Patent ID: 8457106
Filing Date: 2013-06-04
Classification: H04W

Abstract:
1. A wireless communication method, comprising: selecting a plurality of transmission candidate nodes among a plurality of neighboring sensor nodes of a source sensor node through at least one of time slot information, location information, transmitting/receiving buffer length information, or vehicle occupancy information; the plurality of selected transmission candidate nodes being activated in a time slot allocated to the source sensor node and overhearing a packet transmitted from the source sensor node to a destination sink node; determining whether the destination sink node receives the packet by overhearing whether an answer packet that informs whether the destination sink node received the packet is transmitted to the source sensor node; when it is determined that the destination sink node did not receive the packet, selecting one of the plurality of transmission candidate nodes as a transmission node by using at least one of the time slot information, the transmitting/receiving buffer length information, and the vehicle occupancy information; and checking whether the selected transmission node transmits the overheard packet to the destination sink node, wherein the selecting the transmission candidate nodes comprises checking a distance between the source sensor node and the destination sink node by using location information of the source sensor node and selecting a node to which a time slot is allocated has later than a time slot allocated to the source sensor node as the transmission node among the plurality of neighboring sensor nodes.