The Ergodic Rate Density of ALOHA Ad-Hoc Networks
Abstract: Wireless ad-hoc networks (WANETs) offer simplicity and flexibility, which make them suitable for many practical applications. These networks do not depend on infrastructure such as base stations, and are typically coordinated by decentralized multiple access protocols. While some interesting works on the capacity of WANETs have considered specific network structures, more general insights have been obtained from the analysis of random networks. The most popular model for the positions of active users in random WANETs is the homogeneous Poisson Point Process (PPP). In this model, the users' locations are assumed to be uniformly distributed over an infinite plane. However, most analysis of random WANETs have concentrated on an outage model. Beside the fact that the outage model does not accurately describe modern communication systems, it turns out to be also quite complicated for analysis. In the following talk we consider the ergodic rate density (ERD) of a random ALOHA WANET, and present novel upper and lower bounds. The presented bounds are quite general and enable the derivation of closed form expressions of the ERD for various network models. The efficiency and simplicity of the bounds are demonstrated through several applications, and insights are drawn on the behavior of the network performance as function of the path-loss factor, transmission strategies and number of antennas.
* The research presented in the seminar was carried our towards the Ph.D. degree in Electrical Engineering, under the supervision of Prof. Ephi Zehavi and Dr. Itsik Bergel