JP2972686B2 - High speed mobile communication system and communication method therefor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-speed mobile communication system and a communication method therefor, and more particularly to a communication network covering a service area divided into a plurality of extremely small radio areas, and the service as a subscriber accommodated in the communication network. The present invention relates to a mobile communication system such as a PHS having a wireless terminal that communicates with another subscriber while moving in an area at high speed, and a communication method thereof.

[0002]

2. Description of the Related Art Conventionally, a radio zone (area) of each base station.
When using a simple portable telephone system (PHS) compatible with a very small zone (micro cell), if a subscriber moves at a high speed by car, train or the like, it is impossible to talk. To make an emergency call, stop or call from your destination.

[0003]

SUMMARY OF THE INVENTION As described above, PHS
However, when moving at high speed, the base station cannot be switched, so that a call cannot be made while moving at high speed. Trains that can travel for a long time at high speed, such as PHS calls on Shinkansen trains,
Message cannot be transmitted. On the other hand, as a technology for enabling use of a mobile terminal of a mobile radio communication system in a high-speed moving body, a relay device that communicates with the mobile terminal is provided in the high-speed moving body, and a plurality of relay devices scattered along a moving route by the relay device are provided. A technique for performing position notification and line connection control for a base station has been proposed (see JP-A-6-244780). However, if this technique is applied to the PHS as it is, the relay device moves at a high speed with respect to the base station, and communication cannot be continued. In order to avoid this, the radio transmission power of the relay device and each base station must be increased, or a large-scale relay station must be installed.
The simplicity as S will be lost.

SUMMARY OF THE INVENTION An object of the present invention is to make use of the characteristics of a mobile communication system compatible with micro cells such as a PHS, in which equipment costs are low, and to provide a registrant of wireless terminal use in a high-speed mobile body even during high-speed movement. An object of the present invention is to provide a high-speed mobile communication system capable of transmitting a message by recording / reproducing the message and a communication method thereof.

[0005]

SUMMARY OF THE INVENTION A high-speed mobile communication system according to the present invention includes: a communication network covering a service area divided into a plurality of extremely small radio areas; and a subscriber accommodated in the communication network within the service area. A mobile communication system such as a PHS having a wireless terminal that communicates with another subscriber while moving through the mobile terminal;
A high-speed moving body that moves at a high speed such that the passage time for each of the minimum wireless areas is shorter than the communication time required for the wireless terminal; and temporarily stores a message to the wireless terminal from a calling subscriber via the communication network. Message storing means, and a relay transmitting means for wirelessly transferring a message stored in the message storing means when detecting that the high-speed mobile body equipped with the corresponding wireless terminal has entered its wireless area. And a relay station; wherein the high-speed mobile unit receives a transfer message from the relay station to the corresponding wireless terminal by radio, and a voice storage / reproduction unit for recording and reproducing the received message; Transmitting means for calling a corresponding wireless terminal and transmitting a reproduced message from the voice storing / reproducing means.

[0006] In the above configuration, a moving route and a moving time zone of the high-speed moving body are determined in advance, and a registration of use by the user of the wireless terminal when making a reservation for boarding the high-speed moving body is received. A configuration in which a relay station that receives a message from the originating subscriber to the wireless terminal is selected according to a moving route and a moving time zone of a high-speed mobile unit, or a registration of use of the wireless terminal is received in advance in the relay station. And a registration determining means for determining whether the wireless terminal requested to transfer the message from the calling subscriber is valid.

A communication method for a high-speed mobile communication system according to the present invention includes: a communication network covering a service area divided into a plurality of extremely small radio areas, and moving within the service area as a subscriber accommodated in the communication network. A communication method of a mobile communication system such as a PHS having a wireless terminal communicating with another subscriber while moving between a high-speed moving object equipped with the wireless terminal and moving at a high speed, and the high-speed moving object And a relay station capable of wireless communication with the mobile station; a message from the calling subscriber to the wireless terminal is temporarily stored in the relay station so that the high-speed mobile unit can pass through the wireless area of the relay station. The message stored in the relay station is transferred to the high-speed mobile unit, the transferred message is temporarily stored in the high-speed mobile unit, and a corresponding radio terminal mounted is called. A step of transmitting the message.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First, the outline of the present invention will be described.

[0009] A plurality of small relay stations with a small number of accommodations are installed in the PHS network, and a PHS subscriber registers PHS use at the relay station when making a reservation for boarding a high-speed moving object such as a train.
The registration determining unit determines whether the subscriber (wireless terminal) that has made the connection request is valid. If available, a message addressed to the subscriber can be stored in the message storage. When the high-speed mobile unit enters the wireless area of the relay station, the high-speed mobile unit transmits the stored message from the message transfer unit to the high-speed mobile unit.

In the high-speed moving body, the message transmitted by the relay unit is received and stored in the voice storage / reproducing unit. The PHS subscriber can contact the moving PHS subscriber at high speed by playing the message stored by the PHS terminal.

Next, an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the present invention. In FIG. 1, a high-speed mobile communication system according to the present embodiment includes a relay station 2 connected to a PHS network 1 and a PHS network.
A high-speed mobile unit 3 on which a terminal 4 is mounted. PH
Since the S network 1 can be realized by a known technique, a description thereof will be omitted.

The relay stations 2 are small-scale relay stations with a small number of lines connected to the PHS network 1, and are scattered at a plurality of stations along the scheduled route of the high-speed mobile unit 3. The registration determination unit 21 in the relay station 2 determines whether or not PHS use registration is performed at the time of reservation for boarding, and controls so that only the registrant can talk. The storage unit 22 stores a message from the sender. When the high-speed mobile unit 3 comes to the wireless communication area of the relay station 2, the message transfer unit 23
2 is wirelessly transferred.

The high-speed moving body 3 is a vehicle such as a train moving at a high speed, a train, an automobile, etc., and is a train here. The relay device section 31 of the high-speed mobile unit 3 wirelessly transmits and receives messages to and from the relay station 2. Voice storage / playback unit 33
Performs recording / playback of a message from the relay station 2. The in-vehicle transmission unit 32 reproduces a message from the voice storage / reproduction unit 33 to the PHS terminal 4 in the high-speed mobile unit 3.

Next, the operation of this embodiment will be described in detail with reference to the flowchart of FIG.

The PH for riding the high-speed moving body 3 in advance
The user of the S terminal 4 registers the use with the PHS operator at the time of boarding reservation together with the telephone number of the corresponding PHS terminal 4 (subscriber). The PHS operator determines the relay station 2 which may be used based on the moving range and the moving time zone of the high-speed mobile unit 3 reserved for boarding (identified by the identification number or the like), and Applicable PHS on the high-speed mobile unit 3
The registration of the use permission of the terminal 4 is performed. Information on the PHS terminal 4 (telephone number, travel range, travel time zone, etc.) at the time of use registration with the PHS operator can be obtained from the boarding reservation system and the operation management system (not shown) of the high-speed mobile operator. By automatically transferring the information to a management system (not shown) of the user.

The caller from the outside determines the PH within the high-speed mobile unit 3.
To call the S terminal 4, access the PHS network 1 and enter the telephone number of the PHS terminal 4 (step A).
1). The registration determination unit 2 determines whether the line data including the corresponding telephone number received by the relay station 2 is registered for use of the PHS at the time of reservation for boarding (step A2). And stores the message (and the telephone number of the PHS terminal 4) from the outside caller 22
Is stored (step A3).

When the high-speed mobile unit 3 on which the PHS terminal 4 (and the user thereof) to be connected for communication is on (reserved for boarding) comes within the wireless area of the relay station 2 (step A4), the message transfer unit The message (and the telephone number of the PHS terminal 4) stored in the storage unit 22 is transferred through 23. Note that the message transfer speed between the relay station 2 and the high-speed mobile unit 3 can be set to be higher than the speed of the PHS terminal 4 on the wireless line. Even in a short time, the message can be transferred reliably (step A5).

Whether or not the high-speed mobile unit 3 has approached can be known by transmitting and receiving a radio signal of a predetermined format between the relay station 2 and the high-speed mobile unit 3. For example, an inquiry radio signal is transmitted from the message transfer unit 23 of the relay station 2 at a predetermined period, and the relay device unit 31 of the high-speed mobile unit 3 that has received the inquiry radio signal transmits a response including the identification number of the own mobile unit. A radio signal may be returned. On the relay station 2 side, it can be determined from the identification number in the response signal whether or not the mobile station has been reserved for boarding.

The message transferred from the relay station 2 to the high-speed mobile unit 3 is temporarily stored in the voice storage / reproduction unit 33 through the relay unit 31 and the in-vehicle transmission unit 32 (step A).
6). When the message is completely stored in the voice storage / reproduction unit 33, the in-vehicle transmission unit 32 calls the corresponding PHS terminal 4 in the vehicle according to the telephone number transferred at the same time.

When the called PHS terminal 4 responds,
By playing the message from the voice storage / playback unit 33 through the in-vehicle transmission unit 32, the user of the PHS terminal 4 can hear the message from the outside caller (step A7).

Next, another embodiment of the present invention will be described with reference to FIG.

In FIG. 3, a high-speed mobile communication system according to the second embodiment has a relay station 2 connected to a PHS network 1.
0 and the high-speed mobile unit 3 on which the PHS terminal 4 is mounted. The relay stations 20 are small-scale relay stations connected to the PHS network 1 and having a small number of lines accommodated therein, and are scattered at a plurality of stations along the planned route of the high-speed mobile unit 3. High speed moving object 3
Is the same as the high-speed mobile unit 3 shown in FIG.

The relay station 20 shown in FIG. 3 is different from the relay station 2 shown in FIG. Thus, there is no need for prior use registration, and any PHS terminal 4 can be used on the high-speed mobile unit 3. That is, anyone who owns the PHS terminal can use it.

[0025]

According to the present invention, a relay station connected to a PHS network stores a message from a caller, detects the approach of a high-speed mobile unit, transfers the message, and also receives the message on the high-speed mobile side. Since the PHS terminal is called after the stored message is stored and the stored message is reproduced, the message can be transmitted to the PHS subscriber (user) even while moving at high speed.

Further, since the relay station may be a small one having a small number of accommodated lines, the equipment cost does not increase.

[Brief description of the drawings]

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

FIG. 2 is a flowchart showing the operation of the embodiment shown in FIG.

FIG. 3 is a block diagram showing another embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 PHS network 2 relay station 3 high-speed mobile unit 4 PHS terminal 21 registration determination unit 22 storage unit 23 message transfer unit 31 relay device unit 32 in-vehicle transmission unit 33 voice storage / reproduction unit

Claims (4)

(57) [Claims] 1. A communication network that covers a service area divided into a plurality of extremely small radio areas, and communicates with another subscriber while moving within the service area as a subscriber accommodated in the communication network. PHS with wireless terminal to perform
In a mobile communication system such as the above, a high-speed moving body equipped with the wireless terminal and moving at a high speed such that the transit time for each of the minimum wireless areas is shorter than the required communication time of the wireless terminal, and via the communication network A message storage unit for temporarily storing a message from the calling subscriber to the wireless terminal, and storing the message in the message storage unit when detecting that the high-speed mobile unit equipped with the wireless terminal is approaching its own wireless area. A relay station having relay transmission means for wirelessly transferring the received message, and wherein the high-speed mobile unit receives a wireless transfer message from the relay station to a corresponding wireless terminal. Voice storage / playback means for recording and playing back the message, and calling the corresponding wireless terminal. Fast mobile communication system; and a transmitting means for transmitting the reproduced message. 2. A moving route and a moving time zone of the high-speed moving object are determined in advance, and use registration of a user of the wireless terminal at the time of reservation for boarding the high-speed moving object is received. 2. The high-speed mobile communication system according to claim 1, wherein a relay station that receives a message from the calling subscriber to the wireless terminal is selected according to a moving route and a moving time zone. 3. The relay station further includes a registration determining unit that receives registration of use of the wireless terminal in advance and determines whether the wireless terminal requested to transfer the message from the calling subscriber is valid. 3. The high-speed mobile communication system according to claim 1, wherein: 4. A communication network that covers a service area divided into a plurality of minimum wireless areas, and communicates with another subscriber while moving within the service area as a subscriber accommodated in the communication network. PHS with wireless terminal to perform
In a communication method of a mobile communication system, a high-speed moving body equipped with the wireless terminal and moving at a high speed, and a relay station capable of wirelessly communicating with the high-speed moving body are provided. A message for the wireless terminal is temporarily stored in the relay station, and the message stored in the relay station is transferred to the high-speed mobile while the high-speed mobile is passing through the wireless area of the relay station. A communication method for a high-speed mobile communication system, wherein the transferred message is temporarily stored in the high-speed mobile unit, and a message in which a corresponding radio terminal is called and stored is transmitted.