Vehicular Reactive Routing protocol

The Vehicular Reactive Routing (VRR) protocol is integrated with the WAVE stack and is embedded at the Logic Link Control layer.

To obtain a current neighbour location the WSA frame is modified to carry position information (incurs an additional 4 Bytes).

Route request and route reply demands are transmitted inside WSA frames (additional 40 Bytes) over the Control Channel and data acknowledgment and all application data (IPv6 packets) are sent over the Service Channel.

Due to these modifications, a route is firstly established over the CCH and afterwards data are transmitted over the SCH.

If a node has a route to destination, it creates broadcast frame RREP and set up backoff time depend on mobility behaviour (distance from a transmitter, speed and vector of motion).