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A QoS Oriented Vertical Handoff Scheme for WiMAX/WLAN Overlay Networks

机译:WiMAX / WLAN覆盖网络的面向QoS的垂直切换方案

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摘要

Recently, a number of wireless communication technologies are migrating toward heterogeneous overlay networks. The integration of Mobile WiMAX and WLAN seems to be a promising approach due to their homogeneous nature and complementary characteristics. In this paper, we investigate several important issues for the interworking of Mobile WiMAX and WLAN networks. We address a tightly coupled interworking architecture. Further, a seamless and proactive vertical handoff scheme is designed based on the architecture with aims to provide always the best quality of service (QoS) for users. Both the performance of applications and network conditions are considered in the handoff process. Moreover, we derive evaluation algorithms to estimate the conditions of both WiMAX and WLAN networks in terms of available bandwidth and packet delay. A simulation study has demonstrated that the proposed schemes can keep stations always being best connected.
机译:近来,许多无线通信技术正在向异构覆盖网络迁移。由于移动WiMAX和WLAN的同质性和互补性,它们的集成似乎是一种有前途的方法。在本文中,我们研究了有关移动WiMAX和WLAN网络互通的几个重要问题。我们解决紧密耦合的互通架构。此外,基于该架构设计了一种无缝且主动的垂直切换方案,旨在始终为用户提供最佳服务质量(QoS)。在切换过程中会同时考虑应用程序的性能和网络条件。此外,我们根据可用带宽和数据包延迟推导了评估算法,以估计WiMAX和WLAN网络的状况。仿真研究表明,提出的方案可以使站点始终保持最佳连接。

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