JPH11239376A - Subscriber terminal connector for personal handy phone system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To continue communication in the case of movement of a mobile body 10 at high speed by allowing a mobile communications network to conduct hand-over processing based on high speed movement. SOLUTION: In a mobile body 10 moving at high speed, subscriber terminals 3, 4 and base stations 14, 15 which are connected through radio channels are installed, and mobile station 11 connecting with the base stations 14, 15 via an existing network compatible converter 13 is provided in the mobile body 10 to ensure connection to a mobile communication exchange station 31 by hand-over of an existing mobile communications network 30. The mobile communications exchange station 31 connects with a personal handy phone system network 20 via a common line signal network 40.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a subscriber terminal connecting device of a personal handyphone system which enables a subscriber terminal to continue a radio call with a counterpart subscriber terminal in a mobile body moving at high speed.

[0002]

2. Description of the Related Art A conventional mobile communication system is described in, for example, Japanese Patent Application Laid-Open No. 8-154269. In this mobile communication system, when a mobile station terminal serving as a subscriber terminal detects a deterioration in the reception level of a communication carrier being used with a currently connected wireless base station, the mobile station terminal is being used by a nearby wireless base station. Of the communication carrier of the communication base station, and transmits a numerical value around the communication carrier to the base station controller via the currently connected radio base station. Further, the base station control device searches the used frequency table based on the received frequency,
Determine the handover candidate radio base station, request a handover request to this radio base station, further in response to a request response from the handover candidate radio base station, the base station control device for the mobile station terminal, A handover candidate radio base station is notified, and handover processing between the radio base station and the mobile station terminal is started.

[0003]

However, in such a conventional mobile communication system, when a mobile station terminal moves from a coverage area of one radio base station to a coverage area of another radio base station during a call. Since a handover as a process of switching the communication with the first wireless base station to the next other wireless base station is performed based on the judgment of the mobile station terminal, it takes some time. For this reason, when a mobile station terminal is used in a train or car traveling at high speed,
Before the connection with the wireless base station covering the destination area is completed, communication with the wireless base station connected up to now becomes impossible, and there is a problem that the call is disconnected. Therefore, such a problem is one factor that causes the increase in the number of subscribers of the personal handyphone system to slow down.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and causes a mobile communication network to perform a handover process by high-speed movement, and a mobile base station as a radio base station provided in the mobile communication network. By connecting wirelessly to a subscriber terminal as a mobile station terminal, it is possible to obtain a personal handyphone system subscriber terminal connecting device capable of minimizing system changes and enabling communication during high-speed movement. The purpose is to:

[0005]

In order to achieve the above object, a personal handyphone subscriber terminal connecting device according to the present invention is a radio communication system for connecting a subscriber terminal within a coverage area to a mobile body moving at high speed. A base station to be connected is installed, the base station is connected via an existing network compatible conversion device provided in the mobile unit, and a connection with the mobile communication switching center is established by handover of the existing mobile communication network. The mobile communication switching center is connected to a personal handyphone system network via a common channel signal network.

According to a second aspect of the present invention, there is provided a personal terminal connection system for a personal handyphone system, wherein the mobile unit is provided as two or more vehicles connected to each other, and the base station is provided for each vehicle. is there.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a subscriber terminal connecting device of a personal handyphone system according to the present invention. In FIG. 1, reference numeral 10 denotes a mobile unit, which constitutes a part of an existing mobile communication network 30. A public telephone 12 inside a mobile phone and a mobile station 11 for connecting the same are provided. The mobile unit 10 further includes an existing network compatible conversion device 13 that connects the mobile station 11 and base stations 14 and 15 for mobile units as base stations. In addition,
Reference numerals 3 and 4 denote subscriber terminals as mobile station terminals, in which the subscriber terminal 3 has moved from the outside of the mobile unit 10 to the inside.

On the other hand, the mobile communication network 30 is connected to the mobile station 11 and the mobile public telephone 12 in addition to the mobile station 11.
Wireless base stations 32 and 33 that perform wireless communication in order by handover with the mobile communication switching center 31 that connects them to a common channel signaling network 40. 20 is a personal handy phone system (hereinafter referred to as PHS).
A pseudo base station 21 connected to the mobile communication network 30 via the common channel signaling network 40, and a plurality of base stations 2
5 and 26, and a PHS service can be provided by the PHS database 23, the base station maintenance and management unit 24, and the PHS exchanger 22. In addition, each base station 25,
The subscriber terminals 1, 2, 3, and 4 that move within the coverage areas of the base stations 25, 26, 14, 15
Although shown as if provided for each of the subscriber stations, the subscriber terminals 1, 2, and 3 have shown a state in which they have moved within the coverage area of each of the base stations 25, 26, and 14.

Next, the operation will be described. First, the location registration of the subscriber terminal 3 in the mobile unit 10 will be described. Although the subscriber terminal 2 is located in the reception area of the base station 25, as shown in FIG.
The user moves to the area 4 and becomes the subscriber terminal 3. At this time, the subscriber terminal 3 receives the position information from the mobile base station 14, but transmits a new position registration request signal to the mobile base station 14 because the position information is different from the position information recorded by the subscriber terminal 3. This location registration request signal is converted into a control signal of the mobile communication network by the existing network compatible converter 13 and connected to the pseudo base station 21 of the PHS network 20 using the mobile station 11 and the mobile communication network 30 as relay media, The location is registered in the PHS database 23 of the PHS exchange 22 as a subscriber terminal within the coverage area of the pseudo base station 21. Thereafter, the subscriber terminal 3 receives the PH
It operates as a subscriber terminal located within the coverage area of the pseudo base station 21 in the S network 20.

FIG. 3 shows a calling control sequence at the time of calling according to the present invention. According to this, the mobile base station 14
Normally, a radio link is set up and a call is set up by PHS control between the subscriber terminal 3 and the subscriber terminal 3.
And the mobile station 11 use the normal control sequence for the mobile communication network 30 to communicate between the pseudo base station 21 of the PHS network 20 and the mobile base station 14 (the control line and the control line). Communication channel), and the PHS exchange 2
2 and the pseudo base station 21 to relay
Call connection is performed according to the HS control sequence.

FIG. 4 shows a control sequence when a call is received according to the present invention. According to this, the call requested to be connected by the PHS exchange 22 is determined based on the result of the inquiry to the PHS database 23, from the subscriber terminal 3 in the mobile unit 10.
Is set up for the pseudo base station 21 whose location has been registered, and the pseudo base station 21 uses the mobile communication network 30 to communicate with the pseudo base station 21 using a normal control sequence. A communication channel (control line and communication channel) is secured between the mobile base station 14 and P
The communication between the HS exchange 22 and the pseudo base station 21 is relayed, and a call connection is performed according to a normal PHS control sequence.

Next, a handover process according to the present invention will be described with reference to FIGS. When the subscriber station 3 does not move between base stations, but the mobile station 11 moving at high speed moves from the vicinity of the radio base station 32 in the mobile communication network 30 to the vicinity of the adjacent radio base station 33, the mobile station under the Since the positional relationship between the base station 14 for use and the subscriber terminal 3 does not change, the PH
Without performing the handover process in the S network 20, the handover from the radio base station 32 to the radio base station 33 in the mobile communication network 30 follows the control sequence of the normal mobile communication network 30.

When the mobile station 11 of the mobile unit 10 moves from the vicinity of the radio base station 32 to the vicinity of the radio base station 33, when the reception level from the mobile station 11 drops below a certain value, The other adjacent wireless base station 33 receives the received signal of the mobile station 11, defines a station having a strong radio wave (in this example, the wireless base station 33), and sets the mobile communication switching station 31 and the wireless base station 33 to each other. Channel allocation is performed between the mobile stations 11 to secure a connection at the time of switching, and switching of wireless allocation to the mobile station 11 and disconnection of the wireless base station 32 are performed. This makes it possible to smoothly implement the handover process at the time of high-speed movement, which was limited in PHS service.

FIG. 7 shows an example of the movement of the subscriber terminal within the moving body 10 moving at a high speed. FIG. 7 illustrates a case where a train is used as a moving object. In the train in which the mobile base stations 14 and 15 are mounted on each of the train vehicles A and B, and the mobile station 11 and the existing network compatible converter 13 are installed in the train, the subscriber terminal 3 When moving to the vehicle A, as in the case of the call connection, the existing network compatible converter 13 and the pseudo base station 21 are connected as a communication channel and a control line, and the mobile communication network 30 is used as a trunk line. , The subscriber terminal 3, the mobile base stations 14, 15 and P
The service can be provided by the pseudo base station 21 interfacing with the HS exchange 22.

[0015]

As described above, according to the present invention, a base station for wirelessly connecting a subscriber terminal in a coverage area is installed in a mobile body, and the base station in the mobile body and the base station are installed in the mobile body. By connecting the mobile station of the mobile communication network with the existing network conversion device, the handover processing by the high-speed movement can be executed as the processing in the existing mobile communication network. By applying the present invention to trains and airplanes, the serviceability of the personal handyphone system is significantly improved.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a subscriber terminal connection device of a personal handyphone system according to an embodiment of the present invention.

FIG. 2 is a block diagram illustrating a location registration operation of a subscriber terminal required in the subscriber terminal connection device of the personal handyphone system of the present invention.

FIG. 3 is a sequence diagram showing a call control procedure according to the present invention.

FIG. 4 is a sequence diagram showing an incoming call control procedure in the present invention.

FIG. 5 is a block diagram illustrating a handover processing method according to the present invention.

FIG. 6 is a flowchart showing a handover processing procedure in the present invention.

FIG. 7 is a block diagram illustrating a method for processing a handover within a moving object according to the present invention.

[Explanation of symbols]

1, 2, 3, 4 subscriber terminal 10 mobile unit 11 mobile station 13 converter for existing network 14, 15 base station (base station) for mobile unit 20 PHS network (personal handy phone system network) 22 PHS exchange (personal) Handy phone system exchange) 25,26 base station 30 mobile communication network 31 mobile communication exchange 32,33 radio base station 40 common channel signal network

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[Procedure amendment]

[Submission date] February 12, 1999

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0005

[Correction method] Change

[Correction contents]

[0005]

To achieve the above object, a subscriber terminal connecting device of a personal handyphone system according to the first aspect of the present invention is installed in a moving body that moves at a high speed and joins within a coverage area. Base station that wirelessly connects the mobile terminal to the base station, and connects the base station via an existing network compatible conversion device provided in the mobile body, and performs a handover between the base station and the wireless base station in the existing mobile communication network. A mobile station in the mobile unit for securing connection with a mobile communication switching center ; and a personal handyphone system network connected to the mobile communication switching center via a common channel signal network.
The mobile terminal is located in the mobile body and moves at high speed.
The mobile station is near the first wireless base station in the mobile communication network
Before moving to the vicinity of the adjacent second wireless base station from
Handover processing of personal handy phone system network
The mobile switching center and the second radio base station
Assign a channel to the local
Secure connection at the time of switching and assign wirelessly to the mobile station
Switching and disconnection from the first wireless base station.
Cormorant it is characterized in.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0006

[Correction method] Deleted

Claims (2)

[Claims] Claims: 1. A device installed in a moving body moving at high speed,
A base station that wirelessly connects the subscriber terminals in the coverage area, and a base station that connects the base station via an existing network compatible conversion device provided in the mobile object, and that is connected to a wireless base station in the existing mobile communication network. And a personal handyphone system network connected to the mobile communication switching center via a common channel signal network, the mobile station in the mobile body securing connection with the mobile communication switching center by handover between A personal terminal connection device for a personal handyphone system. 2. The personal handyphone system subscriber according to claim 1, wherein the mobile unit is two or more vehicles connected to each other, and the base station is provided for each vehicle. Terminal connection device.