Server Bridging V2X and Cellular Communication Gaps
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Solution Overview
Problem
Existing communication systems, such as those described in Patent Literature 1, face challenges in transmitting and receiving information between vehicles and pedestrians equipped with different communication schemes, leading to gaps in information dissemination, especially when pedestrians are outside the communicable range of infrastructure devices.
Innovation Solution
A server and communication system that utilize a roadside device for receiving information from mobile bodies using a first wireless communication and manage information of terminal apparatuses with a second wireless communication capability, identifying the terminal apparatuses or roadside devices in proximity, and transmitting relevant information via the second wireless communication to ensure information reaches the intended recipients.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the second communication apparatus uses a limited wireless communication scheme (Wi-Fi or Bluetooth), then the device complexity is reduced, but the communication coverage and reliability deteriorate because pedestrians outside the communicable range cannot receive information
Solution Approach 1:
The server is designed to handle multiple communication schemes (V2X broadcast and unicast/multicast) within a single system, enabling it to serve both vehicles and pedestrians regardless of their communication capabilities. This multi-functionality resolves the contradiction by providing universal communication coverage without requiring each device to support all communication types.
Solution Approach 2:
The server acts as an intermediary between the second communication apparatus and terminal apparatuses. It receives information from the limited-range second communication apparatus, processes it, and redistributes it through appropriate communication channels (V2X broadcast or unicast/multicast) to reach pedestrians both within and outside the original communicable range, thereby extending coverage while maintaining system simplicity.
2Loss of information
If the infrastructure only transmits information within its own communicable range, then the loss of information is reduced for nearby devices, but the productivity of the communication system deteriorates because information cannot reach pedestrians farther away who still need it
Solution Approach 1:
The system transitions from a single-dimension broadcast model (limited to physical proximity) to a multi-dimensional communication approach. The server uses both spatial dimensions (V2X broadcast for nearby vehicles) and network dimensions (unicast/multicast through cellular networks for farther pedestrians), enabling information to reach recipients across different distance and technology dimensions simultaneously.
Solution Approach 2:
The server dynamically selects communication methods based on the recipient's location and device capabilities. For pedestrians within V2X range, it uses broadcast communication; for those outside, it switches to unicast or multicast through the cellular network. This dynamic adaptation ensures information reaches all necessary recipients efficiently without being constrained by fixed transmission ranges.
3Adaptability or versatility
If different communication schemes (V2X and Wi-Fi/Bluetooth) are used for vehicles and pedestrians, then the adaptability of the system is improved, but the device complexity and difficulty of integration worsen
Solution Approach 1:
The server merges the functionality of multiple communication schemes into a single integrated platform. It consolidates V2X broadcast reception, unicast/multicast transmission, information processing, and intelligent routing all in one system, reducing the overall complexity that would otherwise be distributed across multiple separate infrastructure devices.
Solution Approach 2:
The server autonomously manages the complexity of handling multiple communication schemes. It automatically detects which communication method to use based on recipient location and device type, processes information from different sources, and routes it through appropriate channels without requiring manual configuration or complex coordination between separate devices. This self-service capability absorbs the integration complexity centrally.
Data Source
AI summary
In one aspect, a reception means receives, from a roadside device, first information transmitted from a mobile body by using a first wireless communication. An identification means identifies, based on information of a terminal apparatus to be managed by an information management means, the terminal apparatus being located in the vicinity of the mobile body that has transmitted the first information. A transmission means transmits second information generated based on the first information, to the terminal apparatus identified by the identification means via a second wireless communication.