提出一种能够有效保证服务质量(QoS)的点到多点(PMP)全球微波接入互操作(WiMAX)网络跨层架构,将整个WiMAX协议体系结构模型纵向划分为数据服务流递交子平面和QOS资源管理子平面.前者遵循IEEE802.16标准,对服务流进行数据处理并实现逐层递交,后者通过多种信令协调各协议层QoS管理模块运作,实施自适应的QoS联合控制.仿真结果表明,与典型的PMPWiMAX控制方案相比,基于跨层架构的QoS联合控制方案能够有效保证各类多媒体通信服务流的QoS性能,并兼顾系统用户的公平性.
This paper proposes one novel cross-layer architecture for quality of service (QoS) of guarantee in point-to-multipoint (PMP) Worldwide Interoperability for Microwave Access (WiMAX) networks, which divides the whole protocol structure model into two sub-planes vertically: one is data service flow delivery sub-plane which could provide data processing and delivering layer-by-layer for service flow based on IEEE 802.16 standards, and the other is the QoS resource management sub-plane which could coordinate the operation of all manage modules in different protocol layers and implement adaptive QoS joint control by various signaling. Simulation results show that the QoS joint control solution based on the cross-layer architecture can provide guarantee of QoS for multimedia communication service flow effectively and obtain users' fairness when comparing to the typical control solution used in PMP WiMAX.