CN103200650A - Method for achieving resource application of wireless communication system based on SIP protocol - Google Patents
Method for achieving resource application of wireless communication system based on SIP protocol Download PDFInfo
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- CN103200650A CN103200650A CN2013100936958A CN201310093695A CN103200650A CN 103200650 A CN103200650 A CN 103200650A CN 2013100936958 A CN2013100936958 A CN 2013100936958A CN 201310093695 A CN201310093695 A CN 201310093695A CN 103200650 A CN103200650 A CN 103200650A
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Abstract
The invention provides a method for achieving wireless resource application of a wireless communication system based on an SIP protocol. The method includes the following steps: (1) a first SIP proxy server receiving a conversation request signaling which is launched by a calling party, and extracting necessary parameters of the wireless communication resource application; (2) the first SIP proxy server sending the signaling under processing to the calling party, and meanwhile forwarding the conversation invitation signaling to a switching center; (3) the switching center processing the conversation invitation signaling, and sending an instruction signaling to the first SIP proxy server; and (4) the first SIP proxy server building conversation action after receiving the instruction signaling. Invalid occupancy of local wireless communication channel resources can be effectively avoided, and communication capacity of the system is improved.
Description
Technical field
The present invention relates to radio communication, particularly, relate to the method that a kind of dialogue-based initiation protocol (SIP) is realized the wireless communication system resource bid.
Background technology
SIP(Session Initiation Protocol, be Session initiation Protocol) be a kind of application layer protocol of in IP network, setting up, revising and stop Multimedia session, it is that internet engineering task group (IETF) is in a part of constantly carrying out standardized multi-media protocol system.SIP be described to generate, revise and terminate session between one or more participants.These sessions comprise the Internet multimedia conferencing, Internet or any IP network call and multimedia issue, and the member in the session can communicate by letter by the network of multicast or clean culture contact.
Session Initiation Protocol is indifferent to bearer network, can in the multiple communication network that comprises ATM (asynchronous transfer mode), work, can also run on the various transport layer protocols that comprise TCP (transmission control protocol), UDP (User Datagram Protoco (UDP)), SCTP (SCTP).Sip user is by being similar to the URL sign of e-mail address, for example: sip:myname@mycompany.com, in this way can be with different terminal and a communication mode of unified name identification, for using, network service and user provide sufficient flexibility.
Distinguish by logic function, the SIP system is made up of 4 kinds of functional entitys: user agent, acting server, Redirect Server and registrar.
User agent (User Agent) is divided into two parts: User Agent Client (User Agent Client), be responsible for making a call; Subscriber proxy server (User Agent Server) is responsible for call accepted and is made response.Both form the user agent and are present in the user terminal.
Acting server (Proxy Server) is responsible for receiving the request that the user agent sends, and according to network strategy corresponding server is issued in request, and according to replying of receiving the user is made response.
Redirect Server (Redirect Server) is used for when needed that the user is new position and returns to calling party, and calling party can be called out again according to the reposition that obtains.
Registrar (Registrar) is used for the registration request of reception and process user end, finishes the registration of station address.
Utilizing SIP to set up in the process of session, adopting the mode of Request-Response, i.e. the response of client to the request of server and server to client, comprising following several frequently seen signaling mode:
1、INVITE
The INVITE request is used for requiring user or service to participate in a session.Medium type, the medium type that sends and some parameters thereof that can receive as caller can be described by the session of invite participation the callee in the message body of INVITE request.Which kind of medium success response to the INVITE request must the explanation callee be ready to receive in the message body of response, the medium that the callee sends perhaps are described.Server can automatically be invited with 200 (OK) response.
2、ACK
It has received the final response that INVITE is asked for the user end to server confirmation in the ACK request, ACK and INVITE request use together.Confirmation to the final response of 2xx is sent by the client user agency, and the confirmation of other final response is sent by first agency who receives response or first client user agency.
3、BYE
User Agent Client shows that to server it thinks call release with BYE request.Can be sent also and can be sent by the callee by the calling party, a side of calling must send the BYE request before discharging (hanging up) calling, receives that this side of BYE request must stop to send Media Stream to a side who sends the BYE request.
Response message is represented answer that request is made with the conditional code (Status Code) of three integers and reason phrase (Reason Phrase), conditional code is used for the machine recognition operation, the reason phrase is that the simple text of conditional code is described, and is used for the manual identified operation.
Calling in the SIP/IP system is to invite the three-way handshake of request, success response and ACK affirmation request to realize that namely when the calling subscriber agency will make a call, it constructed an INVITE, and sends to the callee by INVITE.The callee receives and invites the back to determine to accept this calling, with regard to success response of loopback (conditional code is 200).After the calling party receives success response, send the ACK request to the other side.After the callee received the ACK request, access success was set up.
The termination of calling out realizes by the BYE request message.When the either party who participates in calling out wanted end call, it just constructed a BYE request message, and sends to the other side.After the other side receives the BYE request, discharge and call out relevant resource therewith, success response of loopback, expression is called out and is stopped.
In the prior art, inviting by the wireless communication system initiation session as the calling party and realize that session is set up when sip terminal will be through the R(Request of four-stage)-R(Response) process:
Phase I: terminal is sent the INVITE signaling through the application of Calling Side sip proxy server to the local radio communication system resource;
Second stage, the Calling Side sip proxy server is transmitted the INVITE signaling to switching center to switching center;
Phase III, the INVITE signaling is passed on to the callee side sip proxy server by switching center;
The quadravalence section, the callee side sip proxy server is to the application of local radio communication system resource.
In first and second stage, i.e. R-R reciprocal process 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 signaling sent of caller transfers to the Calling Side sip proxy server, and the Calling Side sip proxy server extracts associated session parameter informations such as caller priority, service priority, medium type, as the call parameter of wireless communication resources application;
2, the Calling Side sip proxy server sends 100(Trying to caller) signaled handles, simultaneously according to the associated session parameter in the INVITE signaling to the required Radio Resource of this session of wireless communication system application;
3, if the Calling Side sip proxy server is received the Radio Resource application success message that wireless communication system returns, then transmit caller INVITE signaling to switching center; If the Calling Side sip proxy server is received Radio Resource application failed message, then send the Bye signaling to caller and discharge this session;
4, switching center receives that the INVITE signaling handles relevant field, sends to the Calling Side sip proxy server after confirming answering call and successfully indicates 200(OK) signaling; If this session is refused by switching center, then send the Bye signaling to the Calling Side sip proxy server and discharge this session and transmit the Bye signaling to caller;
5, the Calling Side sip proxy server is received the 200(OK that switching center returns) after the signaling, send the ACK signaling to switching center and confirm, and send to caller successfully indicate 200(OK) signaling;
6, caller is received and is successfully indicated 200(OK) send ACK to the Calling Side sip proxy server after the signaling and confirm at heart, set up radio communication between caller, the switching center and connect, the communication of beginning wireless session.
In third and fourth stage, i.e. switching center and callee side sip proxy server and called 's R-R reciprocal process, its concrete signaling process as shown in Figure 2:
1, switching center transfers to the callee side sip proxy server with the INVITE signaling, and the callee side sip proxy server extracts associated session parameter informations such as caller priority, service priority, medium type, as the call parameter of wireless communication resources application;
2, the callee side sip proxy server sends 100(Trying to switching center) signaled handles, and is forwarded to the INVITE signaling called;
3, the called INVITE(of receiving signaling) and handle relevant field, after confirming answering call, send to the callee side sip proxy server successfully indicate 200(OK) signaling;
4, the callee side sip proxy server is received the called 200(OK that returns) after the signaling, confirm to called transmission ACK signaling that the callee side sip proxy server is to the required Radio Resource of this session of local radio communication system application simultaneously;
5, if the callee side sip proxy server is received the Radio Resource application success message that wireless communication system returns, then send to switching center and successfully indicate 200(OK) signaling; If the callee side sip proxy server is received Radio Resource application failed message, then send release Bye signaling to called and switching center respectively, finish this session;
6, switching center receives and successfully indicates 200(OK) send ACK message to the callee side sip proxy server after the message and confirm, set up radio communication between called, the switching center and connect beginning 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, this conversation end of being initiated by the calling party then, this session discharges, and waits for and initiates next session.
In this process, be example with Calling Side shown in Figure 3, R-R Signalling exchange situation in this process is described.
1, caller transfers to the Calling Side sip proxy server with the INVITE signaling, and the Calling Side sip proxy server extracts associated session parameter informations such as caller priority, service priority, medium type, as the call parameter of wireless communication resources application;
2, the Calling Side sip proxy server sends 100(Trying to caller) signaled Calling Side sip proxy server handling, and according to the relevant parameter in the INVITE signaling to the required Radio Resource of this session of wireless communication system application;
3, the Calling Side sip proxy server is received the Radio Resource application failed message that wireless communication system returns, and the Calling Side sip proxy server sends the Bye signaling to caller and discharges this session.
In the above-mentioned process of setting up session based on SIP, at first be to local radio communication system request channel resource by the Calling Side sip proxy server, after local channel resource bid success, the side is forwarded to switching center with the INVITE signaling, arrives the callee side sip proxy server then
Mode is set up in this session, existing the huge waste to local wireless communication channel---the 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 initiating this session, but session this moment is not set up successfully as yet, is also waiting for callee side sip proxy server and called feedback.
If the step 3 in above-mentioned third and fourth stage, called unconfirmed replying, be that called the transmission to the callee side sip proxy server successfully indicated 200(OK) signaling, or step 4, the callee side sip proxy server is to the failure of the required Radio Resource of this session of local radio communication system application, and Calling Side occupied but channel resource that do not set up session as yet will have to discharge again.
In numerous and jumbled now wireless communication system, radio channel resource is very nervous and is in busy time division multiplexing (TDMA) state that especially in some hot spot regions, radio channel resource has suitable scarcity.In case any point in the communication link, or caller and sip proxy server, or sip proxy server and switching center Signalling exchange take place unusual, will cause the invalid application of Radio Resource or Radio Resource to discharge, especially the Signalling exchange of callee side takes place directly to cause the channel ineffective occupation of Calling Side local radio communication system, or even can't discharge unusually, thereby make wireless resource utility efficiency low, influence systematic function.
Summary of the invention
For addressing the above problem, the present invention proposes a kind of new method based on the resource bid of Session Initiation Protocol realization wireless communication system, this method has guaranteed only finish caller and switching center's Signalling exchange, the application way of applying for radio channel resource again after the Signalling exchange success, thereby simplified the Signalling exchange flow process, to greatest extent avoided setting up based on the session of SIP at present in problem, the problem includes: the problem of wireless communication resources ineffective occupation, effectively promoted communication capacity and the performance of wireless communication system.
The present invention program finishes caller earlier and apply for Radio Resource again to called signaling call flow, and therefore in the signalling interactive process of calling and called, the required Radio Resource of this session still can be used for other communication traffic.Treat after the Signalling exchange success of calling and called again by first sip proxy server to the required Radio Resource of this session of wireless telecommunication system application, reduced the time that session takies Radio Resource so to greatest extent, the raising wireless resource utility efficiency.
Its concrete solution is as follows:
A kind of method based on the application of Session Initiation Protocol realization wireless communication system Radio Resource comprises 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, simultaneously described session invitation signaling is forwarded to switching center;
(3) described switching center handles described session invitation signaling, and sends indication signaling to described first sip proxy server;
(4) described first sip proxy server is set up the session action after receiving described indication signaling.
According to the present invention, the call parameter of the described extraction wireless communication resources application in the described step (1) comprises bandwidth information, caller priority, service priority, the media type information of extracting in the session demand signalling.
According to the present invention, the described switching center in the described step (3) handles described session invitation signaling, comprises following flow process:
Described switching center is transmitted to second sip proxy server with described session invitation signaling, and described second sip proxy server is handled described session invitation signaling, and returns described indication signaling to switching center.
According to the present invention, described indication signaling comprises successfully indication signaling and discharges indication signaling, it is characterized in that:
The call parameter of extraction wireless communication resources application from the session invitation signaling is transmitted to described session invitation signaling called simultaneously and behind called party confirmed answering call, described second sip proxy server is to wireless communication system application Radio Resource;
After Radio Resource application success, described second sip proxy server returns success indication signaling to switching center;
Call out or Radio Resource application failure called rejecing response, described second sip proxy server returns the release indication signaling to switching center.
According to the present invention, described in the described step (4) set up the session action, comprises following flow process:
1, described first sip proxy server is receiving that described successful indication signaling namely sends the affirmation signaling to described switching center, and sip proxy server is to the required Radio Resource of this session of wireless communication system application simultaneously;
2, described first sip proxy server is receiving that described release indication signaling namely transmits described release indication signaling to caller, and sip proxy server discharges this session simultaneously.
According to the present invention, described in the described step (4) set up the session action, further comprises:
Described first sip proxy server is received the Radio Resource application success/failed message that wireless communication system returns, and namely sends successfully/discharge indication signaling to caller.
Described release indication signaling also is addressed to switching center.
Described session invitation signaling is the INVITE signaling.
According to the present invention, described successful indication signaling is 200(OK) signaling; Described release indication signaling is the Bye signaling.
According to the present invention, described is being 100(Trying in processing signaling just).
Of the present inventionly realize the method for wireless communication system resource bid based on Session Initiation Protocol, can effectively avoid the ineffective occupation of local wireless communication channel resource, improve the message capacity of system.
Description of drawings
Fig. 1 is the Signalling exchange R-R flow process of caller Calling Side when making a call in the prior art
Fig. 2 is the Signalling exchange R-R flow process of called callee side when replying in the prior art;
Fig. 3 is the Signalling exchange R-R flow process when the Radio Resource application is failed in the 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 called callee side when replying proposed by the invention;
Signalling exchange R-R flow process when Fig. 6 is Radio Resource application proposed by the invention failure.
Embodiment
Below in conjunction with accompanying drawing, preferred implementation of the present invention is elaborated.But those skilled in the art understand, and the specific embodiment of the present invention only is not construed as limiting the scope of the present invention in order to explanation.Any the present invention is made amendment or is equal to replacement, and do not break away from modification or local replacement of the spirit and scope of the present invention, all should be encompassed within protection scope of the present invention.
Embodiment 1
At first, caller as shown in Figure 4 when making a call, the R-R Signalling exchange flow process of caller between local radio communication system and Calling Side sip proxy server and information centre.
Caller transfers to the Calling Side sip proxy server with the order of session invitation letter by wireless communication system, the Calling Side sip proxy server extracts information such as caller priority, service priority, required channel, medium type, as the call parameter of wireless communication resources application.Wherein, described session invitation signaling can be the INVITE signaling.
Caller can be any communication terminal in the access to wireless communication system as a kind of user terminal, such as suchlike terminal facility such as mobile phone, palmtop PC, PC, notebook.
And wireless communication system also can be the wireless communication system of any type, can be the 2G mobile communication system, such as digital mobile communication system such as GSM, CDMA; Also can be 3G mobile communication system such as TD-SCDMA, WCDMA, CDMA2000, WiMAX; Can also be the Wi-Fi network of local or NGN, LTE, 4G ... wireless communication network system.
The Calling Side sip proxy server namely sends just in processing signaling to caller by wireless communication system after receiving the session invitation signaling, such as 100(Trying) signaling, show that to caller the Calling Side sip proxy server handling its reply that sends and inviting.
Send just in processing signaling to caller at the Calling Side sip proxy server, the order of session invitation letter is forwarded to switching center, after switching center receives that the Calling Side sip proxy server is transmitted next session invitation signaling, namely its entrained relevant field is handled, confirming to send successful indication signaling to the Calling Side sip proxy server behind the answering call, agreeing to set up session with caller to show it.
Wherein, described successful indication signaling can be 200(OK) signaling.
After the Calling Side sip proxy server is received the successful indication signaling that switching center returns, namely send to switching center and confirm signaling, receive to show the Calling Side sip proxy server, and will make preparation for the foundation of session.The Calling Side sip proxy server is to the required Radio Resource of this session of wireless communication system application immediately.
Wherein, the Calling Side sip proxy server can be the ACK signaling to the affirmation signaling that switching center sends.
The Calling Side sip proxy server namely sends successful indication signaling by wireless communication system to caller at the Radio Resource application success message of receiving that wireless communication system returns.Caller is namely confirmed to Calling Side sip proxy server transmission ACK message by wireless communication system after receiving successfully indication signaling.So far, set up radio communication between caller, the switching center and connect, beginning session communication.
Embodiment 2
In the process of embodiment 1, switching center handles the relevant field in the session invitation signaling and confirms answering call, relate to switching center and called between Signalling exchange, as shown in Figure 5, the Signalling exchange R-R flow process of called callee side when replying.
Switching center transfers to the callee side sip proxy server with the INVITE signaling, the callee side sip proxy server extracts information such as caller priority, service priority, required channel, medium type, the call parameter when carrying out the wireless communication resources application as the callee side sip proxy server to wireless communication system.
The callee side sip proxy server sends 100(Trying to switching center) signaling shows that the callee side sip proxy server handling calling, the callee side sip proxy server transfers to the INVITE signaling called by wireless communication system.
The called INVITE of receiving signaling is also handled relevant field, sends to the callee side sip proxy server by wireless communication system after confirming answering call and successfully indicates 200(OK) signaling.
The callee side sip proxy server is received the called 200(OK that returns) after the signaling, by wireless communication system to called transmission ACK signaling to carry out message authentication, the callee side sip proxy server is to the required Radio Resource of this session of wireless communication system application immediately.
The callee side sip proxy server is received 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) signaling is the successful indication signaling that above-mentioned switching center returns to the Calling Side sip proxy server.
Switching center receives and successfully indicates 200(OK) send ACK message to the callee side sip proxy server after the signaling and confirm.So far, set up radio communication between called, the switching center and connect, beginning session communication.
Embodiment 3
As shown in Figure 6, the R-R Signalling exchange flow process when failing to wireless communication system application Radio Resource at the Calling Side sip proxy server is made an explanation.In this Signalling exchange flow process, be mainly concerned with, in case reply called party confirmed, and the Radio Resource such as radio channel resource etc. of callee side has been applied for success, under the unsuccessful situation of Radio Resource application of Calling Side, the release problem of the release of the Radio Resource of callee side and caller.
INVITE transfers to the Calling Side sip proxy server by wireless communication system, the Calling Side sip proxy server sends 100(Trying to caller) signaling shows that the Calling Side sip proxy server handles, sip proxy server is forwarded to switching center with the INVITE signaling simultaneously.Switching center receives the INVITE signaling and handles relevant field, sends to sip proxy server after confirming answering call and successfully indicates 200(OK) signaling.
The Calling Side sip proxy server is at the 200(OK that receives that switching center returns) after the message, send the ACK signaling to switching center and confirm that the Calling Side sip proxy server is to the required Radio Resource of 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 the application failure, wireless communication system namely sends Radio Resource application failed message to the Calling Side sip proxy server.The Calling Side sip proxy server namely sends the session release signaling to caller and switching center respectively after receiving this message, finish this session.
Described session release signaling can be the Bye signaling.
Claims (10)
1. the method based on the application of Session Initiation Protocol realization wireless communication system Radio Resource is characterized in that, comprises 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, simultaneously described session invitation signaling is forwarded to switching center;
(3) described switching center handles described session invitation signaling, and sends indication signaling to described first sip proxy server;
(4) described first sip proxy server is set up the 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 the described step (1) comprises bandwidth information, caller priority, service priority or the media type information of extracting in the session demand signalling.
3. as each described method of claim 1-2, it is characterized in that the described switching center in the described step (3) handles described session invitation signaling, also comprises following flow process:
Described switching center is transmitted to second sip proxy server with described session invitation signaling, and described second sip proxy server is handled described session invitation signaling, and returns described indication signaling to switching center.
4. method as claimed in claim 3, it is characterized in that described second sip proxy server is handled described session invitation signaling, and return described indication signaling to switching center, described indication signaling comprises successfully indication signaling and discharges indication signaling, it is characterized in that:
The call parameter of extraction wireless communication resources application from the session invitation signaling is transmitted to described session invitation signaling called simultaneously and behind called party confirmed answering call, described second sip proxy server is to wireless communication system application Radio Resource;
After Radio Resource application success, described second sip proxy server returns success indication signaling to switching center;
Call out or Radio Resource application failure called rejecing response, described second sip proxy server returns the release indication signaling to switching center.
5. as the arbitrary described method of claim 1-4, it is characterized in that described in the described step (4) set up the session action, comprises following flow process:
Described first sip proxy server according to the indication signaling of receiving to the required Radio Resource of this session of wireless communication system application or discharge this session.
6. method as claimed in claim 5 is characterized in that, described indication signaling comprises successfully indication signaling and discharges indication signaling, if successful indication signaling, then to the required Radio Resource of this session of wireless communication system application; If the release indication signaling is then transmitted to caller and is sent the release indication signaling and discharge this session.
7. as each described method of claim 1-6, it is characterized in that,
Described first sip proxy server is after the described required unlimited resources of wireless communication system application, wireless communication system returns Radio Resource application success/failed message to described first sip proxy server, and described first sip proxy server namely sends successfully/discharge indication signaling to caller;
If what described first sip proxy server sent is to discharge indication signaling, described release indication signaling also is addressed to described switching center simultaneously.
8. as the arbitrary described method of claim 1-7, wherein said session invitation signaling is the INVITE signaling.Preferably, described successful indication signaling is 200(OK) signaling.
9. as the arbitrary described method of claim 1-8, wherein said release indication signaling is the Bye signaling.
10. as the arbitrary described method of claim 1-9, wherein said is being 100(Trying in processing signaling just) signaling.
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| Publication number | Priority date | Publication date | Assignee | Title |
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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 |
| US20090013078A1 (en) * | 2007-07-03 | 2009-01-08 | 4Dk Technologies, Inc. | Optimized Signaling Protocol, Including Session Initiation Protocol (SIP), in a Communications Environment |
| 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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| 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 |
| US20090013078A1 (en) * | 2007-07-03 | 2009-01-08 | 4Dk Technologies, Inc. | Optimized Signaling Protocol, Including Session Initiation Protocol (SIP), in a Communications Environment |
| 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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