Capacity of Cooperative Ad Hoc Networks with Heterogeneous Traffic Patterns

We study the capacity of ad hoc network with heterogenous traffic patterns, specifically on the fields of multicast and unicast traffic. We apply hierarchical cooperation scheme, MIMO technology and multihop transmission mechanisms in both traffic patterns. The major contribution of this paper is a new capacity analysis method and procedure for the network with heterogenous traffic patterns. We use the index Unicast capacity/Multicast capacity to decide the capacity-dominant traffic pattern, analyze the traffic parameters and derive the network capacity seating in case of both hierarchical layers h_M → ∞ and h_U → ∞. Less-than-half multicast nodes would dominate the whole network capacity. Two indices 1-log_n 2 and log_n (n - 1) of the multicast scale m are very important in deciding the dominant traffic pattern for the network capacity, because when 0 ≤ m ≤ 1-log_n 2 or log_n (n-1) ≤ m <; 1, the aggregate network capacity is irrelated to the multicast destination scale d.