CAJ | 학술논문

在分布式多用户频谱接入(OSA)环境下,从用户间信道选择同步问题成为干扰系统全网吞吐量的重要因素. 为解决该问题,提出一种基于可变随机域宽度的多用户频谱接入方案,在充分利用随机化接入方式避免用户间同步的同时,通过改变可供随机接入选择的信道数(即随机域宽度),达到最优信道选择与同步避免的折中. 仿真结果表明,相对于传统的全频段随机化接入同步避免方式,本方案可有效提升多用户机会频谱接入系统的全网吞吐量.
재분포식다용호빈보접입(OSA)배경하,종용호간신도선택동보문제성위간우계통전망탄토량적중요인소. 위해결해문제,제출일충기우가변수궤역관도적다용호빈보접입방안,재충분이용수궤화접입방식피면용호간동보적동시,통과개변가공수궤접입선택적신도수(즉수궤역관도),체도최우신도선택여동보피면적절중. 방진결과표명,상대우전통적전빈단수궤화접입동보피면방식,본방안가유효제승다용호궤회빈보접입계통적전망탄토량.
In distributed multi-user opportunistic spectrum access (OSA) environment, user-synchronization problem is the vital reason for network throughput deteriorating. To resolve this problem, a changeable-domain based sensing policy is proposed. By adopting randomized sensing policy it can weaken user-synchronization. When changing the number of channels which are available for randomized access (i.e. the width of the random domain), the proposed policy can achieve a tradeoff between optimal myopic sensing and user-synchronization avoidance. Simulations show that the policy can achieve higher network throughput compared to the randomized sensing policy over the whole channels.