CN102685856B - Wireless communication method and Wi-Fi Direct (Wireless Fidelity Direct) communication system - Google Patents
Wireless communication method and Wi-Fi Direct (Wireless Fidelity Direct) communication system Download PDFInfo
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Abstract
The invention designs a wireless communication method and system. The wireless communication system comprises a first wireless communication terminal, a second wireless communication terminal and a service set identifier (SSID), wherein the first wireless communication terminal at least supports a soft AP (access point) role, the second wireless communication terminal supports an STA (station) role, the SSID assigns a Wi-Fi Direct (Wireless Fidelity Direct) network to the first wireless communication network, and the second wireless communication terminal scans the SSID for free assignment and performs SSDI map processing on frames before two communication parties send the frames and after the two communication parties receive the frames. The Wi-Fi Direct communication terminals can be connected with each other without an AP, and the wireless communication method is based on a Wi-Fi Direct technology and adopts an SSID mapping process to effectively solve the problem that the SSID cannot be assigned freely in the Wi-Fi Direct.
Description
Technical field
The present invention relates to radio communication and wireless direct connection communication system, the particularly a kind of technology that can set up direct interconnection network without AP.
Background technology
In 802.11 series standards, Basic Service Set (basic service set) is the basic module of 802.11 networks, and Basic Service Set is divided into two kinds: independent basic service set (independent basic service set) and foundation structure type services set (infrastructure basic service set).But these two kinds of networks still can not meet user carries out demand multi-link and that access the Internet at any time, everywhere, therefore Wi-Fi(Wireless Fidelity, the certification of wireless compatibility) alliance released again new connected mode: Wi-Fi Direct(Wireless Fidelity Direct, wireless direct connection).
Wireless direct connection is the specification based on 802.11 series standards, it has following characteristics: make ordinary terminal STA(Station, client) support soft AP(Access Point, WAP (wireless access point)) role, thereby providing a kind of can make multiple terminals set up the mode of directly-connected network and then direct communication without true access point, and do not support wireless direct-connected traditional WLAN(WLAN (wireless local area network), Wireless Local Area Networks) STA also can join in the direct interconnection network of having set up with STA role, ensure a good compatibility, that it adopts in the time connecting is WPS(Wi-Fi Protected Setup, and Wi-Fi protects setting), can set up easily safe wireless network, in addition, wireless direct connection also allows the wireless direct-connected equipment of all supports connecting all to enter in due course resting state, thus save power, and in traditional WLAN, AP(Access Point, access points) can not enter resting state, and its permission equipment supports concurrent connection, a wireless device can add in multiple wireless networks with multiple identity (soft AP, STA) simultaneously.
But in wireless direct interconnection network, in order to distinguish with traditional wlan network of not supporting wireless direct interconnection network, wireless direct connection specification clearly specifies that the form of the service set SSID (Service Set Identifier) of wireless direct interconnection network can only start with letter " DIRECT-", and immediately two letters " xy " (xy can be any letter and number) can be arbitrary contents after the two.In WLAN, SSID normally user identifies the mark of place network, and often input SSID to join in corresponding network, so SSID has too many format restriction can increase the probability of makeing mistakes when user inputs, on the other hand, must start also to make SSID long with " DIRECT-", thereby cause the layout of WLAN software not attractive in appearance, and cause SSID with Chinese named, not make troubles to domestic consumer.
At present, projector equipment and wireless technology combine closely, make projector equipment effectively break away from the dependence to cable.Existing a kind of wireless projection system is as Chinese patent application 201110057730.1, it utilizes the Ad-Hoc(in 802.11 point-to-point) pattern transmits projection information, but still have following problem: once wireless terminal connects with projector equipment, just can not communicate with other wireless device, and can only communicate with this projector equipment, as can not be carried out internet access etc. simultaneously; In existing wireless projection system, can only there is the equipment of folk prescription to enter battery saving mode, projector equipment and the wireless terminal being connected with projector equipment cannot enter battery saving mode simultaneously, can not reach energy-conservation maximization; The safety of cause 802.11 standards has multinomial, and complicated operation, easily causes puzzlement to user, and user cannot set up safe connection by simple step conventionally.These inferior positions affected 802.11 with the combination of shadow casting technique.Thereby, release a kind of method of problem above that can solve and just seem particularly important.
Summary of the invention
For solving the above problems, the present invention has designed a kind of wireless communications method and a kind of wireless direct-connected communication system.
Wherein wireless communications method, based on Wi-Fi Direct, has added SSID mapping process, thereby can effectively solve the problem that in wireless direct connection, SSID can not specify arbitrarily.And the wireless direct connection communication terminal of design uses above-mentioned wireless communications method, between device, can directly connect without AP.Form wireless direct connection communication system, this system at least comprises two wireless direct connection communication terminals.The present invention is for directly connecting optical projection system, can make image processing equipment set up and directly be connected with projector equipment, simultaneously image processing equipment still can join in other network, for user provides efficiently, safety, can specify SSID and projection service that can concurrent connection.
A kind of wireless communications method, the method is based on Wi-Fi Direct, between the first wireless communication terminal and the second wireless communication terminal, adopt wireless direct connected mode to communicate, in the frame processing procedure of Wi-Fi Direct, add SSID mapping process, can directly between the SSID of linking format and the SSID of user or any appointment of system, change, the SSID of direct interconnection network can, by User Defined, be started and be not limited to " DIRECT-".
Wherein said the first wireless communication terminal and the second wireless communication terminal are all operated in direct connection mode.And the first wireless communication terminal is at least supported soft AP role, and the second wireless communication terminal is at least supported STA role.
In the first wireless communication terminal side, system or user be the service set SSID of specific radio direct interconnection network arbitrarily, the second wireless communication terminal scans this and specifies arbitrarily SSID, all needs that frame is carried out to SSID mapping and process before communicating pair sends and after receiving.For the frame of processing through mapping, at transmit leg, the SSID of direct linking format is mapped as to system or the user SSID of appointment arbitrarily; Recipient, the SSID specifying is arbitrarily mapped as to the SSID of direct interconnection network form in frame.
The step of above-mentioned wireless communications method SSID mapping is:
A) the first wireless communication terminal obtains the SSID of user or system appointment, is specified arbitrarily by system or user; The second wireless communication terminal scanning obtains the specified SSID of the first wireless communication terminal;
A) adopt message digest algorithm to obtain the character string of a regular length to the SSID specifying;
B) letter " Direct-" and above-mentioned character string are merged, obtain the SSID of direct linking format;
C) preserve the corresponding relation between the SSID of above-mentioned appointment and the SSID of direct linking format;
D) carry out frame exchange, in judgment frame, whether comprise wireless direct interconnection network SSID information element.For receiving the frame that comprises direct interconnection network SSID, according to above-mentioned appointment SSID and the direct corresponding relation of the SSID of linking format, the SSID of appointment is arbitrarily replaced with to the SSID of direct interconnection network form; And comprise direct interconnection network SSID frame for what will send, the direct SSID of linking format is replaced with to the SSID of any appointment.
The invention allows for a kind of wireless direct connection communication system, this system comprises two Terminal Types, and between terminal, communication adopts aforementioned wireless communications method to realize the direct connection between equipment.This two Terminal Type is: the first wireless communication terminal and the second wireless communication terminal.Between multiple wireless communication terminals, can set up direct interconnection network, and the SSID of direct interconnection network can specify arbitrarily.Wireless direct connection communication terminal serves as role's difference and the different module that comprises according to it.
For without serving as soft AP's, only serve as the wireless direct connection communication terminal of STA, it comprises: MAC Address multiple entity administration module, for wireless direct connection communication terminal generates, preserves, manages multiple MAC entities, in MAC entity, one is traditional wlan network service, another MAC entity is direct interconnection network service, thereby provides concurrent connection for the first wireless communication terminal; Scanning search module, for aforementioned wireless direct connection communication terminal provides the ability of finding its wireless terminal, can adopt the method in Wi-Fi Direct; Soft AP determination module, another wireless communication terminal of being responsible for finding with it consults to determine which wireless communication terminal serves as soft AP, definite according to can be the hardware handles ability of communication terminal and the control ability of software; WPS administration module, adopts Wi-Fi protection that Rapid Establishment between control appliance is set and connects safely; Authentication information memory module, stores it for wireless direct connection communication terminal and uses Wi-Fi protection setting to be connected safely security related information used with another wireless communication terminal Rapid Establishment of its discovery, as the information such as certificate, key; SSID identification module, according to the information element identifier of the network type identifier in frame and SSID, for wireless direct connection communication terminal provides the function that whether contains wireless direct interconnection network SSID information element in the identification frame that its reception sends; SSID mapping block, realizes the SSID of direct linking format and specifies the conversion between SSID, the problem that must start with " DIRECT-" to solve SSID; Power supply energy-saving module, it adopts the power supply energy-efficient protocol of wireless direct connection definition, so that the equipment connecting all can enter energy saver mode.
For the wireless direct connection communication terminal that serves as soft AP, need to comprise the module that above-mentioned wireless direct connection communication terminal that serves as STA role comprises: MAC Address multiple entity administration module, scanning search module, soft AP determination module, WPS administration module, authentication information memory module, SSID identification module, SSID mapping block, power supply energy-saving module.Also comprising DynamicHost protocol DHCP (Dynamic Host Configuration Protocol) administration module is set, is the STA automatic IP address allocation connecting with the above-mentioned wireless soft AP role who is directly connected communication terminal; Bridging management module, for soft AP role and the STA role of wireless direct connection communication terminal provide bridging functionality.When the STA role of wireless direct connection communication terminal is connected with entity A P and when addressable the Internet, so that be directly connected other device that the soft AP role of communication terminal connects and also can access the Internet by wireless direct connection communication terminal with wireless.
Above-mentioned the first wireless communication terminal at least will provide the function of soft AP, and it adopts the GO(Group Owner defining in Wi-Fi Direct, master control node) method, in wireless direct connection communication system, serve as soft AP role; The second wireless communication terminal at least provides STA function, it adopts the Client(client defining in Wi-Fi Direct) method, in wireless direct connection communication system, serve as the role of common STA, use SSID mapping to process, the object that can specify arbitrarily to reach SSID.The first wireless communication terminal can serve as soft AP and STA role in wireless direct connected system simultaneously, wherein soft AP role can be the function that other wireless communication terminal in wireless direct connected system provides entity A P to have, and the STA role of the first wireless communication terminal can be the first wireless communication terminal provide access other infrastructure network (as traditional wlan network) function, thereby realize concurrent connection, for reaching above-mentioned functions, comprise the module that the aforementioned wireless direct connection communication terminal that serves as soft AP comprises: MAC Address multiple entity administration module, scanning search module, soft AP determination module, WPS administration module, authentication information memory module, SSID identification module, SSID mapping block, power supply energy-saving module, DHCP administration module, bridging management module.
The second wireless communication terminal and the first wireless communication terminal are set up direct interconnection network, and it serves as STA role in network, and therefore it at least will provide the support to STA role, and it is optional to wireless direct-connected support.Whether the second wireless communication terminal comprises different modules according to it to the support of direct interconnection network.
In the time that above-mentioned the second wireless communication terminal is not supported wireless direct connection, it at least comprises: WPS administration module, and it adopts Wi-Fi protection to arrange and being connected of another equipment Rapid Establishment safety; Authentication information memory module is that the second wireless communication terminal is stored it and used Wi-Fi protection setting to be connected safely security related information used with another wireless communication terminal Rapid Establishment of its discovery, as the information such as certificate, key.Now the second wireless communication terminal can only serve as the role of STA, in wireless direct connected system, uses WPS to connect with the soft AP role of above-mentioned the first wireless communication terminal.
When the second wireless communication terminal support wireless while directly connecting, the module that its module comprising comprises for aforementioned wireless direct connection communication terminal that serves as STA: MAC Address multiple entity administration module, scanning search module, soft AP determination module, WPS administration module, authentication information memory module, SSID identification module, SSID mapping block, power supply energy-saving module.
In above-mentioned wireless direct connected system, the first radio communication and the second wireless communication terminal adopt aforementioned wireless communications method to communicate.And for the communication terminal of supporting Wi-Fi Direct, need process through aforementioned SSID mapping, and for the conventional communication terminals of not supporting Wi-Fi Direct, because it there is no the restriction to direct linking format SSID, therefore without shining upon and process through SSID.
Wireless direct connected system of the present invention can be used for optical projection system, and it comprises the image transmission apparatus that displayable image source is provided and the projector equipment of being responsible for showing image.Above-mentioned image transmission apparatus adopts the image that aforementioned wireless communications method will be thrown in it to send wireless signal to above-mentioned projector equipment, is carried out the reproduction of image by projector equipment.In above-mentioned wireless direct connection optical projection system, above-mentioned image transmission apparatus and above-mentioned projector equipment all at least comprise aforementioned wireless direct connection communication terminal.And among the wireless direct connection communication terminal that both comprise, have at least a side that soft AP function is provided, provide safeguard for both set up direct interconnection network.
Above-mentioned image transmission apparatus possesses the ability that gathers its content that need to show, and can be needing displaying contents to be converted to direct connection wireless signal, by adopting above-mentioned wireless direct connection communication means to be transferred to above-mentioned projector equipment.In above-mentioned wireless direct connection optical projection system, image transmission apparatus is not only limited to PC, and also notebook computer, smart mobile phone, intelligent television etc. can be processed the wireless device of image.Wireless display equipment can be the wireless device that projecting apparatus, display, intelligent television, LED display etc. can present image.
The present invention has designed a kind of wireless communications method and wireless direct connection communication system, owing to having added, SSID is shone upon to the process of processing, make the user can self-defined SSID, thereby effectively solve the problem that in wireless direct connection, SSID can not specify arbitrarily, increased user and use the convenience of wireless direct interconnection technique.And having designed one based on wireless direct-connected communication terminal simultaneously, the communication means of this communication terminal adopts wireless direct connection communication means, between communication terminal, can directly connect without AP.Ensure that for wireless direct connection optical projection system image processing equipment is directly connected without AP with projector equipment, image processing equipment still can join in other network simultaneously.The present invention has increased user and has used the convenience of wireless direct interconnection technique.
Brief description of the drawings
Figure 1 shows that wireless communications method mapping flow chart;
Figure 2 shows that wireless direct connection communication system pie graph;
Fig. 3 is wireless communication terminal composition diagram;
Figure 4 shows that the application scenarios figure of wireless direct connection communication system;
Figure 5 shows that one of wireless direct connection optical projection system application;
Figure 6 shows that two of wireless direct connection optical projection system application.
Embodiment
For further setting forth the present invention for adopted method and the technology of achieving the goal, below in conjunction with concrete accompanying drawing and example, wireless communications method proposed by the invention and wireless direct connection communication system step are described in detail.
As shown in Figure 1, this Figure illustrates the mapping handling process schematic diagram of wireless communications method.Comprise the first wireless communication terminal and the second wireless communication terminal.Wherein the first wireless communication terminal serves as the soft AP role in Wi-Fi Direct, and the second wireless communication terminal serves as the STA role in Wi-Fi Direct.In the time that carrying out receiving frame, both need adopt the step in Fig. 1 to process frame, the object that can specify arbitrarily to realize SSID.
For the first wireless communication terminal, it serves as soft AP role, therefore can specify SSID by system or user at this end, but wireless direct connection can only be identified the SSID with " Direct-" beginning, so the SSID specifying need to be mapped as to the SSID of direct linking format.And for the second wireless communication terminal, the scanning process of its communication Wi-Fi Direct can obtain the appointment in the first wireless communication terminal, the SSID specifying need to be mapped as to the SSID of direct linking format.The first wireless communication terminal is the same with the mapping process of the second wireless communication terminal, and this mapping process is:
Obtain the SSID being specified by user or system, the SSID specifying is carried out to message digest algorithm, as MD5(Message-Digest Algorithm 5) algorithm, can obtain the character string of a regular length, after the SSID specifying is carried out to MD5 computing, can obtain two of 128 (16 bytes) length and carry out value processed, and the extreme higher position 0 of these 16 bytes, corresponding 16 the ASCII character values of these 16 bytes." Direct-" is connected with 16 ASCII character values that obtain, obtains the SSID of direct linking format.The SSID of appointment and the SSID of the direct linking format obtaining are kept in structure struct CommonSSID, to determine both corresponding relations.
Once obtain the corresponding relation of direct linking format SSID and specified format SSID, just can replace the SSID in frame in follow-up frame transmittance process.At the first wireless communication terminal and the second wireless communication terminal, for the frame that will send, specifically adopt with the following method:
A) frame is resolved, according to the identifier of SSID information element, take out the SSID of the direct linking format in frame;
B) in structure struct CommonSSID, find the SSID of direct linking format, and take out the SSID specifying arbitrarily in structure;
C) also with the appointment SSID finding, the SSID of the direct linking format in frame is replaced;
D) frame after replacing is sent.
And for the frame receiving, specifically adopt with the following method
A) frame is resolved, according to the identifier of SSID information element, take out the SSID of any appointment in frame;
B) in structure struct CommonSSID, find the SSID of any appointment, and take out in structure the SSID of corresponding with it direct linking format;
C) also with the direct linking format SSID finding, the SSID of the appointment in frame is replaced;
D) give lower one deck processing the frame after replacing.
Be illustrated in figure 2 wireless direct connection communication system pie graph.System comprises the first wireless communication terminal that serves as soft AP and the second wireless communication terminal that serves as STA, wherein, the first wireless communication terminal can only have one, the second wireless communication terminal can be by multiple, and the second wireless communication terminal can support direct interconnection technique also can not support direct interconnection technique.
Be illustrated in figure 3 wireless communication terminal composition diagram.As the first wireless communication terminal, support Wi-Fi Direct and serve as soft AP role.Comprise MAC Address multiple entity administration module, scanning search module, soft AP determination module, WPS administration module, authentication information memory module, power supply energy-saving module to support Wi-Fi Direct.SSID identification module and SSID mapping block complete radio communication.DHCP administration module is in charge of Dynamic Host Configuration Protocol server, to provide IP address for the second wireless communication terminal.Bridging management module is responsible for setting up bridge joint between the STA role of the first wireless communication terminal and AP role, in the time that the STA role of the first wireless communication terminal is connected to the Internet, the second wireless communication terminal being connected with the soft AP role of the first wireless communication terminal can be by this bridging functionality access the Internet.
For the second wireless communication terminal in wireless direct connection communication system, if when this second wireless communication terminal is also supported directly to connect, terminal structure as shown in Figure 2, comprise: MAC Address multiple entity administration module, scanning search module, soft AP determination module, WPS administration module, authentication information memory module, power supply energy-saving module, to support Wi-Fi Direct.SSID identification module and SSID mapping block are realized wireless communications method.The second wireless communication terminal uses aforementioned wireless communications method and the first wireless communication terminal to set up direct interconnection network, and can specify arbitrarily SSID.
If when the second wireless communication terminal is not supported directly to connect, it is traditional WLAN terminal, and STA role can only be provided.It should at least comprise: WPS administration module, authentication information memory module.Now it uses Wi-Fi protect the method in arranging and be linked into the soft AP role in the first wireless communication terminal.
Figure 4 shows that the application scenarios figure of wireless direct connection communication system.
In Fig. 4, notebook and PDA(Personal Digital Assistant, personal digital assistant) all support wireless direct interconnection technique, and projecting apparatus is not supported wireless direct interconnection technique.Wherein support direct-connected notebook to serve as soft AP and STA role, and the STA role of notebook is connected simultaneously with entity A P, sets up traditional wlan network and connect; The soft AP role of notebook provides AP function for other terminal in network, makes other terminal without being directly connected on notebook through AP.For supporting direct-connected PDA, it serves as multiple STA roles simultaneously, and what make that it can be concurrent is connected in the direct interconnection network that traditional wlan network and notebook provide.For not supporting direct-connected traditional WLAN projecting apparatus, it can directly connect with the direct-connected notebook of support simultaneously.
In the present embodiment, notebook and PDA, notebook and projecting apparatus do not communicate by AP, they are that wireless communications method by proposing in the present invention connects, by direct interconnection technique, under the environment that there is no AP, notebook and PDA, notebook and projecting apparatus can direct communications, even between PDA and projecting apparatus, also can communicate by the soft AP role of notebook.And the SSID of the direct interconnection network that notebook provides is without starting with " DIRECT-".And for not supporting direct-connected traditional WLAN projecting apparatus in the present embodiment, because itself not supporting direct interconnection network, so also just there is no the restriction of SSID form aspect, therefore also with regard to not needing, frame is carried out to extra processing.Its processing procedure only need be followed the standard procedure of WLAN.
In the present embodiment, wireless direct connection optical projection system at least comprises: image transmission apparatus and a wireless display equipment.Wherein image transmission apparatus and wireless display equipment at least should have a side will comprise the aforesaid wireless direct jockey that serves as soft AP, image transmission apparatus and wireless display equipment are set up direct interconnection network by aforesaid wireless direct method of attachment, and then transmission data, without the interference of AP.
The aforementioned wireless direct jockey that image transmission apparatus and wireless display equipment at least should have a side to comprise, image transmission apparatus and wireless display equipment can arbitraryly serve as soft AP role by it, and the wireless direct jockey that therefore image transmission apparatus and wireless display equipment comprise has multiple combination.In the present embodiment, working as soft AP with image transmission apparatus and wireless display filling apparatus respectively illustrates.
As shown in Figure 5, image transmission apparatus serves as soft AP.In Fig. 5, notebook and projecting apparatus all comprise aforementioned wireless direct jockey, and the notebook computer wireless direct connection of support is also served as soft AP role, and projecting apparatus only serves as STA role.Projecting apparatus joins in the straight-forward network of notebook foundation, and then carries out image transmitting.And now notebook provides DHCP and bridging functionality, and in other network that the STA role of notebook still can join, carry out the access of the Internet.
As shown in Figure 6, wireless display filling apparatus is as soft AP.In Fig. 6, wireless display filling apparatus is as soft AP role.The wireless direct connection of support of wireless display equipment is also served as soft AP role, and projecting apparatus is supported wireless direct connection and only served as STA role.Notebook joins in the wireless direct interconnection network of projecting apparatus foundation, carries out image transmitting.And now projecting apparatus provides DHCP function, and in other network that another STA role of notebook still can join, carries out the access of the Internet.
Be only preferential execution mode of the present invention above, all combinations of carrying out under method used in the present invention or change, be all interpreted as in claim of the present invention.
Claims (7)
1. a wireless communications method, it is characterized in that, the first wireless communication terminal and the second wireless communication terminal are operated in direct connection mode, the first wireless communication terminal is at least supported soft wireless access point AP role, and the second wireless communication terminal is supported client STA role, system or user are arbitrarily the service set SSID of the first wireless communication terminal specific radio direct interconnection network, the second wireless communication terminal scans this appointment SSID, before communicating pair sends and after receiving, frame is carried out to SSID mapping and processes; At transmit leg, the SSID of direct linking format is mapped as to system or the user SSID of appointment arbitrarily, recipient, the SSID specifying arbitrarily in frame is mapped as to the SSID of direct linking format, described SSID mapping is processed and is specifically comprised: the first wireless communication terminal obtains the SSID of user or system appointment, the second wireless communication terminal scanning obtains the SSID that the first wireless communication terminal obtains, and adopts message digest algorithm to obtain the character string of a regular length to the SSID specifying; " Direct-" merged with above-mentioned character string, obtain the SSID of direct linking format, preserve corresponding relation between the SSID of above-mentioned appointment and the SSID of direct linking format in structure.
2. wireless communications method according to claim 1, is characterized in that, in follow-up frame transmittance process, the SSID in frame is replaced, for the frame that will send, frame is resolved, according to the identifier of SSID information element, take out the SSID of the direct linking format in frame; In structure, find the SSID of direct linking format, and take out the SSID of any appointment corresponding in structure; And with specifying SSID that the SSID of the direct linking format in frame is replaced; Frame after replacing is sent.
3. wireless communications method according to claim 1, it is characterized in that, to the frame receiving, frame is resolved, according to the identifier of SSID information element, take out the SSID specifying arbitrarily in frame, in structure, find the SSID specifying arbitrarily, take out in structure the SSID of corresponding direct linking format with it, and the SSID specifying in frame is replaced with direct linking format SSID.
4. wireless communications method according to claim 2, it is characterized in that, in frame exchange, in judgment frame, whether comprise the SSID information element of wireless direct linking format, for receiving the SSID frame that comprises direct linking format, according to mapping relations, the SSID specifying is arbitrarily replaced with to the SSID of direct linking format, for the SSID frame that comprises direct linking format that will send, according to mapping relations, the SSID of direct linking format is replaced with to the SSID of any appointment.
5. a wireless direct communication system, it is characterized in that, comprise the first wireless communication terminal and the second wireless communication terminal, between multiple wireless communication terminals, set up direct interconnection network, and the service set SSID of direct interconnection network specifies arbitrarily, the first wireless communication terminal can serve as soft wireless access point AP and client STA role simultaneously, the second wireless communication terminal serves as STA role, use SSID mapping to process, realize any appointment of SSID, wherein, the soft AP role of the first wireless communication terminal provides entity A P for other wireless communication terminal in wireless direct connected system, STA role for the first wireless communication terminal provide access other infrastructure network ability, realize concurrent connection, described SSID mapping is processed and is specifically comprised: the first wireless communication terminal obtains the SSID of user or system appointment, the second wireless communication terminal scanning obtains the SSID that the first wireless communication terminal obtains, and adopts message digest algorithm to obtain the character string of a regular length to the SSID specifying, letter " Direct-" in service set and above-mentioned character string are merged, obtain the SSID of direct linking format, preserve the corresponding relation between the SSID of above-mentioned appointment and the SSID of direct linking format.
6. wireless direct communication system according to claim 5, it is characterized in that, for the second wireless communication terminal that only serves as STA, comprise: MAC Address multiple entity administration module, for system generates, preserves, manages multiple MAC entities, for the first wireless communication terminal provides concurrent connection; Scanning search module is searched other wireless devices; Soft AP determination module consults to determine which wireless communication terminal serves as soft AP; Between WPS administration module control appliance, Rapid Establishment connects safely; Authentication information memory module is wireless direct connection communication terminal storage security information; SSID identification module is according to the information element identifier of the network type identifier in frame and SSID, for system provides in its frame that receives, sends of identification whether contain wireless direct interconnection network SSID information element; SSID mapping block is the SSID of direct linking format and specifies between SSID and change.
7. wireless direct communication system according to claim 5, it is characterized in that, when the first wireless communication terminal also needs to serve as soft AP role, terminal further comprises: DHCP administration module: be connected STA automatic IP address allocation, bridging management module provides bridging functionality for soft AP role and STA role.
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| CN102196418A (en) * | 2010-03-09 | 2011-09-21 | 精工爱普生株式会社 | Wireless communication system, wireless communication device, projector, and wireless communication method |
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| CN101278522A (en) * | 2005-10-05 | 2008-10-01 | 高通股份有限公司 | Peer-to-peer communication in AD HOC wireless network |
| CN102196418A (en) * | 2010-03-09 | 2011-09-21 | 精工爱普生株式会社 | Wireless communication system, wireless communication device, projector, and wireless communication method |
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