Patent ID: 8665816

Claim:
A wireless communication method in a traffic system comprising a wireless base station as a roadside device and a plurality of wireless terminals as on-vehicle devices, the wireless communication method comprising: the plurality of on-vehicle devices respectively sending a plurality of allocation requests for a wireless resource to the roadside device; the roadside device, in response to receiving the plurality of allocation requests, allocating a roadside-vehicle resource that is a wireless resource for roadside-vehicle communication between the roadside device and each of the plurality of on-vehicle devices and an inter-vehicle resource that is a wireless resource for inter-vehicle communication between on-vehicle devices of the plurality of on-vehicle devices, and sending allocation information identifying the allocated roadside-vehicle resource and the allocated inter-vehicle resource to the plurality of on-vehicle devices; and each of the plurality of on-vehicle devices carrying out the roadside-vehicle communication with the roadside device using the roadside-vehicle resource identified with the allocation information received from the roadside device, and carrying out the inter-vehicle communication with other on-vehicle device using the inter-vehicle resource identified with the allocation information, wherein the wireless resource is a communication domain defined by frequency and time, a downlink roadside-vehicle communication domain from the roadside device to the on-vehicle device, an inter-vehicle communication domain for the inter-vehicle communication, and an uplink roadside-vehicle communication domain from the on-vehicle device to the roadside device are time-division multiplexed such that the downlink roadside-vehicle communication domain, the inter-vehicle communication domain, and the uplink roadside-vehicle communication domain are arranged in the wireless resource along a time axis in the order of the downlink roadside-vehicle communication domain, the inter-vehicle communication domain and the uplink roadside-vehicle communication domain, and the wireless communication method further comprises: each of the plurality of on-vehicle devices sending information on a local vehicle using a local on-vehicle device transmission domain allocated to a local on-vehicle device among a plurality of on-vehicle device transmission domains, and receiving information sent by another on-vehicle device using another on-vehicle device transmission domain among the plurality of on-vehicle device transmission domains except for the local on-vehicle device transmission domain, the plurality of on-vehicle device transmission domains being obtained by time division on the inter-vehicle communication domain.