Performance Analysis and Improvement of TFRC in Cognitive Radio Environment
Tang Hui · Microcomputer applications · 2011
TCP Friendly Rate Control(TFRC) is one of the transport protocols which can deliver the multi-media efficiently.However,TFRC obtains little attention in cognitive radio environment.In this paper,TFRC is simulated with cognitive radio channels,by considering the impact of three factors: i) spectrum sensing interval,ii) primary users' activity,and iii) channel heterogeneity,and then a feedback way is proposed to improve the performance of TFRC for heterogeneous channel after spectrum handoff.The simulation results show that the sensing interval and primary user interference have a great effect on the performance of TFRC,and also show that the proposed feedback way can enhance the efficiency of TFRC.