A Horizontal QoS Mapping Method Based on Flow Aggregate in Heterogeneous Networks
Wang Zai-jian①② Dong Yu-ning① Sun Gang-you① Zhang Hui①③
①(College of Communications and Information Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210003, China) ②(The College of Physics and Electronic Information,Anhui Normal University, Wuhu 241000, China) ③(National Mobile Communications Research Laboratory, Southeast University, Nanjing 210003, China)
摘要 保证无线异构网络端到端QoS需求，同时兼容现有网络业务和未来需求，是下一代网络的一个研究热点。QoS映射是保证异构网络端到端QoS的有效方法。该文提出一种基于聚集流的QoS映射方法(QoS Mapping Technology based on Flow Aggregate, QMT-FA)，该方法在现有物理网络上建立虚拟的流处理层，在流处理层，原网络中的QoS参数被映射执行器透明封装，映射执行器根据网络情况决定是原样转发还是解聚集。通过建立基于高维的聚集流映射空间，屏蔽了多级网络间映射累积误差影响终端网络QoS指标，保证了异构网络端到端QoS；基于聚集流的QoS映射方法具有较好的可扩展性和伸缩性，能应用于现有的各种异构网络系统和应用业务。最后，通过数值和仿真分析验证了该方法的有效性。
Abstract：To provide end-to-end QoS provisioning in heterogeneous wireless networks and meet the requirements of existing and future network applications, is a challenge in next generation networks. QoS mapping is an effective technology to resolve the problem. In this paper, a QoS Mapping Technology based on Flow Aggregate (QMT-FA) is proposed to assure end-to-end QoS for multimedia services over heterogeneous wireless networks. The proposed method establishes virtual Flow Processing Plan (FPP) above physical network, and allows QoS class mapping in intermediate networks to be transparent over FPP. Then a Mapping Evaluator (ME) entity sitting at a gateway/router determines appropriate QoS mapping to the new network at the network edge. Through mapping services into multidimensional space and designing normal data structure, the method shields the effect of intermediate network QoS mapping, assures the end-to-end QoS of multimedia services in heterogeneous wireless networks, resolves scalability problem, and reduces management complexity and implementational difficulty. Numerical and simulation results are given to demonstrate the effectiveness of the proposed method.
2012, Vol. 34 
