CN100505657C - Method for implementing switching between connections in WLAN - Google Patents

Method for implementing switching between connections in WLAN Download PDF

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Publication number
CN100505657C
CN100505657C CN 200410028151 CN200410028151A CN100505657C CN 100505657 C CN100505657 C CN 100505657C CN 200410028151 CN200410028151 CN 200410028151 CN 200410028151 A CN200410028151 A CN 200410028151A CN 100505657 C CN100505657 C CN 100505657C
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station
access point
site
access
indication message
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CN 200410028151
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Chinese (zh)
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CN1722683A (en
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吴少华
波 孙
峰 李
马凤国
音 高
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中兴通讯股份有限公司
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Abstract

本发明公开了无线局域网中实现切换联接的方法,在站点与接入点按照现有的无线局域网协议正在建立联接和已经建立联接的不同情况下,通过利用转交指示消息进行不同的切换联接过程,使得站点在ESS网络中的切换目标明确,切换效率高,并且站点在ESS网络中的被动切换过程不需要用户参与,有效快速得指导用户接入其他建议接入点,提高了用户接入质量,同时减少了频繁切换现象,使ESS网络实施站点接入优化时效率更高。 The present invention discloses a method implemented in wireless local area network switch coupled, in accordance with the access point station existing wireless local area network protocol connection being established under different conditions have been established and coupled by different handover indication message transmitted using the coupling process, ESS switch enables the site to target the network of clear, high switching efficiency, and the site passive switching process in ESS network does not require user participation, effectively guide the user to quickly get access to other proposals access points, improve the quality of user access, while reducing the switching frequency, thus making the embodiment more efficient ESS network station when the access optimization.

Description

无线局域网中实现切换联^妄的方法 ^ Jump associated method for switching wireless LAN implemented

技术领域 FIELD

本发明涉及通信领域中的无线局域网系统,尤其涉及无线局域网内切换联接的方法。 The present invention relates to the field of wireless local area network communication system, and particularly to a method of switching the wireless LAN connection.

背景技术 Background technique

WLAN(无线局域网)是指应用无线通信技术将计算机设备互联起来,构成可以互相通信和实现资源共享的网络体系。 WLAN (Wireless Local Area Network) is a wireless communication technology interconnected computer devices, communicate with each other and constituting the resource sharing network system. 在WLAN网络环境中, 一个ESS (扩展服务组)是由多个BSS (基本服务组)通过分布式系统互连組成,这个分布式系统可以是有线的也可以是无线的。 In WLAN network environment, a the ESS (Extended Service Set) is composed of a plurality of BSS (Basic Service Set) are interconnected by a distributed system composed of the distributed system may be wired or may be wireless. 接入点起到了扩展服务组系统内每个单独基本服务组接口的作用。 Access point acts as the interface for each individual basic service set of the extended set of system services. 站点通过扩展ESSID (服务组识别号)选择接入点,同一个ESS内不同的接入点可以通过BSSID (基本服务组识别号)来区分,或者按照根据其他原则来区分,例如信号强度。 Site by extending the ESSID (service set ID) select an access point, a different within the same ESS access point may be distinguished by the BSSID of (basic service set identification number), or according to distinguish between different basis, such as signal strength. 如果站点需要加入到一个ESS网络,在该站点与ESS网络中的某个接入点建立通信前,必须先通过该接入点的认证,再经过与该接入点的联接过程,才能开始正常的通信。 If the site needs to be added before the ESS to a network, an access point at the site and the ESS network to establish communication, must be certified by the access point, and then through the connection process with the access point, to start normal Communication. 某一时刻站点只能与一个接入点建立联接。 Site at a time can only establish a connection with an access point. 当站点需要在保持现有联接的同时改变某些联接属性时,就可以发起再次联接过程。 When the site needs to change some join properties while maintaining the existing connection, you can initiate a connection procedure again. 例如在漫游和切换过程中,再次联接过程就可以告知ESS网络,站点正从一个接入点移动到另一个接入点。 E.g. roaming and handover procedure, the coupling procedure again ESS can inform network station is moving from one access point to another access point. 如果需要中止现有的联接,联接双方中的任一方均可发送取消联接通知,而另一方也不需响应。 If you need to abort an existing link, any of the two sides join in the party may send a notice to cancel the coupling, and the other also without response.

在无线局域网中,站点对接收到的来自接入点的管理帧进行判断,如果所迷管理帧是取消联接帧,则站点断开与接入点的链路联接,并将链路状态以某种方式显示给用户,由用户选择是否进行以及如何进行新的联接过程。 In the wireless local area network, a management frame from the access point determines the received station, if the lost frame is a management frame to cancel the coupling, the coupling site broken link with an access point, and a link state ways displayed to the user, the user choose whether and how the new connection process. 如果站点由于某种原因被接.入点拒绝接入而断开联接,则需要用户决定,或 If for some reason access site. Denying access point and decoupled, the user needs to decide, or

者按照某种策略判断是否需要重新联接到ESS网络中,并且选择新的接入占 According to a certain policy is determined by the need to re ESS coupled to the network, and selects a new access account

i "、 o i ", o

目前的无线局域网协议并没有规定如何选择新的接入点,也没有为选择新接入点提供信息,使得新接入点的选择随机性很大。 The current wireless local area network protocol does not specify how to select a new access point, nor does it provide information for the selection of a new access point, so as to select a new random access points greatly. 对于一个进行接入和 And an access for a

资源优化的ESS网络而言,接入的随机性加大了优化的难度,不利于ESS网络负栽的均衡。 For network ESS resource optimization, increased the difficulty of random access optimization, ESS network is not conducive to plant negative balance. 另外,接入的随机性也使得站点在ESS网络内的切换效率降低。 Further, the random access site makes ESS switching efficiency over the network is reduced.

发明内容 SUMMARY

本发明解决的技术问题是,站点进行切换联接时,获得足够的信息决定新的接入点,站点自动与新的接入点建立联接,减少站点与ESS网络建立联接过程中用户的参与程度,提高站点在ESS网络中不同接入点间切换的效率以及站点的切换联接质量。 The present invention solves the technical problem, the coupling station to perform handover, to obtain sufficient information to determine the new access point, the station is automatically establish a connection with the new access point, to reduce the ESS station and the network to establish the user participation during the coupling, improving the quality of the coupling site in the ESS switching network handover between different access points, and the efficiency of the site.

本发明所述方法应用于包含至少两个接入点和至少一个站点的无限局域网。 The method of the present invention is applied comprises at least two wireless LAN access points and the at least one station. 具体包4舌以下步骤: DETAILED packet tongue 4 steps:

(一)站点与接入点按照现有的无线局域网协议已经建立联接的情况下,包括以下步骤: In the case (a) in accordance with the conventional station and the access point of wireless local area network protocol connection has been established, comprising the steps of:

1、 站点得到足够的信息后,向接入点发送认证请求; 1, the sites to give enough information, send an authentication request to the access point;

2、 接入点接收后,给站点发送认证响应,若站点通过认证则给站点发送认证成功响应,则执行步骤3,若站点未通过认证则给站点发送认证失败响应,则"^丸行步骤1; 2, after the access point receives, sends an authentication response to the station, if the station is authenticated to the station sends an authentication success response, step 3 is performed, if the site is not transmitting the authentication failure response to the station is authenticated, "^ pellet row step 1;

3、 站点向接入点发送联接请求; 3, the coupling station sends a request to the access point;

4、 接入点根据自身情况处理后向请求联接的站点发送联接响应,允许或拒绝站点的接入,若允许站点接入则发送联接成功响应,则执行步骤5,若拒绝站点接入则发送联接失败响应,则执行步骤1; 4, the access point transmits the access according to the response itself is coupled to the processing site where the coupling request, allow or deny the site, if the site is allowed to send an access coupled success response, step 5 is performed, if the transmission is denied access to the site coupling failure response, step 1 is performed;

5、 建立联接,开始通信; 5, establish a connection, to start communication;

6、 接入点与站点建立联接后,当接入点需要中止现有的与站点已经建立的联接时,接入点拆除与站点已经建立的联接,并保存必要的链路信息, 同时构造转交指示消息,所述转交指示消息包含所述接入点建议站点进行再次联接的指示信息; 6, after the access point and the station establish a connection, when the access point needs to abort the existing connection has been established with the station when the access point and the station have established the removal of the coupling, and save the necessary link information, and configured to transmit indication message comprising said indication message transmitted to the access point information again suggested site coupled to instruction;

7、 接入点给上述站点发送转交指示消息; 7, the access point to transmit to said transmitting station indication message;

8、 站点接收到所述转交指示消息后进行识别处理,并从所述转交指示消息中提取再次联接需要的指示信息; 8, station receives the care-recognition processing indication message, and extracts information indicating the need to re-coupled from the transmit indication message;

9、 站点根据所述转交指示消息中的再次联接指示信息,向所述转交指示消息中建议的新的接入点发送指定BSSID的定向探测请求帧,并开始再次 9, according to the site retransmitted coupling instruction information message to the handover indication message proposed in the new access point sends a directed probe request frame specified BSSID and starts again

联接过程。 Coupling process.

(二)在站点与接入点按照现有的无线局域网协议正在建立联接的情况下,包括以下步骤: Case (ii) in the site with the access point is established in accordance with a conventional coupling protocol wireless local area network, comprising the steps of:

1、 站点得到足够的信息后,向接入点发送认证请求; 1, the sites to give enough information, send an authentication request to the access point;

2、 接入点接收后,给站点发送认证响应,若站点通过认证则给站点发送认证成功响应,则执行步骤3,若站点未通过认证则给站点发送认证失败响应,则执行步骤1; 2, after the access point receives, sends an authentication response to the station, if the station is authenticated to the station sends an authentication success response, step 3 is performed, if the station to the station sends an authentication failure response is not authenticated, the step 1 is performed;

3、 站点给接入点发送联接请求; 3, the station coupled to the access point sends a request;

4、 接入点根据自身情况处理后向请求联接的站点发送联接响应,允许或拒绝站点的接入,若允许站点接入则发送联接成功响应,则接入点与站点建立联接,开始正常通信,若拒绝站点接入则构造转交指示消息,所述转交指示消息包含所述接入点建议站点进行再次联接的指示信息,并执行步骤5; 4, the access point transmits the access according to the response itself is coupled to the processing site where the coupling request, allow or deny the site, if the site is allowed to send an access coupled success response, the access point and the station establish a connection, normal communication start If denied access to the site is configured to transmit an indication message comprising said indication message transmitted to the access point information again suggested site coupled to instruction and step 5;

5 、接入点向正请求联接的站点发送转交指示消息; 6、站点接收到所述转交指示消息后进行识别处理,并从所述转交指示消息中提取再次联接需要的指示信息;7、站点根据所述转交指示消息中的再次联接指示信息,向所述转交指示消息中建议的新的接入点,发送指定BSSID的定向探测请求帧,并开始再次联接过程。 5, the access point sends to the station is requesting a care-coupled indication message; 6, station receives the handover indication message recognition processing, and extracts information indicating the re-transmitted from the coupling required indication message; 7, site the indication message transmitted to the coupled indication information again, a new access point transmit indication message to the recommendation, transmission of the specified BSSID directed probe request frame, the coupling process and starts again.

本发明通过利用转交指示消息进行切换联接的方法,使得站点在ESS网络中的切换目标明确,切换效率高;并且站点在ESS网络中的被动切换过程不需要用户参与,有效快速得指导用户接入其他建议接入点,提高了用户接入质量;同时减少了频繁切换现象,使ESS网络实施站点接入优化时效率更 The present invention is coupled to the switching indication message transmitted by using a method, such that the handover target site in the network ESS clear, high switching efficiency; site and passive handover procedure ESS network not require user intervention, effectively and quickly guide the user to obtain access other proposals access points, to improve the quality of user access; frequent switching phenomenon while reducing the embodiment when ESS station access network more efficient optimization

附图说明 BRIEF DESCRIPTION

图1是本发明的优选实施例的应用环境图; 图2是解除联接转交指示帧帧结构示意图; 图3是再次联接响应转交指示帧帧结构示意图; FIG. 1 is a block diagram of the preferred embodiment of the present invention; FIG. 2 is a schematic view of the coupling is released indicates a frame structure transmitted frame; FIG. 3 is a schematic view of the coupling again indicates the frame transmitted in response to a frame structure;

图4是在站点与接入点建立连接后利用转交指示消息实现切换联接的流程图; FIG 4 is a flowchart of the establishment of the connection instruction message transmitted implemented in the switching station coupled with an access point;

图5是在站点与接入点建立联接时利用转交指示消息实现切换联接的 FIG 5 is established using the indication is transmitted in connection with the access point station switching message achieve coupling

具体实施方式 Detailed ways

下面结合附图和实施例对本发明作进一步详细说明。 The present invention is described in further detail below in conjunction with the accompanying drawings and embodiments. 图1是本发明的优选实施例的应用环境图。 FIG 1 is a diagram of one preferred embodiment of the present invention.

101为扩展服务组, 一个ESS是由多个BSS通过分布式系统互连组成。 For the extended service set 101, it is composed of a plurality of ESS BSS interconnected by a distributed system. 102为分布式系统,相关基本业务组可通过分布式系统构成一个扩展服务组,分布式系统可以是有线的,也可以是无线的。 102 as a distributed system, related to a basic service set extension can be constituted by a set of distributed service system, distributed system may be wired or may be wireless.

1(n和l(M为BSS,指一个由单一同等功能控制的无线工作站集合。在 A set of (n and l (M is a BSS, means a functional equivalent controlled by a single wireless station 1. In

流程图。 flow chart. BSS中可以采用基础架构模式和自组网模式。 BSS can be used in infrastructure mode and ad hoc network mode.

105和106为AP (Access Point,接入点),每个AP可通过基本业务组识别号(BSSID)来进行识别。 105 and 106 of AP (Access Point, AP), each AP can be identified by a basic service set identifier (BSSID). 一个AP可以接入多个站点。 AP may access a plurality of sites.

107、 108、 109、 110、 111和112为STA (Station,站点),每个站点与某个AP建立通信前,必须先通过该AP的认证,然后经过与该AP的联接过程,才能开始正常的通信。 107, 108, 109, 110, 111 and 112 to STA (Station, site), each site prior to establishing communication with an AP, the AP must pass authentication, then subjected to the coupling procedure with the AP, to start the normal Communication. 某一时刻站点只能与一个AP建立联接。 Site at a time can only establish a connection with the AP. 当站点需要在保持现有联接的同时改变某些联接属性时,就可以发起再次联接过程。 When the site needs to change some join properties while maintaining the existing connection, you can initiate a connection procedure again. 如果需要中止现有的联接,联接双方中的任一方均可发送本发明描述的取消联接消息。 If you need to abort the existing connection, according to any one of the two sides of the coupling can be coupled to message transmission cancellation of the present invention described herein.

11 3为当终止现有联接时,无论是STA发起的还是AP发起的,AP给STA 发送本发明描述的转交指示消息,通知STA断开联接,在该消息中附加某些额外信息,比如建议站点接入的其他接入点的唯一标志符。 113 to when to terminate an existing connection, or whether it is initiated by AP STA initiated, the AP transmits to STA transmit indication message described in the present invention, the STA decoupling notification, certain additional information in the additional message, such as recommendations the only other access point identifier of site access.

114为STA接收到所述扩充的转交指示消息并处理后,对AP建议的新的AP发出再次联接请求。 After the STA 114 receives the indication message and a care-expansion processing, the coupling again issued a request for a new AP AP recommendations.

图2是解除联接转交指示帧帧结构示意图。 FIG 2 is a schematic view of a frame transmitted decoupled frame structure indicated.

定义为符合现有无线局域网IEEE 802. 1 1协议MAC管理帧格式的一种新的MAC'管理帧。 It is defined as a line with an existing WLAN IEEE 802. 1 1 a protocol frame format of the MAC management new MAC 'management frame. 包括MAC帧头,帧体和帧校验序列。 It includes a MAC header, a frame body and a frame check sequence. 图中,IEEE802. 1 1解除联接请求的MAC帧头是《ANSI/IEEE802. 1 1, 1999 Edi t ion》中的一部分,描述了解除联接请求管理帧的帧头结构,包括源MAC地址、目的MAC地址、控制域等。 FIG, IEEE802. 1 1 MAC header portion of the request is decoupled "ANSI / IEEE802. 1 1, 1999 Edi t ion" is described header structure decoupled request management frame includes a source MAC address, destination MAC address, control field and the like. 帧体部分包括两部分内容,原因码为2个字节,其采用协议中的保留值,保留值范围为1 0- 65535,取IO,含义为增加建议BSSID域。 The frame portion comprises two parts, the reason code is 2 bytes, a reserved value which employs protocol, retention value in the range of 10-65535, take the IO, meaning proposals to increase BSSID field. 建议BSSID域为6个字节,内容为接入点建议站点进行再次联接的建议接入点的BSSID。 Recommended BSSID field is 6 bytes, the contents of the access point BSSID again suggested sites for coupling the access point recommended. 帧校验序列(FCS)用于接收方验证该帧是否正确。 Frame check sequence (FCS) for the recipient to verify that the frame is correct.

图3是(再次)联接响应转交指示帧帧结构示意图。 FIG 3 is a (re) configuration is coupled in response schematic indication transmitted frames.

定义为符合现有无线局域网IEEE 8 02. 1 1协议MAC管理帧格式的一种新的MAC管理帧。 Is defined as a line with an existing WLAN IEEE 8 02. 1 1 MAC management frame format of a protocol of a new MAC management frame. 包括MAC帧头,帧体和帧校验序列。 It includes a MAC header, a frame body and a frame check sequence. 图中,IEEE802. 1 1解除联接请求的MAC帧头是《ANSI/IEEE802. 1 1, 1999 Edi t ion》中的一部分,描述了解除联接请求管理帧的帧头结构,包括源MAC地址、目的MAC地址、控制域等。 FIG, IEEE802. 1 1 MAC header portion of the request is decoupled "ANSI / IEEE802. 1 1, 1999 Edi t ion" is described header structure decoupled request management frame includes a source MAC address, destination MAC address, control field and the like. 帧体部分包括五部分内容,能力信息、状态码、关联ID、支持的速率、建议BSSID 其中能力信息、关联ID、支持的速率使用与原有协议相一致,状态码为2个字节,其采用协议中的保留值,保留值范围为2〜9,取2,含义为增加建议BSSID域。 The frame portion comprises five parts, the capability information, status code, association ID, supported rates, capability information, wherein the recommended BSSID, association ID, and supported rates using the original protocol consistent status code of 2 bytes which retention protocol employed, retention value in the range of 2~9, take 2, meaning proposals to increase BSSID field. 建议BSSID域为6个字节,内容为接入点建议站点进行再次联接的建议接入点的BSSID。 Recommended BSSID field is 6 bytes, the contents of the access point BSSID again suggested sites for coupling the access point recommended. 帧校验序列(FCS)用于接收方验证该帧是否正确。 Frame check sequence (FCS) for the recipient to verify that the frame is correct. 图4是在站点与接入点建立连接后利用转交指示消息实现切换联接的过程。 FIG 4 is a process of establishing connection using the implemented handover instruction message to transmit the site coupled with the access point.

401为STA得到足够的信息后,给AP1发送认证请求; 402为AP1接收后,给STA发送认证响应,若站点通过认证则给站点发 After 401 enough information to STA, sends an authentication request to AP1; AP1 402 after receiving the authentication response to the STA transmission, when the site is a site sends the authenticated

送认证成功响应,转403,若STA未通过认证则给STA发送认证失败响应, Sending the authentication success response, switch 403, then sends an authentication failure response to the STA if the STA is not authenticated,

转401; 401 rpm;

4 03为STA给API发送联接请求; Coupling the STA 403 transmits a request to the API;

404为API根据自身情况处理后向请求联接的STA发送联接响应,允许或拒绝STA的接入,若允许STA接入则发送联接成功响应,转4Q5,若拒绝STA接入则发送联接失败响应,转401; API 404 is transmitted in accordance with their situation after the processing request to the STA in response to the coupling of the coupling, allow or deny access to the STA, STA if the access grant is sent in response to a successful coupling, turn 4Q5, if denied access to the STA transmits a failure response to the coupling, 401 rpm;

405为STA与API建立联接,开始正常通信; STA 405 to establish a connection to the API, normal communication start;

406为API与STA建立联接后,由于某种原因,AP1需要中止现有的与STA已经建立的联接,则API拆除与STA已经建立的联接,并保存必要的链路信息,同时构造本发明描述的图2所示的转交指示消息,在该转交指示信息的数据域中填充AP2的BSSID; API 406 with the STA after the establishment of connection, for some reason, the conventional need for suspension AP1 coupling established with the STA, the STA API dismantling of the coupling has been established, and stores the necessary link information, and the configuration described in the present invention transmit indication message illustrated in FIG. 2, in the data field to transmit the information indicative of the BSSID of AP2 is filled;

407为API给上述STA发送转交指示消息; API 407 is transmitted to said STA sends an indication message;

408为STA接收到上述转交指示消息后进行识别处理,并从上述转交指示消息中提取AP2的BSSID信息; Recognition processing after the STA 408 receives the transmitted indication message, and extracts the BSSID information transmitted from the AP2 indication message;

409为STA根据上述转交指示消息中的再次联接指示信息,向上述转交 The STA 409 indicating information according to the indication message transmitted again coupled to the transmit

10指示消息中建议的上述新的AP2发送再次联接请求,开始再次联接过程。 10 indication message proposed AP2 transmits said new connection request again, the coupling process starts again.

图5是在站点与接入点建立联接时利用转交指示消息实现切换联接的过程。 FIG 5 is implemented using the transmitted handover indication message when the coupling site establish a connection with an access point in the process.

501为STA得到足够的信息后,给AP1发送认证请求; 502为AP1接收后,给STA发送认证响应,若STA通过认证则给STA发 After 501 enough information to STA, sends an authentication request to AP1; AP1 502 after receiving, transmitting the authentication response to the STA, STA when the STA to send the authenticated

送认证成功响应,转5 03,若STA未通过认证则给STA发送认证失败响应, Sending the authentication success response, switch 503, then sends an authentication failure response to the STA if the STA is not authenticated,

转501; 501 rpm;

5 03为STA给API发送(再次)联接请求; API to the STA 503 transmits (re) association request;

5 04为API根据自身情况处理后向请求联接的STA发送(再次)联接响应,允许或拒绝STA的接入,若允许STA接入则发送(再次)联接成功响应, 建立联接开始通信,若拒绝STA接入则构造图3所示的转交指示消息,在该转交指示信息的数据域中填充建议STA接入的AP2的BSSID; API 504 is a post-processing according to their transmission to the STA requests to join (again) in response to the coupling, allow or deny access to the STA, STA if the access grant is sent (again) coupled successful response, begins to establish a communication connection, if refused STA access indication message transmitted to the configuration shown in FIG. 3, the data field in the instruction information transmitted filled recommendations BSSID AP2 access the STA;

5 05为API给正请求联接的STA发送转交指示消息; API 505 is coupled to the STA transmits a request to transmit a positive indication message;

5 06为STA接收到上述转交指示消息后进行识别处理,并从上述转交指示消息中提取再次联接需要的指示信息即AP2的BSSID; Recognition processing after the STA 506 receives the transmitted indication message, and extracts information indicating the need to re-coupled from the transmit indication message i.e. BSSID is AP2;

5 07为STA根据上述转交指示消息中的再次联接指示信息,向AP2发送再次联接请求,并开始再次联接过程。 507 indicates information according to the indication message transmitted again coupled to the STA, sending access request again, and begins the process again coupled to AP2.

Claims (6)

1、一种无线局域网中实现切换联接的方法,在站点与接入点按照现有的无线局域网协议已经建立联接的情况下,包括以下步骤:1. 1站点得到足够的信息后,向接入点发送认证请求;1. 2接入点接收后,给站点发送认证响应,若站点通过认证则给站点发送认证成功响应,则执行步骤1.3,若站点未通过认证则给站点发送认证失败响应,则执行步骤1.1;1. 3站点向接入点发送联接请求;其特征在于,所述步骤1.3后,还包括以下步骤:1. 4接入点根据自身情况处理后向请求联接的站点发送联接响应,允许或拒绝站点的接入,若允许站点接入则发送联接成功响应,则执行步骤1.5,若拒绝站点接入则发送联接失败响应,则执行步骤1.1;1. 5建立联接,开始通信;1. 6接入点与站点建立联接后,当接入点需要中止现有的与站点已经建立的联接时,接入点拆除与站点已经 1. A method of switching a wireless LAN connection is implemented in accordance with the access point station existing wireless local area network protocol has been established in the case of coupling, comprising the steps of: after 11 sites have sufficient information, to the access node sends an authentication request; after receiving the access point 12, sends an authentication response to the station, if the station is authenticated by the authentication success response sent to the station, execute step 1.3, if the site is not authenticated sends an authentication failure response to the station, execute step 1.1; 13 station sends access request to the access point; wherein, after said step 1.3, further comprising the step of: transmitting the access point 14 is coupled to the coupling site request according to the situation after their treatment. access response, to allow or deny the site, if the site to allow access to the coupled transmission success response, step 1.5, if the connection reject station sends an access failure response, step 1.1;. 15 establish a connection, a communication start ;. after 16 establish a connection with the access point station, when the access point needs to abort the existing connection with the site has been established, the access point and the station has been demolished 建立的联接,并保存必要的链路信息,同时构造并向站点发送转交指示消息;1. 7接入点给上述站点发送转交指示消息;1. 8站点接收到所述转交指示消息后进行识别处理,并从所述转交指示消息中提取再次联接需要的指示信息;1. 9站点根据所述转交指示消息中的再次联接指示信息,向所述转交指示消息中建议的新的接入点发送指定BSSID的定向探测请求帧,并开始再次联接过程。 Connection establishment, and save the necessary link information, and configured to send an indication message transmitted to the site;. 17 access points to transmit to said transmitting station indication message; identified after 18 station receives the handover indication message. processing, and extracts information indicating the need to re-coupled from the transmit indication message;. the station 19 is coupled to the retransmitted message indication information to the handover indication message proposed in the new access point sends BSSID specified directional probe request frame, the coupling process and starts again.
2、 如权利要求1所述的无线局域网中实现切换联接的方法,其特征在于,所述转交指示消息包含所述接入点建议站点进行再次联接的指示信息。 2, the wireless local area network as claimed in claim 1, implemented in a method of switching the coupling, characterized in that said indication message transmitted to the access point comprises instruction information again suggested site coupled.
3、 如权利要求1或2所述的无线局域网中实现切换联接的方法,其特征在于,所述转交指示消息包括MAC帧头,帧体和巾贞校验序列;所述帧头包括源MAC地址、目的MAC地址、控制域;所述帧体包括两部分内容,原因码为2个字节,其采用IEEE802. 1 1协议中的保留值,保留值范围为10〜655 35,取IO,含义为增加建议BSSID域,所述建议BSSID域6个字节,内容为接入点建议站点进行再次联接的建议接入点的BSSID; 所述帧校验序列用于接收方验证该帧是否正确。 3, a wireless local area network as claimed in claim 1 or 2, wherein the switchable coupling method implemented, characterized in that said transmitted indication message includes MAC frame header, frame body and the napkin Zhen check sequence; the source MAC header comprises address, destination MAC address, a control field; said frame member comprises two parts, the reason code is 2 bytes, a reserved value which employs protocol IEEE802 1 1, 35 retention value in the range of 10~655, taking IO,. meaning proposed increase BSSID field, the recommended BSSID field of 6 bytes, the contents of the access point BSSID recommendations suggested sites for the access points coupled again; frame check sequence for the recipient to verify that the correct frame .
4、 一种无线局域网中实现切换联接的方法,在站点与接入点按照现有的无线局域网协议正在建立联接的情况下,包括以下步骤:4.1站点得到足够的信息后,向接入点发送认证请求;4.2接入点接收后,给站点发送认证响应,若站点通过认证则给站点发送认证成功响应,则执行步骤4. 3,若站点未通过认证则给站点发送认证失败响应,则执行步骤4. 1;4.3站点给接入点发送联接请求;其特征在于,所述步骤4. 3后,还包括以下步骤:4.4接入点根据自身情况处理后向请求联接的站点发送联接响应,允许或拒绝站点的接入,若允许站点接入则发送联接成功响应,则接入点与站点建立联接,开始正常通信,若拒绝站点接入则构造转交指示消息,并执行步骤4.5;(4. 5接入点向正请求联接的站点发送转交指示消息;(4. 6站点接收到所述转交指示消息后进行识别处理,并 4. A method of switching a wireless LAN connection is implemented in accordance with the access point station existing wireless local area network protocol connection being established in the case, comprising the steps of: 4.1 the site sufficient information is transmitted to the access point authentication request; 4.2 access point receives, sends an authentication response to the station, if the station is authenticated by the authentication success response sent to the site, step 4.3, if the site is not transmitted to the station in response to the authentication by the authentication failure is performed step 4.1; 4.3 the coupling station sends a request to the access point; wherein, after said step 4.3, further comprising the step of: 4.4 the access point sends a request to the station in response to the coupling of the coupling according to the situation after their treatment, to allow or deny access to the site, if the site is allowed to send an access coupled success response, the access point and the station establish a connection, normal communication starts, if the access site is configured to transmit rejection indication message, and step 4.5; (4 5 the access point sends to the station is requesting a care-coupled indication message;. (46 station receives the handover indication message recognizing process, and 从所述转交指示消息中提取再次联接需要的指示信息;(4、 7站点根据所述转交指示消息中的再次联接指示信息,向所述转交指示消息中建议的新的接入点,发送指定BSSID的定向探测请求帧,并开始再次联接过程。 Indication message transmitted from the extracted indication information needed again coupled; (4, 7 is coupled again to the site according to the instruction information transmitted message, the handover to a new access point indication message proposed in the transmission designation BSSID directed probe request frame, the coupling process and starts again.
5、 如权利要求4所述的无线局域网中实现切换联接的方法,其特征在于,所述转交指示消息包含所述接入点建议站点进行再次联接的指示信息。 5, as claimed in claim 4, wherein the wireless local area network switch coupled implemented method, characterized in that said indication message transmitted to the access point comprises instruction information again suggested site coupled.
6、 如权利要求4或5所述的无线局域网中实现切换联接的方法,其特征在于,所述转交指示消息包括MAC帧头,帧体和帧校验序列;所述帧头包括源MAC地址、目的MAC地址、控制域;所述帧体包括五部分内容,能力信息、状态码、关联ID、支持的速率、建议BSSID;所述能力信息、关联ID、支持的速率与IEEE802. 1 1协议相一致,状态码为2个字节,其采用IEEE802. ll协议中的保留值,保留值范围为2〜9,取2,含义为增加建议BSSID域,所述建议BSSID域为6个字节,内容为接入点建议站点进行再次联接的建议接入点的BSSID;所述帧校验序列用于接收方验证该帧是否正确。 6, a wireless local area network as claimed in claim 4 or 5, the coupling switching method implemented, characterized in that said transmitted indication message includes MAC frame header, frame body and a frame check sequence; the source MAC address of the frame header comprises , destination MAC address, a control field; said frame body comprises five parts, the capability information, status code, association ID, supported rates, recommendations BSSID;. the capability information, association ID, and supported rates protocol IEEE802 1 1 consistent with status code 2 bytes, which uses IEEE802. retention ll protocol, retention value in the range of 2~9, take 2, meaning proposed increase BSSID field, the recommended BSSID field is 6 bytes , the contents of the access point BSSID recommendations suggested sites for the access points coupled again; frame check sequence for the recipient to verify that the frame is correct.
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