WO2013123902A1 - 数据传输方法、接入点和站点 - Google Patents

数据传输方法、接入点和站点 Download PDF

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Publication number
WO2013123902A1
WO2013123902A1 PCT/CN2013/071813 CN2013071813W WO2013123902A1 WO 2013123902 A1 WO2013123902 A1 WO 2013123902A1 CN 2013071813 W CN2013071813 W CN 2013071813W WO 2013123902 A1 WO2013123902 A1 WO 2013123902A1
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Prior art keywords
frame
indication
indication information
control
duration
Prior art date
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PCT/CN2013/071813
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English (en)
French (fr)
Inventor
杨绿溪
孙远
杨讯
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.)
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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 EP13751559.9A priority Critical patent/EP2809110B1/en
Priority to JP2014557989A priority patent/JP2015508263A/ja
Publication of WO2013123902A1 publication Critical patent/WO2013123902A1/zh
Priority to US14/465,593 priority patent/US9860916B2/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access
    • H04W74/04Scheduled access
    • H04W74/06Scheduled access using polling
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02Power saving arrangements
    • H04W52/0209Power saving arrangements in terminal devices
    • H04W52/0212Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
    • H04W52/0216Power 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
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02Power saving arrangements
    • H04W52/0209Power saving arrangements in terminal devices
    • H04W52/0225Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0235Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a power saving command
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00Reducing energy consumption in communication networks
    • Y02D30/70Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • Embodiments of the present invention relate to the field of wireless communications, and more particularly, to data transmission methods, access points, and occupancy. Background technique
  • STAs stations
  • PS Power Saving
  • A-BE Access Category-Best Effort
  • TXOP Transmission Opportunity
  • the embodiment of the invention provides a data transmission method, which allows the STA to receive downlink data and send uplink data in one frame, which saves the resources consumed by the STA competition channel and improves the energy utilization rate of the STA.
  • a data transmission method includes:
  • the indication frame includes first indication information and second indication information, where the first indication information is used to indicate that the type of the indication frame is an energy-saving polling PS-POLL frame,
  • the second indication information is used to indicate a duration of the indication frame;
  • an indication frame that is sent by the STA is provided, where the indication frame includes first indication information and second indication information, where the first indication information is used to indicate the type of the indication frame.
  • the second indication information is used to indicate the duration of the indication frame; and the data frame sent by the STA is received within the duration indicated by the second indication information.
  • a site is provided, the site comprising:
  • a sending unit configured to send an indication frame to the AP, where the indication frame includes first indication information and second indication information, where the first indication information is used to indicate that the type of the indication frame is a PS-POLL frame, The second indication information is used to indicate a duration of the indication frame;
  • a receiving unit configured to send, by the STA, a data frame to the AP within a duration indicated by the second indication information.
  • an access point in another aspect, and the access point includes:
  • a receiving unit configured to receive an indication frame sent by the STA, where the indication frame includes first indication information and second indication information, where the first indication information is used to indicate that the type of the indication frame is an energy saving polling PS a -POLL frame, the second indication information is used to indicate a duration of the indication frame;
  • the receiving unit is further configured to receive a data frame sent by the STA within a duration indicated by the second indication information.
  • the STA sends the PS-POLL to the AP by using the indication frame, and the reserved channel does not need to re-compete the channel, allowing the STA to receive the downlink data and send the uplink data in one TX0P, which saves the consumption of the STA competition channel. Resources that improve the energy efficiency of STAs. DRAWINGS
  • FIG. 1 is a schematic flow chart of a data transmission method according to an embodiment of the present invention.
  • FIG. 2 is a schematic flow chart of a data transmission method according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of a station according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of an access point according to an embodiment of the present invention. detailed description
  • FIG. 1 is a schematic flow diagram of a data transmission method 100 that may be applied to data transmission between a wireless local area network, such as an access point AP and a subscriber station STA, in accordance with an embodiment of the present invention.
  • method 100 includes:
  • the STA sends an indication frame to the AP, where the indication frame includes first indication information and second indication information, where the first indication information is used to indicate that the type of the indication frame is an energy-saving polling PS-POLL frame.
  • the second indication information is used to indicate a duration of the indication frame;
  • the STA sends a data frame to the AP for the duration indicated by the second indication information.
  • the implementation process of the method of the embodiment of the present invention is further described in detail below with reference to specific examples.
  • the STA if the AP caches data of a certain STA, the STA is notified by a beacon frame. After receiving the beacon frame, the STA may request data from the AP according to the solution of the embodiment of the present invention.
  • the indication frame sent by the STA to the AP may be an enhanced PS-POLL frame of a Media Access Control (MAC) layer, where the enhanced PS-POLL frame Includes the Duration field.
  • the first indication information may be carried in a frame control (Frame Control) field of the enhanced PS-POLL frame
  • the second indication information may be carried in a Duration field.
  • the second indication information of the Duration field indicates a TXOP time limit of, for example, 3.008 ms and 1.504 ms.
  • the other STAs After receiving the enhanced PS-POLL frame, the other STAs respectively set respective Network Allocation Vectors (NAVs) according to the Duration field, so as to allow the STAs that send the PS-POLL to be from the AP within the TXOP time limit.
  • NAVs Network Allocation Vectors
  • the data is sent to the STA after the Short Inter-Frame Space (SIFS) time, if the AP cannot be the cached data at this time.
  • SIFS Short Inter-Frame Space
  • an Acknowledgement (ACK) frame is sent to the STA after the SIFS time.
  • the uplink data may be sent to the AP within the TXOP time limit indicated by the second indication information, that is, the step 120 is implemented without re-competing the channel.
  • the indication frame sent by the STA to the AP may also be a control frame of the MAC layer, where the control frame may be a Control Wrapper frame, and the bearer frame control of the control packet frame (
  • the Carried Frame Control field carries the first information, which is used to indicate that the packetized frame is used as a PS-POLL frame, and the second information is carried in a Duration/ID field of the control packet frame.
  • the TXOP time limit indicated by the second indication information of the Duration/ID field is, for example, 3.008 ms, 1.504 ms.
  • the control is in the packed frame.
  • Other domains can be set according to technical requirements or the requirements of the STA itself.
  • the other STAs after receiving the control packet, the other STAs respectively set respective network allocation vectors (NAVs) according to the second indication information of the Duration/ID field, so as to allow the control packet to be transmitted.
  • the STA receives downlink data from the AP and sends uplink data to the AP within the TXOP time limit.
  • the indication frame sent by the STA to the AP may also be a pure physical layer data frame without a MAC frame header, such as a null data packet (Null Data Packet, NDP for short).
  • NDP includes a Short Training Field (STF), a Long Training Field 1 (LTF1), and a Signal Field (SIG).
  • STF Short Training Field
  • LTF1 Long Training Field 1
  • SIG Signal Field
  • the first information and the second information may be carried in a SIG domain, where the first information indicates that the NDP is used as a PS-POLL frame, and the second information indicates a channel reserved by the PS-POLL. length of time.
  • the second indication information of the SIG field indicates a TXOP time limit of, for example, 3.008 ms and 1.504 ms.
  • the SIG domain can also carry the address of the AP and the address of the STA that sends the NDP.
  • the indication frame may include a quality of service (QoS) control domain
  • QoS quality of service
  • the QoS level of the indication frame carried by the QoS control domain is an access category-video (Access Category Video, Referred to as AC_VI) or Access Category-Voice (AC-VO), where the TXOP time limit is 3.008ms at the AC-VI level and the TXOP time limit is 1.504ms at the AC-VO level.
  • the data transmission method 200 of the embodiment of the present invention includes:
  • the indication frame includes first indication information and second indication information, where the first indication information is used to indicate that the type of the indication frame is an energy-saving polling PS-POLL frame.
  • the second indication information is used to indicate a duration of the indication frame;
  • the indication frame is an enhanced PS-POLL frame of the MAC layer, where the enhanced PS-POLL frame carries the first indication information in a frame control domain, and the enhanced PS-POLL frame includes a persistent a period domain, and carrying the second indication information in the duration period domain.
  • the indication frame is a control frame of the MAC layer, where the control frame is a control packet frame, and the bearer frame of the control packet frame controls the Carried Frame Control field to carry the first indication.
  • the information, the second indication information is carried in the duration/identification Duration/ID field.
  • the indication frame is an NDP
  • the NDP carries the first indication information and the second indication information in a signal domain.
  • the indication frame may include a QoS control domain, and the QoS level of the indication frame carried by the QoS control domain is an AC-VI level or an AC-VO level, wherein at the AC-VI level, the TXOP time limit is 3.008ms, and under the AC-VO level, the TXOP time limit is 1.504ms.
  • the STA sends the PS-POLL to the AP by using the indication frame, and the reserved channel does not need to re-compete the channel, allowing the STA to receive the downlink data and send the uplink data in one TXOP, thereby saving the consumption of the STA competition channel. Resources that improve the energy efficiency of STAs.
  • the embodiments of the present invention further provide an AP and a STA for implementing the data transmission method according to the embodiment of the present invention, which are separately described below.
  • a site 300 in accordance with an embodiment of the present invention includes:
  • the sending unit 310 is configured to send an indication frame to the AP, where the indication frame includes first indication information and second indication information, where the first indication information is used to indicate that the type of the indication frame is energy saving polling PS-POLL a frame, where the second indication information is used to indicate a duration of the indication frame;
  • the receiving unit 320 is configured to send, by the STA, a data frame to the AP within a duration indicated by the second indication information.
  • the indication frame sent by the sending unit 310 is an enhanced PS-POLL frame of the MAC layer, where the enhanced PS-POLL frame carries the first indication information in a frame control domain, the enhancement The PS-POLL frame includes a duration field, and the second indication information is carried in the duration period domain.
  • the indication frame sent by the sending unit 310 is a control frame of the MAC layer, where the control frame is a control packet frame, and the Carried Frame Control field of the control packet frame carries the first indication information, The second indication information is carried in the Duration/ID field.
  • the indication frame sent by the sending unit 310 is an NDP, where the NDP carries the first indication information and the second indication information in a signal domain.
  • the indication frame sent by the sending unit 310 may include a QoS control domain, and the QoS level of the indication frame carried by the QoS control domain is an AC-VI level or an AC-VO level, where in the AC- At the VI level, the TXOP time limit is 3.008ms, while at the AC-VO level, the TXOP is The limit is 1.504ms.
  • access point 400 includes:
  • the receiving unit 410 is configured to receive the indication frame sent by the STA, where the indication frame includes first indication information and second indication information, where the first indication information is used to indicate that the type of the indication frame is PS-POLL a frame, the second indication information is used to indicate a duration of the indication frame;
  • the receiving unit 410 is further configured to receive a data frame sent by the STA within a duration indicated by the second indication information.
  • the indication frame received by the receiving unit 410 is an enhanced PS-POLL frame of the MAC layer, where the enhanced PS-POLL frame carries the first indication information in a frame control domain, the enhancement The PS-POLL frame includes a duration field, and the second indication information is carried in the duration period domain.
  • the indication frame received by the receiving unit 410 is a control frame of the MAC layer, where the control frame is a control packet frame, and the Carried Frame Control field of the control packet frame carries the first indication information, The second indication information is carried in the Duration/ID field.
  • the indication frame received by the receiving unit 410 is an NDP, where the NDP carries the first indication information and the second indication information in a signal domain.
  • the indication frame received by the receiving unit 410 may include a QoS control domain, and the QoS level of the indication frame carried by the QoS control domain is an AC-VI level or an AC-VO level, where in the AC- At the VI level, the TXOP time limit is 3.008 ms, while in the AC-VO level, the TXOP time limit is 1.504 ms.
  • the disclosed systems, devices, and methods may be implemented in other ways.
  • the device embodiments described above are merely illustrative
  • the division of the unit is only a logical function division, and the actual implementation may have another division manner, for example, multiple units or components may be combined or may be integrated into another system, or some features may be ignored. Or not.
  • 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, and may be in an electrical, mechanical or other form.
  • the components displayed by the unit 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 purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention 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 functions, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium.
  • the technical solution of the present invention which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including
  • the instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • 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, which can store program codes. .

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Abstract

本发明实施例提供了一种数据传输方法、接入点和站点,所述方法包括:向接入点AP发送指示帧,其中所述指示帧包括第一指示信息和第二指示信息,所述第一指示信息用于指示所述指示帧的类型为PS-POLL帧,所述第二指示信息用于指示所述指示帧的持续时间;在所述第二指示信息所指示的持续时间内,向所述AP发送数据帧。根据本发明实施例,STA通过指示帧向AP发送PS-POLL并且预约信道持续时间,使得STA在接收到AP发送的下行数据帧之后向AP发送上行数据帧时,不需要重新竟争信道,允许STA在一个TXOP内实现接收下行数据和发送上行数据,节省了STA竟争信道所消耗的资源,提升了STA的能源利用率。

Description

数据传输方法、 接入点和站点 技术领域
本发明实施例涉及无线通信领域, 并且更具体地, 涉及数据传输方法、 接 人点和占点。 背景技术
在无线局域网(Wireless Local Area Netwok, 简称 WLAN )系统中, 可能存 在对节能要求较高的站点 (Station, 简称 STA ), 例如传感器站点。 在标准中定 义了 STA的节省功率(Power Saving, 简称 PS )模式, 选择 PS模式的 STA可 以休眠一个或多个信标( beacon ) 间隔。 当接入点 ( Access Point, 简称 AP ) 緩存有该 STA的数据时,将通过信标通知 STA。 STA可以通过节能轮询(Power Saving Polling, 简称 PS-POLL ) 帧向 AP请求获取緩存的数据。 PS-POLL帧的 等级为接入类别-最大能力 (Access Category-Best Effort, 简称 AC-BE ), 对应的 传输时机( Transmission Opportunity, 简称 TXOP )为零, 即仅允许传送一个数 据帧。 如果 STA接收到 ΑΡ发送的下行数据之后, 希望向 ΑΡ发送上行数据, 则 需要重新进行信道竟争,建立新的 ΤΧΟΡ。这样一来,对于节能要求较高的 STA, 造成了资源浪费。 发明内容
本发明实施例提供一种数据传输的方法, 允许 STA在一个 ΤΧΟΡ内实现接 收下行数据和发送上行数据, 节省了 STA竟争信道所消耗的资源, 提升了 STA 的能源利用率。
一方面, 提供了一种数据传输方法, 所述方法包括:
向接入点 ΑΡ发送指示帧,其中所述指示帧包括第一指示信息和第二指示信 息, 所述第一指示信息用于指示所述指示帧的类型为节能轮询 PS-POLL帧, 所 述第二指示信息用于指示所述指示帧的持续时间;
在所述第二指示信息所指示的持续时间内, 向所述 ΑΡ发送数据帧。
另一方面, 提供了一种接收所述 STA发送的指示帧, 其中所述指示帧包括 第一指示信息和第二指示信息, 所述第一指示信息用于指示所述指示帧的类型 为 PS-POLL帧, 所述第二指示信息用于指示所述指示帧的持续时间; 在所述第二指示信息所指示的持续时间内, 接收所述 STA发送的数据帧。 另一方面, 提供了一种站点, 所述站点包括:
发送单元, 用于向 AP发送指示帧, 其中所述指示帧包括第一指示信息和第 二指示信息, 所述第一指示信息用于指示所述指示帧的类型为 PS-POLL帧, 所 述第二指示信息用于指示所述指示帧的持续时间;
接收单元, 用于在所述第二指示信息所指示的持续时间内, STA向所述 AP 发送数据帧。
另一方面, 提供了一种接入点, 所述接入点包括:
接收单元, 用于接收所述 STA发送的指示帧, 其中所述指示帧包括第一指 示信息和第二指示信息, 所述第一指示信息用于指示所述指示帧的类型为节能 轮询 PS-POLL帧, 所述第二指示信息用于指示所述指示帧的持续时间;
所述接收单元还用于在所述第二指示信息所指示的持续时间内, 接收所述 STA发送的数据帧。
根据本发明实施例, STA通过指示帧向 AP发送 PS-POLL并且预约信道持 不需要重新竟争信道, 允许 STA在一个 TX0P内实现接收下行数据和发送上行 数据, 节省了 STA竟争信道所消耗的资源, 提升了 STA的能源利用率。 附图说明
图 1是根据本发明实施例的数据传输方法的示意流程图;
图 2是根据本发明实施例的数据传输方法的示意流程图;
图 3是根据本发明实施例的站点的示意结构图;
图 4是根据本发明实施例的接入点的示意结构图。 具体实施方式
下面将结合本发明实施例中的附图, 对本发明实施例中的技术方案进行清 楚、 完整地描述, 显然, 所描述的实施例是本发明一部分实施例, 而不是全部 的实施例。
图 1是根据本发明实施例的数据传输方法 100的示意流程图, 该方法可以 应用与无线局域网中,例如接入点 AP与用户站点 STA之间的数据传输。如图 1 所示, 方法 100包括:
110: STA向 AP发送指示帧, 其中所述指示帧包括第一指示信息和第二指 示信息,所述第一指示信息用于指示所述指示帧的类型为节能轮询 PS-POLL帧, 所述第二指示信息用于指示所述指示帧的持续时间;
120: 在所述第二指示信息所指示的持续时间内, STA向所述 AP发送数据 帧。
下面结合具体的例子来进一步详细说明本发明实施例的方法的实现过程。 在 WLAN中, 如果 AP緩存了某一 STA的数据, 则通过信标( Beacon )帧 通知该 STA。 该 STA接收到信标帧以后, 可以根据本发明实施例的方案, 向 AP 请求数据。
根据本发明实施例,在步骤 110中, STA向 AP发送的指示帧可以是媒体接 入控制(Media Access Control, 简称 MAC )层的增强的 PS-POLL帧, 其中所述 增强的 PS-POLL 帧包括持续期间 (Duration )域。 在这种情况下, 可以将所述 第一指示信息承载在该增强的 PS-POLL帧的帧控制 ( Frame Control )域中, 而 将所述第二指示信息承载在 Duration域中。 例如, 所述 Duration域的第二指示 信息指示的 TXOP时限例如为 3.008ms、 1.504ms。
其他 STA接收到所述增强的 PS-POLL帧之后,根据所述 Duration域相应设 置各自的网络分配向量( Network Allocation Vector, 简称 NAV ), 以便允许发送 PS-POLL的 STA在该 TXOP时限内从 AP接收下行数据和向 AP发送上行数据。
如果此时 AP能够将緩存的数据发送给所述 STA, 则在短帧内间隔 ( Short Inter-Frame Space, 简称 SIFS ) 时间后发送数据给所述 STA, 如果此时 AP不能 够将緩存的数据发送给所述 STA,则在 SIFS时间后发送确认( Acknowledgement, 简称 ACK ) 帧给所述 STA。 无论是 STA接收到 AP发送的下行数据还是 ACK 帧, 则都可以在所述第二指示信息所指示的 TXOP时限内向 AP发送上行数据, 即实施步骤 120而无需再次竟争信道。
根据本发明实施例, 步骤 110中, STA向 AP发送的指示帧也可以是 MAC 层的控制帧, 其中所述控制帧可以是控制打包(Control Wrapper )帧, 该控制打 包帧的承载帧控制 ( Carried Frame Control )域承载所述第一信息, 用于指示所 述制打包帧用作 PS-POLL帧, 所述第二信息承载在所述控制打包帧的持续期间 /标识( Duration/ID )域中。例如,所述 Duration/ID域的第二指示信息指示的 TXOP 时限例如为 3.008ms、 1.504ms。 本领域技术人员可以理解, 该控制打包帧中的 其他域可以按照技术要求或者 STA自身的需求来设置。
如上所述, 其他 STA接收到所述控制打包帧之后, 根据所述 Duration/ID域 的第二指示信息相应设置各自的网络分配向量( Network Allocation Vector, 简称 NAV ),以便允许发送该控制打包帧的 STA在该 TXOP时限内从 AP接收下行数 据和向 AP发送上行数据。
根据本发明实施例的另一种替代方案, 步骤 110中, STA向 AP发送的指示 帧也可以是没有 MAC帧头的纯物理层数据帧,例如空数据包(Null Data Packet, 简称 NDP )。 一般来说, NDP包括短训练序列域(Short Training Field, STF )、 长训练序列 1域 ( Long Training Field 1 , 简称 LTF1 )和信号域 ( Signal Field, 简称 SIG )。 根据本发明实施例, 可以在 SIG域承载所述第一信息和第二信息, 其中的第一信息指示该 NDP用作 PS-POLL帧, 并且第二信息指示该 PS-POLL 所预约的信道的时间 /长度。 例如, 所述 SIG域的第二指示信息指示的 TXOP时 限例如为 3.008ms、 1.504ms。 另外, 本领域技术人员可以理解, SIG域还可以 承载 AP的地址以及发送该 NDP的 STA的地址。
根据本发明实施例, 所述指示帧可以包括服务质量(Quality of Service, 简 称 QoS )控制域, 所述 QoS控制域承载的所述指示帧的 QoS级别为接入类别— 视频(Access Category Video, 简称 AC_VI )级别或者接入类别 _语音(Access Category— Voice, 简称 AC— VO )级别, 其中在 AC— VI 级别下, TXOP 时限为 3.008ms, 而在 AC— VO级别下, TXOP时限为 1.504ms。
以上是从 STA的角度来阐述本发明实施例的方案。 与之相对应, 从 AP的 角度来看, 如图 2所示, 本发明实施例的数据传输方法 200包括:
210:接收所述 STA发送的指示帧,其中所述指示帧包括第一指示信息和第 二指示信息, 所述第一指示信息用于指示所述指示帧的类型为节能轮询 PS-POLL帧, 所述第二指示信息用于指示所述指示帧的持续时间;
220: 在所述第二指示信息所指示的持续时间内,接收所述 STA发送的数据 帧。
根据上述内容, 所述指示帧为 MAC层的增强的 PS-POLL帧, 其中所述增 强的 PS-POLL帧在帧控制域承载所述第一指示信息,所述增强的 PS-POLL帧包 括持续期间域, 并在所述持续期间域承载所述第二指示信息。
根据上述内容, 所述指示帧为 MAC层的控制帧, 其中所述控制帧是控制打 包帧, 所述控制打包帧的承载帧控制 Carried Frame Control域承载所述第一指示 信息, 在持续期间 /标识 Duration/ID域承载所述第二指示信息。
根据上述内容, 所述指示帧为 NDP, 其中所述 NDP在信号域承载所述第一 指示信息和所述第二指示信息。
根据上述内容, 所述指示帧可以包括 QoS控制域, 所述 QoS控制域承载的 所述指示帧的 QoS级别为 AC— VI级别或者 AC— VO级别, 其中在 AC— VI级别 下, TXOP时限为 3.008ms, 而在 AC— VO级别下, TXOP时限为 1.504ms。
根据本发明实施例, STA通过指示帧向 AP发送 PS-POLL并且预约信道持 不需要重新竟争信道, 允许 STA在一个 TXOP内实现接收下行数据和发送上行 数据, 节省了 STA竟争信道所消耗的资源, 提升了 STA的能源利用率。
本发明实施例还提出了用于实现本发明实施例的数据传输方法的 AP 和 STA, 以下分别描述。
图 3是根据本发明实施例的站点的示意结构图。 如图 3所示, 根据本发明 实施例的站点 300包括:
发送单元 310, 用于向 AP发送指示帧, 其中所述指示帧包括第一指示信息 和第二指示信息, 所述第一指示信息用于指示所述指示帧的类型为节能轮询 PS-POLL帧, 所述第二指示信息用于指示所述指示帧的持续时;
接收单元 320,用于在所述第二指示信息所指示的持续时间内, STA向所述 AP发送数据帧。
根据本发明实施例, 发送单元 310发送的所述指示帧为 MAC层的增强的 PS-POLL帧, 其中所述增强的 PS-POLL帧在帧控制域承载所述第一指示信息, 所述增强的 PS-POLL帧包括持续期间域, 并在所述持续期间域承载所述第二指 示信息。
根据本发明实施例, 发送单元 310发送的所述指示帧为 MAC层的控制帧, 其中所述控制帧是控制打包帧, 所述控制打包帧的 Carried Frame Control域承载 所述第一指示信息, 在 Duration/ID域承载所述第二指示信息。
根据本发明实施例 ,发送单元 310发送的所述指示帧为 NDP,其中所述 NDP 在信号域承载所述第一指示信息和所述第二指示信息。
根据本发明实施例 ,发送单元 310发送的所述指示帧可以包括 QoS控制域, 所述 QoS控制域承载的所述指示帧的 QoS级别为 AC— VI级别或者 AC— VO级别, 其中在 AC— VI级别下, TXOP时限为 3.008ms, 而在 AC— VO级别下, TXOP时 限为 1.504ms。
图 4 是根据本发明实施例的接入点 400 的示意结构图, 该接入点可以是 WLAN系统中的接入点。 如图 4所示, 接入点 400包括:
接收单元 410, 用于接收所述 STA发送的指示帧, 其中所述指示帧包括第 一指示信息和第二指示信息, 所述第一指示信息用于指示所述指示帧的类型为 PS-POLL帧, 所述第二指示信息用于指示所述指示帧的持续时间;
所述接收单元 410还用于在所述第二指示信息所指示的持续时间内, 接收 所述 STA发送的数据帧。
根据本发明实施例, 接收单元 410接收的所述指示帧为 MAC层的增强的 PS-POLL帧, 其中所述增强的 PS-POLL帧在帧控制域承载所述第一指示信息, 所述增强的 PS-POLL帧包括持续期间域, 并在所述持续期间域承载所述第二指 示信息。
根据本发明实施例, 接收单元 410接收的所述指示帧为 MAC层的控制帧, 其中所述控制帧是控制打包帧, 所述控制打包帧的 Carried Frame Control域承载 所述第一指示信息, 在 Duration/ID域承载所述第二指示信息。
根据本发明实施例,接收单元 410接收的所述指示帧为 NDP,其中所述 NDP 在信号域承载所述第一指示信息和所述第二指示信息。
根据本发明实施例,接收单元 410接收的所述指示帧可以包括 QoS控制域, 所述 QoS控制域承载的所述指示帧的 QoS级别为 AC— VI级别或者 AC— VO级别, 其中在 AC— VI级别下, TXOP时限为 3.008ms , 而在 AC— VO级别下, TXOP时 限为 1.504ms。
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、 或者计算机软件和电子硬件的结合来 实现。 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发明的范围。
所属领域的技术人员可以清楚地了解到, 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。
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, 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。 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 单元来实现本实施例方案的目的。
另外, 在本发明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。
所述功能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, 本发明的技 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)执行本发明各个实施例所述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。

Claims

权利要求
1. 一种数据传输方法, 其特征在于, 所述方法包括:
向接入点 AP发送指示帧,其中所述指示帧包括第一指示信息和第二指示信 息, 所述第一指示信息用于指示所述指示帧的类型为节能轮询 PS-POLL帧, 所 述第二指示信息用于指示所述指示帧的持续时间;
在所述第二指示信息所指示的持续时间内, 向所述 AP发送数据帧。
2. 如权利要求 1所述的方法, 其特征在于,
所述指示帧为媒体接入控制 MAC层的增强的节能轮询 PS-POLL帧, 其中 所述增强的 PS-POLL 帧在帧控制域承载所述第一指示信息, 所述增强的 PS-POLL帧包括持续期间域, 并在所述持续期间域承载所述第二指示信息。
3. 如权利要求 1所述的方法, 其特征在于,
所述指示帧为媒体接入控制 MAC层的控制帧,其中所述控制帧是控制打包 帧, 所述控制打包帧的承载帧控制 Carried Frame Control域承载所述第一指示信 息, 在持续期间 /标识 Duration/ID域承载所述第二指示信息。
4. 如权利要求 1所述的方法, 其特征在于,
所述指示帧为空数据包, 其中所述空数据包在信号域承载所述第一指示信 息和所述第二指示信息。
5. 如权利要求 1至 3任一项所述的方法, 其特征在于, 所述指示帧包括服 务质量控制域, 所述服务质量控制域承载的所述指示帧的服务质量级别为接入 类别—视频 AC— VI级别或接入类别—语音 AC— VO级别。
6. 一种数据传输方法, 其特征在于, 所述方法包括:
接收所述 STA发送的指示帧, 其中所述指示帧包括第一指示信息和第二指 示信息, 所述第一指示信息用于指示所述指示帧的类型为 PS-POLL帧, 所述第 二指示信息用于指示所述指示帧的持续时间;
在所述第二指示信息所指示的持续时间内, 接收所述 STA发送的数据帧。
7. 如权利要求 6所述的方法, 其特征在于,
所述指示帧为媒体接入控制 MAC层的增强的 PS-POLL帧, 其中所述增强 的 PS-POLL帧在帧控制域承载所述第一指示信息,所述增强的 PS-POLL帧包括 持续期间域 , 并在所述持续期间域承载所述第二指示信息。
8. 如权利要求 6所述的方法, 其特征在于,
所述指示帧为 MAC层的控制帧, 其中所述控制帧是控制打包帧, 所述控制 打包帧的 Carried Frame Control域承载所述第一指示信息, 在 Duration/ID域承 载所述第二指示信息。
9. 如权利要求 6所述的方法, 其特征在于,
所述指示帧为空数据包, 其中所述空数据包在信号域承载所述第一指示信 息和所述第二指示信息。
10. 如权利要求 6至 9任一项所述的方法, 其特征在于, 所述指示帧包括 服务质量控制域, 所述服务质量控制域承载的所述指示帧的服务质量级别为 AC— VI级别或 AC— VO级别。
11. 一种站点, 其特征在于, 所述站点包括:
发送单元, 用于向 AP发送指示帧, 其中所述指示帧包括第一指示信息和第 二指示信息, 所述第一指示信息用于指示所述指示帧的类型为 PS-POLL帧, 所 述第二指示信息用于指示所述指示帧的持续时间;
接收单元, 用于在所述第二指示信息所指示的持续时间内, STA向所述 AP 发送数据帧。
12. 如权利要求 11所述的站点, 其特征在于,
所述发送单元发送的所述指示帧为 MAC层的增强的 PS-POLL帧, 其中所 述增强的 PS-POLL帧在帧控制域承载所述第一指示信息,所述增强的 PS-POLL 帧包括持续期间域, 并在所述持续期间域承载所述第二指示信息。
13. 如权利要求 11所述的站点, 其特征在于,
所述发送单元发送的所述指示帧为 MAC层的控制帧,其中所述控制帧是控 制打包帧, 所述控制打包帧的 Carried Frame Control域承载所述第一指示信息, 在 Duration/ID域承载所述第二指示信息。
14. 如权利要求 11所述的站点, 其特征在于,
所述发送单元发送的所述指示帧为 NDP,其中所述 NDP在信号域承载所述 第一指示信息和所述第二指示信息。
15. 如权利要求 11至 14任一项所述的站点, 其特征在于,
所述发送单元发送的所述指示帧包括服务质量控制域, 所述服务质量控制 域承载的所述指示帧的服务质量级别为 AC— VI级别或 AC— VO级别。
16. 一种接入点, 其特征在于, 所述接入点包括:
接收单元, 用于接收所述 STA发送的指示帧, 其中所述指示帧包括第一指 示信息和第二指示信息, 所述第一指示信息用于指示所述指示帧的类型为 PS-POLL帧, 所述第二指示信息用于指示所述指示帧的持续时间;
所述接收单元还用于在所述第二指示信息所指示的持续时间内, 接收所述 STA发送的数据帧。
17. 如权利要求 16所述的接入点, 其特征在于,
所述接收单元接收的所述指示帧为 MAC层的增强的 PS-POLL帧, 其中所 述增强的 PS-POLL帧在帧控制域承载所述第一指示信息,所述增强的 PS-POLL 帧包括持续期间域, 并在所述持续期间域承载所述第二指示信息。
18. 如权利要求 16所述的接入点, 其特征在于,
所述接收单元接收的所述指示帧为 MAC层的控制帧,其中所述控制帧是控 制打包帧, 所述控制打包帧的 Carried Frame Control域承载所述第一指示信息, 在 Duration/ID域承载所述第二指示信息。
19. 如权利要求 16所述的接入点, 其特征在于,
所述接收单元接收的所述指示帧为 NDP,其中所述 NDP在信号域承载所述 第一指示信息和所述第二指示信息。
20. 如权利要求 16至 19任一项所述的接入点, 其特征在于,
所述接收单元接收的所述指示帧包括服务质量控制域, 所述服务质量控制 域承载的所述指示帧的服务质量级别为 AC VI级别或 AC VO级别。
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