Proxy Safety Messaging for V2X Platooning Congestion
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Solution Overview
Problem
The congestion of vehicle-to-anything (V2X) safety traffic channels, particularly exacerbated by platooning vehicles using cellular-V2X (C-V2X) technology, as it leads to an unnecessary load on the ITS channel, with current application layer congestion control failing to safely address congestion during platooning scenarios.
Innovation Solution
Designating one or more vehicles within a platoon to broadcast proxy basic safety communications on behalf of the entire platoon, reducing the frequency and power of individual vehicle broadcasts, thereby alleviating channel congestion while maintaining essential safety information dissemination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all vehicles in a platoon broadcast basic safety communications at standard power levels, then safety information is fully disseminated, but channel congestion increases significantly
Solution Approach 1:
Multiple vehicles in the platoon are merged into a single communication entity by designating one vehicle as the proxy. The proxy vehicle consolidates safety information from all platoon members and broadcasts it on behalf of the entire group, reducing the number of transmissions from N vehicles to 1 transmission while maintaining comprehensive safety information coverage.
Solution Approach 2:
The designated proxy vehicle performs multiple functions: it collects safety information from all platoon members, processes and consolidates this data, and broadcasts the aggregated information to external vehicles. This single vehicle effectively replaces the communication functions of all other platoon vehicles, providing universal coverage for the entire platoon.
2Object-generated harmful factors
If message transmission frequency is reduced to control congestion, then channel load decreases, but safety monitoring capability deteriorates
Solution Approach 1:
The proxy vehicle merges multiple information streams from all platoon members into a single consolidated broadcast message. Instead of each vehicle transmitting individually at reduced frequency, the proxy aggregates position, speed, and status data from all vehicles and transmits this comprehensive information once, maintaining safety monitoring capability while reducing channel load by a factor of N.
3Reliability
If proxy vehicles broadcast at higher power levels, then safety message reach is improved, but energy consumption increases
Solution Approach 1:
The system merges the communication efforts of all platoon vehicles into a single proxy transmission. Although the proxy broadcasts at higher power to ensure adequate reach, this energy consumption is offset by eliminating the need for N-1 other vehicles to transmit at all. The total energy consumption is reduced from the sum of N individual transmissions to a single enhanced transmission.
Data Source
AI summary
Various embodiments include methods that may be implementing in a computing system within vehicles for supporting communicating proxy basic safety communications while operating within a platoon of vehicles to control congestion on frequencies used for basic safety communications. In various embodiments, while a vehicle is operating as a designated platoon vehicle, the computing system may generate a proxy basic safety communication including position and dimension information of the platoon as a whole, and broadcast the proxy basic safety communication on behalf of vehicles in the platoon. The proxy basic safety communication may include positions of certain vehicles within and dimensions of the platoon. While in a platoon but not operating as the designated platoon vehicle, the computing system may not broadcast basic safety communications or broadcast such communications at low power.