| 摘要 |
PROBLEM TO BE SOLVED: To provide a wireless network where each wireless equipment can efficiently exchange positional information with a surrounding terminal. SOLUTION: The wireless equipment M1-M30 mounted on vehicles C1-C30 measure the locations, the velocity, and the travel direction of the vehicles C1-C30 mounted with own equipment, whenever a need arises, and registers positional information composed of the measured location, velocity, and travel direction into a positional information table at each equipment. Then, the wireless equipment M2 mounted on the vehicle C2 transmits the positional information of the vehicle C2 with a transmission cycle longer than T, which is equal to or longer than the transmission cycle T of a Hello message in a wireless network 100. The wireless equipment M1 and M3, mounted on the vehicles C1 and C3 adjacent to the vehicle C2, receive the positional information transmitted from the wireless equipment M2 with the cycle longer than T, and update a positional information table held by each equipment, by using the received positional information. COPYRIGHT: (C)2009,JPO&INPIT
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