JP2013021485A - Wireless relay device which relays information according to type of information - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wireless relay device capable of informing, upon receipt of information relayed to a local connection device locally connected to the wireless relay device in a multi-hop manner, a transmitter of the information of a reception notification that the information has been received by the upper-stage wireless relay device.SOLUTION: Another wireless relay device communication section 110 receives data from another wireless relay device via an antenna 111. When an information type determination section 130 determines that the received data is data for a local connection device, the other wireless relay device communication section 110 transmits the received data to a reception notification transmission/relay section 140. The reception notification transmission/relay section 140 transmits data indicating that the data has been normally received to the other wireless relay device via the antenna 111.

Description

  The present invention relates to a radio relay apparatus constituting a radio relay network that relays information in a multi-hop manner between a plurality of radio relay apparatuses.

  A technique related to a multi-hop wireless relay network is known in which a plurality of wireless relay devices with short wireless communication distances are arranged and information is relayed over a wide range by the plurality of wireless relay devices (for example, Patent Document 1).

  However, since the technique described in Patent Document 1 is one-way communication from the upper level to the lower level, and it is not known whether the lower-level wireless relay device has received information normally. If a communication error occurs between the wireless relay devices, and the data does not reach the local connection device connected to the lowermost wireless relay device that is the distribution destination of the target information, the fact May be unrecognizable.

JP 2010-231666 A

  The problem of the present invention is that when information relayed in a multi-hop manner arrives at a locally connected device that is locally connected to the wireless relay device, the upper wireless relay device sends a reception notification indicating that the information has been received. An object of the present invention is to provide a wireless relay device that can be transmitted to the transmission source.

  In order to solve the above-described problem, the present invention provides a wireless relay device that constitutes a wireless relay network that relays information in a multi-hop manner between a plurality of wireless relay devices, and includes information from the first other wireless relay device. And relays the received information to the second other wireless relay device, or receives information from the second other wireless relay device and relays the received information to the first other wireless relay device. Receiving from the first or second other radio relay apparatus, information reception means for transmitting the reception notification to the effect that the distribution information has been received to the first or second other radio relay apparatus An information type determining means for determining the type of the received information, and a local connection device that relays distribution information received from the first or second other wireless relay device to a local connection device locally connected to the own wireless relay device And the information relay means receives the distribution information to which the information identification flag for identifying the type of information is added from the first other radio relay apparatus. The distribution information is relayed to the second other wireless relay device, and the information type determination means reads the information identification flag added to the received distribution information, and the information type of the received distribution information is locally connected to the own wireless relay device. The local connection device relay means is locally connected to the own wireless relay device so that the information type of the received distribution information is received by the information type determination means. If it is determined that the type of information corresponds to the local connection device, the received distribution information is relayed to the local connection device, and the reception notification transmission means is the first When the reception notification that the distribution information is received is transmitted to the wireless relay device, and the information relay means receives the reception notification that the distribution information is received from the second other wireless relay device, the information The relay means relays the received reception notification to the first other wireless relay device.

  ADVANTAGE OF THE INVENTION According to this invention, the radio relay apparatus which can transmit the notification of reception which each radio relay apparatus which relays information in a multihop system has transmitted from the lower stage to the transmission source of the information can be provided. As a result, even for information transmission that does not specify a specific destination that only specifies the information type, it is possible to determine which local connected device among the locally connected devices corresponding to the information type has received the information. The distribution source of the information can be grasped.

It is a whole lineblock diagram showing one example by the present invention. It is a circuit block diagram of the device of the present invention. It is an operation | movement flowchart of this invention apparatus.

The details of the embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is an overall configuration diagram of a relay system according to an embodiment of the apparatus of the present invention. Reference numeral 1 denotes a wireless relay device according to the present invention (hereinafter also abbreviated as this device), and a plurality of wireless relay devices constitute a multi-hop wireless relay network.

  Reference numeral 2 denotes various local connection devices locally connected to the apparatus 1, 2-9 a speaker locally connected to the apparatus 1-9, and 2-10 a monitor locally connected to the apparatus 1-10. A camera 2-11 is a display device locally connected to the apparatus 1-11.

  Reference numeral 3 denotes a gateway connected to various data distribution sources or various data collection centers 5. As the various centers 5, an emergency information center 5-1, which distributes or collects emergency information, information related to events, advertisements, and the like is distributed. An information center 5-2 and a meter reading center 5-3 for collecting data related to the usage amount of electricity, gas, water and the like are shown.

  Reference numeral 4 denotes a meter-reading device such as electricity, gas, and water installed in each door, which is a local connection device locally connected to the device 1. The meter-reading devices 4-4 to 4-6 are locally connected to the devices 1-4 to 1-6, and the meter-reading data from each meter-reading device 4 is relayed to the meter-reading center 5-3 in a multi-hop manner. . Information such as notification from the meter reading center is relayed to each meter reading device 4 in a multi-hop manner.

  Each of the wireless relay apparatuses 1-1 to 1-11 is distributed in a predetermined management unit area (for example, a municipality) at an interval that is less than or equal to a wireless radio wave reach (for example, 100 m). It relays data between adjacent wireless relay devices.

  For example, data from the emergency information center 5-1 is sent to the center via the radio relay apparatuses 1-1, 1-2, 1-3,..., 1-9, 1-10, 1-11. It is transmitted in the direction of To End (downward). Of the data from the emergency information center 5-1, the emergency call voice (for example, tsunami occurrence) is played out loudly from the speaker 2-9 installed on the street via the wireless relay device 1-9. Similarly, emergency call information composed of video and characters is displayed on a large display device 2-11 installed on the street via the wireless relay device 1-11.

  Further, the video and audio from the monitor camera 2-10 pass through the wireless relay devices 1-10, 1-9, 1-8,..., 1-1, and the direction of End to Center (upward) To the emergency information center 5-1 via the wireless relay device 1-1.

  Here, for example, the monitor camera 2-10 may be constantly operating, or may be activated by remote control from the emergency information center 5-1 when an abnormality occurs.

  FIG. 2 is a block diagram of the apparatus 1, in which 110 is another wireless relay device communication unit that wirelessly communicates with another adjacent wireless relay device, 111 is an antenna, 120 is its own wireless relay device, and another wireless relay device. Alternatively, a data relay control unit that performs relay control of data with a local connection device, 130 an information type determination unit that determines the type of information received from another wireless relay device, and 140 a distribution information to another wireless relay device in the previous stage A reception notification transmission / relay unit 150 for transmitting or relaying a reception notification to the effect of reception, 150 is a local connection device relay unit. Reference numeral 161 denotes a local connection line that connects the local connection device and the apparatus 1.

  Here, the other radio relay apparatus communication unit 110 receives data from the other radio relay apparatus via the antenna 111 and sends the data to the data relay control unit 120. The data relay control unit 120 performs data relay control between the reception notification transmission / relay unit 140 and the locally connected device relay unit 150. The information type determination unit 130 receives data from the data relay control unit 120 and determines whether the data is for the local connection device. The reception notification transmission / relay unit 140 sends a reception notification indicating that the data has been normally received from the antenna 111 to the other wireless relay device via the data relay control unit 120 and the other wireless relay device communication unit 110. It also relays reception notifications received from other wireless relay devices.

  When the information type determination unit 130 determines that the data is the data for the local connection device, the local connection device relay unit 150 transmits the data to the local connection devices 2, 3, 4, via the local connection line 161.

  FIG. 3 is an operation flowchart of the apparatus 1. Hereinafter, the operation flow of the apparatus 1 will be described with reference to FIG.

  This flow starts when the power of the device 1 is turned on (S300), and the other wireless relay device communication unit 110 receives from another adjacent wireless relay device communication unit or another relay device locally connected to the own wireless relay device. Data reception is monitored (S310).

  When data is received (S310, YES), the data relay control unit 120 is a data type for a locally connected device (hereinafter abbreviated as “locally connected device”) locally connected to the own wireless relay device from the received data. Is read, and it is determined whether or not the received data is for the local connection device (S320), and if it is determined that the received data is not for the local connection device. (S320, NO), the data is transferred to the other wireless relay device in the subsequent stage (S350), and the process returns to the standby state.

  When the received data is data for the local connection device (S320, YES), the data is transferred to the local connection device (S330), and a reception notification is transmitted to the other wireless relay device in the previous stage ( S340). Thereafter, the data is transferred to the subsequent wireless relay device (S350).

DESCRIPTION OF SYMBOLS 1 ... Wireless relay apparatus 2 ... Various local connection apparatus 3 ... Gateway 4 connected with various centers ... Meter-reading apparatus 5 ... Various centers 110 ... Other wireless relay apparatus communication part 111 ... Antenna 120 ... Data relay control unit 130 ... Information type determination unit 140 ... Reception notification transmission / relay unit 150 ... Local connection device relay unit 161 ... Local connection line

Claims (1)

A wireless relay device constituting a wireless relay network that relays information in a multi-hop manner between a plurality of wireless relay devices,
Receive information from the first other radio relay apparatus and relay the received information to the second other radio relay apparatus, or receive information from the second other radio relay apparatus and transfer the received information to the first Information relay means for relaying to one other radio relay apparatus, reception notification transmitting means for transmitting a reception notification indicating that the distribution information has been received to the first or second other radio relay apparatus, and the first or second Information type determination means for determining the type of information received from two other wireless relay devices, and locally connected equipment locally connected to the distribution information received from the first or second other wireless relay device. A locally connected device relay means for relaying to
When the information relay unit receives the distribution information to which the information identification flag for identifying the type of information is added from the first other wireless relay device, the information relay unit transmits the received distribution information to the second other wireless relay device. Relay to a wireless relay device, the information type determination means reads an information identification flag added to the received distribution information, and the information type of the received distribution information corresponds to a locally connected device locally connected to the own wireless relay device The local connection device relay means corresponds to the local connection device in which the information type of the distribution information received by the information type determination means is locally connected to the own wireless relay device. If it is determined that the type of information is received, the received distribution information is relayed to the locally connected device, and the reception notification transmission means is forwarded to the first other wireless relay device. To send an acknowledgment to the effect that has received the delivery information,
When the information relay unit receives a reception notification indicating that the distribution information has been received from the second other wireless relay device, the information relay unit sends the received reception notification to the first other wireless relay device. A wireless relay device that relays information according to an information type, characterized by relaying.

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