JPH0955976A - Wireless communication system - Google Patents

Abstract

(57) Abstract: It is an object of the present invention to provide a wireless communication system capable of avoiding a completely incommunicable state when a failure occurs in a switching system. A wireless communication system having a base station accommodated in an exchange and a slave unit wirelessly connected to the base station and capable of communicating between a plurality of slave units without going through the base station. ,
A failure detection unit 8 for detecting a failure of the exchange system is provided so that when the failure of the exchange system occurs, communication can be directly performed between the slave units without going through the base station.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a handset communication function in various digital wireless telephones of a personal handyphone system (PHS).

[0002]

2. Description of the Related Art FIG. 2 is a block diagram showing a configuration of a conventional telephone exchange system accommodating a wireless telephone.

The illustrated system accommodates an ISDN line 13 from an ISDN network 14 and controls a main unit 12 for exchange control.
Wireless base stations 15 and 16 connected to the main device 12 via communication lines 17 and 18, and the wireless base station 15 and
16 and wireless telephones 19 and 20 wirelessly connected to each other.

The communication lines 17 and 18 transmit voice signals and control signals and, at the same time, supply power to the radio base stations 15 and 16.

Here, when a call is made from the wireless telephone 19, a control signal for line connection is transmitted / received via the wireless base station 15, and even after the line connection, a voice signal is transmitted via the wireless base station 15. Sent and received. Similarly, when making a call from the wireless telephone 20, the control signal and the voice signal are transmitted and received via the wireless base station 16.

[0006]

However, in the above conventional example, the control signal and the voice signal are transmitted to the radio base stations 15 and 16 respectively.
Because it is sent and received via the
When the wireless base stations 15 and 16 are in an inoperative state due to the disconnection of 8 or the like, there is a problem that the wireless telephones 19 and 20 cannot communicate although they are normal.

Further, even when the main unit 12 is in a non-operational state or a malfunctioning state, necessary control signals are transmitted to the radio base stations 15 and 16
Since it was not sent to, there was a problem that it became impossible to call.

An object of the present invention is to provide a wireless communication system capable of avoiding a completely incommunicable state at the time of failure of a switching system.

[0009]

According to the present invention, a base station accommodated in a switching apparatus and a slave unit wirelessly connected to the base station are provided, and a plurality of slave units communicate with each other without going through the base station. In a wireless communication system capable of performing the following, failure detection means for detecting a failure of the exchange system, operation mode setting means for setting the operation of the slave unit in a mode not passing through the base station, and when the failure detection means detects And a control unit that sets the operation mode of the slave unit to a mode that does not pass through the base station and that performs control for realizing communication between the slave units with other slave units.

According to the present invention, when a failure occurs in the switching apparatus or the switching system including the switching apparatus and the base station, it is possible to directly communicate between the slave units without going through the base station, and to avoid a completely incommunicable state. .

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION A personal handyphone system (PH) will now be described as an embodiment of the present invention.
S) will be described as an example.

FIG. 1 shows a PHS according to an embodiment of the present invention.
3 is a block diagram showing the configuration of the telephone set 11. FIG.

In FIG. 1, a handset 1 is for transmitting and receiving with a microphone and a speaker, and a voice processing unit 2 is for performing compression coding processing and decompression decoding processing of voice data. is there.

The channel CODEC section 3 performs TDMA processing such as frame disassembly / assembly, error correction processing, scramble processing and demodulation of voice data, and the modulation / demodulation section 4 modulates transmission data and reception data. Is to do.

The RF unit 5 is for performing various signal processing for transmission and reception, and the antenna 6 is for transmitting and receiving radio waves.

The key operating unit 7 controls various key input operations, and the fault detecting means 8 detects a fault in the exchange system.

The control unit 10 controls each unit, and has a communication control processing unit 10a, a key operation control processing unit 10b, and an operation mode setting processing unit 10c.

The communication control processing means 10a performs communication protocol processing of layers 1 to 3 of the PHS, and the key operation control processing means 10b analyzes various key input information from the key operation portion 7 to perform processing. .

The operation mode setting processing means 10c makes various settings so that the telephone operates as a base station. Specifically, the clock extracted from the base station is switched to a self-generated clock, or the position of the time slot used is changed.

FIG. 2 is a block diagram showing an example of the configuration of a PHS system including a PHS telephone for explaining the operation of this embodiment.

This system uses I from the ISDN network 14.
A main unit 12 that accommodates an SDN line 13 and performs exchange control
Wireless base stations 15 and 16 connected to the main device 12 via communication lines 17 and 18, and the wireless base station 15 and
16 and PHS telephones 19 and 20 wirelessly connected to each other.

As specified in RCR STD-28, the PHS telephones 19 and 20 are connected to the radio base stations 15 and 16 respectively.
It has a communication function between handset units that allows direct communication between handset units without going through.

Next, FIG. 3 is a flow chart showing the operation of this embodiment.

When a failure occurs in the radio base station 15 or the main unit 12 (ST1), the failure detection means 8 of the PHS telephone 19 detects it and notifies the control section 10 (ST).
2).

A specific method of detecting a failure can be realized by the presence or absence of a response signal from the radio base station 15 to a command sent from the PHS telephone 19 to the radio base station 15, for example. That is, the disconnection of the wireless base station 15 due to the disconnection of the communication line 17 or the like can be detected by this method. In addition, when a prescribed control signal is transmitted from the wireless base station 15 to the wireless base station 15 by transmitting a prescribed control signal to the wireless base station 15.
Since it is returned to the HS telephone 19, a malfunction or malfunction of the main unit 12 can be detected by this method.

Next, the operation mode setting processing means 10c sets the PHS telephone 19 so that the operation mode becomes the base station mode (ST3). After this, PHS telephone 1
Dial the number of PHS telephone 20 from 9 (ST
4), processing is performed by the key operation control processing means 10b and the communication control processing means 10a, and a control signal is sent from the antenna 6 to the PHS telephone 20 (ST5).

When the PHS telephone 20 receives this control signal and a predetermined signal is transmitted / received, the call arrives (ST
6). Then, when the PHS telephone 20 performs a response operation,
A call is established between the handset units not via the radio base stations 15 and 16 (ST7).

In the first embodiment described above, the PHS is taken as an example, but it can be similarly implemented in other wireless medium systems.

When a failure of the exchange system is detected,
Although the wireless telephone is automatically set to the base station mode, it may be set to the base station mode after key input.

[0030]

As described above, when a failure occurs in the exchange system, a call is directly made between the handset units without going through the radio base station. Even when it cannot be used, there is an effect that it is possible to talk with another child device.

[Brief description of drawings]

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

FIG. 2 is a block diagram showing a system configuration.

FIG. 3 is a flowchart showing the operation of the above embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Handset, 2 ... Voice processing part, 3 ... Channel CODEC part, 4 ... Modulation / demodulation part, 5 ... RF part, 6 ... Antenna, 7 ... Key operation part, 8 ... Fault detection means, 10 ... Control part, 10a ... Communication control processing means, 10b ... Key operation control processing means, 10c ... Operation mode setting processing means.

Claims (5)

[Claims] 1. A wireless communication system having a base station accommodated in a switching device and a slave device wirelessly connected to the base station, and capable of communicating between a plurality of slave devices without going through the base station. A failure detecting means for detecting a failure of the exchange system; and when the failure detecting means detects the failure mode, sets the operation mode of the child device to a mode not passing through the base station to realize communication between the child devices with other child devices. And a control means for performing control. 2. The operation mode setting means according to claim 1, wherein the operation mode setting means sets an operation of the slave unit to a mode not passing through the base station, and the control means is changed to a mode not passing through the base station by the operation mode setting means. A wireless communication system which, when set, realizes inter-slave communication with another slave. 3. The wireless communication system according to claim 1, wherein the failure detecting unit detects a layer 1 failure due to a cutoff of operation of a base station. 4. The communication between the base station and the slave unit according to claim 1, wherein the communication between the base station and the slave unit is performed by TDMA / TDD.
A wireless communication system characterized in that it is performed by a method. 5. A wireless communication device having a mode of communicating with another wireless communication device without passing through a base station, the detecting means detecting a failure occurrence based on a signal from the base station, and the detecting means. A wireless communication device, comprising: setting means for setting a mode not through the base station when occurrence of a failure is detected.