Capacity Analysis of Wireless Mesh Networks with Omni or Directional Antennas

In this paper we analyze the capacity of wireless mesh networks that use omni or directional antennas. The capacity in our analysis is the end-to-end per-node throughput. Our analysis is based on the assumption that there is only one gateway in the network and all end-users´ traffics go through the gateway. Non-gateway nodes are uniformly distributed in a two- dimensional region centered at the gateway. The main results of our analysis can be summarized as: 1) The capacity is O(1/N) for both omni and directional antennas, where N is number of nodes in the network. 2) the capacity is O(1g m/thetas) for m = 2, and O(1g m/thetas² 1g (1/thetas)) for m > 2, where m is the number of antennas on each node, and thetas is the beamwidth of antennas.