CN101155096A - Registration method and system - Google Patents
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- CN101155096A CN101155096A CNA2006101415869A CN200610141586A CN101155096A CN 101155096 A CN101155096 A CN 101155096A CN A2006101415869 A CNA2006101415869 A CN A2006101415869A CN 200610141586 A CN200610141586 A CN 200610141586A CN 101155096 A CN101155096 A CN 101155096A
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Abstract
The invention discloses a method for logging. In advance Serving Call Session Control Function (S-CSCF) loading information is set up in Home Subscriber Server (HSS). An Interrogating Call Session Control function (I-CSCF) entity receives the request sent from User Equipment (UE) which is in demand for logging in Internet Protocol IP Multimedia Subsystem (IMS), then Home Subscriber Server distributes Serving Call Session Control Function entity of User Equipment. The Home Subscriber Server chooses the entity which is in normal loading status and can deal with Serving Call Session Control Function entity logging by User Equipment, meanwhile send this information to Interrogating Call Session Control Function (I-CSCF) entity. The chosen Serving Call session control function entity deals with the login information in the request of Interrogating call session control function. This invention also disclosed a system using for user login, including Interrogating Call Session Control Function (I-CSCF) entity, Home Subscriber Server (HSS) entity and Serving Call session control function (S-CSCF) entity. This invention can reduce the time delay in login of User Equipment (UE) in condition of the heavy burden of the system.
Description
Technical field
The present invention relates to the access technology in the communication system, relate in particular to register method and system in a kind of Internet protocol (IP) IP multimedia subsystem, IMS (IMS).
Background technology
In third generation communication system, core net (CN) logically can be divided into circuit domain (CS), packet domain (PS) and IMS territory.Wherein, the IMS territory with the PS territory as bearer network, standardized multimedia service is provided on packet switched bearer, realize the session connection and the transfer of data of IP multimedia service, realize multimedia service with the PS territory such as audio frequency, video, text etc., and for IP multimedia application from now on provides the general network architecture, so that the realization of new business.
Present IMS system mainly comprises parts such as home subscriber server (HSS) and CSCF (CSCF) entity.Wherein, HSS preserves IMS user's CAMEL-Subscription-Information as the master data base of mobile subscriber in the network, comprises basic identification, routing iinformation and service profile etc.The CSCF entity comprises three types of proxy CSCF (P-CSCF), serving CSCF (S-CSCF) and Interrogating CSCFs (I-CSCF) etc.The P-CSCF entity be among the IMS with first tie point of user, realize such as multimedia session management functions such as session foundation, change and terminations by session initiation protocol (SIP) between subscriber equipment (UE) and the P-CSCF entity; The S-CSCF entity is in the control core status in the IMS territory, be responsible for UE is carried out register and authentication and session control, execution is at the basic session routing function of UE, and according to the IMS triggering rule that the user contracts, and carries out when condition satisfies that the value-added service route triggers and professional control is mutual; The I-CSCF entity is as the critical point node in IMS territory, provides between the user's service node distribution of this territory, routing inquiry and IMS territory topology function such as to hide.
UE need carry out user's registration before inserting the IMS territory.Fig. 1 shows the flow chart of the register method of existing protocol regulation.Referring to Fig. 1, this method comprises:
In step 101～102, register requirement (Register) message that UE will carry self user profile sends to the P-CSCF entity, and user's registration in IMS territory is carried out in request, and the P-CSCF entity is transmitted to the I-CSCF entity with the login request message that receives.
In step 103～104, the I-CSCF entity is carried on the information of UE in the user authorization request message, send to HSS, request HSS distributes the S-CSCF entity for this UE, after HSS finishes the distribution of S-CSCF entity, the title of this S-CSCF entity is carried in the subscriber authorisation response message, returns to the I-CSCF entity.
In step 105～107, the I-CSCF entity sends login request message to the S-CSCF entity, the registration of this UE of request S-CSCF entity handles; When the S-CSCF entity can be handled the registration of this UE at self, the distribution server request message that carries user profile is sent to HSS; HSS preserves the corresponding relation of S-CSCF entity and UE at self, and returns the distribution server response message to the S-CSCF entity.
In step 108, the S-CSCF entity sends to professional control plane with the user profile of UE, and carries out the business control corresponding to this UE.
In step 109～111, the S-CSCF entity sends 200 OK message by I-CSCF entity and P-CSCF entity to UE, indicates and succeeds in registration.
So far, finish existing register flow path.
Above-mentioned for HSS be that S-CSCF entity that UE distributes is in the register flow path under the normal load.When the S-CSCF entity transshipped, following two kinds of situations can appear:
1. when the S-CSCF entity transships but still can handle the registration of this UE, because the processing speed of this S-CSCF entity and performance all descend to some extent, therefore need be through carrying out the location registration process of this UE after a while, be after the I-CSCF entity need wait for a period of time, can receive the server-assignment device request message that comes from the S-CSCF entity, then the subsequent step of flow process in the execution graph 1.Like this, sending login request message from the I-CSCF entity to the S-CSCF entity needs through after a while to registration is finished, so the registration time delay of UE is longer.
2. in the time of can't handling the registration of this UE when S-CSCF entity overload, after the step 105 of this S-CSCF entity in Fig. 1, issue failed message, indicate the registration that to handle this UE to the I-CSCF entity.Then, the I-CSCF entity is initiated registration to HSS again, and HSS is S-CSCF entity of this UE reallocation, and the I-CSCF entity sends to login request message the S-CSCF entity of redistributing; When the S-CSCF entity of redistributing can be handled the registration of this UE, finish registration according to step 106 to 111 operation.So, owing to need to carry out the assigning process of twice S-CSCF entity at least, then signaling interaction times is more, and the registration time delay of UE is longer.
As seen, in the above two kinds of cases, when S-CSCF entity that HSS distributed was in overload, the registration time delay of UE was longer.And, under first kind of above-mentioned situation, when the S-CSCF entity is in overload, processing speed and performance all descend to some extent, this moment is if add new UE location registration process again, then can further reduce the processing speed and the performance of S-CSCF entity, thereby influence is registered to other UE on this S-CSCF entity.
Summary of the invention
The invention provides a kind of register method, can reduce the time delay of UE registration.
In the method for foundation inventive concept, service call conversation control function S-CSCF load information is set in home subscriber server HSS in advance, this method comprises: A. inquiry CSCF I-CSCF entity receives after requirement that user equipment (UE) sends is registered to request in the internet protocol multi-media sub-system IMS territory, and request HSS is this UE distribution S-CSCF entity; B.HSS selects to be in the normal load state and can to handle the S-CSCF entity that described UE registers, and selected S-CSCF entity information is notified to the I-CSCF entity according to the S-CSCF load information of self preserving; C, the registration to this UE under the request of I-CSCF entity of described selecteed S-CSCF entity are handled.
Preferably, the described I-CSCF entity requests of step B HSS is that described UE distributes the S-CSCF entity to be:
The I-CSCF entity is determined the Capability Requirement to the S-CSCF entity, and user profile and the determined Capability Requirement of UE sent to HSS, and request HSS distributes the S-CSCF entity for this UE.
Preferably, the described HSS of the step B S-CSCF entity selecting to be in the normal load state and can handle described UE registration is:
HSS determines to be in the S-CSCF entity of normal load state according to the S-CSCF load information of self preserving, and selects to satisfy the S-CSCF entity of described Capability Requirement from determined S-CSCF entity.
In registration process, described HSS determines that the S-CSCF entity that is in the normal load state may further include afterwards:
Judge whether there is the S-CSCF entity that to handle this UE registration in the determined S-CSCF entity that is in the normal load state, if then continue to carry out described selection; Otherwise, select a S-CSCF entity that is in overload according to described Capability Requirement, and the information and the overload indication of the selected S-CSCF entity that is in overload sent to the I-CSCF entity, the I-CSCF entity judges that selected S-CSCF entity is temporarily unreachable, and ask HSS to reselect the S-CSCF entity, then return and carry out described steps A.
After described selection is in the normal load state and can handles the S-CSCF entity of described UE registration, may further include:
HSS sends to the I-CSCF entity with the information of selected S-CSCF entity, and the I-CSCF entity is submitted to described S-CSCF entity with the user profile of described UE, asks the registration of this UE of this S-CSCF entity handles.
And the S-CSCF entity detects the load condition of self, when definite load condition changes, the S-CSCF load information among the described HSS is upgraded.
Preferably, set in advance overload threshold and overload discharges thresholding, and described overload threshold discharges thresholding greater than overload, then described S-CSCF entity detects self load condition and is:
The S-CSCF entity that is in the normal load state is compared the load of self with described overload threshold, and whether judges described load greater than overload threshold, if judge that then this S-CSCF entity is an overload by the normal load state exchange; Otherwise, judge that this S-CSCF entity still is in the normal load state;
Be in of load and the described overload release thresholding comparison of the S-CSCF entity of overload, and judge whether described load discharges thresholding less than overload, if judge that then this S-CSCF entity is converted to the normal load state by overload self; Otherwise, judge that this S-CSCF entity still is in overload.
Preferably, set in advance thresholding change-over time, this S-CSCF entity of described judgement is converted to before the normal load state by overload, further comprises:
Whether the load of judging the S-CSCF entity reaches thresholding change-over time less than the duration that described overload discharges thresholding, if judge that then this S-CSCF entity is converted to the normal load state by overload; Otherwise, judge that this S-CSCF entity still is in overload.
Preferably, described S-CSCF load information is the S-CSCF entity title that is in the normal load state, then described S-CSCF load information among the HSS is updated to:
When the S-CSCF entity is overload by the normal load state exchange, the title of this S-CSCF among the HSS is deleted from the described S-CSCF entity title that is in the normal load state; When this S-CSCF entity is converted to the normal load state by overload, the title of this S-CSCF entity among the HSS is joined in the described S-CSCF entity title that is in the normal load state.
Alternately, described S-CSCF load information is the S-CSCF entity title that is in overload, then described S-CSCF load information among the HSS is updated to:
When the S-CSCF entity is overload by the normal load state exchange, the title of this S-CSCF among the HSS is joined in the described S-CSCF entity title that is in overload; When this S-CSCF entity is converted to the normal load state by overload, the title of this S-CSCF entity among the HSS is deleted from the described S-CSCF entity title that is in overload.
Described S-CSCF load information is the load condition of each S-CSCF entity correspondence, then described S-CSCF load information among the HSS is updated to:
When the S-CSCF entity is overload by the normal load state exchange, the load condition of this S-CSCF among the HSS is revised as overload; When this S-CSCF entity is converted to the normal load state by overload, the load condition of this S-CSCF entity among the HSS is revised as the normal load state.
The present invention also provides a kind of system of the user's of being used for registration, also can reduce the time delay of UE registration.
In the system of foundation inventive concept, comprising: inquiry CSCF I-CSCF entity, home subscriber server HSS and service call conversation control function S-CSCF entity, wherein,
The I-CSCF entity is used to receive the register requirement that comes from user equipment (UE), and notice HSS distributes the S-CSCF entity for this UE, receives to come from the S-CSCF entity information of HSS, and asks this S-CSCF entity that the registration of UE is handled;
HSS is used to preserve the S-CSCF load information, reception comes from the notice of the distribution S-CSCF entity of I-CSCF entity, according to the S-CSCF load information of being preserved, selection is in the normal load state and can handles the S-CSCF entity of the registration of this UE, and the information of selected S-CSCF entity is sent to the I-CSCF entity;
The S-CSCF entity is used to receive the request that comes from the I-CSCF entity, and the registration of this UE is handled.
Preferably, described HSS comprises first memory module, scheduler module and first communication module, wherein,
First memory module is used to preserve the S-CSCF load information:
Scheduler module is used to receive the notice of the distribution S-CSCF entity that comes from first communication module, from first memory module, obtain the S-CSCF load information, selection is in the normal load state and can handles the S-CSCF entity of the registration of this UE, and the information of selected S-CSCF entity is sent to first communication module;
First communication module is used to receive the notice of the distribution S-CSCF entity that comes from the I-CSCF entity, and this notice is transmitted to scheduler module, and receives in the information of the S-CSCF of scheduler module entity, and this information is sent to the I-CSCF entity.
Preferably, described S-CSCF entity comprises: second memory module, control module and second communication module, wherein,
Second memory module is used to receive and preserve the UE log-on message that comes from control module;
Control module is used to receive the request that the registration to UE that comes from second communication module is handled, generate expression and can handle the notice of UE registration, this notice is sent to second communication module, reception comes from the UE log-on message of second communication module, the UE log-on message is sent to second memory module, and registering result is sent to second communication module;
Second communication module is used to receive the request that the registration to UE that comes from the I-CSCF entity is handled, this request is sent to control module, reception comes from the expression of control module can handle the notice that UE registers, this notice is sent to HSS, reception comes from the UE log-on message of HSS, this UE log-on message is sent to control module, and receive the registering result that comes from control module, this registering result is sent to the I-CSCF entity.
In this system, described S-CSCF entity can be further used for preserving the overload threshold that sets in advance, overload discharge thresholding and change-over time thresholding, load to this S-CSCF entity detects, discharge thresholding, change-over time thresholding and detected load according to overload threshold, overload, determine the load condition of S-CSCF entity, and when load condition changes, load condition change information is sent to HSS;
Described HSS is further used for receiving the load condition that comes from the S-CSCF entity and changes information, changes respective record in the S-CSCF load information that information updating preserves according to this load condition.
In addition, this system may further include: Proxy Call Session Control Function I-CSCF entity, be used to receive the register requirement that comes from UE, and determine the S-CSCF entity of this UE correspondence, and this register requirement is transmitted to the S-CSCF entity.
In the present invention, preserve the load information of each S-CSCF among the HSS, initiate the registration in IMS territory as UE after, HSS is according to the S-CSCF load information of being preserved, preferential select to be in the S-CSCF entity that normal load state and disposal ability meet Capability Requirement, by the registration of selecteed S-CSCF entity handles UE.Like this, because HSS had obtained the load state of each alternative S-CSCF entity before distributing the S-CSCF entity for UE, selected S-CSCF entity can be finished the registration of UE, therefore the I-CSCF entity need not to ask HSS to redistribute the S-CSCF entity, the number of times of Signalling exchange significantly reduces between each network entity, thereby has reduced the registration time delay of UE effectively.
When the selected S-CSCF entity that can handle this UE registration all was in overload, HSS can only select the S-CSCF entity that transships.In this case, when HSS sends to the I-CSCF entity with the information of S-CSCF entity among the present invention, also send the overload indication.The I-CSCF entity directly asks HSS to redistribute the S-CSCF entity after receiving the overload indication, can avoid like this causing the long situation of UE registration time delay because of the processing that waits as long for overload S-CSCF entity.
And, when the I-CSCF entity is determined S-CSCF entity overload that HSS distributed according to overload indication, do not send login request message to this overload S-CSCF entity, then do not increase task in this S-CSCF entity, its processing speed and performance do not reduce yet, and therefore can guarantee that this overload S-CSCF entity can carry out normal process to the task of being registered in the UE correspondence on self.
Description of drawings
To make clearer above-mentioned and other feature and advantage of the present invention of those of ordinary skill in the art by describe exemplary embodiment of the present invention in detail with reference to accompanying drawing below, in the accompanying drawing:
Fig. 1 is the flow chart of existing register method;
Fig. 2 is the exemplary process diagram according to the register method of inventive concept;
Fig. 3 is the flow chart of S-CSCF load information update method in the embodiment of the invention 1;
Fig. 4 is the flow chart of register method in the embodiment of the invention 1;
Fig. 5 is the flow chart of S-CSCF load information update method in the embodiment of the invention 2;
Fig. 6 is the flow chart of S-CSCF load information update method in the embodiment of the invention 3;
Fig. 7 is the exemplary configurations schematic diagram that is used for the system of user's registration in the embodiment of the invention.
Embodiment
For making purpose of the present invention, technical scheme clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the present invention is described in further detail.
In the present invention, in advance the S-CSCF load information is kept among the HSS,, handles the registration of UE so that HSS selects from the S-CSCF entity that is in the normal load state.Fig. 2 shows the exemplary process diagram according to the register method of inventive concept.Referring to Fig. 2, in step 201, the I-CSCF entity receives after requirement that UE sends is registered to request in the IMS territory, and request HSS is this UE distribution S-CSCF entity.In step 202, HSS selects to be in the normal load state and can to handle the S-CSCF entity that UE registers, and selected S-CSCF entity information is notified to the I-CSCF entity according to the S-CSCF load information of self preserving.In step 203, the registration to this UE under the request of I-CSCF entity of selecteed S-CSCF entity is handled.
Among the present invention, the S-CSCF load information of the last preservation of HSS can be following three kinds of forms: be in the information of the S-CSCF entity of normal load state, the information of S-CSCF entity that is in overload or the load state of all S-CSCF entities.No matter adopt which kind of above-mentioned form, all when the load condition of self changed, notice HSS was so that upgrade corresponding S-CSCF load information for each S-CSCF entity.
Below by three embodiment, describe technical scheme of the present invention in detail.
Embodiment 1
In the present embodiment, the S-CSCF load information of preserving among the HSS is the information that is in the S-CSCF entity of normal load state, and above-mentioned information is stored in the normal S-CSCF tabulation that sets in advance.And in advance for S-CSCF is provided with overload threshold, when load during greater than this overload threshold, the S-CSCF entity is in overload.In addition, can also set in advance overload discharge thresholding and change-over time thresholding, and should overload discharge thresholding less than overload threshold, discharge thresholding and duration less than overload and reach change-over time of setting in advance during thresholding when the load of S-CSCF entity is reduced to from the numerical value that surpasses overload threshold, this S-CSCF entity is got back to the normal load state.When the S-CSCF entity becomes overload by the normal load state or gets back to the normal load state by overload, need the S-CSCF load information among the HSS be upgraded.Above-mentioned overload threshold and overload discharge thresholding can be set by operation maintenance center (OMC) by the network management personnel, and is transferred to the S-CSCF entity by OMC.
Fig. 3 shows the flow chart of S-CSCF load information update method in the present embodiment.Referring to Fig. 3, this method comprises:
In step 301, the S-CSCF entity that is in the normal load state detects the load of self, and determines that according to the overload threshold that sets in advance self is in overload.
In this step, the S-CSCF entity that is in the normal load state is compared the load of self with overload threshold, when load during greater than overload threshold, judges that this S-CSCF entity is in overload.
In step 302～304, the S-CSCF entity sends overload notification (Cx_Overload) message that carries this S-CSCF name to HSS, indicate the S-CSCF entity and be in overload, HSS is according to the overload notification message that receives, determine to be in the S-CSCF entity of overload, and with the deletion from normal S-CSCF tabulation of this entity, then HSS returns overload response (Cx_Overload_ACK) message to the S-CSCF entity, indicates the load condition of finishing the S-CSCF entity and upgrades.
Because what preserve in the normal S-CSCF tabulation in the present embodiment is the information that is in the S-CSCF entity of normal load state, therefore, when HSS receives the overload notification message that shows S-CSCF entity overload, to send information deletion from normal S-CSCF tabulation of the S-CSCF entity of this message, thereby realize the renewal of S-CSCF entity load condition in this tabulation.
In step 305, the S-CSCF entity that is in overload detects the load of self, and discharges thresholding according to the overload that sets in advance and determine that self-recovery arrives the normal load state.
In this step, the S-CSCF entity of overload continue to detect the load of self, discharges under the thresholding and the duration of this little loading condition reaches change-over time during thresholding when load drops to overload, judges that this S-CSCF entity gets back to the normal load state.Discharge thresholding less than overload threshold owing to transshipping in the present embodiment, when the S-CSCF entity makes its load less than overload threshold owing to pending task reduces, the S-CSCF entity still is in overload, have only its load to continue to reduce, up to discharging less than overload after thresholding and duration reach thresholding change-over time, judge that just this S-CSCF entity is in the normal load state.Like this, can avoid loading on of S-CSCF entity to pace up and down around the overload threshold and cause the phenomenon of S-CSCF entity and the continuous interaction message of HSS, i.e. ping-pong, thus reduced the number of times of Signalling exchange effectively.
In step 306～308, the S-CSCF entity sends the overload that carries this S-CSCF name to HSS and discharges notice (Cx_Overload_Rel) message, indicate the S-CSCF entity and return to the normal load state, HSS discharges notification message according to the overload that receives, determine to recover normal S-CSCF entity, and this entity added in the normal S-CSCF tabulation, then HSS returns overload release response (Cx_Overload_Rel_ACK) message to the S-CSCF entity, indicates the load condition of finishing the S-CSCF entity and upgrades.
Here,, the information of sending the S-CSCF entity of this message is added in the normal S-CSCF tabulation again, thereby realize the renewal of S-CSCF entity load condition in this tabulation when HSS receives when showing that the S-CSCF entity recovers normal overload and discharges notification message.
So far, finish the flow process that the S-CSCF load information upgrades in the present embodiment.
Owing to have the S-CSCF load information among the HSS, then present embodiment is when carrying out the UE registration, and HSS preferentially selects from the S-CSCF that is in the normal load state.Fig. 4 shows the flow chart of register method in the present embodiment.Referring to Fig. 4, this method comprises:
In step 401～402, the login request message that UE will carry self user profile sends to the P-CSCF entity, and user's registration in IMS territory is carried out in request, and the P-CSCF entity is transmitted to the I-CSCF entity with the login request message that receives.
After UE has obtained its own IP address, by sending the registration that login request message is initiated to the IMS territory to the P-CSCF entity, and the user profile of carrying in this login request message can comprise: the IP address of public user identity, private user identity, home network area title and UE etc.The P-CSCF entity receives and arrives after the login request message of UE, determine corresponding I-CSCF entity according to the home network area title in this message, then IP address of P-CSCF information, public user identity, private user identity and UE etc. is carried in the login request message, send to the I-CSCF entity, the registration of UE is handled in request.
In step 403～405, the I-CSCF entity is carried on user profile and the S-CSCF Capability Requirement of UE in the user authorization request message, sends to HSS, and request HSS distributes the S-CSCF entity for this UE; HSS is according to S-CSCF load information of self preserving and the S-CSCF Capability Requirement that receives, from the S-CSCF entity that is in the normal load state, select, and the title of selected S-CSCF entity is carried in the subscriber authorisation response message, return to the I-CSCF entity.
Here, after HSS receives the user authorization request message that comes from the I-CSCF entity, from this message, parse user profile and the S-CSCF Capability Requirement of UE, then, selector from the normal S-CSCF tabulation of self preserving is should Capability Requirement and be in the S-CSCF entity of normal load state, and this S-CSCF entity is distributed to this UE.According to 3GPP TS29.228, user authorization request message can be a Cx_Query/Cx_Select_Pull message, and the subscriber authorisation response message can be a Cx_QueryResp/Cx_Select_Pull Resp message.
In step 406～408, the I-CSCF entity sends the login request message of the user profile carry UE, the registration of this UE of request S-CSCF entity handles to the S-CSCF entity; The S-CSCF entity is registered to self with this UE, and the distribution server request message that will carry user profile sends to HSS, indicates the registration of handling this UE; HSS preserves the corresponding relation of S-CSCF entity and UE at self, and returns the distribution server response message to the S-CSCF entity.
In three steps herein, the I-CSCF entity parses the title of S-CSCF entity from the subscriber authorisation response message that comes from HSS, and the user profile of UE is carried in the login request message, sends to this S-CSCF entity.Because this S-CSCF entity is in the normal load state, therefore can handle the registration of this UE.When handling the registration of UE, the S-CSCF entity is preserved the information of P-CSCF entity at self.Then, the S-CSCF entity indicates the registration that can handle this UE by the distribution server request message to HSS, HSS parses user profile from the distribution server request message that receives, preserve together with the S-CSCF entity information, and the distribution server response message is returned to the S-CSCF entity.Then, the S-CSCF entity is kept at the user profile of UE among self.The distribution server request message here can be a Cx_Put/Cx_Pull message, and the distribution server response message can be a Cx_Put Resp/Cx_Pull Resp message.
In step 409, the S-CSCF entity sends to professional control plane with the user profile of UE, and carries out the business control corresponding to this UE.
In step 410～412, the S-CSCF entity sends 200OK message by I-CSCF entity and P-CSCF entity to UE, indicates and succeeds in registration.
Herein, the S-CSCF entity at first sends to the I-CSCF entity with 200 OK message, the I-CSCF entity is given the P-CSCF entity with the 200OK forwards, and discharge the user profile of the UE that is preserved among this I-CSCF, then the P-CSCF entity is preserved the link information of UE in network at self, and sends 200OK message to UE.
So far, finish existing register flow path.
By above-mentioned flow process as seen, initiate the registration in IMS territory as UE after, HSS is according to the S-CSCF entity information of preserving in self normal S-CSCF tabulation, selects to be in the S-CSCF entity that normal load state and disposal ability meet Capability Requirement, by the registration of selecteed S-CSCF entity handles UE.Like this, because HSS had obtained the load state of each alternative S-CSCF entity before distributing the S-CSCF entity for UE, selected S-CSCF entity can be finished the registration of UE, therefore the I-CSCF entity need not to ask HSS to redistribute the S-CSCF entity, the number of times of Signalling exchange significantly reduces between each network entity, thereby has reduced the registration time delay of UE effectively.
In addition, present embodiment is selected can judge in the normal S-CSCF tabulation whether have the S-CSCF entity that satisfies Capability Requirement earlier before the S-CSCF entity in step 404, if then continue the operation of from normal S-CSCF tabulation, selecting in the execution in step 404; Otherwise, when the S-CSCF entity that promptly can handle this UE registration all is in overload, HSS selects a S-CSCF entity that is in overload to handle the registration of this UE according to Capability Requirement, and when the title with this S-CSCF entity is notified to the I-CSCF entity, send the overload indication that shows selected S-CSCF entity overload to the I-CSCF entity.
Receive at the I-CSCF entity under the situation of overload indication, judge this S-CSCF entity for temporarily unreachable, and directly ask HSS to distribute another S-CSCF entity.In other words, after the I-CSCF entity is received the overload indication, return the step 403 in the execution graph 4, request HSS redistributes a S-CSCF entity, and it is temporarily unreachable further to indicate this S-CSCF entity in user authorization request message, please HSS from other meet the S-CSCF entity of Capability Requirement, select, then, continue to carry out registration process according to step 404 among Fig. 4 and subsequent step.As seen, in this case, the I-CSCF entity is no longer asked the registration of transshipping S-CSCF entity handles UE, but directly asks HSS to redistribute.Like this, wait for the time of overload S-CSCF entity owing to saved the I-CSCF entity, so shortened the registration time delay of UE effectively.And I-CSCF does not send login request message to overload S-CSCF entity, does not increase task in this S-CSCF entity, and its processing speed and performance do not reduce yet, and therefore can avoid the UE that is registered on this overload S-CSCF entity is impacted.
Embodiment 2
In the present embodiment, the S-CSCF load information of preserving among the HSS is the information that is in the S-CSCF entity of overload, and above-mentioned information is stored in the overload S-CSCF tabulation that sets in advance.Also overload threshold is set and discharges thresholding for S-CSCF in advance in the present embodiment less than the overload of this overload threshold.When load during greater than this overload threshold, the S-CSCF entity is in overload; Discharge less than overload after thresholding and duration reach thresholding change-over time when the load of S-CSCF entity is reduced to from the numerical value that surpasses overload threshold, this S-CSCF entity is got back to the normal load state.When the S-CSCF entity becomes overload by the normal load state or gets back to the normal load state by overload, the S-CSCF load information among the HSS is upgraded.
Fig. 5 shows the flow chart of S-CSCF load information update method in the present embodiment.Referring to Fig. 5, this method comprises:
In step 501, the S-CSCF entity that is in the normal load state detects the load of self, and determines that according to the overload threshold that sets in advance self is in overload.
Identical with the step 301 among the embodiment 1, the S-CSCF entity is compared the load of self in this step with overload threshold, when load during greater than overload threshold, judges that this S-CSCF entity is in overload.
In step 502～504, the S-CSCF entity sends the overload notification message that carries this S-CSCF name to HSS, indicate the S-CSCF entity and be in overload, HSS is according to the overload notification message that receives, determine to be in the S-CSCF entity of overload, and the information of this entity joined in the overload S-CSCF tabulation, then HSS returns the overload response message to the S-CSCF entity, indicates the load condition of finishing the S-CSCF entity and upgrades.
Because what preserve in the overload S-CSCF tabulation in the present embodiment is the information that is in the S-CSCF entity of overload, therefore, when HSS receives the overload notification message that shows S-CSCF entity overload, the information of sending the S-CSCF entity of this message is added in the overload S-CSCF tabulation.
In step 505, the S-CSCF entity that is in overload detects the load of self, and discharges thresholding according to the overload that sets in advance and determine that self-recovery arrives the normal load state.
The operation of this step is identical with step 305 among the embodiment 1.
In step 506～508, the S-CSCF entity sends the overload that carries this S-CSCF name to HSS and discharges notification message, indicate the S-CSCF entity and return to the normal load state, HSS discharges notification message according to the overload that receives, determine to recover normal S-CSCF entity, and with the deletion from overload S-CSCF tabulation of the information of this entity, then HSS returns overload to the S-CSCF entity and discharges response message, indicates the load condition of finishing the S-CSCF entity and upgrades.
Here, when HSS receives when showing that the S-CSCF entity recovers normal overload and discharges notification message, will send information deletion from overload S-CSCF tabulation of the S-CSCF entity of this message, thereby realize the renewal of S-CSCF entity load condition in this tabulation.
So far, finish the flow process that the S-CSCF load information upgrades in the present embodiment.
Still can finish the registration of UE according to flow process shown in Figure 4 in the present embodiment to the IMS territory.Just as different from Example 1, in the present embodiment when execution in step 404, HSS parses the user profile and S-CSCF Capability Requirement of UE from the user authorization request message that receives after, be not defined as being in the entity of normal load state with being stored in S-CSCF entity in the overload S-CSCF tabulation, selector from determined S-CSCF entity is should the entity of Capability Requirement, and this S-CSCF entity is distributed to this UE.In addition, also can in step 404, select in the present embodiment to judge earlier in the normal S-CSCF tabulation whether have the S-CSCF entity that satisfies Capability Requirement before the S-CSCF entity, and finish follow-up registration process according to the corresponding operating among the embodiment 1.
As seen also can be in the present embodiment by in HSS, preserving the mode of S-CSCF load, make HSS preferentially from normal S-CSCF entity, select, avoid causing the more situation of signaling interaction times to occur, thereby reduced the registration time delay of UE effectively because of I-CSCF entity requests HSS redistributes the S-CSCF entity.And, when HSS can only distribute to this UE with the S-CSCF entity that is in overload, sending the overload indication in the present embodiment to the I-CSCF entity, the I-CSCF entity directly asks HSS to distribute another S-CSCF entity.Wait for the time of overload S-CSCF entity owing to saved the I-CSCF entity, so shortened the registration time delay of UE effectively.Simultaneously, I-CSCF does not send login request message to overload S-CSCF entity, does not increase task in this S-CSCF entity, and its processing speed and performance do not reduce yet, and therefore can avoid the UE that is registered on this overload S-CSCF entity is impacted.
Embodiment 3
In the present embodiment, the S-CSCF load information of preserving among the HSS is the load state information of all S-CSCF correspondences, and above-mentioned information is stored in the S-CSCF load condition tabulation that sets in advance.Identical with embodiment 1 and 2, also overload threshold is set and discharges thresholding for S-CSCF in advance in the present embodiment less than the overload of this overload threshold.When load during greater than this overload threshold, the S-CSCF entity is in overload; Discharge less than overload after thresholding and duration reach thresholding change-over time when the load of S-CSCF entity is reduced to from the numerical value that surpasses overload threshold, this S-CSCF entity is got back to the normal load state.When the S-CSCF entity becomes overload by the normal load state or gets back to the normal load state by overload, the S-CSCF load information among the HSS is upgraded.
Fig. 6 shows the flow chart of S-CSCF load information update method in the present embodiment.Referring to Fig. 6, this method comprises:
In step 601, the S-CSCF entity that is in the normal load state detects the load of self, and determines that according to the overload threshold that sets in advance self is in overload.
Identical with the step 301 among the embodiment 1, the S-CSCF entity is compared the load of self in this step with overload threshold, when load during greater than overload threshold, judges that this S-CSCF entity is in overload.
In step 602～604, the S-CSCF entity sends the overload notification message that carries this S-CSCF name to HSS, indicate the S-CSCF entity and be in overload, HSS is according to the overload notification message that receives, determine to be in the S-CSCF entity of overload, and the load state information of this entity correspondence in the S-CSCF load condition tabulation is updated to overload, then HSS returns the overload response message to the S-CSCF entity, indicates the load condition of finishing the S-CSCF entity and upgrades.
In step 605, the S-CSCF entity that is in overload detects the load of self, and discharges thresholding according to the overload that sets in advance and determine that self-recovery arrives the normal load state.
The operation of this step is identical with step 305 among the embodiment 1.
In step 606～608, the S-CSCF entity sends the overload that carries this S-CSCF name to HSS and discharges notification message, indicate the S-CSCF entity and return to the normal load state, HSS discharges notification message according to the overload that receives, determine to recover normal S-CSCF entity, and the load state information of this entity correspondence in the S-CSCF load condition tabulation is updated to the normal load state, then HSS returns overload release response message to the S-CSCF entity, indicates the load condition of finishing the S-CSCF entity and upgrades.
So far, finish the flow process that the S-CSCF load information upgrades in the present embodiment.
Also can finish the registration of UE in the present embodiment according to flow process shown in Figure 4 to the IMS territory.Just as different from Example 1, in the present embodiment when execution in step 404, HSS parses the user profile and S-CSCF Capability Requirement of UE from the user authorization request message that receives after, load condition is to select in the S-CSCF entity of normal load state from S-CSCF load condition tabulation, find out the entity that meets this Capability Requirement, and this S-CSCF entity is distributed to this UE.Equally, also can in step 404, select in the present embodiment to judge earlier in the normal S-CSCF tabulation whether have the S-CSCF entity that satisfies Capability Requirement before the S-CSCF entity, and finish follow-up registration process according to the corresponding operating among the embodiment 1.
When present embodiment can be handled the registration of UE and be in the S-CSCF entity of normal load state in existence, can avoid causing the more situation of signaling interaction times to occur, thereby reduce the registration time delay of UE effectively because of I-CSCF entity requests HSS redistributes the S-CSCF entity; And, when the S-CSCF of the registration that can handle this UE entity all is in overload, I-CSCF directly sends user-authorization-request again, the processing that can avoid waiting as long for overload S-CSCF entity because of the I-CSCF entity causes the long situation of UE registration time delay, and guarantees that this overload S-CSCF entity can carry out normal process to the task of being registered in other UE correspondences on self.
The present invention also provides a kind of system of the user's of being used for registration, finishes the registration of UE to the IMS territory according to the scheme of above-mentioned three embodiment.The exemplary process diagram of the system that is used for user's registration in the embodiment of the invention has been shown among Fig. 7.Referring to Fig. 7, this system comprises: I-CSCF entity, HSS and S-CSCF entity.Wherein, the I-CSCF entity is used to receive the register requirement that comes from UE, and notice HSS distributes the S-CSCF entity for this UE, receives to come from the S-CSCF entity information of HSS, and asks this S-CSCF entity that the registration of UE is handled.HSS is used to preserve the S-CSCF load information, reception comes from the notice of the distribution S-CSCF entity of I-CSCF entity, according to the S-CSCF load information of being preserved, selection is in the normal load state and can handles the S-CSCF entity of the registration of this UE, and the information of selected S-CSCF entity is sent to the I-CSCF entity; The S-CSCF entity is used to receive the request that comes from the I-CSCF entity, and the registration of this UE is handled.
In the HSS of present embodiment, comprise memory module, scheduler module and communication module.Wherein memory module is used to preserve the S-CSCF load information; Scheduler module is used to receive the notice of the distribution S-CSCF entity that comes from communication module, from memory module, obtain the S-CSCF load information, selection is in the normal load state and can handles the S-CSCF entity of the registration of this UE, and the information of selected S-CSCF entity is sent to communication module; Communication module is used to receive the notice of the distribution S-CSCF entity that comes from the I-CSCF entity, and this notice is transmitted to scheduler module, and receives in the information of the S-CSCF of scheduler module entity, and this information is sent to the I-CSCF entity.
For the S-CSCF entity, comprise memory module, control module and communication module.Wherein, memory module is used to receive and preserve the UE log-on message that comes from control module; Control module is used to receive the request that the registration to UE that comes from communication module is handled, generate expression and can handle the notice of UE registration, this notice is sent to communication module, reception comes from the UE log-on message of communication module, the UE log-on message is sent to memory module, and registering result is sent to communication module; Communication module is used to receive the request that the registration to UE that comes from the I-CSCF entity is handled, this request is sent to control module, reception comes from the expression of control module can handle the notice that UE registers, this notice is sent to HSS, reception comes from the UE log-on message of HSS, this UE log-on message is sent to control module, and receive the registering result that comes from control module, this registering result is sent to the I-CSCF entity.
In addition, the memory module in the S-CSCF entity also preserve the overload threshold that sets in advance, overload discharge thresholding and change-over time thresholding; Control module from memory module, obtain overload threshold, overload discharge thresholding and change-over time thresholding, load to this S-CSCF entity detects, and discharge thresholding, change-over time thresholding and detected load according to the overload threshold that gets access to, overload, determine the load condition of S-CSCF entity, and when load condition changes, load condition change information is sent to communication module; Communication module receives the load condition that comes from control module and changes information, and the load condition change information that receives is sent to HSS.
Correspondingly, communication module among the HSS receives the load condition that comes from the S-CSCF entity and changes information, and the load condition change information that receives is submitted to scheduler module among the HSS; Scheduler module sends to memory module with the load condition change information of this S-CSCF entity, and the notice memory module is upgraded the load information of this S-CSCF entity; Preserve the S-CSCF load information in the memory module, the load condition that receives the S-CSCF entity that comes from scheduler module changes information, changes information according to the load condition that receives, and upgrades the respective record in the S-CSCF load information.
When the definite S-CSCF entity that can handle the registration of this UE of HSS all is in overload, scheduler module among the HSS is selected the overload S-CSCF entity that can handle this registration, and the information of selected S-CSCF entity and overload indication sent to communication module among the HSS, information and overload indication that communication module will come from the S-CSCF entity of scheduler module again send to I-CSCF.The I-CSCF entity is after information that receives the S-CSCF entity that comes from HSS and overload indication, and request HSS redistributes the S-CSCF entity.
For the ease of distinguishing, the memory module that the communication module in the present embodiment among the HSS is called as among first communication module, the HSS is first memory module; Communication module in the S-CSCF entity is that the memory module in second communication module, the S-CSCF entity is second memory module.
Except above-mentioned I-CSCF entity, HSS and S-CSCF entity, the system that is used for user's registration of present embodiment also comprises the P-CSCF entity, this entity receives the register requirement that comes from UE, determines the I-CSCF entity of UE correspondence, and this register requirement is transmitted to the I-CSCF entity.Like this, above-mentioned system can carry out user's registration according to the flow process among Fig. 2 to Fig. 6, shortens the registration time delay effectively, and under the situation of the S-CSCF entity overload of being distributed, other users that are registered on this S-CSCF entity is not impacted.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being made, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (15)
1. a register method is characterized in that, service call conversation control function S-CSCF load information is set in home subscriber server HSS in advance, and this method comprises:
A. inquiry CSCF I-CSCF entity receives after requirement that user equipment (UE) sends is registered to request in the internet protocol multi-media sub-system IMS territory, and request HSS is this UE distribution S-CSCF entity;
B.HSS selects to be in the normal load state and can to handle the S-CSCF entity that described UE registers, and selected S-CSCF entity information is notified to the I-CSCF entity according to the S-CSCF load information of self preserving;
C, the registration to this UE under the request of I-CSCF entity of described selecteed S-CSCF entity are handled.
2. the method for claim 1 is characterized in that, the described I-CSCF entity requests of step B HSS is that described UE distributes the S-CSCF entity to be:
The I-CSCF entity is determined the Capability Requirement to the S-CSCF entity, and user profile and the determined Capability Requirement of UE sent to HSS, and request HSS distributes the S-CSCF entity for this UE.
3. method as claimed in claim 2 is characterized in that, the S-CSCF entity that the described HSS of step B selects to be in the normal load state and can handle described UE registration is:
HSS determines to be in the S-CSCF entity of normal load state according to the S-CSCF load information of self preserving, and selects to satisfy the S-CSCF entity of described Capability Requirement from determined S-CSCF entity.
4. method as claimed in claim 3 is characterized in that, described HSS determines that the S-CSCF entity that is in the normal load state further comprises afterwards:
Judge whether there is the S-CSCF entity that to handle this UE registration in the determined S-CSCF entity that is in the normal load state, if then continue to carry out described selection; Otherwise, select a S-CSCF entity that is in overload according to described Capability Requirement, and the information and the overload indication of the selected S-CSCF entity that is in overload sent to the I-CSCF entity, the I-CSCF entity judges that selected S-CSCF entity is temporarily unreachable, and ask HSS to reselect the S-CSCF entity, then return and carry out described steps A.
5. the method for claim 1 is characterized in that, this method further comprises: the S-CSCF entity detects the load condition of self, when definite load condition changes, the S-CSCF load information among the described HSS is upgraded.
6. method as claimed in claim 5 is characterized in that, sets in advance overload threshold and overload discharges thresholding, and described overload threshold discharges thresholding greater than overload, and then described S-CSCF entity detects self load condition and is:
The S-CSCF entity that is in the normal load state is compared the load of self with described overload threshold, and whether judges described load greater than overload threshold, if judge that then this S-CSCF entity is an overload by the normal load state exchange; Otherwise, judge that this S-CSCF entity still is in the normal load state;
Be in of load and the described overload release thresholding comparison of the S-CSCF entity of overload, and judge whether described load discharges thresholding less than overload, if judge that then this S-CSCF entity is converted to the normal load state by overload self; Otherwise, judge that this S-CSCF entity still is in overload.
7. method as claimed in claim 6 is characterized in that, sets in advance thresholding change-over time, and this S-CSCF entity of described judgement is converted to before the normal load state by overload, further comprises:
Whether the load of judging the S-CSCF entity reaches thresholding change-over time less than the duration that described overload discharges thresholding, if judge that then this S-CSCF entity is converted to the normal load state by overload; Otherwise, judge that this S-CSCF entity still is in overload.
8. as claim 6 or 7 described methods, it is characterized in that described S-CSCF load information is the S-CSCF entity title that is in the normal load state, then described S-CSCF load information among the HSS be updated to:
When the S-CSCF entity is overload by the normal load state exchange, the title of this S-CSCF among the HSS is deleted from the described S-CSCF entity title that is in the normal load state; When this S-CSCF entity is converted to the normal load state by overload, the title of this S-CSCF entity among the HSS is joined in the described S-CSCF entity title that is in the normal load state.
9. as claim 6 or 7 described methods, it is characterized in that described S-CSCF load information is the S-CSCF entity title that is in overload, then described S-CSCF load information among the HSS be updated to:
When the S-CSCF entity is overload by the normal load state exchange, the title of this S-CSCF among the HSS is joined in the described S-CSCF entity title that is in overload; When this S-CSCF entity is converted to the normal load state by overload, the title of this S-CSCF entity among the HSS is deleted from the described S-CSCF entity title that is in overload.
10. as claim 6 or 7 described methods, it is characterized in that described S-CSCF load information is the load condition of each S-CSCF entity correspondence, then described S-CSCF load information among the HSS be updated to:
When the S-CSCF entity is overload by the normal load state exchange, the load condition of this S-CSCF among the HSS is revised as overload; When this S-CSCF entity is converted to the normal load state by overload, the load condition of this S-CSCF entity among the HSS is revised as the normal load state.
11. a system that is used for user's registration is characterized in that this system comprises: inquiry CSCF I-CSCF entity, home subscriber server HSS and service call conversation control function S-CSCF entity, wherein,
The I-CSCF entity is used to receive the register requirement that comes from user equipment (UE), and notice HSS distributes the S-CSCF entity for this UE, receives to come from the S-CSCF entity information of HSS, and asks this S-CSCF entity that the registration of UE is handled;
HSS is used to preserve the S-CSCF load information, reception comes from the notice of the distribution S-CSCF entity of I-CSCF entity, according to the S-CSCF load information of being preserved, selection is in the normal load state and can handles the S-CSCF entity of the registration of this UE, and the information of selected S-CSCF entity is sent to the I-CSCF entity;
The S-CSCF entity is used to receive the request that comes from the I-CSCF entity, and the registration of this UE is handled.
12. system as claimed in claim 11 is characterized in that, described HSS comprises first memory module, scheduler module and first communication module, wherein,
First memory module is used to preserve the S-CSCF load information;
Scheduler module is used to receive the notice of the distribution S-CSCF entity that comes from first communication module, from first memory module, obtain the S-CSCF load information, selection is in the normal load state and can handles the S-CSCF entity of the registration of this UE, and the information of selected S-CSCF entity is sent to first communication module;
First communication module is used to receive the notice of the distribution S-CSCF entity that comes from the I-CSCF entity, and this notice is transmitted to scheduler module, and receives in the information of the S-CSCF of scheduler module entity, and this information is sent to the I-CSCF entity.
13. method as claimed in claim 11 is characterized in that, described S-CSCF entity comprises: second memory module, control module and second communication module, wherein,
Second memory module is used to receive and preserve the UE log-on message that comes from control module;
Control module is used to receive the request that the registration to UE that comes from second communication module is handled, generate expression and can handle the notice of UE registration, this notice is sent to second communication module, reception comes from the UE log-on message of second communication module, the UE log-on message is sent to second memory module, and registering result is sent to second communication module;
Second communication module is used to receive the request that the registration to UE that comes from the I-CSCF entity is handled, this request is sent to control module, reception comes from the expression of control module can handle the notice that UE registers, this notice is sent to HSS, reception comes from the UE log-on message of HSS, this UE log-on message is sent to control module, and receive the registering result that comes from control module, this registering result is sent to the I-CSCF entity.
14. system as claimed in claim 11, it is characterized in that, described S-CSCF entity be further used for preserving the overload threshold that sets in advance, overload discharge thresholding and change-over time thresholding, load to this S-CSCF entity detects, discharge thresholding, change-over time thresholding and detected load according to overload threshold, overload, determine the load condition of S-CSCF entity, and when load condition changes, load condition change information is sent to HSS;
Described HSS is further used for receiving the load condition that comes from the S-CSCF entity and changes information, changes respective record in the S-CSCF load information that information updating preserves according to this load condition.
15. as any described system in the claim 11 to 14, it is characterized in that, this system further comprises: Proxy Call Session Control Function I-CSCF entity, be used to receive the register requirement that comes from UE, determine the S-CSCF entity of this UE correspondence, and this register requirement is transmitted to the S-CSCF entity.
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| CNA2006101415869A CN101155096A (en) | 2006-09-30 | 2006-09-30 | Registration method and system |
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| CNA2006101415869A CN101155096A (en) | 2006-09-30 | 2006-09-30 | Registration method and system |
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| CN102355451A (en) * | 2011-08-09 | 2012-02-15 | 大唐移动通信设备有限公司 | Method for designating serving-call session control function in registration process and device thereof |
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| CN103141068A (en) * | 2010-10-01 | 2013-06-05 | 瑞典爱立信有限公司 | Service based release of a subscriber registrar server from a signalling path in an internet protocol communication network |
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| CN103141068A (en) * | 2010-10-01 | 2013-06-05 | 瑞典爱立信有限公司 | Service based release of a subscriber registrar server from a signalling path in an internet protocol communication network |
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| CN102355451A (en) * | 2011-08-09 | 2012-02-15 | 大唐移动通信设备有限公司 | Method for designating serving-call session control function in registration process and device thereof |
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| CN104735664A (en) * | 2015-03-12 | 2015-06-24 | 大唐移动通信设备有限公司 | Authentication method and device |
| CN104735664B (en) * | 2015-03-12 | 2018-08-03 | 大唐移动通信设备有限公司 | A kind of method for authenticating and device |
| CN108243403A (en) * | 2016-12-26 | 2018-07-03 | 中国移动通信集团河南有限公司 | A kind of method and I-CSCF network elements for controlling VoLTE user's registrations S-CSCF |
| CN108243403B (en) * | 2016-12-26 | 2021-01-01 | 中国移动通信集团河南有限公司 | Method for controlling VoLTE user to register S-CSCF and I-CSCF network element |
| CN110247785A (en) * | 2018-03-07 | 2019-09-17 | 中国移动通信集团设计院有限公司 | A kind of Registration Delay analysis method and device |
| CN110247785B (en) * | 2018-03-07 | 2022-02-25 | 中国移动通信集团设计院有限公司 | Registration delay analysis method and device |
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