CN103023979A - Inter-domain communication method of distributed IMS (multimedia subsystem) core net framework - Google Patents
Inter-domain communication method of distributed IMS (multimedia subsystem) core net framework Download PDFInfo
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Abstract
The invention discloses an inter-domain communication method of a distributed IMS (multimedia subsystem) core net framework. The inter-domain communication method comprises the following steps of: P-CSCF (proxy call session control function) of a distributed IMS core net receives a request of a user, and judges whether the type of the request is a login request or a conversation request; if the type of the request is the conversation request, the P-CSCF judges whether the user which initiates the login request is logined according to the self-stored user login information, if so, the P-CSCF obtains the login information of the user initiating the conversation request on the P-CSCF, the request is forwarded to the S-CSCF(serving-call session control function) logon by the user according to routing information in the request, and the S-CSCF logon by the user processes the conversation request according to the ascription area of a called user. The method provided by the invention is provided based on an area communication standard given by a 3GPP (the 3rd Generation Partnership Project) standard, and can guarantee that the distributed IMS core net which adopts a P2P distributed IMS core net has practical allocation and transport operation values.
Description
Technical field
The invention belongs to mobile Internet and telecommunications core network field, more specifically, relate to the inter-domain communication method under a kind of distributed IMS core net framework.
Background technology
Operator is the unified IMS network of unit construction according to user's scale and management system Yi Da district or province generally when actual deployment is runed IP Multimedia System (IP Multimedia Subsystem, be called for short IMS) core net.The networking of employing multiple domain can be by the different domain name of region allocation, and extension of network is good, is applicable to large-scale network-estabilishing.When the initial stage network size hour, but concentrated setting IMS core net is responsible for the business in a plurality of territories, but higher to the equipment of the core network functional requirement like this; Along with the expansion of network size, finally the IMS core network element can be set in each territory.So-called minute territory is in order to adapt to two demands: (1) single core net is can not scale too huge, otherwise it is larger to search administration overhead; (2) in order to keep the independence of single operation entity, such as the provincial entity of national Telecom Operators.Adopt the independent construction of minute province to build the IMS core net with minute Regional Center and can realize runing demand transprovincially, and can intercom mutually between the territory.Therefore, the function of the inter-domain communication of IMS core net is very important, has provided clear and definite standard criterion for inter-domain communication in the 3GPP standard.
The IMS core net all is the centralized networking plan in the 3GPP standard that adopts at present, centralized networking inevitably can bring the shortcomings such as the strong and node maintenance of Single Point of Faliure, performance bottleneck, extensibility is complicated, adopts the IMS core net of the distributed computing technology of P2P then can address the above problem preferably.So communication means all is based in traditional centralized networking between existing IMS core network domain, but there is not corresponding standard method for the inter-domain communication of the IMS core net that adopts the networking of P2P distributed computing technology.
Summary of the invention
Defective for prior art, the object of the present invention is to provide the inter-domain communication method under a kind of distributed IMS core net framework, the method proposes based on the inter-domain communication standard that the 3GPP standard provides, and can guarantee to adopt the distributed IMS core net of P2P technology to have the value that reality can be disposed, can be runed.
For achieving the above object, the invention provides the inter-domain communication method under a kind of distributed IMS core net framework, may further comprise the steps:
(1) P-CSCF of distributed IMS core net receives user's request;
(2) P-CSCF judges that the type of request is registration request or session request, if registration request then enters step (3), if the session request then enters step (4);
(3) P-CSCF is according to the user attaching territory processing register request of initiating request;
(4) P-CSCF judges that according to the user's registration information of self preserving whether the user who initiates registration request registers, if register, then enters step (6), otherwise enters step (5);
(5) P-CSCF sends to the user that the user is unregistered can't to carry out receiveing the response of session, and flow process finishes;
(6) P-CSCF obtains the log-on message of user on P-CSCF that initiates a session request, and then according to the routing iinformation in the request request is forwarded to the S-CSCF that the user registers the place;
(7) the user S-CSCF that registers the place processes the session request according to called subscriber's home domain.
Step (3) comprising:
(3-1) P-CSCF takes out user's information from registration request, contrast user's home domain domain name and the domain name in territory, P-CSCF self place judge whether the user belongs to the territory at P-CSCF place, if belong to then enter step (3-2), otherwise enter step (3-3);
(3-2) P-CSCF carries out P2P with user's IMPU as key, obtaining the address of corresponding S-CSCF, and registration request is forwarded to this S-CSCF, then enters step (3-12);
(3-3) P-CSCF searches the I-CSCF address list that self whether is cached with the user attaching territory, if be cached with, then enters step (3-4), otherwise enters step (3-5);
(3-4) P-CSCF selects an available I-CSCF from the I-CSCF address list in the user attaching territory of buffer memory, and registration request is forwarded to this I-CSCF, then enters step (3-11);
(3-5) P-CSCF searches the I-CSCF address list that self whether is cached with self territory, place, if be cached with, then enters step (3-8), otherwise enters step (3-6);
(3-6) P-CSCF domain name take self territory, place in the territory is searched as key carries out P2P, to obtain the I-CSCF address list;
(3-7) the I-CSCF tabulation in P-CSCF self territory, place that will find is buffered in the internal memory;
(3-8) P-CSCF selects an available I-CSCF from the I-CSCF address list in self territory, place of buffer memory, sends the I-CSCF address list request of searching the user attaching territory to this I-CSCF, then enters step (3-9);
(3-9) I-CSCF receives the search request from P-CSCF, searches as key carries out P2P in global field take the domain name in the user attaching territory of searching, and obtaining corresponding I-CSCF address list, and the result that will find returns to P-CSCF;
(3-10) P-CSCF is cached the I-CSCF address list according to the result that I-CSCF returns, and therefrom selects an available I-CSCF, and registration request is transmitted to this I-CSCF;
(3-11) I-CSCF in user attaching territory is according to from the registration request of P-CSCF, carries out P2P with user's IMPU as key and searches, and obtaining the address of corresponding S-CSCF, and registration request is forwarded to this S-CSCF;
(3-12) S-CSCF processes registration request according to the 3GPP normal process according to the registration request of receiving.
Step (7) comprising:
(7-1) S-CSCF takes out called user information from the session request, with user's home domain domain name and self territory, place domain name contrast, judging whether called home domain with the place of self territory, place, if, then enter step (7-2), otherwise enter step (7-5);
(7-2) S-CSCF carries out P2P take called subscriber IMPU as key and searches in self territory, place, to get access to S-CSCF address corresponding to called subscriber IMPU;
(7-3) S-CSCF is according to the S-CSCF address of the called subscriber that finds registration, and the S-CSCF that the user IMPU key-value pair in self territory, place is answered transmits the session request;
(7-4) S-CSCF that answers of called subscriber IMPU key-value pair receives the S-CSCF session request from the calling subscriber place, according to the 3GPP normal process session request is processed, and process finishes;
(7-5) S-CSCF searches the I-CSCF address list that self whether is cached with called subscriber's home domain, if find, then enters step (7-12), otherwise enters step (7-6);
(7-6) S-CSCF searches the I-CSCF address list that self whether is cached with self territory, place, if find, then enters step (7-9), otherwise enters step (7-7);
(7-7) S-CSCF searches as key carries out P2P take the domain name in self territory, place, to obtain the I-CSCF address list in self territory, place;
(7-8) S-CSCF is cached to the I-CSCF address list that finds in the internal memory;
(7-9) S-CSCF is random from the I-CSCF address list in self territory, place of buffer memory selects an available I-CSCF, and initiates the I-CSCF address list request of searching called subscriber's home domain to this I-CSCF;
(7-10) I-CSCF, carries out P2P and searches, and lookup result is returned to S-CSCF take this home domain domain name as key according to the called subscriber's home domain I-CSCF address list request of searching from S-CSCF in global field;
(7-11) S-CSCF will be buffered in the internal memory from the lookup result I-CSCF of I-CSCF;
(7-12) S-CSCF selects an available I-CSCF from the I-CSCF address list, and the session request is transmitted to the I-CSCF of called subscriber's home domain;
(7-13) I-CSCF of called subscriber's home domain carries out P2P take called subscriber IMPU as key according to the session request and searches to obtain corresponding S-CSCF address in self territory, place
(7-14) I-CSCF of called subscriber's home domain is according to lookup result, and the session request is forwarded to this S-CSCF;
(7-15) S-CSCF that answers of called subscriber IMPU key-value pair receives the session request from I-CSCF, according to the 3GPP standard session request is processed, and process finishes.
By the above technical scheme that the present invention conceives, compared with prior art, the present invention has following beneficial effect:
(1) load balancing of realization core net functional node: the IMS core net can embody distribution in step (3-2), (3-11), (7-2), (7-13) after adopts the distributed node of searching to be assigned as user's service of P2P, thereby can guarantee relatively being distributed on the different nodes of equilibrium of user load, the system that guaranteed has certain load equilibrium.
(2) eliminated the original Single Point of Faliure of IMS core net: use P2P distribution core net afterwards can not cause because of the fault of individual node service unavailable, had to a certain extent disaster tolerance.
(3) the IMS core net after the distribution is with good expansibility: use P2P distribution core net afterwards can add easily new service node and provide service as the user.
(4) alleviate home subscriber server (Home Subscriber Server, be called for short HSS) query load: search S-CSCF address that the user registers the place in this method and be no longer dependent on inquiry HSS but obtain by distributed the searching of the P2P of core net inside, in step (3-2), (3-11), (7-2), (7-13), can embody, thereby can reduce the query load of HSS.
Description of drawings
Fig. 1 is the flow chart of the inter-domain communication method under the distributed IMS core net framework of the present invention.
Fig. 2 is the refinement flow chart of step in the inventive method (3).
Fig. 3 is the refinement flow chart of step in the inventive method (7).
Fig. 4 is the group network topological structure figure of distributed IMS core net of the present invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
As shown in Figure 1, the inter-domain communication method under the distributed IMS core net framework of the present invention may further comprise the steps:
(1) Proxy Call Session Control Function of distributed IMS core net (Proxy Call SessionControl Function is called for short P-CSCF) receives user's request.
(2) P-CSCF judges that the type of request is registration request or session request, if registration request then enters step (3), if the session request then enters step (4).
(3) P-CSCF is according to the user attaching territory processing register request of initiating request.
As shown in Figure 4, the IMS actual deployment time-division economizes or sets up each operation territory with Regional Center, P-CSCF in each territory, query call session control control function (Interrogating Call SessionControl Function, be called for short I-CSCF), S-CSCF is according to distributed hashtable (Distributed HashTable, abbreviation DHT) the operation territory shown in the medium and small ring of algorithm composition diagram, node in the ring is divided into two types: a kind of is that equity (Peer) node is responsible for message route and data storage, another is that client (Client) node only adds nerve of a covering by relevant Peer node, wherein S-CSCF is as the Peer node, and I-CSCF and P-CSCF are as Domain A among each territory among the Client node adding nerve of a covering formation figure such as the figure, Domain B, Domain C etc.Then the I-CSCF in each territory forms a global field jointly, namely according to the large ring global field (GlobalDomain) in the DHT algorithm composition diagram.Each user belongs to some territories in the IMS core net, and this is to have determined when the user opens account, i.e. user's home domain is reflected as the territory at some little rings place in the drawings.
(4) P-CSCF judges that according to the user's registration information of self preserving whether the user who initiates registration request registers, if register, then enters step (6), otherwise enters step (5).
(5) P-CSCF sends to the user that the user is unregistered can't to carry out receiveing the response of session, and flow process finishes.
(6) P-CSCF obtains the log-on message of user on P-CSCF that initiates a session request, and then according to the routing iinformation in the request request is forwarded to the S-CSCF that the user registers the place.
(7) the user S-CSCF that registers the place processes the session request according to called subscriber's home domain.
As shown in Figure 2, step (3) comprising in the inter-domain communication method under the distributed IMS core net framework of the present invention:
(3-1) P-CSCF takes out user's information from registration request, contrast user's home domain domain name and the domain name in territory, P-CSCF self place judge whether the user belongs to the territory at P-CSCF place, if belong to then enter step (3-2), otherwise enter step (3-3).
(3-2) P-CSCF is with user's public subscriber identification (IP Multimedia Public Identity, be called for short IMPU) carry out P2P as key, obtaining the address of corresponding S-CSCF, and registration request is forwarded to this S-CSCF, then enters step (3-12).
(3-3) P-CSCF searches the I-CSCF address list that self whether is cached with the user attaching territory, if be cached with, then enters step (3-4), otherwise enters step (3-5).
(3-4) P-CSCF selects an available I-CSCF from the I-CSCF address list in the user attaching territory of buffer memory, and registration request is forwarded to this I-CSCF, then enters step (3-11).
(3-5) P-CSCF searches the I-CSCF address list that self whether is cached with self territory, place, if be cached with, then enters step (3-8), otherwise enters step (3-6).
(3-6) P-CSCF domain name take self territory, place in the territory is searched as key carries out P2P, to obtain the I-CSCF address list.
(3-7) the I-CSCF tabulation in P-CSCF self territory, place that will find is buffered in the internal memory.
(3-8) P-CSCF selects an available I-CSCF from the I-CSCF address list in self territory, place of buffer memory, sends the I-CSCF address list request of searching the user attaching territory to this I-CSCF, then enters step (3-9).
(3-9) I-CSCF receives the search request from P-CSCF, domain name take the user attaching territory of searching is searched as key carries out P2P at (shown in Global Domain among Fig. 4) in the global field, obtaining corresponding I-CSCF address list, and the result that will find returns to P-CSCF.
(3-10) P-CSCF is cached the I-CSCF address list according to the result that I-CSCF returns, and therefrom selects an available I-CSCF, and registration request is transmitted to this I-CSCF.
(3-11) I-CSCF in user attaching territory is according to from the registration request of P-CSCF, carries out P2P with user's IMPU as key and searches, and obtaining the address of corresponding S-CSCF, and registration request is forwarded to this S-CSCF.
(3-12) S-CSCF processes registration request according to the 3GPP normal process according to the registration request of receiving.
As shown in Figure 3, step (7) comprising in the inter-domain communication method under the distributed IMS core net framework of the present invention:
(7-1) S-CSCF takes out called user information from the session request, with user's home domain domain name and self territory, place domain name contrast, judging whether called home domain with the place of self territory, place, if, then enter step (7-2), otherwise enter step (7-5).
(7-2) S-CSCF carries out P2P take called subscriber IMPU as key and searches in self territory, place, to get access to S-CSCF address corresponding to called subscriber IMPU.
(7-3) S-CSCF is according to the S-CSCF address of the called subscriber that finds registration, and the S-CSCF that the user IMPU key-value pair in self territory, place is answered transmits the session request.
(7-4) S-CSCF that answers of called subscriber IMPU key-value pair receives the S-CSCF session request from the calling subscriber place, according to the 3GPP normal process session request is processed, and process finishes.
(7-5) S-CSCF searches the I-CSCF address list that self whether is cached with called subscriber's home domain, if find, then enters step (7-12), otherwise enters step (7-6).
(7-6) S-CSCF searches the I-CSCF address list that self whether is cached with self territory, place, if find, then enters step (7-9), otherwise enters step (7-7).
(7-7) S-CSCF searches as key carries out P2P take the domain name in self territory, place, to obtain the I-CSCF address list in self territory, place.
(7-8) S-CSCF is cached to the I-CSCF address list that finds in the internal memory.
(7-9) S-CSCF is random from the I-CSCF address list in self territory, place of buffer memory selects an available I-CSCF, and initiates the I-CSCF address list request of searching called subscriber's home domain to this I-CSCF.
(7-10) I-CSCF, carries out P2P and searches, and lookup result is returned to S-CSCF take this home domain domain name as key according to the called subscriber's home domain I-CSCF address list request of searching from S-CSCF in global field (the Global Domain among Fig. 4).
(7-11) S-CSCF will be buffered in the internal memory from the lookup result I-CSCF of I-CSCF.
(7-12) S-CSCF selects an available I-CSCF from the I-CSCF address list, and the session request is transmitted to the I-CSCF of called subscriber's home domain.
(7-13) I-CSCF of called subscriber's home domain carries out P2P take called subscriber IMPU as key according to the session request and searches to obtain corresponding S-CSCF address in self territory, place
(7-14) I-CSCF of called subscriber's home domain is according to lookup result, and the session request is forwarded to this S-CSCF.
(7-15) S-CSCF that answers of called subscriber IMPU key-value pair receives the session request from I-CSCF, according to the 3GPP standard session request is processed, and process finishes.
Application example:
For feasibility and the validity of verifying the inventive method, under true environment, verify the inventive method.Experimental situation comprises installs CentOS release 5.6 operating systems, realization FHoSS, the IMS experimental system of the increasing income Open IMS Core of the HSS system that increases income and standard I MS customer end B oghe.The experimental situation configuration is as shown in table 1.
Table 1
After the CSCF server disposed according to the network topology structure that proposes among the present invention (as shown in Figure 4), the user carry out respectively directly in home domain, directly registering with the user the roaming territory register, check whether the user can finish respectively register flow path in both cases.Registering result is: the user can register at home domain with from the roaming territory normally, illustrates that the processing for cross-domain register flow path is normal in this method.Then utilize chartered account to carry out the session request for test, call out respectively called subscriber and the user who is in different home domain in same territory, check whether the user can set up session and converse normally.Test result is: no matter whether calling subscriber and called subscriber belong to same home domain, can both normally converse, and feasible when illustrating in this method for cross-domain user conversation request processing flow.
Through the test of above-mentioned two experiment scenes, communication means can guarantee effectively that the user carries out cross-domain communication under the distributed IMS core net framework between the distributed IMS core network domain that the present invention discusses.
Those skilled in the art will readily understand; the above only is preferred embodiment of the present invention; not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., all should be included within protection scope of the present invention.
Claims (3)
1. the inter-domain communication method under the distributed IMS core net framework is characterized in that, may further comprise the steps:
(1) P-CSCF of distributed IMS core net receives user's request;
(2) P-CSCF judges that the type of request is registration request or session request, if registration request then enters step (3), if the session request then enters step (4);
(3) P-CSCF is according to the user attaching territory processing register request of initiating request;
(4) P-CSCF judges that according to the user's registration information of self preserving whether the user who initiates registration request registers, if register, then enters step (6), otherwise enters step (5);
(5) P-CSCF sends to the user that the user is unregistered can't to carry out receiveing the response of session, and flow process finishes;
(6) P-CSCF obtains the log-on message of user on P-CSCF that initiates a session request, and then according to the routing iinformation in the request request is forwarded to the S-CSCF that the user registers the place;
(7) the user S-CSCF that registers the place processes the session request according to called subscriber's home domain.
2. inter-domain communication method according to claim 1 is characterized in that, step (3) comprising:
(3-1) P-CSCF takes out user's information from registration request, contrast user's home domain domain name and the domain name in territory, P-CSCF self place judge whether the user belongs to the territory at P-CSCF place, if belong to then enter step (3-2), otherwise enter step (3-3);
(3-2) P-CSCF carries out P2P with user's IMPU as key, obtaining the address of corresponding S-CSCF, and registration request is forwarded to this S-CSCF, then enters step (3-12);
(3-3) P-CSCF searches the I-CSCF address list that self whether is cached with the user attaching territory, if be cached with, then enters step (3-4), otherwise enters step (3-5);
(3-4) P-CSCF selects an available I-CSCF from the I-CSCF address list in the user attaching territory of buffer memory, and registration request is forwarded to this I-CSCF, then enters step (3-11);
(3-5) P-CSCF searches the I-CSCF address list that self whether is cached with self territory, place, if be cached with, then enters step (3-8), otherwise enters step (3-6);
(3-6) P-CSCF domain name take self territory, place in the territory is searched as key carries out P2P, to obtain the I-CSCF address list;
(3-7) the I-CSCF tabulation in P-CSCF self territory, place that will find is buffered in the internal memory;
(3-8) P-CSCF selects an available I-CSCF from the I-CSCF address list in self territory, place of buffer memory, sends the I-CSCF address list request of searching the user attaching territory to this I-CSCF, then enters step (3-9);
(3-9) I-CSCF receives the search request from P-CSCF, searches as key carries out P2P in global field take the domain name in the user attaching territory of searching, and obtaining corresponding I-CSCF address list, and the result that will find returns to P-CSCF;
(3-10) P-CSCF is cached the I-CSCF address list according to the result that I-CSCF returns, and therefrom selects an available I-CSCF, and registration request is transmitted to this I-CSCF;
(3-11) I-CSCF in user attaching territory is according to from the registration request of P-CSCF, carries out P2P with user's IMPU as key and searches, and obtaining the address of corresponding S-CSCF, and registration request is forwarded to this S-CSCF;
(3-12) S-CSCF processes registration request according to the 3GPP normal process according to the registration request of receiving.
3. inter-domain communication method according to claim 1 is characterized in that, step (7) comprising:
(7-1) S-CSCF takes out called user information from the session request, with user's home domain domain name and self territory, place domain name contrast, judging whether called home domain with the place of self territory, place, if, then enter step (7-2), otherwise enter step (7-5);
(7-2) S-CSCF carries out P2P take called subscriber IMPU as key and searches in self territory, place, to get access to S-CSCF address corresponding to called subscriber IMPU;
(7-3) S-CSCF is according to the S-CSCF address of the called subscriber that finds registration, and the S-CSCF that the user IMPU key-value pair in self territory, place is answered transmits the session request;
(7-4) S-CSCF that answers of called subscriber IMPU key-value pair receives the S-CSCF session request from the calling subscriber place, according to the 3GPP normal process session request is processed, and process finishes;
(7-5) S-CSCF searches the I-CSCF address list that self whether is cached with called subscriber's home domain, if find, then enters step (7-12), otherwise enters step (7-6);
(7-6) S-CSCF searches the I-CSCF address list that self whether is cached with self territory, place, if find, then enters step (7-9), otherwise enters step (7-7);
(7-7) S-CSCF searches as key carries out P2P take the domain name in self territory, place, to obtain the I-CSCF address list in self territory, place;
(7-8) S-CSCF is cached to the I-CSCF address list that finds in the internal memory;
(7-9) S-CSCF is random from the I-CSCF address list in self territory, place of buffer memory selects an available I-CSCF, and initiates the I-CSCF address list request of searching called subscriber's home domain to this I-CSCF;
(7-10) I-CSCF, carries out P2P and searches, and lookup result is returned to S-CSCF take this home domain domain name as key according to the called subscriber's home domain I-CSCF address list request of searching from S-CSCF in global field;
(7-11) S-CSCF will be buffered in the internal memory from the lookup result I-CSCF of I-CSCF;
(7-12) S-CSCF selects an available I-CSCF from the I-CSCF address list, and the session request is transmitted to the I-CSCF of called subscriber's home domain;
(7-13) I-CSCF of called subscriber's home domain carries out P2P take called subscriber IMPU as key according to the session request and searches to obtain corresponding S-CSCF address in self territory, place
(7-14) I-CSCF of called subscriber's home domain is according to lookup result, and the session request is forwarded to this S-CSCF;
(7-15) S-CSCF that answers of called subscriber IMPU key-value pair receives the session request from I-CSCF, according to the 3GPP standard session request is processed, and process finishes.
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| CN114070823A (en) * | 2021-11-10 | 2022-02-18 | 北京挪拉斯坦特芬通信设备有限公司 | Session establishment control method, electronic device, and computer-readable storage medium |
| CN115102987A (en) * | 2022-06-16 | 2022-09-23 | 平安银行股份有限公司 | Bank outlet's marginal equipment management system |
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| CN114070823A (en) * | 2021-11-10 | 2022-02-18 | 北京挪拉斯坦特芬通信设备有限公司 | Session establishment control method, electronic device, and computer-readable storage medium |
| CN114070823B (en) * | 2021-11-10 | 2023-11-03 | 北京挪拉斯坦特芬通信设备有限公司 | Session establishment control method, electronic device, and computer-readable storage medium |
| CN115102987A (en) * | 2022-06-16 | 2022-09-23 | 平安银行股份有限公司 | Bank outlet's marginal equipment management system |
| CN115102987B (en) * | 2022-06-16 | 2023-10-13 | 平安银行股份有限公司 | Edge equipment management system for banking outlets |
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| CN103023979B (en) | 2015-04-15 |
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