CN1968261B - Method for resource sharing in WLAN - Google Patents
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- CN1968261B CN1968261B CN2005101153147A CN200510115314A CN1968261B CN 1968261 B CN1968261 B CN 1968261B CN 2005101153147 A CN2005101153147 A CN 2005101153147A CN 200510115314 A CN200510115314 A CN 200510115314A CN 1968261 B CN1968261 B CN 1968261B
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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
Technical field
The present invention relates to a kind of method of shared resource, relate in particular to a kind of method of in the WLAN (wireless local area network) of 802.11 standards, searching resource.
Background technology
At present, 802.11 correlation techniques have become the series standard of IEEE, as 802.11a/b/g/n/i/e or the like.What the WLAN product mainly adopted is IEEE (IEEE-USA) 802.11b international standard, use DSSS (Direct Sequence Spread Spectrum mostly, direct sequence spread spectrum) communication technology is carried out transfer of data, and this technology can prevent effectively that data from losing in the wireless transmission process, interference, information is blocked and problem such as destruction.Relevant product such as network interface card and wireless access point AP (Access Point) and wireless router be mass selling on market all.
At wireless communication field, compare 802.11 with other wireless local area network technologies and just more and more on world market especially Chinese market, occur, and adopted by vast hand-held, mobile device as reasonable technology of combination property such as a kind of speed, coverage, power consumption, use maturity.802.11 wireless device has two kinds of different configuration modes: BSS and IBSS, the BSS pattern is the pattern of using always.It also is called " fabric (infrastructure) " pattern.In this kind pattern, some WAP (wireless access point) are connected to cable network, and each wireless network has individual name.This name is called as the Service Area Identifier symbol (SSID) of network.This technology can be divided into a WLAN (wireless local area network) several sub-networks that need the different identity checking, each sub-network all needs independently authentication, have only user just can enter corresponding sub-network, prevent that uncommitted user from entering present networks by authentication; Access point is a kind of Wireless Communication Equipment, and it allows one or more wireless clients to use, and this equipment is as central hub (hub), and when using access point, all clients are by access point communication.A plurality of access points commonly used cover a complete zone, such as a house, a slice shopping centre, or a park.Access point generally has a plurality of networks and connects: wireless network card, one or more is used to connect the wired Ethernet Adaptation Unit of other network.IEEE 802.11 standard definitions be used for the agreement that wireless network connects, after having set SSID (Service Set Identifier), a wireless client can be connected to the network of an appointment.
In the prior art, special application represents that with fixing SSID so only need scan this SSID promptly knows application corresponding, inserts use then; But in this case, other does not provide the equipment of such application in a single day to insert the network of such SSID, after the equipment that such application is provided originally rolls off the production line, this ssid still can be by access network but is not provided application to support that other equipment send, and makes other need use the equipment of this application to take for application corresponding and exists.
In the above-mentioned existing scheme, how understanding on the network that does not insert has what application and resource, can't realize by existing 802.11; Game machine as a kind of application 802.11 standards, the user is not when inserting wireless network, can't understand the information on other game machine that is in the communication range, can't with other user's direct communication and shared resource, can't experience online game at any time, and need the user to be configured access network the time, but this configuration for domestic consumer or even have the user of technical background all be cause easily puzzled, inconvenient and can't finish.
Purpose of the present invention just provide a kind of in the WLAN (wireless local area network) of 802.11 standards the method for shared resource, this method is expanded for former 802.11 mechanism, is used for make supporting 802.11 equipment 802.11 to find the resource on the equipment in other 802.11 local area network (LAN)s by what expanded.The present invention adopts following scheme to realize purpose of the present invention:
The invention provides a kind of in WLAN (wireless local area network) the method for shared resource, comprise the steps:
A) Wireless Communication Equipment is described the resource on it and will describe 802.11 protocol processing unit that content is issued described Wireless Communication Equipment;
B) 802.11 protocol processing unit are after receiving resource description, and resource description is placed on by increasing behind the beacon frame of 802.11 MAC layer in the beacon frame after the expansion that an information word obtains;
C) 802.11 protocol processing unit will be carried out broadcast or multicast by the beacon frame after the expansion that obtains in information word of increase behind the beacon frame of 802.11 MAC layer;
D) other 802.11 protocol processing unit that receive the equipment of this frame are taken out the resource description content in the beacon frame.
Described step d) also comprises: after the resource description content in the described beacon frame is taken out, be saved in the local information storehouse.
Described local information Cooley upgrades with following method: the application resource of the equipment in the wireless network that exists is described preserved, with there not being the application resource of the equipment in the wireless network deletion is not described, perhaps be provided with, its unconcerned content is left out according to the user.
The user sends the resource description information that will search for described 802.11 protocol processing unit that other receives the equipment of this frame by order, described 802.11 protocol processing unit that other receives the equipment of this frame are mated the resource description information that will search that the resource description content in the described local information storehouse and user send, and the content of coupling is shown to the user.
The above-mentioned resource description information of obtaining is presented on the screen.
Adopt technique scheme of the present invention, the wireless user can be easy-to-look-up near sharable resource, especially for the wireless device of not need to be keep secret communication, as game machine etc., can allow the user enjoy abundant Radio Resource more, improve the practicality of wireless device.
By below in conjunction with the accompanying drawing description of the preferred embodiment of the present invention, other characteristics of the present invention, purpose and effect will become clear more and easy to understand.
Description of drawings
Preferred implementation of the present invention is described below with reference to the accompanying drawings, wherein:
Fig. 1 is the flow process of Wireless Communication Equipment broadcasted application resource among the present invention;
Fig. 2 searches the flow chart of resource for user among the present invention;
In all above-mentioned accompanying drawings, identical label represents to have identical, similar or corresponding feature or function.
Embodiment
The present invention is described further below in conjunction with accompanying drawing.
Embodiment one
Describe resource search method of the present invention below in detail, the method according to this invention, making can be by the resource on 802.11 equipment that search in other 802.11 different networks itself based on the Wireless Communication Equipment of 802.11 agreements, referring to Fig. 1, the flow process of Wireless Communication Equipment broadcasted application resource at first is described, concrete steps are as follows:
1) each Wireless Communication Equipment based on 802.11 agreements is described the application resource on it and will describe content and issues 802.11 protocol processing unit, and this descriptor is the text of a segment length; Wherein will describing content, to issue 802.11 protocol processing unit can be regular, also can be manually-operated, and certainly, described application resource is can resources shared, is not that all resources all will be described;
2) 802.11 protocol processing unit are after the application resource on the equipment of receiving is described, increase an Information Element by management frames (beacon frame) back at the 802.11MAC layer, the application resource description is placed on wherein, the variable-length of this field (sharing the regular length of whole beacon frame with other original variable InformationElement) is encapsulated in the application resource on this part equipment in the beacon frame of 802.11MAC layer like this;
3) the beacon frame after 802.11 protocol processing unit will be expanded carries out broadcast or multicast;
4) other receives 802.11 protocol processing unit of the equipment in 802.11 wireless networks of this frame, description content in the beacon frame is taken out, leave in the local information storehouse, this information bank keeps dynamically updating, the ability that dynamically updates by means of 802.11 the wireless networks that possess itself in the current environment, the application resource of the equipment in 802.11 wireless networks that exist described being retained in the information bank, the equipment application resource of the wireless network that do not existed is described deletion; Also can be provided with, judge whether user's needs of the content receive, as not being then to delete according to the user.Like this, the equipment in each 802.11 wireless network can obtain in this network or the application resource information of the equipment in other network.
Describe the flow process of user search resource below in conjunction with Fig. 2, concrete steps are as follows:
A) user of the Wireless Communication Equipment of 802.11 agreements gives an order and obtains the resource that Wireless Communication Equipment provided based on 802.11 agreements in the current environment, comprise the resource description information that the user need search in the order, be one section text, be used to search coupling;
B) this order resource description that will need to search for sends to 802.11 protocol processing unit on this equipment, and this unit carries out following operation:
A) obtain the resource description content of depositing from dynamic updated information storehouse, the search criterion that content and user are sent mates, and the content of coupling is returned to the user;
B) simultaneously, the Probe Request management frames of expansion 802.11MAC layer, extended method is identical with the extended method of beacon frame, at Information Element of Probe Request frame back expansion, the search criterion that the user is given is encapsulated among this InformationElement, utilize the broadcast characteristic of Probe Request, this search request is mail to the equipment of other (identical 802.11 wireless networks and 802.11 different wireless networks);
C) other receive 802.11 protocol processing unit of 802.11 Wireless Communication Equipment of the Probe Request frame that comprises search request, Information Element in the Probe Request frame of expansion is resolved and obtains request content (resource description information), the content uploading that to ask is given the user then, determine how to respond by the user, if the user refuses response then ignores this frame, if the user determines response, 802.11 protocol processing unit of then response contents (describing text for a section) being issued this equipment are (certain, after 802.11 protocol processing unit is resolved the Information Element in the Probe Request frame of expansion, can directly respond processing, for example the search criterion of receiving (resource description information) being described content with the application resource that allows to share mates, the application resource of wherein allow sharing is described the application resource that content comprises that the local application resource that allows to share is described in content and the local information storehouse and is described content, if the content of coupling is arranged, 802.11 protocol processing unit is then by expansion Probe Response management frames, the application resource of coupling is described among the InformationElernent that content is encapsulated in Probe Response expansion, returned the equipment that request is initiated; Improve as another kind, can also be after the content that obtains coupling, the content of this coupling at first is shown to the user, do following processing by the user:
Therefrom select it and be ready, and this content is issued protocol processing unit, return to requesting service after being encapsulated among the Information Element of Probe Response expansion to other equipment shared content;
And the user can think that relevant content also issues protocol processing unit with other its, returns to requesting service after being encapsulated among the Information Element of Probe Response expansion.
Wherein returning to requesting service can be point-to-point transmission, also can be broadcast transmission (annotate: this equipment can be that same wireless network also can be a different networks));
Processing for Probe Request frame, also can be according to prior setting, to resolve the request content (resource description information) that obtains in the Information Element in the ProbeRequest frame of expansion passes to the user or directly responds processing, the user can be arranged to when this equipment receives the Probe Request frame of expansion, and its expansion (being the search criterion descriptor) is taken out and do following processing:
1. be shown to the user.If the user loses interest in to this, then ignore this search request; If the user allows, then search action accordingly, mate etc. as content shared with it, then beam back response if any the content of coupling by Probe Response.Wherein also can be provided with for whether being shown to the user:
1) search request that all are received is shown to the user;
2) filtercondition is set, the search request that will meet filtercondition is shown to the user and sees.
2. be not shown to the user.At this moment, the user can do following setting:
1) refuses all search request;
2) set filtercondition, search mp3 file as only allowing the other side, target is that the search criterion of MP3 will be by filtration so, and retrieves the mp3 file that meets search criterion on this equipment by certain search utility, and the result is returned by Probe Response;
3) receive all search request, promptly do not have filtercondition, all request is all passed through to filter.
D) receive 802.11 protocol processing unit of equipment of the Probe Response frame of expansion, give the user the content uploading of the Information Element of expansion;
Can also carry out man-to-man negotiation between the user, such as concluding the business with regard to the resource of finding mutually, the contact information of this negotiation is undertaken by the Information Element of expansion Probe Request and Response, the Probe Request frame of this moment adopts concrete destination-mac address (SSID and the channel that comprise the wireless network card of the equipment that sends this message in beacon frame and the ProbeRequest frame), no longer adopts broadcasting.802.11 protocol processing unit that receive beacon frame and Probe Request frame are therefrom extracted destination-mac address, all be arranged to the other side the same with channel the SSID of local wireless devices, if do not have security limitations (needing WEP to encrypt) then two equipment promptly are in the same link as the other side, by the ICP/IP protocol on upper strata, two equipment are exchange data.
Each Wireless Communication Equipment in the such scheme, need not accord with (SSID) according to Service Area Identifier and carry out restrictive landing, all Wireless Communication Equipment that are in the distance that can communicate by letter can both receive the broadcast message of other Wireless Communication Equipment and utilize MAC Address to carry out mutual point-to-point communication.For step 1) to the process of step 5) is optional process, and each wireless device can needn't be broadcasted the application resource of this equipment in advance on stream.
Exemplifying two application examples according to said method below describes:
First example, exemplify an operating process of playing games in this example, first is at the Game Player that uses to support 802.11 agreements, start a Tetris program, select the two people function of fighting each other, when clicking " seeking the adversary " button, this program generates application resource descriptor " Tetris air exercise; lack a people ", and this application resource descriptor is reached 802.11 protocol processing unit of equipment, protocol processing unit is put into this application resource descriptor among " the Information Element " in the management frames beacon frame of 802.11MAC layer of expansion, utilizes the beacon frame of expansion should describe broadcasting.Near first, also have some other people also to hold the Game Player that supports 802.11 agreements, 802.11 protocol processing unit on these Game Player can receive the expansion content in the beacon frame of first broadcast transmission, if Game Player is set at the wireless device resources that refreshes automatically in front compartment, its at interval certain hour the application resource of receiving described be retained in the information bank, the equipment application resource of the wireless network that do not existed is described deleting; And the application resource descriptor that will be retained in the information bank periodically is presented on the screen, after receiving the information that first is sent, the information that occurs " Tetris air exercise; lack a people " this moment on the screen, click this message bar, the attribute of system searching " Tetris air exercise; lack a people " message, the SSID and the channel that should comprise the wireless network card of the equipment that sends this message in its attribute, these information all obtain from the beacon frame of the wireless network card that sends this messaging device, 802.11 protocol processing unit is according to the SSID and the channel information that obtain, automatically the SSID with this wireless device all is arranged to identical with the wireless device of first with channel, if do not have security limitations (needing WEP to encrypt) then two equipment promptly are in the same link as the other side, ICP/IP protocol by the upper strata, online game program on two equipment is exchange data and state, begins recreation.
Second example: A uses a Networked MP3 Player (MP3 player) who supports 802.11 agreements, start the Network Search Resource Commands in the MP3 player, input has the relevant information that need search in order, as " do you have fir MP3 ", start then, 802.11 protocol processing unit of this MP3 player are sent to this information in this order, the resource description content of depositing is obtained in this unit from dynamic updated information storehouse, the search criterion that content and user are sent mates, certainly can utilize the existing matching process of searching here, as the fuzzy matching method, and with the coupling content return to the user; Simultaneously, 802.11 the Probe Request management frames of protocol processing unit expansion 802.11MAC layer, extended method is identical with the extended method of beacon frame, at Information Element of Probe Request frame back expansion, the search criterion (descriptor) that the user is given is encapsulated among this InformationElement, utilize the broadcast characteristic of Probe Request, this search request is mail to the equipment of 802.11 identical wireless networks and different 802.11 wireless networks.The equipment of nigh 802.11 wireless networks is received this broadcast message, the application resource received is described being retained in the information bank, the equipment application resource of the wireless network that do not existed is described deleting; And the application resource descriptor that will be retained in the information bank is presented on the screen, if B this moment is provided with " MP3 shares " state on its Networked MP3 Player, this moment, he received the request of " do you have FIR MP3 ", this request shows on his Networked MP3 Player, he clicks this message and responds, simultaneously can attach descriptor, for example " do I have; you have the song of Xu Wei? can exchange? " after 802.11 protocol processing unit is received this information, seek the MAC Address of the device A of sending " do you have FIR MP3 " immediately, this address is a field of its Probe Request broadcast frame of receiving, according to this address, obtain the destination address of corresponding response frame (Probe Response), and with same method extended response frame, in response frame, encapsulate descriptor " I have; you have the song of Xu Wei? can exchange? " promptly the Probe Response that sends the expansion that has response message at B equipment place channel returns A, A responds the response message that is presented on its equipment equally, as " having " or " not having ", and according to above-mentioned identical method, obtain the wireless MAC address of B by 802.11 protocol processing unit in the B equipment, with its destination address as expansion Probe Request frame, send back to B with clean culture, B issues A by expansion ProbeResponse with response message " good ", 802.11 protocol processing unit are according to the SSID and the channel information that obtain simultaneously, automatically the SSID with this wireless device all is arranged to identical (certainly with the wireless device of A with channel, 802.11 protocol processing unit that also can be A are according to the SSID and the channel information that obtain, automatically the SSID with this wireless device all is arranged to identical with the wireless device of B with channel), A and B incision consolidated network (square formula 1 appropriate section of incision consolidated network method) carries out concrete MP3 exchanges data based on IP then.In another kind of situation, if B equipment refusal then need not respond A.
Those of ordinary skills just can be easy to implement method of the present invention according to existing 802.11 agreements of grasping.The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (5)
1. the method for a shared resource in WLAN (wireless local area network) comprises the steps:
A) Wireless Communication Equipment is described the resource on it and will describe 802.11 protocol processing unit that content is issued described Wireless Communication Equipment;
B) 802.11 protocol processing unit are after receiving resource description, and resource description is placed on by increasing behind the beacon frame of 802.11 MAC layer in the beacon frame after the expansion that an information word obtains;
C) 802.11 protocol processing unit will be carried out broadcast or multicast by the beacon frame after the expansion that obtains in information word of increase behind the beacon frame of 802.11 MAC layer;
D) other 802.11 protocol processing unit that receive the equipment of this frame are taken out the resource description content in the beacon frame.
2. according to claim 1 a kind of in WLAN (wireless local area network) the method for shared resource, it is characterized in that described step d) also comprises: after the resource description content in the described beacon frame is taken out, be saved in the local information storehouse.
3. according to claim 2 a kind of in WLAN (wireless local area network) the method for shared resource, it is characterized in that, described local information Cooley upgrades with following method: the application resource of the equipment in the wireless network that exists is described preserved, to not exist the application resource of the equipment in the wireless network to describe deletion, perhaps be provided with its unconcerned content deletion according to the user.
According to claim 2 or 3 described a kind of in WLAN (wireless local area network) the method for shared resource, it is characterized in that, the user sends the resource description information that will search for described 802.11 protocol processing unit that other receives the equipment of this frame by order, described 802.11 protocol processing unit that other receives the equipment of this frame are mated the resource description information that will search that the resource description content in the described local information storehouse and user send, and the content of coupling is shown to the user.
5. according to claim 4 a kind of in WLAN (wireless local area network) the method for shared resource, it is characterized in that, the resource description information of obtaining is presented on the screen.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2005101153147A CN1968261B (en) | 2005-11-14 | 2005-11-14 | Method for resource sharing in WLAN |
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| CN2005101153147A CN1968261B (en) | 2005-11-14 | 2005-11-14 | Method for resource sharing in WLAN |
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| CN1968261A CN1968261A (en) | 2007-05-23 |
| CN1968261B true CN1968261B (en) | 2011-05-25 |
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| CN2005101153147A Expired - Fee Related CN1968261B (en) | 2005-11-14 | 2005-11-14 | Method for resource sharing in WLAN |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101296253B (en) * | 2008-05-22 | 2011-06-22 | 中兴通讯股份有限公司 | Message issuance method, system and user's set |
| CN101631358B (en) * | 2009-07-28 | 2011-12-21 | 杭州华三通信技术有限公司 | Method for transmitting data in wireless local area network and equipment thereof |
| CN101808096B (en) * | 2010-03-22 | 2012-11-07 | 北京大用科技有限责任公司 | Method for sharing and controlling large screen among local area networks in different positions |
| US9167443B2 (en) * | 2011-05-18 | 2015-10-20 | Radius Networks, Inc. | System and method for managing content exchanges in a wireless network using a listener module |
| EP3055761B1 (en) * | 2013-10-11 | 2019-08-14 | Huawei Technologies Co., Ltd. | Framework for screen content sharing system with generalized screen descriptions |
| CN105827443A (en) * | 2016-03-15 | 2016-08-03 | 成都市极米科技有限公司 | Network device discovery method and device |
| CN106095883B (en) * | 2016-06-03 | 2021-01-15 | 腾讯科技（深圳）有限公司 | Method and device for importing browser data |
| CN106818487B (en) * | 2017-02-24 | 2018-10-12 | 新沂宏志商务服务中心 | A kind of screening technique of rice high temperature resistant mutant strain |
| CN113613245B (en) * | 2021-08-19 | 2025-07-25 | 支付宝(杭州)信息技术有限公司 | Method and apparatus for managing communication channels |
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| US6031827A (en) * | 1996-10-25 | 2000-02-29 | Nokia Mobile Phones Limited | Method for radio resource control |
| US20030056002A1 (en) * | 2001-09-18 | 2003-03-20 | Trethewey James R. | Load balancing and fault tolerance for server-based software applications |
| CN1458597A (en) * | 2002-05-17 | 2003-11-26 | 联想(北京)有限公司 | Method for realizing resource share of dynamic group net |
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