Vehicle Relay Messaging for Off-Network Autonomous Information Delivery
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Solution Overview
Problem
Autonomous vehicles outside the service area of a cellular network or not subscribed to a cellular connection service may not receive critical information, such as traffic data or safety hazard alerts, leading to hazardous driving conditions.
Innovation Solution
A system where a first autonomous vehicle receives information from a base station via LTE multicast and relays it to other vehicles within its direct communication range, using LTE PC5 interface, ensuring information delivery even if the recipient vehicles are outside the base station's service area or not subscribed, thereby reducing communication and resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a base station transmits information via cellular network, then information can be delivered to subscribed vehicles, but vehicles outside service area or not subscribed cannot receive the information
Solution Approach 1:
The patent introduces relay vehicles as intermediary nodes that receive information from the cellular network and forward it to other vehicles via direct communication interfaces (PC5). This mediator approach extends service coverage to vehicles outside the base station's service area or without cellular subscriptions, resolving the contradiction between reliable information delivery and service coverage range.
2Reliability
If base station transmits information to all vehicles, then all vehicles can receive information, but network resources and processor usage increase significantly
Solution Approach 1:
The patent segments the information distribution task by having the base station transmit information only to relay vehicles within its service area, rather than attempting to reach all vehicles directly. The relay vehicles then segment the forwarding task among themselves using direct communication, reducing overall network resource consumption while maintaining broad information delivery coverage.
Solution Approach 2:
Relay vehicles autonomously perform the function of information forwarding to other vehicles without requiring base station intervention for each transmission. This self-service mechanism reduces the burden on network resources by leveraging the capabilities of vehicles already equipped with direct communication interfaces.
3Reliability
If relay vehicles forward information to all neighboring vehicles, then information coverage is maximized, but communication overhead and processing complexity increase
Solution Approach 1:
The patent implements a simplified relay mechanism where relay vehicles forward information to a subset of neighboring vehicles rather than attempting comprehensive multi-hop routing to all possible recipients. This partial action approach achieves sufficient information distribution coverage while avoiding the complexity of optimal routing algorithms and extensive communication overhead.
Data Source
AI summary
A device receives a first message indicating that content was transmitted to a telemetry device, generates and sends a second message to a remote device. The device receives a third message from the remote device including first information identifying the remote device and second information identifying a neighbor device of the remote device, and generates and sends a fourth message to the remote device, causing the remote device to download the content via a link and send the fourth message to the neighbor device, which causes the neighbor device to download the content via the link. The device receives a fifth message from the remote device including third information indicating whether the remote device and the neighbor device downloaded the content via the link, and generates and sends, to the base station, a sixth message including the first information, the second information, and the third information.