Many-to-one communication protocol for wireless sensor networks

Abstract

This paper proposes a novel communication protocol, called Many-to-One Sensors-to-Sink (MOSS), tailored to wireless sensor networks (WSNs). It exploits the unique sensors-to-sink traffic pattern to realize low-overhead medium access and lowlatency sensors-to-sink routing paths. In conventional schedule-based MAC protocols such as S-MAC, sensor nodes in the proximity of the event generate reports simultaneously, causing unreliable and unpredictable performance during a brief but critical period of time when an event of interest occurs. MOSS is based on time division multiple access (TDMA) that avoids energy waste due to collisions, idle listening and overhearing and avoids unreliable behavior mentioned above. A small test-bed consisting of 12 TelosB motes as well as extensive simulation study based on ns-2 have shown that MOSS reduces the sensor-to-sink latency by as much as energy compared to conventional TDMA algorithms. collision-free schedule; channel capture. 50.5% while consuming only 12.8∼19.2% of

Heuristic strategies for assessing wireless sensor network resiliency: an event-based formal approach

“…Examples of such applications are health monitoring (Hao and Foster, 2008), Ambient Intelligent (AmI) systems (Coronato and De Pietro, 2010) and environmental monitoring (Xu et al, 2004). The correct operation of a WSN is affected by several undesired events, such as the crash of a node due to the cheap hardware adopted (Cinque et al, 2012b), battery exhaustion (El Abdellaoui et al, 2012) and the unreliability of the wireless medium (Yu et al, 2012). These, in turn, may isolate whole portions of the network or cause packets to be lost during their traversal to the destination.…”