机会频谱接入被认为是一种实现异构无线网络间频谱资源共享的有效途径之一。之前的相关研究很少考虑信道质量信息对于机会频谱接入性能的影响。针对这一问题,该文综合考虑主用户信道占用信息和次用户的信道质量信息来设计机会频谱接入策略,并通过求解凸优化问题获得了一种基于信道质量门限的策略。该策略能够最大化次用户获得的有效吞吐率,同时满足主用户对传输质量的要求,且在单信道场景下具有最优性。仿真结果表明:该策略能够显著提高次用户的有效吞吐率。 Opportunistic spectrum access is considered as one of the effective ways to realize spectrum resource sharing among heterogeneous wireless networks. Previous studies rarely considered the impact of channel quality information on opportunistic spectrum access performance. To solve this problem, this paper designs the opportunistic spectrum access strategy considering the channel occupancy information of the primary user and the channel quality information of the secondary user synthetically, and obtains a strategy based on the channel quality threshold by solving the convex optimization problem. This strategy can maximize the effective throughput rate obtained by the secondary users while meeting the requirements of the primary user for the transmission quality and having the optimality in the single-channel scenario. Simulation results show that this strategy can significantly improve the effective throughput of secondary users.