CN102572788B - Inter-communication system (ICS) and communication method and communication device based on same - Google Patents
Inter-communication system (ICS) and communication method and communication device based on same Download PDFInfo
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Abstract
The invention discloses an inter-communication system (ICS) system and a communication method and a communication device based on the same. The ICS system mainly comprises a mobile switching center (MSC) group; the MSC group comprises at least one visited mobile switching center (VMSC) and an emergency mobile switching center (EMSC); and the VMSC is used for communicating with an information management system (IMS) network through the EMSC contained in the MSC group. After the technical scheme is adopted, the VMSC can communicates with the IMS network through the EMSC contained in the MSC group by setting the MSC group which comprises at least one VMSC and one EMSC. Compared with the prior art, each VMSC in a communication system (CS) network does not need to be upgraded into EMSC, so that the number of the VMSC to be upgraded is reduced based on the ensured normal communication, the efficiency in realizing the ICS system is improved, and system resources are saved.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of ICS system, the communication means based on ICS system and communicator.
Background technology
Integrated services and the network integration are the inexorable trends of next generation network development, IMS (IP MultimediaSubsystem, IP Multimedia System) be the technical guarantee that realizes integrated services and the network integration, it is extensively admitted the core network technology that becomes next generation network.In development IMS, also need to guarantee business consistency and the business continuance from the user of CS (Circuit Switched, circuit switching) territory access.But in existing network, CS territory user's business provides with Service control and all completes in CS territory, itself and IMS network are independently.Under this network architecture, because Service control is dispersed in the different network system of two covers, be therefore difficult to the coherence and continuity that guarantees that customer service is experienced.Meanwhile, the O&M cost of concurrent maintenance two cover business networks also can improve greatly.In order to address this problem, 3GPP has proposed ICS (IMS Control System, IMS centralized traffic control system) scheme, the core of ICS is thought to being to realize by IMS is unified that business provides and Service control, CS territory is only as a kind of access means, and user can be by CS territory access IMS network.
The system architecture of the ICS scheme that 3GPP proposes in TS23.292 as shown in Figure 1, core network element in this Fig. 1 is EMSC (Enhanced Mobile Switching Center, the mobile switching centre strengthening), this EMSC is by all VMSC (the Visit MSC in existing network, visited MSC) upgrading obtains, and the effect of the EMSC after upgrading is mainly that CS territory user is linked in IMS network.Its function comprises: former VMSC function; Acting on behalf of CS territory user registers at IMS network etc.
System architecture based on shown in Fig. 1, when CS territory user registers to EMSC, EMSC can act on behalf of this user and register or re-injection volume at IMS.EMSC can generate an IMPU (IMS public subscriber identification) according to user's IMSI (InternationalMobile SubscriberIdentification Number, mobile identification number), and this IMPU is for registration and subsequent voice calls.When user calls out, EMSC changes SIP signaling and NAS signaling.
In the ICS scheme proposing at above-mentioned 3GPP, using EMSC as CS territory user, to the access point in IMS network, this network element is upgraded by VMSC, consider mobile subscriber's roaming simultaneously, need to VMSC whole in network be upgraded, in upgrading process, there are the following problems for possibility:
Because the quantity of the VMSC in existing network is very many, therefore whole VMSC to be upgraded, system upgrade efficiency is low, and need to expend a large amount of system resource.
Summary of the invention
In view of this, the embodiment of the present invention provides a kind of ICS system, the communication means based on ICS system and communicator, adopts this technical scheme, has improved the efficiency that realizes ICS system, and has saved the system resource expending.
The embodiment of the present invention is achieved through the following technical solutions:
According to the embodiment of the present invention aspect, provide a kind of IMS centralized traffic to control ICS system, comprising:
MSC group is set, and this MSC group comprises the EMSC of mobile switching centre of at least one VMSC and an enhancing;
The EMSC realization that described VMSC comprises by place MSC group is communicated by letter with IP Multimedia System IMS network.
According to another aspect of the embodiment of the present invention, a kind of communication means based on above-mentioned ICS system is also provided, comprising:
The user terminal with IP Multimedia System IMS network that user terminal in Visited Mobile Switching Center VMSC receiving circuit exchange CS network sends carries out the request of voice communication;
Described VMSC is forwarded to the request of described voice communication the EMSC of mobile switching centre of the enhancing in the MSC group of place.
According to another aspect of the embodiment of the present invention, a kind of communication means based on above-mentioned ICS system is also provided, comprising:
The second user terminal with circuit switching (CS) network that the EMSC of mobile switching centre strengthening receives that first user terminal in IP Multimedia System IMS network sends carries out the request of voice communication;
Described EMSC is forwarded in the Visited Mobile Switching Center MSC group of place and VMSC described the second user terminal ownership by the request of described voice communication.
According to another aspect of the embodiment of the present invention, a kind of communication means based on above-mentioned ICS system is also provided, comprising:
The position updating request that user terminal in the described CS network that attaching position register HLR reception Visited Mobile Switching Center VMSC in circuit switching (CS) network forwards sends;
Described HLR, according to the corresponding relation of the EMSC of mobile switching centre of the VMSC in each MSC group of preserving and enhancing, determines the EMSC corresponding with the VMSC that forwards described position updating request, and sends position update notification to the described EMSC determining.
According to another aspect of the embodiment of the present invention, a kind of communicator based on above-mentioned ICS system is also provided, comprising:
Request reception unit, the user terminal with IP Multimedia System IMS network sending for the user terminal of receiving circuit exchange CS network carries out the request of voice communication;
Request retransmission unit, for being forwarded to the request of the voice communication of described request receiving element reception the EMSC of mobile switching centre of the enhancing of place MSC group.
According to another aspect of the embodiment of the present invention, a kind of communicator based on above-mentioned ICS system is also provided, comprising:
Request reception unit, carries out the request of voice communication for the second user terminal with circuit switching (CS) network that receives that the first user terminal of IP Multimedia System IMS network sends;
Request retransmission unit, is forwarded to place Visited Mobile Switching Center MSC group and VMSC described the second user terminal ownership for the request of voice communication that described request receiving element is received.
According to another aspect of the embodiment of the present invention, a kind of communicator based on above-mentioned ICS system is also provided, comprising:
Request reception unit, the position updating request sending for receiving the user terminal of the circuit switching (CS) network of Visited Mobile Switching Center VMSC forwarding;
Request retransmission unit, be used for according to the VMSC of each MSC group preserving and the corresponding relation of the EMSC of mobile switching centre of enhancing, determine the EMSC corresponding with the VMSC that forwards described position updating request, and send position update notification to the described EMSC determining.
The ICS system that the technique scheme that provides by the embodiment of the present invention realizes, comprises MSC group is set, this MSC group comprises at least one VMSC and an EMSC, and VMSC realizes and the communicating by letter of IMS network for the EMSC comprising by place MSC group.Adopt this technical scheme, the MSC group that comprises at least one VMSC and an EMSC by setting, EMSC that VMSC can comprise by place MSC group is realized and the communicating by letter of IMS network, with respect to prior art, without each VMSC that CS network is comprised, upgrade to EMSC, thereby guaranteeing on the basis of proper communication, reduced the quantity of upgrading VMSC, improve the efficiency that realizes ICS system, saved system resource.
Other features and advantages of the present invention will be set forth in the following description, and, partly from specification, become apparent, or understand by implementing the present invention.Object of the present invention and other advantages can be realized and be obtained by specifically noted structure in the specification write, claims and accompanying drawing.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for specification, is used from explanation the present invention with the embodiment of the present invention one, is not construed as limiting the invention.In the accompanying drawings:
The ICS system architecture that Fig. 1 provides for prior art;
The ICS system schematic one that Fig. 2 provides for the embodiment of the present invention one;
The ICS system schematic two that Fig. 3 provides for the embodiment of the present invention one;
The implementation method flow chart of the ICS system that Fig. 4 provides for the embodiment of the present invention one;
The communication means flow chart that Fig. 5 provides for the embodiment of the present invention one;
The audio call flow process figure of the user terminal in the user terminal call IMS network in the CSS network that Fig. 6 provides for the embodiment of the present invention one;
The communication means flow chart that Fig. 7 provides for the embodiment of the present invention one;
User terminal in the IMS network that Fig. 8 provides for the embodiment of the present invention one is called out the audio call flow process figure of the user terminal in CSS network;
The communication means flow chart that Fig. 9 provides for the embodiment of the present invention one;
The flow chart that in the CS network that Figure 10 provides for the embodiment of the present invention one, user carries out IMS registration;
The communicator schematic diagram that Figure 11 provides for the embodiment of the present invention two;
The communicator schematic diagram that Figure 12 provides for the embodiment of the present invention two;
The communicator schematic diagram that Figure 13 provides for the embodiment of the present invention two.
Embodiment
In order to provide to improve, realize the efficiency of ICS system and the implementation of saving system resource, the embodiment of the present invention provides a kind of ICS system, the communication means based on ICS system and communicator, below in conjunction with Figure of description, the preferred embodiments of the present invention are described, be to be understood that, preferred embodiment described herein only, for description and interpretation the present invention, is not intended to limit the present invention.And in the situation that not conflicting, embodiment and the feature in embodiment in the application can combine mutually.
Embodiment mono-
The communication means that the embodiment of the present invention one provides a kind of ICS system and realized based on this ICS system.
Particularly, this ICS system as shown in Figure 2, mainly comprises:
MSC group is set, and in practical application, MSC group can be for one or more, and this Fig. 3 shows 3 MSC groups as example, wherein:
Each MSC group comprises at least one VMSC and an EMSC;
VMSC realizes and the communicating by letter of IMS network for the EMSC that comprises by place MSC group.
In practical application, the EMSC that each the MSC group in above-mentioned ICS system comprises can be obtained by VMSC upgrading of selecting from this MSC group, also deployment server separately, and configure the function of EMSC for it.
Particularly, a plurality of VMSCs of the address institute corresponding region of each MSC group that the system described in Fig. 2 comprises by each VMSC that CS network is comprised in same setting range determine and obtain, and a plurality of VMSC that MSC group comprises are positioned at same position region; Or determine and obtain lower than a plurality of VMSC of setting threshold by total load amount corresponding to each VMSC that CS network is comprised, total load amount corresponding to a plurality of VMSC that MSC group comprises is lower than setting threshold.
In the preferred implementation that the embodiment of the present invention one provides, the information of preserving the EMSC in the MSC group of its place in the VMSC in each MSC group that the system described in Fig. 2 comprises, VMSC in this each MSC group, for the user terminal with IMS network that receives that the user terminal of CS network sends, carry out the request of voice communication, the request that forwards this voice communication according to the information of the EMSC in the place MSC group of preserving is to the EMSC in the MSC group of place;
Correspondingly, EMSC, processes for the request to this voice communication, and the request of this voice communication is routed to the network equipment (as S-CSCF) in IMS network.Particularly, EMSC is existing procedure to the handling process of this voice communication, repeats no more herein.
In the preferred implementation that the embodiment of the present invention one provides, the EMSC that system described in Fig. 2 comprises, for what receive that the user terminal of IMS network sends, carry out the request of voice communication with the user terminal of CS network, the request of this voice communication is forwarded to the VMSC of the user terminal ownership in CS network;
Correspondingly, VMSC, for the request of the voice communication receiving is processed, according to the user terminal in the request call CS network of this voice communication.Particularly, VMSC is existing procedure to the handling process of this voice communication, repeats no more herein.
As shown in Figure 3, in the preferred implementation that the embodiment of the present invention one provides, system described in Fig. 2 can further include HLR, in Fig. 3 for brevity, only show the annexation of a MSC group and HLR, in practical application, VMSC and EMSC in each MSC group that ICS system comprises need to be connected with HLR.
In this HLR, preserve the corresponding relation of VMSC and EMSC in each MSC group, this HLR is for after the position updating request of user terminal that receives the CS network that VMSC forwards, according to this corresponding relation of preserving, the EMSC corresponding to the VMSC with forwarding position updating request sends position update notification;
Correspondingly, EMSC, processes for the position update notification that HLR is forwarded, and the reposition that is about to user terminal is registered to IMS network.Particularly, EMSC is existing procedure to the handling process of position update notification, repeats no more herein.
Take below the VMSC in CS network is upgraded to EMSC as example, the specific implementation process of above-mentioned ICS system is elaborated.
As shown in Figure 4, the implementation procedure of the ICS system that the embodiment of the present invention one provides, mainly comprises the steps:
Step 401, the VMSC that CS network is comprised are defined as at least one MSC group.
In this step, each the MSC group obtaining comprises at least 1 VMSC, and generally, in order to reduce the upgrading quantity of VMSC, MSC group can comprise a plurality of VMSC.
Step 402, from each MSC group, select a VMSC to upgrade to EMSC.
So far, the realization flow of ICS system finishes.In order to understand better the embodiment of the above-mentioned ICS of the realization system of the present invention, below to realizing the preferred implementation of each step that above-mentioned flow process comprises, be elaborated.
In the preferred embodiment of the present invention, shown in Fig. 4 in the step 401 of flow process, the VMSC that CS network is comprised is defined as at least one MSC group, a plurality of VMSC that CS network comprised divide into groups, and a plurality of VMSC are defined as to a group, according to the embodiment of the present invention, can determine arbitrarily MSC group, for example, set the VMSC quantity that each MSC group comprises, according to this quantity, determine MSC group.In practical application, consider distribution and the load condition of VMSC in existing CS network, can preferably by following any one mode, realize the grouping to VMSC:
The preferred implementation one of VMSC grouping
The address of each VMSC comprising according to CS network, a plurality of VMSC by the address institute corresponding region of VMSC in same setting range are defined as a MSC group.
In this preferred implementation one, can according to the address of VMSC (being generally IP address), determine the region at this VMSCS place, then according to the region at each VMSC place, VMSC be divided into groups.For example, a plurality of VMSC that are Yi Geshenghuo city by region corresponding to IP address are defined as a MSC group.According to this, determine mode, because each VMSC in a MSC group belongs to a region, therefore, can reduce the expense of communicating by letter between each VMSC, and be convenient to maintenance management.
The preferred implementation two of VMSC grouping
The load of each VMSC comprising according to CS network, is defined as a MSC group by corresponding total load amount lower than a plurality of VMSC of setting threshold.
In this preferred implementation two, can consider the load of VMSC, for example, the telephone traffic of VMSC carrying etc., have set the higher limit of the total load amount of each VMSC that is confirmed as a MSC group, thus the load of the VMSC in balanced MSC group.
Above layoutprocedure can realize by the configuration server of network side in actual applications, in this configuration server, preserve the address information of each VMSC in CS network, and in this configuration server, also preserve as required, the load information of the VMSC collecting in each VMSC running.The information that this configuration server is preserved, for when realizing ICS system, provides the foundation that VMSC is divided into groups.
In the preferred embodiment of the present invention, shown in Fig. 4 in the step 402 of flow process, from each MSC group, select a VMSC to upgrade to EMSC, can preferably select a minimum VMSC of load in this MSC group to upgrade to EMSC, or select the VMSC that in this MSC group, hardware device ability is the highest to upgrade to EMSC, in concrete application, can select flexibly according to the actual requirements, will not enumerate herein.
In the embodiment of the present invention one, by above-mentioned flow process, realizing after ICS system, from each MSC group, select a VMSC upgrade to EMSC or dispose separately after EMSC, need to, further according to the follow-up communication type realizing based on this ICS system, the corresponding entity in network be configured.Take below the communication type that will realize as: position is upgraded, voice communication is elaborated as example:
Layoutprocedure (be about to new position and be registered to the process in IMS network) while realizing the position updating request business that user terminal in CS network sends, comprising:
In HLR in CS network, preserve VMSC in each MSC group and the corresponding relation of EMSC.This corresponding relation of preserving according to HLR, after the position updating request of the user terminal of HLR in the CS network that receives VMSC forwarding, can be according to this corresponding relation, determine the EMSC corresponding with the VMSC that forwards this position updating request, and send position update notification to this EMSC determining, to indicate this EMSC to carry out subsequent treatment to this position updating request.Handling process will illustrate in subsequent embodiment in detail, wouldn't describe herein.
Realize that user terminal in CS network sends with IMS network in the layoutprocedure of user terminal while carrying out voice communication service, comprising:
In VMSC in each MSC group, preserve the information of the EMSC in the MSC group of place.This information of preserving according to the VMSC in each MSC group, the user terminal with IMS network that the user terminal of VMSC in receiving CS network sends carries out after the request of voice communication, and the request that can forward this voice communication according to this information of preserving is to the EMSC in the MSC group of place.Handling process will illustrate in subsequent embodiment in detail, wouldn't describe herein.
Realize that user terminal in IMS network sends with CS network in the layoutprocedure of user terminal while carrying out voice communication service, comprising:
In EMSC, preserve the corresponding relation of user terminal number (as number section) and VMSC.The user terminal with CS network that the user terminal of EMSC in receiving IMS network sends carries out after the request of voice communication, according to this corresponding relation, the request of this voice communication is forwarded to corresponding VMSC and processes.In EMSC, also can not configure this corresponding relation, by inquiry, HLR determines this VMSC.Handling process will illustrate in subsequent embodiment in detail, wouldn't describe herein.
The ICS system that the technique scheme providing by the embodiment of the present invention one realizes, has improved the efficiency that system realizes, and has saved the spent system resource of system upgrade, simultaneously can be by the various communication services of the required realization of simple Configuration.
Communication function for the ICS system of understanding better the embodiment of the present invention one and providing realizes, describes the detailed process of the communication service realizing based on this ISC system below in conjunction with different business.
Caller handler flow process
In this caller handler flow process, the user terminal in CS network is as calling terminal, and the user terminal in IMS network is as terminal called.
Specifically as shown in Figure 5, this communication means mainly comprises the steps:
The user terminal with IMS network that step 501, VMSC receive that user terminal in CS network sends carries out the request of voice communication.
Step 502, VMSC are forwarded to the EMSC in the MSC group of place by this request.
The request that the user terminal with IMS network user terminal in CS network being sent at VMSC carries out voice communication is forwarded to after the EMSC in its place group, EMSC, by the corresponding S-CSCF of user terminal number in this IMS network recording in IMS registration process (being the down hop network element of EMSC in calling procedure), is routed directly to the S-CSCF in IMS network by the request of this voice communication.Concrete handling process is existing communication flow process, repeats no more herein.
In practical application, in above-mentioned steps 502, VMSC is forwarded to the EMSC in the MSC group of place by this request, can be in the following way:
VMSC, according to the information of the EMSC in the place MSC group of preserving, is forwarded to the EMSC in the MSC group of place by this request.
In flow process described in Fig. 5, EMSC need to be responsible for accessing the signaling conversion of the user terminal of the VMSC in its place group, and therefore, in the voice communication flow process of the user terminal in CS network as caller, VMSC need to route the call to EMSC.VMSC in existing network has the ability to route the call to according to user's signing attribute the MSC that configured in advance is good, can utilize this ability, VMSC is carried out to data configuration, the MSC of down hop is configured to the EMSC in this zonule, so just can be implemented to the call routing of EMSC.
The detailed signaling process of the audio call flow process of the user terminal in the above-mentioned user terminal call IMS network of realizing in CS network, as shown in Figure 6, comprises the steps:
User equipment (UE) in step 601, CS network sends call request (by SETUP signaling bear) to the VMSC of its ownership.
Step 602, VMSC are redirected the EMSC in the MSC group of its place.
Step 603, VMSC send to the call request of UE the EMSC (by interoffice signaling IAM) being redirected to.
Step 604, EMSC send this call request (by IMS signaling) to IMS equipment of the core network (S-CSCF).
Step 605, IMS equipment of the core network send user terminal in IMS network just in the information of ring to EMSC.
Step 606, EMSC are to VMSC feedback addresses total regression (by ANM signaling).
Step 607, VMSC send user terminal in IMS network just in the information of ring to UE.
Step 608, IMS equipment of the core network send the user terminal response message in IMS network to EMSC.
Step 609, EMSC send the message of called party answer to VMSC.
Step 610, EMSC send acknowledge message to IMS equipment of the core network.
Step 611, VMSC send call setup message to UE.
Step 612, UE are to VMSC feeding back confirmation message.
So far, the user terminal in CS network finishes as the flow process of the user terminal in calling IMS network.
Called flow
In this called flow, the user terminal in CS network is as terminal called, and the user terminal in IMS network is as calling terminal.
Specifically as shown in Figure 7, this communication means mainly comprises the steps:
The second user terminal with CS network that step 701, EMSC receive that first user terminal in IMS network sends carries out the request of voice communication.
In this step 701, the S-CSCF of the request of the voice communication that EMSC receives in IMS network sends.Particularly, after the position of the second user terminal in CS network in completing IMS network upgraded, correspondingly also upgrade the corresponding EMSC information of new VMSC of this second user terminal ownership of preserving in IMS network.In called flow, the EMSC information when network equipment in IMS network (as S-CSCF) can upgrade according to position after the second user terminal renewal of record, the request that this is called out to the voice communication of the second user terminal is routed to corresponding EMSC.
Step 702, EMSC are forwarded to this request the VMSC of the second user terminal ownership in the MSC group of place.
By this step 702, the request of this voice communication is forwarded to VMSC and processes, and the flow process that VMSC processes the request of voice communication is existing procedure, is not described in detail herein.
So far, the main flow process of the user terminal in the calling of the user terminal in IMS network CS network finishes.In above-mentioned flow process, the request of the voice communication that the first user terminal in the 701 IMS networks that receive sends, that the network equipment in IMS network forwards, particularly, the flow process that the network equipment in IMS network forwards the user terminal in the user terminal calling CS network in IMS network to EMSC is existing procedure, repeats no more herein.
In practical application, in above-mentioned steps 702, EMSC is forwarded in the MSC group of place and VMSC the second user terminal ownership by the request of voice communication, can be by following mode one or mode two realizations:
The mode one of Forward-reques:
EMSC determines the sign (as terminal communication number or place section) of the second user terminal, according to the sign of preserving and the corresponding relation of VMSC, this request is forwarded to VMSC corresponding with the sign of described the second user terminal in the MSC group of place.
In which one, EMSC can store the corresponding relation of user and VMSC in user's register flow path, and now EMSC can directly route the call to the VMSC at the current place of user terminal according to this corresponding relation.
The mode two of Forward-reques
Described EMSC inquires about to the HLR in CS network the VMSC that this second user terminal is corresponding, and according to the VMSC information of HLR feedback, this request is forwarded to the VMSC corresponding with VMSC information.
In which two, after EMSC receives the calling of the initiation in IMS network, can, by the roaming number to HLR inquiring user, then route the call to the VMSC at the current place of user.
In flow process described in Fig. 7, EMSC need to be responsible for accessing the signaling conversion of the user terminal of the VMSC in its place group, and therefore the user terminal in CS network is as in called voice communication flow process, and EMSC need to route the call to VMSC.
The above-mentioned user terminal of realizing in IMS network is called out the detailed signaling process of the audio call flow process of the user terminal in CS network, as shown in Figure 8, comprises the steps:
The request of the user terminal in the calling CS network that the user terminal in step 801, IMS equipment of the core network (S-CSCF) forwarding IMS network sends.
Step 802, EMSC send inquiry called routing iinformation (by SRI signaling) to HLR, inquire about the VMSC of called subscriber's ownership.
Step 803, HRL send the request (by PRN signaling) of inquiry roaming number to VMSC.
Step 804, VMSC, to HLR feedback query response (by PRN ACK signaling), feed back the VMSC information of called user terminal ownership.
Step 805, HLR are to EMSC feedback query response (by SRI ACK signaling).
If adopt the mode two of above-mentioned Forward-reques, carry out above-mentioned steps 802～step 805, if adopt the mode one of above-mentioned Forward-reques, without carrying out above-mentioned steps 802～step 805, and directly by EMSC, determine the VMSC that called subscriber belongs to.
Step 806, EMSC send setup requests (by interoffice signaling IAM) to the VMSC determining.
Step 807, VMSC send setup requests to called UE.
Step 808, UE to VMSC feedback just in the information of ring.
Step 809, VMSC send address total regression (by ANM signaling) to EMSC.
Step 810, EMSC send called subscriber just in the message of ring to IMS equipment of the core network.
Step 811, terminal called UE send setup requests to VMSC.
Step 812, VMSC send called party answer request to EMSC.
Step 813, EMSC send called party answer message to IMS equipment of the core network.
Step 814, VMSC are to UE feeding back confirmation message.
Step 815, EMSC send acknowledge message to IMS equipment of the core network.
So far, the user terminal in IMS network finishes as the flow process of the user terminal in calling CS network.
Position update flow
Position update flow is after the VMSC of the current access of user terminal in CS network changes, and needs again to IMS network, to initiate the flow process of registration.
Specifically as shown in Figure 9, this communication means mainly comprises the steps:
The position updating request that user terminal in the CS network that HLR reception VMSC in step 901, CS network forwards sends.
In this step 901, VMSC receives after the position updating request of user terminal transmission, this position updating request is transmitted to HLR and processes.
Step 902, HLR, according to the VMSC in each MSC group of preserving and the corresponding relation of EMSC, determine the EMSC corresponding with the VMSC that forwards this position updating request.
Step 903, HLR send position update notification to the EMSC determining.
In above-mentioned flow process, HLR sends after the update notification of position to the EMSC determining, and EMSC is known the registration demand that user has position to upgrade, and, to this user's of IMS network registry positional information, this flow process is consistent with existing procedure, repeats no more herein.
In practical application, in above-mentioned steps 903, HLR sends position update notification to the EMSC determining, and comprising:
HLR sends position update notification by MAP (Mobile Application Part, MAP) message to the EMSC determining.
MAP is a kind of agreement in Signaling System Number 7 system, is applied to user data query in mobile communications network, note etc.
According to above-mentioned flow process, need to do 2 upgradings to HLR:
The first, need in HLR, preserve in network in all MSC groups the corresponding relation of EMSC in VMSC and group;
The second, make HLR after receiving position updating request, notify corresponding EMSC.Should be for notifying the message of EMSC can reuse an existing MAP message MAP_CANCEL_LOCATION, this message initiatively sends to VMSC by HLR in existing network, effect is when user carries out the registration across VMSC, HLR notifies old VMSC to delete the data of relative users, has a cancellation_type field in this message.In the embodiment of the present invention, can be reused this message, when HLR receives after the position updating request of VMSC forwarding, initiatively to EMSC corresponding to the VMSC that forwards this request, send MAP_CANCEL_LOCATION message, increase the value of a cancellation_type field simultaneously, make it representative registration (being the registration process that position is upgraded).When EMSC receives after such MAP_CANCEL_LOCATION message, can act on behalf of relative users and in IMS network, carry out position registration or re-injection volume.
User terminal in the above-mentioned CS of realization network is registered to the detailed signaling process in IMS network, as shown in figure 10, comprises the steps:
User terminal in step 1001, CS network adheres to request (being CS Attach) to the VMSC transmission of its ownership for carrying out the CS territory of position renewal.
Between step 1002, VMSC and HLR, carry out that user authenticates and position update flow.
Step 1003, VMSC adhere to response (being CS Attach accept) to UE feedback CS territory.
Step 1004, HLR, according to the VMSC preserving and the corresponding relation of EMSC, derive the address of EMSC.
Step 1005, indicate this EMSC to carry out IMS registration (send position update notification to EMSC, the new position of user terminal is registered to IMS network).
Step 1006, EMSC derive the information such as user IMS home domain, user ID.
Step 1007, EMSC, according to the information deriving, carry out IMS registration to IMS equipment of the core network.
Step 1008, EMSC send acknowledge message to HLR after succeeding in registration.
So far, the flow process that the user terminal in CS network is registered in IMS network finishes.
According to above-mentioned flow process, the function that EMSC compares VMSC to be increased is that proxy user is registered and converts CS signaling to SIP signaling in IMS network, these functions are all irrelevant with user's Access Layer, therefore in the region of certain limit, only need to have a network element to be responsible for agency of trademark registration specially and signaling conversion is just enough.Based on this point, the embodiment of the present invention adopts the mode of the VMSC that partly upgrades, VMSC in network is specified to some groups, a VMSC who chooses in each group upgrades or disposes separately EMSC, acts on behalf of signaling conversion in this community intra domain user registering in IMS network, voice communication course etc.When user terminal carries out the relevant registrations such as position renewal to VMSC, need to notify the EMSC in this VMSC place group, so that acting on behalf of this user, it to IMS, initiates registration or re-injection volume.Therefore need to upgrade to the HLR of the whole network, when HLR receives after the registration message of VMSC transmission, can according to the address of VMSC, obtain the address of the EMSC in this VMSC place group, then notify this EMSC user's registration.EMSC receives after the notice of HLR, by user code number, derive user IMS home domain, IMPI (IMS Private Identity, the privately owned sign of IMS), IMPU (IMS Public Identity, IMS public identify) etc. information, then acts on behalf of this user and registers or re-injection volume at IMS.Particularly, in above-mentioned steps step 1006, EMSC derives user IMS home domain, can have following two kinds of modes:
The corresponding relation of mode one, EMSC local storage user number section and corresponding IMS home domain;
Mode two, EMSC obtain the corresponding relation of code number and home domain by inquiry ENUM (Telephone Number Mapping, telephone number mapping) server.
Embodiment bis-
The embodiment of the present invention two provides a kind of communicator, and the calling procedure that this communicator provides with above-described embodiment one is corresponding one by one.Particularly, the communicator that the embodiment of the present invention two provides, as shown in figure 11, comprising:
Request reception unit 1101 and request retransmission unit 1102;
Wherein:
Request reception unit 1101, the user terminal with IP Multimedia System IMS network sending for the user terminal of receiving circuit exchange CS network carries out the request of voice communication;
Request retransmission unit 1102, for being forwarded to the request of the voice communication of request reception unit 1101 receptions the EMSC of mobile switching centre of the enhancing of place MSC group.
In the preferred implementation that the embodiment of the present invention two provides, the request retransmission unit 1102 that Figure 11 shown device comprises, specifically for:
Information according to the EMSC in the place MSC group of preserving, is forwarded to the EMSC in the MSC group of place by the request of this voice communication.
The VMSC that above-mentioned communicator can comprise for ICS system.
Should be appreciated that the only logical partitioning for carrying out according to the function of this device realization of unit that above communicator comprises, in practical application, can carry out stack or the fractionation of said units.And the calling procedure that the function that the communicator that this embodiment provides is realized provides with above-described embodiment one is corresponding one by one, the more detailed handling process realizing for this device, in said method embodiment mono-, be described in detail, be not described in detail herein.
The embodiment of the present invention two also provides a kind of communicator, and the called flow that this communicator provides with above-described embodiment one is corresponding one by one, and particularly, the communicator that the embodiment of the present invention two provides, as shown in figure 12, comprising:
Request reception unit 1201 and request retransmission unit 1202;
Wherein:
Request reception unit 1201, carries out the request of voice communication for the second user terminal with circuit switching (CS) network that receives that the first user terminal of IP Multimedia System IMS network sends;
Request retransmission unit 1202, is forwarded to place Visited Mobile Switching Center MSC group and VMSC described the second user terminal ownership for the request of voice communication that request reception unit 1201 is received.
In the preferred implementation that the embodiment of the present invention two provides, the request retransmission unit 1202 that Figure 12 shown device comprises, specifically for:
Determine the terminal iidentification of described the second user terminal, according to the terminal iidentification of preserving and the corresponding relation of VMSC, the request of this voice communication is forwarded to VMSC corresponding with the terminal iidentification of described the second user terminal in the MSC group of place;
Or
Attaching position register HLR in CS network inquires about the VMSC of this second user terminal ownership, and according to the VMSC information of described HLR feedback, the request of this voice communication is forwarded to the VMSC corresponding with described VMSC information.
The EMSC that above-mentioned communicator can comprise for ICS system.
Should be appreciated that the only logical partitioning for carrying out according to the function of this device realization of unit that above communicator comprises, in practical application, can carry out stack or the fractionation of said units.And the called flow that the function that the communicator that this embodiment provides is realized provides with above-described embodiment one is corresponding one by one, the more detailed handling process realizing for this device, in said method embodiment mono-, be described in detail, be not described in detail herein.
The embodiment of the present invention two also provides a kind of communicator, and the position update flow that this communicator provides with above-described embodiment one is corresponding one by one, and particularly, the communicator that the embodiment of the present invention two provides, as shown in figure 13, comprising:
Request reception unit 1301 and request retransmission unit 1302;
Wherein:
Request reception unit 1301, the position updating request sending for receiving the user terminal of the CS network that described request receiving element that Visited Mobile Switching Center VMSC forwards receives;
Request retransmission unit 1302, be used for according to the VMSC of each MSC group preserving and the corresponding relation of the EMSC of mobile switching centre of enhancing, determine the EMSC corresponding with the VMSC that forwards described position updating request, and send position update notification to the described EMSC determining.
In the preferred implementation that the embodiment of the present invention two provides, the request retransmission unit 1302 that Figure 13 shown device comprises, specifically for:
By MAP message, to the described EMSC determining, send position update notification.
Above-mentioned communicator is the HLR that ICS system comprises.
Should be appreciated that the only logical partitioning for carrying out according to the function of this device realization of unit that above communicator comprises, in practical application, can carry out stack or the fractionation of said units.And the position update flow that the function that the communicator that this embodiment provides is realized provides with above-described embodiment one is corresponding one by one, the more detailed handling process realizing for this device, in said method embodiment mono-, be described in detail, be not described in detail herein.
The problem low for the upgrading efficiency existing in prior art and consumes resources is many, on the ICS scheme basis that the embodiment of the present invention proposes at 3GPP, be optimized, a small amount of VMSC upgraded with the whole network HLR or dispose separately a small amount of EMSC and act on behalf of the whole network VMSC and realize and the communicating by letter of IMS network, and the VMSC being acted on behalf of being carried out to data configuration and realize ICS.Because the quantity of HLR in existing network is far smaller than VMSC, the input of simultaneously equipment being carried out to data configuration is less than the equipment required input of upgrading, and the technical scheme therefore providing by the embodiment of the present invention can greatly reduce as realizing the needed investment of ICS and man-hour.In addition, because existing network HLR has good back mechanism, so the present invention can reduce the risk that the network rebuilding brings to a certain extent.
The ICS system that the technique scheme that provides by the embodiment of the present invention realizes, comprises MSC group is set, this MSC group comprises at least one VMSC and an EMSC, and VMSC realizes and the communicating by letter of IMS network for the EMSC comprising by place MSC group.Adopt this technical scheme, the MSC group that comprises at least one VMSC and an EMSC by setting, EMSC that VMSC can comprise by place MSC group is realized and the communicating by letter of IMS network, with respect to prior art, without each VMSC that CS network is comprised, upgrade to EMSC, thereby guaranteeing on the basis of proper communication, reduced the quantity of upgrading VMSC, improve the efficiency that realizes ICS system, saved system resource.
Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.
Claims (20)
1. an IMS centralized traffic control system, is characterized in that, comprising:
MSC group is set, and this MSC group comprises the EMSC of mobile switching centre of at least one VMSC and an enhancing;
Described VMSC carries out the request of voice communication for the user terminal with IMS network that receives that the user terminal of CS network sends, and according to the information of the EMSC in the place MSC group of preserving, the request that forwards described voice communication is to the EMSC in the MSC group of place.
2. the system as claimed in claim 1, is characterized in that, the EMSC that described MSC group comprises is obtained or disposed separately by VMSC upgrading.
3. the system as claimed in claim 1, is characterized in that, the VMSC that described MSC group comprises is positioned at same position region; Or
Total load amount corresponding to VMSC that described MSC group comprises is lower than setting threshold.
4. the system as claimed in claim 1, is characterized in that, also comprises:
Attaching position register HLR, for receiving the position updating request of the user terminal of the CS network that VMSC forwards, and the corresponding relation of the EMSC comprising according to the described VMSC preserving and its place MSC group, to the EMSC transmission position update notification corresponding with described VMSC.
5. the system as claimed in claim 1, it is characterized in that, described EMSC, carries out the request of voice communication for what receive that the user terminal of IMS network sends with the user terminal of CS network, the request of described voice communication is forwarded to the VMSC of the user terminal ownership in described CS network.
6. the communication means based on IMS centralized traffic control system claimed in claim 1, is characterized in that, comprising:
The user terminal with IP Multimedia System IMS network that user terminal in Visited Mobile Switching Center VMSC receiving circuit exchange CS network sends carries out the request of voice communication;
Described VMSC is forwarded to the request of described voice communication the EMSC of mobile switching centre of the enhancing in the MSC group of place.
7. method as claimed in claim 6, is characterized in that, described VMSC is forwarded to the EMSC in the MSC group of place by the request of described voice communication, comprising:
Described VMSC, according to the information of the EMSC in the place MSC group of preserving, is forwarded to the EMSC in the MSC group of place by the request of described voice communication.
8. the communication means based on IMS centralized traffic control system claimed in claim 1, is characterized in that, comprising:
The second user terminal with circuit switching (CS) network that the EMSC of mobile switching centre strengthening receives that first user terminal in IP Multimedia System IMS network sends carries out the request of voice communication;
Described EMSC is forwarded to the request of described voice communication the VMSC of the second user terminal ownership described in the Visited Mobile Switching Center MSC group of place.
9. method as claimed in claim 8, is characterized in that, described EMSC is forwarded to the request of described voice communication the VMSC of the second user terminal ownership described in the MSC group of place, comprising:
Described EMSC determines the terminal iidentification of described the second user terminal, according to the terminal iidentification of preserving and the corresponding relation of VMSC, the request of described voice communication is forwarded to VMSC corresponding with the terminal iidentification of described the second user terminal in the MSC group of place; Or
Described EMSC inquires about the VMSC of described the second user terminal ownership to the attaching position register HLR in CS network, and according to the VMSC information of described HLR feedback, the request of described voice communication is forwarded to the VMSC corresponding with described VMSC information.
10. the communication means based on IMS centralized traffic control system claimed in claim 1, is characterized in that, comprising:
The position updating request that user terminal in the described CS network that attaching position register HLR reception Visited Mobile Switching Center VMSC in circuit switching (CS) network forwards sends;
Described HLR, according to the corresponding relation of the EMSC of mobile switching centre of the VMSC in each MSC group of preserving and enhancing, determines the EMSC corresponding with the VMSC that forwards described position updating request, and sends position update notification to the described EMSC determining.
11. methods as claimed in claim 10, is characterized in that, HLR sends position update notification to the described EMSC determining, and comprising:
HLR sends position update notification by MAP MAP signaling to the described EMSC determining.
12. 1 kinds of communicators based on IMS centralized traffic control system claimed in claim 1, is characterized in that, comprising:
Request reception unit, the user terminal with IP Multimedia System IMS network sending for the user terminal of receiving circuit exchange CS network carries out the request of voice communication;
Request retransmission unit, for being forwarded to the request of the voice communication of described request receiving element reception the EMSC of mobile switching centre of the enhancing of place MSC group.
13. devices as claimed in claim 12, is characterized in that, described request retransmission unit, specifically for:
Information according to the EMSC in the place MSC group of preserving, is forwarded to the EMSC in the MSC group of place by the request of described voice communication.
14. devices as described in claim 12 or 13, is characterized in that, described communicator is Visited Mobile Switching Center VMSC.
15. 1 kinds of communicators based on IMS centralized traffic control system claimed in claim 1, is characterized in that, comprising:
Request reception unit, carries out the request of voice communication for the second user terminal with circuit switching (CS) network that receives that the first user terminal of IP Multimedia System IMS network sends;
Request retransmission unit, for being forwarded to the request of the voice communication of described request receiving element reception the VMSC of the second user terminal ownership described in the Visited Mobile Switching Center MSC group of place.
16. devices as claimed in claim 15, is characterized in that, described request retransmission unit, specifically for:
Determine the terminal iidentification of described the second user terminal, according to the terminal iidentification of preserving and the corresponding relation of VMSC, the request of described voice communication is forwarded to VMSC corresponding with the terminal iidentification of described the second user terminal in the MSC group of place; Or
Attaching position register HLR in CS network inquires about the VMSC of described the second user terminal ownership, and according to the VMSC information of described HLR feedback, the request of described voice communication is forwarded to the VMSC corresponding with described VMSC information.
17. devices as described in claim 15 or 16, is characterized in that, the mobile switching centre EMSC of described communicator for strengthening.
18. 1 kinds of communicators based on IMS centralized traffic control system claimed in claim 1, is characterized in that, comprising:
Request reception unit, the position updating request sending for receiving the user terminal of the circuit switching (CS) network of Visited Mobile Switching Center VMSC forwarding;
Request retransmission unit, be used for according to the VMSC of each MSC group preserving and the corresponding relation of the EMSC of mobile switching centre of enhancing, determine the EMSC corresponding with the VMSC that forwards described position updating request, and send position update notification to the described EMSC determining.
19. devices as claimed in claim 18, is characterized in that, described request retransmission unit, specifically for:
By MAP MAP signaling, to the described EMSC determining, send position update notification.
20. devices as described in claim 18 or 19, is characterized in that, described communicator is attaching position register HLR.
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