Patent ID: 11140595

Abstract:
Disclosed is a design and implementation of a Wi-Fi based network (e.g., roadside hotspot network designed to operate at vehicular speeds and picocell, meter-sized, cells). The disclosed access points (APs) make delivery decisions to the vehicular clients they serve at millisecond-level granularities, exploiting path diversity in roadside networks. In order to accomplish this, buffer management algorithms are employed that allow participating APs to manage each other's queues, rapidly quenching each other's transmissions and flushing each other's queues. An example embodiment of the disclosed approach employs an eight-AP network alongside a nearby road, and was evaluated with mobile clients moving at up to 25 mph. Depending on mobility speed, the disclosed approach achieves a 2.4-4.7 times TCP throughput improvement over a baseline fast handover protocol that captures the state of the art in Wi-Fi roaming, the IEEE 802.11k and 802.11r standards.