CN101370171A

CN101370171A - Method, system and device for implementing communication call and release

Info

Publication number: CN101370171A
Application number: CNA2007101414589A
Authority: CN
Inventors: 张戬; 段小琴; 吴晓波; 李庆禹
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2007-08-19
Filing date: 2007-08-19
Publication date: 2009-02-18
Anticipated expiration: 2027-08-19
Also published as: WO2009024072A1; CN101370171B

Abstract

The invention discloses a method of realizing communication calling and releasing, a system and a device. The calling method comprises: receiving calling messages from a terminal; controlling the establishment of media interface association between an evolution media gateway EMGW and the terminal according to the calling messages; controlling the establishment of load between the terminal and a packet domain gateway, wherein, the load is used for transmitting the analog circuit domain service data of the terminal in the packet domain. When the terminal is accessed to a PS domain, a CS domain in the PS domain or an opposite end in a fixed network can be called so that a UMTS evolution network can be compatible backwards with the existing CS domain, most of investments of the operators of the existing voice calling are on the calling of the CS domain, so as to protect the investments of the existing operators.

Description

Realize method and system, the device of communication call and release

Technical field

The present invention relates to the calling field, relate in particular to method and system, the device of realizing communication call and release.

Background technology

Development along with mobile communication technology, third generation partner program (The 3rd GenerationPartnership Project, 3GPP) business datum that need handle of system increases rapidly, for agreement (the Internet Protocol that strengthens interconnecting between the quick network that increases of 3GPP system handles, IP) ability of data service, need to strengthen group technology in the intrasystem application of 3GPP, promptly the group technology in the 3GPP system is carried out evolution, the 3GPP system in the evolution process is called evolvement network.

Evolvement network is a important indicator in the evolution process for the backwards compatibility of existing network; in order to protect the investment of existing operator; utilize the entity in available circuit territory to a greater extent; at present; a kind of grouping (Packet Switching in evolvement network has been proposed; PS) bearer circuit (CircuitSwitching in the territory; CS) data, the scheme of signaling; along with the proposition of this scheme, how to be implemented in the terminal call of analog circuit domain on the PS territory and to become the problem that urgent need will solve from the network side call release.

Summary of the invention

The embodiment of the invention provides method and system, the device of realizing communication call and release, makes user in the PS territory can call out the user in any CS territory or the fixed network, thereby improves the backwards compatibility of evolvement network, the investment of the existing operator of protection.

The embodiment of the invention provides a kind of method that realizes communication call, and this method comprises:

Receive the message related to calls of self terminal;

According to described message related to calls, it is related with the medium face between the described terminal that evolution media gateway EMGW is set up in control;

According to described message related to calls, the carrying between described terminal and the packet domain gateway is set up in control, and described carrying is used for transmitting the analog circuit domain business data of described terminal in packet domain.

The embodiment of the invention also provides a kind of method for releasing of realizing communication call, and this method comprises:

Behind the session release message of reception from the opposite end, discharge the message of session to terminal transtation mission circuit territory;

According to the message of described release session, it is related with the medium face between the terminal to finish EMGW;

According to the message of described release session, discharge the carrying between packet domain gateway and the terminal.

The embodiment of the invention also provides a kind of subscriber equipment, comprising:

Transmission unit is used for carrying out the mutual of message with packet domain chain of command entity;

Encapsulation unit, send to described transmission unit after being used for signaling is encapsulated in the network non-access layer information, carry indication information in the described network non-access layer information, described indication information is used for described packet domain chain of command entity and judges whether described network non-access layer information is sent to the network side controlling call entity;

Decapsulation unit, be used for from the message deblocking from described transmission unit take on corresponding signaling and terminal is provided and described network side controlling call entity between the peer protocol layer entity of transportation level.

The embodiment of the invention also provides a kind of packet domain chain of command entity, comprising:

Receiving element is used to receive the message from subscriber equipment or network side controlling call entity;

Judging unit is used to judge whether message from subscriber equipment needs to network side controlling call entity transparent transmission, whether needs to the subscriber equipment transparent transmission from the message of network side controlling call entity; Then generate control command if desired;

Transmitting element is used for according to described control command, with described message from subscriber equipment to described network side controlling call entity transparent transmission, from the message of network side controlling call entity to described subscriber equipment transparent transmission.

The embodiment of the invention also provides a kind of network side controlling call entity, comprising:

Receiving element is used for towards packet domain and circuit domain the message in receiving circuit territory;

Control unit is used for the message according to described circuit domain, generates control command;

Transmitting element is used for issuing corresponding data or signaling according to described control command.

The embodiment of the invention also provides a kind of system that realizes communication call, comprising:

The network side controlling call entity is used for the message according to circuit domain, generates the control command towards packet domain and circuit domain;

EMGW is used for according to described control command, and foundation is related with the medium face between the terminal;

The packet domain gateway is used for according to described control command, the carrying between foundation and the terminal, and described carrying is used for transmitting the analog circuit domain business data of described terminal in packet domain.

The realization communication call that the embodiment of the invention provides and the method and system of release; device; after terminal (UE) inserts the PS territory; can in the PS territory, call out the opposite end in CS territory or the fixed network; make that the UMTS evolvement network can backward compatibility existing C S territory; the major part investment of the operator that existing voice is called out is all in the calling in CS territory; thereby can protect the investment of existing operator; at the audio call in CS territory in the process of the audio call transition in PS territory; the method of the calling that can realize compatible CS territory and PS territory is provided, makes the audio call of audio call to the PS territory in CS territory seamlessly transit.

Description of drawings

Fig. 1 is the network architecture A schematic diagram in the embodiment of the invention;

Fig. 2 is the network architecture B schematic diagram in the embodiment of the invention;

Fig. 3 is the network architecture C schematic diagram in the embodiment of the invention;

Fig. 4 realizes the flow chart of the method embodiment one of communication call for the present invention;

Fig. 5 realizes the flow chart of the method embodiment two of communication call for the present invention;

Fig. 6 realizes the flow chart of the method embodiment three of communication call for the present invention;

Fig. 7 realizes the flow chart of the method embodiment four of communication call for the present invention;

Fig. 8 realizes the flow chart of the method embodiment five of communication call for the present invention;

Fig. 9 realizes the flow chart of the method for releasing embodiment one of communication call for the present invention;

Figure 10 the present invention realizes the flow chart of the method for releasing embodiment two of communication call;

Figure 11 the present invention realizes the flow chart of the method for releasing embodiment three of communication call;

Figure 12 the present invention realizes the flow chart of the method for releasing embodiment four of communication call;

Figure 13 the present invention realizes the flow chart of the method for releasing embodiment five of communication call;

Figure 14 the present invention realizes the flow chart of the method for releasing embodiment six of communication call;

Figure 15 is the structural representation of subscriber equipment embodiment of the present invention;

Figure 16 is the structural representation of packet domain chain of command physical embodiment of the present invention;

Figure 17 is the structural representation of network side controlling call entity embodiment of the present invention;

Figure 18 realizes the structural representation of the system embodiment of communication call for the present invention.

Embodiment

Referring to Fig. 1, that shown in Figure 1 is the framework A of evolvement network, in framework A, the network side controlling call entity is set, calling is controlled, in following each embodiment, the network side controlling call entity can comprise the EMSC in the evolution system, EMSC can comprise (the Mobile-services Switching Centre of mobile switching centre in the CS territory, MSC) partial function, IP multimedia system (IPMultimedia Subsystem, IMS) multimedia gateway controlled function (Media Gateway ControlFunction in, the function of application server in partial function MGCF) and the PS territory (Application Serve), EMSC by with "Policy and Charging Rules Function (Policy and Charging Rules Function, PCRF) Rx interface between is controlled the carrying of setting up the PS territory, adopt logic interfacing to simulate the signaling of transmitting the CS territory between EMSC and the UE, EMGW comprises (the IP MultimediaMedia Gateway of IP multimedia media gateway among the IMS, IM-MGW) media gateway in function and the CS territory (Media Gateway, function MGW).

Referring to Fig. 2, that shown in Figure 3 is the framework B of evolvement network, the difference of framework B and framework A shown in Figure 1 is, packet domain chain of command entity is set to be transmitted the signaling of packet domain, in following each embodiment, packet domain chain of command entity can comprise MME, introduces the interface of similar Gs between MME and EMSC, this interface is used to transmit the signaling that calling is correlated with, and is used as transmission switching message use when switching after being.

Referring to Fig. 3, that shown in Figure 3 is the framework C of evolvement network, and framework C and framework A shown in Figure 1 are basic identical, just the interface of PCC useless system among the framework C.Direct outgoing interface between EMSC and the packet domain gateway entity is used for controlling and sets up the packet domain carrying that analog circuit domain is called out, and in following each embodiment, the packet domain gateway comprises PDN-GW.Under this framework, introduced the interface X between EMSC and PDN-GW, PDN-GW is used for accepting some chain of command instruction messages of EMSC with this interface.

More than in three kinds of frameworks, the network side controlling call entity can be the Different Logic entity that separates with EMGW, also can be same logic entity.

Embodiment one, and a kind of method that realizes communication call is applied in simulation CS territory calling in the PS territory.Under framework A shown in Figure 1, the UE in PS territory makes a call to the opposite end of CS territory or fixed network, in the present embodiment, realizes the method that call out in simulation CS territory, PS territory, realizes the main flow process of exhaling by IP connectivity.

UE be attached to evolvement network System Architecture Evolution (System Architecture Evolution, SAE) after, the packet domain of setting up relevant signalings such as simulation CS territory registration, calling is carried;

UE set up and EMSC between security association, and register to EMSC; For validity and the real-time that guarantees security relationship, EMSC/ customer location register (Visitor Location Register, VLR) will do the discrimination weight process of analog circuit domain to this UE in, after the authentication success, in EMSC/VLR, preserve the security association parameters of UE in circuit domain, this security association parameters can comprise cryptographic algorithm that UE supports, encryption key etc., this security association parameters is used for simulating CS domain signaling data to be used when PS territory and the switching of CS territory, and EMSC can notify UE not enable simulating the safety encipher of CS domain signaling data.If (then EMSC will generate this parameter of acquiescence for Radio Network Controller, the parameter that RNC) provides to need related radio network controller in the security association.In registration process, the UE in packet domain will provide the network side or the wireless side ability of relevant terminal to EMSC, and when bid, terminal also provides relevant ability to EMSC, as the parameter of classmark2.When will being used as follow-up switching, these parameters use.

Referring to Fig. 4, this method comprises:

UE is attached to network, and carries out the registration in a simulation CS territory.In registration process, the parameter of some terminal capabilities will be provided.

Terminal prepare to be initiated a calling, at first connects by the IP aspect, a service request information is encapsulated in the IP message by the form of intermediate layer protocol stack between UE and EMSC passes to EMSC.Carry the parameter of the relevant ability of UE in this message.After EMSC receives this message, may initiate the message of a CS territory discrimination weight to UE; Perhaps trigger EMSC simultaneously the data signaling that UE is carried on the packet domain is weighed the security association negotiation.Perhaps carry out the security association of transportation level Media Stream between triggering following EMGW and UE and consult, as consulting UE among the IP-SEC and the SA between EMSC and UE and EMGW again.

Described security association parameters is divided into following three classes:

1) security association of transportation level between terminal and EMSC, this association are to be used for protecting analog circuit domain service security between terminal and EMSC;

2) security association of transportation level between terminal and EMGW, this association are be used for protecting between terminal and EMGW on transportation level transmission media data flow related;

3) analog circuit domain associated safety relevant parameter between terminal and EMSC, this parameter is to use for follow-up terminal switches in the circuit domain.

Circuit domain message between follow-up UE and EMSC all can be transmitted by the IP layer between UE and EMSC by the form of above-mentioned message encapsulation.

401, when UE initiates audio call, EMSC receives call setup (Call Setup) message of UE;

When UE initiates audio call, and the agreement by interconnecting between the network (Internet Protocol, IP) the connective Call Setup message that sends is to EMSC, and the destination address in the Call Setup message is the IP address of EMSC.

Because the Media Stream of calling out carries in the PS territory, EMSC need be known the address and the listening port of UE receiving media face, can adopt diverse ways to consult the listening port of UE:

UE is to the predetermined automatically listening port of EMSC, for example: in terminal in the process of EMSC registration, EMSC gets access to the IP address and the port of terminal, terminal sends the signaling of simulation CS territory registration to EMSC by this IP address and port, terminal reports EMSC with this IP address and port, and this submitted IP address is as the address of terminal receiving media face.Terminal is according to the port that reports, and the port according to certain rule reservation receiving media face after EMSC receives the port that reports, also calculates the port of reservation according to identical rule, and the port of this reservation is as the listening port of terminal.

Perhaps, terminal is when EMSC registers, and terminal initiatively reports the address and the listening port of receiving media face to EMSC.

Perhaps, terminal is carried the address and the listening port of receiving media face in call signaling.

Perhaps, EMSC is by the PCC system, or PDN-GW triggers the dedicated bearing of setting up the medium face, carry default terminal prot number in the data flow template (TFT) that PCRF or PDN-GW issue, receive radio bearer (the Radio Bearer that sets up carrying when terminal, RB) after the message, find that TFT wherein carries default parameter, then select a RTP (Real-time Transport Protocol, RTP) and RTCP Real-time Transport Control Protocol (Real-time Transport Control Protocol, port numbers RTCP) is filled this default parameter; Terminal is responded this RB message, carries the port numbers of filling in the message of responding, and the message that terminal is responded finally turns back to EMSC, and the port of this filling is as the listening port of terminal.

Perhaps, UE is by carrying the information of monitoring the medium face in non-access layer information.As the address, port numbers etc., and send to EMSC by packet domain chain of command entity;

Again or, UE carries the information of monitoring the medium face in the intermediate layer of the above bearing call signaling of IP layer.As the address, port numbers etc.;

Because, in the process of calling out, the VoP of terminal will encapsulate with the form of RTP, therefore, need be in Call Setup message the encoding and decoding speech tabulation supported of carried terminal, the form of encoding and decoding adopts the form of audio visualization normative document (Profile of Audio Visual Profile, AVP Profile) to report.Perhaps the voice encoding and decoding format according to traditional circuit domain reports, will be after EMSC receives by a kind of mapping relations, the encoding and decoding of traditional circuit domain are mapped as the encoding and decoding of packet domain, and according to the condition of selecting, select suitable packet domain encoding and decoding and be notified to UE, so that terminal encapsulates speech data newspaper in packet domain, and UE is given in the circuit domain encoding and decoding that issue selection simultaneously.Perhaps also can in packet domain, all use the encoding and decoding of acquiescence, and the encoding and decoding of notifying UE in circuit domain, to use.

402, EMSC is to terminal response call proceeding (Call Proceeding) message;

403, EMSC according in the message related to calls to client information, send initial address message (IAM) to the MSC in CS territory, MSC according among the IAM to client information, the relevant parameter of opposite end carrying is fed back to EMSC;

Comprise two logic function module IM-MGW and MGW among the EMGW, corresponding, also comprise among the EMSC two logic function module MGCFs (Media Gateway Control Function, MGCF) and MSC; The Media Stream of CS territory business carries on the PS territory, the medium face data of the analog circuit domain business that terminal sends on packet domain will be sent to the IM-MGW module among the EMGW, after IM-MGW is the media formats in CS territory with the media format conversion of these medium face data, send to the MGW module among the EMGW, this MGW also may and the CS territory in set up between other MGW related.Here may trigger the selection course of an EMSC to EMGW, after MGCF among the EMSC selects IM-MGW, preserve the parameter of IM-MGW, MSC adopts this parameter to select MGW among the EMSC, MGW that assurance is chosen and IM-MGW promptly guarantee to select the uniqueness of MGW in same EMGW.EMSC selects the EMGW can be according to following condition: based on user contracting data, network topology, apparatus of load or carrier policy etc., for example: EMSC selects with the EMGW of terminal unit contractual or selects the EMGW etc. of load minimum.

In this step, need to select an EMGW, can select according to following principle:

1) the .EMSC entity is selected EMGW according to user contracting data;

2) .EMSC selects EMGW according to network topology, apparatus of load situation;

3). according to the policy selection EMGW of operator;

4) .EMSC is to HSS inquiring user subscription data, obtains the EMGW address of user when signatory from user contracting data, the EMGW address of the EMSC of EMGW address correspondence for selecting;

5) configuration data of .EMSC comprises the address of relevant EMGW;

6) .EMSC selects EMGW according to correlated condition (as subscription data, operator's preference, load, topology etc.) from the EMGW pond, and this process may comprise at first selects an EMGW pond, selects EMGW then from the pond;

7) .EMSC obtains the address of EMGW from the call signaling from the opposite end entity, and the EMGW of the address correspondence of described EMGW is the EMGW that described network side controlling call entity is selected.

404, EMSC controls the association that EMGW sets up Media Stream;

This Media Stream association has comprised the Media Stream association more than the IP aspect between terminal and the EMGW, need know the IP address of EMGW as terminal, monitor and the port (as RTP, the RTCP port) of control Media Stream, and the encoding and decoding speech of two sides of negotiationing use.Vice versa, also needs relevant parameter on the EMGW.Related in order to transmit EMGW with the Media Stream between the terminal, also need to set up the packet domain carrying that is used for transmitting IP aspect Media Stream association between terminal and the EMGW in packet domain, and the carrying between terminal and the packet domain gateway.

In addition, EMGW can be one or the independent logic entity that separates with EMSC.

The IP address of EMSC notice EMGW terminal, listening port number and the encoding and decoding of selecting, the perhaps IP address of EMSC notice EMGW terminal, the encoding and decoding of listening port number and acquiescence;

According to the address and the listening port of the receiving media face of terminal, EMSC sets up the Media Stream association of EMGW to terminal;

The carrying that the pattern of dedicated bearing is set up the analog voice business is set up in employing in evolvement network;

This process comprises following steps:

405-1, EMSC push away the business of relevant redetermination under PCRF, the user media stream information is described in the address etc. that can comprise EMSC in this message, as media stream rate, and the encoding and decoding of use, this service identification etc. (this sign be used for uses such as subsequent charging);

PCRF generates relevant strategy and qos parameter according to the type of service of receiving, PCRF also pushes away relevant strategy and qos parameter down and gives PDN-GW; Definition label is used for distinguishing the carrying of analog circuit domain and the carrying in other PS territory in the qos parameter;

405-2, PCRF can also push away the carrying request of setting up down and give PDN-GW; The carrying request of setting up can comprise the address of speech coding, EMSC, and speech coding can comprise the encoding and decoding in the encoding and decoding and circuit domain in the packet domain;

The QoS of the fixed carrying of qos policy value that 405-3, PDN-GW use is received, and issue carrying foundation request to Serving-GW.Comprise the encoding and decoding of voice in the message, the special label of definition, the address of EMSC; If can not come the sign of definition parallel circuit territory carrying, will adopt other a sign to discern this carrying by label.

405-4, gateway (Serving-GW) issue the carrying request of setting up and give MME, and carrying is set up in the request and comprised above parameter.

The address that 405-5, MME preserve EMSC in context in case follow-up switching use, and according to label, or special sign distinguishes the different and different PS territory carrying of carrying of this business, so that pay the utmost attention to when giving high priority with the assurance switching with this carrying during follow-up switchings.

MME sets up the parameter of session control, and MME issues the carrying request of setting up and gives evolution base station (ENB), and the parameter that comprises session control in the request is set up in carrying, and the parameter of session control comprises the encoding and decoding speech that UE uses;

405-6, ENB carry out the mapping of QoS, and preserve relevant encoding and decoding speech and realize better scheduling of resource.The message that issues radio bearer foundation is then given UE, carries the encoding and decoding speech (comprising the encoding and decoding of using in circuit domain and/or the packet domain) that UE needs in this message, and UE also responds radio bearer and sets up message.

405-7, ENB respond the message of carrying foundation and give MME;

405-8, MME respond the message of carrying foundation and give Serving-GW;

405-9, Serving-GW respond carrying and set up message to PDN-GW;

405-10, PDN-GW respond carrying and set up and finish message and give PCRF, and report the association identification of this carrying, as bearing identification, so that PCRF does related between the service surface of loading end and definition;

Set up in the process of dedicated bearing at above step 405-1 to 405-10:

The audio call parameter can be handed down to terminal, this audio call parameter comprises the encoding and decoding of EMSC selection and EMGW address and the port numbers that EMSC selects.Specific implementation can comprise: the information of EMSC definition chain of command interface Rx, issue the user media information that is used to set up the carrying of user media face to PCRF, carry this audio call parameter in the user media information, PCRF with this audio call parameter as the parameter among the TFT, be notified to packet data gateway (Packet Data Gateway, P-GW), P-GW by with gateway (Serving Gateway, S-GW), Mobility Management Entity (Mobility ManagementEntity, MME) and evolution UMTS Terrestrial radio access network (Evolution UMTS TerrestrialRadio Access Network, EUTRAN) set up between the evolution base station in (ENB) in the relevant signaling of dedicated bearing and carry this audio call parameter, terminal obtains this audio call parameter from the relevant signaling of setting up dedicated bearing from ENB.

EMSC is according to the instruction of receiving circuit domain call, analyze that the parameters such as encoding and decoding speech of carrying in the message related to calls define and the policy, billing system between this mutual professional parameter.

EMSC will provide the numerical value of VoIP encoding and decoding speech to the policy, billing system, and set up the relevant parameter of loading end.

EMSC will provide professional upper strata sign to the policy, billing system, come as the association charging system.

EMSC will provide the address of EMGW and the port numbers of receiving media face to the policy, billing system.

EMSC will come the discovery strategy charge system according to the IP address that terminal provides.

EMSC will issue the application service request to the policy, billing system according to the new business type parameter of definition, and the medium face that comes the trigger policy charge system to set up between terminal and the packet domain gateway to the packet domain gateway entity carries.

The policy, billing system will map out the qos parameter of setting up the packet domain carrying, and issue the parameter of setting up the packet domain load bearing requirements according to the application service request message of receiving from EMSC, and as QoS profile, parameters such as encoding and decoding speech are given the packet domain gateway.

The set of QoS (profile) comprises as guaranteeing speed, QoS label.The label of this QoS is according to the business of receiving the EMSC definition, the description of service attribute, parameter-definitions such as the encoding and decoding of voice;

Comprise specifically defined QoS sign (label) in the qos parameter that EMSC maps out.

The packet domain gateway will push away the packet domain carrying that these parameters are set up analog voice call down, and issue encoding and decoding speech to evolution base station, and terminal.The encoding and decoding speech here refers to encoding and decoding speech and the follow-up encoding and decoding speech that uses in the circuit domain that switches to of terminal that terminal is used in the PS territory.

Certainly, also can issue encoding and decoding speech by alternate manner, for example:

Network side controlling call entity (EMSC) sends to terminal by the network controls entity with high-level signaling, encoding and decoding speech that the high-level signaling carried terminal uses and the medium face parameter of EMGW;

Perhaps, the network side controlling call entity encapsulates the relevant parameter of analog voice call in the intermediate layer message of IP layer and audio call Signaling Layer, and terminal obtains the relevant parameter of analog voice call from intermediate layer message.

Perhaps, encoding and decoding speech that carried terminal uses in the circuit domain call signaling and/or the medium face parameter of EMGW.

The packet domain gateway will push away this qos parameter down and give packet domain chain of command entity, and this entity will be distinguished the packet domain carrying of analog voice call according to this parameter.For example according to specifically defined label, or increase the indication of some demonstrations, describe the carrying that this is carried as the audio data stream of simulation.

Use for follow-up switching, MME need be known the address of EMSC.

MME need know that the address of EMSC can be in the following ways:

Terminal keeps the address registration of EMSC in MME, this step can be finished after carrying is set up;

Perhaps, packet domain chain of command entity (MME) is to the address of logic entity module requester network side controlling call entity, and packet domain chain of command entity is preserved the address of the network side controlling call entity that inquires; Logic module can be local assigned user server (HSS) entity, but not only is limited as this entity;

Perhaps, in setting up the packet domain load bearing process, network side controlling call entity (EMSC) is with the address notification packet domain chain of command entity of network side controlling call entity;

Perhaps, EMSC can just obtain the address of MME when obtaining user contracting data.

Terminal may be set up the security association of the Media Stream between terminal and EMGW after obtaining the address of EMGW, guarantee the safety of voice calls data.

In addition, terminal can get access to the parameter of audio call, for example encoding and decoding by different modes.

This audio call parameter also can be notified to terminal by the call signaling between terminal and the EMSC.After terminal obtains this audio call parameter, medium face data are encoded, according to carrying out transfer of data between the address in the audio call parameter and port numbers and the EMGW according to the encoding and decoding in the audio call parameter.

This audio call parameter also can be notified to terminal by the Network Layer Signaling of carrying analog call signaling between terminal and the EMSC.After terminal obtains this audio call parameter, medium face data are encoded, according to carrying out transfer of data between the address in the audio call parameter and port numbers and the EMGW according to the encoding and decoding in the audio call parameter.

EMSC may encapsulate the parameter of simulation CS territory audio call in the intermediate layer message of IP layer and audio call Signaling Layer, and notice UE uses voice coder to separate parameters such as EMGW address.

After carrying is set up successfully, will report bearing identification to the EMSC entity.

406, after the carrying of analog voice business was set up, PCRF returned carrying to EMSC and confirms (ACK) message.

407, EMSC control EMGW revises the association of Media Stream, sets up the interoffice media bearer.

Carry out the association of Media Stream between IM-MGW among the EMSC control EMGW and the MGW, and set up the interoffice media bearer between IM-MGW and the MGW.Can also pass through the PCC system, service quality (Quality of Service, QoS) assurance of Media Stream between P-GW and IM-MGW set up in control.

The specific implementation of carrying out the QoS assurance can comprise:

EMSC control P-GW flows the processing of classifying from the data of the up IM-MGW of going to of terminal by IP;

EMSC control IM-MGW flows the processing of classifying from the descending data of going to terminal of IM-MGW by IP.

Wherein, EMSC control P-GW also can carry out the process of setting up the analog voice service bearer the step of classifying from the data of the up IM-MGW of going to of terminal by IP stream.

This method can also comprise:

408, EMSC receives the Address Complete Message (ACM) from opposite end MSC; This opposite end MSC is the MSC that the opposite end is controlled;

409, EMSC sends bell sound (Alerting) message to terminal;

410, EMSC receives and to reply (ANM) message from opposite end MSC;

411, EMSC triggers the modification of medium face, and issue connection (Connect) message to terminal, if the encoding and decoding of EMSC not being selected are notified to terminal, then can in the Alerting message that sends to terminal, carry this encoding and decoding in the load bearing process of setting up the analog voice business.

412, terminal is replied to connect to EMSC and is confirmed (Connect Ack) message.

Terminal is replied Connect Ack message, represents that then terminal sets up to the medium face of EMGW, and terminal can send speech data to EMGW; Terminal also can be set up one earlier behind the security association of EMGW, sends speech data to EMGW again; After all right relevant with the EMGW negotiation earlier medium face parameter of terminal, send speech data to EMGW again.

Embodiment two, realize the method for communication call, in the present embodiment, adopt network insertion service (Network Access Service, NAS) message encapsulation simulation CS territory calling signaling among the SAE.Referring to Fig. 5, under framework B shown in Figure 2, realize in the present embodiment that the method for communication call and the difference of each step among the embodiment one are:

When the CS that UE initiates to simulate adheres to, adhere to parameter by the interface transmission of similar Gs between MME and the EMSC;

When UE initiates audio call, will call setup message be encapsulated in the NAS message according to the configuration (the perhaps indication of basis network side entity when adhering to) of own upper layer module and send to MME.Increase a sign in this NAS message, this sign is used for indicating MME that the part of the analog circuit domain call setup message of this NAS is sent to an EMSC.

If EMSC initiates the authentication to terminal, then EMSC is encapsulated in authentication message in the upper-layer protocol body, and in this upper-layer protocol body, increase a sign, indication according to this sign, after MME receives this upper-layer protocol body, authentication message is encapsulated in the NAS message passes to terminal, this NAS message also increases a sign, sign in this NAS message is used for CS territory this authentication message of resume module of indicating terminal.

EMSC sends to terminal use's CS territory message related to calls by MME NAS forwards, MME increases relevant sign respectively in these NAS message, according to this relevant sign, the corresponding module in the terminal can be handled the relevant simulation CS territory message related to calls that encapsulates in the NAS message; The NAS message that does not have this relevant sign then MME can directly be handled.

With EMSC among the embodiment one by IP connectivity with the relevant parameter notice terminal of packet domain carrying different be, in the present embodiment, EMSC is by high-rise (as NAS layer message), set up the relevant parameter of the packet domain carrying of analog circuit domain calling by MME entity notice terminal, as the encoding and decoding in the PS territory, encoding and decoding in the CS territory, the port of the address of EMGW and receiving media face.

With terminal among the embodiment one by IP connectivity with the terminal its own IP address and accept to send the parameter notice EMSC of medium face different be, terminal may be by high-rise (as NAS layer message), send the parameter of medium face by MME entity notice EMSC terminal its own IP address and acceptance, as RTP, the port of RTCP etc.

Different with embodiment one is, EMSC will notify the address parameter (as the IP address etc.) of self to give MME, and MME also preserves this address in related context, and when the occurrence positions conversion, is notified to new MME entity.

Referring to Fig. 5, realize among the embodiment two that the method for communication call comprises:

The CS that UE initiates simulation adheres to, and adheres to parameter by the interface transmission of the similar Gs between EMSC and the MME.

501, when UE need initiate audio call, will call setup message be encapsulated in the NAS message according to the configuration (the perhaps indication of basis network side entity when adhering to) of own upper layer module and send to MME.Increase a sign in this NAS message, this sign is used for indicating MME that the part of the analog circuit domain call setup message of this NAS is sent to an EMSC.

EMSC initiates the authentication to terminal, then EMSC is encapsulated in authentication message in the upper-layer protocol body, and in this upper-layer protocol body, increase a sign, indication according to this sign, after MME receives this upper-layer protocol body, authentication message is encapsulated in the NAS message passes to terminal, this NAS message also increases a sign, sign in this NAS message is used for CS territory this authentication message of resume module of indicating terminal.

502, EMSC sends to terminal with NAS message with Call Proceeding message by MMW;

503, EMSC according in the message related to calls to client information, send initial address message (IAM) to the MSC in CS territory, MSC according among the IAM to client information, the relevant parameter of opposite end carrying is fed back to EMSC;

504, EMSC controls the association that EMGW sets up Media Stream;

This process comprises following steps:

505-1, EMSC push away the business of relevant redetermination under PCRF, can comprise the user media information such as address of EMSC in this message;

505-2, PCRF can also push away the carrying request of setting up down and give PDN-GW; The carrying request of setting up can comprise the address of speech coding, EMSC, and speech coding can comprise the encoding and decoding in the encoding and decoding and circuit domain in the packet domain;

The QoS of the fixed carrying of qos policy value that 505-3, PDN-GW use is received, and issue carrying foundation request to Serving-GW.Comprise the encoding and decoding of voice in the message, the special label of definition, the address of EMSC; If can not come the sign of definition parallel circuit territory carrying, will adopt other a sign to discern this carrying by label.

505-4, gateway (Serving-GW) issue the carrying request of setting up and give MME, and carrying is set up in the request and comprised above parameter.

The address that 505-5, MME preserve EMSC in context in case follow-up switching use, and according to label, or special sign distinguishes the different and different PS territory carrying of carrying of this business, so that pay the utmost attention to when giving high priority with the assurance switching with this carrying during follow-up switchings.

505-6, ENB carry out the mapping of QoS, and preserve relevant encoding and decoding speech and realize better scheduling of resource.The message that issues radio bearer foundation is then given UE, carries the encoding and decoding speech (comprising the encoding and decoding of using in circuit domain and/or the packet domain) that UE needs in this message, and UE also responds radio bearer and sets up message.

505-7, ENB respond the message of carrying foundation and give MME;

505-8, MME respond the message of carrying foundation and give Serving-GW;

505-9, Serving-GW respond carrying and set up message to PDN-GW;

505-10, PDN-GW respond carrying and set up and finish message and give PCRF, and report the association identification of this carrying, as bearing identification, so that PCRF does related between the service surface of loading end and definition;

506, after the carrying of analog voice business was set up, PCRF returned ACK message to EMSC.

507, EMSC control EMGW revises the association of Media Stream, sets up the interoffice media bearer.

This method can also comprise:

508, EMSC receives the Address Complete Message (ACM) from opposite end MSC; This opposite end MSC is the MSC that the opposite end is controlled;

509, EMSC sends to terminal with NAS message with Alerting message by MMW;

510, EMSC receives and to reply (ANM) message from opposite end MSC;

511, EMSC triggers the modification of medium face, and issue Connect message by MMW with NAS message and give terminal, if the encoding and decoding of EMSC not being selected are notified to terminal, then can in the Alerting message that sends to terminal, carry this encoding and decoding in the load bearing process of setting up the analog voice business.

512, terminal is replied Connect Ack message with NAS message to EMSC by MMW.

Embodiment three, a kind of method that realizes communication call, and in the present embodiment, by the process of setting up of the carrying in UE initiation packet territory, referring to Fig. 6, this method comprises:

600, in packet domain, set up transmission simulation CS territory and call out the PS territory carrying of registration;

601, simulation CS territory adheres to;

602, UE initiates UE in the CS territory of simulation and calls out according to the indication (as EMSC, MME etc.) of the upper layer network entity of receiving.The message related to calls in simulation CS territory can be issued EMSC with being connected of IP aspect between EMSC by UE; Perhaps, the message related to calls in simulation CS territory is issued the MME entity earlier, sends to EMSC by the interface between MME and EMSC again;

603, EMSC is according to the message related to calls received, and the medium face of setting up the call business between UE and EMGW is related;

604, after UE receives message from EMSC, the loading establishing process of initiating a packet domain, this carrying is used for the business such as CS territory voice of transportation simulator;

The loading establishing process of packet domain can comprise:

After EMSC receives message related to calls, the notice terminal is based upon the carrying of simulating circuit domain business on the packet domain, for example, by the parameter indication of a demonstration, notice UE sets up carrying.Encoding and decoding speech that EMSC uses terminal and the medium face parameter notice terminal of EMGW, the medium face parameter of EMGW comprise address, the port numbers of EMGW, the qos parameter on upper strata etc.

After terminal is received message from EMSC, trigger the process of setting up of the packet domain carrying of setting up a transportation simulator circuit domain business.Terminal can directly be received the message from EMSC, or receives message from EMSC by packet domain chain of command entity.

Terminal is according to the message of receiving from EMSC, and structure carries the QoS that sets up specifically, and parameters such as stream of packets template are initiated the process of the packet domain carrying of a transportation simulator circuit domain business.

The Service Gateway that terminal is selected is that terminal reports the Service Gateway under the IP address of EMSC when message related to calls.

After carrying was set up successfully, terminal can report bearing identification to EMSC.

UE sets up the address that can report EMSC in success or the loading establishing process in carrying and gives MME.

The method that realizes communication call can also comprise:

605, set up security association between terminal and EMGW, this security association is used to guarantee transmit safety of data between terminal and EMGW.

Embodiment four, a kind of method that realizes communication call, and in the present embodiment, by the process of setting up of MME initiation packet territory carrying, referring to Fig. 7, this method comprises:

700, in packet domain, set up transmission simulation CS territory and call out the PS territory carrying of registration;

701, simulation CS territory adheres to;

702, UE initiates the CS territory calling of simulation.The message related to calls in simulation CS territory can be issued EMSC with being connected of IP aspect between EMSC by UE, or through the MME entity, sends to EMSC by the interface between MME and EMSC;

703, EMSC is according to the message related to calls received, and the medium face of setting up the call business between UE and EMGW is related;

704, after MME receives message from EMSC, the loading establishing process of initiating a packet domain, this carrying is used for the business such as CS territory voice of transportation simulator;

The loading establishing process of packet domain can comprise:

After EMSC receives message related to calls, notice MME is based upon the carrying of simulation circuit domain business on the packet domain.For example, by the parameter indication of a demonstration, notice MME sets up carrying, or sets up this carrying by a proprietary message informing MME.EMSC is the address of EMGW, port numbers, the qos parameter on upper strata, parameters such as encoding and decoding speech notice MME.

After MME receives message from EMSC, trigger the process of setting up of the packet domain carrying of setting up a transportation simulator circuit domain business.MME will be according to the message of receiving from EMSC, the QoS that the current carrying of structure is set up, and parameters such as stream of packets template are initiated the process of the packet domain carrying of a transportation simulator circuit domain business.The Service Gateway that MME selects is that terminal reports the Service Gateway under the IP address of EMSC when message related to calls.

After carrying was set up successfully, MME set up success message to the carrying of EMSC feedback, and reports relevant bearing identification.

MME will preserve the address of EMSC in context, as using in follow-up switching.

The method that realizes communication call can also comprise:

705, set up security association between terminal and EMGW, this security association is used to guarantee transmit safety of data between terminal and EMGW.

Embodiment five, a kind of method that realizes communication call, and in the present embodiment, by the process of setting up of PDN-GW initiation packet territory carrying, referring to Fig. 8, this method comprises:

800, in packet domain, set up transmission simulation CS territory and call out the PS territory carrying of registration;

801, simulation CS territory adheres to;

802, UE initiates the CS territory calling of simulation.The message related to calls in simulation CS territory can be issued EMSC with being connected of IP aspect between EMSC by UE, or through the MME entity, sends to EMSC by the interface between MME and EMSC;

803, EMSC is according to the message related to calls received, and the medium face of setting up the call business between UE and EMGW is related;

804, EMSC notice PDN-GW, the loading establishing process of initiating a packet domain, this carrying is used for the business such as CS territory voice of transportation simulator;

The loading establishing process of packet domain can comprise:

After EMSC receives message related to calls, notice PDN-GW is based upon the carrying of simulation circuit domain business on the packet domain.EMSC is the address of EMGW, port numbers, the qos parameter on upper strata, the address notification PDN-GW of parameter such as encoding and decoding speech and EMSC.

After PDN-GW receives message from EMSC, trigger the process of setting up of the packet domain carrying of setting up a transportation simulator circuit domain business.PDN-GW will be according to the message of receiving from EMSC, the QoS that the current carrying of structure is set up, and parameters such as stream of packets template are initiated the process of the packet domain carrying of a transportation simulator circuit domain business.EMSC is according to receiving that when message related to calls the IP address of terminal selects a correct block domain data gateway, or terminal also can report the address of this packet domain gateway in message related to calls.

After carrying was set up successfully, PDN-GW can report the packet domain bearing identification to EMSC.

PDN-GW is the address notification MME of EMSC, and the MME and the address of preserving EMSC are as using in follow-up switching.

The method that realizes communication call can also comprise:

805, set up security association between terminal and EMGW, this security association is used to guarantee transmit safety of data between terminal and EMGW.

Embodiment one, realizes the method for releasing of communication call.Set up calling between the opposite end in terminal in the PS territory and CS territory or the fixed network, in framework A shown in Figure 1, the calling that network side is initiated communication discharges, for example initiatively on-hook of opposite end entity, then after the message of terminal reception from EMSC, terminal is initiated the process that the dedicated bearing of medium face is called out in deleting bearing CS territory.

Referring to Fig. 9, realize the method for releasing of communication call, comprising:

901, EMSC receives and discharges (release) message;

Initiatively on-hook of opposite end, opposite end network failure or when taking place with situations such as being connected of opposite end network are overtime, EMSC receives the release message from the opposite end network.

902, EMSC sends to disconnect by the IP aspect and connects (disconnect) message to terminal;

During the data that disconnect message is encapsulated in the IP layer according to the form of the middle adaptation layer of IP layer and analog circuit domain calling signaling layer are protected, packet destination address be the IP address of terminal;

903, EMSC control EMGW revises related Media Stream;

EMGW is modified to the Media Stream association of terminal;

904, EMSC feedback release finishes message;

This release finishes the release message that message is used for responding step 901;

905, terminal sends and discharges (Rel) message to EMSC;

906, EMSC issues Radio Link control (RLC) message and gives terminal;

907, after terminal is received RLC message, initiate the dispose procedure of dedicated bearing, this dedicated bearing is used to carry the CS territory and calls out medium face data;

When discharging dedicated bearing, can stop between PDN-GW and EMGW this Media Stream being carried out the behavior that QoS guarantees.

908, the relevant Media Stream of EMSC control EMGW deletion.It is related with the Media Stream between EMGW that the address that EMSC will provide terminal and receiving media face port discharge terminal to EMGW.

When carrying discharges, or after the carrying release, UE or network side entity (as EMSC) will notify the MME deletion to be kept at the address of the EMSC in the related context.

Also can be after step 905 terminal transmission Rel message be to EMSC, with regard to execution in step 908.

Embodiment two, realize the method for releasing of communication call, and in framework B shown in Figure 2, the calling that network side is initiated simulation CS territory, PS territory discharges.Referring to Figure 10, realize the method for releasing of communication call, be with the difference of the embodiment one of the method for releasing of realizing communication call:

Signaling between terminal and the EMSC is by NAS aspect between terminal and MME and the signaling plane transmission between MME and EMSC.The simulation CS domain signaling that EMSC issues terminal all passes through the NAS forwards of MME and gives terminal, and MME increases relevant sign and is used to distinguish normal N AS message in the NAS message of transmitting; According to this relevant sign, corresponding CS territory module is handled the simulation CS domain signaling in the NAS message in the terminal.

With EMSC among the embodiment one of the method for releasing of realizing communication call by IP connectivity issue disconnect message give terminal different be that in the present embodiment, EMSC issues disconnect message by MME and gives terminal;

With terminal among the embodiment one of the method for releasing of realizing communication call by IP connectivity send Rel message to EMSC different be that terminal sends Rel message to EMSC by MME in the present embodiment;

Issue RLC message with EMSC among the embodiment one of the method for releasing of realizing communication call by IP connectivity and be for the difference of terminal, EMSC issues RLC message by MME and gives terminal in the present embodiment.

Referring to Figure 10, realize among the embodiment two that the method for releasing of communication call comprises:

1001, EMSC receives release message;

1002, EMSC issues disconnect message to terminal by the NAS message of MME;

EMSC is encapsulated in disconnect message in the upper-layer protocol body, and in this upper-layer protocol body, increase a sign, indication according to this sign, after MME receives this upper-layer protocol body, disconnect message is encapsulated in the NAS message passes to terminal, this NAS message also increases a sign, and the sign in this NAS message is used for this disconnect message of CS territory resume module of indicating terminal.

1003, EMSC control EMGW revises related Media Stream;

EMGW is modified to the Media Stream association of terminal;

1004, EMSC feedback release finishes message;

This release finishes the release message that message is used for responding step 1001;

1005, terminal sends Rel message to EMSC by the NAS message of MME;

1006, EMSC issues Radio Link control RLC message to terminal by the NAS message of MME;

1007, after terminal is received RLC message, initiate the dispose procedure of dedicated bearing, this dedicated bearing is used to carry the CS territory and calls out medium face data;

1008, the relevant Media Stream of EMSC control EMGW deletion.

When carrying discharges, or after the carrying release of back, UE or network side entity (as EMSC) will notify the MME deletion to be kept at the address of the EMSC in the related context.

Also can the NAS message of step 1005 terminal by MME send Rel message to EMSC after, with regard to execution in step 1008.

Embodiment three, realize the method for releasing of communication call.In framework A shown in Figure 1, the calling that network side is initiated simulation CS territory, PS territory discharges.

Referring to Figure 11, realize the method for releasing of communication call, be with the difference of the embodiment one of the method for releasing of realizing communication call: in the present embodiment, EMSC simulate the dedicated bearing of CS territory calling medium face in packet domain by PCC system control deleting bearing.

In the present embodiment, EMSC will control the dispose procedure that PCRF initiates dedicated bearing by Rx interface, and this dedicated bearing is used to carry the CS territory and calls out the medium face;

In the present embodiment, EMSC will issue deletion application service request by Rx interface.The deletion application service request that the PCRF basis is received, to the request of PDN-GW transmission deleting bearing, and the numbering of carrying deleting bearing.PDN-GW initiates the dispose procedure of dedicated bearing according to the message of receiving from PCRF, and being used between release PDN-GW and UE carried the medium face carrying of calling out in the CS territory;

When discharging dedicated bearing, stop between P-GW and IM-MGW this speech data is carried out the behavior that QoS ensures.

Referring to Figure 11, realize among the embodiment three that the method for releasing of communication call comprises:

1101, EMSC receives release message;

1102, EMSC issues disconnect message and gives terminal;

1103, EMSC control EMGW revises related Media Stream;

EMGW is modified to the Media Stream association of terminal;

1104, EMSC feedback release finishes message;

This release finishes the release message that message is used for responding step 1101;

1105, terminal sends Rel message to EMSC;

1106, EMSC issues Radio Link control RLC message and gives terminal;

1107, EMSC is by the dispose procedure of Rx interface control PCRF initiation dedicated bearing, and this dedicated bearing is used to carry the CS territory and calls out medium face data;

1108, the relevant Media Stream of EMSC control EMGW deletion.

Also can the NAS message of step 1105 terminal by MME send Rel message to EMSC after, with regard to execution in step 1108.

Embodiment four, realize the method for releasing of communication call.In framework B shown in Figure 2, the calling that network side is initiated simulation CS territory, PS territory discharges.

Referring to Figure 12, realize the call release method of communication, be with the difference of the embodiment one of the method for releasing of realizing communication call: EMSC calls out the dedicated bearing of medium face by PCC system control deleting bearing CS territory.In the present embodiment, EMSC will issue deletion application service request by Rx interface.The deletion application service request that the PCRF basis is received, to the request of PDN-GW transmission deleting bearing, and the numbering of carrying deleting bearing.PDN-GW initiates the dispose procedure of dedicated bearing according to the message of receiving from PCRF, and being used between release PDN-GW and UE carried the medium face carrying of calling out in the CS territory; When discharging dedicated bearing, stop between P-GW and IM-MGW this speech data is carried out the behavior that QoS ensures.

Be that with the difference of the embodiment three of the method for releasing of realizing communication call the signaling between terminal and the EMSC is by NAS aspect between terminal and MME and the signaling plane transmission between MME and EMSC.The simulation CS domain signaling that EMSC issues terminal all passes through the NAS forwards of MME and gives terminal, and MME increases relevant sign and is used to distinguish normal N AS message in the NAS message of transmitting; According to this relevant sign, corresponding CS territory module is handled the simulation CS domain signaling in the NAS message in the terminal.

With EMSC among the embodiment one of the method for releasing of realizing communication call by IP connectivity issue disconnect message give terminal different be that in the present embodiment, EMSC issues disconnect message by MME and gives terminal; With terminal among the embodiment one of the method for releasing of realizing communication call by IP connectivity send Rel message to EMSC different be that terminal sends Rel message to EMSC by MME in the present embodiment; Issue RLC message with EMSC among the embodiment one of the method for releasing of realizing communication call by IP connectivity and be for the difference of terminal, EMSC issues RLC message by MME and gives terminal in the present embodiment.

Referring to Figure 12, realize among the embodiment four that the method for releasing of communication call comprises:

1201, EMSC receives release message;

Initiatively on-hook of opposite end, network failure or when taking place with situations such as being connected of network are overtime, EMSC receives the release message from the opposite end network.

1202, EMSC issues disconnect message to terminal by the NAS message of MME;

1203, EMSC control EMGW revises related Media Stream;

EMGW is modified to the Media Stream association of terminal;

1204, EMSC feedback release finishes message;

This release finishes the release message that message is used for responding step 1201;

1205, terminal sends Rel message to EMSC by the NAS message of MME;

1206, EMSC issues Radio Link control RLC message to terminal by the NAS message of MME;

1207, EMSC is by the dispose procedure of Rx interface control PCRF initiation dedicated bearing, and this dedicated bearing is used to carry the CS territory and calls out medium face data;

1208, the relevant Media Stream of EMSC control EMGW deletion.

Also can the NAS message of step 1205 terminal by MME send Rel message to EMSC after, with regard to execution in step 1208.

Embodiment five, realize the method for releasing of communication call, and referring to Figure 13, this method comprises:

1300, terminal has been initiated the audio call of an analog circuit domain in packet domain;

1301, EMSC receives from network side or end side analog circuit domain call release message;

1302, EMSC will notify entities such as UE and EMGW, discharge the association of related media face;

1303, EMSC will notify the MME entity to go to discharge relevant packet domain carrying;

1304, the MME entity will go to delete or revise relevant packet domain carrying according to the message of receiving.

The MME entity will go to delete or revise relevant packet domain carrying according to the message of receiving and can comprise:

The MME entity will go relevant packet domain carrying of index according to the EMSC address that is kept in the context.

The MME entity will be deleted or discharge relevant packet domain and carry according to the bearing identification that EMSC provides.

Embodiment six, realize the method for releasing of communication call, and referring to Figure 14, this method comprises:

1400, terminal has been initiated the audio call of an analog circuit domain in packet domain;

1401, EMSC receives from network side or end side analog circuit domain call release message;

1402, EMSC will notify entities such as UE and EMGW, discharge the association of related media face;

1403, EMSC will notify the PDN-GW entity to go to discharge relevant packet domain carrying;

1404, the PDN-GW entity will go to delete or revise relevant packet domain carrying according to the message of receiving.

The PDN-GW entity will go to delete or revise relevant packet domain carrying according to the message of receiving and can comprise:

PDN-GW will go deletion or revise a packet domain carrying as the five-tuple parameter of IP aspect according to the sign of an IP traffic of receiving.

Relevant packet domain carrying be deleted or be revised to the PDN-GW entity will according to the bearing identification that EMSC provides.

Embodiment, referring to Figure 15, a kind of subscriber equipment comprises:

Transmission unit 1501 is used for carrying out the mutual of message with packet domain chain of command entity;

Encapsulation unit 1502, send to transmission unit after being used for signaling is encapsulated in the network non-access layer information, carry indication information in the network non-access layer information, indication information is used for packet domain chain of command entity and judges whether the network non-access layer information is sent to the network side controlling call entity;

Decapsulation unit 1503, be used for always from the message deblocking that transmits the unit take on corresponding signaling and terminal is provided and the network side controlling call entity between the peer protocol layer entity of transportation level.

Embodiment, referring to Figure 16, a kind of packet domain chain of command entity comprises:

Receiving element 1601 is used to receive the message from subscriber equipment or network side controlling call entity;

Judging unit 1602 is used to judge whether message from subscriber equipment needs to network side controlling call entity transparent transmission, whether needs to the subscriber equipment transparent transmission from the message of network side controlling call entity; Then generate control command if desired;

Transmitting element 1603 is used for according to control command, will from the message of user's equipment to network side controlling call entity transparent transmission, from the message of network side controlling call entity to the subscriber equipment transparent transmission.

Embodiment, referring to Figure 17, a kind of network side controlling call entity comprises:

Receiving element 1701 is used for towards packet domain and circuit domain the message in receiving circuit territory;

Control unit 1702 is used for the message according to circuit domain, generates control command;

Transmitting element 1703 is used for according to control command, issues corresponding data or signaling.

Embodiment, referring to Figure 18, a kind of system that realizes communication call comprises:

Network side controlling call entity 1801 is used for the message according to circuit domain, generates the control command towards packet domain and circuit domain;

EMGW1802 is used for according to control command, and foundation is related with the medium face between the terminal;

Packet domain gateway 1803 is used for according to control command, the carrying between foundation and the terminal, and carrying is used for the analog circuit domain business data of transmission terminal in packet domain.

Wherein, EMGW comprises:

First gateway 18021 is used for towards packet domain, and is to change between the form of circuit domain voice packet domain speech data format conversion;

Second gateway 18022 is used for towards circuit domain, and and first gateway between carry out transfer of data.

One of ordinary skill in the art will appreciate that all or part of step that realizes in the foregoing description method is to instruct relevant hardware to finish by program, described program can be stored in the computer read/write memory medium, as: this program can comprise the steps: to receive the message related to calls of self terminal when carrying out; According to described message related to calls, it is related with the medium face between the described terminal that evolution media gateway EMGW is set up in control; According to described message related to calls, the carrying between described terminal and the packet domain gateway is set up in control, and described carrying is used for transmitting the analog circuit domain business data of described terminal in packet domain, described storage medium, as: ROM/RAM, magnetic disc, CD etc.

The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims

1. a method that realizes communication call is characterized in that, this method comprises:

Receive the message related to calls of self terminal;

2. method according to claim 1 is characterized in that, described reception comes the message related to calls of self terminal specifically to comprise:

Described terminal sends call setup message to the network side controlling call entity, carries described message related to calls in the described call setup message, and the destination address of described call setup message is the address of described network side controlling call entity;

Described network side controlling call entity obtains described message related to calls from described call setup message.

3. method according to claim 1 is characterized in that, described reception comes the message related to calls of self terminal specifically to comprise:

Described terminal sends network layer message to packet domain chain of command entity, the described message related to calls of encapsulation in the described network layer message, described network layer message is carried indication information, and described indication information is used for described packet domain chain of command entity and judges whether described network layer message is sent to the network side controlling call entity;

If judge described network layer message to be sent to described network side controlling call entity, then described packet domain chain of command entity sends to described network side controlling call entity with described network layer message;

Described network side controlling call entity deblocking from described network layer message takes on described message related to calls.

4. method according to claim 1 is characterized in that, the carrying that described control is set up between described terminal and the packet domain gateway specifically comprises:

Network side controlling call entity control strategy charge system triggers the carrying of setting up packet domain, and the carrying of described packet domain is used for the transportation simulator circuit domain service data;

Described network side controlling call entity is controlled described EMGW and is set up the interoffice media bearer.

5. method according to claim 1, it is characterized in that, the relevant parameter of terminal media stream comprises the listening port of encoding and decoding speech, terminal receiving media face and the address of receiving media face, and described network side controlling call entity is controlled described EMGW foundation and specifically comprised with the Media Stream between the described terminal is related:

Described network side controlling call entity sends to described EMGW with the relevant parameter of the Media Stream of described terminal;

According to the relevant parameter of the Media Stream of described terminal, described EMGW set up with described terminal between Media Stream related.

6. method according to claim 1 is characterized in that, this method also comprises:

The security association of the transportation level between described EMGW foundation and the described terminal is set up in the control of network side controlling call entity, is used to guarantee media stream data safety of transmission between described EMGW foundation and the described terminal.

7. method according to claim 4 is characterized in that, described network side controlling call entity is controlled the carrying that described policy, billing system triggers sets up packet domain and specifically comprised:

Described policy, billing system is found in the IP address that described network side controlling call entity provides according to described terminal;

The parameter that described network side controlling call entity carries according to described message related to calls define and described policy, billing system between interaction parameter; Described interaction parameter comprises the numerical value of encoding and decoding speech, the relevant parameter of setting up loading end, professional upper strata sign, the medium face parameter of described EMGW, the address of described network side controlling call entity, and described professional upper strata sign is used for related described policy, billing system;

Described network side controlling call entity is according to described interaction parameter, issue the application service request to described policy, billing system, described application service request is used to trigger described policy, billing system and sets up medium face carrying between described terminal and the described packet domain gateway to the packet domain gateway;

Described network side controlling call entity issues described interaction parameter to described policy, billing system;

Described policy, billing system maps out the QoS parameter of setting up the packet domain carrying according to described application service request message, and described QoS parameter comprises and guarantees speed, service quality sign;

Described policy, billing system issues the parameter that is used to set up the packet domain carrying and gives described packet domain gateway, and the described parameter that is used to set up the packet domain carrying comprises described QoS parameter, interaction parameter;

Push away the described parameter that is used to set up the packet domain carrying under the described packet domain gateway;

Described packet domain gateway sends to described packet domain chain of command entity with bearing identification, and whether described bearing identification is used to distinguish is the carrying of the packet domain Circuit Service of simulation;

Set up the packet domain carrying according to the described parameter that is used to set up the packet domain carrying;

Described packet domain gateway issues described encoding and decoding speech and gives evolution base station and described terminal, is used for described evolution base station and realizes scheduling of resource according to described encoding and decoding speech;

Described packet domain gateway issues the address of described network side controlling call entity and gives described packet domain chain of command entity, is used for using at follow-up handoff procedure;

Push away described QoS parameter under the described packet domain gateway and give packet domain chain of command entity, described packet domain chain of command entity is distinguished or is defined described packet domain carrying according to the parameter of described service quality and whether is used for transmitting the analog circuit domain business data of described terminal in packet domain;

After described packet domain carrying is set up, described packet domain gateway will report bearing identification to described network side controlling call entity.

8. method according to claim 7 is characterized in that, this method also comprises:

The service quality that described network side controlling call entity is controlled analog circuit domain business data between described EMGW and the described packet domain gateway guarantees.

9. method according to claim 8 is characterized in that, the service quality that described network side controlling call entity is controlled analog circuit domain business data between described EMGW and the described packet domain gateway guarantees specifically to comprise:

Described packet domain gateway is to handling from the up analog circuit domain business data of going to described EMGW of described terminal, to guarantee the transmission service quality between described packet domain gateway and the described EMGW;

Described EMGW handles the descending analog circuit domain business data of going to described terminal, to guarantee the transmission service quality between described EMGW and the described packet domain gateway.

10. method according to claim 1 is characterized in that, the carrying that described control is set up between described terminal and the described EMGW specifically comprises:

After receiving message related to calls, the network side controlling call entity notifies described terminal to be based upon the carrying of transmission analog circuit domain business on the packet domain.

11. method according to claim 10 is characterized in that, the carrying that described network side controlling call entity notifies described terminal to be based upon transmission analog circuit domain business on the packet domain specifically comprises:

Described network side controlling call entity sends the message of setting up carrying to described terminal, and perhaps described network side controlling call entity sends the message of setting up carrying by packet domain chain of command entity to described terminal;

Described network side controlling call entity is notified described terminal with the relevant parameter of analog voice call, the relevant parameter of described analog voice call comprises encoding and decoding that described terminal is used and the medium face parameter of described EMGW, and the medium face parameter of described EMGW comprises address, the port numbers of EMGW, the QoS parameter on upper strata;

Described terminal is according to the message of described foundation carrying, and the relevant parameter that the structure carrying is set up transmits the foundation of the carrying of analog circuit domain business on the initiation packet territory, and described relevant parameter comprises QoS parameter, stream of packets template;

In setting up load bearing process, the Service Gateway that described terminal is selected is that described terminal reports the Service Gateway under the terminal address of network side controlling call entity in message related to calls; Perhaps, in setting up load bearing process, the Service Gateway of described packet domain chain of command entity selection is the affiliated Service Gateway of terminal address that described terminal to report is given the network side controlling call entity;

Described terminal reports carrying to set up success response to described network side controlling call entity;

Described terminal reports bearing identification to described network side controlling call entity.

12. method according to claim 1 is characterized in that, described network side controlling call entity control is set up terminal and is specifically comprised with the Media Stream between EMGW is related::

Described terminal reports the encoding and decoding speech tabulation of support to described network side controlling call entity; Described network side controlling call entity is selected encoding and decoding from described encoding and decoding speech tabulation; Described network side controlling call entity is handed down to described terminal with the encoding and decoding of selection and the medium face parameter of described EMGW;

Perhaps, described network side controlling call entity sends to described terminal with the relevant parameter of described analog voice call;

Perhaps, described network side controlling call entity selects to send the medium face parameter of different encoding and decoding and described EMGW to described terminal; Described different encoding and decoding comprise the circuit domain encoding and decoding that encoding and decoding speech that described terminal is used and/or described terminal are used after switching to circuit domain in the future in packet domain; Described different encoding and decoding comprise the encoding and decoding of described network side controlling call entity acquiescence;

Perhaps, described network side controlling call entity sends to described terminal by the network controls entity with high-level signaling, and the encoding and decoding speech of described terminal use and the medium face parameter of described EMGW are carried in described high-level signaling;

Perhaps, in the process of setting up the carrying between described terminal and the network side gateway entity, described network side controlling call entity is notified described terminal by high-rise analog voice call signaling with the relevant parameter of described analog voice call;

Perhaps, described network side controlling call entity encapsulates the relevant parameter of described analog voice call in the intermediate layer message of IP layer and audio call Signaling Layer, and described terminal obtains the relevant parameter of described analog voice call from described intermediate layer message;

Perhaps, encoding and decoding speech that carried terminal uses in the circuit domain call signaling and/or the medium face parameter of EMGW; The network side controlling call entity is notified to described EMGW with the parameter of described terminal, and the parameter of described terminal comprises the address of terminal, monitoring and the port numbers of control medium face, the encoding and decoding speech of selection.

13. method according to claim 1 is characterized in that, the carrying that described control is set up between described terminal and the packet domain gateway specifically comprises:

After receiving message related to calls, network side controlling call entity notice packet territory chain of command entity is based upon the carrying of transmission analog circuit domain business on the packet domain.

14. method according to claim 13 is characterized in that, the carrying that described network side controlling call entity notice packet territory chain of command entity is based upon transmission analog circuit domain business on the packet domain specifically comprises:

Described network side controlling call entity sends the message of setting up carrying to packet domain chain of command entity;

Described network side controlling call entity is notified described packet domain chain of command entity with the relevant parameter of analog voice call, the relevant parameter of described analog voice call comprises encoding and decoding that described terminal is used and the medium face parameter of described EMGW, and the medium face parameter of described EMGW comprises address, the port numbers of EMGW, the QoS parameter on upper strata;

Described packet domain chain of command entity is according to the message of described foundation carrying, and the relevant parameter that the structure carrying is set up transmits the foundation of the carrying of analog circuit domain business on the initiation packet territory, and described relevant parameter comprises QoS parameter, stream of packets template;

In setting up load bearing process, the Service Gateway of described packet domain chain of command entity selection is that described terminal reports the Service Gateway under the terminal address of network side controlling call entity in message related to calls;

Described packet domain chain of command entity reports carrying to set up success response to described network side controlling call entity;

Described packet domain chain of command entity reports bearing identification to described network side controlling call entity;

Described packet domain chain of command entity is saved in the address of network side controlling call entity in the related context.

15. method according to claim 1 is characterized in that, the carrying that described control is set up between described terminal and the packet domain gateway specifically comprises:

After receiving message related to calls, network side controlling call entity notice packet territory gateway entity is based upon the carrying of transmission analog circuit domain business on the packet domain.

16. method according to claim 15 is characterized in that, the carrying that described network side controlling call entity notice packet territory gateway entity is based upon transmission analog circuit domain business on the packet domain specifically comprises:

Described network side controlling call entity sends the message of setting up carrying to the packet domain gateway entity;

Described network side controlling call entity is notified described packet domain gateway entity with the relevant parameter of analog voice call, the relevant parameter of described analog voice call comprises encoding and decoding that described terminal is used and the medium face parameter of described EMGW, and the medium face parameter of described EMGW comprises address, the port numbers of EMGW, the QoS parameter on upper strata;

Described packet domain gateway entity is according to the message of described foundation carrying, and the relevant parameter that the structure carrying is set up transmits the foundation of the carrying of analog circuit domain business on the initiation packet territory, and described relevant parameter comprises QoS parameter, stream of packets template;

In setting up load bearing process, the Service Gateway that described packet domain gateway entity is selected is that described terminal reports the Service Gateway under the terminal address of network side controlling call entity in message related to calls, and the Service Gateway that perhaps described packet domain gateway entity is selected is the block domain data gateway that described network side controlling call entity is selected according to the terminal address in the message related to calls;

Described packet domain gateway entity reports carrying to set up success response to described network side controlling call entity;

Described packet domain gateway entity reports bearing identification to described network side controlling call entity.

17. method according to claim 1 is characterized in that: this method also comprises:

Described network side controlling call entity is known the relevant parameter of described terminal media stream.

18. method according to claim 17, it is characterized in that, the relevant parameter of described terminal media stream comprises the address of the listening port and the receiving media face of terminal receiving media face, and described network side controlling call entity knows that the relevant parameter of described terminal media stream specifically comprises:

Described terminal reports the relevant parameter of Media Stream to described network side controlling call entity;

Perhaps, described terminal is carried the relevant parameter of Media Stream in the signaling that sends to described network side controlling call entity;

Perhaps, when described terminal is registered to described network side controlling call entity, report port and IP address, described terminal is according to the port that reports, reserve port according to certain rule, after described network side controlling call entity receives the described port that reports, calculate the port of reservation according to identical rule, the port of described reservation is as the listening port of described terminal receiving media face;

Perhaps, described network side controlling call entity control is set up when the carrying of the analog circuit domain business of described terminal, issue the message of carrying default port numbers, described terminal is filled described default port numbers, and described terminal sends to the default port numbers of address and filling or is transmitted to described network side controlling call entity by intermediate entities in receiveing the response; Described address is as the address of described terminal receiving media face, and the default port numbers corresponding port of described filling is as the listening port of described terminal receiving media face;

Perhaps, described terminal is carried the relevant parameter of Media Stream in non-access layer information, and packet domain chain of command entity sends to described network side controlling call entity with described non-access layer information;

Perhaps, described terminal is carried the relevant parameter of Media Stream in the intermediate layer of the above bearing call signaling of Internet protocol IP layer, and described network side controlling call entity obtains the relevant parameter of described Media Stream from described intermediate layer.

19. method according to claim 1 is characterized in that, this method also comprises:

Packet domain chain of command entity is known the address of network side controlling call entity.

20. method according to claim 19 is characterized in that, described packet domain chain of command entity knows that the address of described network side controlling call entity specifically comprises:

After described terminal is obtained the address of described network side controlling call entity, with the described packet domain chain of command of the address notification of described network side controlling call entity entity; Described packet domain chain of command entity is saved in the address of described network side controlling call entity in the relevant context, uses when being used for follow-up switching; Obtain the address of new network side controlling call entity when described terminal after, with the described packet domain chain of command of the address notification entity of described new network side controlling call entity; After packet domain chain of command entity changed, former packet domain chain of command entity passed to new packet domain chain of command entity with the address of described network side controlling call entity;

Perhaps, described packet domain chain of command entity is inquired about the address of described network side controlling call entity to the logic entity module, and described packet domain chain of command entity is preserved the address of the described network side controlling call entity that inquires; Logic module can but be not limited to the local assigned user server;

Perhaps, in setting up the packet domain load bearing process, described network side controlling call entity with the address of described network side controlling call entity direct or indirect be notified to described packet domain chain of command entity, the address that described packet domain chain of command entity is preserved described network side controlling call entity.

21. method according to claim 1 is characterized in that, this method also comprises:

Set up the security association between described terminal and network side controlling call entity;

Preserve security association parameters among described network side controlling call entity and the EMGW, described security association parameters is used to protect the data of analog circuit domain calling signaling face and data surface.

22. method according to claim 21 is characterized in that, the described security association of setting up between described terminal and network side controlling call entity comprises:

Set up first security association of transportation level between described terminal and the described network side controlling call entity, described first safety management is used to protect analog circuit domain service security between described terminal and the described network side controlling call entity;

Set up second security association of transportation level between described terminal and the described EMGW, described second security association is used to protect the association of transmission media data flow on transportation level between described terminal and the described EMGW;

Set up the 3rd security association between described terminal and the described network side controlling call entity, the relevant parameter of the 3rd security association is used for switching to circuit domain in follow-up terminal to be used.

23. method according to claim 21 is characterized in that, this method also comprises:

According to described security association parameters, described network side controlling call entity carries out the circuit domain authentication to described terminal;

Described network side controlling call entity is preserved the relevant parameter of authentication.

24. method according to claim 21 is characterized in that, this method also comprises:

According to described security association parameters, described network side controlling call entity carries out discrimination weight to described terminal.

Perhaps, described network side controlling call entity and EMGW weigh the security association negotiation to the signaling plane of described terminal simulation circuit domain call and the data of data surface.

25. method according to claim 1 is characterized in that, this method also comprises:

The network side controlling call entity is selected EMGW.

26. method according to claim 25 is characterized in that, described network side controlling call entity selects EMGW specifically to comprise:

Described network side controlling call entity is selected EMGW according to user contracting data;

Perhaps, described network side controlling call entity is selected EMGW according to network topology, apparatus of load situation;

Perhaps, described network side controlling call entity is according to the policy selection EMGW of operator;

Perhaps, described network side controlling call entity is to HSS inquiring user subscription data, obtains the EMGW address of user when signatory from described user contracting data, and the EMGW of described EMGW address correspondence is the EMGW that described network side controlling call entity is selected;

Perhaps, the configuration data of described network side controlling call entity comprises the address of EMGW, and the EMGW of the address correspondence of described EMGW is the EMGW that described network side controlling call entity is selected;

Perhaps, described network side controlling call entity is selected the EMGW pond, and described network side controlling call entity is selected EMGW from described EMGW pond;

Perhaps, described network side controlling call entity obtains the address of EMGW from the call signaling from the opposite end entity, and the EMGW of the address correspondence of described EMGW is the EMGW that described network side controlling call entity is selected.

27. method according to claim 1 is characterized in that, this method also comprises:

Conversion between the encoding and decoding speech that multimedia Media Gateway Module among the network side controlling call entity selection EMGW and Media Gateway Module carry out packet domain encoding and decoding speech and circuit domain; Described multimedia Media Gateway Module and Media Gateway Module are in same EMGW.

28. method according to claim 27 is characterized in that, described network side controlling call entity selects multimedia Media Gateway Module and the Media Gateway Module among the EMGW specifically to comprise:

Described network side controlling call entity is preserved the multimedia Media Gateway Module address of selecting;

Described network side controlling call entity is selected the media gateway in the EMGW module of described multimedia Media Gateway Module address correspondence.

29., it is characterized in that described network side controlling call entity comprises the EMSC of evolution mobile switching centre in the evolution system according to one of them described method of claim 2 to 28; Described packet domain chain of command entity comprises the Mobility Management Entity MME in the evolution system; Described packet domain gateway entity comprises packet data gateway PD-GW; Described policy, billing system comprises "Policy and Charging Rules Function PCRF module.

30. method according to claim 29 is characterized in that, described network side controlling call entity and described EMGW are positioned at same logic entity, and perhaps, described network side controlling call entity is positioned at the logic entity that separates with described EMGW.

31. a method for releasing of realizing communication call is characterized in that, this method comprises:

32. method for releasing according to claim 31 is characterized in that, described message to the release session of terminal transtation mission circuit territory specifically comprises:

The network side controlling call entity is to the message of described terminal transtation mission circuit territory release session, and the destination address that described circuit domain discharges the message of session is the address of described terminal.

33. method for releasing according to claim 31 is characterized in that, described message to the release session of terminal transtation mission circuit territory specifically comprises:

The network side controlling call entity sends release message to packet domain chain of command entity, the encapsulated circuit territory discharges the message of session in the described release message, described release message carries indication information, and described indication information is used for described packet domain chain of command entity and judges whether described release message is sent to described terminal;

If judge and described release message need be sent to described terminal, then described packet domain chain of command entity sends to described terminal with described release message;

Described terminal deblocking from described release message takes on the message that described circuit domain discharges session.

34. method for releasing according to claim 31 is characterized in that, the carrying between described release packet domain gateway and the terminal specifically comprises:

According to the message of the described circuit domain release session of receiving, described terminal is initiated the process that carrying discharges in packet domain, discharges the carrying of setting up between described terminal and the packet domain gateway.

35. method for releasing according to claim 34 is characterized in that, the carrying between described release packet domain gateway and the terminal specifically also comprises:

Described EMGW sends application service to the policy, billing system and discharges request;

Described policy, billing system discharges request according to described application service, issues carrying to the block domain data gateway and releases order;

Described block domain data gateway releases order according to described carrying, discharges the packet domain carrying with described terminal room.

36. method for releasing according to claim 35 is characterized in that, the carrying between described release packet domain gateway and the terminal specifically also comprises:

Described network side controlling call entity is controlled the relevant Media Stream association of described EMGW deletion.

37. method according to claim 31 is characterized in that, described end EMGW specifically comprises with the medium face between the terminal is related:

The network side controlling call entity offers described EMGW with the address and the receiving media face port of terminal;

It is related with the Media Stream of described terminal with the release of receiving media face port according to the address of described terminal that described network side controlling call entity is controlled described EMGW.

38., it is characterized in that this method also comprises according to the described carrying method for releasing of claim 37:

The service quality of described network side controlling call entity control stopping analog circuit domain business data between described EMGW and the described packet domain gateway guarantees.

39. method for releasing according to claim 31 is characterized in that, the carrying between described release packet domain gateway and the terminal specifically comprises:

Network side controlling call entity notice packet territory gateway entity is released in the carrying of transmission analog circuit domain business on the packet domain;

Described network side controlling call entity is controlled the relevant medium face association of described EMGW deletion.

40., it is characterized in that the carrying that described packet domain gateway entity is released in transmission analog circuit domain business on the packet domain specifically comprises according to the described method for releasing of claim 39:

According to the sign of a Internet protocol data stream of receiving, packet domain carrying of described packet domain gateway entity deletion; The sign of described the Internet protocol data stream comprises the five-tuple parameter of Internet protocol aspect;

According to the sign of a Internet protocol data stream of receiving, described packet domain gateway entity is revised a packet domain carrying;

According to a bearing identification of receiving, the packet domain carrying that described packet domain gateway entity deletion is relevant;

According to a bearing identification of receiving, described packet domain gateway entity discharges relevant packet domain carrying.

41. method for releasing according to claim 31 is characterized in that, the carrying between described release packet domain gateway and the terminal specifically comprises:

Network side controlling call entity notice packet territory chain of command entity is released in the carrying of transmission analog circuit domain business on the packet domain;

42. method for releasing according to claim 31 is characterized in that, the carrying that described network side controlling call entity notice packet territory chain of command entity is released in transmission analog circuit domain business on the packet domain specifically comprises:

Described network side controlling call entity notice packet territory chain of command entity is modified in the carrying of transmission analog circuit domain business on the packet domain;

According to the network side controlling call entity address that is kept in the context, relevant packet domain carrying of described packet domain chain of command entity index;

According to a bearing identification of receiving, the relevant carrying of described packet domain chain of command entity deletion;

According to a bearing identification of receiving, described packet domain chain of command entity discharges relevant carrying.

43. method for releasing according to claim 31 is characterized in that, this method also comprises:

Notice packet territory chain of command entity is deleted the address of the network side controlling call entity of preserving in the described packet domain chain of command entity.

44., it is characterized in that the address of the network side controlling call entity of preserving in the described packet domain chain of command of the described deletion entity specifically comprises according to the described method for releasing of claim 43:

Described terminal is gone to the address of the described network side controlling call entity of described packet domain chain of command entity deletion preservation;

Perhaps, described network side controlling call entity is notified the address that described packet domain chain of command entity removes to delete described network side controlling call entity;

Perhaps, in the carrying dispose procedure, described packet domain chain of command entity goes to delete the address of the described network side controlling call entity of preservation.

45. a subscriber equipment is characterized in that, comprising:

46. a packet domain chain of command entity is characterized in that, comprising:

47. a network side controlling call entity is characterized in that, comprising:

48. a system that realizes communication call is characterized in that, comprising:

49., it is characterized in that described EMGW comprises according to the described system of claim 48:

First gateway is used for towards packet domain, and is to change between the form of circuit domain voice packet domain speech data format conversion;

Second gateway is used for towards circuit domain, and and described first gateway between carry out transfer of data.