JP2930040B2 - PHS emergency outgoing call connection control system and method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a PHS (Personal Handy Phone System) emergency outgoing call connection system and method , and more particularly, to a PHS emergency outgoing call connection control system and method for interrupting a call in progress. .

[0002]

2. Description of the Related Art In a conventional emergency telephone call connection control system, when priority is given to an emergency telephone call (also referred to as an "emergency outgoing call"), an emergency telephone call connection control is performed for a calling party and a called party in advance. It was necessary to apply for the service to the telephone company and register this emergency telephone call connection control service in the subscriber data of the central office.

[0003] As a conventional emergency telephone call connection control system, for example, Japanese Patent Application Laid-Open No. 63-51758 discloses a system in which a calling party and a called party agree in advance even during a call with a call gradient. For this reason, a method has been proposed in which a call is forcibly interrupted and a call between the caller and the called party is made possible, so that it is possible to immediately respond to the occurrence of a serious situation on the caller side due to the inability to call. ing.

[0004]

As described above, the conventional system has the following problems.

(1) The first problem is that, in the conventional emergency telephone call connection control service, when all the channels of the cell station (referred to as "CS") are busy, emergency special numbers such as police and fire are also required. It is not possible to make a call immediately.

[0006] The reason is that when giving priority to an emergency call, it is necessary for both the subscribers of the telephone company to apply for registration of this service (subscriber data) in advance.

(2) The second problem is that in the conventional emergency telephone call connection control system, the interrupted subscriber cannot make a telephone call until the emergency telephone call ends.

[0008] The reason is that it does not have a function of transferring a channel for interrupting a call.

(3) A third problem is that, in the current PHS system, when a CS communication channel is in the maximum call connection state, a connection request for an emergency outgoing call such as police, fire and the like is issued from a new PHS subscriber. If there is, it means that the call cannot be made until there is a vacancy in the CS call channel.

[0010] The reason is that the number of communication channels held by the CS is limited.

[0011] Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to provide a PHS in which a CS is in a maximum call connection state, there is no available communication channel in the CS, and a call cannot be made. It is an object of the present invention to provide a PHS emergency outgoing call connection control system and method that enables only emergency special number calls such as police and fire in a state.

[0012]

To achieve the above object, according to an aspect of, PHS emergency originating call connection control how the present invention, the cell station (CS) is in the maximum call connection state, a new PH
When an S-subscriber makes a call request for a predetermined emergency special call such as police or fire, even if all the call channels of the cell station are busy, the channel during the call is temporarily disconnected and the emergency Forcibly interrupt the call channel to prioritize the call processing of the special service call, make a call connection of the emergency special service call, and shift the interrupt channel if the emergency special service call continues for more than a certain talk time. The feature is that the call is changed and the call is continued.

[Outline of the Invention] The outline of the present invention will be described below. In the present invention, when the PHS CS is in the maximum call connection state, when a new PHS subscriber requests a call connection to an emergency special number call such as police, fire, etc., even if the CS communication channel is busy, the emergency special number call is not used. For prioritizing the call, means for forcibly disconnecting the call channel during the call, interrupting the CS call channel used by another subscriber, and then connecting the call (CS200 in FIG. 2, PHS server 40)
0).

When the CS is in the maximum call connection state and there is no available communication channel, and an emergency outgoing call connection request such as police or fire is made by a PHS subscriber, the CS communication channel during the call is temporarily disconnected and PH to make a call connection request
The S server issues a call interruption instruction to the channel currently in use. In response, the CS prepares a new communication channel.

[0015] Thus, a call can be made without having to wait until a free call channel is created in the CS.

[0016]

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

FIG. 1 is a block diagram for explaining an embodiment of the present invention. Referring to FIG. 1, PHS subscribers 101, 102, and 103 are connected to subscribers 901, 902, and 903 via a cell station (hereinafter, referred to as "CS") 200, a PHS server 400, a public network 700, and an electronic exchange 800, respectively. During a call, at this stage CS2
00 is the maximum call connection state.

Here, the PHS subscriber 104 newly establishes CS
A call request is sent to emergency special number subscriber 900 toward 200. At this time, the CS 200 recognizes that there is no free communication channel, and
At 00, it reports that a new PHS subscriber 104 has called.

The PHS server 400 is a PHS subscriber 1
04 is a contracted subscriber of the own telephone company (hereinafter referred to as “regular subscriber”) or a home location register (H
omeLocation Register; "HLR") 600
The HLR 600 reports to the PHS server 400 whether or not the subscriber is an authorized subscriber.

For a regular subscriber, the PHS subscriber 104
The PHS server 400 analyzes the calling number dialed by. As a result, when the PHS subscriber 104 requests a call to a member other than the emergency special number subscriber list registered in the PHS server 400 in advance, a tone that indicates that connection is not possible is transmitted to the PHS server 400 via the PHS server 400. CS20
0, send to PHS subscriber 104, call not connected.

The PHS subscriber 104 is the emergency special subscriber 90
0, the PHS server 400 selects the subscriber with the longest talk time among the PHS subscribers 101, 102, and 103, and the CS 200
A call interruption instruction is issued in order to forcibly temporarily cut off the call channel used by the subscriber and give top priority to the call of the PHS subscriber 104 for an emergency call connection request.

Here, the operation will be described below assuming that the PHS subscriber 101 has the longest talk time.

The PHS server 400 sends an emergency outgoing call interruption announcement of the announcement 500 to the CS20.
0 to the PHS subscriber 101.

At the same time, the PHS server 400
The emergency call interrupt notification of the announcement 500 is also sent to the subscriber 901 via the public network 700 and the electronic exchange 800.

With this operation, the PHS subscriber 101 and the subscriber 901 recognize that the call is temporarily disconnected due to the call interruption due to the emergency outgoing call.

After sending the announcement, PHS server 400 instructs CS 200 to temporarily disconnect the call of PHS subscriber 101.

CS 200 receives this instruction from PHS server 400 and disconnects the call from PHS subscriber 101.

The PHS server 400 sends a call disconnection signal of the PHS subscriber 101 to the electronic exchange 800 via the public network 700. Upon receiving the disconnection signal, the electronic exchange 800 disconnects the call of the subscriber 901.

With this series of operations, the PHS subscriber 10
1 and the subscriber 901 are disconnected.

Next, the PHS server 400
0 is instructed to allocate the communication channel used by the PHS subscriber 101 to the PHS subscriber 104.

At the same time, the PHS server 40
No. 0 issues an emergency outgoing call connection request of the emergency special number subscriber 900 to the electronic exchange 800 via the public network 700.

Upon receiving an instruction and a request from the PHS server 400, the PHS server 400 and the electronic exchange 800
The PHS subscriber 104 is connected via the public network 700, and a call between the PHS subscriber 104 and the emergency special number subscriber 900 is made.

The call with the emergency special number is
If the registration is still continued after the time registered in the PHS server 400 elapses, the PHS server 400
Selects one of the PHS subscribers 102 and 103 having a longer talk time. If the PHS subscriber 102 has a longer talk time, the same operation as described above is performed.
At the time of a call interruption, an emergency call interruption announcement is sent to the PHS subscriber 102 and the subscriber 902, and the PHS subscriber 10
2. The call of the subscriber 902 is temporarily disconnected, the call channel of the PHS subscriber 102 is allocated to the PHS subscriber 104, and the call connection of the PHS subscriber 104 is continued.

Until the call of the PHS subscriber 104 ends, the connection rotation of the emergency special number call is repeated.

Once a PHS subscriber is interrupted, the rotation order at the time of the next interrupt request is lowered, and the PHS
Even if the subscribers 101 and 102 have been talking longer than the PHS subscriber 103, the call has already been interrupted once. Therefore, when a new call interruption request is received, the call is forcibly assigned to the PHS subscriber 103. Be included.

As described above, the PHS subscribers 101, 10
If the rotation of 2,103 has completed one cycle, PHS
When subscribers 101, 102, and 103 are in the same area and CS2
When 00 is in charge, from the next interrupt request,
Regardless of talk time, PHS subscribers 101, 102, 1
The interrupt rotation is performed in the order of 03.

The PHS server 400 controls this rotation pattern.

When the emergency call interruption is released, the connection of the PHS subscriber whose call has been temporarily disconnected is restored.

In the recovery of PHS subscriber 101, CS
200 checks whether the PHS subscriber 101 is currently in its own area, and if it is in the same area, returns to the call channel before interruption again, and
0, a call is made with the subscriber 901 via the PHS server 400, the public network 700, and the electronic exchange 800.

At this time, the CS 200 newly reports the location information of the PHS subscriber 101 to the HLR 600 via the PHS server 400, and the HLR 600 newly
Recognize the location information of the HS subscriber 101.

When the PHS subscriber 101 goes out of the area of the CS 200, a handover process is started, and
C with the best radio wave at the position where the HS subscriber 101 exists
S becomes in charge of the PHS subscriber 101 and returns to the call processing state before the interruption.

Assuming that this new CS is CS300, CS300 sends the PHS server 400 a PHS
Report that it was in charge of call processing for subscriber 101, and
The server 400 informs the HLR 600 of the location of the new PHS subscriber 101, and receives this notification,
Reference numeral 600 rewrites the location information of the PHS subscriber 101.

Thereafter, the PHS subscriber 101 sets the CS 30
0, a call is made with the subscriber 901 via the PHS server 400, the public network 700, and the electronic exchange 800.

In the current PHS, since the number of CS communication channels is small, if the number of PHS subscribers is concentrated in a certain area, a problem arises in that a congestion state continues and it is difficult to make a call.

However, in the above-described embodiment of the present invention, even if the CS is in the maximum call connection state, the emergency outgoing call can be preferentially performed by the emergency outgoing call connection control method, so that the emergency And increase the added value of PHS.

Next, the operation of the embodiment of the present invention will be described in detail with reference to FIG. FIG. 2 is a diagram for explaining the operation of the embodiment of the present invention.

Referring to FIG. 2, PHS subscriber 101,
The PHS subscriber 102 and the PHS subscriber 103
200 and the PHS server 400 are connected by communication channels 206, 207, and 208, respectively.
00, public network 700, electronic exchange 8
A call is being made with the subscribers 901, 902, and 903 via 00. At this point, CS 200 is in the maximum call connection state, and there is no idle communication channel.

In this state, a call request for emergency special number subscriber 900 is newly issued from PHS subscriber 104 to CS 200. This request is based on the antenna unit 2 of the CS200.
01, the control unit 20 via the receiving unit 203 (see FIG. 3).
4 together with the outgoing call request, the control unit 20
No. 4 reports to the PHS server 400 that the communication channels 206, 207, and 208 are already in use and there are no free communication channels.

This is reported from the input / output unit 401 of the PHS server 400 to the control unit 403 via the input / output unit 205 of the CS 200 and the control channel 209.

In response, control section 403 checks whether PHS subscriber 104 is an authorized subscriber or not.
Via the input / output unit 401 and the control channel 209, CS
For 200, a subscriber number inquiry signal of the PHS subscriber 104 is issued.

This signal is supplied to the input / output unit 205 of the CS 200
Is sent to the control unit 204 via The control unit 204
After receiving this signal, it transmits a subscriber number inquiry signal to PHS subscriber 104 via transmitting section 202 (see FIG. 3) and antenna section 201.

Upon receiving this signal, PHS subscriber 104 immediately transmits his / her subscriber number to CS 200.

The CS 200 further includes an antenna unit 201,
Via the receiving unit, the control unit 204 sends the PHS subscriber 10
Send the subscriber number of 4. The control unit 204 receives the subscriber number via the input / output unit 205 and the control channel 209, and
The data is transmitted to the control unit 403 via the input / output unit 401 of the HS server 400.

The control unit 403 of the PHS server 400
After receiving the subscriber number, the HLR 600 is checked against a list of authorized subscriber numbers registered in the HLR 600 in advance.
Sends an inquiry request to.

The inquiry result is reported from the HLR 600 to the control unit 403 of the PHS server 400. At this time,
If it exists in the subscriber number list of the HLR 600, it is determined that the subscriber is an authorized subscriber.

For the regular subscriber, the PHS server 40
The control unit 403 of 0 compares the outgoing call connection request number sent from the PHS subscriber 104 with the emergency special number list registered in the storage unit 402 in advance.

When the outgoing call connection request from the PHS subscriber 104 is a call connection request other than the emergency special number list, the control unit 403 sends a busy tone to the tone generation unit 404 (see FIG. 3). Instruct 401 to send. In response to this, the input / output unit 401 sends a busy tone to the input / output unit 205 and the control unit 204 of the CS 200 via the control channel 209, and further, the transmission unit 202,
A busy tone is heard to the PHS subscriber 104 via the antenna unit 201. This allows the PHS subscriber 104
Know that you cannot make a call.

If the outgoing call connection request from PHS subscriber 104 is a number on the emergency special number list, control unit 403 of PHS server 400 determines that the outgoing call request of PHS subscriber 104 is an emergency outgoing call and Recognizing that the call connection request of the outgoing call has the highest priority, the PHS subscriber 10
The following processing is performed in order to allocate one of the communication channels being used by 1, 102 and 103 to the emergency outgoing call of the PHS subscriber 104.

The control unit 403 includes the PHS subscribers 101, 1
Storage unit 4 in which the total call time of 02 and 103 is stored
02, the subscriber having the longest talk time among the PHS subscribers is searched.

The following operation will be described on the assumption that the PHS subscriber 101 has the longest talk time.

The control unit 403 of the PHS server 400
From the announcement 500, an emergency call interruption interrupt is sent to the input / output unit 205 via the input / output unit 401 and the communication channel 206.

At the same time, the control unit 4 of the PHS server 400
03 denotes an input / output unit 401, a control channel 209, CS
The control unit 2 of the CS 200 via the input / output unit 205 of the
04, the PHS subscriber 101 is instructed to send an emergency outgoing call interruption announcement from the announcement 500.

Thus, the control unit 204 of the CS 200
Transmits an emergency call interrupt interrupt announcement from the announcement 500 to the PHS subscriber 101 via the transmission unit 202 and the antenna unit 201.

When the PHS subscriber 101 hears this announcement, it recognizes that the call is temporarily forcibly disconnected due to an emergency outgoing call.

On the other hand, the PHS subscriber 101 is
The control unit 403 of the PHS server 400 controls the input / output unit 401 and the public network 7 to notify that the call interruption by the emergency calling subscriber occurs and the call is temporarily forcibly disconnected.
Announcement 5 to electronic exchange 800 via 00
Send an emergency outgoing call interrupt announcement from 00,
Electronic exchange 800 sends a call interruption announcement to subscriber 901. As a result, the subscriber 901 recognizes that the call is temporarily disconnected due to the call interruption of the emergency outgoing call.

Next, a call disconnection operation is performed. Control unit 403
Sends a disconnection signal to the control unit 204 via the input / output unit 401, the control channel 209, and the input / output unit 205 to forcibly disconnect the communication channel 206 used by the PHS subscriber 101. .

The disconnection signal is sent to the control unit 204 of the CS 200.
Is received, the control unit 204 issues an instruction to disconnect the communication channel 206 to the input / output unit 205.

The control unit 403 of the PHS server 400
At the same time as the above operation, a disconnection signal is sent to the electronic exchange 800 via the input / output unit 401 and the public network 700 to temporarily disconnect the call between the subscriber 901 and the PHS subscriber 101.

In response to the disconnection signal, electronic exchange 800
Disconnects the call of the subscriber 901. Through this series of operations, the call between the PHS subscriber 101 and the subscriber 901 is disconnected.

After the call is disconnected, the control unit 204 of the CS 200
Are input / output unit 205, control channel 209, input / output unit 401 to control unit 403 of PHS server 400.
And sends a call disconnection completion signal via the.

When the control unit 403 of the PHS server 400 receives this signal, the control unit 403 sends an emergency call to the control unit 204 of the CS 200 via the input / output unit 401, the control channel 209, and the input / output unit 205. Sends a call connection request signal.

The control unit 40 of the PHS server 400
3 is stored in the storage unit 402 when the emergency call interrupt is completed.
As data for restoring a call between the S subscriber 101 and the subscriber 901, the used call channel number before the interruption (the call channel 206), the call restoration subscriber telephone number (the PHS subscriber 101, the subscriber 901), and the call The interrupt start time, the call interrupt end time, and the call cumulative time are stored.

The control unit 40 of the PHS server 400
3, the HLR 600 registers the location of the PHS subscriber 101 before the call is disconnected, and stores that the CS 200 is in charge of control.

Next, a call connection operation between the PHS subscriber 104 and the emergency special number subscriber 900 is performed using the channel which has become vacant due to the disconnection.

The control unit 204 of the CS 200 transmits an emergency outgoing call connection request signal via the transmitting unit 202 and the antenna unit 201.

When this signal is received by the PHS subscriber 104, it enters a state of waiting for a response from the emergency special number subscriber 900 described below.

On the other hand, at the same time, the PHS server 400 passes through the control unit 403, the input / output unit 401, and the public network 700,
An emergency outgoing call connection request signal is sent from the PHS subscriber 104 to the emergency special number subscriber 900 to the electronic exchange 800.

In response to this, electronic exchange 800 calls emergency special number subscriber 900, and when emergency special number subscriber 900 answers, talks through public network 700. This allows
A call between the PHS subscriber 104 and the emergency special number subscriber 900 is started.

If the talk time is long, the PH
The call between the S-subscriber 101 and the subscriber 901 is restored, another channel is allocated for emergency outgoing call connection, and an operation (rotation) for continuing the call is performed.

The storage unit 402 of the PHS server 400
After the call interruption time has elapsed, the control unit 40 of the PHS server 400 continues to connect the call between the PHS subscriber 104 and the emergency special number subscriber 900.
3 is a PHS subscriber 10 stored in the storage unit 402 in advance.
1. Read the call recovery data of the subscriber 901.

The control unit 403 of the PHS server 400
After reading the data, the input / output unit 401, the control channel 2
09, a call restoration signal is sent to the control unit 204 of the CS 200. In response to this, the control unit 204 of the CS 200 transmits a call signal to the PHS subscriber 101 via the transmitting unit 202 and the antenna unit 201.

After PHS subscriber 101 receives this call signal, PHS subscriber 101 sends a recovery response signal to CS 200.

Thereafter, the antenna unit 20 of the CS 200
1. When the control unit 204 receives the restoration response signal via the receiving unit 203, the control unit 204
To allocate the call channel 206 to the PHS subscriber 101.

Also, the PHS subscriber 101 sends the CS 200
That the restoration response signal is returned to
Via the input / output unit 205, the control channel 209, and the input / output unit 401,
Report to 3. Further, if the PHS subscriber 101 has CS20
0 is controlled by the PHS server 400.
Control unit 403 informs the HLR 600.

[0085] In response to this, HLR 600 performs the location registration of PHS subscriber 101 again.

At the same time as this operation, the PHS server 400
The control unit 403 sends a call restoration signal of the subscriber 901 and the PHS subscriber 101 to the electronic exchange 800 via the input / output unit 401 and the public network 700. In response, electronic exchange 800 calls subscriber 901.

When the subscriber 901 responds, the PHS server 400 is connected to the electronic exchange 800 via the public network 700, and the PHS server 400 and the CS 200 are connected via the communication channel 206.

As described above, the subscriber 101 and the subscriber 901
Is restored.

On the other hand, another channel is allocated to continue the emergency outgoing call connection. As described above, the PHS10
Call 1 was interrupted and recovered after a certain period of time, but in this rotation channel assignment,
The other two channels, call channels 207 and 20
8 is performed.

This selection is made according to the talk time similarly to the above-mentioned talk channel assignment, but the PHS subscriber who has been interrupted once is lowered in the rotation order at the time of the next interrupt request.

Suppose PHS subscriber 101 is PHS subscriber 1
Even if the call is longer than 02 or 103, the call is interrupted once, so that when a new call interrupt request is received, the PHS subscriber 102 or 103 is forcibly interrupted.

The PHS subscribers 101, 102, 10
When the call interruption rotation of No. 3 has completed one round,
From the time of the next call interrupt request, PH
Interrupt rotation is performed in the order of the S subscribers 101, 102, and 103. In the call interruption rotation, the disconnection processing of the selected call channel and the call connection of the emergency outgoing call are all the same as the operations described above.

As long as the emergency call continues, the rotation is continued at regular intervals. When the call between the PHS subscriber 104 and the emergency special number subscriber 900 ends, the emergency outgoing call connection is disconnected and the PHS subscriber (one of 101, 102, and 103) whose communication channel is temporarily disconnected, 103 will be described as an example) and the call recovery operation of a subscriber (any of 901, 902 and 903, but here 903 will be described as an example) will be described.

When the PHS subscriber 104 ends the call, the PHS
The subscriber 104 transmits a call termination signal to the CS 200.

[0095] CS 200 sends this call end signal to control section 204 via antenna section 201 and receiving section 203. When receiving this signal, the control unit 204 sends the PHS via the input / output unit 205 and the control channel 209 to the PHS.
The information is transmitted to the input / output unit 401 and the control unit 403 of the server 400.

The PHS server 400
Receive the control channel 209,
To release (release) the communication channel 208 via the input / output unit 205, a communication channel release signal is transmitted to the control unit 204.

In response to the call channel release signal, control section 204 calls subscriber 903 on input / output section 205 via call channel 208. And subscriber 9
03 responds, the PHS server 400 switches to the public network 7
00, the PHS server 400 and the CS 200 are connected by a communication channel 208. With this operation, the call between the PHS subscriber 103 and the subscriber 903 is restored.

[0098]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention;

FIG. 3 is a diagram for explaining an embodiment of the present invention. Referring to FIG. 3, PHS subscriber 101,
The PHS subscriber 102 and the PHS subscriber 103
200 and the PHS server 400 are connected by communication channels 206, 207, and 208, respectively.
00, a call is being made with the subscribers 901, 902, and 903 via the input / output unit 401, the public network 700, and the electronic exchange 800. At this point, CS 200 is in the maximum call connection state, and there is no idle communication channel.

In this state, a call request for emergency special number subscriber 900 is newly issued from PHS subscriber 104 to CS 200. This call request is reported to the control unit 204 via the antenna unit 201 and the reception unit 203 of the CS 200, and in accordance with the call request, the control unit 204 determines that the communication channels 206, 207, and 208 are already in use. Report to PHS server 400 that there is no free call channel. This is reported from the input / output unit 401 of the PHS server 400 to the control unit 403 via the input / output unit 205 of the CS 200 and the control channel 209.

In response to this report, control unit 403 sets PH
In order to confirm whether or not the S subscriber 104 is a regular subscriber, the subscriber 200 issues a subscriber number inquiry signal of the PHS subscriber 104 to the CS 200 via the input / output unit 401 and the control channel 209.

The subscriber number inquiry signal of the PHS subscriber 104 passes through the input / output unit 205 of the CS 200,
It is sent to the control unit 204.

After receiving the subscriber number inquiry signal, control section 204 of CS 200 transmits a subscriber number inquiry signal to PHS subscriber 104 via transmitting section 202 and antenna section 201.

Upon receiving the subscriber number inquiry signal, PHS subscriber 104 immediately enters its own subscriber number into CS.
Make a call to 200. Further, the CS 200 passes through the antenna unit 201 and the receiving unit 203 to the control unit 204
The subscriber number of the PHS subscriber 104.

The control unit 204 of the CS 20 sends this subscriber number via the input / output unit 205 and the control channel 209,
The data is transmitted to the control unit 403 via the input / output unit 401 of the PHS server 400.

After receiving the subscriber number, the control unit 403 of the PHS server 400 makes an inquiry request to the HLR 600 in order to collate with the list of authorized subscriber numbers registered in the HLR 600 in advance.

The inquiry result is sent from the HLR 600 to the control unit 40.
3 reported. At this time, if the subscriber exists in the subscriber number list of the HLR 600, it is determined that the subscriber is an authorized subscriber.

For the regular subscriber, the PHS server 40
The control unit 403 of 0 compares the outgoing call connection request number sent from the PHS subscriber 104 with the emergency special number list registered in the storage unit 402 in advance.

When the outgoing call connection request from the PHS subscriber 104 is a call connection request other than the emergency special number list, the PH
The control unit 403 of the S server 400 includes the tone generation unit 40
4 is instructed to transmit a busy tone to the input / output unit 401.

In response to this, the input / output unit 401 sends a busy tone to the input / output unit 205 and the control unit 204 of the CS 200 via the control channel 209, and further transmits the busy tone.
2. A busy tone is heard to the PHS subscriber 104 via the antenna unit 201. This allows PHS subscriber 104
Knows that he cannot make a call.

In the case of a number in the emergency special number list, control unit 403 recognizes that the call request of PHS subscriber 104 is an emergency outgoing call, and that the call connection request of this outgoing call has the highest priority. , PHS subscribers 101, 102, 1
03 allocates one of the active communication channels to the emergency outgoing call of the PHS subscriber 104 by performing the following processing.

The control unit 403 of the PHS server 400
The storage unit 402 storing the total talk time of the PHS subscribers 101, 102, and 103 is searched for the subscriber having the longest talk time among the PHS subscribers.

Assuming that PHS subscriber 101 has the longest talk time, the subsequent operation will be described.

The control unit 403 of the PHS server 400
From the announcement 500, an emergency call interruption interrupt is sent to the input / output unit 205 via the input / output unit 401 and the communication channel 206.

At the same time, the control unit 4 of the PHS server 400
03 denotes an input / output unit 401, a control channel 209, CS
200 to the control unit 204 via the input / output unit 205
It instructs the HS subscriber 101 to transmit an emergency outgoing call interruption announcement from the announcement 500.

As a result, the control unit 204 of the CS 200
Transmits an emergency call interrupt interrupt announcement from the announcement 500 to the PHS subscriber 101 via the transmission unit 202 and the antenna unit 201.

When the PHS subscriber 101 hears this announcement, it recognizes that the call is temporarily forcibly disconnected due to an emergency outgoing call.

On the other hand, to inform the subscriber 901 that a call interruption by the emergency calling subscriber occurs on the PHS subscriber 101 side and the call is temporarily forcibly cut off,
The control unit 403 of the S server 400 includes an input / output unit 401,
Via the public network 700, an emergency outgoing call interrupt announcement from the announcement 500 is sent to the electronic exchange 800, and the electronic exchange 800 sends a call interrupt announcement to the subscriber 901. Thus, the subscriber 901 recognizes that the call is temporarily disconnected due to the call interruption of the emergency outgoing call.

Next, a call disconnection operation is performed.

[0120] The control unit 403 of the PHS server 400
For the control unit 204 of the CS 200, an input / output unit 401,
Through the control channel 209 and the input / output unit 205, the PH
In order to forcibly disconnect the communication channel 206 used by the S subscriber 101, a disconnection signal is transmitted. When the control unit 204 receives this disconnection signal, the control unit 204 issues an instruction to disconnect the communication channel 206 to the input / output unit 205.

The control unit 403 of the PHS server 400
Simultaneously with the above operation, a disconnection signal is sent to the electronic exchange 800 via the input / output unit 401 and the public network 700 in order to temporarily disconnect the call between the subscriber 901 and the PHS subscriber 101.

Upon receiving the disconnection signal, electronic exchange 800
Disconnects the call of the subscriber 901. By this operation,
The call between the PHS subscriber 101 and the subscriber 901 is disconnected.

After disconnecting the call, control unit 204 of CS 200
Are input / output unit 205, control channel 209, input / output unit 401 to control unit 403 of PHS server 400.
And sends a call disconnection completion signal via the.

When the control unit 403 of the PHS server 400 receives this signal, the control unit 403 sends an emergency message to the control unit 204 of the CS 200 via the input / output unit 401, the control channel 209, and the input / output unit 205. An outgoing call connection request signal is sent.

The control unit 40 of the PHS server 400
Reference numeral 3 denotes data used for restoring a call between the PHS subscriber 101 and the subscriber 901 in the storage unit 402 when the emergency call interruption is terminated, the used call channel number (call channel 206) before the interruption, and the call recovery. A subscriber telephone number (PHS subscriber 101, subscriber 901), a call interruption start time, a call interruption end time, and a call accumulation time are stored.

The control unit 40 of the PHS server 400
No. 3 registers the location of the PHS subscriber 101 before the call disconnection in the HLR 600, and stores that the CS 200 is in charge of the control.

Next, a call connection operation between the PHS subscriber 104 and the emergency special number subscriber 900 is performed using the channel which has become vacant due to the disconnection.

The control unit 204 of the CS 200 transmits an emergency outgoing call connection request signal via the transmitting unit 202 and the antenna unit 201. When the PHS subscriber 104 receives the emergency outgoing call connection request signal, the PHS subscriber 104 waits for a response from the emergency special number subscriber 900 described below.

On the other hand, the PHS server 400
03, an input / output unit 401 and an emergency outgoing call connection request signal from the PHS subscriber 104 to the emergency special number subscriber 900 to the electronic exchange 800 via the public network 700.

In response, electronic exchange 800 calls emergency special number subscriber 900 and, when emergency special number subscriber 900 responds, makes a call via public network 700. As a result, a call between the PHS subscriber 104 and the emergency special number subscriber 900 is started.

If the talk time is long, the PHS
The call between the subscriber 101 and the subscriber 901 is restored, another channel is allocated for emergency call connection, and an operation (rotation) for continuing the call is performed.

If the call between the PHS subscriber 104 and the emergency special number subscriber 900 continues even after the call interruption time previously registered in the storage unit 402 of the PHS server 400 has elapsed, the control of the PHS server 400 is performed. The unit 403 stores the PHS subscriber 1 stored in the storage unit 402.
01, the call recovery data of the subscriber 901 is read.

The control unit 403 of the PHS server 400
After reading the data, the input / output unit 401, the control channel 2
09, a call recovery signal is sent to the control unit 204 of the CS 200. In response to this, the control unit 204 sends a call signal to the PHS subscriber 101 via the transmitting unit 202 and the antenna unit 201.

After the PHS subscriber 101 receives this call signal, the PHS subscriber 101 sends a restoration response signal to the CS 200. After this, the antenna unit 20
1. When the control unit 204 receives the restoration response signal via the receiving unit 203, the control unit 204 instructs the input / output unit 205 to allocate the communication channel 206 to the PHS subscriber 101.

Also, the PHS subscriber 101 sends the CS 200
That the restoration response signal is returned to
Denotes an input / output unit 205, a control channel 209, and an input / output unit 4
01 to the control unit 403 of the PHS server 400.

Further, the control unit 403 of the PHS server 400 notifies the HLR 600 that the PHS subscriber 101 is controlled by the CS 200. In response to this, the HLR 600 performs the location registration of the PHS subscriber 101 again.

At the same time as this operation, the control unit 403 of the PHS server 400 sends the input / output unit 401 and the public network 70
0 and the subscriber 901 and the PH to the electronic exchange 800.
A call restoration signal for the S subscriber 101 is issued. Upon receiving the call restoration signal, electronic exchange 800 calls subscriber 901.

When the subscriber 901 responds, the PHS server 400 is connected to the electronic exchange 800 via the public network 700, and the PHS server 400 and the CS 200 are connected via the communication channel 206.

As described above, the call between the subscriber 101 and the subscriber 901 is restored.

Next, a description will be given of a process of restoring a call with the subscriber 901 by handover when the PHS subscriber 101 moves outside the control area of the CS 200.

The control unit 403 of the PHS server 400
The call recovery data of the PHS subscriber 101 and the subscriber 901 stored in the storage unit 402 is read out. After the data is read, a call recovery signal is sent to the control unit 204 via the input / output unit 401 and the control channel 209.
Upon receiving the call restoration signal, the control unit 204 of the CS 200 transmits a call signal to the PHS subscriber 101 via the transmission unit 202 and the antenna unit 201.

At this time, the PHS subscriber 101 has already
The mobile terminal 200 moves out of the control area of 200 and cannot receive the call signal transmitted from the CS 200.

If the PHS subscriber 101 does not return the recovery response signal within a predetermined time after the PHS subscriber 101 returns to the CS 200 after transmitting the call signal, the control unit 204 of the CS 200 controls its own control area. Recognize that you have moved out.

The CS 200 immediately sends this report to the control unit 4 of the PHS server 400 via the control unit 204, the input / output unit 205, the control channel 209, and the input / output unit 401.
Notify 03.

In response to this, the PHS server 400
In order to ascertain where the PHS subscriber 101 has moved to, all Cs controlled by the PHS server 400
A general paging signal is transmitted to PHS subscriber 101 by the following operation to S (here, CS200 and CS300).

[0146] The control unit 403 of the PHS server 400
A general call signal is sent to the input / output unit 401. In response to this, the input / output unit 401 converts the general call signal into
For all CSs, the data is transmitted to the control units 204 and 304 via the control channels 209 and 309 and the input / output units 205 and 305.

[0147] In response to this, the transmitting units 202 and 302 of the CS 200 and CS 300 transmit the signals to the PHS subscriber 101 via the antenna units 201 and 301.

Upon receiving the paging signal sent from CS 300, PHS subscriber 101 sends a recovery response signal to CS 300. This restoration response signal is
When the control unit 304 of S300 receives the data, the control unit 304
Via the input / output unit 305, the control channel 309, and the input / output unit 401 of the PHS server 400,
3 reports that the PHS subscriber 101 is in the control area of the CS 300.

In response to this report, PHS server 400
The control unit 403 notifies the HLR 600 that the PHS subscriber 101 is controlled by the CS 300.
In response to this, the HLR 600 performs location registration of the PHS subscriber 101.

At the same time as this operation, the PHS server 400
Control 403 reads out the call recovery data of the PHS subscriber 101 and the subscriber 901 evacuated to the storage 402,
The data using the communication channel 206 of the CS 200 is deleted.

Next, the control unit 304 of the CS 300 searches for a free communication channel (here, it is assumed that the communication channel 306 is a free channel), and instructs to allocate the communication channel 306 to the PHS subscriber 101. .

The control unit 40 of the PHS server 400
Reference numeral 3 sends a call restoration signal of the subscriber 901 and the PHS subscriber 101 to the electronic exchange 800 via the input / output unit 401 and the public network 700. Upon receiving the call restoration signal, electronic exchange 800 calls subscriber 901.

When the subscriber 901 responds, the PHS server 400 is connected to the electronic exchange 800 via the public network 700, and the PHS server 400 and the CS 300 are connected via the communication channel 306.

As described above, the call between the subscriber 101 and the subscriber 901 is restored again.

On the other hand, another channel is allocated for continuing the emergency outgoing call connection. As described above, the PHS 101
Call was interrupted and recovered after a certain period of time, but in this rotation channel assignment, the other two channels, call channel 207,
208. This selection is made based on the talk time, similar to the call channel assignment described above,
Once interrupted, the PHS subscriber is lowered in the rotation order at the time of the next interrupt request.

It is assumed that PHS subscriber 101 is PHS subscriber 1
Even if the user talks longer than 02 or 103, the call is interrupted once, so that when a new call interrupt request is received, the PHS subscriber 102 or 103 is forcibly interrupted.

The PHS subscribers 101, 102, 10
When the call interruption rotation of No. 3 has completed one round,
From the time of the next call interrupt request, PH
Interrupt rotation is performed in the order of the S subscribers 101, 102, and 103.

In the call interruption rotation, the disconnection processing of the selected call channel and the call connection of the emergency outgoing call are the same as those described above.

As long as the emergency call continues, the rotation is continued at regular intervals.

When the communication between the PHS subscriber 104 and the emergency special number subscriber 900 is completed, the emergency outgoing call connection is disconnected and the PHS subscriber (101, 102, 103, Here 10
3 will be described as an example) and the operation of the subscriber 901 will be described.

When PHS subscriber 104 ends the call, the PHS
The subscriber 104 transmits a call termination signal to the CS 200. The CS 200 transmits this signal to the antenna unit 201,
The data is transmitted to the control unit 204 via the reception unit 203. CS
Upon receiving this signal, the control unit 204 of the 200 transmits the signal to the input / output unit 401 and the control unit 403 of the PHS server 400 via the input / output unit 205 and the control channel 209.

When this signal is received by the control unit 403 of the PHS server 400, the control unit 209 sends a communication channel release signal to the control unit 204 via the control channel 209 and the input / output unit 205 to release the communication channel 208.

In response to this, control unit 204 of CS 200
Opens the communication channel 208 to the input / output unit 205.

When the emergency special number subscriber 900 ends the call, the electronic exchange 800 sends the PH
A call disconnection signal is sent to S server 400.

The call disconnection signal is transmitted to the PHS server 40.
When the control unit 403 receives the call disconnection completion signal via the input / output unit 401 of the
1. The data is sent to the electronic exchange 800 via the public network 700.

As a result, the call interruption processing by the PHS subscriber 104 and the emergency special number subscriber 900 ends.

Next, the PHS subscriber 103 and the subscriber 903
Will be described. PHS server 40
0 of the PHS subscriber 10 in the storage unit 402
3. Read the call recovery data of the subscriber 903. After reading the data, the input / output unit 401, the control channel 209
Via the PHS to the control unit 204 of the CS 200
A call restoration signal is sent to the subscriber 103. Upon receiving the call restoration signal, the control unit 204 of the CS 200
2. A call signal is transmitted to the PHS subscriber 103 via the antenna unit 201. PHS subscriber 103
Responds after receiving this call signal,
The S subscriber 103 sends a response signal to the CS 200.

After that, the antenna unit 20 of the CS 200
1. When the control unit 204 receives this response signal via the receiving unit 203, the control unit 204 instructs the input / output unit 205 to allocate the communication channel 208 to the PHS subscriber 103.

Also, the PHS subscriber 103 sends the CS 200
That the response signal is returned to the control unit 204
Via the input / output unit 205, the control channel 209, and the input / output unit 401,
Report to 3.

As a result, the PHS subscriber 103 receives CS2
00 is in charge of control, the PHS server 40
The control unit 403 of 0 notifies the HLR 600. In response to this, the HLR 600 performs the location registration of the PHS subscriber 103 again. At the same time as this operation, the PHS server 4
00, the input / output unit 401, the public network 700
, And the subscriber 903 and the PHS
A call restoration signal of the subscriber 103 is transmitted.

In response, electronic exchange 800 calls subscriber 903. When subscriber 903 responds, PH
The S server 400 is connected to the electronic exchange 800 via the public network 700, and is connected to the PHS server 400 and the CS20.
Connections between 0 are connected by a communication channel 208. With this operation, the call between the PHS subscriber 103 and the subscriber 903 is restored.

Next, the operation of the embodiment of the present invention will be described in detail with reference to FIGS. FIG. 4 is a flowchart for explaining the operation of one embodiment of the present invention.

Referring to FIG. 2, PHS subscribers 101, 1
02 and 103 are communication channels 206, 207, and 208 between the CS 200 and the PHS server 400 at present.
Connected to the input / output unit 40 inside the PHS server 400
1. Talking with subscribers 901, 902, and 903 via public network 700 and electronic exchange 800.

At this stage, CS 200 is in the maximum call connection state and there is no idle communication channel.

In this state, a call request is newly issued from PHS subscriber 104 to CS 200 to CS 200 (step S1).

This request is reported to the control unit 204 via the antenna unit 201 and the reception unit 203 inside the CS 200, and together with this call request, the control unit 204 of the CS 200
Reports to the PHS server 400 that the communication channels 206, 207, 208 are already in use and there are no free communication channels.

The CS 200 reports to the control unit 403 from the input / output unit 401 of the PHS server 400 via the input / output unit 205 and the control channel 209.

In response to this, the control unit 403 of the PHS server 400 checks the CS 200 via the input / output unit 401 and the control channel 209 to confirm whether the PHS subscriber 104 is a regular subscriber. And issues a subscriber number inquiry signal of the PHS subscriber 104 (step S
2).

This signal is sent to the control unit 204 via the input / output unit 205. The control unit 204 of the CS 200
After receiving this signal, it transmits a subscriber number inquiry signal to PHS subscriber 104 via transmitting section 202 and antenna section 201.

Upon receiving this signal, PHS subscriber 104 immediately transmits its own subscriber number to CS 200. Further, the CS 200 sends the PH to the control unit 204 of the CS 200 via the antenna unit 201 and the receiving unit 203.
The subscriber number of the S subscriber 104 is sent.

The control unit 204 of the CS 200 includes the input / output unit 2
05, PHS server 4 via control channel 209
The subscriber number is sent to the control unit 403 via the input / output unit 401 of the "00".

The control unit 403 of the PHS server 400
After receiving this subscriber number, the HLR 600 is checked in order to compare it with a list of authorized subscriber numbers registered in the HLR 600 in advance.
Make an inquiry request to. The inquiry result is reported from the HLR 600 to the control unit 403. At this time, if the subscriber exists in the subscriber number list of the HLR 600, it is determined that the subscriber is a regular subscriber (step S3).

Next, the PHS subscriber 104 sets the HLR 600
As a result of the inquiry, the control unit 204 stops the outgoing call connection request processing of the PHS subscriber 104 (steps S3 and S5).

For the regular subscriber, the PHS server 4
The control unit 403 checks the outgoing call connection request number sent from the PHS subscriber 104 against the emergency special number list registered in the storage unit 402 (step S4,
S6).

When the outgoing call connection request from PHS subscriber 104 is a connection request other than the emergency special number list, control unit 403 of PHS server 400 sends a busy tone to tone generation unit 404 and to input / output unit 401. (Step S8).

In response, input / output section 401 sends a busy tone to input / output section 205 and control section 204 of CS 200 via control channel 209,
2. A busy tone is heard from the PHS subscriber 104 via the antenna unit 201 (step S8).

Thus, the PHS subscriber 104 knows that the call cannot be made.

In the case of a number existing in the emergency special number list,
The control unit 403 recognizes that the call request of the PHS subscriber 104 is an emergency outgoing call, and recognizes that the connection request of the outgoing call is given the highest priority.
The following processing is performed in order to allocate one of the communication channels being used by 1, 102 and 103 to the emergency outgoing call of the PHS subscriber 104.

The control unit 403 includes PHS subscribers 101 and 10
The storage unit 402 storing the total talk time of 2, 103 is searched for the subscriber having the longest talk time among the PHS subscribers (steps S7, S9). Here, assuming that the PHS subscriber 101 has the longest talk time, the subsequent operation will be described.

The control unit 403 of the PHS server 400
From the announcement 500, an emergency call interruption interrupt is sent to the input / output unit 205 via the input / output unit 401 and the communication channel 206 (step S10).

The control unit 403 of the PHS server 400
Input / output unit 401, control channel 209, input / output unit 20
5, the control unit 204 of the CS 200 is instructed to transmit an interrupt announcement from the announcement 500 to the PHS subscriber 101 (step S1).
0). As a result, the control unit 204 transmits an interrupt announcement from the announcement 500 to the PHS subscriber 101 via the transmission unit 202 and the antenna unit 201 (step S10).

When the PHS subscriber 101 hears this announcement, it recognizes that the call is temporarily disconnected due to an emergency outgoing call.

On the other hand, in order to notify that a call interruption by the emergency calling subscriber occurs on the PHS subscriber 101 side and the call is temporarily forcibly cut off, the control unit 403 of the PHS server 400 controls the input / output unit 401 and the public network 700. , A call interruption announcement from the announcement 500 is sent to the electronic exchange 800, and the electronic exchange 800 sends a call interruption announcement to the subscriber 901. Thereby, the subscriber 901 recognizes that the call is disconnected due to the call interruption of the emergency call (step S1).
0).

Next, the operation of the call interruption will be described.

The control unit 403 of the PHS server 400
For the control unit 204 of the CS 200, an input / output unit 401,
Through the control channel 209 and the input / output unit 205, the PH
A disconnection signal is transmitted to forcibly disconnect the communication channel 206 used by the S subscriber 101. This signal is
When the control unit 204 of S200 receives the message, the control unit 204
Issues an instruction to disconnect the communication channel 206 to the input / output unit 205 (step S11).

The control unit 403 of the PHS server 400
At the same time as the above operation, a disconnection signal is sent to the electronic exchange 800 via the input / output unit 401 and the public network 700 to temporarily disconnect the call between the subscriber 901 and the PHS subscriber 101.

Receiving this disconnection number, electronic exchange 800
Disconnects the call of the subscriber 901. By this operation,
The call between the PHS subscriber 101 and the subscriber 901 is disconnected (step S11). Thereby, the PHS subscriber 10
The channel for the call interruption of No. 4 is reserved.

After disconnecting the call, control unit 204 of CS 200
Are input / output unit 205, control channel 209, input / output unit 401 to control unit 403 of PHS server 400.
And sends a call disconnection completion signal via the.

When the control unit 403 of the PHS server 400 receives this signal, the control unit 403 sends an emergency call to the control unit 204 of the CS 200 via the input / output unit 401, the control channel 209, and the input / output unit 205. A call connection request signal is transmitted (step S12).

Then, the control unit 4 of the PHS server 400
03 is stored in the storage unit 402 as evacuation data for call recovery between the PHS subscriber 101 and the subscriber 901 when the call interruption is completed, the used call channel number (call channel 206) before the interruption, and the call restoration subscriber. The telephone number (PHS subscriber 101, subscriber 901), call interruption start time, call interruption end time, and call accumulation time are stored.

The control unit 40 of the PHS server 400
3, the HLR 600 registers the location of the PHS subscriber 101 before the call disconnection, and stores that the CS 200 has been in charge of the control (step S13).

Next, the communication channel 206 vacated by the disconnection of the call is transferred to the control unit 204 of the CS 200.
Is assigned as the communication channel of the PHS subscriber 104. The control unit 204 transmits an emergency outgoing call connection request from the PHS server 400 to the transmitting unit 202 and the antenna unit 201.
To the PHS subscriber 104 via.

When this signal is received by PHS subscriber 104, it enters a state of waiting for a response from emergency special subscriber 900 described below. Meanwhile, at the same time, the PHS server 400 sends an emergency outgoing call connection request for the emergency special number subscriber 900 from the PHS subscriber 104 to the electronic switching network 800 via the control unit 403, the input / output unit 401, and the public network 700. Give a signal.

[0204] In response, electronic exchange 800 calls emergency special number subscriber 900, and when emergency special number subscriber 900 answers, makes a call connection via public network 700. As a result, a call between the PHS subscriber 104 and the emergency special number subscriber 900 is started (step S14).

As the next operation, the PHS server 40
0, when the call between the PHS subscriber 104 and the emergency special number subscriber 900 continues even after the call interruption time elapses, the PHS subscriber 101 and the subscriber 901 are temporarily stopped. Restore call.

For this reason, the control section 403 of the PHS server 400 reads out the call recovery data of the PHS subscriber 101 and the subscriber 901 from the storage section 402 (step S1).
6).

After reading the data, the control unit 204 of the CS 200 passes through the input / output unit 401 and the control channel 209.
Sends a call restoration signal to the PHS subscriber 101. In response to this, the control unit 204 transmits the signal to the PHS subscriber 101 via the transmitting unit 202 and the antenna unit 201.
This call restoration signal is transmitted (step S17).

After PHS subscriber 101 receives the call restoration signal, PHS subscriber 101 sends a restoration response signal to CS 200.

Thereafter, the antenna unit 201 and the receiving unit 20
3, when the control unit 204 receives this signal,
The control unit 204 provides the input / output unit 205 with the call channel 20.
6 is assigned to the PHS subscriber 101.

Further, the PHS subscriber 101 sends the CS 200
That the response signal is returned to the control unit 204
The control unit 403 of the PHS server 400 passes through the input / output unit 205, the control channel 209, and the input / output unit 401.
Report to Further, the PHS subscriber 101 notifies the CS 200 that it is in charge of the control, and the control unit 403 notifies the HLR 6
Notify 00. In response, the HLR 600
The location registration of the subscriber 101 is performed again.

At the same time as this operation, the PHS server 400
The control unit 403 sends a call restoration signal of the subscriber 901 and the PHS subscriber 101 to the electronic exchange 800 via the input / output unit 401 and the public network 700. In response, electronic exchange 800 calls subscriber 901. When the subscriber 901 responds, the PHS server 400 is connected to the electronic exchange 800 via the public network 700 and the PHS server 40
0 and the CS 200 are connected by a communication channel 206.

With this, the PHS subscriber 101 and the subscriber 901
Is restored (step S17).

On the other hand, in order to continue the emergency outgoing call connection request, the control unit 403 of the PHS server 400 performs the next call interruption rotation as follows, similarly to the above-described call interruption.

The control unit 403 of the PHS server 400
The total call time saved in the storage unit 402 is searched, and the PHS subscriber 102 and the PHS subscriber 103
Find out which one has the longer talk time. After searching, temporarily
It is assumed that the HS subscriber 102 has a long talk time (steps S18, S7, S9).

[0215] The PHS server 400 control unit 403 sends an emergency outgoing call interrupt announcement to the announcement 500 to the input / output unit 205 via the input / output unit 401 and the call channel 207 in the same manner as described above.

The control section 403 of the PHS server 400
Sends an interrupt announcement from the announcement 500 to the PHS subscriber 102 to the control unit 204 via the input / output unit 401, the control channel 209, and the input / output unit 205. As a result, the control unit 204 sends the call interruption announcement being sent from the announcement 500 to the transmission unit 202 and the antenna unit 201 via the call channel 207 and the input / output unit 205.

As a result, the antenna unit 201
The announcement is sent to the subscriber 102. When the PHS subscriber 102 hears this announcement, it recognizes that the call is temporarily disconnected due to an emergency outgoing call (step S10).

As the next operation, the control unit 403 controls the input / output unit 401 to notify the subscriber 902 that a call interruption by the emergency calling subscriber occurs on the PHS subscriber 102 side and the call is temporarily disconnected. Then, a call interruption announcement from the announcement 500 is transmitted to the electronic exchange 800 via the public network 700. Electronic exchange 800
Sends a call interruption announcement to the subscriber 902. Thereby, the subscriber 902 recognizes that the call is temporarily disconnected due to the call interruption of the emergency call (step S10).

Next, the operation of the call interruption will be described. PH
The control unit 403 of the S server 400 sends an input / output unit 401 and a control channel 2 to the control unit 204 of the CS 200.
09, a disconnection signal is transmitted via the input / output unit 205 to forcibly disconnect the communication channel 207 used by the PHS subscriber 102.

The disconnection signal is sent to the control unit 204 of the CS 200.
Is received, the control unit 204 instructs the input / output unit 205 to disconnect the call to the call channel 207.

[0221] The control unit 403 of the PHS server 400
As in the above operation, a disconnection signal is sent to the electronic exchange 800 via the input / output unit 401 and the public network 700 to temporarily disconnect the call between the subscriber 902 and the PHS subscriber 102.

Upon receiving this disconnection signal, electronic exchange 800 disconnects the call from subscriber 902 (step S11).

With the above operation, the call between the PHS subscriber 102 and the subscriber 902 is disconnected, and the call interruption channel of the emergency calling subscriber 104 is secured.

The call interruption is rotated from the PHS subscriber 101 to the PHS subscriber 102, and the communication channel is changed from 206 to 207.

As the next operation, similar to the above-described operation,
PHS subscriber 102 and subscriber 9 at the end of call interruption
As a data save at the time of the call restoration of the call 02, the control unit 403 of the PHS server 400 stores the used call channel number before the interruption (the call channel 20) in the storage unit 402.
7), call recovery subscriber telephone number (PHS subscriber 102,
The subscriber 902) stores the call interruption start time, the call interruption end time, and the call accumulated time.

The control unit 40 of the PHS server 400
3, the HLR 600 registers the location of the PHS subscriber 102 before the call is disconnected, and stores that the CS 200 has been in charge of the control (step S13).

At the same time as this operation, the PHS server 400
Is transmitted to the electronic exchange 800 via the control unit 403, the input / output unit 401, and the public network 700.
The emergency outgoing call connection request signal is transmitted again.

In response, electronic exchange 800 again connects the call with emergency special number subscriber 900. By this operation,
The interrupt rotation to the PHS subscriber 102 is completed, and the emergency outgoing call is continued (step S1).
4).

As the next operation, the call between the PHS subscriber 104 and the emergency special number subscriber 900 is continuing even after the interruption time has elapsed (step S15), and the call interruption between the PHS subscriber 102 and the subscriber 902 is temporarily terminated. Next, an operation for newly performing a call interruption rotation will be described.

First, the PHS subscriber 102 and the subscriber 902
The control unit 403 of the PHS server 400 reads the call recovery data of the PHS subscriber 102 and the subscriber 902 from the storage unit 402 in order to restore the call (step S1).
6).

After reading the data, the PHS is sent to the control unit 204 via the input / output unit 401 and the control channel 209.
A call restoration signal is sent to the subscriber 102. In response,
The control unit 204 sends this signal to the PHS subscriber 102 via the transmitting unit 202 and the antenna unit 201 (step S17).

After the PHS subscriber 102 receives this signal, the PHS subscriber 102 sends a recovery response signal to the CS 200. Thereafter, when the control unit 204 of the CS 200 receives this signal via the antenna unit 201 and the reception unit 203, the control unit 204 instructs the input / output unit 205 to allocate the communication channel 207 to the PHS subscriber 102.

Also, the PHS subscriber 102 sends the CS 200
That the restoration response signal is returned toward
4 is a control unit 403 of the PHS server 400 via the input / output unit 205, the control channel 209, and the input / output unit 401.
Report to Further, the control unit 403 of the PHS server 400 notifies the HLR 600 that the PHS subscriber 102 is in charge of the control of the CS 200. In response, H
The LR 600 performs the location registration of the PHS subscriber 102 again.

At the same time as this operation, the PHS server 400
The control unit 403 sends a call restoration signal of the subscriber 902 and the PHS subscriber 102 to the electronic exchange 800 via the input / output unit 401 and the public network 700.

In response to this, the electronic exchange 800 sets the subscriber 90
Call 2. When the subscriber 902 responds, the PHS server 400 sends the electronic exchange 80 via the public network 700.
0, and the PHS server 400 and the CS 200 are connected by a communication channel 207.

With this, the PHS subscriber 102 and the subscriber 902
Is restored (step S17).

As the next operation, the control unit 403 of the PHS server 400 searches the accumulated call time stored in the storage unit 402, and instructs the subscriber having the longest call time to interrupt the call. The accumulated call time data is searched from 402, but since the PHS subscriber 101 and the PHS subscriber 102 have already executed the call interruption once,
The PHS subscriber 103 for whom the call interruption has not been performed is forcibly targeted for interruption (steps S18 and S19).

The control unit 403 of the PHS server 400
As described above, an emergency call interrupt notification is sent to the announcement 500 to the input / output unit 205 via the input / output unit 401 and the communication channel 208 (step S).
10).

The control unit 403 of the PHS server 400
Via the input / output unit 401, the control channel 209, and the input / output unit 205, the control unit 204 instructs the PHS subscriber 103 to transmit an interrupt announcement from the announcement 500. As a result, the control unit 204 of the CS 200 sends the call interruption announcement from the announcement 500 to the transmission unit 202 and the antenna unit 201 via the call channel 208 and the input / output unit 205 (step S1).
0).

[0240] Thereby, the antenna section 201 sends out this announcement to the PHS subscriber 103 (step S10). When the PHS subscriber 103 hears this announcement, it recognizes that the call is temporarily disconnected due to an emergency outgoing call.

As the next operation, the subscriber 903 receives the PHS
In order to notify the subscriber 103 that a call interruption by the emergency calling subscriber occurs and the call is temporarily forcibly disconnected, the PHS
The control unit 403 of the server 400 sends a call interruption announcement from the announcement 500 to the electronic exchange 800 via the input / output unit 401 and the public network 700, and the electronic exchange 800 issues a call interruption announcement to the subscriber 903. It is sent (step S10).

As a result, the subscriber 903 recognizes that the call is interrupted due to the call interruption of the emergency outgoing call.

Next, the operation of the call interruption will be described.

The control unit 403 of the PHS server 400
For the control unit 204 of the CS 200, an input / output unit 401,
Through the control channel 209 and the input / output unit 205, the PH
A forced disconnection signal is transmitted to the communication channel 208 used by the S subscriber 103 (step S11).

When the control unit 204 of the CS 200 receives this forced disconnection signal, the control unit 204
5 is instructed to disconnect the call to the call channel 208 (step S11).

As a result, PHS subscriber 103 and subscriber 9
03 call is disconnected. By the above operation, the call interruption channel of the PHS subscriber 104 is secured, the call interruption is rotated from the PHS subscriber 102 to the PHS subscriber 103, and the communication channel is changed from 207 to 20.
Changed to 8.

As the next operation, the PHS server 400 saves the data when the call is restored between the PHS subscriber 103 and the subscriber 903 at the end of the interruption as in the above-described operation.
The control unit 403 of the storage unit 402 uses the call channel number (call channel 208) and the call recovery subscriber telephone number (PHS subscriber 103, subscriber 90) before interrupting the storage unit 402.
3), call interruption start time, call interruption end time,
Call accumulation time is stored.

The control unit 40 of the PHS server 400
3, the HLR 600 registers the location of the PHS subscriber 103 before the call is disconnected, and stores that the CS 200 has been in charge of control (step S13).

At the same time as this operation, the PHS server 400
The PHS subscriber 104 is sent to the electronic exchange 800 via the control unit 403, the input / output unit 401, and the public network 700.
Again transmits the emergency outgoing call connection request signal (step S
12).

Upon receiving the emergency outgoing call connection request signal, electronic exchange 800 again connects the call with emergency special number subscriber 900. Thereby, the call interruption rotation to the PHS subscriber 103 is completed, and the call of the emergency outgoing call is continued (step S14).

With the above operation, the first call interruption rotation has completed one round (step S18).

When the call interruption rotation has completed one cycle, the call interruption rotation is performed in the order of the PHS subscribers 101 → 102 → 103 regardless of the talk time from the next call interruption request.

Next, the operation when the call between the PHS subscriber 104 and the emergency special number subscriber 900 ends will be described.

When PHS subscriber 104 ends the call, the PHS
The subscriber 104 transmits a call termination signal to the CS 200 (steps S15 and S20). CS 200 transmits this signal to control section 204 via antenna section 201 and receiving section 203.

Upon receiving this signal, the control unit 204 of the CS 200 transmits the signal to the input / output unit 401 and the control unit 403 of the PHS server 400 via the input / output unit 205 and the control channel 209. This signal is sent to the PHS server 40
0 is received by the control unit 403 of the control channel 20.
9. To release the communication channel 208 via the input / output unit 205, a communication channel release signal is sent to the control unit 204.
(Step S20).

Upon receiving the call channel release signal, CS
The control unit 204 of 200 opens the communication channel 208 to the input / output unit 205. Emergency special number subscriber 900
Is terminated, the electronic exchange 800 switches to the public network 700.
, And sends a call disconnection signal to the PHS server 400 (step S21).

The call disconnection signal is transmitted to the PHS server 400.
The control unit 403 receives a call disconnection completion signal via the input / output unit 40 via the input / output unit 401 of the
1. The data is sent to the electronic exchange 800 via the public network 700.

As a result, the call interruption processing by the PHS subscriber 104 and the emergency special number subscriber 900 ends (call disconnection), and the call interruption rotation ends (step S21).

A description will be given of the call restoration operation between the PHS subscriber 103 and the subscriber 903.

[0260] The control unit 403 of the PHS server 400
The call recovery data of the PHS subscriber 103 and the subscriber 903 is read from the storage unit 402 (step S22).

After reading the data, the control unit 204 is sent to the control unit 204 via the input / output unit 401 and the control channel 209.
A call restoration signal is sent to the S subscriber 103. In response, control section 204 of CS 200 transmits a call signal to PHS subscriber 103 via transmitting section 202 and antenna section 201.

After PHS subscriber 103 receives this signal, responding PHS subscriber 103 sends a recovery response signal to CS 200.

[0263] In response to this, the control unit 204 receives the restoration response signal via the antenna unit 201 and the receiving unit 203, and the control unit 204 transmits the communication channel 208 to the input / output unit 205 to the PHS subscriber 103. To be assigned to

Also, the PHS subscriber 103 sends the CS 200
To the control unit 204 that the
Denotes an input / output unit 205, a control channel 209, and an input / output unit 4
01 to the control unit of the PHS server 400. As a result, the PHS subscriber 103 notifies the HLR 600 that the CS 200 is in charge of the control. In response, the HLR 600 sets PHS subscriber 1
03 location registration is performed again.

At the same time as this operation, the PHS server 400
The control unit 403 sends a call restoration signal of the subscriber 903 and the PHS subscriber 103 to the electronic exchange 800 via the input / output unit 401 and the public network 700. Electronic exchange 8
00 calls the subscriber 903.

When subscriber 903 responds, PHS server 400 is connected to electronic exchange 800 via public network 700, and PHS server 400 and CS 200 are connected by communication channel 208. By the above operation, PHS
The call between the subscriber 103 and the subscriber 903 is restored (step S23).

Next, with respect to the above-mentioned embodiment of the present invention,
A modified example will be described.

As described in the description of the operation of the above embodiment, the call interruption rotation is based on the call time of the interrupted PHS subscriber (the subscriber with the longest call time) (step S9 in FIG. 4). As a first and a second modification of the rotation, there is a method in which the call interruption rotation is sequentially rotated from the youngest or the oldest one of the communication channels, and the rotation is sequentially repeated.

A third modification of the present rotation is a method in which a call interruption is made random and interrupted without regularity.

As a fourth and a fifth modified example, a method of sequentially interrupting the call interruption rotation from the youngest number of the communication channel and making a round, and then rotating sequentially from the oldest number, and vice versa. This is a method in which interrupts are sequentially performed from the first number, and after one round, rotation is sequentially performed from the next lowest number.

The sixth modification is a method of fixing the interrupt call channel without rotating the call interrupt.

[0272]

As described above, according to the present invention,
The following effects are obtained.

A first effect of the present invention is that when an emergency outgoing call connection request such as police or fire is made, a call to an emergency special number can be made with the highest priority even when the CS communication channel is congested. That is.

The reason is that the present invention has a function of making a call by temporarily interrupting the call to the CS call channel in use.

A second effect of the present invention is that a call interruption can be made to a CS call channel in use without registering a call interruption service of an emergency outgoing call in advance.

As a result, according to the present invention, at the time of an emergency outgoing call connection request, anyone, even if not the service holder, can make an emergency call at any time, and has an effect of promptly responding to an emergency.

The reason is that, in the present invention, when an emergency outgoing call connection request such as police or fire is made,
This is because the CS communication channel in use is provided with a function for interrupting the call.

A third effect of the present invention is to solve the problem that the subscriber who is interrupted by the call is not fixed, so that the call cannot be made until the emergency call is completed.

[0279] The reason is that, in the present invention, the call interrupting subscribers are rotated one by one at predetermined time intervals, and the call interrupting subscribers are not fixed.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a configuration of an embodiment of the present invention.

FIG. 2 is a diagram illustrating an operation of the exemplary embodiment of the present invention.

FIG. 3 is a diagram illustrating the configuration of an embodiment of the present invention.

FIG. 4 is a flowchart for explaining the operation of one embodiment of the present invention.

[Explanation of symbols]

101, 102, 103, 104 PHS subscriber 200, 300 Cell station (CS) 201, 301 Antenna unit 202, 302 Transmitting unit 203, 303 Receiving unit 204, 304 Control unit 205, 305 Input / output unit 206, 207, 208, 306, 307, 308 Call channel 209, 309 Control channel 400 PHS server 401 Input / output unit 402 Storage unit 403 Control unit 404 Tone generation unit 500 Announcement 600 Home location register (HLR) 700 Public network 800 Electronic exchange 900 Emergency special subscriber 901, 902, 903 subscribers

Claims (4)

(57) [Claims] 1. A personal handy phone system ("PH"
S "), a new PHS is performed while the cell station is in the maximum call connection state.
When a subscriber makes a call request to a predetermined emergency special call such as police, fire, etc., even if all the communication channels of the cell station are in a busy state, the caller temporarily disconnects the currently used channel, In order to prioritize the call processing of the emergency special number call, the call channel is forcibly interrupted, the emergency special number call is connected, and the call is continued even if the emergency special number call exceeds a certain talk time. In this case, the PHS emergency outgoing call connection control method is characterized in that the call is continued by changing the interrupt channel.
Law . 2. Forcibly interrupting a call channel for securing a call connection of the emergency special number call, forcibly selecting a call channel used by a PHS subscriber having the longest talk time among the channels during the call. Interruption, Once a PHS subscriber is interrupted, the rotation at the time of the interrupt request is reduced, and if the emergency special number call continues for a certain period of time and the call continues, the call time is changed when the interrupt channel is changed. The method according to claim 1, wherein an interrupt is forcibly interrupted to a call channel used by the next longest subscriber, and after the rotation has completed one round, when the next interrupt is requested, the interrupt is rotated in the previous order. 1
PHS emergency outgoing call connection control how described. 3. The PHS emergency call as set forth in claim 1, wherein the call connection of the PHS subscriber whose call has been temporarily disconnected is restored when the interruption for the call connection of the emergency special number call is released. call connection control how. 4. A personal handy phone system ("PH").
S "), when the cell station is in the maximum call connection state, when a new emergency special call is requested, the call channel during the call is temporarily disconnected and a call channel for interrupting the emergency special call is selected. means for, said before being cut the call by interrupts emergency number call, advance the subscriber both busy, emergency outgoing call interruption means for sending a notification announcement for, PHS emergency originating call connection with the A control method in which the emergency special number call is continued for more than a predetermined time.
If the call channel is interrupted, a new call channel
Means for transferring to another call channel and, after transferring to the other communication channel, an emergency special call
Automatically call both subscribers who are disconnected due to interruption
PHS emergency call connection control method characterized by comprising: means, a to reconnect.