CN101115232B - Roaming control method and system for accessing to IP multimedia subsystem network through SBC - Google Patents
Roaming control method and system for accessing to IP multimedia subsystem network through SBC Download PDFInfo
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Abstract
The invention relates to a roaming control method access to IMS through SBC. One or more network marks of a conversational boundary control network element allowing the access of the users is added in a network marking list allowing the access of the users, then in the conversational boundary control network element, a P-Visited-Network-ID head domain is inserted in the register request message of the IP of users multimedia subsystem transferred to an agent conversation control network element, and the network mark of the conversational boundary control network element is filled in the head domain. The agent conversation control function network element processes the register request message and then carries out the subsequent register processes. The invention can carry out the roaming control access to IMS through SBC, control the roaming behavior of the users, prevent users from using network exceeding the authority and avoid abusing network resources.
Description
Technical field
The present invention relates to the IMS network, relate in particular to a kind of roam control method and system that inserts the IMS network by SBC.
Background technology
IP Multimedia System (IP Multimedia Subsystem, IMS) the earliest by 3GPP (3rdGeneration Partnership Project, third generation partner program) in its standard series R5, proposes, be one and provide the subsystem of IP multimedia service based on PS (Packet Switching, packet switching) territory.Subsequently, IMS becomes the core technology that realizes the network integration and integrated services gradually, 3GPP2 (3rdGeneration Partnership Project II, third generation partner program 2), ITU-T (InternationalTelecommunications Union-Telecommunication standardization sector, standardization department of international telecommunication union telecommunication) NGN-GSI (Next Generation Network Global StandardsInitiative, the behave of NGN global standards), ETSI (Europe Telecommunications StandardsInstitute ETSI European Telecommunications Standards Institute) TISPAN International Standards Organization such as (Telecommunication andInternetconverged Services and Protocols for Advanced Networking, telecommunications and the Internet converged services and high-level network protocols) also begins IMS is studied.
IMS adopts the architecture of layering, is divided into three layers of business network, IMS core network and access networks.Wherein business network is made up of various application servers, and end user's service logic is provided; The IMS core network is finished multimedia service basic calling control and connection control function, provides QoS (Quality ofService, service quality) to ensure and accounting management; Access network is supported the multiple access technology from wireless to wired, comprise DSL (Digital SubscriberLine, digital subscriber line), WLAN (WirelessLocal-area Network, WLAN (wireless local area network)), WCDMA (Wideband Code Division MultipleAccess, Wideband Code Division Multiple Access (WCDMA)) and CDMA2000 etc., one of IMS system core thought be exactly its core network with insert irrelevant.
IP Multimedia System (IMS) core network is by agent conversation control function network element (P-CSCF), serving session control function network element (S-CSCF), inquiry session controlled function network element (I-CSCF), home subscriber server (HSS), application server (AS), Subscription Locator Function network element (SLF), media resource function network element (MRF), Breakout Gateway Control Function network element (BGCF), IMS media gateway (IMS-MGW), strategy decisive function/strategy and charging policy function network element (PDF/PCRF), MGCF network element network elements such as (MGCF) is formed, as shown in Figure 1.
For satisfying the user by xDSL (various types of digital subscriber line), fixed network access into IMS core networks such as LAN (local area network (LAN)), WLAN, need to introduce session border control network element (SBC) and finish SIP (Session Initiation Protocol, Session initiation Protocol) NAT of signaling (Network AddressTranslation, network address translation) pass through, safety, service quality functions such as (QoS).SBC inserts first entrance of IMS network as the user, and all user-dependent SIP signalings and medium all must be transmitted through SBC.
The user at first needed to obtain the address of IMS network ingress point before obtaining the service that the IMS network provides, for mobile subscriber (user who promptly uses the mobile network to insert), this entry point address is the address of P-CSCF; For fixed-line subscriber (user who promptly uses fixed network to insert by SBC), this entry point address is the address of SBC.The user has obtained after the address of IMS network ingress point, can initiate registration to the IMS network.3GPP regulation IMS user must carry out business control at home network in the signatory business of home network.For the IMS roaming that move to insert, 3GPP has clear and definite definition, and promptly the P-CSCF that inserts of user and GGSN be in same visit, and in registration process, the user attaching network is by being that the sign of the P-CSCF of its service judges whether IMS user roams.And the demand of roaming is also arranged by the user of fixed network access into IMS, promptly the user can insert IMS at other visited network that be different from home network.
Fixed-line subscriber inserts the IMS network by SBC, and existing standard is to be used as user's visited network sign by the network identity of P-CSCF, thereby user's roaming is controlled.If the network identity of P-CSCF can not embody user position information, when only being present in user's home network, then can't roam control to the user according to existing standard such as P-CSCF.
Roaming is controlled at clear and definite regulation in the 3GPP relevant criterion.During user's initial registration, Register message is sent to the P-CSCF of place visited network, P-CSCF can insert the P-Visited-Network-ID header field in Register message, wherein insert the network identity of this P-CSCF, this header field represents to initiate the IMS visited network at the user place of IMS registration.After I-CSCF receives Register message from P-CSCF, structure UAR (User-Authorization-Request, user-authorization-request) message, wherein insert Visited-Network-Identifier AVP (property value to), this AVP is the P-Visited-Network-ID header field in the Register message, and UAR message is issued HSS.It among the HSS network list (List of authorized visited networkidentifiers) that allows visit of each IMS user's permanent storage, this tabulation and public user identity (Public User Identifier, PUI) be associated, expression allows which network of this user capture.After HSS receives the UAR message that I-CSCF sends, the PUI that represents according to the Public-Identity AVP field in the message searches corresponding user data, from the Visited-Network-Identifier AVP of UAR message, take out the visited network sign, search in the network list of permission visit of this PUI correspondence and whether have this network identity, if exist, then allow this PUI renewal of registration, if there is no, then expression does not allow this PUI in this visited network roaming, Experimental-Result-Code AVP in returning to the UAA of I-CSCF (User-Authorization-Answer) message inserts " DIAMETER_ERROR_ROAMING_NOT_ALLOWED ", return messages were given P-CSCF after I-CSCF received this UAA, thus registration failure.
Operator is when disposing IMS, and according to the difference of its demand, the actual sets net mode has certain difference.For fixed operator when the large-scale network-estabilishing, can be that unit divides the IMS territory with the province, network element devices such as HSS, P-CSCF, S-CSCF, I-CSCF, SBC promptly are set, for IMS user inside the province and the IMS user that roams into other provinces of this province provide service in each provincial capital.Can adopt and move insert the identical roam control method of IMS in this case, promptly the P-CSCF visited network that inserts the P-Visited-Network-ID header field and insert its representative in Register message identifies.But this networking mode requires independently to set up one in each province overlaps the IMS network equipment, initial investment is very big, and the operation maintenance of province branch company had relatively high expectations, under the prerequisite that does not have the extensive commercial experience of IMS, this networking mode is not suitable for the initial stage small-scale application.
A kind of networking mode that the suitable IMS initial stage is disposed on a small scale is, the whole nation is divided into an IMS territory, concentrate deployment one cover IMS core in general headquarters' aspect, comprise network elements such as HSS, P-CSCF, S-CSCF, I-CSCF, independently SBC is set in the each province, and the user concentrates access IMS network by the SBC in province, place.It is less that this networking mode is adapted at the initial stage userbase, the situation that traffic carrying capacity is little, and IMS network element concentrated is provided with to be beneficial to carries out the whole network business, is convenient to centralized management, and maintenance cost is low; Because all signaling and the Media Streams of IMS user all will pass through SBC, the distribution setting of SBC can be reduced the circuitous of signaling and Media Stream to greatest extent, improves quality of service, and effectively protects the IMS network security.Networking structure as shown in Figure 2, shown that the Guangzhou user roams into the network configuration in Shanghai, the IMS core is deployed in Beijing Data-carrying net, comprises network elements such as HSS, P-CSCF, S-CSCF, I-CSCF, and only disposes SBC at Guangzhou Data-carrying net and Shanghai Data-carrying net.
Under this networking mode, because all IMS core network elements of the whole network all belong to a territory, especially P-CSCF is present in this territory all the time, and has only the network identity of P-CSCF in the network list of the permission of preserving for each PUI among HSS visit, this makes when no matter the user inserts IMS on any visit ground, after the login request message of initiating arrives P-CSCF through SBC, the P-Visited-Network-ID header field that P-CSCF inserts in sending to the login request message of I-CSCF can't reflect user's actual position information, the IMS network just can't be judged user's roaming state according to the network identity of P-CSCF like this, also just can not control user's roaming.Idiographic flow comprises as shown in Figure 3:
Step 36, I-CSCF initiates login request message Register to S-CSCF.
Step 310, S-CSCF returns success message 200OK to I-CSCF.
Step 311, I-CSCF returns success message 200OK to P-CSCF.
UE in the above-mentioned steps and SBC are positioned at access zone network (Vistited Network) or home network (Home Network), and S-CSCF, I-CSCF, P-CSCF, HSS are positioned at home network (HomeNetwork).
Summary of the invention
In order to solve above-mentioned technical problem, a kind of roam control method and system that inserts the IMS network by SBC is provided, its purpose is, is implemented in the IMS core network element and concentrates and be provided with and SBC distributes under the networking condition that is provided with, and the user who inserts IMS by SBC is controlled.
The invention provides a kind of roam control method that inserts the IP Multimedia System network by session border control network element, under the networking condition that is provided with that is used for that the IP Multimedia System core network element concentrate to be provided with and session border control network element distributes, the user who allows roaming is controlled, comprising:
Step 1 adds the network identity that one or more session border that allows the user to insert is controlled network element in the list of network identifications that allows user capture;
Step 2 is inserted the P-Visited-Network-ID header field at session border control network element in agent conversation control function network element forwarding user's IP Multimedia System login request message, and inserts the network identity of this session border control network element in this header field;
Step 3, agent conversation control function network element is handled login request message, and the nslookup server obtains the inquiry session controlled function network element address of user attaching network, sends login request message to this inquiry session controlled function network element;
Step 4, inquiry session controlled function network element is received structuring user's authorization request message after the login request message, the network identity of the session border in the P-Visited-Network-ID header field wherein control network element is inserted Visited-Network-Identifier AVP in the user authorization request message, user authorization request message is sent to home subscriber server;
Step 5, home subscriber server is searched the list of network identifications of described permission user capture according to the public user identity in the user authorization request message, value to the Visited-Network-Identifier AVP in the home subscriber server message is judged, if this AVP value is present in the list of network identifications of permission user capture of this public user identity correspondence, then allow the user to insert, otherwise do not allow the user to insert.
In the step 3, described agent conversation control function network element is handled login request message and is comprised: after agent conversation control function network element receives session border control network element forwarding registration request from user message, P-Visited-Network-ID header field is wherein checked, if there is this header field, then agent conversation control function network element is not handled this header field, otherwise agent conversation control function network element is inserted the P-Visited-Network-ID header field in login request message, and inserts the network identity of this agent conversation control function network element.
In the step 3, described agent conversation control function network element is treated to the processing of inserting the P-Visited-Network-ID header field in login request message after agent conversation control function network element receives session border control network element forwarding registration request from user message to login request message.
Between described step 1 and the step 2, also comprise step 41, subscriber equipment is initiated the IP Multimedia System login request message to session border control network element.
The invention provides a kind of roaming control system that inserts the IP Multimedia System network by session border control network element, under the networking condition that is provided with that is used for that the IP Multimedia System core network element concentrate to be provided with and session border control network element distributes, the user who allows roaming is controlled, comprising:
List of network identifications is provided with module, adds the network identity that one or more session border that allows the user to insert is controlled network element in the list of network identifications that allows user capture;
Session border control network element network identity is provided with module, in agent conversation control function network element forwarding user's IP Multimedia System login request message, insert the P-Visited-Network-ID header field at session border control network element, and in this header field, insert the network identity of this session border control network element;
Described agent conversation control function network element is used for login request message is handled, and the inquiry session controlled function network element address of nslookup server acquisition user attaching network, sends login request message to this inquiry session controlled function network element;
Inquiry session controlled function network element is used to receive structuring user's authorization request message after the login request message, and the network identity of session boundary Control network element is inserted Visited-Network-Identifier AVP in the user authorization request message;
Home subscriber server, search the list of network identifications of described permission user capture according to the public user identity in the user authorization request message, and judge whether to allow the user to insert according to the value of the Visited-Network-Identifier AVP in the home subscriber server message; Wherein, if this AVP value is present in the list of network identifications of permission user capture of this public user identity correspondence, then allows the user to insert, otherwise do not allow the user to insert.
Described agent conversation control function network element is handled login request message and is comprised: after agent conversation control function network element receives session border control network element forwarding registration request from user message, P-Visited-Network-ID header field is wherein checked, if there is this header field, then agent conversation control function network element is not handled this header field, otherwise agent conversation control function network element is inserted the P-Visited-Network-ID header field in login request message, and inserts the network identity of this agent conversation control function network element.
Described agent conversation control function network element is treated to the processing of inserting the P-Visited-Network-ID header field in login request message after agent conversation control function network element receives session border control network element forwarding registration request from user message to login request message.
Described list of network identifications is provided with module and is arranged in home subscriber server; Session border control network element network identity is provided with module and is arranged in session border control network element; P-Visited-Network-ID header field detection module is arranged in agent conversation control function network element.
The invention solves at IMS and dispose the initial stage, the IMS core network element concentrates on national centre and disposes, and SBC is distributed under the networking condition of disposing the each province, the register flow path of 3GPP standard code can't judge user position information, thereby can't realize the problem to the roaming control that inserts the user from fixed network.The present invention utilizes the SBC feature relevant with the geographical position under this networking mode, the visited network that makes SBC provide the user to insert the IMS network identifies, simultaneously in the user data of HSS, CAMEL-Subscription-Information according to the user, the corresponding network list that allows visit of configuration, thereby when the user initiated the IMS registration, whether HSS can allow the user to pass through this network insertion IMS system according to the network list decision that the permission that this user contracts is visited.Fixed-line subscriber is inserted the IMS network roam control, can control, can prevent user's use network of going beyond one's commission, avoid causing the Internet resources abuse user's roaming behavior; Can determine user's IMS roaming state, be beneficial to the IMS roaming of carrying out the user and charge, thereby be the new source of profit of operator's increase; Can utilize user's roaming position information, can provide and roam relevant business for the user, thereby improve user experience, improve user's loyalty.
Description of drawings
Fig. 1 is an IMS system construction drawing of the prior art;
Fig. 2 inserts the network structure of IMS for fixed-line subscriber;
Fig. 3 is the register flow path figure that fixed-line subscriber inserts the IMS network in the prior art;
Fig. 4 inserts the roaming control flow chart of IMS network for fixed-line subscriber among the present invention.
Embodiment
The invention provides the roam control method of a kind of fixing access IMS system,, make to concentrate to be provided with and SBC distributes under the networking condition that is provided with, can control the roaming of fixed-line subscriber at the IMS core network element by increasing the function of SBC and P-CSCF.
Having defined the user data " List of authorized visitednetwork identifiers " that stores among the HSS among the 3GPP TS 23.008 is the list of network identifications that allows user capture, but does not explicitly call for the network identity in this tabulation specifically how to distribute.Ordinary circumstance is that what to store in this tabulation is the network identity of P-CSCF, but P-CSCF only is present in home network in the above-mentioned networking mode, so HSS can not distinguish user's roaming according to the network identity of P-CSCF.The permission roaming place of contracting according to the user in this programme, as Shanghai, Guangzhou, the network identity of the SBC of corresponding region is added this tabulation, then when the user registers, HSS can be the network identity of SBC according to the value of the Visited-Network-Identifier AVP in the UAR message just, check the network list of the permission visit that whether is present in the user, thereby effectively user's roaming is controlled.Concrete steps comprise as shown in Figure 4:
After step 402, SBC receive this login request message, in mailing to the Register message of P-CSCF, insert the P-Visited-Network-ID header field and insert the network identity of SBC;
After step 407, I-CSCF receive Register message, the content of wherein P-Visited-Network-ID header field is inserted Visited-Network-Identifier AVP in the UAR message, UAR message is sent to HSS;
Is there the network identity among the Visited-Network-Identifier AVP in the network list of the permission visit of step 409, this PUI correspondence? if, execution in step 410, otherwise execution in step 411;
After step 412, I-CSCF receive UAA in the step 411, generate disable message forbidden and give P-CSCF, registration failure.
In the above-mentioned flow process, SBC inserts the P-Visited-Network-ID header field in login request message after, P-CSCF can not check whether there is this header field, also no longer inserts the P-Visited-Network-ID header field according to prior art, directly login request message is carried out other processing.
P-CSCF follows 3GPP standard TS24.228, TS24.229 to the processing of other fields in the request registration message.
The invention provides a kind of roaming control system that inserts the IP Multimedia System network by session border control network element, under the networking condition that is provided with that is used for that the IP Multimedia System core network element concentrate to be provided with and session border control network element distributes, the user who allows roaming is controlled, comprising:
Network list is provided with module, adds the network identity that one or more session border that allows the user to insert is controlled network element in the list of network identifications that allows user capture;
Session border control network element network identity is provided with module, in agent conversation control function network element forwarding user's IP Multimedia System login request message, insert the P-Visited-Network-ID header field at session border control network element, and insert the network identity of this session border control network element at this header field;
Agent conversation control function network element is used for login request message is handled, after comprising that agent conversation control function network element receives session border control network element forwarding registration request from user message, P-Visited-Network-ID header field is wherein checked, if there is this header field, then agent conversation control function network element is not handled this header field, otherwise agent conversation control function network element is inserted the P-Visited-Network-ID header field, and inserts the network identity of this agent conversation control function network element; Perhaps login request message is treated to the processing of inserting the P-Visited-Network-ID header field after agent conversation control function network element receives session border control network element forwarding registration request from user message.
Agent conversation control function network element nslookup server obtains the inquiry session controlled function network element address of user attaching network, sends login request message to this inquiry session controlled function network element;
Inquiry session controlled function network element is used for the network identity of session boundary Control network element is inserted the Visited-Network-Identifier AVP of user authorization request message;
Home subscriber server is searched the network list that allows user capture according to the public user identity in the user authorization request message, and judges whether to allow the user to insert according to the value of the Visited-Network-IdentifierAVP in the user authorization request message.
Network list is provided with module and is arranged in home subscriber server; Session border control network element network identity is provided with module and is arranged in session border control network element; P-Visited-Network-ID header field detection module is arranged in agent conversation control function network element.
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 (8)
1. roam control method that inserts the IP Multimedia System network by session border control network element, under the networking condition that is provided with that is used for that the IP Multimedia System core network element concentrate to be provided with and session border control network element distributes, the user who allows roaming is controlled, it is characterized in that, comprising:
Step 1 adds the network identity that one or more session border that allows the user to insert is controlled network element in the list of network identifications that allows user capture;
Step 2 is inserted the P-Visited-Network-ID header field at session border control network element in agent conversation control function network element forwarding user's IP Multimedia System login request message, and inserts the network identity of this session border control network element in this header field;
Step 3, agent conversation control function network element is handled login request message, and the nslookup server obtains the inquiry session controlled function network element address of user attaching network, sends login request message to this inquiry session controlled function network element;
Step 4, inquiry session controlled function network element is received structuring user's authorization request message after the login request message, the network identity of the session border in the P-Visited-Network-ID header field wherein control network element is inserted Visited-Network-Identifier AVP in the user authorization request message, user authorization request message is sent to home subscriber server;
Step 5, home subscriber server is searched the list of network identifications of described permission user capture according to the public user identity in the user authorization request message, value to the Visited-Network-Identifier AVP in the home subscriber server message is judged, if this AVP value is present in the list of network identifications of permission user capture of this public user identity correspondence, then allow the user to insert, otherwise do not allow the user to insert.
2. roam control method as claimed in claim 1, it is characterized in that, in the step 3, described agent conversation control function network element is handled login request message and is comprised: after agent conversation control function network element receives session border control network element forwarding registration request from user message, P-Visited-Network-ID header field is wherein checked, if there is this header field, then agent conversation control function network element is not handled this header field, otherwise agent conversation control function network element is inserted the P-Visited-Network-ID header field in login request message, and inserts the network identity of this agent conversation control function network element.
3. roam control method as claimed in claim 1, it is characterized in that, in the step 3, described agent conversation control function network element is treated to the processing of inserting the P-Visited-Network-ID header field in login request message after agent conversation control function network element receives session border control network element forwarding registration request from user message to login request message.
4. as claim 1,2 or 3 described roam control methods, it is characterized in that, between described step 1 and the step 2, also comprise step 41, subscriber equipment is initiated the IP Multimedia System login request message to session border control network element.
5. roaming control system that inserts the IP Multimedia System network by session border control network element, under the networking condition that is provided with that is used for that the IP Multimedia System core network element concentrate to be provided with and session border control network element distributes, the user who allows roaming is controlled, it is characterized in that, comprising:
List of network identifications is provided with module, adds the network identity that one or more session border that allows the user to insert is controlled network element in the list of network identifications that allows user capture;
Session border control network element network identity is provided with module, in agent conversation control function network element forwarding user's IP Multimedia System login request message, insert the P-Visited-Network-ID header field at session border control network element, and in this header field, insert the network identity of this session border control network element;
Described agent conversation control function network element is used for login request message is handled, and the inquiry session controlled function network element address of nslookup server acquisition user attaching network, sends login request message to this inquiry session controlled function network element;
Inquiry session controlled function network element is used to receive structuring user's authorization request message after the login request message, and the network identity of session boundary Control network element is inserted Visited-Network-Identifier AVP in the user authorization request message;
Home subscriber server, search the list of network identifications of described permission user capture according to the public user identity in the user authorization request message, and judge whether to allow the user to insert according to the value of the Visited-Network-Identifier AVP in the home subscriber server message; Wherein, if this AVP value is present in the list of network identifications of permission user capture of this public user identity correspondence, then allows the user to insert, otherwise do not allow the user to insert.
6. roaming control system as claimed in claim 5, it is characterized in that, described agent conversation control function network element is handled login request message and is comprised: after agent conversation control function network element receives session border control network element forwarding registration request from user message, P-Visited-Network-ID header field is wherein checked, if there is this header field, then agent conversation control function network element is not handled this header field, otherwise agent conversation control function network element is inserted the P-Visited-Network-ID header field in login request message, and inserts the network identity of this agent conversation control function network element.
7. roaming control system as claimed in claim 5, it is characterized in that described agent conversation control function network element is treated to the processing of inserting the P-Visited-Network-ID header field to login request message after agent conversation control function network element receives session border control network element forwarding registration request from user message in login request message.
8. roaming control system as claimed in claim 7 is characterized in that, described list of network identifications is provided with module and is arranged in home subscriber server; Session border control network element network identity is provided with module and is arranged in session border control network element; Described agent conversation control function network element also comprises P-Visited-Network-ID header field detection module, is arranged in agent conversation control function network element.
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| CN103685156B (en) * | 2012-09-04 | 2017-01-25 | 中国移动通信集团公司 | Voice call establishing system, method and device applied to LTE (Long Term Evolution) system |
| CN104869027B (en) * | 2014-02-24 | 2018-05-01 | 中国移动通信集团河南有限公司 | A kind of chain circuit detecting method and access device |
| CN104052744B (en) * | 2014-06-16 | 2017-06-16 | 中国联合网络通信集团有限公司 | A kind of service trigger method and device |
| CN106921966B (en) * | 2015-12-24 | 2020-05-26 | 中国电信股份有限公司 | Method, server and system for controlling roaming user to access network |
| CN112615839B (en) * | 2020-12-10 | 2023-08-22 | 帝信科技股份有限公司 | Data transmission system, data transmission method and data transmission device |
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|---|---|---|---|---|
| CN1856163A (en) * | 2005-04-27 | 2006-11-01 | 华为技术有限公司 | Communication system with dialog board controller and its command transmitting method |
| CN1968280A (en) * | 2006-11-23 | 2007-05-23 | 华为技术有限公司 | System and method for detecting and filtering invalid header field |
-
2007
- 2007-08-28 CN CN2007101208844A patent/CN101115232B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1856163A (en) * | 2005-04-27 | 2006-11-01 | 华为技术有限公司 | Communication system with dialog board controller and its command transmitting method |
| CN1968280A (en) * | 2006-11-23 | 2007-05-23 | 华为技术有限公司 | System and method for detecting and filtering invalid header field |
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| CN101115232A (en) | 2008-01-30 |
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