Deterministic broadcasting in unknown radio networks
SODA '00 Proceedings of the eleventh annual ACM-SIAM symposium on Discrete algorithms
Minimizing broadcast latency and redundancy in ad hoc networks
Proceedings of the 4th ACM international symposium on Mobile ad hoc networking & computing
Architecture and evaluation of an unplanned 802.11b mesh network
Proceedings of the 11th annual international conference on Mobile computing and networking
Fundamentals of wireless communication
Fundamentals of wireless communication
Measurement driven deployment of a two-tier urban mesh access network
Proceedings of the 4th international conference on Mobile systems, applications and services
Toward Broadcast Reliability in Mobile Ad Hoc Networks with Double Coverage
IEEE Transactions on Mobile Computing
An approximation algorithm for conflict-aware broadcast scheduling in wireless ad hoc networks
Proceedings of the 9th ACM international symposium on Mobile ad hoc networking and computing
Zigzag decoding: combating hidden terminals in wireless networks
Proceedings of the ACM SIGCOMM 2008 conference on Data communication
Taking the sting out of carrier sense: interference cancellation for wireless LANs
Proceedings of the 14th ACM international conference on Mobile computing and networking
Broadcast Scheduling in Interference Environment
IEEE Transactions on Mobile Computing
Distributed transmit beamforming: challenges and recent progress
IEEE Communications Magazine
DAC: distributed asynchronous cooperation for wireless relay networks
INFOCOM'10 Proceedings of the 29th conference on Information communications
IEEE Transactions on Signal Processing
DAC: distributed asynchronous cooperation for wireless relay networks
INFOCOM'10 Proceedings of the 29th conference on Information communications
Capability-Based Defenses Against DoS Attacks in Multi-path MANET Communications
Wireless Personal Communications: An International Journal
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Traditional wireless broadcast protocols rely heavily on the 802.11-based CSMA/CA model, which avoids interference and collision by conservatively scheduling transmissions. While CSMA/CA is amenable to multiple concurrent unicasts, it tends to degrade broadcast performance, especially when there are a large number of nodes and links are lossy. In this paper, we propose a new, drastically different protocol called Chorus that improves the efficiency and scalability of broadcast service with a MAC layer that allows packet collisions. Chorus is built upon the observation that packets carrying the same data can be effectively detected and decoded, even when they overlap in time and have comparable signal strength. It performs collision resolution using symbol-level iterative decoding, and then combines the resolved symbols to reconstruct the packet. This collision-tolerant mechanism significantly improves the transmission diversity and spatial reuse in wireless broadcast, providing an asymptotic broadcast delay that is proportional to the network radius. This advantage is exploited further by Chorus's MAC-layer cognitive sensing and scheduling scheme. We evaluate Chorus with symbol-level simulation, and validate its network-level performance via ns-2, in comparison with a typical CSMA/CA broadcast protocol.