Broadcast reception rates and effects of priority access in 802.11-based vehicular ad-hoc networks
Proceedings of the 1st ACM international workshop on Vehicular ad hoc networks
Asymptotic analysis of multistage cooperative broadcast in wireless networks
IEEE/ACM Transactions on Networking (TON) - Special issue on networking and information theory
Increasing broadcast reliability in vehicular ad hoc networks
Proceedings of the 3rd international workshop on Vehicular ad hoc networks
A Cross-Layer Framework for Exploiting Virtual MISO Links in Mobile Ad Hoc Networks
IEEE Transactions on Mobile Computing
Overhaul of ieee 802.11 modeling and simulation in ns-2
Proceedings of the 10th ACM Symposium on Modeling, analysis, and simulation of wireless and mobile systems
Proceedings of the 14th ACM international conference on Mobile computing and networking
Cooperative protocols design for wireless ad-hoc networks with multi-hop routing
Proceedings of the 5th International ICST Conference on Heterogeneous Networking for Quality, Reliability, Security and Robustness
Message broadcast using optical orthogonal codes in vehicular communication systems
The First International Workshop on Wireless Networking for Intelligent Transportation Systems
Distributed cooperative MAC for multihop wireless networks
IEEE Communications Magazine
An improved coded repetition scheme for safety messaging in VANETs
WiCOM'09 Proceedings of the 5th International Conference on Wireless communications, networking and mobile computing
A Cooperative Diversity-Based Robust MAC Protocol in Wireless Ad Hoc Networks
IEEE Transactions on Parallel and Distributed Systems
An opportunistic relay protocol for vehicular road-side access with fading channels
ICNP '10 Proceedings of the The 18th IEEE International Conference on Network Protocols
IEEE Transactions on Signal Processing
Energy-efficient broadcasting with cooperative transmissions in wireless sensor networks
IEEE Transactions on Wireless Communications
Cooperative communication in wireless networks
IEEE Communications Magazine
A simple Cooperative diversity method based on network path selection
IEEE Journal on Selected Areas in Communications
On broadcasting with cooperative diversity in multi-hop wireless networks
IEEE Journal on Selected Areas in Communications
On the power efficiency of cooperative broadcast in dense wireless networks
IEEE Journal on Selected Areas in Communications
Research challenges towards the Future Internet
Computer Communications
VANET QoS-OLSR: QoS-based clustering protocol for Vehicular Ad hoc Networks
Computer Communications
A cooperative watchdog model based on Dempster-Shafer for detecting misbehaving vehicles
Computer Communications
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In vehicular ad hoc networks, most of critical applications involved with safety rely on reliable broadcast communications with low latency. Recently, repetition-based protocols have been proposed to meet the requirements of timeliness and reliability for broadcasting. In these protocols, a sender repeatedly retransmits the broadcast message during the lifetime of the message. However, existing protocols face serious problems such as deterioration of the signal quality caused by wireless fading. In particular, since excessive repetitions might cause network congestion and waste channel resources, reliability of broadcasting should be achieved with as small a number of repetitions as possible. In this paper, we therefore propose a novel repetition-based broadcast protocol which exploits a cooperative diversity technique (called RB-CD) making a small number of repetitions robust for wireless fading. To support this cooperative diversity, neighboring nodes transmit the same message almost simultaneously (that is, using the same repetition pattern for each other) in order to form a virtual antenna array. The virtual antenna array achieves a diversity gain at the receivers. In the RB-CD protocol, the virtual antenna array consists of the source and some of its neighbors (called relays) which participate in repeating the transmission of a broadcast message. In addition, a new distributed relay selection algorithm is introduced in the RB-CD protocol. From the ns-2 simulation results, we verified that RB-CD provides a more reliable broadcasting service due to its capability of exploiting cooperative diversity.