Single-rate multicasting may yield low utilization of the network resources when a subset of
the receivers creates a bottleneck for the whole multicast group. Thus, practical multirate
multicasting strategies are required to allow users with better channels to achieve maximum
performance. While earlier studies have investigated such mechanisms using routing
strategies over fixed trees, in this work we consider the possibility of using network coding
without a given subgraph. Our scheme identifies the optimal routes and provides the utility …

Multicasting is the delivery of common information to multiple receivers. It finds its
application in multi-media broadcasts, group communication in social networks etc. The
multicast traffic in networks can constitute a significant portion of the total traffic (eg 80% in
military communications) and hence it is imperative that they are served efficiently. So far
“single rate” multicasting, where all receivers receive the data at a common rate from the
source has attracted most of the attention. Yet, single-rate multicasting may yield low …