为最大化频谱利用率,根据主用户使用信道的频率和次级用户的数据传输需求推导得到最优次级用户数据传输时间.在毫秒级频谱空洞场景下,基于部分可观测马尔可夫决策过程提出一种自适应频谱感知时间分配机制.该机制根据前一时段的信念状态和能量感知结果判断在当前时段内的最优行为.仿真结果表明,该机制能够根据不同主用户和次级用户的冲突概率需求最大化频谱利用率. In order to maximize the spectrum utilization rate, the optimal secondary user data transmission time is deduced according to the frequency of the primary user’s channel and the data transmission requirement of the secondary user.In the case of millisecond-level spectral holes, based on partially observable Markov decision process This paper proposes a time-sharing mechanism of adaptive spectrum sensing, which determines the optimal behavior in the current period according to the state of belief and energy perception of the previous period.The simulation results show that the mechanism can be based on different primary and secondary users Conflict Probability Demand Maximize Spectrum Utilization.