A Hybrid Handoff Strategy Based on Dynamic Spectrum Aggregation in Cognitive Radio System
Spectrum aggregation (SA) is known as a technology permitting a primary user (PU) or a secondary user (SU) to occupy several idle bands simultaneously for transmitting numerous data.In LTE-A scenario, users can apply SA technology for media broadcasting or network video by utilizing scatted spectrum fragments.However, it”s still a problem that how the number ofhandoffand the delay of secondary user can be reduced so as to accomplish the similar performance dynamically once the primary user dominates in cognitive radio system.This paper proposes a handoff strategy based on dynamic spectrum aggregation (DSA) in cognitive radio (CR) system to illustrate the spectrum handoff behavior of secondary user.Also a backup-channel-selection strategy is advised to solve the problem of high delay brought about by the number of handoff.Finally, simulation results present that the handoff strategy based on DSA with the backup channel selection can reduce the number ofhandoffand shorten the delay of handoff.
cognitive radio dynamic spectrum aggregation spectrum handoff
TAN Xue-zhi YIN Cong MA Lin
Harbin Institute of Technology Communication Research Center, Harbin Heilongjiang 150080, China Harbin Institute of Technology Communication Research Center, Harbin Heilongjiang 150080, China; Sci
国内会议
南宁
英文
156-162
2013-10-01（万方平台首次上网日期，不代表论文的发表时间）