WO2013177972A1 - 一种数据发送、转发方法、装置和系统 - Google Patents

一种数据发送、转发方法、装置和系统 Download PDF

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Publication number
WO2013177972A1
WO2013177972A1 PCT/CN2013/073237 CN2013073237W WO2013177972A1 WO 2013177972 A1 WO2013177972 A1 WO 2013177972A1 CN 2013073237 W CN2013073237 W CN 2013073237W WO 2013177972 A1 WO2013177972 A1 WO 2013177972A1
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WO
WIPO (PCT)
Prior art keywords
data frame
relay
relay point
point
information bit
Prior art date
Application number
PCT/CN2013/073237
Other languages
English (en)
French (fr)
Inventor
周子铨
杨讯
杨绿溪
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP13797659.3A priority Critical patent/EP2846585B1/en
Priority to KR1020147035793A priority patent/KR101644867B1/ko
Priority to BR112014029407-0A priority patent/BR112014029407B1/pt
Publication of WO2013177972A1 publication Critical patent/WO2013177972A1/zh
Priority to US14/553,490 priority patent/US9510267B2/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W40/00Communication routing or communication path finding
    • H04W40/02Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/22Communication route or path selection, e.g. power-based or shortest path routing using selective relaying for reaching a BTS [Base Transceiver Station] or an access point
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/14Relay systems
    • H04B7/15Active relay systems
    • H04B7/155Ground-based stations
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W40/00Communication routing or communication path finding
    • H04W40/02Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/04Communication route or path selection, e.g. power-based or shortest path routing based on wireless node resources
    • H04W40/10Communication route or path selection, e.g. power-based or shortest path routing based on wireless node resources based on available power or energy
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access
    • H04W74/08Non-scheduled access, e.g. ALOHA
    • H04W74/0808Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
    • H04W74/0816Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA] with collision avoidance
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W88/00Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02Terminal devices
    • H04W88/04Terminal devices adapted for relaying to or from another terminal or user
    • 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

  • the present invention relates to the field of communications, and in particular, to a data transmission and forwarding method, apparatus, and system.
  • BSS basic service set
  • AP Access Point
  • the prior art provides a process for assigning a relay (Relay) to a station that needs to be relayed.
  • the solution is to set up a fixed Relay for a relay site, and then the data sent by the site is forwarded through the Relay.
  • connection process between the site and Relay is given in the prior art, and there is no communication process after the site and Relay are connected. Moreover, the prior art sets a fixed Relay solution. When the Relay site moves, the network topology changes, and then another Relay site needs to be assigned to the station (Station, STA). When the network topology changes rapidly, existing solutions need to establish connections repeatedly, which is inefficient. Summary of the invention
  • Embodiments of the present invention provide a method, an apparatus, and a system for data transmission and forwarding, to solve a communication problem between a station and a terminal with limited power.
  • An embodiment of the present invention provides a data sending method of a terminal, including: sending a data frame to a relay point, where the data frame includes a relay information bit, where the relay information bit is used to identify whether it is needed Transmitting, by the relay point, the data frame, if the relay information bit indicates that the relay point needs to forward the data frame, the data frame is forwarded by the relay point to an access point; A response message of the access point, the response message is used to indicate that the data frame is correctly received by the access point.
  • An embodiment of the present invention provides a data forwarding method for a relay point, including: receiving a data frame sent by a terminal, where the data frame includes a relay information bit, where the relay information bit is used to identify whether the relay is needed. The point forwards the data frame; if the relay information bit indicates that relay point forwarding is required, the data frame is sent to the access point.
  • the embodiment of the present invention provides a data sending terminal, where the terminal includes: a sending module and a receiving module; the sending module is configured to send a data frame to a relay point, where the data frame includes a relay information bit, The relay information bit is used to identify whether the relay point needs to forward the data frame, and if the relay information bit indicates that the relay point needs to forward the data frame, the data frame is used by the relay point. Forwarding to the access point; the receiving module is configured to receive a response message of the access point, where the response message is used to indicate that the data frame is correctly received by the access point.
  • the embodiment of the present invention provides a relay point for data forwarding, where the relay point includes: a receiving module and a sending module, where the receiving module is configured to receive a data frame sent by the terminal, where the data frame includes a relay information bit.
  • the relay information bit is used to identify whether the relay point needs to forward the data frame; the sending module is configured to send the data frame to an access point if the relay information bit indicates that relay point forwarding is needed. .
  • the method and device for transmitting and forwarding data provide a method for information exchange between a terminal and an access point in a case where the terminal power is limited, so that the data sent by the power limited terminal reaches the access point.
  • FIG. 1 is a flowchart of an embodiment of a data sending method of a terminal according to the present invention
  • FIG. 2 is a flowchart of still another embodiment of a data sending method of a terminal according to the present invention.
  • FIG. 4 is a flowchart of still another embodiment of a data sending method of a terminal according to the present invention.
  • FIG. 5 is a flowchart of an embodiment of a data forwarding method of a relay point according to the present invention.
  • FIG. 6 is a flowchart of still another embodiment of a data forwarding method of a relay point according to the present invention.
  • FIG. 7 is a structural diagram of an embodiment of a data transmitting terminal according to the present invention.
  • FIG. 8 is a structural diagram of an embodiment of a data transmitting terminal according to the present invention.
  • FIG. 9 is a structural diagram of an embodiment of a relay point for data forwarding according to the present invention.
  • FIG. 10 is a structural diagram of another embodiment of a relay point for data forwarding according to the present invention.
  • FIG. 1 provides a flowchart of an embodiment of the present invention.
  • the method includes: S101: sending a data frame to a relay point, where the data frame includes a relay information bit, where the relay information bit is used to identify whether the relay point needs to forward the data frame, if The relay information bit indicates that the relay point needs to forward the data frame, and the data frame is forwarded by the relay point to the access point; S103 receives the response message of the access point, and the response message is used by It is indicated that the data frame is correctly received by the access point.
  • the data frame is discarded by the relay point.
  • Figure 2 provides a flow chart of one embodiment of the present invention.
  • the method further includes: S100 interacting with the relay point to select a relay point with the best quality; and the sending the data frame to the relay point includes: The selected relay point sends a data frame.
  • the data frame further includes a relay point address information bit, where the relay point address information bit is used to carry address information of the selected relay point; and the S 103 sends data to the selected relay point.
  • the frame includes: transmitting, to the selected relay point, a data frame including the relay point address information bit, so that if the relay point address information bit information is consistent with the address information of the selected relay point, The data frame is forwarded by the selected relay point to the access point.
  • FIG. 3 provides a structure of a frame control header of a data frame in one embodiment of the present invention.
  • the meaning of the address 3 field is redefined in the frame control header of the data frame, and the address 3 is used to carry the identifier of the Re 1 ay station, which may be the MAC address of the Re 1 a y site.
  • Address 1 and Address 2 represent the address information of the transmitting terminal of the data frame and the target access point of the data frame, respectively.
  • the Relay site Since the Relay site knows which site to link to when re-linking Relay, this information is also reported to the AP. Therefore, the Relay site can determine whether the site is pre-linked by the site address that requires Relay. The AP can also know which Relay site the frame is forwarded through, so the address 3 may not carry the information of the Relay site. At this point, you only need to add a bit to the frame control indicating that Relay is required.
  • Figure 4 provides a flow chart of one embodiment of the present invention.
  • the sending, by the S101, the data frame to the relay point includes: sending the number to the relay point by broadcasting According to the frame.
  • This embodiment provides a data sending method that does not pre-select a forwarding relay point. When the network topology changes rapidly, the solution does not need to repeatedly select a relay point, and the efficiency is higher.
  • the method further includes: if the response message of the access point is not received within the first duration, to the middle The data frame is retransmitted by the point, and the first duration is obtained according to twice the short frame interval duration, the slot duration, the data frame transmission duration, and the receiver initiated delay duration.
  • ACKTimeout Interva l aSIFSTime*2 + aSlotTime+ aPPDUt ime + aPHY-RX- START- Delay.
  • the ACKTimeout Interva l is used to indicate the first duration, and the aSIFSTime is the duration of a Short Inter-frame Space (SIFS); aS lotTime is the length of a slot defined in the 802.11 protocol, indicating Propagation delay; aPPDUt ime indicates the transmission duration of the data frame; aPHY-RX-START-Delay indicates the delay time of the receiver startup.
  • the relay station forwards the frame, the network allocation vector (NAV) of the surrounding site is set, and the NAV indicates that another relay point other than the data frame relay point is sent, and then the relay point is sent. After the data frame is described, the data frame is sent for a waiting time.
  • NAV network allocation vector
  • Relay bi t indicates that a relay point needs to forward a data frame
  • a surrounding station that is not a Relay station
  • NAV SIFS + ACK + SIFS + aPPDUt ime
  • SIFS represents a short frame spacing (Shor t Inter-frame Space, The duration of SIFS)
  • ACK represents the first duration
  • transmission duration of the data frame indicated by aPPDUt ime the transmission duration of the data frame indicated by aPPDUt ime.
  • the method further includes: receiving the data frame forwarded by the relay point, if the relay point forwards The data frame is incorrect, and the data frame is resent to the relay point.
  • FIG. 5 provides a flowchart of an embodiment of the present invention.
  • the method includes: S501: receiving a data frame sent by the terminal, where the data frame includes a relay information bit, where the relay information bit is used to identify whether the relay is needed Point forwarding the data frame; S503: if the relay information bit indicates that relay point forwarding is required, the data frame is sent to the access point.
  • the method further comprises discarding the data frame if the relay information bit indicates that no relay point forwarding is required.
  • Figure 6 provides a flow chart of one embodiment of the present invention.
  • the method further includes: S500 receiving, by the terminal, the information that the terminal selects the relay point; and the data frame sent by the receiving terminal includes: receiving, selecting, the relay point The data frame sent by the terminal.
  • the data frame further includes a relay point address information bit, where the relay point address information bit is used to carry address information of the relay point;
  • the data frame sent by the receiving terminal includes: a receiving station sent by the receiving terminal The data frame of the relay point address information bit is forwarded to the access point if the relay point address information bit information matches the address information of the relay point.
  • the method further includes: S502 modifying the data frame.
  • the relay information bit in the middle to prevent the data frame from being forwarded by other relay points.
  • the AP does not care which Relay site the data frame is forwarded through, and the Relay site is transparent to the AP.
  • the AP After receiving the frame, the AP sends an ACK and other confirmation information directly to the station that needs Relay after the SIFS duration.
  • the sending the data frame to the access point includes: sending, after the short frame interval duration, sending the location to the access point The data frame.
  • the CSMA/CA channel access mechanism accesses the channel by using a carrier sense multiple access technology with collision avoidance.
  • FIG. 7 is a structural diagram of an embodiment of a data transmitting terminal according to the present invention.
  • the terminal includes: a sending module 701, a receiving module 703; the sending module 701 is configured to send a data frame to the relay point, where the data frame includes a relay information bit, where the relay information bit is used to identify whether it is needed Transmitting, by the relay point, the data frame, if the relay information bit indicates that the relay point needs to forward the data frame, the data frame is forwarded by the relay point to an access point;
  • the module 703 is configured to receive a response message of the access point, where the response message is used to indicate that the data frame is correctly received by the access point.
  • the relay information bit indicates that the relay point is not required to forward the data frame, the data frame is discarded by the relay point.
  • the terminal further includes a selection module 705.
  • FIG. 8 is a structural diagram of another embodiment of the data transmitting terminal of the present invention.
  • the selecting module 705 is configured to select a relay point with the best quality by interacting with the relay point before sending the data frame to the relay point; the sending module is configured to use the relay selected by the selecting module Point to send data frames.
  • the data frame further includes a relay point address information bit, where the relay point address information bit is used to carry the address information of the selected relay point; the sending module is used to select the selected module. Sending, by the point, a data frame including the relay point address information bit, so that if the relay point address information bit information is consistent with the address information of the selected relay point, the data frame is selected by the The relay point is forwarded to the access point.
  • the sending module 701 is configured to send a data frame to the relay point by broadcasting.
  • the sending module 701 is further configured to: if the receiving module does not receive the response message of the access point in the first time period, resend the data frame to the relay point, where the first duration is twice The short frame interval duration, the slot duration, the transmission duration of the data frame, and the delay time of the receiver start are obtained.
  • the receiving module 703 is further configured to: after the sending module sends a data frame to the relay point, receive the data frame that is forwarded by the relay point; the sending module 701 is further configured to: if the receiving module receives The data frame is incorrect, and the data frame is resent to the relay point.
  • FIG. 9 is a structural diagram of an embodiment of a relay point for data forwarding according to the present invention.
  • the relay point includes: a receiving module 901, a sending module 903, the receiving module 901 is configured to receive a data frame sent by the terminal, where the data frame includes a relay information bit, where the relay information bit is used to identify whether The relay point is required to forward the data frame; the sending module 903 is configured to send the data frame to the access point if the relay information bit indicates that relay point forwarding is needed.
  • the data frame is discarded.
  • the receiving module 901 is further configured to: before receiving the data frame sent by the terminal, receive the information that the terminal selects the relay point, and receive a data frame that is sent by the terminal that selects the relay point.
  • the data frame further includes a relay point address information bit, where the relay point address information bit is used to carry address information of the relay point; and the receiving module 901 is configured to receive, by the terminal, the relay And a data frame of the address information bit, if the relay point address information bit information is consistent with the address information of the relay point, forwarding the data frame to the access point.
  • FIG. 10 is a structural diagram of an embodiment of a relay point for data forwarding according to the present invention.
  • the relay point further includes a modification module 905, where the modification module is configured to modify the relay information bit in the data frame to prevent the data frame from being forwarded by other relay points.
  • the sending module is specifically configured to send the data frame to the access point after receiving a short frame interval duration when the data frame sent by the terminal is received from the receiving module.
  • the sending module is configured to access the channel by using a carrier sense multiple access technology CSMA/CA channel access mechanism with collision avoidance after the receiving module receives the data frame sent by the terminal.
  • a system for transmitting data according to an embodiment of the present invention is characterized in that the system includes the terminal according to any of the above embodiments and the relay point according to any of the above embodiments.
  • modules in the apparatus in the embodiments may be distributed in the apparatus of the embodiment according to the embodiment, or may be correspondingly changed in one or more apparatuses different from the embodiment.
  • the modules of the above embodiments may be combined into one module, or may be further split into a plurality of sub-modules.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Small-Scale Networks (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

本发明实施例提供一种终端的数据发送方法,包括:向中继点发送数据帧,所述数据帧中包含中继信息位,所述中继信息位用于标识是否需要所述中继点转发所述数据帧,若所述中继信息位表示需要所述中继点转发所述数据帧,所述数据帧被所述中继点转发给接入点;接收所述接入点的应答消息,所述应答消息用于表示所述数据帧被所述接入点正确接收。通过本发明实施例数据发送、转发的方法和设备,提供了一种终端功率受限的情况下,终端和接入点的信息交互方法,以使功率受限终端发送的数据到达接入点。

Description

一种数据发送、 转发方法、 装置和系统 技术领域 本发明实施例涉及通信领域, 尤其涉及一种数据发送、 转发的方法、 装置和系统。 背景技术 在无线局域网中, 由于一个基本服务集 (Bas ic Service Set, BSS ) 需要覆盖的范围很大, 同时存在一些功率受限(电池供电) 的站点, 当这 些站点的电池性能恶化时 (电量低下) , 从这些站点发送出来的数据就无 法到达接入点 (Access Point , AP ) , 因此需要引入中继辅助这些站点的通 信。
现有技术提供一种为某个需要中继的站点指定一个中继(Re lay )的流 程。 其方案旨在为一个需要中继站点设定一个固定的 Re lay, 然后该站点发 送的数据都通过该 Re lay进行转发。
在现有技术中给出了站点和 Re lay的连接过程, 而没有站点和 Re lay连 接上之后的通信过程。 而且,现有技术设定一个固定 Re lay的方案, 当 Re lay 站点发生移动, 使得网络拓朴结构发生变化, 这时又需要给终端 (Station , STA )指定另外一个 Re lay站点。 当网络拓朴结构变化较快时, 现有方案需 要反复建立连接, 效率低下。 发明内容
本发明实施例提供了一种数据发送、 转发的方法、 装置和系统, 以解 决功率受限的站点和终端的通信问题。
本发明实施例提供一种终端的数据发送方法, 包括: 向中继点发送数 据帧, 所述数据帧中包含中继信息位, 所述中继信息位用于标识是否需要 所述中继点转发所述数据帧, 若所述中继信息位表示需要所述中继点转发 所述数据帧, 所述数据帧被所述中继点转发给接入点; 接收所述接入点的 应答消息, 所述应答消息用于表示所述数据帧被所述接入点正确接收。
本发明实施例提供一种中继点的数据转发方法, 包括: 接收终端发送 的数据帧, 所述数据帧中包含中继信息位, 所述中继信息位用于标识是否 需要所述中继点转发所述数据帧; 若中继信息位表示需要中继点转发, 向 接入点发送所述数据帧。
本发明实施例提供一种的数据发送终端, 所述终端包括: 发送模块、 接收模块; 所述发送模块用于向中继点发送数据帧, 所述数据帧中包含中 继信息位, 所述中继信息位用于标识是否需要所述中继点转发所述数据帧, 若所述中继信息位表示需要所述中继点转发所述数据帧, 所述数据帧被所 述中继点转发给接入点; 所述接收模块用于接收所述接入点的应答消息, 所述应答消息用于表示所述数据帧被所述接入点正确接收。
本发明实施例提供一种数据转发的中继点, 所述中继点包括: 接收模 块、 发送模块, 所述接收模块用于接收终端发送的数据帧, 所述数据帧中 包含中继信息位, 所述中继信息位用于标识是否需要所述中继点转发所述 数据帧; 所述发送模块用于若中继信息位表示需要中继点转发, 向接入点 发送所述数据帧。
通过本发明实施例数据发送、 转发的方法和设备, 提供了一种终端功 率受限的情况下, 终端和接入点的信息交互方法, 以使功率受限终端发送 的数据到达接入点 附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案, 下面将对 实施例或现有技术描述中所需要使用的附图作一简单地介绍, 显而易见地, 下面描述中的附图是本发明的一些实施例, 对于本领域普通技术人员来讲, 在不付出创造性劳动的前提下, 还可以根据这些附图获得其他的附图。
图 1为本发明终端的数据发送方法一个实施例的流程图;
图 2为本发明终端的数据发送方法又一个实施例的流程图;
图 3提供了本发明一个实施例中数据帧的帧控制头的结构;
图 4为本发明终端的数据发送方法再一个实施例的流程图;
图 5为本发明中继点的数据转发方法一个实施例的流程图;
图 6为本发明中继点的数据转发方法又一个实施例的流程图;
图 7为本发明数据发送终端一个实施例的结构图;
图 8为本发明数据发送终端一个实施例的结构图;
图 9为本发明数据转发的中继点一个实施例的结构图;
图 10为本发明数据转发的中继点另一个实施例的结构图。
具体实施方式
为使本发明实施例的目的、 技术方案和优点更加清楚, 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。 基于本发明中的实施例, 本领域普通技术人员在没有做出创造性劳动的前 提下所获得的所有其他实施例, 都属于本发明保护的范围。
本发明实施例提供了一种终端的数据发送方法, 如图 1所示, 图 1提供 了本发明一个实施例的流程图。 所述方法包括: S 101向中继点发送数据帧, 所述数据帧中包含中继信息位, 所述中继信息位用于标识是否需要所述中 继点转发所述数据帧, 若所述中继信息位表示需要所述中继点转发所述数 据帧, 所述数据帧被所述中继点转发给接入点; S103接收所述接入点的应 答消息, 所述应答消息用于表示所述数据帧被所述接入点正确接收。 在数据帧的帧控制头中加入一个 Bi t指示需要 Re lay, 不妨命名为 Re lay bi t。 比如, Re lay bi t=l的帧, 指示该帧需要被 Re lay; Re lay bi t=0的帧, 指示该帧不需要被 Re 1 ay。
在本发明的一个实施例中, 若所述中继信息位表示不需要所述中继点 转发所述数据帧, 所述数据帧被中继点丟弃。
在本发明的一个实施例中, 如图 2所示, 图 2提供了本发明一个实施例 的流程图。 在 S101所述向中继点发送数据帧之前, 所述方法还包括, S100 通过和中继点交互, 选择质量最好的中继点; 所述向中继点发送数据帧包 括: 向所述选择的中继点发送数据帧。
所述数据帧中还包含中继点地址信息位, 所述中继点地址信息位用于 携带所述选择的中继点的地址信息; 所述 S 103向所述选择的中继点发送数 据帧包括, 向所述选择的中继点发送包含所述中继点地址信息位的数据帧, 以使若所述中继点地址信息位信息与所述选择的中继点的地址信息一致, 所述数据帧被所述选择的中继点转发给接入点。
如图 3所示, 图 3提供了本发明一个实施例中数据帧的帧控制头的结构。 在数据帧的帧控制头中重新定义地址 3字段的含义, 地址 3用于携带携带 Re 1 ay站点的标识, 可以是 Re 1 a y站点的 MAC地址。 地址 1和地址 2分别代表数 据帧的发送终端和数据帧的目标接入点的地址信息。
由于在预先链接 Re lay时, Re lay站点知道与哪个站点建立链接, 同时 这一个信息也告之 AP。 因此, 由需要 Re lay的站点地址, Re lay站点可以判 断是否与该站点预先链接, AP也可以知道帧是通过哪个 Re lay站点转发的, 所以地址 3中也可以不携带 Re lay站点的信息。 此时, 只需要在帧控制中加 入一个指示需要 Re lay的比特.
在本发明的一个实施例中, 如图 4所示, 图 4提供了本发明一个实施例 的流程图。 所述 S101向中继点发送数据帧包括: 通过广播向中继点发送数 据帧。 本实施例提供了一种不预先选择转发中继点的数据发送方法, 在网 络拓朴结构变化较快时, 此方案不需要反复选择中继点, 效率更高。
在本发明的一个实施例中, 在所述 S101向中继点发送数据帧之后, 所 述方法还包括: 若在第一时长内没有接收到所述接入点的应答消息, 向所 述中继点重新发送所述数据帧, 所述第一时长根据两倍的短帧间距时长、 时隙时长、 数据帧的发送时长、 接收器启动的延时时长获得。
对于需要 Relay的站点, ACKTimeout Interva l = aSIFSTime*2 + aSlotTime+ aPPDUt ime + aPHY-RX- START- Delay。
其中, ACKTimeout Interva l用于表示所述第一时长, aSIFSTime是一 个短帧间 巨(Short Inter-frame Space , SIFS )的时长; aS lotTime是 802. 11 协议中定义的一个时隙的长度, 表示传播延时; aPPDUt ime表示的数据帧的 发送时长; aPHY-RX-START-Delay表示接收器启动的延时时长。 Relay站点 转发该帧时釆用设置周围站点的网络分配向量 (Network Al locat ion Vector , NAV ) , 所述 NAV表示发送数据帧中继点之外的其他中继点再所述 中继点发送所述数据帧后, 发送数据帧得等待时长。 当 Relay bi t表示需要 中继点转发数据帧时, 对于不是 Relay站点的周围站点, 设置其 NAV =SIFS+ACK + SIFS + aPPDUt ime , 其中 SIFS表示一个短帧间距 ( Shor t Inter-frame Space, SIFS ) 的时长, ACK表示所述第一时长, aPPDUt ime表 示的数据帧的发送时长。
在本发明的另一个实施例中, 在所述向中继点发送数据帧之后, 所述 方法还包括, 接收所述中继点转发的所述数据帧, 若所述中继点转发的所 述数据帧不正确, 向所述中继点重新发送所述数据帧。
本发明实施例提供了一种中继点的数据转发方法, 如图 5所示, 图 5提 供了本发明一个实施例的流程图。 包括: S501接收终端发送的数据帧, 所 述数据帧中包含中继信息位, 所述中继信息位用于标识是否需要所述中继 点转发所述数据帧; S503若中继信息位表示需要中继点转发, 向接入点发 送所述数据帧。
在本发明的一个实施例中, 所述方法还包括, 若中继信息位表示不需 要中继点转发, 丟弃所述数据帧。
在本发明的另一个实施例中, 如图 6所示, 图 6提供了本发明一个实施 例的流程图。 在 S501所述接收终端发送的数据帧之前, 所述方法还包括, S500接收所述终端选择所述中继点的信息; 所述接收终端发送的数据帧包 括: 接收选择所述中继点的所述终端发送的数据帧。
所述数据帧中还包含中继点地址信息位, 所述中继点地址信息位用于 携带所述中继点的地址信息; 所述接收终端发送的数据帧包括, 接收终端 发送的包含所述中继点地址信息位的数据帧, 若所述中继点地址信息位信 息与所述中继点的地址信息一致, 转发所述数据帧给接入点。
在本发明在本发明的一个实施例中, 在 S501所述接收终端发送的数据 帧之后, 所述 S503向接入点发送所述数据帧之前, 所述方法还包括, S502 修改所述数据帧中的所述中继信息位, 以防止所述数据帧被其他中继点接 收后转发。
比如, 在终端周围的 Re lay站点, 在收到 Re lay b i t=l的帧之后, 经过 SIFS时长修改 Re lay bi t=0 (防止被其他 Re lay站点再次转发) , 然后转发 该帧。 AP不关心数据帧是通过哪个 Re lay站点转发的, Re lay站点相对于 AP 是透明的。 AP在接收到帧后,经过 SIFS时长直接给需要 Re lay的站点发送 ACK 等确认信息。
在本发明的一个实施例中, 在所述接收终端发送的数据帧之后, 所述 向所述接入点发送所述数据帧包括, 在短帧间距时长后, 向所述接入点发 送所述数据帧。 在所述接收终端发送的数据帧之后, 所述向所述接入点发送所述数据 帧之前包括, 通过带碰撞避免的载波侦听多址技术 CSMA/ C A信道接入机制接 入信道。
本发明实施例提供了一种的数据发送终端, 如图 7所示, 图 7为本发明 数据发送终端一个实施例的结构图。 所述终端包括: 发送模块 701、 接收模 块 703; 所述发送模块 701用于向中继点发送数据帧, 所述数据帧中包含中 继信息位, 所述中继信息位用于标识是否需要所述中继点转发所述数据帧, 若所述中继信息位表示需要所述中继点转发所述数据帧, 所述数据帧被所 述中继点转发给接入点; 所述接收模块 703用于接收所述接入点的应答消 息, 所述应答消息用于表示所述数据帧被所述接入点正确接收。
若所述中继信息位表示不需要所述中继点转发所述数据帧, 所述数据 帧被所述中继点丟弃。
在本发明的另一个实施例中, 所述终端还包括选择模块 705。 如图 8所 示, 图 8为本发明数据发送终端另一个实施例的结构图。 所述选择模块 705 用于在所述向中继点发送数据帧之前, 通过和中继点交互, 选择质量最好 的中继点; 所述发送模块用于向所述选择模块选择的中继点发送数据帧。
所述数据帧中还包含中继点地址信息位, 所述中继点地址信息位用于 携带所述选择的中继点的地址信息; 所述发送模块用于向所述选择模块选 择的中继点发送包含所述中继点地址信息位的数据帧, 以使若所述中继点 地址信息位信息与所述选择的中继点的地址信息一致, 所述数据帧被所述 选择的中继点转发给接入点。
所述发送模块 701用于通过广播向中继点发送数据帧。
所述发送模块 701还用于, 若在第一时长内接收模块没有接收到所述接 入点的应答消息, 向所述中继点重新发送所述数据帧, 所述第一时长根据 两倍的短帧间距时长、 时隙时长、 数据帧的发送时长、 接收器启动的延时 时长获得。 所述接收模块 703还用于在所述发送模块向中继点发送数据帧之后, 接 收所述中继点转发的所述数据帧; 所述发送模块 701还用于若所述接收模块 接收的所述数据帧不正确, 向所述中继点重新发送所述数据帧。
本发明实施例提供了一种数据转发的中继点, 如图 9所示, 图 9为本发 明数据转发的中继点一个实施例的结构图。所述中继点包括:接收模块 901、 发送模块 903 , 所述接收模块 901用于接收终端发送的数据帧, 所述数据帧 中包含中继信息位, 所述中继信息位用于标识是否需要所述中继点转发所 述数据帧; 所述发送模块 903用于若中继信息位表示需要中继点转发, 向接 入点发送所述数据帧。
若中继信息位表示不需要中继点转发, 丟弃所述数据帧。
所述接收模块 901还用于在所述接收终端发送的数据帧之前, 接收所述 终端选择所述中继点的信息, 接收选择所述中继点的所述终端发送的数据 帧。
所述数据帧中还包含中继点地址信息位, 所述中继点地址信息位用于 携带所述中继点的地址信息; 所述接收模块 901用于接收终端发送的包含所 述中继点地址信息位的数据帧, 若所述中继点地址信息位信息与所述中继 点的地址信息一致, 转发所述数据帧给接入点。
本发明实施例提供了另一种数据转发的中继点, 如图 10所示, 图 10为 本发明数据转发的中继点一个实施例的结构图。 所述中继点还包括修改模 块 905 , 所述修改模块用于修改所述数据帧中的所述中继信息位, 以防止所 述数据帧被其他中继点接收后转发。
所述发送模块具体用于在从所述接收模块接收终端发送的数据帧时的 短帧间距时长后, 向所述接入点发送所述数据帧。
所述发送模块用于在所述接收模块接收终端发送的数据帧之后, 通过 带碰撞避免的载波侦听多址技术 CSMA/ C A信道接入机制接入信道。 本发明实施例一种数据发送的系统, 其特征在于, 所述系统包括, 如 上任一实施例所述的终端和如上任一项实施例所述的中继点。
本领域技术人员可以理解附图只是一个优选实施例的示意图, 附图中 的模块或流程并不一定是实施本发明所必须的。
本领域技术人员可以理解实施例中的装置中的模块可以按照实施例描 述进行分布于实施例的装置中, 也可以进行相应变化位于不同于本实施例 的一个或多个装置中。 上述实施例的模块可以合并为一个模块, 也可以进 一步拆分成多个子模块。
最后应说明的是: 以上实施例仅用以说明本发明的技术方案, 而非对 其限制; 尽管参照前述实施例对本发明进行了详细的说明, 本领域的普通 技术人员应当理解: 其依然可以对前述各实施例所记载的技术方案进行修 改, 或者对其中部分技术特征进行等同替换; 而这些修改或者替换, 并不 使相应技术方案的本质脱离本发明各实施例技术方案的精神和范围。

Claims

权利要求
1. 一种终端的数据发送方法, 其特征在于, 包括: 向中继点发送数据帧, 所述数据帧中包含中继信息位, 所述中继信息位用于标识是否需要所述 中继点转发所述数据帧, 若所述中继信息位表示需要所述中继点转发所 述数据帧, 所述数据帧被所述中继点转发给接入点; 接收所述接入点的 应答消息, 所述应答消息用于表示所述数据帧被所述接入点正确接收。
2. 根据权利要求 1所述的方法, 其特征在于, 包括: 若所述中继信息位表 示不需要所述中继点转发所述数据帧, 所述数据帧被所述中继点丟弃。
3. 根据权利要求 1或 2所述的方法, 其特征在于, 在所述向中继点发送数 据帧之前, 所述方法还包括, 通过和中继点交互, 选择质量最好的中继 点; 所述向中继点发送数据帧包括: 向所述选择的中继点发送数据帧。
4. 根据权利要求 3所述的方法, 其特征在于, 所述数据帧中还包含中继点 地址信息位, 所述中继点地址信息位用于携带所述选择的中继点的地址 信息; 所述向所述选择的中继点发送数据帧包括, 向所述选择的中继点 发送包含所述中继点地址信息位的数据帧, 以使若所述中继点地址信息 位信息与所述选择的中继点的地址信息一致, 所述数据帧被所述选择的 中继点转发给接入点。
5. 根据权利要求 1或 2所述的方法, 其特征在于, 所述向中继点发送数据 帧包括: 通过广播向中继点发送数据帧。
6. 根据权利要求 1至 5任一项所述的方法, 其特征在于, 在所述向中继点 发送数据帧之后, 所述方法还包括: 若在第一时长内没有接收到所述接 入点的应答消息, 向所述中继点重新发送所述数据帧, 所述第一时长根 据两倍的短帧间距时长、 时隙时长、 数据帧的发送时长、 接收器启动的 延时时长获得。
7. 根据权利要求 1至 6任一项所述的方法, 其特征在于, 在所述向中继点 发送数据帧之后,所述方法还包括,接收所述中继点转发的所述数据帧, 若所述中继点转发的所述数据帧不正确, 向所述中继点重新发送所述数 据帧。
8. 一种中继点的数据转发方法, 其特征在于, 包括: 接收终端发送的数据 帧, 所述数据帧中包含中继信息位, 所述中继信息位用于标识是否需要 所述中继点转发所述数据帧; 若中继信息位表示需要中继点转发, 向接 入点发送所述数据帧。
9. 根据权利要求 8所述的方法, 其特征在于, 若中继信息位表示不需要中 继点转发, 丟弃所述数据帧。
10.根据权利要求 8或 9所述的方法, 其特征在于, 在所述接收终端发送的 数据帧之前, 所述方法还包括, 接收所述终端选择所述中继点的信息; 所述接收终端发送的数据帧包括: 接收选择所述中继点的所述终端发送 的数据帧。
11.根据权利要求 10所述的方法, 其特征在于, 所述数据帧中还包含中继 点地址信息位, 所述中继点地址信息位用于携带所述中继点的地址信 息; 所述接收终端发送的数据帧包括, 接收终端发送的包含所述中继点 地址信息位的数据帧, 若所述中继点地址信息位信息与所述中继点的地 址信息一致, 转发所述数据帧给接入点。
12.根据权利要求 8或 9所述的方法, 其特征在于, 在所述接收终端发送的 数据帧之后, 所述向接入点发送所述数据帧之前, 所述方法还包括, 修 改所述数据帧中的所述中继信息位, 以防止所述数据帧被其他中继点接 收后转发。
13.根据权利要求 8至 12任一项所述的方法, 其特征在于, 在所述接收终 端发送的数据帧之后, 所述向所述接入点发送所述数据帧包括, 在短帧 间距时长后, 向所述接入点发送所述数据帧。
14.根据权利要求 8至 13所述的方法, 其特征在于, 在所述接收终端发送 的数据帧之后, 所述向所述接入点发送所述数据帧之前包括, 通过带碰 撞避免的载波侦听多址技术 CSMA/CA信道接入机制接入信道。
—种的数据发送终端, 其特征在于, 所述终端包括: 发送模块、 接收模 块; 所述发送模块用于向中继点发送数据帧, 所述数据帧中包含中继信 息位, 所述中继信息位用于标识是否需要所述中继点转发所述数据帧, 若所述中继信息位表示需要所述中继点转发所述数据帧, 所述数据帧被 所述中继点转发给接入点; 所述接收模块用于接收所述接入点的应答消 息, 所述应答消息用于表示所述数据帧被所述接入点正确接收。
根据权利要求 15所述的终端, 其特征在于, 包括: 若所述中继信息位表 示不需要所述中继点转发所述数据帧, 所述数据帧被所述中继点丟弃。 根据权利要求 15或 16所述的终端, 其特征在于, 所述终端还包括, 选 择模块, 所述选择模块用于在所述向中继点发送数据帧之前, 通过和中 继点交互, 选择质量最好的中继点; 所述发送模块用于向所述选择模块 选择的中继点发送数据帧。
根据权利要求 17 所述的终端, 其特征在于, 所述数据帧中还包含中继 点地址信息位, 所述中继点地址信息位用于携带所述选择的中继点的地 址信息; 所述发送模块用于向所述选择模块选择的中继点发送包含所述 中继点地址信息位的数据帧, 以使若所述中继点地址信息位信息与所述 选择的中继点的地址信息一致, 所述数据帧被所述选择的中继点转发给 接入点。
根据权利要求 15或 16所述的终端, 其特征在于, 所述发送模块用于通 过广播向中继点发送数据帧。
根据权利要求 15至 19任一项所述的终端, 其特征在于, 所述发送模块 还用于, 若在第一时长内接收模块没有接收到所述接入点的应答消息, 向所述中继点重新发送所述数据帧, 所述第一时长根据两倍的短帧间距 时长、 时隙时长、 数据帧的发送时长、 接收器启动的延时时长获得。 根据权利要求 15至 20任一项所述的终端, 其特征在于, 所述接收模块 还用于在所述发送模块向中继点发送数据帧之后, 接收所述中继点转发 的所述数据帧; 所述发送模块还用于若所述接收模块接收的所述数据帧 不正确, 向所述中继点重新发送所述数据帧。
—种数据转发的中继点, 其特征在于, 所述中继点包括: 接收模块、 发 送模块, 所述接收模块用于接收终端发送的数据帧, 所述数据帧中包含 中继信息位, 所述中继信息位用于标识是否需要所述中继点转发所述数 据帧; 所述发送模块用于若中继信息位表示需要中继点转发, 向接入点 发送所述数据帧。
根据权利要求 22所述的中继点, 其特征在于, 若中继信息位表示不需 要中继点转发, 丟弃所述数据帧。
根据权利要求 22或 23所述的中继点, 其特征在于, 所述接收模块还用 于在所述接收终端发送的数据帧之前, 接收所述终端选择所述中继点的 信息, 接收选择所述中继点的所述终端发送的数据帧。
根据权利要求 24所述的中继点, 其特征在于, 所述数据帧中还包含中 继点地址信息位, 所述中继点地址信息位用于携带所述中继点的地址信 息; 所述接收模块用于接收终端发送的包含所述中继点地址信息位的数 据帧, 若所述中继点地址信息位信息与所述中继点的地址信息一致, 转 发所述数据帧给接入点。
根据权利要求 22或 23所述的中继点, 其特征在于, 所述中继点还包括 修改模块, 所述修改模块用于修改所述数据帧中的所述中继信息位, 以 防止所述数据帧被其他中继点接收后转发。
根据权利要求 22至 26任一项所述的中继点, 其特征在于, 所述发送模 块具体用于在从所述接收模块接收终端发送的数据帧时的短帧间距时 长后, 向所述接入点发送所述数据帧。
根据权利要求 22至 27所述的中继点, 其特征在于, 所述发送模块用于 在所述接收模块接收终端发送的数据帧之后, 通过带碰撞避免的载波侦 听多址技术 CSMA/CA信道接入机制接入信道。
—种数据发送的系统, 其特征在于, 所述系统包括, 如权利要求 15 至 21任一项所述的终端和如权利要求 22至 28任一项所述的中继点。
PCT/CN2013/073237 2012-05-26 2013-03-27 一种数据发送、转发方法、装置和系统 WO2013177972A1 (zh)

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