Among Many fundamental communication primitives in mobile ad hoc networks, 1-hop broadcast plays an significant role in which a message from the source node is delivered to all nodes within the source node's transmission range. Although the importance of it, 1-hop broadcast is not easy to accomplish due to collisions in wireless networks known as Hidden Terminal problem. This paper present...

Among Many fundamental communication primitives in mobile ad hoc networks, 1-hop broadcast plays an significant role in which a message from the source node is delivered to all nodes within the source node's transmission range. Although the importance of it, 1-hop broadcast is not easy to accomplish due to collisions in wireless networks known as Hidden Terminal problem. This paper present...

WLANs have become increasingly popular and widely deployed. The MAC protocol is one of the important technology of the WLANs and affects communication efficiency directly. In this paper, focusing on MAC protocol, we propose a novel protocol that network nodes dynamically optimize their backoff process to achieve high throughput in multi-hop wireless networks. Distributed model MAC protocol has ...

This paper presents a neural network model with a variable structure, which is trained by genetic algorithm (CA). The proposed neural network consists of a Neural Network with a Node-to-Node Relationship (PR) and a Network Switch Controller (NSC). In the N'R, a modified neuron model with two activation functions in the hidden layer, and switches in its links are introduced. The NSC controls the...

In this paper we propose a Directional Antenna Medium Access (DAMA) protocol that takes advantage of the benefits offered by directional antennas and is best suited for sparsely distributed networks. A large portion of DAMA has been inspired by the IEEE 802.11 MAC, with major enhancements including a new neighbor discovery scheme, and an optimized circular directional transmission of RTS and CT...

In this work we consider the problem of simultaneously classifying sensor types and estimating hidden parameters in a network of sensors subject to gossip-like communication limitations. In particular, we consider a network of scalar noisy sensors which measure a common unknown parameter. We assume that a fraction of the nodes is subject to the same (but possibly unknown) offset. The goal for e...

Ad hoc networks are characterized by dynamic topology caused by node mobility, multihop wireless connectivity and channel non deterministic behaviour (Interference, multipath, hidden and exposed node problem makes the wireless channel very difficult to predict)This behaviour of Ad hoc networks must be analyzed in detail as a result of pairing of the selected MAC and Routing protocols. We focus ...

one of the main challenges in wireless sensor network is energy problem and life cycle of nodes in networks. several methods can be used for increasing life cycle of nodes. one of these methods is load balancing in nodes while transmitting data from source to destination. directed diffusion algorithm is one of declared methods in wireless sensor networks which is data-oriented algorithm. direct...

Information spreads across social and technological networks, but often the network structures are hidden and we only observe the traces left by the diffusion processes, called cascades. It is known that, under a popular continuous-time diffusion model, as long as the model parameters satisfy a natural incoherence condition, it is possible to recover the correct network structure with high prob...

We present a novel parametric message representation for belief propagation (BP) that provides a novel grid-based way to address the cooperative localization problem in wireless networks. The proposed Grid-BP approach allows faster calculations than non-parametric representations and works well with existing grid-based coordinate systems, e.g., NATO’s military grid reference system (MGRS). This...