CN100454904C

CN100454904C - IP direct connection networking method, device and system under soft switch architecture

Info

Publication number: CN100454904C
Application number: CNB2006100631396A
Authority: CN
Inventors: 朱国军
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2006-10-16
Filing date: 2006-10-16
Publication date: 2009-01-21
Anticipated expiration: 2026-10-16
Also published as: CN1968188A

Abstract

The invention relates to a method for realizing direct IP connection of mobile communication network, wherein the invention comprises that: first defining IP domain parameter; when needs to build IP support to one network unit, MSCe or MSC SERVER based on IP domain parameter instructs MGW to build IP support on appointed IP address. The invention also discloses a BSC switch method, which comprises that: MSCe receives switch request of BSC, to send support build instruction with relative IP domain parameter to MGW; MGW builds IP support based on said OP domain parameter; MSCe sends switch request to the target BSC, the target BSC switches. The invention also provides a relative mobile communication system. The invention method has simple method, to avoid depending router when building large-scale full-IP mobile communication network, to reduce cost.

Description

IP direct connection networking method, equipment and system thereof under the soft-exchange construction

Technical field

The present invention relates to the networking technology of soft-exchange construction, IP bearer network network-building method and system thereof under particularly a kind of soft-exchange construction.

Background technology

Next generation network is to integrate professional brand-new network such as speech, data and multimedia.It goes out the open architectural framework of layering based on Softswitch technology and IP technique construction.Operator can utilize this open architectural framework to realize the Networking Solutions ﹠ provisioned of oneself flexibly under the driving of business, and improves the competitiveness of enterprise by the continuous fusion of professional and network.

In the 3G (Third Generation) Moblie network, Softswitch technology and IP technology are used widely.In the network system that the utilization Softswitch technology makes up, by calling out separating of control and media bearer, realized open layer architecture, the network element of each level can pass through the standard agreement intercommunication, and can independent evolution do not influence whole network system when adapting to the development of WeiLai Technology.Soft switch mainly comprises media gateway and calls out two levels of control.The media gateway layer provides and inserts adaption function, with the media stream transition function of other network interworkings and provide other function such as particular media asset; Call control layer provides the transmission adaption function of signaling on IP network and realization call establishment, keeps and discharges other functions such as control.Carrying separates with control makes that the network function division is more clear, and network design is easier; And the introducing of IP networking makes operator can reduce cost of investment.By being carried on the IP grouped data, voice, data and other multimedia messages wrap, making raw tone, data and other multimedia messages can be used as a common IP packet transmits on the net in Data-carrying, also reduced the network bandwidth that takies when reducing the number of times of encoding and decoding, this lays a good foundation for the communication service that better quality is provided.

Softswitch technology has obtained sufficient application in the WCDMA system of the R4 of 3GPP definition and R5, R6 description later on thereof.Description according to R4, mobile switching centre (MSC) is broken down into MSC server (MSCServer) and media gateway (MGW), similarly, in the cdma2000 standard that 3GPP2 formulates, MSC in the traditional circuit domain develops into MSCe and media gateway MGW, MSC SERVER or MSCe provide the CCF of traditional MSC, and MGW then provides the exchange of media function of traditional MSC.In order to solve the transmission of IP packet on the IP bearer network, be by disposing the IP data backbone network that a large amount of routers are set up in existing technical scheme, all BSC and the voice on the MGW, data and other multimedia messages are all finished exchange and intercommunication by this IP data backbone network, for MGW or BSC, only IP need be carried data and deliver to router and get final product, finish exchanges data and transmission according to the IP address by router.

Accompanying drawing 1 is to be that example is introduced IP bearer network networking plan with CDMA.As shown in the figure, because the framework that soft switch has adopted carrying to separate with control, when MSCe needs to set up information transfer channel in procedure for processing call, set up the IP carrying by commands for controlling MGW, MGW selects to set up on the IP interface carrying arbitrarily according to described instruction, the voice, data or the out of Memory that need then to transmit send to router by this IP interface, are finished the exchange of above-mentioned information by router.In current networking plan, MGW needs to be connected to the IP interface of all user's carryings on the router, so that the carrying of selecting an IP address to be set up arbitrarily when receiving instruction can be delivered to router, router is finished transmission according to purpose IP address.MGW can only be selecting to set up carrying on the IP address arbitrarily, so must participate in finishing route and exchanges data by router in the prior art scheme.Because MSCe can not control MGW and set up carrying on the IP address of appointment, so expensive router becomes imperative equipment when setting up totally interconnected IP backbone, this has not only improved the networking cost; Also can increase the complexity of networking simultaneously, when in the network during a certain network element failure, because the contiguous above-mentioned fault of network element perception is in time also initiated networking and is switched, the result can cause the fault detect difficulty to strengthen, this has caused the time delay of voice IP bag inevitably, problems such as shake and packet loss, thus make transmission quality be difficult to guarantee; A large amount of routers that use also can reduce flexibility and the reliability of setting up cordless communication network significantly when setting up catenet.

Summary of the invention

In view of this, the invention provides method, equipment and the system thereof of the direct connection networking under a kind of soft-exchange construction, can be when carrying out the networking of soft switch framework, no longer rely on router and set up soft exchanging communication network at an all-IP.

The invention provides a kind of method that realizes that mobile communications network IP is direct-connected, comprise step: signaling flow definition IP field parameter between the definition network element, wherein said IP field parameter indication MGW notifies available IP address; When needs were established to the IP carrying of certain network element, MSCe or MSC SERVER set up the IP carrying according to corresponding IP field parameter indication MGW on the IP address of appointment.Wherein, the IP field parameter comprises one or more IP address, and described MGW is established to the IP carrying of respective network elements by described IP address.Wherein, when comprising two above MGW under same MSCe or the MSC SERVER, described two above MGW are divided into same IP territory or are divided into different IP territories.Wherein, MSCe or MSC SERVER issue the IP field parameter to MGW, and control MGW sets up the IP carrying on the IP address of appointment.Wherein, each network element is set up the IP carrying by the defined IP of IP field parameter address on MGW.

The present invention also provides a kind of method of station to station call, comprises step: MSCe or MSC SERVER receive after Client-initiated is called out and inquire about corresponding IP field parameter, and send the Indication message of the foundation carrying that comprises this IP field parameter to local terminal MGW; Local terminal MGW is set up to the carrying of opposite end MGW according to described IP field parameter, and returns carrying to described MSCe or MSC SERVER and set up and finish message; MSCe or MSC SERVER send INVITE to opposite end end office (EO) in the carrying that MGW sets up.After said method comprised that further step: MSCe or MSC SERVER receive the INVITE of opposite end end office (EO), the IP field parameter that inquiry is corresponding sent the foundation carrying Indication message that comprises the IP field parameter to local terminal MGW; Described MGW sets up carrying according to the above-mentioned IP domain parameter, and returns carrying to described MSCe or MSC SERVER and set up and finish message.Said method also can further comprise step: MSCe or the MSC SERVER inquiry IP field parameter corresponding with local terminal BSC, and issues the foundation carrying Indication message that comprises described IP field parameter to local terminal MGW; Described MGW sets up carrying according to described IP field parameter, and returns carrying to MSCe or MSC SERVER and set up and finish message.

The present invention also discloses a kind of changing method in addition, comprise step: after MSCe receives the handoff request of BSC, query aim BSC IP field parameter, wherein said IP field parameter indication MGW notifies available IP address, and sends the foundation carrying Indication message that comprises the above-mentioned IP domain parameter to MGW; MGW is setting up IP carrying according to the above-mentioned IP domain parameter, and returns to MSCe and set up bearing response message; After MSCe receives above-mentioned response message, initiate handoff request to target BS C, described target BS C switches.

Based on identical invention thought, the invention discloses a kind of mobile communication network, comprise on two above MSCe or the MSC SERVER, two above MGW and two above BSC or RNC, described MSCe or MSCSERVER comprise command unit, be used for the IP field parameter is issued to local terminal MGW, and indicating described MGW to set up carrying according to the IP field parameter, wherein said IP field parameter indication MGW notifies available IP address.Described MGW comprises that carrying sets up the unit, is used to receive and is established on the IP address of appointment according to described IP field parameter the IP carrying of opposite end MGW or opposite end BSC.

The present invention also provides a kind of mobile switch equipment in addition, is used to handle the calling of mobile communication subscriber, comprises that parameter issues the unit, is used for issuing the IP field parameter to MGW, and wherein said IP field parameter indication MGW notifies available IP address.Wherein, above-mentioned mobile switch equipment further comprises command unit, is used to indicate MGW to set up the IP carrying according to the IP address of IP field parameter definition.

The present invention provides a kind of media gateway device simultaneously, is used for process information carrying, comprises the IP resolution unit, is used to the IP address that receives the IP field parameter and resolve its record, and wherein said IP field parameter indication MGW notifies available IP address.This media gateway device further comprises carrying sets up the unit, is used for putting down in writing the IP address of being put down in writing by the IP field parameter, is established to the IP carrying of corresponding network element.

In sum, technical scheme provided by the invention has realized realizing between each network element of mobile communication system that by the IP field parameter IP is direct-connected, makes that being no longer dependent on router realizes networking, has reduced the networking cost effectively; In time, also simplified networking structure and improved the extensibility of communication system, owing to there are not other datacom devices to participate in, and can the fast detecting fault, guarantee network quality, reduced the time-delay of the voice IP bag that the factor open network causes simultaneously, shake, problems such as packet loss guarantee voice call quality; At last, along with the simplification of network architecture, the difficulty of network management and maintenance and workload also can correspondingly reduce, and this lays the first stone for operator provides better service.

Description of drawings

Fig. 1 is the networking diagram of IP bearer network in the prior art;

Fig. 2 is IP direct connection networking figure provided by the invention;

Fig. 3 is the station to station call flow chart under the networking mode provided by the present invention;

Fig. 4 is a switching flow between intra-office BSC under the networking mode provided by the present invention.

Embodiment

Invention thought of the present invention is to introduce IP territory and IP field parameter, divides IP territory and definition IP field parameter according to the different attribute of network element, and wherein the IP field parameter has been put down in writing and comprised that setting up IP carries required other contents such as IP address; The IP territory can be the parameter that and UMG consult definition, also can be reduced to one or several concrete IP address.MGW can be established to the carrying of another network element by the IP address that the IP field parameter is put down in writing, realize directly with another network element between communicate by letter, no longer rely on router and carry out exchanges data.Introduce the defined IP of preferred embodiment territory indication bag provided by the invention (IP DomainIndication Package) below, above-mentioned IP domain indication package definition comprise attributes such as PackageID, Properties, Events, Signals, Procedures, be used to describe the indicated IP field parameter between media gateway MGW and MSC Server or the MSCe of knowing clearly.Following the IP field parameter may be different in the different technical schemes as being shown the IP field parameter that comprises among this embodiment, but principle is close.

IP territory indication package definition: (IP Domain Indication Package)

Package?ID：IDIP(0xA7)

Version：1

Extends：None

Properties

Description: indication IP address

Type：Integer

Possible?Values：

Concrete IP field parameter, 0-65535

Procedures：

1, MSC Server issues the IP field parameter to MGW when setting up carrying, and MGW presses the IP available address of the definition of IP territory indication;

2, MGW sets up carrying on the IP address of appointment, finishes the transmission of subsequent voice calls carrying data.

Be example and the effect in setting up IP network that the IP territory is described in conjunction with the accompanying drawings below with CDMA, accompanying drawing 2 is the networking diagram of the direct-connected mode of IP provided by the invention, when MSCe need be established to the IP carrying of certain office direction (as certain MSCe of opposite end or certain BSC of opposite end), obtain and analyze pre-configured to opposite end office to the IP field parameter and indicate MGW, MGW sets up carrying according to the value of above-mentioned IP domain parameter-definition on the IP address of appointment.The above-mentioned IP address can be directly connected to corresponding office direction according to being configured in advance and planning.The IP territory can be configured when planning MSCe and MGW networking, and above-mentioned configuration information can be kept in the system database.Wherein the definition in IP territory is relevant with office direction, and also related with the MGW group, the office direction that each IP connects can be distributed one or more IP territory; When having IP to connect between a plurality of MGW that belong to a MSCe, also these can be had the MGW set of dispense of the direct-connected relation of IP is an IP territory, also each MGW can be distributed an IP territory.On MGW, corresponding one or more IP address, an IP territory, these IP addresses directly are connected with the opposite end BSC or the opposite end MGW of MSCe configuration.The IP field parameter that MGW issues according to MSCe is set up carrying on the defined IP of this IP field parameter address, so just set up the IP direct channel between the MGW.The direct-connected physical medium of IP described herein can be FE, E1/T1/E3/T3, and GE, all can be used for carrying the transmission medium of IP packet POS etc.

IP territory 1 has as shown in Figure 2 defined the interface channel to BSC1 at MGW1, if MSCe1 determines a calling and need be established to the information-bearer channel of BSC1, only need notice MGW1 on IP territory 1, to set up carrying, MGW1 is according to indication, after setting up carrying on the IP territory 1, just can guarantee that the opposite end is exactly the specified BSC1 of MSCe1.Similarly, the IP field parameter in the IP territory 2 shown in the figure has defined the interface channel between the MGW3 under the MSCe2 of MGW1 under the MSCe1; The IP field parameter in IP territory 3 has defined at MGW1 under the same MSCe1 and the interface channel between the MGW2; The IP field parameter in IP territory 4 has defined MGW2 to the interface channel between the BSC2; The IP field parameter in IP territory 5 has defined under the MSCe2 MGW3 to the interface channel between MSCe1 or the MGW1; The IP field parameter in IP territory 6 has defined MGW3 to the interface channel between the BSC3.In sum, the definition rule of IP field parameter is predefined, can change according to different application scenarioss, and described above only is a kind of execution mode provided by the invention.Another embodiment application provided by the invention is WCDMA.In the technical scheme of this embodiment, MSC SERVER issues the IP field parameter to MGW, and control MGW is established to the carrying of specifying other network elements such as RNC; Wherein the definition of IP field parameter is similar to the defined IP field parameter of embodiment of CDMA.Similarly, the present invention also is provided in other moving communicating field the technical scheme based on invention thought of the present invention.

Now further specify based on the station to station call flow process under the direct connection networking mode of the present invention with the foregoing description: adopt the IP carrying between BSC and the MSCe, adopt Session Initiation Protocol communication between two MSCe, the user makes a call.Be illustrated in figure 3 as two station to station call flow processs between the MSCe, for convenience of description, the network element of calling terminal all adds " O " in the accompanying drawing after title, and the called end network element is then represented by adding " T ".May further comprise the steps:

1, the user makes a call under BSC-O;

2, MSCe-O judges according to content in pre-configured data message and the message whether this BSC is for being whether to be the direct-connected mode of IP between IP BSC and above-mentioned BSC and the MGW, if then inquiry obtains the pairing IP field parameter of this BSC (IP territory 1), and when sending foundation carrying Indication message to MGW, send described IP field parameter;

3, MGW-O receives after this foundation carrying Indication message, read and analyze the above-mentioned IP field parameter, obtain this IP field parameter corresponding and the direct-connected IP of BSC address on MGW, on this IP address, set up carrying then, and return to MSCe-O and to set up carrying and finish message;

4, MSCe-O confirms that this calling for behind the outbound call, gets access to the IP field parameter (IP territory 2) of corresponding office direction, and is with this IP field parameter in the foundation carrying Indication message that sends to MGW;

5, MGW receives after this foundation carrying Indication message, then inquires about on MGW and the direct-connected IP of called end address according to described IP field parameter, sets up carrying then on this IP address, and returns the foundation carrying to MSCe-O and finish message;

6, MSCe-O sends INVITE to called end, and request is set up and called out;

7, MSCe-T receives after the INVITE, inquires the IP field parameter (IP territory 5) of corresponding office direction, and sends the foundation carrying Indication message that comprises described IP field parameter to MGW;

8, MGW receives after the above-mentioned foundation carrying Indication message, according to described IP field parameter the MGW inquiry with play a game direct-connected IP address, on this IP address, set up carrying then, and return to MSCe-T and to set up carrying and finish message;

9, MSCe-T inquires about the IP field parameter (IP territory 6) corresponding with BSC-T, and carries Indication message to the foundation that comprises the above-mentioned IP domain parameter that MGW sends;

10, MGW receives after this foundation carrying Indication message, sets up the IP carrying according to the above-mentioned IP domain parameter between MGW and BSC, and returns the foundation carrying to MSCe-T and finish message.

More than set up to call out for having introduced method how to use IP field parameter provided by the invention with CDMA, for other mobile communication system such as WCDMA, TD-SCDMA, use technical scheme provided by the invention also can realize the IP carrying, such as the MSCe in the corresponding the foregoing description of the MSC SERVER in the WCDMA field, the BSC of the corresponding the foregoing description of RNC.

For switching flow, also can be implemented between the BSC and set up carrying by direct-connected mode by the IP field parameter, be illustrated in figure 4 as switching flow:

1, MSCe receives the handoff request message of BSC-O, inquiry and the pairing IP field parameter of target BS C (BSC-T), and in the foundation carrying Indication message that sends to MGW, be with this IP field parameter;

2, MGW receives after this foundation carrying Indication message, sets up the IP carrying according to the above-mentioned IP domain parameter on MGW, and returns to MSCe and to set up bearing response message.

3, after MSCe receives and sets up bearing response message, initiate handoff request to BSC-T; Described BSC-T returns handoff response.

Accordingly, in order to realize inventive concept, MSCe or MSC SERVER, MGW all need to carry out function and expand, so that MSCe or MSC SERVER possess the function that issues the IP field parameter and set up carrying according to control MGW according to the IP field parameter to MGW; MGW can resolve the IP field parameter and be established to the carrying of appointment network element according to analysis result.Based on above-mentioned thought, the present invention has expanded parameter at the mobile switch equipment (as MSCe or MSC SERVER) of the calling that is used for handling mobile communication subscriber in a preferred embodiment and has issued the unit, is used for issuing the IP field parameter to MGW.Also can further comprise command unit in addition, be used to indicate MGW to set up the IP carrying according to the IP address of IP field parameter definition.Same, in another preferred embodiment of the present invention, expanded the IP resolution unit being used for process information carrying media gateway device, be used to the IP address that receives the IP field parameter and resolve its record.This media gateway device also can further comprise carrying sets up the unit, is used for putting down in writing the IP address of being put down in writing by the IP field parameter, is established to the IP carrying of corresponding network element.

More than a kind of IP of utilization field parameter provided by the present invention is set up IP carrying method and system thereof be described in detail, and in conjunction with specific embodiments principle of the present invention and execution mode are set forth, method of the present invention and core concept thereof are understood in the help that only is used for of above embodiment; One of ordinary skill in the art is according to thought of the present invention, in specific embodiments and applications or will change to some extent.These changes should be understood to implement the present invention.

Claims

1, a kind of method that realizes that mobile communications network IP is direct-connected, it is characterized in that, comprise step: when needs were established to certain network element carrying, MSCe or MSC SERVER were issued to MGW with the IP field parameter, and wherein said IP field parameter indication MGW notifies available IP address; MSCe or MSC SERVER also control MGW and set up the IP carrying on the IP addresses of appointment.

2, method according to claim 1 is characterized in that, according to the pre-defined IP field parameter of signaling flow between network element.

3, method according to claim 1 and 2 is characterized in that, the IP field parameter comprises one or more IP address.

4, method according to claim 1, it is characterized in that, when comprising two above MGW under same MSCe or the MSC SERVER, described two above MGW are divided into same IP territory and use an IP field parameter, perhaps described two above MGW are divided into different IP territories, use different IP field parameters.

5, a kind of method of station to station call is characterized in that, comprises step:

After A, MSCe or MSC SERVER receive that Client-initiated is called out, inquire about the IP field parameter of corresponding office direction, and sending the Indication message of the foundation carrying comprise this IP field parameter to calling terminal MGW, wherein said IP field parameter is used to notify MGW to specify available IP address;

B, calling terminal MGW are set up to the carrying of called end MGW according to described IP field parameter;

After C, calling terminal MGW and called end MGW set up carrying, MSCe or MSC SERVER sent message to called end end office (EO) in described carrying.

6, method according to claim 5 is characterized in that, further comprises step after the step C:

After called end MSCe or MSC SERVER receive the message of calling terminal transmission, the IP field parameter of inquiry called end wireless access network correspondence, and to called end MGW transmission foundation carrying Indication message, described foundation carrying Indication message comprises described called end wireless access network IP field parameter;

Described called end MGW sets up the carrying between called end MGW and the called end wireless access network according to the IP field parameter of described called end Access Network correspondence.

7, method according to claim 5 is characterized in that, comprises step before the steps A:

After MSCe or MSC SERVER receive the customer call of calling terminal wireless access network forwarding, the IP field parameter that MSCe or MSCSERVER inquiry is corresponding with the calling terminal wireless access network, and issue the foundation that comprises the described IP field parameter corresponding with the calling terminal wireless access network to calling terminal MGW and carry Indication message;

Described calling terminal MGW sets up the carrying between MGW and the wireless access network according to the described IP field parameter corresponding with the calling terminal wireless access network.

8, a kind of method of BSC switching is characterized in that, comprises step:

After MSCe receives the handoff request of BSC, query aim BSC IP field parameter, and send the foundation carrying Indication message comprise the above-mentioned IP domain parameter to MGW, wherein said IP field parameter is used to notify MGW to specify available IP address;

MGW sets up carrying according to the above-mentioned IP domain parameter;

After carrying was set up, MSCe initiated handoff request to target BS C, and described target BS C switches.

9, method according to claim 8 is characterized in that, described IP field parameter has defined the direct-connected parameter of IP between MGW and the target BS C.

10, a kind of mobile communication network, comprise on two above MSCe or the MSC SERVER, two above MGW and two above BSC or RNC, it is characterized in that, described MSCe or MSC SERVER are issued to local terminal MGW with the IP field parameter, and indicate described local terminal MGW to set up carrying according to the IP field parameter, wherein said IP field parameter is used to notify MGW to specify available IP address;

Described MGW receives described IP field parameter, and is established to the IP carrying of opposite end MGW or opposite end BSC on the IP address of appointment according to this IP field parameter.

11, a kind of mobile switch equipment, being used to manage business exchanges and controls Signalling exchange and be used for media gateway controlling, it is characterized in that, comprises that parameter issues the unit, be used for issuing the IP field parameter to MGW, wherein said IP field parameter is used to notify MGW to specify available IP address.

12, equipment according to claim 11 is characterized in that, further comprises command unit, is used to indicate MGW to set up the IP carrying according to the IP address of IP field parameter definition.

13, equipment according to claim 11 is characterized in that, further comprises query unit, is used to inquire about to related network elements carrying set up needed IP field parameter.

14, a kind of media gateway device, be used for the exchange of voice and Media Stream, and provide various resources also to be used for the process information carrying, it is characterized in that, comprise the parameter resolution unit, be used to the IP address that receives the IP field parameter and resolve its record, wherein said IP field parameter is used to notify MGW to specify available IP address.

15, equipment according to claim 14 is characterized in that, further comprises carrying setting up the unit, is used for putting down in writing the IP address of being put down in writing by the IP field parameter, is established to the IP carrying of corresponding network element.