Onboard narrow-band wireless communication device and side of the road-to-vehicle narrow-band wireless communication system

A vehicle-side narrow-band wireless communication device, comprising: a wireless communication unit for receiving, by a particular narrow-band communication from the roadside information relating to a branch which is supplied from a roadside communication device having a communication area that covers a part of a geographical area within a predetermined distance of the junction; an operation condition detecting unit for detecting an operating condition of a host vehicle; a parameter management unit for managing parameters with respect to an HMI; an information storage / management section for storing and managing the on-road information from the wireless communication unit and operating condition information from the operating condition detecting unit; an information provision determination unit for determining whether or not information can be provided, wherein the determination is made by using a result of a determination of a collision risk on the basis of the road-side information, and which is obtained from the information storage / management portion of the operating condition information; an HMI output control unit for controlling an HMI output based on a determination result from the information provision determination unit and environment information related to a Abzweigungsnachbarschaft obtained from the parameter management unit; and ...