WO2013042454A1

WO2013042454A1 - Wireless communication system

Info

Publication number: WO2013042454A1
Application number: PCT/JP2012/069001
Authority: WO
Inventors: 雅実細野
Original assignee: 株式会社日立国際電気
Priority date: 2011-09-22
Filing date: 2012-07-26
Publication date: 2013-03-28
Also published as: JP2013070223A

Abstract

The present invention provides a system to transmit an operation termination signal from a line control device without a transmission operation by a wireless terminal. In a wireless communication system (100), a disaster prevention center (110) has a line control device (1) which comprises a termination storage unit (52), etc., in which management information including an ID of a wireless terminal (4) to be operation restricted is registered and managed. When a power input operation is performed on the wireless terminal (4), power ON information including the ID is transmitted in accordance with the radio wave condition of a first wireless channel (7). The disaster prevention center (110) assesses whether or not the wireless terminal (4) is a terminal to be operation restricted, on the basis of the management information and the ID received from the wireless terminal (4). When the wireless terminal (4) is assessed as a terminal to be operation restricted, the line control device (1) transmits an operation restriction signal to the wireless terminal (4) through a wireless base station (3).

Description

Wireless communication system

The present invention relates to a wireless communication system, and more particularly, to a wireless communication system that performs communication between a mobile station (wireless terminal) and a base station by an SCPC method.

In a wireless communication system, wireless communication is performed between a base station and a mobile station. Various types of communication methods are used, but a public system such as a local government disaster prevention system may use an SCPC (Single Channel Per Per Carrier) method (see, for example, Patent Document 1). Further, the SCPC system includes a normal transmission system and an emergency transmission system. In a radio base station (ordinary radio base station) that adopts the regular transmission method, communication is always performed with a radio terminal device (for example, a mobile station) to achieve synchronization. On the other hand, a radio base station (emergency transmission radio base station) adopting an emergency transmission method is necessary, for example, to communicate with a radio terminal device (for example, a mobile station) and synchronize only when requested. Send radio waves only when.

By the way, when a wireless terminal device, which is a mobile station, is lost or stolen, the center station wirelessly transmits a predetermined signal from the base station to the mobile station in order to prevent unauthorized use. Setting to be done. In particular, in a public system such as a disaster prevention system, a reliable operation stop of a lost wireless terminal device is required for proper operation. For example, the base station designates call information (ID information) used as a telephone number at the time of a call in each mobile station and transmits an instruction signal for stopping the operation, and each mobile station has its own device (each mobile station) In response to the reception of the instruction signal including the ID information set to, the operation shifts to the operation stop state.

In a mobile station set to the operation stop state, all functions are disabled except for the function of requesting location registration to the base station when the power is turned on from off. When canceling the operation stop state of the mobile station, the mobile station is stopped by writing the operation permission data from the PC to the mobile station by connecting the mobile station and a predetermined personal computer (PC) by wire. There is a technology for shifting to a usable state after the state is released.

JP 2011-71703 A

By the way, in the generally adopted SCPC digital wireless communication system, the location of the wireless terminal is not managed, and the location registration operation is not performed even when the power of the wireless terminal is turned on. Therefore, there is a problem that an operation stop signal cannot be notified to the wireless terminal unless a transmission operation is performed at the wireless terminal. In addition, since the SCPC digital wireless communication system shares communication and control over a single-channel line, it is not desirable to always perform an operation to stop the operation by turning on the power. There was a problem in coordinating quality.

The present invention has been made in view of such conventional circumstances, and aims to solve the above problems.

The present invention is a wireless communication system in which a center station and a mobile station communicate with each other by an SCPC method. When the mobile station is turned on, an ID corresponding to a base station wave or a radio wave condition of the mobile wave is provided. Whether the center station manages management information including the ID of the mobile station whose operation is restricted and restricts the operation based on the management information and the ID received from the mobile station. If it is determined that the operation is to be restricted, an operation restriction signal is transmitted to the mobile station.

As described above, according to the present invention, in a wireless communication system in which a center station and a mobile station communicate with each other using the SCPC method, when a mobile station is subject to an operation restriction, an operation restriction can be effectively set for the mobile station. it can.

It is a figure which shows the structure of the radio | wireless communications system based on 1st Embodiment. It is a figure which shows the structure of the radio | wireless terminal based on 1st Embodiment. It is a figure which shows the operation | movement stop sequence based on 1st Embodiment. It is a figure which shows the operation | movement stop sequence based on 2nd Embodiment.

Next, modes for carrying out the present invention (hereinafter simply referred to as “embodiments”) will be specifically described with reference to the drawings.

First Embodiment FIG. 1 shows a configuration of a wireless communication system 100 according to the present embodiment. The radio communication system 100 is a system that performs communication by an emergency transmission SCPC method, and is used for a disaster prevention system such as a fire fighting radio system in a local government. In addition, since it is an emergency transmission system, the location registration of the wireless terminal 4 is not performed.

As shown in the figure, the radio communication system 100 includes a disaster prevention center 110, a first radio base station 3, a second radio base station 8, and a radio terminal 4. Here, for convenience of explanation, only one wireless terminal 4 is illustrated, but in general, a plurality of wireless terminals 4 communicate with the first wireless base station 3 or the second wireless base station 8. Do. Further, in the drawing, the configuration is shown mainly focusing on the characteristic features of the present embodiment, and the configuration for realizing the general functions is appropriately omitted.

The first radio base station 3 constitutes the first communication zone 6 and the radio terminal 4 is located. The second radio base station 8 constitutes a second communication zone 10 where the radio terminal 4 is not located.

The disaster prevention center 110 includes a line control device 1 and an operation management device 2. The operation management apparatus 2 includes a management control unit 61, a management monitoring console 62, and a stop target registration unit 63. The management control unit 61 controls the operation management apparatus 2 in an integrated manner. The management monitoring console 62 receives the commander's operation and outputs various instructions and information. The commander can use the management monitoring console 62 to transmit various instructions to the devices under the control (the line control device 1, the first radio base station 3, and the second radio base station 8). Further, the commander can check various information received from the subordinate apparatus on a display screen or the like. The stop target registration unit 63 records the ID of the wireless terminal 4 that is the target of operation restriction. Here, a group code and an individual number unique to the wireless terminal 4 are recorded as IDs.

The line control device 1 is connected to the operation management device 2, the first radio base station 3 and the second radio base station 8, for example, by wire, relays communication between them, and relates to a radio line and the like. Perform various controls. Here, the line control apparatus 1 is connected to the first radio base station 3 via the first approach line 5 and is connected to the second radio base station 8 via the second approach line 9.

As a specific configuration, the line control device 1 includes a line control unit 51 and a stop target storage unit 52. The line control unit 51 performs overall control of each configuration of the line control apparatus 1 and performs process control related to the operation-restricted wireless terminal 4 which is a characteristic process in the present embodiment. The stop target storage unit 52 acquires the ID of the wireless terminal 4 that is the operation control target from the stop target registration unit 63 and records it.

Next, the wireless terminal 4 that is a mobile station will be described with reference to FIG. The wireless terminal 4 includes a main control unit 21, a memory 22, a wireless unit 23, an in-vehicle interface 24, and a user interface 30. The main control unit 21 comprehensively controls the operation of the wireless terminal 4. Further, as the operation restriction target specifying process, the main control unit 21 transmits the ID recorded in the memory 22 according to the radio wave condition of the base station wave or the traveling wave when the power is turned on from off. To do. More specifically, the main control unit 21 determines whether another mobile station (wireless terminal or in-vehicle device) is using the first wireless channel 7, and if it is not in use, the main control unit 21 determines the ID. Send. Detailed processing will be described later.

The memory 22 records various data and functions as a work area. The basic number system (group code and individual number) is recorded in the memory 22 as identification information of the wireless terminal 4. The radio unit 23 performs transmission / reception with the first radio base station 3 and the second radio base station 8 by an SCPC method using an antenna. The in-vehicle interface 24 is an interface with an in-vehicle device (not shown). Although the case where the wireless terminal 4 is an in-vehicle wireless device is illustrated here, the wireless terminal 4 may naturally be a portable wireless device possessed by a person, and in this case, the in-vehicle interface 24 is unnecessary. .

The user interface 30 includes a display unit 31, a microphone unit 32, a speaker unit 33, and a key operation unit 34. The display unit 31 displays information on the screen for the user. The microphone unit 32 acquires sound (voice) emitted by a user or the like. The speaker unit 33 outputs sound (voice) to the user. The key operation unit 34 receives a key operation from the user.

Next, with reference to the operation restriction (operation stop) sequence in FIG. 3, an operation when the operation restriction of the wireless terminal 4 becomes necessary due to loss or the like will be described.

In the operation management apparatus 2, the commander registers the ID (basic number system: group code and individual number) of the mobile station (wireless terminal 4) whose operation is to be stopped in the stop target registration unit 63 using the management monitoring console 62. (S101). Information on the registered ID is sent to the line control device 1 and recorded in the stop target storage unit 52 (S102).

In the wireless terminal 4, when the power is turned on (S103), the main control unit 21 determines whether or not the first wireless channel 7 (wireless line) is being used (S104). Only when the first radio channel 7 is not used (Y in S104), that is, only when the first radio channel 7 is stopped or empty, the synchronous burst signal (SB0) is transmitted. As described above, in the SCPC system, one line (the first wireless channel 7) shares the call and control. As a result, when the first wireless channel 7 is being used elsewhere, if the wireless terminal 4 performs transmission, there is a possibility that other calls will be tightened (congested). In the synchronous burst signal (SB0), the power-on identification information and the ID stored in the memory 22 (“calling ID” in the figure) are transmitted as the sender information a predetermined number of times (S105).

The transmitted sender information is notified to the line control device 1 via the first radio channel 7, the first approach line 5 and the first radio base station 3 (S106).

In the line control device 1, the line control unit 51 searches the individual number information recorded in the stop target storage unit 52 for the individual number notified (S107). When the individual number is not registered (N in S107), normal wireless communication processing using the first wireless channel 7 is performed (S108).

When the individual number is registered (Y in S107), the line control unit 51 notifies the management control unit 61 of the matched ID as operation stop mobile station information to the operation management device 2 (S109). In the operation management apparatus 2, an alarm is displayed together with the ID on the management monitoring console 62 (S110). The commander operates the management monitoring console 62 to perform an operation for stopping the operation of the wireless terminal 4 related to the displayed ID (S111). The input operation stop information (ID) is notified to the first radio base station 3 via the line control device 1 (S112). At this time, the operation history is recorded in the stop target storage unit 52 and the stop target registration unit 63. For example, a flag indicating that the operation stop information has been transmitted, date and time information, and information of the communicating base station are recorded in association with the ID. Then, the first radio base station 3 that has received the notification transmits a synchronized burst signal (SB0) in which the identification information of the operation stop and the target ID are described a predetermined number of times (S113).

In the wireless terminal 4 notified of the operation stop, the notification content is written in the memory 22, and the main control unit 21 stops the operation other than the power on / off (S114). For example, the wireless terminal 4 whose operation has been stopped can be released from the operation stop state only at the factory of the manufacturer of the wireless terminal 4.

As described above, according to the present embodiment, the operation restriction of the lost or stolen wireless terminal 4 can be effectively performed based on the operation restriction wave from the base station (first wireless base station 3). In addition, since the wireless terminal 4 transmits identification information based on power-on only in the case of a stop or an empty line, interference with other communications can be avoided. In particular, when the base station is an emergency transmission system, the location registration of the mobile station is not performed, so that it is possible to achieve both ensuring call quality and ensuring operational restriction.

If the mobile station is an in-vehicle device, it can receive both base station waves (radio waves from the base station 3) and mobile waves (radio waves from other mobile stations) at the same time. Power-on information is transmitted when it is confirmed that both of them are unused, depending on whether the wave is stopped or empty. Further, the wireless terminal 4 cannot receive two simultaneous waves, but can see the base station wave and the moving wave by switching the reception frequency. Therefore, even if the mobile station is a portable wireless device, it is preferable to transmit the power-on information after confirming that neither the base station wave nor the mobile wave is transmitted. In the case of a portable wireless device, only one of a base station wave or a moving wave may be confirmed. In the present embodiment, the operation stop deletion operation is performed by the commander, but naturally, a process of automatically deleting may be performed.

<Second Embodiment> In this embodiment, operation stop information is transmitted not only when the wireless terminal 4 is powered on but also periodically. Even when the wireless terminal 4 is turned on, even when the first wireless channel 7 is in use or the like and cannot be shifted to the operation restriction process, the operation restriction of the wireless terminal 4 can be reliably performed. Since the configuration can be realized by the same configuration as in the first embodiment, the operation will be described with reference to the restriction (operation stop) sequence in FIG.

In the operation management device 2, the commander registers the ID (group code and individual number) of the mobile station (wireless terminal 4) whose operation is to be stopped in the stop target registration unit 63 using the management monitoring console 62 (S201). Information on the registered ID is sent to the line control device 1 and recorded in the stop target storage unit 52 (S202). Further, the line control apparatus 1 notifies the first radio base station 3 and the second radio base station 8, that is, the operation stop information (ID) to all the subordinate base stations (S203). The first radio base station 3 or the like periodically transmits operation stop information using the low-speed associated control channel (SACCH) when the line (the first radio channel 7 or the like) is not used (S204). . That is, regardless of whether the power of the wireless terminal 4 is on or off, the ID and stop command of the wireless terminal 4 whose operation is to be stopped are periodically transmitted. The low-speed associated control channel is a channel that always accompanies the traffic channel and performs low-speed data transmission.

When the power is turned on (S205), the wireless terminal 4 receives the operation stop information, and the main control unit 21 refers to the memory 22, and its own individual information matches the ID included in the operation stop information. Then, the wireless unit 23 transmits a predetermined number of times using a synchronous burst signal (SB0) (S206). When the operation stop process is completed, the main control unit 21 is recorded in the memory 22 with identification information indicating that the operation is restricted (stopped) to the first radio base station 3 through the high-speed associated control channel (FACCH). The individual number is notified as operation stop information (S207). A high-speed associated control channel is a channel that temporarily steals a traffic channel or a user packet channel and performs high-speed data transmission.

When the first radio base station 3 receives the operation stop information by the synchronous burst signal (SB0) or FACCH from the radio terminal 4, the first radio base station 3 receives the ID of the radio terminal 4 as mobile station information of the radio terminal 4 whose operation is restricted. Identification information indicating that the operation is restricted (stopped) is notified to the line control apparatus 1 (S208). Further, the line control device 1 notifies the operation management device 2 of the ID as operation stop mobile station information (S209). The management monitoring console 62 of the operation management apparatus 2 notified of the operation stop mobile station information displays that the operation has been completed and notifies the commander (S210).

In the operation management device 2, when an operation stop deletion operation is performed by the commander (S 211), the target ID (operation stop information) recorded in the stop target registration unit 63 is deleted and the line control device 1 is notified. The operation stop information recorded in the stop target storage unit 52 is deleted (S212). Further, the main control unit 21 of the line control device 1 notifies the operation stop information set in the first radio base station 3 and the second radio base station 8 to be deleted (S213).

As described above, according to the present embodiment, since the operation stop information can be transmitted periodically, even when the operation cannot be stopped when the power of the wireless terminal 4 is turned on, the operation of the wireless terminal 4 can be effectively performed. Can be stopped.

In addition, when performing the process which combined 1st and 2nd embodiment, ID of the radio | wireless terminal 4 of the operation stop object recorded on the stop object memory | storage part 52 or the stop object registration part 63 is managed in common.

The present invention has been described based on the embodiments. This embodiment is an exemplification, and it will be understood by those skilled in the art that various modifications are possible in the combination and processing of each of those components, and such modifications are also within the scope of the present invention. For example, when it is determined in step S104 of FIG. 3 in the first embodiment that the wireless line is in use, the wireless terminal 4 is configured to repeat the process of step S104 a predetermined number of times or a predetermined time. Alternatively, step S104 may be repeated until it is determined that it is not used. As a result, the wireless terminal 4 whose operation should be stopped can be stopped more reliably.

According to the present invention, operation restrictions can be set for a lost or stolen mobile station, which is particularly suitable for a wireless communication system that performs communication between a mobile station and a base station using the SCPC method.

DESCRIPTION OF SYMBOLS 1 Line control apparatus 2 Operation management apparatus 3 1st wireless base station 4 Wireless terminal 5 1st approach line 6 1st communication zone 7 1st wireless channel 8 2nd wireless base station 9 2nd approach line 10 Second communication zone 21 Main control unit 22 Memory 23 Wireless unit 24 In-vehicle interface 30 User interface 31 Display unit 32 Microphone unit 33 Speaker unit 34 Key operation unit 51 Line control unit 52 Stop target storage unit 61 Management control unit 62 Monitoring console 63 Stop target registration unit 100 Wireless communication system 110 Disaster prevention center

Claims

A wireless communication system in which a center station and a mobile station communicate with each other by an SCPC method, and when the mobile station is turned on, the mobile station turns on a power source including an ID according to a radio wave condition of a base station wave or a mobile wave. The center station manages the management information including the ID of the mobile station whose operation is restricted, and determines whether to restrict the operation based on the management information and the ID received from the mobile station. Then, when it is determined that the operation is restricted, an operation restriction signal is transmitted to the mobile station.
If the base station wave or moving wave is being transmitted when the mobile station is turned on, the mobile station does not transmit the power-on information, and if the base station wave or moving wave is stopped or empty The wireless communication system according to claim 1, wherein the power-on information is transmitted.
If the base station wave or mobile wave is being transmitted when the mobile station is turned on, the mobile station does not transmit the power-on information, and the radio status of the base station wave or mobile wave for a predetermined number of times or a predetermined time The wireless communication system according to claim 1, wherein the electrical on-information is transmitted when it is determined that the base station wave or the moving wave is a stop wave or an empty line.