A MAC protocol for new and handoff calls with finite population

摘要

A MAC protocol for new and handoff calls with a finite population of users, rather than with an infinite user population as in dynamic channel reservation scheme (DCRS), is considered. Similar to DCRS, we divide the wireless channels into shared channels and reserved channels. The handoff calls access any available channel with probability of one, while the new calls access a shared channel with probability of one and access a reserved channel with a request probability. We propose three simpler formulae than that used in the existing DCRS in setting the request probability. In addition, the handoff calls in our proposed protocol are allowed to queue in a finite buffer. To evaluate the system performance, a mathematical model based on queuing theory, rather than a simulation method used in DCRS, is developed. It is a general model that can be adopted for any types of request probabilities including DCRS. Suggestions of how to get the optimum values of the design parameters are also given.