Improved asymptotic multicast throughput for random extended networks

We study the asymptotic throughput for random extended networks, where n   ad hoc nodes are randomly deployed in a square region R(n)=0,n2. We directly consider the multicast throughput to unify the unicast and broadcast throughput, and design a new multicast scheme under the generalized physical model based on the so-called secondary highways system. Taking account of all possible cases of ns = ω(1) and 1 ⩽ nd ⩽ n − 1, we derive the achievable multicast throughput, where ns and nd denote the number of sessions and the number of destinations of each session. We prove that for some cases in terms of ns and nd, our scheme achieves better throughput than the existing schemes.