CAJ | 학술논문

基于频谱预测对认知用户进行能量有效性设计，重新设计认知用户的帧结构，在频谱感知前加入频谱预测时隙，在预测为空闲的信道中选择信道进行频谱感知，避免浪费频谱感知能量，与传统认知用户相比，提高了能量有效性。推导表明，认知用户能量效率由频谱预测能量、频谱预测时长、认知无线网络通信强度、信道数量决定。仿真结果表明，为了提高认知用户的能量效率，频谱预测参数必须满足预测能量低于32 mW、预测时长小于15 ms 的条件。认知无线网络的通信强度的提高和信道数量的增加能够提高认知用户的能量效率。
기우빈보예측대인지용호진행능량유효성설계，중신설계인지용호적정결구，재빈보감지전가입빈보예측시극，재예측위공한적신도중선택신도진행빈보감지，피면낭비빈보감지능량，여전통인지용호상비，제고료능량유효성。추도표명，인지용호능량효솔유빈보예측능량、빈보예측시장、인지무선망락통신강도、신도수량결정。방진결과표명，위료제고인지용호적능량효솔，빈보예측삼수필수만족예측능량저우32 mW、예측시장소우15 ms 적조건。인지무선망락적통신강도적제고화신도수량적증가능구제고인지용호적능량효솔。
An energy efficient secondary user was designed based on the spectrum prediction.The frame structure of the secondary user was redesigned,and the prediction slot was added before the sensing slot to select channel for sensing only from the channels predicted to be idle.Consequently,the sensing energy is saved and the energy efficiency is improved compared to the traditional secondary user.It is further found that the energy efficiency is determined by prediction energy,prediction duration,traffic intensity and the number of channels in cognitive radio networks(CRN).Simulation results show that to improve energy ef-ficiency,prediction energy should be controlled less than 32 mW and prediction duration should be cut shorter than 15ms.Furthermore,increasing traffic intensity and channel amount of the cognitive radio net-works improves the energy efficiency of secondary user.