Road-vehicle communication system
First Claim
1. A road-vehicle communication system, comprising a plurality of road-side radio apparatuses and at least one on-vehicle radio apparatus, said road-side radio apparatus for communication based on a DSRC system comprising modulating means for modulating a carrier by transmission data and transmitting means for transmitting the carrier after modulation by said modulating means by sufficient power, said on-vehicle radio apparatus comprising receiving means for receiving the carrier transmitted by said transmitting means in each of said road-side radio apparatuses by switching a reception frequency, wherein at least said one road-side radio apparatus comprises:
- service presenting state data generating means which generates data on a service presenting state having a corresponding relationship between information indicating the type of services presented by said road-side radio apparatus and information indicating that said road-side radio apparatus uses the carrier of which frequency, every road-side radio apparatus; and
data multiplexing means which multiplexes the data on the service presenting state which is generated by said service presenting state data generating means, to the transmission data.
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Accused Products
Abstract
A road-side apparatus for transmitting a carrier of a specified frequency has a service presenting state data generating unit and an FCMC generating unit. The service presenting state data generating unit generates data on a service presenting state having a corresponding relationship between information indicating the type of services presented by the road-side apparatus and information indicating that the road radio apparatus uses the carrier of which frequency, every road-side apparatus. The FCMC generating unit multiplexes the data on the service presenting state generated by the service presenting state data generating unit, to transmission data. In an on-vehicle apparatus, a service presenting state data separating unit obtains the data on the service presenting state from the transmission data, and a carrier specifying unit specifies the carrier for presenting a desired service and sets a reception frequency of a receiving unit.
8 Citations
8 Claims
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1. A road-vehicle communication system, comprising a plurality of road-side radio apparatuses and at least one on-vehicle radio apparatus, said road-side radio apparatus for communication based on a DSRC system comprising modulating means for modulating a carrier by transmission data and transmitting means for transmitting the carrier after modulation by said modulating means by sufficient power, said on-vehicle radio apparatus comprising receiving means for receiving the carrier transmitted by said transmitting means in each of said road-side radio apparatuses by switching a reception frequency,
wherein at least said one road-side radio apparatus comprises: -
service presenting state data generating means which generates data on a service presenting state having a corresponding relationship between information indicating the type of services presented by said road-side radio apparatus and information indicating that said road-side radio apparatus uses the carrier of which frequency, every road-side radio apparatus; and
data multiplexing means which multiplexes the data on the service presenting state which is generated by said service presenting state data generating means, to the transmission data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification