CN1968261B - Method for resource sharing in WLAN - Google Patents

Method for resource sharing in WLAN Download PDF

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Publication number
CN1968261B
CN1968261B CN 200510115314 CN200510115314A CN1968261B CN 1968261 B CN1968261 B CN 1968261B CN 200510115314 CN200510115314 CN 200510115314 CN 200510115314 A CN200510115314 A CN 200510115314A CN 1968261 B CN1968261 B CN 1968261B
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resource
processing unit
wireless
description
user
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CN 200510115314
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CN1968261A (en
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罗予晋
黄景楠
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联想(北京)有限公司
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Abstract

The invention relates to a method for sharing resource in wireless local network, wherein it comprises that: a, wireless network device describes its resource and sends the description to 802.11 protocol processor; b, protocol processor receives the description and putts it in expanded beacon frame; c, protocol processor broadcasts or multicasts expanded beacon frame; d, the protocol processors of devices receive said frame take out the resource description of beacon frame. Therefore, user can search needed resource in the description.

Description

一种在无线局域网中共享资源的方法 A method for sharing resources in a wireless local area network

技术领域 FIELD

[0001] 本发明涉及一种共享资源的方法,尤其涉及一种在802. 11标准的无线局域网中查找资源的方法。 [0001] The present invention relates to a method of sharing resources, particularly to a 802.11 wireless LAN standard method to find resources.

背景技术 Background technique

[0002] 目前,802. 11相关技术已经成为IEEE的系列标准,如802. lla/b/g/n/i/e等等。 [0002] Currently, the 802.11 IEEE related art has become a series of standards, such as 802. lla / b / g / n / i / e the like. 无线局域网络产品主要采用的是IEEE (美国电气和电子工程师协会)802. 1 Ib国际标准,大多应用DSSS (Direct Sequence Spread Spectrum,直接序列扩频)通信技术进行数据传输, 该技术能有效防止数据在无线传输过程中丢失、干扰、信息阻塞及破坏等问题。 Wireless LAN products are mainly used in the IEEE (Institute of Electrical and Electronics Engineers) 802. 1 Ib international standards, most applications DSSS (Direct Sequence Spread Spectrum, Direct Sequence Spread Spectrum) communication techniques for data transmission, this technology can effectively prevent data lost radio transmission, interference, obstruction and destruction of information and other issues. 相关的产品如网卡和无线接入点AP(ACCesS Point)及无线路由器都已经在市场上大量销售。 Related products such as network cards and wireless access points AP (ACCesS Point) and wireless routers have a large sale in the market.

[0003] 在无线通信领域,与其他无线局域网技术相比802. 11作为一种速度、覆盖范围、 功耗、使用成熟程度等综合性能比较好的技术正越来越多的在全球市场尤其是中国市场上出现,并为广大手持、移动设备所采用。 Good [0003] In the field of wireless communications, compared with other wireless LAN technology 802.11 as a speed, coverage, power consumption, maturity and other comprehensive performance technology is increasingly in the global market, especially in appear on the Chinese market, and for the majority of handheld, mobile equipment used. 802. 11无线设备有两种不同的配置方式:BSS和IBSS,BSS模式是常用的模式。 802.11 wireless device in two different configurations: BSS and IBSS, BSS mode is a common pattern. 它也被叫做“底层结构(infrastructure)”模式。 It is also called "underlying structure (Infrastructure)" mode. 在此种模式里,一些无线接入点连接到有线网络,每个无线网络有个名字。 In this mode, some of the wireless access point connected to a wired network, a wireless network each have a name. 这个名字被称为网络的服务区标识符(SSID)。 The name of the service area is known as a network identifier (SSID). 该技术可以将一个无线局域网分为几个需要不同身份验证的子网络,每一个子网络都需要独立的身份验证,只有通过身份验证的用户才可以进入相应的子网络,防止未被授权的用户进入本网络;接入点是一种无线网络设备,它允许一个或更多的无线客户端使用,此设备作为中心集线器(hub),使用接入点时,所有的客户端通过接入点通信。 The technology can be a wireless local area network into several different authentication needs of sub-networks, each sub-network requires separate authentication, only authenticated users can enter the corresponding sub-networks to prevent unauthorized users accessing this network; a wireless network access point is a device that allows one or more wireless clients using this device as a central hub (hub), the use of an access point, all clients communicate through the access point . 常用多个接入点来覆盖一个完整的区域,比如一所住房、一片商业区,或一座公园。 Common multiple access points to cover an entire area, such as a house, a business district, or a park. 接入点一般具有多个网络连接:无线网卡、一块或多块用于连接其它网络有线的以太网适配器。 Access points typically have multiple network connections: the wireless card, the one or more other networks for connecting a wired Ethernet adapter. IEEE 802. 11标准定义了用于无线网络连接的协议,在设定了SSID(Service Set Identifier)后,一个无线客户端可以连接到一个指定的网络。 IEEE 802. 11 standard defines a protocol for a wireless network connection, after setting the SSID (Service Set Identifier), a wireless client can be connected to a specified network.

[0004] 在现有技术中,特殊的应用以固定的SSID来表示,这样只需要扫描到该SSID即可知道相应的应用,然后进行接入使用;但是在这种情况下,其它不提供该类应用的设备一旦接入这样的SSID的网络,原来的提供该类应用的设备下线后,该ssid仍会由接入网络但不提供应用支持其他设备发出,使得其他需要使用该应用的设备误以为有相应的应用存在。 [0004] In the prior art, a particular application of a fixed SSID is represented, so only need to know the SSID scans to the appropriate application, then access to use; however, in this case, the other is not available Once the access device type applications such as network SSID, the device offline after such applications to provide the original, but still does not provide the ssid by the access device sends the network support other applications, such that other devices require the application mistakenly believed the corresponding application exists.

[0005] 上述现有方案中,如何了解未接入的网络上有什么应用和资源,通过现有的802. 11无法实现;如一种应用802. 11标准的游戏机,用户在没有接入无线网时,无法了解处于通信范围内的其它游戏机上的信息,无法与其它用户直接通信和共享资源,无法随时体验网络游戏,而且接入网络的时候需要用户进行配置,但是这种配置对于普通用户甚至是有技术背景的用户来说都是容易引起困惑的,不方便和无法完成的。 [0005] In the above-described conventional scheme, how to understand what applications and resources on the network not connected, can not be achieved by conventional 802.11; 802.11 standards such as one of the game machine application, the user does not access the wireless when the network can not understand the information in the other gaming machines within communication range, unable to communicate directly with other users and share resources, unable to experience online games at any time, and when the access network requires the user to configure, but this configuration for the average user even a user technical backgrounds, are likely to cause confusion, inconvenience and can not be completed.

[0006] 本发明的目的就是提供一种在802. 11标准的无线局域网中共享资源的方法, 该方法对于原802. 11机制进行了扩展,用于使得支持802. 11的设备能够通过扩展了的802. 11发现其他802. 11局域网内设备上的资源。 [0006] The object of the present invention is to provide a method of sharing resources 802.11 wireless LAN standard, the method is extended to the mechanisms of the original 802.11, 802.11 for such support devices can be extended by 802.11 discovery of resources on other devices in the LAN 802.11. 本发明采用如下方案实现本发明的目的: The present invention adopts the following solution object of the present invention to achieve:

[0007] 本发明提供一种在无线局域网中共享资源的方法,包括如下步骤:[0008] a)无线网络设备将其上的资源进行描述并将描述内容发给所述无线网络设备的802. 11协议处理单元; [0007] The present invention provides a method for sharing resources in a wireless local area network, comprising the steps of: [0008] a) a wireless network to the resource will be described and the description content 802 of the wireless distributed network devices. protocol processing unit 11;

[0009] b)802. 11协议处理单元在接收到资源描述后,将资源描述放在通过在802. 11媒体访问控制层的信标帧后增加一个信息元得到的扩展后的信标帧中; [0009] b) 802. 11 protocol processing unit after receiving the resource description, the resource will be described in a beacon frame after beacon by increasing the 802.11 media access control frame of a layer extension information element obtained ;

[0010] C)802. 11协议处理单元将通过在802. 11媒体访问控制层的信标帧后增加一个信息元得到的扩展后的信标帧进行广播或多播; . [0010] C) 802 11 protocol processing unit by adding the extended beacon frame obtained information element in a beacon frame after the 802.11 Media Access Control layer will be broadcast or multicast;

[0011] d)其它接收到该帧的设备的802. 11协议处理单元将信标帧中的资源描述内容取 802.11 protocol processing unit [0011] d) other receiving apparatus to the frame resource description taken beacon frame

出ο The ο

[0012] 所述步骤d)还包括:将所述信标帧中的资源描述内容取出后,保存到本地信息库。 [0012] The step d) further comprises: a resource description in the beacon frame taken out, saved to a local repository.

[0013] 所述本地信息库利用下述方法进行更新:将存在的无线网络中的设备的应用资源描述进行保存,将已经不存在无线网络中的设备的应用资源描述删除,或者根据用户设置,将其不关心的内容删去。 [0013] The local repository is updated by the following method: The present application describes resources in a wireless network device to save the resources of the wireless network has been applied in the absence of a device description deleted, or according to user settings, it does not care about the contents of the deleted.

[0014] 用户通过命令给所述其它接收到该帧的设备的802. 11协议处理单元发出要查找的资源描述信息,所述其它接收到该帧的设备的802. 11协议处理单元将所述本地信息库中的资源描述内容与用户发出的要查找的资源描述信息进行匹配,并将匹配的内容显示给用户。 [0014] the user command to the other 802.11 protocol processing unit receives the frame sent device resource description information to find the other device received the frame of 802.11 the protocol processing unit contents of the local repository of resources describe the content you want to find resources and information issued by the user to match the description and matched to the user.

[0015] 将上述获取的资源描述信息显示在屏幕上。 [0015] The above-described acquired resource description information displayed on the screen.

[0016] 采用本发明的上述技术方案,无线用户可以方便查找附近可共享的资源,尤其对于不需要保密通信的无线设备,如游戏机等,更加能让用户享受丰富的无线资源,提高了无线设备的实用性。 [0016] By adopting the technical solution of the present invention, the wireless user can easily find nearby shared resources, in particular, does not require secret communication for wireless devices, such as game consoles and the like, allow users to enjoy more extensive radio resources, increasing wireless usefulness of the device.

[0017] 通过以下结合附图对本发明优选实施方式的描述,本发明的其他特点、目的和效果将变得更加清楚和易于理解。 [0017] The description of the preferred embodiments of the present invention in conjunction with the following drawings, other features, objects and advantages of the present invention will become apparent and more readily appreciated.

[0018] 附图说明 [0018] BRIEF DESCRIPTION OF DRAWINGS

[0019] 下面将参考附图来描述本发明的优选实施方式,其中: [0019] be described below with reference to the accompanying drawings preferred embodiments of the present invention, wherein:

[0020] 图1为本发明中无线网络设备广播应用资源的流程; [0020] FIG network device broadcasts a radio resource application process of the present invention;

[0021] 图2为本发明中用户查找资源的流程图; [0021] FIG 2 is a flowchart of a user to find the resources in the invention;

[0022] 在所有的上述附图中,相同的标号表示具有相同、相似或相应的特征或功能。 [0022] In all the above drawings, the same reference numerals represent the same, similar or corresponding features or functions.

[0023] 具体实施方式 [0023] DETAILED DESCRIPTION

[0024] 下面结合附图对本发明做进一步的说明。 [0024] The following drawings further illustrate the present invention in combination.

[0025] 实施例一 [0025] Example a

[0026] 下面详细描述本发明的资源搜索方法,根据本发明的方法,使得基于802. 11协议的无线网络设备能够通过802. 11本身搜索到其它不同的802. 11网络中的设备上的资源, 参见图1,首先说明无线网络设备广播应用资源的流程,具体步骤如下: [0026] The following detailed description of the present invention, the resource discovery methods, the method according to the present invention, such devices 802.11 based wireless network protocol is able to search resources on other different devices in the network 802.11 802.11 by itself , Referring to Figure 1, first wireless network device broadcasts the process described application resources, the following steps:

[0027] 1)每个基于802. 11协议的无线网络设备将其上的应用资源进行描述并将描述内容发给802. 11协议处理单元,该描述信息是一段长度的文本;其中将描述内容发给802. 11 协议处理单元可以是定期的,也可以是人工操作的,当然,所述应用资源是可以共享的资源,并非所有的资源都要进行描述; [0027] 1) Each device 802.11-based wireless network protocol in its application to the resource will be described and the description issued 802.11 protocol processing unit, the information is a text description of a length; wherein the content will be described. issued 802.11 protocol processing unit may be periodic, may be manually operated, of course, the application resource can be a shared resource, not all resources have to be described;

[0028] 2)802. 11协议处理单元在接收到设备上的应用资源描述后,通过在802. IlMAC层的管理帧(beacon帧)后增加一个^formation Element,将应用资源描述放在其中,该字段的长度可变(与其他原有的可变的hformationElement共享整个beacon帧的固定长度),这样将这部分设备上的应用资源封装在802. IlMAC层的beacon帧中; [0028] 2) 802.11 protocol processing unit after receiving the application resource on a device is described, by the management frame (Beacon frame) 802. IlMAC layer increases a ^ formation Element, will be described in which application resources, variable length of the field (the entire fixed-length beacon frame shared with other existing variable hformationElement), so these portions of the application resource on a device package in the beacon frame 802. IlMAC layer;

[0029] 3) 802. 11协议处理单元将扩展后的beacon帧进行广播或多播; [0029] 3) 802.11 protocol processing unit after the extended beacon frame broadcast or multicast;

[0030] 4)其它接收到该帧的802. 11无线网络中的设备的802. 11协议处理单元, 将beacon帧中的描述内容取出,存放在本地信息库中,该信息库保持动态更新,借助于802. 11本身具备的对当前环境中的无线网络进行动态更新的能力,将存在的802. 11无线网络中的设备的应用资源描述保留在信息库中,将已经不存在了的无线网络的设备应用资源描述删除;也可以根据用户设置,判断收到的内容是否用户需要,如不是则删除。 [0030] 4) Other 802.11 protocol processing unit receives a 802.11 wireless network devices in the frame of the beacon frame description taken out, stored in the local repository, the repository to maintain dynamically updated, 802.11 ability by means of the current environment in wireless network dynamically updates itself with the application of resources of 802.11 wireless network equipment will be present in the description retained in the repository, it will no longer exist in the wireless network the apparatus of resource description deleted; may be set according to a user, the received content is determined whether the user needs, such as not delete. 这样,每个802. 11无线网络中的设备都可以获得该网络中或其它网络中的设备的应用资源信息。 Thus, each of the 802.11 wireless network devices can find application in the network resource or other network device information.

[0031] 下面结合图2描述用户搜索资源的流程,具体步骤如下: [0031] The following description of the resource user search process 2, the following steps:

[0032] A)802. 11协议的无线网络设备的用户发出命令来获取当前环境中的基于802. 11 协议的无线网络设备所提供的资源,命令中包含用户需要搜索的资源描述信息,为一段文本,用于查找匹配; [0032] The user of the wireless network device A) 802. 11 issues a command protocol to access resources of the current 802.11 protocol based wireless network device environment is provided, comprising a resource description information command the user needs to search for a period of text, used to find matching;

[0033] B)该命令将需要搜索的资源描述发送到该设备上的802. 11协议处理单元,该单元进行以下操作: [0033] B) resources need to search the command will be sent to 802.11 description protocol processing unit on the apparatus, the unit performs the following operations:

[0034] a)从动态更新的信息库中取得存放的资源描述内容,将内容与用户发出的查找条件进行匹配,并将匹配的内容返回给用户; [0034] a) obtaining information from the dynamically updated database of stored resource description, the search condition given by the user with the contents match, and returned to the user content matching;

[0035] b)同时,扩展802. IlMAC层的Probe Request管理帧,扩展方法与beacon帧的扩展方法相同,在ftObe Request帧后面扩展一个^formation Element,将用户发下的查找条件封装在该hformationEIement中,利用ftx)be Request的广播特性,将该查找请求发往其它(相同802. 11无线网络和不同的802. 11无线网络)的设备; [0035] b) At the same time, extend the Probe Request management frame 802. IlMAC layer, the same method of extending method and the beacon frame is extended behind a Request frame ftObe ^ formation Element, search conditions in the package sent to the user hformationEIement utilizing FTX) of the broadcast nature be request, the search request addressed to other (and the same wireless network 802.11 802.11 wireless network different) devices;

[0036] c)其他接到包含查找请求的ftx)be Request帧的802. 11无线网络设备的802. 11 协议处理单元,将扩展的ftObe Request帧中的^formation Element进行解析得到请求内容(资源描述信息),然后将该请求的内容上传给用户,由用户确定如何响应,如果用户拒绝响应则忽略该帧,如果用户确定响应,则将响应内容(一段描述文本)发给本设备的802. 11协议处理单元(当然,802. 11协议处理单元将扩展的ftx)be Request帧中的Information Element进行解析后,可以直接进行响应处理,例如将收到的查找条件(资源描述信息)与允许共享的应用资源描述内容进行匹配,其中允许共享的应用资源描述内容包括本地允许共享的应用资源描述内容和本地信息库中的应用资源描述内容,如果有匹配的内容,802. 11协议处理单元则通过扩展ftObe Response管理帧,将匹配的应用资源描述内容封装在Probe [0036] c) comprises a lookup requests to other FTX) 802.11 802.11 wireless protocol processing unit of the network device be Request frame, the extended ftObe Request frame ^ formation Element parse request to obtain the contents (the resource description information), and then uploads the requested content to the user, the user determines how to respond, if the user rejects the response frame is ignored, if the user determines a response, then the response content (a description text) is sent to the device 802. (FTX course, 802.11 extended protocol processing unit) protocol processing unit 11 after the information element be Request frame parsing process may be performed in direct response to, for example, search conditions (resource description information) and allows the sharing of the received matches the application resource description, which allows the sharing of an application resource description comprises an application resource description and application resources in the local repository description locally to allow sharing, if the content matching, 802.11 protocol processing unit through the extended ftObe Response management frame, matching the content encapsulated in the application resource description Probe Response扩展的hformationElernent中,返回请求发起的设备;作为另一种改进,还可以在获得匹配的内容后,将该匹配的内容首先显示给用户,由用户作如下处理: Response hformationElernent extended, the device returns the request initiator; As another improvement, the content may also be obtained in the matching, matching contents of the first display to the user, processing by the user as follows:

[0037] 从中挑选其愿意给其他设备共享的内容,并将该内容发给协议处理单元,封装在Probe Response扩展的Information Element中后返回给请求设备; After [0037] willing to pick and choose which content to other devices sharing the content and send protocol processing unit, enclosed in the extended Probe Response Information Element is returned to the requesting device;

[0038] 而且用户可以将其它其认为有关的内容也发给协议处理单元,封装在ftObe Response扩展的Information Element中后返回给请求设备。 [0038] and other users can be considered related to its content is sent to the protocol processing unit returns the encapsulated extended ftObe Response Information Element to the requesting device.

[0039] 其中返回给请求设备可以是点对点发送,也可以是广播发送(注:该设备可以是相同无线网络也可以是不同无线网络)); [0039] returned to the requesting device which may be a point to point transmission, transmission may be broadcast (Note: the wireless network device may be the same or may be different wireless network));

[0040] 对于ftObe Request帧的处理,也可以根据事先的设置,将在扩展的ftObeRequest帧中的^formation Element中解析得到的请求内容(资源描述信息)传给用户或是直接进行响应处理,用户可以设置成当本设备接收到扩展的Request帧时, 将其扩展部分(即查找条件描述信息)取出并作如下处理: [0040] For processing ftObe Request frame may be set in advance according to the ^ formation Element in the extended ftObeRequest frame parsing the requested content (resource description information) to the user or directly in response to treatment, the user obtained It may be provided when the device receives the Request frame extended, which extension (i.e., information describing search criteria) is removed and treated as follows:

[0041] 1.显示给用户。 [0041] 1. displayed to the user. 如果用户对此不感兴趣,则忽略该查找请求;如果用户允许,则进行相应的查找动作,如与其共享内容进行匹配等,如有匹配的内容则通过ftObe Response 发回响应。 If the user is not interested, the search request is ignored; if the user is allowed, corresponding lookup operation is performed, such as to share content matching, the matching is subject to the response sent back by ftObe Response. 其中对于是否显示给用户也可以进行设置: Wherein whether displayed to the user may be provided:

[0042] 1)将所有收到的查找请求显示给用户; [0042] 1) all received search request to the user;

[0043] 2)设置过滤条件,将符合过滤条件的查找请求显示给用户看。 Search request [0043] 2) set the filter condition to meet the filter criteria shown to the user.

[0044] 2.不显示给用户。 [0044] 2. Does not displayed to the user. 此时,用户可以做如下设置: In this case, the user can make the following settings:

[0045] 1)拒绝所有的查找请求; [0045] 1) Find all rejected requests;

[0046] 2)设定过滤条件,如只允许对方查找MP3文件,那么目标是MP3的查找条件将通过过滤,并通过某个搜索程序检索该设备上符合查找条件的MP3文件,并将结果通过Probe Response 返回; [0046] 2) set the filter conditions, such as allowing only each other to find MP3 files, then the goal is to find conditions for MP3 will pass through the filter and retrieve MP3 files that match the search criteria on the device via a search program and results Probe Response return;

[0047] 3)接收所有的查找请求,即没有过滤条件,全部请求都通过过滤。 [0047] 3) all received search request, i.e., no filter conditions, all requests by filtration.

[0048] D)收到扩展的ftObe Response帧的设备的802. 11协议处理单元,将扩展的Information Element的内容上传给用户; 802.11 protocol processing unit [0048] D) received extension device ftObe Response frame, extended Information Element content upload to a user;

[0049] 用户之间还可以进行一对一的协商,比如就互相发现的资源进行交易,该协商的往来信息通过扩展Probe Request禾口Response的Information Element来进行,此时的Probe Request帧采用具体的目标MAC地址(beacon帧和ProbeRequest帧中包含发送该消息的设备的无线网卡的SSID和信道),不再采用广播。 [0049] between users can be one to one consultations, such as on the resources found in each transaction, the negotiation of exchanges of information carried out by the expansion of Hekou Response Probe Request of Information Element, at this time of the adoption of specific Probe Request frame destination MAC address (including the device sending the beacon frame message and a wireless LAN frame ProbeRequest SSID and channel), using no longer broadcast. 接收到beacon帧和ftx)be Request 帧的802. 11协议处理单元从中提取目标MAC地址,将本地无线设备的SSID和信道均设置成与对方一样,如果没有安全限制(如对方需要WEP加密)则两设备即处于同一链路中,通过上层的TCP/IP协议,两个设备即可交换数据。 Receives the beacon frame and ftx) be Request frames 802.11 protocol processing unit which extracts the destination MAC address, the SSID and channel local wireless devices are arranged with each other as if no security restrictions (such as other required WEP encryption) is i.e., two devices in the same link, through the upper layer TCP / IP protocol, two devices can exchange data.

[0050] 上述方案中每个无线网络设备,不用根据服务区标识符(SSID)进行限制性的登陆,所有处于能够通信的距离中的无线网络设备都能够接收其它无线网络设备的广播信息以及利用MAC地址进行相互的点对点通信。 [0050] In the above-described embodiment each wireless network device without restriction in accordance with the service login identifier area (the SSID), it is capable of all-range communication network in the wireless device can receive the broadcast information to other wireless network devices and the use of MAC address for each P2P communication. 对于步骤1)至步骤5)的过程为可选过程,在流程中每个无线设备可以事先不必广播该设备的应用资源。 For process step 1) to step 5) is an optional process, in the process in advance of each wireless device may not necessarily use resources of the broadcast device.

[0051 ] 下面根据上述方法例举两个应用实例进行说明: [0051] exemplified by the following two examples will be described in accordance with the method described above:

[0052] 第一个实例,本实例中例举一个玩游戏的操作流程,甲在使用一个支持802. 11协议的Game Player,启动一个俄罗斯方块程序,选择两人对打功能,当点击“寻找对手”按钮时,该程序生成应用资源描述信息“俄罗斯方块对打,缺一人”,并将该应用资源描述信息传至设备的802. 11协议处理单元,协议处理单元将该应用资源描述信息放到扩展的802. IlMAC层的管理帧beacon帧中的“^formation Element”中,利用扩展的beacon帧将该描述广播。 [0052] the first instance, in this instance exemplified play a game of operational processes, the use of armor in a support 802.11 protocols Game Player, Tetris start a program, select the two sparring function, click on the "Find opponents "button, the application program generates resource description information" Tetris rally, a lack of people, "and the application resource description 802.11 protocol information transmitted to the device processing unit, the protocol processing unit of resource description information release the extended management layer 802. IlMAC frame beacon frame "^ formation Element", using the extended beacon frame described in the broadcast. 在甲的附近还有其他一些人也持有支持802. 11协议的Game Player,这些Game Player上的802. 11协议处理单元能够接收到甲广播发送的beacon帧中的扩展内容,如果Game Player设定为自动刷新当前车厢里的无线设备资源,它会间隔一定时间将收到的应用资源描述保留在信息库中,将已经不存在了的无线网络的设备应用资源描述删掉;并将保留在信息库中的应用资源描述信息周期性的显示在屏幕上,当收到甲发出的信息后,此时屏幕上出现“俄罗斯方块对打,缺一人”的信息,点击该消息条,系统查找“俄罗斯方块对打,缺一人”消息的属性,其属性中应包含发送该消息的设备的无线网卡的SSID和信道,这些信息均从发送该消息设备的无线网卡的beacon帧中获得,802. 11协议处理单元根据获得的SSID和信道信息,自动将本无线设备的SSID和信道均设置成与甲的无线设备相同 There are other people in the vicinity of A also holds 802.11 protocol supports Game Player, the 802.11 protocol processing unit on the Game Player can receive the Extended Content A broadcast beacon frame transmitted if Game Player provided set to automatically refresh the current resources of wireless devices in the car, it will apply a certain time interval will receive resource description retention device application resource in the repository, it will no longer exist in the wireless network depicted deleted; and will remain in application resource description information repository periodically displayed on the screen, when the received message sent by Alice, "Tetris rally, missing a man" message appears on the screen, click on the message bar, the system looks. " Tetris sparring, missing one "attribute of the message, which attribute should include the SSID and channel transmission device the message of the wireless network card, this information is obtained from the beacon frame transmitted to the messaging device is a wireless network card, the 802.11 the protocol processing unit SSID and channel information obtained automatically SSID and channel on the wireless device a wireless device are provided with the same a 如果没有安全限制(如对方需要WEP加密)则两设备即处于同一链路中,通过上层的TCP/IP协议,两个设备上的网络游戏程序即可交换数据和状态,开始游戏。 If there is no security restrictions (such as other required WEP encryption) i.e. the two devices in the same link, through the upper layer TCP / IP protocol, the network game program on the two devices can exchange data and status to start the game.

[0053] 第二个实例:A使用一个支持802. 11协议的Networked MP3 Player (MP3播放器), 启动MP3播放器中的查找网络资源命令,在命令中输入带有需要查找的相关信息,如“do you have fir MP3”,然后启动,该命令将该信息发至该MP3播放器的802. 11协议处理单元, 该单元从动态更新的信息库中取得存放的资源描述内容,将内容与用户发出的查找条件进行匹配,当然这里可以利用现有的查找匹配方法,如模糊匹配法,并将匹配的内容返回给用户;同时,802. 11协议处理单元扩展802. IlMAC层的ftObe Request管理帧,扩展方法与beacon帧的扩展方法相同,在Probe Request帧后面扩展一个Information Element,将用户发下的查找条件(描述信息)封装在该hformationEIement中,利用ftObe Request的广播特性,将该查找请求发往相同的802. 11无线网络和不同的802. 11无线网络的设备。 [0053] A second example: A use of a support 802.11 protocols Networked MP3 Player (MP3 player) to start the MP3 player find the network resource command, enter the relevant information with the need to look in the command, such as "do you have fir MP3", and then start the command send the information to the 802.11 protocol processing unit of the MP3 player, which describe the content storage unit access to resources from the dynamically updated repository, content and user matching the search criteria given, of course, there may be utilized to find a match conventional methods such as fuzzy matching, and matching content returned to the user;. Meanwhile, 80211 protocol processing unit 802. IlMAC spreading layer ftObe Request management frame , same spreading method beacon frame extension method, after the Probe request frame extended an information Element, issued to the user's search criteria (description) is encapsulated in the hformationEIement, the use of the broadcast properties ftObe request, send the search request to the same equipment 802.11 wireless networks and various 802.11 wireless network. 在附近的802. 11无线网络的设备收到该广播信息,将收到的应用资源描述保留在信息库中, 将已经不存在了的无线网络的设备应用资源描述删掉;并将保留在信息库中的应用资源描述信息显示在屏幕上,此时假如B在其Networked MP3 Player上设置了“MP3共享”状态, 此时他收到了“do you have FIR MP3”的请求,该请求在他的Networked MP3 Player上显示出来,他点击该消息进行了响应,同时可以附带描述信息,例如“我有,你有许巍的歌吗? 能否交换?”,802. 11协议处理单元接到该信息后,立即寻找发出“do you have FIR MP3” 的设备A的MAC地址,该地址为其收到的ftObe Request广播帧的一个字段,根据该地址, 得到相应的响应帧(Probe Response)的目的地址,并以同样的方法扩展响应帧,在响应帧中封装描述信息“我有,你有许巍的歌吗?能否交换? ”,即在B设备所在信道 In the 802.11 wireless network devices in the vicinity of the broadcast information is received, the application will receive a resource reservation device described in the application resource repository, it does not exist in the wireless network depicted deleted; and reservation information library of resource description information is displayed on the screen, then if B set "MP3 sharing" status on its Networked MP3 Player, this time he received a "do you have FIR MP3" of the request, which in his after displayed on Networked MP3 Player, click on the message he has responded, while accompanying descriptive information, such as "I have, you have Xu Wei song? can exchange?", 802.11 protocol processing unit connected to the information , issued immediately find the MAC address "do you have FIR MP3" a device a, ftObe a Request field of the broadcast frame received its address, based on the address, the corresponding response frame (Probe response) destination address, and in the same way extended response frame, the response frame package descriptions "I have, you have Xu Wei song? can exchange?", that is where the channel B equipment 出带有响应消息的扩展的ftObe Response返回A,A同样对显示在其设备上的响应消息进行了响应, 如“有”或者“没有”,并根据上述相同的方法,由B设备中的802. 11协议处理单元获取B的无线MAC地址,将其作为扩展Request帧的目的地址,以单播发回给B,B通过扩展ProbeResponse将响应消息“好的”发给A,同时802. 11协议处理单元根据获得的SSID和信道信息,自动将本无线设备的SSID和信道均设置成与A的无线设备相同(当然,也可以是A的802. 11协议处理单元根据获得的SSID和信道信息,自动将本无线设备的SSID和信道均设置成与B的无线设备相同),然后A和B切入同一网络(切入同一网络方法见方式1 相应部分),基于IP进行具体的MP3数据交换。 ftObe Response with an extended response message returned A, A on the same display in response to a response message on the device, such as "yes" or "no", and according to the same method as described above, the device B 802 11. the protocol processing unit acquires the wireless MAC address B, which is as an extension Request frame destination address, a unicast back to B, B by extending the response message ProbeResponse "good" issued to a, while the protocol processing 802.11 unit according SSID and channel information obtained automatically SSID and channel on the wireless device are set to the same wireless device a (of course, may be a 802.11 protocol processing unit a according to the SSID and channel information obtained automatically the SSID and channel on the wireless device are set the same wireless device B), a and B are then cut into the same network (same network method of cutting a portion corresponding manner see), MP3-specific IP-based data exchange. 在另一种情况,如果B设备拒绝,则不用响应A。 In another case, the device B if rejected, no response A.

[0054] 本领域普通技术人员根据现有掌握的802. 11协议就能容易的实施本发明的方法。 [0054] ordinary skill in the art in accordance with existing 802.11 protocols will be able to readily grasp the embodiment of the present invention. 以上所述仅是本发明的优选实施方式,应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明原理的前提下,还可以作出若干改进和润饰,这些改进和润饰也应视为本发明的保护范围。 The above are only preferred embodiments of the present invention, it should be noted that those of ordinary skill in the art, in the present invention without departing from the principles of the premise, further improvements and modifications may be made, these improvements and modifications should also be the protection scope of the present invention.

7 7

Claims (5)

1. 一种在无线局域网中共享资源的方法,包括如下步骤:a)无线网络设备将其上的资源进行描述并将描述内容发给所述无线网络设备的802. 11协议处理单元;b)802. 11协议处理单元在接收到资源描述后,将资源描述放在通过在802. 11媒体访问控制层的信标帧后增加一个信息元得到的扩展后的信标帧中;c)802. 11协议处理单元将通过在802. 11媒体访问控制层的信标帧后增加一个信息元得到的扩展后的信标帧进行广播或多播;d)其它接收到该帧的设备的802. 11协议处理单元将信标帧中的资源描述内容取出。 1. A method for sharing resources in a wireless local area network, comprising the steps of: a) a wireless network to the resource will be described and the description issued 802.11 protocol processing unit of the wireless network device; b) 802.11 protocol processing unit after receiving the resource description, the resource will be described in the beacon frame by increasing the 802.11 media extended information element obtained after a beacon frame after access control layer in; c) 802. protocol processing unit 11 will be broadcast or multicast beacon frame by adding the extended information element obtained in a beacon frame after the 802.11 media access control layer; D) other receiving apparatus to the frame 802. 11 protocol processing unit resource description taken in a beacon frame.
2.根据权利要求1所述的一种在无线局域网中共享资源的方法,其特征在于,所述步骤d)还包括:将所述信标帧中的资源描述内容取出后,保存到本地信息库。 2. A method according to one of the shared resources in a wireless local area network as claimed in claim, wherein said step d) further comprises: a resource description in the beacon frame after removing the local information stored library.
3.根据权利要求2所述的一种在无线局域网中共享资源的方法,其特征在于,所述本地信息库利用下述方法进行更新:将存在的无线网络中的设备的应用资源描述进行保存, 将已经不存在无线网络中的设备的应用资源描述删除,或者根据用户设置将其不关心的内容删除。 The second method is one of the shared resources in a wireless local area network as claimed in claim, wherein the local repository is updated by the following method: The present application describes resources in a wireless network is saved with , will have a wireless network device does not exist in the application resource description delete, or delete its contents do not care according to user settings.
4.根据权利要求2或3所述的一种在无线局域网中共享资源的方法,其特征在于,用户通过命令给所述其它接收到该帧的设备的802. 11协议处理单元发出要查找的资源描述信息,所述其它接收到该帧的设备的802. 11协议处理单元将所述本地信息库中的资源描述内容与用户发出的要查找的资源描述信息进行匹配,并将匹配的内容显示给用户。 4. The method of claim 2 or 3 shared resources in a wireless local area network as claimed in claim, wherein a user of the 802.11 protocol to the other device receiving the frame sent by the command processing unit to look for resource description information to the other device receiving the frame protocol processing unit 802.11 resource description information to find the resource with the description given by the user local information repository matching, and matching the content display to the user.
5.根据权利要求4所述的一种在无线局域网中共享资源的方法,其特征在于,将获取的资源描述信息显示在屏幕上。 5. A method according to one of the 4 shared resource in a wireless local area network as claimed in claim, characterized in that the acquired resource description information displayed on the screen.
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