An ad-hoc network of wireless static nodes is considered as it arises in a rapidly deployed, sensor based, monitoring system. Information is generated in certain nodes and needs to reach some designated gateway node. Each node may adjust its power within a certain range that determines the set of possible one hop away neighbours. Traffic forwarding through multiple hops is employed when the int...

In wireless sensor networks, system architectures and applications are designed to consider both resource constraints and scalability, because such networks are composed of numerous sensor nodes with various sensors and actuators, small memories, low-power microprocessors, radio modules, and batteries. Clustering routing protocols based on data aggregation schemes aimed at minimizing packet num...

Sensor Network is real time network with specification of environment specific critical nodes. To provide the regular monitoring and uninterrupted battery backup, it is required to track the nodes continuously. In mobile sensor network, such kind of target node tracking is more critical. In this present work, multi-featured and fuzzy trained method is defined for target tracking. At the earlier...

A grid computing system allows a large complex computing task to efficiently utilize high computing resources by splitting the task into many compute processes to be distributed and executed in parallel at many grid nodes. Under such paradigm, the system fault tolerance is the major issue as the failure of one grid node results in the task failure. Most fault tolerance techniques for a grid com...

This paper presents the implementation and performance evaluation of our proposed BGP-GCR+ routing architecture via simulation in ns-2. BGP-GCR+ consists of three components: (1) a two-level hierarchical, non-overlapped, one-node fault-tolerant routing algorithm for large-scale mobile ad-hoc networks (MANETs), (2) an IPv6-based address stateless auto-configuration scheme, and (3) procedures at ...

In this paper a new methodology to evaluate the protection performance of some existing mechanisms for establishing quality of service network paths with protection is presented. In order to evaluate the protection degree of a network, different components, such as protection parameters (packet loss and restoration time), or network parameters and constraints (link failure probability and netwo...

Recent advances in wavelength-division-multiplexing (WDM) technology are expected to facilitate bandwidth-intensive multicast applications. However, a single fiber (bundle) cut on such a network can disrupt the transmission of information to several destination nodes on a “light tree”-based multicast session. Thus, it is imperative to protect multicast sessions e.g., by reserving resources alon...

The most important aspect of cognitive radio (CR) networks is to search, scan, and access the control channel to advertise the free channel list (FCL) amongst the participating CR nodes. Subsequent communication could not take place until there is an access to a well-known and agreed upon control channel to dialogue the initial configuration. In this paper, a novel protocol for searching, scann...

Mobile sensor networks rely heavily on inter-sensor connectivity for collection of data. Nodes in these networks monitor different regions of an area of interest and collectively present a global overview of some monitored activities or phenomena. A failure of a sensor leads to loss of connectivity and may cause partitioning of the network into disjoint segments. A number of approaches have bee...

─ Node-disjoint routing in MANETs is very essential to reduce the end-to-end packet delay and increase the packet delivery ratio. AODV (Ad Hoc On-demand Multipath Distance Vector) which is widely used for MANETs creates single-path route between a pair of source and destination nodes. Node disjoint paths may have worst performance then single path if they interfere with each other due to the br...