CN1232136C - An end-to-end routing method of voice core network in wireless internet protocol - Google Patents
An end-to-end routing method of voice core network in wireless internet protocol Download PDFInfo
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- CN1232136C CN1232136C CN 02146484 CN02146484A CN1232136C CN 1232136 C CN1232136 C CN 1232136C CN 02146484 CN02146484 CN 02146484 CN 02146484 A CN02146484 A CN 02146484A CN 1232136 C CN1232136 C CN 1232136C
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Abstract
The present invention discloses an end-to-end routing method of a speech core network in a wireless internet protocol (IP). The method comprises the steps that A, a calling user terminal originates a call establishment request to a calling mobile switching center server (MSC Server); the calling MSC Server obtains routing information comprising the roaming number of a called mobile user terminal (UE) from a called MSC Server by applying parts of signaling; B, the calling MSC Server originates an address translation request message comprising the roaming number of the called UE to a gatekeeper (GK); C, the GK judges whether to receive processing or not, if true, the GK returns a confirmation response message with the IP address of the called MSC Server to the calling MSC Server, and then step D is carried out, else the GK sends a call reject message, and the call of the calling MSC Server is terminated; D, the calling MSC Server originates a call establishment request to the called UE through the called MSC Server. The present invention makes a wireless network converted into a plane structure from the traditional layered structure by the end-to-end routing technology, not only simplifies the structure of the network but also saves networking cost.
Description
Technical field
The present invention relates to route technology end to end, particularly based on a kind of wireless internet protocol (IP) voice core net end-to-end routing method of agreement H.323.
Background technology
Broadband CDMA system (WCDMA) core net main parallel circuit territory (CS) and packet domain (PS), the CS territory provides voice, fax and circuit type data service, and the PS territory provides Packet data service.
Press the developing stage of WCDMA agreement, WCDMA is divided into R99, R4 and R5 three phases.From present WCDMA standard, R4 and CS bearer independent territory (BICSCN, Bearer IndependentCircuit Switching Core Network) support voice packet bearer are the final forms of network in wireless core network CS territory.The R4 network mainly is made up of Mobile Switching Center Server (MSC Server), mobile switching centre's gateway server (GMSC Server), media gateway (MGW), attaching position register entities such as (HLR).Wherein, adopt between MSC Server with the calling of bearer independent and control (BICC, BearerIndependent Call Control), can support time division multiplexing (TDM)/many kinds of carryings of ATM(Asynchronous Transfer Mode)/IP between MGW.The protocol stack of its carrying is respectively BICC/ the the 3rd, the 2nd, the 1st class message transmission protocol (MTP3/MTP2/MTP1), BICC/MTP3B/SAAL/ the 5th class ATM Adaptation Layer (AAL5)/ATM/ layer 1 (L1), BICC/ Stream Control Transmission Protocol (SCTP)/agreements such as IP/L2/L1, and these carryings all are connection-oriented.
In the wireless core network CS territory of adopting BICC as call control signalling, when the BICC signaling bear is on SCTP/IP, because SCTP is a Connection-oriented Protocol, physical medium characteristic and SDL flow process are different from traditional Signaling System Number 7 (SS7) link, so the SCTP link is to carry out static state or dynamically foundation in theory.But on the external function characteristic, the SCTP link is equivalent to simulate the SS7 link and carries out work, this means the SCTP link that will adopt static configuration in the WCDMA R4 network, that is: pre-configured routing iinformation carries the wireless core network signaling.In addition, because the startup of Stream Control Transmission Protocol and pass closed procedure more complicated, in the process of foundation or dismounting link, the internal memory of signaling terminal and disposal ability expense are all quite big, so the SCTP link is not suitable for frequent dynamic foundation or dismounting.
During by Voice over IP, its networking structure schematic diagram as shown in Figure 1 in wireless core network.The networking structure of Voice over IP mainly comprises in the wireless core network: several MSC Server and a plurality of long-distance Mobile Switching Center Server (TMSC Server).The core net route adopts the mode of traditional public land communication network (PLMN), determines by the multistage route of MSC Server/TMSC Server.The level of concrete TMSC Server is divided and can be determined according to network size, and the pre-configured routing iinformation that contains the IP address in the system.Fig. 1 has provided a three-decker of Voice over IP networking in the wireless core network, and from the top down, ground floor is TMSC Server 1, and the second layer is that TMSC Server is MSC Server for 2, the three layers.If will realize communication between two MSCServer, originating end MSC Server will connect piecemeal according to pre-configured route data.It may directly be connected with purpose MSC Server, after also may connecting piecemeal by one or several TMSCServer, connects with purpose MSC Server again, and what path it will pass through actually, all is pre-configured.
As can be seen, this chain of command server hierarchies is network configuration end to end from said process, be not simplify most, IP kernel heart net the most efficiently, can not give full play to the prime advantage of the end-to-end route of IP network.Simultaneously, because the complexity of network, the networking cost is also higher relatively.
Summary of the invention
In view of this, the invention provides a kind of wireless internet protocol voice core net end-to-end routing method, make wireless network become planar structure, simplified network configuration, saved the networking cost from traditional hierarchy.
A kind of wireless internet protocol voice core net end-to-end routing method, this method are to realize like this.
A. after call subscriber terminal (UE) was initiated to the setup requests of calling mobile exchanging center server (MSC Server), this caller MSC Server obtained the routing iinformation that contains the called UE roaming number by MAP (MAP) signaling from called MS C Server;
B. caller MSC Server to the gatekeeper (GK) initiate to contain the address resolution request message of called UE roaming number;
After C.GK receives address resolution request message, judge whether to accept processing according to the called UE roaming number, if can, then return the affirmation response message that has called MS C Server IP address to caller MSC Server, enter step D then; Otherwise GK sends call rejection message, and caller MSC Server calls out termination;
D. caller MSC Server is initiated to the setup requests of called UE by called MS C Server.
This method further comprises:
When call subscriber terminal or called user terminal terminated call, behind the caller MSC Server call release, caller MSC Server sends call release message (DRQ) to GK; GK returns calling release acknowledge message or calls out the release refuse information after receiving DRQ message.
Caller MSC Server obtains routing iinformation and further comprises in the steps A:
A1. caller MSC Server sends out the routing iinformation that the MAP signaling is given called attaching position register (HLR) request acquisition called UE;
A2. after called HLR is received request, send the roaming number request to called MS C Server, after called MS C Server received the roaming number request, the roaming number that is about to called UE returned called HLR;
A3. after called HLR obtains the called UE roaming number, return the routing iinformation that contains the called UE roaming number to caller MSC Server.
Call control signalling between the described MSC Server is initial session protocol SIP/SIP-T.
Call control signalling between the described MSC Server is the call signaling BICC with bearer independent.
The bearer path of call control signalling is dynamically set up between the described MSC Server.
Described caller MSC Server is mobile switching centre's gateway server (GMSC Server).
Described MSC Server is mobile switching centre (MSC).
Described caller MSC Server is mobile switching centre's gateway (GMSC).
Registration in the utilization H.323 of the present invention, access authentication and state (RAS, Register, Admission andStatus) address resolution function of signaling and gatekeeper, realize between the MSC Server IP route end to end, this method makes wireless network become planar structure from the traditional batch structural transformation, the IP route of simplifying greatly not only, this method makes wireless network become planar structure from the traditional batch structural transformation, not only simplified network configuration greatly, owing to no longer need the routing function of TMSC Server, can be operator and save the networking cost simultaneously.
Description of drawings
Fig. 1 is traditional layering route network structural representation;
Fig. 2 realizes the networking structure schematic diagram of the end-to-end route of wireless ip voice core net for the present invention;
Fig. 3 realizes the signaling process figure of end-to-end route for the present invention.
Embodiment
Core content of the present invention is in global system for mobile communications (GSM) or WCDMA ip voice core net, introduce the RAS signaling in the protocol suite H.323, utilize H.323 the address resolution function of gatekeeper to realize between the MSC Server IP routing function end to end.
H.323 be the multimedia communication framework agreement that International Telecommunication Association (ITU-T) formulates, H.323 H.245 protocol suite comprises, H.225.0, T.120 and H.235 waits agreement.The RAS signaling be H.323 in the protocol family H.225.0 suggestion based on the GK of User Datagram Protoco (UDP) (UDP) transmission and other entity H.323, as the communication protocol between terminal and the gateway.Here used the access authentication in the RAS message, address resolution and modification code message and called out breakaway message, and address resolution message comprises address resolution request message (ARQ), confirms to answer message (ACF), call rejection message (ARJ); Calling out breakaway message comprises call release message (DRQ), discharges acknowledge message (DCF) and calls out release refuse information (DRJ).H.323GK be on the network one H.323 entity, it has functions such as access authentication, address resolution, Bandwidth Management, accounting management, district management, calling control, has used access authentication and the address resolution function of GK here.
Below in conjunction with the drawings and specific embodiments to further detailed explanation of the present invention.
Present embodiment is in wireless ip voice core net, by H.323RAS signaling and GK address resolution function, finishes the end-to-end routing function of MSC Server in the IP network.As shown in Figure 2, the networking structure of present embodiment mainly comprises: above MSC Server and GK.Wherein, solid line represents to call out route, and dotted line is represented H.323 RAS signaling inquiry.If will realize communication between the MSC Server, caller MSC Server will find the routing iinformation that contains called roaming number (MSRN) by called attaching position register (HLR), by GK under the caller MSC Server this roaming number is resolved to the IP address of called MS C Server again, initiate then to get final product to called setup requests SETUP.
Need to prove the call signaling concrete regulation not here between the MSC Server, can be initial session protocol (SIP/SIP-T), BICC or other signaling, as long as the signaling bear passage can dynamically be set up, not needing in advance, the static configuration signaling link gets final product.Because the application layer of SIP/SIP-T signaling own has error correction retransmission mechanism, generally is carried on the UDP; And the BICC application layer does not have error correction retransmission mechanism, generally is carried on SCTP or the transmission control protocol (TCP).Need bigger overhead because dynamically set up signalling path, so preferably, present embodiment adopts the SIP/SIP-T signaling.
As shown in Figure 3, in wireless ip voice core net, using H.323RAS, signaling and GK realize that the call flow of end-to-end route is as follows:
The call setup (Setup) of MSC Server under step 301, caller mobile subscriber terminal (UE) are initiated to;
Step 302, this caller MSC Server send routing information to called HLR by MAP (MAP) signaling;
After step 303, called HLR are received the MAP signaling, send the roaming number request, get the roaming number of called UE in the called MS C Server to called MS C Server;
After step 304, called MS C Server receive the roaming number request, search the roaming number of this called UE, and this roaming number is returned to called HLR;
After step 305, called HLR obtain the roaming number of called UE, promptly return routing iinformation to caller MSC Server;
Step 306, caller MSC Server receive this routing iinformation, have sprinkled address resolution request message (ARQ) to caller GK, carry the roaming number (MSRN) of called UE in this message;
Step 307, GK parse the IP address of called MS C Server according to the roaming number of called UE, and judge whether to accept to handle this message according to the IP address of called MS C Server, if can accept, then return and confirm to answer message (ACF) to caller MSC Server, and carry the called MS C Server IP address that parses in this message, enter step 308 then; If cannot accept, then GK sends call rejection message (ARJ), and caller MSC Server calls out termination;
Step 308, caller MSC Server initiate formal setup requests to called MS C Server, after called MS C Server receives, further make a call to set up to called UE and ask, and thus, setting up end to end between calling UE and the called UE, route connects.
Charge and resource management function if in the calling and called communication process, also need to finish, so, on the basis of above-mentioned flow process, can further include following steps:
After step 310, this GK receive DRQ message, return and call out release acknowledge message (DCF) or call out release refuse information (DRJ).
Called user terminal is UE among the present invention, and call subscriber terminal can be the user terminal of any network, such as, Integrated Service Digital Network and Public Switched Telephone Network (PSTN) are to the calling of UE, and these calling procedures and UE are on all four to the situation of UE.Because these network interfaces are GMSC Server, and because the present invention does not relate to the routing mechanism in PSTN or the ISDN scope, therefore, PSTN is presented as communicating by letter between GMSC Server and the called MS C Server in the present invention to the calling of UE.The called MS RN that GMSC Server returns according to called HLR carries out address resolution to GK, obtains the IP address of called MS C Server, directly to the foundation that makes a call of the IP address of called MS C Server.
Though MSC Server and MGW are two logical functional entities, both can realize on same physical entity, the physical entity of realizing as MSC Server and MGW such as: the mobile switching centre (MSC) that will support ip voice.Therefore, the present invention includes directly between MSC, adopt H.323RAS signaling and GK address resolution function to realize the situation of end-to-end route in the IP network.
End-to-end route technology of the present invention makes wireless network become planar structure from the traditional batch structural transformation, thereby all realizes end-to-end route in control of core net field and loading end.This method has not only been simplified network configuration greatly, owing to no longer need the routing function of TMSC Server, can be operator and saves a large amount of networking costs simultaneously.In addition, because H.323 network extensive use at present, and realized a plurality of national intercommunications, and use existing ripe H.323 GK system, not only can reduce technical risk, but also be easy to realize international network interworking.
Claims (9)
1, a kind of wireless internet protocol voice core net end-to-end routing method is characterized in that this method may further comprise the steps:
A. after call subscriber terminal UE was initiated to the setup requests of calling mobile exchanging center server MSC Server, this caller MSC Server obtained the routing iinformation that contains the called UE roaming number by MAP MAP signaling from called MS CServer;
B. caller MSC Server to the gatekeeper GK initiate to contain the address resolution request message of called UE roaming number;
After C.GK receives address resolution request message, judge whether to accept processing according to the called UE roaming number, if can, then return the affirmation response message that has called MS C Server IP address to caller MSC Server, enter step D then; Otherwise GK sends call rejection message, and caller MSC Server calls out termination;
D. caller MSC Server is initiated to the setup requests of called UE by called MS C Server.
2, method according to claim 1 is characterized in that, this method further comprises:
When call subscriber terminal or called user terminal terminated call, behind the caller MSC Server call release, caller MSC Server sends call release message DRQ to GK;
GK returns calling release acknowledge message or calls out the release refuse information after receiving DRQ message.
3, method according to claim 1 is characterized in that, caller MSC Server obtains routing iinformation and further comprises in the steps A:
A1. caller MSC Server sends out the routing iinformation that the MAP signaling is given called attaching position register HLR request acquisition called UE;
A2. after called HLR is received request, send the roaming number request to called MS C Server, after called MS C Server received the roaming number request, the roaming number that is about to called UE returned called HLR;
A3. after called HLR obtains the called UE roaming number, return the routing iinformation that contains the called UE roaming number to caller MSC Server.
4, method according to claim 1 is characterized in that, the call control signalling between the described MSC Server is initial session protocol SIP/SIP-T.
5, method according to claim 1 is characterized in that, the call control signalling between the described MSC Server is the call signaling BICC with bearer independent.
6, method according to claim 1 is characterized in that, the bearer path of call control signalling is dynamically set up between the described MSC Server.
7, method according to claim 1 is characterized in that, described caller MSC Server is the gateway server GMSC Server of mobile switching centre.
8, method according to claim 1 is characterized in that, described MSC Server is a moving exchanging center MSC.
9, method according to claim 1 is characterized in that, described caller MSC Server is the gateway GMSC of mobile switching centre.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02146484 CN1232136C (en) | 2002-11-12 | 2002-11-12 | An end-to-end routing method of voice core network in wireless internet protocol |
| AU2003280550A AU2003280550A1 (en) | 2002-11-12 | 2003-10-30 | An end-to-end route method for wireless internet protocol voice core network |
| PCT/CN2003/000920 WO2004045138A1 (en) | 2002-11-12 | 2003-10-30 | An end-to-end route method for wireless internet protocol voice core network |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 02146484 CN1232136C (en) | 2002-11-12 | 2002-11-12 | An end-to-end routing method of voice core network in wireless internet protocol |
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| CN1501721A CN1501721A (en) | 2004-06-02 |
| CN1232136C true CN1232136C (en) | 2005-12-14 |
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| CN 02146484 Expired - Fee Related CN1232136C (en) | 2002-11-12 | 2002-11-12 | An end-to-end routing method of voice core network in wireless internet protocol |
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Granted publication date: 20051214 Termination date: 20121112 |