JPH01189240A - Mobile telephone exchange system - Google Patents

Abstract

PURPOSE:To prevent a caller from executing a useless re-call and to prevent generating a confusion due to a re-call phenomenon at an exchange system side, as well by clearly expressing a queuing time to the calling terminal of a mobile body and starting a transmission connection automatically after the queuing time, when radio channels for calls are all busy. CONSTITUTION:When a call is executed from a personal telephone set 1 of an automobile wireless telephone set 2 while the radio channels are all busy, it attains through a radio channel 13 for a control, a radio base station 5 and a control line 7 to a mobile exchange 8, it is set in a queuing line, the count of a queuing time is started, simultaneously, call acceptance information and a maximum queuing time are returned to a call subscriber, and they are displayed on a display 12 or 14. Thereafter, when a channel is assigned, the mobile exchange 8 makes the call of the head of the queuing line into a call condition to a public telephone exchange 10, a number to be called is sent, simultaneously, the radio base station 5 transmits incoming call channel information, which is given, to the call subscriber, simultaneously, a channel confirming signal is outputted to an outgoing channel, a call queuing condition is canceled, and the counting of the queuing time is stopped.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a mobile telephone switching system that is connected to a general telephone network and provides telephone services to mobile radio telephones via radio lines.

[Conventional technology]

Traditionally, mobile telephone switching systems of this type have provided wireless telephone subscribers with the same standard of instant-connection telephone service as regular telephone subscribers of the public telephone network, despite the limited number of available radio channels. The purpose was to provide a service.

[Problems to be Solved by the Invention] In the conventional mobile telephone switching system described above, when a call is made from a mobile terminal, if all radio channels for communication are busy, the call is lost. Because it is processed as
The calling subscriber has to repeat the call operation until he or she can seize the radio channel for the call, without knowing that no matter how wide the switchboard is, this further amplifies the congestion situation. In addition, if a small number of subscribers occupy a limited number of wireless communication channels for a long time, many subscribers will be unable to make a call connection. In order to avoid busy situations as much as possible, it is necessary to provide a large number of communication radio channels, which has the drawback of increasing the equipment cost of the switching system.

[Means for solving problems]

The mobile telephone switching system of the present invention, when a call is made from a mobile radio telephone when all radio channels are busy, receives the call including the called party number information, sets it in a queue, and counts the waiting time. and sends the call acceptance information and maximum waiting time back to the calling telephone via the control radio channel, and when the call channel is assigned, the call is sent to the public telephone network using the reserved called party number information. call receiving means for making a call and simultaneously transmitting allocated communication channel information to the radio base station via a control line; The present invention has an interrupting means for outputting a call disconnection notice using an audio device for a call that is in progress beyond a set call time, disconnecting the call after a certain time, and allocating the call channel to the call at the head of the queue.

[Effect]

In this way, the maximum waiting time is indicated for calls made when all calls are busy, and call information is held, while calls that are in progress after a predetermined time M are disconnected with advance notice. By allocating the communication channel to the waiting call, it is possible to prevent congestion from intensifying due to repeat call phenomenon.

(Example) Next, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a relay system diagram of an embodiment of the mobile telephone exchange system of the present invention, and FIG. 2 is a block diagram of the mobile exchange 8 in FIG. 1.

A personal telephone 1 is a portable mobile terminal equipped with a traffic information display panel 12, and an automobile radio telephone 2 is a mobile terminal installed in a car and equipped with a traffic and information display panel 14. The radio base station 5 transmits and receives signals on the control radio channel 13 and the communication radio channel 3 to mobile terminals within its jurisdiction via the antenna 4, and sends and receives signals via the communication line 6 or control line 7 of the wired transmission path. relay to the mobile exchange 8. The mobile switch 8 makes calls to the personal telephone 1 or the automobile radio telephone 2.
It accepts incoming calls, allocates the radio channel 3 for calls, performs waiting processing when all calls are busy, performs forced disconnection processing after advance notice for calls that exceed a predetermined time, and disconnects calls between them and the public telephone exchange 10. The connection is made via the telephone line 9. Public telephone exchange 10
processes calls to and from the mobile exchange 8 via a telephone line 9, and is connected to a downstream station via a telephone line 11.

The mobile exchange 8 includes an audio device 15 that gives notice of disconnection of a call that exceeds a predetermined time, a call waiting circuit 16 that sets a waiting queue for calls made when all calls are busy, and sends out call acceptance information and waiting time. A traffic information transmitting circuit 17 is provided, and a call time/minute counting circuit 18 is provided to count the call time for each call channel and to count the waiting time of queued calls.

Next, the operation of this embodiment will be explained.

Now, when the personal telephone 1 makes a call, the call information is received and identified at the radio base station 5 via the control radio channel 13 via the antenna 4. The radio base station 5 transmits the call information to the mobile exchange 8 via the control line 7 , receives the assignment information of the call line 6 from the mobile exchange 8 via the control line 7 , and assigns the call line 6 to the call line 6 . A corresponding wireless communication channel 3 is assigned to the personal telephone 1, and the information is transmitted to the personal telephone 1 via the control wireless channel 13. The personal telephone 1 tunes to the communication radio channel 3 in accordance with the received control information, and is connected to the line to which the mobile exchange 8 has made the outgoing connection.

FIG. 3 is a diagram showing the sequence of operations when all communication channels are busy in this embodiment, where the broken lines indicate control channels, and the straight lines indicate use of communication channels.

When all wireless channels are busy, a call is made from personal telephone 1 or car radio telephone 2, and (calling information + called party number) 21 connects control wireless channel 13, wireless base station 5, and control line 7. When it reaches the mobile exchange 8 via
(Call information + called party information) 21 is set in a waiting queue by the call waiting circuit 16, and counting of the waiting time for the call is started. At the same time, traffic information 22 including call acceptance information and maximum waiting time is sent back to the calling subscriber via the control channel 13, and the personal telephone 1
Or it is displayed on the display section 12 or 14 of the car radio telephone 2. Thereafter, when the mobile exchange 8 acquires a vacant communication channel or is assigned a communication channel by forced disconnection, the mobile exchange 8 transfers the information to the public telephone exchange I.
The call at the head of the queue is made to call O, the called party number is sent, and at the same time, the uplink and downlink communication channel information 23. is transmitted via the control line 7. The radio base station 5 uses the given uplink communication channel information 232 as the control radio channel 1.
3 to the calling subscriber, and also sends a communication route confirmation signal to the downstream communication channel 24.3. Output. At this time,
The subscriber's call waiting state is canceled and counting of the waiting time is stopped.

- When the mobile exchange 8 confirms that the personal telephone 1 or automobile radio telephone 2 that made the call has been tuned to the designated uplink communication channel as described in F and has outputted the return call path confirmation signal 242, the call is made. The call channel assigned to the call line being processed is connected, and the call processing of the public telephone exchange IO sends out the ringing tone 25 to the calling party until the called party answers. When you enter call state 26,
The call time/minute counting circuit 18 starts counting the call time. If all call channels are busy, the waiting time of a subscriber waiting for a call exceeds a certain limit, and the counted value of the call time exceeds the limit, the corresponding call To the calling subscriber, the audio device 15 outputs a talk tone 27, 28 through the communication path to notify the user that the call will be disconnected, and after a certain period of time, a disconnection signal 29 is output and the call is disconnected. When the personal telephone 1 or the car radio telephone 2 goes on-hook due to disconnection of the call, the radio base station 5
receives the recovery confirmation signal 30 and transfers it to the mobile exchange 8. The mobile exchange 8 sends a disconnection signal 31 to the public telephone exchange 10, and also sends a transmission stop signal 31 to the radio base station 5, thereby completing the disconnection of the call.

(Effects of the Invention) As explained above, the present invention clearly indicates the waiting time until connection is established to a calling terminal of a mobile object when all radio channels for calls are busy, and after the waiting time By automatically starting an outgoing connection, the calling party does not have to make unnecessary calls again, and the switching system also has the effect of preventing confusion caused by the repeat call phenomenon.

[Brief explanation of the drawing]

FIG. 1 is a relay system diagram of an embodiment of the mobile telephone switching system of the present invention, FIG. 2 is a block diagram of the mobile telephone exchange 8 in FIG. 1, and FIG. 3 is a diagram of the mobile telephone exchange of FIG. 1. FIG. 3 is a diagram showing the sequence of operations when all communication channels of the system are busy. DESCRIPTION OF SYMBOLS 1...Personal telephone, 2...Car radio telephone, 3...Radio channel for calls, 4...Antenna, 5...Radio base station, 6
．． 9, 11...Telephone line, 7...Control line, 8...
・Mobile switchboard, 10・-Public telephone switchboard, 12,
14...Traffic information display panel, 13...Control wireless channel. 15...Audio device, 16...Call waiting circuit, 17...Traffic information sending circuit, 18...
Call time and minute counting circuit.

Claims (1)

[Claims] In a mobile telephone switching system that is connected to a general telephone network and provides telephone services to mobile radio telephones via radio lines, when all radio channels are busy, a call is made from the mobile radio telephone. When a call is received, it is accepted with the called party number information, set in the queue, starts counting the waiting time, and transmits the call acceptance information and the maximum waiting time to the calling telephone over the control radio channel. When a call channel is assigned, a call is made to the public telephone network using the reserved called party number information, and at the same time, the assigned call channel information is sent to the wireless base station via a control line. a call accepting means; when the waiting time of the call at the head of the queue reaches a predetermined time, outputting a call disconnection notice by means of an audio device to the call that is in progress beyond a separately determined call time; A mobile telephone switching system characterized by having an interrupting means for disconnecting the communication channel after a certain period of time and allocating the communication channel to a call at the head of a queue.