JP2003152871A - Interlocking device and method for supplementary service between different kinds of communication networks - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an interlocking device and method for a supplementary service between different kinds of communication networks that can provide an inter- supplementary service between the communication networks by interlocking an MSC (Mobile Switching Center) with a signal conversion function and a supplementary service apparatus in the communication networks. SOLUTION: This invention relates to interlocking the different kinds of communication networks, and in more detail, a interlocking device and method to apply a supplementary service between the communication networks. Upon request of the supplementary service based on an opposite network, the interlocking device interconnects the supplementary service apparatus providing the supplementary service based on the opposite network and a line, converts a guide message sent from the supplementary service apparatus into an audio coding system of its own network and transmits the resulting message to a subscriber, converts digit information to control the supplementary service sent from the subscriber receiving the guide message and transmits the converted information in a form of traffic message recognizable by the supplementary service apparatus.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a heterogeneous device.
The present invention relates to interworking between communication networks, and more particularly, to a linking device and method for providing additional services between heterogeneous communication networks.

[0002]

2. Description of the Related Art Conventionally, time division multiplexing (Time Div)
In the configuration of the infrastructure communication network (hereinafter, abbreviated as TDM), as shown in FIG. 13, mobile communication subscribers have two generations (generation).
Alternatively, a mobile station 10 for providing a 2.5 generation mobile service, and a base station (Base Station Sub) performing a radio interface with the mobile station 10.
A system, hereinafter abbreviated as BSS) 20, and a base station controller (Base S) for controlling the base station 20.
station controller (hereinafter abbreviated as BSC) 30 and a mobile switching center (Mobile S) that processes mobile calls transmitted from the base station controller 30.
Witching Center; hereinafter abbreviated as MSC) 40, and an additional service device (Su) for providing an additional service by being connected to the exchange 40 and the TDM system.
ppplementary Service Appar
atus; hereinafter, abbreviated as SSA) 50.

At this time, the base station controller 30 and the M
Physical connection between SC40 (physical conn)
section is a circuit connection (circu) based on TDM.
It is configured in the it based connection system, and each network element forming a TDM-based communication network is also interconnected based on the TDM.

Hereinafter, an additional service method of the TDM-based communication network configured as described above will be described.

As an example of the supplementary service, the mobile communication subscriber uses an automatic response service (Automatic Resp).
Once the mobile communication subscriber should try the ARS, the mobile communication subscriber should try the ARS. Must enter the requirements for the automatic answering service through the mobile terminal 10. Next, the mobile terminal 10 forms signal information (digit information) corresponding to the input requirements, and the formed signal information is transmitted by the MSC 40 to a dual tone multi frequency (Dual Tone M).
multi-frequency (abbreviated as DTMF) signal and transmitted to the supplementary service device 50 through the TDM-based line connection.
Provides the mobile service subscriber with the above supplementary service by the received DTMF signal.

[0006] Next, when the ARS is tested by the mobile terminal 10, the ARS sends the No. up to the MSC 40 through the BSC 30 through the TDM based line. 7 is transmitted in the form of a 7-message message. Signal matching is performed with the supplementary service device 50 in the 7-signal system to form a voice transmission path for providing ARS.

In the DTMF signal transmission method of the TDM-based communication network, as shown in FIG. 15, a voice transmission path for providing ARS is formed, and the mobile communication subscriber transmits from the supplementary service device 50. This announcement broadcast (Announcement Broadcast)
ing), the mobile communication subscriber transmits the signal information of the requirement for the ARS to the supplementary service device 50, so that the corresponding key (ke) of the mobile terminal 10 in the talking state is transmitted.
Press y) to select the desired dial information (S1)
1).

Then, the mobile terminal 10 sends the digit information corresponding to the selected dial information to the signal channel of the wireless section.
channel) to the base station 20 and the BSC 30 (S12).

Then, through the signal channel, BS
The signaling message received by C30 is No. It is transmitted to the corresponding supplementary service device 50 through the MSC 40 through a 7-signal message form. At this time, the method of transmitting the signal information to the supplementary service device 50 differs depending on whether the BSC 30 or the MSC 40 includes the function of converting the signal information into the DTMF signal. , DTMF conversion function MSC40
(Or Core Network;
Consider the case in which CN) is included.

Then, No. The BSC 30 which has received the signal information in the form of a 7-signal message has the received No.
7 Signal message to MS through TDM-based line connection
It is transmitted to C40 (S13).

Next, the MSC 40 is No. The signal information of the mobile terminal 10 received in the 7-signal message format is analyzed to form a line connection between the corresponding supplementary service device 50 and the TDM base (S14). At this time, the above MSC
The TDM-based line connection between the 40 and the supplementary service device 50 is a line connection for a traffic channel, and the audio coding method of the traffic channel is pulse code modulation (Pulse Code).
d Modulation; hereinafter abbreviated as PCM) method is used.

Therefore, the MSC 40 converts the signal information received from the mobile communication subscriber into a DTMF signal (S15), and then, through the TDM-based line connection, the DTM.
The F signal is transmitted to the supplementary service device 50 by the PCM method (S16).

Next, the supplementary service apparatus 50 analyzes the received DTMF signal by the PCM method and finally analyzes the signal information required by the mobile terminal 10 to provide the supplementary service desired by the mobile communication subscriber. (S17).

As described above, in the TDM-based communication network, in order to provide the supplementary service in accordance with the requirements of the mobile communication subscriber, a signal for controlling the supplementary service in a state in which calls for the supplementary service are connected. The information is transmitted in the form of signaling messages between the mobile terminal and the MSC,
Between the C and the supplementary service device, the PCM audio coding system (64 Kbps bandwidth) traffic is transmitted. Accordingly, the TDM-based communication network converts the digit information of the mobile terminal into a DTMF signal and then connects the DTM through the line connection with the TDM base with the supplementary service device.
Transmits the F signal.

[0015]

However, in the conventional TDM-based communication network, when the mobile communication network is configured as an ATM-based communication network that is not TDM-based PCM connection, it is received from the mobile communication subscriber. The MSC and A to which the DTMF signal conversion device is connected in order to transmit the received signal.
There is an inconvenience that a line connection method (interconnection method) adapted to the ATM network is required between the additional service devices connected to the TM-based mobile communication network.

Further, in the conventional ATM-based mobile communication network, the audio coding method for connecting the traffic between the MSC to which the DTMF signal converter is connected and the supplementary service device is 3GPP (3rd Generati).
AMR (Adaptive Multi) recommended by on Partnership Project
i-Rate). However, the AMR audio coding scheme has a low bandwidth (4.75 to 1).
However, the AMR audio coding method has a disadvantage that the DTMF signal is not accurately transmitted. (Internationala
l Telecommunications Unio
n-Telecommunication Secto
r (ITU-T) Recommendation I.r. 366.2 ANNEX
K). Therefore, DTMF is used in an ATM-based mobile communication network.
What is needed is a signaling method that can accurately deliver signals.

Further, in order to provide mutual supplementary service between mutually different communication networks, a signal message matching method for providing supplementary service between different communication networks is required.

That is, since the mobile communication subscriber of the TDM-based communication network can receive the additional service through the additional service device connected to the ATM-based communication network, the mobile communication subscriber of the ATM-based communication network is also provided. When the user wants to receive the supplementary service through the supplementary service device connected to the TDM-based communication network, a signal message matching method for providing the supplementary service between the TDM-based communication network and the ATM-based communication network. Is required.

The present invention has been made in view of the above-mentioned conventional problems, and M having a signal conversion function in a heterogeneous communication network.
SC and supplementary service device interworking (interwo
It is an object of the present invention to provide an interlocking device and a method for providing supplementary services between heterogeneous communication networks, which can provide mutual supplementary services between heterogeneous communication networks.

When a supplementary service is requested in a heterogeneous communication network, the guidance message is converted into the audio coding method and transmitted to the mobile terminal requesting the supplementary service, and a request signal from the mobile terminal is transmitted. And an interlocking device for providing a supplementary service between different communication networks capable of providing a voice-related supplementary service between different communication networks by converting the above into the relevant traffic coding method and transmitting to the above supplementary service device. The purpose is to provide the method.

[0021]

In order to achieve such an object, in the interlocking method for providing the supplementary service between the different types of communication networks according to the present invention, a process of confirming whether or not the supplementary service is requested, It is characterized in that the process of performing voice transmission and conversion according to the request of the supplementary service and the process of implementing the service through the supplementary service device by the voice transmitted from the exchange are sequentially performed.

Further, in the interlocking method for providing the supplementary service between different types of communication networks according to the present invention, a terminal device requesting the supplementary service and a supplementary service apparatus for providing the supplementary service according to the form of the supplementary service requesting side. Process of connecting the voice calls between the terminals, and when the guidance message of the audio coding method adopted by the supplementary service equipment is transmitted from the supplementary service equipment, the guidance of the audio coding scheme adopted by the terminal is carried out. A process of converting a message and transmitting the message to the terminal, and converting digit information for controlling the supplementary service transmitted from the terminal by the guide message into a DTMF signal, and converting the DTMF signal into the supplementary service. The above-mentioned supplementary service is added to the traffic message form that can be recognized by the device. And transmitting the location, the DTM
The additional service device receiving the F signal sequentially performs the process of providing the additional service requested by the terminal based on the DTMF signal.

Further, in the interlocking device for providing the supplementary service between different types of communication networks according to the present invention, the mobile communication network and the supplementary service are provided according to the supplementary service device for providing the supplementary service and the type of the supplementary service requesting side network. And a mobile communication switching center that selectively links service devices.

The interlocking method of the present invention comprises: (A) confirming whether the additional service is requested, (B) performing voice transmission and conversion according to the request of the additional service, and (C) exchanging. The additional service device performs the service by the voice transmitted from the device.

In the step (B), when a supplementary service based on the heterogeneous network is requested (B1), a step of performing voice conversion for interworking with the exchange for which the supplementary service is requested is additionally performed. Be seen.

In the above step (B), when a supplementary service based on the same network (B2) is requested, a step of performing voice message transmission is additionally performed so that the supplementary service is linked to the requested exchange. Done.

In the step (B1), a voice call is connected between the service request switch and the supplementary service device, a guide message is received through the voice call connection, and the guide message is service requested. Converting the message format of the exchange, transmitting the converted message to the service request exchange, receiving digit information for controlling the added service from the service request terminal, Converting the digit information and transmitting it to the supplementary service device through the connection of the voice call.

The guidance message is a PCM coding guidance message.

The digit information is converted into a DTMF signal form.

In the step (B2), a step of connecting the virtual circuit to the supplementary service device to receive the guide message, a step of transmitting the guide message to the service request terminal, and a supplementary service from the service request terminal. The step of receiving the digit information for controlling the number and the step of converting the digit information and transmitting the digit information to the supplementary service device are sequentially performed.

The guidance message is an AMR coding guidance message.

The above digit information is AAL2 DTMF.
Converted to signaling message form.

When a 3G mobile terminal belonging to the ATM-based mobile communication network requests a supplementary service from a supplementary service device belonging to the TDM-based communication network, the MSC of the ATM-based mobile communication network and the above-mentioned TDM-based communication network. In the meantime, a step of connecting a TDM-based voice call using ISUP, a step of connecting a TDM-based voice call between the TDM-based communication network and the supplementary service device, and the supplementary service device The PCM audio coded guidance message from the MS via the TDM-based line
When transmitted to the C, the PCM audio coded guidance message is converted into an AMR audio coded guidance message and then transmitted to the 3G mobile terminal, and the additional service is controlled from the 3G mobile terminal. When the digit information for performing the conversion is received by the MSC, the digit information is converted into a DTMF signal and then transmitted to the supplementary service device through the TDM-based line, and the digit information is received through the TDM-based line. The step of analyzing the DTMF signal and providing the additional service desired by the 3G mobile terminal is sequentially performed.

A terminal belonging to a TDM-based communication network is an AT
When a supplementary service is requested to a supplementary service device belonging to the M-based mobile communication network, the above TDM is performed by using ISUP.
Performing a TDM-based line connection between the base communication network and the MSC connected to the ATM-based mobile communication network,
Connecting the AAL2 virtual circuit between the MSC and the supplementary service device by using B-ISUP and AAL2; and when the MSC receives an AMR audio-coded guidance message from the supplementary service device, the AMR Converting the audio-coded guidance message into a PCM audio-coded guidance message and transmitting the guidance message to the terminal through the TDM-based communication network; and controlling the supplementary service from the terminal receiving the guidance message. Digit information for performing DTM through the above TDM-based line
The step of receiving in the F signal system, and the AA of the DTMF signal
A step of forming an AAL2 DTMF signal message using the SSCF of L2 and then transmitting the message from the MSC to the supplementary service device; and an AA transmitted from the MSC.
When the L2 message is checked and the AAL2 DTMF signal message is detected, the steps of analyzing the DTMF signal and providing the supplementary service desired by the terminal are sequentially performed.

When a 3G mobile terminal belonging to the ATM-based mobile communication network requests a supplementary service from the supplementary service device belonging to the ATM-based mobile communication network, the B-ISUP is used.
And using AAL2 to connect an AAL2 virtual circuit between the MSC and the supplementary service device, and when the supplementary service device transmits an AMR audio-coded guidance message, the 3G mobile terminal through the AAL2 matching. And the digit information for controlling the supplementary service is transmitted from the 3G mobile terminal receiving the guide message, the digit information is converted into a DTMF signal, and then the SAL of AAL2 is transmitted.
Forming an AAL2 DTMF signal message using the SCF and transmitting the message to the supplementary service device;
The AAL2 message transmitted from the MSC is checked, and when the AAL2 DTMF signal message is detected, the DTMF signal is analyzed to provide the supplementary service desired by the 3G mobile terminal.

Performing a voice call connection between the terminal requesting the supplementary service and the supplementary service apparatus providing the supplementary service according to the supplementary service requesting mode; and audio coding adopted by the supplementary service apparatus. When the system guidance message is transmitted from the supplementary service device, converting the guidance message into an audio coding scheme adopted by the terminal and transmitting the guidance message to the terminal, and the guidance message from the terminal to the terminal. Converting the transmitted digit information for controlling the supplementary service into a DTMF signal and transmitting the DTMF signal to the supplementary service device in a traffic message form that the supplementary service device can recognize; The received supplementary service device is the DTM Sequentially performing the steps of providing an additional service to the user equipment requests based on the signal.

The terminal and the supplementary service device are
They can belong to mutually different communication networks.

The interlocking device of the present invention includes a supplementary service device for providing supplementary services, a mobile communication switching center in which the mobile communication network and the supplementary service device are selectively interlocked in accordance with the type of the supplementary service requesting side network, It is an additional service between heterogeneous communication networks characterized by including.

The mobile telecommunication switching center has an AAL2 matching unit for matching a line with a network of the same type according to a request for an additional service, a trunk matching unit for matching a line with a different network according to a request for an additional service, and a service request. And a vocoding unit for converting a voice message to a voice message of a network and interlocking voice messages.

The mobile switching center converts the digit information for controlling the supplementary service transmitted from the mobile terminal into a DTMF signal and then forms an AAL2 signal message, and an AAL2 matching unit and a AAL2 matching unit. An ATM switch for exchanging a message to be exchanged with an ATM, a message switched from the ATM switch is vocoded into an audio coding method used in a TDM-based communication network, and a voice is transmitted from the message transmitted from the TDM-based communication network. A vocoding unit that performs AAL2 matching by separating a signal and a DTMF signal, a DTMF transceiver that transmits and receives a DTMF signal, and a time switch that time-switches a message transmitted and received between the vocoding unit and the DTMF transceiver. , Times above And trunk matching unit for switching messages from the pitch alignment with the TDM based circuit configured to include a respective control unit for controlling the respective components of the mobile services switching center.

The vocoding unit receives the DTM from the speed matching unit that matches the message transmission speed with the time switch and the signal message output from the speed matching unit.
A vocoder for detecting an F signal, controlling voice traffic matching and DTMF signal traffic matching, and converting an AMR audio coded guidance message switched from the ATM switch into a PCM audio coded guidance message; Control, the voice signal is converted into an AAL2 traffic message, and the DTMF signal is converted into an AAL2 signal message.

[0042]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

In the interlocking device for providing a supplementary service between heterogeneous communication networks according to the present invention, as shown in FIG.
And a second communication terminal, and a first communication network and a second communication network that provide additional services based on the first communication network and additional services based on the second communication network in cooperation with each other according to requests from the first and second terminals. And a communication network.

The first communication network is a third generation (3 ge)
(hereinafter, abbreviated as 3G) mobile communication network, and the second communication network includes 2G or 2.5G communication network.

For example, the 3G mobile communication network is an ATM-based mobile communication network, and the 2G or 2.5G communication network is a 2G or 2.5G mobile communication service and ISD.
N (Integrated Services Dig)
In the case of a TDM-based communication network for an IT network service, the first terminal is a 3G mobile communication terminal (Mobile Terminal; hereinafter referred to as M).
100), and the second terminal is 2G
(Or 2.5G) mobile terminal or fixed terminal (Fi
xed Terminal; hereinafter abbreviated as FT) 80
It can be zero.

In addition, the ATM-based mobile communication network includes a Node-B (node-B) 200 that performs a radio interface with the 3G MT 100, and the Node-B 2.
Radio access network controller (Radi
o access Network Control
er; hereinafter abbreviated as RNC) 300, and the above RNC3
00 and ATM connection, and the supplementary service device 500 according to the type of supplementary service requested by the 3G MT 100.
Alternatively, a switching center (MS that operates in conjunction with the TDM-based communication network)
C) 400, and an additional service device (SS) that is connected to the MSC 400 and the ATM system to provide an additional service.
A) 500 and are included.

Further, the node-B 200 and the RNC 30
0 is a radio access network (Radio Access Ne)
(hereinafter, abbreviated as RAN), and the MSC 400 is included in the core network (CN).

In addition, the MSC 400 connects the supplementary service device to the line according to the type of the supplementary service requested, and sends the guide message transmitted from the supplementary service device to the audio system according to the destination. Send to the coding system, D of 3G MT100 above
An FT / 2G MT which performs traffic matching for transmitting a TMF signal and belongs to the TDM-based communication network.
Perform traffic matching for carrying 800 DTMF signals.

The MSC 400 converts the digit information for controlling the supplementary service transmitted from the 3G mobile terminal 100 into a DTMF signal to convert the ATM-based mobile communication network element (RNC 300, supplementary service device 5).
00 etc. and AAL2 (ATMA adaptation)
Layer 2) AAL2 matching unit 410 for performing matching
An ATM switch 420 for ATM exchanging a message transmitted from the AAL2 matching unit 410;
The message switched from the M switch 420 is vocoded into an audio coding method used in a TDM-based communication network, and a voice signal and a DTMF signal are separated from the message transmitted from the TDM-based communication network to perform AAL2 matching. Vocoding unit 430
And MSC400 itself guide broadcasting output function and multi-person (m
A guidance broadcast sending unit / call mixing unit (announce) that provides a simultaneous call function between multi-points
ment unit / call mixer; hereinafter, A
(Abbreviated as NM / CMX) 450, a DTMF transceiver 460 that transmits and receives a DTMF signal, and a time switch 440 that time-switches messages transmitted and received between the vocoding unit 430, the ANM / CMX450 and the DTMF transceiver 460. Time switch 4 above
A trunk matching unit 470 for matching a message switched from 40 with a TDM-based line, and the MSC.
Each controller 415, 42 for controlling each component of 400
5, 435 and 445 are included.

Also, the vocoding unit 430 matches the rate adaptation unit (Rate Adaptation Uni) for matching the message transmission rate with the time switch 440.
t) 433 and the DTMF signal is detected from the signal message output from the speed matching unit 433, the voice traffic matching and the DTMF signal traffic matching are controlled, and the guidance switched by the ATM switch 420 and AMR audio coded. It includes a vocoder 432 for converting a message into a PCM audio coded guidance message, and an AAL2 matching unit 431 for converting a voice signal into an AAL2 traffic message and a DTMF signal into an AAL2 signal message under the control of the vocoder 432. Consists of

In addition, the supplementary service device 500 is a physical layer function unit for physically matching the ATM to the MSC 400.
onunit; hereinafter abbreviated as ATM) 510, 550
And AAL2 matching units 520 and 560 for performing AAL2 matching on the MSC 400, and AAL252.
VOcoder 530 connected to 0 for performing AMR audio incoding / decoding, a guide broadcasting unit 540 connected to the vocoder 530 for performing guide broadcasting for providing audio supplementary service, and the AA
A DTMF transmitting / receiving unit 57 that is connected to L2560 and transmits / receives a DTMF signal for controlling a voice supplementary service.
0 is included.

The TDM-based communication network is an Internet service providing apparatus (Internet Service P) that provides additional services based on the TDM communication network.
a provider; hereinafter abbreviated as ISP) 700, and an I that selectively interlocks with the ATM-based mobile communication network and the ISP 700 depending on the type of requested additional service.
SDN / 2G PLMN (Integrated Se)
rvices Digital Network / 2
Generation Public Land Mo
and a switch (not shown) of the bile Network 600.

Hereinafter, an embodiment for providing a supplementary service between heterogeneous communication networks according to the object of the present invention will be described.

That is, when the supplementary service is requested, the switching center of the network receiving the request confirms whether the supplementary service is requested from the same type of network, and confirms that the supplementary service is requested from the same type of network. Then, the above switching center transmits the voice message transmitted from the supplementary service device to the subscriber,
If it is not the supplementary service requested from the same type of network, the exchange will convert the voice message transmitted from the supplementary service device into a message form that can be recognized by the exchange of the supplementary service requesting network, and then the supplementary service Transmit to request network.

In the method for providing a supplementary service between heterogeneous communication networks according to the present invention, as shown in FIG. 2, when a supplementary service request is received (S2).
0), the network receiving the request determines the type of the requested supplementary service. That is, the network determines whether to request the self-side network-based additional service or the other-side network-based additional service.

Next, when the request for the self-side network base additional service from the self-side network base terminal is received, the network performs a procedure for providing the self-side network base additional service from the relative side network base terminal (S30) ( S40).

When receiving the request for the partner network infrastructure additional service from the own network infrastructure terminal, the network performs a procedure of providing the partner network infrastructure additional service in cooperation with the partner network (S50). (S60).

When the request for the self-side network infrastructure supplementary service is received from the partner network infrastructure terminal, the network receives a request to provide the self-side network infrastructure supplementary service in cooperation with the partner network (S70). ) (S80).

Then, as a first embodiment of the present invention, a method for providing an additional service by linking different types of networks when the own network is an ATM mobile communication network and the other network is a TDM network will be described. Then it looks like this:

That is, the MSC 400 of the ATM mobile communication network
Receives the request for the supplementary service, S20 determines the type of the supplementary service requested.

The requested supplementary service is 3G MT10.
If it is the ATM network-based supplementary service requested by the 0 (S30), the MSC 400 performs a procedure for providing the 3G MT100 with the ATM network-based supplementary service (S4).
0).

The requested supplementary service is 3G MT
If it is a TDM network-based supplementary service requested by the 100 (S50), the MSC 400 operates in conjunction with the TDM network, and
A procedure for providing the DM network-based supplementary service to the 3G MT 100 is performed (S60).

The requested additional service is the ATM network-based additional service requested by the TDM network (S7).
0), the MSC 400 provides an ATM network-based supplementary service to the FT / 2G MT 800 of the TDM network in cooperation with the TDM network (S80).

First, a case where the 3G MT 100 requests an ATM network-based supplementary service will be described.

In FIG. 3, the MSC 400 of the ATM network is 3G.
When a request for an ATM network-based supplementary service is received from the MT 100, a method for providing the supplementary service is shown.

As an example of the ATM network-based additional service, the 3G MT 100 uses voice mailing.
When the service is requested from the ATM network, the MSC 400
After analyzing the signaling message transmitted from the G mobile terminal 100, the supplementary service device belonging to the ATM network (as an example, a voice mailing system (Voice Mail)
ing System; hereinafter abbreviated as VMS)) 50
The connection between 0 and the voice call is performed (S41). That is, as shown in FIG. 4, between the MSC 400 and the supplementary service device 500, a B-ISUP (Broadban) of an ATM-based inter-network signal protocol is provided.
d ISDN User Part) is used to connect the virtual circuits.
At this time, the variables related to the AAL2 are transferred to the MSC 400 so that the traffic to be transferred to the 3G mobile terminal 100 may be transferred to the 3G mobile terminal 100 in the AAL2 message format in the process of connecting the virtual circuit through the B-ISUP signal message.
And the supplementary service device 500, and the signaling message processing for specially connecting the AAL2 voice call is performed by the ITU-T standard Q. It is carried out based on 263.1.

When the voice call between the MSC 400 and the supplementary service device 500 is connected, the supplementary service device 500 is connected.
Sends out a guidance broadcast through the connected communication path.

FIG. 5 is a diagram showing a protocol stack for matching voice traffic between network elements in an ATM network including supplementary service equipment. As shown in the figure, each network element of the ATM network is shown. The physical matching between
An audio coding method such as voice, which is connected based on TM, is AMR presented in the 3GPP standard recommendation.
The voice coding method is adopted. Therefore, when the guide broadcast unit 540 of the supplementary service device 500 outputs the guide broadcast, the vocoder 530 AM-receives the output guide broadcast.
The AMR audio coding guide broadcasting message converted into the R audio coding system is A
After being converted to AAL2 message format by AL2520, it is transmitted to MSC400 via ATM510 (S
42).

Next, the MSC 400 receives and AMs.
R Audio-coded guidance message AA
RNC300 and Node-B20 in L2 message format
After being transmitted to the 3G MT 100 via 0, the mobile communication subscriber listens to the guidance message through the 3G MT 100 (S43). In this way MSC400
Transparently transposes AAL2 voice traffic transmitted from the supplementary service device 500 to the RAN (RNC 300) through AAL2 switching without intermediate conversion.
transmitted). When the mobile communication subscriber receiving the guide message inputs the corresponding digit information through the 3G mobile terminal 100 in order to select an additional service to receive the service, the 3G mobile terminal 1
00 transmits the digit information to the Node-B 200 via the wireless interface,
The signaling message containing the digit information received by the RNC 30 is a signaling message.
It is transmitted to the MSC 400 via 0 (S44).

FIG. 6 shows an ATM network MSC 400 including the supplementary service device 500 and the supplementary service device 500.
A traffic matching protocol stack for transmitting a DTMF signal is displayed between the M receiving the signaling message including the digit information as shown.
SC400 uses the above digit information as AAL2 DTMF.
Preformed AAL converted to signal message form
The data is transmitted to the supplementary service device 500 through the two virtual circuits (S45, S46).

That is, the AAL2 matching unit 41 of the MSC 400
When 0 receives the digit information transmitted from the RNC 300, it reports the reception of the digit information to the controller 415, and the controller 415 determines that the inter-processor communication (Int.
er Processor Communicatio
n; hereinafter, abbreviated as IPC) method
The L2 matching unit 410 is instructed to convert the signal message, and the AAL2 matching unit 410 sends the digit information to DTMF.
Converted to a signal and specified service matching function (Service
Specific Convergence Fun
action; hereinafter abbreviated as SSCF)
After forming the L2 DTMF signal message (S4
0), the AAL2 DTMF signal message is transmitted to the supplementary service device 500 through the AAL2 virtual circuit formed in step S32 (see B in FIG. 1).

ITU-T Recommendation I. According to 366.2,
A traffic message acknowledge signal (signa) is transmitted to an arbitrary AAL2 message by a specific marking of the header of the AAL2 message.
ling) message can be distinguished. Therefore, in the present invention, the DTMF signal is sent to the AAL
When the message is converted into two messages, it is converted into an AAL2 packet type 3 signal message (AAL2 SSCF message; AAL2 signal message) by displaying in the header that it is a signal message.

On the other hand, the supplementary service device 500 uses the MSC
The AAL2 message transmitted from 400 is continuously checked, and when the AAL2 signal message including the DTMF signal is recognized (AAL2 DTMF signal message), the digit information input by the mobile communication subscriber is analyzed and The mobile service subscriber is provided with the supplementary service actually requested by the analyzed digit information (S
47).

In this way, when the 3G mobile communication subscriber requests the supplementary service by the supplementary service device belonging to the ATM mobile communication network, the AAL2 is used by utilizing the B-ISUP between the MSC of the ATM mobile communication network and the supplementary service device. A digit for connecting virtual circuits, transmitting an AMR audio coded guidance message to a 3G mobile communication subscriber side through the connected AAL2 virtual circuit, and controlling an additional service transmitted from the 3G mobile communication subscriber. After converting the information into an AAL2 DTMF signaling message, the AAL2 D through the AAL2 virtual circuit
By transmitting the TMF signal message to the supplementary service device, the ATM mobile communication network can provide the supplementary service desired by the 3G mobile communication subscriber.

Hereinafter, a case where the 3G MT 100 requests an additional service based on the TDM communication network will be described.

FIG. 7 shows the MSC 40 of the ATM mobile communication network.
When 0 receives a request for a supplementary service based on the TDM communication network from the 3G MT 100, a method for providing the supplementary service is displayed. As shown, 3G MT
100 is an additional service device belonging to the TDM-based communication network 600 (for example, an internet service providing device (I
internet Service Provider;
Hereinafter, when a supplementary service is requested to the ISP 700, the MSC 400 of the ATM mobile communication network causes the ISUP
When the TDM-based voice call is connected to the TDM communication network 600 using the SDM (S61), the TDM communication network 600
Is an ISP 700 and a TDM belonging to the TDM communication network 600.
The circuit connection of the base is performed (S62).

FIG. 8 shows an ATM-based mobile communication network and TD.
A voice traffic matching protocol stack between ISPs 700 belonging to the M-based communication network 600 is displayed, and as shown in the figure, the ISP 700 transmits the PCM audio coded guidance message to the concatenated TDM.
M belonging to an ATM-based mobile communication network through the base line
It is transmitted to SC400 (S63).

Then, the MSC 400 uses the vocoder 430 to AMR the PCM audio coded guidance message transmitted through the TDM-based line.
After converting to a coding guidance message, RNC30
0 and Node-B 200 through 3G mobile terminal 100
(S64) (C in FIG. 1).

Next, the mobile communication subscriber who hears the guidance message received by the 3G mobile terminal 100 inputs the supplementary service number call to receive the service by the guidance message, and inputs the corresponding digit information to the MSC 40.
To 0 (S65).

FIG. 9 shows 3G belonging to the ATM mobile communication network.
A signal traffic matching protocol stack for controlling the supplementary service between the mobile terminal and the supplementary service device belonging to the TDM communication network is displayed and, as shown in the figure,
When the digit information is received in the form of a signaling message from the 3G mobile terminal 100, the AAL2 matching unit 410 of the MSC 400 reports the receipt of the signaling message to the controller 415, and the controller 415 controls each controller 425, The digit information DT is sent to the DTMF transmitting / receiving unit 460 via 445.
When instructed to convert to the MF signal, the DTMF transmitting / receiving unit 460 converts the digit information into the DTMF signal (S66), and then transmits the digit information to the TDM-based communication network 600 via the time switch 440 and the trunk matching unit 470. . Then, the DTMF signal passes through the TDM-based line through the TDM-based mobile communication network 600, and then the ISP 70
0 (S67) (D in FIG. 1).

The ISP 700 analyzes the received DTMF signal and provides the service requested by the subscriber of the ATM mobile communication network (S68).

Thus, when a subscriber of the ATM mobile communication network requests a supplementary service from the supplementary service device belonging to the TDM communication network, the MSC of the ATM-based mobile communication network is
The TDM-based communication network and the ISUP are used to perform the TDM-based line connection, the TDM-based communication network connects the TDM-based line to the supplementary service device, and the supplementary service device is connected to the TDM-based line. Transmit a PCM audio coding guide message over the line,
The MSC of the ATM-based mobile communication network converts the guide message of the audio coding method into a guide message of the AMR audio coding method, and then,
After transmitting to the TM-based mobile communication network subscription rule, the supplementary service device converts it to a guidance message and then transmits it to the ATM-based mobile communication network subscriber. Enter the digit information as above M
After the SC converts the signal into the DTMF signal, the signal is transmitted to the supplementary service device using the TDM-based line. Therefore, the subscriber of the ATM-based mobile communication network can use the existing TDM
You can receive additional services provided by the underlying communication network.

Hereinafter, a case where the FT / 2G MT 100 requests an ATM network-based supplementary service will be described.

FT / of TDM communication network of ATM mobile communication network
In the method of providing the supplementary service to the 2G MT800, as shown in FIG. 10, the ISDN / 2G PLM is used.
FT / 2G MT belonging to TDM communication network 600 such as N
800 is an ATM-based voice mailing service (voi
ce mailing service), the exchange of the ISDN / 2G PLMN 600 is
Trial connection of voice call to M mobile communication network.

At this time, the connection between the TDM communication network 600 and the ATM mobile communication network is currently 3GPP and TDM-based PC.
Since it recommends M connection, the connection of voice call is IT
This is performed using the ISUP signal message recommended by UT (S81).

Next, the MSC4 of the ATM mobile communication network
00 is a supplementary service device 500 that provides a service desired by a subscriber of the TDM communication network 600, based on a voice call connection request transmitted from the TDM communication network 600.
Then, the virtual circuit is connected using the B-ISUP signal message based on ATM. At this time, the ITU-T Recommendation Q.3 is used so that the traffic of the ATM mobile communication network is transmitted to the AAL2 message. Traffic is concatenated by the 2630.1 signaling procedure (S82). Then A
The AMR voice vocoder (the vocoder 530 of the supplementary service device 500 and the vocoder 43 of the MSC 400) corresponding to the above-mentioned voice vocoding form in the TM mobile communication network.
2) is selected.

When a voice call between the MSC 400 and the supplementary service device 500 is connected, the supplementary service device 500 is connected.
Sends out a guidance broadcast through the connected communication path.

That is, FIG. 11 shows a protocol stack for matching voice traffic between the MSC 400 and the supplementary service device 500 belonging to the ATM-based mobile communication network and the fixed terminal 800 belonging to the TDM-based communication network 600. As shown in the figure, the supplementary service apparatus 500 forms the PCM type guidance message into the guidance message of the AMR audio coding method, and then sends the MSC4 through the AAL2520 and the ATM510.
00 (S83).

Then, the vocoding unit 430 of the MSC 400 converts the AMR audio coded guidance message into a PCM audio coded guidance message, and the PCM audio coded guidance message is converted into a time switch 440 and a trunk matching unit 470. And is transmitted to the TDM communication network 600 (S84).

Next, the TDM communication network 600 transmits the PCM audio-coded guidance message transmitted from the MSC 400 of the ATM mobile communication network to the FT / 2G M.
It is transmitted to T800 (E in FIG. 1).

Next, the subscribers of the TDM communication network 600
Additional service device 500 connected to ATM mobile communication network
The digit information for controlling the desired service is transmitted by the voice mailing service guide broadcast transmitted from
Transmitting to the DM communication network 600, the exchange of the TDM communication network 600 converts the received digit information into a DTMF signal.

FIG. 12 shows an FT / 2G MT 800 belonging to the TDM communication network 600 and an M belonging to the ATM mobile communication network.
A stack of signaling traffic matching protocols for controlling supplementary services between the SC 400 and the supplementary service device 500 is displayed.

That is, the TDM communication network 600 uses the TDM
The DTMF signal of the PCM type is transmitted to the MSC 400 of the ATM-based mobile communication network through a circuit channel having a 64 Kbps rate of the system (S85), and the ATM mobile communication network transmits the PCM information of the TDM to the voice. If the DTMF signal received on the traffic channel is converted into an unconditional voice signal for the same recognition as the channel, the additional service device 500 cannot recognize the corresponding DTMF signal.

Therefore, the vocoding unit 430 of the MSC 400 according to the present invention distinguishes the voice signal transmitted from the TDM communication network 600 and the DTMF signal (signal for controlling the supplementary service) from the supplementary service apparatus 500.
To transmit.

That is, as shown in FIG.
The vocoding unit 430 of 00 is used for the TDM communication network 6
If the signal transmitted from 00 is an audio signal, the vocoder 432 converts the PCM audio signal into an AMR, and then A
The AL2 matching unit 431 forms an AAL2 traffic message. Then, when the signal transmitted from the TDM communication network 600 is a DTMF signal, the vocoding unit 430 of the MSC 400 analyzes the digit of the DTMF signal, converts the digit into an AAL2 DTMF signal message using SSCF, and adds the message. It is transmitted to the service device 500 (S86). AAL2 DTMF in step S66
Signaling message conversion is based on ITU-T Recommendation I. 366.
It is carried out based on 2.

On the other hand, the supplementary service device 500 which has transmitted the guidance broadcast checks the AAL2 message transmitted from the MSC 400, and when an AAL2 signal message including a DTMF signal which is not a voice signal is recognized, analyzes the DTMF signal. Then, the service desired by the subscriber of the TDM-based communication network 600 is provided (S87) (F in FIG. 1).

As described above, when a subscriber of the TDM communication network requests a service to the supplementary service device belonging to the ATM mobile communication network, IDM is used between the MSC of the ATM mobile communication network and the TDM communication network to perform TDM. B-I is connected between the MSC and the supplementary service device by connecting the base line.
Connect the AAL2 virtual circuit using SUP and AAL2. And after the supplementary service device transmits an AMR audio-coded guidance message to the MSC through the AAL2 virtual circuit, the MSC converts the AMR audio-coded guidance message into a PCM audio-coded guidance message. , The TDM through the TDM-based line
Send to the underlying communication network. Therefore, when a signal (digit information) for controlling a supplementary service is converted into a DTMF signal of a TDM-based communication network and then transmitted to the MSC through the TDM-based line, the MSC causes the DTMF signal to be transmitted. Is converted into an AAL2 signal message and transmitted to the supplementary service device, so that the supplementary service device can provide the supplementary service to the subscriber of the TDM communication network by the DTMF signal transmitted from the TDM communication network. it can.

[0098]

As described above, in the interlocking device and method for providing the supplementary service between different types of communication networks according to the present invention, when the supplementary service is required between different types of communication networks, a guide message is displayed. After converting into an audio coding scheme that can be recognized by the communication network and transmitting the digit information, the digit information transmitted from the mobile communication subscriber is converted into a traffic coding scheme that can be recognized by the communication network and then transmitting the digit code. By transmitting to the supplementary service device, there is an effect that a supplementary service can be provided between different types of communication networks.

Further, in the interlocking device and the method for providing the additional service between the heterogeneous communication networks according to the present invention,
The MSC of the ATM-based mobile communication network performs mutual conversion between the AMR audio-coded guidance message and the PCM audio-coded guidance message, and D
A TMF signal is sent by the network where the supplementary service device is located.
By matching the TM-based line or the TDM-based line, it is possible to provide the additional services provided by the TDM-based mobile communication network to 3G mobile communication subscribers, and the ATM-based mobile communication. There is an effect that the additional service provided by the network can be provided to the subscribers of the TDM-based communication network.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an interlocking device for providing an additional service between heterogeneous communication networks according to the present invention.

FIG. 2 is a flowchart illustrating an interlocking method for providing a supplementary service between heterogeneous communication networks according to the present invention.

FIG. 3 is a flowchart illustrating a method of providing an ATM communication network-based supplementary service to a 3G mobile terminal.

FIG. 4 is an M including a DTMF conversion function of an ATM communication network.
It is the figure which showed the signal matching protocol stack between SC and a supplementary service apparatus.

FIG. 5 is a diagram showing a protocol stack for matching voice traffic between network elements of an ATM-based communication network including supplementary service devices.

FIG. 6 is a diagram showing a traffic matching protocol stack for transmitting a DTMF signal between an MSC of an ATM-based communication network including a supplementary service device and the supplementary service device.

FIG. 7 is a flowchart illustrating a method of providing an additional service based on a TDM communication network to a 3G mobile terminal.

FIG. 8 is a diagram showing a protocol stack for matching voice traffic between an MSC / additional service device belonging to an ATM-based communication network and a TDM-based communication network.

FIG. 9: Fixed terminal and AT belonging to a TDM-based communication network
It is a figure showing a matching protocol stack of signal traffic for controlling a supplementary service between an MSC and a supplementary service device belonging to an M-based communication network.

FIG. 10 is a flowchart illustrating a method of providing an ATM communication network-based supplementary service to a 2G terminal.

FIG. 11 is a diagram showing a voice traffic matching protocol stack between supplementary service devices (ISPs) belonging to an ATM-based communication network and a TDM-based communication network.

FIG. 12 is a diagram showing a matching protocol stack of signal traffic for controlling a supplementary service between a 3G mobile terminal belonging to an ATM-based communication network and a supplementary service device belonging to a TDM-based communication network.

FIG. 13 is a block diagram showing a configuration of a TDM-based communication network.

FIG. 14 is a diagram showing a structure of a protocol stack for matching signals between an MSC and a supplementary service device of a TDM-based communication network.

FIG. 15 is a flowchart showing a DTMF signal transmission method of a TDM-based communication network.

[Explanation of symbols]

100 3G MT 200 nodes-B 300 RNC 400 MSC 500 Additional service equipment 600 ISDN / 2G PLMN 700 ISP 800 FT / 2G MT

Continued front page    F-term (reference) 5K015 AA03 AA04 AA08 AF01 GA07                 5K024 AA76 BB02 CC11 DD01 DD04                       FF05 GG01                 5K030 HA10 HB01 HC02 HC04 HC09                       HD05 JT09                 5K051 AA05 BB01 CC07 DD01 FF07                       GG02 HH03 HH15 HH25 JJ02                 5K067 AA21 BB01 DD11 DD57 EE02                       EE10 EE16 HH11

Claims (18)

[Claims] 1. A method for confirming whether or not a supplementary service is requested, (B) a step for performing voice transmission and conversion according to the request for the supplementary service, and (C) transmission from an exchange. A method of interlocking for providing an additional service between heterogeneous communication networks, which comprises sequentially performing a step of performing an additional service device by voice. 2. In the step (B), when a supplementary service based on the different network (B1) is requested, a step of performing voice conversion for interworking with the exchange requested by the supplementary service is added. The interlocking method for providing a supplementary service between different types of communication networks according to claim 1, wherein 3. In the step (B), if a supplementary service based on the same network is requested (B2), a step of performing a voice message transmission in order to link the supplementary service with the requested exchange is added. The interlocking method for providing a supplementary service between heterogeneous communication networks according to claim 1, wherein the interlocking method is performed as follows. 4. In the step (B1), a step of performing a voice call connection between the service request switch and the supplementary service device, a step of receiving a guide message through the voice call connection, and a step of receiving the guide message Converting into a message form of the service request exchange, transmitting the converted message to the service request exchange, and receiving digit information for controlling the added service from the service request terminal. The step of converting the digit information and transmitting the digit information to the supplementary service device through the connection of the voice call is performed in sequence to provide supplementary service between different types of communication networks according to claim 2. Method. 5. The interlocking method for providing an additional service between heterogeneous communication networks according to claim 4, wherein the guide message is a PCM coding guide message. 6. The method of claim 4, wherein the digit information is converted into a DTMF signal form. 7. In the step (B2), a step of receiving a guidance message by connecting a virtual circuit to the supplementary service device, a step of transmitting the guidance message to the service request terminal, and a step of transmitting the guidance message from the service request terminal 4. The inter-heterogeneous communication network according to claim 3, wherein the step of receiving digit information for controlling the supplementary service and the step of converting the digit information and transmitting the digit information to the supplementary service device are sequentially performed. Interlocking method for providing additional services of. 8. The interworking method for providing a supplementary service between heterogeneous communication networks according to claim 7, wherein the guide message is an AMR coding guide message. 9. The digit information is AAL2 DTM.
The method of interlocking for providing supplementary services between different types of communication networks according to claim 7, wherein the method is converted into a form of an F signal message. 10. A 3G belonging to an ATM-based mobile communication network.
When a mobile terminal requests a supplementary service from a supplementary service device belonging to a TDM-based communication network, an ISU is provided between the MSC of the ATM-based mobile communication network and the TDM-based communication network.
Performing a connection of a TDM-based voice call using P, between the TDM-based communication network and the supplementary service device,
Connecting a TDM-based voice call, and when the PCM audio coded guidance message is transmitted from the supplementary service device to the MSC through a TDM-based line, the PCM audio coded guidance message is AMR audio coded. And transmitting it to the 3G mobile terminal, and receiving the digit information for controlling the supplementary service from the 3G mobile terminal to the MSC, the digit information is converted into a DTMF signal. Transmitting to the supplementary service device through the TDM-based line, and analyzing the DTMF signal received through the TDM-based line, and providing the supplementary service desired by the 3G mobile terminal. And are sequentially performed Link method for the supplementary service of heterogeneous communication networks according to Motomeko 2. 11. When a terminal belonging to a TDM-based communication network requests a supplementary service from a supplementary service device belonging to an ATM-based mobile communication network, the T
Performing a TDM-based line connection between a DM-based communication network and an MSC connected to the ATM-based mobile communication network, and using the B-ISUP and AAL2 between the MSC and the supplementary service device to AAL2 Connecting a virtual circuit, and when the MSC receives an AMR audio coded guidance message from the supplementary service device,
Converting the AMR audio coded guidance message into a PCM audio coded guidance message and transmitting the guidance message to the terminal through the TDM-based communication network; and the supplementary service from the terminal receiving the guidance message. Receiving the digit information for controlling the DTMF signal through the TDM-based line by the DTMF signal system, and using the SSCF of AAL2 to receive the DTMF signal by AA.
After forming the L2 DTMF signaling message, the MS
And transmitting an AAL2 message transmitted from the MSC and detecting an AAL2 DTMF signal message, the DTMF signal is analyzed to provide the supplementary service desired by the terminal. The method of interlocking for providing an additional service between different types of communication networks according to claim 2, wherein 12. A 3G belonging to an ATM-based mobile communication network.
When the mobile terminal requests a supplementary service from the supplementary service device belonging to the ATM-based mobile communication network, the B-IS
A step of connecting an AAL2 virtual circuit between the MSC and the supplementary service device using UP and AAL2; and when the supplementary service device transmits an AMR audio-coded guidance message, the AAL2
And transmitting the digit information for controlling the supplementary service from the 3G mobile terminal receiving the guidance message, after converting the digit information into a DTMF signal. , A
After forming an AAL2 DTMF signal message by using the SSCF of AL2 and transmitting the AAL2 DTMF signal message to the supplementary service device, and checking the AAL2 message transmitted from the MSC, if the AAL2 DTMF signal message is detected, the DTMF signal is detected. The method of interlocking for providing different services between heterogeneous communication networks according to claim 3, wherein the step of analyzing the above and providing the additional service desired by the 3G mobile terminal are sequentially performed. 13. A step of performing a voice call connection between a terminal requesting the supplementary service and a supplementary service apparatus providing the supplementary service according to a form of the supplementary service requesting side, and being adopted by the supplementary service apparatus. When a guidance message of an audio coding method is transmitted from the supplementary service device, converting the guidance message into an audio coding method adopted by the terminal and transmitting the guidance message to the terminal; and the terminal according to the guidance message. Digit information for controlling the supplementary service transmitted from the machine
Converting to an MF signal and transmitting the DTMF signal to the supplementary service device in the form of a traffic message that can be recognized by the supplementary service device;
And a step of providing an additional service requested by the terminal based on a TMF signal, the interlocking method for providing the additional service between heterogeneous communication networks. 14. The interworking method for providing supplementary services between different communication networks according to claim 13, wherein the terminal and the supplementary service device can belong to mutually different communication networks. 15. A configuration including a supplementary service device for providing supplementary service, and a mobile communication switching center in which the mobile communication network and the supplementary service device are selectively interlocked according to the type of the network requesting the supplementary service. An interlocking device for providing an additional service between heterogeneous communication networks. 16. The mobile switching center comprises: an AAL2 matching unit for matching a line with a homogeneous network according to a request for a supplementary service; and a trunk matching unit for matching a line with a heterogeneous network according to a request for a supplementary service, 16. A vocoding unit for converting a voice coding scheme of a service request network and interlocking voice messages, and is configured to include an additional service between different types of communication networks according to claim 15. Interlocking device. 17. The AAL2 matching unit, wherein the mobile switching center converts digit information for controlling a supplementary service transmitted from a mobile terminal into a DTMF signal and then forms an AAL2 signal message, and the AAL2 matching unit. An ATM switch for exchanging a message transmitted from the ATM to an ATM, and a message transmitted from the TDM-based communication network by vocoding the message switched from the ATM switch into an audio coding method used in the TDM-based communication network. From the voice signal and the DTMF signal to perform AAL2 matching, a DTMF transmitting / receiving unit for transmitting / receiving the DTMF signal, and a time for time-switching a message transmitted / received between the vocoding unit and the DTMF transmitting / receiving unit. Switch and the time 7. A trunk matching unit for matching a message switched from the switch with a TDM-based line, and each controller for controlling each component of the mobile communication switching center. 15
An interlocking device for providing an additional service between the different types of communication networks described in. 18. The vocoding unit includes a speed matching unit that matches a message transmission speed with the time switch, and a DTM from a signal message output from the speed matching unit.
A vocoder for detecting an F signal to control voice traffic matching and DTMF signal traffic matching, and converting an AMR audio coded guidance message switched from the ATM switch into a PCM audio coded guidance message; 18. The heterogeneous communication network according to claim 17, further comprising: an AAL2 matching unit that converts a voice signal into an AAL2 traffic message and a DTMF signal into an AAL2 signal message under the control of the above. Interlocking device for providing additional services.