TSS: A Primary User Mobility Model in Cognitive Internet

Realistic mobility models are important to understand the performance of routing protocols in Cognitive Internet (CI), especially when behaviors and activities of Primary User (PU) are taken into consideration. Currently, PU mobility models are commonly simplistic spectrum handoff or traditional mobility models that do not reflect realistic space-time characteristics in CI. Hence, the effect involved in PUs mobility should tightly integrated with spectrum available time and PUs appearance behavior. In this paper we propose a novel PU mobility model named TSS, combined with spectrum usage and spatio-temporal characteristics. In this model, we describe the PUs appearance behaviors that are visited often by the nodes to capture location visiting preferences, and spectrum available time with different mobility parameters to create periodical spectrum reuse of nodes at the same location. Lastly, we present numerical and simulation results that illustrate the performance evaluation of PU.