An Asynchronous Anycast Protocol Resilient to Changes in Communication Channel

Autor: Tales Heimfarth, Gustavo Carvalho Souza, João Carlos Giacomin
Rok vydání: 2021
Předmět:
Zdroj: Wireless Personal Communications. 120:3243-3263
ISSN: 1572-834X
0929-6212
Popis: This paper presents RAP-MAC (resilient advanced preamble medium access control), a novel asynchronous anycast MAC protocol designed for wireless sensor networks (WSNs). RAP-MAC is a low latency and low energy consumption protocol, which employs duty-cycling as the main strategy for energy savings. It is resilient to topology changes due to disconnections caused by noise and interference in radio links, being able to circumvent roles in communication routes. Latency reduction is obtained with a dual-phase message sending technique. In the first phase a sequence of RTS control messages is sent to discover the route towards the destination node, while the wake up times of the routing nodes are staggered. In the second phase, DATA message is transmitted by routing nodes, synchronously, some hops after RTS. Simultaneous RTS and DATA transmissions reduce the latency, with no extra energy consumption. An anycast communication pattern is employed to accelerate RTS propagation. The sender node selects a group of neighbors as candidates to relay the message, according to their proximity to destination node and the SINR (signal to interference and noise ratio) perceived by each one. In order to apprise RAP-MAC performance, we compared it to X-MAC and PAX-MAC protocols. Simulation results showed that the new protocol outperforms the other two both in latency and energy consumption.
Databáze: OpenAIRE