TWI530210B - Wireless communication system, controlling method, and program - Google Patents

Description

Wireless communication system and control method, program

The present invention relates to a wireless communication system, a control method, and a program for wirelessly communicating with a vehicle traveling on a road.

The present application claims priority based on Japanese Patent Application No. 2012-035563, filed on Jan.

In ITS (Intelligent Transport Systems), as a protocol for communication systems shared by various traffic-related services including road tolls, there is a WAVE (Wireless Access in Vehicular Environments) communication protocol. . The vehicle-mounted device in the WAVE communication protocol (hereinafter referred to as WAVE) performs communication between roads and vehicles or between vehicles and vehicles. Here, as an application example of communication between a road and a vehicle, there is a road toll. In this communication, the wireless communication device installed on the road communicates with the vehicle-mounted device provided in the vehicle by the control channel, and after communicating with the control channel, communicates with the vehicle-mounted device via the service channel. In other words, the wireless communication device installed on the road communicates with the vehicle-mounted device in a manner in which the transmission/reception control period divided into the control channel is the transmission/reception control period of the service channel. Further, Patent Document 1 discloses a technique related to WAVE.

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2010-239607

However, the wireless communication device that communicates with the vehicle-mounted device by the above-described WAVE technology is, for example, configured to be associated with a plurality of lanes provided on the road and can be carried by a vehicle traveling on a corresponding lane that is directly above the lane. Communication. Figure 6 is a prior art diagram of a wireless communication system utilizing the technology of WAVE. In the figure, reference numeral 1 denotes a wireless communication device, and a wireless communication area 3 in which a radio wave transmitted from the wireless communication device 1 exists on a traffic lane corresponding to each wireless communication device 1. Therefore, if each of the wireless communication devices 1 communicates with the vehicle 2 using the control channel and the service channel at the same timing, there is a problem that a radio interference region is generated in the overlapping range of the wireless communication regions 3 of the adjacent wireless communication devices 1.

Accordingly, it is an object of the present invention to provide a wireless communication system, control method, and program that can reduce the occurrence of radio interference regions.

In order to achieve the above object, the present invention is a wireless communication system including a plurality of wireless communication devices for each of the lanes that perform wireless communication with a vehicle traveling on any one of a plurality of lanes disposed on a road. The wireless communication device sets a timing of a transmission/reception control period in which the control channel is transmitted and received with the first frequency, and a timing of a transmission/reception control period in which the service channel and the vehicle are transmitted and received at a frequency different from the first frequency. The timing of the other wireless communication devices is shifted, and is transmitted and received with the vehicle traveling on the corresponding traffic lane.

Further, in the wireless communication system of the present invention, the wireless communication device may be configured to synchronize a transmission/reception control period of the control channel with the vehicle, and a timing of a transmission/reception control period during transmission and reception of the service channel and the vehicle. And the timing of the other communication devices adjacent to each other is shifted, and is transmitted and received with the vehicle traveling on the corresponding traffic lane.

Further, in the wireless communication system of the present invention, the wireless communication device may be configured such that a timing of a transmission/reception control period in which the control channel is transmitted and received with the vehicle, and a service channel having the same frequency in the service channel at a plurality of frequencies The timing of the transmission/reception control period for transmitting and receiving with the vehicle is shifted from the timing of the adjacent first adjacent radio communication device and the timing of the second adjacent radio communication device, which is another radio communication device adjacent to the first adjacent radio communication device. And transmitting and receiving with the vehicle traveling on the corresponding lane.

Further, in the wireless communication system of the present invention, the wireless communication device may transmit and receive to the vehicle by a service channel having a frequency different from a frequency of a service channel used by another wireless communication device adjacent thereto.

Furthermore, the present invention is a method of controlling a wireless communication system having a plurality of each of the lanes for wireless communication with a vehicle traveling on any one of a plurality of lanes disposed on a road. a wireless communication device that synchronizes a transmission and reception control period in which a control channel that transmits a first frequency, that is, a control channel, and the vehicle, and a transmission and reception control period that transmits and receives a service channel that is different from the frequency of the first frequency to the vehicle The timing is shifted from the timing of other wireless communication devices, and is transmitted and received with the vehicle traveling on the corresponding lane.

Further, in the above control method of the present invention, the wireless communication device may be configured such that a timing of a transmission/reception control period in which the control channel is transmitted and received with the vehicle, and a timing of a transmission/reception control period in which the service channel and the vehicle are transmitted and received are The timing of the other wireless communication devices adjacent to each other is shifted, and is transmitted and received with the vehicle traveling on the corresponding traffic lane.

Further, in the above control method of the present invention, the wireless communication device may be configured such that a timing of a transmission/reception control period in which the control channel is transmitted and received with the vehicle, and a service channel having the same frequency in the service channel at a plurality of frequencies The timing of the transmission and reception control period during which the vehicle transmits and receives, and the time of another adjacent first adjacent wireless communication device The timing of the second adjacent radio communication device, which is another radio communication device adjacent to the first adjacent radio communication device, is shifted, and is transmitted and received with the vehicle traveling on the corresponding traffic lane.

Further, in the above control method of the present invention, the wireless communication device may transmit and receive to the vehicle by a service channel having a frequency different from a frequency of a service channel used by another wireless communication device adjacent thereto.

Further, the present invention is a program for causing a computer of a plurality of wireless communication devices for each of the above-described traffic lanes to wirelessly communicate with a vehicle traveling on any one of a plurality of lanes disposed on a road as the following mechanism The function is to synchronize the timing of the transmission and reception control period in which the first frequency is the control channel and the vehicle, and the timing of the transmission and reception control period in which the service channel and the vehicle are transmitted and received at a frequency different from the first frequency, and other The timing of the wireless communication device is shifted, and is transmitted and received with the vehicle traveling on the corresponding lane.

According to the present invention, since adjacent wireless communication devices alternately transmit wireless signals of different frequencies, it is possible to reduce radio interference regions that generate overlapping ranges of wireless communication regions.

1‧‧‧Wireless communication device

1a‧‧‧Wireless communication device

1b‧‧‧Wireless communication device

1c‧‧‧Wireless communication device

1d‧‧‧Wireless communication device

2‧‧‧ Vehicles

3‧‧‧Wireless communication area

10‧‧‧Send control device

11‧‧‧Communication Department

12‧‧‧Transmission Control Department

13‧‧‧Memory Department

50‧‧‧ roads

60‧‧‧ lanes

60a‧‧" lane

60b‧‧" lane

60c‧‧" lane

60d‧‧‧ driveway

1 is a schematic diagram of a wireless communication system.

2A is a first diagram showing transmission control of radio signals of each of the wireless communication devices.

2B is a first diagram showing transmission control of radio signals of each of the wireless communication devices.

Fig. 3 is a second diagram showing transmission control of radio signals of each of the radio communication devices.

4 is a diagram showing an outline of a synchronous operation of communication between a wireless communication device and a vehicle.

Fig. 5 is a view showing an outline of communication processing between a wireless communication device and a vehicle.

Figure 6 is a prior diagram of a wireless communication system utilizing the technology of WAVE.

Hereinafter, a wireless communication device according to an embodiment of the present invention will be described based on the drawings.

Fig. 1 is a schematic view showing a wireless communication system of the same embodiment.

In the figure, symbols 1a to 1d are wireless communication devices, symbol 2 is a vehicle, symbol 10 is a transmission control device, symbol 50 is a road, and symbols 60a to 60d are lanes. In the following description, the wireless communication devices 1a to 1d are collectively referred to as the wireless communication device 1; and, collectively, the traffic lanes 60a to 60d are the traffic lanes 60. In the wireless communication system of the present embodiment, the wireless communication devices 1a to 1d are provided directly above each of the plurality of lanes 60a to 60d provided on the road 50. The wireless communication devices 1a to 1d are communicably connected to the transmission control device 10, and based on the control of the transmission control device 10, transmit WAVE (Wireless Access in Vehicular Environments) to the traffic lanes provided at the corresponding positions on the road 50. The wireless signal specified by the communication specifications.

Furthermore, as shown in FIG. 1, the transmission control device 10 includes a communication unit 11, a transmission control unit 12, and a storage unit 13. The communication unit 11 is a processing unit that communicates with the wireless communication devices 1a to 1d. The transmission control unit 12 is a processing unit that controls the transmission timing of the wireless signals transmitted via the control channel and the service channel transmitted by the wireless communication devices 1a to 1d. The memory unit 13 stores various kinds of information for processing.

Further, in the radio communication system according to the present embodiment, based on the control of the transmission control device 10, the radio communication device 1 sets the timing of the transmission/reception control period in which the control channel of the first frequency, that is, the control channel and the vehicle-mounted device of the vehicle 2, is transmitted and received. The frequency of the first frequency, that is, the timing of the transmission and reception control period in which the service channel and the vehicle-mounted device of the vehicle 2 are transmitted and received, is shifted from the timing of the other wireless communication device, and is transmitted and received with the vehicle-mounted device of the vehicle 2 traveling on the corresponding traffic lane. .

Thereby, a wireless communication system capable of reducing a radio interference area can be provided.

2A and 2B are first views showing transmission control of radio signals of each of the wireless communication devices.

The transmission control of the wireless signal shown in FIG. 2A is an example of the case where the wireless communication device 1 performs the transmission and reception control period during the transmission and reception of the control channel and the vehicle-mounted device of the vehicle 2, and the vehicle channel of the service channel and the vehicle 2 The timing of the transmission/reception control period is shifted from the timing of the other adjacent wireless communication devices 1, and is transmitted and received with the vehicle 2 traveling on the corresponding traffic lane.

That is, in the example of FIG. 2A, the timing of each of the radio communication device 1a and the adjacent radio communication device 1b and the control channel and the service channel are shifted.

Furthermore, in the example of FIG. 2A, the timing of each of the radio communication device 1b and the adjacent radio communication devices 1a and 1c and the control channel and the service channel are shifted.

Furthermore, in the example of FIG. 2A, the timing of each of the radio communication device 1c and the adjacent radio communication devices 1b and 1d and the control channel and the service channel are shifted.

Furthermore, in the example of FIG. 2A, the timing of each of the radio communication device 1d and the adjacent radio communication device 1c and the control channel and the service channel are shifted.

Each time the transmission control is performed, the transmission control unit 12 of the transmission control device 10 reads the network address of the wireless communication devices 1a to 1d that hold the communication from the storage unit 13, and transmits an instruction to the wireless communication devices 1a to 1d to start and The communication control communication start signal of the vehicle 2 is required.

Here, the wireless communication device 1a and the wireless communication device 1c record information of the wireless signal for transmitting the service channel when the wireless signal of the control channel is transmitted when the odd number is counted, in the memory or the like. On the other hand, the wireless communication device 1b and the wireless communication device 1d record information of the wireless signal for transmitting the service channel when the wireless signal of the control channel is transmitted when the odd number is counted, and the wireless communication device 1d.

When the control unit of each of the wireless communication device 1a to the wireless communication device 1d receives the communication start request signal from the transmission control device 10, the counting is started. In addition, the time interval of counting is, for example, 20 msec. Further, when the counts of the wireless communication device 1a and the wireless communication device 1c are counted as odd counts, the control of the wireless signals of the transmission control channel is performed.

Further, when the counts of the wireless communication device 1a and the wireless communication device 1c are counted as even counts, the control of the wireless signal for transmitting the service channel is performed.

On the other hand, when the radio communication device 1b and the control unit of the radio communication device 1d count the odd number, the control unit transmits the radio signal of the transmission service channel. Further, when the counting unit of the wireless communication device 1b and the wireless communication device 1d counts the number of even counts, the control of the wireless signal of the transmission control channel is performed.

According to such processing, since the adjacent wireless communication device 1 alternately transmits wireless signals of different frequencies, it is possible to reduce the overlapping range of the wireless communication area 3 to generate a radio interference area.

Further, the transmission control unit 12 of the transmission control device 10 may determine the timing of the wireless signal of the transmission control channel of each wireless communication device 1 and the timing of the wireless signal of the transmission service channel based on the counting, and transmit each timing to the wireless each time. Communication device 1. In this case, each wireless communication device 1 sequentially transmits the wireless signals of the control channel and the wireless signals of the service channel based on the transmission timing from the transmission control device 10.

The wireless communication device 1 can also perform the wireless signal transmission control shown in FIG. 2B instead of the wireless signal transmission control shown in FIG. 2A.

The wireless signal transmission control shown in FIG. 2B is an example in which the wireless communication device 1 transmits and receives the transmission and reception control period during which the control channel and the vehicle-mounted device of the vehicle 2 are transmitted and received, and transmits and receives the service channel and the vehicle-mounted device of the vehicle 2. The timing of the transmission and reception control period is shifted from the timing of the other wireless communication device 1, and is transmitted and received with the vehicle-mounted device of the vehicle 2 traveling on the corresponding traffic lane. Further, the wireless communication device 1 shown in FIG. 2B is an example in which two wireless communication devices 1 adjacent to each other use a service channel of a different frequency to transmit and receive with a vehicle-mounted device of a vehicle 2 traveling on a corresponding traffic lane.

That is, in the example of FIG. 2B, the timing of each of the radio communication device 1a and the adjacent radio communication device 1b and the control channel and the service channel are shifted, and the frequency of the service channel used by the radio communication device 1b is used. Service channels and vehicles with different frequencies 2 car-mounted device to send and receive.

Furthermore, in the example of FIG. 2B, the timings of the radio communication devices 1b and the adjacent radio communication devices 1a and 1c and the respective control channels and the service channels are shifted, and are utilized by the radio communication devices 1a and 1c. The service channel is transmitted and received by the service channel of different frequencies and the vehicle of the vehicle 2.

Furthermore, in the example of FIG. 2B, the timings of the radio communication devices 1c and the adjacent radio communication devices 1b and 1d and the respective control channels and the service channels are shifted, and are utilized by the radio communication devices 1b and 1d. The service channel is transmitted and received by the service channel of different frequencies and the vehicle of the vehicle 2.

Furthermore, in the example of FIG. 2B, the timing of each of the radio communication device 1d and the adjacent radio communication device 1c and the control channel and the service channel are shifted, and the frequency of the service channel used by the radio communication device 1c is utilized. The service channel of different frequencies is transmitted and received with the vehicle of the vehicle 2.

When the transmission control is performed, the transmission control unit 12 of the transmission control device 10 reads the network bits of the wireless communication devices 1a to 1d that hold the communication from the storage unit 13 in the same manner as the processing shown in FIG. 2A. The address transmits a communication start request signal instructing to start communication control with the vehicle 2 to the wireless communication devices 1a to 1d.

The wireless communication device 1a and the wireless communication device 1c record information of the wireless signal for transmitting the service channel when the wireless signal of the control channel is transmitted when the odd number is counted, in the memory or the like. Furthermore, the wireless communication device 1a and the wireless communication device 1c record information indicating the frequency F1 as a service channel in a memory or the like. On the other hand, the wireless communication device 1b and the wireless communication device 1d record information of the wireless signal for transmitting the service channel when the wireless signal of the control channel is transmitted when the odd number is counted, and the wireless communication device 1d. Further, the wireless communication device 1b and the wireless communication device 1d record information indicating the frequency F2 as a service channel in a memory or the like in advance.

If the control unit of each of the wireless communication device 1a to the wireless communication device 1d transmits the control device When 10 is received to receive the communication start request signal, counting starts. In addition, the time interval of counting is, for example, 20 msec. Further, when the counts of the wireless communication device 1a and the wireless communication device 1c are counted as odd counts, the control of the wireless signals of the transmission control channel is performed.

Further, when the counts of the wireless communication device 1a and the wireless communication device 1c are counted, the control unit of the wireless communication device 1a and the wireless communication device 1c performs control of the wireless signal of the service channel having the transmission frequency F1.

On the other hand, when the radio communication device 1b and the control unit of the radio communication device 1d count the odd number, the control unit performs the control of the radio signal having the transmission frequency F2, that is, the service channel. Further, when the wireless communication device 1b and the control unit of the wireless communication device 1d count the number of even counts, the wireless communication device 1b controls the wireless signal of the transmission service channel.

According to such processing, since the adjacent wireless communication device 1 alternately transmits wireless signals of different frequencies, it is possible to reduce the overlapping range of the wireless communication area 3 to generate a radio interference area.

Fig. 3 is a second diagram showing transmission control of radio signals of each of the radio communication devices.

The wireless signal transmission control shown in FIG. 3 is an example in which the wireless communication device 1 sets the timing of the transmission and reception control period in which the control channel and the vehicle-mounted device of the vehicle 2 are transmitted and received, and the frequency in the service channel of the plurality of frequencies. The timing of the transmission and reception control period in which the service channel is transmitted and received with the vehicle-mounted device of the vehicle 2, and the timing of the adjacent first adjacent wireless communication device and the second adjacent to the other wireless communication device adjacent to the first adjacent wireless communication device The timing of the wireless communication device is shifted, and is transmitted and received with the vehicle-mounted device of the vehicle 2 traveling on the corresponding roadway.

That is, in the example of FIG. 3, the wireless communication device 1a, the wireless communication device 1b (first adjacent wireless communication device), and the wireless communication device 1c (second adjacent wireless communication device), and the control channel and the plurality of frequency service channels are provided. The timings of the transmission and reception control periods of the service channels having the same frequency are shifted, and are transmitted and received with the vehicle-mounted device of the vehicle 2.

In the example of FIG. 3, the wireless communication device 1b and the adjacent wireless communication device 1a (first adjacent wireless communication device) and the wireless communication device 1c (first adjacent wireless communication device) are provided. And the wireless communication device 1d (second adjacent wireless communication device) shifts the timing of each transmission and reception control period of the service channel having the same frequency as the control channel and the plurality of frequency service channels, and transmits and receives with the vehicle-mounted device of the vehicle 2.

In the example of FIG. 3, the wireless communication device 1c is adjacent to the adjacent wireless communication device 1b (first adjacent wireless communication device), the wireless communication device 1d (first adjacent wireless communication device), and the wireless communication device 1a (second adjacent The wireless communication device shifts the timing of each transmission and reception control period of the service channel having the same frequency as the control channel and the plurality of frequency service channels, and transmits and receives with the vehicle-mounted device of the vehicle 2.

Furthermore, in the example of FIG. 3, the wireless communication device 1d is connected to the adjacent wireless communication device 1c (first adjacent wireless communication device), the wireless communication device 1b (second adjacent wireless communication device), and the control channel and the plurality of frequencies. The timings of the transmission and reception control periods of the service channels having the same frequency in the service channel are staggered, and are transmitted and received with the vehicle-mounted device of the vehicle 2.

When the transmission control is performed, the transmission control unit 12 of the transmission control device 10 reads the wireless communication devices 1a to 1d in the communication connection from the storage unit 13 in the same manner as the processing shown in Figs. 2A and 2B. The network address transmits a communication start request signal instructing to start communication control with the vehicle 2 to the wireless communication devices 1a to 1d.

The wireless communication devices 1a and 1d previously instruct the wireless signal transmitting the control channel at the time of the first counting, the wireless signal of the service channel transmitting the frequency F1 at the second counting, and the information recording of the wireless signal of the service channel transmitting the frequency F2 at the third counting. In memory and so on.

Further, the wireless communication device 1b previously instructs the wireless signal of the service channel that transmits the frequency F2 at the first counting, the wireless signal of the control channel when the second counting is transmitted, and the wireless signal of the service channel that transmits the frequency F1 at the third counting. Recorded in memory, etc.

Furthermore, the wireless communication device 1c previously instructs the wireless signal of the service channel transmitting the frequency F1 at the first counting, the wireless signal of the service channel transmitting the frequency F2 at the second counting, and the wireless signal of the transmission control channel at the third counting. Recorded in memory, etc.

If the control unit of each of the wireless communication device 1a to the wireless communication device 1d transmits the control device When 10 is received to receive the communication start request signal, counting starts. In addition, the time interval of counting is, for example, 20 msec. Further, when the control unit of the wireless communication devices 1a and 1d performs the first counting, the control of the wireless signal of the transmission control channel is performed. Further, when the control unit of the wireless communication devices 1a and 1d performs the second counting, the wireless signal of the service channel having the transmission frequency F1 is controlled. Further, when the third communication unit of the radio communication devices 1a and 1d performs the control of the radio signal of the service channel having the transmission frequency F2. Further, the control units of the wireless communication devices 1a and 1d repeat the transmission control from the first count to the third count every time the count is performed.

Further, when the control unit of the wireless communication device 1b counts the first time, it controls the wireless signal of the service channel whose transmission frequency is F2. Further, when the control unit of the wireless communication device 1b counts the second count, it controls the wireless signal of the transmission control channel. Further, when the control unit of the wireless communication device 1b counts the third time, it controls the wireless signal of the service channel whose transmission frequency is F1. Moreover, the control unit of the wireless communication device 1b repeats the transmission control from the first count to the third count every time it counts.

Further, when the control unit of the wireless communication device 1c counts the first time, it controls the wireless signal of the service channel whose transmission frequency is F1. Further, when the control unit of the wireless communication device 1c performs the second counting, it controls the wireless signal of the service channel having the transmission frequency F2. Further, when the control unit of the wireless communication device 1c counts the third time, it controls the wireless signal of the transmission control channel. Moreover, the control unit of the wireless communication device 1c repeats the transmission control from the first count to the third count every time it counts.

In addition, the wireless communication device 1 transmits and receives the transmission and reception control period of the transmission and reception control period during which the control channel and the vehicle-mounted device of the vehicle 2 are received, and the service channel having the same frequency in the service channel of the plurality of frequencies, and the vehicle-mounted device of the vehicle 2. The timing sequence is sequentially adjacent to the timing of the adjacent wireless communication devices of other frequency types, and is transmitted and received with the vehicle-mounted device of the vehicle 2 traveling on the corresponding traffic lane.

For example, the wireless communication device 1a can also be used to control the channel with the vehicle of the vehicle 2. The timing of the receiving and receiving control period is the same as that of the service channel with the same frequency in the plurality of service channels (F1, F2, and F3) and the vehicle-mounted device of the vehicle 2. The timing of the adjacent wireless communication devices (the wireless communication devices 1b, 1c, and 1d) of the type (three types) is transmitted and received with the vehicle-mounted device of the vehicle 2 traveling on the corresponding traffic lane.

According to such processing, since the plurality of wireless communication devices 1 adjacent to each other alternately transmit wireless signals of different frequencies, the overlapping range of the wireless communication regions 3 of the plurality of wireless communication devices 1 can be reduced to generate a radio interference region. .

4 is a diagram showing an outline of a synchronous operation of communication between a wireless communication device and a vehicle.

As shown in the figure, the wireless communication device 1 repeats the transmission of the wireless signal of the control channel (CCH) and the transmission of the wireless signal of the service channel (SCH) at a specific counting time interval. The counting time interval is referred to as an interval, and in the interval of the wireless signals of each of the control channel and the service channel, a non-transmission period of a wireless signal called a guard band is provided from the start time of the interval to a specific time. On the other hand, before the vehicle 2 receives the wireless signal from the control channel transmitted by the wireless communication device 1, the reception mode of the control channel is repeated at the same interval from the wireless communication device 1. Moreover, if the vehicle enters the wireless communication area 3 of the wireless signal transmitted by the wireless communication device 1, the vehicle-mounted device of the vehicle 2 receives the wireless signal of the control channel in the receiving mode of the control channel, and repeats the service in the subsequent interval. Transmitting and receiving wireless signals of channels and control channels.

Fig. 5 is a view showing an outline of communication processing between a wireless communication device and a vehicle.

As shown in FIG. 5, the wireless communication device 1 transmits timing notification information to the vehicle 2 when the interval of the guard band is passed. The timing notification information is information for synchronizing wireless communication with the vehicle-mounted device mounted on the vehicle 2. Moreover, the wireless communication device 1 transmits a service channel (SSH) designation information and position correction information by using a control channel. The service channel designation information is used to specify the information of the required vehicle-mounted device data. Furthermore, the position correction information is used for the school. Information on the location of the vehicle.

Moreover, if the vehicle-mounted device of the vehicle 2 receives the timing notification information, the service channel designation information, and the position correction information, the vehicle-mounted device information is transmitted by the service channel after passing through the guard band during the transmission and reception control period of the service channel. When the ACK (acknowledgement reply) is not returned from the wireless communication device 1 before the transmission and reception control period of the service channel, the vehicle-mounted device transmits the vehicle-mounted device information again during the same transmission and reception control period of the service channel.

Here, if the length of the interval is too short, the ratio of the guard band period of the interval (transmission and reception control period) becomes large, and the communication speed between the wireless communication device 1 and the vehicle 2 (the amount of data transmission and reception per unit time) is caused. reduce. Therefore, the length of the interval needs to be such that after the vehicle-mounted device of the vehicle 2 receives the wireless communication using the control channel from the wireless communication device 1, the transmission and reception of the specific information of the wireless communication using the service channel can be ended in the wireless communication area 3.

Further, a computer system is provided inside the radio communication device 1, the transmission control device 10, and the vehicle-mounted device provided in the vehicle 2. Moreover, the processes of the above processes are stored in a computer-readable recording medium in the form of a program, and the program is read and executed by a computer to perform the above processing. Here, the computer-readable recording medium refers to a magnetic disk, a magneto-optical disk, a CD-ROM (Compact Disc-Read Only Memory), and a DVD-ROM (Digital Versatile Disc-Read Only). Memory, digital versatile CD-reading memory, semiconductor memory, etc. Moreover, the computer program can also be sent to the computer via the communication line, and the computer that receives the transmission can execute the program.

Furthermore, the above program may also be used to implement one of the above functions. Further, it may be a difference file (difference program) which can be realized by a combination with a program previously recorded in a computer program.

[Industrial availability]

According to an aspect of the present invention, a wireless communication system capable of reducing a radio interference area can be provided.

1a‧‧‧Wireless communication device

1b‧‧‧Wireless communication device

1c‧‧‧Wireless communication device

1d‧‧‧Wireless communication device

2‧‧‧ Vehicles

3‧‧‧Wireless communication area

10‧‧‧Send control device

11‧‧‧Communication Department

12‧‧‧Transmission Control Department

13‧‧‧Memory Department

50‧‧‧ roads

60a‧‧" lane

60b‧‧" lane

60c‧‧" lane

60d‧‧‧ driveway

Claims (7)

A wireless communication system comprising a plurality of wireless communication devices for each of said lanes for wireless communication with a vehicle traveling on any of a plurality of lanes disposed on a road; and said wireless communication device a timing of a transmission/reception control period in which the control channel of the first frequency is transmitted and received with the vehicle, and a transmission and reception control period in which the service channel is transmitted and received at the same frequency as the service channel of the plurality of frequencies different from the first frequency The timing is shifted from the timing of the adjacent first adjacent radio communication device and the timing of the second adjacent radio communication device, which is another radio communication device adjacent to the first adjacent radio communication device, and travels on the corresponding lane. The vehicle is sent and received. A wireless communication system according to claim 1, wherein said wireless communication device transmits and receives to said vehicle by a service channel having a frequency of a different frequency from a service channel used by said adjacent wireless communication device. A wireless communication system comprising a plurality of wireless communication devices for each of said lanes for wireless communication with a vehicle traveling on any of a plurality of lanes disposed on a road; and said wireless communication device a timing of a transmission/reception control period in which the control channel of the first frequency is transmitted and received with the vehicle, and a timing of a transmission/reception control period in which the service channel at a frequency different from the first frequency is transmitted and received with the vehicle, and another wireless communication device adjacent thereto The timing is shifted, and is transmitted and received by a vehicle traveling on the corresponding lane, and the wireless communication device performs the same with the vehicle by using a service channel with a frequency of a different frequency of the service channel used by the other adjacent wireless communication device. Send and receive. A method of controlling a wireless communication system, the wireless communication system including a plurality of wireless communication devices for each of the lanes in which wireless communication is performed between vehicles traveling on any of a plurality of lanes on the road; and the wireless communication device causes the control channel at the first frequency to be performed with the vehicle The timing of the transmission and reception control period of the transmission and reception, and the timing of the transmission and reception control period of the transmission and reception of the service channel having the same frequency in the service channel different from the plurality of frequencies of the first frequency, and the adjacent first adjacent wireless The timing of the communication device and the timing of the second adjacent wireless communication device, which is another wireless communication device adjacent to the first adjacent wireless communication device, are shifted, and are transmitted and received with the vehicle traveling on the corresponding traffic lane. The control method of claim 4, wherein the wireless communication device transmits and receives to the vehicle by a service channel having a frequency different from a frequency of a service channel used by another wireless communication device adjacent to the wireless communication device. A method of controlling a wireless communication system, the wireless communication system comprising a plurality of wireless communication devices for each of the lanes for wireless communication with a vehicle traveling on any of a plurality of lanes disposed on a road; The wireless communication device sets a timing of a transmission/reception control period in which a control channel of a first frequency is transmitted and received with the vehicle, and a timing of a transmission/reception control period in which a service channel that is different from the first frequency is transmitted and received with the vehicle, and The timing of the other adjacent wireless communication devices is shifted, and is transmitted and received by the vehicle traveling on the corresponding lane, and the wireless communication device serves the different frequencies by the frequency of the service channel used by the other adjacent wireless communication devices. The channel is transmitted and received with the above vehicle. A program for causing a computer of a plurality of wireless communication devices of each of the lanes that wirelessly communicate with a vehicle traveling on any one of a plurality of lanes disposed on a road to function as: The control channel of the first frequency is transmitted and received during the transmission and reception control period of the vehicle And a timing of a transmission/reception control period in which the service channel having the same frequency in the service channel different from the plurality of frequency channels of the first frequency and the vehicle transmits and receives, and a timing of the adjacent first adjacent wireless communication device And the timing of the second adjacent radio communication device, which is another radio communication device adjacent to the first adjacent radio communication device, is shifted, and is transmitted and received with the vehicle traveling on the corresponding lane.