VLC-WiFi异构网络QoS感知的跨层动态资源分配

VLC-WiFi异构网络已经成为广受欢迎的短距离无线通信方式之一。然而，有限的频谱资源导致VLC-WiFi异构网络容量难以满足井喷式增长的用户数据带宽需求。该文结合物理层的动态链路传输性能以及媒体访问控制层的队列缓冲延迟性能，定义链路传输性能和链路服务质量(QoS)感知等级评估公式，根据用户数据包QoS需求，设计QoS感知的跨层动态资源分配(QoS-CLDRA)方法，并引入非正交多址接入的用户匹配与功率分配策略，进一步提升系统的吞吐量。仿真结果表明:所提方法能够有效提升系统吞吐量和降低缓冲队列长度。

QoS-aware Cross-layer Dynamic Resource Allocation for Indoor Visible Light Communication-WiFi Heterogeneous Networks

VLC-WiFi (Visible Light Communication-Wireless Fidelity) heterogeneous networks are becoming a popular short-distance wireless communication solution. However, limited spectrum resources make it difficult for VLC-WiFi heterogeneous network to meet the rapidly growth for data bandwidth of user. Combined with the link transmission performance of the physical layer and the queue buffer delay performance of the media access control layer, an evaluation formula of dynamic link transmission performance and link Quality of Service (QoS) perception level are defined. According to the QoS requirements of data packets, the QoS-aware Cross-Layer Dynamic Resource Allocation (QoS-CLDRA) is proposed. Furthermore, the user matching and power allocation strategy based on non-orthogonal multiple access are designed to improve the system throughput. Simulation results show that the proposed QoS-CLDRA can effectively improve the system throughput and reduce the buffer queue length.