CN103200650B - The method of wireless communication system resource bid is realized based on Session Initiation Protocol - Google Patents
The method of wireless communication system resource bid is realized based on Session Initiation Protocol Download PDFInfo
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Abstract
The invention provides a kind of method realizing the application of wireless communication system Radio Resource based on Session Initiation Protocol, comprise the steps: that (1) first sip proxy server receives the session demand signalling of being initiated by caller, and therefrom extract the call parameter of wireless communication resources application; (2) described first sip proxy server sends just in processing signaling to caller, described session invitation signaling is forwarded to switching center simultaneously; (3) described switching center processes described session invitation signaling, and sends indication signaling to described first sip proxy server; (4) described first sip proxy server sets up session action after receiving described indication signaling.Method of the present invention effectively can avoid the ineffective occupation of local wireless communication channel resource, improves the message capacity of system.
Description
Technical field
The present invention relates to radio communication, particularly, relate to a kind of method that dialogue-based initiation protocol (SIP) realizes wireless communication system resource bid.
Background technology
SIP(Session Initiation Protocol, i.e. Session initiation Protocol) be a kind of application layer protocol setting up, revise and stop Multimedia session in an ip network, it is that internet engineering task group (IETF) is in a part of constantly carrying out standardized multi-media protocol system.SIP is described to the session for generating, revising and terminate between one or more participant.These sessions comprise Internet multimedia conferencing, and Internet or any IP network call and multimedia are issued, and the member in session can be communicated by the network of multicast or unicast contact.
Session Initiation Protocol is indifferent to bearer network, can work in the multiple communication network comprising ATM (asynchronous transfer mode), can also run on comprise TCP (transmission control protocol), UDP (User Datagram Protoco (UDP)), SCTP (SCTP) various transport layer protocols on.Sip user is the URL mark by being similar to e-mail address, such as: sip:myname@mycompany.com, with the different terminal of unified name identification and communication mode, sufficient flexibility can be provided for network service and user use in this way.
Distinguish by logic function, SIP system is made up of 4 kinds of functional entitys: user agent, proxy server, Redirect Server and registrar.
User agent (User Agent) is divided into two parts: User Agent Client (User Agent Client), is responsible for making a call; Subscriber proxy server (User Agent Server), is responsible for call accepted and makes response.Both composition user agents are present in user terminal.
The request that reception user agent sends is responsible for by proxy server (Proxy Server), according to network strategy, corresponding server issued in request, and makes response according to the response received to user.
Redirect Server (Redirect Server) is for returning to calling party by position new for user when needed, and calling party can be called out again according to the reposition obtained.
Registrar (Registrar) for receiving and process the registration request of user side, the registration of completing user address.
Utilizing SIP to set up in the process of session, adopting the mode of Request-Response, namely client is to the request of server and server to the response of client, the signaling mode comprising several frequently seen as follows:
1、INVITE
INVITE request is used for requiring user or service participation session.The session that callee is invited to participate in can be described, as medium type, the medium type sent and some parameters thereof that caller can receive in the message body of INVITE request.Must illustrate that callee is ready to receive which kind of media in the message body of response to the success response of INVITE request, or the media that callee sends are described.Server can automatically be invited with 200 (OK) response.
2、ACK
ACK request is used for user end to server and confirms that it have received the final response to INVITE request, and ACK only uses together with INVITE request.The confirmation that 2xx finally responds is sent by client user agency, other confirmation finally responded is sent by first agency or first client user agency receiving response.
3、BYE
To server, User Agent Client BYE request shows that it thinks call release.Can be sent by calling party and also can be sent by callee, a side of calling must send BYE request before release (hanging up) calling, and this side receiving BYE request must stop sending Media Stream to the side sending BYE request.
The response message conditional code (Status Code) of three integers and reason phrase (Reason Phrase) represent the answer to asking to make, conditional code is used for machine recognition operation, reason phrase describes the simple text of conditional code, operates for manual identified.
Calling in SIP/IP system is that the three-way handshake of inviting request, success response and ACK confirmation to ask by INVITE realizes, and namely when calling telephone agent will make a call, it constructs an INVITE, and sends to callee.Callee determines to accept this calling, with regard to loopback success response (conditional code is 200) after receiving and inviting.After calling party receives success response, send ACK request to the other side.After callee receives ACK request, access success is set up.
The termination of calling is realized by BYE request message.When either party participating in calling out wants end call, it is a structure BYE request message just, and sends to the other side.After the other side receives BYE request, release calls out relevant resource, loopback success response therewith, represents that calling stops.
In prior art, being invited by wireless communication system initiation session as calling party when sip terminal and realize session establishment will through the R(Request of four-stage)-R(Response) process:
First stage: terminal sends INVITE signaling through the application of Calling Side sip proxy server to local radio communication system resource;
Second stage, Calling Side sip proxy server forwards INVITE signaling to switching center to switching center;
Phase III, INVITE signaling is passed on to callee side sip proxy server by switching center;
Fourth stage, callee side sip proxy server is to the application of local radio communication system resource.
In first and second stage, the R-R reciprocal process namely between Calling Side terminal and Calling Side sip proxy server and switching center, its concrete signaling process as shown in Figure 1:
1, the INVITE signalling that sends of caller is to Calling Side sip proxy server, and Calling Side sip proxy server extracts the associated session parameter informations such as call preference level, service priority, medium type, as the call parameter of wireless communication resources application;
2, Calling Side sip proxy server sends 100(Trying to caller) signaled processes, simultaneously according to the associated session parameter in INVITE signaling to Radio Resource needed for this session of wireless communication system application;
If 3 Calling Side sip proxy servers receive the Radio Resource application success message that wireless communication system returns, then forward caller INVITE signaling to switching center; If Calling Side sip proxy server receives Radio Resource application failed message, then send Bye signaling to caller and discharge this session;
4, switching center receives INVITE signaling process relevant field, sends successfully indicate 200(OK after confirmation answering call to Calling Side sip proxy server) signaling; If this session is refused by switching center, then send Bye signaling to Calling Side sip proxy server and discharge this session and forward Bye signaling to caller;
5, Calling Side sip proxy server receives the 200(OK that switching center returns) after signaling, send ACK signaling to switching center and confirm, and send to caller successfully indicate 200(OK) signaling;
6, caller receives and successfully indicates 200(OK) send ACK to Calling Side sip proxy server after signaling and confirm at heart, set up radio communication between caller, switching center and connect, start wireless session communication.
In third and fourth stage, namely switching center and callee side sip proxy server and called between R-R reciprocal process, its concrete signaling process as shown in Figure 2:
1, switching center is by INVITE Signaling Transfer to callee side sip proxy server, and callee side sip proxy server extracts the associated session parameter informations such as call preference level, service priority, medium type, as the call parameter of wireless communication resources application;
2, callee side sip proxy server sends 100(Trying to switching center) signaled processes, and is forwarded to called by INVITE signaling;
3, the called INVITE(of receiving signaling) and process relevant field, send to callee side sip proxy server after confirmation answering call and successfully indicate 200(OK) signaling;
4, callee side sip proxy server receives the called 200(OK returned) after signaling, confirm to called transmission ACK signaling, callee side sip proxy server is to Radio Resource needed for this session of local radio communication system application simultaneously;
If 5 callee side sip proxy servers receive the Radio Resource application success message that wireless communication system returns, then send to switching center and successfully indicate 200(OK) signaling; If callee side sip proxy server receives Radio Resource application failed message, then send release Bye signaling respectively to called and switching center, terminate this session;
6, switching center receives and successfully indicates 200(OK) send ACK message to callee side sip proxy server after message and confirm, set up radio communication between called, switching center and connect, start session communication.
In above-mentioned first, fourth stage, namely by the sip proxy server of calling and called side in the process of local radio communication system application Radio Resource, if failure, then this conversation end of being initiated by calling party, this session discharges, and waits for and initiates next session.
In this process, for the Calling Side shown in Fig. 3, R-R Signalling exchange situation is in the process described.
1, caller is by INVITE signalling to Calling Side sip proxy server, and Calling Side sip proxy server extracts the associated session parameter informations such as call preference level, service priority, medium type, as the call parameter of wireless communication resources application;
2, Calling Side sip proxy server sends 100(Trying to caller) signaled Calling Side sip proxy server in process, and according to the relevant parameter in INVITE signaling to Radio Resource needed for this session of wireless communication system application;
3, Calling Side sip proxy server receives the Radio Resource application failed message that wireless communication system returns, and Calling Side sip proxy server sends Bye signaling to caller and discharges this session.
Set up in the process of session above-mentioned based on SIP, first be to local radio communication system request channel resource by Calling Side sip proxy server, after local channel resource bid success, INVITE signaling is forwarded to switching center by side, then arrives callee side sip proxy server
This session establishment mode, there is the huge waste to local wireless communication channel---Calling Side sip proxy server is after the success of local radio communication system request channel resource, this channel is namely shared by the caller of this session of initiation, but now session is not yet successfully established, also waiting for callee side sip proxy server and called feedback.
If the step 3 in third and fourth stage above-mentioned, called response unconfirmed, namely called transmission to callee side sip proxy server successfully indicates 200(OK) signaling, or step 4, callee side sip proxy server is to Radio Resource failure needed for this session of local radio communication system application, and the occupied but channel resource not yet setting up session of Calling Side will have to again discharge.
In wireless communication system numerous and jumbled now, radio channel resource is very nervous and is in busy time division multiplexing (TDMA) state, and especially in some hot spot regions, radio channel resource has suitable scarcity.Once any point in communication link, or caller and sip proxy server, or sip proxy server and switching center's Signalling exchange occur abnormal, the invalid application of Radio Resource or Radio Resource will be caused to discharge, especially the Signalling exchange of callee side occurs abnormal, directly causes the channel ineffective occupation of Calling Side local radio communication system, or even cannot discharge, thus make wireless resource utility efficiency low, influential system performance.
Summary of the invention
For solving the problem, the present invention proposes a kind of method realizing wireless communication system resource bid based on Session Initiation Protocol newly, this method ensure that and only complete caller and switching center's Signalling exchange, the application way of radio channel resource is applied for again after Signalling exchange success, thus simplify Signalling exchange flow process, avoid at present based on the problem of the wireless communication resources ineffective occupation existed in the session establishment of SIP to greatest extent, effectively improve communication capacity and the performance of wireless communication system.
The present invention program first completes caller and apply for Radio Resource again after called signaling call flow process, and therefore in the signalling interactive process of calling and called, needed for this session, Radio Resource still may be used for other communication traffic.After the Signalling exchange success of calling and called again by the first sip proxy server to Radio Resource needed for this session of wireless telecommunication system application, decrease the time that session takies Radio Resource so to greatest extent, improve wireless resource utility efficiency.
Its concrete solution is as follows:
Realize a method for wireless communication system Radio Resource application based on Session Initiation Protocol, comprise the steps:
(1) first sip proxy server receives the session demand signalling of being initiated by caller, and therefrom extracts the call parameter of wireless communication resources application;
(2) described first sip proxy server sends just in processing signaling to caller, described session invitation signaling is forwarded to switching center simultaneously;
(3) described switching center processes described session invitation signaling, and sends indication signaling to described first sip proxy server;
(4) described first sip proxy server sets up session action after receiving described indication signaling.
According to the present invention, the call parameter of the described extraction wireless communication resources application in described step (1) comprises bandwidth information, call preference level, service priority, the media type information extracted in session demand signalling.
According to the present invention, the described switching center in described step (3) processes described session invitation signaling, comprises following flow process:
Described session invitation signaling is transmitted to the second sip proxy server by described switching center, session invitation signaling described in described second sip proxy server process, and returns described indication signaling to switching center.
According to the present invention, described indication signaling comprises successfully indication signaling and release indication signaling, it is characterized in that:
From session invitation signaling, extract the call parameter of wireless communication resources application, described session invitation signaling is transmitted to called and after called party confirmed answering call, described second sip proxy server is to wireless communication system application Radio Resource simultaneously;
After Radio Resource application success, described second sip proxy server returns successfully indication signaling to switching center;
In called reject response calling or Radio Resource application failure, described second sip proxy server returns release indication signaling to switching center.
According to the present invention, described in described step (4) sets up session action, comprises following flow process:
1, namely described first sip proxy server sends to described switching center and confirms signaling receiving described successful indication signaling, and sip proxy server is to Radio Resource needed for this session of wireless communication system application simultaneously;
2, namely described first sip proxy server forwards described release indication signaling to caller receiving described release indication signaling, and sip proxy server discharges this session simultaneously.
According to the present invention, described in described step (4) sets up session action, comprises further:
Described first sip proxy server receives the Radio Resource application success/failed message that wireless communication system returns, namely to caller send successfully/discharge indication signaling.
Described release indication signaling is also addressed to switching center.
Described session invitation signaling is INVITE signaling.
According to the present invention, described successful indication signaling is 200(OK) signaling; Described release indication signaling is Bye signaling.
According to the present invention, described is being just 100(Trying in processing signaling).
The method realizing wireless communication system resource bid based on Session Initiation Protocol of the present invention, effectively can avoid the ineffective occupation of local wireless communication channel resource, improves the message capacity of system.
Accompanying drawing explanation
Fig. 1 is the Signalling exchange R-R flow process of caller Calling Side when making a call in prior art
Fig. 2 is the Signalling exchange R-R flow process of the called callee side when replying in prior art;
Signalling exchange R-R flow process when Fig. 3 is Radio Resource application failure in prior art;
Fig. 4 is the Signalling exchange R-R flow process of caller Calling Side when making a call proposed by the invention;
Fig. 5 is the Signalling exchange R-R flow process of the called callee side when replying proposed by the invention;
Signalling exchange R-R flow process when Fig. 6 is Radio Resource application failure proposed by the invention.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiment of the present invention is described in detail.But those skilled in the art understand, the specific embodiment of the present invention is not only construed as limiting the scope of the present invention in order to illustrate.Anyly the present invention modified or equivalent to replace, and not departing from the amendment of the spirit and scope of the present invention or local is replaced, all should be encompassed within protection scope of the present invention.
Embodiment 1
First, caller is as shown in Figure 4 when making a call, and caller is through the R-R Signalling exchange flow process between local radio communication system and Calling Side sip proxy server and information centre.
The order of session invitation letter is transferred to Calling Side sip proxy server by wireless communication system by caller, Calling Side sip proxy server extracts the information such as call preference level, service priority, required channel, medium type, as the call parameter of wireless communication resources application.Wherein, described session invitation signaling can be INVITE signaling.
Caller, as a kind of user terminal, can be any one communication terminal in access to wireless communication system, such as the terminal facilities that mobile phone, palmtop PC, PC, notebook etc. are like this.
And wireless communication system also can be the wireless communication system of any one type, can be the digital mobile communication systems such as 2G mobile communication system, such as GSM, CDMA; Also can be the 3G mobile communication system such as TD-SCDMA, WCDMA, CDMA2000, WiMAX; Can also be Wi-Fi network or NGN, LTE, 4G of local ... wireless communication network system.
Calling Side sip proxy server, after receiving session invitation signaling, is namely sent just in processing signaling to caller by wireless communication system, such as 100(Trying) signaling, show that Calling Side sip proxy server is processing its reply sent and inviting to caller.
Send at Calling Side sip proxy server just while processing signaling to caller, the order of session invitation letter is forwarded to switching center, after switching center receives the next session invitation signaling of Calling Side sip proxy server forwarding, namely the relevant field entrained by it is processed, successful indication signaling is sent to Calling Side sip proxy server, to show that it agrees to set up session with caller after confirmation answering call.
Wherein, described successful indication signaling can be 200(OK) signaling.
After Calling Side sip proxy server receives the successful indication signaling that switching center returns, namely send to switching center and confirm signaling, to show that Calling Side sip proxy server receives, and preparation is made in the foundation for session.Calling Side sip proxy server is to Radio Resource needed for this session of wireless communication system application immediately.
Wherein, the confirmation signaling that Calling Side sip proxy server sends to switching center can be ACK signaling.
The Radio Resource application success message that Calling Side sip proxy server is receiving wireless communication system and returns, namely sends successful indication signaling by wireless communication system to caller.Namely caller sends ACK message by wireless communication system to Calling Side sip proxy server after receiving successfully indication signaling and confirms.So far, set up radio communication between caller, switching center and connect, start session communication.
Embodiment 2
In the process of embodiment 1, switching center processes the relevant field in session invitation signaling and confirms answering call, relate to switching center and called between Signalling exchange, as shown in Figure 5, the called Signalling exchange R-R flow process of callee side when replying.
Switching center by INVITE signalling to callee side sip proxy server, callee side sip proxy server extracts the information such as call preference level, service priority, required channel, medium type, call parameter when carrying out wireless communication resources application as callee side sip proxy server to wireless communication system.
Callee side sip proxy server sends 100(Trying to switching center) signaling shows that callee side sip proxy server processes calling, callee side sip proxy server by wireless communication system by INVITE signalling to called.
The called INVITE of receiving signaling also processes relevant field, to be sent successfully indicate 200(OK after confirmation answering call by wireless communication system to callee side sip proxy server) signaling.
Callee side sip proxy server receives the called 200(OK returned) after signaling, by wireless communication system to called transmission ACK signaling to carry out message authentication, callee side sip proxy server is to Radio Resource needed for this session of wireless communication system application immediately.
Callee side sip proxy server receives the Radio Resource application success message that wireless communication system returns, namely send to switching center and successfully indicate 200(OK) signaling, this 200(OK) the successful indication signaling that returns to Calling Side sip proxy server of signaling and above-mentioned switching center.
Switching center receives and successfully indicates 200(OK) send ACK message to callee side sip proxy server after signaling and confirm.So far, set up radio communication between called, switching center and connect, start session communication.
Embodiment 3
As shown in Figure 6, for Calling Side sip proxy server to the R-R Signalling exchange flow process during failure of wireless communication system application Radio Resource, make an explanation.In this Signalling exchange flow process, be mainly concerned with, once in called party confirmed response, and the Radio Resource of the such as radio channel resource of callee side etc. has been applied for successfully, in the unsuccessful situation of Radio Resource application of Calling Side, the release of the Radio Resource of callee side and the release And Spread of Solute of caller.
INVITE transfers to Calling Side sip proxy server by wireless communication system, Calling Side sip proxy server sends 100(Trying to caller) signaling shows that Calling Side sip proxy server processes, INVITE signaling is forwarded to switching center by sip proxy server simultaneously.Switching center receives INVITE signaling and processes relevant field, sends successfully indicate 200(OK after confirmation answering call to sip proxy server) signaling.
The 200(OK that Calling Side sip proxy server is receiving switching center and returns) after message, send ACK signaling to switching center and confirm, Calling Side sip proxy server is to Radio Resource needed for this session of wireless communication system application simultaneously.
If during to wireless communication system application Radio Resource, because of channel busy, resource anxiety, system mistake ... cause applying for unsuccessfully, namely wireless communication system sends Radio Resource application failed message to Calling Side sip proxy server.Calling Side sip proxy server after receiving that message, namely sends session release signaling respectively to caller and switching center, terminates this session.
Described session release signaling can be Bye signaling.
Claims (8)
1. realize a method for wireless communication system Radio Resource application based on Session Initiation Protocol, it is characterized in that, comprise the steps:
(1) first sip proxy server receives the session invitation signaling initiated by caller, and therefrom extracts the call parameter of wireless communication resources application;
(2) described first sip proxy server sends just in processing signaling to caller, described session invitation signaling is forwarded to switching center simultaneously;
(3) described switching center processes described session invitation signaling:
Described session invitation signaling is transmitted to the second sip proxy server by described switching center;
Session invitation signaling described in described second sip proxy server process, and return indication signaling to switching center; Described indication signaling comprises successfully indication signaling and release indication signaling:
Described second sip proxy server extracts the call parameter of wireless communication resources application from session invitation signaling, described session invitation signaling is transmitted to called and after called party confirmed answering call, described second sip proxy server is to wireless communication system application Radio Resource simultaneously;
After Radio Resource application success, described second sip proxy server returns successfully indication signaling to switching center;
In called reject response calling or Radio Resource application failure, described second sip proxy server returns release indication signaling to switching center;
Described switching center sends indication signaling to described first sip proxy server;
(4) described first sip proxy server sets up session action after receiving described indication signaling.
2. the method for claim 1, is characterized in that: the call parameter of the described extraction wireless communication resources application in described step (1) comprises bandwidth information, call preference level, service priority or the media type information extracted in session invitation signaling.
3. the method as described in as arbitrary in claim 1-2, is characterized in that, described in described step (4) sets up session action, comprises following flow process:
Described first sip proxy server according to received indication signaling to Radio Resource needed for this session of wireless communication system application or discharge this session.
4. method as claimed in claim 3, is characterized in that, described indication signaling comprises successfully indication signaling and release indication signaling, if successful indication signaling, then to Radio Resource needed for this session of wireless communication system application; If release indication signaling, then forward to caller and send release indication signaling and discharge this session.
5. the method as described in any one of claim 1-2, is characterized in that,
Described first sip proxy server is after Radio Resource needed for wireless communication system application, wireless communication system returns Radio Resource application success/failed message to described first sip proxy server, described first sip proxy server namely to caller send successfully/discharge indication signaling;
If what described first sip proxy server sent is release indication signaling, described release indication signaling is also addressed to described switching center simultaneously.
6. the method as described in any one of claim 1-2, wherein said session invitation signaling is INVITE signaling, and described successful indication signaling is 200 (OK) signaling.
7. the method as described in any one of claim 1-2, wherein said release indication signaling is Bye signaling.
8. the method as described in any one of claim 1-2, wherein said is being just 100 (Trying) signaling in processing signaling.
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| CN1855961A (en) * | 2005-04-21 | 2006-11-01 | 华为技术有限公司 | Method for realizing echo in communication system |
| CN102594804A (en) * | 2012-01-19 | 2012-07-18 | 中兴通讯股份有限公司 | Method and system for playing by using narrow-band equipment in broadband service |
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| US20090013078A1 (en) * | 2007-07-03 | 2009-01-08 | 4Dk Technologies, Inc. | Optimized Signaling Protocol, Including Session Initiation Protocol (SIP), in a Communications Environment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1855961A (en) * | 2005-04-21 | 2006-11-01 | 华为技术有限公司 | Method for realizing echo in communication system |
| CN102594804A (en) * | 2012-01-19 | 2012-07-18 | 中兴通讯股份有限公司 | Method and system for playing by using narrow-band equipment in broadband service |
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