JP2010057062A - Wireless device and transmission control method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wireless device and a transmission control method thereof, which suppresses interference caused by multipath and secures communication quality, even if waves transmitted from a plurality of antennas are received as a countermeasure against shadowing. <P>SOLUTION: A wireless device 10 demodulates radio waves 22 and 32 received via a receiver 16 from each of antennas 12 and 14 into a packet, extracts information which this packet includes, counts communication parties for each antenna, determines the number of successive transmission times, determines the transmission order 72 of radio waves based on a measured counting 40, a counting not shown in the figure, and the number of successive transmission times 42, generates the packet storing the transmission data generated by a transmitter 18 and the peculiar identification information of the device 10 according to the number of successive transmission times 42, switches the packet to a supply destination according to the transmission order 72, transmits transmission signals 22 and 32 subjected to modulation of the supplied packets from the antennas 12 and 14 respectively. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a radio apparatus and a transmission control method thereof, and the radio apparatus according to the present invention particularly relates to inter-vehicle communication in which shadowing in a transmission packet of the own vehicle is generated by the own vehicle or another vehicle. The transmission control method relates to a control method for transmitting a packet in response to reception of the packet in inter-vehicle communication, for example.

  In inter-vehicle communication in which information is exchanged between vehicles by wireless communication, there is a case where communication performance of a packet transmitted from the own vehicle to the other vehicle is deteriorated due to shielding of the vehicle body of the own vehicle or the other vehicle.

  Briefly describe the occurrence of shadowing. When the vehicle that transmits the packet is a large vehicle, the body of the transmitting vehicle interferes with the communication between vehicles, and the direct wave communication from the transmitting vehicle cannot be performed, so that the performance of the vehicle-to-vehicle communication is substantially deteriorated. There is a receiving vehicle area. As a conventional technique for solving such a shadowing problem, there is Patent Document 1.

Patent Document 1 is an in-vehicle communication device in which a transmission signal for wireless transmission is supplied to two in-vehicle antennas, and the transmission signal is transmitted as a radio wave from each in-vehicle antenna to a receiving vehicle. Therefore, if patent document 1 is applied and an in-vehicle antenna is installed in a different position, the electric wave transmitted from at least one in-vehicle antenna can reach a receiving vehicle. Since the receiving vehicle can receive the arrived radio wave and demodulate the packet supplied from the transmitting vehicle, this in-vehicle communication device can be expected to reduce the communication performance degradation area.
Japanese Unexamined Patent Publication No. 2000-269871

  However, the actual communication environment is in a multipath environment due to a reflected wave from a building or the like. For this reason, even in the packet transmission control method using Patent Document 1, the communication performance deteriorates. The cause of the deterioration is that the interference wave due to the multipath generated in this environment interferes with the direct wave to reduce the reception power or generate the frequency selective fading. In particular, in the in-vehicle communication device of Patent Document 1, when the radio wave of the packet bus transmitted from one antenna is a direct wave, the direct wave is transmitted from the other antenna provided for shadowing countermeasures. Communication performance deteriorates due to interference of radio waves in the packet path.

  In view of such problems, the present invention provides a radio apparatus and a transmission control method therefor that can suppress interference due to multipath and ensure communication quality even when receiving transmission waves from a plurality of antennas as a countermeasure against shadowing. For the purpose.

  In order to solve the above-described problem, the present invention provides a wireless device provided with a plurality of antennas that communicate with surrounding movable bodies, the device including a receiving unit that receives a transmitted radio wave as a received radio wave. The transmission means and the reception means for transmitting as a transmission radio wave to the surroundings demodulate the reception radio wave into a packet, extract unique identification information included in the demodulated packet, count the type of extracted unique identification information, and continuously transmit First receiving means for determining the number of times, the received radio wave is demodulated into packets, unique identification information included in the demodulated packets is extracted, the types of extracted unique identification information are counted, and the first receiving means obtains Second transmission means for determining the transmission order of transmission radio waves based on the count and the number of continuous transmissions. The transmission means includes first transmission means having first modulation means for modulating a packet to be transmitted, and a transmission packet. Second transmission means having second modulation means for modulating the network, the first transmission means generates data to be transmitted, generates unique identification information in the apparatus, and data and unique identification information in the apparatus Is generated according to the number of consecutive transmissions, and the generated packet is switched to the first modulation means and the second modulation means as the supply destination according to the transmission order, and the supplied packet is modulated and transmitted. The signal is generated, and the second transmission means switches and modulates the supplied packet to generate a transmission signal.

  Further, in order to solve the above-described problems, the present invention provides a wireless device provided with a plurality of antennas that communicate with surrounding movable bodies, the device receiving a transmitted radio wave as a received radio wave. Means, transmitting means for transmitting as a transmitted radio wave to the surroundings, and a receiving means, a first receiving means for demodulating the received radio wave into packets, counting the number of packets demodulated within a predetermined time, and determining the number of continuous transmissions; Second, the received radio wave is demodulated into packets, the number of packets demodulated within a predetermined time is counted, and the transmission order of the transmitted radio waves is determined based on the number of packets and the number of continuous transmissions obtained by the first receiving means. Receiving means, and the transmitting means includes first transmitting means having first modulating means for modulating a packet to be transmitted, and second transmitting means having second modulating means for modulating the packet to be transmitted, Transmission means Generate data to be transmitted, generate unique identification information in this device, generate a packet storing the data and unique identification information in this device according to the number of consecutive transmissions, and generate the generated packet according to the transmission order The first modulation means and the second modulation means, which are the supply destinations, are switched to generate a transmission signal by modulating the supplied packet, and the second transmission means is switched to modulate the supplied packet to transmit the transmission signal. Is generated.

  Furthermore, in order to solve the above-mentioned problems, the present invention provides a wireless device provided with a plurality of antennas that communicate with surrounding movable bodies, in which the device receives a received radio wave as a received radio wave. A first receiving means for demodulating the received radio wave into a packet, detecting a communication traffic amount within a predetermined time, and determining the number of continuous transmissions; Second receiving means for demodulating received radio waves into packets, detecting the amount of communication traffic within a predetermined time, and determining the transmission order of the transmitted radio waves based on the number of packets and the number of continuous transmissions obtained by the first receiving means The transmission means includes a first transmission means having a first modulation means for modulating a packet to be transmitted, and a second transmission means having a second modulation means for modulating the packet to be transmitted. Generate data to be transmitted, generate unique identification information in this device, generate a packet storing the data and unique identification information in this device according to the number of consecutive transmissions, and generate the generated packet according to the transmission order The first modulation means and the second modulation means, which are the supply destinations, are switched to generate a transmission signal by modulating the supplied packet, and the second transmission means is switched to modulate the supplied packet to transmit the transmission signal. Is generated.

  Finally, in order to solve the above-described problem, the present invention provides a transmission control method in a wireless device provided with a plurality of antennas that communicate with surrounding movable bodies, which receives a transmitted radio wave. A reception means for receiving as a radio wave and a transmission means for transmitting as a transmission radio wave in the surroundings, demodulating the received radio wave into a packet, extracting unique identification information contained in the demodulated packet within a predetermined time, A first step of counting the type of identification information and determining the number of continuous transmissions; demodulating received radio waves into packets; extracting unique identification information contained in the demodulated packets within a predetermined time; A second step of counting the type of information and determining the transmission order of transmission radio waves based on the count obtained by the first receiving means and the number of continuous transmissions; Generating unique identification information, generating a packet in which data and unique identification information in the device are stored according to the number of times of continuous transmission, and generating the generated packet according to a transmission order as a first modulation unit; A third step of switching and supplying to the second modulation means, and a fourth step of generating a transmission signal by modulating the packet in each of the first modulation means and the second modulation means. .

  According to the wireless device and the transmission control method thereof according to the present invention, the reception means demodulates the received radio wave received by each antenna into a packet, extracts information contained in the demodulated packet, and can communicate with the extracted information. Is determined for each antenna, the number of continuous transmissions is determined, the transmission order of transmission radio waves is determined based on the measured count and the number of continuous transmissions, transmission data is generated by the transmission means, and the unique identification information in this device A packet in which data and unique identification information in this device are stored is generated according to the number of times of continuous transmission, the generated packet is switched to a supply destination according to the transmission order, and the supplied packet is supplied. Transmitted from one antenna based on information received by each antenna by generating a transmission signal by modulating each and transmitting it through each antenna So as not to interfere with radio waves of the transmitted packets to the radio wave packets from the other antenna can control the transmission from the vehicle, it is possible to avoid a situation in which deterioration of communication performance occurs. Furthermore, communication quality can be ensured by controlling the transmission of a large number of packets continuously transmitted from an antenna having many receptions of communicable parties.

  Next, an embodiment of a wireless device according to the present invention will be described in detail with reference to the accompanying drawings. Referring to FIG. 1, an embodiment of a wireless device according to the present invention is a wireless device 10 in inter-vehicle communication, and the wireless device 10 receives received radio waves 22 and 32 received by antennas 12 and 14 by a receiving unit 16 in packets. The information contained in the demodulated packet is demodulated, the communication partner is counted from the extracted information for each antenna, the number of continuous transmissions is determined, the measured number 40, the number not shown, and the number of continuous transmissions, respectively. 42, the transmission order 72 of the transmission radio wave is determined, the transmission unit 18 generates transmission data, the unique identification information in the device 10 is generated, and the packet storing the data and the unique identification information in the device is stored. Generates according to the number of consecutive transmissions 42, switches the generated packet to the destination according to the transmission order 72, supplies it, modulates the supplied packet, and generates transmission signals 22 and 32 Thus, based on the information received by each antenna by transmitting through each of the antennas 12 and 14, the radio wave of the packet transmitted from the other antenna is not interfered with the radio wave of the packet transmitted from the other antenna. Thus, transmission from the host vehicle can be controlled, and a situation in which deterioration of communication performance occurs can be avoided. Furthermore, communication quality can be ensured by controlling the transmission of a large number of packets continuously transmitted from an antenna having many receptions of communicable parties.

  In the present embodiment, the wireless device of the present invention is applied to the wireless device 10 for inter-vehicle communication. The illustration and description of parts not directly related to the present invention are omitted. In the following description, the signal is indicated by the reference number of the connecting line in which it appears.

  As shown in FIG. 1, the wireless device 10 includes antennas 12 and 14, a reception unit 16, and a transmission unit 18. The antennas 12 and 14 have a function of receiving a radio wave from another vehicle and converting it into an electric signal, and a function of modulating the transmission data of the own vehicle and transmitting the supplied electric signal to the other vehicle. The antenna 12 receives an input radio wave 20 from another vehicle, converts the input radio wave 20 as a reception signal 22, and supplies the obtained reception signal 22 to the first reception unit 24. The antenna 12 converts the transmission signal 22 output from the first transmission unit 26 included in the transmission unit 18 of the host vehicle as a transmission radio wave 28 and transmits the transmission radio wave 28.

  Similarly, the antenna 14 receives an input radio wave 30 from another vehicle, converts the input radio wave 30 as a reception signal 32, and supplies the obtained reception signal 32 to the second reception unit 34. The antenna 14 converts the transmission signal 32 output from the second transmission unit 36 included in the transmission unit 18 of the host vehicle as a transmission radio wave 38 and transmits the transmission radio wave 38.

  In this embodiment, two antennas are used, but three or more antennas may be used. In this case, it is desirable that the radio apparatus 10 increase the number of constituent elements of the first receiving unit, which will be described later, in accordance with the increase in antennas.

  The receiving unit 16 has a function of extracting and demodulating a packet from the supplied reception signal, extracting ID (IDentification) information for identifying another vehicle from the demodulated packet, and determining the number of other vehicles from the extracted information. , A function for determining the number of continuous transmissions, and a function for determining the order of transmission. The receiving unit 16 includes first and second receiving units 24 and 34.

  The first receiving unit 24 has a function of extracting and demodulating a packet from the supplied reception signal, extracting ID information for identifying another vehicle from the demodulated packet, and determining the number of other vehicles from the extracted information. It has a function to detect and a function to determine the number of continuous transmissions. The first receiving unit 24 supplies the vehicle number information 40 and the continuous number of times information 42 to the second receiving unit 34, and supplies the continuous number of times information 42 to the second transmitting unit 36. As shown in FIG. 2, the first receiving unit 24 includes a demodulating unit 44, a vehicle ID information extracting unit 46, a number detecting unit 48, and a continuous transmission number determining unit 50. The second receiving unit 34 also includes a demodulating unit 52, a vehicle ID information extracting unit 54, a number detecting unit 56, and a transmission order determining unit 58, as shown in FIG.

  The demodulation unit 44 has a function of demodulating the supplied reception signal and generating a packet. The demodulation unit 44 demodulates the supplied reception signal 22, generates a packet, and sends the generated packet 60 to the vehicle ID information extraction unit 46.

  The vehicle ID information extraction unit 46 has a function of extracting the ID of another vehicle that is a transmission source from the demodulated packet. The vehicle ID information extraction unit 46 extracts the IDs of other vehicles included in the packet 60 and outputs the extracted vehicle ID information 62 to the number detection unit 48.

  The number detection unit 48 has a function of detecting the number of other vehicles that communicate based on the number of types of other vehicle IDs received within a predetermined time. The number detection unit 48 detects the number of other vehicles that communicate based on the number of types of other vehicle IDs received, and uses the detected number of other vehicles as vehicle number information 64 to determine the number of consecutive transmissions 50 and the transmission order determination unit. Supply to 58.

  The continuous transmission count determining unit 50 has a function of determining the continuous transmission count for continuous transmission. The continuous transmission number determination unit 50 outputs the determined continuous transmission number to the transmission order determination unit 58 and the second transmission unit 36 as continuous transmission number information 42.

  In the present embodiment, the continuous transmission number is a fixed value determined by the continuous transmission number determination unit 50, but not only the vehicle number information obtained within a predetermined time but also the number of packets. May be used. The number of continuous transmissions is based on the number of vehicles information 64 and 70. The communication channel availability, that is, the amount of communication traffic is estimated, and if the number of continuous transmissions is determined according to the availability, higher quality communication is possible. It becomes.

  The demodulation unit 52, the vehicle ID information extraction unit 54, and the number detection unit 56 have the functions of the demodulation unit 44, the vehicle ID information extraction unit 46, and the number detection unit 48, respectively. The demodulation unit 52 demodulates the supplied reception signal 32, generates a packet, and sends the generated packet 66 to the vehicle ID information extraction unit 54. The vehicle ID information extraction unit 54 extracts the IDs of other vehicles included in the packet 66 and outputs the extracted vehicle ID information 68 to the number detection unit 54. Then, the number detection unit 56 detects the number of other vehicles communicating based on the received number of types of other vehicle IDs, and supplies the detected number of other vehicles to the transmission order determination unit 58 as vehicle number information 70.

  The transmission order determining unit 58 determines from which antenna to transmit a plurality of continuous packets to other vehicles based on the detected two vehicle number information, the supplied continuous transmission number information, and the generated continuous transmission number information. It has the function to do. The transmission order determination unit 58 may also have a function of generating continuous transmission number information based on the vehicle number information and generating one continuous transmission number information based on a plurality of continuous transmission number information. In this case, the transmission order determining unit 58 determines from which antenna the other vehicle number information 64 and 70 is detected, and the continuous transmission packet information based on the continuous transmission count information 42 or the generated continuous transmission count information (not shown). Whether to transmit to the vehicle is determined, and the determined transmission order information 72 is output to the first transmission unit 26 of the transmission unit 18.

  Note that the transmission order is not limited to this embodiment, and is determined based on the number of vehicles communicable with each antenna, that is, the vehicle number information 64 and 70, but the total number of packets received within a predetermined time. Alternatively, the transmission order may be determined by detecting the amount of communication traffic.

  Returning to FIG. 1, the transmission unit 18 includes a function for generating transmission data and vehicle ID information, a function for including the generated information in a packet and generating a packet to be continuously transmitted, and a destination of the continuously generated packet. A function of selecting and modulating a supplied packet to generate a transmission signal; The transmission unit 18 includes first and second transmission units 26 and 36.

  As shown in FIG. 3, the first transmission unit 26 includes a transmission data generation unit 74, a vehicle ID information generation unit 76, a continuous packet generation unit 78, a transmission destination switching unit 80, and a modulation unit 82. The second transmission unit 36 in FIG. 3 includes a modulation unit 84.

  The transmission data generation unit 74 has a function of generating data to be transmitted from the own vehicle to another vehicle. The transmission data generation unit 74 transmits the generated data to the continuous packet generation unit 78 as transmission data evening 86. The vehicle ID information generation unit 76 has a function of generating ID information of the host vehicle. The vehicle ID information generation unit 76 transmits the generated vehicle ID information 88 to the continuous packet generation unit 78.

  The continuous packet generation unit 78 stores the transmission data supplied to the packet and the ID information of the own vehicle in accordance with a predetermined format, and generates a transmission packet to be continuously transmitted using the supplied continuous transmission number information. It has a function. The continuous packet generation unit 78 inputs the transmission data 86 and the vehicle ID information 66, stores these data in the packet area based on a predetermined format, generates a transmission packet, and according to the continuous transmission count information 42 The generated transmission packet 90 is output to the transmission destination switching unit 80.

  The transmission destination switching unit 80 has a function of distributing and outputting the output destination of the continuous packet according to the transmission order information supplied. The transmission destination switching unit 80 distributes the output destination of the continuous transmission packet 90 supplied according to the transmission order information 72. That is, the transmission destination switching unit 80 uses the transmission order information 72 as a switching control signal, and outputs the continuous packet 92 to the modulation unit 82 or outputs the continuous packet 94 to the modulation unit 84. Select one destination.

  Each of the modulation units 82 and 84 has a function of modulating a supplied packet to generate a transmission signal. The modulation unit 82 supplies the generated transmission signal 22 to the antenna 12. Further, the modulation unit 84 supplies the generated transmission signal 32 to the antenna 14.

  Next, the operation of the radio apparatus 10 to which the radio apparatus according to the present invention is applied will be described with reference to FIGS.

  The radio apparatus 10 starts receiving radio waves when a power switch (not shown) is turned on. Since the radio apparatus 10 of this embodiment has the two antennas 12 and 14, the first and second receiving units 24 and 34 are operated in parallel to demodulate the radio waves received by the antennas 12 and 14. Then, information on other vehicles is extracted from the demodulated packet, and vehicle number information is detected based on the extracted information (subroutine SUB). The detection of the number information by reception will be described in detail later with reference to FIG.

  Next, the number of continuous transmissions is determined based on the obtained number information (step S10). The continuous transmission number determining unit 50 of the first receiving unit 24 determines the continuous transmission number based on the supplied vehicle number information 64. The continuous transmission number determination unit 50 outputs the determined continuous transmission number to the transmission order determination unit 58 of the second reception unit 34 as continuous transmission number information 42. Further, the transmission order determination unit 58 also determines the number of continuous transmissions based on the supplied vehicle number information 70.

  Next, transmission order information is determined (step S12). The transmission order determining unit 58 determines the transmission order from three pieces of information, such as the vehicle number information 64 and 70, and the continuous transmission number information 42 determined based on the continuous transmission number information 42 or the unit number information 70, and the determined transmission. The order is output to the transmission destination switching unit 80 as transmission order information 72.

  An example of a procedure for determining the transmission order information 72 is shown. When the number of vehicles information 64 is 4, the number of vehicles information 70 is 1, and the number of times of continuous transmission 42 is 5, the transmission order determination unit 58 uses the antenna 14 for the number of other vehicles communicating via the antenna 12. It can be seen that there are more than the number of other vehicles communicating through the network. Accordingly, the transmission order determining unit 58 determines to increase the number of times of transmission from the antenna 12, and since the continuous transmission count information 42 is 5, transmission from the antenna 12 is performed for the first to fourth times in continuous transmission. It is preferable to perform transmission control so that the antenna 14 transmits the fifth time.

  Next, the transmission unit 18 generates transmission data and vehicle ID information in parallel (step S14). The first transmission unit 26 operates the transmission data generation unit 74 and the vehicle ID information generation unit 76 to supply the generated transmission data 86 and vehicle ID information 88 to the continuous packet generation unit 78.

  Next, a continuous transmission packet is generated (step S16). The packet is generated by storing each of the transmission data 86 and the vehicle ID information 88 in a storage area indicated by a predetermined format. In the continuous generation of the generated packets, only the number of continuous transmissions is generated according to the continuous transmission number transmitted continuously by the continuous packet generation unit 78, that is, the continuous transmission number information 42. The continuous packet generation unit 78 supplies the generated packet 90 to the transmission destination switching unit 80.

  Next, the continuous packet to be supplied is distributed according to the antenna which is the transmission destination (step S18). The transmission destination is one of the antennas 12 and 14 in this embodiment. The transmission destination switching unit 80 performs switching according to a switching control signal for switching the transmission destination. As a result, the supplied continuous transmission packet 90 is divided into a packet 92 sent to the modulation unit 82 and a packet 94 sent to the modulation unit 84.

  When the transmission order information 72 described above is used, the first four packets of the continuous transmission packet 90 are output to the modulation unit 82, and the last one packet is output to the modulation unit 84.

  Next, each supplied packet is modulated into a transmission signal and transmitted (step S20). The modulation unit 82 modulates the supplied packet 92 to generate the transmission signal 22, and outputs the generated transmission signal 22 to the antenna 12. Further, the modulation unit 84 modulates the supplied packet 94 to generate a transmission signal 32 and outputs the generated transmission signal 32 to the antenna 14.

  Packet transmission is controlled according to the received packet in this way, and the packet is transmitted from the host vehicle. When the transmission is finished, the transmission control is finished. In fact, it goes without saying that the end is continued after the transmission until the power switch is turned off, and then returns to the vehicle number information detection process. When returning to the vehicle number information detection process, a counter that measures time (not shown) is reset.

  Next, the vehicle number information detection process (SUB) will be described with reference to FIG. The receiving unit 16 operates the first and second receiving units 24 and 34 simultaneously and demodulates the received signals 22 and 32 supplied from the antennas 12 and 14 (substep SS10). The radio apparatus 10 operates a counter (not shown) after the start of reception. Received signals 22 and 32 are demodulated into packets from other vehicles by demodulation sections 44 and 52, respectively. Demodulation units 44 and 52 supply demodulated packets 60 and 66 to vehicle ID information extraction units 46 and 54, respectively.

  Next, vehicle ID information of another vehicle is extracted (substep SS12). The vehicle ID information extraction unit 46 extracts vehicle ID information stored in a predetermined storage area. The vehicle ID information extraction unit 46 outputs the extracted vehicle ID information 62 to the number detection unit 48. Similarly, the vehicle ID information extraction unit 54 also extracts the vehicle ID information and outputs the extracted vehicle ID information 68 to the number detection unit 56.

  Next, it is determined whether or not a predetermined time has elapsed (substep SS14). If the predetermined time has not yet elapsed (NO), the process returns to the demodulation process (to sub-step SS10). If the predetermined time has elapsed (YES), the process proceeds to the vehicle number information detection process (to sub-step SS16).

  Next, vehicle number information is detected (substep SS16). The number detection unit 48 obtains the type of the other vehicle based on the vehicle ID information 68 extracted within a predetermined time. By counting this type, the number detection unit 48 detects the number of other vehicles around the own vehicle, that is, within the communicable range. The number detection unit 56 supplies the detected number of other vehicles to the continuous transmission number determination unit 50 as vehicle number information 64. In addition, the number of other vehicles detected by the number detection unit 56 is output to the transmission order determination unit 58 as vehicle number information 70.

  After this vehicle number information detection processing, the process proceeds to return, and the extraction of information and the detection of vehicle number information based on this extraction are finished. After this end, the process proceeds to the process for determining the number of continuous transmissions in the main routine (to step S10).

  By operating in this way, based on information received by a plurality of antennas, transmission from the own vehicle so that the radio wave of the packet transmitted from one antenna does not interfere with the radio wave of the packet transmitted from the other antenna. By controlling this, it is possible to avoid a situation in which the communication performance of other vehicles deteriorates. Furthermore, communication quality with other vehicles can be ensured by performing transmission control of a large number of packets transmitted continuously from an antenna that receives a large number of other vehicles that can communicate.

It is a block diagram which shows the schematic structure in the radio | wireless apparatus for vehicle-to-vehicle communication to which the radio | wireless apparatus which concerns on this invention is applied. It is a block diagram which shows the schematic structure in the receiving part of FIG. It is a block diagram which shows the schematic structure in the transmission part of FIG. 3 is a main flowchart showing a transmission control procedure based on received information in the inter-vehicle communication wireless device of FIG. 1. FIG. 5 is a flowchart showing the operation of a subroutine for extracting information and detecting the number of other vehicles obtained upon reception in the inter-vehicle communication wireless device of FIG. 4. FIG.

Explanation of symbols

10 Radio equipment
12, 14 Antenna
16 Receiver
18 Transmitter
24 First receiver
26 First transmitter
34 Second receiver
36 Second transmitter
44, 52 Demodulator
46, 54 Vehicle ID information extractor
48, 56 Number detection unit
50 Number of times of continuous sending
58 Transmission order determination unit
74 Transmission data generator
76 Vehicle ID information generator
78 Continuous packet generator
80 Destination switching part
82, 84 Modulator

Claims (11)

In a wireless device provided with a plurality of antennas that communicate with surrounding movable bodies, the device includes:
A receiving means for receiving the transmitted radio wave as a received radio wave;
A transmission means for transmitting to the surroundings as a transmission radio wave,
The receiving means demodulates the received radio wave into packets, extracts unique identification information included in the demodulated packets, counts the types of extracted unique identification information, and determines the number of consecutive transmissions;
The received radio wave is demodulated into a packet, the unique identification information included in the demodulated packet is extracted, the type of the extracted unique identification information is counted, and based on the count obtained by the first receiving means and the number of continuous transmissions, Second receiving means for determining a transmission order of transmission radio waves,
The transmission means includes first transmission means having first modulation means for modulating a packet to be transmitted;
Second transmission means having second modulation means for modulating a packet to be transmitted,
The first transmission means generates data to be transmitted, generates unique identification information in the device, generates a packet storing the data and unique identification information in the device according to the number of consecutive transmissions, and generates The packet is switched to the first modulation means and the second modulation means that are the supply destinations according to the transmission order, and the transmission packet is generated by modulating the supplied packet,
The second transmission means switches and modulates a supplied packet to generate a transmission signal. 2. The apparatus according to claim 1, wherein the first receiving means is a demodulating means for demodulating the received radio wave into a packet;
Extraction means for extracting the unique identification information;
Counting means for counting the type of the unique information;
A radio apparatus comprising: a frequency determination means for determining the number of continuous transmissions. 2. The apparatus according to claim 1, wherein the second receiving unit is a demodulating unit that demodulates the received radio wave into a packet;
Extraction means for extracting the unique identification information;
Counting means for counting the type of the unique information;
A radio apparatus comprising: an order determination stage for determining a transmission order of transmission radio waves based on the count obtained by the first reception means, the count of the second reception means, and the number of continuous transmissions. The apparatus according to claim 1, wherein the first transmission means includes data generation means for generating data to be transmitted;
Information generating means for generating unique identification information in the device;
Continuous transmission generating means for generating a packet storing the data and unique identification information in the device according to the number of continuous transmissions;
Switching means for supplying the generated packet by switching to the first modulation means and the second modulation means in accordance with the transmission order; and
And a first modulation means for generating the transmission signal.   2. The radio apparatus according to claim 1, wherein the apparatus determines the number of continuous transmissions based on a count obtained by the first receiving means and a count of the second receiving means.   The wireless device according to claim 1, wherein the mobile body is a vehicle and is mounted on a vehicle. In a wireless device provided with a plurality of antennas that communicate with surrounding movable bodies, the device includes:
A receiving means for receiving the transmitted radio wave as a received radio wave;
A transmission means for transmitting to the surroundings as a transmission radio wave,
The receiving means demodulates the received radio wave into packets, counts the number of packets demodulated within a predetermined time, and determines the number of continuous transmissions;
The received radio wave is demodulated into packets, the number of packets demodulated within the predetermined time is counted, and the transmission order of transmission radio waves is determined based on the number of packets and the number of continuous transmissions obtained by the first receiving means. 2 receiving means,
The transmission means includes first transmission means having first modulation means for modulating a packet to be transmitted;
Second transmission means having second modulation means for modulating a packet to be transmitted,
The first transmission means generates data to be transmitted, generates unique identification information in the device, generates a packet storing the data and unique identification information in the device according to the number of consecutive transmissions, and generates The packet is switched to the first modulation means and the second modulation means that are the supply destinations according to the transmission order, and the transmission packet is generated by modulating the supplied packet,
The second transmission means switches and modulates a supplied packet to generate a transmission signal.   8. The radio apparatus according to claim 7, wherein the apparatus determines the number of continuous transmissions based on the number of packets received by the first receiving means and the number of packets received by the second receiving means. . In a wireless device provided with a plurality of antennas that communicate with surrounding movable bodies, the device includes:
A receiving means for receiving the transmitted radio wave as a received radio wave;
A transmission means for transmitting to the surroundings as a transmission radio wave,
The receiving means demodulates the received radio wave into packets, detects the amount of communication traffic within a predetermined time, and determines the number of continuous transmissions;
A second demodulator that demodulates the received radio wave into packets, detects a communication traffic amount within the predetermined time, and determines a transmission order of transmission radio waves based on the number of packets and the number of continuous transmissions obtained by the first receiving means; Receiving means,
The transmission means includes first transmission means having first modulation means for modulating a packet to be transmitted;
Second transmission means having second modulation means for modulating a packet to be transmitted,
The first transmission means generates data to be transmitted, generates unique identification information in the device, generates a packet storing the data and unique identification information in the device according to the number of consecutive transmissions, and generates The packet is switched to the first modulation means and the second modulation means that are the supply destinations according to the transmission order, and the transmission packet is generated by modulating the supplied packet,
The second transmission means switches and modulates a supplied packet to generate a transmission signal.   10. The apparatus according to claim 9, wherein the apparatus determines the number of continuous transmissions based on a communication traffic amount received by the first receiving means and a communication traffic amount received by the second receiving means. Wireless device. In a transmission control method in a wireless device provided with a plurality of antennas that communicate with surrounding movable bodies, the method includes:
A receiving means for receiving the transmitted radio wave as a received radio wave;
Transmission means for transmitting as a transmission radio wave to the surroundings,
A first step of demodulating the received radio wave into a packet, extracting unique identification information included in the demodulated packet within a predetermined time, counting the type of extracted unique identification information, and determining the number of consecutive transmissions;
The received radio wave is demodulated into packets, the unique identification information included in the demodulated packet within a predetermined time is extracted, the type of the extracted unique identification information is counted, and the count and continuous transmission obtained by the first receiving means A second step of determining a transmission order of transmission radio waves based on the number of times;
Generate data to be transmitted, generate unique identification information in the device, generate a packet storing the data and unique identification information in the device according to the number of consecutive transmissions, and place the generated packet in the transmission order In response to the third step of supplying the first modulation means and the second modulation means as the supply destination,
A transmission control method comprising: a fourth step of generating a transmission signal by modulating a packet in each of the first modulation means and the second modulation means.

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