基于异构业务QoS的滤波器组CR跨层资源分配算法

滤波器组多载波(FBMC)技术比正交频分复用(OFDM)带外泄露小,频谱利用率高。提出基于异构业务QoS的FBMC认知无线电(CR)跨层资源分配算法。针对CR网络中的异构场景,在干扰约束和总功率约束条件下构建代价函数进行资源分配,首先对实时用户实施跨层资源分配,将媒体介入控制层的时延约束转化为物理层的传输速率约束,然后对非实时用户按照比例公平原则分配剩余资源。实验结果表明,该算法保证了请求实时业务的用户数据包的平均时延门限不超过最大时延门限,同时实现了非实时用户间资源的比例公平分配。

Cross-Layer Resource Allocation Based on Heterogeneous Service in Filter Bank-based CR Networks

Filter bank multicarrier (FBMC) has small out-of-band leakage and high spectral efficiency in comparison with that of the orthogonal frequency division multiplexing (OFDM).We proposed a cross-layer resource allocation algorithm for heterogeneous service in FBMC-based cognitive radio(CR) networks. Construct cost function to allocate resource under interference constraints and total power budget. We first allocate resource to real-time secondary users with crossing layer, the delay constraint in media access control layer is transformed to transmission data constraint, then allocate the left resource to non-real-time secondary users according to proportional fairness. The simulation results show that the algorithm can ensure the average delay of real-time secondary users below the average delay threshold while realize the proportional fairness resource allocation between non-real-time secondary users.