INTERFERENCE-ADAPTIVE UWB RADIO-BASED VEHICLE COMMUNICATION SYSTEM FOR ACTIVE-SAFETY

• US 20110250836A1
• Filed: 04/09/2010
• Published: 10/13/2011
• Est. Priority Date: 04/09/2010
• Status: Abandoned Application

• Current Assignee: Telcordia Technologies Incorporated (Telefonaktiebolaget LM Ericsson)
• Original Assignee: Telcordia Technologies Incorporated (Telefonaktiebolaget LM Ericsson)
• Inventors: Chen, Wai, Guha, Ratul K.
• Application Number:
  US12/757,078
• Publication Number:
  US 20110250836A1
• Time in Patent Office: Days
• US Class Current: 455/39
• CPC Class Codes: G08G 1/161 Decentralised systems, e.g. inter-vehicle communication
• CPC Class Codes: H04B 1/719 Interference-related aspects

Abstract

A system and method for increasing transmission concurrency amongst communicating vehicles using UWB radio-based communication is presented. The method comprises dividing an area around a sending vehicle into transmission areas, and, for each transmission area, broadcasting a message from the sending vehicle, waiting for a time, and when a not clear to send response is not received, sending information to the transmission area, and the information being sent using a time-hopping sequence based on a location and seed in the message. The message can also have a frame length and a target region. The method can also comprise determining, when a no-send is received, whether the no-send was in response to the message from the sending vehicle, and when the no-send is not in response to the message from the sending vehicle, sending the information to the transmission area. The system and method can be used for active-safety vehicle communication.

Claims

1. A method for increasing transmission concurrency amongst a plurality of communicating vehicles using UWB radio-based communication, comprising steps of:

dividing an area around a sending vehicle of the plurality of communicating vehicles into more than one transmission area;

for each transmission area;

broadcasting a message from the sending vehicle;

waiting for a time; and

after waiting for the time and when a no-send is not received, sending information to the transmission area,

wherein the message comprises at least a location and a seed and the information is sent using a mutual time-hopping sequence based on the location and the seed.

2. The method of claim 1, wherein the message further comprises a frame length and a target region.

3. The method of claim 1, further comprising steps of:

determining, when a no-send is received, whether the no-send was in response to the message from the sending vehicle; and

when the no-send is not in response to the message from the sending vehicle, sending the information to the transmission area.

4. The method of claim 1, wherein the seed is used to generate a sequence of chip positions using a pseudo-random number generator.

5. The method of claim 1, wherein the information is active-safety communication information.

6. The method of claim 1, further comprising a step of obtaining the information by periodically sampling from at least one of a sending vehicle driving system, on-board sensors and units in the sending vehicle, and GPS systems.

7. A system for increasing transmission concurrency amongst communicating vehicles using UWB radio-based communication, comprising:

a sending vehicle of the plurality of communicating vehicles;

a plurality of transmission areas around the sending vehicle;

a message broadcast from the sending vehicle to each of the plurality of transmission areas; and

information sent from the sending vehicle to one of the plurality of transmission areas after waiting for a time and when a no-send is not received at the sending vehicle,

wherein the message comprises at least a location and a seed and the information is sent using a mutual time-hopping sequence based on the location and the seed.

8. The system of claim 7, wherein the message further comprises a frame length and a target region.

9. The system of claim 7, wherein when a no-send is received, determining whether the no-send was in response to the message from the sending vehicle, and when the no-send is not in response to the message from the sending vehicle, the information is sent to the transmission area.

10. The system of claim 7, wherein the seed is used to generate a sequence of chip positions using a pseudo-random number generator.

11. The system of claim 7, wherein the information is active-safety communication information.

12. The system of claim 7, wherein the information is obtained by periodically sampling from at least one of a sending vehicle driving system, on-board sensors and units in the sending vehicle, and GPS systems.

13. A computer readable storage medium storing a program of instructions executable by a machine to perform a method for increasing transmission concurrency amongst a plurality of communicating vehicles using UWB radio-based communication, comprising:

dividing an area around a sending vehicle of the plurality of communicating vehicles into more than one transmission area;

for each transmission area;

broadcasting a message from the sending vehicle;

waiting for a time; and

after waiting for the time and when a no-send is not received, sending information to the transmission area,

wherein the message comprises at least a location and a seed and the information is sent using a mutual time-hopping sequence based on the location and the seed.

14. The computer readable storage medium of claim 13, wherein the message further comprises a frame length and a target region.

15. The computer readable storage medium of claim 13, further comprising steps of:

determining, when a no-send is received, whether the no-send was in response to the message from the sending vehicle; and

when the no-send is not in response to the message from the sending vehicle, sending the information to the transmission area.

16. The computer readable storage medium of claim 13, wherein the seed is used to generate a sequence of chip positions using a pseudo-random number generator.

17. The computer readable storage medium of claim 13, wherein the information is active-safety communication information.

18. The computer readable storage medium of claim 13, further comprising a step of obtaining the information by periodically sampling from at least one of a sending vehicle driving system, on-board sensors and units in the sending vehicle, and GPS systems.