CN103685167A

CN103685167A - Method, device and equipment for managing IMS session

Info

Publication number: CN103685167A
Application number: CN201210328014.7A
Authority: CN
Inventors: 星芸鹏; 任京辉; 王晓强
Original assignee: Alcatel Optical Networks Israel Ltd
Current assignee: Alcatel Optical Networks Israel Ltd
Priority date: 2012-09-06
Filing date: 2012-09-06
Publication date: 2014-03-26
Also published as: WO2014037799A3; WO2014037799A2

Abstract

The invention aims to provide a method, device and equipment for managing IMS session. According to the method, the agency call session control equipment belongs to a first cluster comprising a plurality of agency call session control equipment. The method comprises the following steps: when invitation information used for inviting to build a session is received, extracting equipment identification information of the equipment related to the session from the invitation information; determining network address information of another agency call session control equipment storing the equipment identification information in the first cluster; acquiring first register information corresponding to the equipment identification information from the determined another agency call session control equipment. According to the invention, the advantages of well expandability and well load balancing can be achieved.

Description

A kind of method that session manages to IMS, device and equipment

Technical field

The present invention relates to communication technical field, relate in particular to a kind of method that session manages to IMS, device and equipment.

Background technology

In prior art, have the CSCF (CSCF, Call Session Control Function) that three kinds of modes determine that session is used.Yet each method has its limitation.

Wherein, modal is by the method for IP Multimedia System (IMS, IP Multimedia Subsystem) subscriber and CSCF entity permanent bindings.

The problem of this kind of method is: 1) can not support the user of collective (wholesale).For example,, for the subscriber " * of company @facebook.com", it represents all users of Facebook company.Under existing permanent bindings mechanism, at synchronization, from all IMS sessions of Facebook company, all by the same CSCF that comprises this subscriber's log-on message, supported.This is difficult to load to single CSCF, finally causes processing the problems such as calling; 2) can not carry out load balance.For unique user, likely produce a large amount of subscribers and concentrate the situation of carrying out call session by small part CSCF, now, easily cause the load overload of this small part CSCF, remaining other CSCF are idle situation in vain, is unfavorable for distributing rationally of load.

The second way is employing center registration database.In the case, all subscribers' log-on message is all stored in the registration database of center, and when subscriber's initiation session, CSCF Cong Gai center registration database obtains the corresponding log-on message with subscriber.

The problem of the method is: 1) due in whole system, by having a large amount of CSCF, read or data writing from the registration database of center, cause this center registration database to become the performance bottleneck part of whole IMS system simultaneously; 2) fault of this center registration database individual node just may cause all CSCF to work, and has reduced the fail safe of system; 3) after the performance of center registration database self reaches capacity, increasing in any case CSCF also cannot expanding system performance, and therefore, center registration database is also the bottleneck of the scalability of whole system.

The third mode is in each CSCF, to preserve all subscribers' log-on message, when a CSCF has new subscriber's information, is synchronized to other each CSCF.

The problem of the method is that the throughput of whole system can only depend on the performance of single CSCF, effectively expanding system performance.

Summary of the invention

The object of this invention is to provide a kind of method that session manages to IMS, device and equipment.

According to an aspect of the present invention, provide a kind of in agent call session control equipment for the method that session manages to IMS, wherein, this agent call session control equipment belongs to the first cluster that comprises a plurality of agent call session control equipments, wherein, the method comprises:

A, when receiving when inviting the message request of setting up session, extracts the equipment identification information of the equipment relevant with described session in this message request;

B, according to obtained equipment identification information, determines the network address information of storing another agent call session control equipment of this equipment identification information in described the first cluster;

C obtains first log-on message corresponding with this equipment identification information from determined another agent call session control equipment.

According to an aspect of the present invention, provide a kind of in service call session control equipment for session manages to IMS method, described service call session control equipment belongs to the second cluster that comprises a plurality of service call session control equipments, and wherein, the method comprises:

B, according to obtained equipment identification information, determines the network address information of storing another service call session control equipment of this equipment identification information in described the second cluster;

C obtains second log-on message corresponding with this equipment identification information from determined another service call session control equipment.

According to an aspect of the present invention, a kind of agent call session control equipment managing for the session to IMS is provided, and wherein, described agent call session control equipment belongs to and comprises a plurality of the first clusters of acting on behalf of session control equipment, wherein, described agent call session control equipment comprises:

The first acquisition device for when receiving when inviting the message request of setting up session, extracts the equipment identification information of the equipment relevant with described session in this message request;

The first determining device, for according to obtained equipment identification information, determines the network address information of storing another agent call session control equipment of this equipment identification information in described the first cluster;

The second acquisition device, for obtaining first log-on message corresponding with this equipment identification information from determined another agent call session control equipment.

According to an aspect of the present invention, a kind of service call session control equipment managing for the session to IMS is provided, described first service call session control appliance belongs to the second cluster consisting of a plurality of service call session control equipments, wherein, described service call session control equipment comprises:

The 3rd acquisition device for when receiving when inviting the message request of setting up session, extracts the equipment identification information of the equipment relevant with described session in this message request;

The second determining device, for according to obtained equipment identification information, determines the network address information of storing another service call session control equipment of this equipment identification information in described the second cluster;

The 4th acquisition device, for obtaining second log-on message corresponding with this equipment identification information from determined another service call session control equipment.

According to an aspect of the present invention, provide a kind of IMS conversational system, wherein, described system comprises the first cluster and the second cluster, wherein, described the first cluster comprises a plurality of described agent call session control equipments, and described the second cluster comprises a plurality of described service call session control equipments.

Compared with prior art, the present invention has the following advantages: each agent call session control equipment or service call session control equipment all can obtain the log-on message of storing on other agent call session control equipments in cluster under it or service call session control equipment, thereby make each agent call session control equipment or service call session control equipment can support the session of not initiating the subscriber from registering with it, thereby can support the session of being initiated by same subscriber's account by a plurality of agent call session control equipments or service call session control equipment, that is can support the mode of the user of collective (wholesale), simultaneously, because DNS can sort according to the actual loading of each IP when resolving domain name, therefore can preferentially select the less agent call session control equipment of load or service call session control equipment to carry out session operation, thereby realize the load balancing of each agent call session control equipment or service call session control equipment.And, thereby the first cluster according to the present invention can adopt P2P agreement to be connected with CSCF in the second cluster, make described the first cluster and the second cluster all there is good extensibility.

Accompanying drawing explanation

By reading the detailed description that non-limiting example is done of doing with reference to the following drawings, it is more obvious that other features, objects and advantages of the present invention will become:

Fig. 1 has illustrated according to rising of a kind of IMS conversational system of the present invention and has exhaled network portion;

Fig. 2 has illustrated that a kind of session manages to IMS in call session control appliance works the method flow diagram of exhaling the stage according to of the present invention;

Fig. 3 has illustrated and has been exhaled network portion according to a kind of IMS conversational system of the present invention;

Fig. 4 has illustrated according to a kind of method flow diagram of being exhaled the stage that session manages to IMS in call session control appliance of the present invention;

Fig. 5 has illustrated according to the structural representation of a kind of agent call session control equipment of the present invention;

Fig. 6 has illustrated according to the structural representation of a kind of service call session control equipment of the present invention;

In accompanying drawing, same or analogous Reference numeral represents same or analogous parts.

Embodiment

Below in conjunction with accompanying drawing, the present invention is described in further detail.

Fig. 1 has illustrated according to a kind of IP Multimedia System (IMS of the present invention, IP Multimedia Subsystem,) rising of conversational system exhale network portion, wherein, exhale the IMS conversational system of network portion to comprise subscriber equipment 300, comprise a plurality of agent call session control equipment (P-CSCF for described, Proxy Call Session Control Function) the first cluster, and the second cluster that comprises a plurality of service call session control equipments (S-CSCF, Service Call Session Control Function).Wherein, described user equipment (UE) 1 is as calling party, corresponding the first domain-name information of described the first cluster; Corresponding the second domain-name information of the second cluster.

For simplicity's sake, in the first cluster of Fig. 1, only illustrated that agent call session control equipment 101 is to agent call session control equipment 104 totally 4 agent call session control equipments, in the second cluster, only illustrated that service call session control equipment 201 is to service call session control equipment 204 totally 4 service call session control equipments.

Those skilled in the art should, according to practical application and demand, determine number of devices separately in two clusters.

Wherein, other agent call session control equipments that each the agent call session control equipment in described the first cluster all can be from this cluster obtain the first log-on message of subscribers; Each service call session control equipment in described the second cluster all can be from this cluster other service call session control equipments obtain the second log-on message of subscribers.

Preferably, described a plurality of agent call session control equipments, or described a plurality of service call session control equipments, based on P2P agreement, as Chord agreement etc., connect to form cluster.

Fig. 2 has illustrated that a kind of session manages to IMS in call session control appliance works the method flow diagram of exhaling the stage according to of the present invention.

Wherein, exhale the method in stage to comprise step S11, step S12, the step S13 being carried out by agent call session control equipment for described, and the step S21 being carried out by service call session control equipment, step S22 and step S23.

In step S11, when acting on behalf of call session control appliance, receive when inviting the message request of setting up session, in this message request, extract the equipment identification information of the equipment relevant with described session.

Wherein, described equipment identification information comprises the information for unique identification subscriber equipment.Preferably, described equipment identification information includes but not limited to following any one:

1) public subscriber identification of subscriber equipment (PUID, Public User Identity);

2) other can be used for unique identification user's information, as IMEI number of mobile phone, No. ESN etc.

Preferably, described message request is during from subscriber equipment, and described step S11 further comprises step S111 (not shown).

In step S111, agent call session control equipment extracts the equipment identification information as the subscriber equipment of calling party from described message request.

According to the first example of the present invention, when subscriber equipment 300 makes a call according to the first domain-name information corresponding with the first cluster, obtain a plurality of network address information of dns resolution the first domain-name information gained: P_IP1, P_IP2, P_IP3 and P_IP4, it corresponds respectively to the agent call session control equipment 101,102,103 and 104 in the first cluster.Subscriber equipment 300 is selected network address information P_IP1, and the message request sending for initiation session to the corresponding agent call session control equipment 101 of this network address information P_IP1.

Agent call session control equipment 101 receives after this message request from subscriber equipment 300, extracts the equipment identification information PUID_1 as the subscriber equipment 300 of calling party from " From " field of this message request head.

It should be noted that, above-mentioned for example only for technical scheme of the present invention is described better, but not limitation of the present invention, those skilled in the art should understand that, it is any that from described message request, extraction, all should be within the scope of the present invention as the implementation of the equipment identification information of the subscriber equipment of calling party.

In step S12, agent call session control equipment, according to obtained equipment identification information, is determined the network address information of storing another agent call session control equipment of this equipment identification information in described the first cluster.

Wherein, on each agent call session control equipment of described the first cluster, all store the index information of the equipment identification information of storing of each other agent call session control equipments in this cluster.Wherein, described index information comprises the corresponding relation of equipment identification information and each agent call session control equipment, preferably, described index information comprises equipment identification information is carried out to the key assignments obtaining after preliminary treatment, the cryptographic Hash for example, obtaining after adopting predetermined Hash function to process to it, with the corresponding relation of each agent call session control equipment.

Particularly, described agent call session control equipment, according to the corresponding relation of described equipment identification information and each agent call session control equipment, is determined the network address information of another the agent call session control equipment corresponding with the equipment identification information obtaining in step S11.

Continuing to see figures.1.and.2 describes aforementioned the first example, and agent call session control equipment 101 adopts predetermined hash function to enter Hash to the equipment identification information PUID_1 of obtained subscriber equipment 300 and processes, to obtain cryptographic Hash Hash_2.Wherein, the concordance list in agent call session control equipment P1 is as shown in table 1 below,

Table 1

Cryptographic Hash	Network address information
		Hash_11	P_IP1
Hash_12	P_IP2
		Hash_13	P_IP3
Hash_14	P_IP4

Agent call session control equipment 101 is inquired about in the concordance list 1 of self, to obtain the network address information P_IP2 of another agent call session control equipment that stores PUID_1.

It should be noted that, in above-mentioned steps, determined another agent call session control equipment of described agent call session control equipment can be both other agent call session control equipments, and also can be it can be self.

It should be noted that, above-mentioned for example only for technical scheme of the present invention is described better, but not limitation of the present invention, those skilled in the art should understand that, any according to obtained equipment identification information, determine the implementation of the network address information of another agent call session control equipment of storing this equipment identification information in described the first cluster, all should be within the scope of the present invention.

Then,, in step S13, agent call session control equipment obtains first log-on message corresponding with this equipment identification information from determined another agent call session control equipment.

Continue to see figures.1.and.2 aforementioned the first example is described, agent call session control equipment 101, according to determined network address information P_IP2 in step S12, obtains the first log-on message Reg_1 corresponding with the equipment identification information PUID_1 of subscriber equipment 300 from agent call session control equipment 102 corresponding to this network address information P_IP2.

It should be noted that, above-mentioned for example only for technical scheme of the present invention is described better, but not limitation of the present invention, those skilled in the art should understand that, any basis is obtained the implementation of first log-on message corresponding with this equipment identification information from determined another agent call session control equipment, all should be within the scope of the present invention.

It should be noted that, when acting on behalf of call session control appliance, in step S12, determined another agent call session control equipment is when other agent call session control equipments, and this agent call session control equipment receives by carrying out interactive communication with this another agent call session control equipment the first log-on message that described equipment identification information that the latter sends is corresponding; And when another agent call session control equipment is himself, a plurality of the first log-on messages that described agent call session control equipment is directly stored from self, obtain first log-on message corresponding with described equipment identification information.

Preferably, when described message request is during from subscriber equipment, the second domain-name information that comprises the second cluster in the first log-on message that agent call session control equipment obtains in step S13, described method also comprises step S14 (not shown) and the step S15 (not shown) that agent call session control equipment is carried out.

In step S14, agent call session control equipment obtains a plurality of network address information corresponding with described the second domain-name information.

Particularly, described agent call session control equipment is to DNS request analysis the second domain-name information, and receives the network address information of a plurality of service call session control equipments in second cluster corresponding with the second domain-name information of resolving from DNS.

Continue to see figures.1.and.2 aforementioned the first example is described, agent call session control equipment 101 is from the first log-on message being obtained by another agent call session control equipment 102, extract second domain-name information corresponding with the second cluster, then, agent call session control equipment 101 is to this second domain-name information of DNS request analysis, and the network address information receiving from a plurality of service call session control equipments in the second cluster after dns resolution is respectively S_IP1, S_IP2, S_IP3 and S_IP4, it corresponds respectively to the service call session control equipment 201 in the second cluster, 202, 203 and 204.

In step S15, agent call session control equipment is selected a network address information in described a plurality of network addresss, and the service call session control equipment in its corresponding described second cluster sends this message request.

Continue to see figures.1.and.2 aforementioned the first example is described, agent call session control equipment 101 is selected network address information S_IP3 from four obtained network address information, and sends the message requests for initiation session to 203 in its corresponding second cluster.

Then,, in step S21, when service call session control equipment receives when inviting the message request of setting up session, in this message request, extract the equipment identification information of the equipment relevant with described session.

Preferably, when described message request is during from agent call session control equipment, the rapid S21 of described step 10 further comprises step S211.

In step S211, when described message request is during from agent call session control equipment, service call session control equipment obtains the equipment identification information as the subscriber equipment of calling party from described message request.

Continue to see figures.1.and.2 aforementioned the first example is described, service call session control equipment 203 receives the message request from agent call session control equipment 101, and extracts the equipment identification information PUID_1 as the subscriber equipment 300 of calling party from " P-Asserted-Identity " or " From " field of the head of this message request.

Then,, in step S22, service call session control equipment, according to obtained equipment identification information, is determined the network address information of storing another service call session control equipment of this equipment identification information in described the second cluster.

Wherein, on each service call session control equipment of described the second cluster, all store the index information of the equipment identification information of storing of each other service call session control equipments in this cluster.Wherein, described index information comprises the corresponding relation of equipment identification information and each service call session control equipment, preferably, described index information comprises equipment identification information is carried out to the key assignments obtaining after preliminary treatment, the cryptographic Hash for example, obtaining after adopting predetermined Hash function to process to it, with the corresponding relation of each service call session control equipment.

Particularly, described service call session control equipment, according to the corresponding relation of described equipment identification information and each service call session control equipment, is determined the network address information of another the service call session control equipment corresponding with the equipment identification information obtaining in step S211.

Continuing to see figures.1.and.2 describes aforementioned the first example, and service call session control equipment 203 adopts predetermined hash function to enter Hash to the PUID_1 of obtained subscriber equipment 300 and processes, to obtain cryptographic Hash Hash_22.Wherein, the concordance list in service call session control equipment 203 is as shown in table 2 below:

Table 2

Cryptographic Hash	Network address information
		Hash_21	S_IP1
Hash_22	S_IP2
		Hash_23	S_IP3
Hash_24	S_IP4

Service call session control equipment 203 is inquired about in the concordance list 1 of self, to obtain the network address information S_IP2 of another service call session control equipment that stores PUID_1.

It should be noted that, determined another service call session control equipment of described service call session control equipment can be self.

It should be noted that, above-mentioned for example only for technical scheme of the present invention is described better, but not limitation of the present invention, those skilled in the art should understand that, any according to obtained equipment identification information, determine the implementation of the network address information of another service call session control equipment of storing this equipment identification information in described the second cluster, all should be within the scope of the present invention.

Then,, in step S23, service call session control equipment obtains second log-on message corresponding with this equipment identification information from determined another service call session control equipment.

Continue to see figures.1.and.2 aforementioned the first example is described, service call session control equipment 203, according to determined network address information S_IP2 in step S22, obtains the second log-on message Reg_2 corresponding with the equipment identification information PUID_1 of subscriber equipment 300 from service call session control equipment 202 corresponding to this network address information S_IP2.

It should be noted that, above-mentioned for example only for technical scheme of the present invention is described better, but not limitation of the present invention, those skilled in the art should understand that, any basis is obtained the implementation of second log-on message corresponding with this equipment identification information from determined another service call session control equipment, all should be within the scope of the present invention.

It should be noted that, when service call session control equipment is when in step S22, determined another service call session control equipment is other service call session control equipments, this service call session control equipment receives by carrying out interactive communication with this another service call session control equipment the second log-on message that described equipment identification information that the latter sends is corresponding; And when another service call session control equipment is himself, a plurality of the second log-on messages that this service call session control equipment is directly stored from self, obtain second log-on message corresponding with described equipment identification information.

One of according to a preferred embodiment of the invention, described service call session control equipment also performs step S26 (not shown).

In step S26, when service call session control equipment obtains after the second log-on message, carried out and exhaled operation, and this message request is sent to and is exhaled network.

Particularly, described service call session control equipment is sent to query call session control equipment (I-CSCF by message request, Interrogating Call Session Control Function), this message request is sent to the called network corresponding with callee.

The method according to this invention, each agent call session control equipment or service call session control equipment all can obtain the log-on message of storing on other agent call session control equipments in cluster under it or service call session control equipment, thereby make each agent call session control equipment or service call session control equipment can support the session of not initiating the subscriber from registering with it, thereby can support the session of being initiated by same subscriber's account by a plurality of agent call session control equipments or service call session control equipment, that is can support the mode of the user of collective (wholesale), simultaneously, because DNS can sort according to the actual loading of each IP when resolving domain name, therefore can preferentially select the less agent call session control equipment of load or service call session control equipment to carry out session operation, thereby realize the load balancing of each agent call session control equipment or each service call session control equipment.And, according to the CSCF in the first cluster of the present invention and the second cluster, can adopt P2P agreement to carry out; Thereby connecting makes described the first cluster and the second cluster all have good extensibility.

As one of the preferred embodiments of the present invention, the method according to this invention is also included in the method for registered user on agent call session control equipment and service call session control appliance, wherein, described method also comprises step S17 (not shown) and the step S18 (not shown) of being carried out by agent call session control equipment, and the step S27 (not shown) of being carried out by service call session control equipment and step S28 (not shown).

Subscriber equipment to be registered is initiated registration request according to the first domain-name information of the first cluster, wherein, user equipment requests domain name resolution server (DNS) is resolved the first domain-name information, and by resolving in a plurality of network address information corresponding with the first domain-name information that obtain, select a network address information, and send registration request to its corresponding agent call session control equipment.

In step S17, when acting on behalf of call session control appliance and receive the registration request relevant to subscriber equipment to be registered, according to the equipment identification information of the subscriber equipment to be registered comprising in this registration request, determine a network address information of acting on behalf of session control equipment should storing this equipment identification information in described the first cluster.

Wherein, described agent call session control equipment is determined corresponding to subscriber equipment to be registered storing the agent call session control equipment of its first log-on message based on pre-defined rule.

Preferably, described pre-defined rule comprises the first log-on message of the subscriber equipment of storing predetermined scope on each agent call session control equipment.

For example, the first cluster of current I MS conversational system comprises 3 agent call session control equipment P1, P2, P3.Wherein, pre-defined rule is as shown in table 3 below:

Table 3

And, when having new agent call session control equipment P4 to add this first cluster, the cryptographic Hash scope that agent call session control equipment P3 is corresponding is adjusted into 201～300, cryptographic Hash scope corresponding to agent call session control equipment P4 newly adding is adjusted into >=301.When having other agent call session control equipments to add this cluster, the like determine the cryptographic Hash scope that it is corresponding.

More preferably, each agent call session control equipment in current the first cluster connects based on Chord agreement, and the cryptographic Hash of the IP address based on each agent call session control equipment is determined the cryptographic Hash scope that each agent call session control equipment is corresponding.And, on described each agent call session control equipment connecting based on Chord agreement, all comprise the network address information of each other agent call session control equipments.

With reference to Fig. 1, aforementioned the first example is proceeded to explanation, 4 agent call session control equipments in the first cluster are respectively according to the cryptographic Hash size of its network address information, determine the corresponding cryptographic Hash scope of each agent call session control equipment (wherein, Hash_IP1 < Hash_IP2 < Hash_IP3 < Hash_IP4) as shown in table 4 below:

Table 4

When having new agent call session control equipment to add this cluster, each agent call session control equipment basis is the cryptographic Hash size of network address information separately, redefines the cryptographic Hash scope interval of the equipment identification information of the subscriber equipment of storing on each agent call session control equipment.

When user equipment (UE) _ 1 to be registered (not shown) is selected the agent call session control equipment 102 in the first cluster, and send registration request to it.Agent call session control equipment 102 extracts the equipment identification information PUID_2 of user equipment (UE) _ 1 to be registered from obtained registration request, and adopt predetermined hash function to process, determine that the cryptographic Hash corresponding with equipment identification information PUID_2 is Hash_2, and, agent call session control equipment 102 is determined Hash_IP2 < Hash_2 < Hash_IP3, and agent call session control equipment 102 determines that equipment identification information PUID_2 should be stored in agent call session control equipment 103.

It should be noted that, in step S17, another agent call session control equipment that this agent call session control equipment is identified for storage device identification information can be both other agent call session control equipments, also can be himself.

It should be noted that, above-mentioned for example only for technical scheme of the present invention is described better, but not limitation of the present invention, those skilled in the art should understand that, any according to the equipment identification information of the subscriber equipment to be registered comprising in this registration request, determine an implementation of acting on behalf of the network address information of session control equipment should storing this equipment identification information in described the first cluster, all should be within the scope of the present invention.

Then,, in step S18, agent call session control equipment is carried out corresponding operating, so that determined this agent call session control equipment receives described registration request.

Particularly, described execution corresponding operating so that the mode that determined this agent call session control equipment receives described registration request include but not limited to following any:

1) agent call session control equipment is to the network address information of determined agent call session control equipment in subscriber equipment feedback step S17 to be registered, by this, to be registeredly with equipment, to determined agent call session control equipment in step S27, sends registration request.

With reference to Fig. 1, aforementioned the first example is proceeded to explanation, agent call session control equipment 102 determines that in step S17 current equipment identification information PUID_2 should be stored in agent call session control equipment 103, and the network address information P_IP3 of agent call session control equipment 103 is sent to user equipment (UE) _ 1 to be registered.User equipment (UE) _ 1, according to network address information P_IP3, sends registration request to agent call session control equipment 103.

2) agent call session control equipment is directly sent to registration request in the determined agent call session control equipment of step S17.

It should be noted that, above-mentioned for example only for technical scheme of the present invention is described better, but not limitation of the present invention, those skilled in the art should understand that, any execution corresponding operating, so that determined this agent call session control equipment receives the implementation of described registration request, all should be within the scope of the present invention.

Then, when the agent call session control equipment of the equipment identification information of determined in step S17, application memory equipment to be registered receives the registration request of this equipment to be registered, this agent call session control equipment is sent to I-CSCF by this registration request, and the first domain-name information of the first cluster under this agent call session control equipment is contained in the header field of this registration request.

Then, receive the I-CSCF of described registration request to home subscriber server (HSS, Home Subscriber Server) send user-authorization-request (URA, User-Authorization-Request), take and determine to be served as this subscriber equipment to be registered by which service call session control equipment, receive second domain-name information corresponding with the second cluster from HSS feedback, I-CSCF asks this second domain-name information of dns resolution, and by resolving in a plurality of network address information of gained acquisition, select a network address information, and send registration request to its corresponding service call session control equipment.

Then, in step S27, when receiving the registration request relevant to subscriber equipment to be registered, service call session control equipment, according to the equipment identification information of the subscriber equipment to be registered in this registration request, is determined the network address information that should store a serving session control equipment of this equipment identification information in described the second cluster.

Wherein, the building mode of the second cluster is similar to the building mode of aforementioned the first cluster.

Wherein, service call session control equipment is according to the equipment identification information of the subscriber equipment to be registered in this registration request, determine in the mode of network address information of a serving session control equipment should storing this equipment identification information in described the second cluster and abovementioned steps S17 that agent call session control equipment is according to the equipment identification information of the subscriber equipment to be registered in this registration request, the mode of network address information of determining a serving session control equipment should storing this equipment identification information in described the first cluster is same or similar, does not repeat them here.

Then,, in step S28, service call session control equipment is carried out corresponding operating, so that determined this serving session control equipment receives described registration request.

Wherein, described service call session control equipment is carried out corresponding operating, so that receiving agent call session control equipment described in described registration request and abovementioned steps S218, determined this serving session control equipment carries out corresponding operating, so that the method that determined this agent call session control equipment receives described registration request is same or similar, do not repeat them here.

Then, determined in step S28, for the service call session control equipment of equipment identification information of storing equipment to be registered to home subscriber server (HSS, Home Subscriber Server) send the multimedia authentication request (MAR of the second domain-name information that comprises the second set, Multimedia-Auth-Request) and server-assignment request (SAR, Server-Assignment-Request).Then, this service call session control equipment is after receiving the feedback information of HSS, from creating corresponding the second log-on message as equipment identification information, the first domain-name information is contained in described the second log-on message, and sends to I-CSCF the confirmation that comprises the second domain-name information.

Query call session control equipment receives after the confirmation from service call session control equipment, by this confirmation be sent to determined in step S17, for storing the agent call session control equipment of the equipment identification information of equipment to be registered, this agent call session control equipment creates first log-on message corresponding with this subscriber equipment to be registered at self, and the second domain-name information in confirmation is contained in this first log-on message.

According to the method for the present embodiment, according to the equipment identification information of subscriber equipment, determine the equipment of memory registration information, thereby make each agent call session control equipment or service call session control equipment to determine that the log-on message of the subscriber equipment of initiation session is specifically stored in which agent call session control equipment or service call session control equipment by similar mode, thereby the session that subscriber that each agent call session control equipment or service call session control equipment can be processed not in himself registration is initiated.Thereby can support the mode of collective's session (wholesale), and, can select the lighter agent call session control equipment of load or service call session control equipment to realize session, thus the load balancing of realization.

Fig. 3 has illustrated and has been exhaled network portion according to a kind of IMS conversational system of the present invention, wherein, describedly exhaled the IMS conversational system of network portion to comprise subscriber equipment 300, comprised a plurality of agent call session control equipment (P-CSCF, Proxy Call Session Control Function) the first cluster, and the second cluster that comprises a plurality of service call session control equipments (S-CSCF, Service Call Session Control Function).Wherein, described subscriber equipment 300 is as callee, corresponding the first domain-name information of described the first cluster; Corresponding the second domain-name information of the second cluster.

For example for simplicity, in the first cluster of Fig. 3, only illustrate agent call session control equipment 101 to 104 these 4 agent call session control equipments, in the second cluster, only illustrated service call session control equipment 201 to 204 these 4 service call session control equipments.

Fig. 4 has illustrated according to a kind of method flow diagram of being exhaled the stage that session manages to IMS in call session control appliance of the present invention.

Wherein, the described method in stage of being exhaled comprises step S11, step S12, the step S13 being carried out by agent call session control equipment (P-CSCF), and step S21, the step S22 and the step S23 that by service call session control equipment (S-CSCF), are carried out.Wherein, exhaled in the stage, described step S11 further comprises step S112 (not shown), described step S21 further comprises step S212 (not shown), wherein, described agent call session control equipment also performs step S16 (not shown), and described service call session control equipment also performs step S24 (not shown) and step S25 (not shown).

Wherein, the step S11 being carried out by agent call session control equipment, step S12, step S13, and the step S21 being carried out by service call session control equipment, step S22 and step S23 are described in detail in the embodiment shown in seeing figures.1.and.2, and be contained in by reference this, repeat no more.

Exhaled the stage, from rising, exhale the serviced call session control appliance of message request of network to be sent to query call session control equipment (Interrogating Call Session Control Function, hereinafter to be referred as " I-CSCF "), I-CSCF is to home subscriber server (HSS, Home Subscriber Server) send location information request information (LIR, Location-Info-Request) to determine by which service call session control equipment, serving callee, then, I-CSCF receives the second domain-name information feeding back from home subscriber server.I-CSCF selects a network address information from a plurality of network address information corresponding with described the second domain-name information, and sends message request to its corresponding service call session control equipment.

Then,, in step S212, when described message request is during from query call session control equipment, service call session control equipment obtains the equipment identification information as callee's subscriber equipment from described message request.

2) other can be used for unique identification user equipment information, as IMEI number of mobile phone, No. ESN etc.

Particularly, described service call session control equipment obtains callee's equipment identification information from the predetermined field of head of message request.

According to the second example of the present invention, I-CSCF request dns resolution second domain-name information corresponding with the second cluster, and obtaining following a plurality of network address information: S_IP1, S_IP2, S_IP3 and S_IP4, it corresponds respectively to the service call session control equipment 201,202,203 and 204 in the second cluster.I-CSCF selects network address information S_IP1, and the message request sending for initiation session to the corresponding service call session control equipment 201 of this network address information S_IP1.

Then, service call session control equipment 201 receives after the message request from this I-CSCF, in " Request URI " field of this message request, obtains the equipment identification information PUID_1 as callee's subscriber equipment.

Then,, at step S22 and step S23, service call session control equipment obtains second log-on message corresponding with this equipment identification information.Wherein, the first domain-name information that described the second log-on message comprises the first cluster.

Then,, in step S24, service call session control equipment obtains a plurality of network address information corresponding with described the first domain-name information.

Particularly, described service call session control equipment is to DNS request analysis the first domain-name information, and receives the network address information of a plurality of service call session control equipments in first cluster corresponding with the first domain-name information of resolving from DNS.

Continuation describes aforementioned the second example, service call session control equipment 201 is determined the network address information S_IP2 of another service call session control equipment of storage device identification information PUID_1 in step S22, and in step S23, from the corresponding service call session control equipment 202 of network address information S_IP2, obtain the second log-on message Reg_2 corresponding with this equipment identification information PUID_1, and obtain first domain-name information corresponding with the first cluster from the second log-on message Reg_2.

Then, service call session control equipment 201 is to this first domain-name information of DNS request analysis, and the network address information receiving from four agent call session control equipments in the first cluster after dns resolution is respectively P_IP1, P_IP2, P_IP3 and P_IP4, it corresponds respectively to the agent call session control equipment 101,102,103 and 104 in the first cluster.

In step S25, service call session control equipment is selected a network address information in described a plurality of network addresss, and the service call session control equipment in its corresponding described second cluster sends this message request.

Continuation describes aforementioned the second example with reference to Fig. 3 and Fig. 4, service call session control equipment 201 is selected network address information P_IP3 from four obtained network address information, and the agent call session control equipment 103 in its corresponding first cluster sends the message request that is used for initiation session.

Then, in step S112, described message request is during from service call session control equipment, and agent call session control equipment extracts the equipment identification information as callee's subscriber equipment from described message request.

Continuation describes aforementioned the second example with reference to Fig. 3 and Fig. 4, agent call session control equipment 103 receives the message request from service call session control equipment 201, and for example in " Request URI ", obtains the equipment identification information PUID_1 as callee's subscriber equipment by the field of this message request.

Then, agent call session control equipment, by step S12 and step S13, obtains equipment first log-on message corresponding with the equipment identification information described in step S112.

Then,, after obtaining described the first log-on message, in step S16, agent call session control equipment has been carried out and has been exhaled operation, and this message request is sent to the subscriber equipment corresponding with this equipment identification information.

Continuation describes aforementioned the second example with reference to Fig. 3 and Fig. 4, agent call session control equipment 103 is determined the network address information P_IP2 of another service call session control equipment of storage device identification information PUID_1 in step S12, and in step S13, from the corresponding agent call session control equipment 102 of network address information P_IP2, obtain the first log-on message Reg_1 corresponding with this equipment identification information PUID_1.

Then, agent call session control equipment 103 sends message request to the subscriber equipment 300 as called party corresponding with this equipment identification information PUID_1.

The method according to this invention, each agent call session control equipment or service call session control equipment all can obtain the log-on message of storing on other agent call session control equipments in cluster under it or service call session control equipment, thereby make each agent call session control equipment or service call session control equipment can support the session of not initiating the subscriber from registering with it, thereby can support the session of being initiated by same subscriber's account by a plurality of agent call session control equipments or service call session control equipment, that is can support the mode of the user of collective (wholesale), simultaneously, because DNS can sort according to the actual loading of each IP when resolving domain name, therefore can preferentially select the less agent call session control equipment of load or service call session control equipment to carry out session operation, thereby realize the load balancing of each agent call session control equipment or service call session control equipment.And, according to the CSCF in the first cluster of the present invention and the second cluster, can adopt P2P agreement to carry out; Thereby connecting makes described the first cluster and the second cluster all have good extensibility.

Fig. 5 has illustrated according to the structural representation of a kind of agent call session control equipment managing for the session to IMS of the present invention.Agent call session control equipment according to the present invention comprises the first acquisition device 11, the first determining device 12, the second acquisition device 13.

With reference to Fig. 1 and Fig. 5, describe.Wherein, Fig. 1 has illustrated

When acting on behalf of call session control appliance, receive when inviting the message request of setting up session, the first acquisition device 11 extracts the equipment identification information of the equipment relevant with described session in this message request.

Preferably, when described message request is during from subscriber equipment, described the first acquisition device 11 further comprises the first sub-acquisition device (not shown).

The first sub-acquisition device extracts the equipment identification information as the subscriber equipment of calling party from described message request.

First with reference to Fig. 1 and Fig. 5, illustrate according to the first example of the present invention, when subscriber equipment 300 makes a call according to the first domain-name information corresponding with the first cluster, obtain a plurality of network address information of dns resolution the first domain-name information gained: P_IP1, P_IP2, P_IP3 and P_IP4, it corresponds respectively to the agent call session control equipment 101,102,103 and 104 in the first cluster.Subscriber equipment 300 is selected network address information P_IP1, and the message request sending for initiation session to the corresponding agent call session control equipment 101 of this network address information P_IP1.

Agent call session control equipment 101 receives after this message request from subscriber equipment 300, and the first sub-acquisition device of this agent call session control equipment 101 extracts the equipment identification information PUID_1 as the subscriber equipment 300 of calling party from " From " field of this message request head.

The first determining device 12 of agent call session control equipment, according to obtained equipment identification information, is determined the network address information of storing another agent call session control equipment of this equipment identification information in described the first cluster.

Particularly, described the first determining device 12, according to the corresponding relation of described equipment identification information and each agent call session control equipment, is determined the network address information of another the agent call session control equipment corresponding with the equipment identification information obtaining in the first acquisition device 11.

Continuation describes aforementioned the first example with reference to Fig. 1 and Fig. 5, the first determining device 12 of agent call session control equipment 101 adopts predetermined hash function to enter Hash to the equipment identification information PUID_1 of obtained subscriber equipment 300 and processes, to obtain cryptographic Hash Hash_2.Wherein, in agent call session control equipment 101, the concordance list of storage is as shown in table 5 below:

Table 5

The first determining device 12 of agent call session control equipment 101 is inquired about in the concordance list 5 of self, to obtain the network address information P_IP2 of another agent call session control equipment that stores PUID_1.

It should be noted that, determined another agent call session control equipment of the first determining device 12 of described agent call session control equipment can be both other agent call session control equipments, also can be himself affiliated agent call session control equipment.

Then, the second acquisition device 13 in agent call session control equipment obtains first log-on message corresponding with this equipment identification information from determined another agent call session control equipment.

Continuation describes aforementioned the first example with reference to Fig. 1 and Fig. 5, the second acquisition device 13 in agent call session control equipment 101, according to the determined network address information P_IP2 of the first determining device 12, obtains the first log-on message Reg_1 corresponding with the equipment identification information PUID_1 of subscriber equipment 300 from agent call session control equipment 102 corresponding to this network address information P_IP2.

It should be noted that, determined another agent call session control equipment of the first determining device 12 in acting on behalf of call session control appliance is during for agent call session control equipment under himself, and the second acquisition device 13 of this agent call session control equipment receives by carrying out interactive communication with determined this another agent call session control equipment the first log-on message that described equipment identification information that the latter sends is corresponding; And when determined another agent call session control equipment of the first determining device 12 is the agent call session control equipment under himself, a plurality of the first log-on messages that the second acquisition device 13 of described agent call session control equipment is directly stored from self, obtain first log-on message corresponding with described equipment identification information.

Preferably, when described message request is during from subscriber equipment, the second domain-name information that comprises the second cluster in the first log-on message that the second acquisition device 13 obtains, described agent call session control equipment also comprises the first address acquisition device (not shown) and the first dispensing device (not shown).

The first address acquisition device obtains a plurality of network address information corresponding with described the second domain-name information.

Particularly, described the first address acquisition device is to DNS request analysis the second domain-name information, and receives the network address information of a plurality of service call session control equipments in second cluster corresponding with the second domain-name information of resolving from DNS.

Continuation describes aforementioned the first example with reference to Fig. 1 and Fig. 5, the first address acquisition device of agent call session control equipment 101 is from the first log-on message being obtained by another agent call session control equipment 102, extract second domain-name information corresponding with the second cluster, then, the first address acquisition device of agent call session control equipment 101 is to this second domain-name information of DNS request analysis, and the network address information receiving from a plurality of service call session control equipments in the second cluster after dns resolution is respectively S_IP1, S_IP2, S_IP3 and S_IP4, it corresponds respectively to the service call session control equipment 201 in the second cluster, 202, 203 and 204.

The first dispensing device is selected a network address information in described a plurality of network addresss, and the service call session control equipment in its corresponding described second cluster sends this message request.

Continuation describes aforementioned the first example with reference to Fig. 1 and Fig. 5, the first dispensing device of agent call session control equipment 101 is selected network address information S_IP3 from four obtained network address information, and sends the message requests for initiation session to 203 in its corresponding second cluster.

In conjunction with Fig. 6, describe now.Fig. 6 has illustrated according to the structural representation of a kind of service call session control equipment managing for the session to IMS of the present invention.Service call session control equipment according to the present invention comprises the 3rd acquisition device 21, the second determining device 22, the 4th acquisition device 23.

When service call session control equipment receives when inviting the message request of setting up session, the 3rd acquisition device 21 of service call session control equipment extracts the equipment identification information of the equipment relevant with described session in this message request.

Preferably, when described message request is during from agent call session control equipment, the 4th sub-acquisition device (not shown) that the 3rd acquisition device 21 comprises is obtained the equipment identification information as the subscriber equipment of calling party from described message request.

With reference to Fig. 1 and Fig. 6, aforementioned the first example is proceeded to explanation, service call session control equipment 203 receives the message request from agent call session control equipment 101, and the 4th sub-acquisition device in its 3rd acquisition device 21 extracts the equipment identification information PUID_1 as the subscriber equipment 300 of calling party from " P-Asserted-Identity " or " From " field of the head of this message request.

Then, the second determining device 22 of service call session control equipment, according to obtained equipment identification information, is determined the network address information of storing another service call session control equipment of this equipment identification information in described the second cluster.

Particularly, the second determining device 22 of described service call session control equipment, according to the corresponding relation of described equipment identification information and each service call session control equipment, is carried out the network address information of another corresponding service call session control equipment of definite equipment identification information obtaining with the 4th sub-acquisition device.

Continuation describes aforementioned the first example with reference to Fig. 1 and Fig. 6, and the second determining device 22 in service call session control equipment 203 adopts predetermined hash function to enter Hash to the PUID_1 of obtained subscriber equipment 300 and processes, to obtain cryptographic Hash Hash_22.Wherein, in service call session control equipment 203, the concordance list of storage is as shown in table 6 below:

Table 6

Service call session control equipment 203 is inquired about in the concordance list 6 of self, to obtain the network address information S_IP2 of another service call session control equipment that stores PUID_1.

It should be noted that, determined another service call session control equipment of the second determining device 22 of described service call session control equipment can be other service call session control equipments, can be also the service call session control equipment under himself.

Then, the 4th acquisition device 23 of service call session control equipment obtains second log-on message corresponding with this equipment identification information from determined another service call session control equipment.

Continuation describes aforementioned the first example with reference to Fig. 1 and Fig. 6, the 4th acquisition device 23 of service call session control equipment 203, according to the determined network address information S_IP2 of the second determining device 22, obtains the second log-on message Reg_2 corresponding with the equipment identification information PUID_1 of subscriber equipment 300 from service call session control equipment 202 corresponding to this network address information S_IP2.

It should be noted that, when determined another service call session control equipment of the second determining device 22 of service call session control equipment is other service call session control equipments, the 4th acquisition device 23 of this service call session control equipment receives by carrying out interactive communication with this another service call session control equipment the second log-on message that described equipment identification information that the latter sends is corresponding; And when determined another service call session control equipment of its second determining device 22 is the service call session control equipment under himself, a plurality of the second log-on messages that the 4th acquisition device 23 of this service call session control equipment is directly stored from self, obtain second log-on message corresponding with described equipment identification information.

One of according to a preferred embodiment of the invention, service call session control equipment according to the present invention also comprises the 4th dispensing device (not shown).

When service call session control equipment obtains after the second log-on message, the 4th dispensing device of this service call session control equipment has been carried out and has been exhaled operation, and this message request is sent to and is exhaled network.

Particularly, described the 4th dispensing device is sent to query call session control equipment (I-CSCF by message request, Interrogating Call Session Control Function), this message request is sent to the called network corresponding with callee.

According to the solution of the present invention, each agent call session control equipment or service call session control equipment all can obtain the log-on message of storing on other agent call session control equipments in cluster under it or service call session control equipment, thereby make each agent call session control equipment or service call session control equipment can support the session of not initiating the subscriber from registering with it, thereby can support the session of being initiated by same subscriber's account by a plurality of agent call session control equipments or service call session control equipment, that is can support the mode of the user of collective (wholesale), simultaneously, because DNS can sort according to the actual loading of each IP when resolving domain name, therefore can preferentially select the less agent call session control equipment of load or service call session control equipment to carry out session operation, thereby realize the load balancing of each agent call session control equipment or each service call session control equipment.And, according to the CSCF in the first cluster of the present invention and the second cluster, can adopt P2P agreement to carry out; Thereby connecting makes described the first cluster and the second cluster all have good extensibility.

As another preferred embodiment of the present invention, according to the agent call session control equipment of the present embodiment, also comprise the 3rd determining device (not shown) and the first final controlling element (not shown); According to the service call session control equipment of the present embodiment, also comprise the 4th determining device (not shown) and the second final controlling element (not shown).

When acting on behalf of call session control appliance and receive the registration request relevant to subscriber equipment to be registered, the 3rd determining device of this agent call session control equipment, according to the equipment identification information of the subscriber equipment to be registered comprising in this registration request, is determined a network address information of acting on behalf of session control equipment should storing this equipment identification information in described the first cluster.

Wherein, the 3rd determining device of described agent call session control equipment is determined corresponding to subscriber equipment to be registered storing the agent call session control equipment of its first log-on message based on pre-defined rule.

For example, the first cluster of current I MS conversational system comprises 3 agent call session control equipment P1, P2, P3.Wherein, pre-defined rule is as shown in table 7 below:

Table 7

Continuation describes aforementioned the first example with reference to Fig. 1,4 agent call session control equipments in the first cluster are respectively according to the cryptographic Hash size of its network address information, determine the corresponding cryptographic Hash scope of each agent call session control equipment (wherein, Hash_IP1 < Hash_IP2 < Hash_IP3 < Hash_IP4) as shown in table 8 below:

Table 8

When user equipment (UE) _ 1 to be registered (not shown) is selected the agent call session control equipment 102 in the first cluster, and send registration request to it.The 3rd determining device in agent call session control equipment 102 is extracted the equipment identification information PUID_2 of user equipment (UE) _ 1 to be registered from obtained registration request, and adopt predetermined hash function to process, determine that the cryptographic Hash corresponding with equipment identification information PUID_2 is Hash_2, and, the 3rd determining device in agent call session control equipment 102 is determined Hash_IP2 < Hash_2 < Hash_IP3, the 3rd determining device in this agent call session control equipment 102 determines that equipment identification information PUID_2 should be stored in agent call session control equipment 103.

It should be noted that, another agent call session control equipment that the 3rd determining device of this agent call session control equipment is identified for storage device identification information can be both other agent call session control equipments, also can be himself affiliated agent call session control equipment.

Then, the first final controlling element in agent call session control equipment is carried out corresponding operating, so that determined this agent call session control equipment receives described registration request.

Particularly, described the first final controlling element is carried out corresponding operating so that the mode that determined this agent call session control equipment receives described registration request include but not limited to following any:

1) the first final controlling element of agent call session control equipment feeds back the network address information by the determined agent call session control equipment of its 3rd determining device to subscriber equipment to be registered, by this equipment of using to be registered, to the determined agent call session control equipment of the 3rd determining device, sends registration request.

Continuation describes aforementioned the first example with reference to Fig. 1, the 3rd determining device of agent call session control equipment 102 determines that current equipment identification information PUID_2 should be stored in agent call session control equipment 103, and the first final controlling element of this agent call session control equipment 102 is sent to user equipment (UE) _ 1 to be registered by the network address information P_IP3 of agent call session control equipment 103.User equipment (UE) _ 1, according to network address information P_IP3, sends registration request to agent call session control equipment 103.

2) the first final controlling element of agent call session control equipment is directly sent to registration request in the determined agent call session control equipment of its 3rd determining device.

Then, when the agent call session control equipment of the equipment identification information of, application memory to be registered equipment determined by the 3rd determining device receives the registration request of this equipment to be registered, this registration request is sent to I-CSCF, and the first domain-name information of the first cluster under this agent call session control equipment is contained in the header field of this registration request.

Then, when receiving the registration request relevant to subscriber equipment to be registered, the 4th determining device of service call session control equipment, according to the equipment identification information of the subscriber equipment to be registered in this registration request, is determined the network address information that should store a serving session control equipment of this equipment identification information in described the second cluster.

Wherein, the 4th determining device of service call session control equipment is according to the equipment identification information of the subscriber equipment to be registered in this registration request, determine that the mode of network address information of a serving session control equipment should storing this equipment identification information in described the second cluster and the 3rd determining device of aforementioned agent call session control equipment are according to the equipment identification information of the subscriber equipment to be registered in this registration request, determine and in described the first cluster, should store of this equipment identification information to act on behalf of the mode of network address information of session control equipment same or similar, do not repeat them here.

Then, the second final controlling element of service call session control equipment is carried out corresponding operating, so that determined this serving session control equipment receives described registration request.

Wherein, the second final controlling element of described service call session control equipment is carried out corresponding operating, so that receiving agent call session control equipment described in the first final controlling element of described registration request and aforementioned described agent call session control equipment, determined this serving session control equipment carries out corresponding operating, so that the method that determined this agent call session control equipment receives described registration request is same or similar, do not repeat them here.

Then, the second final controlling element of this service call session control equipment is determined, for the service call session control equipment of equipment identification information of storing equipment to be registered to home subscriber server (HSS, Home Subscriber Server) send the multimedia authentication request (MAR of the second domain-name information that comprises the second set, Multimedia-Auth-Request) and server-assignment request (SAR, Server-Assignment-Request).Then, this service call session control equipment is after receiving the feedback information of HSS, from creating corresponding the second log-on message as equipment identification information, the first domain-name information is contained in described the second log-on message, and sends to I-CSCF the confirmation that comprises the second domain-name information.

Query call session control equipment receives after the confirmation from service call session control equipment, by this confirmation be sent to the 3rd determining device of agent call session control equipment determined, for storing the service call session control equipment of the equipment identification information of equipment to be registered, this agent call session control equipment creates first log-on message corresponding with this subscriber equipment to be registered at self, and the second domain-name information in confirmation is contained in this first log-on message.

According to another preferred embodiment of the present invention, with reference to Fig. 3, wherein, according to agent call session control equipment of the present invention and service call session Application of control device in being exhaled network portion according to a kind of IMS conversational system of the present invention.

Exhaled in the stage, agent call session control equipment also comprises the second dispensing device (not shown), and the first acquisition device 11 of described agent call session control equipment further comprises the second sub-acquisition device (not shown); Service call session control equipment also comprises the second address acquisition device (not shown) and the 3rd dispensing device (not shown), and the 3rd acquisition device 21 of described service call session control equipment further comprises the 3rd sub-acquisition device (not shown).

Then,, when described message request is during from query call session control equipment, the 3rd sub-acquisition device of service call session control equipment obtains the equipment identification information as callee's subscriber equipment from described message request.

Particularly, described the 3rd sub-acquisition device obtains callee's equipment identification information from the predetermined field of head of message request.

Then, the 3rd sub-acquisition device of service call session control equipment 201 receives after the message request from this I-CSCF, in " Request URI " field of this message request, obtains the equipment identification information PUID_1 as callee's subscriber equipment.

Then, service call session control equipment obtains second log-on message corresponding with this equipment identification information by the second determining device 22 and the 4th acquisition device 23.Wherein, the first domain-name information that described the second log-on message comprises the first cluster.

Then, the second address acquisition device of service call session control equipment obtains a plurality of network address information corresponding with described the first domain-name information.

Particularly, the second address acquisition device of described service call session control equipment is to DNS request analysis the first domain-name information, and receives the network address information of a plurality of service call session control equipments in first cluster corresponding with the first domain-name information of resolving from DNS.

Continuation describes aforementioned the second example, the second determining device 22 of service call session control equipment 201 is determined the network address information S_IP2 of another service call session control equipment of storage device identification information PUID_1, and, the 4th acquisition device 23 of this service call session control equipment 201 obtains the second log-on message Reg_2 corresponding with this equipment identification information PUID_1 from the corresponding service call session control equipment 202 of network address information S_IP2, the second address acquisition device obtains first domain-name information corresponding with the first cluster from the second log-on message Reg_2.

Then, the second address acquisition device of service call session control equipment 201 is to this first domain-name information of DNS request analysis, and the network address information receiving from four agent call session control equipments in the first cluster after dns resolution is respectively P_IP1, P_IP2, P_IP3 and P_IP4, it corresponds respectively to the agent call session control equipment 101,102,103 and 104 in the first cluster.

The 3rd dispensing device of service call session control equipment is selected a network address information in described a plurality of network addresss, and the service call session control equipment in its corresponding described second cluster sends this message request.

Continuation describes aforementioned the second example with reference to Fig. 3 and Fig. 6, the 3rd dispensing device of service call session control equipment 201 is selected network address information P_IP3 from four obtained network address information, and the agent call session control equipment 103 in its corresponding first cluster sends the message request that is used for initiation session.

With reference to Fig. 3 and Fig. 5, when described message request is during from service call session control equipment, the second sub-acquisition device of agent call session control equipment extracts the equipment identification information as callee's subscriber equipment from described message request.

Continuation describes aforementioned the second example with reference to Fig. 3 and Fig. 5, agent call session control equipment 103 receives the message request from service call session control equipment 201, and its second sub-acquisition device for example obtains the equipment identification information PUID_1 as callee's subscriber equipment in " Request URI " by the field of this message request.

Then, agent call session control equipment, by the first determining device 12 and the second acquisition device 13, obtains corresponding equipment the first log-on message of equipment identification information obtaining with aforementioned the second sub-acquisition device.

Then,, after obtaining described the first log-on message, the second dispensing device of agent call session control equipment has been carried out and has been exhaled operation, and this message request is sent to the subscriber equipment corresponding with this equipment identification information.

Continuation describes aforementioned the second example with reference to Fig. 3 and Fig. 5, the first determining device 12 of agent call session control equipment 103 is determined the network address information P_IP2 of another service call session control equipment of storage device identification information PUID_1, and the second acquisition device 13 of agent call session control equipment 103 obtains the first log-on message Reg_1 corresponding with this equipment identification information PUID_1 from the corresponding agent call session control equipment 102 of network address information P_IP2.

Then, the second dispensing device of agent call session control equipment 103 sends message request to the subscriber equipment 300 as called party corresponding with this equipment identification information PUID_1.

According to the solution of the present invention, each agent call session control equipment or service call session control equipment all can obtain the log-on message of storing on other agent call session control equipments in cluster under it or service call session control equipment, thereby make each agent call session control equipment or service call session control equipment can support the session of not initiating the subscriber from registering with it, thereby can support the session of being initiated by same subscriber's account by a plurality of agent call session control equipments or service call session control equipment, that is can support the mode of the user of collective (wholesale), simultaneously, because DNS can sort according to the actual loading of each IP when resolving domain name, therefore can preferentially select the less agent call session control equipment of load or service call session control equipment to carry out session operation, thereby realize the load balancing of each agent call session control equipment or service call session control equipment.And, according to the CSCF in the first cluster of the present invention and the second cluster, can adopt P2P agreement to carry out; Thereby connecting makes described the first cluster and the second cluster all have good extensibility.

To those skilled in the art, obviously the invention is not restricted to the details of above-mentioned one exemplary embodiment, and in the situation that not deviating from spirit of the present invention or essential characteristic, can realize the present invention with other concrete form.Therefore, no matter from which point, all should regard embodiment as exemplary, and be nonrestrictive, scope of the present invention is limited by claims rather than above-mentioned explanation, is therefore intended to be included in the present invention dropping on the implication that is equal to important document of claim and all changes in scope.Any Reference numeral in claim should be considered as limiting related claim.In addition, obviously other unit or step do not got rid of in " comprising " word, and odd number is not got rid of plural number.A plurality of unit of stating in system claim or device also can be realized by software or hardware by a unit or device.The first, the second word such as grade is used for representing title, and does not represent any specific order.

Claims

In agent call session control equipment for the method that session manages to IMS, wherein, this agent call session control equipment belongs to the first cluster that comprises a plurality of agent call session control equipments, wherein, the method comprises:

A, when receiving when inviting the message request of setting up session, extracts the equipment identification information of the equipment relevant with described session in this message request;

B, according to obtained equipment identification information, determines the network address information of storing another agent call session control equipment of this equipment identification information in described the first cluster;

C obtains first log-on message corresponding with this equipment identification information from determined another agent call session control equipment.
2. method according to claim 1, wherein, described message request is from subscriber equipment, the second domain-name information that comprises the second cluster in described the first log-on message, described the second cluster comprises a plurality of service call session control equipments, and wherein, described step a comprises the following steps:

-from described message request, obtain the equipment identification information as the subscriber equipment of calling party;

Wherein, described method is further comprising the steps of:

-obtain a plurality of network address information corresponding with described the second domain-name information;

-in described a plurality of network addresss, select a network address information, and the service call session control equipment in its corresponding described second cluster sends this message request.
3. method according to claim 1, wherein, described message request is from service call session control equipment, and described step a comprises the following steps:

-from described message request, extract the equipment identification information as callee's subscriber equipment;

Wherein, described method is further comprising the steps of:

-after obtaining described the first log-on message, carried out and exhaled operation, and this message request has been sent to the subscriber equipment corresponding with this equipment identification information.
4. according to the method in any one of claims 1 to 3, wherein, described method is further comprising the steps of:

-when receiving the registration request relevant to subscriber equipment to be registered, according to the equipment identification information of the subscriber equipment to be registered comprising in this registration request, determine a network address information of acting on behalf of session control equipment should storing this equipment identification information in described the first cluster;

-carry out corresponding operating, so that determined this agent call session control equipment receives described registration request.
In service call session control equipment for the method that session manages to IMS, described service call session control equipment belongs to the second cluster that comprises a plurality of service call session control equipments, wherein, the method comprises:

A, when receiving when inviting the message request of setting up session, extracts the equipment identification information of the equipment relevant with described session in this message request;

B, according to obtained equipment identification information, determines the network address information of storing another service call session control equipment of this equipment identification information in described the second cluster;

C obtains second log-on message corresponding with this equipment identification information from determined another service call session control equipment.
6. method according to claim 5, wherein, described message request, from query call session control equipment, comprises the first domain-name information of the first cluster in described the second log-on message, and described the first cluster comprises a plurality of agent call session control equipments; Wherein, described steps A comprises the following steps:

-from described message request, obtain the equipment identification information as callee's subscriber equipment;

Wherein, described method is further comprising the steps of:

-obtain a plurality of network address information corresponding with described the first domain-name information;

-from described a plurality of network addresss, select a network address information, and the agent call session control equipment in its corresponding described first cluster sends this message request.
7. method according to claim 5, wherein, described message request is from agent call session control equipment, and described steps A comprises the following steps:

-from described message request, obtain the equipment identification information as the subscriber equipment of calling party;

Wherein, described method is further comprising the steps of:

-after obtaining described the second log-on message, carried out and exhaled operation, and this message request is sent to and is exhaled network.
8. according to the method described in any one in claim 5 to 7, wherein, described method is further comprising the steps of:

-when receiving the registration request relevant to subscriber equipment to be registered, according to the equipment identification information of the subscriber equipment to be registered in this registration request, determine the network address information that should store a serving session control equipment of this equipment identification information in described the second cluster;

-carry out corresponding operating, so that determined this serving session control equipment receives described registration request.
9. the agent call session control equipment managing for the session to IMS, wherein, described agent call session control equipment belongs to and comprises a plurality of the first clusters of acting on behalf of session control equipment, and wherein, described agent call session control equipment comprises:

The first acquisition device for when receiving when inviting the message request of setting up session, extracts the equipment identification information of the equipment relevant with described session in this message request;

The first determining device, for according to obtained equipment identification information, determines the network address information of storing another agent call session control equipment of this equipment identification information in described the first cluster;

The second acquisition device, for obtaining first log-on message corresponding with this equipment identification information from determined another agent call session control equipment.
10. agent call session control equipment according to claim 9, comprises the second domain-name information of the second cluster in wherein said the first log-on message, described the second cluster comprises a plurality of serving session control equipment, and wherein, described the first acquisition device also comprises:

The first sub-acquisition device for when described message request is during from subscriber equipment, obtains the equipment identification information of this subscriber equipment making a call from described message request,

Wherein, described agent call session control equipment also comprises:

The first address acquisition device, for obtaining a plurality of network address information corresponding with described the second domain-name information;

The first dispensing device, for selecting a network address information by described a plurality of network addresss, and the service call session control equipment in its corresponding described second cluster sends this message request.
11. agent call session control equipments according to claim 9, wherein, described message request is from service call session control equipment, and wherein, described acquisition device also comprises:

The second sub-acquisition device, for extracting the equipment identification information as callee's subscriber equipment from described message request;

Wherein, described agent call session control equipment also comprises:

The second dispensing device, for after obtaining described the first log-on message, has carried out and has exhaled operation, and this message request has been sent to the subscriber equipment corresponding with this equipment identification information.
12. 1 kinds of service call session control equipments that manage for the session to IMS, described first service call session control appliance belongs to the second cluster consisting of a plurality of service call session control equipments, and wherein, described service call session control equipment comprises:

The 3rd acquisition device for when receiving when inviting the message request of setting up session, extracts the equipment identification information of the equipment relevant with described session in this message request;

The second determining device, for according to obtained equipment identification information, determines the network address information of storing another service call session control equipment of this equipment identification information in described the second cluster;

The 4th acquisition device, for obtaining second log-on message corresponding with this equipment identification information from determined another service call session control equipment.
13. service call session control equipments according to claim 12, wherein, described message request, from query call session control equipment, comprises the first domain-name information of the first cluster in described the second log-on message, described the first cluster comprises a plurality of agent call session control equipments; Wherein, described the 3rd acquisition device comprises:

The 3rd sub-acquisition device, for obtaining the equipment identification information as callee's subscriber equipment from described message request;

Wherein, described service call session control equipment also comprises:

The second address acquisition device, for obtaining a plurality of network address information corresponding with described the first domain-name information;

The 3rd dispensing device, for selecting a network address information from described a plurality of network addresss, and the agent call session control equipment in its corresponding described first cluster sends this message request.
14. service call session control equipments according to claim 12, wherein, described message request is from agent call session control equipment, and wherein, described the 3rd acquisition device comprises:

The 4th sub-acquisition device, for obtaining the equipment identification information as the subscriber equipment of calling party from described message request;

The 4th dispensing device, for after obtaining described the second log-on message, has carried out and has exhaled operation, and this message request is sent to and is exhaled network.
15. 1 kinds of IMS conversational systems, wherein, described system comprises the first cluster and the second cluster, wherein, described the first cluster comprises a plurality of agent call session control equipments as described in any one in claim 9 to 11, and described the second cluster comprises a plurality of service call session control equipments as described in any one in claim 12 to 14.