Performance of resource sharing and borrowing in opportunistic access systems

This paper investigates a simple opportunistic resource sharing scheme enhanced with a borrowing concept from a traffic viewpoint. Resources (such as spectrum, channels etc.) are shared between primary and secondary users through a centralized scheme deployed at a base station. The primary users have the preemptive channel access, whereas the secondary ones opportunistically use the available channels. The borrowing concept is introduced to increase the resource availability at the base station level. Evaluations are carried via service retainability, service completions and cumulative effect analysis as relevant secondary users's metrics. The results provide guidelines for designing effective borrowing schemes in terms of quantity of the borrowed resources and the borrowing time duration.