Pacifier: High-Throughput, Reliable Multicast Without "Crying Babies" in Wireless Mesh Networks

Date Added: May 2009
Format: PDF

In contrast to unicast routing, high-throughput reliable multicast routing in Wireless Mesh Networks (WMNs) has received little attention. There are two primary challenges to supporting high-throughput, reliable multicast in WMNs. The first is no different from unicast: Wireless links are inherently lossy due to varying channel conditions and interference. The second, known as the "Crying baby" problem, is unique to multicast: the multicast source may have varying throughput to different multicast receivers, and hence trying to satisfy the reliability requirement for poorly connected receivers can potentially result in performance degradation for the rest of the receivers.