WO2014139314A1 - 无线局域网中的数据传输方法和系统 - Google Patents

无线局域网中的数据传输方法和系统 Download PDF

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Publication number
WO2014139314A1
WO2014139314A1 PCT/CN2013/091031 CN2013091031W WO2014139314A1 WO 2014139314 A1 WO2014139314 A1 WO 2014139314A1 CN 2013091031 W CN2013091031 W CN 2013091031W WO 2014139314 A1 WO2014139314 A1 WO 2014139314A1
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WIPO (PCT)
Prior art keywords
station
transmission opportunity
site
transmission
wireless frame
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2013/091031
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English (en)
French (fr)
Inventor
韩志强
吕开颖
邢卫民
李楠
孙波
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ZTE Corp
Original Assignee
ZTE Corp
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 ZTE Corp filed Critical ZTE Corp
Priority to JP2015561912A priority Critical patent/JP6192746B2/ja
Priority to EP13878442.6A priority patent/EP2955882B1/en
Priority to MX2015011746A priority patent/MX355711B/es
Priority to US14/771,809 priority patent/US9847827B2/en
Publication of WO2014139314A1 publication Critical patent/WO2014139314A1/zh
Anticipated expiration legal-status Critical
Priority to ZA2015/07525A priority patent/ZA201507525B/en
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/04—Scheduled access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/22—Parsing or analysis of headers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
    • H04W74/0816—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA] with collision avoidance
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • 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]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/04—Terminal devices adapted for relaying to or from another terminal or user
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices

Definitions

  • the present invention relates to the field of wireless communications, and in particular, to a data transmission method and system in a wireless local area network.
  • WLANs wireless local area networks
  • IEEE 802.il group of the Institute of Electrical and Electronic Engineers (IEEE) industrial specification a series of standard WLAN technologies such as 802.11a, 802.11b, and 802.1 lg have been defined, and subsequently appeared.
  • IEEE 802.11ah task group mainly develops WLAN air interface standards using unlicensed bands below the 1GHz band to support new network applications such as smart grids and sensor networks.
  • the basic structure of a WLAN refers to a basic service set (BSS), which includes an access point (AP) and a plurality of stations (Stations, STAs) associated with the AP.
  • BSS basic service set
  • 802.11 defines two modes of operation: Distributed Coordination Function (DCF) and Point Coordination Function (PCF), and improvements for these two modes of operation: Enhanced Distributed Coordination Access (Enhanced Distributed CoordinationAccess (EDCA) function and hybrid coordination function called HCFCCA).
  • DCF is the most basic operation mode
  • CSMA carrier Sense Multiple Access with Collision Avoidance
  • the EDCA function is an enhanced mode of operation. Based on the CSMA/CA mechanism, multiple different priority queues are used to share the wireless channel, and the data of each priority queue is transmitted in units of Transmission Opportunity (TXOP).
  • TXOP Transmission Opportunity
  • the relay is composed of two functional entities, where the first functional entity (Relay-STA, R-STA) and the second functional entity (Rt-AP) are in the same BSS, ie, BSS1;
  • the access point (Relay-AP, R-AP) and the STA are in another BSS, ie, BSS2.
  • Display confirmation means that the data sent by the AP is acknowledged using a separate acknowledgement frame, as shown in Figure 2.
  • Implicit acknowledgement refers to the use of an implicit acknowledgement to the data sent by the AP. This implicit acknowledgement is included in the relay.
  • the data sent to the STA is shown in Figure 3. When the STA sends uplink data to the AP through the relay, the same scheme can also be used.
  • the above scheme is applicable to one frame transmission.
  • an AP or STA competes for a channel and has multiple frames for transmission
  • the control right of the channel is not in the competition to the party of the channel, but Controlled by the relay, it is not conducive to the control of the channel to the party to the channel and the transmission of subsequent frames.
  • the AP or the STA may transmit multi-frame transmissions to the relay. In this case, the channel needs to be controlled. This conflicts with the channel that the relay can control the AP or STA to compete.
  • Embodiments of the present invention provide a data transmission method and system in a wireless local area network, which solves the problem that an existing transmission opportunity sharing mechanism affects data transmission efficiency.
  • the embodiment of the present invention provides a data transmission method in a wireless local area network, including: the first station sends a radio frame to the second station in the obtained transmission opportunity, and carries the second station in the radio frame.
  • the notification information that the transmission opportunity communicates with the third site.
  • the first site is an access point (AP)
  • the second site is a relay
  • the third site is a site (STA).
  • the first site is a STA
  • the second site is a relay
  • the third site is
  • the sending, by the first station, the radio frame to the second station in the obtained transmission opportunity comprises: sending, by the first station, the radio frame to the first functional entity of the second station in the obtained transmission opportunity.
  • the radio frame carries the notification information in a physical frame header or a Media Access Control (MAC) frame header, where the notification information is a 1-bit or multi-bit information bit or a signaling bit;
  • the notification information indicates whether the second station can communicate with the third station using the transmission opportunity.
  • MAC Media Access Control
  • the notification information indicates that the second station is allowed to use the transmission opportunity to communicate with the third station
  • the physical frame header or the MAC frame header is further carried in the The transmission duration limit of the second station to the third station communication.
  • a starting boundary of the transmission duration limit of the second station to the third station communication is a boundary of the radio frame completion that is transmitted to the second station by the first station.
  • the termination boundary of the transmission duration limit of the second station to the third station communication is a direction after the transmission time limit of the second station to the third station communication is superimposed from the start boundary. The border.
  • the method further includes: when the notification information indicates that the second station is allowed to use the transmission opportunity to communicate with the third station, the first station sends a wireless transmission in the obtained transmission opportunity. After the frame is given to the second site,
  • Radio frame carries information of 1 bit or multiple bits, where the information indicates that the second station accepts the first station Indicates the use of the transmission opportunity.
  • the method further includes: after the first station receives the wireless frame sent by the second station,
  • the first site goes to sleep.
  • the method further includes: when the notification information indicates that the second station is allowed to use the transmission opportunity to communicate with the third station, the first station sends a wireless transmission in the obtained transmission opportunity. After the frame is given to the second site,
  • Radio frame sent by the second station, where the radio frame carries information of 1 bit or multiple bits, where the information indicates that the second station does not accept the first station
  • the indication uses the transmission opportunity.
  • the method further includes: after the first station receives the wireless frame sent by the second station,
  • the first station continues to use the transmission opportunity or releases the transmission opportunity.
  • the method further includes: when the notification information indicates that the second station is allowed to use the transmission opportunity to communicate with the third station, the first station sends a wireless transmission in the obtained transmission opportunity. After the frame is given to the second site,
  • the second station transmits a radio frame to the third station during the remaining transmission opportunity time, wherein the termination boundary of the time falls within the termination boundary of the transmission time limit of the second station to the third station communication.
  • the remaining transmission opportunity time is reserved in a physical frame header or a MAC frame header of a radio frame sent by the second station to the third station.
  • the termination boundary of the remaining transmission opportunity time falls within a termination boundary of the transmission duration limit of the second station to the third station communication.
  • the method further includes: after the second station sends a radio frame to the third station in a remaining transmission opportunity time,
  • the second station continues to send the radio frame to be sent to other stations by using the remaining remaining transmission opportunity time.
  • the method further includes: after the second station sends a radio frame to the third station in a remaining transmission opportunity time,
  • the second station When the third station sleeps and cannot receive the radio frame, the second station continues to send the radio frame to be sent to other stations by using the remaining remaining transmission opportunity time.
  • the method further includes: after the second station sends a radio frame to the third station in a remaining transmission opportunity time,
  • the second station requests the first station to release the transmission opportunity, requesting that the control of the transmission opportunity be returned to the first station.
  • the embodiment of the present invention further provides a data transmission method in a wireless local area network, including: receiving, by a second station, a radio frame sent by a first station in a transmission opportunity obtained by the first station, where, in the radio frame Carrying notification information for communicating with the third site using the transmission opportunity to the second site.
  • the first site is an access point (AP)
  • the second site is a relay
  • the third site is a site (STA).
  • the first site is a STA
  • the second site is a relay
  • the third site is
  • the radio frame carries the notification information in a physical frame header or a medium access control (MAC) frame header, where the notification information is a 1-bit or multi-bit information bit or a signaling bit; the notification information indication Whether the second site can communicate with the third site using the transmission opportunity.
  • MAC medium access control
  • the method further includes: when the notification information indicates that the second station is allowed to use the transmission opportunity to communicate with the third station, the second station receives the first station in the After a wireless frame sent in a transmission opportunity obtained by a site,
  • the second station uses 1 bit or more bits in a subsequent radio frame sent to the first station, instructing the second station to accept the permission of the first station, and using the transmission opportunity to the first
  • the three stations send wireless frames.
  • the method further includes: when the notification information indicates that the second station is allowed to use the transmission opportunity to communicate with the third station, the second station receives the first station in the After a wireless frame sent in a transmission opportunity obtained by a site,
  • the second station uses 1 bit or more bits in a subsequent radio frame sent to the first station, indicating that the second station does not accept the permission of the first station, and continues to be used by the first station.
  • the transmission opportunity further includes: after the second station receives the radio frame sent by the first station in the transmission opportunity obtained by the first station,
  • the second functional entity of the second station sends a radio frame to the third station.
  • the embodiment of the present invention further provides a data transmission system in a wireless local area network, including a first station, a second station, and a third station, where:
  • the first station is configured to: send a radio frame to the second station in the obtained transmission opportunity, and carry in the radio frame to use the transmission opportunity and the third station to the second station Notification information for communication;
  • the second station is configured to: receive a radio frame sent by the first station in a transmission opportunity obtained by the first station, where the radio frame carries the transmission to the second station A notification message that the opportunity to communicate with the third site.
  • the first site is an access point (AP)
  • the second site is a relay
  • the third site is a site (STA).
  • the first site is a STA
  • the second site is a relay
  • the third site is
  • the radio frame carries the notification information in a physical frame header or a medium access control (MAC) frame header, where the notification information is a 1-bit or multi-bit information bit or a signaling bit; the notification information indication Whether the second site can communicate with the third site using the transmission opportunity.
  • MAC medium access control
  • the second site is further configured to: subsequently send to the first site when the notification information indicates that the second site is allowed to use the transmission opportunity to communicate with the third site Using 1 bit or more bits in the radio frame, instructing the second station to accept the permission of the first station, and using the transmission opportunity to send a radio frame to the third station;
  • the first station is further configured to: receive a radio frame sent by the second station, and go to sleep.
  • the second site is further configured to: subsequently send to the first site when the notification information indicates that the second site is allowed to use the transmission opportunity to communicate with the third site Using 1 bit or more bits in the radio frame, indicating that the second station does not accept the permission of the first station, and does not use the transmission opportunity to send a radio frame to the third station;
  • the first station is further configured to: receive a radio frame sent by the second station, and continue to use the transmission opportunity.
  • the data transmission method and system in the wireless local area network provided by the embodiment of the present invention implements the transmission opportunity control right management under the control of the first station, and solves the problem that the existing transmission opportunity sharing mechanism affects the data transmission efficiency.
  • Figure 1 is a schematic diagram of a system of relays in a WLAN
  • 3 is a schematic diagram of implicit confirmation in relay resource sharing
  • FIG. 4 is a schematic diagram of a frame exchange in which an access point obtains a transmission opportunity shared to a relay;
  • FIG. 5 is a schematic diagram of a frame exchange in which a station obtains a transmission opportunity shared to a relay;
  • Figure 6 is a schematic diagram of a reservation transmission opportunity at the frame header
  • Figure 7 is a schematic diagram of implicitly confirmed transmission opportunity sharing
  • FIG. 8 is a schematic diagram of a short frame protection channel after transmission opportunity sharing
  • Figure 9 is a schematic diagram of transmission to a multi-site after transmission opportunity sharing
  • 10 is a schematic diagram of an aggregate frame transmission sharing
  • Figure 11 is a schematic diagram including sharing of rejection transmission opportunities
  • FIG. 12 is a schematic structural diagram of a data transmission system in a wireless local area network according to an embodiment of the present invention.
  • the AP may have multi-frame transmissions that need to control the channel. In this case, it is more necessary to effectively control the transmission opportunities to ensure the stability and efficiency of data transmission.
  • an embodiment of the present invention provides a data transmission method and system in a wireless local area network, and a technical solution provided by an embodiment of the present invention provides a site (such as an AP or an STA) that initiates data transmission for the above problem.
  • the method of controlling the transmission opportunity solves the problem of transmission opportunity management when sharing transmission opportunities by multiple parties, improves the transmission efficiency of multi-frames, and reduces the delay of data transmission.
  • the first station detects the channel and competes for the opportunity to transmit through the CSMA/CA mechanism.
  • a radio frame is transmitted to the second station. And indicating, in the radio frame, whether the second station is allowed to share the transmission opportunity obtained by the first station by using 1-bit or multi-bit information bits or signaling bits, if 1-bit or multi-bit information bits or signaling bits in the radio frame.
  • the meaning of the indication means that the second station is not allowed to share the transmission opportunity obtained by the first station, and then the second station sends an acknowledgement to the first station according to the confirmation policy of the radio frame. After the first site is confirmed, it can continue to send data to the second site or other sites.
  • the total transmission duration limit of the second station and the third station communication may be indicated at the same time.
  • the 1-bit or multi-bit information bits or signaling bits indicated by the first station received by the second station to the local station indicate that the site is allowed to share the transmission opportunity obtained by the first station, then the first The second station may confirm the radio frame sent by the first station according to the acknowledgment policy or implicit acknowledgment of the radio frame, and include, in the acknowledgment information sent to the first station, whether the second station accepts the transmission opportunity shared by the first station.
  • the second station If the second station indicates in the acknowledgment transmitted to the first station that the first station uses the transmission opportunity for the second station by the information bit, the second station is at the short interframe interval of the acknowledgment (Short Inter -Frame Space, SIFS ) cannot transfer data to the third site. After receiving the radio frame shared by the second station and not accepting the transmission opportunity, the first station can continue to send data to other stations after SIFS.
  • SIFS Short Inter -Frame Space
  • the second station may go to the third after the confirmed SIFS.
  • the time at which the site sends data, the second site and the third site transmission (including previous acknowledgments) cannot exceed the transmission duration limit made by the first site.
  • the second site finds that the third site is dormant, then the second site transmits data to the other sites in the obtained shared transmission opportunity.
  • the first site can go to sleep after receiving the indication that the second site accepts the sharing of the transmission opportunities. If the second station transmits the data transmitted to the third station after accepting the transmission opportunity sharing of the first station, the second station may continue to use the shared transmission opportunity to send data to other stations or to share the shared transmission opportunity. Give the first site.
  • the first station may transmit data to other relays or STAs after SIFS.
  • the above frame exchange cannot exceed the transmission opportunity limit of the first site.
  • An application scenario of the embodiment of the present invention is an embodiment in which three parties in a wireless local area network share transmission opportunities, including an AP, a relay, and a STA, as shown in FIG. 1.
  • the notification information that the second station uses the transmission opportunity to communicate with the third station is represented by a relay transmission opportunity sharing domain, and the notification information (the relay transmission opportunity sharing domain) may be 1 a bit or a multi-bit information bit or a signaling bit, the notification information indicating whether the second station can communicate with the third station by using the transmission opportunity, and exemplifying 1 bit as an example.
  • the case where the AP is the first station, the relay is the second station, and the STA is the third station is taken as an example for description.
  • the AP has radio frames to be transmitted to the STA through the relay.
  • the AP starts detecting channels and competes for transmission opportunities through the CSMA/CA mechanism.
  • the AP starts transmitting the radio frame to the relay, and sets the relay transmission opportunity sharing domain of the radio frame to 0, indicating that the transmission opportunity sharing has not been performed.
  • the AP sends a radio frame to the first functional entity of the relay.
  • the relay After receiving the radio frame sent by the AP, the relay checks that the value of the relay transmission opportunity shared domain carried by the radio frame is 0, and the relay confirms the received radio frame (Acknowledgement, ACK) after the SIFS. After responding to the ACK, the relay cannot directly send a radio frame to the STA after SIFS. After receiving the response from the relay, the AP continues to transmit the radio frame to the relay after the SIFS, and reserves the transmission duration limit of the second station to the third station communication in the physical frame header or the MAC frame header of the radio frame. And the relay transmission opportunity sharing domain carried by the radio frame is set to 1, indicating that the use of the subsequent transmission opportunity is controlled by the relay, but the relay cannot extend the AP reservation time t0 in the subsequent transmission.
  • the starting boundary of the transmission duration limit t0 of the second station to the third station communication is the boundary of the radio frame completed at the first station to the second station, and the termination boundary is from the beginning
  • the start boundary superimposes the transmission duration of the second station to the third station communication to limit the boundary to the rear.
  • the relay After receiving the radio frame of the AP, the relay checks that the value of the relay transmission opportunity shared domain carried by the radio frame is 1, and the relay can confirm or implicitly confirm the received radio frame after the SIFS (here) Take the display as an example).
  • the relay responds to the ACK, the relay transmission opportunity sharing domain is set to 1 or the ACK indication is set to 11 or another bit is used to indicate that the transmission opportunity sharing of the AP is accepted.
  • the relay After responding to the ACK, the relay directly sends a radio frame to the STA after the SIFS, and reserves the remaining transmission opportunity time t1 in the physical frame header or the MAC frame header of the radio frame, and the time termination boundary of tl cannot exceed the time termination boundary of t0. , As shown in Figure 6. Or, after responding to the ACK, the relay performs channel reservation with the STA after the SIFS. As shown in FIG. 8, the Request to Send (RTS) frame and the Clear to Send (CTS) frame or other frames are used for the channel. After the reservation, wireless frame transmission is performed.
  • RTS Request to Send
  • CTS Clear to Send
  • the AP After receiving the radio frame of the relay display confirmation or implicit confirmation, the AP checks whether the relay accepts the current transmission opportunity sharing (the radio frame carries information of 1 bit or multiple bits, the information indicates the Whether the second site accepts the indication of the first site to use the transmission opportunity). If the relay is indicated to accept transmission opportunity sharing in the display acknowledgment or implicit acknowledgment, the AP may go to sleep in the remaining TXOP or wait for the relay to exchange transmission opportunities or release the transmission opportunity. If the display indicates that the relay does not accept transmission opportunity sharing, the AP can transmit data to other relays or STAs after SIFS, as shown in Figure 11.
  • the STA sends an acknowledgment to the relay after receiving the SIFS of the radio frame.
  • the relay checks whether the remaining transmission opportunity control time is still enough for a frame exchange. If the remaining time can perform a frame exchange, the relay continues to send the radio frame to the STA in the same manner until the radio frame is transmitted or the transmission opportunity is completed. The remaining time is not enough for a frame exchange.
  • the relay can use the transmission termination frame (ie, the Contention Free-End (CF-End) frame) to release the remaining transmission opportunities.
  • the AP can be in the SIFS. After that, the transmission transmission terminates the frame and releases the transmission opportunity.
  • the relay After receiving the transmission opportunity of the AP, the relay can also return the transmission opportunity to the AP.
  • the method can be used to send the control of the transmission opportunity by sending a radio frame implicit indication or displaying an indication to the AP to release the transmission opportunity. Give the first site AP.
  • the AP After the relay returns the transmission opportunity, the AP can send data to the relay or STA after SIFS.
  • a case where the STA is the first station, the relay is the second station, and the AP is the third station is taken as an example for description.
  • the STA has multiple frames to transmit to the AP.
  • the STA starts to detect the channel and competes for the opportunity to transmit through the CSMA/CA mechanism.
  • the STA starts transmitting data (radio frame) to the relay, and sets the relay transmission opportunity sharing domain carried by the physical frame header or the MAC frame header of the radio frame.
  • a value of 0 indicates that the transmission opportunity sharing has not been made to the relay.
  • the STA transmits a radio frame to the first functional entity of the relay.
  • the relay After receiving the data of the STA, the relay checks that the value of the shared domain of the relay transmission opportunity is 0, and the relay ACKs the received data after SIFS. After the relay responds to the ACK, it cannot send data directly to the AP after SIFS.
  • the STA After receiving the response of the relay, the STA transmits the radio frame to the relay after the SIFS, and reserves the transmission duration limit t0 of the second station to the third station communication in the physical frame header or the MAC frame header of the radio frame, and
  • the relay transmission opportunity sharing domain carried by the radio frame is set to 1, indicating that the use of subsequent transmission opportunities is controlled by the relay, but the relay cannot extend the STA reservation time t0 in subsequent transmissions.
  • the start boundary of the transmission duration limit to of the second station to the third station communication is the boundary of the radio frame completed at the first station to the second station, and the termination boundary is from the beginning The start boundary superimposes the transmission duration of the second station to the third station communication to limit the boundary to the rear.
  • the relay After receiving the STA's data (radio frame), the relay checks the value of the relay transmission opportunity shared domain to 1. The relay confirms the received data after SIFS.
  • the wireless frame can be displayed for confirmation or implicit confirmation (herein the display is taken as an example).
  • the relay responds to the ACK, the relay transmission opportunity sharing domain is set to 1 or the ACK indication is set to 11 or another bit is used, indicating that the receiving STA's transmission opportunity is shared.
  • the relay After responding to the ACK, the relay sends data directly to the AP after SIFS.
  • the AP sends an ACK response to the relay after receiving the SIFS of the data.
  • the relay checks whether the remaining transmission opportunity usage time is still enough for one frame exchange. If the remaining time can perform frame exchange, the relay continues to send data to the AP in the same manner until the data transmission is completed or the transmission opportunity remains. Not enough time for a frame exchange.
  • the STA After receiving the display confirmation or implicit confirmation of the relay, the STA checks whether the relay accepts the transmission opportunity sharing. If the relay is instructed to accept the transmission opportunity sharing in the display confirmation or the implicit confirmation, the STA can go to sleep. If the display confirmation indicates that the relay does not accept transmission opportunity sharing, the STA may continue to transmit data to the relay or release the current transmission opportunity or go to sleep.
  • an AP is used as the first station
  • the relay is the second station
  • the STA is the third station.
  • the AP has a radio frame transmitted to the STA.
  • the AP starts detecting channels and competes for transmission opportunities through the CSMA/CA mechanism.
  • the AP starts transmitting data (radio frame) to the relay, and sets the relay transmission opportunity sharing domain carried by the physical frame header or the MAC frame header of the radio frame to 0. , indicating that there is no transmission opportunity sharing.
  • the AP sends a radio frame to the first functional entity of the relay.
  • the relay After receiving the data of the AP, the relay checks that the value of the shared domain of the relay transmission opportunity is 0, and the relay ACKs the received data after SIFS. After the relay responds to the ACK, it cannot send data directly to the STA after SIFS.
  • the AP After receiving the response from the relay, the AP continues to transmit data to the relay after SIFS, and sets the relay transmission opportunity sharing field of the data to 1, indicating that the use of subsequent transmission opportunities is controlled by the relay.
  • the relay After receiving the data of the AP, the relay checks that the value of the shared domain of the relay transmission opportunity is 1, and the relay is in SIFS. After confirming the received data.
  • the radio frame can be displayed for confirmation or implicit confirmation (here as an implicit example).
  • the relay transmission opportunity sharing domain is set to 1 or the ACK indication is set to 11 or another bit is used, indicating that the relay receiving AP shares the transmission opportunity.
  • the STA sends an ACK response to the relay after receiving the SIFS of the data.
  • the relay checks whether the remaining time is enough for a frame exchange. If the remaining time can perform a frame exchange, the relay continues to send data to the STA in the same manner until the data is sent or the transmission time is insufficient. Perform a frame exchange.
  • the AP After receiving the implicit confirmation of the relay, the AP checks whether the relay accepts the transmission opportunity sharing. If the relay is instructed to accept the transmission opportunity sharing in the implicit acknowledgment, then the AP waits for the relay to return to the transmission or re-compete the channel. If the implicit acknowledgment indicates that the relay does not accept the transmission opportunity, and the transmission is shared by the AP after receiving the transmission opportunity, the transmission opportunity may be returned to the AP by using a wireless frame implicit indication or The display indicates the return of the transmission opportunity. After the relay returns the transmission opportunity, the AP can send data to the relay or STA after SIFS.
  • the case where the AP is the first site, the relay is the second site, and the STA A is the third site is taken as an example for description.
  • the radio frame is sent to STA A through the relay.
  • the AP starts to detect the channel and competes for the transmission opportunity through the CSMA/CA mechanism.
  • the AP starts transmitting radio frames to the relay, and the transmission duration limit t0 of the reserved relay and STA A communication in the radio frame.
  • the AP sends a radio frame to the first functional entity of the relay.
  • the start boundary of the transmission duration limit t0 relayed to the STA A communication is a boundary at which the radio frame is transmitted; the termination boundary of t0 is a boundary pointed after superimposing t0 from the start boundary.
  • the relay and STA A communication cannot exceed the termination boundary of t0.
  • the relay transmission opportunity sharing domain carried by the physical frame header or the MAC frame header of the radio frame is set to 1, indicating that the relay is allowed to obtain the control right of the channel after receiving the radio frame.
  • the relay After receiving the radio frame of the AP, the relay checks that the value of the relay transmission opportunity shared domain carried by the radio frame is 1, and the relay can confirm or implicitly confirm the received radio frame after the SIFS (here) Take the display as an example).
  • the relay transmission opportunity sharing domain is set to 1 or the ACK indication is set to 11 or another bit is used to indicate the transmission opportunity sharing of the receiving AP.
  • the relay responds to the ACK after receiving the SIFS of the radio frame. If the relay finds that the STA A is in the dormant state, the relay can send data to the other station STA B after the SIFS after the ACK.
  • the relay transmits the radio frame to STA B, there is still a remaining transmission opportunity, and the transmission can be continued to other stations until the radio frame that can be transmitted is completed or the remaining time of the transmission opportunity is insufficient for one frame exchange.
  • the relay may be implicitly or displayed through the radio frame. Instructing to release the transmission opportunity, the AP regains control of the channel.
  • the AP After receiving the display confirmation or implicit confirmation of the relay, the AP checks whether the relay has accepted this transmission opportunity sharing. If the relay is instructed to accept the transmission opportunity sharing in the display confirmation or the implicit confirmation, the AP waits for the relay to return to the transmission opportunity, or re-compete the channel. If the display indicates that the relay does not accept transmission opportunity sharing, then the AP can transmit to other relays or STAs after SIFS.
  • the case where the AP is the first site, the relay is the second site, and the STA A is the third site is taken as an example for description.
  • the AP has a radio frame to be transmitted to the STA A through the relay, and the radio frame (which uses aggregation technology to aggregate multiple unicast frames in the MAC layer or the physical (PHY) layer.
  • Unicast data for two target sites, STA A and STA B, is included in the radio frame.
  • the AP starts transmitting the radio frame to the relay, and the transmission duration limit t0 of the reserved relay and the STA A communication in the radio frame.
  • the AP sends a radio frame to the first functional entity of the relay.
  • the relay to The starting boundary of the transmission duration limit t0 of the STA A communication is a boundary at which the radio frame is transmitted; the termination boundary of t0 is a boundary pointed by superimposing t0 from the starting boundary. Relay and STA communication cannot exceed the termination boundary of to.
  • the relay After the acknowledgment response to the radio frame, the relay sends a radio frame to the STA A after the SIFS. After receiving the radio frame sent by the relay to the STA, the STA A confirms the radio frame after the SIFS according to the acknowledgment policy. After the relay receives the acknowledgment from STA A, if the time of the remaining transmission opportunity can be exchanged once, the relay continues to send data to STA B in the same manner until the relay
  • an embodiment of the present invention provides a data transmission system in a wireless local area network, including:
  • the first site 121, the second site 122, and the third site 123 wherein:
  • the first station 121 is configured to: send a radio frame to the second station 122 in the obtained transmission opportunity, and carry the use of the transmission opportunity and the third station 123 to the second station 122 in the radio frame. Notification information for communication;
  • the second station 122 is configured to: receive a radio frame sent by the first station 121 in a transmission opportunity obtained by the first station 121, where the radio frame carries the second station 122 The notification information that the transmission opportunity communicates with the third site 123.
  • the first site 121 is an AP
  • the second site 122 is a relay
  • the third site 123 is a STA.
  • the first site 121 is a STA
  • the second site 122 is a relay
  • the third site 123 is an AP.
  • the radio frame carries the notification information in a physical frame header or a MAC frame header, where the notification information is a 1-bit or multi-bit information bit or a signaling bit; the notification information indicates the second site 122 can communicate with the third site 123 using the transmission opportunity.
  • the second site 122 is further configured to: when the notification information indicates that the second site 122 is allowed to use the transmission opportunity to communicate with the third site 123, Using 1 bit or more bits in the radio frame sent by the first station 121, indicating that the second station 122 accepts the permission of the first station 121, and uses the transmission opportunity to send a radio frame to the third station 123;
  • the first station 121 is further configured to: receive the radio frame sent by the second station 122, and enter sleep.
  • the second site 122 is further configured to: when the notification information indicates that the second site 122 is allowed to use the transmission opportunity to communicate with the third site 123, subsequently to the first Using one or more bits in the radio frame sent by the station 121, indicating that the second station 122 does not accept the permission of the first station 121, and does not use the transmission opportunity to send a radio frame to the third station 123;
  • the first station 121 is further configured to: receive the radio frame sent by the second station 122, and continue to use the transmission opportunity.
  • the notification information indicates that the second station 122 is allowed to communicate with the third station 123 by using the transmission opportunity
  • the physical frame header or the MAC frame header is further carried in the The transmission duration limit of the communication between the second station 122 and the third station 123 is limited.
  • the starting boundary of the transmission duration limitation of the communication between the second station 122 and the third station 123 is completed by the radio frame that is transmitted to the second station 122 by the first station 121. boundary.
  • the termination boundary of the transmission duration limit of the communication between the second station 122 and the third station 123 is that the second station 122 is connected to the third station 123 from the start boundary.
  • the second station 122 is further configured to: send a radio frame to the third station 123, and reserve a remaining transmission opportunity time in a physical frame header or a MAC frame header of the radio frame, where the point 123 Prohibit relaying; and
  • the third station 123 is configured to: receive the radio frame sent by the second station 122.
  • the third site 123 is a radio frame that is sent by the second functional entity that receives the second site 122.
  • the termination boundary of the remaining transmission opportunity time falls within a termination boundary of the transmission duration limit of the second station 122 to the third station 123 communication.
  • the second station 122 is further configured to: send, to all, the third station 123, a radio frame to be sent.
  • the second station 122 is further configured to: when the third station 123 sleeps unable to receive the radio frame, continue to send the to-be-sent radio frame to other stations by using the remaining remaining transmission opportunity time.
  • the second site is further configured to: request the first site 121 to release the transmission opportunity, and request to return control of the transmission opportunity to the first site 121.
  • the radio frame includes unicast data of the third site 123 and one or more other sites;
  • the second station 122 is further configured to: after all the radio frames to be sent to the third station 123 are sent, use the remaining remaining transmission opportunity time to send the unicast data to the one or more other stations.
  • the radio frame includes unicast data of the third site 123 and one or more other sites;
  • the second station 122 is further configured to: when the third station 123 is unable to receive the radio frame, use the remaining remaining transmission opportunity time to send the unicast data to the one or more other stations.
  • the second site 122 is further configured to: indicate, in the notification information, the second site
  • the transmission opportunity When the transmission opportunity is not used to communicate with the third station 123, it continues to wait to receive subsequent radio frames or competing channels transmitted by the first station 121.
  • a data transmission method and system in a wireless local area network a first station transmits a radio frame to a second station in an obtained transmission opportunity, and carries the pair in the radio frame
  • the second station uses the notification information that the transmission opportunity communicates with the third station, realizes the transmission opportunity control right management under the control of the first station, and solves the problem that the existing transmission opportunity sharing mechanism affects the data transmission efficiency.
  • the AP transmits the transmission opportunity control of the relay
  • the STA authorizes the transmission opportunity control of the relay.
  • the successful use of transmission opportunities to control and manage the use of transmission opportunities can better meet the needs of data transmission.
  • steps of the foregoing embodiments may also be implemented by using an integrated circuit. These steps may be separately fabricated into individual integrated circuit modules, or multiple modules or steps may be fabricated into a single integrated circuit module. achieve.
  • embodiments of the invention are not limited to any specific combination of hardware and software.
  • the various devices/function modules/functional units in the above embodiments may be implemented using a general-purpose computing device, which may be centralized on a single computing device or distributed over a network of multiple computing devices.
  • Each device/function module/functional unit in the above embodiments can be stored in a computer readable storage medium when implemented in the form of a software function module and sold or used as a standalone product.
  • the above mentioned computer readable storage medium may be a read only memory, a magnetic disk or an optical disk or the like.
  • the method and system provided by the embodiments of the present invention implement the control of the transmission control under the control of the first station, and solve the problem that the existing transmission opportunity sharing mechanism affects the data transmission efficiency.

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Abstract

一种无线局域网中的数据传输方法和系统。该方法包括：第一站点在获得的传输机会中发送无线帧给第二站点，并在所述无线帧中携带对所述第二站点使用所述传输机会与第三站点进行通信的通知信息。本发明实施例提供的技术方案适用于无线局域网数据中继过程中的传输机会管理，实现了第一站点控制下的传输机会控制权管理。

Description

无线局域网中的数据传输方法和系统
技术领域
本发明涉及无线通信领域， 尤其涉及一种无线局域网中的数据传输方法 和系统。
背景技术
目前，在无线网络领域，无线局域网（ Wireless Local Area Network , WLAN ) 快速发展，对 WLAN的应用需求日益增长。 电气和电子工程师协会（Institute of Electrical and Electronic Engineers, IEEE )工业规范 IEEE802.i l组中， 先 后定义了 802.11a、 802.11b, 以及 802.1 lg等一系列标准最普通的 WLAN技 术， 随后又陆续出现了其他任务组， 致力于发展涉及现有 802.11技术改进的 规范。 其中， 802.11ah任务组主要制订使用 1GHz 频段以下免许可频段的 WLAN空口标准， 用于支持智能电网及传感器网络等新的网络应用。
无线局域网的基本架构指一个基本服务集（ Basic Service Set,简称 BSS ), 包含一个接入点（ Access Point,简称 AP )以及与 AP相关联的多个站点（ Station, 简称 STA ) 。 802.11 定义了两种操作模式： 分布式协调功能 （Distributed Coordination Function,简称 DCF )和点协调功能 ( Point Coordination Function, 简称 PCF ) , 以及针对这两种操作模式的改进： 增强型分布式协调访问 ( Enhanced Distributed CoordinationAccess , 简称 EDCA )功能和混合协调功 称 HCFCCA )功能。 其中， DCF是最基本的操作模式， 利用带有冲突避免的 载波侦听多路访问 CSMA/CA ( Carrier Sense Multiple Access with Collision Avoidance )机制使多个站点共享无线信道。 EDCA功能是增强型操作模式， 基于 CSMA/CA机制， 支持多个不同优先级队列共享无线信道， 并以传输机 会（ Transmission Opportunity, 简称 TXOP )为单位发送每个优先级队列的数 据。
使用 1GHz以下免许可频段资源时， 能够支持更大范围的通信。 但是， 传输时间就会增大， 并且需要更高的功率消耗， 而站点的电池寿命受限， 并 且更换周期较长， 同时为了减少网络复杂度， 因此在 802.11ah中提出需要支 持最多两跳的中继，即，三层网络架构：根接入点（ Root Access Point, Rt-AP )、 中继、 以及 STA。 框架结构如图 1所示。 中继由两个功能实体组成， 其中第 一功能实体（中继的站点（Relay-STA, R-STA ) )和第二功能实体（ Rt-AP ) 处于同一个 BSS, 即， BSS1 ; 中继的接入点 （Relay- AP, R-AP )和 STA处 于另一个 BSS, 即， BSS2。
为了站点的节能， 减少数据包的传输时延， 让站点尽快地能够将数据尽 快转发或接收， 提出了用于中继的传输机会共享， 如图 2所示。 在中继的传 输机会共享中， 中继对 AP的数据确认时， 有两种确认方法： 显示确认和隐 式确认。 显示确认是指对 AP发送的数据使用一个单独的确认帧进行确认， 如图 2所示； 隐式确认是指对 AP发送的数据使用一个隐含的确认， 这个隐 含的确认包含在中继向 STA发送的数据中， 如图 3所示。 STA通过中继向 AP发上行数据时， 也可釆用相同的方案。
上述方案适用于一帧传输， 但是， 当 AP或 STA竟争到信道后， 有多帧 传输时，当有一帧传输给中继，那么信道的控制权就不在竟争到信道的一方， 而是由中继控制的， 不利于竟争到信道的一方对信道的控制以及后续帧的传 输。 AP或 STA可能会有多帧传输要传输给中继，此时需要对信道进行控制， 这会和中继随意能够控制 AP或 STA竟争到的信道相矛盾。
综上， 现有的传输机会共享机制中， 没有对信道控制权进行有效管理的 方法， 增加了数据传输的时延， 影响了数据传输效率。 发明内容
本发明实施例提供了一种无线局域网中的数据传输方法和系统， 解决了 现有传输机会共享机制影响数据传输效率的问题。
本发明实施例提供了一种无线局域网中的数据传输方法， 包括： 第一站点在获得的传输机会中发送无线帧给第二站点， 并在所述无线帧 中携带对所述第二站点使用所述传输机会与第三站点进行通信的通知信息。 可选地， 所述第一站点为接入点（AP ) , 所述第二站点为中继， 所述第 三站点为站点 （STA ) 。
可选地， 所述第一站点为 STA, 所述第二站点为中继， 所述第三站点为
AP。
可选地， 第一站点在获得的传输机会中发送无线帧给第二站点包括： 所述第一站点在获得的传输机会中发送所述无线帧给所述第二站点的第 一功能实体。
可选地，所述无线帧在物理帧头或媒体访问控制（ Media Access Control, MAC )帧头中携带所述通知信息， 所述通知信息为 1比特或多比特信息位或 信令位； 所述通知信息指示所述第二站点能否使用所述传输机会与所述第三 站点进行通信。
可选地， 在所述通知信息指示允许所述第二站点使用所述传输机会与所 述第三站点进行通信时， 在所述物理帧头或所述 MAC帧头中还携带有所述 第二站点到所述第三站点通信的传输时长限制。
可选地， 所述第二站点到所述第三站点通信的传输时长限制的起始边界 是在所述第一站点传给所述的第二站点的所述无线帧完毕的边界。
可选地， 所述第二站点到所述第三站点通信的传输时长限制的终止边界 是自所述起始边界起叠加所述第二站点到所述第三站点通信的传输时长限制 后指向的边界。
可选地， 所述方法还包括： 在所述通知信息指示允许所述第二站点使用 所述传输机会与所述第三站点进行通信时， 所述第一站点在获得的传输机会 中发送无线帧给第二站点之后，
所述第一站点接收所述第二站点发送的无线帧， 其中， 在所述无线帧中 携带有 1比特或多比特的信息， 所述信息指示所述第二站点接受所述第一站 点的指示使用所述传输机会。
可选地， 所述方法还包括： 所述第一站点接收所述第二站点发送的无线 帧之后，
所述第一站点进入休眠。 可选地， 所述方法还包括： 在所述通知信息指示允许所述第二站点使用 所述传输机会与所述第三站点进行通信时， 所述第一站点在获得的传输机会 中发送无线帧给第二站点之后，
所述第一站点接收所述第二站点发送的无线帧， 其中， 在所述无线帧中 携带有 1比特或多比特的信息， 所述信息指示所述第二站点不接受所述第一 站点的指示使用所述传输机会。
可选地， 所述方法还包括： 所述第一站点接收所述第二站点发送的无线 帧之后，
所述第一站点继续使用所述传输机会或释放所述传输机会。
可选地， 所述方法还包括： 在所述通知信息指示允许所述第二站点使用 所述传输机会与所述第三站点进行通信时， 所述第一站点在获得的传输机会 中发送无线帧给第二站点之后，
所述第二站点在剩余传输机会时间内向所述第三站点发送无线帧，其中， 时间的终止边界落在所述第二站点到所述第三站点通信的传输时限限制的终 止边界之内。
可选地， 在所述第二站点向所述第三站点发送的无线帧的物理帧头或 MAC帧头中预约所述剩余传输机会时间。
可选地， 所述剩余传输机会时间的终止边界落在所述第二站点到所述第 三站点通信的传输时长限制的终止边界之内。
可选地， 所述方法还包括： 所述第二站点在剩余传输机会时间内向所述 第三站点发送无线帧之后，
在全部待向所述第三站点发送的无线帧发送完毕后， 所述第二站点使用 剩余的所述剩余传输机会时间继续向其他站点发送待发送的无线帧。
可选地， 所述方法还包括： 所述第二站点在剩余传输机会时间内向所述 第三站点发送无线帧之后，
在所述第三站点休眠无法接收所述无线帧时， 所述第二站点使用剩余的 所述剩余传输机会时间继续向其他站点发送待发送的无线帧。 可选地， 所述方法还包括： 所述第二站点在剩余传输机会时间内向所述 第三站点发送无线帧之后，
所述第二站点向所述第一站点请求释放传输机会， 请求将所述传输机会 的控制权交回给所述第一站点。
本发明实施例还提供了一种无线局域网中的数据传输方法， 包括： 第二站点接收第一站点在所述第一站点获得的传输机会中发送的无线帧, 其中， 在所述无线帧中携带有对所述第二站点使用所述传输机会与第三站点 进行通信的通知信息。
可选地， 所述第一站点为接入点（AP ) , 所述第二站点为中继， 所述第 三站点为站点 （STA ) 。
可选地， 所述第一站点为 STA, 所述第二站点为中继， 所述第三站点为
AP。
可选地， 所述无线帧在物理帧头或媒体访问控制（MAC )帧头中携带所 述通知信息， 所述通知信息为 1比特或多比特信息位或信令位； 所述通知信 息指示所述第二站点能否使用所述传输机会与所述第三站点进行通信。
可选地， 所述方法还包括： 在所述通知信息指示允许所述第二站点使用 所述传输机会与所述第三站点进行通信时， 所述第二站点接收第一站点在所 述第一站点获得的传输机会中发送的无线帧之后 ,
所述第二站点在随后向所述第一站点发出的无线帧中使用 1比特或多比 特， 指示所述第二站点接受所述第一站点的允许， 并使用所述传输机会向所 述第三站点发送无线帧。
可选地， 所述方法还包括： 在所述通知信息指示允许所述第二站点使用 所述传输机会与所述第三站点进行通信时， 所述第二站点接收第一站点在所 述第一站点获得的传输机会中发送的无线帧之后，
所述第二站点在随后向所述第一站点发出的无线帧中使用 1比特或多比 特， 指示所述第二站点不接受所述第一站点的允许， 由所述第一站点继续使 用所述传输机会。 可选地， 所述方法还包括： 第二站点接收第一站点在所述第一站点获得 的传输机会中发送的无线帧之后，
所述第二站点的第二功能实体向所述第三站点发送无线帧。
本发明实施例还提供了一种无线局域网中的数据传输系统， 包括第一站 点、 第二站点和第三站点， 其中：
所述第一站点设置成：在获得的传输机会中发送无线帧给所述第二站点， 并在所述无线帧中携带对所述第二站点使用所述传输机会与所述第三站点进 行通信的通知信息； 以及
所述第二站点设置成： 接收所述第一站点在所述第一站点获得的传输机 会中发送的无线帧， 其中， 在所述无线帧中携带有对所述第二站点使用所述 传输机会与所述第三站点进行通信的通知信息。
可选地， 所述第一站点为接入点（AP ) , 所述第二站点为中继， 所述第 三站点为站点 （STA ) 。
可选地， 所述第一站点为 STA, 所述第二站点为中继， 所述第三站点为
AP。
可选地， 所述无线帧在物理帧头或媒体访问控制（MAC )帧头中携带所 述通知信息， 所述通知信息为 1比特或多比特信息位或信令位； 所述通知信 息指示所述第二站点能否使用所述传输机会与所述第三站点进行通信。
可选地， 所述第二站点还设置成： 在所述通知信息指示允许所述第二站 点使用所述传输机会与所述第三站点进行通信时， 在随后向所述第一站点发 出的无线帧中使用 1比特或多比特， 指示所述第二站点接受所述第一站点的 允许， 使用所述传输机会向所述第三站点发送无线帧； 以及
所述第一站点还设置成： 接收所述第二站点发送的无线帧， 进入休眠。 可选地， 所述第二站点还设置成： 在所述通知信息指示允许所述第二站 点使用所述传输机会与所述第三站点进行通信时， 在随后向所述第一站点发 出的无线帧中使用 1比特或多比特， 指示所述第二站点不接受所述第一站点 的允许， 不使用所述传输机会向所述第三站点发送无线帧； 以及 所述第一站点还设置成： 接收所述第二站点发送的无线帧， 继续使用所 述传输机会。
釆用本发明实施例提供的一种无线局域网中的数据传输方法和系统， 实 现了第一站点控制下的传输机会控制权管理， 解决了现有传输机会共享机制 影响数据传输效率的问题。 附图概述
图 1为 WLAN中中继的系统示意图；
图 2为中继资源共享的示意图；
图 3为中继资源共享中的隐式确认的示意图；
图 4为接入点获得传输机会共享给中继的帧交换的示意图；
图 5为站点获得传输机会共享给中继的帧交换的示意图；
图 6为在帧头预约传输机会的示意图；
图 7为隐式确认的传输机会共享的示意图；
图 8为传输机会共享后釆用短帧保护信道的示意图；
图 9为传输机会共享后向多站点传输的示意图；
图 10为聚合帧传输共享的示意图；
图 11为包含拒绝传输机会共享的示意图；
图 12为本发明实施例的无线局域网中的数据传输系统的结构示意图。
本发明的较佳实施方式
当 AP或 STA竟争到信道后， 有多帧传输时， 当有一帧传输给中继， 那 么信道的控制权就不在竟争到信道的一方， 而是由中继控制的， 不利于竟争 到信道的一方对信道的控制以及后续帧的传输。
AP 可能会有多帧传输需要对信道进行控制， 此时， 就更需要对传输机 会进行有效控制， 以保证数据传输的稳定性和效率。 为了解决上述问题， 本发明的实施例提供了一种无线局域网中的数据传 输方法和系统， 本发明的实施例提供的技术方案中针对上述问题提供了由发 起数据传输的站点 （如 AP或 STA )控制传输机会的方法， 解决了在多方共 享传输机会时， 传输机会管理的问题， 提高多帧的传输效率并降低数据传输 的时延。 第一站点检测信道， 通过 CSMA/CA机制竟争发送机会。 在检测到 信道空闲并按 CSMA/CA机制可以发送数据时， 向第二站点发送无线帧。 并 在该无线帧中通过 1比特或多比特信息位或信令位来指示是否允许第二站点 共享第一站点获得的传输机会， 如果在无线帧中 1比特或多比特信息位或信 令位指示的含义表示不允许第二站点共享第一站点获得的传输机会， 那么第 二站点根据无线帧的确认策略， 向第一站点发送确认。 第一站点在得到确认 后， 可以继续向该第二站点或其它站点发送数据。
如果在无线帧中 1比特或多比特信息位或信令位指示的含义表示允许第 二站点共享第一站点获得的传输机会， 同时可以指示第二站点和第三站点通 信的总的传输时长限制， 且第二站点收到的第一站点发给本站点的无线帧的 1 比特或多比特信息位或信令位指示的含义为允许本站点共享第一站点获得 的传输机会， 那么第二站点可以根据无线帧的确认策略或隐式确认来对第一 站点发送的无线帧进行确认， 并在对第一站点发送的确认信息中包含第二站 点是否接受第一站点共享的传输机会。
如果第二站点在向第一站点传输的确认中通过信息比特指示为不接受该 第一站点对第二站点使用该传输机会的允许， 那么第二站点在该确认的短帧 间间隔 （Short Inter-Frame Space, SIFS )后不能向第三站点传输数据。 第一 站点在接到第二站点不接受传输机会共享的无线帧后，在 SIFS后可向其它站 点继续发送数据。
如果第二站点在向第一站点传输的确认中通过信息比特指示为接受该第 一站点对第二站点使用该传输机会的允许， 那么第二站点在该确认的 SIFS 后， 就可以向第三站点发送数据， 第二站点和第三站点传输的时长（包括之 前的确认） 不能超过第一站点进行的传输时长限制。 如果第二站点发现第三 站点处于休眠， 那么第二站点在获得的共享传输机会中， 向其它的站点传输 数据。 第一站点在收到第二站点接受传输机会共享的指示后， 可以进入休眠。 如果第二站点在接受第一站点的传输机会共享后， 其向第三站点传输的 数据发送完毕， 则第二站点可以继续使用该共享的传输机会向其它站点发送 数据或将共享的传输机会还给第一站点。
第一站点在收到第二站点还回的共享的传输机会后，可以在 SIFS后向其 它中继或 STA传输数据。
上述的帧交换不能超过第一站点的传输机会限制。
下文中将结合附图对本发明的实施例进行详细说明。 需要说明的是， 在 不冲突的情况下， 本申请中的实施例及实施例中的特征可以相互任意组合。
本发明的实施例的应用场景为无线局域网中三方进行传输机会共享的实 施例， 包括一个 AP、 一个中继， 以及一个 STA, 如图 1所示。 在下述实施 例中， 将对所述第二站点使用所述传输机会与第三站点进行通信的通知信息 用中继传输机会共享域来表示， 通知信息 （中继传输机会共享域）可为 1比 特或多比特信息位或信令位， 该通知信息指示所述第二站点能否使用所述传 输机会与所述第三站点进行通信， 以下以 1比特为例进行说明。
实施例一
本发明实施例中， 以 AP为第一站点、 中继为第二站点、 STA为第三站 点的情况为例进行说明。
如图 4所示， AP有无线帧要通过中继传输给 STA。 AP开始检测信道， 通过 CSMA/CA机制竟争发送机会。 在检测到信道空闲并按 CSMA/CA机制 可以发送数据时， AP 向中继开始传输无线帧， 将该无线帧的中继传输机会 共享域置为 0, 表示还没有进行传输机会共享。 AP向中继的第一功能实体发 送无线帧。
中继收到 AP发送的无线帧后， 检查该无线帧携带的中继传输机会共享 域的值为 0, 中继在 SIFS后对收到的无线帧进行确认 ( Acknowledgement, ACK ) 。 中继在响应 ACK后， 不能在 SIFS后直接向 STA发送无线帧。 AP收到中继的响应后， 在 SIFS后继续向中继传输无线帧， 在无线帧的 物理帧头或 MAC帧头中预约所述第二站点到所述第三站点通信的传输时长 限制 to , 并将该无线帧携带的中继传输机会共享域置为 1 , 表示后续的传输 机会的使用由中继进行控制， 但是中继在后续的传输中， 不能扩展 AP预约 的时间 t0。第二站点到所述第三站点通信的传输时长限制 t0的起始边界是在 所述第一站点传给所述的第二站点的所述无线帧完毕的边界， 终止边界是自 所述起始边界起叠加所述第二站点到所述第三站点通信的传输时长限制 to 后指向的边界。
中继收到 AP的无线帧后， 检查该无线帧携带的中继传输机会共享域的 值为 1 ,中继在 SIFS后可以对收到的无线帧进行显示的确认或隐式的确认（这 里以显示为例） 。 中继在响应 ACK时， 将中继传输机会共享域置为 1或者 将 ACK指示置为 11或者釆用另外的比特， 表示接受 AP的传输机会共享。
中继在响应 ACK后，在 SIFS后直接向 STA发送无线帧，并在该无线帧 的物理帧头或 MAC帧头中预约剩余传输机会时间 tl , tl的时间终止边界不 能超过 t0的时间终止边界， 如图 6所示。 或者中继在响应 ACK后， 在 SIFS 后和 STA先进行信道预约， 如图 8所示，传输请求（Request to Send, RTS ) 帧和清除发送（Clear to Send, CTS )帧或其它帧进行信道预约后， 再进行无 线帧传输。
AP 在收到中继的显示确认或隐式确认的无线帧后， 检查中继是否接受 了本次传输机会共享 （在该无线帧中携带有 1比特或多比特的信息， 该信息 指示所述第二站点是否接受所述第一站点的指示使用所述传输机会） 。 如果 在显示确认或隐式确认中指示了中继接受传输机会共享， 那么 AP可以在剩 余的 TXOP内进入休眠或者等待中继交换传输机会或者释放传输机会。 如果 在显示确认指示了中继不接受传输机会共享，那么 AP在 SIFS后可以向其它 中继或 STA进行数据传输， 如图 11所示。
STA在收到无线帧的 SIFS后向中继发送确认。 中继检查剩余的传输机 会控制时间是否还够进行一次帧交换 ,如果剩余的时间能够进行一次帧交换， 那么中继釆用同样的方式继续向 STA发送无线帧，直到无线帧发送完毕或传 输机会剩余的时间不足以进行一个帧交换。 中继可以使用传输机会终止帧（即，免竟争周期结束（ Contention Free-End, CF-End ) 帧）释放剩余的传输机会， AP在收到中继的传输机会终止帧后， 可以在 SIFS后， 发送传输机会终止帧， 释放传输机会。
中继在接受 AP的传输机会共享后， 也可以将传输机会还给 AP, 釆用的 方式可以是通过向 AP发送无线帧隐式指示或显示指示请求释放传输机会， 将传输机会的控制权交还给所述第一站点 AP。 AP在中继还回传输机会后， 可以在 SIFS后向中继或 STA发送数据。
实施例二
本发明实施例中， 以 STA为第一站点、 中继为第二站点、 AP为第三站 点的情况为例进行说明。
如图 5 所示， STA有多帧要传输给 AP。 STA 开始检测信道， 通过 CSMA/CA机制竟争发送机会。 在检测到信道空闲并按 CSMA/CA机制可以 发送数据时， STA向中继开始传输数据（无线帧） ， 并将该无线帧的物理帧 头或 MAC帧头携带的中继传输机会共享域置为 0, 表示还没有向中继进行 传输机会共享。 STA向中继的第一功能实体发送无线帧。
中继收到 STA的数据后，检查中继传输机会共享域的值为 0,中继在 SIFS 后对收到的数据进行 ACK。 中继在响应 ACK后， 不能在 SIFS后直接向 AP 发送数据。
STA收到中继的响应后， 在 SIFS后向中继传输无线帧， 在无线帧的物 理帧头或 MAC帧头中预约第二站点到所述第三站点通信的传输时长限制 t0， 并将该无线帧携带的中继传输机会共享域置为 1 , 表示后续的传输机会的使 用由中继进行控制，但是中继在后续的传输中，不能扩展 STA预约的时间 t0。 第二站点到所述第三站点通信的传输时长限制 to 的起始边界是在所述第一 站点传给所述的第二站点的所述无线帧完毕的边界， 终止边界是自所述起始 边界起叠加所述第二站点到所述第三站点通信的传输时长限制 to 后指向的 边界。
中继收到 STA的数据（无线帧）后，检查中继传输机会共享域的值为 1 , 中继在 SIFS后对收到的数据进行确认。可以对无线帧进行显示确认或隐式确 认（这里以显示为例）。 中继在响应 ACK时， 将中继传输机会共享域置为 1 或者将 ACK指示置为 11或者釆用另外的比特，表示接收 STA的传输机会共 享。
中继在响应 ACK后， 在 SIFS后直接向 AP发送数据。
AP在收到数据的 SIFS后向中继发送 ACK响应。 中继检查剩余的传输 机会使用时间是否还够进行一次帧交换， 如果剩余的时间能够进行一次帧交 换， 那么中继釆用同样的方式继续向 AP发送数据， 直到数据发送完毕或传 输机会剩余的时间不足以进行一个帧交换。
STA在收到中继的显示确认或隐式确认后， 检查中继是否接受本次传输 机会共享。 如果在显示确认或隐式确认中指示中继接受传输机会共享， 那么 STA可以进入休眠。 如果在显示确认指示了中继不接受传输机会共享， 那么 STA可以继续向中继传输数据或释放本次传输机会或进入休眠。
实施例三
本发明实施例中， 以 AP为第一站点、 中继为第二站点、 STA为第三站 点为例进行说明。
如图 7 所示， AP 有无线帧传输给 STA 。 AP 开始检测信道， 通过 CSMA/CA机制竟争发送机会。 在检测到信道空闲并按 CSMA/CA机制可以 发送数据时， AP 向中继开始传输数据（无线帧） ， 将无线帧的物理帧头或 MAC帧头携带的中继传输机会共享域置为 0,表示还没有进行传输机会共享。
AP向中继的第一功能实体发送无线帧。
中继收到 AP的数据后，检查中继传输机会共享域的值为 0,中继在 SIFS 后对收到的数据进行 ACK。中继在响应 ACK后，不能在 SIFS后直接向 STA 发送数据。
AP收到中继的响应后， 在 SIFS后继续进行向中继传输数据， 并将数据 的中继传输机会共享域置为 1 ,表示后续的传输机会的使用由中继进行控制。
中继收到 AP的数据后，检查中继传输机会共享域的值为 1 ,中继在 SIFS 后对收到的数据进行确认。 可以对无线帧进行显示确认或隐式确认（这里以 隐式为例） 。
中继在向 STA发送无线帧时，将中继传输机会共享域置为 1或者将 ACK 指示置为 11或者釆用另外的比特， 表示中继接收 AP的传输机会共享。
STA在收到数据的 SIFS后向中继发送 ACK响应。中继检查剩余的时间 是否还够进行一次帧交换， 如果剩余的时间能够进行一次帧交换， 那么中继 釆用同样的方式继续向 STA发送数据，直到数据发送完毕或传输机会剩余的 时间不足以进行一个帧交换。
AP在收到中继的隐式确认后，检查中继是否接受了本次传输机会共享。 如果在隐式确认中指示了中继接受传输机会共享， 那么 AP等待中继还回传 输机会， 或者重新竟争信道。 如果在隐式确认指示了中继不接受传输机会共 中继在接受 AP的传输机会共享后， 也可以将传输机会还给 AP, 釆用的 方式可以是通过向 AP发送无线帧隐式指示或显示指示交还传输机会。 AP在 中继还回传输机会后， 可以在 SIFS后向中继或 STA发送数据。
实施例四
本发明实施例中， 以 AP为第一站点、 中继为第二站点、 STA A为第三 站点的情况为例进行说明。
如图 9所示，ΑΡ有无线帧要通过中继发送给 STA A, AP开始检测信道， 通过 CSMA/CA机制竟争发送机会。 在检测到信道空闲并按 CSMA/CA机制 可以发送数据时， AP向中继开始传输无线帧，在无线帧中预约中继和 STA A 通信的传输时长限制 t0。 AP 向中继的第一功能实体发送无线帧。 所述中继 到所述 STA A通信的传输时长限制 t0的起始边界是在该无线帧传输完毕的 边界； t0的终止边界是自所述起始边界起叠加 t0后指向的边界。 中继和 STA A通信不能超过 t0的终止边界。
并将该无线帧的物理帧头或 MAC帧头携带的中继传输机会共享域置为 1 , 表示允许中继在收到该无线帧后获得信道的控制权。 当中继收到 AP的无线帧后， 检查该无线帧携带的中继传输机会共享域 的值为 1 , 中继在 SIFS后可以对收到的无线帧进行显示的确认或隐式的确认 (这里以显示为例） 。 中继在响应 ACK 时， 将中继传输机会共享域置为 1 或者将 ACK指示置为 11或者釆用另外的比特， 表示接收 AP的传输机会共 享。
中继在收到无线帧的 SIFS后响应 ACK,如果中继发现 STA A处于休眠 状态， 那么中继可以在 ACK后的 SIFS后向另外一个站点 STA B发送数据。
如果中继给 STA B的无线帧发送完毕后， 还有剩余的传输机会， 可以向 其它站点继续传输， 直到能传的无线帧发送完毕或传输机会剩余的时间不足 以进行一个帧交换为止。
此外， 中继在获得 AP通过中继传输机会共享域获得的传输机会后， 如 果中继可以在任何时候， 向 AP发送一个无线帧释放获得的传输机会， 则可 以通过无线帧隐式或显示的指示释放传输机会 , AP重新获得对信道的控制。
AP 在收到中继的显示确认或隐式确认后， 检查中继是否接受了本次传 输机会共享。 如果在显示确认或隐式确认中指示了中继接受传输机会共享， 那么 AP等待中继还回传输机会， 或者重新竟争信道。 如果在显示确认指示 了中继不接受传输机会共享， 那么 AP在 SIFS后可以向其它中继或 STA进 行传输。
实施例五
本发明实施例中， 以 AP为第一站点、 中继为第二站点、 STA A为第三 站点的情况为例进行说明。
如图 10所示， AP有一个无线帧要通过中继传输给 STA A,该无线帧（该 帧釆用了聚合技术， 在 MAC层或物理（PHY )层将多个单播帧聚合在一个 无线帧中 ) 中包含了 STA A和 STA B 两个目标站点的单播数据。 通过 CSMA/CA机制竟争发送机会。 在检测到信道空闲并按 CSMA/CA机制可以 发送数据时， AP向中继开始传输无线帧， 在无线帧中预约中继和 STA A通 信的传输时长限制 t0。 AP 向中继的第一功能实体发送无线帧。 所述中继到 所述 STA A通信的传输时长限制 t0的起始边界是在该无线帧传输完毕的边 界； t0的终止边界是自所述起始边界起叠加 t0后指向的边界。 中继和 STA 通信不能超过 to的终止边界。
中继在对无线帧进行确认响应后，会在 SIFS后，向 STA A发送无线帧， STA A在收到中继发给自己的无线帧后， 根据确认策略在 SIFS后对无线帧 进行确认， 中继在收到 STA A的确认后， 如果剩余传输机会的时间能够进行 一次帧交换， 那么中继釆用同样的方式继续向 STA B 发送数据， 直到中继
实施例六
如图 12所示， 本发明实施例提供了一种无线局域网中的数据传输系统， 包括：
第一站点 121、 第二站点 122和第三站点 123 , 其中：
所述第一站点 121用于：在获得的传输机会中发送无线帧给第二站点 122, 并在所述无线帧中携带对所述第二站点 122 使用所述传输机会与第三站点 123进行通信的通知信息； 以及
所述第二站点 122用于： 接收所述第一站点 121在该第一站点 121获得 的传输机会中发送的无线帧， 其中， 在所述无线帧中携带有对所述第二站点 122使用所述传输机会与所述第三站点 123进行通信的通知信息。
可选地， 所述第一站点 121为 AP, 所述第二站点 122为中继， 所述第 三站点 123为 STA。
可选地， 所述第一站点 121为 STA, 所述第二站点 122为中继， 所述第 三站点 123为 AP。
可选地， 所述无线帧在物理帧头或 MAC帧头中携带所述通知信息， 所 述通知信息为 1比特或多比特信息位或信令位； 所述通知信息指示所述第二 站点 122能否使用所述传输机会与所述第三站点 123进行通信。
可选地， 所述第二站点 122还用于： 在所述通知信息指示允许所述第二 站点 122使用所述传输机会与所述第三站点 123进行通信时， 在随后向所述 第一站点 121发出的无线帧中使用 1比特或多比特， 指示所述第二站点 122 接受所述第一站点 121的允许， 使用所述传输机会向所述第三站点 123发送 无线帧； 以及
所述第一站点 121还用于： 接收所述第二站点 122发送的无线帧， 进入 休眠。
可选地， 所述第二站点 122还用于： 在所述通知信息指示允许所述第二 站点 122使用所述传输机会与所述第三站点 123进行通信时， 在随后向所述 第一站点 121发出的无线帧中使用 1比特或多比特， 指示所述第二站点 122 不接受所述第一站点 121的允许， 不使用所述传输机会向所述第三站点 123 发送无线帧； 以及
所述第一站点 121还用于： 接收所述第二站点 122发送的无线帧， 继续 使用所述传输机会。
可选地， 在所述通知信息指示允许所述第二站点 122使用所述传输机会 与所述第三站点 123进行通信时， 在所述物理帧头或 MAC帧头中还携带有 所述第二站点 122到所述第三站点 123通信的传输时长限制。
可选地， 所述第二站点 122到所述第三站点 123通信的传输时长限制的 起始边界是在所述第一站点 121传给所述的第二站点 122的所述无线帧完毕 的边界。
可选地， 所述第二站点 122到所述第三站点 123通信的传输时长限制的 终止边界是自所述起始边界起叠加所述第二站点 122到所述第三站 123点通 信的传输时长限制后指向的边界。
可选地， 所述第二站点 122还用于： 向所述第三站点 123发送无线帧， 并在所述无线帧的物理帧头或 MAC帧头中预约剩余传输机会时间， 其中， 点 123禁止继续中继； 以及
所述第三站点 123用于： 接收所述第二站点 122发送的所述无线帧。 可选地， 所述第三站点 123是用于接收所述第二站点 122的第二功能实 体发送的无线帧。 可选地， 所述剩余传输机会时间的终止边界落在所述第二站点 122到所 述第三站点 123通信的传输时长限制的终止边界之内。
可选地， 所述第二站点 122还用于： 在全部待向所述第三站点 123发送 送待发送的无线帧。
可选地， 所述第二站点 122还用于： 在所述第三站点 123休眠无法接收 所述无线帧时， 使用剩余的所述剩余传输机会时间继续向其他站点发送待发 送的无线帧。
可选地，所述第二站点还用于：向所述第一站点 121请求释放传输机会， 请求将所述传输机会的控制权交回给所述第一站点 121。
可选地， 所述无线帧包含所述第三站点 123和一个或多个其他站点的单 播数据；
所述第二站点 122还用于： 在全部待向所述第三站点 123发送的无线帧 发送完毕后， 使用剩余的剩余传输机会时间， 向所述一个或多个其他站点发 送单播数据。
可选地， 所述无线帧包含所述第三站点 123和一个或多个其他站点的单 播数据；
所述第二站点 122还用于： 在所述第三站点 123无法接收无线帧时， 使 用剩余的剩余传输机会时间， 向所述一个或多个其他站点发送单播数据。
可选地， 所述第二站点 122还用于： 在所述通知信息指示所述第二站点
122不得使用所述传输机会与所述第三站点 123进行通信时， 继续等待接收 所述第一站点 121发送的后续无线帧或竟争信道。
釆用本发明的实施例提供的一种无线局域网中的数据传输方法和系统， 第一站点在获得的传输机会中发送无线帧给第二站点， 并在所述无线帧中携 带对所述第二站点使用所述传输机会与第三站点进行通信的通知信息， 实现 了第一站点控制下的传输机会控制权管理， 解决了现有传输机会共享机制影 响数据传输效率的问题。 在 AP向 STA发送数据的过程中， 由 AP对中继的传输机会控制进行授 权； 在 STA向 AP发送数据的过程中， 由 STA对中继的传输机会控制进行 授权。 由传输机会的竟争成功者对传输机会的使用进行控制和管理， 更能满 足数据传输的需要。
本领域普通技术人员可以理解上述实施例的全部或部分步骤可以使用计 算机程序流程来实现，所述计算机程序可以存储于一计算机可读存储介质中， 所述计算机程序在相应的硬件平台上 （如， 系统、 设备、 装置、 器件等）执 行， 在执行时， 包括方法实施例的步骤之一或其组合。
可选地， 上述实施例的全部或部分步骤也可以使用集成电路来实现， 这 些步骤可以被分别制作成一个个集成电路模块， 或者将它们中的多个模块或 步骤制作成单个集成电路模块来实现。 这样， 本发明实施例不限制于任何特 定的硬件和软件结合。
上述实施例中的各装置 /功能模块 /功能单元可以釆用通用的计算装置来 实现， 它们可以集中在单个的计算装置上， 也可以分布在多个计算装置所组 成的网络上。
上述实施例中的各装置 /功能模块 /功能单元以软件功能模块的形式实现 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。 上述提到的计算机可读取存储介质可以是只读存储器、 磁盘或光盘等。
任何熟悉本技术领域的技术人员在本发明揭露的技术范围内， 可轻易想 到变化或替换， 这些变化和替换都应涵盖在本发明的保护范围之内。 因此， 本发明的保护范围应以权利要求所述的保护范围为准。
工业实用性
釆用本发明实施例提供的方法和系统， 实现了第一站点控制下的传输机 会控制权管理， 解决了现有传输机会共享机制影响数据传输效率的问题。

Claims

权利要求书
1、 一种无线局域网中的数据传输方法， 包括：
第一站点在获得的传输机会中发送无线帧给第二站点， 并在所述无线帧 中携带对所述第二站点使用所述传输机会与第三站点进行通信的通知信息。
2、 根据权利要求 1所述的方法， 其中，
所述第一站点为接入点（AP ) , 所述第二站点为中继， 所述第三站点为 站点 （STA ) 。
3、 根据权利要求 1所述的方法， 其中，
所述第一站点为 STA, 所述第二站点为中继， 所述第三站点为 AP。
4、根据权利要求 1所述的方法， 其中， 第一站点在获得的传输机会中发 送无线帧给第二站点包括：
所述第一站点在获得的传输机会中发送所述无线帧给所述第二站点的第 一功能实体。
5、 根据权利要求 2或 3所述的方法， 其中，
所述无线帧在物理帧头或媒体访问控制（MAC )帧头中携带所述通知信 息， 所述通知信息为 1比特或多比特信息位或信令位； 所述通知信息指示所 述第二站点能否使用所述传输机会与所述第三站点进行通信。
6、 根据权利要求 5所述的方法， 其中，
在所述通知信息指示允许所述第二站点使用所述传输机会与所述第三站 点进行通信时， 在所述物理帧头或所述 MAC帧头中还携带有所述第二站点 到所述第三站点通信的传输时长限制。
7、 根据权利要求 6所述的方法， 其中，
所述第二站点到所述第三站点通信的传输时长限制的起始边界是在所述 第一站点传给所述的第二站点的所述无线帧完毕的边界。
8、 根据权利要求 6所述的方法， 其中，
所述第二站点到所述第三站点通信的传输时长限制的终止边界是自所述 起始边界起叠加所述第二站点到所述第三站点通信的传输时长限制后指向的 边界。
9、根据权利要求 5所述的方法，还包括： 在所述通知信息指示允许所述 第二站点使用所述传输机会与所述第三站点进行通信时， 所述第一站点在获 得的传输机会中发送无线帧给第二站点之后，
所述第一站点接收所述第二站点发送的无线帧， 其中， 在所述无线帧中 携带有 1比特或多比特的信息， 所述信息指示所述第二站点接受所述第一站 点的指示使用所述传输机会。
10、 根据权利要求 9所述的方法， 还包括： 所述第一站点接收所述第二 站点发送的无线帧之后，
所述第一站点进入休眠。
11、 根据权利要求 5所述的方法， 还包括： ， 在所述通知信息指示允许 所述第二站点使用所述传输机会与所述第三站点进行通信时， 所述第一站点 在获得的传输机会中发送无线帧给第二站点之后，
所述第一站点接收所述第二站点发送的无线帧， 其中， 在所述无线帧中 携带有 1比特或多比特的信息， 所述信息指示所述第二站点不接受所述第一 站点的指示使用所述传输机会。
12、根据权利要求 11所述的方法，还包括： 所述第一站点接收所述第二 站点发送的无线帧之后，
所述第一站点继续使用所述传输机会或释放所述传输机会。
13、 根据权利要求 5所述的方法， 还包括： 在所述通知信息指示允许所 述第二站点使用所述传输机会与所述第三站点进行通信时， 所述第一站点在 获得的传输机会中发送无线帧给第二站点之后，
所述第二站点在剩余传输机会时间内向所述第三站点发送无线帧，其中， 时间的终止边界落在所述第二站点到所述第三站点通信的传输时限限制的终 止边界之内。
14、 根据权利要求 13所述的方法， 其中，
在所述第二站点向所述第三站点发送的无线帧的物理帧头或 MAC帧头 中预约所述剩余传输机会时间。
15、 根据权利要求 13所述的方法， 其中，
所述剩余传输机会时间的终止边界落在所述第二站点到所述第三站点通 信的传输时长限制的终止边界之内。
16、根据权利要求 13所述的方法，还包括： 所述第二站点在剩余传输机 会时间内向所述第三站点发送无线帧之后，
在全部待向所述第三站点发送的无线帧发送完毕后， 所述第二站点使用 剩余的所述剩余传输机会时间继续向其他站点发送待发送的无线帧。
17、根据权利要求 13所述的方法，还包括： 所述第二站点在剩余传输机 会时间内向所述第三站点发送无线帧之后，
在所述第三站点休眠无法接收所述无线帧时， 所述第二站点使用剩余的 所述剩余传输机会时间继续向其他站点发送待发送的无线帧。
18、根据权利要求 13所述的方法，还包括： 所述第二站点在剩余传输机 会时间内向所述第三站点发送无线帧之后，
所述第二站点向所述第一站点请求释放传输机会， 请求将所述传输机会 的控制权交回给所述第一站点。
19、 一种无线局域网中的数据传输方法， 包括：
第二站点接收第一站点在所述第一站点获得的传输机会中发送的无线帧, 其中， 在所述无线帧中携带有对所述第二站点使用所述传输机会与第三站点 进行通信的通知信息。
20、 根据权利要求 19所述的方法， 其中，
所述第一站点为接入点（AP ) , 所述第二站点为中继， 所述第三站点为 站点 （STA ) 。
21、 根据权利要求 19所述的方法， 其中，
所述第一站点为 STA, 所述第二站点为中继， 所述第三站点为 AP。
22、 根据权利要求 20或 21所述的方法， 其中，
所述无线帧在物理帧头或媒体访问控制（MAC )帧头中携带所述通知信 息， 所述通知信息为 1比特或多比特信息位或信令位； 所述通知信息指示所 述第二站点能否使用所述传输机会与所述第三站点进行通信。
23、根据权利要求 22所述的方法，还包括： 在所述通知信息指示允许所 述第二站点使用所述传输机会与所述第三站点进行通信时， 所述第二站点接 收第一站点在所述第一站点获得的传输机会中发送的无线帧之后，
所述第二站点在随后向所述第一站点发出的无线帧中使用 1比特或多比 特， 指示所述第二站点接受所述第一站点的允许， 并使用所述传输机会向所 述第三站点发送无线帧。
24、根据权利要求 22所述的方法，还包括： 在所述通知信息指示允许所 述第二站点使用所述传输机会与所述第三站点进行通信时， 所述第二站点接 收第一站点在所述第一站点获得的传输机会中发送的无线帧之后，
所述第二站点在随后向所述第一站点发出的无线帧中使用 1比特或多比 特， 指示所述第二站点不接受所述第一站点的允许， 由所述第一站点继续使 用所述传输机会。
25、根据权利要求 23所述的方法，还包括： 第二站点接收第一站点在所 述第一站点获得的传输机会中发送的无线帧之后 ,
所述第二站点的第二功能实体向所述第三站点发送无线帧。
26、 一种无线局域网中的数据传输系统， 包括： 第一站点、 第二站点和 第三站点， 其中：
所述第一站点设置成：在获得的传输机会中发送无线帧给所述第二站点， 并在所述无线帧中携带对所述第二站点使用所述传输机会与所述第三站点进 行通信的通知信息； 以及
所述第二站点设置成： 接收所述第一站点在所示第一站点获得的传输机 会中发送的无线帧， 其中， 在所述无线帧中携带有对所述第二站点使用所述 传输机会与所述第三站点进行通信的通知信息。
27、 根据权利要求 26所述的系统， 其中，
所述第一站点为接入点（AP ) , 所述第二站点为中继， 所述第三站点为 站点 （STA ) 。
28、 根据权利要求 26所述的系统， 其中，
所述第一站点为 STA, 所述第二站点为中继， 所述第三站点为 AP。
29、 根据权利要求 27或 28所述的系统， 其中，
所述无线帧在物理帧头或媒体访问控制（MAC )帧头中携带所述通知信 息， 所述通知信息为 1比特或多比特信息位或信令位； 所述通知信息指示所 述第二站点能否使用所述传输机会与所述第三站点进行通信。
30、 根据权利要求 29所述的系统， 其中，
所述第二站点还设置成： 在所述通知信息指示允许所述第二站点使用所 述传输机会与所述第三站点进行通信时， 在随后向所述第一站点发出的无线 帧中使用 1比特或多比特， 指示所述第二站点接受所述第一站点的允许， 使 用所述传输机会向所述第三站点发送无线帧； 以及
所述第一站点还设置成： 接收所述第二站点发送的无线帧， 进入休眠。
31、 根据权利要求 29所述的系统， 其中，
所述第二站点还设置成： 在所述通知信息指示允许所述第二站点使用所 述传输机会与所述第三站点进行通信时， 在随后向所述第一站点发出的无线 帧中使用 1比特或多比特， 指示所述第二站点不接受所述第一站点的允许， 不使用所述传输机会向所述第三站点发送无线帧； 以及
所述第一站点还设置成： 接收所述第二站点发送的无线帧， 继续使用所 述传输机会。
PCT/CN2013/091031 2013-03-11 2013-12-31 无线局域网中的数据传输方法和系统 Ceased WO2014139314A1 (zh)

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Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104202822A (zh) * 2014-04-30 2014-12-10 中兴通讯股份有限公司 一种信道接入方法、系统以及站点
US20160270130A1 (en) * 2015-03-15 2016-09-15 Htc Corporation Wireless network system and method for establishing the same
CN109479324B (zh) * 2015-05-01 2022-09-06 恩智浦美国有限公司 无线局域网(wlan)中的传输机会所有权转移和延长
CN107787018B (zh) * 2016-08-26 2020-05-08 华为技术有限公司 通信方法、设备及系统
CN109673028A (zh) * 2017-10-17 2019-04-23 华为技术有限公司 一种多小区协作方法、接入点及站点
CN109996335B (zh) * 2017-12-29 2022-02-11 华为技术有限公司 一种传输时间处理方法及相关设备
CN110855627B (zh) * 2019-01-16 2021-04-09 星环信息科技(上海)股份有限公司 应用部署方法、装置、设备及介质
US11968712B2 (en) 2020-04-06 2024-04-23 Mediatek Inc. Shared wireless fidelity communication device for controlling operations of station during shared period that is part of time period of transmission opportunity obtained by sharing access point
US11337222B2 (en) * 2020-06-24 2022-05-17 Sony Group Corporation Coordinated stations in a single BSS with shared TXOP in the frequency domain
US11405944B2 (en) * 2020-06-24 2022-08-02 Sony Group Corporation Coordinated stations in OBSS with shared TXOP in the frequency domain
WO2024186023A1 (ko) * 2023-03-03 2024-09-12 엘지전자 주식회사 무선랜 시스템에서 특정 시구간 내에서 릴레이 전송을 수행하는 방법 및 장치
WO2025144880A1 (en) * 2023-12-29 2025-07-03 Ofinno, Llc Sounding operation for relay communication

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101313608A (zh) * 2005-03-18 2008-11-26 阿尔构网络股份有限公司 高效无线传输机会越区切换
CN101433022A (zh) * 2006-04-24 2009-05-13 交互数字技术公司 用于无线网格网络中的传输时机使用的方法和信令过程
EP2299768A1 (en) * 2009-09-18 2011-03-23 Electronics and Telecommunications Research Institute Data transmission apparatus and method in wireless communication system

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4398886B2 (ja) 2005-03-07 2010-01-13 ソニー株式会社 通信端末装置、通信システム、通信方法、およびプログラム
US20080045145A1 (en) * 2006-08-17 2008-02-21 Fujitsu Limited Radio Relay Communication Method, Radio Base Station, and Radio Relay Station in Radio Communication System
EP2157810A1 (en) * 2007-05-01 2010-02-24 NTT DoCoMo, Inc. Reception cycle control method, radio base station, and mobile station
JP2011009850A (ja) 2009-06-23 2011-01-13 Hitachi Kokusai Electric Inc 無線通信システム
US8804601B2 (en) * 2009-08-05 2014-08-12 Panasonic Intellectual Property Corporation Of America Wireless communication device, signal relay method, and signal allocation method
US9049678B2 (en) * 2010-05-26 2015-06-02 Centre Of Excellence In Wireless Technology Indoor personal relay
SG11201501898PA (en) 2012-09-12 2015-04-29 Agency Science Tech & Res Communication methods and communication devices
US10091688B2 (en) * 2012-12-07 2018-10-02 Futurewei Technologies, Inc. Systems and methods for packet relaying

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101313608A (zh) * 2005-03-18 2008-11-26 阿尔构网络股份有限公司 高效无线传输机会越区切换
CN101433022A (zh) * 2006-04-24 2009-05-13 交互数字技术公司 用于无线网格网络中的传输时机使用的方法和信令过程
EP2299768A1 (en) * 2009-09-18 2011-03-23 Electronics and Telecommunications Research Institute Data transmission apparatus and method in wireless communication system

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