In wireless sensor network the bad distribution for cluster head was not taken into account in traditional clustering algorithm such as LEACH algorithm. However the distribution uniformity for the cluster head in wireless sensor networks is very critical, for the better cluster head distribution could effectively save the communication cost and prolong the the lifespan of the network. The math ...

This paper proposes a centralized algorithm for cluster-head-selection in a mobile wireless sensor network. Before execution of algorithm in each round, Base station runs centralized localization algorithm whereby sensors update their locations to base station and accordingly Base station performs dynamic clustering. Afterwards Base station runs CA-MWSN for cluster-head-selection. The proposed ...

Hierarchical Clustering is a procedure of cluster analysis which aims to construct a hierarchy of clusters. There are two kinds of hierarchical clustering i.e. Agglomerative, which is a bottom – up approach, where all the observations start in its own cluster, and pairs of clusters are merged moving up the hierarchy, and the other one is divisive, which is a top down approach, where each observ...

Flat wireless multi-hops architectures are not scalable. In order to overcome this major drawback, hierarchical routing is introduced since it is found to be more effective. The main challenge in hierarchical routing is to group nodes into clusters. Each cluster is represented by its cluster head. Most of conventional methods use either the connectivity (degree) or the node Id to perform the cl...

In recent years, the applications of Wireless Sensor Networks (WSNs) have grown enormously. In WSNs there is one mechanism used to enlarge the lifespan of network and provide more efficient functioning procedures that is clustering. Clustering is a process to subdivide the sensing field of sensor network into number of clusters. Each cluster selects a leader called cluster head. A cluster head ...

Secure data transmission and energy efficiency is one of the most prominent issues for wireless sensor networks (WSNs). In this paper, we present a secure and trustable hierarchical routing (STHR) scheme based on active detection model for large scale WSNs. The main objective of this paper is that it evaluates the nodal trust very quickly and avoids black holes through number of active detectio...

In wireless sensor network (WSN), sensor nodes are partitioned into clusters in order to gather information more efficiently in terms of energy consumption. In clustered networks, each node transmits acquired data to a cluster-head which the nodes belong to. After a cluster-head collects all the data from member nodes, it transmits the data to the base station (sink) in aggregated manner. This ...

In this paper, we study the clustering problem for crossroads in Vehicular Ad hoc Networks (VANETs). Considering the load balancing of both the whole network and each cluster based on the multiple metrics, an Enhanced Low Overhead and Stable Clustering (EnLOSC) scheme is presented to ensure the stability and security of clusters and to reduce the communication overhead in this case. The propose...

Mobile Ad Hoc Network (MANET) consists of dynamic topology as nodes in the network are mobile, and connected via wireless links. Nodes within the cluster communicate directly. However, nodes communicate outside the cluster through a centralized node that is called a Cluster Head Gateway (CHG) [1]. As the number of nodes increases complexity of MANET increases in various issues. Ad hoc wireless ...

Node compromise is a serious threat in wireless sensor networks. Particular in networks which are organized in clusters, nodes acting as cluster heads for many cluster nodes are a valuable target for an adversary. We present two efficient hardware-based attestation protocols for detecting compromised cluster heads. Cluster heads are equipped with a Trusted Platform Module and possess much more ...