WO2007033568A1

WO2007033568A1 - A method for providing the multiple rate data information bearing service and a system, a apparatus thereof

Info

Publication number: WO2007033568A1
Application number: PCT/CN2006/001959
Authority: WO
Inventors: Shibi Huang
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2005-09-23
Filing date: 2006-08-03
Publication date: 2007-03-29
Also published as: CN1882023A; CN100499720C

Abstract

A method for providing the multiple rate data information bearing service and a system, a apparatus thereof include: establish the calling multiple time slots logic terminal and the calling Internet Protocol (IP) logic terminal in the calling media gateway (MG) (103); establish the called multiple time slots logic terminal and the called IP logic terminal in the called MG (106); and negotiate the media description information between the calling IP logic terminal and the called IP logic terminal; finally, ensure that the next generation network (NGN) could provide the multiple rate data information bearing service for the calling terminal equipment (TE) (101) and called terminal equipment (106). The providing of the multiple rate data information bearing service in the NGN could assist the current network to be the NGN, and improve the satisfaction of the user, and advance the competition of the network provider and the service provider.

Description

Method, system and device for realizing multi-rate data information bearer service

The present invention relates to network communication technologies, and in particular, to a method, system and apparatus for implementing a multi-rate data information bearer service. Background of the invention

With the development of network communication, Next Generation Network (NGN) communication technology has received more and more attention, and in order to reduce the network construction cost and ensure the continuity of the development of network communication technology, people are trying to make the existing network to NGN. Smooth evolution.

Currently, there are many communication networks that are evolving to NGN, including the Integrated Services Data Network (ISDN). A very basic and important function that ISDN can implement is to provide multi-rate data information bearer services for terminal equipment (TE), namely: protocol packet encapsulation of audio and video encoded streams, and multiplexing of encapsulated protocol packets. n X 64kbit/s multiple sub-rate transmission channels for data transmission. The above n is at least 2, and its maximum value is limited only by the number of transmission channels supported by the communication port that the communication device can provide.

Based on the above-mentioned multi-rate data information bearer service, ISDN can easily support communication applications such as video communication and data communication with high transmission rate requirements. When ISDN is evolved to NGN, it is preferable to enable NGN to provide the multi-rate as well. Data information carries services. However, NGN is a new communication network that controls the separation from bearers and uses Internet Protocol (IP) bearers. The Media Gateway Control Entity (MGC) in NGN usually performs call session control, media gateway control, media negotiation, signaling processing, etc. For controlling and managing the related operations of the communication; the media gateway (MG) in the NGN usually performs specific media conversion, data transmission and other bearer operations under the control of the media gateway control entity. It can be seen that the operation logic of the NGN is different from the existing other communication networks, which leads to the implementation method of the ISDN providing the multi-rate data information bearer service. It cannot be directly transferred to the NGN. Therefore, the NGN cannot implement the multi-rate data information bearer service between ISDN TEs. Summary of the invention

In view of this, the main object of the present invention is to provide an implementation method and system for providing multi-rate data information carrying services to ensure that NGN can provide multi-rate data information bearer services.

Another object of the present invention is to provide an apparatus for providing multi-rate data information bearer services to ensure that NGN can provide multi-rate data information bearer services.

In order to achieve the above object, the technical solution of the present invention is achieved as follows:

The present invention discloses an implementation method for providing a multi-rate data information bearer service, and the method includes:

The calling media gateway control entity MGC controls the calling media gateway MG to create a calling multi-slot logical terminal that performs multi-slot communication with the calling terminal device TE and a calling end network that communicates with the calling multi-slot logical terminal. Protocol IP logical terminal; The calling end MGC triggers the called end MGC to control the called end MG to create a called multi-slot logical terminal that performs multi-slot communication with the called end TE, and a connected terminal that can communicate with the called multi-slot logical terminal Calling the IP logical terminal; and, between the primary and the called IP logical terminals, performing media description information negotiation for supporting communication between the primary and the called TE;

When communicating between the primary and the called TE, the primary/called multi-slot logical terminal receives the multi-slot data from the primary/called terminal TE, converts the multi-slot data into IP data, and sends it to the calling party IP. The logical terminal converts the IP data received by the 3⁄4/calling end IP logical terminal into multi-slot data, and then sends it to the calling terminal TE through the 3⁄4/calling end multi-slot logical terminal.

The method of creating a calling multi-slot logical terminal and a calling end IP logical terminal is performed after the MGC receives the service request from the calling end TE. The process in which the calling end MGC controls the calling end MG to create the calling end multi-slot logical terminal and the calling end IP logical terminal includes:

The calling end MGC sends a calling party multi-rate communication connection creation request to the calling end MG, and the calling end MG creates the calling end TE subscriber line port identifier and the number of time slots included in the request according to the calling end multi-rate communication connection creation request. Creating, by the calling end TE, a calling end multi-slot logical terminal supporting the number of time slots and a calling end IP logical terminal communicating with the called end MG through the IP network;

A communication association is performed between the multi-slot logical terminal at the calling end and the IP logical terminal at the calling end. After the calling end multi-slot logical terminal and the calling end IP logical terminal are created, the method further includes:

The calling end MG sends a calling party multi-rate communication connection creation response including at least the calling end IP logical terminal media description information to the calling end MGC.

The process in which the calling end MGC triggers the called end MGC to control the called end MG to create the called end multi-slot logical terminal and the called end IP logical terminal includes:

The calling end MGC sends a multi-rate service invitation to the called end MGC, and the called end MGC sends a called multi-rate communication connection creation request to the called end MG according to the multi-rate service invitation;

The called end MG creates a called terminal TE subscriber line port identifier and a number of time slots included in the request for the called end multi-rate communication connection, and creates a called terminal for the called terminal TE to support the number of timeslots. a slotted logical terminal and a called IP logical terminal that communicates with the calling end MG through an IP network;

A communication association is performed between the called multi-slot logical terminal and the called IP logical terminal. After the called end multi-slot logical terminal and the called end IP logical terminal are created, the method further includes:

The called end MG sends a media description of the IP terminal of the called end to the called end MGC. The called end multi-rate communication connection of the information creates a response.

The method for negotiating media description information between the primary and the called IP logical terminals includes:

After the master/called terminal MG creates the master/called party IP logical terminal, the master/called party MGC and the called/called party MGC send the master/called party IP logical terminal media description to the called/calling terminal MG. The information/the calling end MG sets the correspondence between the called IP logical terminal and the calling IP logical terminal in the IP terminal of the called/calling end.

After the master/called terminal MG creates the IP address of the master/called party, according to the communication identifier of the peer MG obtained during the call setup process, the host/called MG directly exchanges the master/called party through the IP network. The IP logical terminal media description information is set between the called end LP logical terminal and the calling end IP logical terminal by the calling/calling end MG in the called/calling end IP logical terminal.

The media description information of the calling IP logical terminal and the called IP logical terminal includes: a media type, a communication port identifier, a bearer protocol, and a media format.

The value of the media type is: an application application indicating that the media type is a high-level application data information; the value of the bearer protocol is: a user datagram protocol UDP; the value of the media format is: a time division multiplexing TDM bearer The media encapsulation format tdmoip on the Internet Protocol IP.

The calling end TE and/or the called end TE are an integrated service data network ISDN TE.

The calling end MG and/or the called end MG are an access media gateway AG, or a relay media gateway TMG, or an integrated access device IAD.

The communication device in the public switched telephone network PSTN or ISDN is further connected between the master/called terminal MG and/or the master/called terminal MGC and the TE of the corresponding calling terminal. The invention also discloses a system for providing a multi-rate data information bearer service, the system comprising: a calling end MGC, a called end MGC, a calling end MG and a called end MG;

The calling end MGC is configured to control the calling end MG to create a calling multi-slot logical terminal that performs multi-slot communication with the calling end TE, and a calling end IP logical terminal that communicates with the calling end multi-slot logical terminal, The method further comprises: triggering the called end MGC to control the called end MG to create a called multi-slot logical terminal that performs multi-slot communication with the called end TE, and a called end IP logical terminal that can communicate with the called end multi-slot logical terminal;

The called end MGC is configured to control the called end MG to create the called multi-slot logical terminal and the called end IP logical terminal according to the trigger of the calling end MGC;

The calling end MG is used for controlling the calling end MGC, and creating the calling end multi-time slot logical terminal and the calling end IP logical terminal;

The called end MG is configured to create the called multi-time slot logical terminal and the called end IP logical terminal according to the control of the called end MGC.

The primary and the called IP logical terminal are configured to perform media description information negotiation for supporting communication between the primary and the called TEs before the communication.

The master/called end multi-slot logical terminal is configured to receive the multi-slot data from the master/called terminal TE, convert the multi-slot data into IP data, and send the multi-slot data to the calling end IP logical terminal.

The primary/called IP logical terminal is configured to convert the received IP data into multi-slot data, and then send it to the calling/called TE through the primary/called multi-slot logical terminal.

The calling end TE and/or the called end TE are ISDN TE.

The calling end MG and/or the called end MG are an AG, or a TMG, or an IAD. The primary/called terminal MG and/or the primary/called terminal MGC and the TE of the corresponding calling end are further connected with a communication device in the PSTN or ISDN.

The present invention also discloses an MG, which includes a logical terminal creation entity, a multi-slot logical terminal, and a calling IP logical terminal; The logical terminal creation entity is configured to establish a multi-slot logical terminal and an IP logical terminal having an association relationship according to the control of the MGC;

a multi-slot logical terminal, configured to convert multi-slot data from the TE into IP data and send the data to the IP logical terminal; and receive the multi-slot data from the IP logical terminal and send the data to the TE;

The IP logical terminal is configured to perform media description information negotiation with the peer IP logical terminal to be communicated; and send the multi-slot data from the multi-slot logical terminal to the peer IP logical terminal, and the IP data from the opposite IP logical terminal. The conversion to multi-slot data is sent to the multi-slot logic terminal.

Compared with the prior art, the method, system and device for implementing the multi-rate data information bearer service provided by the present invention create a calling multi-slot logical terminal and a calling IP logical terminal in the calling end MG. The called end MG creates a called multi-slot logical terminal, a called end IP logical terminal, and a media description information negotiation between the primary and the called end IP logical terminals, and finally can ensure that the NGN is the primary and the called end TE is provided. Multi-rate data information bears services. The provision of multi-rate data information bearer services in NGN can assist networks such as ISDN to evolve to NGN, improve user satisfaction, and improve the competitiveness of network providers and service providers. BRIEF DESCRIPTION OF THE DRAWINGS

1 is a schematic diagram of an implementation of a multi-rate data information bearer service provided by an NGN according to a preferred embodiment of the present invention;

2 is a schematic diagram of an implementation of an NGN providing a multi-rate data information bearer service according to another preferred embodiment of the present invention;

FIG. 3 is a flowchart of a multi-rate data information bearer service provided by an NGN according to a preferred embodiment of the present invention. ' Mode for carrying out the invention'

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

The method for implementing the multi-rate data information bearer service provided by the present invention controls the calling end MG to establish a calling multi-slot logical terminal and a calling end IP logical terminal by the calling end MGC; the calling end MGC triggers the called end MGC control The called end MG creates a multi-slot logical terminal and a called end IP logical terminal at the called end; the media description information for supporting the communication between the primary and the called end TE is performed between the primary and the called IP logical terminals; the primary and the called end In TE communication, the master/called multi-slot logical terminal receives multi-slot data from the master/called TE, converts the multi-slot data into IP data, and sends it to the 3⁄4/calling IP logical terminal, and will be / The IP data received by the calling end IP logical terminal is converted into multi-slot data, and then sent to the calling end TE through the 3⁄4 / calling multi-slot logical terminal.

The system for providing multi-rate data information bearer services provided by the present invention includes: a calling end MGC, a called end MGC, a calling end MG, and a called end MG;

'where the calling end MGC is used to control the calling end MG to create a calling multi-slot logical terminal that performs multi-slot communication with the calling end TE and a calling end IP logical terminal that communicates with the calling end multi-slot logical terminal. The method is further configured to trigger the called end MGC to control the called end MG to create a called multi-slot logical terminal that performs multi-slot communication with the called end TE, and a called end IP logical terminal that can communicate with the called multi-slot logical terminal. The called end MGC is configured to control the called end MG to create the called multi-slot logical terminal and the called end IP logical terminal according to the trigger of the calling end MGC; the calling end MG is used for the calling end MG The control of the called MGC, the calling end multi-slot logical terminal and the calling end IP logical terminal; the called end MG, configured to create the called multi-slot logical terminal according to the control of the called end MGC The called end IP logical terminal.

The apparatus MG for providing a multi-rate data information bearer service provided by the present invention includes: a logical terminal creation entity, a multi-slot logical terminal, and a calling end IP logical terminal; wherein, the logical terminal Creating an entity, configured to establish a multi-slot logical terminal and an IP logical terminal having an association relationship according to the control of the MGC; and a multi-slot logical terminal, configured to convert the multi-slot data from the TE into IP data and send the data to the IP logical terminal; Multi-slot data from the IP logical terminal is sent to the TE; the IP logical terminal is used for media description information negotiation with the peer IP logical terminal to be communicated; and the multi-slot data from the multi-slot logical terminal is also sent to the peer IP The logical terminal converts the IP data from the peer IP logical terminal into multi-slot data and sends it to the multi-slot logical terminal.

Referring to FIG. 1, FIG. 1 is a schematic diagram of an implementation of a multi-rate data information bearer service provided by an NGN according to a preferred embodiment of the present invention. The calling end MGC 102 is connected to the calling end TE 101 and the calling end MG 103 respectively, and the calling end TE 101 is connected to the calling end MG 103; the called end MGC 105 and the called end TE 106 and the called end respectively The terminal MG 104 is connected, and the called end TE 106 is connected to the called end MG 104; the calling end MG 103 and the called end MG 104 are connected through an IP network. The foregoing calling end TE 101 and the called end TE 106 may be an ISDN terminal or other communication terminal as long as the communication terminal can support multi-rate communication. The dashed line in Figure 1 represents the signalling connection.

When the calling end TE 101 is to perform multi-rate communication with the called end TE 106, the calling end TE 101 sends a multi-rate service request to the calling end MGC 102, where the service request carries a service type to describe the service request for The multi-rate information bearer service includes at least the user identifier of the calling end TE 101, the user label of the called end TE 106, and the bearer service rate requirement for communication. The multi-rate service request may be sent directly in the manner of Q.931 signaling in Digital Subscriber Signalling #1 (DSS1).

The calling end MGC 102 receives the multi-rate service request from the calling end TE 101, and after reading the service type included in the request, it is learned that the calling end TE 101 applies for the multi-rate data information bearer service, and then the calling end TE 101 a Call Proceeding message to inform the calling end TE 101 that its multi-rate service request is being processed; and, the calling party The end MGC 102 also sends a calling end multi-rate communication connection creation request to the calling end MG 103, which typically includes the subscriber line port identification of the calling end TE 101 and the number of time slots for communication. The calling end multi-rate communication connection creation request may be directly sent in the manner of the prior art H.248 signaling.

After the calling end MG 103 receives the calling end multi-rate communication connection creation request from the calling end MGC 102, it only identifies the subscriber line port identifier of the calling end TE 101 included in the request and the time slot for communication. The number, the calling end TE 101 creates a calling end IP logical terminal 103b that can support the number of time slot communications. Moreover, the calling end MG 103 further performs communication association between the calling end multi-slot logical terminal 103a and the calling end IP logical terminal 103b in such a manner as to set a correspondence relationship, so that the calling end multi-slot logical terminal 103a and the calling party Communication data between the calling end TE 101 and the called TE 106 may be transmitted between the end IP logical terminals 103b.

Certainly, in order to implement data transmission between the calling multi-slot logical terminal 103a and the calling IP logical terminal 103b, it is also ensured that the calling multi-slot logical terminal 103a and the calling IP logical terminal 103b can implement data bearer. Type conversion, ie: The calling end MG 103 can convert the multi-slot data from the calling end TE 101 on the calling end multi-slot logical terminal 103a into an IP data packet and send it to the calling end IP logical terminal 103b for the calling party. The IP logical terminal 103b transmits the IP data packet to the called end MG 104 via the IP network. Similarly, the calling end MG 103 can convert the IP data packet from the called end MG 104 on the calling end IP logical terminal 103b. The multi-slot data is transmitted to the calling multi-slot logical terminal 103a so that the calling multi-slot logical terminal 103a transmits the multi-slot data to the calling terminal TE 101.

There are various data bearing type conversion methods, and a data bearer type conversion method for converting from multi-slot data to IP data packet described in the standard manuscript Y.tdmip developed by the International Telecommunication Union Telecommunication Standardization Organization (ITU-T) For example: Calling end multi-slot logical terminal When the multi-slot data is received, the bit stream of the first time slot of the multi-slot data is formed into a first byte, and the bit stream of the second time slot of the multi-slot data is formed into a second byte, and so on. Until the bit stream of the last time slot of the multi-slot data is formed into the last byte, the constituent bytes are composed into data frames. In turn, data header information can be added to the composed data frame and packaged into an IP data packet. Accordingly, the method of converting from IP data packets to multi-slot data is contrary to the above-described operation flow from multi-slot data to IP packet conversion method.

Further, a media description is required when the calling IP logical terminal 103b is created. The media description information used to describe the IP logical terminal includes: a media type, a communication port identifier, a bearer protocol, and a media format. It can be seen that the purpose of the media description is to clarify the media description information such as the media type, the communication port identifier, the bearer protocol, and the media format that the calling IP logical terminal 103b provides for the multi-rate data information bearer service.

The prior art communication protocol only defines the basic format of the media description information including the media type, the communication port identifier, the bearer protocol, and the media format, and does not define a specific media description that can support the multi-rate data information bearer service in the NGN. The value of the information, so there is currently no media description information necessary for the calling IP logical terminal 103b to support the multi-rate data information bearer service. In view of this, the media description information necessary for the multi-rate data information bearer service is required to be set in advance, for example, the value of the media type is defined as an application, to indicate that the media type is High-level application data information; if data transmission is performed using User Datagram Protocol (UDP), a value can be taken from 1024 to 65535 according to the usage of the local gateway port; if data transmission is performed using UDP, the value of the bearer protocol can be used. Defined as UDP; defines the value of the media format as the media encapsulation format (tdmoip) carried by the time division multiplexing (TDM) on the IP.

According to the specification of the Session Description Protocol (SDP), the newly defined tdmoip in the media format is registered through the Internet Work Task Force (IETF) and becomes a legal media format. Moreover, the media description information is preferably recognized by an IP logical terminal that supports the multi-rate data information bearer service, that is, different IP logical terminals supporting the multi-rate data information bearer service have the same media type and bearer protocol respectively. , media format.

Of course, when using the data encapsulation method, the defined media description information needs to be adjusted accordingly.

After the calling end MG 103 creates the calling end multi-slot logical terminal 103a and the calling end IP logical terminal 103b, it sends a calling end multi-rate communication connection creation response to the calling end VIGC 102, and the response includes at least the main The media description information of the IP logical terminal 103b is called. After receiving the response of the calling end multi-rate communication connection, the calling end MGC 102 sends a multi-rate service invitation to the called end MGC 105 serving the called end TE 106 to inform the called end that the MGC 105 is currently providing The multi-rate data information bearer service, the multi-rate service invitation includes at least the media description information of the calling end IP logical terminal 103b, the bearer service rate requirement for communication, the calling end TE 101 user identifier, and the called end TE 106 user identifier. . The multi-rate service invitation can be sent directly in the form of a prior art SIP Invite.

After receiving the multi-rate service invitation from the calling end MGC 102, the called end MGC 105 sends a called multi-rate communication connection creation request to the called end MG 104, where the request usually includes the subscriber line of the called end TE 106. The port identification, the number of time slots used for communication, and the media description information of the calling end IP logical terminal 103b. The called multi-rate communication connection creation request may be directly sent in the manner of the prior art H.248 signaling.

After the called end MG 104 receives the called end multi-rate communication connection creation request from the called end MGC 105, according to the subscriber line port identifier of the called end TE 106 included in the request, and the number of time slots used for communication, A called end multi-slot logical terminal 104b that can support the number of time slots and a called IP logical terminal 104a that can communicate with the calling end MG 103 over an IP network is created for the called end TE 106. Moreover, the called end MG 104 also needs to set the correspondence relationship and the like at the called end multi-slot logical terminal 104b and the called end IP logical terminal 104a. The communication association is performed so that the communication data of the calling end TE 101 and the called end TE 106 can be transmitted between the called end multi-slot logical terminal 104b and the called end IP logical terminal 104a.

Of course, in order to realize data transmission between the called multi-slot logical terminal 104b and the called IP logical terminal 101⁄2, it is also ensured that the called multi-slot logical terminal 104b and the called IP logical terminal 104a can implement data bearer. Type conversion, that is, the called end MG 104 can convert the multi-slot data from the called end TE 106 on the called multi-slot logical terminal 104b into an IP data packet and send it to the called end IP logical terminal 104a for the called party. The IP logical terminal 104a transmits the IP data packet to the calling end MG 103 via the IP network. Similarly, the called end MG 104 can convert the IP data packet from the calling end MG 103 on the called IP logical terminal 104a. The multi-slot data is transmitted to the called multi-slot logical terminal 104b, so that the called multi-slot logical terminal 104b transmits the multi-slot data to the called TE 106.

A media description is also required when the called IP logical terminal 104a is created. The media description information used to describe the IP logical terminal includes: a media type, a communication port identifier, a bearer protocol, and a media format. The specific media description method is the same as the corresponding media description method of the foregoing IP logical terminal 103b. It can be seen that the purpose of the media description is to clarify the media description information such as the media type, the communication port identifier, the bearer protocol, and the media format that the called IP logical terminal 104a provides for the multi-rate data information bearer service. Moreover, since the media description information of the calling end IP logical terminal 103b received by the called end MG 104 includes the communication port identifier of the calling end IP logical terminal 103b, the called end MG 104 can be at the called end IP logical terminal 104a. The correspondence between the called IP logical terminal 104a and the calling IP logical terminal 103b is set to ensure that the called IP logical terminal 104a sends data to the calling IP logical terminal 103b; and receives the IP from the calling end. The data of the logical terminal 103b.

When the called end MG 104 creates the called end multi-slot logical terminal 104b and the called end IP After the logical terminal 104a, the called end multi-rate communication connection creation response is sent to the called end MGC 105, and the response includes at least the media description information of the called end IP logical terminal 104a. After receiving the response of the called end multi-rate communication connection, the called end MGC 105 sends a multi-rate bearer information service call request to the called end TE 106, and sends a call attempt (100 Trying) message to the calling end MGC 102. If the called TE 106 accepts the multi-rate bearer information service call request from the called end MGC 105, the called end TE 106 sends a call acceptance confirmation to the called end MGC 105.

After receiving the call acceptance confirmation from the called TE 106, the called end MGC 105 sends the media description information of the called IP logical terminal 104a to the calling end MGC 102. The calling end MGC 102 transmits the received media description information of the called IP logical terminal 104a to the calling end MG 103. Since the media description information of the called IP logical terminal 104a received by the calling end MG 103 includes the communication port identifier of the called IP logical terminal 104a, the calling end MG 103 can be set in the calling IP logical terminal 103b. Correspondence between the calling end IP logical terminal 103b and the received called IP logical terminal 104a to ensure that the calling IP logical terminal 103b sends data to the called IP logical terminal 104a; and receives from the called end The data of the IP logical terminal 104a.

After the calling end MG 103 sets the corresponding relationship, it sends a complete setup response to the calling end MGC 102, and the calling end MGC 102 sends the multi-rate data information bearer connection establishment success notification to the calling end TE 101 after receiving the response. In order to inform the calling end TE 101 that the normal multi-rate bearer service communication can be performed with the called end TE 106; and the calling end MGC 102 also sends a receiving response corresponding to the call acceptance confirmation to the called end MGC 105.

It can be seen from the above that when the calling end TE 101 performs subsequent multi-rate communication with the called end TE 106, the calling end TE 101 transmits its own multi-slot data to the calling end of the calling end MG 103 for a long time. The slot logical terminal 103a, and the calling terminal MG 103 converts the multi-slot data received by the calling end multi-slot logical terminal 103a into an IP data packet and sends it to the calling end IP logic. The terminal 103b, the calling IP logical terminal 103b further transmits the received IP data packet to the called IP logical terminal 104a in the called end MG 104 through the IP network; the called end MG 104 puts the called end IP logical The IP data packet received by the terminal 104a is converted into multi-slot data and sent to the called multi-slot logical terminal 104b, and the converted multi-slot logical terminal 104b transmits the converted multi-slot data to the called terminal TE. 106.

Similarly, the called TE 106 transmits its own multi-slot data to the called multi-slot logical terminal 104b in the called MG 104, and the called end MG 104 receives the called multi-slot logical terminal 104b. The multi-slot data is converted into an IP data packet and sent to the called IP logical terminal 104a, and the called IP logical terminal 104a sends the received IP data packet to the calling end of the calling end MG 103 through the IP network. The IP logical terminal 103b; the calling end MG 103 converts the IP data packet received by the calling end IP logical terminal 103b into multi-slot data, and then sends it to the calling end multi-slot logical terminal 103a, and the calling end multi-slot logical terminal 103a transmits the converted multi-slot data to the calling terminal TE 101.

Typically, the operation of converting IP data packets into multi-slot data can be done by an IP logical terminal.

As can be seen from the above, the calling end MG 103 and the called end MG 104 use the calling end MGC 102 and the called end MGC 105 as an intermediary to perform media description information negotiation, so that the calling end MG 103 learns the called end MG 104. The media description information of the called IP logical terminal 104a is also created, and the called MG 104 is informed of the media description information of the calling IP logical terminal 103b created in the calling MG 103 to ensure the IP data of the calling end. The communication data between the calling end TE 101 and the called end TE 106 can be transmitted between the terminal 103b and the called end IP logical terminal 104a. .

Of course, in the actual application, the media description information negotiation may not be performed by the calling end MGC 102 or the called end MGC 105, but the calling end MG 103 directly passes through the IP network connected to the called end MG 104. The media description information is negotiated with the called end MG 104. in case There are several specific negotiation methods. The overall negotiation principle is as follows: After the primary/called MG creates the primary/called IP logical terminal, the communication is obtained according to the peer MG obtained during the call setup. The identification, the IP address of the active/called IP channel of the master/called terminal is directly exchanged between the MG and the calling MG, and the IP address of the IP address of the called end is set by the MG at the calling/calling end. Correspondence with the calling end IP logical terminal.

The negotiation method is described below with a specific example:

The calling end MGC 102 sends a communication identifier such as an IP address of the calling end MG 103 to the called end MGC 105, and the calling end MGC 102 can carry the communication identifier to the calling end MGC 102 to send to the called end MGC 105. Rate business invitation.

After receiving the communication identifier of the calling end MG 103 from the calling end MGC 102, the called end MGC 105 sends the communication identifier to the called end MG 104, and can carry the communication identifier to the called end MGC 105 to the called party. The called end multi-rate communication connection creation request sent by the end MG 104. After receiving the caller MG 103 communication identifier and creating the called IP logical terminal 104a, the MG 104 sends a media description information negotiation request to the calling MG 103 through the IP network, where the request includes at least the called IP address. The logical terminal 104a media description information.

After receiving the media description information negotiation request, the calling end MG 103 sets the media description information of the called IP logical terminal 104a included in the request in the calling end IP logical terminal 103b created by the calling end MG 103. The correspondence between the calling end IP logical terminal 103b and the received called IP logical terminal 104a. Thereafter, the calling end MG 103 sends a media description information negotiation response to the called end MG 104, where the response includes at least the media information of the calling end IP logical terminal 103b. After receiving the media description information negotiation response, the called end MG 104 sets the correspondence between the called end IP logical terminal 104a and the received calling end IP logical terminal 103b in the called end IP logical terminal 104a.

It can be seen that after the foregoing media description information negotiation is completed, the calling end IP logical terminal 103b Communication data between the calling end TE 101 and the called end TE 106 can be transmitted between the called end IP logical terminal 104a and the called end.

The TE is usually an ISDN TE, and the communication between the primary/called terminal MG and/or the primary/called MGC and the TE of the corresponding calling terminal may be connected to a public switched telephone network (PSTN) or a switch in the ISDN. The device can also be connected to communication devices in other communication networks. And the calling end MGC and/or the called end MGC may be a communication gateway that can implement a media gateway control function, such as an access gateway control function entity (AGCF) or a media gateway control function entity (MGCF); The calling MG and/or the called MG may be an access media gateway (AG) capable of directly accessing the subscriber line, a relay media gateway (TMG) implementing IP and TDM relay interworking, or capable of accessing a small number of subscriber lines. A communication entity such as an integrated access device (IAD) that enables data conversion between TDM and IP.

It should be noted that whether the calling end MG or the called end MG can establish the multi-slot logical terminal and the IP logical terminal according to the control of the corresponding calling end MGC, because the current MG setting is useful. Generating an entity for establishing a multi-slot logical terminal and an IP logical terminal, the logical terminal creation entity capable of establishing a multi-slot logical terminal and an IP logical terminal having an association relationship according to the control of the MGC, and in the subsequent communication process The established multi-slot logical terminal and IP logical terminal are managed.

In the following, the method of the present invention will be simplified by a specific embodiment which is refined on the basis of Fig. 1.

Referring to FIG. 2, FIG. 2 is a schematic diagram of an implementation of a multi-rate data information bearer service provided by an NGN according to another preferred embodiment of the present invention. The illustration shows an ISDN terminal in an NGN and an ISDN terminal in a PSTN/ISDN network. Establish a networking configuration diagram of the ISDN multi-rate data transmission channel. The calling end AGCF 202 is equivalent to the calling end MGC 102 in FIG. 1, the calling end AG 203 is equivalent to the calling end MG 103 in FIG. 1, and the called end MGCF 205 is equivalent to the called end in FIG. MGC 105, called end TMG 204 is equivalent to the quilt in Figure 1. Called MG 104. The dashed line in Figure 2 represents the signalling connection.

Q.931 signaling communication is applied between the calling end TE 201 and the calling end AGCF 202, and the calling end TE 201 and the calling end AG 203 communicate through an ISDN primary group rate interface (PRI), and the calling end AGCF 202 Applying H.248 signaling communication with the calling end AG 203, applying SIP-I signaling communication between the calling end AGCF 202 and the called end MGCF 205, between the called end MGCF 205 and the called end TMG 204 Application H.248 signaling communication, the called end MGCF 205 and the local end office switch PSTN 206 apply ISUP signaling communication, the called end TMG 204 and PSTN 206 communicate through TDM relay, PSTN 206 and called end The TE 207 communicates via ISDN PRI. In practical applications, the PSTN 206 can also be replaced with ISDN.

When the calling end TE 201 is to perform multi-rate communication with the called end TE 207, the calling end TE 201 sends a multi-rate service request to the calling end AGCF 202. After receiving the multi-rate service request, the calling end AGCF 202 sends a Call Proceeding message to the calling end TE 201 to inform the calling end TE 201 that the multi-rate service request is being processed; and the calling end AGCF 202 further A calling party multi-rate communication connection creation request is sent to the calling side AG 203. After the calling end AG 203 receives the calling end multi-rate communication connection creation request, the calling end TE 201 creates a calling end multi-slot logical terminal 203a and a calling end IP logical terminal 203b; and when the calling end is in a multi-time The gap logic terminal 203a is in communication association with the calling end IP logical terminal 203b.

Certainly, in order to implement data transmission between the calling multi-slot logical terminal 203a and the calling IP logical terminal 203b, it is also ensured that the calling multi-slot logical terminal 203a and the calling IP logical terminal 203b can implement data bearer. Type conversion. Furthermore, the media description of the calling terminal IP logical terminal .203b is required.

After the calling end AG 203 creates the calling end multi-slot logical terminal 203a and the calling end IP logical terminal 203b, it sends the calling end multi-rate communication connection response to the calling end AGCF 202. After the calling end AGCF 202 receives the response from the calling end multi-rate communication connection, The multi-rate service invitation is sent to the called end MGCF 205 serving the called end TE 207 to inform the called end MGCF 205 that the multi-rate data information bearer service is currently to be provided. After receiving the multi-rate service invitation, the called MGCF 205 sends a called multi-rate communication connection creation request to the called end TMG 204. After receiving the called multi-rate communication connection creation request, the called end TMG 204 creates a called multi-slot logical terminal 204b and a called IP logical terminal 204a for the called end TE 207; The gap logic terminal 204b is in communication association with the called end IP logical terminal 204a.

Of course, in order to realize data transmission between the called multi-slot logical terminal 204b and the called IP logical terminal 204a, it is also ensured that the called multi-slot logical terminal 204b and the called IP logical terminal 204a can implement data bearer. Type conversion. Further, when the called IP logical terminal 204a is created, a media description is also required.

After the called end TMG 204 creates the called end multi-slot logical terminal 204b and the called end IP logical terminal 204a, it sends a called multi-rate communication connection creation response to the called end MGCF 205. After receiving the response of the called end multi-rate communication connection, the called end MGCF 205 sends a multi-rate bearer information service call request to the called end TE 207 through the PSTN 206, and sends a 100 Trying message to the calling end AGCF 202. If the called end TE 207 accepts the multi-rate bearer information service call request, the called end TE 207 sends a call acceptance confirmation to the called end MGCF 205 through the PSTN 206.

After receiving the call acceptance confirmation, the called end MGCF 205 sends the media description information of the called end IP logical terminal 204a to the calling end AGCF 202. The calling end AGCF 202 transmits the received media description information of the called terminal ΙΡ logical terminal 204a to the calling party AG 203. The calling end AG 203 sets the correspondence between the calling end IP logical terminal 203b and the received called IP logical terminal 204a in the calling end IP logical terminal 203b.

After the calling end AG 203 sets the corresponding relationship, it sends a complete setup response to the calling end AGCF 202, and the calling end AGCF 202 sends the response to the calling end TE 201 after receiving the response. The rate data information carries a connection establishment success notification to inform the calling end TE 201 that normal multi-rate bearer service communication can be performed with the called end TE 207; and the calling end AGCF 202 also sends a call acceptance confirmation to the called end MGCF 205. The corresponding receiving response.

After that, the calling end TE 201 can perform normal multi-rate bearer service communication with the called end TE 207 through the calling end AG 203, the IP network, the called end TMG 204, the PSTN 206/ISDN.

Of course, in the actual application, the media description information negotiation may not be performed by the calling end AGCF 202 or the called end MGCF 205, but the calling end AG 203 directly passes the IP network connected to the called end TMG 204. The media description information is negotiated with the called end TMG 204. If this negotiation mode is applied, the calling AGCF 202 transmits a communication identifier such as an IP address of the calling AG 203 to the called MGCF 205.

After receiving the communication identifier of the calling end AG 203, the called end MGCF 205 sends the communication identifier to the called end TMG 204. After receiving the communication identifier of the calling end AG 203 and creating the called IP logical terminal 204a, the called end TMG 204 sends a media description information negotiation request to the calling end AG 203 through the IP network. After receiving the media description information negotiation request, the calling end AG 203 is set in the calling end IP logical terminal 203b created by the calling end AG 203 according to the media description information of the called end IP logical terminal 204a included in the request. The correspondence between the calling end IP logical terminal 203b and the received called IP logical terminal 204a. Thereafter, the calling side AG 203 sends a media description information negotiation response to the called end TMG 204. After receiving the media description information negotiation response, the called end TMG 204 sets the correspondence between the called end IP logical terminal 204a and the received calling end IP logical terminal 203b in the called end IP logical terminal 204a.

It can be seen that, after the media description information negotiation is completed, the communication data between the calling end IP logical terminal 203b and the called end IP logical terminal 204a can be exchanged between the calling end TE 201 and the called end TE 207. The principle shown in FIG. 2 can be described in the flow chart shown in FIG. 3. The flow in FIG. 3 includes the following steps:

Step 301: The calling end TE sends a multi-rate service request to the calling end AGCF.

Step 302: The calling end AGCF sends a call progress message to the calling end TE.

Step 303: The calling end AGCF sends a calling party multi-rate communication connection creation request to the calling end AG.

There is no fixed sequence between step 302 and step 303.

Step 304: The calling end AG creates a calling multi-slot logical terminal and a calling IP logical terminal for the calling TE, and performs communication association between the calling multi-slot logical terminal and the calling IP logical terminal. Of course, a media description is required when creating a calling IP logical terminal. After the calling end AG creates the calling multi-slot logical terminal and the calling IP logical terminal, it sends a calling multi-rate communication connection creation response to the calling AGCF.

Step 305: The calling end AGCF sends a multi-rate service invitation to the called end MGCF serving the called end TE.

Step 306: The called end MGCF sends a called end multi-rate communication connection creation request to the called end TMG.

Step 307: The called end TMG creates a called multi-slot logical terminal and a called end IP' logical terminal for the called end TE, and performs communication association between the called multi-slot logical terminal and the called end IP logical terminal. . Of course, the media description of the called IP logical terminal is also required.

After the called end TMG creates the called multi-slot logical terminal and the called IP logical terminal, it sends a called multi-rate communication connection creation response to the called end MGCF.

Step 308: The called end MGCF sends a multi-rate bearer information service call request to the called end TE through the PSTN. Of course, if the PSTN is replaced with the ISDN, the called end MGCF sends the multi-rate bearer information to the called end TE through the ISDN. Business call request. Step 309: The called end MGCF sends a call attempt message to the calling end AGCF.

There is no fixed sequence between step 308 and step 309.

Step 310: The called TE sends a call acceptance confirmation to the called MGCF through the PSTN. Of course, if the PSTN is replaced with the ISDN, the called TE sends the call acceptance confirmation to the called MGCF through the ISDN.

Step 311: The called end MGCF carries the media description information of the called end IP logical terminal in the 200 OK message and sends it to the calling end AGCF.

Step 312: The calling end AGCF generates a transmission request (T-Req), and carries the received media description information of the called end IP logical terminal in the T-Req, and sends the information to the calling end AG. Step 313: The calling end AG sets a correspondence between the calling end IP logical terminal and the received IP logical terminal included in the received T-Req in the calling end IP logical terminal, and sets the corresponding correspondence. The relationship sends a completion setup response (T-Reply) corresponding to the received T-Req to the calling AGCF.

Step 314: The calling end AGCF sends a multi-rate data information bearer connection establishment success notification to the calling end TE.

Step 315: The calling end AGCF sends a receiving response (ACK) corresponding to the call acceptance confirmation to the called end MGCF.

After that, the calling end TE can perform normal multi-rate bearer service communication with the called end TE through the calling end AG, the IP network, the called end TMG, the PSTN/ISDN.

It can be seen from the above that the method, system and device for implementing the multi-rate data information bearer service provided by the present invention enable the NGN that is separated from the bearer and uses the DP bearer to provide multi-rate data information bearer services. The provision of multi-rate data information bearer services in NGN can assist networks such as ISDN to evolve to NGN, improve user satisfaction, and improve the competitiveness of network providers and service providers.

Claims

Claim '

An implementation method for providing a multi-rate data information bearer service, the method comprising:

When communicating between the primary and the called TE, the primary/called multi-slot logical terminal receives the multi-slot data from the primary/called terminal TE, converts the multi-slot data into IP data, and sends it to the called/calling end. The IP logical terminal converts the IP data received by the 3⁄4/calling end IP logical terminal into multi-slot data, and then sends it to the calling end TE through the multi-slot logical terminal of the calling/calling end.

The method according to claim 1, wherein the creating a calling multi-slot logical terminal and a calling IP logical terminal are performed after the MGC receives a service request from the calling TE.

The method according to claim 1 or 2, wherein the process of the calling end MGC controlling the calling end MG to create the calling end multi-slot logical terminal and the calling end IP logical terminal comprises:

The calling end MGC sends a calling party multi-rate communication connection creation request to the calling end MG, and the calling end MG creates the calling end TE subscriber line port identifier and the number of time slots included in the request according to the calling end multi-rate communication connection creation request. Creating a calling terminal multi-slot logical terminal supporting the number of time slots and calling party IP VoIP communicating with the called MG through the IP network Terminal

A communication association is performed between the multi-slot logical terminal at the calling end and the IP logical terminal at the calling end.

The method of claim 3, wherein after the calling end multi-slot logic terminal and the calling end IP logical terminal are created, the method further comprises:

5. The method according to claim 1, wherein the process in which the calling end MGC triggers the called end MGC to control the called end MG to create the called multi-slot logical terminal and the called end IP logical terminal includes:

A communication association is performed between the called multi-slot logical terminal and the called IP logical terminal.

The method according to claim 5, wherein after the called end multi-slot logic terminal and the called end IP logical terminal are created, the method further comprises:

The called end MG sends a called multi-rate communication connection creation response including at least the media description information of the called end IP logical terminal to the called end MGC.

The method according to claim 1, 2 or 5, wherein the method for negotiating media description information between the primary and the called IP logical terminals comprises:

After the master/called terminal MG creates the primary/called IP logical terminal, the master/called terminal MGC and the calling end MGC send the primary/called IP logical terminal media to the 3⁄4/calling MG. Descriptive information, the connected/calling end MG sets the correspondence between the called IP logical terminal and the calling IP logical terminal in the IP terminal of the called/calling end.

The method according to claim 1, 2 or 5, wherein the method for media information negotiation between the primary and the called IP logical terminals comprises:

After the master/called terminal MG creates the primary/called IP logical terminal, according to the communication identifier of the peer MG obtained during the call setup process, the primary/called terminal is directly exchanged between the calling and the MG through the IP network. IP logical terminal media description information, ^L/calling end MG sets the correspondence between the called IP logical terminal and the calling IP logical terminal in the ^ / calling IP logical terminal.

The method according to claim 1, wherein the media description information of the calling end IP logical terminal and the called end IP logical terminal comprises: a media type, a communication port identifier, a bearer protocol, and a media format.

The method according to claim 9, wherein the value of the media type is: an application application indicating that the media type is a high-level application data information; the value of the bearer protocol is: a user datagram protocol UDP The value of the media format is: The time division multiplexing TDM bears the media encapsulation format tdmoip on the Internet Protocol IP.

The method according to claim 1, 2 or 5, wherein the calling end TE and/or the called end TE are an integrated service data network ISDN TE.

The method according to claim 1, 2 or 5, wherein the calling end MG and/or the called end MG is an access media gateway AG, or a relay media gateway TMG, or integrated. Access device IAD. '

The method according to claim 1, 2 or 5, wherein the main/called terminal MG and/or the master/called terminal MGC and the TE of the corresponding calling terminal are further connected with a public switched telephone network. Communication equipment in PSTN or ISDN.

14. A system for providing multi-rate data information bearing services, characterized in that the system The system includes: Calling end MGC! , the called end MGC, the calling end MG and the called end MG;

The calling end MG is configured to create, according to the control of the calling end MGC, the calling end multi-time slot logical terminal and the calling end IP logical terminal;

The system according to claim 14, wherein the primary and the called IP logical terminals are configured to perform media description information negotiation for supporting communication between the primary and the called TEs before the communication.

16. A system as claimed in claim 14 or 15, characterized in that:

17. A system according to claim 14 or 15, characterized in that:

The master/called 3⁄4 IP logical terminal is configured to convert the received IP data into multi-slot data, and then send it to the calling/called TE through the master/called multi-slot logical terminal.

18. A system according to claim 14 or 15, characterized in that:

The calling end TE and/or the called end TE are ISDN TE.

19. A system according to claim 14 or claim 15 wherein:

The calling end MG and/or the called end MG is an AG, or a TMG, or an IAD.

The system according to claim 14 or 15, wherein: the primary/called terminal MG and/or the master/called terminal MGC and the TE of the corresponding calling terminal are further connected with the communication in the PST or the ISDN. device.

An MG, where the MG includes a logical terminal creation entity, a multi-time slot logical terminal, and a calling end IP logical terminal;

The logical terminal creation entity is configured to establish a multi-slot logical terminal and an IP logical terminal having an associated relationship according to the control of the MGC;