CN106941732A

CN106941732A - Reconnection method, system and WFD equipment

Info

Publication number: CN106941732A
Application number: CN201610004338.3A
Authority: CN
Inventors: 田康
Original assignee: China Mobile Communications Group Co Ltd
Current assignee: China Mobile Communications Group Co Ltd
Priority date: 2016-01-04
Filing date: 2016-01-04
Publication date: 2017-07-11
Anticipated expiration: 2036-01-04
Also published as: CN106941732B

Abstract

The invention discloses a kind of reconnection method, including：When needing to reconnect, the first WFD equipment sends to the 2nd WFD equipment and reconnects mark and corresponding session identification；The mark that reconnects is used to indicate the 2nd WFD equipment this is connected as reconnecting；The session identification is used for the parameter set for indicating that the 2nd WFD equipment is obtained after capability negotiation corresponding with the session identification；The session identification connects the session identification of uniqueness for mark；The 2nd WFD equipment is the receiving device of the first WFD equipment；Receive the 2nd WFD equipment return reconnects response；The response sign that reconnects reconnects success.The present invention also discloses a kind of first WFD equipment, the 2nd WFD equipment and reconnect welding system.

Description

Reconnection method, system and WFD equipment

Technical field

The present invention relates to the field that reconnects of the communication technology, more particularly to a kind of reconnection method, system and WFD (Wi-Fi Direct) equipment.

Background technology

Wi-Fi Direct (WFD) project of the newest announcement of Wi-Fi Alliance, can allow user's notebook computer On Wireless Fidelity card bypass accessing points, be directly connected to wireless printer, digital camera, projecting apparatus, biography Sensor or plasma screen etc..Correspondingly, the equipment that can be directly realized by these functions is referred to as WFD equipment.

Carried out between WFD equipment during same screen process or audio video transmission, equipment switching can be run into or set Standby failure disconnects the situation for needing to reconnect, now, and two WFD equipment need slave unit to find to start From the beginning the information exchanges such as equipment, capability negotiation are carried out, that is, realize the process of connection new discovery equipment.So, The time that reconnecting needs will be long, greatly reduces connection speed.

The content of the invention

To solve existing technical problem, the embodiment of the present invention provide a kind of reconnection method, system and WFD equipment.

To reach above-mentioned purpose, what the technical scheme of the embodiment of the present invention was realized in：

The embodiments of the invention provide a kind of reconnection method, applied to the first WFD equipment, methods described Including：

When needing to reconnect, sent to the 2nd WFD equipment and reconnect mark and corresponding session identification；Institute State and reconnect mark and be used to indicate the 2nd WFD equipment this is connected as reconnecting；The session identification For indicating that the 2nd WFD equipment obtains the parameter set after capability negotiation corresponding with the session identification； The session identification connects the session identification of uniqueness for mark；The 2nd WFD equipment is described first The receiving device of WFD equipment；

Receive the 2nd WFD equipment return reconnects response；The response sign that reconnects is reconnected Success.

It is described to reconnect mark and the carrying of corresponding session identification in real time streaming transport protocol in such scheme It is described in (RTSP, Real Time Streaming Protocol) selection (OPTIONS) request message RTSP OPTIONS request messages are used to obtain the RTSP method collection that the 2nd WFD equipment is supported；

Correspondingly, it is described to reconnect response for RTSP OPTIONS responses.

In such scheme, methods described also includes：

It is described reconnect before point-to-point (P2P, Peer to Peer) connection establishment stage, to described second WFD equipment sends the session identification.

In such scheme, the session identification sent to the 2nd WFD equipment is carried in connection/connection request again In frame.

In such scheme, methods described also includes：

Before the P2P connections are set up, the session identification is generated；

The session identification is being locally stored.

The embodiment of the present invention additionally provides a kind of reconnection method, applied to the 2nd WFD equipment, the side Method includes：

Receive the transmission of the first WFD equipment reconnects mark and corresponding session identification；2nd WFD Equipment is the receiving device of the first WFD equipment；The session identification is mark connection uniqueness Session identification；

Mark is reconnected according to described, it is determined that the connection between the first WFD equipment is to reconnect；

According to the session identification, after the local capability negotiation corresponding with the session identification for searching storage Parameter set；

After searching successfully, sent to the first WFD equipment and reconnect response；It is described to reconnect answer list Levy and reconnect success.

In such scheme, it is described reconnect mark and corresponding session identification carry RTSP OPTIONS please Ask in message, the RTSP OPTIONS request messages are used to obtain what the 2nd WFD equipment was supported RTSP method collection；

Correspondingly, mark is reconnected described in being extracted from the RTSP OPTIONS request messages and corresponding Session identification；

It is described to reconnect response for RTSP OPTIONS responses.

In such scheme, methods described also includes：

It is described reconnect before P2P connection establishment stages, receive that the first WFD equipment sends is described Session identification；

In the local session identification for preserving and receiving；

Session establishment phase before described reconnect, is carried out after capability negotiation with the first WFD equipment, Preserve the corresponding relation of the session identification and the parameter set after capability negotiation.

In such scheme, the session identification of reception is carried in coupling/joining claim frame again；

Correspondingly, from it is described connection/again connection claim frame in extract the session identification.

The embodiment of the present invention provides a kind of first WFD equipment again, including：First transmitting element and first Receiving unit；Wherein,

First transmitting element, during for needing to reconnect, sending to the 2nd WFD equipment and reconnecting mark Know and corresponding session identification；The mark that reconnects is used to indicate this connection of the 2nd WFD equipment To reconnect；The session identification is used to indicate that the 2nd WFD equipment is obtained and the session identification pair Parameter set after the capability negotiation answered；The session identification connects the session identification of uniqueness for mark；It is described 2nd WFD equipment is the receiving device of the first WFD equipment；

First receiving unit, response is reconnected for receive that the 2nd WFD equipment returns；Institute State reconnect response characterize reconnect success.

In such scheme, the first WFD equipment also includes：Second transmitting element, is reconnected for described P2P connection establishment stages before connecing, the session identification is sent to the 2nd WFD.

In such scheme, the first WFD equipment also includes：Generation unit, for the P2P connections Before foundation, the session identification is generated；And the session identification is being locally stored.

The embodiment of the present invention additionally provides a kind of 2nd WFD equipment, including：Second receiving unit, determination Unit, searching unit and the 3rd transmitting element；Wherein,

Second receiving unit, is identified and corresponding for receiving reconnecting for the first WFD equipment transmission Session identification；The 2nd WFD equipment is the receiving device of the first WFD equipment；The session It is designated the session identification of mark connection uniqueness；

The determining unit, for according to described in reconnect mark, it is determined that with the first WFD equipment it Between connection to reconnect；

The searching unit, for according to the session identification, in local lookup storage and the session mark Know the parameter set after corresponding capability negotiation；

3rd transmitting element, after searching successfully, sends to the first WFD equipment and reconnects Response；The response sign that reconnects reconnects success.

In such scheme, the 2nd WFD equipment also includes：3rd receiving unit and memory cell；Its In,

3rd receiving unit, for the P2P connection establishment stages before described reconnect, receives described the The session identification that one WFD equipment is sent；

The memory cell, for preserving the session identification received local；And before described reconnect Session establishment phase, carried out with the first WFD equipment after capability negotiation, preserve the session identification With the corresponding relation of the parameter set after capability negotiation.

The embodiment of the present invention reconnects welding system there is provided one kind again, including：First WFD equipment and the 2nd WFD Equipment；Wherein,

The first WFD equipment, during for needing to reconnect, sending to the 2nd WFD equipment and reconnecting Connect mark and corresponding session identification；The session identification connects the session identification of uniqueness for mark；And connect That receives the 2nd WFD equipment return reconnects response；

The 2nd WFD equipment, is the data receiver end equipment of the first WFD equipment, for receiving What the first WFD equipment was sent reconnects mark and corresponding session identification；Mark is reconnected according to described Know, it is determined that the connection between the first WFD equipment is to reconnect；According to the session identification, Parameter set after the local capability negotiation corresponding with the session identification for searching storage；And after searching successfully, Sent to the first WFD equipment and reconnect response；The response sign that reconnects reconnects success.

Reconnection method provided in an embodiment of the present invention, system and WFD equipment are, it is necessary to when reconnecting, and One WFD equipment sends to the 2nd WFD equipment and reconnects mark and corresponding session identification；The session mark Know for the session identification of mark connection uniqueness；The 2nd WFD equipment is the first WFD equipment 2nd WFD equipment described in data receiver end equipment receives reconnecting for the first WFD equipment transmission and identified and right The session identification answered；Mark is reconnected according to described, it is determined that the connection between the first WFD equipment To reconnect；According to the session identification, in the local ability corresponding with the session identification for searching storage Parameter set after negotiation；And after searching successfully, sent to the first WFD equipment and reconnect response； It is described reconnect response characterize reconnect success, during due to reconnecting, the 2nd WFD equipment according only to What is received reconnects mark, to determine that this is connected as reconnecting, and corresponding according only to session identification lookup Parameter set after capability negotiation, so that the message interaction process that WFD capability negotiation stages are carried out is eliminated, Thus, substantially increasing connection speed, it can accelerate to reconnect termination process.

Brief description of the drawings

In accompanying drawing (it is not necessarily drawn to scale), similar reference can be in different views Described in similar part.Similar reference numerals with different letter suffix can represent the difference of similar component Example.Accompanying drawing generally shows each embodiment discussed herein by way of example and not limitation.

Fig. 1 is the process schematic for setting up connection in correlation technique between two WFD equipment；

Fig. 2 is the connection procedure schematic diagram that conversated between WFD equipment in correlation technique；

Fig. 3 is the reconnection method schematic flow sheet of the WFD sides of the embodiment of the present invention 1 the oneth；

Fig. 4 is the reconnection method schematic flow sheet of the WFD sides of the embodiment of the present invention 1 the 2nd；

Fig. 5 is the reconnection method schematic flow sheet of the embodiment of the present invention one；

Fig. 6 is the WFD structural representations of the embodiment of the present invention 2 the oneth；

Fig. 7 is the WFD structural representations of the embodiment of the present invention 2 the 2nd；

Fig. 8 is the double connection system structural representation of the embodiment of the present invention.

Embodiment

Below in conjunction with the accompanying drawings and embodiment to the present invention be described in further detail again.

Before the description embodiment of the present invention, presently relevant technology is first learnt about in detail.

As shown in figure 1, the process of connection is set up between two WFD equipment mainly to be included：WFD equipment is sent out Process and capability negotiation procedure (i.e. session establishment process) are set up in existing process, WFD connections.In addition, also It may further include WFD service discovery process.During practical application, WFD service discovery process is not one Surely the process to be performed, can need to determine the need for carrying out WFD service discovery process according to service.

Wherein, WFD information (Information) is all included in the above-mentioned information interacted during these Identify (ID) (i.e. WFD cells (IE, Information Element)), such as WFD equipment is progress Transmitted beacon (beacon) bag of connection, detecting request (probe request) and detecting response (probe Response) comprising this data structure of WFD IE in message.Some essential informations that WFD IE are carried It can to carry out Best link between two equipment.

Meanwhile, Fig. 2, which is shown, conversate between WFD equipment the i.e. WFD capability negotiation stages (WFD of connection Capability Negotiation) process, the process be referred to as WFD equipment both sides ability information friendship Mutual process, now WFD equipment be referred to as miracast equipment.As shown in Fig. 2 the process includes following step Suddenly：

Step 201：Source (Source) equipment sends M1 request messages to (Sink) equipment is received；

In other words, RTSP OPTIONS request messages are sent, to obtain the RTSP of Sink equipment support Method collection.

Step 202：Sink equipment receives transmission M1 response messages after M1 request messages.

Step 203：After M1 response messages are sent successfully, Sink equipment sends M2 to Source equipment please Seek message；

In other words, RTSP OPTIONS request messages are sent, to obtain what Source equipment was supported RTSP method collection.

Step 204：Source equipment received and disappear after M2 request messages to the transmission M2 responses of Source equipment Breath；

Step 205：After M2 response messages are sent successfully, Source equipment sends M3 to Sink equipment please Seek message；

In other words, RTSP parameter acquirings (GET_PARAMETER) request message is sent, to obtain The WFD capabilities lists of itself Sink equipment interested.

Wherein, the particular content of WFD capabilities lists can include audio format, video format, several resolutions Rate (such as 1080p, 720p, 480p etc.), and corresponding frame per second, the content protecting mode of support.

Step 206：Receive after M3 request messages, Sink equipment sends M3 responses to Source equipment and disappeared Breath；

Step 207：Receive after M3 response messages, Source equipment please by sending M4 to Sink equipment Message is asked to carry out arrange parameter；

Here, receive after M3 response messages, the information carried according to response message, Source equipment is determined The parameter set of follow-up WFD sessions (direction is that Source equipment is sent, the reception of Sink equipment) and by It is M4 request messages that Sink equipment, which sends RTSP arrange parameters (SET_PARAMETER) request message, To allow Sink equipment to set corresponding parameter.

Step 208：Receive after M4 request messages, Sink device replied M4 response messages；

Step 209：Receive M4 response messages and after message back of the response message for affirmative, Source is set It is standby to send M5 request messages to Sink equipment；

In other words, RTSP SET_PARAMETER (WFD-trigger-method) request message is sent, For functions such as triggering following connection foundation, broadcastings.

Step 210：Receive after M5 request messages, Sink equipment disappears to Source device replied M5 responses Breath；

Step 211：Receive M5 response messages and after message back of the response message for affirmative, Source is set It is standby to send M6 request messages to Sink equipment；

In other words, send RTSP and set up carrying connection foundation in (SETUP) request message, the message The message content of function.

Step 212：Receive M6 to ask after request message, Sink equipment is to Source device replied M6 responses Message；

Step 213：Receive M6 response messages and after message back of the response message for affirmative, Source is set It is standby to send M7 request messages to Sink equipment；

In other words, send RTSP and set up carrying connection broadcasting etc. in (PLAY) request message, the message The message content of function.

Step 214：Receive M7 to ask after request message, Sink equipment is to Source device replied M7 responses Message.

When receive M7 response messages and response message for affirmative message back after, illustrate WFD equipment it Between session connection process complete.After the completion of, can be carried out between Source equipment and Sink equipment with frequency or or Audio video transmission process.

Carried out between WFD equipment with during screen or audio video transmission, on the one hand, be frequently encountered equipment and cut The problem of changing, for example for, it is assumed that device A and equipment B are attached, afterwards again be switched to equipment A and equipment C are attached, but then may switch to equipment B again, device A and equipment during this To be reconnected between B；On the other hand, it is also possible to there is the problem of network failure disconnection reconnecting connects； In the case of these, it is necessary to re-start RTSP negotiations in existing technical scheme, that is, need to hold again M1-M7 correlated process steps in row step 201~214, i.e. miracast.Thus, will substantially reduce Connection speed, so as to reduce Consumer's Experience.

Based on this, in various embodiments of the present invention：When needing to reconnect, the first WFD equipment is to Two WFD equipment, which are sent, reconnects mark and corresponding session identification；The session identification is connected only for mark The session identification of one property；Mark that what the 2nd WFD equipment received that the first WFD equipment sends reconnect and Corresponding session identification；Mark is reconnected according to described, it is determined that the company between the first WFD equipment It is connected in and reconnects；According to the session identification, in the local energy corresponding with the session identification for searching storage Parameter set after power negotiation；And after searching successfully, sent to the first WFD equipment and reconnect response； The response sign that reconnects reconnects success.

Wherein, the 2nd WFD equipment is the data receiver end equipment of the first WFD equipment.

Embodiment one

The present embodiment provides a kind of reconnection method, applied to the first WFD equipment, as shown in figure 3, should Method comprises the following steps：

Step 301：When needing to reconnect, the first WFD equipment sends to the 2nd WFD equipment and reconnects mark Know and corresponding session identification；

Here, the mark that reconnects is used to indicate the 2nd WFD equipment this is connected as reconnecting, Not new connection；The session identification is used to indicate that the 2nd WFD equipment is obtained and the session identification Parameter set after corresponding capability negotiation；The session identification connects the session identification of uniqueness for mark.

The 2nd WFD equipment is the receiving device of the first WFD equipment.In other words, it is described First WFD equipment is sending ending equipment, the 2nd WFD equipment receiving devices.That is, by The first WFD equipment sends multi-medium data, and the first WFD is received by the 2nd WFD equipment The multi-medium data that equipment is sent.

It is described to need opportunity for being reconnected to be：The first WFD equipment is switched over or set Standby failure, which disconnects, to be needed to reconnect.

In one embodiment, the mark and corresponding session identification of reconnecting can be carried in RTSP In OPTIONS request messages, the RTSP OPTIONS request messages are used to obtain the 2nd WFD The RTSP method collection that equipment is supported.

In other words, can will reconnect mark and corresponding session identification can carry shown in Fig. 2 In M1 request messages.

Now, the content carried in M1 request messages is as shown in table 1.

Table 1

Wherein, in table 1, Reconnect and Session ID are the contents newly increased.Reconnect is Mark is reconnected, Session ID are session identification.

In table 1, Required represents the meaning that must be carried.From Source to Sink represent described The M1 request messages that one WFD equipment is sent to the 2nd WFD equipment；From Sink to Source tables Show the M1 response messages that the 2nd WFD equipment is sent to the first WFD equipment.Sending M1 should The purpose for answering message is：Allow the first WFD equipment to know and reconnect success.

During practical application, before being reconnected, the first WFD equipment and the 2nd WFD are set It is standby to be required to set and preserve the session identification, to carry out subsequent treatment.

Based on this, this method can also include：

It is described reconnect before P2P connection establishment stages, send the session to the 2nd WFD equipment Mark.

Specifically, the session identification sent to the 2nd WFD equipment can be carried in connection/connection request again In frame (Association/Reassociation Request Frame).

Here, the P2P connections establishment stage just refers to that process is set up in the WFD connections in Fig. 1.

The session identification is carried in Association/Reassociation Request Frame, can be according to Following methods are realized：

Because some essential informations carried in WFD IE can most preferably to be connected between two equipment Connect, therefore, can be to WFD in order to be embodied as connecting unique session identification between two WFD equipment WFD daughter elements (subelements) in IE are extended, so that WFD subelements bags Session identification (Session ID) content is contained, the particular content of extension can be such as the Subelement in table 2 ID is the content shown in 11.

Table 2

Meanwhile, in order that two WFD equipment being attached set and preserve above-mentioned session identification (Session ID), it is necessary to connect the Association/Reassociation Request Frame transmitted by establishment stage in equipment Expand content with Association/Reassociation Response Frame. The particular content expanded in Association/Reassociation Request Frame can be as in table 3 Subelements is the content shown in Session ID correspondence rows, in Association/Reassociation The particular content expanded in Response Frame can as in table 4 Subelements be Session ID correspondence Content shown in row.

Table 3

Table 4

Wherein, Association/Reassociation Response Frame carry above-mentioned session identification (Session ID effect) is：The first WFD equipment is allowed to know that the 2nd WFD equipment have received the session Mark.

In one embodiment, this method can also include：

The session identification is being locally stored.

Here, the session identification of the first WFD equipment generation can be a string of random numbers, as long as only One mark.

Step 302：Receive the 2nd WFD equipment return reconnects response；It is described to reconnect answer list Levy and reconnect success.

Here, the 2nd WFD equipment, which is received, reconnects after mark and corresponding session identification, according to institute State and reconnect mark and know that this is connected as reconnecting, therefore in local the searching storage and session identification Parameter set after corresponding capability negotiation；, can be to the first WFD after corresponding parameter set is found Equipment send reconnect response, now when reconnect mark and corresponding session identification carry M1 request disappear When in breath, the 2nd WFD equipment can return to M1 response messages, i.e. institute to the first WFD equipment State and reconnect response for RTSP OPTIONS responses.

Wherein, when the 2nd WFD equipment can not locally find corresponding parameter set, that is, search During failure, the entire flow shown in Fig. 2 can be carried out with the first WFD equipment, to complete session establishment Process.

It should be noted that：The session identification (Session ID) is different from common device identification, and it is more As a manager (Handler), the session identification is associated with a communication process between WFD equipment Parameter set after capability negotiation, exactly because being associated with this parameter set, just make it that the 2nd WFD is set It is standby to realize the effect quickly reconnected.

The present embodiment additionally provides a kind of reconnection method, applied to the 2nd WFD equipment, as shown in Figure 4 This method comprises the following steps：

Step 401：Receive the transmission of the first WFD equipment reconnects mark and corresponding session identification；

Here, the session identification connects the session identification of uniqueness for mark.

In one embodiment, the mark and corresponding session identification of reconnecting can be carried in RTSP In OPTIONS request messages, the RTSP OPTIONS request messages are used to obtain the 2nd WFD The RTSP method collection that equipment is supported；

Correspondingly, the 2nd WFD equipment is extracted described from the RTSP OPTIONS request messages Reconnect mark and corresponding session identification.

Now, the content carried in M1 request messages is as shown in table 1.

Based on this, this method can also include：

It is described reconnect before P2P connection establishment stages, the 2nd WFD equipment receives described first The session identification that WFD equipment is sent；

In the local session identification for preserving and receiving；

Session establishment phase before described reconnect, is carried out after capability negotiation with the first WFD equipment, The 2nd WFD equipment preserves the corresponding relation of the session identification and the parameter set after capability negotiation.

Wherein, the session identification that the 2nd WFD equipment is received can be carried In Association/Reassociation Request Frame；

Correspondingly, the 2nd WFD equipment is from Association/Reassociation Request Frame Extract the session identification.

Because some essential informations carried in WFD IE can most preferably to be connected between two equipment Connect, therefore, can be to WFD in order to be embodied as connecting unique session identification between two WFD equipment WFD subelements in IE are extended, so that WFD subelements contain session The content of (Session ID) is identified, the particular content of extension can be such as the Subelement ID in table 2 Content shown in 11.

Meanwhile, in order that two WFD equipment being attached set and preserve above-mentioned session identification (Session ID), it is necessary to connect the Association/Reassociation Request Frame transmitted by establishment stage in equipment Expand content with Association/Reassociation Response Frame. The particular content expanded in Association/Reassociation Request Frame can be as in table 3 Subelements is the content shown in Session ID correspondence rows, in Association/Reassociation The particular content expanded in Response Frame can be Session ID couple such as the Subelements in table 4 Content shown in should going.

Step 402：Mark is reconnected according to described, it is determined that the connection between the first WFD equipment is Reconnect；

Step 403：According to the session identification, the corresponding with the session identification of storage is searched local Parameter set after capability negotiation；

Step 404：After searching successfully, sent to the first WFD equipment and reconnect response；It is described to reconnect Scoop out and answer sign and reconnect success.

Here, when the 2nd WFD equipment is to get to reconnect mark and right by M1 request messages During the session identification answered, search after parameter set success, the 2nd WFD equipment can be to the first WFD Equipment returns to M1 response messages, i.e., described to reconnect response for RTSP OPTIONS responses.

It should be noted that：The session identification (Session ID) is different from common device identification, and it is more As a Handler, the session identification is associated with a communication process capability negotiation between WFD equipment Parameter set afterwards, exactly because being associated with this parameter set, just causes the 2nd WFD equipment real The effect now quickly reconnected.

The present embodiment additionally provides a kind of reconnection method, as shown in figure 5, this method comprises the following steps：

Step 501：When needing to reconnect, the first WFD equipment sends to the 2nd WFD equipment and reconnects mark Know and corresponding session identification；

Step 502：The 2nd WFD equipment receives reconnecting for the first WFD equipment transmission and identified and right The session identification answered；Mark is reconnected according to described, it is determined that the connection between the first WFD equipment To reconnect；According to the session identification, in the local ability corresponding with the session identification for searching storage Parameter set after negotiation；And after searching successfully, sent to the first WFD equipment and reconnect response；

Here, the response sign that reconnects reconnects success.

It should be noted that：The concrete processing procedure of the first WFD equipment and the 2nd WFD equipment As detailed above, repeat no more here.

Reconnection method provided in an embodiment of the present invention is, it is necessary to when reconnecting, and the first WFD equipment is to second WFD equipment, which is sent, reconnects mark and corresponding session identification；The session identification is mark connection uniqueness Session identification；The 2nd WFD equipment is described in the data receiver end equipment of the first WFD equipment 2nd WFD equipment receives reconnecting for the first WFD equipment transmission and identified and corresponding session identification；According to It is described to reconnect mark, it is determined that the connection between the first WFD equipment is to reconnect；According to described Session identification, the parameter set after the local capability negotiation corresponding with the session identification for searching storage；And After searching successfully, sent to the first WFD equipment and reconnect response；It is described to reconnect response sign Success is reconnected, during due to reconnecting, the 2nd WFD equipment reconnects mark according only to what is received, To determine that this is connected as reconnecting, and the parameter set after corresponding capability negotiation is searched according only to session identification, So as to eliminate the message interaction process that WFD capability negotiation stages are carried out, thus, the company of substantially increasing Speed is connect, can accelerate to reconnect termination process, and then improves Consumer's Experience, the interconnection of WFD equipment is improved Practicality.

Embodiment two

Method to realize the embodiment of the present invention, the present embodiment provides a kind of first WFD equipment, such as Fig. 6 Shown, the first WFD equipment includes：First transmitting element 61 and the first receiving unit 62；Wherein,

First transmitting element 61, during for needing to reconnect, sending to the 2nd WFD equipment and reconnecting Mark and corresponding session identification；The mark that reconnects is used to indicate this company of the 2nd WFD equipment It is connected in and reconnects；The session identification is used to indicate that the 2nd WFD equipment is obtained and the session identification Parameter set after corresponding capability negotiation；The session identification connects the session identification of uniqueness for mark；

First receiving unit 62, response is reconnected for receive that the 2nd WFD equipment returns； The response sign that reconnects reconnects success.

Wherein, the 2nd WFD equipment is the receiving device of the first WFD equipment.In other words, The first WFD equipment is sending ending equipment, the 2nd WFD equipment receiving devices.That is, Multi-medium data is sent by the first WFD equipment, described first is received by the 2nd WFD equipment The multi-medium data that WFD equipment is sent.

Now, the content carried in M1 request messages is as shown in table 1.

Based on this, the first WFD equipment can also include：Second transmitting element, is reconnected for described Preceding P2P connection establishment stages, the session identification is sent to the 2nd WFD equipment.

Specifically, it can be carried in connection/connection request again to the 2nd WF equipment D session identifications sent In frame (Association/Reassociation Request Frame).

Because some essential informations carried in WFD IE can most preferably to be connected between two equipment Connect, therefore, can be to WFD in order to be embodied as connecting unique session identification between two WFD equipment WFD subelements in IE) it is extended, so that WFD subelements contain session The content of (Session ID) is identified, the particular content of extension can be such as the Subelement ID in table 2 Content shown in 11.

In one embodiment, the first WFD equipment can also include：Generation unit, for the P2P Before connection is set up, the session identification is generated；And the session identification is being locally stored.

Here, the session identification of the generation unit generation can be a string of random numbers, as long as unique mark .

The 2nd WFD equipment, which is received, to be reconnected after mark and corresponding session identification, is reconnected according to described Connect mark and know that this is connected as reconnecting, therefore the corresponding with the session identification of storage is searched local Parameter set after capability negotiation；After corresponding parameter set is found, it can be sent out to the first WFD equipment Send and reconnect response, now when reconnecting mark and corresponding session identification is carried in M1 request messages, The 2nd WFD equipment can return to M1 response messages to the first WFD equipment, i.e., described to reconnect Response is RTSP OPTIONS responses.

During practical application, the first transmitting element 61, the first receiving unit 62 and the second transmitting element can be by In one WFD equipment central processing unit (CPU, Central Processing Unit), microprocessor (MCU, Micro Control Unit), digital signal processor (DSP, Digital Signal Processor) or can compile Journey logic array (FPGA, Field-Programmable Gate Array) combines transceiver implementation；It is described Generation unit can be realized by CPU, MCU, DSP or FPGA in the first WFD equipment.

Method to realize the embodiment of the present invention, the present embodiment additionally provides the 2nd WFD of one kind, such as Fig. 7 institutes Show, the 2nd WFD equipment includes：Second receiving unit 71, determining unit 72, searching unit 73 and 3rd transmitting element 74；Wherein,

Second receiving unit 71, for receive the first WFD equipment send reconnect mark and correspondingly Session identification；The session identification connects the session identification of uniqueness for mark；

The determining unit 72, for according to described in reconnect mark, it is determined that with the first WFD equipment Between connection to reconnect；

The searching unit 73, for according to the session identification, in local lookup storage and the session Identify the parameter set after corresponding capability negotiation；

3rd transmitting element 74, after searching successfully, sends to the first WFD equipment and reconnects Scoop out and answer；The response sign that reconnects reconnects success.

Correspondingly, second receiving unit 71 extracts institute from the RTSP OPTIONS request messages State and reconnect mark and corresponding session identification.

Now, the content carried in M1 request messages is as shown in table 1.

Based on this, the 2nd WFD equipment can also include：3rd receiving unit and memory cell；Wherein,

Here, when second receiving unit 71 is to get to reconnect mark and right by M1 request messages During the session identification answered, search after parameter set success, the 3rd transmitting element 74 can be to the first WFD Equipment returns to M1 response messages, i.e., described to reconnect response for RTSP OPTIONS responses.

Wherein, when the searching unit 73 can not locally find corresponding parameter set, that is, failure is searched When, the entire flow shown in Fig. 2 can be carried out with the first WFD equipment, to complete session establishment process.

During practical application, the second receiving unit 71, the 3rd transmitting element 74, the 3rd receiving unit can be by second CPU, MCU, DSP or FPGA combination transceiver implementation in WFD equipment；The determining unit 72, Searching unit 73 and memory cell can be by CPU, MCU, DSP or FPGA in the 2nd WFD equipment Realize.

Method to realize the embodiment of the present invention, the present embodiment additionally provides one kind and reconnects welding system, such as Fig. 8 Shown, the system includes：First WFD equipment 81 and the 2nd WFD equipment 82；Wherein,

The first WFD equipment 81, during for needing to reconnect, sends out to the 2nd WFD equipment 82 Send and reconnect mark and corresponding session identification；The session identification connects the session identification of uniqueness for mark； And receive that the 2nd WFD equipment 82 returns reconnect response；

The 2nd WFD equipment 82, is the data receiver end equipment of the first WFD equipment 81, is used Identified and corresponding session identification in receiving reconnecting for the first WFD equipment 81 transmission；Reconnected according to described Mark is connect, it is determined that the connection between the first WFD equipment 81 is to reconnect；According to the session mark Know, the parameter set after the local capability negotiation corresponding with the session identification for searching storage；And searching After success, sent to the first WFD equipment 81 and reconnect response；The response sign that reconnects is reconnected It is connected into work(.

It should be noted that：The specific place of the first WFD equipment 81 and the 2nd WFD equipment 82 Reason process is repeated no more here as detailed above.

Scheme provided in an embodiment of the present invention is, it is necessary to which when reconnecting, the first WFD equipment is set to the 2nd WFD Preparation, which is sent, reconnects mark and corresponding session identification；The session identification connects the session of uniqueness for mark Mark；The 2nd WFD equipment is second described in the data receiver end equipment of the first WFD equipment WFD equipment receives reconnecting for the first WFD equipment transmission and identified and corresponding session identification；According to described Mark is reconnected, it is determined that the connection between the first WFD equipment is to reconnect；According to the session Mark, the parameter set after the local capability negotiation corresponding with the session identification for searching storage；And looking into After looking for successfully, sent to the first WFD equipment and reconnect response；The response sign that reconnects is reconnected Work(is connected into, during due to reconnecting, the 2nd WFD equipment reconnects mark according only to what is received, comes true Fixed this is connected as reconnecting, and searches the parameter set after corresponding capability negotiation according only to session identification, from And the message interaction process that WFD capability negotiation stages are carried out is eliminated, thus, substantially increasing connection Speed, can accelerate to reconnect termination process, and then improve Consumer's Experience, improve the reality of WFD equipment interconnection The property used.

It should be understood by those skilled in the art that, embodiments of the invention can be provided as method, system or meter Calculation machine program product.Therefore, the present invention can using hardware embodiment, software implementation or combine software and The form of the embodiment of hardware aspect.Moreover, the present invention can be used wherein includes calculating one or more The computer-usable storage medium of machine usable program code (includes but is not limited to magnetic disk storage and optical storage Device etc.) on the form of computer program product implemented.

The present invention is with reference to method according to embodiments of the present invention, equipment (system) and computer program product Flow chart and/or block diagram describe.It should be understood that flow chart and/or side can be realized by computer program instructions Each flow and/or square frame in block diagram and flow and/or the knot of square frame in flow chart and/or block diagram Close.Can provide these computer program instructions to all-purpose computer, special-purpose computer, Embedded Processor or The processor of other programmable data processing devices is to produce a machine so that by computer or other can The instruction of the computing device of programming data processing equipment is produced for realizing in one flow or multiple of flow chart The device for the function of being specified in one square frame of flow and/or block diagram or multiple square frames.

These computer program instructions, which may be alternatively stored in, can guide computer or other programmable data processing devices In the computer-readable memory worked in a specific way so that be stored in the computer-readable memory Instruction, which is produced, includes the manufacture of command device, and the command device is realized in one flow of flow chart or multiple streams The function of being specified in one square frame of journey and/or block diagram or multiple square frames.

These computer program instructions can be also loaded into computer or other programmable data processing devices, made Obtain and perform series of operation steps on computer or other programmable devices to produce computer implemented place Reason, so that the instruction performed on computer or other programmable devices is provided for realizing in flow chart one The step of function of being specified in flow or multiple flows and/or one square frame of block diagram or multiple square frames.

The above, only presently preferred embodiments of the present invention is not intended to limit the protection model of the present invention Enclose.

Claims

1. a kind of reconnection method, it is characterised in that applied to the first WFD equipment, methods described includes：

2. according to the method described in claim 1, it is characterised in that described to reconnect mark and corresponding meeting Words mark is carried in real time streaming transport protocol RTSP selection OPTIONS request messages, the RTSP OPTIONS request messages are used to obtain the RTSP method collection that the 2nd WFD equipment is supported；

3. method according to claim 1 or 2, it is characterised in that methods described also includes：

It is described reconnect before point-to-point P2P connections establishment stage, to the 2nd WFD equipment send institute State session identification.

4. method according to claim 3, it is characterised in that sent to the 2nd WFD equipment Session identification carry connection/again connection claim frame in.

5. method according to claim 3, it is characterised in that methods described also includes：

The session identification is being locally stored.

6. a kind of reconnection method, it is characterised in that applied to the 2nd WFD equipment, methods described includes：

7. method according to claim 6, it is characterised in that described to reconnect mark and corresponding meeting Words mark is carried in RTSP OPTIONS request messages, and the RTSP OPTIONS request messages are used for Obtain the RTSP method collection that the 2nd WFD equipment is supported；

It is described to reconnect response for RTSP OPTIONS responses.

8. the method according to claim 6 or 7, it is characterised in that methods described also includes：

In the local session identification for preserving and receiving；

9. method according to claim 8, it is characterised in that the session identification of reception is carried in connection / join again in claim frame；

10. a kind of first WFD equipment, it is characterised in that the first WFD equipment includes：First hair Send unit and the first receiving unit；Wherein,

11. equipment according to claim 10, it is characterised in that the first WFD equipment is also wrapped Include：Second transmitting element, for the P2P connection establishment stages before described reconnect, to the 2nd WFD Send the session identification.

12. equipment according to claim 11, it is characterised in that the first WFD equipment is also wrapped Include：Generation unit, before being set up for the P2P connections, generates the session identification；And locally depositing Store up the session identification.

13. a kind of 2nd WFD equipment, it is characterised in that the 2nd WFD equipment includes：Second connects Receive unit, determining unit, searching unit and the 3rd transmitting element；Wherein,

14. equipment according to claim 13, it is characterised in that the 2nd WFD equipment is also wrapped Include：3rd receiving unit and memory cell；Wherein,

15. one kind reconnects welding system, it is characterised in that the system includes：First WFD equipment and Two WFD equipment；Wherein,