JPH0624336B2 - Mobile phone switching system - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a mobile telephone exchange system which is connected to a general telephone network and provides a telephone service to a mobile radio telephone by a wireless line.

[Conventional technology]

Conventionally, this type of mobile telephone switching system has provided a wireless telephone subscriber with an immediate connection telephone of the same standard as a general telephone subscriber of a public telephone network, although the number of usable wireless channels is limited. It was intended to provide a service.

[Problems to be Solved by the Invention] In the above-described conventional mobile telephone exchange system, when a call is made from a mobile terminal and all the radio channels for communication are busy, the call is lost. Is treated as
The calling subscriber must repeat the calling operation until he / she can acquire the radio channel for communication without knowing how busy the exchange is, and this further amplifies the congestion. In addition, if a small number of subscribers occupy a limited number of call radio channels for a long time, a large number of subscribers will be unable to make call connections. In order to avoid the situation as much as possible, it is necessary to provide a large number of radio channels for communication, and there is a drawback that the equipment cost of the switching system becomes expensive.

[Means for solving problems]

The mobile telephone exchange system of the present invention, when a call is made from a mobile radio telephone when the radio channel is in the busy state, accepts the called party number information including the called party number, sets it in a queue, and counts the waiting time. Then, the call reception information and the maximum waiting time are returned to the calling telephone set via the control wireless channel, and when the call channel is assigned, the callee number information held is sent to the public telephone network. Call origination means for making a call and at the same time transmitting the allocated call channel information to the radio base station via the control line, and if the waiting time of the call at the head of the queue reaches a predetermined time, it is determined separately. There is an interrupting means for outputting a call disconnection notice by a voice device to a call which has been in use for more than a predetermined call time, disconnecting after a certain time and assigning the call channel to the first call in the queue.

[Action]

In this way, the maximum waiting time is shown for a call during full talk, and call information is held, while a call that is over a predetermined time is announced and disconnected. By allocating the call channel to the waiting call, it is possible to prevent the congestion state from being intensified due to the recalling phenomenon.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

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

The personal telephone 1 is a portable mobile terminal provided with a traffic information display panel 12, and the automobile radio telephone 2 is a mobile terminal provided in a vehicle and provided with a traffic information display panel 14. The radio base station 5 transmits / receives signals on the control radio channel 13 and the call radio channel 3 to / from a mobile terminal within the jurisdiction via the antenna 4, and via the call line 6 or the control line 7 of the wired transmission line. And mobile exchange 8
Relay to. The mobile switching center 8 accepts incoming / outgoing calls to the personal telephone 1 or the automobile radio telephone 2, allocates a radio channel 3 for communication, performs waiting processing during all talks, and gives a notice when a call exceeds a predetermined time. After that, forced disconnection processing is performed, and connection with the public telephone exchange 10 is performed through the telephone line 9. The public telephone exchange 10 performs outgoing / incoming call processing with the mobile exchange 8 through a telephone line 9 and is connected to a succeeding station by a telephone line 11. To the mobile switching center 8, a voice device 15 for giving notice of disconnection of a call exceeding a predetermined time, a call waiting circuit 16 for setting a call queue during a full talk in a waiting queue, and call reception information and waiting time are sent. It has a traffic information sending circuit (17) and a call time / minute counting circuit (18) that counts the call time for each call channel and counts the waiting time of a queued call.

Next, the operation of this embodiment will be described.

Now, when the personal telephone 1 makes a call, the call information is received by the wireless base station 5 via the control wireless channel 13, the antenna 4, and is identified. The wireless base station 5 transmits the calling information to the mobile switching center 8 via the control circuit 7, receives the allocation information of the communication channel 6 from the mobile switching center 8 via the control circuit 7, and transfers it to the communication channel 6. The corresponding call radio channel 3 is assigned to the personal telephone 1, and the information is transmitted to the personal telephone 1 via the control radio channel 13. The personal telephone 1 tunes to the call radio channel 3 according to the received control information, and is connected to the line to which the mobile switching center 8 has made an outgoing connection.

FIG. 3 is a diagram showing an operation sequence of the present embodiment when the call channel is fully talked, in which the broken line shows the use of the call channel.

When all the wireless channels are busy, a call is made from the personal telephone 1 or the automobile wireless telephone 2, and (calling information + callee number) 21 is the control wireless channel 13, the wireless base station 5,
When reaching the mobile switching center 8 via the control line 7, the (calling information + callee information) 21 is set in the waiting queue by the calling waiting circuit 16 and counting of waiting time for calling is started. It At the same time, the traffic information 22 including the call acceptance information and the maximum waiting time is sent to the calling subscriber on the control channel.
It is returned via 13 and displayed on the display section 12 or 14 of the personal telephone 1 or the automobile radio telephone 2. After that, when an empty call channel is captured in the mobile switch 8 or a call channel is assigned by forced disconnection, the mobile switch 8 puts the call at the head of the queue to the public telephone switch 10 in a calling state, Sends the called party number,
Therewith sent over the control line 7 of the call channel information 23 ₁ upstream and downstream captured the radio base station 5 simultaneously. The traffic channel information 23 ₂ uplink to the wireless base station 5 is supplied through a control radio channel 13 transmits to the calling subscriber, speech path confirmation signal to the communication channel of the downlink
24 ₁ is output. At this time, the call waiting state of the subscriber is canceled and the counting of waiting time is stopped.

The speech channel of the designated uplink as described above, when the personal telephone 1 or mobile radio telephone 2 that the call has output tuned folded speech path confirmation signal 24 ₂ is confirmed in the mobile exchange 8, call processing The call channel assigned to the middle call line is connected, and by the call processing of the public telephone exchange 10, the ringing tone 25 is sent to the caller until the called party answers. When the call state 26 is entered, the call time counting circuit 18 starts counting the call time.
If all the call channels become busy, the waiting time of the subscriber waiting for the call exceeds a certain limit, and the count value of the call time exceeds the limit, the corresponding call The voice device 15 outputs toque tones 27 and 28 to notify the call subscriber of the call disconnection notice through the call path, and after a certain period of time, the disconnect signal 29 is output to disconnect the call. Personal telephone 1 or car wireless telephone 2 when the call is disconnected
When is on-hook, the wireless base station 5 sends the restoration confirmation signal 30
Is received and transferred to the mobile switching center 8. Mobile switch 8
Sends a disconnection signal 31 to the public switched telephone 10 and
The transmission stop signal 31 is sent to the radio base station 5 to complete the disconnection of the call.

〔The invention's effect〕

As described above, according to the present invention, when the call wireless channel is fully busy, the waiting time until the connection is established is clearly indicated to the calling terminal of the mobile unit, and after the waiting time, the outgoing connection is automatically made. By starting the call, there is an effect that the calling party does not need to make unnecessary call re-calls, and the switching system side can prevent confusion due to the call-recall phenomenon.

[Brief description of drawings]

FIG. 1 is a relay system diagram of an embodiment of a mobile telephone exchange 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 mobile telephone exchange of FIG. It is a figure which shows the sequence of operation | movement at the time of all talk channels of a system being busy. 1 ... Personal telephone, 2 ... Automobile radio telephone, 3 ... Call radio channel, 4 ... Antenna, 5 ... Radio base station, 6,9,11 ... Call line, 7 ... Control line, 8 …… Mobile switch, 10 …… Public telephone switch, 12,14 …… Traffic information display panel, 13 …… Control radio channel, 15 …… Voice device, 16 …… Call waiting circuit, 17 …… Traffic information Sending circuit, 18 …… Counting circuit for call minutes.

Front page continuation (72) Inventor Seitaro Akita 5-7-15 Shiba, Minato-ku, Tokyo NEC Communication Systems Co., Ltd. Toshiyuki Ikeda Examiner

Claims (1)

[Claims] 1. Connected to a general telephone network and connected by a wireless line,
In a mobile telephone switching system that provides a telephone service to a mobile radio telephone, when a call is made from the mobile radio telephone when the radio channel is in the full busy state, the call is accepted including the called party number information and queued. Set to, start counting the waiting time, and return the call reception information and the maximum waiting time to the calling telephone set via the control wireless channel, and the call held when the call channel is assigned is held. Call receiving means for calling the public telephone network according to the personal number information, and at the same time sending out the assigned call channel information to the radio base station through the control line, and a waiting time for the call at the head of the queue. When the time is reached, the voice device outputs a call disconnect notice for a call that has been in use for more than the specified call time, disconnects after a certain period of time, and disconnects the call channel at the head of the queue. Mobile telephone switching system, characterized in that it comprises an interrupt means for assigning the call.