提供QoS保证的WiMAX Mesh网络架构设计

为解决IEEE 802.16-2004标准中Mesh模式缺乏QoS(Quality of Service)保证机制的问题,提出了新的支持QoS保证的WiMAX(Worldwide Interoperability for Microwave Access)Mesh网络架构。该架构使用原标准已有业务分类,定义了动态业务流建立的协议流程。通过拓展分布式管理消息实现了动态业务管理消息在WiMAX Mesh中的传递。改进Mesh模式下数据子帧分配方法,提供了不同业务的数据调度。改进的分布式调度消息可以快速地`完成业务流建立,数据子帧的分配方法则对不同级别业务提供了吞吐量和时延方面的支持。该架构设计可以有效地实现WiMAX Mesh网络服务质量保证。

Architecture of WiMAX Mesh Networks with Quality of Service Guarantee

To resolve the problem that Mesh mode in IEEE 802.16-2004 lacks QoS(Quality of Service) guarantee mechanism,a novel architecture of WiMAX(Worldwide Interoperability for Microwave Access) Mesh network with QoS guarantee is proposed.This architecture uses existing service classes in original standard. Protocol processes that establish dynamic service flow are defined.Using extended distributed scheduling message,the delivery method of dynamic service management messages in WiMAX Mesh networks is implemented.Minislot allocation algorithm is given to support data scheduling of various services.The improved distributed scheduling message can be used to setup the service flow fast.The approach of minislot allocation provides the support to varied services in terms of throughput and delay.The proposed architecture can provide QoS in WiMAX Mesh networks effectively.