Date Added: Jan 2011
Traditional omni-directional antennas result in increased mutliuser interference and are known to limit the performance of Medium Access Control (MAC) protocols for ad-hoc networks. Topology control is the capability of a node to control the set of neighbor nodes and in this paper, the impact of using smart antennas and/or power control for topology control is investigated. The performance of TDMA MAC schemes with common frame for which the assignment of time slots to a node is not aware of the time slots assigned to the neighbor nodes (topology-unaware schemes like the Deterministic Policy and the Probabilistic Policy), is studied as well. A comparison based on analytical models reveals the advantages of topology control, as well as its dependence on the mobility of the nodes and its resolution.