Channel access method for vehicle communication handover

• US 8,543,155 B2
• Filed: 08/01/2011
• Issued: 09/24/2013
• Est. Priority Date: 08/02/2010
• Status: Active Grant

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: Lee, Sangwoo, Choi, Hyun Kyun, Oh, Hyun Seo
• Primary Examiner(s): Rego, Dominic E
• Application Number:
  US13/195,365
• Publication Number:
  US 20120028675A1
• Time in Patent Office: 785 Days
• Field of Search: 455/525, 455/436, 455/439, 455/442, 455/443, 455/575.9, 455/99, 455/152.1, 455/557, 340/991, 340/426.16
• US Class Current: 455/525
• CPC Class Codes: H04W 36/18 for allowing seamless reselection, e.g. soft reselection
• CPC Class Codes: H04W 74/00 Wireless channel access

Abstract

A first roadside equipment operates as a transmitting/receiving mode in a control channel interval of an Nth synchronization interval so as to support a handover. In this instance, a second roadside equipment neighboring to the first roadside equipment operates as a receiving mode in the control channel interval of the Nth synchronization interval. The first roadside equipment operates as the receiving mode in a control channel interval of an (N+1)th synchronization interval. In this instance, the second roadside equipment operates as the transmitting/receiving mode in the control channel interval of the (N+1)th synchronization interval.

Claims

1. A method for a plurality of roadside equipments to access a channel to support a vehicle communication handover, the method comprising:

a first roadside equipment among the plurality of roadside equipments operating a transmitting/receiving mode in a control channel interval of an Nth synchronization interval;

a second roadside equipment neighboring to the first roadside equipment among the plurality of roadside equipments operating as a receiving mode in the control channel interval of the Nth synchronization interval;

the first roadside equipment operating as the receiving mode in a control channel interval of an (N+1)th synchronization interval; and

the second roadside equipment operating as the transmitting/receiving mode in the control channel interval of the (N+1)th synchronization interval.

2. The method of claim 1, wherein the Nth synchronization interval and the (N+1)th synchronization interval respectively further include a service channel interval.

3. The method of claim 2, wherein the plurality of roadside equipments operating as the transmitting/receiving mode in the service channel interval of the Nth synchronization interval and the (N+1)th synchronization interval.

4. The method of claim 1, wherein the first roadside equipment or the second roadside equipment transmits/receives a frame to/from a vehicle in the transmitting/receiving mode.

5. The method of claim 1, wherein the first roadside equipment or the second roadside equipment receives a frame from a vehicle in the receiving mode.

6. The method of claim 1, wherein the first roadside equipment and the second roadside equipment are disposed to form an interval in which a propagation range is overlapped.

7. The method of claim 1, wherein the control channel interval and the service channel interval are alternately set in the Nth synchronization interval and the (N+1)th synchronization interval.

8. A method for a plurality of roadside equipments to access a channel to support a vehicle communication handover, the method comprising:

a first roadside equipment among the plurality of roadside equipments operating as a transmitting/receiving mode in a control channel interval of an Nth synchronization interval;

a second roadside equipment neighboring to the first roadside equipment among the plurality of roadside equipments operating as a receiving mode in the control channel interval of the Nth synchronization interval;

the first roadside equipment and the second roadside equipment operating as the transmitting/receiving mode in a service channel interval of the N-th synchronization interval;

the first roadside equipment operating as the receiving mode in a control channel interval of an (N+1)th synchronization interval;

the second roadside equipment operating as the transmitting/receiving mode in the control channel interval of the (N+1)th synchronization interval; and

the first roadside equipment and the second roadside equipment operating as the transmitting/receiving mode in a service channel interval of the (N+1)th synchronization interval.

9. The method of claim 8, wherein the first roadside equipment or the second roadside equipment transmits/receives a frame to/from a vehicle in the transmitting/receiving mode.

10. The method of claim 8, wherein the first roadside equipment or the second roadside equipment receives a frame from a vehicle in the receiving mode.

11. The method of claim 8, wherein the first roadside equipment and the second roadside equipment are disposed to form an interval in which a propagation range is overlapped.

12. The method of claim 8, wherein the control channel interval and the service channel interval are alternately set in the Nth synchronization interval and the (N+1)th synchronization interval.