CN1695385A - 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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CN1695385A
CN1695385A CN03824772.0A CN03824772A CN1695385A CN 1695385 A CN1695385 A CN 1695385A CN 03824772 A CN03824772 A CN 03824772A CN 1695385 A CN1695385 A CN 1695385A
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message
sip
msc server
called
calling
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CN1281071C (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 invention provides a communication method for calling on the circuit switched domain of core networks of GSM/WCDMA. The method sets up a call signaling and communicates between (G)MSCs or (G)MSC Servers through SIP/SIP-T protocol, which solves the problem of communication between the core networks of WCDMA and fixed NGN, cama2000 in ALL IP network. According to the invention, all servers use unite SIP/SIP-T signaling, and terminal to terminal route takes the place of former hop by hop route by the route solution, such as, ENUM, route server, etc, to make hierarchical network into planar network, which reduces the network architecture and takes the advantage of IP network.

Description

A communication method for calling on the circuit switched domain of core networks of GSM/WCDMA
The communication means technical field called in GSM/WCDMA core net circuit domains
The present invention relates to a kind of communication technical field, and in particular to a kind of communication means called in GSM/WCDMA core net circuit domains.
Background technology
The main parallel circuit CS domains of WCDMA core nets and packet ps domain, CS domains provide voice, fax and circuit type data service, and ps domain provides Packet data service.WCDMA standards have tri- versions of R99, R4, R5 at present, and later release is formulated.
In terms of the network structure of WCDMA CS domains, R4 and R99 have large change.R99 core nets
CS domains are by MSC, GMSC, and the entity composition such as HLR, network architecture and GSM network are basically identical, based on TDM carryings and call signaling TUP/ISUP between MSC.Fig. 1 depicts existing 3GPP R4BICSCN network structures.R4 specifications propose that BICSCN (Bearer Independent Ci rcui t Swi tching Core Network) f was both read, i.e. the CS domain unrelated with ^ ^ loads, mainly by MSC server（MSC Server), GMSC servers（GMSC Server), the entity such as MGW, HLR composition,（G) used between MSC server and many kinds of carryings of TDM/ATM/IP are supported between call signaling BICC, MGW.（G the protocol integrated test system MGW of H. 248 after) MSC server is extended by 3GPP.
BICC (independent call of delivering letters control Bearer Independent Ca l l Control) agreement conduct that 3GPP R4 selections ITU-T is formulated（G) call signaling between MSC server, mainly BICC develops on the basis of ISUP, inherits the design philosophy of most of traditional signaling message, supports the MGW various carryings of TDM/ATM (AAL1, AAL2)/IP.In view of R4 CS domains net Network framework and current fixed network NGN, and 3GPP2 (cdma2000 standardization bodies）LMSD (Legency MS Domain, traditional mobile terminal domain）Network architecture is consistent, i.e., the Server+MGW structures being all separated using control and carrying.Most producers and operator are used as the call control signalling between soft switch Sof tswi tch to fixed network NGN using SIP/SIP-T at present, select SIP/SIP-T as the call control signalling between MSCe in 3GPP2 ALL IP specifications, MSCe functions are similar with the MSC server in WCDMA.SIP (Ses s ion Ini t iat ion Protocol, Session initiation Protocol）It is by IETF (Interne engineering task forces）The IP phone signaling protocol of proposition.As its name implies, SIP is used to initiate session, and it can control foundation and the termination of the Multimedia session that multiple participants participate in, and be adapted dynamically and change session attribute, such as session bandwidth requirement, the medium type transmitted（Voice, video and data etc.）, media code/decode format, to support of multicast and unicast etc..
SIP has taken into full account the exaptation to other agreements in design.It supports many kinds of address descriptors and addressing, including：User name@host addresses, called number@3 gateway address and such as Tel:Description of the so common telephone numbers of E. 164 of 010-62281234 etc..So, SIP callers are according to called address, it is possible to identify it is called whether online in black phone, then by the way that a gateway being connected with black phone net is to called initiation and sets up calling.
One of SIP advantages are subscriber location function.The function that SIP is registered containing oriented registrar in itself, can also strengthen its positioning function using the location-server of the offers such as other location-servers such as DNS, LDAP.
SIP-T is a kind of SIP application, encapsulates ISUP information units in SIP payload section or has translated ISUP information units, while employing the calling control flow of Session Initiation Protocol to simplify ISUP control signalings. Because various criterion tissue uses different agreement, the difficulty that is interconnected between heterogeneous networks will be brought to the following ALL IP stages.
On the other hand, the protocol stack for the IP carrying BICC signalings that 3GPP is defined is BICC/STCP/ IP/L2/L1, STCP links are equivalent to traditional SS7 links, usually static link, BICC signalings and TUP, ISUP signaling are route paragraph by paragraph using identical under which, rather than routing mode end to end.Now, radio core network key-course keeps hierarchy, that is, needs TMSC servers to complete toll route function.This routing mode and network structure be able to should more be optimized in IP network.
The content of the invention
It is an object of the invention to provide the communication means called in a kind of achievable GSM/WCDMA communication systems, for overcoming the shortcomings of to interconnect between above-mentioned different system.
The purpose of the present invention is realized by following method, a kind of to realize the communication means called in GSM/WCDMA communication systems, and described gsm communication system includes（G) MSC, BSC, HLR, VLR, UE, the WCDMA communication system include（G) MSC server, MGW, HLR, VLR, RNC, UE, the method comprising the steps of：（G) between MSC or（G) set up call signaling using SIP/SIP- T agreements between MSC server and communicate with each other.
Further, this method also includes being carried with IP network between MGW,（G) MSC server carries out Message Processing using the protocol integrated test system MGW of H. 248.
Specific described method at least includes one of following calling procedure：
Calling；Called calling；The calling release that UE is initiated；The calling release that network side is initiated.
In addition, this method also includes the calling procedure for setting up UE to UE in mobile network. Specifically, the calling process is made up of following steps：
UE initiates call request；
MSC server respond request simultaneously constructs SIP-T INVITE message templates, and INVITE message is sent into next hop address；GMSC servers receive the INVITE message from MSC server, and by back transfer INFO message to MSC server to set up the loading end service media stream on MG1 on terminal T2 and MG2 between terminal T3；
MSC server returns to SIP-T AC message to GMSC servers；Calling procedure carries foundation and finished end to end.
Further, the step of calling process, also occupies the address message modification ISUP IAM source templates in SIP-T message headers including GMSC servers, selection office to and idle circuit, and final IAM message is sent to PSTN by SIGTRN/SG or SS7;
GMSC servers receive ACM Address Complete Messages from PSTN, the message are encapsulated into S IP-T 180 ringing indication messages, and 180 message is reversely sent into MSC server；
MSC server is received after the message, and the ACM information of encapsulation is parsed from 180 message, notifies calling UE called subscriber to have been turned on；
GMSC servers receive ANM response messages from PSTN, and 200 0K that the message is encapsulated into SIP-T indicate message, and the 200 0K message is reversely sent into MSC business devices；
MSC server is received after the message, and the ANM information of encapsulation is parsed from 200 message, notifies calling UE called subscriber to reply.
Preferably, the calling process, which also includes MSC server, the step of domain of dependence internally fills the IAM message for turning to ISUP is called in the caller Setup call setup messages from Iu interfaces. It is best, the calling process is additionally included in after the INVITE message that GMSC servers receive MSC server, it was found that wherein include ISUP IAM encapsulation, then the step of directly using the message content as the template to be sent to PSTN ISUP IAM message.
Specifically, the step of construction INVITE message template includes filling in sip address domain according to called number, the MG1 SDP message for relaying lateral terminal T1 is filled in into SIP INVITE source templates.
In addition, described called calling procedure comprises the following steps：
GMSC servers receive the ISUP IAM message from PSTN；
GMSC server constructs SIP-T INVITE message templates, and before getting roaming number as address information to sending S IP-T INVITE messages；
MSC server reversely passes SIP-T INFO messages back GMSC servers, the loading end service media stream between terminal T3 to set up different MG2 terminal T2 and MG1
GMSC servers return to SIP-T ACK messages to MSC server；Called flow carries foundation and finished end to end.
Further, the called calling procedure is further comprising the steps of
MSC server receives Aler t ing called terminal ringing message from Iu interfaces, construction correspondence ISUP ACM message, and the message is encapsulated into SIP-T 180 ringing indication messages, and the 18G message is reversely sent into GMSC servers；
GMSC servers are received after the message of SIP-T 180 from MSC server, the ACM information of encapsulation is parsed from the message, using the message as template, occupy 180 message header informations and carry out necessity ^ " after changing, final ACM message is sent to PSTN by SIGTRAN/SG or SS7; MSC server receives connection from Iu interfaces（Connect) response message, according to message constructing ISUP answer message, and 200 0K that the message is encapsulated into SIP- T indicate message, and the 200 0K message is reversely sent into GMSC servers；
GMSC servers are received after the message of SIP- T 200 from MSC server, the A that encapsulation is parsed from the message draws information, using the message as template, carried out according to 200 message header informations after necessary modification, the final beautiful message of A is sent to PSTN by SIGTRAN/SG or SS7.
Preferably, after PSTN ISUP IAM message is received, GMSC servers control MG2 to initiate routing inquiry to HLR after distributing ISUP circuit terminals T1 and context C1 resources, analysis number attribute by H. 248/MGCP orders.
Specifically, the SIP-T INVITE message templates of described construction, wherein the SDP message comprising terminal T2, and Incoming side IAM message is encapsulated into message body portion.
In addition, the calling release process that described UE is initiated comprises the following steps：
MSC server receives taking out stitches from UE（Di sconnec t) order；
MSC server constructs SIP-T BYE message；
GMSC servers, which are received, to be filled in ISUP REL message and the message is sent into PSTN by SIGTRAN/SG or SS7 after the BYE message from MSC server;
MSC server is received after the 200 0K message from GMSC servers, and the terminal T2 of R4 core net trunk sides is discharged by issuing H. 248/MGCP order requests MG1;
MSC server initiates release signaling flow to discharge air interface and terrestrial links resource to Iu, receives after Iu release responses, the terminal Tl of wireless access net side is discharged by issuing H. 248/MGCP order requests MG1. Specifically, the step of construction S IP-T BYE message includes encapsulating I SUP REL call release messages in the message, and BYE message headers are filled according to the opposite end address set up and purpose GMSC servers are sent to.
In addition, the process that described network side initiates calling release comprises the following steps：
GMSC servers receive the REL from PSTN and taken out stitches order；
GMSC server constructs S IP- T BYE message；
MSC server fills in taking out stitches for Iu interfaces after receiving the BYE message from GMSC servers（Di sconnec t) message, and the message is sent to UE;
MSC server discharges the terminal T2 of R4 core net trunk sides by issuing H. 248/MGCP order requests MG1, obtains MG1 and responds 200 0 message that backward GMSC servers return to S IP-T, wherein encapsulating ISUP RLC message；GMSC servers are parsed after the ISUP RLC message wherein encapsulated after the 200 0K message from MSC server are received, and the terminal T3 of R4 core net trunk sides is discharged by issuing H. 248/MGCP order requests MG1;
MSC server initiates release signaling flow to discharge air interface and terrestrial links resource then to Iu, receives after Iu release responses, the terminal T1 of wireless access net side is discharged by issuing H. 248/MGCP order requests MG1;
Specifically, the step of described construction BYE message includes, the I SUP REL call release messages from PSTN are encapsulated in the BYE message, and BYE message headers are filled in ' end address according to the calling set up and purpose MSC server is sent to.
In addition, in the mobile network UE to UE across office calling, equivalent to UE callers and the merging of called flow, and delete GMSC server entities and its corresponding S IP- T/ISUP intercommunication translation functions. Further, described method is also included by using ENUM or routing server solution, is replaced, using the piecewise routing mode in Bearer Independent Call Control Protocol, hierarchical network being changed into planar network with end-to-end route.
Preferably, this method, which is additionally included in, increases the Codec message that extension field is used to transmit mobile calling and called terminal or WMG support in SIP-T INVITE and INFO message, to support TrFO with outer codec negotiation ability.
Due to the present invention by wireless core network MSC server and（G SIP/SIP-T call signalings) are introduced between MSC server, are solved well in ALL IP networks, the intercommunication of WCDMA core nets and fixed NGN, cdma2000 core net.At this moment unified SIP/SIP-T signalings are used between all Server.
After SIP/SIP- T signalings, other such as ENUM, routing server routing solution can be passed through, original piecewise routing mode is replaced with end-to-end route, hierarchical network is changed into planar network, it will help simplifies network structure and plays IP network advantage.
Brief description of the drawings
Fig. 1 is existing 3GPP R4BICSCN network structures；
Fig. 2 is the CS domains network structure based on SIP- T of embodiment of the present invention；Fig. 3 is the calling of embodiment of the present invention（The calling that UE is initiated）Flow；Fig. 4 is the called call flow of embodiment of the present invention（The calling that network side is initiated）；Fig. 5 is the calling release flow of the UE initiations of embodiment of the present invention；
Fig. 6 is the calling release flow of the network side initiation of embodiment of the present invention.
Embodiment
In order to which those skilled in the art is better understood from the present invention, this is described below in conjunction with the accompanying drawings The embodiment of invention.
General WCDMA communication system includes（G) the device such as MSC server, MGW, HLR, VLR, RNC, UE.
Fig. 2 depicts the CS domains network structure based on SIP-T of embodiment of the present invention, CS domains network architecture is mainly made up of MSC server, GMSC servers, MGW, BSS in WCDMA communication system, in view of situation about interconnecting later, the present invention propose in MSC servers and（G SIP/SIP-T call signaling) is used between MSC server, and the control of other parts still follows R4 specifications, i.e., MSC server/GMSC servers use IP available between H. 248 protocol integrated test system MGW, GW to carry.
With reference to call flow, the present invention will be further described, is the calling of embodiment of the present invention as shown in Figure 3（The calling that UE is initiated）Flow, described calling flow comprises the following steps：
First, in step 1, UE initiates the call setup to MSC server（Setup), MSC servers return to calling procedure（Cal l proceeding), and indicate that the newly-increased distribution R4 core nets of MG1 relay lateral terminal by H. 248/MGCP（) and context T2（C1) resource.Then, in step 2, MSC server will be set up in (Setup) message from the calling of Iu interfaces and call the domain of dependence（Calling number, called number, user property, bearing capacity, business instruction etc.）Internally be converted to ISUP IAM message.
In step 3, MSC server constructs SIP- T INVITE message templates, sip address domain is filled according to called number, the MG1 SDP informations for relaying lateral terminal T1 are filled in into INVITE message body, and the ISUP IAM message for constructing step 2 inserts SIP INVITE message templates as message body extension, and INVITE is sent into next hop address. In step 4,（G) MSC server is received after the INVITE message from MSC server（It may be redirected by some proxy forwardings or redi rect）, find wherein include I SUP IAM encapsulation, then it is direct using the message content as the ISUP IAM message to be sent to PSTN template.
In steps of 5, GMSC servers indicate the newly-increased distribution R4 core-network side terminals of MG2 by H. 248/MGCP agreements（) and context T3（C3) resource, while carrying distance terminal T2 SDP information in the order.
In step 6, terminal T3 SDP information is passed back to MSC server by GMSC servers backward by INFO message, MSC server changes the attribute of terminal T2 on MG1 according to the information, its distance terminal T3 SDP information is handed down between terminal T2, such MG1 Τ 2 and MG2 Τ 3 and just establishes loading end service media stream.
In step 7, MSC server further adds the terminal Tl of wireless access network side by H. 248/MGCP protocol requirements MG1 in C1 contexts, then issues RAB assignments to distribute air interface and Iu interface bearings face resource（Terminal T1 bearing association information is carried in the message）.Step 7 in time can with step 4,5, it is 6 parallel.
In step 8, address information modification ISUP IAM source template of the GMSC servers in SIP- T message headers, selection office to and idle circuit, and final IAM message is sent to PSTN by SIGTRAN/SG or SS7;
In step 9, GMSC servers receive ACM Address Complete Messages from PSTN, the message are encapsulated into SIP-T 180 ringing indication messages, and 180 message is reversely sent into MSC servers；
In step 10, MSC server is received after the message, and envelope is parsed from 180 message The ACM information of dress, by the Alert ing message that related protocol domain information reverse conversion is Iu interfaces, notifies calling UE called subscriber to have been turned on；
In a step 11, GMSC servers receive A gangster's response messages from PSTN, and 200 0K that the message is encapsulated into SIP-T indicate message, and the 200 0K message is reversely sent into SC servers；
In step 12, MSC server is received after the message, the awake information of A of encapsulation is parsed from 200 message, by the connection message that related protocol domain information reverse conversion is Iu interfaces, calling UE called subscriber is notified to reply, simultaneously the rear unidirectional connection between T1 and T2 is revised as being bi-directionally connected by H. 248/MGCP protocol commands MG1, most backward GMSC servers return to SIP-T ACK messages；Calling procedure carries foundation and finished end to end.
It is the called call flow of embodiment of the present invention shown in Fig. 4（The calling that network side is initiated）, described called call flow comprises the following steps：
First, in step 11, GMSC servers receive the ISUP IAM message from PSTN, control MG2 to distribute ISUP circuit terminals (T1) and context by H. 248/MGCP orders（C1 routing inquiry is initiated after) resource, analysis number attribute to HLR；
Then, in step 12, GMSC servers are taking route simultaneously, by H. 248/MGCP orders MG2 can be controlled to distribute R4 core-network sides terminal (T2) resource in context C1；
After again, in step 13, GMSC server constructs SIP-T INVITE message templates, wherein including terminal T2 SDP information, and Incoming side IAM message is encapsulated into message body portion, and before getting roaming number as address information to sending SIP-T INVITE messages；At step 14, MSC server receives the INVITE message from GMSC servers Afterwards（It may be redirected by some proxy forwardings or redi rect）, find wherein to include I SUP IAM encapsulation, parse called number information therein（Roaming number）, inquire about after VLR and initiate paging and the authentication process of called UE；
Then, according to the result of previous step, in step 15, MSC server is after called paging and authentication pass through, according to the calling domain of dependence in the IAM message encapsulated in INVITE（Calling number, called number, user property, bearing capacity, business instruction etc.）The Setup message that Iu interfaces are sent to called UE is internally converted to, and Ca l l Conf i rmed responses are received from called UE；
In step 16, MSC server controls MG1 to distribute R4 core-network side terminals by H. 248/MGCP orders（) and context T3（C2) resource, wherein carry the SDP information that distance terminal T2 is contained in INVITE, then T3 local SDP information is reversely passed back GMSC servers by SIP-T INFO messages, GMSC servers change the attribute of terminal T2 on MG2 according to the information, its distance terminal T3 SDP information is handed down between terminal T2, such MG2 Τ 2 and MG1 Τ 3 and just establishes loading end service media stream；The step can be parallel Yu Bu Sudden 15；
In step 17, MSC server further adds the terminal Τ 4 of wireless access network side by H. 248/MGCP protocol requirements MG1 in C2 contexts, then issues RAB assignments to distribute air interface and Iu interface bearings face resource（Terminal T4 bearing association information is carried in the message）.
In step 18, MSC server receives the er t i ng called terminal ringing message of A 1 from Iu interfaces, construction correspondence ISUP ACM message, and the message is encapsulated into SIP-T 180 ringing indication messages, and 180 message is reversely sent to GMSC servers； In step 19, MSC server is received after Iu interface Alerting message, by H.248/ GCP protocol integrated test systems MG1 on the terminal T3 of R4 core-network sides after to play in-band ringback tone；
In step 20, GMSC servers are received after the message of SIP-T 180 from MSC server, the ACM information of encapsulation is parsed from the message, using the message as template, carried out according to 180 message header informations after necessary modification, final ACM message is sent to PSTN by SIGTRAN/SG or SS7;
In step 21, MSC server receives from Iu interfaces and connection replys message, according to message constructing ISUP answer message, and the 2000K that the message is encapsulated into SIP- T indicates message, and the 200 0K message is reversely sent into GMSC servers；
In step 22, MSC servers are received after Iu interface connection messages, to playing RBT after by H.248/MGCP protocol integrated test system MG1 on the terminal T3 of R4 core-network sides stopping, and wireless access lateral terminal T4 is revised as being bi-directionally connected with T3；
In step 23, GMSC servers are received after the message of SIP-T 200 from MSC server, the A that encapsulation is parsed from the message draws information, using the message as template, it is just blunt to be carried out according to 200 message header informations after necessary modification, the awake message of final A is sent to PSTN by SIGTRAN/SG or SS7, while returning to SIP-T ACK messages to GMSC servers；Called flow carries foundation and finished end to end.
It is the calling release flow that the UE of embodiment of the present invention is initiated shown in Fig. 5, described release flow comprises the following steps：
In step 31, MSC server receives the order Disconnect that takes out stitches from UE, and release is sent to UE（Release) its Dry of order request puts call control resource, and is received from UE The response completed to control resource release.
In the step 32, MSC server construction SIP-T BYE message, encapsulates ISUP REL call release messages, and fill in BYE message headers according to the opposite end address for having set up calling and be sent to purpose business device wherein；
In step 33, GMSC servers are received after the BYE message from MSC server, it was found that the ISUP REL encapsulation wherein included, parses the information such as release cause therein, ISUP REL message is filled in accordingly and the message is sent into PSTN by S IGTRAN/SG or SS7;In step 34, GMSC servers discharge the terminal T3 of R4 core net trunk sides by issuing H. 248/MGCP order requests MG2, obtain MG2 and respond the 200 0K message that backward MSC server returns to SIP- T, wherein encapsulating ISUP RLC message；GMSC servers discharge the terminal T4 of PSTN side by issuing H. 248/MGCP order requests MG2 after the ISUP RLC message from PSTN is received;
In step 35, MSC server is received after the 200 0K message from GMSC servers, and the terminal T2 of R4 core net trunk sides is discharged by issuing H. 248/MGCP order requests MG1;In step 36, MSC server initiates release signaling flow to discharge air interface and terrestrial links resource to Iu, receives after Iu release responses, the terminal Tl of wireless access net side is discharged by issuing H. 248/MGCP order requests MG1.
It is the calling release flow that the network side of embodiment of the present invention is initiated shown in Fig. 6, described release flow includes：
In step 41, GMSC servers receive the REL from PSTN and taken out stitches order, by issuing the terminal T3 that H. 248/MGCP order requests MG2 discharges terminal T4 and the R4 core-network side of PSTN side; In step 42, GMSC server constructs SIP- T BYE message encapsulates the ISUP REL call release messages from PSTN, and fill in BYE message headers according to the opposite end address for having set up calling and be sent to purpose MSC server wherein；
At step 43, MSC server is received after the BYE message from GMSC servers, is found the I SUP REL encapsulation wherein included, is parsed the information such as release cause therein, the clear message of Iu interfaces is filled in accordingly（Di s connec t), and the message is sent to UE;
In step 44, MSC server discharges the terminal Τ 2 of R4 core net trunk sides by issuing H. 248/MGCP order requests MG1, obtain MG1 and respond 200 0 message that backward GMSC servers return to S IP-T, wherein encapsulating ISUP RLC message；GMSC servers are parsed after the ISUP RLC message wherein encapsulated after the 200 0K message from MSC server are received, and the terminal T3 of R4 core net trunk sides is discharged by issuing H. 248/MGCP order requests MG1;
In step 45, MSC server receives the release from UE（Re l ea se) request after call release related resource, and to UE return discharge complete response；
In step 46, MSC server initiates release signaling flow to discharge air interface and terrestrial links resource then to Iu, receives after Iu release responses, the terminal T1 of wireless access net side is discharged by issuing H. 248/MGCP order requests MG1;Bu Sudden 45,46 in time can be parallel with step 44.
Call flow example is described above to describe respectively under UE to PSTN and PSTN to UE call cases, S IP-T flows between end office's MSC server and GMSC servers, and for across office calling in UE to UE mobile network, equivalent to UE callers and the merging of called flow, and delete GMSC server entities and its corresponding S IP_TnSUP intercommunication translation functions）, This is not repeated.
In order to realize above-mentioned calling procedure,（G) interface between MSC server and MG needs to do appropriate extension on H. 248/MGCP protocol basis；
In addition, to support TrFO with outer codec negotiation ability, need to increase the Codec information that extension field is used to transmit mobile calling and called terminal or WMG support in SIP- T INVITE and INFO message, such as ware, FR, EFR, WB- AMR;
Because the network architecture for controlling and carrying separation is equally applicable to GSM network or WCDMA networks.The present invention in GSM the or WCDMA wireless core networks of Voice over IP, introduce SIP/SIP-T signalings as MSC server and（G) the call control signalling between MSC server.Due to（G) MSC server and MGW belong to logical functional entity, in realization also can by both on same physical entity realize, similar to provide ip voice bearing interface MSC and (G) MSC, so this patent be included in MSC with（G the situation of SIP/SIP- T signalings) is used between MSC.
Above-mentioned flow describes the normal flow of the basic calling and called of the present invention, application and flow for Session Initiation Protocol in each supplementary service, IN service and abnormal flow can refer to above-mentioned basic procedure realization principle and thinking, and 3GPP the (call flows of TS 23. 218）, IETF draf t-ietf-s ipping-i sup-06 (ISUP and SIP Mapping specifications）With draf t-ietf-s ipping-s ipt-04 (SIP-T specifications）.
Although depicting the present invention by embodiment, it will be recognized by those skilled in the art that not departing from the connotation of the present invention, those skilled in the art can make improvement and change.Therefore claim should include these improvement and father changes.

Claims (18)

  1. Claim
    1st, a kind of communication means called in GSM/WCDMA core net circuit domains, the gsm communication system includes（G) MSC, BSC, HLR, VLR, UE, the WCDMA communication system include（G) MSC servers（（G) MSC Server), MGW, HLR, VLR, RNC, UE, the method comprising the steps of：（G) between MSC or（G) set up call signaling using SIP/SIP-T agreements between MSC server and communicate with each other.
    Carried between the 2, communication means according to claim 1 called in GSM/WCDMA core net circuit domains, the MGW with IP network,（G) MSC server carries out Message Processing using the protocol integrated test system MGW of H. 248.
    3rd, the communication means according to claim 1 called in GSM/WCDMA core net circuit domains, described method is also included by using EN circles or routing server solution, replaced, using piecewise routing mode during Bearer Independent Call Control Protocol, hierarchical network being changed into planar network with end-to-end route.
    4th, the communication means according to claim 1 called in GSM/WCDMA core net circuit domains, being additionally included in increases the Codec message that extension field is used to transmit mobile calling and called terminal or WMG support in SIP-T INVITE and INFO message, to support TrFO with outer codec negotiation ability.
    5th, the communication means called in GSM/WCDMA core net circuit domains according to one of the claims, at least including one of following calling procedure：
    Calling（The calling that UE is initiated）；
    Called calling（The calling that network side is initiated）； The calling release that UE is initiated；
    The calling release that network side is initiated.
    6th, the communication means according to claim 5 called in GSM/WCDMA core net circuit domains, in addition to set up the calling procedure of UE to UE in mobile network.
    7th, UE to UE across office calling, equivalent to UE callers and the merging of called flow, and is deleted in the communication means according to claim 6 that call treatment is carried out in GSM/WCDMA core net circuit domains, the mobile network（G) MSC server entities and its corresponding SIP-T/ ISUP intercommunication translation functions.
    8th, the communication means according to claim 7 called in GSM/WCDMA core net circuit domains, the calling process is made up of following steps：
    UE initiates call request；
    MSC server respond request simultaneously constructs SIP-T INVITE messages, and INVITE message is sent into next hop address；
    GMSC servers receive the INVITE message from MSC server, and by back transfer INFO message to MSC server to set up the loading end service media stream on MG1 on terminal T2 and MG2 between terminal T3；
    MSC server returns to SIP- T AC message to GMSC servers；Calling procedure carries foundation and finished end to end.
    9. the communication means according to claim 8 that call treatment is carried out in GSM/WCDMA core net circuit domains, in addition to step
    Address message modification ISUP I AM source template of the GMSC servers in SIP- T message headers, selection office to and idle circuit, and by final IAM message by SIGTRN/SG or SS7 is sent to PSTN;
    GMSC servers receive ACM Address Complete Messages from PSTN, the message are encapsulated into SIP-T 180 ringing indication messages, and 180 message is reversely sent into MSC server；
    MSC server is received after the message, and the ACM information of encapsulation is parsed from 180 message, notifies calling UE called subscriber to have been turned on；
    GMSC servers receive ANM response messages from PSTN, and 200 0K that the message is encapsulated into SIP-T indicate message, and the 200 0K message is reversely sent into MSC server;
    MSC server is received after the message, and the A that encapsulation is parsed from 200 message draws information, notifies calling UE called subscriber to reply.
    10th, the communication means according to claim 9 called in GSM/WCDMA core net circuit domains, the calling process, which also includes MSC server, the step of domain of dependence internally fills the IAM message for turning to ISUP is called in the caller Setup call setup messages from Iu interfaces.
    11st, the communication means according to claim 9 called in GSM/WCDMA core net circuit domains, the calling process is additionally included in after the INVITE message that GMSC servers receive MSC server, it was found that wherein include ISUP IAM encapsulation, then the step of directly using the message content as the template to be sent to PSTN ISUP IAM message.
    12nd, the communication means according to claim 9 called in GSM/WCDMA core net circuit domains, the step of construction INVITE message template, fills in sip address domain including just blunt according to called number, and the MG1 SDP message for relaying lateral terminal T1 is filled in into SIP INVITE source templates.
    13rd, it is according to claim 5 to be exhaled in GSM/WCDMA core net circuit domains The communication means cried, described called calling procedure comprises the following steps：
    GMSC servers receive the ISUP IAM message from PSTN;
    GMSC server constructs SIP- T INVITE message templates, and before getting roaming number as address information to sending SIP-T INVITE messages；
    MSC server reversely passes SIP-T INFO messages back GMSC servers, the loading end service media stream between terminal T3 to set up different MG2 terminal T2 and MG1
    GMSC servers return to SIP- T ACK messages to MSC server；Called flow carries foundation and finished end to end.
    14. the communication means according to claim 13 called in GSM/WCDMA core net circuit domains, further comprising the steps of
    SC servers receive Alert ing called terminal ringing message from Iu interfaces, construction correspondence I SUP ACM message, and the message is encapsulated into S I P- T 180 ringing indication messages, and 180 message is reversely sent into GMSC servers；
    GMSC servers are received after the message of SIP- T 180 from MSC server, the ACM information of encapsulation is parsed from the message, using the message as template, it is just blunt to carry out that after necessity ^ i change, final ACM message is sent into PSTN by SIGTRAN/SG or SS7 according to 180 message header informations;
    MSC server receives connection from Iu interfaces（Connect) response message, according to message constructing ISUP answer message, and 200 0K that the message is encapsulated into SIP-T indicate message, and 200 0 message is reversely sent into GMSC servers；
    GMSC servers are received after the message of SIP- T 200 from MSC server, and the awake information of A of encapsulation is parsed from the message, using the message as template, ~ according to 200 message header informations Carry out after necessary modification, the final beautiful message of A is sent to PSTN by S IGTRAN/SG or SS7.
    15th, the communication means according to claim 14 called in GSM/WCDMA core net circuit domains, the S IP- T INVITE message templates of described construction, terminal T2 SDP message is wherein included, and Incoming side IAM message is encapsulated into message body portion.
    16th, the communication means called in GSM/WCDMA core net circuit domains described in claim 5 is occupied, the calling release process that described UE is initiated comprises the following steps：
    MSC server receives taking out stitches from UE（Di sconnec t) order；
    MSC server constructs S IP-T BYE message；
    GMSC servers, which are received, to be filled in ISUP REL message and the message is sent into PSTN by S IGTRAN/SG or SS7 after the BYE message from MSC server;
    MSC server is received after the 200 0K message from GMSC servers, and the terminal T2 of R4 core net trunk sides is discharged by issuing H. 248/MGCP order requests MG1;
    MSC server initiates release signaling flow to discharge air interface and terrestrial links resource to Iu, receives after Iu release responses, the terminal Tl of wireless access net side is discharged by issuing H. 248/MGCP order requests MG1.
    17th, the communication means according to claim 16 that call treatment is carried out in GSM/WCDMA core net circuit domains, the step of construction SIP-T BYE message, includes encapsulating I SUP REL call release messages in the message, and the opposite end address that just blunt evidence has been set up fills in BYE message headers and is sent to purpose GMSC servers.
    18th, the communication means called in GSM/WCDMA core net circuit domains described in claim 5 is just occupied, the process that described network side initiates calling release comprises the following steps： GMSC servers receive the REL from PSTN and taken out stitches order；
    GMSC server constructs SIP- T BYE message；
    MSC server fills in taking out stitches for Iu interfaces after receiving the BYE message from GMSC servers（Di s connect) message, and the message is sent to UE;
    MSC server discharges the terminal T2 of R4 core net trunk sides by issuing H. 248/MGCP order requests MG1, obtains MG1 and responds the 200 0K message that backward GMSC servers return to SIP- T, wherein encapsulating ISUP RLC message；GMSC servers are parsed after the ISUP RLC message wherein encapsulated after 200 0 message from MSC server are received, and the terminal T3 of R4 core net trunk sides is discharged by issuing H. 248/MGCP order requests MG1;
    MSC server initiates release signaling flow to discharge air interface and terrestrial links resource then to Iu, receives after Iu release responses, the terminal T 1 of wireless access net side is discharged by issuing H. 248/MGCP order requests MG1；
    19th, the communication means according to claim 18 called in GSM/WCDMA core net circuit domains, the step of described construction BYE message, includes, the ISUP REL call release messages from PSTN are encapsulated in the BYE message, and>BYE message headers are filled according to the opposite end address for the calling set up and are sent to purpose MSC server.
CN03824772.0A 2002-10-28 2003-09-17 A communication method for calling on the circuit switched domain of core networks of GSM/WCDMA Expired - Lifetime CN1281071C (en)

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CN101467420B (en) * 2006-06-09 2013-05-01 Sk电信有限公社 Method for providing early-media service based on session initiation protocol

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CN100396112C (en) * 2004-09-29 2008-06-18 华为技术有限公司 Method for realizing mobile data service unification route in communication system
CN100403795C (en) * 2004-12-31 2008-07-16 华为技术有限公司 Method for realizing NGN network and mobile network video interconnection
CN103108298B (en) * 2011-11-10 2016-03-23 北京信威通信技术股份有限公司 The implementation method of the whole network calling in a kind of mobile communication system

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CN101467420B (en) * 2006-06-09 2013-05-01 Sk电信有限公社 Method for providing early-media service based on session initiation protocol

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