One-Shot Transmission for V2X Messaging

Abstract

Researchers at the University of Central Florida have developed a new algorithm for cellular vehicle-to-everything communication (Cellular-V2X or CV2X). Vehicle-to-everything (V2X) communication allows vehicles to exchange information with other vehicles, as well as with infrastructure, pedestrians, networks, and other devices. CV2X relies on a semi-persistent scheduling algorithm for resource allocation in the channel so that multiple nodes can access the channel with minimal collision. An issue with CV2X is that some of the collisions experience prolonged durations. The UCF invention adds a new algorithm to CV2X to break the prolonged collision durations and improve latency in communication.

Technical Details

The UCF invention is a system that includes a transceiver and a controller embedded within V2X-enabled vehicles and roadside units that communicate with V2X-vehicles. The system does the following:

• Transmits a sequence of connected messages using Semi-Persistent Scheduling (SPS) of a predefined period
• Sets a random value for a 1-shot duration timer. The random value is between a minimum and a maximum multiple of the predefined period
• After the 1-shot duration timer expires, allocates 1-shot resources for a 1-shot transmission, independent of SPS-allocated resources of the SPS
• Transmits a next packet of the sequence of connected messages as a 1-shot message using the 1-shot resources instead of using the SPS-allocated resources of the SPS

Stage of Development

Prototype available.

Benefit

Market Application