How to Improve the Efficiency of IPv6 Handovers in IEEE 802.16 Networks

Tomasz Mrugalski, J. Wozniak
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引用次数: 5

Abstract

The first generation of fully conformant IEEE 802.16-based networks is being deployed throughout the world. Most of these networks do not support full mobility, due to radio access layer limitations. Newer solutions, based on IEEE 802.16-2005 standard, offer mobility support for subscriber stations. Unfortunately, after quickly changing the point of attachment on the WiMAX layer, very slow and inefficient IPv6 reconfiguration takes place. Delays introduced by DHCPv6 stateless automatic configuration and mobile IPv6 can easily diminish or even render useless all benefits gained using the efficient WiMAX - data link layer. IPv6 automatic configuration process was not designed with fast reconfiguration in mind. As handover speed is a crucial requirement in mobile cellular environments, reasons behind delays introduced by IPv6 layer mechanisms have to be analyzed and appropriate countermeasures applied. Proposals include novel use of DHCPv6 relays for remote configuration, solving DAD delays, limiting Binding Update procedure in Mobile IPv6, configuring routing through DHCPv6 communication and some other. This paper describes all stages of full IPv6 handover in IEEE 802.16 environment, focusing on major reasons of reconfiguration delays. A new metric for assessing impact of every stage on handover efficiency is defined. Several proposed improvements to the IPv6 handover process are evaluated and simulation results are presented. A discussion regarding possible generalization of best improvement proposals and further research areas concludes this paper.
如何提高IEEE 802.16网络中IPv6切换的效率
第一代完全符合IEEE 802.16标准的网络正在世界各地部署。由于无线接入层的限制,这些网络中的大多数不支持完全移动性。基于IEEE 802.16-2005标准的较新的解决方案为用户站提供了移动性支持。不幸的是,在快速改变了WiMAX层的连接点之后,发生了非常缓慢和低效的IPv6重新配置。由DHCPv6无状态自动配置和移动IPv6引入的延迟很容易减少甚至使使用高效的WiMAX -数据链路层所获得的所有好处无效。IPv6自动配置过程的设计并没有考虑到快速重新配置。由于切换速度是移动蜂窝环境中的关键要求,因此必须分析IPv6层机制引入延迟的原因并采取适当的对策。建议包括在远程配置中新颖地使用DHCPv6中继,解决DAD延迟,限制移动IPv6中的绑定更新过程,通过DHCPv6通信配置路由等等。本文描述了IEEE 802.16环境下全IPv6切换的各个阶段,重点讨论了重构延迟的主要原因。定义了一个新的指标来评估每个阶段对移交效率的影响。对IPv6切换过程的几种改进方法进行了评估,并给出了仿真结果。最后讨论了最佳改进建议的可能概括和进一步的研究领域。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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