CN102148739A - IMS (IP (Internet Protocol) Multimedia Subsystem) session routing control method and system - Google Patents

IMS (IP (Internet Protocol) Multimedia Subsystem) session routing control method and system Download PDF

Info

Publication number
CN102148739A
CN102148739A CN2010101071843A CN201010107184A CN102148739A CN 102148739 A CN102148739 A CN 102148739A CN 2010101071843 A CN2010101071843 A CN 2010101071843A CN 201010107184 A CN201010107184 A CN 201010107184A CN 102148739 A CN102148739 A CN 102148739A
Authority
CN
China
Prior art keywords
user
control node
cscf
registration
node
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN2010101071843A
Other languages
Chinese (zh)
Other versions
CN102148739B (en
Inventor
房秉毅
张云勇
马少武
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China United Network Communications Group Co Ltd
Original Assignee
China United Network Communications Group Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China United Network Communications Group Co Ltd filed Critical China United Network Communications Group Co Ltd
Priority to CN201010107184.3A priority Critical patent/CN102148739B/en
Publication of CN102148739A publication Critical patent/CN102148739A/en
Application granted granted Critical
Publication of CN102148739B publication Critical patent/CN102148739B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Abstract

The invention relates to an IMS (IP (Internet Protocol) Multimedia Subsystem) session routing control method and system. The control method comprises the following steps of: (1) selecting a set number of control nodes in a control node group as access nodes; (2) accessing the control node group by executing the access nodes of P-CSCF (Proxy-Call Session Control Function) and registering on one or more control nodes in the control node group by a user; (3) establishing a session with a callee through one of the control nodes registered by the user, wherein when the communication is carried out by using an SIP (Session Initiation Protocol) protocol, each control node in the control node group routes the hash key value of a registering request or a session request sent by the user to the next control node for processing the registering request or the session request according to a Chord algorithm. The session control function is completed by adopting functional entities, such as P/S-CSCF (Proxy/Serving-Call Session Control Function), HSS (Home Subscriber Server), and the like, the IMS infrastructure can be simplified by combining with a P2P (Peer-To-Peer) technology, the session control function is realized by utilizing the combination of a DHT (Distributed Hash Table) algorithm and the SIP, the load balance problem in the IMS can be effectively solved and the system reliability is improved.

Description

A kind of IMS session route control method and system
Technical field
The present invention relates to moving communicating field, relate in particular to a kind of IMS session route control method and system.
Background technology
31-35 page or leaf at " telecommunications science " magazine in February, 2008 discloses " a kind of novel distributed IMS implementation method ", this technical scheme provides a kind of and has realized distributed structure/architecture based on the P2P mode, to the processing that homogenizes of IMS (IP multimedia system) network element, improve extensibility and the reliability of IMS by P2P (point-to-point) technology.Adopt the distributed IMS framework of P2P over SIP (moving P2P on session initiation protocol), promptly IMS over SIP (moving P2P on IMS) utilizes the P2P technology that 5 kinds of functional entitys among the IMS are organized together.Here involved functional entity comprises: P-CSCF (ProxyCall Session Control Function, Proxy Call Session Control Function), S-CSCF (Serving CallSession Control Function, service call conversation control function), HSS (Home SubscriberServer, home subscriber server), MRF (Media Resource Function, media resource function) and AS (Application Server, application server) etc.(DistributedHash Table, DHT) framework substitutes existing server centered control architecture, improves the reliability of system based on distributed hashtable in employing.
In the distributed IMS framework, each super node (SuperNode) all comprises two class functions: based on the HSS function of DHT with based on the conversation control function of SIP.Based on the conversation control function of SIP comprise P-CSCF can and the S-CSCF function, P-CSCF is linked into entrance in the system for the user agent, S-CSCF plays the part of the role of ownership place session control.Functional entity basically identical in the function of P-CSCF and S-CSCF and the 3GPP IMS network, but the two can be integrated in a physical entity with the HSS function based on DHT, make the function of network control layer to homogenize, simultaneously, user signing contract information in the distributed IMS system is stored among the HSS based on DHT, use the SuperNode at the quick consumer positioning of DHT algorithm place, optimize the route of network, its system configuration as shown in Figure 1.
When the user contracts, based on the HSS system of DHT according to user ID, can be IMPU (user open identity) or other user ID, by the SuperNode of DHT consumer positioning ownership, user-dependent information stores in the SuperNode of correspondence.In user's registration, the conversation procedure, SuperNode can be routed to the SuperNode that the user belongs to conversation request message, finishes functions such as registration, session control, professional triggering on the SuperNode that the user belonged to.
In the process that the user makes a call, similar in the processing mode of SIP session and the IMS system, but the route of different sessions does not re-use I-CSCF and HSS finishes, but adopt HSS to finish based on DHT.Initiating a session request to user agent B with user agent A is example, in the session flow process of distributed IMS system as shown in Figure 2:
Step 201, user agent A sets up session to the SuperNode1 request that inserts.
Step 202, SuperNode1 carries out the P-CSCF function after receiving that request is set up in the session of user agent A, according to the binding relationship of determining in the registration process, conversation request is routed on the SuperNode2 of calling subscriber's ownership.
Step 203, on SuperNode2, SuperNode2 can discern the conversation request of conversation request for the own user who is controlled, and carries out the S-CSCF function, finishes professional triggering and control.After carrying out the S-CSCF function, SuperNode2 is to the position based on the HSS function request called subscriber's of DHT S-CSCF function place.
Step 204, the information according to HSS in the step 203 returns is routed to the SuperNode3 that user B is belonged to conversation request.
Step 205, SuperNode3 carries out the S-CSCF function of callee side, finish professional triggering and control after, conversation request is routed to the super node SuperNode6 of the current access of called subscriber.
Step 206, SuperNode6 is forwarded to the called subscriber to conversation request and acts on behalf of B.
Above-mentioned technical scheme adopts distributed storage to user data, solve routing inquiry problem in the conversation procedure by HSS system based on DHT, by the DHT algorithm the original HSS system that concentrates in the IMS network is distributed on each SuperNode in the system equably, and the telecom operation environment is a multi-network environment at present, concerning unified user data, except satisfying in the next generation network framework each control and business network element for the demand of user data, also need to satisfy demand, be unfavorable for the management of user data like this user data management.Though prior art HSS function, P-CSCF and S-CSCF function distributing in an entity, the bottom of HSS uses the DHT technology to search and store data, utilize the distribution of storage of subscriber data, realize the route control of session signaling, prerequisite is the DHTization of user data, shortcoming is that data are too disperseed, and is unfavorable for centralized management.Though route control method of the prior art can reach the problem that solves load balancing to a certain extent, but because it distributes load in advance, can't dynamically control, so still need further to seek to solve the technical scheme of load balancing the load of each Control Node.
Summary of the invention
In order to solve above-mentioned technical problem, a kind of IMS session route control method is provided, its purpose is, simplifies the IMS framework, solves the problem of load balancing among the IMS.
The invention provides a kind of IMS session route control method, comprising:
Step 1 selects the Control Node of specific quantity as access node in the Control Node group;
Step 2, the user is by the access node access control node cluster of execution P-CSCF, and one or more Control Node in the Control Node group are registered;
Step 3, the user sets up session by one in the Control Node of its registration with the callee;
Wherein, each Control Node is when using Session Initiation Protocol to communicate among the Control Node group, and register requirement or conversation request Hash key assignments that Control Node sends the user are routed to next Control Node of handling this register requirement or conversation request according to the Chord algorithm.
In the step 2, the Control Node of carrying out P-CSCF for this user is key assignments of registration request from user Hash, and finds the Control Node of carrying out S-CSCF for this user according to the Chord routing algorithm, register requirement sent to this Control Node finish registration.
Step 2 comprises:
Step 21, the user initiates register requirement, and by behind the access node access control node cluster of carrying out P-CSCF, access node is judged according to predetermined strategy can be this user's service, then find the Control Node of carrying out S-CSCF and accepting this user's registration with key assignments of register requirement Hash and according to the Chord routing algorithm, register requirement is sent to this Control Node finish registration, otherwise execution in step 22;
Step 22, the access node of carrying out P-CSCF finds the Control Node that can carry out P-CSCF for this user with key assignments of register requirement Hash and according to the Chord routing algorithm, and register requirement is sent to this Control Node; This Control Node finds the Control Node of carrying out S-CSCF and accepting this user's registration with key assignments of register requirement Hash and according to the Chord routing algorithm, register requirement is sent to this Control Node finish registration.
In the step 3, the Control Node of carrying out P-CSCF for this user finds the Control Node of this user's registration according to user's conversation request, and user's conversation request is sent to the Control Node of this user's registration, the Control Node of this user's registration is carried out S-CSCF for this user, the called party address that comprises in the conversation request according to the user, obtain carrying out the Control Node address of S-CSCF for the callee from HSS, and user's conversation request being sent the Control Node that callee most carries out S-CSCF according to this address, the Control Node of carrying out S-CSCF for the callee is forwarded to the callee with user's conversation request.
Step 3 comprises:
Step 31, after access node receives user's conversation request, judge to be that this user serves according to predetermined strategy, then find the Control Node of this user's registration according to user's conversation request, and user's conversation request is sent to the Control Node of this user's registration, the Control Node of this user's registration is carried out S-CSCF for this user, the called party address that comprises in the conversation request according to the user obtains carrying out for the callee Control Node address of S-CSCF from HSS, and user's conversation request being sent the Control Node that callee most carries out S-CSCF according to this address, the Control Node of carrying out S-CSCF for the callee is forwarded to the callee with user's conversation request; Access node is judged according to predetermined strategy can not be this user's service, and then execution in step 32;
Step 32, access node finds the Control Node that can carry out P-CSCF for this user with key assignments of conversation request Hash of user and according to the Chord routing algorithm, and user's conversation request is sent to this Control Node; This Control Node finds the Control Node of this user's registration according to user's conversation request, and user's conversation request is sent to the Control Node of this user's registration, the Control Node of this user's registration is carried out S-CSCF for this user, the called party address that comprises in the conversation request according to the user obtains carrying out for the callee Control Node address of S-CSCF from HSS, and user's conversation request being sent the Control Node that callee most carries out S-CSCF according to this address, the Control Node of carrying out S-CSCF for the callee is forwarded to the callee with user's conversation request.
If there is more than one HSS:
In step 21 or the step 22, the Control Node of carrying out S-CSCF and accepting this user's registration also obtains a key assignments by Hash DX_SLF_QUERY message, find the Control Node of carrying out SLF according to this key assignments, carry out S-CSCF and accept the address of the Control Node of this user's registration to the Control Node request HSS that carries out SLF; After receiving the address of HSS from the Control Node of carrying out SLF, the Control Node HSS corresponding with this address that carries out S-CSCF and accept this user's registration communicates by letter, and finishes user's registration.
If there is more than one HSS:
In step 31 or the step 32, the Control Node of this user's registration also Hash DX_SLF_QUERY message obtains a key assignments, finds the Control Node of carrying out SLF according to this key assignments, and the Control Node of this user's registration is to the address of the Control Node request HSS that carries out SLF; After receiving the address of HSS from the Control Node of carrying out SLF, the called party address that comprises in the conversation request of Control Node according to the user of this user's registration obtains carrying out for the callee Control Node address of S-CSCF from the HSS of the address correspondence of this HSS.
The invention provides a kind of IMS session route control system, comprise the Control Node group, the Control Node of specific quantity is as access node;
Access node is used to carry out P-CSCF for the user access control node cluster;
Control Node among the Control Node group also is used for the user and registers after by access node access control node cluster;
The Control Node of user's registration is used for setting up session for user and callee;
Wherein, each Control Node is when using Session Initiation Protocol to communicate among the Control Node group, and register requirement or conversation request Hash key assignments that Control Node sends the user are routed to next Control Node of handling this register requirement or conversation request according to the Chord algorithm.
For the user carries out the Control Node of P-CSCF, be used for key assignments of registration request from user Hash, and find the Control Node of carrying out S-CSCF for this user according to the Chord routing algorithm, register requirement is sent to this Control Node finish registration.
Access node is used for when it can be served for this user according to the predetermined strategy judgement, directly finds the Control Node of carrying out S-CSCF and accepting this user's registration with key assignments of register requirement Hash and according to the Chord routing algorithm; When it can not be served for this user according to the predetermined strategy judgement, find the Control Node that can carry out P-CSCF for this user with key assignments of register requirement Hash and according to the Chord routing algorithm, this Control Node finds key of register requirement Hash the Control Node of carrying out S-CSCF and accepting this user's registration again.
Carry out the Control Node of P-CSCF, be used for finding the Control Node of this user's registration according to user's conversation request, and user's conversation request is sent to the Control Node of this user's registration, the Control Node of this user's registration is carried out S-CSCF for this user, the called party address that comprises in the conversation request according to the user, obtain carrying out the Control Node address of S-CSCF for the callee from HSS, and user's conversation request being sent the Control Node that callee most carries out S-CSCF according to this address, the Control Node of carrying out S-CSCF for the callee is forwarded to the callee with user's conversation request.
Access node is used for directly finding the Control Node of this user's registration according to user's conversation request when it can be served for this user according to the predetermined strategy judgement, and user's conversation request is sent to the Control Node of this user's registration; When it can not be served for this user according to the predetermined strategy judgement, find the Control Node that to carry out P-CSCF for this user with key assignments of conversation request Hash of user and according to the Chord routing algorithm, and user's conversation request is sent to this Control Node, this Control Node finds the Control Node of this user's registration according to user's conversation request, and user's conversation request is sent to the Control Node of this user's registration.
If there is more than one HSS:
Carry out S-CSCF and accept the Control Node that this user registers, also be used for Hash DX_SLF_QUERY message and obtain a key assignments, find the Control Node of carrying out SLF according to this key assignments, carry out S-CSCF and accept the address of the Control Node of this user's registration to the Control Node request HSS that carries out SLF; After receiving the address of HSS from the Control Node of carrying out SLF, the Control Node HSS corresponding with this address that carries out S-CSCF and accept this user's registration communicates by letter, and finishes user's registration.
If there is more than one HSS:
The Control Node of this user's registration also is used for obtaining a key assignments by Hash DX_SLF_QUERY message, finds the Control Node of carrying out SLF according to this key assignments, and the Control Node of this user's registration is to the address of the Control Node request HSS that carries out SLF; After receiving the address of HSS from the Control Node of carrying out SLF, the called party address that comprises in the conversation request of Control Node according to the user of this user's registration obtains carrying out for the callee Control Node address of S-CSCF from the HSS of the address correspondence of this HSS.
Among the present invention, adopt functional entitys such as P/S-CSCF, HSS to finish conversation control function in the IMS network, can simplify the IMS framework in conjunction with the P2P technology, utilize DHT algorithm and SIP in conjunction with realizing conversation control function simultaneously, can effectively solve the problem of load balancing among the IMS, improve the reliability and the extensibility of system; The present invention simultaneously also helps telecom operators data is managed concentratedly.
Description of drawings
Fig. 1 is the realization system of IMS session route in the prior art;
Fig. 2 is the realization flow of IMS session route in the prior art;
Fig. 3 is the register flow path of UE in the IMS session route control system provided by the invention;
Fig. 4 sets up flow process for the session of UE in the IMS session route control system provided by the invention.
Embodiment
Among the present invention, each CN (Control Node) group can be provided with some access nodes according to principles such as geographical position, and when UE (subscriber equipment) inserts the CN group time for the first time, UE need insert by access node.Can there be following two kinds of UE to obtain the method for CN group and access node address thereof.CN group is made up of a plurality of CN.Each CN Control Node comprises the function of P-CSCF, S-CSCF, SLF (SubscriptionLocator Function, signatory position functions) and MRF, these four kinds of functions common an integrated physical entity, i.e. CN node.
First kind is that UE obtains from Access Network.At this moment, SIP URI of all access nodes of CN group (user resources identifier) and IP address thereof are stored in PDF (Policy Decision Function, the strategy decisive function) entity.When needs access CN group time, UE obtains the binding information of access node SIP URI and IP address by the PDF functional entity.UE based on context internal mechanism such as perception information selects suitable access node to insert CN group.
The second way is access node SIP URI and the IP address that obtains CN group by DHCP/DNS mechanism.UE at first sends DHCP and asks to Dynamic Host Configuration Protocol server.Dynamic Host Configuration Protocol server sends dhcp reply message, tells the local CN group's access node of UE SIP URI, and tells the IP address of UE dns server.Subsequently, UE sends the DNS request message to the IP address of dns server with acquisition CN group access node.UE based on context internal mechanism such as perception information selects suitable access node to insert CN group.
A group can be provided with a plurality of access points, access point position generally is provided with according to region and access customer number order, and network can dynamically be adjusted the number of access node in the CN group according to network condition, this has just effectively been avoided occurring the situation of indivedual access node overloads, for example can adjust the access point number according to the health status of offered load situation or node, this mainly is to adjust according to the strategy of operator.When certain CN peer node is set to access node, its can send to PDF functional entity in the network, Dynamic Host Configuration Protocol server, dns server to the binding of relevant informations such as its SIP URI and IP address and other need know the node of these information.Simultaneously, it is an access node by its state of other access nodes in the multicast form notice group.In this system architecture, each access node is all preserved one with other access node tabulations in the group.
Under the poorest situation, login request message can't be handled and transmit to the P-CSCF access node that UE selects possibly, at this moment, it can select another P-CSCF substitute access node for UE according to the access node tabulation that it stores, perhaps operator lays a fixing P-CSCF as access point, on total energy connects when guaranteeing to insert for the first time.At this moment, transmit login request message to the P-CSCF access node of substituting.Guaranteed that like this UE can not find to insert any fault of appearance.This pattern had both been saved because reselect time delay and the bandwidth occupancy that access node brings, and had improved satisfaction and the robustness of UE to network insertion again.
The register flow path of UE is wherein represented the function of using this moment as shown in Figure 3 inside each CN entity parantheses, comprising:
Step 301, UE inserts the access node CN1 that the CN cluster is connected to CN group earlier for the first time.
Step 302, after access node is received the register requirement (SIP REGISTER) of UE, judge earlier whether CN1 has the ability to be the UE service, if busy (busy is the strategy of operator's definition, such as the load of CN1 reached its rated load 80%), according to the Chord routing algorithm, key assignments of register requirement Hash for this reason, and transmit this register requirement and give second selected CN peer node CN2, we claim it be the substitute CN service peer node that inserts the CN node (principle of selecting CN2 be the key assignments of CN2 correspondence and CN1 the key assignments of register requirement Hash is the most approaching for this reason, but less than the CN1 key assignments of register requirement Hash for this reason).The forwarding of this register requirement is CN group's a internal act, does not need external node to know.In this process, UE can't perceive the CN service peer node access failure that inserts for the first time, does not also need initiatively to obtain once more any access CN nodal information.
If not inserting for the first time this CN group, can carry the SIP URI binding information of CN group's access service peer node in the register requirement that UE sends.UE can directly send this register requirement to this CN service peer node.If this moment, this CN service peer node was too busy, it can be key assignments of this register requirement Hash, temporarily this register requirement is transmitted to other CN peer node and handles.The forwarding of this register requirement is group's a internal act, does not need external node to know.
Step 303, after CN substitute service peer node CN2 receives the register requirement SIPREGISTER of UE transmission, carry out the P-CSCF function, it is key assignments of register requirement Hash for this reason, by the Chord routing algorithm, find purpose CN peer node CN3 for the service of this register requirement (principle of selecting CN3 be key assignments and the CN2 of CN3 correspondence the key assignments of register requirement Hash is the most approaching for this reason, but less than the CN2 key assignments of register requirement Hash for this reason), CN3 node execution S-CSCF function.Realized the route control of IMS in step 303, having substituted the load-balancing function of I-CSCF by this sip message routing mechanism based on DHT.
Step 304, when the CN3 node is received this register requirement, carry out the S-CSCF function, need get in touch with HSS, the download verify data is finished the authentication to UE, in HSS, preserve the URI of this CN3 simultaneously, when same user will return the routing iinformation that points to this CN3, i.e. this S-CSCF function to any further inquiry of HSS.
If a plurality of HSS servers are arranged in the network, CN3 need pass through the SIP URI that SLF (Subscription LocatorFunction, signatory position functions) obtains HSS.CN3 obtains a key assignments by Hash DX_SLF_QUERY message, by the Chord routing algorithm, finds with key assignments the most approachingly but less than first node of this key assignments, be the CN4 node, and the CN3 node sends DX_SLF_QUERY message to the CN4 node.The CN4 node is carried out the SLF function then.Form the CN group time at CN, adopt the Chord routing algorithm to organize, according to the Chord routing algorithm, each peer node is preserved a Chord tabulation, is called the finger tabulation.The SIP URI address of each CN peer node can be mapped as a corresponding key assignments.
If have only a HSS in this network, then do not need the SLF function.
Step 305, CN4 node are carried out the SLF function, by sending DX_SLF_RESP message, inform the SIP URI of its required acquisition HSS of CN3 node.
Step 306 behind the HSS access node address that CN3 obtains, sends Diameter multimedia login request message (Diameter Multimedia AuthenticationRequest, a MAR) message by Cx interface to HSS.Comprise in this message: the SIP URI of public subscriber identification IMPU, private user identity IMPI and CN3 etc., wherein public subscriber identification IMPU, private user identity IMPI come from registration request from user.
Step 307, HSS stores the URI of CN3 in user data, and (Diameter Multimedia Authentication Answer, MAA) message is given the CN3 node to reply a Diameter multimedia responsion message.The relevant information that comprises the user in this message, the S-CSCF function of CN3 node is come authenticated user with the data that HSS provides, the storage user related information.
Step 308, then, the S-CSCF function of CN3 node is created a SIP 401 (without permission) challenge responses and is given UE through CN2, CN1, and this response comprises an inquiry (Challenge) that requires UE to reply in WWW-Authenticate byte section.
Step 309, CN3 receives that the user through the REGISTER of the qualification authentication of CN1, CN2 transmission request, carries out the S-CSCF function and sends a Diameter SAR message to HSS, the present registered and download user archives of notice HSS user, HSS replys SAA message.
Step 310 when the S-CSCF of CN3 function receives that HSS replys, means this time and succeeds in registration.The CN3 node sends 200OK message by CN2, CN1 node and confirms to succeed in registration to UE.
After succeeding in registration, this CN3 node becomes the fixing S-CSCF function service node of UE for this reason.In the service process in future, if the S-CSCF function of this node is because the UE service for this reason temporarily of disposal ability or other reasons, it can be after the register requirement of UE transmission Hash again, and other peer node of utilizing the Chord algorithm to be transmitted to CN group are handled.The temporary transient transfer of this service does not need UE to know.UE can't perceive the transfer of this service, has effectively guaranteed the service quality that UE experiences, and certain limit has reduced because the service time-delay that ability or network failure bring.After the P-CSCF of CN2 node function is received 200OK message, need storage and insert the relevant information of local network, make things convenient for the access service of back.After the UE registration, CN2 and CN3 node that UE can select to fix are its service.Break down when the function that needs maybe can't be provided when them, allow in CN group, to utilize the DHT algorithm to realize the control of session route, realize the transfer of function.
The UE session is set up flow process as shown in Figure 4, comprising:
Step 401, user A is connected to access node CN1.
After step 402, access node are received the conversation request (INVITE) of UE, judge earlier whether CN1 has the ability to be the UE service, if it is busy, according to the Chord routing algorithm, key assignments of conversation request Hash for this reason again, and transmit this conversation request and give second selected CN peer node CN2.The address that comprises the called subscriber in the INVITE request.
Step 403 after CN substitute service peer node CN2 receives the conversation request that UE sends, is carried out the P-CSCF function, and the CN3 of appointment when the session request is transmitted to registration carries out the S-CSCF function.
Step 404 when the CN3 node is received this conversation request, is carried out the S-CSCF function, need get in touch with HSS, obtains to provide for the callee CN node of S-CSCF function service.
Suppose to have only in the network HSS, just do not need the SLF function,, just need the SLF function, the control method of session route such as register flow path if having a plurality ofly.
CN3 carries out the S-CSCF function and sends Diameter LIR (Location-Information-Request) message to HSS.Comprising the called subscriber address.
Step 405, HSS receives Diameter LIR request, check that the public identifier property value is to (Public-Identify AVP), seek the data that interrelate with the user, obtain the CN4 node address of the execution S-CSCF function of callee's storage, and return LIA (Location-Information-Answer) message.
Step 406, CN3 sends to dispensing called subscriber's CN4 node to the INVITE request.
Step 407, CN4 carries out the S-CSCF function of callee side, after the business of finishing triggers and controls, conversation request is routed to the CN6 node of the current access of called subscriber.
Step 408, the CN6 node is forwarded to called subscriber B to conversation request.
The present invention also provides a kind of IMS session route control system, comprises the Control Node group, and the Control Node of specific quantity is as access node; Access node is used to carry out P-CSCF for the user access control node cluster; Control Node among the Control Node group also is used for the user and registers after by access node access control node cluster; The Control Node of user's registration is used for setting up session for user and callee; Wherein, each Control Node is when using Session Initiation Protocol to communicate among the Control Node group, and register requirement or conversation request Hash key assignments that Control Node sends the user are routed to next Control Node of handling this register requirement or conversation request according to the Chord algorithm.
Those skilled in the art can also carry out various modifications to above content under the condition that does not break away from the definite the spirit and scope of the present invention of claims.Therefore scope of the present invention is not limited in above explanation, but determine by the scope of claims.

Claims (14)

1. an IMS session route control method is characterized in that, comprising:
Step 1 selects the Control Node of specific quantity as access node in the Control Node group;
Step 2, the user is by the access node access control node cluster of execution P-CSCF, and one or more Control Node in the Control Node group are registered;
Step 3, the user sets up session by one in the Control Node of its registration with the callee;
Wherein, each Control Node is when using Session Initiation Protocol to communicate among the Control Node group, and register requirement or conversation request Hash key assignments that Control Node sends the user are routed to next Control Node of handling this register requirement or conversation request according to the Chord algorithm.
2. IMS session route control method as claimed in claim 1, it is characterized in that, in the step 2, the Control Node of carrying out P-CSCF for this user is with key assignments of registration request from user Hash, and find the Control Node of carrying out S-CSCF for this user according to the Chord routing algorithm, register requirement is sent to this Control Node finish registration.
3. IMS session route control method as claimed in claim 2 is characterized in that step 2 comprises:
Step 21, the user initiates register requirement, and by behind the access node access control node cluster of carrying out P-CSCF, access node is judged according to predetermined strategy can be this user's service, then find the Control Node of carrying out S-CSCF and accepting this user's registration with key assignments of register requirement Hash and according to the Chord routing algorithm, register requirement is sent to this Control Node finish registration, otherwise execution in step 22;
Step 22, the access node of carrying out P-CSCF finds the Control Node that can carry out P-CSCF for this user with key assignments of register requirement Hash and according to the Chord routing algorithm, and register requirement is sent to this Control Node; This Control Node finds the Control Node of carrying out S-CSCF and accepting this user's registration with key assignments of register requirement Hash and according to the Chord routing algorithm, register requirement is sent to this Control Node finish registration.
4. IMS session route control method as claimed in claim 1, it is characterized in that, in the step 3, the Control Node of carrying out P-CSCF for this user finds the Control Node of this user's registration according to user's conversation request, and user's conversation request is sent to the Control Node of this user's registration, the Control Node of this user's registration is carried out S-CSCF for this user, the called party address that comprises in the conversation request according to the user, obtain carrying out the Control Node address of S-CSCF for the callee from HSS, and user's conversation request being sent the Control Node that callee most carries out S-CSCF according to this address, the Control Node of carrying out S-CSCF for the callee is forwarded to the callee with user's conversation request.
5. IMS session route control method as claimed in claim 4 is characterized in that step 3 comprises:
Step 31, after access node receives user's conversation request, judge to be that this user serves according to predetermined strategy, then find the Control Node of this user's registration according to user's conversation request, and user's conversation request is sent to the Control Node of this user's registration, the Control Node of this user's registration is carried out S-CSCF for this user, the called party address that comprises in the conversation request according to the user obtains carrying out for the callee Control Node address of S-CSCF from HSS, and user's conversation request being sent the Control Node that callee most carries out S-CSCF according to this address, the Control Node of carrying out S-CSCF for the callee is forwarded to the callee with user's conversation request; Access node is judged according to predetermined strategy can not be this user's service, and then execution in step 32;
Step 32, access node finds the Control Node that can carry out P-CSCF for this user with key assignments of conversation request Hash of user and according to the Chord routing algorithm, and user's conversation request is sent to this Control Node; This Control Node finds the Control Node of this user's registration according to user's conversation request, and user's conversation request is sent to the Control Node of this user's registration, the Control Node of this user's registration is carried out S-CSCF for this user, the called party address that comprises in the conversation request according to the user obtains carrying out for the callee Control Node address of S-CSCF from HSS, and user's conversation request being sent the Control Node that callee most carries out S-CSCF according to this address, the Control Node of carrying out S-CSCF for the callee is forwarded to the callee with user's conversation request.
6. IMS session route control method as claimed in claim 3 is characterized in that, if there is more than one HSS:
In step 21 or the step 22, the Control Node of carrying out S-CSCF and accepting this user's registration also obtains a key assignments by Hash DX_SLF_QUERY message, find the Control Node of carrying out SLF according to this key assignments, carry out S-CSCF and accept the address of the Control Node of this user's registration to the Control Node request HSS that carries out SLF; After receiving the address of HSS from the Control Node of carrying out SLF, the Control Node HSS corresponding with this address that carries out S-CSCF and accept this user's registration communicates by letter, and finishes user's registration.
7. IMS session route control method as claimed in claim 5 is characterized in that, if there is more than one HSS:
In step 31 or the step 32, the Control Node of this user's registration also Hash DX_SLF_QUERY message obtains a key assignments, finds the Control Node of carrying out SLF according to this key assignments, and the Control Node of this user's registration is to the address of the Control Node request HSS that carries out SLF; After receiving the address of HSS from the Control Node of carrying out SLF, the called party address that comprises in the conversation request of Control Node according to the user of this user's registration obtains carrying out for the callee Control Node address of S-CSCF from the HSS of the address correspondence of this HSS.
8. an IMS session route control system comprises the Control Node group, it is characterized in that the Control Node of specific quantity is as access node;
Access node is used to carry out P-CSCF for the user access control node cluster;
Control Node among the Control Node group also is used for the user and registers after by access node access control node cluster;
The Control Node of user's registration is used for setting up session for user and callee;
Wherein, each Control Node is when using Session Initiation Protocol to communicate among the Control Node group, and register requirement or conversation request Hash key assignments that Control Node sends the user are routed to next Control Node of handling this register requirement or conversation request according to the Chord algorithm.
9. IMS session route control system as claimed in claim 8, it is characterized in that, carry out the Control Node of P-CSCF for the user, be used for key assignments of registration request from user Hash, and find the Control Node of carrying out S-CSCF for this user according to the Chord routing algorithm, register requirement is sent to this Control Node finish registration.
10. IMS session route control system as claimed in claim 9, it is characterized in that, access node, be used for when it can be served for this user according to the predetermined strategy judgement, directly find the Control Node of carrying out S-CSCF and accepting this user's registration with key assignments of register requirement Hash and according to the Chord routing algorithm; When it can not be served for this user according to the predetermined strategy judgement, find the Control Node that can carry out P-CSCF for this user with key assignments of register requirement Hash and according to the Chord routing algorithm, this Control Node finds key of register requirement Hash the Control Node of carrying out S-CSCF and accepting this user's registration again.
11. IMS session route control system as claimed in claim 8, it is characterized in that, carry out the Control Node of P-CSCF, be used for finding the Control Node of this user's registration according to user's conversation request, and user's conversation request is sent to the Control Node of this user's registration, the Control Node of this user's registration is carried out S-CSCF for this user, the called party address that comprises in the conversation request according to the user, obtain carrying out the Control Node address of S-CSCF for the callee from HSS, and user's conversation request being sent the Control Node that callee most carries out S-CSCF according to this address, the Control Node of carrying out S-CSCF for the callee is forwarded to the callee with user's conversation request.
12. IMS session route control system as claimed in claim 8, it is characterized in that, access node, it is used for when can be served for this user according to the predetermined strategy judgement, directly find the Control Node of this user's registration, and user's conversation request is sent to the Control Node of this user's registration according to user's conversation request; When it can not be served for this user according to the predetermined strategy judgement, find the Control Node that to carry out P-CSCF for this user with key assignments of conversation request Hash of user and according to the Chord routing algorithm, and user's conversation request is sent to this Control Node, this Control Node finds the Control Node of this user's registration according to user's conversation request, and user's conversation request is sent to the Control Node of this user's registration.
13. IMS session route control system as claimed in claim 10 is characterized in that, if there is more than one HSS:
Carry out S-CSCF and accept the Control Node that this user registers, also be used for Hash DX_SLF_QUERY message and obtain a key assignments, find the Control Node of carrying out SLF according to this key assignments, carry out S-CSCF and accept the address of the Control Node of this user's registration to the Control Node request HSS that carries out SLF; After receiving the address of HSS from the Control Node of carrying out SLF, the Control Node HSS corresponding with this address that carries out S-CSCF and accept this user's registration communicates by letter, and finishes user's registration.
14. IMS session route control system as claimed in claim 10 is characterized in that, if there is more than one HSS:
The Control Node of this user's registration also is used for obtaining a key assignments by Hash DX_SLF_QUERY message, finds the Control Node of carrying out SLF according to this key assignments, and the Control Node of this user's registration is to the address of the Control Node request HSS that carries out SLF; After receiving the address of HSS from the Control Node of carrying out SLF, the called party address that comprises in the conversation request of Control Node according to the user of this user's registration obtains carrying out for the callee Control Node address of S-CSCF from the HSS of the address correspondence of this HSS.
CN201010107184.3A 2010-02-05 2010-02-05 IMS (IP (Internet Protocol) Multimedia Subsystem) session routing control method and system Active CN102148739B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201010107184.3A CN102148739B (en) 2010-02-05 2010-02-05 IMS (IP (Internet Protocol) Multimedia Subsystem) session routing control method and system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201010107184.3A CN102148739B (en) 2010-02-05 2010-02-05 IMS (IP (Internet Protocol) Multimedia Subsystem) session routing control method and system

Publications (2)

Publication Number Publication Date
CN102148739A true CN102148739A (en) 2011-08-10
CN102148739B CN102148739B (en) 2014-03-12

Family

ID=44422752

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201010107184.3A Active CN102148739B (en) 2010-02-05 2010-02-05 IMS (IP (Internet Protocol) Multimedia Subsystem) session routing control method and system

Country Status (1)

Country Link
CN (1) CN102148739B (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102970756A (en) * 2012-11-22 2013-03-13 华中科技大学 S-CSCF (Serving-Call Session Control Function) allocation method based on service capability P2P (Peer-to-Peer) distribution
CN103023979A (en) * 2012-11-22 2013-04-03 华中科技大学 Inter-domain communication method of distributed IMS (multimedia subsystem) core net framework
CN103118044A (en) * 2011-11-16 2013-05-22 华为终端有限公司 Content distribution business session management method, system and device
CN103685167A (en) * 2012-09-06 2014-03-26 阿尔卡特朗讯 Method, device and equipment for managing IMS session
CN104335544A (en) * 2012-05-21 2015-02-04 瑞典爱立信有限公司 Method and apparatus for handling p-cscf failure and restoring connectivity
CN106953804A (en) * 2016-01-07 2017-07-14 中国移动通信集团海南有限公司 The route information query method and device of called subscriber
CN110113303A (en) * 2019-03-25 2019-08-09 国家计算机网络与信息安全管理中心 Session Initiation Protocol stack SiteServer LBS and load-balancing method in a kind of telecommunications network IMS
CN111352716A (en) * 2020-03-10 2020-06-30 深圳市腾讯计算机系统有限公司 Task request method, device and system based on big data and storage medium

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1801815A (en) * 2005-08-08 2006-07-12 华为技术有限公司 Method for realizing initial Internet protocol multimedia subsystem registration
US20080181200A1 (en) * 2007-01-29 2008-07-31 Alcatel Lucent Use of a distributed hash table to federate many small-sized ims core infrastructures
CN101459894A (en) * 2007-12-11 2009-06-17 中国移动通信集团公司 Communication method, system and data center entity for IP multimedia subsystem
CN101610261A (en) * 2009-06-26 2009-12-23 中兴通讯股份有限公司 A kind of method and system of leading traditional fixed network user to access IMS domain
CN101621501A (en) * 2008-07-01 2010-01-06 中国移动通信集团公司 User registration control method and session functional control entity of communication system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1801815A (en) * 2005-08-08 2006-07-12 华为技术有限公司 Method for realizing initial Internet protocol multimedia subsystem registration
US20080181200A1 (en) * 2007-01-29 2008-07-31 Alcatel Lucent Use of a distributed hash table to federate many small-sized ims core infrastructures
CN101459894A (en) * 2007-12-11 2009-06-17 中国移动通信集团公司 Communication method, system and data center entity for IP multimedia subsystem
CN101621501A (en) * 2008-07-01 2010-01-06 中国移动通信集团公司 User registration control method and session functional control entity of communication system
CN101610261A (en) * 2009-06-26 2009-12-23 中兴通讯股份有限公司 A kind of method and system of leading traditional fixed network user to access IMS domain

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
张旭: "下一代IP多媒体子系统（IMS）中服务发现机制", 《中国优秀硕士学位论文全文数据库信息科技辑2007年》 *
房秉毅等: "基于P2P的下一代网络架构", 《中国通信学会信息通信网络技术委员会2009年年会论文集》 *

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103118044A (en) * 2011-11-16 2013-05-22 华为终端有限公司 Content distribution business session management method, system and device
CN103118044B (en) * 2011-11-16 2015-12-02 华为终端有限公司 Content distributing service conversation managing method and system, equipment
CN104335544A (en) * 2012-05-21 2015-02-04 瑞典爱立信有限公司 Method and apparatus for handling p-cscf failure and restoring connectivity
CN104335544B (en) * 2012-05-21 2018-05-15 瑞典爱立信有限公司 Method and apparatus for handling the connection of P-CSCF Failure And Recoveries
CN103685167A (en) * 2012-09-06 2014-03-26 阿尔卡特朗讯 Method, device and equipment for managing IMS session
CN102970756B (en) * 2012-11-22 2015-03-04 华中科技大学 S-CSCF (Serving-Call Session Control Function) allocation method based on service capability P2P (Peer-to-Peer) distribution
CN103023979B (en) * 2012-11-22 2015-04-15 华中科技大学 Inter-domain communication method of distributed IMS (multimedia subsystem) core net framework
CN102970756A (en) * 2012-11-22 2013-03-13 华中科技大学 S-CSCF (Serving-Call Session Control Function) allocation method based on service capability P2P (Peer-to-Peer) distribution
CN103023979A (en) * 2012-11-22 2013-04-03 华中科技大学 Inter-domain communication method of distributed IMS (multimedia subsystem) core net framework
CN106953804A (en) * 2016-01-07 2017-07-14 中国移动通信集团海南有限公司 The route information query method and device of called subscriber
CN110113303A (en) * 2019-03-25 2019-08-09 国家计算机网络与信息安全管理中心 Session Initiation Protocol stack SiteServer LBS and load-balancing method in a kind of telecommunications network IMS
CN110113303B (en) * 2019-03-25 2021-07-09 国家计算机网络与信息安全管理中心 SIP protocol stack load balancing system and method in telecommunication network IMS
CN111352716A (en) * 2020-03-10 2020-06-30 深圳市腾讯计算机系统有限公司 Task request method, device and system based on big data and storage medium
CN111352716B (en) * 2020-03-10 2024-03-01 深圳市腾讯计算机系统有限公司 Task request method, device and system based on big data and storage medium

Also Published As

Publication number Publication date
CN102148739B (en) 2014-03-12

Similar Documents

Publication Publication Date Title
JP4909773B2 (en) Home subscriber server configuration method, configuration system, program, and storage medium
US9906566B2 (en) Voice session termination for messaging clients in IMS
US8170005B2 (en) Methods and systems for assigning call session control server
JP4549393B2 (en) User registration in communication systems
US8266203B2 (en) Method for obtaining device information of user terminals and communication service function entity
US7796990B2 (en) Method for the routing of multimedia communication related signaling in a communication system
CN102148739B (en) IMS (IP (Internet Protocol) Multimedia Subsystem) session routing control method and system
CN101971592B (en) Local session controller, ip multimedia subsystem and session registration method
US20130132593A1 (en) Routing messages
US20040246965A1 (en) System and method for routing messages
US20120219127A1 (en) Method and system for implementing aggregate endpoints on IMS networks
CN103329499A (en) Dynamic assignment of a serving network node
KR20110050625A (en) Method, apparatus and system for registering a terminal with an application server in an ims
CN102177698A (en) Correlating communication sessions
CN101401384A (en) Methods and apparatus for registering or deregistering a user to or from an IP multimedia subsystem
JP2011511511A (en) Message handling in IP multimedia subsystem
CA2673275A1 (en) A method and an arrangement for handling a service request in a multimedia network
CN101563903A (en) Service adaptation in an IP multimedia subsystem network
CN105429988A (en) IMS (Internet Protocol Multimedia Subsystem) registration method and IMS registration system based on multiple services
US9692835B2 (en) Method and apparatuses for the provision of network services offered through a set of servers in an IMS network
KR100703426B1 (en) Method and apparatus for sending and receiving call unregistered user in a ip multimedia subsystem network
KR20070031155A (en) Distributed HSSHome Subscriber Server architecture
JP2012517720A (en) Method and apparatus for distinguishing several user devices sharing the same public user ID
EP2382749B1 (en) Allocation of a serving entity in a communication network
KR101360151B1 (en) Method of sip message transmission between gruu users in ims network, and device of the same

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant