CN101790010A - Designated pick-up service realization method and communication system - Google Patents

Designated pick-up service realization method and communication system Download PDF

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Publication number
CN101790010A
CN101790010A CN201010105714A CN201010105714A CN101790010A CN 101790010 A CN101790010 A CN 101790010A CN 201010105714 A CN201010105714 A CN 201010105714A CN 201010105714 A CN201010105714 A CN 201010105714A CN 101790010 A CN101790010 A CN 101790010A
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designated
user
request
pick
application server
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CN201010105714A
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王志松
陆纪文
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ZTE Corp
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ZTE Corp
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Abstract

The invention discloses a designated pick-up service realization method and a communication system, wherein the method comprises the following steps that a first application server of a pick-up user receives a first designated pick-up request of the pick-up user, and a second application server of the pick-up user is obtained according to the number of a designated user in the first designated pick-up request; the first designated pick-up request transmits a second designated pick-up request to the second application server; and the second designated pick-up request is used for notifying the second application server to establish the conversation between a calling party and the pick-up user. By adopting the invention, the designated pick-up service among the users of different application servers can be realized, so as to realize the designated pick-up service across servers and make up the blank in the prior art.

Description

The implementation method of designated pickup service and communication system
Technical field
The present invention relates to the communications field, relate in particular to a kind of implementation method and communication system of designated pickup service.
Background technology
In order to satisfy the demand of multimedia communication, 3GPP (3rd Generation Partnership Project, third generation partner program) is organized on the basis of original packet carrying network and introduced IMS (IPMultimedia Subsystem, IP Multimedia System), IMS can not only provide traditional voice service to the user, also can provide abundant multimedia to experience to the user.
Be illustrated in figure 1 as the basic framework schematic diagram of IMS network system of the prior art, the IMS network system mainly comprises following network element: CSCF (Call Session Control Function, controlling call entity), HSS (Home Subscriber Server, home subscriber server) and AS (Application Server, application server).Wherein, CSCF is divided into three types again: S-CSCF (Serving-Call SessionControl Function, the service call controlled entity), I-CSCF (Interrogating-Call SessionControl Function, the query call controlled entity) and P-CSCF (Proxy-Call Session ControlFunction, agent call controlled entity).P-CSCF can be in the Access Network of the current location of user, and first contact network element as the user inserts the IMS network arrives the IMS core net to user's SIP (Session InitiationProtocol, initial session protocol) forwards.I-CSCF can finish the function of network internal Information hiding, network enabled safety.S-CSCF finishes basic CCF as the controlling call entity of core, and the interface with AS is provided.AS provides miscellaneous service to the user, such as basic voice, video and supplementary service.HSS writes down each IMS user's user profile and business datum, cooperates CSCF to finish routing function, and functions such as authentication, mandate are provided.User contracting data is kept among the HSS, and is downloaded to S-CSCF when the user registers, and has preserved user's IFC (Initial Filter Criteria, initial filter criteria) in the user contracting data and the address information of professional AS is provided.Business datum downloads to AS from HSS when the user registers, finish customer service for AS and handle used.
Call pick-up business (Call Pickup) is the common business of communication network, at traditional PSTN (Public Switched Telephone Network, PSTN) in, the call pick-up business is widely used, be usually used in group customer, participate in this professional user and normally be in same the user in the office, this business belongs to Centrex (concentrating user's small switch) group business.The Centrex group business is that some users are formed a customer group, and the user in the customer group also can enjoy some particular services, for example the call pick-up business except that whole basic services of enjoying ordinary telephone subscriber.
The professional enforcement scene commonly used of call pick-up is as follows: user B in the user A call group; When the terminal ring of called subscriber B, and user B just in time not or when can not off-hook replying because of thing, can replace user B with user B with group's user C, reply the call of user A.The mode of operation of user C is: use the terminal of oneself, express the hope that oneself replaces user B to reply by special dial mode; Final result is user C and user A conversation, and the terminal of user B stops ring.
According to the difference of user C dial mode, the call pick-up business can be subdivided on the same group for answering and two kinds of designated pick-ups:
1) in generation, answered on the same group
User in several groups can be divided in the different groups, all belong to a Centrex group such as the user in the enterprise, there are several offices in enterprise, by office different user is divided in the different groups.For example, when terminal is arranged in the office by ring up, can dial the access code (a string specific number) of co-group pickup service, for first ring terminal generation in is on the same group answered calling with this terminal user C on the same group.
2) designated pick-up
The enforcement of designated pickup service is irrelevant with group, can operate with user in the group.For example, when user C will be when answering the calling of user B, C dial " access code of designated pickup service+user B number " represent oneself to be ready generation answer user B go into to exhale.
Designated pickup service is the business of using between the user in the customer group.In legacy network, group business can only realize that promptly, user B in the above-mentioned designated pickup service and user C are necessary for the user (i.e. the user who distributes telephone numbers) who belongs to same application server on same application server in an end office (EO) or mobile switch.
In the IMS network, belong between the wide area cluster user of same application server and can use designated pickup service, be illustrated in figure 2 as the schematic flow sheet of the implementation method of the designated pickup service between the wide area cluster user who belongs to same application server of the prior art, said method comprising the steps of:
Step 201-step 210: calling subscriber A calls out called subscriber B, and the terminal ring of called subscriber B.
Step 211-step 212: in generation, answered user C off-hook, dial " number of the access code+B of designated pickup service ", the terminal that generation is answered user C produces a SIP Invite message, carries SDP C (medium of terminal C) in the described Invite message, is forwarded to AS through CSCF.
Step 213-step 220:AS triggers designated pickup service according to " access code of designated pickup service " that comprise in the described Invite message, and AS uses SIP Cancel (cancellation) request to allow called subscriber B stop ring.
Step 221-step 223:AS need continue user A and user C, and is concrete, and AS gives calling subscriber A SDP C by Update (renewal) forwards.
Step 224-step 226: calling subscriber A returns 200 OK message and gives AS, represents the affirmation for Update message, and carried SDP A (medium of terminal A) in 200 OK.
Step 227-step 232:AS produces 183 message, issues generation and answers user C, and carried SDP A.In generation, answered user C and produces PRACK (replying) message, as the affirmation to 183 message.AS produces 200OK message, as the affirmation to PRACK.
Step 233-step 236:AS produces 200 OK message and answers user C to generation, and as the affirmation message of Invite message, generation is answered user C ACK.
Step 237-step 242:AS produces 200 OK message and gives calling subscriber A, as the affirmation message of Invite message, and calling subscriber A ACK.
Afterwards, in calling subscriber A and generation, answered user C conversation, the call setup success.
Yet, in the IMS network, the notion that has wide area cluster, the user who promptly belongs to the different application server can form same group, and the same user's group in the same group, be that user B in the above-mentioned example may belong to different application servers with user C, but in the prior art, do not realize belonging to the method for the designated pickup service between the user of different application server.
Summary of the invention
In view of this, the invention provides a kind of implementation method and communication system of designated pickup service, can realize belonging to the designated pickup service between the user of different application server.
Technical scheme of the present invention is achieved in that
A kind of implementation method of designated pickup service comprises:
In generation, answered first application server under the user and receives described generation and answer user's the first designated pick-up request, and obtains second application server under the described designated user according to the number of designated user in the described first designated pick-up request;
Described first application server sends the second designated pick-up request to described second application server, and the described second designated pick-up request is used to notify described second application server to connect calling subscriber and described generation to answer session between the user.
Wherein, carry the access code of designated pickup service and the number of described designated user in the described first designated pick-up request; Carry the sign of designated pickup service and the number of described designated user in the described second designated pick-up request.
Wherein, carry the sign of designated pickup service and the number of described designated user in the described first designated pick-up request; Carry the sign of designated pickup service and the number of described designated user in the described second designated pick-up request.
Further, described first application server receives described generation and answers before user's the first designated pick-up request, and said method also comprises:
Described second application server receives the call request that described calling subscriber calls out described designated user, notifies described designated user ring.
Further, described first application server is after described second application server sends the second designated pick-up request, and said method also comprises:
Described second application server sends ring cancellation request to described designated user.
Wherein, in described generation, answered the user and belongs to identical wide area cluster with described designated user.
A kind of communication system comprises:
First application server is used to receive the generation that belongs to present application server to answer the first designated pick-up request that the user sends, and obtains second application server under the described designated user according to the number of designated user in the described first designated pick-up request;
Described second application server is used to receive the second designated pick-up request that described first application server sends, and wherein, the described second designated pick-up request is used to notify described second application server to connect calling subscriber and described generation to answer session between the user.
Wherein, carry the access code of designated pickup service and the number of described designated user in the described first designated pick-up request; Carry the sign of designated pickup service and the number of described designated user in the described second designated pick-up request.
Wherein, carry the sign of designated pickup service and the number of described designated user in the described first designated pick-up request; Carry the sign of designated pickup service and the number of described designated user in the described second designated pick-up request.
Preferably, in described generation, answered the user and belongs to identical wide area cluster with described designated user.
The present invention has following beneficial effect:
In generation, answered first application server under the user and receives generation and answer user's the first designated pick-up request, and obtains second application server under the designated user according to the number of designated user in the first designated pick-up request; First application server sends the second designated pick-up request to second application server, the second designated pick-up request be used to notify second application server connect the calling subscriber with for the session of answering between the user.Then can realize belonging to the designated pickup service between the user of different application server according to said method, solve the difficult problem that cross-server is realized designated pickup service, remedy the blank of prior art.
Description of drawings
Fig. 1 is the basic framework schematic diagram of IMS network system of the prior art;
Fig. 2 is the schematic flow sheet of the implementation method of the designated pickup service between the user who belongs to same application server of the prior art;
Fig. 3 is a call flow schematic diagram of setting up conversation in the IMS network of the embodiment of the invention between two users;
Fig. 4 is the flow chart according to the implementation method of the designated pickup service of the embodiment of the invention;
Fig. 5 forms the network frame schematic diagram of wide area cluster for the user who belongs to the different application server in the IMS network system of the embodiment of the invention;
Fig. 6 is the detailed process flow chart according to the implementation method of the designated pickup service of the embodiment of the invention;
Fig. 7 is the composition structure chart according to the communication system of the embodiment of the invention.
Embodiment
Before the implementation method and communication system of the designated pickup service that the embodiment of the invention is described, at first simply introduce in the IMS network and set up the call flow of conversing between two users.
Be illustrated in figure 3 as in the IMS network of the embodiment of the invention call flow schematic diagram of setting up conversation between two users, for simplicity, omitted 3 network elements among the figure, be respectively:
1) the Calling Side P-CSCF (P-CSCF under the calling subscriber A) between calling subscriber A and the Calling Side S-CSCF (S-CSCF under the calling subscriber A);
2) the callee side P-CSCF (P-CSCF under the called subscriber B) between called subscriber B and the callee side S-CSCF (S-CSCF under the called subscriber B);
3) I-CSCF between Calling Side S-CSCF and the callee side S-CSCF.
Described call flow may further comprise the steps (in the embodiments of the invention, all using Session Initiation Protocol as the messaging protocol of calling out control, the session process that described Session Initiation Protocol is used for creating, revise and one or more participants that terminate participate in):
Step 301: calling subscriber A is to the called subscriber B request of making a call, and described call request arrives Calling Side S-CSCF by Calling Side P-CSCF (figure part omitted).
Step 302: Calling Side S-CSCF is transmitted to Calling Side AS (application server under the calling subscriber A) according to the IFC of calling subscriber A with described call request.
Step 303: Calling Side AS is transmitted to Calling Side S-CSCF for after the calling subscriber carries out related service (for example call blocking business etc.) with described call request.
Step 304: Calling Side S-CSCF sends to callee side S-CSCF by I-CSCF (figure part omitted) with described call request.
Step 305: callee side S-CSCF is transmitted to callee side AS (application server under the called subscriber B) according to the IFC of called subscriber B with described call request.
Step 306: callee side AS is transmitted to callee side S-CSCF for after called subscriber B carries out related service with described call request.
Step 307: callee side S-CSCF sends to called subscriber B by callee side P-CSCF (figure part omitted) with described call request.
Step 308-314: the terminal ring of called subscriber B produce the ring response, and the reverse path that described ring is responded by described call request sends to calling subscriber A.
Step 315-321: called subscriber B off-hook, produce success response, described success response sends to calling subscriber A by the reverse path of described call request.
Step 322-328: the terminal of calling subscriber A produces acknowledge message, sends to called subscriber B by the same path of described call request.
Afterwards, calling subscriber A and called subscriber B conversation, call setup success.
In following examples, all finish communication process between two users according to the call flow in the above-mentioned steps.
Fig. 4 is according to the flow chart of the implementation method of the designated pickup service of this bright embodiment, as shown in Figure 4, may further comprise the steps:
Step S401, first application server that generation is answered under the user receives for the first designated pick-up request of answering the user, and obtain second application server under the designated user according to the number of designated user in the first designated pick-up request, preferably, in generation, answered the user and belongs to identical wide area cluster with designated user.
Step S402, first application server sends the second designated pick-up request to second application server, the second designated pick-up request be used to notify second application server connect the calling subscriber with for the session of answering between the user.
Preferably, receive for before answering user's the first designated pick-up request at first application server, second application server can receive the call request that the calling subscriber calls out designated user, the ring of notice designated user.
In addition, after second application server sent the second designated pick-up request, second application server can send ring cancellation request to designated user at first application server.
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.
The implementation method of the designated pickup service of the embodiment of the invention is applied in the IMS network system, the notion that in the IMS network system, has wide area cluster, the user who promptly belongs to the different application server can form same group, and the same user's group in the same group.Be illustrated in figure 5 as the network frame schematic diagram that the user who belongs to the different application server in the IMS network system of the embodiment of the invention forms wide area cluster, as can be seen from Figure 5, though user B, user C and user D do not belong to same application server, yet the same user that can form in the same customer group organizes.Generally, the application server C under application server B, the user C under the user B is connected with same home subscriber server with the affiliated application server D of user D, to share identical group user's data.
Below in conjunction with Fig. 5 the particular content that carries in the first designated pick-up request and the second designated pick-up request is illustrated, for example, calling subscriber A calls out called subscriber B.And called subscriber B (user B is a designated user) ring, user C answers the user for the generation of user B.
Example 1
Carry the access code of designated pickup service and the number of designated user in the first designated pick-up request, carry the sign of designated pickup service and the number of designated user in the second designated pick-up request.
In generation, answered user C and carried " generation is answered the number of access code+user B of user " in the invite request of application server (AS C) transmission of oneself, and " generation is answered the number of access code+B of user " is as the req-uri of invite request (being the first designated pick-up request mentioned above) capable (call targets of representing the SIP signaling).Particularly, access code is done for the hope of answering in order to expression C user, and the number of B is represented the targeted customer that generation is answered, and this invite request is because be that C sends, and CSCF routes requests to C user's oneself AS (AS C) by the calling number of user C.AS C according to the access code that carries in the signaling as can be known C user do the hope that generation answers operation, so AS C must be transmitted to above-mentioned invite request party B-subscriber's AS (AS B).And in order to allow the invite request can be routed to AS B, AS C must be with the access code deletion in the invite request.
AS B receives after the invite request, needs to determine that request is to be used for doing designated pickup service, so AS C can add a P-Asserted-Service field in request before transmitting the invite request.The function of this stature field defines in 3GPP TS 24.229 V8.8.0, this field can be carried a service identification, P-Asserted-Service field need aim at designated pickup service definition value, for example a P-Asserted-Service:urn:3gpp:mmtel.alarm.version1.When AS B receives this request (being the second designated pick-up request mentioned above), find to carry P-Asserted-Service field in the request, and its value representation designated pickup service, then AS B carries out the service logic of designated pick-up, comprise: 1, stop the ring of terminal B; 2, search out the user A of incoming call terminal B, the calling of continue user A and user C.In addition, in implementation procedure, not only can utilize P-Asserted-Service field to carry the designated pickup service sign, can also utilize other SIP field list first finger to decide the pick-up service sign.
Example 2
Carry the sign of designated pickup service and the number of designated user in the first designated pick-up request, carry the sign of designated pickup service and the number of designated user in the second designated pick-up request.
User C carries " sign of designated pickup service " and " number of user B " in the request that AS C sends, particularly, the number that comprises user B among the req-uri contains the designated pickup service sign in P-Asserted-Service the field (or other field); It is just passable that AS C only need be transmitted to this request AS B, need not replenish P-Asserted-Service field in invite.2 pairs of terminals of example have requirement, and terminal must be able to be discerned user's pick-up service requirement, but 1 pair of terminal of example does not have any specific (special) requirements, as long as it is just passable to realize that basic I MS calls out.
By said method, can realize belonging to the designated pickup service between the user of different application server, solved the difficult problem that cross-server is realized designated pickup service, remedied the blank of prior art.
Fig. 6 is according to the detailed process flow chart of realizing the designated pickup service of wide area cluster in the IMS network of the embodiment of the invention, as shown in Figure 6, may further comprise the steps:
Application scenarios: calling subscriber A calls out called subscriber B, and called subscriber B ring (the specific implementation flow process sees also embodiment shown in Figure 3).
Step 601, in generation, answered user C off-hook, dials " number of the access code+B of designated pickup service ", and terminal produces SIP invite request, and invite carries SDP C (medium of terminal C), is forwarded to AS C (generation is answered the application server under the user C) through CSCF.
Step 602, AS C is according to " access code of designated pickup service " that comprise in the invite request, trigger designated pickup service, after access code in the invite request removed, add the URN (being the sign of designated pickup service mentioned above) of a designated pick-up, send to AS B (application server under the designated user B).
Step 603 is to step 606, and AS B triggers designated pickup service according to the URN of the expression designated pickup service that comprises in the invite request, and AS B use SIP Cancel request, allows terminal B stop ring.
Step 607, AS B is transmitted to calling subscriber A to SDP C by the Update signaling.
Step 608, calling subscriber A returns 200 ok signalings and gives AS B, represents the affirmation for the update signaling, and carried SDP A (medium of terminal A) in 200 ok.
Step 609 is to step 610, and AS B produces 183 signalings, sends to AS C, and has carried SDPA, and AS C is transmitted to user C with 183.
Step 611 is to step 614, and user C produces the PRACK signaling, and as to 183 affirmation, and AS B produces 200 ok message, as the affirmation to PRACK.
Step 615 is to step 618, and AS B produces 200 ok information and sending and gives user C, and as the affirmation message of invite, user C returns ACK to AS B.
Step 619 is to step 620, and AS B produces 200 ok information and sending and gives user A, and as the affirmation message of invite, user A returns ACK to AS B.
Fig. 7 is the composition structure chart according to the communication system of the embodiment of the invention, and as shown in Figure 7, this communication system comprises:
First application server 71 is used to receive the generation that belongs to present application server to answer the first designated pick-up request that the user sends, and obtains second application server under the designated user according to the number of designated user in the first designated pick-up request;
Second application server 72 is used to receive the second designated pick-up request that first application server sends, wherein, the second designated pick-up request be used to notify second application server connect the calling subscriber with for the session of answering between the user.
Wherein, carry the access code of designated pickup service and the number of designated user in the first designated pick-up request; Carry the sign of designated pickup service and the number of designated user in the second designated pick-up request; Perhaps, carry the sign of designated pickup service and the number of designated user in the first designated pick-up request; Carry the sign of designated pickup service and the number of designated user in the second designated pick-up request.
Preferably, in generation, answered the user and belongs to identical wide area cluster with designated user.
Fig. 7 is the system corresponding with previous methods, and the course of work of system and operation principle are described in detail in the method part, do not repeat them here, and the description of appropriate section gets final product in the reference method.
By means of technique scheme of the present invention, can realize belonging to the designated pickup service between the user of different application server, solved the difficult problem that cross-server is realized designated pickup service, remedied the blank of prior art.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (10)

1. the implementation method of a designated pickup service is characterized in that, comprising:
In generation, answered first application server under the user and receives described generation and answer user's the first designated pick-up request, and obtains second application server under the described designated user according to the number of designated user in the described first designated pick-up request;
Described first application server sends the second designated pick-up request to described second application server, and the described second designated pick-up request is used to notify described second application server to connect calling subscriber and described generation to answer session between the user.
2. method according to claim 1 is characterized in that,
Carry the access code of designated pickup service and the number of described designated user in the described first designated pick-up request;
Carry the sign of designated pickup service and the number of described designated user in the described second designated pick-up request.
3. method according to claim 1 is characterized in that,
Carry the sign of designated pickup service and the number of described designated user in the described first designated pick-up request;
Carry the sign of designated pickup service and the number of described designated user in the described second designated pick-up request.
4. method according to claim 1 is characterized in that, described first application server receives described generation and answers before user's the first designated pick-up request, also comprises:
Described second application server receives the call request that described calling subscriber calls out described designated user, notifies described designated user ring.
5. method according to claim 1 is characterized in that, described first application server also comprises after described second application server sends the second designated pick-up request:
Described second application server sends ring cancellation request to described designated user.
6. according to each described method in the claim 1 to 5, it is characterized in that described generation is answered the user and belongs to identical wide area cluster with described designated user.
7. a communication system is characterized in that, comprising:
First application server is used to receive the generation that belongs to present application server to answer the first designated pick-up request that the user sends, and obtains second application server under the described designated user according to the number of designated user in the described first designated pick-up request;
Described second application server is used to receive the second designated pick-up request that described first application server sends, and wherein, the described second designated pick-up request is used to notify described second application server to connect calling subscriber and described generation to answer session between the user.
8. communication system according to claim 7 is characterized in that,
Carry the access code of designated pickup service and the number of described designated user in the described first designated pick-up request;
Carry the sign of designated pickup service and the number of described designated user in the described second designated pick-up request.
9. communication system according to claim 7 is characterized in that,
Carry the sign of designated pickup service and the number of described designated user in the described first designated pick-up request;
Carry the sign of designated pickup service and the number of described designated user in the described second designated pick-up request.
10. according to each described communication system in the claim 7 to 9, it is characterized in that described generation is answered the user and belongs to identical wide area cluster with described designated user.
CN201010105714A 2010-01-22 2010-01-22 Designated pick-up service realization method and communication system Pending CN101790010A (en)

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WO2016197677A1 (en) * 2015-06-12 2016-12-15 中兴通讯股份有限公司 Co-group pick-up method and apparatus for multiple service control processors, service control processor and computer storage medium

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WO2009069584A1 (en) * 2007-11-27 2009-06-04 Mitsui Chemicals Polyurethanes, Inc. Method of dehydrating tolylenediamine and dehydrator

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WO2009069584A1 (en) * 2007-11-27 2009-06-04 Mitsui Chemicals Polyurethanes, Inc. Method of dehydrating tolylenediamine and dehydrator
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Application publication date: 20100728