The paper presents a simulation-based study of topological characteristics of a mobile wireless ad-hoc network, namely, connectivity, coverage and diameter. Knowing these characteristics of the network aids in design of new distributed protocols as well as in predicting the performance and robustness of distributed protocols running on the network. The nodes exhibit intelligent mobility pattern...

According to Nielsen (1990), "hypertext is non-sequential writing: a directed graph, where each node contains some amount of text or other information. The nodes are connected by directed links. In most hypertext systems, a node may have several out-going links, each of them is then associated with some smaller part of the node, called an anchor. When users activate an anchor, they follow the a...

In Underwater Wireless Sensor Network, for mobile target localization schemes, there exists long propagation delay of sensor nodes' messages. Further, the flexibility node schemes to adapt in harsh underwater environment is major issue. As one principal aspects that disturb time harmonisation nodes communication. It must be adjusted attain precise and accurate localization. this article, we pro...

In order to reduce energy-consumption and hardware investment in wireless sensor networks, an improved DV-Hop localization algorithm based on energy-saving non-ranging optimization is proposed. In this algorithm, only one anchor node broadcasts its position coordinate information to other node, thus greatly reducing the energy consumption of the node. Non-ranging energy-saving optimization algo...

As the demand for wireless mobile devices capable of executing real-time applications increases and as the number of mobility users grows, the Mobile IP has necessitated the development of better handoff techniques, for providing seamless handoff, namely, a packet lossless Quality of Service (QoS) guarantee. The Hierarchical Mobile IPv6 (HMIPv6), is to enhance the Mobile IPv6, is designed to re...

This paper analyzes the source of the localization error in the least square localization (LSL) algorithm, and introduces the thought of distance clustering to select the reference anchor nodes, and gives a new principle to select the benchmark anchor node. Based on the above analysis, this paper proposes an improved least square localization algorithm based on the distance clustering and the s...

Abstract As localization represents the main core of various wireless sensor network applications, several algorithms have been suggested in research. In this article, we put forward an iterative bounding box algorithm enhanced by a Kalman filter to refine unknown node’s estimated position. fact, research efforts are currently progress extend 2D positioning WSNs 3D that reflects reality and mos...

This paper proposes a novel fingerprinting localization scheme, called FLCDA (Fingerprinting Localization with Cruciate Directional Antennas), using only one anchor node equipped with four directional antennas whose orientations are perpendicular to adjacent ones. The proposed FLCDA consists of two phases. In the RSSI gathering phase, a sensor node is placed at reference positions to send signa...

Wireless sensor networks (WSNs) with nodes spreading in a target area have abilities of sensing, computing, and communication. We adopted a range-free Color-theory based Dynamic Localization, CDL[1] [1][1], to help identify each sensor node’s location. Since sensor nodes are battery-powered, we propose a Color-theory-based Energy Efficient Routing (CEER) algorithm to prolong the life time of ea...