P4-NEON: Multihoming in Software Defined Network VANETs with P4

Providing Quality of Service (QoS) in Vehicular ad hoc networks (VANETs) is challenging, due to the numerous connections that vehicles can maintain, termed multihoming setups. P4-NEON employs a multi-criteria decision-making algorithm to improve multihoming in VANETs by leveraging segment routing within the IPv6 data plane. The entire data plane is programmed with P4 and uses In-band Network Telemetry to collect relevant performance data of ongoing data flows. This information improves Quality of Service decisions, such as minimizing delay and packet loss. P4-NEON is an all-encompassing solution featuring visualization tools for presenting live network statistics and active data flow paths. By employing segment routing within the IPv6 data plane, P4-NEON achieved better load balancing in the scenario studied, effectively lowered the average delay for Emergency Flows relative to others, and decreased the occurrence of out-of-order packets, all while maintaining other performance metrics evaluated during testing.