JPH09181670A - Telephone repeater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To use the telephone set of a personal handy phone system(PHS) without the base station of the PHS nearby by providing a telephone repeater provided with the telephone set of the PHS and the telephone set of a cellular telephone system. SOLUTION: A repeater 2 inside a vehicle connects the converter 3F of a PHS master unit 3 and the converter 4F of a cellular telephone set 4 by a cable and makes the communication of analog voice signals be performed. Also, the CPU 3C of the PHS master unit 3 and the CPU 4C of the cellular telephone set 4 are connected by the cable and the mutual communication of digital dial data is performed. In the case that the PHS telephone set 5 performs the communication with a general subscription telephone set, connection is performed through the PHS master unit 3 - the cellular telephone set 4 - a radio base station 6 - an automobile telephone exchange - a gateway exchange - a general telephone network. Thus, even during high-speed movement and even without the PHS base station nearby, the PHS telephone set is used.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a telephone relay device.

[0002]

2. Description of the Related Art Currently, in Japan, a simplified mobile phone system (personal handyphone system) (hereinafter,
PHS) and a cellular phone system (automobile / cell phone system) coexist.

[0003]

The PHS is characterized by a smaller telephone and a lower telephone charge than the cellular telephone system, and it is rapidly becoming popular at present, but compared with the cellular telephone system, It has the following drawbacks.

The cellular telephone system covers a wide area with a radius of 1.5 km to several km per base station (macro cell), whereas the PHS has only a small area with a radius of 100 m to several hundred m per base station. Cannot be covered (macro cell).

Further, the cellular telephone system has an independent network different from the existing telephone network, and by providing a dedicated wireless line control device for each of the independent network and the base station, a bandover even during high speed movement. Functions are available, but PHS
In order to reduce costs, a network configuration that maximizes the use of the existing telephone network has been adopted, and a large number of microcells make up the service area. Since the coverage area of the station is small, frequent handovers occur, and the radio link control function between the base stations cannot follow. Therefore, the walking speed of the mobile telephone is limited to the walking speed.

In view of such a point, the present invention is similar to the cellular phone and the car phone of the cellular phone system, and is in close proximity to the mobile phone such as in the mountains or on the sea even when moving at high speed.
An attempt is made to propose a telephone relay device that can use a PHS telephone even if there is no HS base station.

[0007]

SUMMARY OF THE INVENTION The present invention comprises a portable telephone system (PHS) telephone and a cellular telephone system telephone that communicates with the portable telephone system telephone. It is a characteristic telephone relay device.

According to the present invention, the PHS telephone is connected to the cellular telephone system telephone of the telephone relay apparatus by connecting the PHS telephone to the telephone telephone of the cellular telephone system of the telephone relay apparatus. Can be used as a telephone.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. 2 is an in-vehicle repeater,
It is composed of a PHS telephone, that is, a PHS master device 3, and a telephone of a cellular telephone system that communicates with the PHS master device 3, that is, a cellular telephone (digital or analog cellular telephone) 4.

The PHS base unit 3 is connected to a telephone circuit 3B, a CPU 3C for controlling the telephone circuit 3B, a transceiver 3D connected to the telephone circuit 3B, a transmission / reception antenna 3A connected to the transceiver 3D, and a transceiver 3D, It has a converter 3F for converting the received digital audio signal into an analog signal and the transmitted analog audio signal into a digital signal.

The cellular telephone 4 is connected to a telephone circuit 4B, a CPU 4C for controlling the telephone circuit 4B, a transceiver 4D connected to the telephone circuit 4B, a transmission / reception antenna 4A connected to the transceiver 4D, and a transceiver 4D for reception. It has a converter 4F for converting a digital audio signal into an analog signal and a transmitted analog audio signal into a digital signal. If the cellular telephone 4 is a digital telephone, the converter 4F is required, but if the cellular telephone 4 is an analog telephone, it is not necessary.

A cable is connected between the converter 3F of the PHS master unit 3 and the converter 4F of the cellular telephone 4 (transceiver 4D if the converter 4F is not provided) to perform analog voice signal communication. Let CPU3C of PHS base unit 3,
A cable is connected to the CPU 4C of the cellular telephone 4 to allow mutual transmission of digital dial data. These cables are a single multi-core cable, or
It consists of two single-core cables.

Instead of connecting a cable between the PHS master unit 3 and the cellular telephone 4, an infrared transmitter / receiver is provided in each of the PHS master unit 3 and the cellular telephone 4, and infrared rays are transmitted by analog voice signals and digital dial data. The modulated and transmitted infrared rays modulated with the received analog voice signal and digital dial data are demodulated to obtain the analog voice signal and digital dial data.

Instead of the PHS master unit 3 of the relay unit 2,
A PHS telephone as a slave similar to the PHS telephone 5 may be used. In that case, wireless communication between the PHS telephone (slave unit) and the PHS telephone 5 uses the PHS transceiver function.

Reference numeral 1 denotes a vehicle such as an automobile, a bus or a train, which is equipped with the in-vehicle repeater 2. In addition, this relay 2
In addition to being installed in an aircraft, a ship, etc., it can be installed in a place where there is no PHS base station nearby such as a mountain, sea, or island.
Further, 6 is a radio base station of the cellular telephone system, which has a transmitting / receiving antenna 6A.

Reference numeral 5 is a PH used by passengers in the vehicle 1.
The S telephone has a transmitting / receiving antenna 5A. When making a call between the PHS telephone 5 and the general subscriber telephone,
The PHS telephone 5 and the general subscriber telephone are connected via a PHS master unit 3-cellular telephone 4-radio base station 6-radio line controller-vehicle telephone exchange-gateway exchange-general telephone network. In this case, naturally, wireless communication is performed between the PHS telephone 5 and the PHS master device 3, and between the cellular telephone 4 and the wireless base station 6.

Further, when a call is made between the PHS telephones 5 and 5 in the respective vehicles equipped with the above-mentioned in-vehicle repeater 2, respectively, the PHSs in the respective vehicles 1 and 1 are carried out. Between the telephones 5 and 5, the PHS master device 3 of the relay device 2 of a certain vehicle 3-
Cellular telephone 4-Radio base station 6 of cellular telephone system-Radio base station 6 of other cellular telephone system (may be omitted) -Cellular telephone 4 of repeater 2 of another vehicle 4-PHS master unit 3 Connected through.

[0018]

According to the present invention described above, since it has a portable telephone system (PHS) telephone and a cellular telephone system telephone for communicating with the portable telephone system telephone, Similar to cellular phones and car phones of the cellular phone system, even during high-speed movement,
Further, it is possible to obtain a telephone relay device that can use a PHS telephone even if there is no PHS base station nearby such as in the mountains or on the sea.

[Brief description of the drawings]

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

[Explanation of symbols]

 1 vehicle 2 in-vehicle repeater 3 PHS master unit 4 cellular telephone 5 PHS telephone 6 wireless base station

Claims (2)

[Claims] 1. A telephone relay device comprising: a telephone of a simplified mobile telephone system; and a telephone of a cellular telephone system for communicating with the telephone of the simplified portable telephone system. 2. The telephone relay device according to claim 1, wherein the communication is performed via a cable or by using infrared rays.