Joint Flow and Power Control in Multi-hop Cognitive Radio Networks : A Cross-Layer Optimization
Mui Van Nguyen, Choong Seon Hong · 한국정보과학회 학술발표논문집 · 2010
In this paper, we consider the problem of joint congestion and power control over time-varying channels for all secondary user (SU) nodes communicate each other in multi-hop cognitive radio network (CRN). Firstly, we consider how SUs transmit data from infinite transmission buffer to maximize its utility under constraints on tranmission cost without affecting primary user (PU) activity. Then we propose a distributed algorithm for jointly optimal rate and power control (JORPC) via message passing to achieve a joint performance. Finally, the simulation results demonstrate that the proposed algorithm achieves significantly high utility and energy efficiency when comparing to existing works which the optimization-based cross layer design between physical and transport layer has not been thoughtfully taken into consideration in CRNs yet.