JP2690719B2 - Special call service method and device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for providing a special call service in a telephone service, and more particularly to a telephone switchboard for a telephone subscriber accommodated in a remotely installed wireless terminal. It is applied in a wireless communication system that provides telephone service via a wireless base station connected to a subscriber circuit. Then, a special call service such as a three-way call service or an incoming call waiting service is provided to subscribers who are accommodated in the radio terminal station and are making a call with each other in their own station.

[0002]

2. Description of the Related Art A conventional method for realizing a special call service implemented in such a wireless communication system will be described with reference to FIGS.

8 and 9 provide telephone services to telephone subscribers accommodated in remotely installed wireless terminal stations via a wireless base station connected to a subscriber circuit of a telephone exchange. In a wireless communication system for realizing a local call between subscribers accommodated in the wireless terminal station and a special call service for adding another third subscriber to the call during the call. FIG. 3 is a block diagram of a wireless communication system for explaining FIG.

The configuration of this wireless communication system will be described with reference to FIG.

This wireless communication system is applied to an area where telephone subscribers are scattered in a distant place and it is uneconomical to construct a subscriber line from a telephone exchange to individual subscribers. Is.

Therefore, the subscriber terminals 8, 9 and 10 scattered far away are accommodated in the radio terminal station 3a installed in the area, and the subscriber circuits 22 and 23 of the telephone exchange 1 corresponding to those subscriber terminals. , 24 accommodating the radio base station 2a
And the communication channels 70 and 71 for communication by radio waves.

For the telephone exchange 1, the subscriber terminal 8,
9 and 10 are connected to the subscriber circuits 22, 23 and 24 to perform switching connection control.

On the other hand, the radio base station 2a includes a subscriber system controller 50 that interfaces with the telephone exchange 1, and a radio terminal station 3a.
The wireless system control unit 30 that interfaces with the wireless base station and the control unit of the master control unit 40a that controls the entire wireless base station.

The subscriber system control unit 50 controls the subscriber circuits 52, 53, 54 connected to the subscriber circuits 22, 23, 24 of the telephone exchange 1 by the subscriber lines 4, 5, 6 and the call control. It is composed of a device 51. Radio system controller 30
Is a radio signal transmitting / receiving device 32 for transmitting / receiving radio signals to / from the radio terminal station 3a, a digital trunk interface (hereinafter referred to as DTI) 33 for communicating with the master control unit 40a, and a control for controlling this control unit in general. Device 3
It is composed of 1. The master control unit 40a includes a storage device 41a, a DTI 42, and a control device 43a,
The wireless system control unit 30 and the subscriber system control unit 50 by the DTI 42
, And manages the wireless signals and subscriber information of this wireless communication system.

The radio terminal station 3a corresponds to the subscriber circuits 22, 23, 24 of the telephone exchange 1 and subscriber circuits 63, 64,
65 are installed and accommodate subscriber terminals 8, 9 and 10, respectively. Furthermore, the wireless signal transmitting / receiving device 61,
The storage device 62a and the control device 60a are provided.

In the wireless communication system thus constructed, the subscriber terminal 8 accommodated in the wireless terminal station 3a,
The voice signals (analog signals) of 9 and 10 and the subscriber line loop information are digitally converted by the subscriber circuits 63, 64 and 65 and transmitted to the radio system controller 30 of the radio base station 2a through the call transmission channel. It These signals and information are sent to the subscriber control unit 50 via the DTI 33 of the radio control unit 30 and the DTI 42 of the master control unit 40a of the radio base station.
Is sent to the subscriber circuit of the telephone exchange 1 and converted into an analog signal by the subscriber circuits 52, 53 and 54. Also, the analog signal output from the subscriber circuit of the telephone exchange 1 is output from the subscriber circuit of the wireless terminal 3a through the reverse route.

In this wireless communication system, when communication is performed between the subscriber terminal 8 and the subscriber terminal 9 accommodated in the radio terminal station 3a, the subscriber line loop information is first issued by calling the subscriber terminal 8. Is transmitted to the radio base station 2a via the call transmission channel 70, and the same information is output to the subscriber line 4 from the subscriber circuit 52 of the subscriber system control unit of the radio base station. It is sent to the circuit 22. The telephone exchange 1 detects this call and sends a dial tone to the subscriber circuit 22. This dial tone is transmitted to the subscriber terminal 8 of the wireless terminal 3a via the route opposite to the above. Here, the subscriber terminal 8 to the subscriber terminal 9
When the subscriber number of is input, the telephone exchange 1
And the subscriber circuit 23 is activated by the exchange operation of the telephone exchange 1.
Send a call signal to. When this call signal reaches the subscriber terminal 9 of the wireless terminal 3a via the call transmission channel 71 and the subscriber terminal 9 responds, this response signal is also transmitted via the call transmission channel 71.
Reach the telephone exchange 1.

With the above operation, the telephone exchange 1 establishes the in-house connection for connecting the subscriber circuit 22 and the subscriber circuit 23.

In the connection within the local station thus connected, the subscriber terminal 8-call transmission channel 70-radio base station 2a
-Subscriber line 4-Subscriber circuit 22-Subscriber system control device 21
-The subscriber circuit 23-subscriber line 5-radio base station 2a-transmission channel 71 for call-subscriber terminal 9 is used to make a call.

On the other hand, since both the subscriber terminal 8 and the subscriber terminal 9 are accommodated in the same wireless terminal station 3a, the inside of the wireless terminal station 3a does not go through the call transmission channels 70, 71 and the telephone exchange 1. It is also possible to adopt a configuration in which the local telephone call is performed with.

In this case, the master control unit 40a of the radio base station 2a monitors the signal in the connection process and confirms that the subscriber terminal 8 and the subscriber terminal 9 are accommodated in the same radio terminal station. Then, when the connection by the telephone exchange 1 is completed, the local station call request is made to the wireless terminal station. As a result, the wireless terminal station releases the call transmission channels 70 and 71 and connects the call paths of the subscriber terminal 8 and the subscriber terminal 9 in the control device 60a. FIG. 9 is a block diagram showing a state where a call within the local station is being performed within the wireless terminal station 3a in this manner.

Generally, various special call services are prepared for the telephone service, and the services should be provided fairly if the subscriber desires. Therefore, when the telephone exchange 1 has a function of providing such a special call service, even the subscriber accommodated in this telephone exchange by the above-mentioned wireless communication system is directly accommodated in the telephone exchange 1. It must be able to provide special calling services as well as the subscribers being subscribed to.

Therefore, when the subscriber terminals accommodated in the same radio terminal station are making a local call, a conventional special call service for adding another third subscriber to the call is provided. The method will be described below.

Such special call services include a three-party call service in which a third party is called during an existing connection within the own station and a call is made by adding the third party, and a third party call service during the existing connection within the own station. There is a call waiting service that accepts an incoming call from a caller and appropriately switches between an existing connection and a connection with a new third party.

What is common to these special call services is that some kind of intention display by a hooking signal or the like is sent from the subscriber terminal to the telephone exchange in order to shift from existing local calls to those services or to change control. Must be communicated to. For example, hooking for requesting control to call a new subscriber for three-way calling, hooking for recognizing an incoming call and accepting the call are necessary. In addition, in the call waiting service, in order to recognize the call incoming, a signal (call waiting tone) that informs the calling subscriber that there is an incoming call from a third party is provided from the telephone exchange. It also needs to be communicated to the receiving subscriber.

Therefore, in the configuration shown in FIG. 9 in which a local telephone call is carried out in the wireless terminal station, since the telephone call transmission channel has already been released, the subscriber such as hooking sends information to the telephone exchange. There is no means for transmitting or a means for transmitting a ringing tone during a call from the telephone exchange to the subscriber. That is, since the special call service cannot be provided by the configuration of FIG. 9, it is necessary to prohibit the control of the in-house call by the connection in such a configuration.

In order to provide a special call service such as a three-way call service or a call waiting service to a subscriber terminal accommodated in a wireless communication system according to the prior art, the subscriber terminal 8-for call Transmission channel 70-Radio base station 2a-Subscriber line 4-Subscriber circuit 22-Subscriber system control device 21-Subscriber circuit 23-Subscriber line 5-Radio base station 2
a-Transmission channel 71 for communication-It is necessary to have a configuration for connection within the own station through the route of the subscriber terminal 9.

In the case of the connection having such a configuration (connection shown in FIG. 8), a three-party call is made by adding the subscriber terminal 7 accommodated in the telephone exchange 1 during a call between the subscriber terminal 8 and the subscriber terminal 9. Since the transmission channel for a call is secured when performing an incoming call or receiving an incoming call from the subscriber terminal 7 to the active subscriber terminal 8 and the subscriber terminal 9, In that case, if the incoming tone during a call is transmitted from the telephone exchange 1 through the call transmission channel 71, or if the subscriber terminal 8 hooks in common to both services, the information is transmitted to the call transmission channel 70. It is transmitted to the radio base station 2 and further to the telephone exchange 1 via the, and the telephone exchange 1 controls the three-way call and the incoming call during the call corresponding to the hooking signal.

[0024]

In the wireless communication system as described above, even if the telephone exchange has a function of providing a special call service such as a three-way call service or a call waiting service, the subscriber is subscribed. If the connection form of the person is a call within the own station between the subscribers of the wireless terminal station, it is necessary to send and receive a control signal related to the service between the subscriber and the telephone exchange. There was a problem that we had to add restrictions.

[0025] First, even in a local station call within the wireless terminal station, it is not possible for the subscribers to which the special call service is applied to release the call transmission channel and connect within the wireless terminal station. There is.

Further, for such a subscriber, since a communication transmission channel is uniformly secured and a connection form is established via a radio base station and a telephone exchange, that subscriber does not use the service. Even in such a case, there is a problem that the call transmission channel is wasted because the call cannot be transferred to the local station call within the wireless terminal station.

[0027]

A special call service method and apparatus thereof according to the present invention include a wireless terminal station accommodating a first subscriber terminal group and a second terminal station group and accommodating a first subscriber terminal group. A telephone exchange having a special call service function of which execution is requested from a subscriber terminal group or a special call service function of notifying execution to the first subscriber terminal group, and this wireless terminal station and wireless line And a radio base station connected to the telephone exchange and a subscriber line, wherein any two subscriber terminals in the first subscriber terminal group are connected in the radio terminal station. A wireless communication system in which a pseudo subscriber loop signal is supplied from the above-mentioned wireless base station to a subscriber circuit in a telephone exchange corresponding to any two subscriber terminals and held in an in-house call to be connected. Applied in That.

The first service method relates to a special call service function that the first subscriber terminal group is required to start executing, and comprises the following procedure.

(1) When an arbitrary subscriber terminal in a local station call in the first subscriber terminal group requests execution start of a special call service, the wireless terminal station makes a special call to the wireless base station. A signal requesting control related to a service is transmitted. (2) Based on the received control request signal relating to the special call service, the wireless base station makes a call between two arbitrary subscriber terminals in the first subscriber terminal group in the local station via the telephone exchange. Two call transmission channels for communication are secured, and the call transmission channel is notified to the wireless terminal station. (3) The wireless terminal station sends the subscriber loop signals of the two subscriber terminals that are in a call within the wireless terminal station to the wireless base station using the notified transmission channel for communication, and is connected within the wireless terminal station. Release the connection channel within your own station. (4) When the radio base station receives the subscriber loop signals of the two subscriber terminals during a call in the local station from the radio terminal station, the radio base station holds the subscriber circuits in the telephone exchange corresponding to the two subscriber terminals. The pseudo subscriber loop signal that was being used is released, and instead the subscriber circuit of the telephone exchange is maintained based on the subscriber loop signals of the two subscriber terminals that are in the local station call and received from the wireless terminal station. , Requests the telephone exchange to start executing the special call service.

The second service method relates to the special call service function of notifying the first subscriber terminal group of its execution from the telephone exchange, and is constituted by the following procedure.

(1) The radio base station starts execution of the special call service from the telephone exchange to any subscriber terminal in the first subscriber terminal group in the local terminal which is connected within the radio terminal station. Will be notified. (2) The radio base station secures two call transmission channels for any two subscriber terminals in the first subscriber terminal group in the local station to talk through the telephone exchange. ,
The wireless terminal station is notified of the call transmission channel. (3) The wireless terminal station sends the subscriber loop signals of the two subscriber terminals that are in a call within the wireless terminal station to the wireless base station using the notified transmission channel for communication, and is connected within the wireless terminal station. Release the connection channel within your own station. (4) When the radio base station receives the subscriber loop signals of the two subscriber terminals during a call in the local station from the radio terminal station, the radio base station holds the subscriber circuits in the telephone exchange corresponding to the two subscriber terminals. Release the pseudo subscriber loop signal, and instead hold the subscriber circuit of the telephone exchange based on the subscriber loop signals of the two subscriber terminals that are in the local station call and received from the wireless terminal station. This notifies the first subscriber terminal group of the start of execution of the special call service.

The first service device is related to the special call service function of which the execution start is requested from the first subscriber terminal group, and comprises the following means.

(1) The wireless terminal station detects a request for starting execution of a special call service from any subscriber terminal in the first subscriber terminal group during a local call, and based on this request, A means for transmitting a signal for requesting control related to a special call service to the radio base station, and a call transmission channel notified by the radio base station.
A subscriber loop signal of one subscriber terminal is sent to the radio base station, and a means for releasing the intra-station connection speech path connected within the radio terminal station is provided. (2) In the radio base station, based on the control request signal relating to the special call service received from the radio terminal station, any two subscriber terminals in the first subscriber terminal group in the local telephone call are telephone exchanges. A means for reserving two call transmission channels for making a call via the telephone and notifying the radio terminal of the call transmission channels, and a subscriber circuit in the telephone exchange corresponding to the two subscriber terminals. The subscriber circuit of the telephone exchange is retained based on the subscriber loop signals of the two subscriber terminals that are in the local station call and received from the wireless terminal station instead. Means to do
And a means for requesting the telephone exchange to start the execution of the special call service.

The second service device is related to the special call service function of notifying the first subscriber terminal group of its execution from the telephone exchange, and is constituted by the following procedure.

(1) The radio base station is a special call service which is notified from the telephone exchange to any subscriber terminal in the first subscriber terminal group in the local station which is connected within the radio terminal station. Means for detecting the start of execution of the call and securing two call transmission channels for any two subscriber terminals in the first subscriber terminal group in the local station to talk through the telephone exchange. Means for notifying the wireless terminal station of the call transmission channel, means for receiving the subscriber loop signals of the two subscriber terminals in the local station call, which are transmitted from the wireless terminal station, and two subscriber terminals. The pseudo subscriber loop signal held by the subscriber circuit in the telephone exchange corresponding to the above is released, and the subscriber loops of the two subscriber terminals in the local station call which are received from the radio terminal station instead are received. Subscriber turn of telephone exchange based on signal And means for holding. (2) The wireless terminal station sends the subscriber loop signals of the two subscriber terminals that are in the local station call to the wireless base station using the call transmission channel notified from the wireless base station, and It is equipped with a means for releasing the connected communication path within the own station.

[0036]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the present invention will be described with reference to FIGS.

FIG. 1 is a block diagram showing a radio communication system which is an embodiment of a special call service method and apparatus of the present invention. Two subscribers accommodated in a radio terminal station and a telephone exchange are accommodated in the radio communication system. It is a figure explaining the three-way call service with one existing subscriber.

FIG. 2 is a flow chart showing a processing flow of the control device of the wireless terminal station for carrying out the three-way calling service, and FIG. 3 is a master of the wireless base station for carrying out the three-way calling service. It is a flow chart which shows a flow of processing of a control device of a control part.

FIG. 4 is a block diagram showing a wireless communication system which is an embodiment of the special call service method and apparatus of the present invention. The three-party call service carried out by three subscribers accommodated in a wireless terminal station. It is a figure explaining.

FIG. 5 is a block diagram showing a wireless communication system which is an embodiment of the special call service method and apparatus of the present invention. Two telephone subscribers accommodated in a wireless terminal station make a call during a local call. It is a figure explaining the call waiting service which one subscriber accommodated in the exchange makes a call incoming call.

FIG. 6 is a flow chart showing the flow of processing of the control device of the master control unit of the radio base station for carrying out this call waiting service, and FIG. 7 is the same radio for carrying out the call waiting service. It is a flowchart which shows the flow of a process of a terminal station.

First, the three-way calling service will be described.

In FIG. 1, the subscriber terminal 8 of the radio terminal station 3
And the subscriber terminal 9 do not use the call transmission channel,
It is assumed that a call within the local station is being made by connection within the wireless terminal station. In addition, for a subscriber terminal that can register the three-way calling service and receive the service, the subscriber data from the operator console 44 connected to the wireless base station 2 in advance is used as the master control unit. 40 is input to the storage device 41. This subscriber data is further transmitted from the radio base station 2 to the radio terminal station 3 accommodating the subscriber terminal via the radio carrier, and is also input to the storage device 62 thereof.

Even in the case of a local call between subscriber terminals by connection in the wireless terminal station, the telephone exchange 1
The call paths connecting the subscriber circuits corresponding to those subscriber terminals are connected, and the subscriber line loop information for the telephone exchange 1 is simulated by the control device 51 of the subscriber system control unit 50 of the radio base station 2. Retained

In this state, when hooking for requesting the three-party call service from the subscriber terminal 8 is performed, the wireless terminal station 3 and the wireless base station 2 are respectively subjected to hooking shown in FIG. 2 (S11 to S11).
20), and the processing shown in FIG. 3 (processing of S21 to S30).

When the hooking of the subscriber terminal 8 is detected, the radio terminal station 3 refers to the subscriber data stored in the storage device 62, and the subscriber terminal is a subscriber terminal which is permitted the three-party call service. It is determined whether or not there is (S11, S
12).

When recognizing the hooking from the service-permitted subscriber terminal (S12: Y), the wireless terminal 3
Uses a control transmission channel (not shown) to transmit a local call cancellation request signal to the wireless base station 2 (S
13).

In the wireless base station 2, which has received the signal for requesting cancellation of the call within the local station from the wireless terminal station 3, the master control unit 4
The control device 43 of 0 refers to the subscriber data stored in the storage device 41 to confirm whether or not the requesting subscriber terminal is permitted to use the three-party call service (S21, S).
22).

When it is confirmed that the request is from the service-permitted subscriber terminal (S22: Y), it is then determined whether or not two call transmission channels can be secured for the subscriber terminal 8 and the subscriber terminal 9. Is confirmed (S23).

In the checking operation of S22 and S23, when either of them does not apply (S22: N or S2
3: N) reports to the wireless terminal station 3 that the call within the local station cannot be canceled. Upon receiving this report, the wireless terminal station sends a three-party call unacceptable tone to the subscriber terminal 8 and maintains the state of the local station call.

On the other hand, in the above confirmation operation, if all the conditions for canceling the call within the local station are satisfied, it is reported that the call within the local station can be canceled in response to the call cancellation request within the local station from the wireless terminal station 3. At the same time, the call transmission channels 72 and 73 assigned to the subscriber terminals 8 and 9 are notified (S24). The control device 60 of the wireless terminal station 3 receives the report, and then notifies the call transmission channel 7
2, 73, the subscriber line loop information of the subscriber terminal 8 and the subscriber terminal 9 is sent to the radio base station 2 (S17), and at the same time, the call connection in the own station that was connected in the radio terminal station is released. (S19).

When the control device 43 of the master control unit 40 of the radio base station 2 receives the subscriber line loop information of the subscriber terminal 8 and the subscriber terminal 9 (S26), the subscriber device receives the received subscriber line loop information. It is transmitted to the telephone exchange 1 via the line 4 and the subscriber line 5 (S27), and the pseudo holding of the subscriber line loop information, which has been performed by the control device 51 of the subscriber system control unit 50 until now, is stopped (S28). ). When the connection between the subscriber terminal 8 and the subscriber line 4 and between the subscriber terminal 9 and the subscriber line 5 is completed through the call transmission channels 72 and 73 by the above operation, the control device 43 of the master control unit 40 joins. The subscriber line 4 is controlled by the control device 51 of the individual system control unit 50, and the hooking pulse of the subscriber line 6 is transmitted to the telephone exchange 1 (S2).
9) Give instructions. With this hooking pulse, the telephone exchange 1 recognizes the request for the three-party call service and sends a dial tone for the second call connection to the subscriber circuit 22. The dial tone from the telephone exchange 1 is relayed to the subscriber terminal 8 so that the subscriber terminal 8 can dial for connection to the subscriber terminal 7 which is a third party. The telephone exchange 1 transmits a linking signal to the subscriber terminal 7 by the three-party call connection function according to the dial information from the subscriber terminal 8, and the subscriber terminal 7 responds to the subscriber terminal 7, the subscriber terminal 8,
The three-way communication path of the subscriber terminal 9 is connected (S20).

Next, the operation when the third party is a subscriber terminal accommodated in the same wireless terminal station will be described with reference to FIG.

In this case, when the telephone exchange 1 recognizes that a third party is a subscriber terminal corresponding to the subscriber circuit 24, it sends a calling signal to the subscriber circuit 24.
Then, this call signal is transmitted from the wireless base station 2 to the wireless terminal station 3 via the call transmission channel 74, and is transmitted from the subscriber circuit 65 in the wireless terminal station 3. In response to the response from the subscriber terminal 10, a response signal is sent to the telephone exchange 1 through the call transmission channel, and the three-party call connection function of the telephone exchange 1 causes the subscriber terminal 8, the subscriber terminal 9, and the subscriber terminal 10 to perform the response. Be able to make a three-way call.

Next, the call receiving service will be described.

In FIG. 5, the subscriber terminal 8 of the radio terminal station 3
And the subscriber terminal 9 do not use the call transmission channel,
It is assumed that a call within the local station is being made by connection within the wireless terminal station. In addition, for a subscriber terminal capable of registering a call waiting service and receiving the service, the subscriber data is preliminarily obtained from the operation console 44 connected to the radio base station 2. 40 is input to the storage device 41.

Even in the case of in-house call between subscriber terminals by connection in the wireless terminal station, the telephone exchange 1
The call paths connecting the subscriber circuits corresponding to those subscriber terminals are connected, and the subscriber line loop information for the telephone exchange 1 is simulated by the control device 51 of the subscriber system control unit 50 of the radio base station 2. Retained In the embodiment in this case, each subscriber circuit 52, 53, 5 forming the subscriber control unit 50 of the wireless base station 2 is also included.
Reference numeral 4 includes tone receivers 80, 81 and 82 for detecting signal tones transmitted from the telephone exchange 1.

In such a state, when an incoming call from the subscriber terminal 7 accommodated in the telephone exchange 1 to the busy subscriber terminal 8 accommodated in the wireless terminal 3 occurs, the telephone exchange 1 Recognizes that the subscriber terminal 8 is a subscriber terminal that receives the call waiting service, and controls the call waiting connection. That is, the call receiving tone is transmitted to the subscriber circuit 22 corresponding to the subscriber terminal 8,
Informs you that you have an incoming call.

When the tone receiver 80 provided in the subscriber circuit 52 of the subscriber system control unit 50 of the radio base station 2 connected to the subscriber circuit 22 detects this incoming call tone, the radio base station 2 is detected. 6 (S11 to S108) and FIG. 7 (S11) in the wireless terminal station 3, respectively.
The processes shown in 0 to S113) are performed.

When the tone receiver 80 detects an incoming call tone during a call, it detects it by the control device 4 of the master control unit 40.
3 (S100). The control device 43 refers to the subscriber data stored in the storage device 41 and confirms whether or not the subscriber terminal 8 is a subscriber terminal that is permitted to receive an incoming call service (S101). As a result, if the call waiting service is permitted, then it is confirmed whether or not the call transmission channels can be secured for two subscriber terminals, that is, the subscriber terminal 8 and the subscriber terminal 9 (S102).

In the confirmation operations of S101 and S102, if the former case does not apply (S101: N), the in-call incoming tone is ignored and no operation is performed to maintain the state of the own station call. If the latter does not apply (S1
02: N) waits until the call transmission channel becomes available.

On the other hand, in the above confirmation operation, if all the conditions are satisfied, the wireless terminal station 3 is requested to release the local call, and at the same time, the subscriber terminal 8 and the subscriber terminal 9 are requested.
The call transmission channels 72 and 73 to be allocated to are notified (S103). Upon receiving the request (S110), the control device 60 of the wireless terminal station 3 uses the notified call transmission channels 72 and 73 to send the subscriber terminal 8 and the subscriber terminal 9 to each other.
And sends the subscriber line loop information to the wireless base station 2 (S11
1) Further, the call within the own station is released (S112).

When the control device 43 of the master control unit 40 of the radio base station 2 receives the subscriber line loop information of the subscriber terminal 8 and the subscriber terminal 9 (S105), it joins the received subscriber line loop information. It is transmitted to the telephone exchange 1 via the subscriber line 4 and the subscriber line 5 (106), and the subscriber system control unit 5 has been used until now.
The pseudo holding of the subscriber line loop information performed by the control device 51 of 0 is stopped (S107). By the above operation, the connection between the subscriber terminal 8 and the subscriber line 4 and between the subscriber terminal 9 and the subscriber line 5 is completed again via the call transmission channels 72 and 73, so that the call is transmitted from the telephone exchange 1. The incoming call tone is transmitted to the subscriber terminal 8.

Subscriber terminal 8 by recognizing the incoming call tone during a call
When hooking is carried out at, the hooking pulse is transmitted to the telephone exchange 1 via the transmission channel 72 for communication,
The telephone exchange 1 controls the operation of the incoming call connection.

[0065]

As described above, the special call service method and the apparatus according to the present invention are provided in the local station which is connected within the wireless terminal station and is not connected with the wireless base station through the transmission channel for communication. When receiving a special call service such as a three-party call service or a call waiting service, the subscriber in question has to reallocate the call transmission channel in order to perform control in conjunction with the telephone switchboard. It is possible to easily shift to the connected connection form.

Therefore, when such a special call service is not used, it is not necessary to use the call transmission channel with the radio base station, so that the call transmission channel can be effectively used, and Since the special call service can be executed even in the connection form, it is possible to provide a highly flexible service.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a wireless communication system to which an embodiment of the present invention is applied, showing a three-party call state between two subscribers on the side of a wireless terminal and one subscriber on the side of a telephone exchange.

FIG. 2 is a flowchart showing a flow of processing for implementing a three-way call service of a control device for a wireless terminal station in the present application example.

FIG. 3 is a flowchart showing a flow of processing for implementing a three-way call service of the control device of the master control unit of the wireless base station in the application example.

FIG. 4 is a diagram showing a three-party call state by three subscribers on the side of a wireless terminal station in this application example.

FIG. 5 is a block diagram showing a wireless communication system according to an embodiment of the present invention, and is a diagram showing a call waiting service state between two subscribers on the wireless terminal side and one subscriber on the telephone exchange side.

FIG. 6 is a flowchart showing a flow of processing for carrying out a call waiting service of a control device of a master control unit of a radio base station in the application example.

FIG. 7 is a flowchart showing a flow of processing for carrying out an incoming call service during a call of a control device of a wireless terminal station in the present application example.

FIG. 8 is a block diagram showing a wireless communication system to which a conventional example is applied, and is a diagram showing a call state of two subscribers on the side of a wireless terminal via a telephone exchange.

9 is a diagram showing a call state by two subscribers on the side of a wireless terminal in the wireless communication system to which the conventional example shown in FIG. 8 is applied.

[Explanation of symbols]

1 Telephone Switch 2 Radio Base Station 3 Radio Terminal Station 4, 5, 6 Subscriber Line 7, 8, 9, 10 Subscriber Terminal 20 Master Control Device 21 Subscriber System Control Device 22, 23, 24, 25 Subscriber Circuit 30 Radio system control unit 31 Control device 32 Radio signal transmitting / receiving device 33 Digital trunk interface (D
TI) 40 master control unit 41 storage device 42 digital trunk interface (D
TI) 43 control device 44 operation console 50 subscriber system control unit 51 control device 52, 53, 54 subscriber circuit 60 control device 61 radio signal transmission / reception device 62 storage device 63, 64, 65 subscriber circuit 70, 71, 72, 73,74 Call transmission channel 80,81,82 Tone receiver

Claims (4)

(57) [Claims] 1. A special call service that accommodates a wireless terminal station that accommodates a first subscriber terminal group and a second subscriber terminal group, and that is requested to start its execution by the first subscriber terminal group. A telephone switchboard having a function; and a wireless base station connected to the wireless terminal station by a wireless line and connected to the telephone switchboard by a subscriber line. Any one of the first subscriber terminal group is included. In a local call for connecting two subscriber terminals in the radio terminal station, a pseudo subscriber from the radio base station to a subscriber circuit in the telephone exchange corresponding to the arbitrary two subscriber terminals. In a wireless communication system for supplying and holding a party loop signal, when any subscriber terminal in the local station in the first subscriber terminal group requests execution start of the special call service, the wireless terminal station For the wireless base station Sends a signal requesting the control relating to Koto call service, the radio base station, based on the control request signal related to the received the special call service, the first in the local station call
Two subscriber terminals of the subscriber terminal group of 2) secure two call transmission channels for making a call through the telephone exchange and notify the radio terminal station of the call transmission channels. The wireless terminal station sends the subscriber loop signals of the two subscriber terminals in the local station call using the notified call transmission channel to the wireless base station and is connected within the wireless terminal station. When the subscriber base station receives the subscriber loop signals of the two subscriber terminals in the local station call from the radio terminal station, the radio base station releases the intra-station connected call path. The pseudo subscriber loop signal held by the subscriber circuit in the telephone exchange is released, and instead, the subscriber loop signals of the two subscriber terminals in the local station call received from the wireless terminal station are used. Based on the telephone exchange Special call service wherein the requesting holds the subscriber circuit, the execution start of the special call service to the telephone exchange. 2. A wireless telephone station accommodating a first subscriber terminal group, and a special call accommodating a second subscriber terminal group and notifying the first subscriber terminal group of the start of execution thereof. It comprises a telephone exchange having a service function, and a radio base station connected to the radio terminal station by a radio line and connected to the telephone exchange by a subscriber line, which is included in the first subscriber terminal group. In the in-house call for connecting the two subscriber terminals in the wireless terminal station in the local station, the wireless base station makes a pseudo for the subscriber circuit in the telephone exchange corresponding to the arbitrary two subscriber terminals. In a wireless communication system for supplying and holding a subscriber loop signal, the wireless base station is an arbitrary subscriber terminal in the first subscriber terminal group during a local call which is connected in the wireless terminal station. Against the special call from the telephone exchange Is notified of the start of execution of the service, and the radio base station is configured to perform two calls for any two subscriber terminals in the first subscriber terminal group in the local station to talk via the telephone exchange. A call transmission channel is secured, and the call transmission channel is notified to the wireless terminal station, and the wireless terminal station uses the notified call transmission channel to notify the two terminal terminals The subscriber loop signal is sent to the radio base station, and the intra-station connection call path connected within the radio terminal station is released, and the radio base station joins two subscriber terminals during the intra-station call. When a subscriber loop signal is received from the wireless terminal station, the pseudo subscriber loop signal held by the subscriber circuit in the telephone exchange corresponding to the two subscriber terminals is released, and instead, the subscriber loop signal is released. The above received from the wireless terminal Notifying the first subscriber terminal group of the start of execution of the special call service by holding the subscriber circuit of the telephone exchange based on the subscriber loop signals of the two subscriber terminals during the intra-office call. A special call service method characterized by: 3. A special call service for accommodating a wireless terminal station accommodating a first subscriber terminal group and a second terminal group, and requesting the execution start from the first subscriber terminal group. A telephone switchboard having a function; and a wireless base station connected to the wireless terminal station by a wireless line and connected to the telephone switchboard by a subscriber line. Any one of the first subscriber terminal group is included. In a local call for connecting two subscriber terminals in the radio terminal station, a pseudo subscriber from the radio base station to a subscriber circuit in the telephone exchange corresponding to the arbitrary two subscriber terminals. In the wireless communication system for supplying and holding a user loop signal, the wireless terminal station requests the special call service to start executing from any subscriber terminal in the local station call in the first subscriber terminal group. The means for detecting Then, means for transmitting a signal requesting control related to the special call service to the wireless base station, and two subscribers who are in a local call using the call transmission channel notified from the wireless base station. And a means for releasing the subscriber loop signal of the terminal to the radio base station and releasing the intra-station connection speech path connected in the radio end station, wherein the radio base station receives from the radio end station. Based on the control request signal related to the special call service described above, any two subscriber terminals in the first subscriber terminal group in the local station can make two telephone calls via the telephone exchange. A means for reserving a transmission channel and notifying the radio terminal station of the transmission channel for communication, and a pseudo circuit held for the subscriber circuit in the telephone exchange corresponding to the two subscriber terminals. Means for releasing the subscriber loop signal and, instead, holding the subscriber circuit of the telephone exchange on the basis of the subscriber loop signals of the two subscriber terminals in the local station call received from the wireless terminal station; A special call service device comprising means for requesting the telephone exchange to start execution of a call service. 4. A special call for accommodating a wireless terminal station accommodating a first subscriber terminal group and a second subscriber terminal group and notifying the first subscriber terminal group of the start of its execution. It comprises a telephone exchange having a service function, and a radio base station connected to the radio terminal station by a radio line and connected to the telephone exchange by a subscriber line, which is included in the first subscriber terminal group. In the in-house call for connecting the two subscriber terminals in the wireless terminal station in the local station, the wireless base station makes a pseudo for the subscriber circuit in the telephone exchange corresponding to the arbitrary two subscriber terminals. In a wireless communication system that supplies and holds a subscriber loop signal, the wireless base station is an arbitrary subscriber terminal in the first subscriber terminal group that is in a local station call connected in the wireless terminal station. Before being notified by the telephone exchange to Detecting the execution start of the special call service means and, local station busy the first subscriber terminal group of any two among
Means for securing two call transmission channels for one subscriber terminal to talk through the telephone exchange, and notifying the radio terminal station of the call transmission channels, and transmitting from the radio terminal station Means for receiving the subscriber loop signals of the two subscriber terminals during the local telephone call, and the pseudo subscriber held for the subscriber circuit in the telephone exchange corresponding to the two subscriber terminals. Means for releasing a loop signal and, instead, holding the subscriber circuit of the telephone exchange based on the subscriber loop signals of the two subscriber terminals in the local station call received from the radio terminal station, The wireless terminal station sends the subscriber loop signals of the two subscriber terminals in the local station call using the call transmission channel notified from the wireless base station to the wireless base station and, at the same time, within the wireless terminal station. Connection And a means for releasing the connection channel within the own station, which has been used for the special call service device.