示意图。应理解，图15的站点1500能够实现前文中由站点执行的各个步骤，为了简洁，适当省略重复的描述，站点1500包括：
存储器1510，用于存储程序；
收发器1520，用于向接入点发送请求帧，所述请求帧用于请求建立目标唤醒时间TWT；从所述接入点接收响应帧，所述响应帧用于指示所述站点1000侦听目标信标帧，所述目标信标帧为包含TWT信息单元的信标帧；
处理器1530，用于执行存储器1510中的程序，当所述程序被执行时，所述处理器1530控制所述站点1000根据所述TWT信息单元进入TWT服务阶段；
收发器1520还用于在所述TWT服务阶段，无需向所述接入点发送功率节省轮询PS-Poll帧，直接从所述接入点接收下行数据。
在本申请实施例中，站点和接入点在通过交互确定目标信标帧TWT服务阶段后，站点在该TWT服务阶段无需接收向接入点发送PS-Poll帧条件下，可以直接从接入点接收发送下行数据，提高了通信效率。
另外，本文中术语“系统”和“网络”在本文中常被可互换使用。本文 中术语“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。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
应理解，在本申请实施例中，“与A相应的B”表示B与A相关联，根据A可以确定B。但还应理解，根据A确定B并不意味着仅仅根据A确定B，还可以根据A和/或其它信息确定B。
本领域普通技术人员可以意识到，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，能够以电子硬件、计算机软件或者二者的结合来实现，为了清楚地说明硬件和软件的可互换性，在上述说明中已经按照功能一般性地描述了各示例的组成及步骤。这些功能究竟以硬件还是软件方式来执行，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。
所属领域的技术人员可以清楚地了解到，为了描述的方便和简洁，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。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，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，该单元的划分，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。另外，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，也可以是电的，机械的或其它的形式连接。
该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，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。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申请实施例方案的目的。
另外，在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，也可以是两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能 单元的形式实现。
该集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分，或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例该方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。
以上某一实施例中的技术特征和描述，为了使申请文件简洁清楚，可以理解适用于其他实施例，在其他实施例不再一一赘述。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到各种等效的修改或替换，这些修改或替换都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以权利要求的保护范围为准。

Claims (16)

  1. 一种用于无线局域网的通信方法，其特征在于，包括：
    站点接收接入点发送的第一信标帧，所述第一信标帧包括第一指示信息，所述第一指示信息用于指示第二信标帧的发送时间，其中，所述第二信标帧为包含目标唤醒时间TWT信息单元的信标帧；
    所述站点根据所述第一指示信息的指示，接收所述第二信标帧。
  2. 如权利要求1所述的通信方法，其特征在于，所述第一指示信息包括所述第一信标帧与所述第二信标帧之间的信标帧间隔的个数。
  3. 如权利要求1或2所述的通信方法，其特征在于，所述第一信标帧还包括第二指示信息，所述第二指示信息用于指示包含TWT信息单元的信标帧的发送周期。
  4. 如权利要求1至3中任一项所述的通信方法，其特征在于，所述方法还包括：
    所述站点根据所述第二信标帧中的所述TWT信息单元的指示，确定所述接入点发送触发帧的目标时间；
    所述站点在所述目标时间，接收所述触发帧。
  5. 一种用于无线局域网的通信方法，其特征在于，包括：
    接入点发送第一信标帧，所述第一信标帧包括第一指示信息，所述第一指示信息用于指示第二信标帧的发送时间，其中，所述第二信标帧为包含目标唤醒时间TWT信息单元的信标帧；
    所述接入点发送所述第二信标帧。
  6. 如权利要求5所述的通信方法，其特征在于，所述第一指示信息包括所述第一信标帧与所述第二信标帧之间的信标帧间隔的个数。
  7. 如权利要求5或6所述的通信方法，其特征在于，所述第一信标帧还包括第二指示信息，所述第二指示信息用于指示包含TWT信息单元的信标帧的发送周期。
  8. 如权利要求5至7中任一项所述的通信方法，其特征在于，所述方法还包括：
    所述接入点在所述TWT信息单元指示的目标时间，发送触发帧。
  9. 一种站点，其特征在于，包括：
    第一接收模块，用于接收接入点发送的第一信标帧，所述第一信标帧包 括第一指示信息，所述第一指示信息用于指示第二信标帧的发送时间，其中，所述第二信标帧为包含目标唤醒时间TWT信息单元的信标帧；
    第二接收模块，用于根据所述第一指示信息的指示，接收所述第二信标帧。
  10. 如权利要求9所述的站点，其特征在于，所述第一指示信息包括所述第一信标帧与所述第二信标帧之间的信标帧间隔的个数。
  11. 如权利要求9或10所述的站点，其特征在于，所述第一信标帧还包括第二指示信息，所述第二指示信息用于指示包含TWT信息单元的信标帧的发送周期。
  12. 如权利要求9至11中任一项所述的站点，其特征在于，所述站点还包括：
    确定模块，用于根据所述第二信标帧中的所述TWT信息单元的指示，确定所述接入点发送触发帧的目标时间；
    接收模块，用于在所述目标时间，接收所述触发帧。
  13. 一种接入点，其特征在于，包括：
    第一发送模块，用于发送第一信标帧，所述第一信标帧包括第一指示信息，所述第一指示信息用于指示第二信标帧的发送时间，其中，所述第二信标帧为包含目标唤醒时间TWT信息单元的信标帧；
    第二发送模块，用于发送所述第二信标帧。
  14. 如权利要求13所述的接入点，其特征在于，所述第一指示信息包括所述第一信标帧与所述第二信标帧之间的信标帧间隔的个数。
  15. 如权利要求13或14所述的接入点，其特征在于，所述第一信标帧还包括第二指示信息，所述第二指示信息用于指示包含TWT信息单元的信标帧的发送周期。
  16. 如权利要求13至15中任一项所述的接入点，其特征在于，还包括：
    第三发送模块，用于在所述TWT信息单元指示的目标时间，发送触发帧。
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