Distributed Joint Power Control Based on IEEE802.11 Protocol

Now the existent schemes to optimize the performance in wireless LAN is mainly based on centralized algorithms, which aim at family user. This paper proposes a distributed power control algorithm for large scale use. The scheme works based on prediction and sub-traverse, cooperating with a small granularity schedule which is called t-scale timeslot schedule. The simulation on NS2 shows that the scheme reduces the interference among access points and boosts the throughput of the whole network by 3.1 Mb/s(unsaturated) or 1.0 Mb/s(saturated), while the variety of the network can be responded timely.