In energy constrained Wireless Sensor Networks (WSN), network lifetime is considered as one of the most important metrics from the design point of view. In our paper, we have addressed the impact of a disperse node on network lifetime and have proposed a new design approach, Lifetime Enhancement for Disperse Networks (LEDN) to reduce its effect on a two tiered WSN. A mathematical analysis has a...

The objective of every sensor node in a sensor network is to send the sensed data in the phenomena to a sink node. The network lifetime is maximal, when the energy consumption of each node is uniform. Many routing protocols select an optimal path to increase the network lifetime in sensor networks. The energy of the nodes along this optimal path is consumed more, causing their early death. In t...

Network lifetime often needs to be prolonged in wireless networks with the limited energy. Mainly aiming at network lifetime optimization problem, we comprehensively consider the application scene with no network coding, bidirectional network coding, or interception network coding in random topology environments. The performance of network coding is researched on a random topology network. Comb...

We investigate the problem of energy-efficient broadcast routing over stationary wireless adhoc networks where the host is not mobile. We define the lifetime of a network as the duration of time from the network initialization until the first node failure due to the battery exhaustion. We provide a globally optimal solution to the problem of maximizing a static network lifetime through a graph ...

A sensor network consists of many low-cost, low-power, and multifunctional sensor nodes. One of the most important issues in sensor networks is to increase network lifetime, and there have been researches on the problem. In this paper, we propose a routing mechanism to prolong network lifetime, in which each node adjusts its transmission power to send data to its neighbors. We model the energy ...

Network lifetime maximization is a critical problem for longterm data collection in wireless sensor networks. For large-scale networks, distributed and self-adaptive solutions are highly desired. In this paper, we investigate how to optimize the network lifetime by a localized method. Specifically, the network lifetime maximization problem is converted to a localized cost-balancing problem with...

One of the main design constraints in mobile adhoc networks (MANETs) is that they are power constrained. Hence, every effort is to be channeled towards reducing power. More precisely, network lifetime is a key design metric in MANETs. Since every node has to perform the functions of a router, if some nodes die early due to lack of energy, it will not be possible for other nodes to communicate w...

The efficient node-energy utilization in wireless sensor networks has been studied because sensor nodes operate with limited battery power. To extend the lifetime of the wireless sensor networks, we reduced the node energy consumption of the overall network while maintaining all sensors balanced node power use. Since a large number of sensor nodes are densely deployed and interoperated in wirel...

This research work proposes a mathematical model for the lifetime of wireless sensor networks (WSN). It also proposes an energy efficient routing algorithm for WSN called hierarchical energy tree based routing algorithm (HETRA) based on hierarchical energy tree constructed using the available energy in each node. The energy efficiency is further augmented by reducing the packet drops using expo...