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Low-latency data delivery is an important requirement for achieving effective monitoring through wireless sensor networks. When sensor nodes employ duty cycling, sending a message along the shortest path, however, does not necessarily result in minimum delay. In this paper, we first study the lowest latency path problem, i.e., the characteristics of a path with minimum delay that connects a source...
Inexpensive sensors capable of significant computation and wireless communication with limited energy resources are available. Once deployed, the small sensor nodes are usually inaccessible to the user, and thus replacement of the energy source is not feasible. Hence, energy efficiency is a key design issue that needs to be enhanced in order to improve the life span of network. Several network layer...
A primary criterion of designing wireless sensor networks is energy efficiency. Focused on the energy problem of routing protocol in wireless sensor networks, we must mention to the clustering routing protocol. LEACH is one of the first clustering routing algorithms for sensor networks, and it is able to increase the network lifetime. However, it selects a cluster head based on random probability...
A wireless sensor network (WSN) consists of autonomous devices equipped with sensors to cooperatively monitor certain physical or environmental phenomena, such as temperature, vibration, pressure, or pollutants, at different locations. These devices called sensor nodes (SNs) have sensing, computation and wireless communication capabilities. One of the significant features of SNs is their limited battery...
In a wireless sensor-actuator network (WSAN), sensor nodes deliver messages with sensed values to only nearby nodes due to weak radio. Messages are forwarded by sensor nodes to an actuator node by a routing protocol like a flooding protocol. In the redundant data transmission (RT) protocol, a sensor node sends a message with not only its sensed value but also sensed values received from other sensor...
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