CAJ | 학술논문

针对认知无线电系统中，频谱切换效率低这个难点，采用分组匹配的思想，基于业务类型对用户进行分组，将用户分组与一种全面可靠的信道评估机制匹配。这种先分组后分配信道的切换算法能有效提高多个用户的复杂场景中频谱切换的效率。仿真结果表明，该算法能够减少认知用户拥塞概率、频谱切换次数以及切换延迟，提高频谱切换效率，有效保证系统服务质量。
침대인지무선전계통중，빈보절환효솔저저개난점，채용분조필배적사상，기우업무류형대용호진행분조，장용호분조여일충전면가고적신도평고궤제필배。저충선분조후분배신도적절환산법능유효제고다개용호적복잡장경중빈보절환적효솔。방진결과표명，해산법능구감소인지용호옹새개솔、빈보절환차수이급절환연지，제고빈보절환효솔，유효보증계통복무질량。
In cognitive radio system, the efficiency of spectrum handoff is always a challenge. To conquer this difficulty, classification and matching scheme is adopted. The users are classified according to their type of services at first, and then a reliable channel evaluation is designed to match the classifications of the users. This spectrum handoff scheme based on classification and matching is efficient when the users’number is large. Simulation results show that the proposed algo-rithm is a viable method of prompting spectrum handoff efficiency, and reducing congestion probability, handoff number and handoff delay.