CN103327023A - Method and device for IP multimedia subsystem logout and login - Google Patents
Method and device for IP multimedia subsystem logout and login Download PDFInfo
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- CN103327023A CN103327023A CN2013102562494A CN201310256249A CN103327023A CN 103327023 A CN103327023 A CN 103327023A CN 2013102562494 A CN2013102562494 A CN 2013102562494A CN 201310256249 A CN201310256249 A CN 201310256249A CN 103327023 A CN103327023 A CN 103327023A
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Abstract
The invention discloses a method and device for IP multimedia subsystem logout and login. The method and device is used for optimizing an IMS login process and reducing the times of message exchange so as to lower processing delay in the login process and improve service quality. The method for IMS logout comprises the steps that after a service call session control entity sends a confirmation message which is used for accepting a logout request sent by user equipment to an interrogating call session control entity, a security context timer corresponding to the user equipment is started; when the security context timer is in time-out, the service call session control entity deletes the security context of the user equipment.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of IP Multimedia System IMS cancellation, register method and device.
Background technology
IP Multimedia System (IP Multimedia Subsystem, IMS) register flow path appears under the several scenes, and initial registration, cancellation and periodic registration refresh, change registration, the re-injection volume that access point causes, all can initiate register flow path.In the IMS register flow path, relate to subscriber equipment (User Equipment, UE), agent call conversation control entity (Proxy-CSCF, P-CSCF), query call conversation control entity (Interrogating-CSCF, I-CSCF), service call conversation control entity (Serving-CSCF, S-CSCF) and the Signalling exchange between the ownership place subscription data server (Home Subscriber Server, HSS), application server (Application Server, AS).Wherein, in a plurality of subprocess that comprise, multimedia authentication request between S-CSCF and the HSS (Multimedia Authentication Request, MAR), multimedia authentication responses (Multimedia Authentication Answer, MAA) subprocess, and (the Server Assignment Request of the service assignment request between S-CSCF and the HSS, SAR), service distribution is replied (Server Assignment Answer, SAA) subprocess, third-party registration subprocess all be wherein to relate to amount of calculation larger, the process that elapsed time is many.
And user's behavior can't retrain.The user may be regular nullify, register again afterwards.Particularly when the unstable or network transfer delay of air interface signals, in registration process owing to will take many time, repeated registration again after the user may nullify.Perhaps, because the artificial reason of setting, after nullifying, again registration behind the certain interval of time.Nullify frequently and registration process in, HSS and S-CSCF will carry out the calculating of authentication vector repeatedly, the reading and writing of user data and configuration information, and third-party registration.Cause the registration and unregistration flow process all can take considerable time, thereby cause the user to experience decline, network operations and Signalling exchange load increase the weight of.Especially when great amount of terminals sends registration request simultaneously, can form in the registration message flow set and send, because the IMS core net has little time to process these messages, cause message repeatedly to retransmit so that the pressure of whole network is increasing, thereby so that the IMS core net can't bear.
IMS log off procedure and IMS registration process are relatively independent processes.Especially, in log off procedure, after cancellation was finished, S-CSCF will the safe context of corresponding UE, configuration information and user profile, can delete.Sending 200OK(at S-CSCF to I-CSCF agrees) afterwards, S-CSCF can initiate third party's log off procedure at once, and the information of UE among the AS is set to unregistered attitude.In registration process again, S-CSCF can ask for the safe context related datas such as authentication vector again to HSS; After authentication is passed through, write and obtain configuration information and user profile to HSS; And in the registration final stage, initiate the third party logon procedure to AS.
In sum, in whole registration and log off procedure, the calculating of authentication vector and transmission all occupy a lot of time loss.In log off procedure, to delete safe context parameters such as authentication vector, not only increase the execution action of system, and increase the time loss of whole log off procedure.Simultaneously, if the authentication vector in log off procedure does not use, then in whole process, the calculating of authentication vector and generation are not fully utilized, and then cause the function of network element in the register flow path complicated, and interacting message is more, and the registration process processing delay is longer, system loading is large, and quality of service is poor.
Summary of the invention
The embodiment of the invention provides a kind of IMS cancellation, register method and device, in order to optimizing the IMS register flow path, to reduce the interacting message number of times, thereby reduces the registration process processing delay, promotes quality of service.
A kind of IMS cancellation method that the embodiment of the invention provides comprises:
Service call conversation control entity S-CSCF starts the safe context timer corresponding with this UE after send being used for expression and accepting the affirmation message of the de-registration request that user equipment (UE) sends to query call conversation control entity I-CSCF;
When described safe context timer expiry, described S-CSCF deletes the safe context of this UE.
A kind of IMS register method that the embodiment of the invention provides comprises:
After service call conversation control entity S-CSCF receives the registration request of the user equipment (UE) that query call conversation control entity I-CSCF transmits, overtime if safe context timer corresponding to this UE do not have, then stop this safe context timer;
Whether the access-in point information during the last initiation of the more described UE of described S-CSCF registration request and the access-in point information of this registration request be consistent, if unanimously then use the authentication vector that was not used in the existing safe context of this UE that this UE is carried out authentication; Otherwise, obtain the authentication vector of this UE from home subscriber server HSS this UE carried out authentication.
The embodiment of the invention, service call conversation control entity S-CSCF starts the safe context timer corresponding with this UE after send being used for expression and accepting the affirmation message of the de-registration request that user equipment (UE) sends to query call conversation control entity I-CSCF; When described safe context timer expiry, described S-CSCF deletes the safe context of this UE, therefore when the safe context timer is not overtime, S-CSCF has also kept the safe context of this UE, when this UE registers again, can use the authentication vector that was not used in the existing safe context of this UE that this UE is carried out authentication in the follow-up register flow path, thereby reduced the signaling procedure that obtains the UE authentication vector, so that the function of network element is more succinct in the register flow path, interacting message reduces, reduce the registration process processing delay, system loading reduces, and promotes quality of service.
Description of drawings
The IMS logout flow path schematic diagram that Fig. 1 provides for the embodiment of the invention;
The IMS register flow path schematic diagram that Fig. 2 provides for the embodiment of the invention;
The IMS logout flow path schematic diagram that Fig. 3 provides for the embodiment of the invention;
The IMS register flow path schematic diagram that Fig. 4 provides for the embodiment of the invention;
The IMS register flow path schematic diagram that Fig. 5 provides for the embodiment of the invention;
Fig. 6 nullifies the apparatus structure schematic diagram for the IMS that the embodiment of the invention provides;
The IMS register device structural representation that Fig. 7 provides for the embodiment of the invention.
Embodiment
The embodiment of the invention provides a kind of IMS cancellation, register method and device, in order to optimizing the IMS register flow path, to reduce the interacting message number of times, thereby reduces the registration process processing delay, promotes quality of service.
The technical scheme that the embodiment of the invention provides on the basis of original 3GPP protocol description IMS registration, logout flow path, by optimizing S-CSCF to the contextual management of user security, reaches the effect of the time delay that improves cancellation and register flow path.
Flow process after the technical scheme that the embodiment of the invention provides is improved does not produce large change to existing network, can use in existing IMS network and cluster network.For improving user's experience, improve network performance, very large effect is arranged.In addition, because the flow process after improving is not done large improvement to existing protocol, can be compatible with existing network, and be generalized in the IMS network.
Below in conjunction with accompanying drawing the technical scheme that the embodiment of the invention provides is described.
Referring to Fig. 1, a kind of IP Multimedia System IMS cancellation method that the embodiment of the invention provides comprises:
S101, service call conversation control entity S-CSCF start the safe context timer corresponding with this UE after send being used for expression and accepting the affirmation message of the de-registration request that user equipment (UE) sends to query call conversation control entity I-CSCF;
S102, when described safe context timer expiry, described S-CSCF deletes the safe context of this UE.
Preferably, the de-registration request that described UE sends is registration REGISTER request, and the value of the overtime termination Expires header in this REGISTER request is 0.
Referring to Fig. 2, a kind of IP Multimedia System IMS register method that the embodiment of the invention provides comprises:
After S201, service call conversation control entity S-CSCF receive the registration request of the user equipment (UE) that query call conversation control entity I-CSCF transmits, overtime if safe context timer corresponding to this UE do not have, then stop this safe context timer;
Whether the access-in point information during the last initiation of the more described UE of S202, described S-CSCF registration request and the access-in point information of this registration request be consistent, if unanimously then use the authentication vector that was not used in the existing safe context of this UE that this UE is carried out authentication; Otherwise, obtain the authentication vector of this UE from home subscriber server HSS this UE carried out authentication.
Preferably, the method also comprises:
If described S-CSCF uses the authentication vector that was not used in the existing safe context of this UE that this UE is carried out failed authentication, the authentication vector of then obtaining this UE from HSS is carried out authentication to this UE again.
Preferably, described S-CSCF comprises from the authentication vector that HSS obtains this UE:
S-CSCF sends Cx(Reference Point between a CSCF and an HSS, the reference point between CSCF and the HSS to HSS) authentication Cx-Authentication message, in order to obtain the authentication vector of this UE;
S-CSCF receives the Cx Authentication Response Cx-Authentication Response message that HSS returns, and wherein comprises the authentication vector of this UE.
The safe context of UE described in the embodiment of the invention comprises authentication vector and access-in point information, and wherein said access-in point information comprises the IP address of UE.
Referring to Fig. 3, the IMS log off procedure after the improvement that the embodiment of the invention provides is specific as follows:
Step 31, UE sends registration (REGISTER) request message to P-CSCF.This login request message is the same with the situation of re-injection volume process, is 0 in the overtime value that stops head (Expires header) indicating still, thereby nullifies by this Expires header value indication network side request.P-CSCF when this request is addressed to the UE initial registration.
Step 32, P-CSCF removes the relevant information of safety, and will register (REGISTER) request message and be forwarded to I-CSCF.
Step 33, I-CSCF then can contact HSS, sends Cx inquiry (Cx-Query) message to HSS, with the address of inquiry S-CSCF.
Step 34, HSS issues I-CSCF to the S-CSCF address of choosing by Cx inquiry response (Cx-Query Response) message.
Step 35, I-CSCF is transmitted to new REGISTER request the S-CSCF of selection.
S-CSCF can check that this replys, if incorrect, failed authentication then, register flow path stops.If correct, then authentication success.
Step 36, if S-CSCF checks the authentication success, then S-CSCF will to HSS send Cx push on Cx (Cx-Put the Cx-Pull) message of popping.
Step 37, HSS preserves S-CSCF name that should subscriber equipment, and returns the Cx response Cx that pushes on and pop response (Cx-Put Response Cx-Pull Response) message to S-CSCF.S-CSCF preserves corresponding user profile.
Step 38, S-CSCF sends " 200OK " message to I-CSCF, and this registration is accepted in expression.
After log off procedure was finished, S-CSCF did not temporarily delete the safe context of UE, but started the safe context timer (IMS security Context Timer) of a correspondence, the safe context of deletion UE when the safe context timer overflows.
In original logout flow path, in step 38, S-CSCF is after I-CSCF sends 200OK message, and S-CSCF starts a safe context timer (IMS Security Context Timer).When the safe context timer overflows, then triggered the safe context of this subscriber equipment of deletion by the safe context timer.
Step 39, I-CSCF transmits to P-CSCF should " 200OK " message.
Step 40, P-CSCF sends " 200OK " message to UE.
Step 41, after step 38 was finished, S-CSCF sent registration request (REGISTER) message to application server AS.
Step 42, application server AS is returned " 200OK " message to S-CSCF, and this registration is accepted in expression.
After logout flow path finishes, S-CSCF will delete safe context, user data and the configuration information that UE is correlated with, and and AS between finished third party's log off procedure.
Referring to Fig. 4, in the IMS registration process after the embodiment of the invention is improved, UE is registered to after the S-CSCF, if S-CSCF finds the safe context of UE after nullifying last time, the safe context timer is also not overtime, does not delete safe context.Through comparing the access point address, if consistent, then in this registration process, utilize and nullified not deleted authentication vector last time.S-CSCF no longer needs to initiate the authentication vector acquisition process with HSS.
The detailed step flow process is as follows:
Step 2, P-CSCF processes this REGISTER request, and the REGISTER request is sent to the I-CSCF of selection.
Step 3, I-CSCF then can contact HSS, sends Cx inquiry (Cx-Query) message to HSS, with the address of inquiry S-CSCF.
Step 4, HSS selects S-CSCF, and I-CSCF is issued by Cx inquiry response (Cx-Query Response) message in the S-CSCF address.
Step 5, after finishing the S-CSCF selection, I-CSCF is transmitted to the REGISTER request S-CSCF of selection.
S-CSCF is after receiving registration (REGISTER) request, if safe context timer corresponding to this UE also do not overflow, then S-CSCF stops safe context timer (IMS Security context Timer).
Step 6 and step 7 become optional process.
Behind the safe context timer of this UE that S-CSCF stops to open in log off procedure last time, compare this UE last time registration request access-in point information and the access-in point information of this registration request of this UE, if access-in point information is inconsistent, then initiate step 6 and step 7 process.If access-in point information is consistent, and also there is untapped authentication vector in the safe context of UE, then uses untapped authentication vector, skips steps 6 and step 7.
Step 6, S-CSCF can find that the user is not authorized to, and can send Cx authentication (Cx-Authentication) message to home subscriber server (Home Subscriber Server, HSS), to obtain authorization data.
Step 7, HSS crosses Cx Authentication Response (Cx-Authentication Response) message with the authentication data communication device and returns to S-CSCF.
Step 8, S-CSCF replys to query the user with " 401 unauthorizeds (Unauthorized) ".And message passed to I-CSCF.
Step 9, I-CSCF replys " 401 unauthorizeds (Unauthorized) " and sends to P-CSCF.
Step 10, P-CSCF replys " 401 unauthorizeds (Unauthorized) " and sends to UE.
Step 13, I-CSCF then can contact HSS, sends Cx inquiry (Cx-Query) message to HSS, with the address of inquiry S-CSCF.
Step 14, HSS issues I-CSCF to the S-CSCF address of choosing by Cx inquiry response (Cx-Query Response) message.
Step 15, I-CSCF is transmitted to new REGISTER request the S-CSCF of selection.
S-CSCF can check that this replys, if correct, then authentication success.If incorrect, then S-CSCF can think failed authentication, stops register flow path.Do not carry out MAR and MAA mutual, utilize before the authentication vector of preservation carry out in the situation of failed authentication, S-CSCF also can select to initiate MAR and the MAA of a new round, and the follow-up authentication of again doing.
Step 16, if S-CSCF checks the authentication success, then S-CSCF will to HSS send Cx push on Cx (Cx-Put the Cx-Pull) message of popping.
Step 17, HSS preserves S-CSCF name that should subscriber equipment, and returns the Cx response Cx that pushes on and pop response (Cx-Put Response Cx-Pull Response) message to S-CSCF.S-CSCF preserves corresponding user profile.
Step 18, S-CSCF sends " 200OK " message to I-CSCF, and this registration is accepted in expression.
Step 19, I-CSCF transmits to P-CSCF should " 200OK " message.
Step 20, P-CSCF sends " 200OK " message to UE.
Step 21, S-CSCF sends registration request (REGISTER) message to application server AS.
Step 22, application server AS is returned " 200OK " message to S-CSCF, and this registration is accepted in expression.
If S-CSCF uses the authentication vector that was not used in the existing safe context of this UE that this UE is carried out failed authentication, then S-CSCF carries out authentication to this UE again from the authentication vector that HSS obtains this UE, and at this moment, referring to Fig. 5, the IMS registration process comprises:
Step 51, UE sends a SIP REGISTER request to the P-CSCF that finds.This request can comprise the user identifier that needs are registered.
Step 52, P-CSCF processes this REGISTER request, and the REGISTER request is sent to the I-CSCF of selection.
Step 53, I-CSCF then can contact HSS, sends Cx inquiry (Cx-Query) message to HSS, with the address of inquiry S-CSCF.
Step 54, HSS selects S-CSCF, and I-CSCF is issued by Cx inquiry response (Cx-Query Response) message in the S-CSCF address.
Step 55, after finishing the S-CSCF selection, I-CSCF is transmitted to the REGISTER request S-CSCF of selection.
S-CSCF finds that the safe context timer does not also overflow after receiving registration (REGISTER) request, then S-CSCF stops safe context timer (IMS Security context Timer).
Behind the safe context timer of this UE that S-CSCF stops to open in log off procedure last time, compare this UE last time registration request access-in point information and the access-in point information of this registration request of this UE, when access-in point information is consistent, and also there is untapped authentication vector in the safe context of UE, then uses untapped authentication vector that UE is carried out authentication.
Step 56, S-CSCF replys to query the user with " 401 unauthorizeds (Unauthorized) ".And message passed to I-CSCF.
Step 57, I-CSCF replys " 401 unauthorizeds (Unauthorized) " and sends to P-CSCF.
Step 58, P-CSCF replys " 401 unauthorizeds (Unauthorized) " and sends to UE.
Step 59, UE can calculate replying of this query and send one to P-CSCF and new comprise the REGISTER that this is replied.
Step 60, P-CSCF can find I-CSCF again, and new REGISTER message is sent to I-CSCF.
Step 61, I-CSCF then can contact HSS, sends Cx inquiry (Cx-Query) message to HSS, with the address of inquiry S-CSCF.
Step 62, HSS issues I-CSCF to the S-CSCF address of choosing by Cx inquiry response (Cx-Query Response) message.
Step 63, I-CSCF is transmitted to new REGISTER request the S-CSCF of selection.
S-CSCF can check that this replys, find incorrect, then S-CSCF can think failed authentication, do not carry out MAR and MAA mutual, utilize before the authentication vector of preservation carry out in the situation of failed authentication, S-CSCF also can select to initiate MAR and the MAA of a new round, and the follow-up authentication of again doing.
Step 64, S-CSCF finds that the user is not authorized to, and sends Cx authentication (Cx-Authentication) message to home subscriber server (Home Subscriber Server, HSS), to obtain authorization data.
Step 65, HSS crosses Cx Authentication Response (Cx-Authentication Response) message with the authentication data communication device and returns to S-CSCF.
Step 66, S-CSCF replys to query the user with " 401 unauthorizeds (Unauthorized) ".And message passed to I-CSCF.
Step 67, I-CSCF replys " 401 unauthorizeds (Unauthorized) " and sends to P-CSCF.
Step 68, P-CSCF replys " 401 unauthorizeds (Unauthorized) " and sends to UE.
Step 69, UE can calculate replying of this query and send one to P-CSCF and new comprise the REGISTER that this is replied.
Step 70, P-CSCF can find I-CSCF again, and new REGISTER message is sent to I-CSCF.
Step 71, I-CSCF then can contact HSS, sends Cx inquiry (Cx-Query) message to HSS, with the address of inquiry S-CSCF.
Step 72, HSS issues I-CSCF to the S-CSCF address of choosing by Cx inquiry response (Cx-Query Response) message.
Step 73, I-CSCF is transmitted to new REGISTER request the S-CSCF of selection.
S-CSCF can check that this replys, find correct, then authentication success.
Step 74, if S-CSCF checks the authentication success, then S-CSCF will to HSS send Cx push on Cx (Cx-Put the Cx-Pull) message of popping.
Step 75, HSS preserves S-CSCF name that should subscriber equipment, and returns the Cx response Cx that pushes on and pop response (Cx-Put Response Cx-Pull Response) message to S-CSCF.S-CSCF preserves corresponding user profile.
Step 76, S-CSCF sends " 200OK " message to I-CSCF, and this registration is accepted in expression.
Step 77, I-CSCF transmits to P-CSCF should " 200OK " message.
Step 78, P-CSCF sends " 200OK " message to UE.
Step 79, S-CSCF sends registration request (REGISTER) message to application server AS.
Step 80, application server AS is returned " 200OK " message to S-CSCF, and this registration is accepted in expression.
Referring to Fig. 6, a kind of IP Multimedia System IMS that the embodiment of the invention provides nullifies device, comprising:
Safe context timer start unit 11, be used for to query call conversation control entity I-CSCF send be used for expression and accept the affirmation message of the de-registration request that user equipment (UE) sends after, start the safe context timer corresponding with this UE;
Deletion safe context unit 12 is used for deleting the safe context of this UE when described safe context timer expiry.
Preferably, the de-registration request that described UE sends is registration REGISTER request, and the value of the overtime termination Expires header in this REGISTER request is 0.
Referring to Fig. 7, a kind of IP Multimedia System IMS register device that the embodiment of the invention provides comprises:
Stop safe context timer units 21, overtime if safe context timer corresponding to this UE do not have behind the registration request of receiving the user equipment (UE) that query call conversation control entity I-CSCF transmits, then stop this safe context timer;
Compare authenticating unit 22, whether the access-in point information when being used for the last initiation of more described UE registration request and the access-in point information of this registration request be consistent, if unanimously then use the authentication vector that was not used in the existing safe context of this UE that this UE is carried out authentication; Otherwise, obtain the authentication vector of this UE from home subscriber server HSS this UE carried out authentication.
Preferably, described relatively authenticating unit 22 also is used for:
If use the authentication vector that was not used in the existing safe context of this UE that this UE is carried out failed authentication, the authentication vector of then obtaining this UE from HSS is carried out authentication to this UE again.
Preferably, described relatively authenticating unit 22 specifically is used for when obtaining the authentication vector of this UE from HSS:
Send Cx authentication Cx-Authentication message to HSS, in order to obtain the authentication vector of this UE;
Receive the Cx Authentication Response Cx-Authentication Response message that HSS returns, wherein comprise the authentication vector of this UE.
Preferably, this device is service call conversation control entity S-CSCF.
Preferably, this device also comprises:
Safe context timer start unit 11, be used for to query call conversation control entity I-CSCF send be used for expression and accept the affirmation message of the de-registration request that user equipment (UE) sends after, start the safe context timer corresponding with this UE;
Deletion safe context unit 12 is used for deleting the safe context of this UE when described safe context timer expiry.
Preferably, the de-registration request that described UE sends is registration REGISTER request, and the value of the overtime termination Expires header in this REGISTER request is 0.
The embodiment of the invention, service call conversation control entity S-CSCF starts the safe context timer corresponding with this UE after send being used for expression and accepting the affirmation message of the de-registration request that user equipment (UE) sends to query call conversation control entity I-CSCF; When described safe context timer expiry, described S-CSCF deletes the safe context of this UE, therefore when the safe context timer is not overtime, S-CSCF has also kept the safe context of this UE, when this UE registers again, can use the authentication vector that was not used in the existing safe context of this UE that this UE is carried out authentication in the follow-up register flow path, thereby reduced the signaling procedure that obtains the UE authentication vector, thereby so that the function of network element is more succinct in the register flow path, interacting message reduces, reduce the registration process processing delay, system loading reduces, and promotes quality of service.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt complete hardware implementation example, complete implement software example or in conjunction with the form of the embodiment of software and hardware aspect.And the present invention can adopt the form of the computer program of implementing in one or more computer-usable storage medium (including but not limited to magnetic disc store and optical memory etc.) that wherein include computer usable program code.
The present invention is that reference is described according to flow chart and/or the block diagram of method, equipment (system) and the computer program of the embodiment of the invention.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or the block diagram and/or square frame and flow chart and/or the block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device producing a machine, so that the instruction of carrying out by the processor of computer or other programmable data processing device produces the device that is used for realizing in the function of flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.
These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, so that the instruction that is stored in this computer-readable memory produces the manufacture that comprises command device, this command device is realized the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
These computer program instructions also can be loaded on computer or other programmable data processing device, so that carry out the sequence of operations step producing computer implemented processing at computer or other programmable devices, thereby be provided for realizing the step of the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame in the instruction that computer or other programmable devices are carried out.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (13)
1. an IP Multimedia System IMS cancellation method is characterized in that, the method comprises:
Service call conversation control entity S-CSCF starts the safe context timer corresponding with this UE after send being used for expression and accepting the affirmation message of the de-registration request that user equipment (UE) sends to query call conversation control entity I-CSCF;
When described safe context timer expiry, described S-CSCF deletes the safe context of this UE.
2. method according to claim 1 is characterized in that, the de-registration request that described UE sends is registration REGISTER request, and the value of the overtime termination Expires header in this REGISTER request is 0.
3. an IP Multimedia System IMS register method is characterized in that, the method comprises:
After service call conversation control entity S-CSCF receives the registration request of the user equipment (UE) that query call conversation control entity I-CSCF transmits, overtime if safe context timer corresponding to this UE do not have, then stop this safe context timer;
Whether the access-in point information during the last initiation of the more described UE of described S-CSCF registration request and the access-in point information of this registration request be consistent, if unanimously then use the authentication vector that was not used in the existing safe context of this UE that this UE is carried out authentication; Otherwise, obtain the authentication vector of this UE from home subscriber server HSS this UE carried out authentication.
4. method according to claim 3 is characterized in that, the method also comprises:
If described S-CSCF uses the authentication vector that was not used in the existing safe context of this UE that this UE is carried out failed authentication, the authentication vector of then obtaining this UE from HSS is carried out authentication to this UE again.
5. according to claim 3 or 4 described methods, it is characterized in that, described S-CSCF comprises from the authentication vector that HSS obtains this UE:
S-CSCF sends Cx authentication Cx-Authentication message to HSS, in order to obtain the authentication vector of this UE;
S-CSCF receives the Cx Authentication Response Cx-Authentication Response message that HSS returns, and wherein comprises the authentication vector of this UE.
6. an IP Multimedia System IMS nullifies device, it is characterized in that, this device comprises:
Safe context timer start unit, be used for to query call conversation control entity I-CSCF send be used for expression and accept the affirmation message of the de-registration request that user equipment (UE) sends after, start the safe context timer corresponding with this UE;
Deletion safe context unit is used for deleting the safe context of this UE when described safe context timer expiry.
7. device according to claim 6 is characterized in that, the de-registration request that described UE sends is registration REGISTER request, and the value of the overtime termination Expires header in this REGISTER request is 0.
8. an IP Multimedia System IMS register device is characterized in that, this device comprises:
Stop the safe context timer units, overtime if safe context timer corresponding to this UE do not have behind the registration request of receiving the user equipment (UE) that query call conversation control entity I-CSCF transmits, then stop this safe context timer;
Compare authenticating unit, whether the access-in point information when being used for the last initiation of more described UE registration request and the access-in point information of this registration request be consistent, if unanimously then use the authentication vector that was not used in the existing safe context of this UE that this UE is carried out authentication; Otherwise, obtain the authentication vector of this UE from home subscriber server HSS this UE carried out authentication.
9. device according to claim 8 is characterized in that, described relatively authenticating unit also is used for:
If use the authentication vector that was not used in the existing safe context of this UE that this UE is carried out failed authentication, the authentication vector of then obtaining this UE from HSS is carried out authentication to this UE again.
10. according to claim 8 or 9 described devices, it is characterized in that, described relatively authenticating unit specifically is used for when obtaining the authentication vector of this UE from HSS:
Send Cx authentication Cx-Authentication message to HSS, in order to obtain the authentication vector of this UE;
Receive the Cx Authentication Response Cx-Authentication Response message that HSS returns, wherein comprise the authentication vector of this UE.
11. device according to claim 8 is characterized in that, this device is service call conversation control entity S-CSCF.
12. device according to claim 11 is characterized in that, this device also comprises:
Safe context timer start unit, be used for to query call conversation control entity I-CSCF send be used for expression and accept the affirmation message of the de-registration request that user equipment (UE) sends after, start the safe context timer corresponding with this UE;
Deletion safe context unit is used for deleting the safe context of this UE when described safe context timer expiry.
13. device according to claim 12 is characterized in that, the de-registration request that described UE sends is registration REGISTER request, and the value of the overtime termination Expires header in this REGISTER request is 0.
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