Vehicle Communication Device L2ID Generation Without Public Network
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Solution Overview
Problem
Existing wireless communication systems, such as those using LTE and NR, face challenges in facilitating information exchange between vehicles in areas without a public line, as they rely on server-provided L2IDs for Sidelink communication, which are unavailable in such scenarios.
Innovation Solution
A communication device equipped with a first and second wireless communication unit, an obtaining unit, a generation unit, a transmission unit, and a reception unit, capable of generating a communication identifier (L2ID) from received radio signals to enable Sidelink communication between vehicles, even in areas without a public line, using methods like Wi-Fi, Bluetooth, or cellular communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If L2ID is received from server device via public line, then communication identifier can be obtained reliably, but communication cannot be established in areas without public line
Solution Approach 1:
The patent introduces a roadside machine as an intermediary device that generates L2IDs locally and transmits them to vehicles via radio signals. This mediator enables vehicles to acquire communication identifiers without relying on server devices through public lines, thus solving the contradiction between reliable L2ID acquisition and communication availability in areas without public network access.
Solution Approach 2:
The roadside machine autonomously generates L2IDs and transmits them to vehicles without requiring connection to a server device or public network. This self-service mechanism allows the system to operate independently in areas without public line infrastructure, maintaining both reliability and adaptability.
2Adaptability or versatility
If multiple wireless communication units are equipped, then communication capability in various environments is improved, but device complexity increases
Solution Approach 1:
The communication device is designed with multiple wireless communication units that support different wireless communication schemes (first and second schemes). These units enable the device to adapt to various communication environments and protocols, achieving multi-functionality that covers both public network access and direct vehicle-to-vehicle communication without public network infrastructure.
Data Source
AI summary
A communication device mounted on a moving body, comprises: a first communication unit configured to receive a radio signal transmitted by a first wireless method; a second communication unit configured to perform wireless communication by a second wireless method. The communication device obtains an information element included in the radio signal received by the first communication unit; generates, by using the information element, a communication identifier to be used in the wireless communication by the second wireless method; adds the communication identifier to information concerning the moving body, and transmitting the information via the second communication unit; and receives a radio signal from an external device, to which the communication identifier is added, via the second communication unit.