Key encryption technology is a basic technique for protecting the secrecy of transmitted data among sensor nodes in wireless sensor networks. However, sensor nodes are inherently limited by insufficient hardware resources such as memory capacity and battery lifetime. As a result, few current key management schemes are appropriate for wireless sensor networks. This paper proposes a new key manag...

Clustering enables energy constrained wireless sensor networks to consume less battery power for routing the data packets. In order to achieve the key goal of prolonging the lifetime of sensor nodes besides avoiding undesired frequent topological changes, support from clustering mechanism is much appreciable. While proposing clustering mechanisms, attention is needed the way by which the sensor...

Wireless Sensor Networks; Differential Evolution; LEACH; Harmony Search; Modified Harmony Search; DESA Abstract The major concerns in Wireless Sensor Networks (WSN) are energy efficiency as they utilize small sized batteries, which can neither be replaced nor be recharged. Hence, the energy must be optimally utilized in such battery operated networks. One of the traditional approaches to improv...

Cluster-based routing protocols have special advantages that help enhance both scalability and efficiency of the routing protocol. Likewise, finding the best way to arrange clustering so as to maximize the network’s lifetime is now an important research topic in the field of wireless sensor networks. In this paper, we present an Energy-Aware, ClusterBased Routing Algorithm (ECRA) for wireless s...

As we all know, virtual MIMO technology is an efficient way for energy saving in wireless sensor networks (WSNs). The present virtual MIMO communication strategies in WSNs depend on cluster heads collecting and forwarding source data, which causes big energy consumption. Aiming at this problem, we propose a new virtual-MIMO communication strategy based on cooperative group (CG) in this paper, c...

A WSN is composed of a few hundreds to thousands of spatially distributed autonomous sensor nodes. This large-scale deployment of wireless sensor networks (WSNs) and the need for data aggregation necessitate efficient organization of the network topology for the purpose of balancing the load and prolonging the network lifetime. One of the prior issues in WSNs is how to save the energy consumpti...

A significant amount of research efforts have been done to improve the energy efficiency of wireless sensor network (WSN). However, not much has been done to optimize the Quality of Services (QoS) of WSN. Actually, energy efficiency should be jointly optimized with QoS to make WSN useful. In this paper, we develop an integrated adaptive wireless transmission system for WSN to meet the QoS requi...

Wireless sensor network (WSN) is a wireless network consists of base station and hundreds to thousands of small sensor nodes with sensing, computation, and wireless communications capabilities. Each sensor collects data from the monitored area and routes data back to the base station or sink. These sensor nodes have some constraints due to their limited energy, storage capacity and computing po...

Cluster Heads for Minimizing Energy Consumptions in Wireless Sensor Networks Yihui Li Gaoxi Xiao Gurpreet Singh Rashmi Gupta a School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, Republic of Singapore Abstract Clustering is a widely adopted energy-saving technique in wireless sensor networks (WSNs). In this paper, we study algorithms for finding the bes...

The wireless sensor networks consist of hundreds of inexpensive wireless nodes, each with some computational power and sensing capability, operational power and sensing capability, operating in an unattended mode. Clustering is an efficient approach to capitalize the energy of energy constraint sensor nodes in wireless sensor networks (WSNs). Low Energy Adaptive Clustering Hierarchy (LEACH) is ...