Abstract-Dynamic Spectrum Access (DSA) has the potential to vastly improve spectrum utilizations among heterogeneous networks. We present a continuous-time Markov chain (CT-MC) model to analyze the performance of three co-located cognitive systems with various priority classes and bandwidth requirements. The maximum spectrum utilization and minimum blocking probability are derived in a one-channel band scenario. A channel packing scheme (CPS) is then proposed in a multiplechannel band scenario. This scheme packs users of smaller bandwidth requirements in clusters, in order to alleviate the unnecessary blockage to users of larger bandwidth requirements. Numerical results show that the system can benefit from CPS in terms of blocking probability, spectrum utilization and overall failure probability.
The minimum blocking probabilities and maximum spectrum utilizations of three co-located systems with different bandwidth requirements were derived for one-channel band scenario in REF .
Analysis of Dynamic Spectrum Access with Heterogeneous Networks: Benefits of Channel Packing Scheme
GLOBECOM 2009 - 2009 IEEE Global Telecommunications Conference
GLOBECOM 2009 - 2009 IEEE Global Telecommunications Conference
Computer Science