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In this paper, we develop a Reliable Energy Adept Link-layer (REAL) protocol for power-constrained networks to provide reliable data transmissions among battery-operated wireless nodes. REAL dynamically performs error recovery with respect to the overall distortions in the system and the available energy at wireless nodes. REAL employs rate-adaptive low density parity check (LDPC) codes for error...
This paper presents the 'Poor Man's SIMO System' (PMSS) which combines two ideas, cooperative communication and diversity combination, to reduce packet losses over links in Wireless Sensor Networks (WSN). The work is based on the IEEE 802.15.4 standard and is distinct from previous works that apply the same concepts because it foregoes the need for any changes to mote hardware. We describe a Poor...
Knowledge of the error process and related channel parameters in wireless networks is invaluable and highly instrumental in a broad range of applications. Under the IEEE 802.15.4 Low Rate-Wireless Personal Area Networks (LR- WPAN) standard, compliant devices are capable of providing two pieces of information about the channel conditions along with each received packet, the Link Quality Indication...
We consider the distributed wireless sensor network (WSN) reliability problem with the introduction of minimal complexity at sensor nodes. Under the proposed scheme, intermediate sensor nodes, acting as relays to the base station, partially decode the information packets as they traverse the multi-hop wireless network. Nodes collaborate, in a distributed pair-wise manner to allocate the processing...
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