WO2015066846A1 - 一种数据通信的方法、站点及系统 - Google Patents

一种数据通信的方法、站点及系统 Download PDF

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Publication number
WO2015066846A1
WO2015066846A1 PCT/CN2013/086577 CN2013086577W WO2015066846A1 WO 2015066846 A1 WO2015066846 A1 WO 2015066846A1 CN 2013086577 W CN2013086577 W CN 2013086577W WO 2015066846 A1 WO2015066846 A1 WO 2015066846A1
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WIPO (PCT)
Prior art keywords
access point
station
access
message
channel
Prior art date
Application number
PCT/CN2013/086577
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English (en)
French (fr)
Inventor
杨浔
姜艳平
赵牧
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华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2013/086577 priority Critical patent/WO2015066846A1/zh
Priority to CN201380078450.6A priority patent/CN105409292B/zh
Publication of WO2015066846A1 publication Critical patent/WO2015066846A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access
    • H04W74/002Transmission of channel access control information
    • H04W74/004Transmission of channel access control information in the uplink, i.e. towards network
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W48/00Access restriction; Network selection; Access point selection
    • H04W48/20Selecting an access point

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a data communication method, station, and system. Background technique
  • wireless devices such as access points (APs) and stations (Stations) are deployed more and more, in densely deployed wireless LANs, due to continuous For the network, there may be areas where signals overlap between adjacent Basic Service Sets (BSSs). Since the spectrum resources are limited, these adjacent BSSs may work on the same channel, causing adjacent BSSs to form an Overlapped Basic Service Set (OBSS). STAs in the overlapping areas of adjacent BSSs will be affected by multiple BSSs within the sensing range when communicating, so that STAs in overlapping areas are susceptible to severe interference after channel access.
  • BSSs Basic Service Sets
  • OBSS Overlapped Basic Service Set
  • the STA implements the data communication method mainly based on the Request To Send (RTS) / Clear To Send (CTS) protocol, that is, the RTS/CTS protocol.
  • RTS Request To Send
  • CTS Clear To Send
  • the specific process is as follows: STA Broadcast RTS, requesting data communication with the AP to be communicated, the communication AP broadcasts the CTS after receiving the RTS, and allows the STA to perform data communication.
  • Other STAs will set their own network allocation vector when receiving the RTS and CTS (Network Allocation) Vector, the cylinder is called NAV. During the NAV configuration, other STAs will not send messages any more, so that other STAs will compete for channels when the STA performs data communication.
  • NAV Network Allocation
  • STA1 is located in an overlapping area between BSS1 and BSS2, API and AP2 are located in the working area of STA1, and STA2 is located outside the working area of STA1.
  • STA1 wants to communicate with the API corresponding to BSS 1, it will broadcast RTS. If AP2 receives RTS normally, it will set its own NAV, and will not interfere with the communication between STA1 and API, but if AP2 is communicating with STA2 at this time. If the RTS is not received normally, it will affect the CTS returned by the STA1 receiving API.
  • Embodiments of the present invention provide a data communication method, station, and system, which solve the problem of high system useless power consumption, low communication efficiency, and high communication interference in the OBSS system.
  • a first aspect of the embodiments of the present invention provides a data communication method, which may include:
  • the station sends a sequence number to an access point in the work area of the station, the sequence number is used to indicate the order in which each access point answers the site;
  • the station accesses a channel through the first access point to perform data communication with the first access point.
  • the site and the associated first access point confirm that the channel is accessed by using the first access point, receiving the working area of the site
  • the other access points sequentially return the allowed messages according to the serial number, including:
  • the station broadcasts a request to send a message, and requests an access channel to the associated first access point; the station receives the first allowed sending message returned by the first access point according to the serial number, and then receives the
  • the other access points in the work area of the site are sequentially sent according to the sequence number, and the other access points include at least a second access point, where the first allowed sending message is used for the first access
  • the point allows the station to access the channel and instructs other stations in the working area of the first access point to set its own network allocation vector, and the allowed transmission message returned by the second access point is the second permission to send a message.
  • the second allowable sending message is used to indicate that the second access point and other stations located in the working area of the second access point respectively set their own network allocation vector, where the network allocation vector is used to configure the device to be silent. time.
  • the other access point includes at least a second access point, the allowable sending message returned by the second access point is a second allowed sending message, and the second allowed sending message is used to indicate the second access point and located
  • the other stations in the working area of the second access point respectively set their own network allocation vectors, and the network allocation vectors are used to configure the time when the devices are silent.
  • the other access point returns a time for allowing the message to be sent according to the corresponding access point.
  • the serial number is determined.
  • the method further includes:
  • the station broadcasts an acknowledgment message to the other access point to sequentially return an allow-to-send message according to the sequence number after receiving the acknowledgment message.
  • a fifth possible implementation if the site and the associated first access point When it is confirmed that the first access point accesses the channel and does not receive the allowable transmission message returned by the other access point within a preset time, it is determined that the channel is busy and data communication cannot be performed.
  • the method further includes:
  • the station sends a cancel message to the first access point such that the first access point releases resources reserved for the station.
  • the other access point returns The allowable sending message includes time information that the other access point allows the station to occupy the channel.
  • a second aspect of the embodiments of the present invention provides a site, which may include:
  • a sending unit configured to send a sequence number to an access point in a working area of the station, where the serial number is used to indicate an order in which each access point answers the station;
  • a receiving unit configured to: when the station and the associated first access point confirm to access the channel by using the first access point, receive other access points in the working area of the site according to the sequence number Return The back permission to send a message allows the message to be sent;
  • An access unit configured to perform data communication with the first access point by using the first access point access channel.
  • the sending unit is specifically configured to: broadcast a request to send a message, and request an access channel from the associated first access point;
  • the receiving unit is configured to receive a first allowed sending message that is returned by the first access point according to the serial number, and then receive an allowable return of other access points in the working area of the station according to the serial number.
  • Sending a message the other access point includes at least a second access point, where the first allowed to send message is used by the first access point to allow the station to access a channel and instruct the first access point to work Other stations in the area set their own network allocation vector, the allowed transmission message returned by the second access point is a second permission to send message, and the second allowed transmission message is used to indicate the second access point and located
  • the other stations in the working area of the second access point respectively set their own network allocation vectors, and the network allocation vectors are used to configure the time when the devices are silent.
  • the receiving unit is specifically configured to receive a request sending message of the first access point, and receive other access points in the working area of the site according to the The serial number is returned in sequence to allow the sending of the message, the other access point includes at least a second access point, the allowed sending message returned by the second access point is a second allowed sending message, and the second allowed sending message is used.
  • the other access point returns a time for allowing the message to be sent according to the corresponding access point.
  • the serial number is determined.
  • the sending unit further And being used to broadcast an acknowledgement message, so that the other access point returns the permission to send message according to the sequence number after receiving the acknowledgement message.
  • a fifth possible implementation if the site and the associated first access point Confirm pass After the first access point accesses the channel, if the receiving unit does not receive the permission to send the message returned by the other access point within a preset time, it determines that the channel is busy and cannot perform data communication.
  • the sending unit is further configured to send a cancel message to the The first access point is described, so that the first access point releases resources reserved for the station.
  • the access point returns an allowable transmission
  • the message includes duration information that the other access point allows the station to occupy the channel.
  • a third aspect of the embodiments of the present invention provides a computer program product, which may include a computer readable medium, the computer readable medium comprising a set of program code for performing the first aspect or the first aspect of the embodiment of the present invention.
  • a computer program product may include a computer readable medium, the computer readable medium comprising a set of program code for performing the first aspect or the first aspect of the embodiment of the present invention.
  • a fourth aspect of the embodiments of the present invention provides a system, which may include:
  • the first access point associated with the site, when receiving a request to send a message of the site, according to the site allocation
  • the sequence number returns a first allowable send message, or a send request sends a message invites the site access channel, the first allow send message is used by the first access point to allow the station to access a channel and indicate the Other stations in the working area of the first access point set their own network allocation vector;
  • the second permission to send a message is used to indicate that the second access point and other stations located in the working area of the second access point respectively set their own network allocation vector, the network allocation Vectors are used to configure when the device is silent.
  • the station After confirming that the first access point accesses the channel by the first access point, the station does not immediately access the channel, performs data communication, and must also receive the allowed transmission returned by other access points.
  • the message allows other access points in the working area of the site and the sites under each access point to understand the situation, and then access the channel for data communication, thereby avoiding communication interference and time conflict between the devices. Reduce system power consumption and ensure normal communication.
  • Figure 1 is a schematic diagram of a scenario of an OBSS system
  • FIG. 2 is a schematic flow chart of a first embodiment of a data communication method according to the present invention.
  • FIG. 3 is a schematic flowchart of a second embodiment of a data communication method according to the present invention.
  • FIG. 4 is a schematic flow chart of a third embodiment of a data communication method according to the present invention.
  • FIG. 5 is a schematic flowchart diagram of a fourth embodiment of a data communication method according to the present invention.
  • FIG. 6 is a schematic flowchart of a fifth embodiment of a data communication method according to the present invention.
  • Figure 7 is a schematic diagram showing the composition of a first embodiment of a station of the present invention.
  • Figure 8 is a schematic diagram showing the composition of a second embodiment of the station of the present invention.
  • FIG. 9 is a schematic diagram of the composition of a system according to an embodiment of the present invention. detailed description
  • FIG. 2 it is a schematic flowchart of a first embodiment of a data communication method according to the present invention.
  • the method includes the following steps:
  • the station sends a serial number to an access point in a working area of the site.
  • the sequence number is used to indicate the order in which each access point answers the site.
  • the station may assign a serial number to each access point in advance. It is sent to each access point accordingly.
  • the first access point may allocate the sequence number 1 in the first place as the initial access point.
  • Other access points may be assigned or randomly assigned with reference to distance, interference or other factors.
  • the station may access the channel by actively sending a request to send a message, or may passively receive the request sending message sent by the first access point to perform channel access and data communication.
  • the station must receive other access. After the point return is allowed to send the message, the channel can be accessed.
  • the other access points and the stations under each access point know that the station is accessing the channel for data communication, so it can be in a period of time. Keep silent, thus avoiding an increase in useless power consumption and reducing interference to the site.
  • the allowable sending message returned by the other access point may include duration information that the other access point allows the station to occupy the channel.
  • the network transmission vector (Network Allocation Vector) is carried in the allowed transmission message returned by the other access points, and the quiet time of the device can be configured through the NAV.
  • S203 The station accesses a channel through the first access point, and performs data communication with the first access point.
  • the station After the site receives the permission to send message returned by the other access point, the station accesses the channel through the first access point, and no other access point sends the site to the site. The message will not be sent to the first access point by other stations, thereby avoiding communication conflicts and interference, and reducing the useless power consumption of the entire system.
  • the station after confirming that the first access point accesses the channel by the first access point, the station does not immediately access the channel, performs data communication, and must receive other connections.
  • the incoming message returned by the ingress allows the other access points in the working area of the site and the sites under each access point to understand the situation, and then access the channel for data communication, thereby avoiding the interaction between the devices. Communication interference and time conflicts reduce system power consumption and ensure normal communication.
  • the existing RTS/CTS interaction may be used to determine the status of the site or the access point, and establish a path to implement data communication. Of course, other information may also be used for interaction. It is only necessary to ensure that the information sent by the station can carry the address of the first access point, which is beneficial for other access points to return a corresponding response message when receiving the information and set the site and the site in the corresponding area to be silent.
  • FIG. 3 it is a schematic flowchart of a second embodiment of a data communication method according to the present invention.
  • the method includes the following steps:
  • the station sends a sequence number to an access point in a working area of the site.
  • the sequence number is used to indicate the order in which each access point answers the site.
  • the station broadcasts a request to send a message, and requests an access channel from the associated first access point. Specifically, the station may actively broadcast a request to send a message, and the request to send the message may also be replaced by another message that is reconfigured, and only the address of the first access point is carried in the message, which is beneficial to the first access point. Return the response message with other access points.
  • the station receives a first allowed sending message that is returned by the first access point according to the serial number, and then receives an allowable sending message that is returned by other access points in the working area of the station according to the serial number. .
  • the site actively broadcasts a request to send a message
  • the sequence number of the first access point is in the first place, and the first permission to send the message is first returned, so as to confirm the subsequent pass with the site.
  • the first access point accesses a channel.
  • the other access points then return to allow the message to be sent according to the sequence number.
  • the other access point includes at least a second access point, where the first allowed to send message is used by the first access point to allow the station to access a channel and indicate the working area of the first access point.
  • the other sites within the network set their own network allocation vector, the allowed transmission message returned by the second access point is a second permission to send message, and the second permission to send message is used to indicate the second access point and the location
  • the other stations in the working area of the second access point respectively set their own network allocation vectors, which are used to configure the time when the devices are silent.
  • the first allowable sending message and the allowed sending message returned by other access points may also be replaced by other messages that are reconfigured, and only need to carry NAV in these messages.
  • the time when the other access point returns to allow the message to be sent may be according to each access point pair.
  • the serial number should be determined.
  • the other access points may be waiting:
  • N is the sequence number corresponding to the access point and N is greater than or equal to 0
  • SIFS is the short frame spacing
  • 0 ⁇ _1 is the CTS response duration
  • PHY_delay is the physical layer transmission delay.
  • the station performs data communication with the first access point by using the first access point access channel.
  • FIG. 4 it is a schematic flowchart of a third embodiment of a data communication method according to the present invention.
  • the method includes the following steps:
  • the station sends a serial number to an access point in a working area of the site.
  • the sequence number is used to indicate the order in which each access point answers the site.
  • the station receives a request sending message of the first access point, and the broadcast allows to send a message.
  • the site may also access the channel by passively receiving the invitation of the first access point. Only when the request to send the message of the first access point is received, the broadcast allows the message to be sent, and the process of confirming with the first access point can be completed.
  • request sending message here may also be replaced by other messages that are reconfigured, and only need to ensure that the address information of the site is carried; the allowed sending message may also be replaced by other messages that are reconfigured, only The address information and the NAV of the first access point need to be carried, so that other access points broadcast the message and set the NAV when receiving a message that is not their own.
  • the station receives an allowable sending message that is returned by other access points in the working area of the station according to the serial number.
  • the other access point includes at least a second access point, the allowable sending message returned by the second access point is a second allowed sending message, and the second allowed sending message is used to indicate the second access point And other stations located in the working area of the second access point respectively set their own network allocation vector, and the network allocation vector is used to configure the time when the device is silent.
  • the device may return an allowable sending message according to the sequence number, and the allowed sending message carries the NAV, so that the other access point and the other connection The site under the entry point remains silent for a period of time.
  • the station performs data communication with the first access point by using the first access point access channel.
  • 5 is a schematic flowchart of a fourth embodiment of a data communication method according to the present invention. In this embodiment, the method includes the following steps:
  • the station sends a serial number to an access point in the working area of the site.
  • the station broadcasts a request to send a message, and requests an access channel from the associated first access point. S503.
  • the station receives a first allowed sending message that is returned by the first access point according to the sequence number.
  • S504 The station broadcasts an acknowledgment message, so that the other access point returns the permission to send message according to the sequence number after receiving the acknowledgment message.
  • the station may broadcast an acknowledgement message to notify other access points in the working area, and the station has received the first access point. Acknowledgment, the other access points may begin to return to allow transmission of messages in sequence.
  • S505 The station receives an allowable sending message that is returned by other access points in the working area of the station according to the serial number.
  • the station accesses a channel by using the first access point to perform data communication with the first access point.
  • the broadcast confirmation message can shorten the time for other access points to return to allow the message to be sent, thereby improving the overall communication efficiency.
  • FIG. 6 a schematic flowchart of a fifth embodiment of a data communication method according to the present invention is provided.
  • the method includes the following steps:
  • the station sends a serial number to an access point in the working area of the site.
  • the station sends a cancel message to the first access point, so that the first access point releases resources reserved for the station.
  • the resource here may be a channel resource or other resource reserved by the first access point for the station.
  • the site When the site has confirmed that communication is impossible, the resource can be released as soon as possible by sending a cancel message, so as to facilitate the use of other sites, thereby improving the utilization efficiency of system resources.
  • FIG. 7 it is a schematic flowchart of a first embodiment of a site according to the present invention.
  • the site includes:
  • the sending unit 100 is configured to send a sequence number to an access point in the working area of the site, where the sequence number is used to indicate an order in which each access point answers the site;
  • the receiving unit 200 is configured to: when the station and the associated first access point confirm to access the channel by using the first access point, receive another access point in the working area of the station according to the serial number Allowing to send messages in turn;
  • the access unit 300 is configured to perform data communication with the first access point by using the first access point access channel.
  • the sending unit 100 is specifically configured to broadcast a request to send a message, and request an access channel from the associated first access point;
  • the receiving unit 200 is specifically configured to receive a first allowed sending message that is returned by the first access point according to the serial number, and then receive other access points in the working area of the station to return according to the serial number. Allowing to send a message, the other access point includes at least a second access point, the first allowed to send message is used by the first access point to allow the station to access a channel and indicate the first access point.
  • the other sites in the work area set their own network allocation vector
  • the allowable sending message returned by the second access point is a second allowed to send message
  • the second allowed sending message is used to indicate the second access point and Other stations located in the working area of the second access point respectively set their own network allocation vectors, and the network allocation vectors are used to configure the time when the devices are silent.
  • the receiving unit 200 is specifically configured to receive a request sending message of the first access point, and receive an allowable sending message that is returned by other access points in the working area of the station according to the sequence number,
  • the other access point includes at least a second access point, the allowable sending message returned by the second access point is a second allowed sending message, and the second allowed sending message is used to indicate the second access point and located
  • the other stations in the working area of the second access point respectively set their own network allocation vectors, and the network allocation vectors are used to configure the time when the devices are silent;
  • the sending unit 100 is further configured to: after the receiving unit receives the request sending message of the first access point, broadcast the permission to send the message.
  • the sending unit 100 is further configured to broadcast an acknowledgment message, so that the other access point receives the acknowledgment message according to the The serial number in turn returns to allow the message to be sent. If the station and the associated first access point confirm to access the channel through the first access point, the receiving unit 200 does not receive the allowable sending message returned by the other access point within a preset time. At this time, it is determined that the channel is busy and data communication cannot be performed.
  • the sending unit 100 is further configured to send a cancel message to the first access point, so that the first access point is released as the site pre- Resources left.
  • the allowable sending message returned by the other access point includes duration information that the other access point allows the station to occupy the channel.
  • the foregoing sending unit, the receiving unit, and the access unit may exist independently or may be integrated, and the sending unit, the receiving unit, or the access unit in the above site embodiment may be independent of the processor of the station in the form of hardware. Separately set, and the form of setting may be in the form of a microprocessor; it may also be embedded in the processor of the site in hardware form, or may be stored in the memory of the site in software, so that the processor of the site can perform the above sending. The operation of the unit, receiving unit or access unit.
  • the access unit in the first embodiment of the inventive site (the embodiment shown in Figure 7), the access unit
  • the 300 may be the processor of the site, and the functions of the sending unit 100 and the receiving unit 200 may be embedded in the processor, or may be separately set independently of the processor, or may be stored in the memory in the form of software.
  • the call implements its functionality.
  • the sending unit 100 and the receiving unit 200 may be integrated, or may be set independently, or may be used as an interface circuit of the station, independently set or integrated.
  • the embodiment of the invention does not impose any limitation.
  • the above processor may be a central processing unit (CPU), a microprocessor, a single chip microcomputer or the like.
  • FIG. 8 is a schematic diagram of a composition of a second embodiment of a station according to the present invention.
  • the station includes: an interface circuit 400, a memory 500, and a processor connected to the interface circuit 400 and the memory 500. 600.
  • the memory 500 is used to store a set of program codes
  • the processor 600 is used to call the program code stored in the memory 500 to perform the operations described in any of the first to fifth embodiments of the data communication method of the present invention.
  • FIG. 9 is a schematic structural diagram of a system according to an embodiment of the present invention.
  • the system includes:
  • the first access point 120 is associated with the site 110, and when receiving the request sending message of the site 110, returns a first allowed sending message according to the serial number assigned by the station 110, or sends a request to send a message to the invitation station.
  • the site 110 accesses a channel, and the first allowed to send message is used by the first access point 120 to allow the site 110 to access a channel and instruct other stations in the working area of the first access point 120 to set themselves.
  • Network allocation vector
  • a second access point 130 located in a working area of the site 110, when the site 110 and the first access point 120 confirm access to the channel through the first access point 120, according to the site
  • the assigned sequence number of the 110 returns a second allowable sending message, where the second allowed sending message is used to indicate that the second access point 130 and other stations located in the working area of the second access point 130 respectively set their own A network allocation vector, the network allocation vector is used to configure the time at which the device is silent.
  • the present invention has the following advantages:
  • the station After confirming that the first access point accesses the channel by the first access point, the station does not immediately access the channel, performs data communication, and must also receive the allowed transmission returned by other access points.
  • the message allows other access points in the working area of the site and the sites under each access point to understand the situation, and then access the channel for data communication, thereby avoiding communication interference and time conflict between the devices. Reduce system power consumption and ensure normal communication.
  • the foregoing program may be stored in a computer readable storage medium, and the program is executed when executed.
  • the foregoing steps include the steps of the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

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Abstract

本发明实施例公开了一种数据通信的方法,包括:站点发送序列号到所述站点工作区域内的接入点,所述序列号用于指示各个接入点应答所述站点的顺序;当所述站点需要通过已关联的第一接入点接入信道时,接收所述站点工作区域内的其他接入点根据所述序列号依次返回的允许发送消息允许发送消息;所述站点通过所述第一接入点接入信道,与所述第一接入点进行数据通信。本发明实施例还公开了一种站点及系统。采用本发明,可减少OBSS系统的无用功耗,提升通信效率,降低通信干扰。

Description

一种数据通信的方法、 站点及系统
技术领域
本发明涉及通信技术领域, 尤其涉及一种数据通信的方法、 站点及系统。 背景技术
随着无线通信技术的迅猛发展, 无线设备如接入点 (Access Point, 筒称 AP )和站点 (Station, 筒称 STA ) 的部署也越来越多, 在密集部署的无线局 域网中, 由于连续布网的需要, 相邻的基本服务集(Basic Service Set, 筒称 BSS )之间可能会存在信号交叠的区域。 由于频谱资源是有限的, 这些相邻的 BSS有可能工作在相同的信道上, 从而导致相邻的 BSS 形成交叠基本服务集 ( Overlapped Basic Service Set,筒称 OBSS )。处于相邻的 BSS交叠区域的 STA, 其在通信时将会受到感知范围内的多个 BSS的影响,使得处于交叠区域的 STA 在信道接入后容易受到严重的干扰。
在现有技术中, STA实现数据通信的方法主要基于请求发送( Request To Send, 筒称 RTS ) /允许发送( Clear To Send, 筒称 CTS )协议即 RTS/CTS协 议实现, 具体过程如下: STA广播 RTS, 请求与待通信 AP进行数据通信, 待 通信 AP在接收到 RTS后广播 CTS, 允许 STA进行数据通信, 其他的 STA在 接收到 RTS和 CTS时,将设置自己的网络分配矢量( Network Allocation Vector, 筒称 NAV ), 在 NAV配置的时间内, 其他的 STA均不会再发送消息, 从而避 免在 STA进行数据通信时, 其他的 STA竟争信道。 但是, 对于 OBSS系统中 处于交叠区域的 STA, 现有技术中的方法已经不再适用。 如图 1所示, STA1 位于 BSS1与 BSS2的交叠区域, API和 AP2位于 STA1的工作区域内, STA2 位于 STA1的工作区域外。当 STA1想与 BSS 1对应的 API通信时,会广播 RTS , AP2若正常接收到 RTS便会设定自己的 NAV,不去干扰 STA1与 API的通信, 但是若 AP2由于此时正在与 STA2通信而没有正常接收到 RTS,则会影响 STA1 接收 API返回的 CTS,即便 STA1接收到 API返回的 CTS,但是 STA1与 API 的通信仍会和 STA2与 AP2的通信形成交叉干扰; 或者 AP2成功接收 RTS并 设置自己的 NAV, 但是此时 STA2处于 STA1的工作区域外, 因此 STA2不会 设置自己的 NAV, 其仍可能像 AP2发起通信, 造成系统无用功耗的增加, 系 统的通信效率下降, 且 STA2向 AP2发起通信, 将导致 AP2无法根据 STA1 向 API发送的数据消息再次设置 NAV,这样 AP2将在 STA1向 API发送数据 消息的时候, 可能与 STA2通信或向 STA1发起通信, 从而对 STA1与 API的 通信造成干扰。当 API向 STA1发送 RTS,发起通信时,情况类似,不再赘述。 综合上述描述可知, 采用现有技术, 在 OBSS系统中, 将存在系统无用功耗增 加, 通信效率低下, 通信干扰较多的问题。 发明内容
本发明实施例提供了一种数据通信的方法、 站点及系统, 以解决 OBSS系 统中, 系统无用功耗较高、 通信效率低下以及通信干扰较多的问题。
本发明实施例第一方面提供了一种数据通信的方法, 可包括:
站点发送序列号到所述站点工作区域内的接入点,所述序列号用于指示各 个接入点应答所述站点的顺序;
当所述站点和已关联的第一接入点确认通过所述第一接入点接入信道时, 接收所述站点工作区域内的其他接入点根据所述序列号依次返回的允许发送 消息;
所述站点通过所述第一接入点接入信道,与所述第一接入点进行数据通信。 在第一方面的第一种可能的实现方式中,所述当所述站点和已关联的第一 接入点确认通过所述第一接入点接入信道时,接收所述站点工作区域内的其他 接入点根据所述序列号依次返回的允许发送消息, 包括:
所述站点广播请求发送消息, 向已关联的第一接入点请求接入信道; 所述站点接收所述第一接入点根据所述序列号返回的第一允许发送消息, 再接收所述站点工作区域内的其他接入点根据所述序列号依次返回的允许发 送消息, 所述其他接入点至少包括第二接入点, 所述第一允许发送消息用于所 述第一接入点允许所述站点接入信道并指示所述第一接入点工作区域内的其 他站点设置自身的网络分配矢量,所述第二接入点返回的允许发送消息为第二 允许发送消息,所述第二允许发送消息用于指示所述第二接入点以及位于所述 第二接入点工作区域内的其他站点分别设置自身的网络分配矢量,所述网络分 配矢量用于配置设备静默的时间。
在第一方面的第二种可能的实现方式中,所述当所述站点和已关联的第一 接入点确认通过所述第一接入点接入信道时,接收所述站点工作区域内的其他 接入点根据所述序列号依次返回的允许发送消息, 包括:
所述站点接收所述第一接入点的请求发送消息, 广播允许发送消息; 所述站点接收所述站点工作区域内的其他接入点根据所述序列号依次返 回的允许发送消息, 所述其他接入点至少包括第二接入点, 所述第二接入点返 回的允许发送消息为第二允许发送消息,所述第二允许发送消息用于指示所述 第二接入点以及位于所述第二接入点工作区域内的其他站点分别设置自身的 网络分配矢量, 所述网络分配矢量用于配置设备静默的时间。
结合第一方面或结合第一方面的第一或第二种可能的实现方式,在第三种 可能的实现方式中,所述其他接入点返回允许发送消息的时间根据各个接入点 对应的序列号确定。
结合第一方面的第一种可能的实现方式,在第四种可能的实现方式中,在 所述站点接收所述第一接入点返回的第一允许发送消息之后, 还包括:
所述站点广播确认消息以便所述其他接入点接收到所述确认消息后根据 所述序列号依次返回允许发送消息。
结合第一方面或结合第一方面的第一或第二或第三或第四种可能的实现 方式,在第五种可能的实现方式中, 若所述站点和已关联的第一接入点确认通 过所述第一接入点接入信道,在预设时间内未接收到所述其他接入点返回的允 许发送消息时, 则判定信道繁忙, 无法进行数据通信。
结合第一方面的第五种可能的实现方式,在第六种可能的实现方式中, 在 所述站点判定信道繁忙, 无法进行数据通信之后, 还包括:
所述站点发送取消消息至所述第一接入点,以便所述第一接入点释放为所 述站点预留的资源。
结合第一方面或结合第一方面的第一或第二或第三或第四或第五或第六 种可能的实现方式,在第七种可能的实现方式中, 所述其他接入点返回的允许 发送消息中包含所述其他接入点允许所述站点占用信道的时长信息。
本发明实施例第二方面提供了一种站点, 可包括:
发送单元, 用于发送序列号到所述站点工作区域内的接入点, 所述序列号 用于指示各个接入点应答所述站点的顺序;
接收单元,用于当所述站点和已关联的第一接入点确认通过所述第一接入 点接入信道时,接收所述站点工作区域内的其他接入点根据所述序列号依次返 回的允许发送消息允许发送消息;
接入单元, 用于通过所述第一接入点接入信道, 与所述第一接入点进行数 据通信。
在第二方面的第一种可能的实现方式中,所述发送单元具体用于广播请求 发送消息, 向已关联的第一接入点请求接入信道;
所述接收单元具体用于接收所述第一接入点根据所述序列号返回的第一 允许发送消息,再接收所述站点工作区域内的其他接入点根据所述序列号依次 返回的允许发送消息, 所述其他接入点至少包括第二接入点, 所述第一允许发 送消息用于所述第一接入点允许所述站点接入信道并指示所述第一接入点工 作区域内的其他站点设置自身的网络分配矢量,所述第二接入点返回的允许发 送消息为第二允许发送消息,所述第二允许发送消息用于指示所述第二接入点 以及位于所述第二接入点工作区域内的其他站点分别设置自身的网络分配矢 量, 所述网络分配矢量用于配置设备静默的时间。
在第二方面的第二种可能的实现方式中,所述接收单元具体用于接收所述 第一接入点的请求发送消息;以及接收所述站点工作区域内的其他接入点根据 所述序列号依次返回的允许发送消息, 所述其他接入点至少包括第二接入点, 所述第二接入点返回的允许发送消息为第二允许发送消息,所述第二允许发送 消息用于指示所述第二接入点以及位于所述第二接入点工作区域内的其他站 点分别设置自身的网络分配矢量,所述网络分配矢量用于配置设备静默的时间; 所述发送单元还用于在所述接收单元接收到所述第一接入点的请求发送 消息后, 广播允许发送消息。
结合第二方面或结合第二方面的第一或第二种可能的实现方式,在第三种 可能的实现方式中,所述其他接入点返回允许发送消息的时间根据各个接入点 对应的序列号确定。
结合第二方面的第三种可能的实现方式,在第四种可能的实现方式中,在 所述接收单元接收所述第一接入点返回的第一允许发送消息之后,所述发送单 元还用于广播确认消息以便所述其他接入点接收到所述确认消息后根据所述 序列号依次返回允许发送消息。
结合第二方面或结合第二方面的第一或第二或第三或第四种可能的实现 方式,在第五种可能的实现方式中, 若所述站点和已关联的第一接入点确认通 过所述第一接入点接入信道,在预设时间内所述接收单元未接收到所述其他接 入点返回的允许发送消息时, 则判定信道繁忙, 无法进行数据通信。
结合第二方面的第五种可能的实现方式,在第六种可能的实现方式中, 在 所述接收单元判定信道繁忙, 无法进行数据通信之后,所述发送单元还用于发 送取消消息至所述第一接入点 ,以便所述第一接入点释放为所述站点预留的资 源。
结合第二方面或结合第二方面的第一或第二或第三或第四或第五或第六 种可能的实现方式,在第七种可能的实现方式中,接入点返回的允许发送消息 中包含所述其他接入点允许所述站点占用信道的时长信息。
本发明实施例第三方面提供了一种计算机程序产品,可包括计算机可读介 质, 所述计算机可读介质包括一组程序代码, 用于执行如本发明实施例第一方 面或第一方面任一实现方式所述的方法。
本发明实施例第四方面提供了一种系统, 可包括:
如本发明实施例第二方面或第二方面任一实现方式所述的站点; 第一接入点, 与所述站点关联, 当接收到所述站点的请求发送消息时, 根 据所述站点分配的序列号返回第一允许发送消息,或发送请求发送消息邀请所 述站点接入信道,所述第一允许发送消息用于所述第一接入点允许所述站点接 入信道并指示所述第一接入点工作区域内的其他站点设置自身的网络分配矢 量;
第二接入点,位于所述站点的工作区域内, 当所述站点和所述第一接入点 确认通过所述第一接入点接入信道时,根据所述站点分配的序列号返回第二允 许发送消息,所述第二允许发送消息用于指示所述第二接入点以及位于所述第 二接入点工作区域内的其他站点分别设置自身的网络分配矢量,所述网络分配 矢量用于配置设备静默的时间。
实施本发明实施例, 具有如下有益效果:
所述站点在和所述第一接入点确认通过所述第一接入点接入信道之后,并 不会立即接入信道, 进行数据通信,还必须接收到其他接入点返回的允许发送 消息,让所述站点工作区域内的其他接入点及各个接入点下的站点都了解情况 后, 再接入信道, 进行数据通信, 从而避免了各个设备之间的通信干扰和时间 沖突, 降低了系统功耗, 确保了通信的正常进行。 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 例中所需要使用的附图作筒单地介绍,显而易见地, 下面描述中的附图仅仅是 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 OBSS系统的场景示意图;
图 2为本发明数据通信方法的第一实施例的流程示意图;
图 3为本发明数据通信方法的第二实施例的流程示意图;
图 4为本发明数据通信方法的第三实施例的流程示意图;
图 5为本发明数据通信方法的第四实施例的流程示意图;
图 6为本发明数据通信方法的第五实施例的流程示意图;
图 7为本发明站点的第一实施例的组成示意图;
图 8为本发明站点的第二实施例的组成示意图;
图 9为本发明实施例系统的组成示意图。 具体实施方式
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清 楚、 完整地描述, 显然, 所描述的实施例仅仅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作出创造 性劳动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。
请参照图 2, 为本发明数据通信方法的第一实施例的流程示意图, 在本实 施例中, 所述方法包括以下步骤:
S201 , 站点发送序列号到所述站点工作区域内的接入点。
其中, 所述序列号用于指示各个接入点应答所述站点的顺序。
具体地,在 OBSS系统中, 站点的工作区域内至少存在已关联的第一接入 点和未关联的第二接入点, 若站点广播消息时, 没有预先为各个接入点分配序 列号, 则可能造成两个甚至更多的接入点在同一时间返回允许发送消息,从而 导致信息沖突, 最终通信失败, 因此, 站点可预先为各个接入点分配序列号并 依此发送给各个接入点。一般地,所述第一接入点可作为初始接入点分配位于 首位的序号 1。 其他接入点可参照距离、 干扰或其他因素依此分配或随机分配 均可。
5202,当所述站点和已关联的第一接入点确认通过所述第一接入点接入信 道时,接收所述站点工作区域内的其他接入点根据所述序列号依次返回的允许 发送消息。
具体地, 所述站点可通过主动发起请求发送消息来接入信道,也可以被动 接收所述第一接入点发送的请求发送消息来进行信道接入以及数据通信。但是, 不管是主动或被动的方式尝试通过所述第一接入点接入信道进行数据通信,为 了避免 OBSS系统中可能产生的无用功耗、通信干扰, 所述站点都必须在接收 其他接入点返回的允许发送消息之后, 才可以接入信道, 此时, 其他接入点以 及各个接入点下的站点都了解到了所述站点正在接入信道, 进行数据通信, 因 此可在一段时间内保持静默,从而避免无用功耗的增加, 减少了对所述站点的 干扰。
其中,所述其他接入点返回的允许发送消息中可以包含所述其他接入点允 许所述站点占用信道的时长信息。
在所述其他接入点返回的允许发送消息中携带了网络分配矢量( Network Allocation Vector,筒称 NAV ),通过 NAV即可以筒单的配置设备的静默时间。
5203,所述站点通过所述第一接入点接入信道,与所述第一接入点进行数 据通信。
在所述站点收到所述其他接入点返回的允许发送消息之后,此时所述站点 通过所述第一接入点接入信道, 将不会再有其他接入点给所述站点发送消息, 也不会再有其他站点给所述第一接入点发送消息,从而避免了在通信的沖突和 干扰, 减少了整个系统无用功耗的产生。
在本实施例中,所述站点在和所述第一接入点确认通过所述第一接入点接 入信道之后, 并不会立即接入信道, 进行数据通信, 还必须接收到其他接入点 返回的允许发送消息,让所述站点工作区域内的其他接入点及各个接入点下的 站点都了解情况后, 再接入信道, 进行数据通信, 从而避免了各个设备之间的 通信干扰和时间沖突, 降低了系统功耗, 确保了通信的正常进行。 需要说明的是, 在本发明实施例中, 可以采用现有的 RTS/CTS交互来确 定站点或接入点的状态, 并建立通路, 实现数据通信, 当然, 也可以采用其他 的信息来进行交互, 只需要确保站点发出的信息可以携带第一接入点的地址, 利于其他接入点在收到信息时返回相应的响应消息并设置自身和对应区域内 的站点静默即可。
请参照图 3 , 为本发明数据通信方法的第二实施例的流程示意图, 在本实 施例中, 所述方法包括以下步骤:
S301 , 站点发送序列号到所述站点工作区域内的接入点。
其中, 所述序列号用于指示各个接入点应答所述站点的顺序。
S302,所述站点广播请求发送消息,向已关联的第一接入点请求接入信道。 具体地, 所述站点可主动广播请求发送消息, 当然请求发送消息也可以由 重新配置的其他消息替代, 只需要消息中携带所述第一接入点的地址, 利于所 述第一接入点和其他接入点分别返回响应消息即可。
S303 ,所述站点接收所述第一接入点根据所述序列号返回的第一允许发送 消息,再接收所述站点工作区域内的其他接入点根据所述序列号依次返回的允 许发送消息。
具体地, 在所述站点主动广播请求发送消息, 发起接入请求时, 所述第一 接入点的序列号位于首位, 其将首先返回第一允许发送消息,从而和所述站点 确认后续通过所述第一接入点接入信道。然后其他接入点再根据所述序列号依 次返回允许发送消息。
其中, 所述其他接入点至少包括第二接入点, 所述第一允许发送消息用于 所述第一接入点允许所述站点接入信道并指示所述第一接入点工作区域内的 其他站点设置自身的网络分配矢量,所述第二接入点返回的允许发送消息为第 二允许发送消息,所述第二允许发送消息用于指示所述第二接入点以及位于所 述第二接入点工作区域内的其他站点分别设置自身的网络分配矢量,所述网络 分配矢量用于配置设备静默的时间。
所述第一允许发送消息及其他接入点返回的允许发送消息也可以由重新 配置的其他消息替代, 只需要这些消息中可携带 NAV即可。
优选地,所述其他接入点返回允许发送消息的时间可以根据各个接入点对 应的序列号确定。 例如, 所述其他接入点可在等待:
2*(N+l)*SIFS+CTS_t+N*CTS_t+2*(N+l)*PHY-delay
的时间之后, 返回允许发送消息。 其中, N为接入点对应的序列号且 N大于 或等于 0, SIFS为短帧间距, 0^_1为 CTS应答时长, PHY_delay为物理层传 输时延。
S304,所述站点通过所述第一接入点接入信道,与所述第一接入点进行数 据通信。
请参照图 4, 为本发明数据通信方法的第三实施例的流程示意图, 在本实 施例中, 所述方法包括以下步骤:
S401 , 站点发送序列号到所述站点工作区域内的接入点。
其中, 所述序列号用于指示各个接入点应答所述站点的顺序。
S402,所述站点接收所述第一接入点的请求发送消息,广播允许发送消息。 具体地,所述站点还可以通过被动接收所述第一接入点的邀请,接入信道。 只需要在接收到所述第一接入点的请求发送消息时, 广播允许发送消息, 即可 以与所述第一接入点完成确认的过程。
需要说明的是, 此处的请求发送消息也可以由重新配置的其他消息替代, 只需要确保携带所述站点的地址信息即可;所述允许发送消息也可以由重新配 置的其他消息替代, 只需要携带所述第一接入点的地址信息和 NAV即可, 以 便其他接入点在接收到不属于自己的消息时, 广播消息并设置 NAV。
S403,所述站点接收所述站点工作区域内的其他接入点根据所述序列号依 次返回的允许发送消息。
所述其他接入点至少包括第二接入点,所述第二接入点返回的允许发送消 息为第二允许发送消息,所述第二允许发送消息用于指示所述第二接入点以及 位于所述第二接入点工作区域内的其他站点分别设置自身的网络分配矢量,所 述网络分配矢量用于配置设备静默的时间。
当所述其他接入点接收到不属于自己的消息时,便会根据所述序列号依次 返回允许发送消息, 所述允许发送消息中携带 NAV, 以便所述其他接入点及 所述其他接入点下的站点在一段时间内保持静默。
S404,所述站点通过所述第一接入点接入信道,与所述第一接入点进行数 据通信。 请参照图 5 , 为本发明数据通信方法的第四实施例的流程示意图, 在本实 施例中, 所述方法包括以下步骤:
5501 , 站点发送序列号到所述站点工作区域内的接入点。
5502,所述站点广播请求发送消息,向已关联的第一接入点请求接入信道。 S503 ,所述站点接收所述第一接入点根据所述序列号返回的第一允许发送 消息。
5504,所述站点广播确认消息以便所述其他接入点接收到所述确认消息后 根据所述序列号依次返回允许发送消息。
在所述站点接收到所述第一接入点返回的第一允许发送消息之后,可以广 播一个确认消息,通知工作区域内的其他接入点, 所述站点已收到第一接入点 的确认, 所述其他接入点可开始依次返回允许发送消息。
5505 ,所述站点接收所述站点工作区域内的其他接入点根据所述序列号依 次返回的允许发送消息。
5506,所述站点通过所述第一接入点接入信道,与所述第一接入点进行数 据通信。
在本实施例中, 所述站点在接收到第一接入点的第一允许发送消息时, 广 播确认消息, 可以缩短其他接入点返回允许发送消息的时间,从而提高了整体 的通信效率。
请参照图 6, 为本发明数据通信方法的第五实施例的流程示意图, 在本实 施例中, 所述方法包括以下步骤:
5601 , 站点发送序列号到所述站点工作区域内的接入点。
5602 ,若所述站点和已关联的第一接入点确认通过所述第一接入点接入信 道,在预设时间内未接收到所述其他接入点返回的允许发送消息时, 则判定信 道繁忙, 无法进行数据通信。
S603 ,所述站点发送取消消息至所述第一接入点, 以便所述第一接入点释 放为所述站点预留的资源。
此处的资源可以是所述第一接入点为所述站点预留的信道资源或其他资 源。当所述站点已经确认无法通信时,通过发送取消消息可以尽快的释放资源, 以便于其他站点的使用, 从而提高了系统资源的利用效率。 请参照图 7, 为本发明站点的第一实施例的流程示意图, 在本实施例中, 所述站点包括:
发送单元 100, 用于发送序列号到所述站点工作区域内的接入点, 所述序 列号用于指示各个接入点应答所述站点的顺序;
接收单元 200, 用于当所述站点和已关联的第一接入点确认通过所述第一 接入点接入信道时,接收所述站点工作区域内的其他接入点根据所述序列号依 次返回的允许发送消息;
接入单元 300, 用于通过所述第一接入点接入信道, 与所述第一接入点进 行数据通信。
所述发送单元 100具体用于广播请求发送消息,向已关联的第一接入点请 求接入信道;
所述接收单元 200具体用于接收所述第一接入点根据所述序列号返回的 第一允许发送消息,再接收所述站点工作区域内的其他接入点根据所述序列号 依次返回的允许发送消息, 所述其他接入点至少包括第二接入点, 所述第一允 许发送消息用于所述第一接入点允许所述站点接入信道并指示所述第一接入 点工作区域内的其他站点设置自身的网络分配矢量,所述第二接入点返回的允 许发送消息为第二允许发送消息,所述第二允许发送消息用于指示所述第二接 入点以及位于所述第二接入点工作区域内的其他站点分别设置自身的网络分 配矢量, 所述网络分配矢量用于配置设备静默的时间。
或者, 所述接收单元 200具体用于接收所述第一接入点的请求发送消息; 以及接收所述站点工作区域内的其他接入点根据所述序列号依次返回的允许 发送消息, 所述其他接入点至少包括第二接入点, 所述第二接入点返回的允许 发送消息为第二允许发送消息,所述第二允许发送消息用于指示所述第二接入 点以及位于所述第二接入点工作区域内的其他站点分别设置自身的网络分配 矢量, 所述网络分配矢量用于配置设备静默的时间;
所述发送单元 100还用于在所述接收单元接收到所述第一接入点的请求 发送消息后, 广播允许发送消息。
在所述接收单元 200接收所述第一接入点返回的第一允许发送消息之后, 所述发送单元 100还用于广播确认消息以便所述其他接入点接收到所述确认 消息后根据所述序列号依次返回允许发送消息。 若所述站点和已关联的第一接入点确认通过所述第一接入点接入信道,在 预设时间内所述接收单元 200 未接收到所述其他接入点返回的允许发送消息 时, 则判定信道繁忙, 无法进行数据通信。
在所述接收单元 200判定信道繁忙,无法进行数据通信之后, 所述发送单 元 100还用于发送取消消息至所述第一接入点,以便所述第一接入点释放为所 述站点预留的资源。
所述其他接入点返回的允许发送消息中包含所述其他接入点允许所述站 点占用信道的时长信息。
需要说明的是, 以上发送单元、接收单元以及接入单元可以独立存在, 也 可以集成设置,且以上站点实施例中发送单元、接收单元或接入单元可以以硬 件的形式独立于站点的处理器单独设置, 且设置形式可以是微处理器的形式; 也可以以硬件形式内嵌于站点的处理器中,还可以以软件形式存储于站点的存 储器中, 以便于站点的处理器调用执行以上发送单元、接收单元或接入单元对 应的操作。
例如, 在本发明站点的第一实施例 (图 7 所示的实施例) 中, 接入单元
300可以为站点的处理器, 而发送单元 100和接收单元 200的功能可以内嵌于 该处理器中,也可以独立于处理器单独设置,也可以以软件的形式存储于存储 器中, 由处理器调用实现其功能。 当然, 发送单元 100和接收单元 200可以集 成设置, 也可以独立设置, 或者还可以作为站点的接口电路, 独立设置或集成 设置。本发明实施例不做任何限制。以上处理器可以为中央处理单元( CPU )、 微处理器、 单片机等。
请参照图 8, 为本发明站点的第二实施例的组成示意图, 在本实施例中, 所述站点包括: 接口电路 400、 存储器 500以及与所述接口电路 400和存储器 500相连接的处理器 600。其中存储器 500用于存储一组程序代码,处理器 600 用于调用存储器 500中存储的程序代码,执行本发明数据通信方法的第一至第 五任一实施例中所述的操作。
请参照图 9, 为本发明实施例系统的组成示意图, 在本实施例中, 所述系 统包括:
如本发明站点的第一至第二任一实施例中所述的站点 110; 第一接入点 120, 与所述站点 110关联, 当接收到所述站点 110的请求发 送消息时,根据所述站点 110分配的序列号返回第一允许发送消息, 或发送请 求发送消息邀请所述站点 110接入信道,所述第一允许发送消息用于所述第一 接入点 120允许所述站点 110接入信道并指示所述第一接入点 120工作区域内 的其他站点设置自身的网络分配矢量;
第二接入点 130, 位于所述站点 110的工作区域内, 当所述站点 110和所 述第一接入点 120确认通过所述第一接入点 120接入信道时, 根据所述站点 110分配的序列号返回第二允许发送消息, 所述第二允许发送消息用于指示所 述第二接入点 130以及位于所述第二接入点 130工作区域内的其他站点分别设 置自身的网络分配矢量, 所述网络分配矢量用于配置设备静默的时间。
需要说明的是, 本说明书中的各个实施例均采用递进的方式描述,每个实 施例重点说明的都是与其它实施例的不同之处,各个实施例之间相同相似的部 分互相参见即可。 对于装置实施例而言, 由于其与方法实施例基本相似, 所以 描述的比较筒单, 相关之处参见方法实施例的部分说明即可。
通过上述实施例的描述, 本发明具有以下优点:
所述站点在和所述第一接入点确认通过所述第一接入点接入信道之后,并 不会立即接入信道, 进行数据通信,还必须接收到其他接入点返回的允许发送 消息,让所述站点工作区域内的其他接入点及各个接入点下的站点都了解情况 后, 再接入信道, 进行数据通信, 从而避免了各个设备之间的通信干扰和时间 沖突, 降低了系统功耗, 确保了通信的正常进行。
本领域普通技术人员可以理解:实现上述方法实施例的全部或部分步骤可 以通过程序指令相关的硬件来完成,前述的程序可以存储于一计算机可读取存 储介质中, 该程序在执行时, 执行包括上述方法实施例的步骤; 而前述的存储 介质包括: ROM、 RAM, 磁碟或者光盘等各种可以存储程序代码的介质。
以上对本发明实施例所提供的一种数据通信方法、站点及系统进行了详细 施例的说明只是用于帮助理解本发明的方法及其核心思想; 同时,对于本领域 的一般技术人员,依据本发明的思想,在具体实施方式及应用范围上均会有改 变之处, 综上所述, 本说明书内容不应理解为对本发明的限制。

Claims

权 利 要 求
1、 一种数据通信的方法, 其特征在于, 包括:
站点发送序列号到所述站点工作区域内的接入点,所述序列号用于指示各 个接入点应答所述站点的顺序;
当所述站点和已关联的第一接入点确认通过所述第一接入点接入信道时, 接收所述站点工作区域内的其他接入点根据所述序列号依次返回的允许发送 消息;
所述站点通过所述第一接入点接入信道,与所述第一接入点进行数据通信。
2、 如权利要求 1所述的方法, 其特征在于, 所述当所述站点和已关联的 第一接入点确认通过所述第一接入点接入信道时,接收所述站点工作区域内的 其他接入点根据所述序列号依次返回的允许发送消息, 包括:
所述站点广播请求发送消息, 向已关联的第一接入点请求接入信道; 所述站点接收所述第一接入点根据所述序列号返回的第一允许发送消息, 再接收所述站点工作区域内的其他接入点根据所述序列号依次返回的允许发 送消息, 所述其他接入点至少包括第二接入点, 所述第一允许发送消息用于所 述第一接入点允许所述站点接入信道并指示所述第一接入点工作区域内的其 他站点设置自身的网络分配矢量,所述第二接入点返回的允许发送消息为第二 允许发送消息,所述第二允许发送消息用于指示所述第二接入点以及位于所述 第二接入点工作区域内的其他站点分别设置自身的网络分配矢量,所述网络分 配矢量用于配置设备静默的时间。
3、 如权利要求 1所述的方法, 其特征在于, 所述当所述站点和已关联的 第一接入点确认通过所述第一接入点接入信道时,接收所述站点工作区域内的 其他接入点根据所述序列号依次返回的允许发送消息, 包括:
所述站点接收所述第一接入点的请求发送消息, 广播允许发送消息; 所述站点接收所述站点工作区域内的其他接入点根据所述序列号依次返 回的允许发送消息, 所述其他接入点至少包括第二接入点, 所述第二接入点返 回的允许发送消息为第二允许发送消息,所述第二允许发送消息用于指示所述 第二接入点以及位于所述第二接入点工作区域内的其他站点分别设置自身的 网络分配矢量, 所述网络分配矢量用于配置设备静默的时间。
4、 如权利要求 1-3任一项所述的方法, 其特征在于, 所述其他接入点返 回允许发送消息的时间根据各个接入点对应的序列号确定。
5、 如权利要求 2所述的方法, 其特征在于, 在所述站点接收所述第一接 入点返回的第一允许发送消息之后, 还包括:
所述站点广播确认消息以便所述其他接入点接收到所述确认消息后根据 所述序列号依次返回允许发送消息。
6、 如权利要求 1-5任一项所述的方法, 其特征在于, 若所述站点和已关 联的第一接入点确认通过所述第一接入点接入信道,在预设时间内未接收到所 述其他接入点返回的允许发送消息时, 则判定信道繁忙, 无法进行数据通信。
7、 如权利要求 6所述的方法, 其特征在于, 在所述站点判定信道繁忙, 无法进行数据通信之后, 还包括:
所述站点发送取消消息至所述第一接入点,以便所述第一接入点释放为所 述站点预留的资源。
8、 如权利要求 1-7任一项所述的方法, 其特征在于, 所述其他接入点返 回的允许发送消息中包含所述其他接入点允许所述站点占用信道的时长信息。
9、 一种站点, 其特征在于, 包括:
发送单元, 用于发送序列号到所述站点工作区域内的接入点, 所述序列号 用于指示各个接入点应答所述站点的顺序;
接收单元,用于当所述站点和已关联的第一接入点确认通过所述第一接入 点接入信道时,接收所述站点工作区域内的其他接入点根据所述序列号依次返 回的允许发送消息; 接入单元, 用于通过所述第一接入点接入信道, 与所述第一接入点进行数 据通信。
10、 如权利要求 9所述的站点, 其特征在于, 所述发送单元具体用于广播 请求发送消息, 向已关联的第一接入点请求接入信道;
所述接收单元具体用于接收所述第一接入点根据所述序列号返回的第一 允许发送消息,再接收所述站点工作区域内的其他接入点根据所述序列号依次 返回的允许发送消息, 所述其他接入点至少包括第二接入点, 所述第一允许发 送消息用于所述第一接入点允许所述站点接入信道并指示所述第一接入点工 作区域内的其他站点设置自身的网络分配矢量,所述第二接入点返回的允许发 送消息为第二允许发送消息,所述第二允许发送消息用于指示所述第二接入点 以及位于所述第二接入点工作区域内的其他站点分别设置自身的网络分配矢 量, 所述网络分配矢量用于配置设备静默的时间。
11、 如权利要求 9所述的站点, 其特征在于, 所述接收单元具体用于接收 所述第一接入点的请求发送消息;以及接收所述站点工作区域内的其他接入点 根据所述序列号依次返回的允许发送消息,所述其他接入点至少包括第二接入 点, 所述第二接入点返回的允许发送消息为第二允许发送消息, 所述第二允许 发送消息用于指示所述第二接入点以及位于所述第二接入点工作区域内的其 他站点分别设置自身的网络分配矢量,所述网络分配矢量用于配置设备静默的 时间;
所述发送单元还用于在所述接收单元接收到所述第一接入点的请求发送 消息后, 广播允许发送消息。
12、 如权利要求 9-11任一项所述的站点, 其特征在于, 所述其他接入点 返回允许发送消息的时间根据各个接入点对应的序列号确定。
13、 如权利要求 10所述的站点, 其特征在于, 在所述接收单元接收所述 第一接入点返回的第一允许发送消息之后,所述发送单元还用于广播确认消息 以便所述其他接入点接收到所述确认消息后根据所述序列号依次返回允许发 送消息。
14、 如权利要求 9-13任一项所述的站点, 其特征在于, 若所述站点和已 关联的第一接入点确认通过所述第一接入点接入信道,在预设时间内所述接收 单元未接收到所述其他接入点返回的允许发送消息时, 则判定信道繁忙,无法 进行数据通信。
15、 如权利要求 14所述的站点, 其特征在于, 在所述接收单元判定信道 繁忙, 无法进行数据通信之后, 所述发送单元还用于发送取消消息至所述第一 接入点, 以便所述第一接入点释放为所述站点预留的资源。
16、 如权利要求 9-15任一项所述的站点, 其特征在于, 所述其他接入点 返回的允许发送消息中包含所述其他接入点允许所述站点占用信道的时长信
17、 一种计算机程序产品, 包括计算机可读介质, 所述计算机可读介质包 括一组程序代码, 用于执行如权利要求 1-8任一项所述的方法。
18、 一种系统, 其特征在于, 包括:
如权利要求 9-16任一项所述的站点;
第一接入点, 与所述站点关联, 当接收到所述站点的请求发送消息时, 根 据所述站点分配的序列号返回第一允许发送消息,或发送请求发送消息邀请所 述站点接入信道,所述第一允许发送消息用于所述第一接入点允许所述站点接 入信道并指示所述第一接入点工作区域内的其他站点设置自身的网络分配矢 量;
第二接入点,位于所述站点的工作区域内, 当所述站点和所述第一接入点 确认通过所述第一接入点接入信道时,根据所述站点分配的序列号返回第二允 许发送消息,所述第二允许发送消息用于指示所述第二接入点以及位于所述第 二接入点工作区域内的其他站点分别设置自身的网络分配矢量,所述网络分配 矢量用于配置设备静默的时间。
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CN103250461A (zh) * 2010-12-13 2013-08-14 思科技术公司 用于多用户传输的介质预留技术

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CN102387535A (zh) * 2010-09-03 2012-03-21 中兴通讯股份有限公司 允许发送cts回复方法及系统
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