Mobile Ad-hoc Network (MANET) is the self organizing collection of mobile nodes. The communication in MANET is done via a wireless media. Ad hoc wireless networks have massive commercial and military potential because of their mobility support. Due to demanding real time multimedia applications, Quality of Services (QoS) support in such infrastructure less networks have become essential. QoS ro...

Rapidly and robustly disseminating safety messages is an important goal for vehicle-to-vehicle communications. When multiple vehicles receive an alert message, packet collisions may occur if they rebroadcast the message simultaneously. Due to the broadcast nature of safety messages, acknowledgement on the reception of packets is difficult, and such collision leads to nonrecoverable failed deliv...

Vehicular ad hoc networks are an emerging technology with an extensive capability in various applications including vehicles safety, traffic management and intelligent transportation systems. Considering the high mobility of vehicles and their inhomogeneous distributions, designing an efficient routing protocol seems necessary. Given the fact that a road is crowded at some sections and is not c...

In a multihop wireless network, each node has a transmission radius and is able to send a message to one of its neighbors (one-to-one) or all of its neighbors (oneto-all) that are located within the radius. In a broadcasting task, a source node sends the same message to all the nodes in the network. Some existing solutions apply rebroadcasting from each clusterhead or border node in a clustered...

In a multihop wireless network, each node has a transmission radius and is able to send a message to one of its neighbors (one-to-one) or all of its neighbors (one-to-all) that are located within the radius. In a broadcasting task, a source node sends the same message to all the nodes in the network. Some existing solutions apply rebroadcasting from each clusterhead or border node in a clustere...

In a multihop wireless network, each node has a transmission radius and is able to send a message to one of its neighbors (one-to-one) or all of its neighbors (oneto-all) that are located within the radius. In a broadcasting task, a source node sends the same message to all the nodes in the network. Some existing solutions apply rebroadcasting from each clusterhead or border node in a clustered...

This article describes a simulation model of a national network of television broadcasting stations. The performance of a station depends on its sitting and its antenna, on its radiated power and frequency, and on surrounding terrain and electromagnetic environment. All these factors can be analysed using the simulation model. Simulation can help in the maintenance of the existing television st...

Faster and more reliable connection establishment is the primary purpose of periodic safety broadcasting in VANETs. For this purpose we propose a sublayer in the application layer to increase the reliability of safety applications. Our proposed method uses several rebroadcasting schemes safety messages, which considerably improves the overall reliability. It also handles the synchronized collis...

Vehicular Ad-Hoc Network (VANET) is an prominent new technology develop in ad hoc network, wireless local area network i.e WLAN and cellular technology to achieve intelligent intervehicle communications ,improve road traffic safety and improve the efficiency .Within a given geographical region broadcast based geocast enable to provide efficient data dissemination to vehicle. Broadcast based geo...