Channel access method for vehicle communication handover

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.