Mansi Ramakrishnan Thoppian

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— In a Cognitive Radio (CR) network, MAC-layer configuration involves determining a common set of channels to facilitate communication among participating nodes. Further, the availability of multiple channels and frequent channel switches add to the complexity of route selection. Knowledge of the global network topology can be used to solve the(More)
Cognitive radios (CR) have the ability to dynamically adapt to local spectrum availability. In a network comprised of CR-enabled devices, layer-2 auto-configuration involves determining a common set of channels to facilitate communication among participating nodes. This is a unique challenge as nodes in the CR network may be unaware of (a) their neighbors(More)
Cognitive radios £ C R¤ have the ability to dynamically adapt to local spectrum availability. In a network comprised of CR-enabled devices, layer-¥ auto-configuration involves determining a common set of channels £ a lso referred to as the global channel set¤ to facilitate communication among participating nodes. This is a unique challenge as nodes in the(More)
The development of modern devices with wireless capability such as laptops, mobile phones, PDAs… makes the applications for Mobile Ad-hoc Networks (MANET) more promising. However, because of its " ad-hoc " property, it is not easy to study and predict the performance of the applications when implementing for such networks. Some systems have very strict(More)
A Mobile Ad hoc NETwork (MANET) is a group of mobile nodes that form a multi-hop wireless network. The topology of the network can change randomly due to unpredictable mobility of nodes and propagation characteristics. Previously, it was assumed that the nodes in the network were assigned IP addresses a priori. This may not be feasible as nodes can enter(More)
For decades, simulations have been the means to study the behavior and analyze the performance of engineering, computer science, and military applications. In the sequential discrete-event driven simulations, the events are executed sequentially in an increasing order of their timestamp. Simulation of large complex applications using sequential simulators(More)
Figure 1: Sample network after cluster formation We present a cluster-based network control mechanism in which the underlying network is divided into disjoint clusters of nodes (fig. 1). When number of clusters is one, the mechanism behaves like fixed-alternate path routing; when equal to number of nodes, it becomes adaptive routing. Clusters consist of(More)