On delay constrained multicast capacity of large-scale mobile ad-hoc networks

This paper studies the delay constrained multicast capacity of large scale mobile ad hoc networks (MANETs). We consider a MANET that consists of n _s multicast sessions. Each multicast session has one source and p destinations. Each source sends identical information to the p destinations in its multicast session, and the information is required to be delivered to all the p destinations within D time-slots. Assuming the wireless mobiles move according to a two-dimensional i.i.d. mobility model, we first prove that the capacity per multicast session is O (min {1, (log p)(log (nsp))√D/n _s.¹ We then propose a joint coding/scheduling algorithm achieving a throughput of Θ (min {1,√D/n_s}). Our simulation results suggest that the same scaling law also holds under random walk and random waypoint models.