Competition, Cooperation, and Optimization in Multi-Hop CSMA Networks with Correlated Traffic
Zhefu Shi, Cory C. Beard, Kenneth Mitchell · INTERNATIONAL JOURNAL OF NEXT-GENERATION COMPUTING · 2012
The purpose of this paper is to present a new method for the study of the competition and co- operation relationships among nodes in a network us- ing a CSMA (Carrier Sense Multiple Access) proto- col implemented with an exponential backoff process. Self-organized behavior is proposed. Standard topolo- gies, such as tandem, traffic splitting and merging, are studied with variables: 1) backoff rate, 2) topology po- sition, 3) traffic splitting. Several interesting phenom- ena are reported. We propose a “Channel Utilization Model” with a new derived variable “channel access rate” which can be used for all traffic loads. These mod- els are applied with different optimization methods. Special strategies, for example “MAC Friendliness”, are also presented for serving special traffic like emergency traffic.