Radio beacon and method for selectively communicating in accordance with 5.8 and 5.9 GHz DSRC standards

• US 8,983,382 B2
• Filed: 08/29/2012
• Issued: 03/17/2015
• Est. Priority Date: 09/21/2011
• Status: Active Grant

• Current Assignee: Kapsch TrafficCom AG (Datax Handelsgmbh)
• Original Assignee: Kapsch TrafficCom AG (Datax Handelsgmbh)
• Inventors: Smely, Dieter, Nagy, Oliver
• Primary Examiner(s): Sorowar, Golam
• Application Number:
  US13/598,081
• Publication Number:
  US 20130072121A1
• Time in Patent Office: 930 Days
• Field of Search: 455 411- 413, 455/427, 455/62, 370/338, 370/315, 370/445, 370/503, 370/468, 370/328, 370/235, 370/310
• US Class Current: 455/41.2
• CPC Class Codes: G07B 15/063 using wireless information transmission between the vehicle and a fixed station identification of vehicles G08G
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks

Abstract

A radio beacon and a method for selective radio communication with a first onboard unit and a second onboard unit, in which a sequence of first data packet is transmitted to the first onboard unit in a first frequency band in accordance with 5.8 GHz DSRC standards, a sequence of second data packet is transmitted or received to/from the second onboard unit in accordance with 5.9 GHz DSRC standards, wherein the transmission of a data packet of the sequence of first data packet is delayed by the duration of the second data packet if the second data packet appears in the second frequency band.

Claims

1. A radio beacon comprising:

a first transceiver for radio communication with a first onboard unit in accordance with a 5.8 GHz DSRC standard, wherein the first transceiver is configured to transmit a sequence of first data packets in a first frequency band; and

a second transceiver for radio communication with a second onboard unit in accordance with a 5.9 GHz DSRC standard, wherein the second transceiver is configured to transmit or receive a second data packet in a second frequency band, the first frequency band and the second frequency band being different from each other,

wherein the radio beacon is configured to delay transmission of a data packet of the sequence of first data packets by a time duration of the second data packet, when the second data packet appears in the second frequency band.

2. The radio beacon according to claim 1, wherein a time interval between two data packets of the sequence of first data packets is in a range of 10-30 ms and the time duration of the second data packet is equal to or less than 2 ms.

3. The radio beacon according to claim 1, wherein the first transceiver monitors the second frequency band to cause the delay in the transmission of a first data packet, when the second data packet in the second frequency band is detected.

4. The radio beacon according to claim 1, wherein the second transceiver controls the first transceiver to cause the delay in the transmission of a first data packet, when the second transceiver transmits or receives a second data packet.

5. The radio beacon according to claim 1, wherein the second transceiver monitors the first frequency band and transmits a second data packet, only when the first frequency band is clear.

6. The radio beacon according to claim 1, wherein the first transceiver prevents the second transceiver from transmitting a second data packet, when the first transceiver transmits or receives a first data packet.

7. The radio beacon according to claim 1, wherein the first transceiver comprises an antenna with directional characteristic.

8. A method for selective radio communication between a radio beacon and first and second onboard units, the method comprising:

transmitting, by the radio beacon to the first onboard unit, a sequence of first data packets in a first frequency band, in accordance with a 5.8 GHz DSRC standard; and

transmitting or receiving, by the radio beacon to/from the second onboard unit, at least one second data packet in a second frequency band, in accordance with a 5.9 GHz DSRC standard, the first frequency band and the second frequency band being different from each other,

wherein transmission of a data packet of the sequence of first data packets is delayed by a duration of the second data packet, when the second data packet appears in the second frequency band.

9. The method according to claim 8, wherein a time interval between two data packets of the sequence of first data packets is about 10-30 ms and the aforementioned duration of a second data packet is no longer than 2 ms.

10. The method according to claim 8, wherein a second data packet is transmitted, only when the first frequency band is clear.