Wireless communication device, roadside unit, and wireless communication method
The present invention improves the success rate of wireless connection in communications between moving objects or roadside unit-to-moving object communications. A wireless communication device ( 100 ) includes a first radio ( 101 ) and a second radio ( 102 ). The first radio ( 101 ) scans, at one of the front and rear of a moving object ( 10 ), a first connection destination detecting signal for first moving object-to-moving object communication or first roadside unit-to-moving object communication. The second radio ( 102 ) transmits, toward the other of the front and rear of the moving object ( 10 ), a second connection destination detecting signal for second moving object-to-moving object communication or second roadside unit-to-moving object communication.
1. A radio communication apparatus, comprising:
a first radio device, which in operation, scans a first signal used in detecting a connection destination on a front side of a first moving object, the first signal being used in detecting the connection destination in first moving object-to-moving object communication or first roadside apparatus-to-moving object communication; and
a second radio device, which in operation,
transmits a second signal used in detecting a connection destination of a second moving object toward a back side of the first moving object, the second signal being used in detecting the connection destination in second moving object-to-moving object communication;
establishes the second moving object-to-moving object communication with the second moving object;
transmits, using the second moving object-to-moving object communication, a list of services that the radio communication apparatus is capable of relaying, from the first moving object-to-moving object communication or the first roadside apparatus-to-moving object communication, to the second moving object;
receives, from the second moving object, a request for provisioning a service of the list of services; and
provisions the service to the second moving object over the second moving object-to-moving object communication.
2. The radio communication apparatus according to claim 1 , wherein,
the first radio device operates in a station (STA) mode, and
the second radio device operates in a PBSS Central Point (PCP) mode or an access point (AP) mode.
3. The radio communication apparatus according to claim 1 , wherein the first radio device and the second radio device are integrally installed on the first moving object.
4. The radio communication apparatus according to claim 3 , wherein the first radio device and the second radio device are installed on a roof of the first moving object.
5. The radio communication apparatus according to claim 1 , wherein,
the first radio device is installed on a front section of the first moving object, and
the second radio device is installed on a rear section of the first moving object.
6. The radio communication apparatus according to claim 5 , wherein,
the front section is at least one of a dashboard, a sun visor, a front monitoring camera, a rearview mirror, and/or a front bumper, and
the rear section is at least one of a shark fin antenna, a rear monitoring camera, a back door, and/or a rear bumper.
7. The radio communication apparatus according to claim 1 , comprising a control device, which in operation, controls data transmission between the first radio device and the second radio device.
8. The radio communication apparatus according to claim 1 , wherein the first moving object-to-moving object communication or the second moving object-to-moving object communication is communication related to at least one of a service on driving safety support systems, a sensor data sharing service, and/or a distribution service of an image and/or a video by a dashboard camera and a camera mounted on the first moving object.
9. The radio communication apparatus according to claim 1 , wherein the first roadside apparatus-to-moving object communication or the second roadside apparatus-to-moving object communication is communication related to at least one of an Internet connection service, an automatic toll payment service using electric toll collection (ETC), a service on driving safety support systems, a sensor data sharing service, a software and/or firmware update service, a map distribution service, a distribution service of an image and/or a video by a surveillance camera and a camera mounted on a roadside apparatus, and/or a traffic information distribution service.
10. The radio communication apparatus according to claim 7 , wherein the data transmission is a relay of data in an image and/or video transmission service.
11. A roadside apparatus, comprising:
a first radio device, which in operation, scans a first signal used in detecting a connection destination on a first direction where a first moving object moves away from the roadside apparatus, the first signal being used in detecting the connection destination in first roadside apparatus-to-moving object communication; and
a second radio device, which in operation,
transmits a second signal used in detecting a connection destination of a second moving object toward a second direction where the second moving object approaches the roadside apparatus, the second signal being used in detecting the connection destination in second roadside apparatus-to-moving object communication;
establishes the second roadside apparatus-to-moving object communication with the second moving object;
transmits, using the second moving object-to-moving object communication, a list of services that the roadside apparatus is capable of relaying, from the first roadside apparatus-to-moving object communication, to the second moving object;
receives, from the second moving object, a request for provisioning a service of the list of services; and
provisions the service to the second moving object over the second roadside apparatus-to-moving object communication.
12. The roadside apparatus according to claim 11 , wherein the first radio device and the second radio device are installed in a single housing.
13. The roadside apparatus according to claim 11 , wherein,
the first radio device and the second radio device are respectively installed in two separate housings, and
the first radio device is installed on the first side where the first moving object moves away from the roadside apparatus, and the second radio device is installed on the second side where the second moving object approaches the roadside apparatus.
14. The roadside apparatus according to claim 11 , comprising a control device, which in operation, controls signal transmission between the first radio device and the second radio device.
15. A radio communication method for a first moving object, the radio communication method comprising:
scanning, by a first radio device of the first moving object, a first signal used in detecting a connection destination on a front side of the first moving object, the first signal being used in detecting the connection destination in first moving object-to-moving object communication or first roadside apparatus-to-moving object communication;
transmitting, by a second radio device of the first moving object, a second signal used in detecting a connection destination of a second moving object toward a back side of the first moving object, the second signal being used in detecting the connection destination in second moving object-to-moving object communication;
establishing, by the second radio device, the second moving object-to-moving object communication with the second moving object;
transmitting, by the second radio device and using the second moving object-to-moving object communication, a list of services that the first moving object is capable of relaying, from the first moving object-to-moving object communication or the first roadside apparatus-to-moving object communication, to the second moving object;
receiving, by the second radio device from the second moving object, a request for provisioning a service of the list of services; and
provisioning, by the second radio device, the service to the second moving object over the second moving object-to-moving object communication.
16. A radio communication method for a roadside apparatus, the radio communication method comprising:
scanning, by a first radio device of the roadside apparatus, a first signal used in detecting a connection destination on a first direction where a first moving object moves away from the roadside apparatus, the first signal being used in detecting the connection destination in first roadside apparatus-to-moving object communication;
transmitting, by a second radio device of the roadside apparatus, a second signal used in detecting a connection destination of a second moving object toward a second direction where the second moving object approaches the roadside apparatus, the second signal being used in detecting the connection destination in second roadside apparatus-to-moving object communication;
establishing, by the second radio device, the second roadside apparatus-to-moving object communication with the second moving object;
transmitting, by the second radio device and using the second moving object-to-moving object communication, a list of services that the roadside apparatus is capable of relaying, from the first roadside apparatus-to-moving object communication, to the second moving object;
receiving, by the second radio device from the second moving object, a request for provisioning a service of the list of services; and
provisioning, by the second radio device, the service to the second moving object over the second roadside apparatus-to-moving object communication.