JPH1070767A - Phs system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to communicate similarly to PDC(personal digital cellular) mobile equipment even when PHS(personal handyphone system) mobile equipment is used in a train or a bus, etc., which is moving. SOLUTION: This PHS system is constituted by providing PHS radio base stations A and A' with a PDC transmission and reception part which sends and receive communication information based upon a PDC communication system to and from a PDC radio base station and a communication conversion part which converts communication information of a PHS communication system from PHS mobile equipment 2 or 2' into communication information based upon a PDC communication system and also converts communication information of the PDC communication system received by the PDC transmission and reception part into communication information based upon the PHS communication system.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a PHS (Personal Ha
ndyphone System) systems, especially PDC (Perso
nal Digital Cellular) PD used in the system
PH that allows calls to be made via the wireless base station for C
Regarding the S system.

[0002]

2. Description of the Related Art In recent years, PHS has been used as a mobile communication system together with a PDC system such as an automobile and a portable telephone system.
Although the system is rapidly spreading, the former adopts RCR-STD27 as a communication system, while the latter adopts RCR-STD28, so that both systems are not compatible. You cannot talk between them.

[0003] The network configuration in the PDC system is composed of an independent network separate from the existing telephone network. By providing a dedicated radio channel control device in the independent network and the base station, the PDC mobile device can be operated at a speed higher than that of walking. The handover can be performed even when the mobile phone is used in a moving car, train or the like.

[0004]

On the other hand, the PHS system has a network configuration that makes use of the existing telephone network as a maximum source for cost reduction, and a service area is configured by a large number of microcells. When the PHS mobile device is moving at a speed higher than walking speed, handover frequently occurs. For this reason, the control of the radio line between the base stations cannot be followed, and when used in a moving train or the like, there is a drawback that the call is disabled or easily interrupted.

[0005] Therefore, an object of the present invention is to provide a PHS system capable of making a call equivalent to a PDC mobile device even when the PHS mobile device is used in a moving train or a bus.

[0006]

According to the present invention, there is provided a PHS system comprising: a PDC transmitter / receiver for transmitting / receiving call information to / from a PDC radio base station in accordance with a PDC communication system;
The call information according to the PHS communication method from the HS mobile device is converted into the call information according to the PDC communication method, and the call information according to the PDC communication method received by the PDC transmitting / receiving unit is converted into the PHS communication information. And a communication conversion unit for converting the communication information into call information in accordance with the communication system for PHS.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram of a PHS system as one embodiment, FIG. 2 is a block diagram showing a schematic configuration of a communication system conversion device, and FIG. 3 is a diagram showing a configuration between PHS mobile devices via a PDC radio base station used in a PDC system. It is a sequence diagram at the time of making a call.

The PHS system shown in FIG. 1 is capable of transmitting and receiving call information in accordance with the PHS communication method between the PHS mobile units 2 and 2 ', and also has an existing PDC radio base station used in the PDC system. PHS / PDC combined radio base stations A and A 'which can transmit and receive call information according to the PDC communication system with the station 1 are provided. The PHS mobile device 2
And 2 ', and the PHS radio base stations A and A' have the same configuration.

[0009] PHS / PDC combined radio base stations A, A '
Is a conventional PHS radio base station B that transmits and receives call information according to the PHS communication system of the RCR-STD 28 to and from the PHS mobile device 2 and the like, and a communication system conversion device C is added.

[0010] The communication system converter C receives the PDC transmission / reception unit 3 for transmitting and receiving call information in accordance with the PDC communication system with the PDC wireless base station 1 and the PHS wireless base station B. The communication information according to the PHS communication method from the PHS mobile device 2 or the like is converted into the communication information according to the PDC communication method.
The communication conversion unit 4 converts call information according to the C communication method into call information according to the PHS communication method. The conversion target in the communication conversion unit 4 is, for example, a voice codec method, a voice transmission speed, and the like.

In the above PHS system, two PHs
An outgoing / incoming operation between the S mobile units 2 and 2 'will be described with reference to FIG.

[0012] Of the two PHS mobile units 2 and 2 ', a call signal in accordance with the communication system of RCR-STD28 is transmitted from a PHS mobile unit 2 carried by a user who is riding on a bus or the like. Transmit to shared radio base station A (SQ
1).

The call signal is converted from communication information according to the PHS communication method to communication information according to the RCR-STD27 communication method in the communication conversion unit 4 of the PHS / PDC combined radio base station A. Later, PDC wireless base station 1
(SQ2).

The PDC radio base station 1 transmits a call signal received in accordance with the PDC communication method to another PHS / PDC dual-purpose radio base station A 'to call using the same communication method. (SQ3).

In the PHS / PDC combined radio base station A ',
The call signal received according to the PDC communication method is converted into communication information according to the PHS communication method by the communication conversion unit 4 incorporated therein, and the communication information is transmitted to the call destination PHS mobile device 2 '. (SQ4).

In response to the received call signal, the PHS mobile station 2 'converts the incoming call signal according to the PHS communication system into a PHS / P
The signal is transmitted to the DC base station A '(SQ5). The incoming call signal is converted from communication information according to the PHS communication method into communication information according to the PDC communication method in the communication conversion unit 4 of the PHS / PDC combined radio base station A ′.
It is transmitted to PDC wireless base station 1 (SQ6).

The PDC wireless base station 1 transmits an incoming call signal received in accordance with the PDC communication method to the PHS / PDC combined wireless base station A by the same communication method (SQ7).

In the PHS / PDC combined radio base station A, P
The incoming call signal received in accordance with the DC communication method is converted into communication information in accordance with the PHS communication method in the communication conversion unit 4 incorporated therein, and transmitted to the calling PHS mobile device 2. (SQ8). Thereby, the mobile device 2,
A communication line is established between 2 '.

The present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the invention.

[0020]

According to the first or second aspect of the present invention, P
Since call information can be transmitted and received between the HS wireless base stations using the PDC system, the call is not disabled or interrupted even when the PHS mobile device is moved at a moving speed higher than walking.

The transmitting / receiving section for PDC and the communication converting section are
Since it is provided in the S radio base station, the existing PHS radio base station can be used.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a PHS system as one embodiment of the present invention.

FIG. 2 is a block diagram illustrating a schematic configuration of a communication system conversion device.

FIG. 3 is a sequence diagram when a call is made between PHS mobile devices via a PDC wireless base station used in the PDC system.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 PDC radio base station 2, 2 'PHS mobile station 3 PDC transmission / reception part 4 Communication conversion part A, A' PHS / PDC combined radio base station

Claims (2)

[Claims] 1. A PHS for transmitting and receiving call information according to a PHS communication method between a PHS mobile device and a PHS wireless base station.
In the HS system, between the wireless base station for PDC and
PD that transmits and receives call information according to the PDC communication method
C transmission / reception unit, and converts the call information according to the PHS communication method from the PHS mobile device into the call information according to the PDC communication method.
A communication converter for converting call information according to the communication system for communication into call information according to the communication system for PHS is provided in the PHS radio base station. 2. The communication method for PDC is RCR-STD27.
The PHS system according to claim 1, wherein the PHS communication method is RCR-STD28.