JP2006186565A - Radio device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a radio device forming an autonomously established radio network for performing a plurality of radio communications while suppressing deterioration of throughput. <P>SOLUTION: Each of the radio devices 1-15 holds a routing table indicating the absolute position of the other radio devices with respect to its own device. When radio communication is performed in a path among the radio devices 1-6-9-11, if the radio device 9 receives a request of radio communication with the radio device 10 from the radio device 8, the radio device 9 executes one of radio communication for transmitting data having higher priority, and notifies the transmission source of the other radio communication having lower priority about information of all the radio devices involved in the one radio communication. The transmission source of the other radio communication excludes all the radio devices involved in the one radio communication, and establishes a path for performing the other radio communication on the basis of the routing table. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a radio apparatus, and more particularly to a radio apparatus constituting an ad hoc network that is autonomously and instantaneously constructed by a plurality of radio apparatuses.

  An ad hoc network is a network that is autonomously and instantaneously constructed by a plurality of wireless devices communicating with each other. In an ad hoc network, when two wireless devices that communicate with each other do not exist in the communication area, a wireless device located between the two wireless devices functions as a router and relays a data packet. Can be formed.

  Such an ad hoc network is about to be applied to various fields such as a wireless communication network in a stricken area and streaming in ITS (Intelligent Transport Systems) inter-vehicle communication (Non-Patent Document 1).

  Dynamic routing protocols that support multi-hop communication include table-driven protocols and on-demand protocols. The table-driven protocol periodically exchanges control information related to a route and constructs a route table in advance, and includes GSR (Global State Routing), FSR (Fish-eye State Routing), OLSR (Optimized Link). State Routing) and DSDV (Destination Sequential Distance Vector) are known.

  In addition, the on-demand protocol is a method for constructing a route to a destination for the first time when a data transmission request occurs, and includes DSR (Dynamic Source Routing) and AODV (Ad Hoc On-Demand Distance Vector Routing). Are known.

In a conventional ad hoc network, when data communication is performed from a transmission source to a transmission destination, a communication path is determined so that the number of hops from the transmission source to the transmission destination is as small as possible (Non-Patent Document 2).
Masahiro Watanabe “Wireless Ad Hoc Network”, Automobile Engineering Society Spring Meeting Humantronics Forum, pp 18-23, Yokohama, May 2003. Guangyu Pei, at al, “Fisheye state routing: a routing scheme for ad hoc wireless networks”, ICC2000. Commun., Volume 1, pp70-74, LA, June 2000.

  However, in the conventional ad hoc network, when the first wireless communication is performed between the first transmission source and the first transmission destination, the second transmission source and the second transmission destination When the request for performing the second wireless device is transmitted to the wireless device performing the first wireless communication, the first and second wireless communication are not coordinated with each other, and the second transmission Originally, the second wireless communication could not be executed. As a result, there is a problem that the throughput of the entire ad hoc network is lowered.

  Therefore, the present invention has been made to solve such a problem, and an object of the present invention is to establish a wireless network that is constructed autonomously and that performs a plurality of wireless communications while suppressing a decrease in throughput. Is to provide a device.

  According to the present invention, the wireless device is a wireless device that is autonomously established and constitutes a wireless network in which wireless communication is performed between a transmission source and a transmission destination, and is configured to communicate with a position information storage unit. Means and a notification means. The position information storage means stores absolute position information indicating the absolute position of other wireless devices constituting the wireless network with respect to the wireless device. The communication means performs second wireless communication from the second transmission source to the second transmission destination when the first wireless communication is performed between the first transmission source and the first transmission destination. When requested, one of the first and second wireless communications is performed based on the absolute position information. The notifying means extracts information on all wireless devices performing one wireless communication based on the absolute position information, and the extracted information on all wireless devices is one of the first and second wireless communication. The other wireless communication source is notified.

  Preferably, the wireless device further includes selection means. When there is a request for the second wireless communication, the selection unit has a priority between the first data transmitted in the first wireless communication and the second data transmitted in the second wireless communication. The wireless communication through which high data is transmitted is selected as one wireless communication. Then, the communication means performs wireless communication selected by the selection means based on the absolute position information. In addition, the notifying means receives the selection result by the selecting means and notifies the information on all the wireless apparatuses performing one wireless apparatus to the transmission source of the other wireless communication.

  According to the present invention, the wireless device is a wireless device that is autonomously established and constitutes a wireless network in which wireless communication is performed between a transmission source and a transmission destination, and includes a position information storage unit and , Communication means and notification means. The position information storage means stores absolute position information indicating the absolute position of other wireless devices constituting the wireless network with respect to the wireless device. The communication means performs second wireless communication from the second transmission source to the second transmission destination when the first wireless communication is performed between the first transmission source and the first transmission destination. When requested, one of the first and second wireless communications is performed based on the absolute position information. The notifying means extracts route information for performing wireless communication of one of the first and second wireless communication based on the absolute position information, and sends the extracted route information to the transmission source of the other wireless communication. Notice.

  Preferably, the communication unit is configured to perform one wireless communication via a path having a communication distance other than a specific communication distance that leads to the interruption of the wireless communication between the wireless device and the adjacent wireless device based on the absolute position information. To do.

  Preferably, the communication means includes first and second communication means. The first communication means communicates at a first frequency with a first wireless device adjacent to the wireless device in the direction of one wireless communication transmission source. The second communication means communicates with a second wireless device adjacent to the wireless device at a second frequency different from the first frequency in the direction of one wireless communication transmission destination.

  Furthermore, according to the present invention, the wireless device is a wireless device that is autonomously established and constitutes a wireless network in which wireless communication is performed between a transmission source and a transmission destination, and the position information storage means , Communication request means, route determination means, and communication means. The position information storage means stores absolute position information indicating the absolute position of other wireless devices constituting the wireless network with respect to the wireless device. Based on the absolute position information, the communication request means determines a first route for performing wireless communication between the wireless device and the transmission destination, and performs wireless communication along the determined first route. A communication request is transmitted to the transmission destination. The route determination means, after transmitting the communication request, sends a first notification informing that the wireless communication is prohibited and a second notification informing all the wireless devices involved in the wireless communication already performed in the second route. When receiving from the wireless device on the second route, based on the absolute position information, the third route for performing wireless communication up to the transmission destination while avoiding all the wireless devices specified by the second notification. decide. The communication means performs wireless communication with the transmission destination along the third route determined by the route determination means.

  Preferably, the route determination unit selects a third route by selecting a route whose communication distance between adjacent wireless devices is a communication distance other than a specific communication distance that leads to the interruption of the wireless communication based on the absolute position information. decide.

  Preferably, the wireless device further includes frequency generation means. The frequency generation means generates frequency setting information for setting a frequency used by all the wireless devices constituting the third path. The communication means transmits the frequency setting information to all the wireless devices constituting the third path. The frequency setting information is information that is set so that the first frequency used in the data transmission and the second frequency used in the data reception are different from each other in all the wireless devices constituting the third path. It is.

  In the wireless device according to the present invention, when there is a request for the second wireless communication while the first wireless communication is being performed, one of the first and second wireless communication is performed. Information of all wireless devices performing one wireless communication is transmitted to the transmission source of the other wireless communication. Then, the transmission source of the other wireless communication excludes the wireless device performing one wireless communication, determines a route for performing the other wireless communication based on the absolute position information, and performs the other wireless communication. As a result, a plurality of wireless communications can be performed simultaneously in the wireless network.

  Therefore, according to the present invention, the throughput in the wireless network can be improved.

  In the wireless device according to the present invention, when there is a request for the second wireless communication while the first wireless communication is being performed, one of the first and second wireless communication is performed. The route information for performing the other wireless communication is extracted based on the absolute position information and transmitted to the transmission source of the other wireless communication. Then, the transmission source of the other wireless communication performs the other wireless communication according to the transmitted route information. As a result, a plurality of routes for performing a plurality of wireless communications in a wireless network can be quickly established, and a plurality of wireless communications can be performed simultaneously.

  Therefore, according to the present invention, the throughput in the wireless network can be improved.

  Furthermore, in the wireless device according to the present invention, after a request for performing wireless communication with the transmission destination is transmitted, a notification notifying the prohibition of wireless communication requested from the wireless device involved in the wireless communication already performed. When information on all the wireless devices involved in the wireless communication that has already been performed is received, a route for performing wireless communication with the transmission destination is established, excluding all the wireless devices, and the wireless communication Is done.

  Therefore, according to the present invention, the throughput in the wireless network can be improved.

  Embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof will not be repeated.

  FIG. 1 is a schematic diagram of a radio network system according to an embodiment of the present invention. The wireless network system 100 includes wireless devices 1-15. The wireless devices 1 to 15 are arranged in a wireless communication space and autonomously configure a network. When transmitting data from the wireless device 1 to the wireless device 11, the wireless devices 2 to 10 and 12 to 15 relay the data from the wireless device 1 and deliver it to the wireless device 11.

  In this case, the wireless device 1 can perform wireless communication with the wireless device 11 through various routes. That is, the wireless device 1 can perform wireless communication with the wireless device 11 through the wireless devices 3, 4, 7, and 8, and can communicate with the wireless device 11 through the wireless devices 2, 5, and 8. Wireless communication can be performed, and wireless communication can be performed with the wireless device 11 via the wireless devices 6 and 9.

  When wireless communication is performed via the wireless devices 6 and 9, the hop count is the smallest “3”, and when wireless communication is performed via the wireless devices 2, 5, and 8, the hop count is “4” and the wireless communication is performed. When wireless communication is performed via the devices 3, 4, 7, and 8, the number of hops is the largest, “5”.

  Therefore, when a route for performing wireless communication via the wireless devices 6 and 9 is selected, the number of hops is minimized to “3”.

  In this case, for example, wireless communication is performed between the wireless device 1 and the wireless device 11 via the route of the wireless device 1 -the wireless device 6 -the wireless device 9 -the wireless device 11 having the smallest number of hops.

  However, when wireless communication is performed between the wireless device 1 and the wireless device 11 via the route of the wireless device 1 -the wireless device 6 -the wireless device 9 -the wireless device 11, the wireless device 8 and the wireless device 10. Are transmitted from the wireless device 8 to the wireless device 9, the wireless device 9 transmits the wireless communication from the wireless device 1 to the wireless device 11, and the wireless device 8 transmits to the wireless device 10. If the wireless communication to the wireless device 8 is not adjusted, the wireless device 8 cannot perform wireless communication with the wireless device 10. As a result, the overall throughput of the wireless network system 100 decreases.

  In the following, a method for performing a plurality of wireless communications while suppressing a decrease in throughput in the wireless network system 100 will be described.

  Note that the FSR protocol is basically used as a protocol for establishing a communication path between a transmission source and a transmission destination. This FSR protocol is a table-driven routing protocol, and exchanges route information with a relatively close wireless device and exchanges route information with a distant wireless device. It is a protocol that reduces the traffic load by reducing.

[Embodiment 1]
FIG. 2 is a schematic block diagram showing a configuration of the wireless device 1 shown in FIG. 1 in the first embodiment. The wireless device 1 includes an antenna 11A, an input unit 12A, a display unit 13A, an e-mail application 14A, and a communication control unit 15A.

  The antenna 11A is an antenna whose antenna characteristics can be switched between directivity and omnidirectionality. The antenna 11A receives data from another wireless device via the wireless communication space, outputs the received data to the communication control unit 15A, and transmits the data from the communication control unit 15A via the wireless communication space. Send to other wireless device.

  The input unit 12A receives a message and data destination input by the operator of the wireless device 1, and outputs the received message and destination to the electronic mail application 14A. The display unit 13A displays a message in accordance with control from the electronic mail application 14A.

  The e-mail application 14A generates data based on the message and destination from the input unit 12A and outputs the data to the communication control unit 15A.

  The communication control unit 15A includes a plurality of modules that perform communication control according to an ARPA (Advanced Research Projects Agency) Internet hierarchical structure. That is, the communication control unit 15A includes a wireless interface module 16, a MAC (Media Access Control) module 17, an LLC (Logical Link Control) module 18, an IP (Internet Protocol) module 19, a routing table 20, and a TCP module. 21, a UDP module 22, an SMTP (Simple Mail Transfer Protocol) module 23, and a routing daemon 24.

  The wireless interface module 16 belongs to the physical layer, modulates / demodulates a transmission signal or a reception signal according to a predetermined rule, and transmits / receives a signal via the antenna 11A at the frequencies fx, fy selected by the IP module 19. In this case, the wireless interface module 16 receives a signal at a frequency fy different from the frequency fx from the other adjacent wireless device while transmitting a signal at the frequency fx to the adjacent wireless device, and also transmits one adjacent wireless device. While receiving a signal at the frequency fx from the device, the signal is transmitted at the frequency fy to the other adjacent wireless device. That is, the wireless interface module 16 communicates simultaneously with two wireless devices at different frequencies.

  Further, the wireless interface module 16 measures the distance and azimuth between two adjacent wireless devices by a method described later, and transmits the measured distance and azimuth to the routing daemon 24.

  Further, the wireless interface module 16 detects the received signal strength when a signal is received from an adjacent wireless device and outputs the detected signal strength to the routing daemon 24.

  The MAC module 17 belongs to the MAC layer, executes the MAC protocol, and executes various functions described below.

  That is, when the MAC module 17 transmits the route information in the wireless network system 100 to another wireless device, the MAC module 17 creates the link state packet LSP by inserting the information related to the adjacent wireless device into the body part. Broadcast through.

  Further, when wireless communication is performed between the transmission source and the transmission destination, the MAC module 17 has the IP packet from the IP module 19 and the frequency setting information FQIF1 indicating the frequency used by each wireless device in the wireless network system 100 in the body. The data frame DAFM is created by inserting into the part and transmitted via the wireless interface module 16.

  Further, the MAC module 17 performs retransmission control of data (packets). The MAC module 17 detects that the link has been disconnected when the number of retransmissions of data (packets) exceeds a predetermined value, and notifies the routing daemon 24 that the link has been disconnected.

  The LLC module 18 belongs to the data link layer and executes the LLC protocol to connect and release a link with an adjacent wireless device.

  The IP module 19 belongs to the Internet layer and generates an IP packet. The IP packet includes an IP header and an IP data portion for storing a packet of a higher protocol. When the IP module 19 receives data from the TCP module 21, the IP module 19 stores the received data in the IP data portion and generates an IP packet. Then, the IP module 19 searches the routing table 20 according to the FSR-MS protocol, which is a table-driven routing protocol, and determines a route for transmitting the generated IP packet. Then, the IP module 19 transmits the IP packet to the LLC module 18 and transmits the IP packet to the transmission destination along the determined path. The FSR-MS protocol is a protocol based on the FSR protocol. As will be described later, the FSR-MS protocol determines a path between a transmission source and a transmission destination by placing a weight on a communication distance with an adjacent wireless device. It is.

  Furthermore, when the wireless device 1 is the transmission source, the IP module 19 uses the frequency setting information FQIF1 indicating the frequency used by the wireless device that relays wireless communication between the transmission source, the transmission destination, and the transmission source and the transmission destination. It is generated and transmitted to the MAC module 17 via the LLC module 18.

  Further, the IP module 19 generates a frequency selection signal FQSL1 for selecting the frequency fx, a frequency selection signal FQSL2 for selecting the frequency fy, and frequency switching signals FQEX1 and FQEX2 for changing the frequency through which the signal passes. Then, the generated frequency selection signals FQSL1 and FQSL2 and the frequency switching signals FQEX1 and FGEX2 are output to the wireless interface module 16.

  The routing table 20 belongs to the Internet layer and includes x and y coordinates indicating the absolute positions of a plurality of wireless devices with respect to a certain wireless device, as will be described later.

  The TCP module 21 belongs to the transport layer and generates a TCP packet. The TCP packet is composed of a TCP header and a TCP data part for storing data of an upper protocol. Then, the TCP module 21 transmits the generated TCP packet to the IP module 19.

  The UDP module 22 belongs to the transport layer, and stores information related to adjacent wireless devices extracted by the routing daemon 24 in the body portion to create a link state packet LSP. The link state packet LSP broadcast from other wireless devices is received and output to the routing daemon 24 while being transmitted to the module 17.

  The SMTP module 23 belongs to the process / application layer, and secures a full-duplex communication channel and exchanges messages based on data received from the electronic mail application 14A.

  The routing daemon 24 belongs to the process / application layer, monitors the execution state of other communication control modules, and processes requests from other communication control modules. In addition, the routing daemon 24 periodically exchanges route information with other wireless devices existing relatively close according to the FSR-MS protocol, and the obtained route information and the received signal strength and distance received from the wireless interface module 16 Based on the azimuth and the azimuth angle, a routing table 20 composed of absolute position information indicating the absolute positions of the wireless devices 2 to 15 with respect to the wireless device 1 is dynamically created in the Internet layer by a method described later.

  Further, the routing daemon 24 generates a signal DIR instructing measurement of the azimuth angle and transmits the signal DIR to the wireless interface module 16, and in the measurement of the azimuth angle, the signal RQ (received by the wireless interface module 16 from another wireless device). When a signal for requesting measurement of the azimuth is received from the wireless interface module 16, data DADR for measuring the azimuth is generated and transmitted to the wireless interface module 16.

  Note that each of the wireless devices 2 to 15 illustrated in FIG. 1 has the same configuration as the configuration of the wireless device 1 illustrated in FIG. 2.

  FIG. 3 is a schematic block diagram showing the configuration of the wireless interface module 16 shown in FIG. 2 in the first embodiment. The wireless interface module 16 includes communication units 161 and 162, a distance measurement unit 163, and an azimuth angle measurement unit 164. When wireless communication is performed between the wireless device 1 and the wireless device 11 illustrated in FIG. 1, the communication unit 161 of the wireless devices 6 and 9 that are repeaters is a wireless device that exists on the wireless device 1 side that is a transmission source. The communication unit 162 performs wireless communication at a frequency fy with a wireless device existing on the wireless device 11 side that is a transmission destination. When wireless communication is performed between the wireless device 1 and the wireless device 11, the communication unit 162 of the wireless device 1 that is the transmission source performs wireless communication with the wireless device 6 at the frequency fy, and the wireless device that is the transmission destination. The communication unit 161 of the device 11 performs wireless communication with the wireless device 9 at the frequency fx.

  That is, the communication units 161 and 162 simultaneously perform wireless communication with two different wireless devices at different frequencies.

  The distance measuring unit 163 measures a communication distance between two adjacent wireless devices by a method described later, and transmits the measured communication distance to the routing daemon 24.

  The azimuth angle measurement unit 164 measures the azimuth angle of the other wireless device with respect to one wireless device between two adjacent wireless devices by a method described later, and transmits the measured azimuth angle to the routing daemon 24.

  FIG. 4 is a schematic block diagram showing the configuration of the communication units 161 and 162 shown in FIG. 4, (a) of FIG. 4 shows the configuration of the communication unit 161, and (b) of FIG. 4 shows the configuration of the communication unit 162.

  The communication unit 161 includes a transmission / reception unit 1611, a channel unit 1612, and a band pass filter (BPF: Band Pass Filter) 1613. The transmission / reception unit 1611 receives the frequency selection signal FQSL1 for selecting the frequency fx from the IP module 19, and receives the link state packet LSP and the data frame DAFM from the MAC module 17 which is an upper layer. Then, the transmission / reception unit 1611 modulates the link state packet LSP or the data frame DAFM with the frequency fx designated by the frequency selection signal FQSL1. Further, the transmission / reception unit 1611 selects a channel having the same frequency as the frequency fx designated by the frequency selection signal FQSL1 from the 14 channels of the channel unit 1612. Then, the transmission / reception unit 1611 outputs the modulated link state packet LSP or the data frame DAFM to the BPF 1613 via the selected channel.

  Also, the transmission / reception unit 1611 demodulates the signal received via the channel unit 1612 and outputs the demodulated signal to the upper layer.

  The channel unit 1612 includes channels Ch1 to Ch14. Channels Ch1 to Ch14 exchange signals having frequencies f1 to f14 between the transmission / reception unit 1611 and the BPF 1613, respectively.

  The BPF 1613 receives from the IP module 19 a frequency switching signal FQEX1 and a frequency selection signal FQSL1 for changing the frequency through which the signal passes. When the BPF 1613 receives the frequency switching signal FQEX1, the BPF 1613 receives the signal from the antenna 11A while changing the frequency in the range of the frequencies f1 to f14, and if the changed frequency matches the frequency of the signal, A signal from the antenna 11A is output to the transmission / reception unit 1611 via a channel (any one of the channels Ch1 to Ch14) having the same frequency as the matched frequency.

  Further, when the BPF 1613 receives the frequency selection signal FQSL1 from the IP module 19, the BPF 1613 exchanges a signal of the frequency fx designated by the frequency selection signal FQSL1 between the channel unit 1612 and the antenna 11A.

  The communication unit 162 includes a transmission / reception unit 1621, a channel unit 1622, and a BPF 1623. The transceiver 1621 receives the frequency selection signal FQSL2 from the IP module 19, and the BPF 1623 receives the frequency switching signal FQEX2 and the frequency selection signal FQSL2 from the IP module 19. The channel unit 1622 has the same configuration as the channel unit 1612, and the transmission / reception unit 1621 and the BPF 1623 perform the same functions as the transmission / reception unit 1611 and the BPF 1613 of the communication unit 161, respectively. Therefore, the frequency selection signal FQSL1 and the frequency switching signal FQEX1 in the description of the communication unit 161 may be read as the frequency selection signal FQSL2 and the frequency switching signal FQEX2, respectively.

  FIG. 5 is a first schematic block diagram showing the configuration of the distance measuring unit 163 shown in FIG. FIG. 6 is a second schematic block diagram showing the configuration of the distance measuring unit 163 shown in FIG.

  The schematic block diagram shown in FIG. 5 is a schematic block diagram of the distance measuring unit 163 when the wireless device on which the distance measuring unit 163 is mounted is a transmitter, and the schematic block diagram shown in FIG. It is a schematic block diagram of the distance measurement part 163 in case the radio | wireless apparatus by which is mounted is a receiver.

  Therefore, in the following, the distance measuring unit 163 of the transmitter is referred to as a distance measuring unit 163A, and the distance measuring unit 163 of the receiver is referred to as a distance measuring unit 163B.

  Referring to FIG. 5, distance measurement unit 163A includes an input terminal 1631, amplifiers 1632 and 1635, BPFs 1633 and 1636, a modulator 1634, a power amplifier 1637, a reference oscillator 1638, a power distributor 1639, PLL oscillators 1640 and 1642, a power combiner 1641, and a control unit 1643 are included.

  The input terminal 1631 receives a signal wave from the MAC module 17 and outputs the received signal wave to the amplifier 1632. The amplifier 1632 amplifies the signal wave input from the input terminal 1631. The BPF 1633 passes a component of a predetermined frequency band of the signal wave amplified by the amplifier 1632.

  The reference oscillator 1638 generates a reference signal of 10 MHz, for example. The power distributor 1639 distributes the reference signal to the PLL oscillators 1640 and 1642. The PLL oscillator 1640 outputs a first carrier wave having a frequency fm by multiplying the reference signal generated by the reference oscillator 1638. The PLL oscillator 1642 multiplies the reference signal generated by the reference oscillator 1638 to output a second carrier wave having the frequency fn.

  The control unit 1643 includes, for example, a CPU (Central Processing Unit), and controls the frequency fn of the second carrier wave output from the PLL oscillator 1642. In the present invention, the frequency fm of the first carrier wave output from the PLL oscillator 1640 is, for example, 100 MHz, and the frequency fn of the second carrier wave output from the PLL oscillator 1642 is, for example, 100 MHz to (100 + k−). 1) Controlled to MHz. Note that k is an integer of 2 or more.

  Power combiner 1641 combines the first carrier generated by PLL oscillator 1640 and the second carrier generated by PLL oscillator 1642 and provides the combined first and second carriers to modulator 1634. .

  Modulator 1634 modulates the first and second carrier waves supplied from power combiner 1641 with the signal wave output from BPF 1633, and outputs a modulated wave. Here, the modulation method by the modulator 1634 is not particularly limited. Various digital modulation methods or analog modulation methods such as a GFSK (Gaussian frequency shift keying) method and an OFDM (Orthogonal Frequency Division Multiplexing) method can be used.

  The amplifier 1635 amplifies the modulated wave output from the modulator 1634. The BPF 1636 passes a component in a predetermined frequency band of the modulated wave amplified by the amplifier 1635 in order to remove unnecessary radiation. The power amplifier 1637 amplifies the modulated wave output from the BPF 1636 and transmits it as a radio wave from the antenna 11A. The frequency of the radio wave is, for example, about 2.5 GHz, but is not limited to this.

  In this way, two modulated waves having different frequencies are transmitted from the distance measuring unit 163A shown in FIG. In this case, the frequency difference between the two modulated waves is variable.

  Referring to FIG. 6, distance measurement unit 163B includes low noise amplifier 1644, BPF 1645, demodulator 1646, PLL oscillator 1647, amplifiers 1648, 1661, 1663, power distributor 1649, and BPFs 1651 to 165k. , Phase detector 1660, processing unit 1662, and filter 1664.

  The low noise amplifier 1644 is connected to the antenna 11A and amplifies the modulated wave received by the antenna 11A. The BPF 1645 allows a component in a predetermined frequency band of the modulated wave amplified by the low noise amplifier 1644 to remove unnecessary signals from the outside.

  The PLL oscillator 1647 generates a predetermined reference signal. The demodulator 1646 down-converts the modulated wave output from the BPF 1645 using the reference signal generated by the PLL oscillator 1647, demodulates the modulated wave, outputs the signal wave to the amplifier 1663, and has a frequency fm. A first carrier and a second carrier having frequency fn are output to amplifier 1648.

  The amplifier 1663 amplifies the signal wave output from the demodulator 1646 and outputs it through the filter 1664. The amplifier 1648 amplifies the first and second carrier waves demodulated by the demodulator 1646. The power distributor 1649 distributes the first and second carrier waves amplified by the amplifier 1648 to the BPFs 1651 to 165k. The BPF 1651 passes the first carrier wave having the frequency fm among the carrier waves given by the power distributor 1649. In addition, any one of the BPFs 1652 to 165k passes the second carrier having the frequency fn among the carriers provided by the power distributor 1649.

  In the present invention, for example, the BPF 1651 passes a carrier of 100 MHz, and the BPFs 1652 to 165 k pass a carrier of 101 MHz to (100 + k−1) MHz, respectively.

  The phase detector 1660 detects the phase difference between the first carrier wave output from the BPF 1651 and the second carrier wave output from any of the BPFs 1652 to 165k, and outputs a DC voltage signal corresponding to the phase difference. .

  The amplifier 1661 amplifies the voltage signal output from the phase detector 1660. The processing unit 1662 includes an analog-digital converter, a CPU, a memory, and the like, and calculates a distance between two adjacent wireless devices based on the phase difference by a method described later.

  FIG. 7 is a schematic block diagram showing the configuration of the azimuth measuring unit 164 shown in FIG. The azimuth measuring unit 164 includes a control unit 1671, a transmission / reception unit 1672, a directivity control unit 1673, and an azimuth angle detection unit 1673.

  When the control unit 1671 receives the signal DIR instructing the measurement of the azimuth angle from the routing daemon 24, the control unit 1671 generates a signal RQ for requesting the other radio apparatus to measure the azimuth angle and outputs the signal RQ to the transmission / reception unit 1672. After antenna 11A transmits signal RQ, signal EXDR for instructing to sequentially switch the directivity of antenna 11A is generated and output to directivity control unit 1673.

  In addition, when the control unit 1671 receives the signal RQ from the transmission / reception unit 1672, the control unit 1671 transmits the received signal RQ to the routing daemon 24.

  When receiving the signal RQ from the control unit 1671, the transmission / reception unit 1672 modulates and amplifies the received signal RQ and transmits the signal RQ via the antenna 11A. Further, when receiving data DADR for measuring the azimuth angle from the upper layer such as the MAC module 17 or the like, the transmission / reception unit 1672 modulates and amplifies the received data DADR and transmits the data via the antenna 11A. Furthermore, when the signal RQ is received from another wireless device via the antenna 11A, the transmission / reception unit 1672 demodulates and amplifies the received signal RQ and outputs the signal RQ to the control unit 1671. Further, when the data DADR is received from another wireless device via the antenna 11A, the transmission / reception unit 1672 demodulates and amplifies the received data DADR, detects the received signal strength RSSI of the data DADR, and the azimuth angle detection unit 1647.

  Upon receiving the signal DIR from the routing daemon 24, the directivity control unit 1673 controls the antenna 11A to radiate an omnidirectional beam (omni-pattern beam) and receives the signal EXDR from the control unit 1671. The antenna 11A is controlled so as to sequentially switch the characteristics, and the directivity DR1, DR2,..., DR12 of the switched antenna 11A is output to the azimuth angle detection unit 1673.

  The azimuth angle detection unit 1673 receives the received signal strengths RSSI1 to RSSI12 from the transmission / reception unit 1672 and receives the directivity DR1, DR2,..., DR12 of the antenna 11A that is sequentially switched from the directivity control unit 1673. Then, the azimuth angle detection unit 1674 detects the azimuth angle θr of the adjacent wireless device based on the received signal strengths RSSI1 to RSSI12 and the directivities DR1 to DR12, and routes the detected azimuth angle θr. Send to daemon 24.

  FIG. 8 is a configuration diagram of the IP header. The IP header includes a version, header length, service type, packet length, identification number, flag, fragment offset, lifetime, protocol, header checksum, source IP address, destination IP address, and options.

  FIG. 9 is a configuration diagram of the TCP header. The TCP header includes a transmission source port number, a transmission destination port number, a sequence number, an acknowledgment (ACK) number, a data offset, a reservation, a flag, a window size, a header checksum, and an argent pointer.

  The transmission source port number is a number that identifies an application that has output a TCP packet when a plurality of applications are operating on the transmission source wireless device. The transmission destination port number is a number that identifies an application that delivers a TCP packet when a plurality of applications are operating on the transmission destination wireless device.

  TCP communication is an end-to-end connection-oriented communication protocol. A TCP module 21 of a wireless device that requests a connection connection of TCP communication (hereinafter referred to as “TCP communication connection request device”) has a connection in which SYN (Synchronize Flag) is set in Code Bit in the TCP header when the connection is established. The first packet indicating the connection request is transmitted to the TCP module 21 of the terminal that accepts the TCP communication connection connection (hereinafter referred to as “TCP communication connection accepting device”). In response to this, the TCP module 21 of the TCP communication connection accepting apparatus receives the second packet indicating the connection request acceptance and connection completion of the connection in which SYN and ACK (acknowledgment response) are set in the Code Bit in the TCP header. Transmit to the TCP module 21 of the requesting device. Further, in response to this, the TCP module 21 of the TCP communication connection requesting device sends a third packet indicating the connection completion of the connection in which the Code Bit in the TCP header is set to ACK (acknowledgment response) to the TCP of the TCP communication connection receiving device. Transmit to module 21.

  The connection disconnection request can be made from either the TCP communication requesting device or the TCP communication receiving device. The TCP module 21 of the wireless device that requests disconnection of TCP communication (hereinafter referred to as “TCP communication disconnection request device”) has a connection in which the Code Bit in the TCP header is set to FIN (Finish Flag) when the connection is disconnected. The first packet indicating the disconnection request is transmitted to the wireless device that accepts the disconnection of the TCP communication (hereinafter referred to as “TCP communication disconnection accepting device”). In response to this, the TCP module 21 of the TCP communication disconnection accepting apparatus receives the second packet indicating acceptance of the disconnection request for the connection in which the Code Bit in the TCP header is set to ACK (acknowledgment response) and the Code Bit in the TCP header. A third packet indicating completion of disconnection of the connection set in FIN is transmitted to the TCP module 21 of the TCP communication disconnection requesting device. Further, in response to this, the TCP module 21 of the TCP communication disconnection requesting device transmits a fourth packet indicating the completion of disconnection of the connection in which the Code Bit in the TCP header is set to ACK (acknowledgment response) to the TCP communication disconnection receiving device TCP. Transmit to module 21.

  FIG. 10 is a content diagram of the link state packet LSP. The link state packet LSP includes a packet length, a reservation, and adjacent terminal information IFT1, IFT2,.

  The adjacent terminal information IFT1 includes a transmission destination address 1, a transmission destination sequence number 1, the number of adjacent wireless devices, addresses 1 to N of adjacent wireless devices, link metrics 1 to N, distances 1 to N, and azimuth angles 1 to N. And consists of a reservation.

  The transmission destination address 1 is an IP address of a transmission destination wireless device. The transmission destination sequence number 1 represents the order in which the route for the wireless device represented by the transmission destination address 1 is generated. The number of adjacent wireless devices is the number of wireless devices adjacent to the wireless device that transmitted the link state packet LSP.

  [Address 1 of adjacent wireless device, reservation, link metric 1, distance 1, azimuth 1], ..., [address N of adjacent wireless device, reservation, link metric N, distance N, azimuth N] Each is one set, and the IP address of the wireless device adjacent to the wireless device that transmitted the link state packet LSP, the wireless device represented by the IP address, and the wireless device that transmitted the link state packet LSP, Between the wireless device represented by the IP address and the wireless device that transmitted the link state packet LSP, and the wireless device represented by the IP address is the link state packet LSP. Represents the direction existing with respect to the wireless device that transmitted.

  That is, each of the adjacent wireless device addresses 1 to N represents an IP address of a wireless device adjacent to the wireless device that transmitted the link state packet LSP, and each of the link metrics 1 to N is represented by an IP address. This represents the degree of stability of the path between the wireless device and the wireless device that transmitted the link state packet LSP, and each of the distances 1 to N represents the wireless device that transmitted the link state packet LSP and the wireless device represented by the IP address. Each of the azimuth angles 1 to N represents a direction in which the wireless device represented by the IP address exists with respect to the wireless device that has transmitted the link state packet LSP.

  Each of the link metrics 1 to N is determined based on the received signal strength. Table 1 shows the relationship between signal strength and metric value.

  When the signal strength is higher than −60 dB, the link metric value is “1”, and when the signal strength is in the range of −60 dB to −65 dB, the link metric value is “2” and the signal strength is from −65 dB to When the range is −70 dB, the link metric value is “4”, and when the signal strength is within the range of −70 dB to −75 dB, the link metric value is “8” and the signal strength is weaker than −75 dB. Then, the link metric value is “16”.

  Thus, the link metric value determined based on the received signal strength is stored in the link metrics 1 to N of the adjacent terminal information IFT1.

  Each of the distances 1 to N stores a distance measured by the distance measuring unit 163 by a method described later. Each of the azimuths 1 to N has an azimuth angle measured by a method described later by the azimuth measuring unit 164. Stored.

  Each of the adjacent terminal information IFT2,... Has the same configuration as the adjacent terminal information IFT1. The adjacent terminal information IFT1, IFT2,... Indicates information on wireless devices adjacent to the wireless device that relays wireless communication to different transmission destinations and transmits the link state packet LSP.

  For example, when the wireless device 2 illustrated in FIG. 1 transmits a link state packet LSP to the wireless device 1, the link state packet LSP includes two adjacent terminal information IFT1 and IFT2. The adjacent terminal information IFT1 includes a transmission destination address 1 composed of the IP address of the wireless apparatus 11, a number of adjacent wireless apparatuses composed of “2”, a transmission destination sequence number 1 composed of a predetermined positive integer, The address 1 of the adjacent wireless device composed of the IP address of the device 5, the link metric 1 composed of a predetermined positive integer, the distance 1 indicating the communication distance between the wireless device 2 and the wireless device 5, and the wireless device 2 The azimuth angle 1 indicating the direction in which the wireless device 5 exists, the address 2 (= N) of the adjacent wireless device consisting of the IP address of the wireless device 6, and the link metric 2 (= N), a distance 2 (= N) indicating a communication distance between the wireless device 2 and the wireless device 6, and an azimuth angle 2 (= N) indicating a direction in which the wireless device 6 exists with respect to the wireless device 2. Consists of. The adjacent terminal information IFT2 includes a transmission destination address 2 composed of the IP address of the wireless device 12, the number of adjacent wireless devices composed of “2”, a transmission destination sequence number 2 composed of a predetermined positive integer, The address 1 of the adjacent wireless device composed of the IP address of the device 3, the link metric 1 composed of a predetermined positive integer, the distance 1 indicating the communication distance between the wireless device 2 and the wireless device 3, and the wireless device 2 The azimuth angle 1 indicating the direction in which the wireless device 3 exists, the address 2 (= N) of the adjacent wireless device consisting of the IP address of the wireless device 4, and the link metric 2 (= N), a distance 2 (= N) indicating a communication distance between the wireless device 2 and the wireless device 4, and an azimuth angle 2 (= N) indicating a direction in which the wireless device 4 exists with respect to the wireless device 2. Consists of.

  FIG. 11 is a configuration diagram of the link state packet LSP and the data frame DAFM. Each of the link state packet LSP and the data frame DAFM includes a MAC header, a frame body, and an FSC (Frame Check Sequence). The MAC header is composed of 24 octets, the frame body is composed of 0 to 2313 octets, and the FCS is composed of 4 octets. Note that 1 Octet is equal to 8 bits.

  The MAC header includes frame control, duration / ID, priority flag, addresses 1 to 3 and sequence control. The frame control includes various control information such as a protocol version. In the address area, three addresses 1 to 3 are prepared, but the number of addresses varies depending on the frame type. Usually, two addresses 1 and 2 are used as a destination address and a source address. The duration / ID stores a scheduled period for using the wireless line. The priority flag is stored as a positive integer with a priority determined according to the type of data stored in the frame body. For example, the priority is set to the highest when transmitting urgent data, and the priority is set to relatively low when transmitting normal data. In this case, the higher the priority, the smaller the integer stored in the priority flag.

  The sequence control indicates the sequence number of the link state packet LSP or the data frame DAFM and the fragment number for the fragment.

  The frame body stores transmission data. The FCS stores a MAC header and an error detection code of the frame body.

  The contents of the link state packet LSP shown in FIG. 10 are stored in the frame body to generate the link state packet LSP, and the data to be transmitted to the transmission destination and the frequency setting information FQIF1 are stored in the frame body to generate the data frame DAFM. .

  FIG. 12 is a diagram showing an example of the routing table 20 shown in FIG. Note that the routing table 20 illustrated in FIG. 12 is a routing table held by the wireless device 1.

  The routing table 20 has a configuration in which the absolute positions of the wireless devices 2 to 15 with respect to the wireless device 1 when the position of the wireless device 1 is set as the origin in xy orthogonal coordinates are expressed by x and y coordinates. Each of m1 to m32 displayed between the two wireless devices represents a link metric value between the two wireless devices.

  As described above, the wireless device 1 holds the routing table 20 that represents the absolute positions of the other wireless devices 2 to 15 with respect to the self by the x and y coordinates.

  Each of the wireless devices 2 to 15 holds the absolute position of the other wireless device relative to itself in the form of the routing table 20 shown in FIG.

[Distance measurement method]
FIG. 13 is a diagram for explaining a method of measuring a distance between two adjacent wireless devices. In FIG. 13, the first and second distance measurement units 163A mounted on one wireless device functioning as a transmitter transmit the distance measurement unit 163B mounted on the other wireless device functioning as a receiver. Carrier waves are shown. The first carrier wave has a frequency fm, and the second carrier wave has a frequency fn.

  In FIG. 13, the vertical axis represents the amplitudes of the first and second carrier waves, and the horizontal axis represents the distance. R represents a communication distance from one wireless device as a transmitter to the other wireless device as a receiver. In one radio device as a transmitter, the first and second carrier waves are synchronized. For this reason, in one radio apparatus as a transmitter, the phases of the first and second carrier waves coincide with each other.

  Δφ represents a phase difference between the first carrier wave and the second carrier wave in the other radio apparatus as the receiver. Here, −π ≦ Δφ ≦ π.

  When the velocity of the radio wave is c, the wavelength of the carrier wave is λ, the frequency of the carrier wave is f, and the period of the carrier wave is T, the following equation is established.

c = λ / T = λf (1)
From the equation (1), the angular frequency ω of the carrier wave is as follows.

ω = 2π / T = 2πf (2)
When the distance R from one wireless device as a transmitter to the other wireless device as a receiver is expressed by a phase, it is 2πR / λ [rad].

  Therefore, using Equation (1), the phase 2πR / λ is expressed by the following equation.

2πR / λ = 2πRf / c (3)
Here, the first and second carrier waves in one of the wireless devices as the transmitter are expressed by equations (4) and (5), respectively.

w _1T = sin (2πfmt + φ ₁ ) (4)
w _2T = sin (2πfnt + φ ₂ ) (5)
In equations (4) and (5), w _1T and w _2T represent the amplitudes of the first and second carriers in the wireless device as the transmitter, respectively, t represents time, φ ₁ and φ ₂ Are respectively the phases of the first and second carrier waves in one radio apparatus as a transmitter.

  From Expressions (3) to (5), the first and second carriers in the other radio apparatus as the receiver can be expressed by Expressions (6) and (7), respectively.

w _1R = sin (2πfmt−2πRfm / c + φ ₁ ) (6)
w _2R = sin (2πfnt−2πRfn / c + φ ₂ ) (7)
In Equation (6) and Equation (7), w _1R and w _2R in the other radio apparatus as a receiver represent the amplitudes of the first and second carriers, respectively, and t represents time.

In one wireless device as a transmitter, the first and second carrier waves are synchronized, so φ ₁ = φ ₂ .

  Therefore, from the equations (6) and (7), the phase difference Δφ between the first and second carriers in the other radio apparatus as the receiver is expressed by the following equation.

Δφ = 2πR / c (fm−fn) = 2πR / c · Δf (8)
In Expression (8), Δf is the difference between the frequency fm and the frequency fn. When formula (8) is transformed, the following formula is obtained.

R = (c / 2π) · (Δφ / Δf)
= (CΔφ) / (2πΔf) (−π ≦ Δφ ≦ π) (9)
Here, it is assumed that the difference Δf between the frequency fm and the frequency fn is set to 1.0 MHz. In this case, when the phase difference Δφ is π, the distance R is calculated as follows from the equation (9).

R = (3.0 × 10 ⁸ × π) / (2π × 1.0 × 10 ⁶ ) = 150 [m]
Next, it is assumed that the difference Δf between the frequency fm and the frequency fn is set to 5.0 MHz. In this case, when the phase difference Δφ becomes π, the distance R is calculated as follows from the equation (9).

R = (3.0 × 10 ⁸ × π) / (2π × 5.0 × 10 ⁶ ) = 30 [m]
When the resolution Δφ _m for detecting the phase difference Δφ is 1.0 °, Δφ _m = 1.0 ° = π / 180 [rad].

When the difference Δf between the frequency fm and the frequency fn is 1.0 MHz, the distance detection resolution ΔR _m is expressed by the following equation from the equation (9).

ΔR _m = (3.0 × 10 ⁸ × π) / (2π × 1.0 × 10 ⁶ × 180) = 0.83 [m]
When the difference Δf between the frequency fm and the frequency fn is 5.0 MHz, the distance detection resolution ΔR _m is expressed by the following equation from the equation (9).

ΔR _m = (3.0 × 10 ⁸ × π) / (2π × 5.0 × 10 ⁶ × 180) = 0.17 [m]
Thus, when the difference Δf between the frequency fm and the frequency fn is set small, it is possible to measure a long distance with low resolution. Further, when the difference Δf between the frequency fm and the frequency fn is set large, it is possible to measure a short distance with high resolution.

  Therefore, one wireless device as a transmitter controls the difference Δf between the frequency fm and the frequency fn according to the distance between the wireless devices, so that the distance between the wireless devices can be measured with an appropriate resolution.

  As described above, in the first embodiment, the first carrier wave having the frequency fm and the second carrier wave having the frequency fn are received from the distance measuring unit 163A mounted on one radio apparatus as the transmitter. To the other wireless device. Then, the distance measuring unit 163B mounted on the other radio apparatus receives the first and second carrier waves and detects the phase difference Δφ between the received first and second carrier waves. Thereafter, the distance measuring unit 163B calculates the communication distance R between one wireless device and the other wireless device according to the equation (9) based on the detected phase difference Δφ, frequency fm, and frequency fn.

  In this way, by using the first and second carrier waves having different frequencies, the distance between the wireless devices can be measured with a simple configuration and at a low cost.

  In addition, since the frequency fn can be variably controlled in the distance measuring unit 163A, when the communication distance between wireless devices to be communicated is short, communication with high resolution can be performed by increasing the difference Δf between the frequency fm and the frequency fn. When the distance can be measured and the communication distance between wireless devices to be communicated is long, the difference Δf between the frequency fm and the frequency fn is reduced to reduce the resolution, but the long communication distance is measured. Can do.

  The distance measuring unit 163 of the wireless devices 1 to 15 illustrated in FIG. 1 includes the two distance measuring units 163A and 163B described above. In this case, the distance measuring units 163A and 163B share the antenna 11A. A switch for switching between transmission and reception is provided between the power amplifier 1637 of the distance measurement unit 163A, the low noise amplifier 1644 of the distance measurement unit 163B, and the antenna 11A.

  Therefore, each of the wireless devices 1 to 15 functions as a transmitter or a receiver in distance measurement, and can measure the communication distance R between adjacent wireless devices.

  FIG. 14 is a conceptual diagram in which each of a plurality of wireless devices existing on a wireless communication path from a transmission source to a transmission destination measures a distance between adjacent wireless devices. When the communication distance r12 is measured between the wireless devices 1 and 2, the wireless device 1 functions as a transmitter and the wireless device 2 functions as a receiver. When the communication distance r25 is measured between the wireless devices 2 and 5, the wireless device 2 functions as a transmitter and the wireless device 5 functions as a receiver. Similarly, when the communication distances r58, r811, and r1115 are measured, the wireless devices 5, 8, and 11 function as transmitters, and the wireless devices 8, 11, and 15 function as receivers, respectively.

  Accordingly, the wireless devices 1, 2, 5, 8, and 11 transmit the first carrier wave having the frequency fm and the second carrier wave having the frequency fn by the distance measuring unit 163A, and the wireless devices 2, 5, 8, 11 and 15 receive the first and second carrier waves by the distance measuring unit 163B, and based on the received first and second carrier waves, the communication distances r12, r25, r58, r811 and r1115 are calculated.

[Azimuth measuring method]
FIG. 15 is a plan view of a beam pattern radiated from the antenna 11A shown in FIG. The antenna 11A radiates beam patterns BPM1 to BPM12 having omnidirectional beam patterns BPM0 or directivities DR1 to DR12, respectively, according to control from the directivity control unit 1673.

  Assuming that the direction of directivity DR1 is 0 degree, the beam patterns BPM1 to BPM12 are 0 degree, 30 degrees, 60 degrees, 90 degrees, 120 degrees, 150 degrees, 180 degrees, 210 degrees, 240 degrees, and 270, respectively. Radiated in directions of degrees, 300 degrees and 330 degrees. The direction of 0 degrees is the x-axis direction of the routing table 20 shown in FIG.

  When the directivity control unit 1673 sequentially switches the directivity of the antenna 11A, for example, the directivity of the antenna 11A is switched in the order of directivity DR1, DR2,..., DR12. DR2,..., DR12 are sequentially output to the azimuth angle detection unit 1674.

  A method for measuring the azimuth angle θr12 of the wireless device 2 with respect to the wireless device 1 shown in FIG. 14 will be described.

  The routing daemon 24 of the wireless device 1 generates a signal DIR and transmits the signal DIR to the azimuth measuring unit 164 of the wireless interface module 16. The control unit 1671 of the azimuth angle measurement unit 164 of the wireless device 1 generates a signal RQ in accordance with the signal DIR from the routing daemon 24 and outputs the signal RQ to the transmission / reception unit 1672. Further, the directivity control unit 1673 of the wireless device 1 controls the antenna 11A so as to radiate the omnidirectional beam pattern BPM0 according to the signal DIR from the routing daemon 24.

  The transmission / reception unit 1672 of the wireless device 1 modulates and amplifies the signal RQ from the control unit 1671 and transmits the signal RQ via the antenna 11A that radiates the omnidirectional beam pattern BPM0.

  The antenna 11 </ b> A of the wireless device 2 receives the signal RQ from the wireless device 1 by the omnidirectional beam pattern BPM <b> 0 and outputs the received signal RQ to the transmitting / receiving unit 1672 of the azimuth measuring unit 164. The transceiver unit 1672 of the wireless device 2 demodulates and amplifies the signal RQ and outputs the signal RQ to the control unit 1671. The control unit 1671 of the wireless device 2 transmits the signal RQ to the routing daemon 24, and the routing daemon 24 generates data DADR for measuring the azimuth according to the signal RQ, and uses the generated data DADR as the MAC. The data is transmitted to the transmitting / receiving unit 1672 of the azimuth measuring unit 164 via a lower layer such as the module 17.

  The transmitting / receiving unit 1672 of the wireless device 2 transmits the data DADR from the routing daemon 24 via the antenna 11A that radiates the omnidirectional beam pattern BPM0 by modulating and amplifying the data DADR.

  In wireless device 1, control unit 1671 transmits signal RQ to wireless device 2 via antenna 11A, then generates signal EXDR and outputs it to directivity control unit 1673. Directivity control unit 1673 receives signal EXDR. In response, the directivity of the antenna 11A is sequentially switched to the directivity DR1, DR2,..., DR12, and the switched directivity DR1, DR2,. To do.

  The antenna 11A of the wireless device 1 receives the data DADR from the wireless device 2 while sequentially changing the directivity to directivity DR1, DR2,..., DR12, and outputs the received data DADR to the transmission / reception unit 1672. To do. Then, the transmitting / receiving unit 1672 demodulates and amplifies the data DADR received from the antenna 11A, and detects the received signal strength RSSI of the data DADR. In this case, the transmission / reception unit 1672 detects twelve received signal strengths RSSI1 to RSSI12 corresponding to the directivities DR1, DR2,..., DR12 of the antenna 11A. Then, the transmission / reception unit 1672 sequentially outputs the twelve received reception signal strengths RSSI1 to RSSI12 to the azimuth angle detection unit 1674.

  The azimuth angle detection unit 1674 sequentially receives twelve received signal strengths RSSI1 to RSSI12 from the transmission / reception unit 1672 and sequentially receives twelve directivities DR1, DR2,..., DR12 from the directivity control unit 1673. Then, the azimuth angle detection unit 1674 associates the received signal strengths RSSI1 to RSSI12 with the directivities DR1, DR2,..., DR12, and detects the maximum received signal strength RSSI_MAX among the received signal strengths RSSI1 to RSSI12. .

  Then, the azimuth angle detection unit 1674 detects the directivity (any one of directivity DR1, DR2,..., DR12) corresponding to the maximum received signal strength RSSI_MAX, and the direction of the detected directivity is the wireless device. An azimuth angle θr12 in which 2 is present. Then, the azimuth angle detection unit 1674 transmits the detected azimuth angle θr12 to the routing daemon 24.

  14 also detect the azimuth angles θr25, θr58, θr811, and θr1115 where the wireless devices 5, 8, 11, and 15 exist, respectively, by the same method as the wireless device 1 described above. To do.

  A method by which the routing daemon 24 of the wireless device 1 creates the routing table 20 will be described. The wireless device 1 receives the link state packet LSP from the adjacent wireless devices 2, 3 and 6 every short period, for example, every 5 seconds, and wireless devices 4 and 5 every 15 seconds, for example, every 15 seconds. , 7 to 15 receive the link state packet LSP. Thereby, the radio | wireless apparatus 1 recognizes the radio | wireless apparatuses 2-15 which exist around.

  The wireless device 1 then determines the absolute position of the wireless devices 2 to 15 and the link metric between adjacent wireless devices based on the terminal information of the link state packet LSP received from the wireless devices 2 to 15 present in the vicinity. A routing table 20 indicating values is created.

  FIGS. 16 to 19 are first to fourth contents diagrams of the link state packet received by the wireless device 1 that is the transmission source, respectively. The wireless device 1 receives the link state packet LSP1 shown in FIG. 16 from the wireless device 2, receives the link state packet LSP2 shown in FIG. 17 from the wireless device 3, and receives the link state packet LSP3 shown in FIG. The link state packet LSP4 shown in FIG. Each of link state packets LSP1 to LSP4 indicates only adjacent terminal information IFT1 whose transmission destination is wireless device 15.

  When the routing daemon 24 of the wireless device 1 receives the link state packets LSP1 to LSP3 from the wireless devices 2, 3, and 6 in a short period of time, the wireless device 1 respectively transmits the source address included in the MAC header of the link state packets LSP1 to LSP3. It is detected that the IP addresses 2, 3, and 6 are stored, and recognizes that the wireless devices 2, 3, and 6 are adjacent to the wireless device 1.

  When the routing daemon 24 of the wireless device 1 recognizes that the wireless devices 2, 3, and 6 are adjacent to the wireless device 1, the communication distances r12, r13 between the wireless device 1 and the wireless devices 2, 3, 6, respectively. , R16 is controlled to control the distance measuring unit 163, and the azimuth measuring unit 164 is measured to measure the azimuth angles θr12, θr13, and θr16 at which the wireless devices 2, 3, and 6 exist with respect to the wireless device 1. To control.

  Then, the distance measuring unit 163 measures the communication distances r12, r13, r16 between the wireless device 1 and each of the wireless devices 2, 3, 6 by the method described above, and transmits it to the routing daemon 24.

  In this case, when the wireless device 1 functions as a transmitter and the wireless devices 2, 3, and 6 function as receivers, the routing daemon 24 of the wireless device 1 uses the measured communication distances r12, r13, and r16 as the wireless device 1. The routing daemons 24 of the wireless devices 2, 3, 6 transmit the measured communication distances r <b> 12, r <b> 13, r <b> 16 to the wireless device 1.

  When the transmitter 1 functions as a receiver and the wireless devices 2, 3, and 6 function as transmitters, the routing daemon 24 of the wireless device 1 transmits radio waves of frequencies fm and fn to the wireless device 1. To the wireless devices 2, 3, 6, and the wireless devices 2, 3, 6 transmit radio waves of frequencies fm, fn to the wireless device 1. Then, the distance measuring unit 163 of the wireless device 1 measures the communication distances r12, r13, r16 by the above-described method and transmits them to the routing daemon 24.

  Then, the azimuth angle measuring unit 164 measures the azimuth angles θr12, θr13, and θr16 at which the wireless devices 2, 3, and 6 exist with respect to the wireless device 1 by the method described above and transmits the measured azimuth angles θr12, θr13, and θr16 to the routing daemon 24.

  The routing daemon 24 of the wireless device 1 wirelessly communicates with the wireless device 1 based on the communication distances r12, r13, r16 measured by the distance measuring unit 163 and the azimuth angles θr12, θr13, θr16 measured by the azimuth measuring unit 164. The absolute positions of the devices 2, 3 and 6 are plotted on the x and y coordinates.

  That is, the routing daemon 24 of the wireless device 1 sets the position of the wireless device 1 to the origin of the x and y coordinates, and determines the absolute position of the wireless device 2 relative to the wireless device 1 based on the communication distance r12 and the azimuth angle θr12. The calculated coordinates [r12cos (θr12), r12sin (θr12)] are calculated, and the calculated coordinates [r12cos (θr12), r12sin (θr12)] are plotted on the x and y coordinates as the absolute position of the wireless device 2 with respect to the wireless device 1. To do.

  Further, the routing daemon 24 of the wireless device 1 calculates coordinates [r13 cos (θr13), r13sin (θr13)] indicating the absolute position of the wireless device 3 with respect to the wireless device 1 based on the communication distance r13 and the azimuth angle θr13. Then, the calculated coordinates [r13cos (θr13), r13sin (θr13)] are plotted on the x, y coordinates as the absolute position of the wireless device 3 with respect to the wireless device 1.

  Further, the routing daemon 24 of the wireless device 1 calculates coordinates [r16 cos (θr16), r16sin (θr16)] indicating the absolute position of the wireless device 6 with respect to the wireless device 1 based on the communication distance r16 and the azimuth angle θr16. The calculated coordinates [r16cos (θr16), r16sin (θr16)] are plotted as x and y coordinates as the absolute position of the wireless device 6 with respect to the wireless device 1.

  Thereafter, the routing daemon 24 of the wireless device 1 receives the received electric field strength from the wireless interface module 16 when the link state packets LSP1 to LSP3 are received from the wireless devices 2, 3, and 6, respectively, and displays the received received electric field strength. 1 is converted into link metric values m1 to m3, and the converted link metric values m1 to m3 are written between the wireless devices 3, 2, and 6, respectively.

  Subsequently, the routing daemon 24 of the wireless device 1 detects that the wireless devices adjacent to the wireless device 2 are the wireless devices 4 and 5 based on the link state packet LSP1 received from the wireless device 2, and the wireless device 1 The absolute positions of the wireless devices 4 and 5 with respect to 1 are plotted on the x and y coordinates by the method described above.

  That is, the routing daemon 24 of the wireless device 1 determines that the wireless devices adjacent to the wireless device 2 are the wireless devices 4 and 5 based on the IP address of the wireless device 4 and the IP address of the wireless device 5 included in the link state packet LSP1. Detect that there is.

  Further, since the link state packet LSP1 includes the communication distance r24 between the wireless device 2 and the wireless device 4 and the azimuth angle θr24 indicating the direction in which the wireless device 4 is present with respect to the wireless device 2, the routing daemon 24 of the wireless device 1 is included. Calculates the coordinates [r24cos (θr24), r24sin (θr24)] indicating the absolute position of the wireless device 4 with respect to the wireless device 2 based on the communication distance r24 and the azimuth angle θr24, and the calculated coordinates [r24cos ( [theta] r24), r24sin ([theta] r24)] is added to coordinates [r12cos ([theta] r12), r12sin ([theta] r12)] indicating the absolute position of the wireless device 2 with respect to the wireless device 1 to indicate the absolute position of the wireless device 4 with respect to the wireless device 1 [R12cos (θr12) + r24cos (θr24), r12sin (θr12) + r2 4sin (θr24)] is calculated. Then, the routing daemon 24 of the wireless device 1 uses the calculated coordinates [r12cos (θr12) + r24cos (θr24), r12sin (θr12) + r24sin (θr24)] as x and y coordinates as the absolute position of the wireless device 4 with respect to the wireless device 1. While plotting, the link metric value m7 contained in the link state packet LSP1 is expressed between the wireless device 2 and the wireless device 4.

  The routing daemon 24 of the wireless device 1 similarly coordinates [r12 cos (θr12) + r25 cos] indicating the absolute position of the wireless device 5 with respect to the wireless device 1 based on the communication distance r25 and the azimuth angle θr25 included in the link state packet LSP1. (Θr25), r12sin (θr12) + r25sin (θr25)] is calculated, and the calculated coordinates [r12cos (θr12) + r25cos (θr25), r12sin (θr12) + r25sin (θr25)] are calculated as absolute values of the radio device 5 The position is plotted on the x and y coordinates, and the link metric value m8 included in the link state packet LSP1 is expressed between the wireless device 2 and the wireless device 5.

  Similarly, the routing daemon 24 of the wireless device 1 plots the absolute position of the wireless device 4 with respect to the wireless device 1 in the x and y coordinates based on the link state packet LSP2 shown in FIG. The included link metric value m6 is expressed between the wireless device 3 and the wireless device 4.

  Similarly, the routing daemon 24 of the wireless device 1 plots the absolute positions of the wireless devices 5, 9, and 10 with respect to the wireless device 1 on the x and y coordinates based on the links state packet LSP3 shown in FIG. The link metric values m9, m10, and m11 included in the link state packet LSP2 are respectively set between the wireless device 6 and the wireless device 5, between the wireless device 6 and the wireless device 9, and between the wireless device 6 and the wireless device 10. Indicate.

  The absolute position of the wireless device 5 with respect to the wireless device 1 plotted based on the link state packet LSP3 is the absolute position of the wireless device 5 from the wireless device 1 via the wireless device 6. The absolute position of the wireless device 5 with respect to the wireless device 1 calculated based on the distance r65 and the azimuth angle θr65 of the link state packet LSP3 is a wireless device calculated based on the distance r25 and the azimuth angle θr25 of the link state packet LSP1. 1 coincides with the absolute position of the wireless device 5.

  Further, the routing daemon 24 of the wireless device 1 receives the link state packet LSP4 shown in FIG. 19 from the wireless device 5, and similarly, based on the received link state packet LSP4, the wireless devices 7, The absolute positions of 8 and 9 are plotted on the x and y coordinates, and the link metric values m13, m17, and m18 included in the link state packet LSP4 are respectively transmitted between the wireless device 5 and the wireless device 7, and the wireless device 5 and the wireless device. 8 and between the wireless device 5 and the wireless device 9. The absolute positions of the wireless devices 7, 8, and 9 with respect to the wireless device 1 plotted based on the link state packet LSP3 are the absolute positions of the wireless devices 7, 8, and 9 from the wireless device 1 via the wireless devices 2 and 5. It is.

  The routing daemon 24 of the wireless device 1 plots the absolute positions of the wireless devices 7 to 15 with respect to the wireless device 1 in x and y coordinates based on the link state packets received from the wireless devices 7 to 15. A link metric value is written between adjacent wireless devices.

  Thereby, the routing table 20 shown in FIG. 12 is completed.

  Each of the routing daemons 24 of the wireless devices 2 to 15 is a routing table composed of absolute positions of other wireless devices relative to itself and link metric values between adjacent wireless devices by the same method as the routing daemon 24 of the wireless device 1. 20 is created.

  The link metric values m1 to m32 described in the routing table 20 are determined according to Table 1 based on the received electric field strength RSSI. However, when the received signal strength RSSI is converted into the link metric values m1 to m32, the received signal strength RSSI. Are divided into a plurality of regions (region RGE1 stronger than −60 dB, region RGE2 from −60 dB to −65 dB, region RGE3 from −65 dB to −70 dB, region RGE4 from −70 dB to −75 dB, and region RGE5 weaker than −75 dB). As the received signal strength RSSI decreases from the region RGE1 to the region RGE5, the link metric value increases by a power of 2. That is, as the received signal strength RSSI decreases linearly, the link metric value increases exponentially.

  Thus, by increasing the link metric value as a path stability index exponentially as the received signal strength RSSI decreases linearly (that is, as the received signal strength RSSI increases linearly as a path stability index). By making the link metric value of the index exponentially small), a path with a higher degree of stability can be easily selected.

  That is, when the link metric value is increased linearly as the received signal strength RSSI decreases linearly, the difference in link metric value due to the difference in received signal strength RSSI decreases. If the routing table 20 is referred to, the total metric number (= added value of link metric value of each route) in the entire route from the wireless device 1 to the wireless device 15 can be calculated, but the received signal strength RSSI varies. However, when a link metric value whose value does not change greatly is used, a large difference does not occur in the plurality of total metrics assigned to the plurality of paths from the transmission source to the transmission destination.

  In contrast, when the link metric value increases exponentially as the received signal strength RSSI decreases linearly, the link metric value changes greatly with respect to the change in the received signal strength RSSI. As a result, there is a great difference in the number of total metrics assigned to the plurality of paths from the transmission source to the transmission destination.

  Therefore, in the present invention, the link metric value increases exponentially as the received signal strength RSSI decreases linearly.

[Wireless communication path establishment operation]
FIG. 20 is a diagram illustrating the relationship between received power and distance in a multipath environment. In FIG. 20, the vertical axis represents received power, and the horizontal axis represents distance. A curve k1 shows the relationship between received power and distance in vertical polarization, and a curve k2 shows the relationship between received power and distance in horizontal polarization.

  The received power decreases exponentially as the distance becomes longer, and when the distance exceeds about 2 m, a distance where the received power greatly decreases appears periodically. The large decrease in received power is greater in the vertically polarized wave than in the horizontally polarized wave.

Therefore, in the present invention, the threshold P _rth provided on the received power P _r, from the transmission by excluding a route received power P _r between adjacent radio device drops below the threshold P _rth source to a destination Send data. That is, the sender transmits the data via the paths with the communication distance than the particular communication distance received power P _r becomes lower than the threshold value P _rth between adjacent wireless devices to a destination.

Accordingly, the IP module 19 of the wireless device 1 that is the transmission source holds a specific communication distance r _{ds in} which the received power P _r is lower than the threshold value P _rth , and the wireless device 11 that is the transmission destination of the data When transmitting to, the routing table 20 is referred to, and the communication route to the wireless device 11 is determined by selecting a route in which the communication distance between adjacent wireless devices is a communication distance other than the specific communication distance r _ds .

For example, when the communication distance r610 between the communication distance r811 and wireless device 6 and the wireless device 10 between the wireless device 8 and the wireless device 11 is a specific communication distance _{r ds,} IP module 19 of the wireless device 1 , The route from the wireless device 8 to the wireless device 11 and the route from the wireless device 6 to the wireless device 10, and the route having the minimum total metric number to the wireless device 11: wireless device 1 → wireless device 6 → wireless device 9 → wireless The device 11 is determined as a communication path to the wireless device 11.

Note that when the communication distance between all adjacent wireless devices does not match the specific communication distance r _ds , the IP module 19 determines the communication route to the wireless device 11 as the route with the minimum total metric number to the wireless device 11. And decide.

As described above, when the IP module 19 of the wireless device 1 receives a TCP packet from the TCP module 21 which is an upper layer, the IP module 19 is based on the absolute positions (x, y coordinates) of the wireless devices 1 to 15 plotted in the routing table 20. Then, the communication distance between the adjacent wireless devices is calculated, and it is determined whether or not there is a communication distance that matches the specific communication distance r _ds among the calculated communication distances. Then, when there is a communication distance between the wireless devices that matches the specific communication distance r _ds , the IP module 19 of the wireless device 1 uses a route other than the route having the communication distance to determine the total metric to the transmission destination. The route with the smallest number is determined. In addition, when there is no communication distance between the wireless devices that matches the specific communication distance r _ds , the IP module 19 of the wireless device 1 targets the total metric to the transmission destination for all routes indicated in the routing table 20. The route with the smallest number is determined.

Although it has been described that the IP module 19 of the wireless device 1 has a specific communication distance r _ds , in the present invention, the IP module 19 of the wireless device 1 sets the specific communication distance r _ds by the following method. You may decide.

  Under a multipath environment, the relationship between received power and distance is expressed by the following equation.

P _r = P _t G _t G _r [D _d {λ / (4πr _d )} + D _r {λ / (4πr _r )} Γexp [−j {k (r _d −r _r ) + φ}]] ^2.・ (10)
However, _{P r:} received power, _{P t:} transmission power, _{G r:} gain of the receiving antenna, _{G t:} gain of the transmitting antenna, _{D d:} directional gain of the transmission and reception of the direct wave antenna, _{D r:} transmission and reception of the indirect waves Antenna directivity gain, r _d : propagation distance of direct wave, r _r : propagation distance of indirect wave, k = 2π / λ, λ: wavelength of radio wave, Γ: reflection coefficient of asphalt road surface, Φ: reflection of asphalt road surface FIG. 21 is a diagram showing the relationship between the absolute value | Γ | of the reflection coefficient and the phase delay Φ and the incident angle θi. In FIG. 21, the vertical axis represents the absolute value | Γ | of the reflection coefficient and the phase delay Φ, and the horizontal axis represents the incident angle θi. A curve k3 shows the relationship between the absolute value | Γ | of the reflection coefficient in the vertically polarized wave and the incident angle θi, and a curve k4 shows the relationship between the phase delay Φ in the vertically polarized wave and the incident angle θi. A curve k5 shows the relationship between the absolute value | Γ | of the reflection coefficient in the horizontally polarized wave and the incident angle θi, and a curve k6 shows the relationship between the phase delay Φ in the horizontally polarized wave and the incident angle θi.

  The incident angle θi is an angle at which radio waves radiated from the antennas 11A of the wireless devices 1 to 15 enter the road surface, and is determined by the height of the antennas 11A in the wireless devices 2 to 15 from the road surface. The incident angle θi is relatively small when the height from the road surface of the antenna 11A in the wireless devices 1 to 15 is relatively high, and the height from the road surface of the antenna 11A in the wireless devices 1 to 15 is high. If it is relatively low, it becomes relatively large.

Therefore, if the incident angle θi is determined using the height from the road surface of the antenna 11A, the absolute values | Γ | of the reflection coefficients in the vertical polarization and the horizontal polarization using the curves k3 to k6 shown in FIG. The phase delay Φ is determined. Also, transmission power P _t , receiving antenna gain G _r , transmitting antenna gain G _t , direct wave transmitting / receiving antenna directivity gain D _d , indirect wave transmitting / receiving antenna directivity gain D _r , k = 2π / λ , And the wavelength λ of the radio wave are known, the IP module 19 of the wireless device 1 determines the absolute value | Γ | of the reflection coefficient, the phase delay Φ, the transmission power P _t , the gain G _{r of the} receiving antenna, Received power by substituting gain G _t , direct wave transmission / reception antenna directivity gain D _d , indirect wave transmission / reception antenna directivity gain D _r , k = 2π / λ, and radio wave wavelength λ into equation (10). The propagation distance r _d of the direct wave in which P _r falls _{below the} threshold value P _rth is calculated, and the calculated propagation distance r _d is determined as a specific communication distance r _ds . Then, the IP module 19 of the wireless device 1 determines a route to the transmission destination by the above-described method using the determined specific communication distance _rds .

  The IP modules 19 of the wireless devices 2 to 15 also determine the route to the transmission destination by the above-described operation when the wireless devices 2 to 15 are the transmission sources.

FIG. 22 is a flowchart for explaining an operation of establishing a wireless communication path between a transmission source and a transmission destination. When the wireless device 1 performs wireless communication with the wireless device 11, the IP module 19 of the wireless device 1 that is the transmission source refers to the routing table 20, and the communication distance between adjacent wireless devices is a specific communication distance r _ds. A route having the smallest total metric number among routes having a communication distance other than is determined as a route for performing wireless communication with the wireless device 11. That is, the IP module 19 of the wireless device 1 refers to the routing table 20 and excludes a route in which the communication distance between adjacent wireless devices matches the specific communication distance r _ds (step S1). Then, the IP module 19 of the wireless device 1 uses a wireless device 1-wireless device 6-wireless device 9-wireless device that is a more stable route from a route other than a route having a communication distance matching the specific communication distance _rds. 11 route rt1 is determined as a route for wireless communication with wireless device 11. In this case, IP module 19 of the wireless device 1, in step S1, if the communication distance that match a particular communication distance r _ds not exist in the routing table 20, the radio path rt1 as for all routes in the routing table 20 The route for wireless communication with the device 11 is determined.

  Thereafter, the IP module 19 of the wireless device 1 adds route information indicating the route rt1 = [wireless device 1 → wireless device 6 → wireless device 9 → wireless device 11] to the route request packet RREQ1 generated by the routing daemon 24. Then, the route request packet RREQ1 is unicasted at the frequency f1 along a more stable path (step S2). That is, the wireless device 1 transmits the route request packet RREQ1 to the wireless device 2 at the frequency f1.

  The route request packet RREQ1 includes an IP header portion HED_Q and a data portion DA_Q. The IP header portion HED_Q includes a transmission source address and a transmission destination address. The data part DA_Q includes a type, the number of hops, a route request packet identification ID, a transmission destination IP address, a transmission source IP address, and route information.

  The source address of the IP header portion HED_Q is the address of the wireless device that transmits the route request packet RREQ1, and each wireless device that receives the route request packet RREQ1 transmits next in the reverse communication path from the transmission destination to the transmission source. This is an address that is recognized as a wireless device to be operated. The source address is changed by the wireless device that relays the route request packet RREQ1.

  The transmission destination address of the IP header portion HED_Q is sequentially changed along a route rt1 of [wireless device 1 → wireless device 6 → wireless device 9 → wireless device 11].

  The type of the data part DA_Q is composed of “rreq” indicating that the route request packet RREQ1 is a packet requesting establishment of a route, and this “rreq” is not changed.

  The number of hops represents the number of hops from the generation source of the route request packet RREQ1 to each wireless device that relays the route request packet RREQ1. Therefore, the number of hops is incremented by “1” by the wireless device that relays the route request packet RREQ1.

  The route request packet identification ID is a sequence number that identifies each of a plurality of route request packets RREQ1 that are sequentially generated. And this route request packet specific ID is not changed once it is given.

  The transmission destination IP address is the IP address of the wireless device that is the final transmission destination in the communication path to be established. The destination IP address is unchanged.

  The transmission source IP address is an IP address of a generation source of the route request packet RREQ1. Therefore, this source IP address is unchanged.

  The route information includes route rt1 = [wireless device 1 → wireless device 6 → wireless device 9 → wireless device 11] determined by the IP module 19 of the wireless device 1 that is the transmission source.

  Therefore, the IP module 19 of the wireless device 1 generates a route request packet RREQ1 including [{src1 / dst6} / {rreq / 1 / rreqID / dst11 / src1 / (addr1-addr6-addr9-addr11)}]. Unicast at frequency f1 along a more stable path.

  The wireless devices 2, 3, and 6 adjacent to the wireless device 1 receive the route request packet RREQ1 from the wireless device 1 at the frequency f1. Then, the routing daemon 24 of the wireless devices 2 and 3 detects “dst6” as the transmission destination address included in the route request packet RREQ1, and detects that the route request packet RREQ1 is not transmitted to the wireless devices 2 and 3. Then, the relay of the route request packet RREQ1 is stopped.

  On the other hand, the routing daemon 24 of the wireless device 6 detects “dst6” as the transmission destination address included in the route request packet RREQ1, and detects that the route request packet RREQ1 has been transmitted to the wireless device 6. Then, the IP module 19 of the wireless device 6 selects a more stable route by referring to the route information (addr1-addr6-addr9-addr11) included in the data part DA_Q of the route request packet RREQ1, and selects the route request packet RREQ1. Relay.

That is, the IP module 19 of the wireless device 6 has a communication distance that matches a specific communication distance r _ds in the route to the wireless device 11 in the route to the wireless devices 5, 9, and 10 adjacent to the wireless device 6. excluding a path (step S3), and then select a more stable path from the path that the communication distance becomes a communication distance than the particular communication distance r _ds relays a route request packet RREQ1 (step S4). Note that the IP module 19 of the wireless device 6 is connected to the wireless device 6 and the wireless device when the communication distance between the wireless device 6 and each of the wireless devices 5, 9, 10 does not match the specific communication distance r _ds. A more stable route is selected from the three routes 5, 9, and 10, and the route request packet RREQ1 is relayed.

  In this case, the IP module 19 of the wireless device 6 selects the route from the wireless device 6 to the wireless device 9, changes the transmission destination address of the route request packet RREQ1 from “dst6” to “dst9”, and changes the transmission source address to “src1”. “1” is added to the number of hops from the wireless device 1 to the wireless device 6 in place of “src6” to “src6”, and the route request packet RREQ1 = [{src6 / dst9} / {rreq / 2 / rreqID / dst11 / src1 / (addr1-addr6-addr9-addr11)}].

  Then, the IP module 19 of the wireless device 2 sends the generated route request packet RREQ1 = [{src6 / dst9} / {rreq / 2 / rreqID / dst11 / src1 / (addr1-addr6-addr9-addr11)}] to the frequency. Relay by unicasting at f1.

  Further, the IP module 19 of the wireless device 6 determines that the wireless device to be transmitted next by the wireless device 6 in the reverse communication path from the wireless device 11 to the wireless device 1 is the wireless device 1 based on the transmission source address src1. recognize.

Thereafter, in the same manner as the wireless device 6, the wireless device 9 excludes a route whose communication distance matches the specific communication distance r _ds until the route request packet RREQ1 reaches the transmission destination wireless device 11, and A more stable route is selected and the route request packet RREQ1 is relayed at the frequency f1 (steps S3 and S4).

  When receiving the route request packet RREQ1, the routing daemon 24 of the wireless device 11 that is the transmission destination detects that it is the transmission destination based on the transmission destination IP address dst11 included in the route request packet RREQ1, and sends a route response packet. RREP1 is generated.

  In this case, the route reply packet RREP1 includes an IP header portion HED_P and a data portion DA_P. The IP header portion HED_P includes a transmission source address and a transmission destination address. The data part DA_P includes a type, the number of hops, a transmission destination IP address, a transmission source IP address, and route information.

  The source address of the IP header portion HED_P is the address of the wireless device that transmits the route reply packet RREP1. The source address is changed by the wireless device that relays the route reply packet RREP1.

  The transmission destination address of the IP header part HED_P is the transmission source IP address included in the route request packet RREQ1.

  The type of the data part DA_P is composed of “rrep” indicating that the route reply packet RREP1 is a reply to the route request packet RREQ1, and this “rrep” is not changed.

  The number of hops represents the number of hops from the wireless device having the destination IP address included in the route request packet RREQ1 to each wireless device that relays the route reply packet RREP1. Therefore, the number of hops is incremented by “1” by the wireless device that relays the route reply packet RREP1.

  The transmission destination IP address is the IP address of the transmission destination of the established communication path. The destination IP address is not changed.

  The transmission source IP address is the IP address of the transmission source of the established communication path.

  The route information includes [wireless device 11 → wireless device 9 → wireless device 6 → wireless device 1].

  Accordingly, the routing daemon 24 of the wireless device 11 generates a route reply packet RREP1 composed of [{src11 / dst9} / {rrep / 1 / dst11 / src1 / route information}], and the generated route reply packet RREP1 = [ {Src11 / dst9} / {rrep / 1 / dst11 / src1 / route information}] is transmitted to the IP module 19.

  The IP module 19 receives “(addr11-addr9-addr6-) in the“ route information ”of the route reply packet RREP1 = [{src11 / dst9} / {rrep / 1 / dst11 / src1 / route information}] received from the routing daemon 24. addr1) "is stored to generate a route reply packet RREP1 = [{src11 / dst9} / {rrep / 1 / dst11 / src1 / (addr11-addr9-addr6-addr1)}], and the generated route reply packet RREP1 = [{Src11 / dst9} / {rrep / 1 / dst11 / src1 / (addr11-addr9-addr6-addr1)}] is transmitted at the frequency f1 along the route that received the route request packet RREQ1. That is, since the routing daemon 24 of the wireless device 11 has received the route request packet RREQ1 from the wireless device 9, the IP module 19 of the wireless device 11 transmits the route response packet RREP1 to the wireless device 9.

  The routing daemon 24 of the wireless device 9 receives the route reply packet RREP1 = [{src11 / dst9} / {rrep / 1 / dst11 / src1 / (addr11-addr9-addr6-addr1)}] from the wireless device 11, and The source address src11 of the received route reply packet RREP1 = [{src11 / dst9} / {rrep / 1 / dst11 / src1 / (addr11-addr9-addr6-addr1)}] is set to the source address src9 indicating the wireless device 9 Instead, the destination address dst9 is replaced with the destination address dst6 based on the route information (addr11-addr9-addr6-addr1), and “1” is added to the number of hops that is the number of routes from the wireless device 11 to the wireless device 9. Route response packet RREP1 = [{src9 / dst6} / {rrep / 2 / dst11 / src1 / (addr11-addr9-addr6-addr1)}] is generated, and the generated route reply packet RREP1 = [{src9 / dst6} / {rrep / 2 / dst11 / src1 / (addr11-addr9-addr6-addr1)}] is transmitted to the IP module 19. Then, the IP module 19 of the wireless device 9 sends the route reply packet RREP1 = [{src9 / dst6} / {rrep / 2 / dst11 / src1 / (addr11-addr9-addr6-addr1)}] at the frequency f1. Send to.

  Thereafter, similarly, the wireless device 6 relays the route reply packet RREP1, and the wireless device 1 receives the route reply packet RREP1 from the wireless device 11 (step S5). Thus, a wireless communication path for performing wireless communication between the wireless device 1 and the wireless device 11 is established.

  FIG. 23 is a flowchart for explaining detailed operations in steps S2 and S4 shown in FIG. When a series of operations starts, the IP module 19 of the wireless device 1 or the repeater (such as the wireless device 6) refers to the routing table 20, and the total metric number is the same as that of the transmission destination (wireless device 11). It is determined whether there are a plurality of routes (step S11). More specifically, the IP module 19 of the wireless device 1 or the repeater (such as the wireless device 2) adds the link metric values m1 to m32 between the adjacent wireless devices indicated in the routing table 20 to each route. The total metric number is calculated, and based on the calculated total metric number, it is determined whether there are a plurality of paths having the same total metric number.

  Then, when there are not a plurality of routes having the same total metric number, the IP module 19 of the wireless device 1 or the repeater (such as the wireless device 6) selects a route having the minimum total metric number from the plurality of routes. The data is transmitted or relayed along the selected route (step S12).

  On the other hand, when it is determined in step S11 that there are a plurality of routes having the same total metric number, the IP module 19 of the wireless device 1 or the repeater (such as the wireless device 6) is set as the transmission destination (wireless device 11). On the other hand, it is determined whether there are a plurality of routes having the same number of hops (step S13).

  When there are a plurality of routes having the same number of hops, the routing daemon 24 of the wireless device 1 or the repeater (wireless device 6 or the like) selects one of the routes from the plurality of routes, and the selected route The data is transmitted or relayed along (Step S14).

  On the other hand, when it is determined in step S13 that a plurality of routes having the same number of hops does not exist, the IP module 19 of the wireless device 1 or the repeater (wireless device 6 or the like) selects a plurality of routes having the smallest number of hops. A route is selected, and data is transmitted or relayed along the selected route (step S15).

  Thereby, the detailed operation of steps S2 and S4 shown in FIG. 22 is completed.

As described above, the present invention excludes the path communication distance between adjacent wireless devices matches a specific communication distance r _ds, based on the number of total metrics, consistent communication distance to a specific communication distance r _ds A route for transmitting or relaying data is determined from among the routes not to be transmitted, and when a route cannot be determined based on the total metric number, a route for transmitting or relaying data is determined based on the number of hops to the destination. In other words, the present invention excludes a route (= route whose communication distance matches a specific communication distance r _ds ) that leads to interruption of wireless communication, and transmits data on a more stable route based on the degree of stability of the route. When the route is determined to be relayed and the route cannot be determined depending on the degree of stability of the route, the route for transmitting or relaying data is determined based on the number of hops to the transmission destination.

  As a result, data can be transmitted to the transmission destination via a stable path. As a result, the throughput when transmitting data can be improved. In the conventional ad hoc network, when the number of hops to the transmission destination increases, the throughput decreases with the increase in the number of hops. Excludes routes that lead to communication interruption, and transmits data to the destination via a route with a smaller total metric number, that is, with a higher degree of stability, so even if the number of hops increases, data can be sent stably It can be transmitted to the destination and throughput can be improved. That is, the wireless device according to the present invention selects a route with a higher degree of stability and transmits or relays data, so that data retransmission between wireless devices is extremely low, and throughput can be improved.

[Wireless communication operation between source and destination]
An operation of performing wireless communication between the transmission source (wireless device 1) and the transmission destination (wireless device 11) will be described. FIG. 24 is a flowchart for explaining a wireless communication operation between a transmission source and a transmission destination.

  When a series of operations is started, the TCP module 21 of the wireless device 1 that is a transmission source receives data to be transmitted from an upper layer, stores the received data in a TCP data portion, and stores a TCP header in the TCP data portion. To create a TCP packet and transmit it to the IP module 19.

  When receiving the TCP packet from the TCP module 21, the IP module 19 of the wireless device 1 stores the received TCP packet in the IP data portion, and creates an IP packet by adding an IP header to the IP data portion. Then, the IP module 19 transmits the created IP packet to the MAC module 17 via the LLC module 18.

  Further, the IP module 19 of the wireless device 1 creates frequency setting information FQIF1 indicating the frequency used by the wireless devices 1, 6, 9, and 11. That is, the IP module 19 creates frequency setting information FQIF1 composed of [wireless device 1 → f1 → wireless device 6 → f2 → wireless device 9 → f3 → wireless device 11], and uses the created frequency setting information FQIF1 as the LLC module. 18 to the MAC module 17.

  Further, the IP module 19 of the wireless device 1 generates a frequency selection signal FQSL2 for selecting the frequency f1 as the frequency fy, and outputs the frequency selection signal FQSL2 to the transmission / reception unit 1621 and the BPF 1623 of the communication unit 162 included in the wireless interface module 16.

  Then, the MAC module 17 of the wireless device 1 stores the IP packet and the frequency setting information FQIF1 received from the IP module 19 in the frame body, and sets the priority according to the type of data included in the IP packet as a priority flag. The data frame DAFM is stored to create the data frame DAFM, and the created data DAFM is transmitted to the transmission / reception unit 1621 of the communication unit 162 included in the wireless interface module 16.

  The transmission / reception unit 1621 of the communication unit 162 selects the frequency f1 specified by the frequency selection signal FQSL2 received from the IP module 19 as the frequency fy, and modulates the data frame DAFM received from the MAC module 17 by the selected frequency f1. . Then, the transmitting / receiving unit 1621 transmits the modulated data frame DAFM to the BPF 1623 via the channel Ch1 having the frequency f1 specified by the frequency selection signal FQSL2.

  The BPF 1623 passes the data frame DAFM having the frequency f1 specified by the frequency selection signal FQSL2 from the IP module 19 and transmits it to the antenna 11A. Then, the antenna 11A unicasts the data frame DAFM from the communication unit 162. As a result, the wireless device 1 that is the transmission source unicasts the data and the frequency setting information FQIF1 at the frequency f1 (step S21).

  The IP module 19 of the wireless device 6 generates a frequency switching signal FQEX1 and outputs it to the communication unit 161 included in the wireless interface module 16. Based on the frequency switching signal FQEX1 from the IP module 19, the BPF 1613 of the communication unit 161 receives the signal from the antenna 11A while changing the frequency in the range of frequencies f1 to f14.

  Since the wireless device 1 transmits the data frame DAFM at the frequency f1, the BPF 1613 of the communication unit 161 of the wireless device 6 passes only the data frame DAFM having the frequency f1 among the signals received by the antenna 11A, and passes the data frame DAFM. The processed data frame DAFM is output to the transmission / reception unit 1611 via the channel Ch1 having the frequency f1.

  Then, the transmitting / receiving unit 1611 demodulates the data frame DAFM received via the channel unit 1612 and transmits it to the upper layer.

  The MAC module 17 of the wireless device 6 extracts the frequency setting information FQIF1 stored in the frame body of the data frame DAFM, and transmits the extracted frequency setting information FQIF1 to the IP module 19 via the LLC module 18. The IP module 19 of the wireless device 6 receives the frequency setting information FQIF1 from the MAC module 17, and the received frequency setting information FQIF1 = [wireless device 1 → f1 → wireless device 6 → f2 → wireless device 9 → f3 → wireless device]. 11], the wireless device 6 detects that the data frame DAFM should be relayed to the wireless device 9 at the frequency f2.

  Then, the IP module 19 of the wireless device 6 selects the frequency f2 to be selected as the frequency fy from the range of the frequencies f1 to f14, generates the frequency selection signal FQSL2 for selecting the frequency f2, and sends it to the wireless interface module 16 The data is output to the transmission / reception unit 1621 and the BPF 1623 of the included communication unit 162. Also, the IP module 19 of the wireless device 6 transmits the frequency setting information FQIF1 to the MAC module 17 via the LLC module 18.

  When receiving the frequency setting information FQIF1 from the IP module 19, the MAC module 17 of the wireless device 6 stores the received frequency setting information FQIF1 in the frame body of the data frame DAFM and transmits it to the wireless interface module 16.

  The transmission / reception unit 1621 of the communication unit 162 included in the wireless interface module 16 of the wireless device 6 selects the frequency f2 specified by the frequency selection signal FQSL2 received from the IP module 19 as the frequency fy, and performs the MAC by the selected frequency f2. Modulate the data frame DAFM received from the module 17. Then, the transmitting / receiving unit 1621 transmits the modulated data frame DAFM to the BPF 1623 via the channel Ch2 having the frequency f2 specified by the frequency selection signal FQSL2.

  The BPF 1623 passes the data frame DAFM having the frequency f2 designated by the frequency selection signal FQSL2 from the IP module 19 and transmits it to the antenna 11A. Then, the antenna 11A unicasts the data frame DAFM from the communication unit 162. As a result, the wireless device 6 as a repeater unicasts the data and the frequency setting information FQIF1 at the frequency f2.

  Similarly to the wireless device 6, the wireless device 9 receives the data frame DAFM from the wireless device 6, transmits the data frame DAFM to the wireless device 11, and relays the data frame DAFM.

  That is, the repeater composed of the wireless devices 6 and 9 searches for a frequency, and at the frequency fi (i = 1, 2), the transmitter (wireless device 1) or the relay device (wireless device 6) that exists in the direction of the transmitter. The data frame DAFM (data and frequency setting information FQIF1) is received from (step S22).

  Then, the wireless devices 6 and 9 select a frequency fj (j = 2, 3) different from the frequency fi based on the frequency setting information FQIF1, and unite the data frame DAFM (data and frequency setting information FQIF1) with the frequency fj. Cast (step S23).

  Then, the IP module 19 of the wireless device 11 generates the frequency switching signal FQEX1 and outputs it to the communication unit 161 included in the wireless interface module 16. Based on the frequency switching signal FQEX1 from the IP module 19, the BPF 1613 of the communication unit 161 receives the signal from the antenna 11A while changing the frequency in the range of frequencies f1 to f14.

  Since the wireless device 9 transmits the data frame DAFM at the frequency f3, the BPF 1613 of the communication unit 161 of the wireless device 11 passes only the data frame DAFM having the frequency f3 among the signals received by the antenna 11A and passes the data frame DAFM. The processed data frame DAFM is output to the transmission / reception unit 1611 via the channel Ch3 having the frequency f3.

  Then, the transmitting / receiving unit 1611 demodulates the data frame DAFM received via the channel unit 1612 and transmits it to the upper layer.

  The MAC module 17 of the wireless device 11 extracts the frequency setting information FQIF1 stored in the frame body of the data frame DAFM, and transmits the extracted frequency setting information FQIF1 to the IP module 19 via the LLC module 18. The IP module 19 of the wireless device 11 receives the frequency setting information FQIF1 from the MAC module 17, and the received frequency setting information FQIF1 = [wireless device 1 → f1 → wireless device 6 → f2 → wireless device 9 → f3 → wireless device]. 11], it is detected that the wireless device 11 should perform wireless communication with the wireless device 9 at the frequency f3 (step S24).

  Then, the IP module 19 of the wireless device 11 selects the frequency f3 to be selected as the frequency fx from the range of the frequencies f1 to f14, generates the frequency selection signal FQSL1 for selecting the frequency f3, and sends it to the wireless interface module 16 The data is output to the transmission / reception unit 1611 and the BPF 1613 of the included communication unit 161.

  The transmission / reception unit 1611 exchanges signals with the BPF 1613 via the channel Ch3 having the frequency f3 based on the frequency selection signal FQSL1, and the BPF 1613 passes only the signal having the frequency f3 to the channel unit 1612 or the antenna 11A.

  Thereafter, the wireless device 1 that is the transmission source, the wireless device 11 that is the transmission destination, and the wireless devices 6 and 9 that are the repeaters perform wireless communication with adjacent wireless devices at different frequencies (step S25).

  That is, the wireless device 6 performs wireless communication with the wireless device 1 at the frequency f1, and performs wireless communication with the wireless device 9 at the frequency f2. Further, the wireless device 9 performs wireless communication with the wireless device 6 at the frequency f2, and performs wireless communication with the wireless device 11 at the frequency f3.

  As a result, the wireless device 6 can simultaneously receive the data frame DAFM from the wireless device 1 and transmit the data frame DAFM to the wireless device 9, and the wireless device 9 can receive the data frame DAFM from the wireless device 6. And the transmission of the data frame DAFM to the wireless device 11 can be performed simultaneously. That is, the wireless devices 1, 6, 9, and 11 can perform wireless communication at the same time, and the throughput is improved.

Therefore, in the present invention, based on the routing table 20 (see FIG. 12) indicating the absolute position of each wireless device, a route in which the communication distance between adjacent wireless devices matches the specific communication distance _rds is excluded, Based on the degree of stability of the route, which is the total metric number, a more stable route is selected to establish a wireless communication route from the transmission source to the transmission destination (see FIGS. 22 and 23), and on the established wireless communication route Since existing wireless devices 1, 6, 9, and 11 transmit and receive data using mutually different frequencies f1 to f3, throughput is established by establishing a more stable wireless communication path and wireless communication using different frequencies. Can be dramatically improved compared to conventional ad hoc networks.

  In this case, the wireless devices 6 and 9 that are repeaters respectively transmit data to the wireless devices 9 and 11 at the frequency fj while receiving data from the wireless devices 1 and 6 at the frequency fi, respectively. That is, the wireless devices 6 and 9 perform reception and transmission at the same time. However, since the antenna 11A is an omnidirectional antenna, it is not possible to simultaneously transmit and receive two pieces of data having different frequencies using one antenna 11A. Is possible.

  FIG. 25 is a conceptual diagram showing a state of wireless communication in the wireless network system 100 shown in FIG. FIG. 26 is another conceptual diagram showing a state of wireless communication in the wireless network system 100 shown in FIG. When the wireless device 1 is performing wireless communication with the wireless device 11, the wireless device 9 transmits a route request packet RREQ 2 for performing wireless communication between the wireless device 8 and the wireless device 10 from the wireless device 8. Upon reception, the routing daemon 24 of the wireless device 9 receives the priority PROT1 stored in the priority flag of the data frame DAFM wirelessly communicated between the wireless device 1 and the wireless device 11, and the priority flag of the route request packet RREQ2. Is compared with the priority PROT2 stored in.

  When the priority PROT1 is equal to or higher than the priority PROT2, the routing daemon 24 of the wireless device 9 gives priority to wireless communication between the wireless device 1 and the wireless device 11, and performs wireless communication between the wireless device 8 and the wireless device 10. I refuse. That is, the routing daemon 24 of the wireless device 9 sets the wireless interface module 16, the MAC module 17, the LLC module 18, the IP module 19 and the TCP module 21 so as to relay wireless communication between the wireless device 6 and the wireless device 11. Control MESG1 that rejects wireless communication between the wireless device 8 and the wireless device 10, and information INFO1 (= wireless device 1-) of the wireless device that is performing wireless communication between the wireless device 1 and the wireless device 11. An instruction signal INST1 instructing to generate and transmit the wireless device 6 to the wireless device 9 to the wireless device 11) is generated and transmitted to the IP module 19.

  The IP module 19 of the wireless device 9 generates a notification MESG1 in response to the instruction signal INST1 from the routing daemon 24, and refers to the routing table 20 to obtain information INFO1 (= wireless device 1-wireless device 6-wireless device 9). Generate a wireless device 11); Then, the IP module 19 transmits the notification MESG1 and the information INFO1 (= wireless device 1-wireless device 6-wireless device 9-wireless device 11) to the wireless device 8 via the LLC module 18 or the like.

  The wireless interface module 16, the MAC module 17, the LLC module 18, the IP module 19, and the TCP module 21 relay wireless communication between the wireless device 1 and the wireless device 11.

  The routing daemon 24 of the wireless device 8 receives the notification MESG1 from the wireless device 9, and the IP module 19 receives the information INFO1 (= wireless device 1-wireless device 6-wireless device 9-wireless device 11) from the wireless device 9. To do. Then, the routing daemon 24 of the wireless device 8 controls the IP module 19 so as to determine another route according to the notification MESG1. The IP module 19 of the wireless device 8 determines another route for performing wireless communication with the wireless device 10 according to the control from the routing daemon 24 by the following method.

That is, in the IP module 19 of the wireless device 8, the wireless devices 1, 6, 9, and 11 are “BUSY” based on the information INFO1 (= wireless device 1−wireless device 6−wireless device 9−wireless device 11). And the route passing through the wireless devices 1, 6, 9, 11 is excluded from the route for performing wireless communication with the wireless device 10. Then, IP module 19 of the wireless device 8, by referring to the routing table 20, from among the routes the communication distance between the wireless device does not match a specific communication distance _{r ds,} the wireless device 12,15,14,13 The route (= wireless device 8-wireless device 12-wireless device 15-wireless device 14-wireless device 13-wireless device 10) is determined as a new route for wireless communication with the wireless device 10.

  Then, the wireless device 8 communicates with the wireless device 10 via a route including the wireless device 8 -the wireless device 12 -the wireless device 15 -the wireless device 14 -the wireless device 13 -the wireless device 10 according to the flowcharts in FIGS. The wireless communication path is established between the wireless device 10 and the wireless device 10 via a route including the wireless device 8 -the wireless device 12 -the wireless device 15 -the wireless device 14 -the wireless device 13 -the wireless device 10 according to the flowchart shown in FIG. Wireless communication is performed (see FIG. 25).

  On the other hand, when the priority PROT1 is lower than the priority PROT2, the routing daemon 24 of the wireless device 9 gives priority to the wireless communication between the wireless device 8 and the wireless device 10, and between the wireless device 1 and the wireless device 11. Deny wireless communication. That is, the routing daemon 24 of the wireless device 9 sets the wireless interface module 16, the MAC module 17, the LLC module 18, the IP module 19 and the TCP module 21 so as to relay wireless communication between the wireless device 8 and the wireless device 10. The control MESG2 that rejects wireless communication between the wireless device 1 and the wireless device 11 and the information INFO2 of the wireless device that performs wireless communication between the wireless device 8 and the wireless device 10 (= wireless device 8−wireless device) 9-wireless device 10) is generated and an instruction signal INST2 instructing transmission to wireless device 1 is generated and transmitted to IP module 19.

  The IP module 19 of the wireless device 9 generates a notification MESG2 in response to the instruction signal INST2 from the routing daemon 24, and refers to the routing table 20 to obtain information INFO2 (= wireless device 8-wireless device 9-wireless device 10). ) Is generated. Then, the IP module 19 transmits the notification MESG2 and the information INFO2 (= wireless device 8-wireless device 9-wireless device 10) to the wireless device 1 via the LLC module 18 or the like.

  In addition, the wireless interface module 16, the MAC module 17, the LLC module 18, the IP module 19, and the TCP module 21 relay the route request packet RREQ 2 from the wireless device 8 to the wireless device 10. Then, the routing daemon 24 of the wireless device 10 receives the route request packet RREQ2 from the wireless device 8, generates a route reply packet RREP2 according to the route request packet RREQ2, and transmits the route response packet RREP2 to the wireless device 8.

  The wireless device 9 relays the route reply packet RREP2 from the wireless device 10 to the wireless device 8, and the wireless device 8 receives the route reply packet RREP2 from the wireless device 10. As a result, a wireless communication path consisting of the wireless device 8 -the wireless device 9 -the wireless device 10 is established between the wireless device 8 and the wireless device 10, and the wireless device 8 communicates with the wireless device 10 according to the flowchart shown in FIG. Wireless communication between them.

  On the other hand, the routing daemon 24 of the wireless device 1 receives the notification MESG2 from the wireless device 9, and the IP module 19 receives information INFO2 (= wireless device 8-wireless device 9-wireless device 10) from the wireless device 9. Then, the routing daemon 24 of the wireless device 1 controls the IP module 19 so as to determine another route according to the notification MESG2. The IP module 19 of the wireless device 1 determines another route for performing wireless communication with the wireless device 11 according to the control from the routing daemon 24 by the following method.

That is, the IP module 19 of the wireless device 1 detects that the wireless devices 8, 9, and 10 are “BUSY” based on the information INFO2 (= wireless device 8−wireless device 9−wireless device 10), and wirelessly. Routes passing through the wireless devices 8, 9, 10 are excluded from the routes for performing wireless communication with the device 11. Then, the IP module 19 of the wireless device 1 refers to the routing table 20 and selects the wireless devices 2, 5, 7, and 12 from the routes where the communication distance between the wireless devices does not match the specific communication distance r _ds. The route (= wireless device 1 -wireless device 2 -wireless device 5 -wireless device 7 -wireless device 12 -wireless device 11) is determined as a new route for wireless communication with the wireless device 11.

  Then, the wireless device 1 communicates with the wireless device 11 via a route including the wireless device 1 -the wireless device 2 -the wireless device 5 -the wireless device 7 -the wireless device 12 -the wireless device 11 according to the flowcharts in FIGS. The wireless communication path is established between the wireless device 11 and the wireless device 11 via a route including the wireless device 1 -the wireless device 2 -the wireless device 5 -the wireless device 7 -the wireless device 12 -the wireless device 11 according to the flowchart shown in FIG. Wireless communication is performed (see FIG. 26).

  Thereby, in the wireless network system 100, the wireless communication between the wireless device 1 and the wireless device 11 and the wireless communication between the wireless device 8 and the wireless device 10 can be performed simultaneously. Throughput can be improved.

  In the operation of the wireless device 9 described above, wireless communication is performed between the wireless device 1 and the wireless device 11, but the wireless device 9 relays wireless communication between the wireless device 6 and the wireless device 11. It is done at a timing that is not.

  As described above, when wireless communication is performed on the route rt1 including the wireless device 1-wireless device 6-wireless device 9-wireless device 11, wireless communication is performed on the route rt1 from the wireless device 8 outside the route rt1. When the communication request is transmitted to the existing wireless device 9, the wireless device 9 is based on the data priority PROT1 in the already performed wireless communication and the data priority PROT2 in the newly requested wireless communication. Among the two wireless communications, the two wireless communications are adjusted so that one of the higher priority wireless communications is performed and the other wireless communication is performed through another route.

  Then, the wireless device 9 transmits information of all wireless devices performing one wireless communication to the transmission source of the other wireless communication as information for newly establishing another route when performing the other wireless communication. To do. As a result, the transmission source of the other wireless communication can reliably and quickly construct another route for performing the other wireless communication.

  In this way, the wireless device 9 has information (INFO1 = wireless device 1−wireless device 6−wireless device 9−wireless device 11 or INFO2 = wireless device 8−wireless device 9−) of all wireless devices performing one wireless communication. The wireless device 10) is transmitted to the transmission source (wireless device 8 or wireless device 1). This is because the wireless device 9 is a routing composed of the absolute positions of the other wireless devices 1 to 8, 10 to 15 with respect to the wireless device 9. This is because the table 20 is held.

  In other words, the routing table created according to the conventional routing protocol includes “number of hops” to the transmission destination and “neighboring wireless device” existing in the direction of the transmission destination, but between the transmission source and the transmission destination. The information INFO1 and INFO2 cannot be transmitted to the transmission source as in the wireless device 9 described above because the information of all the wireless devices involved in the wireless communication is not included.

  However, since each of the wireless devices 1 to 15 according to the present invention holds the routing table 20 including the absolute positions of all the other wireless devices with respect to itself, the information INFO1 and INFO2 are created like the wireless device 9. Can be sent to the sender.

  In the above description, when wireless communication is performed between the wireless device 1 and the wireless device 11 on the route rt1 including the wireless device 1 -the wireless device 6 -the wireless device 9 -the wireless device 11, this wireless communication is performed. The case where a new communication request is made from the wireless device 8 outside the route rt1 to the wireless device 9 that relays the wireless communication device 9 has been described, but the present invention is not limited to this, and the wireless communication transmission source (wireless device 1) on the route rt1 Or, when there is a new communication request from the wireless device 8 outside the route rt1 to the transmission destination (wireless device 11), the two wireless communications are adjusted by the same operation as described above, and the two wireless communications are separated. This is done via a route.

  FIG. 27 is a flowchart for explaining the operation when there is a request for the second wireless communication during the execution of the first wireless communication.

  First, the first wireless communication in which the priority of the data is the priority PROT1 is performed on the route rt1 including the wireless device 1-wireless device 6-wireless device 9-wireless device 11 (step S31). Then, the second wireless communication is requested from the wireless device 8 outside the route rt1 to the wireless device 9 (step S32). In this case, the second wireless communication is wireless communication in which the priority of data is the priority PROT2 in the route including the wireless device 8 -the wireless device 9 -the wireless device 10.

  Then, the routing daemon 24 of the wireless device 9 extracts the priority PROT1 and the priority PROT2, and determines whether or not the priority PROT1 is equal to or higher than the priority PROT2 (step S33).

  When the priority PROT1 is equal to or higher than the priority PROT2, the routing daemon 24 of the wireless device 9 maintains the first wireless communication so that the wireless interface module 16, the MAC module 17, the LLC module 18, the IP module 19, and A notification MESG1 that controls the TCP module 21 and rejects the second wireless communication, and information INFO1 of all the wireless devices involved in the first wireless communication (= wireless device 1-wireless device 6-wireless device 9-wireless Device 11) is generated and an instruction signal INST1 for instructing transmission to the wireless device 8 is generated and output to the IP module 19.

  The IP module 19 of the wireless device 9 generates a notification MESG1 in response to the instruction signal INST1, and refers to the routing table 20 to obtain information INFO1 (= wireless device 1-wireless device 6-wireless device 9-wireless device 11). Is generated. Then, the IP module 19 of the wireless device 9 transmits the notification MESG1 and the information INFO1 to the wireless device 8 (step S34).

  Based on the notification MESG1, the information INFO1, and the routing table 20, the wireless device 8 performs a new route (= wireless device 8-wireless device 12-wireless device 15-wireless device 14-wireless device 13-wireless device by the method described above. 10) is established (step S35), and wireless communication is performed with the transmission destination (wireless device 10) via the established new route (step S36).

  On the other hand, when it is determined in step S33 that the priority PROT1 is lower than the priority PROT2, the routing daemon 24 of the wireless device 9 performs the second wireless communication so that the wireless interface module 16, the MAC module 17, Controls the LLC module 18, the IP module 19 and the TCP module 21 and rejects the first wireless communication, the notification MESG2, and the information INFO2 (= wireless device 8-wireless) of all wireless devices involved in the second wireless communication. Device 9-wireless device 10) is generated and an instruction signal INST2 instructing transmission to the wireless device 1 is generated and output to the IP module 19.

  Then, the wireless interface module 16, the MAC module 17, the LLC module 18, the IP module 19, and the TCP module 21 of the wireless device 9 relay the route request packet RREQ2 from the wireless device 8 to the wireless device 10, and the wireless device 10 The route request packet RREQ2 is received. Then, the wireless device 10 generates a route reply packet RREP2 and transmits it to the wireless device 8, and the wireless device 9 relays the route reply packet RREP2 to the wireless device 8. The wireless device 8 receives the route reply packet RREP2 from the wireless device 10, and a wireless communication path is established between the wireless device 8 and the wireless device 10. Thereafter, the wireless device 8 performs wireless communication with the wireless device 10 via the established wireless communication path (step S37).

  Subsequently, the wireless device 1 makes a new route (wireless device 1 -wireless device) by the above-described method based on the notification MESG2, information INFO2 (= wireless device 8-wireless device 9-wireless device 10) and the routing table 20. 2-wireless device 5-wireless device 7-wireless device 12-wireless device 11) is established (step S38), and wireless communication is performed with the wireless device 11 via the established new path (step S39). .

  And a series of operation | movement is complete | finished after step S36 or step S39.

  In the above description, the wireless device 9 transmits the information INFO1 and INFO2 of all wireless devices involved in the permitted wireless communication to the transmission source of the rejected wireless communication. However, in the present invention, Not limited to this, the wireless device 9 creates route information indicating a wireless communication route for rejected wireless communication with reference to the routing table 20, and sends the created route information to the rejected wireless communication. You may make it transmit to the origin.

  That is, when the priority PROT1 is equal to or higher than the priority PROT2, the IP module 19 of the wireless device 9 has path information = [wireless device 8−wireless device 12−wireless device 15−wireless device 14−wireless device 13−wireless device 10]. ] And the created route information = [wireless device 8−wireless device 12−wireless device 15−wireless device 14−wireless device 13−wireless device 10] is transmitted to the wireless device 8. In addition, when the priority PROT1 is lower than the priority PROT2, the IP module 19 of the wireless device 9 has a path information = [wireless device 1−wireless device 2−wireless device 5−wireless device 7−wireless device 12−wireless device 11]. ] And the created route information = [wireless device 1−wireless device 2−wireless device 5−wireless device 7−wireless device 12−wireless device 11] is transmitted to the wireless device 1.

  As a result, the transmission source of the rejected wireless communication can quickly establish a new route for performing wireless communication with the transmission destination based on the route information transmitted from the wireless device 9. Wireless communication can be realized at an early stage. As a result, the throughput in the wireless network system 100 can be improved.

  In the above, when the wireless device 1 as the transmission source transmits the data frame DAFM to the wireless device 11 as the transmission destination, the frequency setting information FQIF1 = [wireless device 1 → f1 → wireless device 6 → f2 → wireless] Device 9 → f3 → wireless device 11] has been described as being stored in the frame body of the data frame DAFM and transmitted. However, in the present invention, the wireless device 1 that is the transmission source is not limited to this, and the frequency setting information FQIF1 = [Wireless device 1 → f1 → Wireless device 6 → f2 → Wireless device 9 → f3 → Wireless device 11] may be transmitted when a route from the transmission source to the transmission destination is established (FIGS. 22 and 23).

  In this case, instead of the route information = [wireless device 1 → wireless device 6 → wireless device 9 → wireless device 11], frequency setting information FQIF1 = [wireless device 1 → f1 → wireless device 6 → f2 → wireless device 9 → f3 → Wireless device 11] is stored in the route request packet RREQ1 and transmitted.

  As a result, when the path from the transmission source to the transmission destination is established, the frequencies f1 to f3 to be used by the wireless devices 1, 6, 9, and 11 are notified to the wireless devices 1, 6, 9, and 11, respectively. In addition, when transmitting the data frame DAFM, the wireless devices 1, 6, 9, and 11 perform wireless communication at mutually different frequencies, so that wireless communication with improved throughput can be performed quickly.

  Further, in the above description, when the priority PROT1 is equal to or higher than the priority PROT2, the wireless device 9 is connected to all the wireless devices (wireless device 1-wireless device 6-wireless device 9- Although it has been described that information on the wireless device 11) is transmitted to a new wireless communication transmission source (wireless device 8), the present invention is not limited to this, and the wireless device 9 includes the wireless devices 1, 6, 9, 11 may be transmitted to a new wireless communication transmission source (wireless device 8) including frequency information used by the wireless communication device 11. That is, the wireless device 9 transmits [wireless device 1 → f1 → wireless device 6 → f2 → wireless device 9 → f3 → wireless device 11] to a new wireless communication transmission source (wireless device 8). Good.

  As a result, the wireless device 8 can perform new wireless communication with the wireless device 10 excluding the frequencies used in [wireless device 1-wireless device 6-wireless device 9-wireless device 11]. Wireless communication in [wireless device 1-wireless device 6-wireless device 9-wireless device 11] and wireless communication in [wireless device 8-wireless device 12-wireless device 15-wireless device 14-wireless device 13-wireless device 10]. Can suppress interference. As a result, the throughput in the wireless network system 100 can be improved.

  Further, in the above description, the FSR-MS protocol, that is, the protocol that establishes a route from the transmission source to the transmission destination by placing a weight on the total metric number indicating the degree of stability of the route, is used in the present invention. The frequency setting information FQIF1 is transmitted even when a path from the transmission source to the transmission destination is established using the conventional FSR protocol, and a plurality of wireless devices from the transmission source to the transmission destination have different frequencies. Wireless communication may be performed using

When the FSR protocol is used, the route from the transmission source to the transmission destination is determined based on the metric, that is, the number of hops, and a route with relatively weak received signal strength may be selected. A wireless communication path from a transmission source to a transmission destination is established by excluding a route whose communication distance between the wireless devices to be matched with a specific communication distance r _ds , and a plurality of wireless devices from the transmission source to the transmission destination are different from each other By performing wireless communication at a frequency, a plurality of wireless devices can stably perform wireless communication almost simultaneously, so that throughput can be improved compared to conventional ad hoc networks.

  When the FSR protocol is used, the contents of the link state packet LSP are the contents obtained by deleting the link metrics 1 to N from the contents shown in FIG. Accordingly, each wireless device is based on the neighboring terminal information received from the neighboring wireless device every 5 seconds and the neighboring terminal information received from the wireless device farther than the neighboring wireless device every 15 seconds. A routing table in which “link metric values m1 to m32” are deleted from the routing table 20 shown in FIG.

Furthermore, in the above, when data is transmitted from the transmission source (wireless device 1) to the transmission destination (wireless device 11), the wireless devices 1, 6, 9, and 11 wirelessly use different frequencies f1 to f3. Although it has been described that communication is performed, the present invention is not limited to this, and the wireless devices 1, 6, 9, and 11 may perform wireless communication at the same frequency. In this case, the wireless devices 1, 6, 9, and 11 cannot simultaneously perform wireless communication, but the route of the wireless device 1 → the wireless device 6 → the wireless device 9 → the wireless device 11 is a communication between adjacent wireless devices. Since the route includes a route that does not match the specific communication distance r _ds (= a route that does not block wireless communication), data retransmission can be avoided as much as possible, and data can be stably transmitted to the transmission destination. As a result, throughput can be improved.

  Furthermore, in the present invention, each of the wireless devices 1 to 15 may transmit the link state packet LSP at a different frequency. As a result, the number of link state packets LSP that can be transmitted at the same time can be increased compared to the case where the wireless devices 1 to 15 transmit link state packets LSP at the same frequency. The routing table 20 (see FIG. 12) in which the position is plotted can be quickly created.

  That is, when each of the wireless devices 1 to 15 transmits the link state packet LSP at the same frequency, the wireless device 1 cannot simultaneously receive the link state packet LSP from the adjacent wireless devices 2 and 3, but the wireless devices 2 and 3 If the link state packet LSP is transmitted at a frequency different from each other, the wireless device 1 can simultaneously receive the link state packet LSP from the wireless devices 2 and 3, so that the routing table 20 can be created more quickly.

  Further, when each wireless device 1-15 transmits the link state packet LSP at the same frequency, the wireless device 1 transmits the link state from the wireless device 2 or the like (= adjacent wireless device) every short period (about 5 seconds). Although the packet LSP and the link state packet LSP from the wireless device 8 etc. (= non-adjacent wireless device) every long period (about 15 seconds) cannot be received simultaneously, the wireless devices 2 and 8 are in link states at different frequencies. If the packet LSP is transmitted, the wireless device 1 can simultaneously receive the link state packet LSP from the wireless devices 2 and 8, so that the routing table 20 can be created quickly.

  Since the radio waves that can be simultaneously received by the antenna 11A are two radio waves having different frequencies, the number of link state packets LSP that can be simultaneously received by the wireless device 1 is limited to two. If the number is more than 2, the wireless device 1 can receive two or more link state packets LSP at the same time, so that the routing table 20 can be created more quickly.

  In this manner, the routing table 20 can be quickly created by transmitting the link state packet LSP at different frequencies from the wireless devices 1 to 15.

  In the present invention, the routing table 20 constitutes “absolute position information” indicating the absolute positions of a plurality of wireless devices with respect to a certain wireless device.

  Further, since the Internet layer of the communication control unit 15A stores the routing table 20, it constitutes “position information storage means” for storing absolute position information.

  Further, since the routing daemon 24 creates the routing table 20, it constitutes “location information creating means”.

  The wireless interface module 16, the MAC module 17, the LLC module 18, the IP module 19, the TCP module 21, and the routing daemon 24 perform wireless communication of one of the first and second wireless communication based on the absolute position information. "Communication means".

  Further, the IP module 19 constitutes “notification means”.

  The routing daemon 24 that selects the wireless communication to be executed as requested based on the priorities PROT1 and PROT2 constitutes “selection means”.

  Further, the IP module 19 and the communication unit 161 constitute a “first communication unit”, and the IP module 19 and the communication unit 162 constitute a “second communication unit”.

[Embodiment 2]
FIG. 28 is a schematic block diagram illustrating a configuration of radio apparatuses 1 to 15 according to the second embodiment. In the second embodiment, each of radio apparatuses 1 to 15 shown in FIG. 1 includes radio apparatus 1A shown in FIG. The wireless device 1A is, for example, a mobile terminal device such as a wireless device mounted on an automobile. Therefore, in Embodiment 2, each of radio devices 1 to 15 includes a mobile terminal device.

  The wireless device 1A replaces the wireless interface module 16, the IP module 19, the routing table 20, and the routing daemon 24 of the wireless device 1 shown in FIG. 2 with the wireless interface module 16A, the IP module 19A, the routing table 20A, and the routing daemon 24A, respectively. Others are the same as those of the wireless device 1.

  The wireless interface module 16A measures the moving speed of the wireless device 1A and transmits the measured moving speed to the routing daemon 24A. The radio interface module 16A performs the same functions as the radio interface module 16 in other respects.

  When the wireless device on which the IP module 19A is mounted is a transmission source, the IP module 19A refers to the routing table 20A, determines a route to the transmission destination by a method described later, and sends an IP packet along the determined route. Send to destination.

  The IP module 19A performs the same functions as the IP module 19 in other respects.

  The routing daemon 24A creates the routing table 20A by a method described later based on the received electric field strength, distance, azimuth angle, and moving speed received from the wireless interface module 16A.

  The routing daemon 24A performs the same functions as the routing daemon 24.

  FIG. 29 is a schematic block diagram showing the configuration of the wireless interface module 16A shown in FIG. The wireless interface module 16 </ b> A includes communication units 161 and 162, a distance / azimuth measuring unit 167, and a speed sensor 168.

  The communication units 161 and 162 are as described above.

  The distance / azimuth angle measurement unit 167 measures the distance and azimuth angle between two adjacent wireless devices by a method described later, and transmits the measured distance and azimuth angle to the routing daemon 24A.

  The speed sensor 168 measures the moving speed of the wireless device on which the speed sensor 168 is mounted by a method described later, and transmits the measured moving speed to the routing daemon 24A.

  FIG. 30 is a schematic block diagram showing the configuration of the distance / azimuth measuring unit 167 shown in FIG. Distance / azimuth measuring unit 167 includes circulator 1670, directivity control unit 1680, data packet transmission / reception unit 1690, traffic monitor unit 1730, and line control unit 1740.

  The circulator 1670 outputs the packet received by the antenna 11A to the data packet transmission / reception unit 1690, and outputs the packet from the data packet transmission / reception unit 1690 to the antenna 11A.

  The directivity control unit 1680 changes the direction of the main beam of the sector pattern (see beam patterns BPM1 to BPM12 shown in FIG. 15) by electrical control, for example, every 30 degrees in a range from 0 degrees to 330 degrees. The antenna 11A is controlled as possible.

  Data packet transmission / reception unit 1690 performs data packet transmission processing and reception processing.

  The traffic monitor unit 1730 executes azimuth measurement processing, determines a communication channel to be used in packet communication with another wireless device, and sets a communication channel spreading code corresponding to the determined communication channel. The data is sent to the data packet transmitting / receiving unit 1690 via the control unit 1740.

  The line control unit 1740 exchanges data and the like between the data packet transmission / reception unit 1690 and the traffic monitoring unit 1730 or between an upper layer such as the MAC module 17 and the data packet transmission / reception unit 1690. The line control unit 1740 controls each unit in the distance / azimuth measuring unit 167.

  Data packet transmitter / receiver 1690 includes a data packet receiver 1700, a spread code generator 1710, and a data packet transmitter 1720. Data packet receiver 1700 receives the received signal received by antenna 11A via circulator 1670, amplifies and demodulates the received signal, and outputs the amplified signal to the upper layer.

  The spread code generator 1710 receives the communication channel spread code from the traffic monitor unit 1730 via the line control unit 1740 and, based on the received communication channel spread code, is designated CDMA (Code Division Multiple Access). Generate a spreading code of the scheme. Then, spreading code generator 1710 outputs the generated spreading code to data packet receiver 1700 and data packet transmitter 1720.

  Data packet transmitter 1720 receives data from the upper layer, modulates and amplifies the received data, and outputs the modulated data to antenna 11A via circulator 1670.

  The data packet reception unit 1700 includes a high frequency receiver 1701, a demodulator 1702, and a reception buffer memory 1703. The data packet transmission unit 1720 includes a transmission timing control unit 1721, a transmission buffer memory 1722, a modulator 1723, and a high frequency transmitter 1724.

  The traffic monitor unit 1730 includes a management control unit 1731, a search engine 1732, an update engine 1733, and a database memory 1734.

  High frequency receiver 1701 amplifies the received signal input from antenna 11A via circulator 1670 with low noise, and outputs the amplified received signal to demodulator 1702.

  Demodulator 1702 receives the spread code from spreading code generator 1710, despreads the received signal by the spread code received, demodulates the received signal, and outputs the demodulated data to receive buffer memory 1703.

  The reception buffer memory 1703 temporarily holds the demodulated data, and then outputs the demodulated data to the upper layer and the traffic monitor unit 1730.

  The transmission timing control unit 1721 controls the output timing of the data stored in the transmission buffer memory 1722 to the modulator 1723 according to the control from the line control unit 1740.

  The transmission buffer memory 1722 temporarily holds data received from the upper layer, and outputs the data to the modulator 1723 in synchronization with the output timing controlled by the transmission timing control unit 1721.

  The modulator 1723 spreads the carrier wave having a predetermined radio frequency by the spread code from the spread code generator 1710, modulates the spread spectrum carrier wave with the data, generates a modulated signal, and generates the modulated signal. Is output to the high-frequency transmitter 1724.

  The high frequency transmitter 1724 amplifies the modulated signal, and supplies the amplified modulated signal to the antenna 11A via the circulator 1670.

  The database memory 1734 stores an AS table, a routing table, and information indicating a relationship between an electric field strength and an azimuth angle with respect to a signal-to-interference noise power ratio (SINR; Signal to Inference and Noise Ratio).

  The AS table is a table indicating the SINR (Angle SINR Table).

  The management control unit 1731 exchanges data and the like between the search engine 1732 and update engine 1733 and the line control unit 1740. In addition, the management control unit 1731 controls the search engine 1732 and the update engine 1733.

  The search engine 1732 searches the data in the database memory 1734 according to the control from the management control unit 1731, and provides the searched predetermined data to the management control unit 1731.

  The update engine 1733 updates data in the database memory 1734 according to control from the management control unit 1731.

  The distance / azimuth measuring unit 167 measures in advance SINRs for other radio devices (other stations) for each predetermined azimuth angle centered on the radio device (own station) on which the distance / azimuth is mounted. An AS table indicating SINR is created. Then, the distance / azimuth measuring unit 167 measures a rough azimuth based on the created AS table, and further performs a monopulse process (to be described later) based on the AS table to measure a detailed azimuth. .

  Note that the measurement of the distance between two adjacent wireless devices is performed based on the detailed azimuth angle measured by monopulse processing described later.

[Measurement method of distance / azimuth]
First, the procedure for measuring the azimuth will be described.

  FIG. 31 is an explanatory diagram showing a procedure for measuring an azimuth angle. In FIG. 31, the case where the azimuth angles of the wireless devices 2, 3, 6 are measured will be described with reference to the wireless device 1 shown in FIG.

  First, the distance / azimuth angle measurement unit 167 of the wireless device 1 performs carrier sense according to the CSMA / CS (Carrier Sense Multiple Access Collision Aviation) method, and transmits the first setup signal in an omni pattern as the omni pattern. , 6 to notify the start of the approximate azimuth measurement process.

  Next, the distance / azimuth angle measurement unit 167 of each of the wireless devices 2, 3, and 6 receives the first setup signal. Thereafter, the distance / azimuth measuring unit 167 of the wireless device 1 transmits twelve first request signals (hereinafter referred to as “RQ1 signals”) in a sector pattern of 30 degrees from 0 degrees to 330 degrees. To do. When the distance / azimuth measuring unit 167 of the wireless devices 2, 3, 6 receives 12 RQ1 signals transmitted from the wireless device 1 in an omni pattern, measures the received electric field strength, and receives the RQ1 signal BER (Bit Error Rate) is measured, and the received electric field strength is converted into SINR.

  Subsequently, the distance / azimuth measuring unit 167 of the wireless devices 2, 3, 6 performs data sensing and returns data indicating SINR during a period in which the carriers are not detected sequentially (hereinafter referred to as “RE signal”). To the wireless device 1 in a sector pattern.

  The distance / azimuth measuring unit 167 of the wireless device 1 creates an AS table based on the RE signals received from the wireless devices 2, 3, and 6. The created AS table is stored in the database memory 1734.

  The distance / azimuth measuring unit 167 of each of the wireless devices 2, 3, 6 creates an AS table by the same method as the distance / azimuth measuring unit 167 of the wireless device 1 with reference to itself.

  FIG. 32 is an explanatory diagram showing an example of the AS table stored in the database memory 1734 shown in FIG. The AS table stores the SINR values in the radio apparatuses 2, 3 and 6 that have received the directional beam from the radio apparatus 1 in association with the beam angle. In FIG. 32, the portion where the SINR value is not described indicates that it is below the measurement limit, and the unit of SINR is dB.

  Hereinafter, as an example, a case where a detailed azimuth angle of the wireless device 2 is measured by an AS table and then a detailed azimuth angle is measured by monopulse processing described later will be described.

  Among 12 SINRs for 12 sector patterns in the wireless device 2, the maximum value is detected, and the angle of the beam corresponding to the detected maximum value is the approximate azimuth angle of the wireless device 2 with respect to the wireless device 1 It becomes.

  In this case, the maximum value of SINR is 2.3 dB, and the angle of the beam corresponding to 2.3 dB is 90 degrees. Therefore, the approximate azimuth angle of the wireless apparatus 2 with respect to the wireless apparatus 1 is 90 degrees. .

  Thereafter, monopulse processing is performed. The monopulse processing refers to processing for measuring a detailed azimuth angle by using the received electric field strength based on the sector pattern.

  The distance / azimuth angle measurement unit 167 of the wireless device 1 performs the carrier sense by the CSMA / CS method, and transmits the second setup signal with the omni pattern during the period when the carrier is not sequentially detected. By transmitting to, the start of detailed azimuth measurement processing is notified.

  After that, the distance / azimuth measuring unit 167 of the wireless device 1 transmits a second request signal (hereinafter referred to as “RQ2 signal”) to the wireless devices 2, 3, 6 in an omni pattern.

  FIG. 33 is a schematic diagram showing sector patterns in three directions output from the wireless device. As shown in FIG. 33, the distance / azimuth measuring unit 167 of each of the wireless devices 2, 3 and 6 includes a sector pattern (hereinafter referred to as “central sector”) with respect to the wireless device 1 determined from the AS table held by each. RQ2 signal is received by the sector pattern (hereinafter referred to as “left sector pattern” and “right sector pattern”) in directions rotated 30 degrees on both sides from the central sector pattern. The received field strength of the received RQ2 signal is measured.

  The distance / azimuth angle measuring unit 167 of each of the wireless devices 2, 3, 6 uses the same method as the distance / azimuth angle measuring unit 167 of the wireless device 1 with reference to the RQ2 signal received from another wireless device. Measure the received field strength.

  Thereafter, a first process for measuring a detailed azimuth angle using the received electric field strength by the central sector pattern and the received electric field strength by the right sector pattern, the received electric field strength by the central sector pattern, and the received electric field by the left sector pattern And a second process of measuring a detailed azimuth angle using the intensity.

  FIG. 34 is a schematic diagram showing received electric field strengths by two adjacent sector patterns. In FIG. 34, the vertical axis represents the received electric field strength, and the horizontal axis represents the azimuth angle. A curve indicating each received electric field intensity (hereinafter referred to as “electric field intensity pattern”) has a fan shape.

  FIG. 35 is a schematic diagram showing a sum pattern and a difference pattern. FIG. 36 is a schematic diagram showing a normalization pattern calculated by dividing the difference pattern by the sum pattern.

  As shown in FIG. 35, the distance / azimuth measuring unit 167 includes an electric field intensity pattern (hereinafter referred to as “sum pattern”) composed of the sum of the two electric field intensity patterns described above and the two electric field intensity patterns described above. An electric field intensity pattern (hereinafter referred to as “difference pattern”) composed of the difference is calculated.

  Then, as shown in FIG. 36, the distance / azimuth measuring unit 167 calculates the normalized pattern by dividing the difference pattern by the sum pattern. The sum pattern, the difference pattern, and the normalization pattern are stored in the database memory 1734.

  Thereafter, the distance / azimuth measuring unit 167 calculates a linear approximation formula by linearly approximating the calculated normalization pattern. In this case, the slope a of the linear approximation formula is calculated and stored in the database memory 1734.

  Subsequently, the distance / azimuth measuring unit 167 obtains the received electric field strength of the wireless device 2 based on the right sector pattern and the center sector pattern. The reception field strength of the wireless device 2 based on the right sector pattern is L, and the reception field strength of the wireless device 2 based on the center sector pattern is R.

  Then, the above-described linear approximation formula is as follows.

(R−L) / (R + L) = a × θ (11)
From Expression (11), the azimuth angle θ is as follows.

θ = (R−L) / {a × (R + L)} (12)
The database memory 1734 stores 12 field intensity pattern inclinations a corresponding to 12 sector patterns from 0 degrees to 330 degrees. Therefore, the azimuth angle θ can be calculated by acquiring the electric field strengths L and R and substituting the acquired electric field strengths L and R and the inclination a stored in the database memory 1734 into the equation (12).

  When the azimuth angle θ is measured, the distance between two adjacent wireless devices is measured based on the measured azimuth angle θ. FIG. 37 is an explanatory diagram showing a method for measuring the distance between two adjacent wireless devices.

  In the following, for example, a case where the distance between the wireless device 1 and the wireless device 2 is measured will be described. A line segment connecting the wireless device 1 and the wireless device 2 is represented by V. The wireless device 1 is assumed to move along a straight line U indicating the traveling direction. Here, the wireless device 1 after moving along the straight line U is defined as a wireless device 1a.

  Let r be the moving distance of the wireless device 1 along the straight line U. The moving distance r is calculated by multiplying the moving speed and the moving time of the wireless device 1 by the traffic monitor unit 1730. The moving speed is detected by the speed sensor 168, and the moving time is set to the AS table update period.

  A line segment connecting the wireless device 1a and the wireless device 2 is W, and the length of this line segment is d1. This length d1 corresponds to the distance between the wireless device 1a and the wireless device 2.

In addition, an angle formed by the straight line U and the line segment V is θ _0, and an angle formed by the straight line U and the line segment W is θ ₁ . In this case, the angle formed by the line segment V and the line segment W is θ ₁ −θ ₀ .

Here, the angles θ ₀ and θ ₁ are angles measured by monopulse processing based on the above-described AS table.

  Then, the relationship shown by the following equation is established by the cosine theorem.

d1 · sin (θ ₁ −θ ₀ ) = r · sin (θ ₀ ) (13)
From equation (13), the distance d1 between the wireless device 1a and the wireless device 2 is calculated by the following equation.

d1 = r · sin (θ ₀ ) / sin (θ ₁ −θ ₀ ) (14)
It is assumed that the wireless device 2 is stationary while the wireless device 1 moves the moving distance r, or is moving at a speed sufficiently slower than the moving speed of the wireless device 1.

  The distance / azimuth angle measurement unit 167 measures the distance and azimuth angle between two adjacent wireless devices by the method described above, and transmits the measured distance and azimuth angle to the routing daemon 24A.

  The distance / azimuth measuring unit 167 measures a distance between the wireless device after movement and the adjacent wireless device when the wireless device is moving. Therefore, the distance / azimuth angle measurement unit 167 is particularly suitable for measuring the distance and azimuth angle between two adjacent wireless devices in a wireless network constituted by moving wireless devices.

  The speed sensor 168 includes a speedometer and an azimuth meter. The speed sensor 168 detects a moving speed of a wireless device (a wireless device mounted in an automobile) on which the speed sensor is mounted by the speedometer. The moving direction is detected by an azimuth meter. Then, the speed sensor 168 transmits a moving speed composed of speed and direction to the routing daemon 24A. Thus, in the present invention, the moving speed is a vector quantity composed of a magnitude and a direction.

  FIG. 38 is a content diagram of the link state packet in the second embodiment. The link state packet LLSP in the second embodiment is obtained by adding moving speeds 1 to N to each of the adjacent terminal information IFT1, IFT2,... Of the link state packet LSP (see FIG. 10) in the first embodiment. The others are the same as those of the link state packet LSP.

  Accordingly, each of the wireless devices 1 to 15 receives the link state packet LLSP from the adjacent wireless device every short period (about 5 seconds) and from a wireless device farther than the adjacent wireless device for a long time (about 15 seconds). Each time the link state packet LLSP is received, the routing table 20A is created based on the received link state packet LLSP.

  FIG. 39 is a diagram showing an example of the routing table 20A shown in FIG. A method by which the wireless device 1 that is a transmission source creates the routing table 20A will be described.

  When the routing daemon 24A of the wireless device 1 receives the link state packet LLSP from the wireless devices 2 to 15, the routing daemon 24A and the routing daemon 24, based on the distances 1 to N and the azimuth angles 1 to N included in the link state packet LLSP, By the same method, the absolute positions of the wireless devices 2 to 15 with respect to the wireless device 1 are plotted on the x and y coordinates, and link metric values m1 to m32 are displayed between the wireless devices. That is, the routing daemon 24A of the wireless device 1 creates the routing table 20 based on the link state packet LLSP received from the wireless devices 2-15.

  Thereafter, the routing daemon 24A of the wireless device 1 receives the moving speed v1 of the wireless device 1 detected by the speed sensor 168 of the wireless device 1 from the speed sensor 168, and uses the received moving speed v1 as the absolute position of the wireless device 1. Displays a vector at the indicated coordinates.

  Subsequently, the routing daemon 24A of the wireless device 1 detects the moving speeds 1 to N (v2 to v15) included in the link state packet LLSP received from the wireless devices 2 to 15, and the detected moving speed 1 ˜N (v2 to v15) are displayed as vectors in coordinates indicating the absolute positions of the corresponding wireless devices 2 to 15.

  In this case, the routing daemon 24A of the wireless device 1 displays the length of the moving speeds v1 to v15 so as to indicate the moving speed.

  In this way, the routing daemon 24A of the wireless device 1 determines the absolute position of the wireless devices 2 to 15 relative to the wireless device 1 and the link between the wireless devices based on the link state packet LLSP received from the wireless devices 2 to 15. A routing table 20A including metric values m1 to m32 and moving speeds v1 to v15 at which the wireless devices 1 to 15 move is created. In this case, the absolute positions of the wireless devices 2 to 15 with respect to the wireless device 1 indicate the current positions of the wireless devices 2 to 15 with respect to the wireless device 1.

  The routing daemon 24A of the wireless devices 2 to 15 creates the routing table 20A by the same method as the routing daemon 24A of the wireless device 1.

  The operation when the wireless communication path is established between the wireless device 1 as the transmission source and the wireless device 11 as the transmission destination is basically executed according to the flowcharts shown in FIGS.

In this case, the IP module 19A of the wireless device 1 that is the transmission source refers to the routing table 20A, calculates the communication distance between the wireless devices based on the current positions of the wireless devices 2 to 15, and the specific communication distance. Rather than excluding a route having a communication distance matching r _ds , the absolute position after each wireless device 2-15 has moved is determined based on the current position of wireless devices 2-15 and moving speeds v2-v15. calculated, based on the calculated absolute position excludes a path having a communication distance that match a specific communication distance r _ds calculates the communication distance between the wireless devices.

Then, when the IP module 19A of the wireless device 1 excludes a route having a communication distance that matches the specific communication distance r _ds , the IP module 19A is more stable as a route to the wireless device 11 that is the transmission destination by the same method as the IP module 19. The route request packet RREQ1 received from the routing daemon 24A is transmitted along the determined route.

In this case, when the IP module 19A of the wireless device 1 determines to transmit the route request packet RREQ1 along the route of the wireless device 1 → the wireless device 6 → the wireless device 9 → the wireless device 11, it relays the route request packet RREQ1. IP module 19A of the wireless device 6 and 9, coincides in time of receiving a route request packet RREQ1, among paths between the wireless device to be relayed route request packet RREQ1, communication distance to a specific communication distance _{r ds} And a route for relaying the route request packet RREQ1 is determined.

For example, the IP module 19A of the wireless device 6 should relay the route request packet RREQ1 to the wireless device 9 according to the route information included in the route request packet RREQ1, but the wireless device 6 and 9 after the movement When the communication distance between the device 6 and the wireless device 9 matches the specific communication distance r _ds , the route passing through the wireless device 5 is selected and the route request packet RREQ1 is relayed to the wireless device 5.

In this case, the IP module 19A of the wireless device 6 determines that the communication distance between the wireless device 6 and the wireless device 5 after the movement of the wireless devices 6 and 5 does not match the specific communication distance _rds. Then, instead of the wireless device 9, the second condition is that the link metric value m9 is the minimum, and the third condition is that the number of hops to the wireless device 11 that is the transmission destination is the minimum. The wireless device 5 that relays the route request packet RREQ1 is selected.

  The communication operation between the transmission source and the transmission destination after the wireless communication path is established between the transmission source wireless device 1 and the transmission destination wireless device 11 is basically shown in FIG. It is executed according to the flowchart.

However, the IP module 19A of the wireless devices 6 and 9 that relays wireless communication between the transmission source and the transmission destination is also in this case when the communication distance with the original relay destination matches the specific communication distance _rds. Then, another relay destination is selected by the method described above and the data is relayed to the wireless device 15.

Note that in the above, the communication distance between the wireless devices expected by the current position and the traveling speed if it matches certain communication distance r _ds, selects a path that the communication distance does not match a specific communication distance r _ds Description However, the present invention is not limited to this, and each radio apparatus may change the frequency or the directivity of the antenna 11A so that the communication distance to the original relay destination does not become the specific communication distance _rds .

The communication distance that matches the specific communication distance r _ds is determined by Expression (10). If the directivity of the antenna 11A is changed, the directivity gain D _d of the direct wave transmission / reception antenna included in Expression (10) is determined. And the directivity gain D _r of the indirect wave transmitting / receiving antenna can be changed, so that the propagation distance r _{d of the} direct wave calculated according to the equation (10) does not coincide with the specific communication distance r _ds .

Further, by changing the frequency, it is possible to change the radio waves of wavelength lambda and k = 2π / λ included in the formula (10), wherein the propagation distance r _d of the direct wave which is calculated specific according (10) It can be made not to correspond to the communication distance _rds .

Therefore, in the present invention, when the communication distance with the original relay destination matches the specific communication distance r _ds , each wireless device does not match the specific communication distance r _ds with the original communication destination. In this way, the frequency of the radio wave to be transmitted or the directivity of the antenna 11A may be changed.

  As described above, when wireless communication is performed between the wireless device 1 and the wireless device 11 in the route including the wireless device 1 -the wireless device 6 -the wireless device 9 -the wireless device 11 based on the routing table 20A. When a request for wireless communication between the wireless device 8 and the wireless device 10 is transmitted from the wireless device 8 to the wireless device 9, the two wireless communications are adjusted according to the flowchart shown in FIG. A new route is established so that

In this case, the new route is calculated based on the routing table 20A after the movement of each wireless device, and based on the calculated moved position, the communication distance between the wireless devices is calculated. The communication distance between the wireless devices is determined so as not to match the specific communication distance _rds .

  Others are the same as in the first embodiment.

As described above, in the second embodiment, the routing daemon 24A of each wireless device uses the link state packet LLSP including the communication distance between the wireless devices, the azimuth angle in which each wireless device exists, and the moving speed of each wireless device. The routing table 20A including the current position of each wireless device, the moving speed of each wireless device, and the link metric value between the wireless devices is created, and the IP module 19A of each wireless device is created. Based on the routing table 20A, the absolute position after each wireless device has moved is predicted, wireless communication is performed by excluding a route in which the communication distance between the wireless devices matches the specific communication distance _rds , and 2 It is characterized in that one wireless communication is adjusted according to priority and a wireless communication path is established so that two wireless communications can be executed simultaneously. .

With this feature, even when the wireless ad hoc network is configured by mobile terminal devices, in the wireless network system 100, a plurality of wireless communications can be performed by excluding a route whose communication distance matches the specific communication distance _rds. Can be done at the same time. As a result, the throughput can be improved in the wireless network system 100 configured by mobile terminal devices.

  In the first and second embodiments described above, it has been described that a plurality of wireless devices perform wireless communication simultaneously by changing the frequency used by each wireless device. However, the present invention is not limited to this, A plurality of wireless devices may simultaneously perform wireless communication by changing the polarization of radio waves emitted by the wireless devices.

  In the present invention, the routing table 20A constitutes “absolute position information” indicating the absolute positions of a plurality of wireless devices with respect to a certain wireless device.

  Further, since the Internet layer of the communication control unit 15A stores the routing table 20A, it constitutes “position information storage means” for storing absolute position information.

  Furthermore, since the routing daemon 24A creates the routing table 20A, it constitutes “location information creating means”.

  The radio interface module 16A, the MAC module 17, the LLC module 18, the IP module 19A, the TCP module 21, and the routing daemon 24A perform either one of the first and second radio communications based on the absolute position information. "Communication means".

  Further, the IP module 19A constitutes “notification means”.

  The routing daemon 24A that selects the wireless communication to be executed as requested based on the priorities PROT1 and PROT2 constitutes “selection means”.

  Furthermore, the IP module 19A and the communication unit 161 constitute a “first communication unit”, and the IP module 19A and the communication unit 162 constitute a “second communication unit”.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and is intended to include meanings equivalent to the scope of claims for patent and all modifications within the scope.

  The present invention is applied to a wireless device that is constructed autonomously and that constitutes a wireless network that performs a plurality of wireless communications while suppressing a decrease in throughput.

1 is a schematic diagram of a wireless network system according to an embodiment of the present invention. FIG. 2 is a schematic block diagram illustrating a configuration of the wireless device illustrated in FIG. 1 according to the first embodiment. FIG. 3 is a schematic block diagram showing a configuration of the wireless interface module shown in FIG. 2 in the first embodiment. It is a schematic block diagram which shows the structure of the communication part shown in FIG. It is a 1st schematic block diagram which shows the structure of the distance measurement part shown in FIG. It is a 2nd schematic block diagram which shows the structure of the distance measurement part shown in FIG. It is a schematic block diagram which shows the structure of the azimuth angle measurement part shown in FIG. It is a block diagram of an IP header. It is a block diagram of a TCP header. It is a content figure of a link state packet. It is a block diagram of a link state packet and a data frame. It is a figure which shows the example of the routing table shown in FIG. It is a figure for demonstrating the method to measure the distance between two adjacent radio | wireless apparatuses. FIG. 3 is a conceptual diagram in which a plurality of wireless devices existing on a wireless communication path from a transmission source to a transmission destination each measure a distance between adjacent wireless devices. It is a top view of the beam pattern radiated | emitted from the antenna shown in FIG. It is a 1st content figure of the link state packet which the radio | wireless apparatus of a transmission source receives. It is a 2nd content figure of the link state packet which the radio | wireless apparatus of a transmission source receives. It is a 3rd content figure of the link state packet which the radio | wireless apparatus of a transmission source receives. It is a 4th content figure of the link state packet which the radio | wireless apparatus of a transmission source receives. It is a figure which shows the relationship between the reception power and distance in a multipath environment. It is a figure which shows the relationship between the absolute value | Γ | of a reflection coefficient, phase delay (PHI), and incident angle (theta) i. It is a flowchart for demonstrating the operation | movement which establishes a radio | wireless communication path between a transmission source and a transmission destination. It is a flowchart for demonstrating the detailed operation | movement in step S2, S4 shown in FIG. It is a flowchart for demonstrating the radio | wireless communication operation | movement between a transmission source and a transmission destination. It is a conceptual diagram which shows the state of the radio | wireless communication in the radio | wireless network system shown in FIG. It is another conceptual diagram which shows the state of the radio | wireless communication in the radio | wireless network system shown in FIG. It is a flowchart for demonstrating operation | movement when there exists a request | requirement of 2nd radio | wireless communication during execution of 1st radio | wireless communication. 6 is a schematic block diagram illustrating a configuration of a wireless device in a second embodiment. FIG. FIG. 29 is a schematic block diagram showing a configuration of a wireless interface module shown in FIG. 28. FIG. FIG. 30 is a schematic block diagram showing a configuration of a distance / azimuth measuring unit shown in FIG. 29. It is explanatory drawing which shows the procedure which measures an azimuth. FIG. 31 is an explanatory diagram showing an example of an AS table stored in the database memory shown in FIG. 30. It is a schematic diagram which shows the sector pattern of 3 directions output from a radio | wireless apparatus. It is a schematic diagram which shows the received electric field strength by two adjacent sector patterns. It is a schematic diagram which shows a sum pattern and a difference pattern. It is a schematic diagram which shows the normalization pattern computed by dividing a difference pattern by a sum pattern. It is explanatory drawing which shows the method of measuring the distance between two adjacent radio | wireless apparatuses. FIG. 10 is a content diagram of a link state packet in the second embodiment. It is a figure which shows the example of the routing table shown in FIG.

Explanation of symbols

  1 to 15, 1A wireless device, 100 wireless network system, 11A antenna, 12A input unit, 13A display unit, 14A e-mail application, 15A communication control unit, 16, 16A wireless interface module, 17 MAC module, 18 LLC module, 19 , 19A IP module, 20, 20A routing table, 21 TCP module, 22 UDP module, 23 SMTP module, 24, 24A routing daemon, 30 space, 161, 162 communication unit, 163, 163A, 163B distance measurement unit, 164 azimuth angle Measuring unit, 167 Distance / azimuth measuring unit, 168 Speed sensor, 1611, 1621, 1672 Transmitting / receiving unit, 1612, 1622 Channel unit, 1613, 1623, 1633 1636, 1645, 1651 to 165k BPF, 1631 input section, 1632, 1635, 1663, 1648, 1661 amplifier, 1634 modulator, 1637 power amplifier, 1638 reference oscillator, 1639, 1649 power distributor, 1640, 1642, 1647 PLL oscillator , 1641 Power combiner, 1643 control unit, 1644 low noise amplifier, 1646 demodulator, 1660 phase detector, 1662 processing unit, 1670 circulator, 1671 control unit, 1673, 1680 Directivity control unit, 1673 azimuth angle detection unit, 1690 Data packet transmission / reception unit, 1700 data packet reception unit, 1701 high frequency receiver, 1702 demodulator, 1703 reception buffer memory, 1710 spread code generator, 1720 data packet transmission unit , 1721 transmission timing control unit, 1722 transmission buffer memory, 1723 modulator, 1724 high frequency transmitter, 1730 traffic monitor unit, 1731 management control unit, 1732 search engine, 1733 update engine, 1734 database memory, 1740 line control unit.

Claims (8)

A wireless device that is autonomously established and constitutes a wireless network in which wireless communication is performed between a transmission source and a transmission destination,
Position information storage means for storing absolute position information indicating absolute positions of the other wireless devices constituting the wireless network with respect to the wireless device;
There is a request for second wireless communication from the second transmission source to the second transmission destination when the first wireless communication is performed between the first transmission source and the first transmission destination. Communication means for performing wireless communication of any one of the first and second wireless communication based on the absolute position information;
Based on the absolute position information, information on all wireless devices performing the one wireless communication is extracted, and the information on all the extracted wireless devices is the other of the first and second wireless communication. And a notifying means for notifying the transmission source of the wireless communication. When there is a request for the second wireless communication, a priority is high between the first data transmitted in the first wireless communication and the second data transmitted in the second wireless communication. Further comprising a selection means for selecting the wireless communication to which data is transmitted as the one wireless communication,
The communication means performs wireless communication selected by the selection means based on the absolute position information,
2. The wireless device according to claim 1, wherein the notification unit receives a selection result by the selection unit and notifies the information regarding all the wireless devices to a transmission source of the other wireless communication. A wireless device that is autonomously established and constitutes a wireless network in which wireless communication is performed between a transmission source and a transmission destination,
Position information storage means for storing absolute position information indicating absolute positions of the other wireless devices constituting the wireless network with respect to the wireless device;
There is a request for second wireless communication from the second transmission source to the second transmission destination when the first wireless communication is performed between the first transmission source and the first transmission destination. Communication means for performing wireless communication of any one of the first and second wireless communication based on the absolute position information;
Based on the absolute position information, route information for performing the other wireless communication of the first and second wireless communication is extracted, and the extracted route information is notified to the transmission source of the other wireless communication. A wireless device.   Based on the absolute position information, the communication unit is configured to transmit the one wireless communication via a path that is a communication distance other than a specific communication distance that leads to a cutoff of wireless communication between the wireless device and an adjacent wireless device. The wireless device according to any one of claims 1 to 3, wherein: The communication means includes
First communication means for communicating at a first frequency with a first wireless device adjacent to the wireless device in the direction of the transmission source of the one wireless communication;
5. The apparatus according to claim 4, further comprising: a second wireless device adjacent to the wireless device in a direction of a transmission destination of the one wireless communication and a second communication unit that communicates at a second frequency different from the first frequency. The wireless device described. A wireless device that is autonomously established and constitutes a wireless network in which wireless communication is performed between a transmission source and a transmission destination,
Position information storage means for storing absolute position information indicating absolute positions of the other wireless devices constituting the wireless network with respect to the wireless device;
Communication for determining a first route for performing wireless communication between the wireless device and the transmission destination based on the absolute position information, and performing the wireless communication along the determined first route Communication request means for transmitting a request to the destination;
After the transmission of the communication request, a first notification for notifying the prohibition of the wireless communication and a second notification for notifying all the wireless devices involved in the wireless communication already performed on the second route are the second notification. 3 for performing the wireless communication up to the destination by avoiding all the wireless devices specified by the second notification based on the absolute position information. Route determination means for determining the route of
A wireless device comprising: communication means for performing wireless communication with the transmission destination along the determined third route.   The route determination means selects a route in which the communication distance between adjacent wireless devices is a communication distance other than a specific communication distance that leads to the interruption of wireless communication based on the absolute position information, and selects the third route. The wireless device according to claim 6, wherein the wireless device is determined. A frequency generation means for generating frequency setting information for setting a frequency used by all the wireless devices constituting the third path;
The communication means transmits the frequency setting information to all wireless devices constituting the third path,
The frequency setting information is set so that a first frequency used for data transmission and a second frequency used for reception of the data are different from each other for all the wireless devices constituting the third path. The radio apparatus according to claim 6 or 7, which is information.

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