为了确保认知无线网络中次用户对主用户的干扰低于预定值的同时，最大化次用户系统的吞吐量，减少次用户丢失频谱机会的次数，提出单信道模式下次用户感知时间和传输时间被联合优化的算法。在单信道模型中，次用户以混合接入策略与主用户共享一条信道，通过综合考虑对主用户的干扰和次用户频谱机会丢失两个因素，对传输时间和感知时间进行联合优化。经过与固定的感知时间和传输时间算法仿真分析对比，验证了算法的有效性。%In order to ensure that in cognitive radio networks the interference of secondary user on primary user is below a predetermined value while the throughput of the secondary users is maximised and the number of users spectrum lost opportunity is fewer,we present the al-gorithm of joint optimisation of perception time and transmission time of the second user in single-channel mode.In single-channel model,the secondary users share a same channel with primary users by the mixed access policy,through comprehensive consideration of two factors,the interference on the primary users and the spectrum opportunity lost by the secondary users,the transmission time and perception time are opti-mised jointly.The effectiveness of the algorithm is verified by the simulation analysis and comparison on the fixed perception time and trans-mission time algorithm.
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