Back to results
US 7,460,864 B2Granted
Roadside narrowband wireless communication apparatus
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorHiroshi Araki
Life of this patent
Estimating the term…
Abstract
A baseband signal is used for transmission between a roadside antenna apparatus and a roadside apparatus. A setting tool, such as a personal computer, is connected to the roadside apparatus so that adjustment/setting of the roadside antenna apparatus may be remotely performed with the setting tool. The baseband signal and the remote control signal are compressed and transmitted on an ordinary transmission signal.
Claims11
A roadside narrowband wireless communication apparatus comprising:
- a roadside antenna apparatus having
- a wireless communication unit located in the vicinity of a road, the wireless communication unit sending a first radio signal to, and receiving a second radio signal from, a wireless communication device mounted on a vehicle traveling on the road, and
- a first multiplexing unit connected to the wireless communication unit and receiving a first multiplexed signal including a transmission baseband signal and an adjustment signal, the first multiplexing unit communicating the transmission baseband signal and the adjustment signal to the wireless communication unit for adjusting the wireless communication unit;
- a roadside apparatus having
- a second multiplexing unit communicating with the roadside antenna apparatus, the second multiplexing unit sending the first multiplexed signal to, and receiving a second multiplexed signal from, the first multiplexing unit,
- a wireless communication control unit connected to the second multiplexing unit, the wireless communication control unit receiving the transmission baseband signal and sending the transmission baseband signal to the second multiplexing unit to convert the transmission baseband signal into part of the first multiplexed signal, and
- a network connection unit connected to the wireless communication control unit and to an external, wired communication network, the network connection unit sending the transmission baseband signal to the wireless communication control unit, and receiving the transmission baseband signal from a system connected to the wired communication network;
- and
- an adjustment tool connected to the wireless communication control unit of the roadside apparatus, wherein
- the second multiplexing unit transmits a transmission reference clock signal together with the transmission baseband signal, at identical signal speeds, and
- the wireless communication unit of the roadside antenna apparatus generates a multiplied clock signal synchronized to the transmission reference clock signal and communicates with the wireless communication device of the vehicle based on the multiplied clock signal generated.
8 more elements
A roadside narrowband wireless communication apparatus comprising:
- a roadside antenna apparatus having
- a wireless communication unit located in the vicinity of a road, the wireless communication unit sending a first radio signal to, and receiving a second radio signal from, a wireless communication device mounted on a vehicle traveling on the road, and
- a first multiplexing unit connected to the wireless communication unit and receiving a first multiplexed signal including a transmission baseband signal and an adjustment signal, the first multiplexing unit communicating the transmission baseband signal and the adjustment signal to the wireless communication unit for adjusting the wireless communication unit;
- a roadside apparatus having
- a second multiplexing unit communicating with the roadside antenna apparatus, the second multiplexing unit sending the first multiplexed signal to, and receiving a second multiplexed signal from, the first multiplexing unit,
- a wireless communication control unit connected to the second multiplexing unit, the wireless communication control unit receiving the transmission baseband signal and sending the transmission baseband signal to the second multiplexing unit to convert the transmission baseband signal into part of the first multiplexed signal, and
- a network connection unit connected to the wireless communication control unit and to an external, wired communication network, the network connection unit sending the transmission baseband signal to the wireless communication control unit, and receiving the transmission baseband signal from a system connected to the wired communication network;
- and
- an adjustment tool connected to the wireless communication control unit of the roadside apparatus, wherein the first and second multiplexed signals transmitted between the first multiplexing unit and the second multiplexing unit are packet signals comprising a header, a wireless communication unit address, a wireless communication control address, multiplex data, and a parity bit.
6 more elements
A roadside narrowband wireless communication apparatus comprising:
- a roadside antenna apparatus having a wireless communication unit located in the vicinity of a road, the wireless communication unit sending a first radio signal to, and receiving a second radio signal from, a wireless communication device mounted on a vehicle traveling on the road, and a first multiplexing unit connected to the wireless communication unit and receiving a first multiplexed signal including a transmission baseband signal and an adjustment signal, the first multiplexing unit communicating the transmission baseband signal and the adjustment signal to the wireless communication unit for adjusting the wireless communication unit;
- a roadside apparatus having a second multiplexing unit communicating with the roadside antenna apparatus, the second multiplexing unit sending the first multiplexed signal to, and receiving a second multiplexed signal from, the first multiplexing unit, a wireless communication control unit connected to the second multiplexing unit, the wireless communication control unit receiving the transmission baseband signal and sending the transmission baseband signal to the second multiplexing unit to convert the transmission baseband signal into part of the first multiplexed signal, and a network connection unit connected to the wireless communication control unit and to an external wired communication network, the network connection unit sending the transmission baseband signal to the wireless communication control unit, and receiving the transmission baseband signal from a system connected to the wired communication network;
- and an adjustment tool connected to the wireless communication control unit of the roadside apparatus, wherein the first multiplexed signal includes header information and, when the wireless communication unit recognizes the header information of the first multiplexed signal as a loop-back code, the wireless communication unit transmits the first multiplexed signal by loop-back transmission at a constant time interval.
A roadside narrowband wireless communication apparatus comprising:
- a roadside antenna apparatus having a wireless communication unit located in the vicinity of a road, the wireless communication unit sending a first radio signal to, and receiving a second radio signal from, a wireless communication device mounted on a vehicle traveling on the road, and a first multiplexing unit connected to the wireless communication unit and receiving a first multiplexed signal including a transmission baseband signal and an adjustment signal, the first multiplexing unit communicating the transmission baseband signal and the adjustment signal to the wireless communication unit for adjusting the wireless communication unit;
- a roadside apparatus having a second multiplexing unit communicating with the roadside antenna apparatus, the second multiplexing unit sending the first multiplexed signal to, and receiving a second multiplexed signal from, the first multiplexing unit, a wireless communication control unit connected to the second multiplexing unit, the wireless communication control unit receiving the transmission baseband signal and sending the transmission baseband signal to the second multiplexing unit to convert the transmission baseband signal into part of the first multiplexed signal, and a network connection unit connected to the wireless communication control unit and to an external wired communication network, the network connection unit sending the transmission baseband signal to the wireless communication control unit, and receiving the transmission baseband signal from a system connected to the wired communication network;
- and an adjustment tool connected to the wireless communication control unit of the roadside apparatus, wherein the wireless communication unit sends a test pattern to the wireless communication control unit, receives a test pattern sent back from the wireless communication control unit, and compares the test pattern sent back from the wireless communication control unit with the test pattern sent to the wireless communication control unit.
A roadside narrowband wireless communication apparatus comprising:
- a roadside antenna apparatus having
- a wireless communication unit located in the vicinity of a road, the wireless communication unit sending a first radio signal to, and receiving a second radio signal from, a wireless communication device mounted on a vehicle traveling on the road, and
- a first multiplexing unit connected to the wireless communication unit and receiving a first multiplexed signal including a transmission baseband signal and an adjustment signal, the first multiplexing unit communicating the transmission baseband signal and the adjustment signal to the wireless communication unit for adjusting the wireless communication unit:
- a roadside apparatus having
- a second multiplexing unit communicating with the roadside antenna apparatus, the second multiplexing unit sending the first multiplexed signal to, and receiving a second multiplexed signal from, the first multiplexing unit,
- a wireless communication control unit connected to the second multiplexing unit, the wireless communication control unit receiving the transmission baseband signal and sending the transmission baseband signal to the second multiplexing unit to convert the transmission baseband signal into part of the first multiplexed signal, and
- a network connection unit connected to the wireless communication control unit and to an external, wired communication network, the network connection unit sending the transmission baseband signal to the wireless communication control unit, and receiving the transmission baseband signal from a system connected to the wired communication network;
- an adjustment tool connected to the wireless communication control unit of the roadside apparatus;
- and
- a serial data control apparatus connecting the adjustment tool to the wireless communication control unit so that the wireless communication control unit receives the command information as serial data.
7 more elements
Dependencies are inferred from the claim text.