分级跨层设计的宽带无线接入网QoS架构

Broadband Wireless Access Network QoS Architecture of Graded Cross-layer Design

针对当前跨层设计导致信号流向混乱和处理时延长等问题,提出一种新的分级跨层设计的宽带无线接入网QoS架构。该架构具有链路独立层、链路独立-链路依赖的业务接口与链路依赖层,并给出各分级内及接口的QoS管理结构及模块功能。其中,物理层和无线链路层构成的链路依赖层可实现链路对信道的自适应,IP层及其上的各层构成的链路独立层在链路独立-链路依赖接口,通过业务QoS参数与无线资源的映射实现端到端的自适应,信号流向简单且处理时延减小。仿真结果表明,该架构的资源利用率明显优于分层结构。

Aiming at the problem of the confusion of the signal flow direction and the processing delay.Based on the cross-layer design,a graded cross-layer QoS framework with link-independent layer and the interface between the link-independent layer and the link-dependent layer as well as the link-dependent layer is presented.And the QoS management framework and module of the graded layer and the interface between the link-dependent and the independent layer are designed.Where,the link-dependent layer is cross-layer designed by the physics layer and the link layer to adapt to the variance of the channel.The link-independent layer is cross-layer designed by the up IP layers which maps the service’s QoS to the wireless resource in the interface,which makes the flow direction of the signal simpler and the processing delay shorter and realizes the end-to-end adaptation.Simulation results show that the optimal mapping and the graded cross-layer design improve the throughput of the system.