The vehicular ad hoc networks(VANETs) presents uneven node density, fast moving speed and dynamic topology change etc. In order to improve the reliability of VANETs in information broadcasting and reduce the redundancy of multi-hop broadcast, a protocol based on the clustering position-competition of vehicular ad hoc networks is hereby proposed. Furthermore, the concept of connectivity-stabilit...

The evolution in satellite digital broadcast has lead to wide variety of Internet and multimedia applications even in few first years of service launch. DVB is expected to be prominent television broadcast standard for next decades also in terrestrial television. While being member of same protocol family, terrestrial digital television (DVB-T) sets quite different constraints on performance th...

Broadcast communication is a dominant communication pattern in WSN. As a major security concern, the broadcast source authentication is needed to mitigate impersonation of a broadcast source, modifications of its broadcasted data, or depletion of the limited energy of sensors caused by an attacker injecting useless broadcast traffic. Several Broadcast Source Authentication Protocols (BSAPs) wer...

We present a possible attack on time synchronization protocols which protect their broadcast or multicast messages with the TESLA protocol or one of its variants. We continue by presenting a customization of the TESLA mechanism that mitigates the aforementioned vulnerability and enables it to secure broadcast and multicast based time synchronization protocols.

A cache consistency scheme is presented for a class of multiprocessors based on a hierarchy of rings. By taking advantage of the natural broadcast and ordering properties of rings, cache consistency is achieved via a simple, selective-broadcast based protocol requiring no complex hardware. Using address-trace driven simulations of the Hector shared-memory multiprocessor, it is shown that the sc...

Using directional antennas to conserve bandwidth and energy consumption in ad hoc networks is becoming popular in recent years. However, applications of directional antennas for broadcasting have been limited. We propose a novel broadcast protocol called directional self-pruning (DSP) for ad hoc networks using directional antennas. DSP is a non-trivial generalization of an existing localized de...

A new single channel, TDMA-based broadcast scheduling protocol, termed the Five-Phase Reservation Protocol (FPRP), is presented for mobile ad hoc networks. The protocol jointly and simultaneously performs the tasks of channel access and node broadcast scheduling. The protocol allows nodes to make reservations within TDMA broadcast schedules. It employs a contention-based mechanism with which no...

Mobile ad-hoc networks are making a new class of mobile applications feasible. They benefit from the fast deployment and reconfiguration of the networks, are mainly characterized by the need to support many-to-many interaction schema within groups of cooperating mobile hosts and are likely to use replication of data objects to achieve performances and high data availability. This strong group o...

Vehicular Ad hoc Network (VANET), a subclass of mobile ad hoc networks (MANETs), is a promising approach for the intelligent transportation system (ITS). The design of routing protocols in VANETs is important and necessary issue for support the smart ITS. The key difference of VANET and MANET is the special mobility pattern and rapidly changeable topology. It is not effectively applied the exis...

This paper presents and studies a reliable broadcast protocol for a group of mobile nodes forming an ad-hoc wireless network. The protocol assumes what is seemingly the weakest restriction on node mobility. A node can remain detached from others for an arbitrary amount of time that is bounded by an unknown constant, and connects with an arbitrarily chosen node for a duration with a small and kn...