Abstract: A handover method for managing WBSS vehicle network managed by a WESS-CM includes: recognizing that a vehicle enters an overlapped area between first and second WBSSs; sending, by the first WBSS, a handover recommend request to the WESS-CM; confirming with the second WBSS, by the WESS-CM, whether handover is possible; responding to the WESS-CM, by the second WBSS, the availability of the handover after allocating communication resources; sending, by the WESS-CM, a handover recommend response to the first WBSS; transmitting, by the first WBSS, a handover request message to the vehicle; performing the handover, by the vehicle, by performing reassociation with the second WBSS; and periodically broadcasting, by the vehicle, basic safety message using a T-slot in shared control channel and a T-slot in BSM channel for the second WBSS, while the vehicle is located in the overlapped area.

Abstract: The present application relates to a multichannel access control method in an overlapped vehicular network, and more specifically, a multichannel access control method in vehicular networks, for managing a Wireless Access in Vehicular Environments (WAVE) basic service set (WBSS) vehicular network which is managed by a WAVE extended service set control and management system (WESS-CM) and is provided by using a road side unit (RSU) in a plurality of vehicle environments having overlapped areas, comprising: configuring Time Division Multiple Access (TDMA)-slots (T-slots) divided from the synchronization interval with respect to the CCH and a Basic Safety Message channel (BSMCH) for each WBSS that has a control channel (CCH) and the BSMCH in which the synchronization interval are preset, and distributing T-slots divided from the CCH to a plurality of the WBSS; wherein the first T-slot of the group of T-slots of the CCH is used to broadcast a beacon message including TDMA information of the WBSS such as the identi

Abstract: A handover method manages Wireless Access in Vehicle Environments (WAVE) Basic Service Set (WBSS) vehicle network which is managed by a Wireless Access in Vehicle Environments (WAVE) Extends Service Set Control and Management System (WESS-CM) and provided by using Road Side Unit (RSU) in multiple vehicle environments having overlapped areas. The method includes confirming that a vehicle enters an overlapped area between a first WBSS and a second WBSS; requesting, by the first WBSS, a handover recommend to the WESS-CM; confirming with the second WBSS, by the WESS-CM, whether handover is possible; responding to the WBESS-CM, by the second WBSS, to the availability of the handover after allocating communication resources available for the vehicle; responding, by the WESS-CM, the handover recommend response to the first WBSS; transmitting, by the first WBSS, a handover request message to the vehicle; and performing the handover.

Abstract: The present application relates to a multichannel access control method in an overlapped vehicular network, and more specifically, a multichannel access control method in vehicular networks, for managing a Wireless Access in Vehicular Environments (WAVE) basic service set (WBSS) vehicular network which is managed by a WAVE extended service set control and management system (WESS-CM) and is provided by using a road side unit (RSU) in a plurality of vehicle environments having overlapped areas, comprising: configuring Time Division Multiple Access (TDMA)-slots (T-slots) divided from the synchronization interval with respect to the CCH and a Basic Safety Message channel (BSMCH) for each WBSS that has a control channel (CCH) and the BSMCH in which the synchronization interval are preset, and distributing T-slots divided from the CCH to a plurality of the WBSS; wherein the first T-slot of the group of T-slots of the CCH is used to broadcast a beacon message including TDMA information of the WBSS such as the identi