JP2007142871A - Radio communication system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a radio communication system including: a radio network controller 51; a plurality of base station apparatuses 52A to 52C connected to the radio network controller; and a mobile station apparatus 53 making radio communication with the base station apparatuses wherein the mobile station apparatus preferentially hands off the base station apparatuses in an ordinary operating state while avoiding the base station apparatuses in a standby state. <P>SOLUTION: A management means of the radio network controller manages operating states (ordinary/standby) of the base station apparatuses and a notice means notices the base station apparatuses about the operating state of the other base station apparatuses. A reception means of each base station apparatus receives the notice, and a radio transmission means wirelessly transmits information denoting the operating state of the other base station apparatuses to the mobile station apparatus on the basis of notice contents. A radio reception means of the mobile station apparatus receives the information, and a shift destination control means selects the base station apparatuses in the ordinary operating state as a shift destination by taking precedence over the base station apparatuses in the standby state on the basis of the received information. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a wireless communication system in which a plurality of base station devices are connected to a line control device, and the base station device and the mobile station device communicate wirelessly, and in particular, the base station device in which the mobile station device is in an emergency operation state It is related with the radio | wireless communications system etc. which perform efficiently handing off by preferentially selecting the base station apparatus of a normal operation state.

For example, in a wireless communication system such as a disaster prevention digital wireless system, a plurality of base station devices connected to a line control device are provided, and the base station device and the mobile station device communicate wirelessly. When there are two or more base station device candidates that can be selected as a migration destination along with the movement, the mobile station device performs a handoff process for determining a base station device to be a migration destination from among the candidates. Do.
In addition, a base station device that is normally communicating with the line control device is in a normal operation state, and a base station device that has lost communication with the line control device is in an emergency operation state as a degenerate function. It becomes. As the emergency operation state, for example, the same state as the return communication state in ARIB STD-T79 or the like can be used.

FIG. 6 shows an outline of the normal operation state and the emergency operation state of the base station apparatus.
In this example, three base station devices 52A, 52B, and 52C connected to the line control device 51 are shown. The base station device 52A and the base station device 52C are in a normal operation state, and the base station device 52B is in an emergency state. In operational state.
In the base station devices 52A and 52C in the normal operation state, mobile station devices and the like existing under the same base station device 52A and 52C can be connected so as to be able to talk to each other, and the base station device 52A is under the control of one base station device 52A. The existing mobile station device 61c and the like and the mobile station device 61d and the like existing under the other base station device 52C can be connected via the line control device 51 so as to be able to talk.

  On the other hand, in the base station device 52B in an emergency operation state, the mobile station devices 61a, 61b, etc. existing under the base station device (same base station device) 52B can be connected so as to be able to talk to each other. Since the connection with the device 51 is interrupted, the mobile station devices 61a, 61b, etc. existing under the base station device 52B and the mobile station devices 61c, 61d, etc. under the other base station devices 52A, 52C Cannot be connected to make a call. That is, under the base station device 52B in an emergency operation state, only the mobile station devices 61a, 61b, etc. that are capturing the base station device (same base station device) 52B without using the line control device 51. You can make a call.

JP 2004-201177 A Municipal digital mobile communication system TYPE1 standard, ARIB STD-T79 1.0 version, Japan Radio Industry Association

In the wireless communication system as described above, for example, when the base station apparatus partially enters the emergency operation state instead of all the base station apparatuses, the mobile station apparatus selects the base station apparatus in the normal operation state as much as possible. It is often desirable to communicate with each other.
However, in the wireless communication system as described above, there is a problem in that it is not possible to efficiently select the base station device in the normal operation state while avoiding the base station device in the emergency operation state by the mobile station device. .
The present invention has been made in view of such a conventional situation, and a mobile station apparatus avoids a base station apparatus in an emergency operation state and preferentially selects a base station apparatus in a normal operation state to perform handoff. An object of the present invention is to provide a wireless communication system or the like that can efficiently perform the communication.

In order to achieve the above object, a wireless communication system according to the present invention includes a line control device, a plurality of base station devices connected to the line control device, and a mobile station device that communicates with the base station device by radio. The configuration is as follows.
That is, in the line control apparatus, the management means manages the communicable base station apparatus as a normal operation state and manages the inoperable base station apparatus as an emergency operation state, and the notification means manages the base station apparatus in a normal operation state. In response, the operation status of the other base station apparatus is notified.
In the base station apparatus, the receiving means receives the notification from the line control apparatus, and the wireless transmission means displays information indicating the operational status of the other base station apparatus based on the content of the received notification. It transmits by radio | wireless with respect to the said mobile station apparatus.
In the mobile station apparatus, the radio reception means receives information indicating the operation state of the other base station apparatus from the base station apparatus, and the transition destination control means is based on the received information in the normal operation state. The base station apparatus is prioritized over the base station apparatus in an emergency operation state as a transition destination.

  Therefore, whether the base station device is in a normal operation state or an emergency operation state is managed by the line control device, and information indicating the operation state of other base station devices is transmitted from the base station device to the mobile station device. Based on this information, the mobile station device gives priority to the base station device in the normal operation state as the transition destination. For example, the mobile station device avoids the base station device in the emergency operation state and avoids the base station device in the normal operation state. Devices can be preferentially selected and handed off. Further, for example, since the operation state of another base station device is notified from the base station device communicating with the mobile station device, the above handoff can be performed efficiently.

Here, as an operation state when the base station device can communicate with the line control device (normal operation state) and an operation state when the base station device cannot communicate with the line control device (emergency operation state), Various operational states may be used for each. For example, as a normal operation state, it is possible to communicate between mobile station devices and the like existing under the base station device (the same base station device) of the local station, and under the control of the base station device of the local station The operation state that enables communication between the mobile station device and the like existing in the mobile station and the mobile station device existing under the control of another base station device is used. An operation state is used in which communication is possible only between mobile station devices or the like existing under the base station device (the same base station device).
Further, in the line control device, for example, the operation state (whether the normal operation state or the emergency operation state) of each connected base station device is stored and managed in a memory, and The stored content is updated in response to detecting a change in communication availability.

In addition, as the other base station device in the case where the line control device transmits information indicating the operational state of another base station device to the certain base station device and notifies it, for example, the certain base station device A base station device in the vicinity of the certain base station device such that the communicable area is adjacent may be used, and various numbers may be used as the number of the other base station devices.
Similarly, as another base station device in the case where information indicating the operation state of another base station device is transmitted and notified from a certain base station device to the mobile station device, for example, the certain base station A base station device in the vicinity of the certain base station device such as a device and a communicable area adjacent to each other may be used, and various numbers may be used as the other base station devices.

  In addition, various modes may be used as modes in which a mobile station device prioritizes a base station device in a normal operation state over a base station device in an emergency operation state, for example, as a transition destination candidate. When the base station apparatus in the normal operation state is included, a mode in which the base station apparatus in the normal operation state is preferentially shifted can be used. Also, for example, when there are a plurality of base station apparatuses in the normal operation state in the migration destination candidates, the base station apparatus (for example, the best) among them is set as the migration destination, and the migration destination candidate is in emergency operation When only the base station apparatus in the state exists, the base station apparatus (for example, the best) among them is set as the transition destination or is not shifted to the base station apparatus in the emergency operation state.

In addition, as the base station device that is a candidate for the transfer destination, for example, a base station device that can normally wirelessly communicate with the mobile station device that is about to transfer is used, and the reception level from the base station device and the base station A base station apparatus having a sufficient error rate of a received signal from the apparatus is used.
Further, in the mobile station apparatus, for example, a base station apparatus to be transferred is determined based on information received from one communicating base station apparatus. As another example, two or more base stations are determined. It is also possible to determine a base station apparatus as a transfer destination based on information received from the apparatus.

In a radio communication system according to the present invention, in a configuration including a channel control device, a plurality of base station devices connected to the channel control device, and a mobile station device that communicates with the base station device by radio, the following The configuration.
That is, in the base station apparatus, the detecting means is in an operation state (normal operation state) in which the local station apparatus (the base station apparatus) can communicate with the line control apparatus, or an operation incapable of communicating with the line control apparatus. Whether the state is an emergency operation state is detected, and the wireless transmission unit wirelessly transmits information indicating the operation state of the local station device to the mobile station device based on the detection result.
In the mobile station apparatus, the radio reception means receives information indicating the operation state of the base station apparatus (own station apparatus) from the base station apparatus, and the transfer destination control means is based on the received information. The base station apparatus in the normal operation state is given priority over the base station apparatus in the emergency operation state as the migration destination.

Accordingly, whether the base station apparatus is in a normal operation state or an emergency operation state is detected by the base station apparatus, and the information is transmitted to the mobile station apparatus, and the mobile station apparatus is in the normal operation state based on the information. Since the base station device is prioritized as the transfer destination, for example, the mobile station device can avoid the base station device in the emergency operation state and preferentially select the base station device in the normal operation state to perform handoff.
Here, in the mobile station apparatus, for example, based on information received from one or two or more base station apparatuses, a base station apparatus to be a migration destination is determined.

The base station apparatus according to the present invention is configured as follows in the configuration that is connected to the line control apparatus and communicates with the mobile station apparatus by radio.
That is, the receiving means receives a notification from the line control device whether the other base station device is in a normal operation state in which communication with the line control device is possible or in an emergency operation state in which communication with the line control device is impossible. Then, based on the content of the received notification, the wireless transmission means wirelessly transmits information indicating the operation state of the other base station device to the mobile station device.
Therefore, for example, by notifying the operating state of another base station device from the base station device to the communicating mobile station device, the mobile station device can efficiently determine the handoff transfer destination. can do.

The mobile station apparatus according to the present invention has the following configuration in which the base station apparatus that is the communication partner among the plurality of base station apparatuses connected to the line control apparatus communicates wirelessly.
That is, the information indicating whether the radio receiving means is in a normal operation state in which a base station device that is a candidate for the transfer destination can communicate with the line control device or in an emergency operation state incapable of communication with the line control device. Based on the received information, the transfer destination control means prioritizes the base station device in the normal operation state over the base station device in the emergency operation state based on the received information. As the destination.
Therefore, the mobile station apparatus can preferentially select and handoff the base station apparatus in the normal operation state while avoiding the base station apparatus in the emergency operation state based on the information from the base station apparatus.

The mobile station apparatus according to the present invention has the following configuration as a configuration example.
That is, the output means outputs information related to the operation state of the base station apparatus that is a candidate for the migration destination to the user based on the received information (from the base station apparatus). An accepting unit accepts information specifying a base station device as a migration destination from a user. The migration destination control means sets the base station apparatus designated by the received information as the migration destination.
Therefore, the operation state of the base station apparatus that is a candidate for the transfer destination can be output and notified to the user, and the base station apparatus specified by the user who has grasped the notification contents is transferred to the handoff destination It can be. For example, in a situation where the transition destination candidate includes a base station device in a normal operation state and a base station device in an emergency operation state, but it is preferable to move to a base station device in an emergency operation state, the designation by the user Accordingly, it is possible to move to a preferable base station apparatus.

Here, various types of information may be used as the information regarding the operation state of the base station device to be output. For example, information for identifying each base station device or each base station device is in a normal operation state Or information for identifying whether it is an emergency operation state or the like can be used.
Various modes may be used as a mode for outputting information. For example, a mode in which information is displayed on a screen can be used.
In addition, various modes may be used as a mode for receiving information specifying a base station device as a transition destination from the user. For example, the user may select one or more base station devices indicated by the screen display. A mode in which the information is selectively specified can be used.

  As described above, according to the wireless communication system and the like according to the present invention, the line control device manages the operation state (normal / emergency) of each base station device and operates other base station devices with respect to the base station device. The base station device notifies the mobile station device of the operation state of the other base station device based on the content of the notification, and the mobile station device is in the base state of the normal operation state based on the content of the notification. Since the station device is prioritized over the base station device in the emergency operation state as the transition destination, for example, the mobile station device avoids the base station device in the emergency operation state and gives priority to the base station device in the normal operation state. Selection and handoff can be performed efficiently.

  In addition, according to the wireless communication system and the like according to the present invention, the base station device detects the operation state (normal / emergency) of the own station device and notifies the operation state of the own station device to the mobile station device. Since the device prioritizes the base station device in the normal operation state over the base station device in the emergency operation state as the transition destination based on the content of the notification, for example, the mobile station device sets the base station device in the emergency operation state to By avoiding this, it is possible to preferentially select a base station apparatus in a normal operation state and perform handoff.

Embodiments according to the present invention will be described with reference to the drawings.
First, an example of a system to which the present invention can be applied will be described with reference to FIGS.
FIG. 1 shows a configuration example of a fire fighting digital radio system which is an example of a disaster prevention digital radio system.
The firefighting digital wireless system of this example includes a command device (command console) 1 having an operation unit 11, a display unit 12, and a storage unit 13, a line control device (wireless line control device) 2, and a plurality of n bases. There are provided station apparatuses A1 to An, a plurality of n remote controllers B1 to Bn, and a plurality of m mobile station apparatuses C1 to Cm.
Each of the mobile station devices C1 to Cm is composed of an in-vehicle device 21 and a portable device 22, and has a table 23 on which the portable device 22 is placed.

The firefighting digital wireless system of this example can be used for regional disaster prevention in each prefecture such as Tokyo. In this example, the command device 1 and the line control device 2 are installed in the disaster prevention center, and the base station devices A1 to An are installed in the fire station, on the building, outside the city, on the mountain, etc. The controllers B1 to Bn are installed in the fire department, and the mobile station devices C1 to Cm are installed in a vehicle such as a fire engine or an ambulance.
In each vehicle, for example, the in-vehicle device 21 and the table 23 are mounted and attached to each vehicle, and the portable device 22 can be carried by a person or placed on the table 23.
It is to be noted that a plurality of systems similar to those shown in FIG. 1 are provided, and one of the systems is operated and another system is kept in standby, and the spare system is operated when the operating system fails. Therefore, it is possible to adopt a configuration in which the entire operation is continued.
Various devices such as a fixed device, a semi-fixed device, a portable device, and a portable device may be used as subordinate devices that communicate with the base station devices A1 to An.

The outline | summary of the operation | movement performed in the firefighting digital radio system of this example is shown.
In the command device 1, the operation unit 11 is operated by a person (commander) to input various instructions and information, and the display unit 12 displays and outputs various information to be displayed on the screen. The stored storage unit 13 stores various information to be stored.
The commander can transmit various instructions from the command device 1 to the devices under its control (line control device 2, base station devices A1 to An, remote controllers B1 to Bn, mobile station devices C1 to Cm). Further, the commander can view various information received by the commanding device 1 from the devices under its control on the screen display. Necessary information is held in the storage unit 13.

The line control device 2 is connected to the command device 1 and a plurality of base station devices A1 to An, for example, by wire, relays communication between them, and performs various controls relating to a wireless line and the like.
Each of the base station devices A1 to An communicates wirelessly with the mobile station devices C1 to Cm existing in a communicable area (area) and communicates with each of the remote controllers B1 to Bn connected by wire. Communicate between.
Each of the remote controllers B1 to Bn communicates with each of the base station devices A1 to An connected by wire, and has, for example, the same function as the mobile station device, and is operated by a person (signer). Is done.
Each of the mobile station devices C1 to Cm communicates wirelessly with the base station devices A1 to An in which the mobile station devices C1 to Cm are accommodated.

In FIG. 2, the structural example of the vehicle equipment 21 and the structural example of the portable device 22 are shown.
The in-vehicle device 21 includes an antenna 31, a radio unit 32, a key operation unit 33, a display unit 34, a microphone unit 35 having a microphone, a speaker unit 36 having two speakers, a memory 37, and a portable interface. 38 and a control unit 39.
The portable device 22 includes an antenna 41, a wireless unit 42, a key operation unit 43, a display unit 44, a microphone unit 45 having a microphone, a speaker unit 46 having a speaker, a memory 47, an in-vehicle interface 48, A control unit 49 is provided.
Here, the internal processing function of the in-vehicle device 21 and the internal processing function of the portable device 22 are generally the same, although there are differences, for example, the number of speakers is different.

  In the in-vehicle device 21, the wireless unit 32 wirelessly transmits and receives signals to and from the base station apparatuses A <b> 1 to An through the antenna 31, the key operation unit 33 receives a key operation from a person (user), and the display unit 34 displays information on the screen for the user, the microphone unit 35 inputs sound (sound) emitted by the user or the like, the speaker unit 36 outputs sound (sound) to the user, and the memory 37 stores, for example, call information (ID information) as a telephone number to be called, the portable interface 38 communicates with the in-vehicle interface 48 of the portable device 22 by, for example, an optical signal, and the control unit 39 performs various controls. I do.

  Similarly, in the portable device 22, the wireless unit 42 wirelessly transmits and receives signals to and from the base station apparatuses A <b> 1 to An through the antenna 41, and the key operation unit 43 receives a key operation from a person (user). The display unit 44 displays information to the user on the screen, the microphone unit 45 inputs sound (sound) emitted by the user, and the speaker unit 46 outputs sound (sound) to the user. Then, the memory 47 stores, for example, call information (ID information) that is a telephone number to be called, the in-vehicle interface 48 communicates with the portable interface 38 of the in-vehicle device 21 by, for example, an optical signal, and the control unit 49 Perform various controls.

Here, the same information is set as the call information (ID information) stored in the memory 37 of the in-vehicle device 21 and the call information (ID information) stored in the memory 47 of the portable device 22.
The in-vehicle device 21 and the portable device 22 can communicate between the portable interface 38 and the in-vehicle interface 48 in a state where the portable device 22 is placed on the pedestal 23. Communication is not performed between the portable interface 38 and the vehicle-mounted interface 48 in a state where the portable interface 38 is removed from the table 23 and carried.

In this example, in a state where the portable device 22 is set (placed) on the pedestal 23, the portable device 22 does not particularly function, and reception from the base station devices A1 to An or base station devices A1 to An are performed. Transmission, key input, display output, voice input, voice output, and the like are all performed by the in-vehicle device 21.
On the other hand, in a state in which the portable device 22 is detached from the table 23, the portable device 22 receives from the base station devices A1 to An, transmits to the base station devices A1 to An, key input, display output, and audio. Input, audio output, and the like are all performed. In this state, the vehicle-mounted device 21 performs only reception from the base station devices A1 to An, display output, and audio output. That is, the same call information (ID information) is set in the in-vehicle device 21 and the portable device 22, and reception can be performed simultaneously in both, but transmission is performed one by one.

In addition, the portable device 22 removed from the pedestal 23 performs wireless communication directly with the base station devices A1 to An without using the in-vehicle device 21. This point is considered to be different from a handset of a normal parent-child phone.
In addition, the state in which the portable device 22 is set on the table 23 or the state in which the portable device 22 is removed from the table 23 is detected by the in-vehicle device 21 or the portable device 22 and is controlled by the respective control units 39 and 49 according to the state at that time. Executable functions (or non-executable functions) are set.

The in-vehicle device 21 has two speakers. For example, when the portable device 22 is detached from the pedestal 23, the contents of a call transmitted from the base station devices A <b> 1 to An to the portable device 22 are one. The voice of the call transmitted from the portable device 22 to the base station apparatuses A1 to An is output from the other speaker.
As an example, mobile station devices C1 to Cm are provided in a fire truck or the like, and the fire truck or the like is at a site such as a fire, and a member goes out of the fire truck or the like with a portable device 22. When other members are active and wait inside the fire engine or the like, the other members listen to the sound output from the vehicle-mounted device 21, so that the portable device 22 and the base station devices A1 to An are connected. You can listen to the content of calls made at.
Note that, for example, different frequencies are used for downlink communication from the base station devices A1 to An to the mobile station devices C1 to Cm and uplink communication from the mobile station devices C1 to Cm to the base station devices A1 to An. .

  In addition, as communication between the base station devices A1 to An (for example, the command device 1) and the mobile station devices C1 to Cm, for example, a configuration in which press talk communication is performed may be used. A configuration in which two-way simultaneous communication such as a normal mobile phone is performed may be used, or a configuration in which communication in another mode is performed may be used. Further, information for notification is transmitted from the base station devices A1 to An to the mobile station devices C1 to Cm, and the mobile station devices C1 to Cm (automatically) receive the information in response to the reception of the information. A configuration that outputs data can also be used.

In the case of a fire engine, for example, press talk communication is used, the mobile station devices C1 to Cm of a plurality of fire engines are called from the command device 1, and group communication (for example, group communication on a business link) is performed. By carrying out a press talk communication in the inside, it is possible to perform the same fire site treatment by these plural fire engines.
In the case of an ambulance, for example, communication such as a normal telephone is used, and a call can be performed by speaking (calling) and receiving.
In addition, for example, the vehicle-mounted device 21 and the portable device 22 can be provided with a function capable of performing wireless communication even at a distance between the vehicle-mounted device 21 and the portable device 22. In this case, as an example, when the portable device 22 is taken out of the vehicle in a dead zone such as in a tunnel, the in-vehicle device 21 and the portable device 22 can be used to communicate with each other using a transceiver.

A first embodiment of the present invention will be described.
FIG. 3 shows a configuration example of a radio communication system according to an embodiment of the present invention.
The wireless communication system of this example includes, for example, a line control device 51 connected to a command device, and a plurality (three in this example) of base station devices 52A, 52B, and 52C connected to the line control device 51 by wires. , A plurality of mobile station devices that can move (in this example, only one mobile station device 53 is shown). Here, the three base station apparatuses 52A, 52B, and 52C are installed such that their communicable areas (areas) exist in the vicinity (adjacent in this example).

In this example, the connection state between the line control device 51 and the two base station devices 52A and 52C is normal, the two base station devices 52A and 52C are in a normal operation state, and the line control device 51 and The connection state with one base station apparatus 52B is not connected, and the base station apparatus 52B is in an emergency operation state. And the case where the mobile station apparatus 53 transfers by handoff from subordinate of base station apparatus 52A to subordinate of another base station apparatus is shown.
The mobile station device 53 receives an operation such as a key input from a user (user), a microphone unit that inputs a sound (voice) emitted by the user, or outputs a sound (voice) to the user. And a display unit that displays and outputs characters and images on the screen to the user, and a memory that stores various types of information.

Each of the base station devices 52A to 52C wirelessly transmits notification information by a notification signal to the mobile station device 53 that exists in a communicable region, for example, at regular intervals.
In this example, the broadcast information transmitted by the control channel from the base station devices 52A to 52C includes a frequency code that is information specifying the frequency as information (adjacent base station information) related to the adjacent base station device. Yes. In addition, in the adjacent base station information, a predetermined bit (flag) is added as information (operation status identification information) for identifying whether the corresponding base station device is in a normal operation state or an emergency operation state. It is. Here, the number of other base station apparatuses to be notified of neighboring base station information from a certain base station apparatus may be arbitrary, for example, five or six.
In the broadcast information transmitted from the base station devices 52A to 52C, as information for identifying whether the own station device (the base station devices 52A to 52C) is in a normal operation state or an emergency operation state, Predetermined bits (flags) are added.
Each bit (flag) described above takes, for example, a value of 0 or 1, and can identify two types of states.

Also, the line control device 51 detects and manages whether other base station devices adjacent to the base station devices 52A to 52C are in a normal operation state or an emergency operation state. Notification is made to the station devices 52A to 52C. For this reason, the base station device 52B in the emergency operation state does not receive the notification from the line control device 51, and therefore does not include the operation state identification information regarding other adjacent base station devices as effective information in the broadcast information. .
For example, the line control device 51 periodically attempts to communicate with each of the base station devices 52A to 52C, detects and manages that the base station devices 52A and 52C capable of communicating are in a normal operation state, The base station device 52B that cannot communicate (is disconnected) is detected and managed as being in an emergency operation state.

FIG. 4 shows an example of a part of a notification signal wirelessly transmitted from the base station apparatus 52A in a normal operation state as an example of a part of the format of the notification signal.
In the notification signal of this example, the frequency used by the own station device (base station device 52A) and the operation state of the own station device (in this case, the normal operation state) and the adjacent base station device 52B are specified. Used for radio transmission and information for specifying the operation state (in this case, emergency operation state) of the base station apparatus 52B, the frequency used by the other adjacent base station apparatus 52C for radio transmission, and the base station apparatus 52C stores information for specifying the operation state of 52C (here, the normal operation state).
Further, for example, information such as numbers and names assigned to the base station devices 52A to 52C may be included in the broadcast information.

When the mobile station apparatus 53 is deteriorated in the received electric field from the base station apparatus 52A that is currently captured and used as a communication partner, the base station apparatus 53B, any of the base station apparatuses 52B and 52C existing in the vicinity It is determined whether or not to shift to the station apparatus, and the base station apparatus to be captured is switched.
In this example, the mobile station device 53 is normal when the base station device 52B and 52C that are candidates for the handoff transfer destination include the base station device 52C in the normal operation state and the base station device 52B in the emergency operation state. Prioritize the base station device 52C in the operating state, and shift to the base station device 52C in the normal operating state.

Also, in the case where there are a plurality of base station devices in the normal operation state that are candidates for the handoff transition destination, the mobile station device 53 detects, for example, the reception level (for example, RSSI level) from each base station device. A mode of selecting the base station apparatus with the highest reception level or detecting the error rate (for example, bit error rate) of the received signal from each base station apparatus and selecting the base station apparatus with the lowest error rate One base station apparatus is selected as a migration destination according to an aspect or an aspect considering both the reception level and the error rate.
For example, in a normal handoff, the mobile station device 53 moves to a base station device that satisfies the conditions such as the strongest received electric field among the candidates for the transfer destination. In this example, the base station device is in an emergency operation state. If so, the base station apparatus is shifted to another base station apparatus in the normal operation state.
When all the base station apparatuses that are candidates for handoff transition are in an emergency operation state, for example, the base station apparatus transitions to a base station apparatus that satisfies the conditions such as the strongest received electric field, or The communication with the currently communicating base station apparatus is continued.

In this example, the mobile station apparatus 53 is based on the broadcast information received from the currently communicating base station apparatus 52A, and the other adjacent base station apparatuses 52B and 52C (corresponding frequency codes in this example). The number and operation state are detected, and the handoff destination is determined based on the detection result.
Here, as another configuration example, the mobile station device 53 switches to the transmission frequency from the base station devices 52B and 52C other than the base station device 52A that is currently communicating, and from the base station devices 52B and 52C. It is also possible to receive and analyze broadcast information. However, in general, when the mobile station device 53 synchronizes communication with one base station device 52A, it does not synchronize communication with the other base station devices 52B and 52C. For the other base station devices 52B and 52C, only the reception level or the error rate of the received signal is detected.
For this reason, as in this example, in the mobile station device 52, it is preferable to detect information on the other base station devices 52B and 52C from the broadcast information from the currently communicating base station device 52A. It is considered preferable because it eliminates the sound interruption associated with switching and can maintain good communication quality.

FIG. 5 shows an example of information stored in the memory of the mobile station device 53. In this example, the content of such information is displayed on the screen of the mobile station device 53.
In the stored contents or displayed contents shown in FIG. 5, information (A, B, C in this example) for identifying the base station apparatuses 52A to 52C in order from the highest reception level (in this example, RSSI level). Are lined up. And about each base station apparatus 52A-52C, the information (this book) which shows whether the value of the reception level, the normal operation state, or the emergency operation state, and whether it was selected as the handoff transfer destination In the example, a circle (◯ indicating that a circle is selected) is associated.
In the case of this example, the mobile station device 53 has the highest reception level from the base station device 52B that is the candidate for the migration destination, but is in a normal operation state because the base station device 52B is in an emergency operation state. Another base station device 52C is determined as the migration destination.

As described above, in the wireless communication system of this example, the operation state (normal or , Emergency), and the operation state (normal or emergency) of other base station devices in the vicinity are performed.
The mobile station device 53 is based on broadcast information from the base station device 52A in which the mobile station device (the mobile station device 53) is accommodated or based on broadcast information from other neighboring base station devices 52B and 52C. Based on the detection result, the operation state of other base station devices 52B and 52C in the vicinity is detected, and the base station device 52B in the emergency operation state is avoided and the base station device 52C in the normal operation state is preferentially used. Transition. In addition, the mobile station device 53 notifies the user of information such as a reception level and an operation state regarding the base station device 52A and the neighboring base station devices 52B and 52C that are currently communicating.

  As a configuration example, in this example, in a wireless communication system having a line control device 51, a plurality of base station devices 52A to 52C, and a plurality of mobile station devices 53, each of the plurality of base station devices 52A to 52C Each mobile station that performs loopback communication control when its own station apparatus is in an emergency operation state, transmits broadcast information including information indicating that it is in an emergency operation state, and receives the broadcast information When handoff is performed, the device 53 lowers the rank of the handoff candidate for the base station device in the emergency operation state, thereby raising the rank of the handoff candidate for the base station devices around the base station device in the emergency operation state.

  As another configuration example, in this example, each of the plurality of base station devices 52A to 52C is a wireless communication system having a line control device 51, a plurality of base station devices 52A to 52C, and a plurality of mobile station devices 53. Performs loopback communication control when the local station apparatus is in an emergency operation state, and in the line control apparatus 51, any base station apparatus among the plurality of base station apparatuses 52A to 52C is in an emergency operation state. To the base station device having a radio area adjacent to the base station device that has entered an emergency operation state, and the base station device that has received the signal When the mobile station device 53 that has transmitted the broadcast information including the information indicating that there is a base station device in an emergency operation state and information related thereto and performs the handoff, performs emergency operation. By demote the rank of handoff candidate base station apparatus of the state, increasing the order of the handoff candidate base station apparatus of the surrounding base station apparatus of the emergency operational state.

Therefore, in the wireless communication system of this example, even when the plurality of base station devices 52A to 52C are partially in an emergency operation state, the mobile station device 53 captures the base station device in the normal operation state. It can be operated without being isolated from the system as much as possible.
Further, in the wireless communication system of this example, the mobile station device 53 grasps the normal / emergency operating state of the other adjacent base station devices 52B and 52C based on the broadcast information from the communicating base station device 52A. Therefore, it is not necessary to switch to the frequency of a base station apparatus that does not actually shift (in this example, a base station apparatus in an emergency operation state), and sound interruptions can be reduced. Specifically, for example, the mobile station device 52 receives and inspects broadcast information transmitted from the other base station devices 52B and 52C separately from the base station device 52A that is currently communicating in synchronization. Therefore, in the configuration for determining the operation state, it is necessary to interrupt and inspect the communication with the base station apparatus 52A that has been synchronized once. A configuration in which the operation state of the other base station devices 52B and 52C is determined based on notification information from the communicating base station device 52A is preferable.

Note that, in the line control device 51 of this example, a management unit is configured by a function of managing the operation state (normal / emergency) of each of the base station devices 52A to 52C connected by wire, and each base station device 52A to 52A to 52C. The notification means is configured by the function of notifying the operation status of another base station apparatus to 52C.
Further, in the base station apparatuses 52A to 52C of this example, the receiving means is configured by the function of receiving the notification from the line control apparatus 51, and the detecting means is configured by the function of detecting the operation state of the own station apparatus. The wireless transmission means is configured by the function of wirelessly transmitting information indicating the operational status of other base station devices and information indicating the operational status of the local station device.
Further, in the mobile station device 53 of this example, a wireless reception unit is configured by a function of receiving information wirelessly transmitted from the base station devices 52A to 52C, and the base station device in a normal operation state is configured based on the received information. The transfer destination control means is configured by the function of giving priority to the handoff transfer destination.

A second embodiment of the present invention will be described.
The description of the same configuration and operation as in the first embodiment will be omitted or simplified.
The mobile station apparatus 53 of this example notifies the user by displaying on the screen the operational status of the base station apparatuses 52B and 52C that are candidates for handoff transfer destinations. As the contents of this screen display, for example, the contents as shown in FIG. 5 can be used.
In addition, the mobile station device 53 of this example accepts designation of a base station device as a handoff destination by an operation input by the user, and moves to the base station device designated by the user.

  For example, if the mobile station device 53 is configured to automatically preferentially capture and handoff the base station device 52C in the normal operation state, the base station device 52B in the emergency operation state as long as there is the base station device 52C in the normal operation state. Will not be captured. However, since there is a situation where it is preferable to handoff to the base station apparatus 52B in the emergency operation state, the mobile station apparatus 53 of this example has base station apparatuses 52B and 52C that are candidates for the migration destination by manual selection by the user, for example. The information such as the received electric field and the normal / emergency operation state is displayed on the screen, and the user can select and specify the base station apparatus as the transfer destination. Thereby, the user can designate the base station device 53B in the emergency operation state, or can designate the base station device 53C in any normal operation state.

  Here, as a situation where it is preferable to handoff to the base station device in an emergency operation state, for example, the mobile station device 53 continues to exist under the same base station device as in the same fire department or the like, and the local information In situations where it is desirable to continue receiving voice calls, local calls, local group communications, etc., or where it is desired to ensure that the number of mobile station devices accommodated by a base station device in a normal operation state is secured for other mobile station devices. is there. For group communication, for example, when setting a number of a mobile station device belonging to the same group in a device higher than a base station device, group communication may be continued even after handoff of the mobile station device. Although it is possible, in a case where specific information is reported only to a mobile station device that is under the control of a specific base station device, when the mobile station device moves under control of another base station device, the specific information is It becomes impossible to receive.

The mobile station device 53 can also notify the user by displaying information for notifying the schedule of the handoff to be performed and the result of the handoff that has already been performed on the screen.
Specifically, notifying that it is scheduled to move to the subordinate of the base station device in the emergency operation state, notifying the result of moving to the subordinate of the base station device in the emergency operation state, Informing one or more of notifying that it is scheduled to shift to a subordinate of a base station apparatus in a normal operation state or notifying a result of shifting to a subordinate of a base station apparatus in a normal operation state Can do. In addition, for example, an aspect in which the above-described transition result is notified only when the base station apparatus designated by the user is migrated, or by the mobile station apparatus 53 (not automatically designated by the user) An aspect in which the above-described transition result is notified only when the base station apparatus is selected, or an aspect in which the above-described transition result is notified in both cases can be used.

  Note that in the mobile station device 53 of this example, a wireless reception unit is configured by a function of receiving information indicating the operation state of the base station device of the own station or other station from the base station devices 52A to 52C, and the received information Based on this, the output means is configured by a function for displaying on the screen information related to the operation state of the base station device that is a candidate for the handoff transition destination, and the user can specify the base station device as the handoff transition destination. The accepting means is configured by the accepting function accordingly, and when the handoff transition destination is automatically determined based on the received information, the base station apparatus in the normal operation state is given priority as the handoff transition destination, When a base station apparatus as a transfer destination is designated, a transfer destination control unit is configured by a function of using the designated base station apparatus as a handoff transfer destination.

Here, the configuration of the system or apparatus (device) according to the present invention is not necessarily limited to the configuration described above, and various configurations may be used. The present invention can also be provided as, for example, a method or method for executing the processing according to the present invention, a program for realizing such a method or method, or a recording medium for recording the program. It is also possible to provide various devices and systems.
The application field of the present invention is not necessarily limited to the above-described fields, and the present invention can be applied to various fields.
In addition, as various processes performed in the system or apparatus (device) according to the present invention, for example, the processor executes a control program stored in a ROM (Read Only Memory) in a hardware resource including a processor and a memory. The configuration controlled by doing so may be used, and for example, each functional means for executing the processing may be configured as an independent hardware circuit.
The present invention can also be understood as a computer-readable recording medium such as a floppy (registered trademark) disk or a CD (Compact Disc) -ROM storing the control program, and the program (itself). The processing according to the present invention can be performed by inputting the program from the recording medium to the computer and causing the processor to execute the program.

It is a figure which shows the structural example of a firefighting digital radio system. It is a figure which shows the structural example of a vehicle equipment and a portable device. It is a figure which shows an example of a structure of a radio | wireless communications system, and an example of handoff. It is a figure which shows an example of an alerting | reporting signal. It is a figure which shows an example of the memory content of memory, or the content displayed on a screen. It is a figure for demonstrating normal operation and emergency operation.

Explanation of symbols

  1 .... Command device, 2, 51 ... Line control device, 11. Operation unit, 12, 34, 44 ... Display unit, 13. Storage unit, 21 ... On-vehicle device, 22 ... Portable device, 23 .. Station, A1-An, 52A, 52B, 52C ... Base station device, B1-Bn ... Remote controller, C1-Cm, 53, 61a-61d ... Mobile station device, 31, 41 ... Antenna 32, 42 .. Wireless unit, 33, 43 .. Key operation unit, 35, 45 .. Microphone unit, 36, 46 .. Speaker unit, 37, 47 .. Memory, 38 .. Portable interface, 39, 49.・ Control unit, 48 ・ ・ In-vehicle interface,

Claims (5)

In a radio communication system having a line control device, a plurality of base station devices connected to the line control device, and a mobile station device that communicates with the base station device by radio,
The line control device includes a management unit that manages a base station device that can communicate as a normal operation state and a base station device that cannot communicate as an emergency operation state, and a base station device that is in a normal operation state with respect to another base station device. A notification means for notifying the operation state,
The base station device wirelessly receives information indicating an operation state of another base station device based on the content of the received notification, and receiving means for receiving the notification from the line control device. Wireless transmission means for transmitting,
The mobile station apparatus receives from the base station apparatus information indicating an operating state of another base station apparatus, and converts the base station apparatus in a normal operating state based on the received information to a base in an emergency operating state. A destination control means for giving priority to the station device as a destination, and
A wireless communication system. In a radio communication system having a line control device, a plurality of base station devices connected to the line control device, and a mobile station device that communicates with the base station device by radio,
The base station apparatus detects whether the local station apparatus is in a normal operation state in which communication with the line control apparatus is possible or in an emergency operation state incapable of communication with the line control apparatus; Wireless transmission means for wirelessly transmitting information indicating the operation state of the local station apparatus to the mobile station apparatus,
The mobile station apparatus receives from the base station apparatus information indicating an operation state of the base station apparatus, and a base station apparatus in a normal operation state based on the received information. A transfer destination control means that prioritizes the device and sets the transfer destination,
A wireless communication system. In a base station device connected to a line control device and communicating wirelessly with a mobile station device,
Receiving means for receiving from the line control device a notification of whether the other base station device is in a normal operation state capable of communicating with the line control device or in an emergency operation state incapable of communicating with the line control device; Wireless transmission means for wirelessly transmitting to the mobile station device information indicating an operational state of another base station device based on the content of the notified notification;
A base station apparatus comprising: In a mobile station device that communicates wirelessly with a base station device as a communication partner among a plurality of base station devices connected to a line control device,
Information indicating whether a base station apparatus that is a migration destination candidate is in a normal operation state in which communication with the line control apparatus is possible or in an emergency operation state in which communication with the line control apparatus is impossible A wireless receiving means for receiving wirelessly from the base station apparatus, and a destination control means for preferentially setting the base station apparatus in the normal operation state over the base station apparatus in the emergency operation state based on the received information;
A mobile station apparatus comprising: In the mobile station apparatus of Claim 4,
Output means for outputting to the user information related to the operation state of the base station apparatus that is a candidate for the migration destination based on the received information;
Receiving means for receiving, from the user, information specifying a base station device as a transition destination,
The migration destination control means uses the base station device designated by the received information as the migration destination,
A mobile station apparatus.

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