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Short range radio continuous communication method and system

  • US 20020047786A1
  • Filed: 10/12/2001
  • Published: 04/25/2002
  • Est. Priority Date: 10/25/2000
  • Status: Active Grant
First Claim
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1. A short range radio communication method, in which a DSRC (Dedicated Short Range Communication) that is a short range radio communication used for an ETC (Electronic Toll Collection) that is a non-stop toll collection system is applied, and roadside antennas that are provided at a roadside are continuously arranged, and time sharing operation is performed by synchronizing sending timing of a communication frame in all of said roadside antennas, comprising:

  • a step for receiving a communication frame transmitted from an adjacent roadside antenna during the communication with one of said roadside antennas in an on-vehicle device which is a radio set mounted on a vehicle and performs the communication with said roadside antennas.

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