ECWAY TECHNOLOGIES provides IEEE projects and software developments with offices in multiple cities in India. They can be contacted by phone or online. The paper proposes a new broadcast protocol called Chorus that improves efficiency and scalability by allowing packet collisions. Chorus uses interference cancellation to resolve collisions at the symbol level and combine symbols to restore packets. This collision tolerance improves transmission diversity and spatial reuse. Chorus' cognitive sensing and scheduling further realizes these advantages, resulting in broadcast delay proportional to network radius. Evaluations validate Chorus' superior performance over CSMA/CA in scalability, reliability and delay for various network scenarios.

1. ECWAY TECHNOLOGIES
IEEE PROJECTS & SOFTWARE DEVELOPMENTS
OUR OFFICES @ CHENNAI / TRICHY / KARUR / ERODE / MADURAI / SALEM / COIMBATORE
CELL: +91 98949 17187, +91 875487 2111 / 3111 / 4111 / 5111 / 6111
VISIT: www.ecwayprojects.com MAIL TO: ecwaytechnologies@gmail.com
DELAY-OPTIMAL BROADCAST FOR MULTIHOP WIRELESS NETWORKS
USING SELF-INTERFERENCE CANCELLATION
ABSTRACT:
In this paper, we propose a new protocol called Chorus that improves the efficiency and
scalability of broadcast service with a MAC/PHY 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 with each other and have comparable signal strengths. It
resolves collision using symbol-level interference cancellation, and then combines the resolved
symbols to restore the packet. Such a collision-tolerant mechanism significantly improves the
transmission diversity and spatial reuse in wireless broadcast.
Chorus’ MAC-layer cognitive sensing and scheduling scheme further facilitates the realization of
such an advantage, resulting in an asymptotic broadcast delay that is proportional to the network
radius. We evaluate Chorus’ PHY-layer collision resolution mechanism with symbol-level
simulation, and validate its network-level performance via ns-2, in comparison with a typical
CSMA/CA-based broadcast protocol. Our evaluation validates Chorus’s superior performance
with respect to scalability, reliability, delay, etc., under a broad range of network scenarios (e.g.,
single/multiple broadcast sessions, static/mobile topologies).