CN102907125B - The method and apparatus that peer finds in cordless communication network - Google Patents

Abstract

The apparatus and method that peer finds in communication network, are configured to mark including generation and have the discovery request of peer device of tunnelling direct link foundation (TDLS) ability, transmission finds request and determine whether that asking to receive discovery in response to this discovery responds.On the one hand, these apparatus and method can be by the request encapsulation of discovery in a data frame so that this discovery asks for access point to be transparent.In other respects, these apparatus and method can form discovery request by TDLS ability information is attached to probe requests thereby.It addition, these apparatus and method can comprise determining whether to receive discovery response in response to this discovery request.Thus, these apparatus and method provide deterministic method of peer discovery, in order to the list of the potential peer with TDLS ability is available before can setting up attempting TDLS direct link.

Description

The method and apparatus that peer finds in cordless communication network

Priority request according to 35U.S.C. § 119

Entitled " the METHOD AND that patent application claims was submitted on November 4th, 2009 APPARATUS FOR MULTI-PROTOCOL DEVICE DISCOVERY IN WIRELESS LOCAL AREA NETWORKS (WLAN) is (for WLAN (WLAN) Middle multi-protocols equipment find method and apparatus) " provisional application No.61/258,131 and in 2010 1 Entitled " the METHOD AND APPARATUS FOR MULTI-PROTOCOL that the moon 5 was submitted to DEVICE DISCOVERY IN WIRELESS LOCAL AREA NETWORKS(WLAN) (in WLAN (WLAN) multi-protocols equipment find method and apparatus) " provisional application No.61/292, the priority of 395, its both transfers present assignee and clearly includes in by quoting In this.

Background

Field

The disclosure relates generally to the apparatus and method that equipment finds in cordless communication network, and the disclosure is outstanding It relates to the peer device in wlan system based on IEEE 802.11 agreement (WiFi) and finds.

Background

In many telecommunication systems, communication network is used between several the most separate interactive devices Exchange message.Various types of networks can be classified by different aspect.In one example, the geography of network Scope can cover wide area, metropolitan area, local or individual territory, and corresponding network will be named as wide area network (WAN), Metropolitan Area Network (MAN) (MAN), LAN (LAN) or individual territory net (PAN).Network exists For interconnecting the exchange/route technology aspect of various network node and equipment, (such as, circuit switching is relative to dividing Group exchange), for transmission physical medium type in terms of (such as, wired relative to wireless) or In terms of the communication protocol collection used (such as, Internet protocol collection, SONET (synchronous optical networking), Ethernet etc.) the most different.

One key property of communication network is to wired or nothing for transmitting telecommunication number between the constituent element of network The selection of line medium.In the situation of cable network, use such as copper cash, coaxial cable, fiber optic cables etc. Tangible physical medium propagates the guidance electromagnetic waveforms carrying message traffic on certain distance.Cable network is quiet The communication network of state form and for the interconnection of fixed network element or for batch data transmits logical It is often dominant.Such as, fiber optic cables are handled up for the highest in distance between catenet maincenter For amount transmission application (the most at the earth's surface across continent or the bulk data transfer between continent) often It it is preferred transmission medium.

On the other hand, if when network element is mobile and has dynamic connectivity demand or the network architecture Be formed with self-organizing (ad hoc) rather than fixing topology in the case of, wireless network is the most preferably 's.Wireless network uses the electromagnetic wave in the frequency bands such as radio frequency, microwave, infrared, optical frequency with non-guidance propagating mode Formula uses invisible physical medium.Wireless network is unique promotion user mobility compared with fixing cable network The advantage disposed with rapid field.But, use radio transmission to need to carry out between the network user significantly Actively resource management and compatible spectrum utilization is carried out the mutually coordinated of higher degree and cooperation.

General introduction

Given below one or more aspect is simplified summarize basic with try hard to provide in terms of this type of Understand.This summarizes the extensive overview of the not all aspect contemplated, and is both not intended to identify all sides Key or the decisive key element in face is the most non-attempts to define the scope in terms of any or all.Its unique purpose It is intended to provide in simplified form some concepts in terms of one or more using as more tool given later The sequence of the explanation of body.

On the one hand, a kind of method that in communication network, peer finds, it is configured to mark including generation and has The discovery request of the peer device of tunnelling direct link foundation (TDLS) ability, transmission find to ask and true Determine whether to receive the discovery response asked in response to this discovery.

On the other hand, it is configured to perform at least one processor that in communication network, peer finds include using The discovery being configured to the peer device that mark has tunnelling direct link foundation (TDLS) ability in generation please The first hardware module asked.Further, this at least one processor includes for transmitting find to ask second Module, and be used to determine whether to receive the three module finding response asked in response to this discovery.

In further aspect, a kind of computer program that peer finds in communication network includes non- Transitory computer-readable medium, it includes performing for making computer generate to be configured to mark to have tunnelling Direct link sets up the first code collection finding request of the peer device of (TDLS) ability.This is non-temporarily State computer-readable medium farther includes to perform the second filial generation for making computer transmit the request of discovery Code collection, and can perform for making computer determine whether to receive the discovery asked in response to this discovery to respond Third generation code collection.

On the other hand, a kind of device that peer device finds in communication network includes for generating configuration Become mark have tunnelling direct link set up (TDLS) ability peer device find request device, For transmitting the device of the request of discovery and being used to determine whether to receive the discovery response asked in response to this discovery Device.

In additional aspect, a kind of customer station equipment that peer device finds in communication network includes findings that please Seeking survival grow up to be a useful person with generate be configured to mark have tunnelling direct link set up (TDLS) ability peer device Discovery request, communications component with transmit find request and find in response to determining that device is to determine whether to receive response In the discovery response that this discovery is asked.

Additionally, additional aspect can include a kind of side finding request for detection and response as described in this article Method.Further aspect in this regard comprises the steps that and includes performing detection and responding the module of the request of discovery extremely A few processor；Including the computer program of computer-readable medium, this computer-readable medium bag Include the instruction that can perform to find by computer request with detection and response；Or include finding for detection and response The device of request or the equipment of assembly.

For addressing relevant purpose before reaching, this one or more aspect is included in and is hereinafter fully described also The feature particularly pointed out in the following claims.It is one or more that the following description and drawings illustrate this Some illustrative aspects of individual aspect.But, these features only indicate and can use the former of various aspect Several in the various modes of reason, and this descriptions be intended to this type of aspects all and equivalent aspect thereof.

Accompanying drawing is sketched

Below with reference to accompanying drawing, disclosed aspect is described, it is provided that accompanying drawing illustrates that and non-limiting institute is public The aspect opened, label similar in accompanying drawing indicates similar elements, and wherein the dotted line around ingredient indicates optionally Element, and wherein:

Fig. 1 is the one side including realizing the cordless communication network at the station of discovery agreement described herein Schematic diagram；

Fig. 2 is the block diagram of the one side of the probe requests thereby that can use in the one side of the system of Fig. 1；

Fig. 3 is the block diagram of the one side of the probe response that can use in the one side of the system of Fig. 1；

Fig. 4 is the one side of the form of base station set identifier (BSSID) element used in the system of Fig. 1 Block diagram；

Fig. 5 is the block diagram of the one side of the form of the associated element used in the system of Fig. 1；

Fig. 6 is the frame of the encapsulated one side finding request that can use in the one side of the system of Fig. 1 Figure；

Fig. 7 is the frame of the encapsulated one side finding response that can use in the one side of the system of Fig. 1 Figure；

Fig. 8 be the system of Fig. 1 one side in can use there is BSSID (BSSID) The TDLS of element finds the table of the one side of the element of the form of claim frame；

Fig. 9 be the system of Fig. 1 one side in can use there is BSSID (BSSID) The TDLS of element finds the table of the one side of the element of the form of response frame；

Figure 10 is the frame of the one side of the link identifier element that can use in the one side of the system of Fig. 1 Figure；

Figure 11 is the discovery request used in the one side of the system of Fig. 1 and finds can include in response frame The table of one side of content of link identifier field；

Figure 12 is the TDLS with link identifier element that can use in the one side of the system of Fig. 1 Find the table of the one side of the element of the form of claim frame；

Figure 13 is the TDLS with link identifier element that can use in the one side of the system of Fig. 1 Find the table of the one side of the form of response frame；

Figure 14 is the block diagram of the one side of associated element, and this associated element comprises the current association about equipment Information and can use in the one side of the system of Fig. 1；

Figure 15 is the message flow that tunnelling direct link sets up that (TDLS) finds the one side of the method exchanged Figure；

Figure 16 is to set up the TDLS of request based on broadcast TDLS to find to be followed by start from clean culture TDLS and build The message flow chart of the one side that the TDLS of vertical request sets up；

Figure 17 is the table of the one side of the form of the possible frame used during TDLS finds；

Figure 18 is that broadcast finds request and the message flow chart of the direct one side finding response；

Figure 19 be clean culture find request and directly in response to the message flow chart of one side；

Figure 20 be TDLS broadcast find and found with clean culture by the response of AP and directly in response to combination The message flow chart of one side；

Figure 21 is the message flow that TDLS based on probe requests thereby and probe response finds the one side of code Figure；

Figure 22 is the message stream that TDLS based on probe requests thereby and probe response finds the another aspect of code Cheng Tu；

Figure 23 is that TDLS based on probe requests thereby and probe response (including the passback of probe requests thereby) finds The message flow chart of the another aspect of code；

Figure 24 is the flow chart of the one side of a kind of method that peer device finds in communication network；

Figure 25 is performed for tunnelling direct link in cordless communication network and sets up the station that (TDLS) finds (STA) schematic diagram of one side；And

Figure 26 is performed for tunnelling direct link in cordless communication network and sets up the station that (TDLS) finds (STA) schematic diagram of another aspect.

Describe in detail

Referring now to accompanying drawing, various aspects are described.In the following description, elaborate for explanatory purposes numerous Detail is to provide the thorough understanding in terms of one or more.It will be evident that there is no this A little details also can put into practice this type of aspect.

With reference to Fig. 1, in one example, popular radio network technique includes various types of wireless local Net (WLAN).WLAN 100 may be used for using such as WiFi or more generally IEEE 802.11 Neighbouring apparatus interconnection is got up by the widely used networking protocol of the member of wireless protocols race etc.

In one aspect, WLAN 100 is made up of various stations (STA), and these various stations are to access wireless network The assembly of network.In one example, there is a two kinds of station (STA): access point 102 and client 104, 106.It is said that in general, access point as the maincenter of WLAN or base station and client as the use of WLAN Family.Such as, client can be laptop computer, personal digital assistant (PDA), mobile phone etc.. In one example, client is via the wireless link following WiFi (such as, IEEE 802.11 agreement) It is connected to access point to acquire the Internet or the general connectedness to other wide area network.

In one aspect, 802.11 wireless networks can work with both of which: infrastructure mode and self-organizing Pattern.In infrastructure mode, client or station (STA) are connected to as by other wireless visitor Family end is connected to the access point (AP) of the maincenter of network infrastructure (including that such as the Internet accesses).Base Infrastructure mode uses client server architecture to provide connectedness to other wireless client.From group Knitting in pattern, wireless client has to being directly connected to each other in peer-to-peer architecture.In one aspect, 802.11 wireless networks generate wireless network characteristic (such as, maximum data rate, encrypted state, AP MAC Address, SSID etc.) it is broadcast to the cyclic beacon signal of client near all.Such as, SSID mark Know ad hoc wireless networks.The acronym list of some terms used is given at this.

Acronym list

AP access point

A1 address 1

A2 address 2

A3 address 3

BSS Basic Service Set

BSSID BSSID

DTIM delivers traffic indication map

IE information element

IEEE institute of electrical and electronic engineers

L2 layer 2

MAC medium education

OUI organizes unique identification

P2P equity

SNAP subnetwork access protocol

SSID service set identifier

STA stands

TDLS tunnelling direct link is set up

TSF timing synchronization function

WFA WiFi alliance

WFD WiFi shows

WiFi Wireless Fidelity

In one aspect, wireless protocols IEEE 802.11z definition allows and identical access point (AP) phase Wireless 802.11 stations (STA) of association set up direct link (the most wireless peer to peer connection) between which Agreement.This agreement is referred to as tunnelling direct link and sets up (TDLS).TDLS sets up message and is encapsulated in specific EtherType (Ethertype) in, in order to they can be tunneled through any AP.In one example, EtherType is the field in ethernet frame, agreement encapsulated in instruction frame payload.This is especially to have , upgrade because AP is not necessarily the TDLS to use between two STA.TDLS is straight Chain link road can be set up and without the AP that upgrades between two STA with TDLS ability.

At present, during TDLS supposes identical Basic Service Set (BSS) (such as, with identical AP phase Association) being the discovery that based on detection resources and destination-address and send TDLS and set up request of other STA And without the priori of the ability about target peer STA.However, it is expected that have higher deterministic Discovery method, in order to the list of the potential peer STA with TDLS ability can be straight at trial TDLS Can use before connecing link establishment.

Correspondingly, referring back to Fig. 1, on the one hand, described apparatus and method are included in such as client The Peer discovery component 108 at one or more station of end 104 and 106 etc, with management to one or The discovery of other peer STA more also communicates with one or more other peer STA.On the one hand, Such as, Peer discovery component 108 can be to perform so that finding one or more peer STA And initiate and/or set up the hardware of TDLS direct link 109, software, firmware, executable instruction or data One of or any combination.On the one hand, Peer discovery component 108 can include being configured to the request that generates about The discovery request generator 110 finding request 112 of the information of potential peer STA.Such as, on the one hand, Find that request 112 can include the discovery claim frame with specific format, and this discovery claim frame can be packaged to Just transparent transmission passes through another STA (such as access point 102), and this will discuss in further detail below.Enter One step, such as, at a different aspect, find that request 112 can include or be attached to as equity (P2P) Find probe requests thereby or the beacon of the part transmission of agreement.In this case, for example, it was discovered that ask 112 Can include that TDLS ability indicates, and optionally can include related information, this will discuss in further detail below.

It is configured to determine whether to have been received by finding response additionally, Peer discovery component 108 can comprise additionally in The discovery of 116 is in response to determining that device 114.On the one hand, for example, it was discovered that response 116 can include, maybe can carry For providing one or more peer STA finding response 116 (the most one or more to be sent out for determining Existing station) TDLS ability instruction 118 inference.This station being found is regarded as peer device. The TDLS of the STA that the instruction of TDLS ability 118 can be used for identifying the STA with TDLS ability, identified Ability and/or communicate (such as TDLS direct link 109) for setting up TDLS with the STA identified Other parameter any.

It is configured to such as based on receiving from another STA it addition, Peer discovery component 108 can comprise additionally in Find request 112 and generate find response 116 discovery response maker 120.In other words, STA 106 Operable find response maker 120 with generate find response 116 reply receive from STA 104 send out Now ask 112.Alternatively, or it addition, STA 104 is operable finds that response maker 120 is to generate the Two find that response is rechecked back and forth measures or receives the second discovery request from another equipment.

Additionally, Peer discovery component 108 can farther include peer-to-peer communications initiator 122 to set up with another The communication of one peer STA.Such as, on the one hand, peer-to-peer communications initiator 122 include agreement with based on Find that the STA information 118 received in response 116 is initiated or performs to communicate with the TDLS of another STA Foundation.

Such as, in the case of figure 1, if the discovery that STA 104 transmits asks 112 by STA 106 Receive, then STA 106 can generate discovery response 116 and transmit discovery response 116 to be received by STA 104. Indicating 118 based on TDLS ability, then STA 104 can set up the TDLS direct link with STA 106 109。

Thus, the apparatus and method of described aspect provide higher deterministic discovery method, in order to have The list of the potential peer STA of TDLS ability is available before can setting up attempting TDLS direct link.

In one aspect, (TDLS) etc is set up along with such as equity (P2P) and tunnelling direct link For the appearance of the new connection type of WiFi equipment, need the equipment on multiple connection protocol and service discovery. Find to refer to readily available to wireless device or the computer protocol of the access of service.TDLS is at IEEE Defined in 802.11z agreement.Equity (P2P) agreement is currently also referred to as Wireless Fidelity (WiFi) alliance (WFA) Guide.TDLS and P2P likely becomes the transmission mechanism showing (WFD) for WFA.WFD is For the WFA authenticating tag with display wireless connections.

With reference to Fig. 2 and 3, in one aspect, Peer discovery component 108 (Fig. 1) can be by P2P Equipment finds that incidentally TDLS discovery realizes the discovery of potential TDLS peer device.P2P equipment finds Be based on the P2P equipment on so-called social channel between probe request/probe response exchange.For by right Find, Deng side, the purpose that the TDLS peer STA that assembly 108 (Fig. 1) performs finds, find request 112 And/or find that response 116 can include including the TDLS ability instruction 119 corresponding with requesting party STA respectively And/or the TDLS ability corresponding with responder STA indicates probe request 130 and/or the detection of 118 Response frame 132.

In one aspect, corresponding TDLS ability instruction 118 or 119 can be capabilities element 134 respectively Or the part of 136.Such as, in the case of capabilities element 134 or 136 includes extended capability element, Corresponding TDLS ability instruction 118 or 119 can be a bit within extended capability element.Enter one Step, such as, TDLS capability bit can be the bit 37 of the capable field of extended capability element.At another In example, if TDLS is the pressure part of WFD certification, then TDLS ability instruction 118 or 119 Can not exist physically, but can refer to from the WFD ability that probe request/response frame 130/132 includes Show that 138 or 140 release.In also having another example, TDLS ability instruction 118 or 119 can be from such as The list of the certain types of capabilities element 134 or 136 that can include in probe request/response frame 130/132 etc Only TDLS capabilities element is released.

Equity (P2P) finds that code also can produce the AP being currently associated with the equipment with TDLS ability BSSID (BSSID).In one aspect, the basic service in IEEE 802.11 agreement Collection is made up of an access point (AP) and all stations (STA) being associated.To this end, with reference to Fig. 2 and 3, Current BSSID 146 or 148 corresponding with requesting party or responder STA respectively can be with BSSID element The form of 142 or 144 is included in a part that P2P finds and the probe request/response frame that transmits In 130/132.

With reference to Fig. 4, such as it is used for the BSSID element lattice of the BSSID element 142 or 144 of Fig. 2 and 3 The example of formula 200 includes following:

● Element ED field 202 identifies BSSID element, such as 802.11-2007 protocol definition Defined in table 7-26

● length field 204 is set as 6

● BSSID field 206 is set as the MAC Address of the AP that STA is currently associated with.

Out of Memory about current association can be by including that associated element 150 or 152 is included in detection and asks Ask/respond in 130 or 132.Associated element 150 or 152 can comprise about sending probe request/response frame The information of the current association of the equipment (such as, corresponding STA) of 130 or 132.

With reference to Fig. 5, such as it is used for the associated element form 300 of the associated element 150 or 152 of Fig. 2 and 3 Example include following:

● Element ED field 302 identifies associated element, such as the table 7-26 of 802.11-2007 protocol definition Defined in

● length field 304 is set as 7+n

● BSSID field 306 is set as the MAC Address of the AP that STA is currently associated with and (notes, close The BSSID field 306 of connection element format 300 can be with the BSSID element format 200 of Fig. 4 BSSID field 206 identical)

● channel field 308 is set as the channel of this association

● ssid field 310 is set as the SSID of this association.Service set identifier SSID is the people of network The readable title of class.

In one aspect, service set identifier points out specific 802.11 wireless networks, or local or enterprise Industry.Add BSSID element 142/144 or associated element 150/152 to probe request/response 130/132 May need to define in WiFi alliance (WFA), such as a part for WFA TDLS specification, because of Do not send probe response for conventional 802.11STA, and the destination of probe requests thereby be only such as AP 102 it The AP (not being other STA, such as STA 104 or 106) of class.The P2P of complete definition in WFA In pattern, it is the part that P2P finds that probe request/response frame is sent to other STA by STA.TDLS Capability bit (such as above with respect to TDLS ability instruction 118 or 119 citation) will be by electric and electronic work SCTE (IEEE) defines, because TDLS capability bit needs the field internal controlled by IEEE The definition of individual bit.

Although should be appreciated that capabilities element 134 and 136, BSSID element 142 and 144 and associated element 150 and 152 state with reference to probe requests thereby 130 and probe response 132 respectively, but these elements also may be used It is present in the discovery request 112 of Fig. 1 and finds in response 116.In other words, the discovery request 112 of Fig. 1 Ability unit can be included in the TDLS discovery procedure not being associated with P2P discovery procedure with discovery response 116 One or more in element 134 and 136, BSSID element 142 and 144 or associated element 150 and 152 Person.

In one example, if the STA being found (STA 106 of such as Fig. 1) indicate it current with AP (AP 102 of such as Fig. 1) is associated, and scanning side STA (STA 104 of such as Fig. 1) energy Be associated with that AP, then scanning side STA can be associated with this AP and be formed with the STA being found TDLS direct link (link 109 of such as Fig. 1) rather than start P2P net with the STA being found Network.The advantage forming TDLS direct link 109 is that the concurrently access with AP is likely to more simply, and not Need to input STA that new voucher just can connect to be found (because for the voucher of this AP in scanning side It is available at STA).

In one aspect, it is desirable to be connected to the scanning side STA tool of the STA being found being associated with AP There are two options.First option is to start P2P network with the STA being found.P2P network can with In with on the same channel associated of this AP, to simplify the concurrent operations carried out by the STA being found. Second option is that scanning side STA is associated with this AP and then to set up TDLS with the STA being found direct Link.When scanning side STA has for the voucher of this AP, it is mutual that this process will need not user. When scanning side STA does not have for the security credence of this AP, this process will include user/STA with This AP is associated or by input security credence, or by button arrangement etc..Art technology Personnel are to be understood that, it is possible to use for setting up many technology of security credence and not affecting the spirit of the disclosure Or scope.

On the other hand, if scanning side STA is associated with identical AP with the STA being found at present, Then scanning side STA can be communicated by this AP (because most of AP allow their association STA Peer-to-peer communications).In one aspect, direct STA to STA communication is the most possible can be by by TDLS Find that the STA that frame (the discovery request 112 of such as Fig. 1) is sent to be found by AP tests.Example As, when the STA being found receives discovery request, it sends TDLS and finds response, such as Fig. 1's Find response 116.In one example, the Peer discovery component 108 of the scanning side STA of Fig. 1 can be tieed up Hold and find to ask 112 transmit corresponding intervalometer, and when response timeout occurs, such as when regularly When device expires, scanning side STA supposes that STA to STA communication is stopped by AP.On the other hand, STA With the security type of the link 109 between AP can (association the most in figs 2 and 3 in associated element In element 150 or 152) instruction.

With reference to Fig. 6 and 7, in one aspect, Peer discovery component 108 (Fig. 1) can be configured to generate And transmit the encapsulated request 160 that finds and/or encapsulated discovery response 162.Such as, encapsulated send out Now request 160 is relative with finding request 112 and discovery response 116 respectively with encapsulated discovery response 162 Should, find request 112 and find that response 116 is each respectively included in encapsulation 164 and 166.Such as, On the one hand, encapsulation 164 and 166 can be to allow find request 112 and find response 116 transparent conveyings By message or the frame format of another STA (such as by the access point 102 of Fig. 1).Such as, encapsulation 164 Layer 2 (L2) encapsulation can be included, but not limited to 166.Correspondingly, encapsulated discovery request 160 Find that response 162 defines two new TDLS frames for the purpose of TDLS discovery with encapsulated.

In one aspect, encapsulated TDLS finds that request/response frames 160 and 162 can include the most each From BSSID (BSSID) element 168 and 170, element 168 and 170 identifies respectively The media of the AP that the STA of transmission TDLS discovery claim frame 160 or discovery response frame 162 is associated with access Control the BSSID 172 and 174 of (MAC) address.Noting, BSSID element 168 and 170 can have The form identical with the BSSID element format 200 of Fig. 4, and/or can respectively with the BSSID of Fig. 2 and 3 Element 142 is identical with 144.

Fig. 8 explanation includes that the encapsulated TDLS of BSSID (BSSID) element 168 sends out The example of existing claim frame form 500, it such as can be used for encapsulated TDLS and finds claim frame 160.Enter One step, encapsulated TDLS finds that claim frame form 500 can include as described and can be as 502 506 Indicated in sequence various out of Memory elements 504.Further, Fig. 9 explanation includes basic service set identification Example TDLS of symbol (BSSID) element 170 finds response frame form 600, and it such as can be used for through envelope The TDLS of dress finds response frame 162.Further, encapsulated TDLS finds that response frame form 600 can Including as 606 describe and can as indicated in 602 sort various out of Memory elements 604.

Referring back to Fig. 6 and 7, it not corresponding BSSID element 168 and 170, but such as 802.11z Defined in existing link identifier element 176 and 178 can be respectively included in that encapsulated TDLS finds please In summation response frame 160 and 162.

Figure 10 explanation such as can be used for the link identification of the link identifier element 176 and 178 of Fig. 6 and 7 The example of symbol element format 700, it has and is defined below: element ID 702 identifies link identifier element； Length field 704 identification length (such as, it can be set as 18)；And address field 705, such as but not Be limited to BSSID field 706 (it can be same or similar with previously discussed BSSID field), TDLS sends out Playing STA address field 708 and TDLS responder STA address 710, side, this address field 705 is desirable Certainly it is included in, in this element, the request that finds or finds response is arranged.

Figure 11 is to include the encapsulated discovery claim frame 160 of Fig. 6 and 7 and encapsulated discovery response frame The table 800 of the exemplary contents 802 and 804 of link identifier address field 705 included in 164.

What Figure 12 explanation such as can be used for that Fig. 6 encapsulated find claim frame 160 includes link identifier Example TDLS of element 176 finds claim frame form 900.Further, encapsulated TDLS finds please Ask frame format 900 can include as 906 describe and can as indicated in 902 sort various out of Memory Element 904.

And, what Figure 13 explanation such as can be used for that Fig. 7 encapsulated find response frame 162 includes link Example TDLS of identifier elements 178 finds response frame form 1000.Further, encapsulated TDLS Find response frame form 1000 can include as 1006 describe and can as indicated in 1002 sort each Plant out of Memory element 1004.

Referring back to Fig. 6 and 7, in one aspect, encapsulated discovery claim frame 160 and encapsulated sending out Now response frame 162 is each may comprise respective associated element 180 and 182, associated element 180 and 182 Out of Memory including the current association about respective STA.Such as, associated element 180 and 182 can be wrapped Include following information, such as, but not limited to: with type (such as, the security classes of the safety on the link of AP Type), working channel, working channel bandwidth, from the current PHY speed of AP, current to AP PHY speed etc..Noting, associated element 180 and 182 can be with the associated element 150 and 152 of Fig. 2 and 3 Same or similar.

Figure 14 explanation comprises the example of the associated element form 1100 of the information of the current association about equipment. Such as, associated element form 1100 can include one or more information element 1101, includes but not limited to Element ED field 1102, length field 1104, (it can be with previously discussed BSSID for BSSID field 1106 Field is same or similar), STA address field 1108, security type field 1110, working channel field 1112, bandwidth of operation field 1114, the PHY speed field 1116 to AP, the speed of the PHY from AP One in rate field 1118 and ssid field 1120 or more person.

In one aspect, find about device type or the information element 1101 of service discovery (includes supply The special element of business) it is added to find frame.TDLS finds request/response frames 160 and 162 (Fig. 6 and 7) The some or all of information elements being typically included in the probe request/response frame as transmitted can be included by STA 1101.STA only just transmits probing response frame as P2P equipment when they work.

In one aspect, TDLS finds that claim frame 160 (Fig. 6) is sent to broadcast address, in order to net Any equipment in network layers 2 territory can receive it.The identical equipment in Internet 2 territory can be and this AP The equipment being associated but it also may be the equipment connected by the wireline interface of this AP and with another AP phase The wireless device of association.

On the other hand, receive TDLS find claim frame 160 (Fig. 6) and there is the STA of TDLS ability TDLS can be used to find, and response frame 162 (Fig. 7) responds.When TDLS finds claim frame 160 middle finger The BSSID 172 that shows (or, from another of one of other element that may be included in the request of discovery 160 BSSID value) do not mate TDLS find response frame 162 oneself BSSID 174 (or, from discovery Another BSSID value of one of other element that response 160 or responder STA is associated) time, can not Transmit TDLS and find response frame 162.802.11z agreement is associated not in from different BSSID at present STA between set up TDLS direct link 109 (Fig. 1).Therefore, referring back to Fig. 6, TDLS Discovery request 160 may be included in the instruction 184 that whether should send response in the case of not mating BSSID.

On the other hand, the channel 1012 of current association is included in TDLS and finds request/response 160 or 162 In.When channel is identical, this indicates these STA even when BSSID (such as 172 and 174) is different Also TDLS direct link 109 (Fig. 1) can be set up.On the other hand, send out immediately after being associated with AP TDLS is sent to find claim frame.TDLS find claim frame can send with regular intervals, the most per minute once. TDLS finds that claim frame may be sent to that unicast address.TDLS finds that claim frame may be sent to that clean culture ground Location (A1=BSSID, A2=STA address, A3=unicast address).TDLS finds that claim frame is passed The unicast address delivered to can have been transferred to this address or the MAC service data received from this address Obtain after unit (MSDU).

On the other hand, TDLS ability instruction 118 or 119 (Fig. 1) find to ask by receiving TDLS Frame 160 or response frame 162 is asked to carry out implicit representation.But, it is similar to the above disclosure about Fig. 2 and 3, Specific T DLS capabilities element (such as capabilities element 134 or 136) can be included in TDLS find request/ In response 112/116 (including that encapsulated TDLS finds request/response 160/162).Such as, TDLS Ability can carry out signaling transmission as a part for the extended capability element that TDLS discovery request/response includes.

On the other hand, the information element comprised during TDLS sets up request/response frames is also contained in TDLS Find in request/response frames.For the purpose found, in one example, TDLS sets up rules modification such as Under: TDLS sets up claim frame and is sent to broadcast address, and this indicates that this frame is for finding that frame is (such as, by TDLS Set up claim frame and be sent to group address to indicate that this sets up claim frame to be to find frame).Build when receiving broadcast TDLS During vertical claim frame, support that the equipment of TDLS uses clean culture TDLS to set up response frame and responds.On the one hand, Broadcast TDLS is set up the TDLS that claim frame responds set up response frame in response to receive, can not Transmit TDLS and set up acknowledgement frame.Set up request and the available session tokens of corresponding response (such as in order to mark Know about same dialog or the token of message exchange) mate.TDLS is set up frame and is reused in discovery elimination The needs of new frame are defined in 802.11z agreement.

When TDLS set up claim frame find for TDLS time, the beginning of direct link can by send TDLS sets up acknowledgement frame and initiates that (in this case, acknowledgement frame is start needed for direct link unique Frame).The transmittable TDLS of arbitrary STA (or requesting party or responder) sets up acknowledgement frame to activate TDLS Direct link.But, need not be between two STA with TDLS ability after TDLS finds Transmit TDLS and set up acknowledgement frame, because these TDLS STA may never any data of actual exchange.? One aspect, all broadcast TDLS received set up request and the TDLS being associated sets up the state responded It is stored at STA.

Correspondingly, when TDLS set up request and TDLS set up response frame be used for find time, it may be necessary to Send another TDLS to set up claim frame and (corresponding TDLS may be also had to set up response frame and TDLS set up Acknowledgement frame) set up direct link with actual.Which reduce needs tracking once to receive as TDLS discovery from it The TDLS of a part for exchange sets up the burden of the ability of all STA of request/response frames.

Further, on the one hand, potential TDLS peer STA can be found by sending broadcast discovery request, Wherein find that solicited message is encapsulated in layer 2 (L2) encapsulation.It addition, such as, in one aspect, find Response is sent to the unicast address of requesting party STA, wherein finds that information is also encapsulated in L2 encapsulation.

Figure 15 explains orally TDLS and finds the example flow diagram of exchange 400.In this example, TDLS finds Exchange 400 is that TDLS based on new definition finds and response frame 160 and 162 (Fig. 6 and 7).401, Broadcast TDLS discovery claim frame 408 is sent to AP 102, including address information A1=by STA1 104 BSSID, A2=STA1 and A3=broadcast.403 and 405, TDLS is found claim frame by AP 102 410 are forwarded to broadcast address, such as, and A1=broadcast, A2=BSSID, A3=STA1.STA2 106 Receive broadcast TDLS from AP 102 and find claim frame 410.STA2 106 have TDLS ability and 407 use TDLS to find, and response frame 412 responds, and it has address information A1=BSSID, A2= STA2, A3=STA1.In other words, STA2 106 includes at least its current BSSID at response frame 412, Currently may associate also on it or out of Memory (such as device type or the device type unit of its ability Element).409, response frame 414 is forwarded to STA1 104 by AP 102, and response frame 414 has address Information A1=STA1, A2=BSSID, A3=STA2.Response frame 414 is received by STA1, STA1 Subsequently STA2 106 is added to the peer STA list with TDLS ability.TDLS finds response 414 Payload inside the BSSID that is associated with of BSSID with STA1 104 that include identical.

Figure 16 explanation is followed by based on the broadcast TDLS request of setting up and starts from clean culture TDLS foundation request The TDLS that TDLS sets up finds the example flow diagram of message stream 1200.1201, STA1 104 will be wide Broadcast TDLS to set up claim frame 1208 and be sent to AP 102, including address information A1=BSSID, A2= STA1 and A3=broadcasts.1203 and 1205, TDLS is set up claim frame 1210 and forwards by AP 102 To broadcast address, such as, A1=broadcast, A2=BSSID, A3=STA1.STA2 106 is from AP 102 Receive broadcast TDLS and set up claim frame 1210.STA2 106 has TDLS ability and uses 1207 TDLS sets up response frame 1212 and responds, and it has address information A1=BSSID, A2=STA2, A3=STA1.1209, AP 102 is forwarded to STA1 104, response frame 1214 by setting up response frame 1214 There is address information A1=STA1, A2=BSSID, A3=STA2.Set up response frame 1214 by STA1 Receive.

1211, STA1 104 based on the TDLS response frame 1214 received 1209 by clean culture TDLS Set up claim frame 1216 and be sent to AP 102, including address information A1=BSSID, A2=STA1 and A3=STA2.1213, TDLS is set up claim frame 1218 and is forwarded to unicast address, example by AP 102 As, A1=STA2, A2=BSSID, A3=STA1.STA2 106 receives clean culture TDLS from AP 102 Set up claim frame 1218.1215, STA2 106 uses TDLS to set up response frame 1220 and responds, It has address information A1=BSSID, A2=STA2, A3=STA1.1217, AP 102 will build Vertical response frame 1222 is forwarded to STA1 104, sets up response frame 1222 and has address information A1=STA1, A2=BSSID, A3=STA2.Set up response frame 1222 to be received by STA1, and 1219, STA1 Transmit TDLS set up acknowledgement frame 1224, its have unicast address A1=BSSID, A2=STA1, A3=STA2.1221, AP 102 will have address A1=STA2, A2=BSSID, A3=STA1 Response frame 1224 of setting up be forwarded to STA2 for setting up TDLS link.

In one aspect, the TDLS received from broadcast or multicast address sets up claim frame and may be interpreted as TDLS Find a part for exchange, it means that the information element comprised inside it need be not necessarily stored in recipient, except Temporarily storage sets up response frame to generate corresponding TDLS.On the other hand, in order to indicate TDLS further Setting up claim frame is to find a part for exchange rather than set up a part for exchange, and TDLS finds that element can It is included in TDLS to set up in claim frame, or predefined session tokens value can set up claim frame at TDLS Middle use.

On the other hand, TDLS find frame can include the main of instruction equipment and/or one of secondary objective or More device type elements.The example of device type includes, but not limited to computer, input equipment (example As, mouse, keyboard etc.), display, photographing unit, smart phone etc..TDLS find response can only when It is present in ability when the device type at the requested device type and recipient STA found in asking matches Transmit.

In one example, which information element is included in TDLS and sets up claim frame and TDLS foundation sound Answering in frame can be to find for TDLS or set up for TDLS link to determine by them.At one Aspect, finds for TDLS, probe request can be encapsulated in TDLS EtherType, and be sent to Broadcast address or unicast address.In addition to routine information element, probe requests thereby can comprise points out sender The MAC Address of STA and the link identifier of BSSID.May also include other relevant parameter, such as associate Channel, from the security type etc. on the link of the current PHY speed of AP and AP.The spy received Survey whether response will have TDLS ability by extended capability element instruction STA, or TDLS ability can Release, because STA once can resolve encapsulated probe requests thereby and use encapsulated probe response to ring Should.Probe response can comprise link identifier element, and link identifier element contains TDLS initiator STA Address, BSSID and the TDLS responder STA address of TDLS responder STA.In one example, Probe response is encapsulated in TDLS frame.It will be appreciated by those skilled in the art that association listed herein Parameter not exclusively and can include that other parameter the most do not mentioned does not affects the model of the disclosure Enclose or spirit.

Figure 17 is to include the table 1300 of the example of the possible frame 1302 of use in TDLS discovery, such as, TDLS finds request 1304 or TDLS discovery response 1306.In one example, all frames use TDLS Encapsulation, or based on private sub-networks access protocol tissue unique identification (SNAP OUI), there is SNAP Other L2 any of any encapsulated layer on the proprietary EtherType of OUI 000000h or EtherType Encapsulation.SNAP is to point out 802.11 agreements of more multi-protocols for expansion service access point field.One Individual aspect, discovery request is sent to broadcast address (such as, unicasting to AP, then broadcasted by AP), And find that response is sent to transfer the unicast source address of the STA of this discovery request.In one example, Defining two new TDLS frames, such as, encapsulated TDLS finds request and response frame 160 and 162 (Fig. 6 and 7).

As previously discussed, these frames all can comprise the information word that mark transmits STA and BSSID of frame Element.May also comprise other elements.In one example, after being associated with AP, TDLS is found that request passes Deliver to broadcast address.The TDLS received finds that response is then stored in the equity with TDLS ability In the list of STA.Find that from TDLS the information of request may be alternatively stored in this list.Show at one In example, when exchanging traffic with the STA in this list, or when setting up with one of STA in this list When WiFi shows (WFD) link, set up TDLS direct link.

Such as set up claim frame by transmission broadcast TDLS, receive one or more TDLS foundation response Frame and use TDLS set up acknowledgement frame and ring the STA that should set up TDLS direct link with it Should, the TDLS direct link with multiple STA can be set up in setting up at one.This can include sending TDLS Set up all STA of response.Groups of TDLS direct link is set up and can be found and TDLS chain by TDLS Road is set up combined.

The information of the current distance between not produced about potential peer STA by the TDLS discovery of AP, This needs directly to carry out between STA Frame switch.In direct Frame switch, because other STA may be Battery saving mode and not reviving, so cannot know when that other STA is in " reviving " state.Therefore, for Avoiding this problem, TDLS finds that claim frame may indicate that TDLS finds that response frame can be directly transferred to Requesting party STA.

Figure 18 explanation illustrates that broadcast finds request and directly finds the example flow diagram 1400 of response.1401, Broadcast TDLS discovery claim frame 1408 is sent to AP 102, including address information A1=by STA1 104 BSSID, A2=STA1 and A3=broadcast.

Requesting party STA (such as STA1) is maintained at active mode after the request is sent and reaches some times.Soviet Union The duration of the time of waking up can indicate, referring for example to timing synchronization function (TSF) inside claim frame.At one Aspect, TSF is the timing synchronization message receive-transmit system of the STA exchange beacon frame of the most each participation.Also May indicate that the time started of recovery time.The STA being associated with identical AP share identical timing reference or TSF.When indicated recovery time expires, responder STA can be sent by AP and find response, or It can not send response.When response is sent by AP, the STA sending response can include that it is assorted The instruction of response can not be directly transmitted.In this case requesting party STA can with clean culture find request with Enter.

1403 and 1405, TDLS is found that claim frame 1410 is forwarded to broadcast address, example by AP 102 As, A1=broadcast, A2=BSSID, A3=STA1.STA2 106 receives broadcast TDLS from AP 102 Find claim frame 1410.STA2 106 has TDLS ability.

1407, STA2 utilizes the directly transmission of TDLS discovery response frame 1412 to respond STA1, TDLS finds that response frame 1412 has address information A1=BSSID, A2=STA2, A3=STA1, and Optionally there is direct transmission indicator information element 1414 (such as common action type).Response frame 1412 Being received by STA1, STA2 106 is added to the peer STA row with TDLS ability by STA1 subsequently Table.

In one example, only when requesting party STA is associated with identical BSSID or when it is associated in Just send directly in response to 1412 time on same channel.Otherwise, response can be sent by AP.An example In, due to requesting party STA be not likely to be directly up to, so directly in response to only retrying limited number of times. Directly in response to including channel detection information and/or transmission power information.Such as point out directly in response to may also include The out of Memory element of the ability at responder STA.

In one example, TDLS finds that claim frame 1412 includes that instruction must be by AP or by directly The direct transmission indicator information element 1414 of response frame is transmitted in path.In one aspect, in directapath The TDLS of upper transmission finds that response frame 1412 is the management frame of subtype common action.When not association or When direct link is present between the sender of frame and recipient, common action frame is (such as IEEE P802.11 rev Defined in mb) also received by STA.Therefore, refer to as " public ".Scanning side STA is transmittable many Individual broadcast TDLS finds that claim frame (such as 1408) skips delivery traffic indication map (DTIM) to increase The STA of beacon can receive their probability.Some STA skip DTIM beacon to increase the length of one's sleep also Reduce stand-by power consumption.

In one example, STA after association or transmits broadcast TDLS discovery after refresh option Claim frame 1408, with provide have been chosen by this STA near the recent list of equipment.When response quilt When directly transmitting, the TDLS that receives find response frame 1412 indicate which STA by AP up to, or Which STA is the most nearby.

Figure 19 explanation includes to the clean culture of one or more target STA selected finding request and directly ringing The example of the message exchange 1500 answered.In one example, from finding to ask based on the broadcast previously transmitted The list obtained after receiving discovery response by AP is asked to select target STA.1501, STA1 104 will Clean culture TDLS finds that claim frame 1508 is sent to AP 102, including address information A1=BSSID, A2 =STA1 and A3=STA2, is thereby directed to STA2 by unicast messages.1503, AP 102 is by TDLS Find that claim frame 1510 is forwarded to this unicast address, such as, A1=STA2, A2=BSSID, A3= STA1, thereby by this message unicast to STA2.STA2 106 receives clean culture TDLS from AP 102 and finds Claim frame 1510.STA2 106 has TDLS ability, such as, as above based on being first found sound Should be described.Correspondingly, 1505, STA2 utilizes TDLS to find the direct transmission of response frame 1512 Come to STA1 respond, TDLS find response frame 1512 have address information A1=STA1, A2=STA2, A3=BSSID, and optionally there is direct transmission indicator information element 1414, the most as discussed above Common action type.Response frame 1512 is received by STA1.

Figure 20 explanation include utilizing the TDLS broadcast by the response of AP find with utilize directly in response to The exemplary message flow 1600 of the combination that clean culture finds.This TDLS finds that code can be based on existing detection Request and probe request, such as, as follows.1601, TDLS finds claim frame 1608 envelope Dress probe requests thereby frame, this discovery claim frame 1608 is sent to broadcast address via AP 102.1603 With 1605, AP 102 forwards TDLS discovery claim frame 1610, and (such as, it based on 1608 but has correction Address).1607 and 1609, TDLS finds that response frame 1612 is common detection response frame, does not has Additional encapsulation.The TDLS with probe requests thereby frame finds claim frame 1608 and has probing response frame TDLS find that response frame 1612 can comprise and point out to send this TDLS and find the STA of claim frame The BSSID element of BSSID and address, and optional instruction STA is currently associated with AP thereon The channel element of channel.TDLS ability is by the extension comprised in probe requests thereby and probe response frame Capabilities element arranges suitable capability bit and carrys out signaling transmission.Probe response can be at A3 field or STA2 Address includes BSSID.

1611, clean culture TDLS discovery claim frame 1616 is sent to AP 102 by STA1 104, including Address information A1=BSSID, A2=STA1 and A3=STA2, be thereby directed to STA2 by unicast messages. 1613, AP 102 utilizes new addressing to forward TDLS to find claim frame 1618, such as, unicast address, A1=STA2, A2=BSSID, A3=STA1, thereby by this message unicast to STA2.STA2 106 Receive clean culture TDLS from AP 102 and find claim frame 1618.STA2 106 has TDLS ability, Such as, above based on being first found as described in response.Correspondingly, 1615, STA2 uses TDLS Finding that STA1 is responded by the directly transmission of response frame 1620, TDLS finds that response frame 1620 has Address information A1=STA1, A2=STA2, A3=BSSID.Response frame 1620 is received by STA1.

With reference to Figure 21 and 22, explain orally respectively and find rule for TDLS based on probe requests thereby and probe response The exemplary message flow 1700 and 1800 of journey.Example probe request frame is at IEEE 802.11-2007 the 7.2.3.8 article, in and defined in WiFi_P2P_ technology _ specification _ v1.00.pdf the 4.2.2 article.Exemplary spy Survey request frame in IEEE 802.11-2007 the 7.2.3.9 article and in WiFi_P2P_ technology _ specification Defined in _ v1.00.pdf the 4.2.3 article.

In figure 21,1701, TDLS finds that claim frame 1708 encapsulates probe requests thereby frame, for This discovery claim frame 1708 of STA1 is sent to broadcast address via AP 102.1703 and 1705, AP 102 By such as based on 1708 but there is address information A1=STA1 of correction, A2=STA2, A3=BSSID TDLS finds that claim frame 1710 is forwarded to STA1.1707, STA2 is not such as including AP 102 Wireless communication link on directly transmit TDLS to STA1 and find response frame 1712, such as there is address letter The probe requests thereby frame of breath A1=STA1, A2=STA2, A3=BSSID.

In fig. 22,1801, TDLS finds that claim frame 1808 encapsulates probe requests thereby frame, this discovery Claim frame 1808 is sent to broadcast address via AP 102.1803 and 1805, AP 102 forwards such as Based on 1808 but have the address of correction TDLS find claim frame 1810.1807, STA2 will have Have address information A1=STA1, the probe response 1812 of A2=STA2, A3=STA2 is transferred directly to STA1。

With reference to Figure 23, message flow chart 1900 explains orally a kind of AP by delivering traffic indication map (DTIM) Carry out returning by the probe requests thereby received after target beacon transmission times (TBTT) and be easy to P2P and find Method.The content of probe request can be replicated without modification, including address field.When closing with AP When one or more STA of connection is in battery saving mode, after DTIM beacon, transmit broadcast traffic, This allows the STA with P2P ability to enter battery saving mode, and they holdings can the side's of being scanned P2P equipment simultaneously Find.1901 and 1903, STA1 transmits has the broadcast of address information A1=, A2=STA1, A3= The probe request 1908 of wildcard BSSID.As used in this article, " wildcard BSSID " refer to for Represent the general BSSID of all BSSID.In other words, wildcard BSSID similar broadcast ground in a way Location.Such as, any equipment receiving the probe requests thereby with wildcard BSSID will send probe response, because of It is matched with the BSSID being associated with this equipment for the wildcard BSSID in probe requests thereby.

Sending after probe request 1908, scanning side's P2P equipment (such as STA1 102) should be Keep on channel intercepting until at least some time of the DTIM TBTT 1914 of AP on channel, or Reach a period of time of time between typically DTIM beacon.1903 and 1905, AP 102 is at this After the period after the DTIM TBTT 1914 of AP, probe request 1908 is passed back to all STA (examples Such as STA1 and STA2).(especially those have the relevant letter of P2P to the probe requests thereby 1908 that forwarding receives Breath element probe requests thereby) AP thereby allow there is the equipment (such as STA1) of P2P ability once Being put into battery saving mode in association, they holdings of probe requests thereby being simultaneously based on passback can be by other P2P equipment Find.The STA being associated should be indicated this by the AP forwarding (P2P) probe requests thereby 1908 received Battery saving mode relevant information or back information (such as by arranging capability bit).Further, 1909, STA2 can by have address information A1=STA1, A2=STA2, A3=STA2 probe response 1912 straight Connect and be sent to STA1 to initiate the foundation of communication.

With reference to Figure 24, based on described above, on the one hand, a kind of for performing equity in a communication network The method 2400 that equipment finds includes that generation is configured to mark and has tunnelling direct link foundation (TDLS) energy Discovery request (block 2402) of the peer device of power.Further, method 2400 includes transmitting the request of discovery (block 2404).It addition, method 2400 comprises determining whether to receive discovery response (block in response to discovery request 2406)。

In the one side of method 2400, generate the request of finding (block 2402) and can farther include to ask discovery Ask encapsulation in a data frame (block 2403).Such as, encapsulation makes to find that request is transparent for access point. Correspondingly, transmit (block 2404) can farther include to be sent to access point (block 2405).Such as, connect Then access point can will find on other station that request is forwarded to be associated with this access point, and wherein encapsulation allows to connect Access point even forwards this discovery to ask in the case of access point is not configured to understand the request of discovery.

In the another aspect of method 2400, generate the request of finding (block 2402) and can farther include TDLS Ability information is attached to probe requests thereby or is attached to beacon (block 2407).Such as, probe requests thereby or beacon can Find based on P2P.Correspondingly, transmit (block 2404) transmission can be farther included include TDLS ability The probe requests thereby of information or beacon (block 2409).Also, it is determined whether receive discovery response (block 2406) May also include discovery response (block 2411) receiving the TDLS ability information including being attached to probe response.

With reference to Figure 25, on the one hand, the station STA that explained orally (STA 102,104 of such as Fig. 1 and/ Or 106) in any station all 2000 can be represented by station.Stand 2000 include for perform with described herein Assembly and function in the processor 2001 of one or more process function being associated.Processor 2001 Single or multiple processor group or polycaryon processor can be included.Moreover, processor 2001 can be by reality It is now Integrated Processing System and/or distributed processing system(DPS).

Stand and 2000 farther include memorizer 2002, the basis such as performed by processor 2001 for storage The application of ground version.Memorizer 2002 can include any kind of memorizer that can be used by computer, Such as random access memory (RAM), read only memory (ROM), band, disk, CD, easily The property lost memorizer, nonvolatile memory and their any combination.

Further, standing 2000 includes communications component 2003, its be used for utilizing hardware as described in this article, Software and services is set up and safeguards and a side or communicating more in many ways.Communications component 2003 can carry station The communication between all assemblies on 2000, and station 2000 with such as across communication network location equipment and/ Or in series or be connected to partly to stand 2000 equipment etc external equipment between communication.Such as, Communications component 2000 can include one or more bar bus, and may also include respectively with can be used for setting with outside The transmitting chain component that standby mutual transmitter and receiver is associated and reception chain component.

It addition, station 2000 may also include data storage 2004, it can be any suitable hardware and/or soft Part combination and provide combining information, data base and the program that aspects described herein is used Massive store.Such as, data storage 2004 can be current not by answering that processor 2001 performs Data repository.

Standing and 2000 can comprise additionally in user's interface unit 2005, it can be used for receiving the use from station 2000 Family input and also can be used for generating the output presenting to user.User's interface unit 2005 can include one Individual or more input equipments, include, but are not limited to, keyboard, numeric keypad, mouse, touch-sensitive display, Navigation key, function key, microphone, speech recognition component, it is able to receive that any other of the input from user Mechanism or their any combination.It addition, user's interface unit 2005 can include one or more Outut device, includes, but are not limited to, display, speaker, haptic feedback mechanism, printer, can Output is presented to any other mechanism or their any combination of user.

It addition, in some respects, standing 2000 can include being configured to find and initiate or set up and another equity The Peer discovery component 108 of the TDLS communication of equipment (such as another station).Peer discovery component 108 Including all of function described above or some parts, that such as describe about Fig. 1 and close in this article Including other various aspects of being stated of various message flow chart.Such as, Fig. 4,12 and 14-19 explain orally Request is found and for determining that this type of finds the various realizations of response for generating this type of.

With reference to Figure 26, based on described above, it be used for performing tunnelling direct link in cordless communication network and set up (TDLS) device 2600 found can reside at least partially within such as access point and/or client or movement In the station of node etc.Such as, device 2600 can include, or the station of Fig. 1 102,104 and 106 A part.It is to be appreciated that device 2600 is shown as including functional device, they can be represent by processor, The functional device of the function that software or a combination thereof (such as, firmware) are realized.Device 2600 includes tying The logic groups 2602 of the electric assembly worked with closing.Such as, logic groups 2602 can include for generating It is configured to mark and there is the dress finding request that tunnelling direct link sets up the peer device of (TDLS) ability Put 2604.For example, referring to Fig. 1, can include that peer finds for generating the device 2604 of the request of discovery Assembly 108 and/or discovery request generator 110.Alternatively, or additionally, with reference to Figure 25, it is used for generating Find that the device 2604 of request can include processor 2001.Further, logic groups 2602 can include for Transmit the device 2606 of the request of discovery.For example, referring to Fig. 1, for transmitting the device 2606 of the request of discovery Peer discovery component 108 can be included and/or find request generator 110.Alternatively, or additionally, ginseng According to Figure 25, processor 2001 and/or communications component can be included for transmitting the device 2606 of the request of discovery 2003, or one part, such as transmitter.It addition, logic groups 2602 can include means for determining whether The device 2608 finding response is received in response to the request that finds.For example, referring to Fig. 1, it is used for determining receiving and sends out The device 2608 now responded can include Peer discovery component 108 and/or find in response to determining that device 114.Replace Dai Di, or additionally, with reference to Figure 25, find that the device 2608 of response can include processing for determining to receive Device 2001 and/or communications component 2003, or one part, such as receiver.

In the one side of device 2600, for generate the device 2604 of the request of discovery can farther include for By the request encapsulation of discovery device 2605 in a data frame.Such as, encapsulation makes to find that request is for access point It is transparent.For example, referring to Fig. 1, for the device 2605 that the request of discovery encapsulates in a data frame can be wrapped Include Peer discovery component 108 and/or find request generator 110.Alternatively, or additionally, with reference to figure 25, for the device 2605 that the request of discovery encapsulates in a data frame can be included processor 2001.Correspondingly, Device 2606 for transmitting can farther include the device 2607 for being sent to access point.Such as, connect Then access point can will find on other station that request is forwarded to be associated with this access point, and wherein encapsulation allows to connect Access point even forwards this discovery to ask in the case of access point is not configured to understand the request of discovery.

In the another aspect of device 2600, can farther include to use for generating the device 2604 of the request of discovery In TDLS ability information being attached to probe requests thereby or being attached to the device 2609 of beacon.Such as, detection please Ask or beacon can find based on P2P.For example, referring to Fig. 1, for TDLS ability information being attached to spy Survey request or be attached to the device 2609 of beacon and can include Peer discovery component 108 and/or find to seek survival Grow up to be a useful person 110.Alternatively, or additionally, with reference to Figure 25, for TDLS ability information being attached to detection Request or be attached to the device 2609 of beacon and can include processor 2001.Correspondingly, for the device transmitted 2606 can farther include to include the probe requests thereby of TDLS ability information or the device of beacon for transmission 2611.Find the device 2608 of response to may also include for receiving to include it addition, be used to determine whether to receive It is attached to the device 2613 finding response of the TDLS ability information of probe response.

On the one hand, device 2600 can include performing arrangement described above at least one processor or One or more module of processor.

It addition, device 2600 can include preserving for performing and electricity assembly 2604,2606, and optional 2608, and the memorizer 2616 of the instruction of 2605,2607,2609,2611 and 2613 functions being associated. Although illustrated as being placed on memorizer 2616, but it is to be understood that electricity assembly 2604,2606, Yi Jiren The 2608 of choosing, and one or more in 2605,2607,2609,2611 and 2613 may be present in Within memorizer 2616.Such as, on the one hand, memorizer 2616 can include the memorizer 2002 of Figure 25 And/or data storage 2004.

As used in this application, term " assembly ", " module ", " system " and similar terms Be intended to include computer related entity, such as but be not limited to hardware, firmware, the combination of hardware and software, Software or executory software.Process that such as, assembly can be but not limited to run on a processor, Processor, object, can executive item, the thread of execution, program and/or computer.As explanation, at meter The application and this calculating equipment that run on calculation equipment can be all assemblies.One or more assembly can be stayed Stay in the thread of process and/or execution, and assembly can localize on one computer and/or be distributed in Between two or more multiple stage computer.Additionally, these assemblies can store each of various data structure from it Plant computer-readable medium to perform.These assemblies can communicate by means of locally and/or remotely process, such as Signal according to having one or more packet communicates, and such packet is all in this way from borrowing Help this signal interact and/or across such as because of spy with another assembly in local system, distributed system The data of the assembly that the network of net etc interacts with other system.

It addition, describe various aspects herein in conjunction with terminal, terminal can be catv terminal or wireless terminal. Terminal be also referred to as system, equipment, subscri er unit, subscriber station, movement station, mobile station, mobile device, Distant station, remote terminal, access terminal, user terminal, terminal, communication equipment, user agent, user Equipment or subscriber's installation (UE).Wireless terminal can be cell phone, satellite phone, wireless phone, Session initiation Protocol (SIP) phone, WLL (WLL) are stood, personal digital assistant (PDA), There is the portable equipment of wireless connection capability, calculating equipment or be connected to other of radio modem Processing equipment.Moreover, the various aspects relevant with base station described herein.Base station can be used for wireless Terminal communicates, and also referred to as access point, B node or other certain term.

Moreover, term "or" is intended to indicate that same "or" rather than different "or".That is, unless additionally referred to Bright or can be clear that from context, otherwise be intended to indicate that naturally can the row of holding concurrently for phrase " X uses A or B " Any arrangement in row.That is, phrase " X uses A or B " obtains meeting of any example in following instance: X uses A；X uses B；Or X uses A and B.It addition, the application and claims Article " one " used in book and " certain " are typically to be understood as representing " one or more ", remove Non-other statement or can be apparent from from the context referring to singulative.

Technology described herein can be used for various wireless communication system, such as CDMA, TDMA, FDMA, OFDMA, SC-FDMA and other system.Term " system " and " network " are often by can be mutual Use with changing.Cdma system can realize such as universal terrestrial radio and be electrically accessed (UTRA), cdma2000 Etc. radiotechnics.It addition, cdma2000 contains IS-2000, IS-95 and IS-856 standard.TDMA System can realize the radiotechnics such as such as global system for mobile communications (GSM).OFDMA system is permissible Realize such as evolution UTRA (E-UTRA), Ultra-Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), the radiotechnics of IEEE 802.20, Flash-OFDM etc..UTRA It is a part of Universal Mobile Telecommunications System (UMTS) with E-UTRA.3GPP Long Term Evolution (LTE) The UMTS version using E-UTRA, its use OFDMA on the uplink and in up-link Upper employing SC-FDMA.UTRA, E-UTRA, UMTS, LTE and GSM are from the entitled " the 3rd For partnership projects (3GPP) " tissue document described in.It addition, cdma2000 and UMB from Described in the document of the tissue of entitled " third generation partnership projects 2 " (3GPP2).Additionally, these channel radios Communication system may also include be frequently used non-matching without licensed spectrum, 802.xx WLAN, bluetooth and appoint What equity (such as, moving the movement) self-organizing (ad hoc) of his short distance or long-range wireless communication technology Network system.

Each side or feature by by can include several equipment, assembly, module, and the like system in the way of Present.Will understand and appreciate that, equipment that various systems can include adding, assembly, module etc., and/or can With and not exclusively include combining equipment that these accompanying drawings are discussed, assembly, module etc..Can also be used these The combination of way.

Various illustrative logical, logical block, module and the circuit described in conjunction with presently disclosed embodiment Can use general processor, digital signal processor (DSP), special IC (ASIC), scene can Programming gate array (FPGA) or other PLD, discrete door or transistor logic, discrete Nextport hardware component NextPort or its any combination being designed to carry out function described herein realize or perform.General Processor can be microprocessor, but in alternative, processor can be any routine processor, Controller, microcontroller or state machine.Processor is also implemented as the combination of calculating equipment, such as DSP cooperate with DSP core with the combination of microprocessor, multi-microprocessor one or more is micro- Processor or any other this type of configuration.Additionally, at least one processor can include can be used to perform One or more step in process described above and/or action and/or one or more mould of action Block.

Additionally, combine method or the step of algorithm that aspect disclosed herein describes and/or action can be straight Connect within hardware, in the software module performed by processor or in combination of the two implement.Software Module can reside in RAM memory, flash memory, ROM memory, eprom memory, EEPROM Memorizer, depositor, hard disk, removable dish, any other shape of CD-ROM or known in the art In the storage medium of formula.Exemplary storage medium can be coupled to processor so that this processor can be deposited from/to this Storage media is read and write information.In alternative, storage medium can be integrated into processor.It addition, Some aspects, processor and storage medium can reside in ASIC.It addition, ASIC can reside in user In terminal.In alternative, processor and storage medium can be resident in the user terminal as discrete assembly. It addition, in some respects, method or the step of algorithm and/or action can as one of code and/or instruction or Its any combination or set reside in the machine readable media can being included in computer program and/or On computer-readable medium.

In one or more aspect, described function can be hardware, software, firmware or its any group Conjunction realizes.If realized in software, the most each function can be deposited as the instruction of one or more bars or code Storage on a computer-readable medium or mat its transmit.Computer-readable medium includes computer-readable storage medium With communication media, it includes any medium facilitating computer program to shift to another ground from a ground.Deposit Storage media can be any usable medium that can be accessed by a computer.Unrestricted as example, these calculate Machine computer-readable recording medium can include RAM, ROM, EEPROM, CD-ROM or other optical disc storage, disk Storage or other magnetic storage apparatus, maybe can be used to storage instruction or data structure form desired program generation and Other medium any that can be accessed by a computer.As used herein plate and dish include compact disc (CD), Laser dish, laser disc, digital versatile dish (DVD), floppy disk and blu-ray disc, its mid-game (disk) often with The mode of magnetic reproduces data, and dish (disc) often reproduces data optically with laser.Above-mentioned group Close and also should be included within the scope of computer readable media.

Although foregoing disclosure discusses illustrative aspect and/or embodiment, but it should be appreciated that wherein Can make various change and change without departing from these described aspects and/or embodiment as by appended The scope of claim definition.Although additionally, the key element of described aspect and/or embodiment is probably with list Number is described or claimed in right, but plural number contemplates the most, is defined in unless explicitly stated Odd number.It addition, any aspect and/or embodiment completely or partially can be with any other aspect and/or enforcement All or part of combination of example, unless stated otherwise.

Claims (40)

1. the method that in communication network, peer finds, including:

Generation is configured to mark and has the discovery that tunnelling direct link sets up the peer device of (TDLS) ability Request, wherein said discovery asks to include the TDLS ability instruction corresponding with request station；

Transmit described discovery to ask；And

Determining whether to receive discovery response in response to described discovery request, wherein said discovery response includes and rings The TDLS ability instruction that should stand corresponding.

2. the method for claim 1, it is characterised in that generate described discovery request and farther include Find that request encapsulates in a data frame so that described discovery asks for access point to be transparent by described, and its Described in transmit farther include to be sent to described access point.

3. the method for claim 1, it is characterised in that generate described discovery request and include TDLS Ability information is attached to probe requests thereby, and wherein transmits described discovery request and include that transmission includes described TDLS The described probe requests thereby of ability information.

4. the method for claim 1, it is characterised in that generate described discovery request and include TDLS Ability information is attached to beacon, and wherein transmits described discovery request and include that transmission includes described TDLS ability The described beacon of information.

5. the method for claim 1, it is characterised in that farther include to receive described discovery and respond, Wherein said discovery response includes being attached to the TDLS ability information of probe response.

6. the method for claim 1, it is characterised in that farther include to receive the from another equipment Two find request；Generate the second discovery response, be attached to described second including by the 2nd TDLS ability information Find response；And transmit the described second discovery response including described 2nd TDLS ability information.

7. the method for claim 1, it is characterised in that farther include directly to connect from peer device Receive described discovery to respond.

8. method as claimed in claim 7, it is characterised in that receive described discovery response and farther include Receive probing response frame.

9. the method for claim 1, it is characterised in that generate described discovery request and include tunneling through (TDLS) ability of setting up direct link incidentally arrives and utilizes peer device to find the detection frame that agreement is transmitted On.

10. method as claimed in claim 9, it is characterised in that described detection frame is probe request.

11. methods as claimed in claim 9, it is characterised in that farther include to add associated element To described detection frame, wherein said associated element includes performing the described described request station generating the request of discovery The information of current association.

12. the method for claim 1, it is characterised in that farther include to be formed and by described The direct link at the station (STA) being found of existing response identification.

13. the method for claim 1, it is characterised in that farther include to add associated element Finding request to described, wherein said associated element includes performing the described described request station generating the request of discovery The information of current association.

14. the method for claim 1, it is characterised in that receive described discovery response and include receiving Associated element including the information of the current association generating the described described response station finding response.

15. methods as claimed in claim 14, it is characterised in that described associated element farther include with The next item down or multinomial: the security type of direct link, working channel, working channel bandwidth or to or from The current PHY speed of access point (AP).

16. the method for claim 1, it is characterised in that farther include by extended capability element, One of session tokens or device type element add described discovery to asks.

17. the method for claim 1, it is characterised in that generate described discovery and ask bag further Include generation broadcast address to utilize described broadcast address to ask to broadcast described discovery.

18. the method for claim 1, it is characterised in that generate described discovery and ask bag further Include generation unicast address information and be sent to unicast address for by described discovery request.

19. the method for claim 1, it is characterised in that generate described discovery and ask bag further Include: find that request includes mark and connecing that the described request station transmitting described discovery request is associated described The BSSID (BSSID) of the MAC Address of access point.

20. are configured to perform at least one processor that in communication network, peer device finds, described processor Including:

It is configured to mark for generating there is tunnelling direct link sets up the peer device of (TDLS) ability Find that the first hardware module of request, wherein said discovery request include the TDLS energy corresponding with request station Power indicates；

For transmitting described the second module finding request；And

It is used to determine whether to receive the three module finding response in response to described discovery request, wherein said Now response includes the TDLS ability instruction corresponding with response station.

21. 1 kinds of devices that peer device finds in communication network, including:

It is configured to mark for generating there is tunnelling direct link sets up the peer device of (TDLS) ability Find that the device of request, wherein said discovery request include the TDLS ability instruction corresponding with request station；

For transmitting the described device finding request；And

Being used to determine whether to find that request receives the device finding to respond in response to described, wherein said discovery rings The TDLS ability instruction corresponding with response station should be included.

22. 1 kinds of customer station equipments that peer device finds in communication network, including:

Find request generator, be configured to mark for generation and there is tunnelling direct link foundation (TDLS) The discovery request of the peer device of ability, the wherein said TDLS finding to ask to include and request station is corresponding Ability indicates；

Communications component, is used for transmitting described discovery and asks；And

Find, in response to determining that device, to be used to determine whether to receive discovery response, wherein in response to described discovery request Described discovery response includes the TDLS ability instruction corresponding with response station.

23. devices as claimed in claim 22, it is characterised in that described discovery request generator enters one Step is configured to find that request encapsulation is in a data frame so that described discovery request for access point is by described Bright, and wherein said communications component is further configured to described discovery request is sent to described access point.

24. devices as claimed in claim 22, it is characterised in that described discovery request generator enters one Step is configured through that TDLS ability information is attached to probe requests thereby asks to generate described discovery, and wherein Described communications component is further configured to transmit the described probe requests thereby including described TDLS ability information.

25. devices as claimed in claim 22, it is characterised in that described discovery request generator enters one Step is configured through that TDLS ability information is attached to beacon asks to generate described discovery, and wherein said Communications component is further configured to transmit the described beacon including described TDLS ability information.

26. devices as claimed in claim 22, it is characterised in that described communications component configures further Become to receive described discovery to respond, the wherein said TDLS ability letter finding that response includes being attached to probe response Breath.

27. devices as claimed in claim 22, it is characterised in that farther include:

Find response maker, be configured to generate the discovery that the second discovery response receives from another equipment with reply Request, wherein said discovery response maker is further configured to the 2nd TDLS ability information is attached to institute State the second discovery response；And

Wherein said communications component is further configured to transmit the institute including described 2nd TDLS ability information State the second discovery response.

28. devices as claimed in claim 22, it is characterised in that described discovery response is from equity Equipment directly receives.

29. devices as claimed in claim 28, it is characterised in that described discovery response bag further Include probing response frame.

30. devices as claimed in claim 22, it is characterised in that described discovery request generator is entered One step is configured through tunneling through direct link and sets up (TDLS) ability and incidentally arrive and utilize peer device to find Generate described discovery on the detection frame that agreement is transmitted to ask.

31. devices as claimed in claim 30, it is characterised in that described detection frame is probe requests thereby Frame.

32. devices as claimed in claim 30, it is characterised in that described discovery request generator is entered One step is configured to associated element is added to described detection frame, and wherein said associated element includes described subscriber station The information of the current association of device.

33. devices as claimed in claim 22, it is characterised in that described communications component is joined further It is set to set up and by the direct link at the station (STA) being found of described discovery response identification.

34. devices as claimed in claim 22, it is characterised in that described discovery request generator is entered One step is configured to that associated element is added to described discovery asks, and wherein said associated element includes described user The information of the current association of station arrangement.

35. devices as claimed in claim 22, it is characterised in that described discovery response includes association Element, described associated element includes the information generating the current association of the described described response station finding response.

36. devices as claimed in claim 35, it is characterised in that described associated element is wrapped further Include following one or more: the security type of direct link, working channel, working channel bandwidth or to or Current PHY speed from access point (AP).

37. devices as claimed in claim 22, it is characterised in that described discovery request generator is entered One step is configured to that one of extended capability element, session tokens or device type element add to described discovery please Ask.

38. devices as claimed in claim 22, it is characterised in that described discovery request bag further Include broadcast address to utilize described broadcast address to ask to broadcast described discovery.

39. devices as claimed in claim 22, it is characterised in that described discovery request bag further Include unicast address and be sent to described unicast address for by described discovery request.

40. devices as claimed in claim 22, it is characterised in that described discovery request generator is entered One step is configured to the basic service of the MAC Address of access point mark being associated with described customer station equipment Set identifier (BSSID) is included in described discovery in request.