CDMA TECHNOLOGY IN AD HOC NETWORKS

esearch in ad hoc networks faces a multitude of challenges from the physical up to the transport and network layers. Because of the scarce wireless resource and tight capacity limitations [1], a num-ber of cross-layer designs have been proposed recently [2], [3] that deal with optimizing all aspects of data communications in the ad hoc scenario, especially routing and TCP (transmission control protocol) over ad hoc networks. However, fundamentally, networking performance such as delay, throughput, and connectivity are determined by the physical layer; unfortunately, the majority of these designs are based on the IEEE 802.11 protocol, which is known to lead to congestion, connectivity loss and increasing delay as the load builds up