CN100558099C - A kind of method that realizes that the session initiation protocol application server multi-service is handled - Google Patents
A kind of method that realizes that the session initiation protocol application server multi-service is handled Download PDFInfo
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Abstract
The invention discloses a kind of method that realizes that the multi-service of Session Initiation Protocol application server is handled, method of the present invention is that Session Initiation Protocol stack, the professional trigger layer of SIP and a plurality of service operation container are set on a sip application server, the Session Initiation Protocol stack receives the SIP business request information, the location corresponding service is moved container and is forwarded to corresponding service operation container in the professional trigger layer of SIP, handles corresponding SIP business by the service operation container.Use method of the present invention and can on single sip application server, support the SIP business of number of different types, not only guaranteed the rich of SIP type of service, and saved cost greatly, be convenient to sip application server simultaneously all types of SIP business are added up and managed.In addition, owing to can on sip application server, increasing and deleting the service operation container, make sip application server have higher flexibility and extensibility.
Description
Technical field
(Session Initiation Protocol, SIP) application technology particularly relate to a kind of method that realizes that the session initiation protocol application server multi-service is handled to the present invention relates to Session initiation Protocol.
Background technology
Session initiation Protocol is a kind of Internet protocol (InternetProtocol, IP) call signaling protocol that is proposed by Internet engineering group (IETF).Its initial purpose is to control for the signaling that solves in the IP network, and the communication of same soft switch (Soft Switch), thereby constitutes follow-on value-added service platform, provides better value-added service to industries such as telecommunications, bank, finance.
SIP is the part of ietf standard process, and it is to set up on the basis such as simple message transfer protocol (SMTP) (SMTP) and HTTP agreements such as (HTTP).SIP is described to generating, revise and terminate session between one or more participants, and these sessions comprise internet multimedia meeting, internet (or any IP network) call and multimedia issue.SIP also supports other the novel business under the IP network: as instant message, voice conferencing and unified message etc.In addition, SIP has become the call control protocol of third generation communication service.
Therefore, because SIP has simply, is easy to expand, is convenient to plurality of advantages such as realization, it progressively becomes the important protocol in next generation network (NGN) and third generation network (3G) multimedia subsystem domain, and client software and intelligent multimedia terminal that increasing support SIP occurred, and server and the Softswitch realized with Session Initiation Protocol.
The SIP business is the application that realizes according to Session Initiation Protocol, for example IP phone (Voice over InternetProtocol, VoIP) professional, attend that (Presence) is professional, instant message (IM) business, or the like.
Sip application server (SIP Application Server, SIP AS) be control and carry out be stored thereon, based on the functional entity of the business of Session Initiation Protocol, be to use the most important parts of SIP as the communication network of Multimedia session control protocol.The main application of sip application server provides and controls the fused business (Converged Service) based on Session Initiation Protocol, the business of promptly integrated voice, video, WEB, message, data capability.Because no matter therefore the multiple services characteristic of this support of SIP itself, be in NGN or 3G network, an important feature of sip application server just provides multi-service.
Fig. 1 shows the position of sip application server in the SIP network, and as can be seen from Figure 1, the SIP client links to each other with sip application server by the SIP network.
The SIP client is client software or an equipment of supporting that SIP uses, for example, and SIP multimedia personal computer (PC) software terminal, SIP mobile phone, SIP multimedia WEB client software, SIP PDA(Personal Digital Assistant) client software etc.
The SIP network comprises multiple network equipment, for example, and at the 5th edition (The3 of third generation partner program
RdGeneration Partnership Project Release 5,3GPP R5) under the service environment, the network equipment that typical SIP network may comprise has acting server (Proxy Server), Redirect Server (Redirect Server), registration/location-server (Registrar/Location Server) and call session control controller (SCSCF), and the SIP request of sending from the SIP client sends to sip application server by the above network equipment.
In the prior art, a sip application server can only be handled one type business usually, handle polytype business if desired, then need to dispose a plurality of sip application servers, an IP port is arranged on each sip application server, the corresponding process of each IP port, as shown in Figure 1, sip application server 1 is handled CGI(Common gateway interface) (Common Gate Interface, CGI) the SIP business of type, sip application server 2 is handled call processing language, and (sip application server 3 is handled the SIP business of session initiation protocol service device end small routine (SIP Servlet) type for Call Process Language, CPL) the SIP business of type.When certain application server port is received sip message, just trigger the business on this application server port.When needs increased new SIP type of service, just needing increased a new port, promptly needs to increase a new sip application server.So sip application server is individual processing, does not disturb mutually the processing mode of polytype business, every type SIP business is handled by sip application server separately.
There is certain defective in the method for prior art: at first, for each type of service, need independently a process and an IP port independently, promptly need an independently sip application server, so the cost of system is higher; Secondly, each type of service is separate, and the administration portal that neither one is unified is so be difficult to dissimilar business is carried out unified management; The three, one sip application server only supported single type of service, and can not support the multiple business type, so sip application server efficient is lower.
Summary of the invention
Main purpose of the present invention is to provide a kind of method that realizes that the sip application server multi-service is handled, and supports polytype SIP business on single sip application server simultaneously.
The objective of the invention is to be achieved through the following technical solutions:
A kind of method that realizes that the sip application server multi-service is handled comprises the steps: at least
A, on sip application server, be provided for receiving and send sip message and the Session Initiation Protocol stack that sip message is resolved and encapsulated in advance, be used for handling respectively one or more SIP types of service one or more service operation containers, be used to locate the SIP type of service corresponding service operation container of being asked and transmit the professional trigger layer of SIP of SIP business request information to described service operation container with the SIP business request information, and set in advance and be used for the record traffic database of information;
B, when the Session Initiation Protocol stack receive that the SIP client sends comprise the SIP business request information of unified service identification the time, from this SIP business request information, parse unified service identification;
The service deployment table that is used to identify corresponding relation between SIP business and the service operation Container Type that the unified service identification inquiry that the professional trigger layer of C, SIP obtains according to step B is set up in database in advance, judge the business record that whether has the SIP business that the SIP business request information asked in the described service deployment table, if, execution in step D then; Otherwise finish;
The professional trigger layer of D, SIP obtains the business information of the SIP business that the SIP business request information asked from database, and, then SIP business request information and business information are sent to corresponding service operation container according to the Hash table location corresponding service operation container of in the professional trigger layer of SIP, setting up in advance, be used to store corresponding relation between one or more groups service operation Container Type and the information of container;
E, service operation container carry out corresponding SIP service scenario according to SIP business request information that receives and business information, and will carry out the sip message that generates in the scenario process and be sent to the Session Initiation Protocol stack.
Described business information comprises Business Name, script type and the script name of SIP business at least, and described unified service identification is the Business Name of SIP business.
Described method further comprises: the described location of step D corresponding service operation container is realized by the described Hash table of inquiry.
Described information of container comprises the memory address of service operation container at least.
Described method further comprises storage user's service subscription information in described database in advance, further comprise before the described step D: the professional trigger layer of SIP judges by inquiring about described customer service purchase order information whether the user has ordered the SIP business that the SIP business request information is asked, if, execution in step D then; Otherwise finish.
Described method further comprises the steps:
What the script file of the Added Business that debugging is finished left the sip application server appointment in is used to deposit under the catalogue of script file of the SIP business that this sip application server supports;
In database, increase the business record of this Added Business.
Described method further comprises: judge whether comprise on the sip application server and Added Business corresponding service operation container, if having, then carry out the described step of depositing the Added Business script file and increasing the business record of Added Business; Otherwise finish.
Described method further comprises: the described business record that increases Added Business in database is realized by the business record item that increases Added Business in described service deployment table.
Described method comprises that further deletion waits to delete professional business record from database.
Described method further comprises: carrying out after described deletion waits to delete the step of professional business record, from the sip application server appointment be used for deposit the SIP business that this sip application server supports script file the catalogue deletion this wait to delete professional script file.
The described deletion from database waits to delete professional business record by delete this business record item of waiting the business of deleting realization in described service deployment table.
Described method further comprises:
Be used to deposit under the catalogue of service operation container software kit with what service operation container software kit left the sip application server appointment in;
In the startup configuration file that comprises all service operation containers startup descriptors of sip application server, increase the startup descriptor of Added Business operation container.
Described method further comprises: judge whether sip application server moves, if, then after the operation that stops sip application server, carry out the described step of depositing service operation container software kit and increasing Added Business operation container startup descriptor, start sip application server then; Otherwise directly carry out the described step of depositing service operation container software kit and increasing Added Business operation container startup descriptor, start sip application server then.
Described method further comprises: the startup descriptor that deletion waits to delete the service operation container from the startup configuration file that comprises all service operation containers startup descriptors of sip application server.
Described method further comprises: wait to delete after the service operation container starts the step of descriptor carrying out described deletion, wait to delete service operation container software kit from the catalogue deletion that is used for depositing service operation container software kit of sip application server appointment.
Described method further comprises: judge whether sip application server moves, if, then after the operation that stops sip application server, carry out described deletion and wait to delete the step that the service operation container starts descriptor, start sip application server then; Wait to delete the step that the service operation container starts descriptor otherwise directly carry out described deletion, start sip application server then.
The startup descriptor of described service operation container comprises the title of service operation container, the catalogue at service operation container software kit place and the title of service operation container entrance file.
Described service operation container is the CGI(Common gateway interface) container that is used to carry out CGI(Common gateway interface) type SIP service scenario, be used to the sip server end small routine container carrying out the call processing language container of call processing language type SIP service scenario or be used to carry out sip server end small routine type SIP service scenario.
By above technical scheme as can be seen, method of the present invention is a plurality of service operation containers that Session Initiation Protocol stack, the professional trigger layer of SIP are set on a sip application server and are used for handling respectively a plurality of SIP types of service, the Session Initiation Protocol stack is sent to the professional trigger layer of SIP with this sip request message after receiving the SIP business request information, locate this SIP service request corresponding service operation container by the professional trigger layer of SIP, and this SIP service request is forwarded to described service operation container, the service operation container is handled corresponding SIP business.So, in the method for the invention, a sip application server can be handled polytype SIP business, and in the method for prior art, a sip application server only can be handled one type SIP business, a plurality of sip application servers must be set could handle polytype SIP business.Therefore, method of the present invention has guaranteed the rich of SIP type of service greatly reducing under the prerequisite that realizes cost.
And, in the method for the invention, all kinds SIP business all is positioned to corresponding service operation container and is forwarded to described service operation container on the professional trigger layer of the SIP of same sip application server, and in the method for prior art, dissimilar SIP business are handled by different sip application servers, separate between each sip application server, so method of the present invention is more conducive to sip application server dissimilar SIP business are added up and managed, for example, can be quickly and easily the number of services of all types of SIP business within the section be sometime analyzed comparison.In addition, method of the present invention can increase new service operation container to support other SIP type of service on a sip application server, also can delete the service operation container that has existed but no longer needed, so sip application server has higher flexibility and extensibility.
After using method of the present invention, can realize the processing of sip application server with lower cost to polytype SIP business, make sip application server add up and to manage dissimilar SIP business more quickly and easily simultaneously, and have higher flexibility and extensibility.
Description of drawings
Fig. 1 is the position view of sip application server in SIP uses.
Fig. 2 is for realize the schematic diagram of the logic entity that method of the present invention increases on sip application server.
Fig. 3 is the method according to this invention triggers the SIP business on sip application server a flow chart.
Fig. 4 is the flow chart of the method according to this invention newly-increased SIP business on sip application server.
Fig. 5 is the method according to this invention is deleted the SIP business on sip application server a flow chart.
Fig. 6 is the flow chart of the method according to this invention Added Business operation container on sip application server.
Fig. 7 is the method according to this invention is deleted the service operation container on sip application server a flow chart.
Embodiment
In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention is further described below in conjunction with the drawings and specific embodiments.
Fig. 2 is the method according to this invention and the schematic diagram of the logic entity that increases on sip application server.As can be seen from Figure 2, the logic entity that comprises in the sip application server of the present invention has Session Initiation Protocol stack, the professional trigger layer of SIP, service operation container and database.
The Session Initiation Protocol stack is used for receiving and sending sip message, when receiving and send sip message, finishes parsing or encapsulation to sip message.
The professional trigger layer of SIP is the most crucial part that realizes that the sip application server multi-service is handled, be used for judging whether to carry out corresponding SIP business according to user's the SIP business request information and the related data of database, if judge the corresponding SIP business of carrying out, then location and this business corresponding service operation container, and business request information is transmitted to this service operation container handles.In order to locate and the professional corresponding service operation container of being asked, in the professional trigger layer of SIP, a Hash table is set, be used to store the corresponding relation between many group service operation Container Types and the information of container, herein, information of container mainly refers to the memory address of service operation container.
The service operation container is also referred to as the service operation engine, is used to move concrete SIP business, and is responsible for the processing of this professional script file, all is the service operation container as CGI container, CPL container and the Servlet container of the top among Fig. 2.Each container is handled one type business, and for example, the CGI container is handled the business that CGI scripting is described, and promptly handles the business of CGI type; The CPL container is handled the business of CPL script describing, promptly handles the business of CPL type; The business of Servlet container treatment S IP Servlet script describing, the i.e. business of treatment S IP Servlet type.In addition, the service operation container also is responsible for carrying out the sip message that generates in the service scenario file process and is sent to the Session Initiation Protocol stack.
Database is used for record traffic information and customer service purchase order information, and this database not necessarily requires to be positioned on the sip application server, and it can be arranged in any position that sip application server can be visited.Certainly, for the consideration of factors such as efficient, safety, database preferably and sip application server be positioned on the same logical place.For the business that can make professional trigger layer identification user request belongs to any type, a service deployment table need be set in database, be used to identify the corresponding relation between SIP business and the service operation Container Type.
Table 1 is to adopt " Business Name " and " script type " relation to express the example of the service deployment table of corresponding relation between business and the Container Type.
| Sequence number | Business Name | Script name | Script type | Business description |
| 1 | tankGame@as.com | tankGame.exe | CGI | The tank game business |
| 2 | autoRoute@as.com | autoRoute.cpl | CPL | Automatic routing service |
| 3 | Presence@as.com | Presence.java | SIP Servlet | Attendance service |
| 4 | IM@as.com | IM.java | SIP Servlet | Instant messaging |
Table 1
The Business Name of each business that sip application server is supported, script name and script type all are listed in the table 1, can obtain every SIP professional corresponding script name and script type by question blank 1.Professional script name is a filename of describing this professional program code, and professional script type then is to carry out the title of the service operation container of this professional script.
Fig. 3 is the flow chart that triggers the SIP business according to of the present invention on sip application server, as can be seen from Figure 3, when the SIP client when sip application server sends sip request message, sip application server is carried out following steps:
Step 301, Session Initiation Protocol stack receive the SIP business request information that comprises unified service identification that the SIP client is sent, and parse the unified service identification that is comprised in this SIP business request information.In the method for the invention, increase unified service identification in the SIP business request information, be used to the whole flow process that runs through service deployment, upgrades, orders, uses and trigger.Preferably, unified service identification is arranged in the request header field of sip message, so that parsed by the Session Initiation Protocol stack more quickly.Unified service identification can be a Business Name, but is not limited only to this a kind of mode of Business Name, can also adopt other mode.In the present embodiment, adopt the Business Name of similar e-mail address as unified service identification, for example
ServiceName@as.com, wherein domain name as.com represents the professional residing server address of SIP, its essence is an IP address, and the serviceName sign is positioned at the title of a SIP business on this server, for example,
TankGame@as.comJust identified a tank game business on the as.com server.
The unified service identification Query Database that step 302, the professional trigger layer of SIP obtain according to step 301, i.e. the service deployment table of Query Database.
Step 303, judge whether there is this business record in the service deployment table, that is to say, whether have the record of this Business Name in the service deployment table,, then forward step 304 to if found the corresponding service record; Otherwise finish.
Step 304, judge by Query Database whether the user has ordered the business of being asked,, then forward step 305 to if ordered should business for the user; Otherwise finish.
Step 305, take out the script type in this record, the type of this script type identification service operation container, be used to store memory address that the Hash tables of organizing Container Types and information of container between corresponding relation obtain this Container Type pairing service operation container by inquiry more, then business information such as SIP business request information, unified service identification and script name sent in the corresponding service operation container.
Step 306, service operation container are carried out the script file of corresponding service according to business information such as the SIP business request information that receives, unified service identification and script names.
For one current on sip application server non-existent new business, need could when receiving service request from user, carry out this business increasing this business on the sip application server.Fig. 4 is the flow chart that increases the SIP business newly according to of the present invention on sip application server, and newly-increased SIP business comprises the steps:
Deposit the script file of the SIP business that all this sip application servers support in this service scenario catalogue.This service scenario catalogue can be positioned on this sip application server, also can be positioned on other physical location that this sip application server can visit.
Like this, when the user asks this business, carry out step as shown in Figure 3, this business request information is sent to corresponding business operation container carry out this business.
When on sip application server, existed professional of needs deletion, need to carry out deletion SIP operation flow.Fig. 5 is the flow chart according to deletion SIP business of the present invention, and deletion SIP business comprises the steps:
Corresponding service entry in the service deployment table of step 501, delete database.
Like this, this business is just deleted from sip application server, that is to say, sip application server will no longer have this professional ability of processing.
Method of the present invention can increase the service operation container neatly on single sip application server, Fig. 6 be according to of the present invention on sip application server the flow chart of Added Business operation container, as can be seen from the figure, Added Business operation container comprises the steps:
The startup configuration file of step 604, renewal sip application server increases the startup descriptor that Added Business moves container in starting configuration file.
The startup configuration file of sip application server is the file that when sip application server starts sip application server is configured, this startup configuration file comprises all startup descriptors with the service operation container that is activated, the startup descriptor of service operation container comprises the title of the inlet file of the catalogue at software kit place of title, service operation container of service operation container and service operation container, or the like.
Like this, after sip application server started, newly-increased service operation container had just existed on sip application server, so sip application server can be handled and the corresponding new one type SIP business of this Added Business operation container.
Fig. 7 is a flow chart of deleting the service operation container according to of the present invention on sip application server, and as can be seen from the figure, deletion service operation container comprises the steps:
The startup configuration file of step 703, renewal sip application server, the deletion startup descriptor corresponding in starting configuration file with service operation container to be deleted.
Like this, after sip application server starts, deleted service operation container will not be present on the sip application server, so sip application server will no longer be handled the SIP business corresponding with this deleted service operation container.
The method according to this invention adopts the Java platform technology to realize, whole system is at a Java Virtual Machine (Java Virtual Machine, JVM) go up operation, the various piece of this method realizes having only a Java process when operation as the internal module of whole system.
In concrete implementation process, can carry out suitable improvement, to adapt to the concrete needs of concrete condition to the method according to this invention.Therefore be appreciated that according to the specific embodiment of the present invention just to play an exemplary role, not in order to restriction protection scope of the present invention.
Claims (18)
1, a kind of method that realizes that the multi-service of Session Initiation Protocol application server is handled is characterized in that this method comprises the steps: at least
A, on sip application server, be provided for receiving and send sip message and the Session Initiation Protocol stack that sip message is resolved and encapsulated in advance, be used for handling respectively one or more SIP types of service one or more service operation containers, be used to locate the SIP type of service corresponding service operation container of being asked and transmit the professional trigger layer of SIP of SIP business request information to described service operation container with the SIP business request information, and set in advance and be used for the record traffic database of information;
B, when the Session Initiation Protocol stack receive that the SIP client sends comprise the SIP business request information of unified service identification the time, from this SIP business request information, parse unified service identification;
The service deployment table that is used to identify corresponding relation between SIP business and the service operation Container Type that the unified service identification inquiry that the professional trigger layer of C, SIP obtains according to step B is set up in database in advance, judge the business record that whether has the SIP business that the SIP business request information asked in the described service deployment table, if, execution in step D then; Otherwise finish;
The professional trigger layer of D, SIP obtains the business information of the SIP business that the SIP business request information asked from database, and, then SIP business request information and business information are sent to corresponding service operation container according to the Hash table location corresponding service operation container of in the professional trigger layer of SIP, setting up in advance, be used to store corresponding relation between one or more groups service operation Container Type and the information of container;
E, service operation container carry out corresponding SIP service scenario according to SIP business request information that receives and business information, and will carry out the sip message that generates in the scenario process and be sent to the Session Initiation Protocol stack.
2, the method for realization sip application server multi-service processing according to claim 1, it is characterized in that, described business information comprises Business Name, script type and the script name of SIP business at least, and described unified service identification is the Business Name of SIP business.
3, the method for realization sip application server multi-service processing according to claim 1 is characterized in that this method further comprises: the described location of step D corresponding service operation container is realized by the described Hash table of inquiry.
4, the method for realization sip application server multi-service processing according to claim 3 is characterized in that described information of container comprises the memory address of service operation container at least.
5, the method for realization sip application server multi-service processing according to claim 1, it is characterized in that, this method further comprises storage user's service subscription information in described database in advance, further comprise before the described step D: the professional trigger layer of SIP judges by inquiring about described customer service purchase order information whether the user has ordered the SIP business that the SIP business request information is asked, if, execution in step D then; Otherwise finish.
6, the method for realization sip application server multi-service processing according to claim 1 is characterized in that this method further comprises the steps:
What the script file of the Added Business that debugging is finished left the sip application server appointment in is used to deposit under the catalogue of script file of the SIP business that this sip application server supports;
In database, increase the business record of this Added Business.
7, the method for realization sip application server multi-service processing according to claim 6, it is characterized in that, this method further comprises: judge whether comprise on the sip application server and Added Business corresponding service operation container, if have, then carry out the described step of depositing the Added Business script file and increasing the business record of Added Business; Otherwise finish.
8, the method for realization sip application server multi-service processing according to claim 6, it is characterized in that this method further comprises: the described business record that increases Added Business in database is realized by the business record item that increases Added Business in described service deployment table.
9, the method for realization sip application server multi-service processing according to claim 1 is characterized in that, this method comprises that further deletion waits to delete professional business record from database.
10, the method for realization sip application server multi-service processing according to claim 9, it is characterized in that, this method further comprises: carrying out after described deletion waits to delete the step of professional business record, from the sip application server appointment be used for deposit the SIP business that this sip application server supports script file the catalogue deletion this wait to delete professional script file.
11, the method for realization sip application server multi-service processing according to claim 9, it is characterized in that this method further comprises: the described deletion from database waits to delete professional business record by delete this business record item of waiting the business of deleting realization in described service deployment table.
12, the method for realization sip application server multi-service processing according to claim 1 is characterized in that this method further comprises:
Be used to deposit under the catalogue of service operation container software kit with what service operation container software kit left the sip application server appointment in;
In the startup configuration file that comprises all service operation containers startup descriptors of sip application server, increase the startup descriptor of Added Business operation container.
13, the method for realization sip application server multi-service processing according to claim 12, it is characterized in that, this method further comprises: judge whether sip application server moves, if, then after the operation that stops sip application server, carry out the described step of depositing service operation container software kit and increasing Added Business operation container startup descriptor, start sip application server then; Otherwise directly carry out the described step of depositing service operation container software kit and increasing Added Business operation container startup descriptor, start sip application server then.
14, the method for realization sip application server multi-service processing according to claim 1, it is characterized in that this method further comprises: the startup descriptor that deletion waits to delete the service operation container from the startup configuration file that comprises all service operation containers startup descriptors of sip application server.
15, the method for realization sip application server multi-service processing according to claim 14, it is characterized in that, this method further comprises: wait to delete after the service operation container starts the step of descriptor carrying out described deletion, wait to delete service operation container software kit from the catalogue deletion that is used for depositing service operation container software kit of sip application server appointment.
16, the method for realization sip application server multi-service processing according to claim 14, it is characterized in that, this method further comprises: judge whether sip application server moves, if, then after the operation that stops sip application server, carry out described deletion and wait to delete the step that the service operation container starts descriptor, start sip application server then; Wait to delete the step that the service operation container starts descriptor otherwise directly carry out described deletion, start sip application server then.
17, the method for handling according to claim 12 or the multi-service of the described realization sip application server of claim 14, it is characterized in that the startup descriptor of described service operation container comprises the title of service operation container, the catalogue at service operation container software kit place and the title of service operation container entrance file.
18, the method for realization sip application server multi-service processing according to claim 1, it is characterized in that described service operation container is the CGI(Common gateway interface) container that is used to carry out CGI(Common gateway interface) type SIP service scenario, be used to the sip server end small routine container carrying out the call processing language container of call processing language type SIP service scenario or be used to carry out sip server end small routine type SIP service scenario.
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| EP1976217B1 (en) * | 2007-03-27 | 2019-10-09 | BlackBerry Limited | Methods and systems to allow multiple sip applications on a sip client enabling it to select specific applications and features on a sip server |
| CN101083617B (en) * | 2007-07-02 | 2010-07-14 | 华为技术有限公司 | Session initializtion protocol service routing method and system |
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| CN1662004A (en) | 2005-08-31 |
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