Channel State Estimation Algorithm Based on Data Rate for MAC Protocol in 802.11 Multi Hop Ad Hoc Networks
Medium Access Control (MAC) protocol plays an important role in providing fair and efficient allocation of limited bandwidth in Wireless LANs. In IEEE 802.11 standard protocol, data rate selection is not specified. Rate control is the process of switching data rates dynamically based on channel conditions, with the target of selecting the rate that will provide the maximum throughput feasible for a given channel condition. The two major components of rate control process are channel estimation and rate selection. In this paper, the authors propose to develop an Channel State Estimation Algorithm (CSEA) which is based on the channel state conditions. The authors also follow a two level channel estimation one at the receiver end and another at each intermediate node along the path.