JPH1188253A - Method for converting and transmitting calling sound code, mobile communication system and exchange - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify a line setting procedure itself at the time of communication between digital mobile equipment without necessitating the change of line setting by matching a coding system for communication between plural mobile terminals, connecting communication lines through codec through, encoding a calling sound by a matched code so as to transmit. SOLUTION: A voice encoding system to be used before setting a call is matched between the mobiel equipments 3 and 4 (S202). Communication lines between the equipment 3 and exchange 2 and between the exchange 2 and the equipment 4 are codec-through-controlled to execute a call setting request (S204 and S206). After then, a sending request from the equipment 4 is transmitted to the exchange 2 (S210). The exchange 2 codes a calling sound received from an audible sound generating circuit to a coding form similar to a line under communication (S214). Then, when the equipment 4 responds to the calling, the exchange 2 responds to the request of call setting (S216) to start speaking (S218).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to mobile communication, and more particularly to transmission of a ring tone between digital mobile devices.

[0002]

2. Description of the Related Art In mobile communication, in the case of communication between mobile stations using equivalent radio-coded voice signals, a radio signal transmitted from the mobile station is transmitted using a voice coding apparatus (codec) in the communication system. The coded voice is once converted into a wired coded voice in the communication system, and is again converted into a radio coded voice. In this system, since the speech encoding device is connected in two stages, there is a disadvantage that encoding distortion due to the conversion occurs, and the speech quality is deteriorated.

In order to overcome such a drawback, in the case of terminal-to-terminal communication using different audio coding schemes, a speech encoding apparatus is connected to perform code conversion in the communication system, and the same audio encoding apparatus is connected. In the case of communication between terminals using an encoding method, a codec-through method in which the audio encoding device is disconnected and the terminals are connected without passing through the audio encoding device has been considered (Japanese Patent Laid-Open No. 5-63833). Japanese Unexamined Patent Publication No. Speech code non-conversion communication control system).

The control of the line setting in the case of the conventional codec through system will be described with reference to a connection diagram shown in FIG.

In FIG. 3, 13-1, 13-2, 13
-3,13-4,13-5,13-6,13-7,13
Reference numeral -8 denotes a communication control line, 14-1, 14-2, 14
-3, 14-4, 14-5, 14-6, and 14-7 are communication lines. The mobile device 3 and the mobile device 4 are digital mobile devices, and the speech coding devices 5 and 6 are connected as usual without being passed through when a line is set.

FIG. 4 shows a communication sequence of the terminating exchange 2 of the line setting in the connection diagram of FIG.

When setting up a communication line between the mobile units 3 and 4, first, a call setting request is made between the mobile unit 3, the exchange 1 and the exchange 2 without performing codec through control. (S402). Call control is performed between the exchange 2 and the mobile unit 4 (S404 and S406), and the mobile unit 4 is being called from the mobile unit 4 to the call control processor 12 of the exchange 2 via the control line 13-8. Is transmitted (S408). A ringing tone transmission request for transmitting a ringing tone (RBT: ring back tone) indicating the above is transmitted. Upon receiving the ringing tone transmission request, the call control processor 12 sets the control line 13-6.
Requests the audible sound generation circuit 10 to transmit a ringing tone (S
410). At the same time as this request, the control lines 13-5, 13
By -7, the connection method is instructed to the communication path connecting device 8 and the voice coding device 6. The audible sound generator 10 instructed to send the ringing tone sends out the ringing tone to the communication path connecting device 8 via the communication line 14-5 (S412). When the mobile unit 4 responds to the call, the speech coding unit 5 of the exchange 1 is disconnected and the line control of codec through is performed (S414). Then, the exchange 2 responds to the call setting request (S416), and makes a call between the mobile device 3 and the mobile device 4 (S418) (for details, refer to the above-mentioned JP-A-5-63833). Note that the control of disconnection of the audio encoding device 5 does not necessarily mean that the audio encoding device 5 is physically disconnected from the communication path. For example, by switching the operation mode of the audio encoding device 5 and changing from the code conversion mode to the non-conversion mode, the audio encoding device 5 may be controlled to be substantially separated.

As described above, in the radio communication system using the conventional control method, when the mobile unit 3 originates a call and the mobile unit 4 receives a call, the exchange 2 which is the receiving side exchange of the mobile unit 4 generates a ringing tone. A ringing tone to be transmitted is sent out, and after the ringing tone is ended, the speech encoding device 5 of the exchange 1 as the originating exchange is controlled to be disconnected, and a call is started after the line setting for codec-through is performed again. ing.

As described above, in the conventional system, the ringing tone is transmitted before the line setting of the codec through control is performed, and the line setting is reset after the transmission of the ringing tone to perform the codec through control. It will be.

[0010]

Conventionally, in digital inter-mobile communication, after a communication line is set by codec through control, a ringing tone cannot be transmitted to a communication partner mobile device. For this reason, in order to transmit a ringing tone, a normal line setting in which encoding is performed by both the mobile unit and the exchange is performed, and after the line is set and the ringing tone is not transmitted, the voice encoding of the exchange is performed. It was necessary to redo the line setting as a codec thru without using the device.

An object of the present invention is to eliminate the need to change the line setting and to simplify the line setting procedure itself during digital inter-mobile communication.

[0012]

In order to achieve the above object, the present invention comprises a plurality of mobile terminals and a plurality of exchanges, and connects between the plurality of mobile terminals and the exchanges,
In the ringing tone code conversion transmission method in the wireless communication system connecting the exchanges, the encoding method of communication between the plurality of mobile terminals is matched, the communication line is connected by codec through, and the ringing tone is matched. It is characterized by being encoded by a code and transmitted. As a result, it is possible to transmit a ringing tone to a communication line connected through a codec through connection.

[0013] A mobile communication system and an exchange for performing the above described ringing code conversion transmission method are also the present invention.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the configuration of a wireless communication system which is an example of the ringing tone code conversion transmission system of the present invention. In FIG. 1, 16-1, 16-2, 16-3, 16-4, 1
Reference numerals 6-5, 16-6, 16-7, and 16-8 denote control lines, and 15-1, 15-2, 15-3, 15-4, and 15-.
5, 15-6 and 15-7 are communication lines. Mobile device 3,
The mobile device 4 is a digital mobile device, and the line under communication is performing codec through control.

FIG. 2 is a block diagram of the wireless communication system shown in FIG. 1 in which the mobile station 3 originates a call and the mobile station 4 receives an incoming call. 2 shows a communication sequence for transmitting a ring back tone.

The operation of the embodiment of the present invention will be described with reference to FIGS.

First, between the mobile unit 3 and the mobile unit 4,
Match the voice coding method used before setting the call (S2
02). Please refer to Japanese Patent Application Laid-Open No. 06-6295 entitled "Code matching method" for the matching of the voice coding method.

Next, when the coding system is matched, the communication lines between the mobile station 3 and the exchanges 1 and 2 and between the exchange 2 and the mobile station 4 are controlled by the codec through control. Make a setting request (S204 and S20)
6). Thereafter, a call sound transmission request is transmitted from the mobile device 4 to the call control processor 12 via the control line 16-10 (S210). Upon receiving the ringing tone transmission request, the call control processor 12 requests the audible tone generating circuit 10 to send the ringing tone through the control line 16-8, and at the same time controls the control lines 16-6, 16
-7, the communication path connecting device 8 and the ringing tone encoding device 18
To tell the connection method.

Thereafter, the audible tone generating circuit 10 sends a ring tone to the ring tone coder 18 via the communication line 15-8. The ringing tone encoding device 18 includes the audible tone generating circuit 10.
The received ringing tone is encoded into the same encoding format as the line under communication (S212), and transmitted to the communication path connecting device 8 through the communication line 15-7 (S214). The communication path connecting device 8 which has received the encoded ringing tone transmits the encoded ringing sound to the set line, and the communication path connecting device 8 of the exchange 1 is transmitted from the communication line connection device 8 via the communication line 15-5. Sends a ringtone to. The communication path connection device 7 transmits a ringing tone to the mobile device 3 via the communication line 15-2. When the mobile station 4 responds to the call, the exchange 2 responds to the call setting request (S216), and the telephone conversation is started (S218).

As described above, according to the present invention, prior to the call setting, matching between the voice coding methods used between the mobile device 3 and the mobile device 4 is performed, and the call setting is performed using the voice coding method. In the present invention, if the ringing tone from the exchange 2 is in the same voice encoding system as the set line, there is no need to control the disconnection of the voice encoding device after the ringing tone is transmitted or reset the line. .

[0021]

When the digital mobile unit communicates with the digital mobile unit, the conventional ringing tone transmission method sets a normal line, sends the ringing tone, and then sets the line for codec through control. Had to be reset.

In the present invention, it is necessary to match the encoding method between mobile units before setting the line, but it is possible to set the line by the codec through control procedure from the beginning, and the digital mobile unit Line settings for communication can be simplified.

[Brief description of the drawings]

FIG. 1 is a connection configuration diagram of the present invention.

FIG. 2 is a diagram showing a sequence of the present invention.

FIG. 3 is a connection configuration diagram of a conventional system.

FIG. 4 is a diagram showing a sequence of a conventional method.

[Explanation of symbols]

 1, 2 switching device 3, 4 mobile device 5, 6 voice coding device 7, 8 communication path connection device 9, 10 audible sound generation circuit 11, 12 call control processing device 13-1 to 13-8 communication control line 14-1 １４14-7 Communication line 15-1 to 15-9 Communication line 16-1 to 16-10 Communication control line 17,18 Ring tone coder

Claims (3)

[Claims] 1. A mobile communication system comprising: a plurality of mobile terminals; and a plurality of exchanges, connecting between the plurality of mobile terminals and the exchanges,
In the ringing tone code conversion and transmission method in the wireless communication system connecting the exchanges, the coding method of communication between the plurality of mobile terminals is matched, the communication lines are connected by codec through, and the ringing tone is matched. A ring tone code conversion and transmission method capable of transmitting a ring tone to a communication line connected through a codec through connection, wherein the ring tone is encoded and transmitted. 2. A mobile communication system having a plurality of wireless terminals and a plurality of exchanges, connecting between the plurality of wireless terminals and a plurality of exchanges, and connecting the exchanges, wherein the exchange comprises: Wireless communication between the wireless terminals, the communication line is connected by codec-through, and the ringing tone is encoded with a matched code and transmitted, and the communication is connected by codec-through. A mobile communication system capable of transmitting a ring tone to a line. 3. A plurality of wireless terminals and a plurality of exchanges, wherein the plurality of wireless terminals and the plurality of exchanges are connected by a radio communication line and a radio control line, and the exchanges have a communication line and a telephone call. The exchange in the wireless communication system connected by the control line, adjusts a coding method of communication between the plurality of wireless terminals, connects the communication line by codec through, encodes a ringing tone with a matched code. An exchange which transmits a ringing tone to a communication line connected through a codec through connection.