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The purpose of this paper is to present a new method for the study of competition and cooperation relationships among nodes in a network with a CSMA (Carrier Sense Multiple Access) protocol implemented with an exponential backoff process. Self-organized behavior is proposed. The authors propose a "Channel Utilization Model" with a new derived variable "Channel access rate" which applies for all traffic loads. These models are applied with different optimization methods. For multi-hop wireless networks to support various applications, a balance of control overhead and traffic throughput must be obtained. A very simple approach to the MAC layer in such networks is to use a Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) mechanism.
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