JP2015095863A - Radio communication system - Google Patents

Abstract

When a fault occurs in a radio control station, a radio mobile station under the fault can recognize the occurrence of the fault in the radio control station.
When a failure that interferes with wireless communication occurs in a wireless control station 30 in a municipality (when a communication failure occurs due to a failure of the wireless control station 30 or the wireless control station 30 becomes unusable) The control station 20 of the prefectural office detects and confirms the failure of the wireless control station 30, and the base station having the wireless control station 30 in which the failure has occurred and the wireless mobile station 40 under its control in the wireless communication area. The station 10 simultaneously notifies that the radio control station 30 is in a fault state (unusable state).
[Selection] Figure 1

Description

  The present invention relates to a radio communication system that performs control communication for a plurality of radio terminals by a radio control station via a base station.

As a type of disaster prevention radio system for municipalities, there is a municipal radio system that allows the prefectural government and municipalities in the prefecture to share a base station for radio communication.
In FIG. 1, as an example of a municipal radio system, a prefectural office control station 20 and a radio mobile station 40a as an example of a radio terminal, a radio control station (also referred to as a radio control table) 30 and radio for each municipality in the prefecture are shown. An outline of a system in which a wireless mobile station 40b, which is an example of a terminal, performs wireless communication by sharing a base station 10 is shown.

That is, in the wireless communication system of the figure, communication between the communication facilities of the prefectural office (communication between the control station 20 and the wireless mobile station 40a and communication between the wireless mobile stations 40a) and communication between the communication facilities in the city A (wireless control). The communication between the station 30 and the wireless mobile station 40b and the communication between the wireless mobile stations 40b), the communication between the communication facilities in the B city, and the communication between the communication facilities in the C city are performed through the common base station 10. ing. Hereinafter, the wireless mobile station 40a of the prefectural office and the wireless mobile station 40b of the municipality are not distinguished, and are simply referred to as the wireless mobile station 40.
Here, the radio communication system of FIG. 1 has a plurality of base stations 10 having different radio communication areas R (with partial area overlap), and each base station 10 has its own radio communication. Wireless communication can be performed with all wireless control stations 30 and wireless mobile stations 40 existing in the area R.

FIG. 2 shows an example of the device configuration of the control station 20, the radio control station 30, and the radio mobile station 40 in the municipalities common radio system of FIG.
The control station 20 controls the control station device 21 provided with input / output devices such as microphones and speakers, a management monitoring control device 22 that provides functions related to the management and monitoring of the municipal radio system, and the control station 20. It has a control station controller 23 that controls and communicates with the base station 10. In addition, external devices such as an extension telephone 24 and a FAX 25 are connected to the control station control device 23 via a relay switch 26.

The wireless control station 30 includes a control base device 31 having input / output devices such as a microphone and a speaker, a control station control device 32 that controls the control station 30 in an integrated manner, and a wireless device that communicates with the base station 10 wirelessly. 33.
The wireless mobile station 40 includes a control device 41 including input / output devices such as a microphone, a speaker, and a display device, and a wireless device 42 that communicates with the base station 10 wirelessly.

Here, the wireless control station 30 is a device having a function similar to a control stand installed in each municipality in the municipal shared wireless system, and is accompanied by a forced disconnection with respect to the wireless mobile station 40 in a call in the same municipality. Simultaneous communication and the like are possible.
In the case of a municipal shared radio system, the control station in the normal disaster prevention radio system corresponds to the control station 20 installed in the control station headquarters of the prefectural disaster prevention radio system. The final control authority is owned by the prefectural control station 20, but in the municipalities, the radio control station 30 is positioned as an independent control function.
The radio control station 30 has various control functions such as control communication with the subordinate radio mobile station 40, but is a kind of mobile station as a device classification. The radio control station 30 can simultaneously transmit a direct wave and a base station wave.

  The main functions supported by the wireless control station 30 will be described. Here, normal communication, simultaneous communication, control communication, dedicated channel communication, communication control, emergency contact, and short message communication will be described. In the following description, the individual communication is communication (one-to-one communication) targeting any one of the radio mobile stations 40, and duplex communication (bidirectional communication) capable of simultaneously transmitting and receiving communication signals. ). The group communication is communication (one-to-n communication) targeting a group composed of a plurality of wireless mobile stations 40, and is a one-way communication that transmits a communication signal to a plurality of wireless mobile stations 40 belonging to the group. is there.

Normal communication includes normal individual communication, which is a type of individual communication, and normal group communication, which is a type of group communication, and can make and receive calls to and from the wireless mobile station 40.
The simultaneous communication includes simultaneous group communication, which is a type of group communication, and transmission to the wireless mobile station 40 is possible. The wireless mobile station 40 that has received simultaneous communication during communication is automatically forcibly disconnected from the current communication and drawn into the simultaneous communication.
Control communication includes control individual communication, which is a type of individual communication, and control group communication, which is a type of group communication, and transmission to the wireless mobile station 40 is possible. The wireless mobile station 40 that has received control communication during communication is automatically forcibly disconnected from the current communication and drawn into control communication.

Dedicated channel communication is communication that uses a specific channel exclusively, and can be activated and canceled by the radio control station 30. Each municipality is allowed to operate one dedicated channel communication.
The communication control is a function for monitoring the call state of the wireless mobile station 40 and forcibly disconnecting the call.
The emergency communication is communication for notifying the radio control station 30 that the radio mobile station 40 wants to make an emergency contact, and can be received by the radio control station 30.
Short message communication is simple fixed message transmission using a control channel.

Various inventions have been proposed so far regarding disaster prevention radio systems for municipalities.
For example, in Patent Document 1, a control station to which a control table is connected, a plurality of base stations coupled to the control station, and a plurality of terminal stations connected to each of the plurality of base stations by digital wireless lines are provided. A regional disaster prevention radio system that operates in at least two types of communication modes: communication that does not involve control by the control table, and communication that is performed under control of the control table. There is provided a control table monitoring control unit for monitoring in the control station, and a wireless control table capable of communicating with at least one base station of the plurality of base stations via the digital wireless line, and the control of the control table is abnormal. An invention is disclosed in which the wireless control table is coupled to the control table via the at least one base station when the wireless control table is detected, and the wireless control table operates in place of the control table. That.

JP 2008-236650 A

FIG. 4 shows a situation when a failure occurs in a radio control station 30 in a certain municipality in the conventional municipal shared radio system. 4 has a configuration in which a pair of approach line devices 15 for wirelessly relaying communication is provided between the base station 10 and the control station 20.
In the conventional municipal radio system, when a failure occurs in the wireless control station 30, the wireless mobile station 40 (a wireless mobile station 40 in the same municipality as the wireless control station 30) under the control of the failure determines the failure of the wireless control station 30. There was no means. For this reason, even if the radio control station 30 that should have the function of the operation center in the radio system of the municipality stops functioning, the radio mobile station 40 of the municipality does not recognize an abnormality and causes inconvenience. Also, the control station 20 of the prefectural office could not detect the failure.

  The present invention has been made in view of the circumstances as described above, and when a failure occurs in a radio control station, the subordinate radio terminal can recognize the occurrence of the failure in the radio control station. With the goal.

In order to achieve the above object, in the present invention, a wireless communication system is configured as follows.
That is, a plurality of wireless terminals, a wireless control station that performs control communication with the plurality of wireless terminals, a base station that wirelessly communicates with the plurality of wireless terminals and the wireless control station, and connected to the base station In the wireless communication system comprising the control station, the control station detects a failure of the wireless control station, and a failure detection unit detects the failure of the wireless control station by the failure detection unit. And a transmission control unit that adds the failure information indicating that the wireless control station is in a failure state to the broadcast information transmitted from the station and transmits the notification information.
Thereby, the wireless terminal that has received the broadcast information transmitted from the base station can recognize that the wireless control station is in a failure state. Moreover, since failure information is transmitted using broadcast information, it is more efficient than transmitting failure information to each wireless terminal individually.

Here, as one configuration example, the radio control station is provided for each group into which the plurality of radio terminals are classified, and the radio terminal indicates that the radio control station of the group to which the terminal belongs is in a failure state. When broadcast information with failure information added is received, a display output based on the failure information may be performed.
Thereby, the user of the wireless terminal that is the target of the control communication by the wireless control station in the fault state can grasp that the radio control station is in the fault state.

Further, as one configuration example, the base station includes a plurality of base stations having different radio communication areas, and the transmission control unit is a radio subject to control communication by a radio control station in which a failure is detected by the failure detection unit. It is good also as a structure which transmits the alerting | reporting information which added the failure information which shows that the said radio | wireless control station is in a failure state from the base station which has a terminal in a wireless communication area.
As a result, even in an environment where there are a plurality of base stations with different wireless communication areas, the wireless terminal subject to controlled communication by the failed wireless control station is notified that the wireless control station is in a failed state. be able to.

Further, as one configuration example, when the base station receives a call to a radio control station in a faulty state from a radio terminal that is subject to control communication by the radio control station, the base station receives the call from another radio control station. Or it is good also as a structure transferred to the said control station.
Thereby, the user of the wireless terminal can contact the person in charge on the control side even if a failure occurs in the wireless control station that performs control communication with the wireless terminal.

  According to the present invention, when a failure occurs in the wireless control station, it is possible for the wireless terminal under its control to recognize the occurrence of the failure in the wireless control station.

It is a figure which shows the example of a schematic structure of a municipalities common use radio system. It is a figure which shows the example of the apparatus structure of each communication equipment in the municipalities common radio system of FIG. It is a figure which shows the example of a structure of the flame | frame which transmits alerting | reporting information. It is a figure explaining the problem of the conventional municipalities common use radio system.

A wireless communication system according to an embodiment of the present invention will be described with reference to the drawings.
In the following, a description will be given by taking as an example a municipal radio system which is a base station shared disaster radio system shown in FIG. 1 and FIG. In addition, the outline | summary and apparatus structure of a municipalities common use radio system are fundamentally the same as what was demonstrated by background art, and the main different parts are demonstrated below.

In the municipal wireless communication system of this example, when a failure that interferes with wireless communication occurs in the wireless control station 30 of the municipality (when a communication failure occurs due to a failure of the wireless control station 30 or the wireless control station 30 The control station 20 of the prefectural office detects and confirms the failure of the wireless control station 30 in the case of being in an unusable state, etc., and the wireless control station 30 in which the failure has occurred and the wireless terminal that is an example of the wireless terminal under its control By the base station 10 having the mobile station 40 in the wireless communication area, the fact that the wireless control station 30 is in a failure state (unusable state) is notified to the wireless mobile stations 40 under the control of the wireless control station 30 where the failure has occurred. By adopting a configuration for notification, operation without function degradation is enabled.
Specifically, the municipalities shared radio system of this example has the following [Function 1] to [Function 3].

  [Function 1] is a function for detecting a system failure (here, the failure state of the radio control station 30), and can be realized by the following methods (1-1) to (1-3). Note that the methods (1-1) to (1-3) may be used alone or in combination.

(1-1) Detection of System Failure Based on Presence of Periodic Location Registration Information Information on the radio control station 30 of each municipality is registered in advance in an operation management device (in this example, the management monitoring control device 22 of the control station 20), Periodic collection and monitoring of the location registration information is performed for the radio control station 30 of each municipality. In other words, the operation management apparatus manages in which radio communication area of the base station 10 the radio control station 30 exists based on the location registration signal periodically transmitted from the radio control station 30. When the location registration of the radio control station 30 is lost (when the location registration signal is interrupted), it is determined that the radio control station 30 is in a fault state.

(1-2) Detection of system failure due to presence / absence of confirmation of orders The control station 20 of the prefectural office periodically issues communication with confirmation of orders such as simultaneous communication to the radio control stations 30 of each municipality. Call. When there is no response to the acceptance confirmation from the wireless control station 30, it is determined that the wireless control station 30 is in a fault state.

(1-3) Detection of System Failure by Alarm Transmission on Another Communication Line Between the base station 10 and the radio control station 30 in the municipality within the radio communication area, communication lines other than disaster prevention radio communication (multiplex radio and Laying digital dedicated lines). Then, when a failure occurs, the wireless control station 30 issues failure information notifying the fact through the communication line laid out above, and from the base station 10 that has received the failure information, the control station of the prefectural office 10 is notified of the failure of the radio control station 30.

  [Function 2] is a function for confirming a failure state. Basically, after the failure is detected by [Function 1], whether or not a failure has occurred is detected by the following methods (2-1) to (2-3). By reconfirming it, it helps to quickly recover the system by avoiding errors in initial response due to misinformation. Note that the methods (2-1) to (2-3) may be used alone or in combination.

(2-1) Confirmation of presence / absence of failure by communication with forced disconnection from control station The control station 20 of the prefectural office automatically communicates with the wireless control station 30 in which the failure state is detected (for example, communication with forced disconnection) , Control individual communication), and if there is no response to this, it is determined that a failure of the radio control station 30 is occurring.

(2-2) Confirmation of presence / absence of failure by normal individual communication from the control station The control station 20 of the prefectural office automatically makes a call to the wireless control station 30 in which the failure state is detected by normal individual communication. . When the telephone call is not being made and there is no response, it is determined that a failure has occurred in the radio control station 30.

(2-3) Confirmation of presence / absence of failure by normal group communication from the control station The control station 20 of the prefectural office is automatically grouped into the “wireless control stand group” to which only the wireless control station 30 in which the failure state is detected belongs. Communicate. Then, when there is no response to the acceptance confirmation or communication is impossible, it is determined that a failure of the radio control station 30 is occurring.

  [Function 3] is a follow function of the wireless mobile station 40 that cannot communicate with the master station (wireless control station 30). When the failure state can be confirmed by [Function 2], the following (3-1) to (3- By executing the processing as shown in 5), the communication of the wireless mobile station 40 belonging to the wireless control station 30 in which the failure state is detected is ensured and backup is performed. In addition, the process of (3-1)-(3-3) may be used independently, and each may be used in combination.

  (3-1) The control station 20 of the prefectural office notifies the base station 10 that has the radio control station 30 in the radio communication area, and activates the number transfer function of the base station 10. Specifically, a notification including information for identifying the radio control station 30 in the fault state is transmitted to the corresponding base station 10. The base station 10 that has activated the number transfer function transfers a call to the control station 20 of the prefectural office using the number transfer function when a call is made from the radio mobile station 40 to the radio control station 30 in the failed state. . Thereby, the wireless mobile station 40 can be connected to the control station 20, and the user of the wireless mobile station 40 can know the failure state of the wireless control station 30 by speaking with the user of the control station 20.

(3-2) The control station 20 of the prefectural office notifies the base station 10 having the radio control station 30 in the wireless communication area in the fault state, and switches the base station 10 to the prefectural support mode. Specifically, information for identifying the radio control station 30 (call transfer source) in a fault state and the radio control station 30 (call transfer destination) that is in a support agreement with the radio control station 30 are identified. A notification including information is transmitted to the corresponding base station 10. When the base station 10 in the prefecture support mode makes a call from the wireless mobile station 40 to the wireless control station 30 in the fault state, the wireless control station in another municipality that has a support agreement with the wireless control station 30. The call is forwarded to 30. As a result, the wireless mobile station 40 can be connected to the wireless control station 30 in another municipality, and the user of the wireless mobile station 40 can know the failure of the wireless control station 30 that has jurisdiction over the mobile station.
It is assumed that information indicating the relationship of the support agreement of the radio control station 30 of each municipality is preset (registered) in the control station 20 of the prefectural office. In addition, the support agreement is concluded between the radio control stations 30 in the municipalities that use the same base station 10.

  (3-3) The base station 10 has transmitted a call to the radio control station 30 in the fault state to the control station 20 of the prefectural office or the radio control station 30 of another municipality ((3-1) or (3- In response to the execution of the process 2), a notification to that effect is transmitted to the caller wireless mobile station 40. Then, the wireless mobile station 40 that has received this notification displays and outputs information indicating that the call to the wireless control station 30 in the failed state has been transferred (for example, “report to proxy wireless control station XX”). , Inform the user.

  (3-4) The control station control device 23 of the control station 20 of the prefectural office indicates that the radio control station 30 is in the fault state in the notification information transmitted from the base station 10 to which the radio control station 30 in the fault state belongs. Add fault information and send. That is, the control station control device 23 holds information indicating which base station the wireless control station 30 belongs to, that is, which base station is used. This information may be location registration information of the wireless control station 30 or may be held separately from the location registration information. The failure information includes, for example, a municipality code for identifying a municipality in which the radio control station 30 is in a failure state, a failure type code indicating a failure type (communication failure, device failure, power failure, etc.), and a failure level indicating a failure level. As shown in FIG. 3 including the level and the like, it is transmitted using an extended area in a frame for transmitting broadcast information.

The broadcast information with the failure information can be received by all the wireless mobile stations 40 existing within the wireless communication range of the base station 10 to which the wireless control station 30 in the failed state belongs. Only the wireless mobile station 40 that has received the broadcast information to which the failure information including the same municipality code as the own station is added (that is, the wireless mobile station 40 in the same municipality as the wireless control station 30 in the failed state). The wireless mobile station 40 that has received the notification information emits a warning sound and waits for information indicating that the wireless mobile station 40 is in a failure state (for example, “wireless control stand failure”) until the failure is recovered. Always display output. In addition, the restoration of the failure is detected by the control station 20 of the prefectural office and is transmitted in the notification information in the same manner as the failure information.
In this example, an example is given in which the range of the municipality of the radio control station 30 in a fault state, that is, the active area of the radio mobile station 40 in the municipality is only the communication area of the base station 10. However, when this system includes a large number of base stations 10 and one municipality is covered by a plurality of base stations 10, the control station control device 23 of the control station 20 is used by the municipality for each radio control station 30. The information of all the base stations 10 is held in association with each other, and the broadcast information is transmitted from all the base stations 10. As a result, the failure state of the wireless control station 30 can be reliably notified to all the wireless mobile stations 40 under the control of the wireless control station 30 in the failure state.

  (3-5) The control station 20 of the prefectural office reports to the radio mobile station 40 in the same municipality as the radio control station 30 in the fault state, “A radio control stand failure is occurring. By transmitting a character message such as “M”, the failure of the wireless control station 30 is made known to the user of the wireless mobile station 40 in the same municipality.

  As described above, by providing the above-mentioned [Function 1] to [Function 3] in the municipal shared radio system, when the radio control station 30 in the municipality is in a failure state, the control station 20 of the prefectural office is the radio control station. 30 failure states are detected and confirmed, and the failure occurrence can be notified to the wireless mobile station 40 under the wireless control station 30 in which the failure has occurred, thereby realizing an operation without functional degradation.

Here, the municipal wireless communication system of this example includes a plurality of wireless mobile stations 40, a wireless control station 30 that performs control communication with the plurality of wireless mobile stations 40, a plurality of wireless mobile stations 40, and a wireless control station 30. A control station 20 connected to the base station 10 and a control station 20 connected to the base station 10. The control station 20 detects a fault of the radio control station 30 and a radio control station using the fault detection function. A transmission control function for transmitting the failure information indicating that the radio control station 30 is in a failure state to the broadcast information transmitted from the base station 10 when 30 failures are detected. It can be grasped as a wireless communication system.
According to such a configuration, the wireless mobile station 40 that has received the broadcast information transmitted from the base station 10 can recognize that the wireless control station 30 is in a failure state. Moreover, since the failure information is transmitted using the broadcast information, it is more efficient than transmitting the failure information to each wireless mobile station 40 individually.

Further, a radio control station 30 is provided for each group into which a plurality of radio mobile stations 40 are classified, and each of the plurality of radio mobile stations 40 indicates that the radio control station 30 of the group to which the terminal belongs is in a failure state. It can also be grasped as a wireless communication system characterized by performing display output based on the failure information when broadcast information to which the failure information shown is added is received.
According to such a configuration, the user of the wireless mobile station 40 that is the target of control communication by the wireless control station 30 in the fault state can grasp that the radio control station 30 is in the fault state.

The transmission control function of the control station 20 includes a plurality of base stations 10 having different radio communication areas, and the transmission control function of the control station 20 wirelessly communicates the wireless mobile station 40 that is subject to control communication by the radio control station 30 in which a fault is detected by the fault detection function It can also be grasped as a wireless communication system characterized by transmitting notification information to which failure information indicating that the wireless control station 40 is in a failure state is transmitted from the base station 10 in the area.
According to such a configuration, even in an environment in which a plurality of base stations 10 having different radio communication areas exist, the radio control station is controlled with respect to the radio mobile station 40 to be controlled by the radio control station 30 in a fault state. It can be notified that 30 is in a failure state.

Further, when the base station 10 receives a call to the radio control station 30 in a faulty state from the radio mobile station 40 that is a target of control communication by the radio control station 30, the base station 10 receives the call from another radio control station 30. Alternatively, it can be grasped as a wireless communication system characterized by being transferred to the control station 20.
According to such a configuration, the user of the wireless mobile station 40 can contact the person in charge on the control side even if a failure occurs in the wireless control station 30 that performs control communication with the wireless mobile station 40. Can do.

  In this example, a radio control station 30 is provided for each municipality, and each radio control station 30 performs control communication for the radio mobile station 40 of the same municipality. It doesn't have to be divided. That is, for example, it may be a group in which wireless mobile stations 40 of several adjacent municipalities are grouped or a group in which the wireless mobile stations 40 are classified for each area where a certain municipality is divided. It suffices if the group 30 performs the control communication with respect to the radio mobile station 40 (that is, the radio control station 30 from which each radio mobile station 40 receives the control communication).

  Further, in this example, only the mobile radio mobile station 40 is shown as the target of control communication by the radio control station 30, but the present invention is not limited to this, and a fixed terminal station or the like that is fixedly installed. Other forms of wireless terminals may be targeted.

  Here, the configuration of the system and apparatus 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 processing according to the present invention, a program for realizing such a method or method, or a storage medium for storing the program. .

  The present invention can be applied to various types of wireless communication systems in which controlled communication by a wireless control station to a plurality of wireless terminals is performed via a base station.

10: base station, 15: approach line device, 20: control station, 30: radio control station, 40 (40a, 40b): radio mobile station,
21: Control stand device, 22: Management monitoring control device, 23: Control station control device, 24: Extension telephone, 25: FAX, 26: Relay exchange,
31: Control stand device, 32: Control station control device, 33: Wireless device,
41: Control device, 42: Wireless device

Claims (4)

A plurality of wireless terminals, a wireless control station that performs control communication with the plurality of wireless terminals, a base station that wirelessly communicates with the plurality of wireless terminals and the wireless control station, and a control station connected to the base station In a wireless communication system comprising:
The control station includes a failure detection unit for detecting a failure of the radio control station, and when the failure of the radio control station is detected by the failure detection unit, the radio control information is transmitted to the broadcast information transmitted from the base station. A transmission control unit that adds and transmits failure information indicating that the station is in a failure state,
A wireless communication system. The radio control station is provided for each group into which the plurality of radio terminals are classified,
When the wireless terminal receives broadcast information to which failure information indicating that the wireless control station of the group to which the terminal belongs belongs is in a failure state, the wireless terminal performs display output based on the failure information.
The wireless communication system according to claim 1. As the base station, comprising a plurality of base stations with different wireless communication areas,
The transmission control unit indicates that the radio control station is in a fault state from a base station having a radio terminal targeted for control communication by the radio control station in which a fault is detected by the fault detection unit in a radio communication area. Sending broadcast information with failure information,
The wireless communication system according to claim 1, wherein the wireless communication system is a wireless communication system. When the base station receives a call to a radio control station in a fault state from a radio terminal subject to control communication by the radio control station, the base station transfers the call to another radio control station or the control station. ,
The wireless communication system according to claim 1, wherein the wireless communication system is a wireless communication system.

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