Forward Link Outage Statistics of a Cellular Radio System in Sectored Environment

Abstract

The most of present mobile wireless systems are based on the cellular radio concept. These cellular systems achieve high capacity by allowing the mobile station (MS) to reuse a communication channel in different geographic service area. Channel reuse leads to co-channel interference among users sharing the same channel. Co-channel interference causes outage of the wireless channel and hence limits the capacity of a cellular system. Sectoring is an established technique for reducing the interference level in conventional cellular wireless system. In the paper the outage statistics for forward link of a cellular radio system is presented in sectored environment. Simulation approach is used for the evaluation and outage statistics computation. Large scale fading severely affects the capacity and performance of wireless system. Hence effects such as shadowing and path loss are included in the simulation. Results are presented in form of graphs which show variation in outage probability with different signal to co-channel interference ratio (SIR) thresholds. Different values of path loss exponent and effects of sectoring are considered in simulation. Presented results may be applied in design of higher layer protocols and performance evaluation of wireless and mobile computing systems.