| 摘要 |
PROBLEM TO BE SOLVED: To provide a roadside communication method, a roadside wireless apparatus, and an on-vehicle wireless apparatus and system wherein many roadside wireless apparatuses exist near a roadside wireless apparatus and a period of time required for switching wireless frequencies to maintain wireless communication is shortened in a vehicle roadside communication. SOLUTION: In this vehicle roadside communication method wherein any of a plurality of the roadside wireless apparatuses makes wireless communication with the on-vehicle wireless apparatus, the on-vehicle wireless apparatus located in an area of the roadside wireless apparatus transmits a transmission signal including succeeding area frequency object information using one roadside wireless apparatus object able to make wireless communication next or over and searches and sets a succeeding wireless frequency on the basis of received succeeding area frequency object information. COPYRIGHT: (C)2003,JPO
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