JPH07112294B2 - Control method in wireless telephone system - Google Patents

Description

The present invention relates to a wide area cordless telephone system, and more particularly to a control system for a wireless line control device.

[Conventional technology]

A wide area cordless telephone system is used in which a large number of radio telephones (Rtel) can each be used as one of the local telephones in a wide area (service area) of an office. In such a wide area cordless telephone system, a large number of wireless connection devices (CE) are dispersedly installed in a service area, and the wireless connection devices are shared by each wireless telephone. In order to share this, each wireless telephone and public line or private branch exchange (PB
It is necessary to interpose one radio network controller (RCU) with X). The wireless line control device constantly registers and updates the position information of which wireless phone is currently in the range (wireless zone) around which wireless connection device, and when a certain wireless phone processes a call, The wireless connection device in the wireless zone in which the telephone is currently connected is connected to a public line terminal or an extension terminal corresponding to the wireless telephone of a fixed line such as a public line or a private branch exchange.

FIG. 2 shows a block diagram of a wireless line control device in a wireless telephone system of this type. As shown in FIG. 2, the conventional radio line control unit (RCU) 1 controls the entire device and switches the call path connecting to the corresponding radio connection device (CE) 2 and the call path 4 corresponding to the fixed network 3. Switch (TDS
The main control unit (CP) 6 having W) 5 and one or more station line input / output control units (LIU) 7 for interfacing with the fixed network 3 such as a public line or a private branch exchange, and control signals It has a control signal transmitter / receiver (MODEM) 8 corresponding to a wireless connection device (CE) for transmitting / receiving, and is in the communication path 4 connected to the communication path selector switch 5 of the main control unit 6 during a call, and when transmitting / receiving a control signal. It is composed of one or a plurality of connection device input / output control units (FIU) 9 having a function of switching and connecting to a control signal path connected to the control signal transceiver 8. Also, in the figure, 11
Is a status display section (STATUS), and 13 is a reset line.

When the main control unit 6 transmits a control signal to the wireless connection device 2, the control signal is written in the FIFO memory (FIFO) 10 of the connection device input / output control unit 9 to which the corresponding wireless connection device 2 is connected, The connection device input / output control unit 9 takes out the control signal written in the FIFO memory 10 and operates the voice path / control signal path switching switch 15 to control from the communication path 4 connected to the communication path switching switch 5 of the main control unit 6. After switching and connecting to the control signal path connected to the signal transceiver 8, the control signal is sent to the wireless connection device 2, and vice versa.
The connected device input / output control unit 9 which receives the control signal from the FIFO
The main controller 6 controls the wireless connection device 2 by writing a control signal in the memory 10 and taking out the control signal written in the FIFO memory 10.

[Problems to be Solved by the Invention]

The control method in the conventional wireless telephone system described above is
If the connection device input / output control unit 9 in the wireless line control device 1 fails, the main control unit 6 cannot control the wireless connection device 2.

An object of the present invention is to provide a control method in a wireless telephone system that solves the above problems.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, a control method in a wireless telephone system of the present invention is a wireless system including a plurality of wireless connection devices installed corresponding to a plurality of zones of a service area and a wireless line control device for integrally controlling them. In the telephone system, the wireless line control device includes a call path switching switch that controls the entire device and connects to a call path corresponding to the wireless connection device, and a connection device input / output control unit corresponding to the wireless connection device that needs to be controlled. To control the wireless connection device according to the instruction of the main control unit having a control signal transceiver that transmits and receives control signals to and from the wireless connection device by connecting to the communication path of In addition, it has a control signal transmitter / receiver corresponding to the wireless connection device, and at the time of a call, it is connected to the call path connected to the call path changeover switch of the main control unit and During signal transmission and reception, and switching connected to a control signal path connected to the control signal transceiver, and has a connection device output control unit for controlling the wireless connection device.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the present invention.

In the figure, a radio network controller (RCU) 1 controls a whole device and connects a corresponding radio connection device 2 to a communication line 4 corresponding to a fixed network 3 by a communication line changeover switch (TDSW) 5
And one or more station line input / output control units for interfacing the main control unit (CP) 6 having a control signal transceiver (MODEM) 12 common to the equipment and the fixed network 3 such as a public line or a private branch exchange. (LIU) 7 and a control signal transmitter / receiver (MODEM) 8 corresponding to the wireless connection device 2 for transmitting and receiving control signals, and a call path selector switch 5 of the main control unit 6 during a call.
One or a plurality of connected device input / output control units (FI) having a function of switching connection to the communication path 4 connected to the control signal path and to the control signal path connected to the control signal transceiver 8 when transmitting / receiving the control signal.
U) 9. The connected device input / output control unit 9 is a FIFO
The status is displayed by the status display unit (STATUS) 11 to the main control unit 9 without passing through the memory (FIFO) 10. When a failure is detected, it indicates that the status display unit 11 has a failure. The main control unit 6 has a control signal transceiver (MODEM) 12 common to the devices, has a reset line 13 that can be reset for each connected device input / output control unit 9 and is connected to the speech path selector switch 5, The connection device input / output control unit 9 is the main control unit 6.
It remains connected to the call path 4 side connected to the call path changeover switch 5.

Normally, when the main control unit 6 transmits a control signal to the wireless connection device 2, the control signal is written in the FIFO memory 10 of the connection device input / output control unit 9 to which the corresponding wireless connection device 2 is connected, The connection device input / output control unit 9 takes out the control signal written in the FIFO memory 10 and operates the voice path / control signal path switching switch 15 to control from the communication path 4 connected to the communication path switching switch 5 of the main control unit 6. After switching and connecting to the control signal path connected to the signal transceiver 8, the control signal is sent to the wireless connection device 2, and vice versa.
The connected device input / output control unit 9 which receives the control signal from the FIFO
The control signal is written in the memory 10, and the main control unit 6 controls the wireless connection device 2 by taking out the control signal written in the FIFO memory 10.

When a failure occurs in the FIFO memory 10 of the connection device input / output control unit 9, the corresponding wireless connection device 2 cannot be controlled,
Since the end call processing cannot be performed during a call, the wireless call channel remains occupied. According to the present invention, the connection device input / output control unit 9 notifies the main display unit 6 that the status display unit 11 has failed in the FIFO memory 10, and the main control unit 6
Resets the corresponding connected device input / output control unit 9 via the reset line 13, and uses the control signal transmitter / receiver 12 common to the devices in the main control unit 6 through the communication path 4 without using the FIFO memory 10. Is totally received and the call ending process is performed.

〔The invention's effect〕

As described above, according to the present invention, in addition to controlling the wireless connection device using the control signal transmitter / receiver corresponding to the wireless connection device of the connection device input / output control unit of the wireless line control device, the connection device is connected from the main control unit. In addition to having the function to switch the communication path of the input / output control unit and the control signal transmission / reception function common to all devices in the main control unit, it is connected to the communication path selector switch and is compatible with wireless connection devices that need to be controlled. By connecting to the communication path of the control unit with the communication path selector switch, the wireless connection device can be controlled without going through the connection device input / output control unit.
There is an effect that the occupation of the wireless communication channel can be prevented when the FIFO memory fails.

[Brief description of drawings]

FIG. 1 is a block diagram showing a wireless line controller for performing a control method in a wireless telephone wide area system of the present invention, and FIG. 2 is a block diagram showing a conventional wireless line controller. 1 ... Radio line control unit (RCU) 2 ... Radio connection unit (CE) 3 ... Fixed network 4 ... Call path 5 ... Call path switch (TDSW) 6 ... Main control unit (CP) 7 ... … Station line input / output control unit (LIU) 8, 12 …… Control signal transceiver (MODEM) 9 …… Connected device input / output control unit (FIU) 10 …… FIFO memory (FIFO) 11 …… Status display unit (STATUS ) 13 …… Reset line 14 …… Wireless telephone (Rtel)

Claims (1)

[Claims] 1. A wireless telephone system comprising a plurality of wireless connection devices installed corresponding to a plurality of zones of a service area, and a wireless line control device for integrally controlling them, wherein the wireless line control device is the entire device. By connecting to the call path of the connection device input / output control unit corresponding to the wireless connection device that needs to be controlled, and the call path switch that controls A main control unit that has a control signal transceiver that sends and receives control signals to and from the wireless connection device, and a control signal transceiver that corresponds to the wireless connection device to control the wireless connection device according to the instructions of the main control unit. Hold and switch to the communication path connected to the communication path selector switch of the main control unit, or to the control signal path connected to the control signal transceiver when transmitting / receiving control signals. Instead connected, the control method in a radio telephone system and having a connection device output control unit for controlling the wireless connection device.