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CN1281071C - A communication method for calling on the circuit switched domain of core networks of GSM/WCDMA - Google Patents

A communication method for calling on the circuit switched domain of core networks of GSM/WCDMA Download PDF

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Publication number
CN1281071C
CN1281071C CN03824772.0A CN03824772A CN1281071C CN 1281071 C CN1281071 C CN 1281071C CN 03824772 A CN03824772 A CN 03824772A CN 1281071 C CN1281071 C CN 1281071C
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message
sip
server
calling
call
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CN1695385A (en
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王洁
顾炯炯
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/10—Architectures or entities
    • H04L65/102—Gateways
    • H04L65/1043—Gateway controllers, e.g. media gateway control protocol [MGCP] controllers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/1066—Session management
    • H04L65/1069—Session establishment or de-establishment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/1066—Session management
    • H04L65/1083—In-session procedures
    • H04L65/1095—Inter-network session transfer or sharing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/1066—Session management
    • H04L65/1101—Session protocols
    • H04L65/1104—Session initiation protocol [SIP]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/08—Upper layer protocols
    • H04W80/10—Upper layer protocols adapted for application session management, e.g. SIP [Session Initiation Protocol]

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Business, Economics & Management (AREA)
  • General Business, Economics & Management (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Telephonic Communication Services (AREA)

Abstract

The present invention discloses a communication method for calling in a GSM/WCDMA core network circuit domain. In the method, calling signaling is established by an SIP/SIP-T protocol and mutually communicates among (G)MSCs or (G)MSC servers to solve the problem of the intercommunication of a WCDMA core network and a fixed NGN, CDMA 2000 core network in an ALLIP network very well. At the time, uniform SIP/SIP-T signaling is used among all the servers, and end-to-end routing replaces an original piecewise routing mode by other solutions, such as ENUM, routing servers, etc. A hierarchical network is changed into a planar network, which is helpful to simplifying a network structure and exerting the advantages of an IP network.

Description

The communication means of in GSM/WCDMA core net circuit domain, calling out
Technical field
The present invention relates to a kind of communication technical field, be specifically related to a kind of communication means of in GSM/WCDMA core net circuit domain, calling out.
Background technology
The main parallel circuit CS of WCDMA core net territory and grouping PS territory, the CS territory provides voice, fax and circuit type data service, and the PS territory provides Packet data service.Existing R99, R4, three versions of R5 before the WCDMA standard mesh, later release is formulated.
From WCDMA CS territory network configuration, R4 and R99 have bigger variation.R99 core net CS is made up of entities such as MSC, GMSC, HLR in the territory, and network architecture and GSM network basically identical carry and call signaling TUP/ISUP based on TDM between MSC.Fig. 1 has described existing 3GPPR4BICSCN network configuration.The R4 standard proposes the notion of BICSCN (Bearer IndependentCircuit Switching Core Network), promptly with the CS territory of bearer independent, mainly form by MSC server (MSC Server), GMSC server (GMSC Server), entities such as MGW, HLR, (G) adopt call signaling BICC between the MSC server, support many kinds of carryings of TDM/ATM/IP between MGW.(G) the H.248 agreement control MGW after the MSC server is expanded by 3GPP.
3GPP R4 selects BICC (independent call of the delivering letters control BearerIndependent Call Control) agreement of ITU-T formulation as call signaling between (G) MSC server, mainly be that BICC develops on the ISUP basis, inherit the design philosophy of most of traditional signaling message, supported TDM/ATM (AAL1, AAL2)/various carryings of IP of MGW.Consider R4 CS territory network architecture and present fixed network NGN, and LMSD (the Legency MS Domain of 3GPP2 (standardization body of cdma2000), the traditional mobile terminal territory) network architecture unanimity, the Server+MGW structure that promptly all adopts control and carrying to be separated.Present most producers of fixed network NGN and operator have adopted SIP/SIP-T as the call control signalling between the soft switch Softswitch, selected SIP/SIP-T as the call control signalling between the MSCe in the ALL IP standard of 3GPP2, the MSC server category among MSCe function and the WCDMA seemingly.SIP (SessionInitiation Protocol, Session initiation Protocol) is the IP phone signaling protocol that is proposed by IETF (Interne engineering duty group).As what its name implied, SIP is used for initiation session, it can control the foundation and the termination of the Multimedia session of a plurality of participants' participation, and can dynamically adjust and revise session attribute, as session bandwidth require, the code/decode format of the medium type (voice, video and data etc.) of transmission, medium, to the support of multicast and clean culture etc.
SIP has taken into full account the exaptation to other agreements in design.It supports many kinds of address descriptors and addressing, comprising: user name @ host address, Bei Jiaohaoma @PSTN gateway address and the description etc. of common E.164 telephone number as Tel:010-62281234.Like this, the SIP caller is according to called address, just can identify called whether online at black phone, then by a gateway that links to each other with the traditional electrical phone network to called initiation and set up calling.One of SIP advantage is a subscriber location function.SIP itself contains the function of oriented registrar registration, and also the location-server that can utilize other location-servers such as DNS, LDAP etc. to provide strengthens its positioning function.
SIP-T is a kind of application of SIP, has partly encapsulated the ISUP information unit or has translated the ISUP information unit at the net load of SIP, has adopted the calling control flow of Session Initiation Protocol to simplify ISUP control signaling simultaneously.
Because the various criterion tissue adopts different agreement, will bring the difficulty that interconnects between heterogeneous networks to the following ALL IP stage.
On the other hand, the protocol stack of the IP carrying BICC signaling of 3GPP definition is BICC/STCP/IP/L2/L1, and the STCP link is equivalent to traditional SS7 link, generally is static link, BICC signaling and TUP, ISUP signaling adopt identical route piecemeal under this mode, rather than routing mode end to end.At this moment, the radio core network key-course keeps hierarchy, promptly needs the TMSC server to finish the toll route function.This routing mode and network configuration should more be optimized in IP network.
Summary of the invention
The purpose of this invention is to provide the communication means of calling out in a kind of GSM/WCDMA of realization communication system, be used to overcome the deficiency that can not interconnect between above-mentioned different system.
The objective of the invention is to realize by following method, the communication means of calling out in a kind of GSM/WCDMA of realization communication system, described gsm communication system comprises (G) MSC, BSC, HLR, VLR, UE, described WCDMA communication system comprises (G) MSC server, MGW, HLR, VLR, RNC, UE, and the method comprising the steps of: between (G) MSC or (G) using SIP/SIP-T agreement is set up call signaling and is communicated mutually between the MSC server.
Further, this method also comprises between MGW with the IP network carrying, and (G) H.248 the MSC server adopts that agreement control MGW carries out Message Processing.
Concrete described method comprises one of following calling procedure at least:
Calling; Called calling; The calling that UE initiates discharges; The calling that network side is initiated discharges.
In addition, this method also comprises and sets up in the mobile network UE to the calling procedure of UE.
Concrete, described calling process is made of following steps:
The UE request of making a call;
MSC server response request is also constructed SIP-T INVITE template, and INVITE is mail to next hop address; The GMSC server is received the INVITE from the MSC server, and gives the MSC server to set up the upward stream of the loading end service media between the terminal T3 of last terminal T2 of MG1 and MG2 by the back transfer INFO;
The MSC server returns SIP-T ACK message to the GMSC server; Calling procedure carries end to end to set up and finishes.
Further, the step of this calling process comprises that also the GMSC server revises ISUP IAM source template according to the address message in the SIP-T message header, selects office direction and idle circuit, and final IAM message is mail to PSTN by SIGTRN/SG or SS7;
The GMSC server is received the ACM Address Complete Message from PSTN, and this message is encapsulated into the 180 ring Indication messages of SIP-T, and this 180 message is oppositely mail to the MSC server;
After the MSC server is received this message, from 180 message, parse the ACM information of encapsulation, notice calling UE called subscriber on;
The GMSC server is received the ANM response message from PSTN, and this message is encapsulated into the 200OK Indication message of SIP-T, and this 200OK message is oppositely mail to the MSC server;
After the MSC server is received this message, parse the ANM information of encapsulation from 200 message, the notice calling UE called subscriber reply.
Best, described calling process comprises that also the MSC server will turn to the step of the IAM message of ISUP from the calling domain of dependence in the caller Setup call setup message of Iu interface at the inside dress.
Best, described calling process also is included in after the GMSC server receives the INVITE of MSC server, finds wherein to comprise the encapsulation of ISUP IAM, then directly with the step of this message content as the template of the ISUP IAM message of waiting to mail to PSTN.
Concrete, the step of described structure INVITE template comprises according to called number fills in the sip address territory, and the SDP message of MG1 trunk side terminal T1 is filled in into SIP INVITE template.
In addition, described called calling procedure may further comprise the steps:
The GMSC server receives the ISUP IAM message from PSTN;
GMSC server constructs SIP-T INVITE template, and be that the address information forward direction sends the SIP-T INVITE to get roaming number;
The MSC server is oppositely passed the SIP-T INFO back the GMSC server, with the stream of the loading end service media between the terminal T3 of the terminal T2 that sets up different MG2 and MG1.
The GMSC server returns SIP-T ACK message to the MSC server; Called flow carries end to end to set up and finishes.
Further, described called calling procedure is further comprising the steps of
The MSC server is received Alerting called terminal ringing message from the Iu interface, constructs corresponding ISUP ACM message, and this message is encapsulated into the 180 ring Indication messages of SIP-T, hereinafter to be referred as 180 message, and this 180 message is oppositely mail to the GMSC server;
After the GMSC server is received SIP-T 180 message from the MSC server, from this message, parse the ACM information of encapsulation, with this message is template, carry out necessary modification according to 180 message header information after, final ACM message is mail to PSTN by SIGTRAN/SG or SS7;
The MSC server is received connection (Connect) response message from the Iu interface, according to the ANM of this message constructing ISUP, and this message is encapsulated into the success response message of SIP-T, as the 200OK Indication message, hereinafter to be referred as 200 message, and this 200 message oppositely mail to the GMSC server;
After the GMSC server is received SIP-T 200 message from the MSC server, from this message, parse the ANM information of encapsulation, with this message is template, carry out necessary modification according to 200 message header information after, final ANM is mail to PSTN by SIGTRAN/SG or SS7.
Best, after receiving the ISUP IAM message of PSTN, the GMSC server distributes ISUP circuit terminal T1 and context C1 resource by H.248/MGCP ordering control MG2, initiates routing inquiry to HLR behind the analysis number attribute.
Concrete, the SIP-T INVITE template of described structure wherein comprises the SDP message of terminal T2, and Incoming side IAM message is encapsulated into the message body part.
In addition, the calling dispose procedure of described UE initiation may further comprise the steps:
The MSC server is received (Disconnect) order of taking out stitches from UE;
MSC server constructs SIP-T BYE message;
The GMSC server is filled in ISUP REL message and by SIGTRAN/SG or SS7 this message is mail to PSTN after receiving BYE message from the MSC server;
After the MSC server is received 200OK message from the GMSC server, discharge the terminal T2 of R4 core net trunk side by issuing order request MG1 H.248/MGCP;
The MSC server is initiated the release signaling flow process to discharge air interface and terrestrial links resource to Iu, receive that Iu discharges response after, discharge the terminal T1 of wireless access network side by issuing order request MG1 H.248/MGCP.
Concrete, the step of described structure SIP-T BYE message is included in encapsulation ISUP REL call release message in the message, and fills in the BYE message header and mail to purpose GMSC server according to the address of having set up, opposite end.
In addition, the described network side process that discharges that makes a call may further comprise the steps:
The GMSC server is received the REL disconnect command from PSTN;
GMSC server constructs SIP-T BYE message;
The MSC server is received (Disconnect) message of taking out stitches of filling in the Iu interface after the BYE message from the GMSC server, and this message is mail to UE;
The MSC server obtains SIP-T is afterwards returned in 200OK message from the MG1 response to the GMSC server by issuing the H.248/MGCP terminal T2 of order request MG1 release R4 core net trunk side, has wherein encapsulated the RLC message of ISUP; The GMSC server is after the 200OK message of receiving from the MSC server, after the ISUP RLC message that parsing wherein encapsulates, by issuing the H.248/MGCP terminal T3 of order request MG1 release R4 core net trunk side;
The MSC server is initiated the release signaling flow process to discharge air interface and terrestrial links resource to Iu subsequently, receive that Iu discharges response after, discharge the terminal T1 of wireless access network side by issuing order request MG1 H.248/MGCP;
Concrete, the step of described structure BYE message comprises, encapsulates the ISUP REL call release message from PSTN in described BYE message, and fills in the BYE message header and mail to purpose MSC server according to the address, opposite end of the calling of having set up.
In addition, UE calls out to the office of striding of UE in the described mobile network, is equivalent to the merging of UE caller and called flow, and deletion GMSC server entity and corresponding SIP-T/ISUP intercommunication translation function thereof.
Further, described method comprises that also the routing mode piecemeal with in the end-to-end route replacement employing Bearer Independent Call Control Protocol becomes planar network with hierarchical network by adopting ENUM or routing server solution.
Best, this method also is included in and increases extension field in the INVITE of SIP-T and the INFO and be used to transmit the Codec message that mobile calling and called terminal or media gateway are supported, to support the outer codec negotiation ability of TrFO band.
Because the present invention solves in the ALL IP network intercommunication of WCDMA core net and fix N GN, cdma2000 core net well by introducing the SIP/SIP-T call signaling between the MSC server at wireless core network MSC server with (G).At this moment all adopt unified SIP/SIP-T signaling between all Server.
After adopting the SIP/SIP-T signaling, can replace original routing mode piecemeal with end-to-end route, hierarchical network is become planar network, will help to simplify network configuration and performance IP network advantage by other as routing solutions such as ENUM, routing servers.
Description of drawings
Fig. 1 is existing 3GPP R4BICSCN network configuration;
Fig. 2 is the CS territory network configuration based on SIP-T of embodiment of the present invention;
Fig. 3 is calling (calling that the UE initiates) flow process of embodiment of the present invention;
Fig. 4 is the called call flow (calling that network side is initiated) of embodiment of the present invention;
Fig. 5 is that the calling that the UE of embodiment of the present invention initiates discharges flow process;
Fig. 6 is that the calling that the network side of embodiment of the present invention is initiated discharges flow process.
Embodiment
For those skilled in the art better understands the present invention, embodiments of the present invention are described below in conjunction with accompanying drawing.
General WCDMA communication system comprises devices such as (G) MSC server, MGW, HLR, VLR, RNC, UE.
Fig. 2 has described the CS territory network configuration based on SIP-T of embodiment of the present invention, CS territory network architecture mainly is made up of MSC server, GMSC server, MGW, BSS in the WCDMA communication system, situation about interconnecting after considering, the present invention proposes at the MSC server and (G) adopt the call signaling of SIP/SIP-T between the MSC server, and the R4 standard is still followed in the control of other parts, be that MSC server/GMSC server adopts H.248 agreement control MGW, IP available carrying between the MGW.
The present invention will be further described below in conjunction with call flow, is the flow process of the calling (calling that UE initiates) of embodiment of the present invention as shown in Figure 3, and described calling flow process may further comprise the steps:
At first, in step 1, UE is initiated to the call setup (Setup) of MSC server, and the MSC server returns calling procedure (Call proceeding), and by H.248/MGCP indicating newly-increased R4 core net trunk side terminal (T2) and context (C1) resource of distributing of MG1.Then, in step 2, the MSC server will set up that to call out the domain of dependence (calling number, called number, user property, bearing capacity, professional indication etc.) in (Setup) message be the IAM message of ISUP in internal conversion from the calling of Iu interface.
In step 3, MSC server constructs SIP-T INVITE template, fill in the sip address territory according to called number, the SDP information of MG1 trunk side terminal T1 is filled in into the INVITE body, and the ISUP IAM message of step 2 structure is inserted the SIPINVITE source template as message body extension, and INVITE is mail to next hop address.
In step 4, (G) (may transmit or redirect is redirected) after the MSC server is received INVITE from the MSC server through some proxy, find wherein to comprise the encapsulation of ISUP IAM, then directly with the template of this message content as the ISUP IAM message of waiting to mail to PSTN.
In step 5, the GMSC server passes through H.248/MGCP newly-increased R4 core-network side terminal (T3) and context (C3) resource, the SDP information of having carried distance terminal T2 simultaneously in this order of distributing of agreement indication MG2.
In step 6, the GMSC server by INFO with the SDP information of terminal T3 after to transmitting back the MSC server, the MSC server is revised the attribute that MG1 goes up terminal T2 according to this information, the SDP information of its distance terminal T3 is handed down to terminal T2, has just set up loading end service media stream like this between the T3 of the T2 of MG1 and MG2.
In step 7, the MSC server passes through H.248/MGCP protocol requirement MG1 further terminal T1 that adds wireless access network one side in the C1 context, then issues the RAB assignment to distribute air interface and Iu interface bearing face resource (having carried the bearing association information of terminal T1 in this message).Step 7 can walk abreast with step 4,5,6 in time.
In step 8, the GMSC server is revised ISUP IAM source template according to the address information in the SIP-T message header, selects office direction and idle circuit, and final IAM message is mail to PSTN by SIGTRAN/SG or SS7;
In step 9, the GMSC server is received the ACM Address Complete Message from PSTN, and this message is encapsulated into the 180 ring Indication messages of SIP-T, and this 180 message is oppositely mail to the MSC server;
In step 10, after the MSC server is received this message, from 180 message, parse the ACM information of encapsulation, be the Alerting message of Iu interface with related protocol domain information reverse conversion, notice calling UE called subscriber on;
In step 11, the GMSC server is received the ANM response message from PSTN, and this message is encapsulated into the 200OK Indication message of SIP-T, and this 200OK message is oppositely mail to the MSC server;
In step 12, after the MSC server is received this message, from 200 message, parse the ANM information of encapsulation, with related protocol domain information reverse conversion is the connection message of Iu interface, the notice calling UE called subscriber reply, by protocol command MG1 H.248/MGCP T1 is revised as two-way connection with back unidirectional connection the between the T2 simultaneously, returns SIP-T ACK message to the GMSC server at last; Calling procedure carries end to end to set up and finishes.
Shown in Figure 4 is the called call flow (calling that network side is initiated) of embodiment of the present invention, and described called call flow may further comprise the steps:
At first, in step 11, the GMSC server receives the ISUP IAM message from PSTN, distributes ISUP circuit terminal (T1) and context (C1) resource by H.248/MGCP ordering control MG2, initiates routing inquiry to HLR behind the analysis number attribute;
Then, in step 12, the GMSC server is being got route simultaneously, can distribute R4 core-network side terminal (T2) resource in context C1 by H.248/MGCP ordering control MG2;
Again, in step 13, GMSC server constructs SIP-T INVITE template wherein comprises the SDP information of terminal T2, and Incoming side IAM message is encapsulated into the message body part, and be that the address information forward direction sends the SIP-T INVITE to get roaming number;
In step 14, after receiving INVITE from the GMSC server, (may transmit or redirect is redirected) the MSC server through some proxy, find wherein to comprise the encapsulation of ISUP IAM, resolve called number information (roaming number) wherein, the paging and the authentication process of initiating called UE behind the inquiry VLR;
Then, result according to top step, in step 15, the MSC server is after called paging and authentication are passed through, mail to the Setup message of called UE in internal conversion for the Iu interface according to the calling domain of dependence in the IAM message that encapsulates among the INVITE (calling number, called number, user property, bearing capacity, professional indication etc.), and receive the CallConfirmed response from called UE;
In step 16, the MSC server distributes R4 core-network side terminal (T3) and context (C2) resource by H.248/MGCP ordering control MG1, wherein carried the SDP information that has comprised distance terminal T2 among the INVITE, then oppositely pass the local SDP information of T3 back the GMSC server by SIP-TINFO message, the GMSC server is revised the attribute that MG2 goes up terminal T2 according to this information, the SDP information of its distance terminal T3 is handed down to terminal T2, has just set up loading end service media stream like this between the T3 of the T2 of MG2 and MG1; This step can be parallel with step 15;
In step 17, the MSC server passes through H.248/MGCP protocol requirement MG1 further terminal T4 that adds wireless access network one side in the C2 context, then issues the RAB assignment to distribute air interface and Iu interface bearing face resource (having carried the bearing association information of terminal T4 in this message).
In step 18, the MSC server is received Alerting called terminal ringing message from the Iu interface, constructs corresponding ISUP ACM message, and this message is encapsulated into the 180 ring Indication messages of SIP-T, and this 180 message is oppositely mail to the GMSC server;
In step 19, after the MSC server is received Iu interface Alerting message, by H.248/MGCP agreement control MG1 is back to playing in-band ringback tone on the terminal T3 of R4 core-network side;
In step 20, after the GMSC server is received SIP-T 180 message from the MSC server, parsing the ACM information of encapsulation from this message, is template with this message, after carrying out necessary modification according to 180 message header information, final ACM message is mail to PSTN by SIGTRAN/SG or SS7;
In step 21, the MSC server is received the connection response message from the Iu interface, according to the ANM of this message constructing ISUP, and this message is encapsulated into the 200OK Indication message of SIP-T, and this 200OK message is oppositely mail to the GMSC server;
In step 22, after the MSC server was received Iu interface connection message, MG1 stopped the back to playing RBT on the terminal T3 of R4 core-network side by the control of agreement H.248/MGCP, and wireless access lateral terminal T4 is revised as with T3 is two-way was connected;
In step 23, after the GMSC server is received SIP-T 200 message from the MSC server, from this message, parse the ANM information of encapsulation, with this message is template, after carrying out necessary modification according to 200 message header information, final ANM is mail to PSTN by SIGTRAN/SG or SS7, return SIP-T ACK message to the GMSC server simultaneously; Called flow carries end to end to set up and finishes.
Shown in Figure 5 is the calling release flow process of the UE initiation of embodiment of the present invention, and described release flow process may further comprise the steps:
In step 31, the MSC server is received the disconnect command Disconnect from UE, sends its call release control resource of release (Release) order request to UE, and receives that from UE the control resource discharges the response of finishing.
In step 32, MSC server constructs SIP-T BYE message encapsulates the ISUPREL call release message therein, and fills in the BYE message header and mail to purpose GMSC server according to the address, opposite end of setting up calling;
In step 33, after the GMSC server is received BYE message from the MSC server, find that the ISUP REL that wherein comprises encapsulates, resolve information such as release cause wherein, fill in ISUP REL message in view of the above and this message is mail to PSTN by SIGTRAN/SG or SS7;
In step 34, the GMSC server obtains SIP-T is afterwards returned in 200OK message from the MG2 response to the MSC server by issuing the H.248/MGCP terminal T3 of order request MG2 release R4 core net trunk side, has wherein encapsulated the RLC message of ISUP; The GMSC server is after the ISUP RLC message of receiving from PSTN, by issuing the H.248/MGCP terminal T4 of order request MG2 release PSTN side;
In step 35, after the MSC server is received 200OK message from the GMSC server, discharge the terminal T2 of R4 core net trunk side by issuing order request MG1 H.248/MGCP;
In step 36, the MSC server is initiated the release signaling flow process to discharge air interface and terrestrial links resource to Iu, receive that Iu discharges response after, discharge the terminal T1 of wireless access network side by issuing order request MG1 H.248/MGCP.
Shown in Figure 6 is the calling release flow process of the network side initiation of embodiment of the present invention, and described release flow process comprises:
In step 41, the GMSC server is received the REL disconnect command from PSTN, and order request MG2 discharges the terminal T4 of PSTN side and the terminal T3 of R4 core-network side by issuing H.248/MGCP;
In step 42, GMSC server constructs SIP-T BYE message encapsulates the ISUP REL call release message from PSTN therein, and fills in the BYE message header and mail to purpose MSC server according to the address, opposite end of setting up calling;
In step 43, after the MSC server is received BYE message from the GMSC server, find the ISUP REL encapsulation that wherein comprises, resolve information such as release cause wherein, fill in the clear message (Disconnect) of Iu interface in view of the above, and this message is mail to UE;
In step 44, the MSC server obtains SIP-T is afterwards returned in 200OK message from the MG1 response to the GMSC server by issuing the H.248/MGCP terminal T2 of order request MG1 release R4 core net trunk side, has wherein encapsulated the RLC message of ISUP; The GMSC server is after the 200OK message of receiving from the MSC server, after the ISUP RLC message that parsing wherein encapsulates, by issuing the H.248/MGCP terminal T3 of order request MG1 release R4 core net trunk side;
In step 45, the MSC server is received release (Release) the request back call release related resource from UE, and returns the response that release is finished to UE;
In step 46, the MSC server is initiated the release signaling flow process to discharge air interface and terrestrial links resource to Iu subsequently, receive that Iu discharges response after, discharge the terminal T1 of wireless access network side by issuing order request MG1 H.248/MGCP; Step 45,46 in time can be parallel with step 44.
Foregoing description the call flow example describe respectively UE to PSTN and PSTN under the UE call case, SIP-T flow process between the MSC of end office (EO) server and the GMSC server, and call out to the mobile network interior span office of UE for UE, be equivalent to the merging of UE caller and called flow, and deletion GMSC server entity and corresponding SIP-T/ISUP intercommunication translation function thereof), no longer repeat at this.
In order to realize above-mentioned calling procedure, (G) H.248/MGCP the interface between MSC server and the MG need do suitable expansion on the agreement basis;
In addition, be to support the outer codec negotiation ability of TrFO band, need in the INVITE of SIP-T and INFO, increase the Codec information that extension field is used to transmit mobile calling and called terminal or media gateway support, as AMR, FR, EFR, WB-AMR etc.;
Because control can be applied to GSM network or WCDMA network equally with the network architecture that carrying separates.The present invention introduces the SIP/SIP-T signaling as MSC server and (G) call control signalling between the MSC server in the GSM or WCDMA wireless core network of Voice over IP.Because (G) MSC server and MGW belong to logical functional entity, also both can be realized on same physical entity in realization, be similar to MSC that the ip voice bearing interface is provided and (G) MSC, so this patent is included in MSC and (G) situation of employing SIP/SIP-T signaling between MSC.
Above-mentioned flow process has been described the normal flow of basic calling and called of the present invention, application and flow process for Session Initiation Protocol in each supplementary service, IN service and the unusual flow process can realize principle and thinking with reference to above-mentioned basic procedure, and draft-ietf-sipping-isup-06 (the mapping standard of ISUP and SIP) and the draft-ietf-sipping-sipt-04 (SIP-T standard) of TS 23.218 (call flow), the IETF of 3GPP.
Though described the present invention, it will be recognized by those skilled in the art that not break away from connotation of the present invention that those skilled in the art can make and improve and revise by embodiment.Therefore claim should comprise these improvement and modification.

Claims (19)

1、一种在GSM/WCDMA核心网电路域中进行呼叫的通信方法，所述GSM通信系统包括MSC/GMSC、BSC、HLR、VLR、UE，所述WCDMA通信系统包括MSC/GMSC服务器、MGW、HLR、VLR、RNC、UE，该方法包括步骤：在MSC/GMSC间或MSC/GMSC服务器间应用SIP/SIP-T协议建立呼叫信令，并采用端到端的路由方式，相互进行通信。1. A communication method for calling in the GSM/WCDMA core network circuit domain, the GSM communication system includes MSC/GMSC, BSC, HLR, VLR, UE, and the WCDMA communication system includes MSC/GMSC server, MGW, HLR, VLR, RNC, UE, the method includes the steps of: applying SIP/SIP-T protocol to establish call signaling between MSC/GMSC or MSC/GMSC servers, and adopting end-to-end routing mode to communicate with each other. 2、根据权利要求1所述的在GSM/WCDMA核心网电路域中进行呼叫的通信方法，所述MGW间用IP网承载，MSC/GMSC服务器采用H.248协议控制MGW进行消息处理。2. The communication method for calling in the GSM/WCDMA core network circuit domain according to claim 1, wherein the MGWs are carried by an IP network, and the MSC/GMSC server uses the H.248 protocol to control the MGW to process messages. 3、根据权利要求1所述的在GSM/WCDMA核心网电路域中进行呼叫的通信方法，所述端到端路由方式是通过采用ENUM或路由服务器解决方案实现的。3. The communication method for making a call in the GSM/WCDMA core network circuit domain according to claim 1, wherein the end-to-end routing mode is realized by adopting ENUM or routing server solutions. 4、根据权利要求1所述的在GSM/WCDMA核心网电路域中进行呼叫的通信方法，还包括在SIP-T的INVITE及INFO消息中增加扩展域用于传送移动主被叫终端或媒体网关支持的Codec消息，以支持TrFO带外Codec协商能力。4. The communication method for calling in the GSM/WCDMA core network circuit domain according to claim 1, further comprising adding an extension domain in the INVITE and INFO messages of SIP-T for transmitting the mobile calling and called terminals or media gateways Supported Codec messages to support TrFO out-of-band Codec negotiation capability. 5、根据上述权利要求之一所述的在GSM/WCDMA核心网电路域中进行呼叫的通信方法，至少包括以下呼叫过程之一：5. The communication method for calling in the GSM/WCDMA core network circuit domain according to any one of the preceding claims, at least including one of the following calling procedures: 主叫呼叫；calling call; 被叫呼叫；Called call; UE发起的呼叫释放；Call release initiated by UE; 网络侧发起的呼叫释放。The call initiated by the network side is released. 6、根据权利要求5所述的在GSM/WCDMA核心网电路域中进行呼叫的通信方法，还包括建立移动网内UE到UE的呼叫跨局过程。6. The communication method for making a call in the circuit domain of the GSM/WCDMA core network according to claim 5, further comprising establishing an inter-office call procedure from UE to UE in the mobile network. 7、根据权利要求6所述的在GSM/WCDMA核心网电路域中进行呼叫处理的通信方法，所述移动网内UE到UE的跨局呼叫过程，是指主叫呼叫和被叫呼叫过程的合并，并删除MSC/GMSC服务器实体及其对应的SIP-T/ISUP互通转换功能。7. The communication method for call processing in the GSM/WCDMA core network circuit domain according to claim 6, wherein the inter-office call process from UE to UE in the mobile network refers to the calling process and the called process. Merge and delete the MSC/GMSC server entity and its corresponding SIP-T/ISUP interworking conversion function. 8、根据权利要求7所述的在GSM/WCDMA核心网电路域中进行呼叫的通信方法，所述主叫呼叫过程由以下步骤构成：8. The communication method for calling in the GSM/WCDMA core network circuit domain according to claim 7, the calling process of the calling party is composed of the following steps: UE发起呼叫请求；UE initiates a call request; MSC服务器响应请求并构造SIP-T INVITE消息，并将INVITE消息发往下一跳地址；The MSC server responds to the request and constructs a SIP-T INVITE message, and sends the INVITE message to the next hop address; GMSC服务器收到来自MSC服务器的INVITE消息，并通过反向传递INFO消息给MSC服务器以建立MG1上终端T2和MG2上终端T3之间的承载面业务媒体流；The GMSC server receives the INVITE message from the MSC server, and sends the INFO message back to the MSC server to establish a bearer plane service media flow between the terminal T2 on MG1 and the terminal T3 on MG2; MSC服务器向GMSC服务器返回SIP-T ACK消息；主叫流程端到端的承载建立完毕。The MSC server returns a SIP-T ACK message to the GMSC server; the end-to-end bearer of the calling process is established. 9.根据权利要求8所述的在GSM/WCDMA核心网电路域中进行呼叫处理的通信方法，还包括步骤：9. The communication method for call processing in the GSM/WCDMA core network circuit domain according to claim 8, further comprising the steps of: GMSC服务器根据SIP-T消息头中的地址消息修改ISUP IAM消息模板，选择局向及空闲电路，并将最终的IAM消息通过SIGTRN/SG或SS7发往PSTN；The GMSC server modifies the ISUP IAM message template according to the address message in the SIP-T message header, selects the office route and idle circuit, and sends the final IAM message to PSTN through SIGTRN/SG or SS7; GMSC服务器从PSTN收到ACM地址全消息，将该消息封装入SIP-T的振铃指示消息，并将该振铃指示消息反向发往MSC服务器；The GMSC server receives the full message of the ACM address from the PSTN, encapsulates the message into a SIP-T ringing indication message, and sends the ringing indication message to the MSC server in reverse; MSC服务器收到该消息后，从振铃指示消息中解析出封装的ACM信息，通知主叫UE被叫用户已接通；After receiving the message, the MSC server parses the encapsulated ACM information from the ringing indication message, and notifies the calling UE that the called user has been connected; GMSC服务器从PSTN收到ANM应答消息，将该消息封装入SIP-T的成功响应消息，并将该成功响应消息反向发往MSC服务器；The GMSC server receives the ANM response message from the PSTN, encapsulates the message into a SIP-T success response message, and sends the success response message back to the MSC server; MSC服务器收到该消息后，从成功响应消息中解析出封装的ANM信息，通知主叫UE被叫用户已应答。After receiving the message, the MSC server parses the encapsulated ANM information from the successful response message, and notifies the calling UE that the called user has answered. 10、根据权利要求9所述的在GSM/WCDMA核心网电路域中进行呼叫的通信方法，所述主叫呼叫过程还包括MSC服务器将来自Iu接口的主叫Setup呼叫建立消息中呼叫相关域在内部装化为ISUP的IAM消息的步骤。10. The communication method for making a call in the GSM/WCDMA core network circuit domain according to claim 9, the calling process further comprises that the MSC server transfers the call-related field in the calling Setup message from the Iu interface to the Steps to internally load IAM messages for ISUP. 11、根据权利要求9所述的在GSM/WCDMA核心网电路域中进行呼叫的通信方法，所述主叫呼叫过程还包括在GMSC服务器收到MSC服务器的INVITE消息后，发现其中包含ISUP IAM的封装，则直接将该消息内容作为待发往PSTN的ISUP IAM消息的模板的步骤。11. The communication method for making a call in the GSM/WCDMA core network circuit domain according to claim 9, the calling process further includes that after the GMSC server receives the INVITE message from the MSC server, it finds that it contains the ISUP IAM encapsulation, then directly use the message content as the template of the ISUP IAM message to be sent to the PSTN. 12、根据权利要求9所述的在GSM/WCDMA核心网电路域中进行呼叫的通信方法，所述构造INVITE消息模板的步骤包括根据被叫号码填写SIP地址域，将MG1中继侧终端T1的SDP消息填写入SIP INVITE消息模板。12. The communication method for calling in the circuit domain of the GSM/WCDMA core network according to claim 9, the step of constructing the INVITE message template includes filling in the SIP address field according to the called number, and adding the MG1 relay side terminal T1 The SDP message is filled in the SIP INVITE message template. 13、根据权利要求5所述的在GSM/WCDMA核心网电路域中进行呼叫的通信方法，所述的被叫呼叫过程包括以下步骤：13. The communication method for making a call in the GSM/WCDMA core network circuit domain according to claim 5, the called call process comprising the following steps: GMSC服务器接收到来自PSTN的ISUP IAM消息；GMSC server receives ISUP IAM message from PSTN; GMSC服务器构造SIP-T INVITE消息模板，并以取到漫游号码为地址信息前向发出SIP-T INVITE消息；The GMSC server constructs a SIP-T INVITE message template, and sends a SIP-T INVITE message forward with the obtained roaming number as the address information; MSC服务器将SIP-T INFO消息反向传回GMSC服务器，以建立不同的MG2的终端T2与MG1的终端T3之间的承载面业务媒体流．The MSC server reversely transmits the SIP-T INFO message back to the GMSC server to establish different bearer plane service media streams between the terminal T2 of MG2 and the terminal T3 of MG1. GMSC服务器向MSC服务器返回SIP-T ACK消息；被叫流程端到端的承载建立完毕。The GMSC server returns a SIP-T ACK message to the MSC server; the end-to-end bearer of the called process is established. 14.根据权利要求13所述的在GSM/WCDMA核心网电路域中进行呼叫的通信方法，还包括以下步骤14. The communication method for calling in the GSM/WCDMA core network circuit domain according to claim 13, further comprising the following steps MSC服务器从Iu接口收到Alerting被叫振铃消息，构造对应ISUP ACM消息，并将该消息封装入SIP-T的振铃指示消息，并将该振铃指示消息反向发往GMSC服务器；The MSC server receives the Alerting called ringing message from the Iu interface, constructs a corresponding ISUP ACM message, and encapsulates the message into the ringing indication message of SIP-T, and sends the ringing indication message to the GMSC server in reverse; GMSC服务器收到来自MSC服务器的SIP-T振铃指示消息后，从该消息中解析出封装的ACM信息，以该消息为模板，根据振铃指示消息头信息进行必要修改后，将最终的ACM消息通过SIGTRAN/SG或SS7发往PSTN；After the GMSC server receives the SIP-T ringing indication message from the MSC server, it parses the encapsulated ACM information from the message, uses the message as a template, and after making necessary modifications according to the ringing indication message header information, the final ACM The message is sent to PSTN via SIGTRAN/SG or SS7; MSC服务器从Iu接口收到连接应答消息，根据该消息构造ISUP的ANM消息，并将该消息封装入SIP-T的成功响应消息，并将该成功响应消息反向发往GMSC服务器；The MSC server receives the connection response message from the Iu interface, constructs the ANM message of ISUP according to the message, encapsulates the message into the successful response message of SIP-T, and sends the successful response message to the GMSC server in reverse; GMSC服务器收到来自MSC服务器的SIP-T成功响应消息后，从该消息中解析出封装的ANM信息，以该消息为模板，根据成功响应消息头信息进行必要修改后，将最终的ANM消息通过SIGTRAN/SG或SS7发往PSTN。After the GMSC server receives the SIP-T success response message from the MSC server, it parses the encapsulated ANM information from the message, uses the message as a template, and after making necessary modifications according to the header information of the successful response message, passes the final ANM message through SIGTRAN/SG or SS7 sent to PSTN. 15、根据权利要求14所述的在GSM/WCDMA核心网电路域中进行呼叫的通信方法，所述的构造的SIP-T INVITE消息模板，其中包含终端T2的SDP消息，并将入局侧IAM消息封装入消息体部分。15. The communication method for calling in the GSM/WCDMA core network circuit domain according to claim 14, the SIP-T INVITE message template of the structure includes the SDP message of the terminal T2, and the IAM message of the incoming side Encapsulated into the message body part. 16、根据权利要求5所述的在GSM/WCDMA核心网电路域中进行呼叫的通信方法，所述的UE发起的呼叫释放过程包括以下步骤：16. The communication method for making a call in the circuit domain of the GSM/WCDMA core network according to claim 5, the call release process initiated by the UE comprises the following steps: MSC服务器收到来自UE的拆线命令；The MSC server receives a disconnection command from the UE; MSC服务器构造SIP-T BYE消息；The MSC server constructs a SIP-T BYE message; GMSC服务器收到来自MSC服务器的BYE消息后填写ISUP REL消息并通过SIGTRAN/SG或SS7将该消息发往PSTN；After receiving the BYE message from the MSC server, the GMSC server fills in the ISUP REL message and sends the message to PSTN via SIGTRAN/SG or SS7; MSC服务器收到来自GMSC服务器的成功响应消息后，通过下发H.248/MGCP命令要求MG1释放R4核心网中继侧的终端T2；After receiving the successful response message from the GMSC server, the MSC server sends an H.248/MGCP command to request MG1 to release the terminal T2 on the relay side of the R4 core network; MSC服务器向Iu发起释放信令流程以释放空中接口及地面链路资源，收到Iu释放响应后，通过下发H.248/MGCP命令要求MG1释放无线接入网侧的终端T1。The MSC server initiates a release signaling process to Iu to release the air interface and ground link resources, and after receiving the Iu release response, the MSC server sends an H.248/MGCP command to request MG1 to release the terminal T1 on the radio access network side. 17、根据权利要求16所述的在GSM/WCDMA核心网电路域中进行呼叫处理的通信方法，所述构造SIP-T BYE消息的步骤包括在消息中封装ISUP REL呼叫释放消息，并根据已建立的对端地址填写BYE消息头并发往目的GMSC服务器。17. The communication method for call processing in the GSM/WCDMA core network circuit domain according to claim 16, said step of constructing a SIP-T BYE message includes encapsulating an ISUP REL call release message in the message, and according to the established Fill in the BYE message header with the peer address and send it to the destination GMSC server. 18、根据权利要求5所述的在GSM/WCDMA核心网电路域中进行呼叫的通信方法，所述的网络侧发起呼叫释放的过程包括以下步骤：18. The communication method for making a call in the GSM/WCDMA core network circuit domain according to claim 5, wherein the process of initiating call release by the network side comprises the following steps: GMSC服务器收到来自PSTN的REL拆线命令；The GMSC server receives the REL disconnection command from the PSTN; GMSC服务器构造SIP-T BYE消息；The GMSC server constructs a SIP-T BYE message; MSC服务器收到来自GMSC服务器的BYE消息后填写Iu接口的拆线消息，并将该消息发往UE；After receiving the BYE message from the GMSC server, the MSC server fills in the disconnection message of the Iu interface, and sends the message to the UE; MSC服务器通过下发H.248/MGCP命令要求MG1释放R4核心网中继侧的终端T2，得到MG1响应后向GMSC服务器返回SIP-T的200OK消息，其中封装了ISUP的RLC消息；GMSC服务器在收到来自MSC服务器的成功响应消息后，解析其中封装的ISUP RLC消息后，通过下发H.248/MGCP命令要求MG1释放R4核心网中继侧的终端T3；The MSC server sends an H.248/MGCP command to request MG1 to release the terminal T2 on the trunk side of the R4 core network, and returns a SIP-T 200OK message to the GMSC server after receiving a response from MG1, which encapsulates the RLC message of ISUP; After receiving the successful response message from the MSC server, after parsing the encapsulated ISUP RLC message, request MG1 to release the terminal T3 on the relay side of the R4 core network by issuing an H.248/MGCP command; MSC服务器随后向Iu发起释放信令流程以释放空中接口及地面链路资源，收到Iu释放响应后，通过下发H.248/MGCP命令要求MG1释放无线接入网侧的终端T1；The MSC server then initiates a release signaling process to Iu to release the air interface and ground link resources. After receiving the Iu release response, the MSC server sends an H.248/MGCP command to request MG1 to release the terminal T1 on the radio access network side; 19、根据权利要求18所述的在GSM/WCDMA核心网电路域中进行呼叫的通信方法，所述的构造BYE消息的步骤包括，在所述BYE消息中封装来自PSTN的ISUP  REL呼叫释放消息，并根据已建立的呼叫的对端地址填写BYE消息头并发往目的MSC服务器。19. The communication method for calling in the GSM/WCDMA core network circuit domain according to claim 18, said step of constructing a BYE message includes encapsulating an ISUP REL call release message from PSTN in said BYE message, And fill in the BYE message header according to the peer address of the established call and send it to the destination MSC server.
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