IEEE802．16g：2007和IEEE802．16k：2007标准研究

分析了WiMAX标准的分类方法、标准名称、通过时间、发布时间和当前状态,并从参考模型、网络控制与管理系统、网络参考模型、通用分组汇聚子层和媒质无关切换等方面对WiMAX最新标准IEEE 802.1 6g:2007标准进行了研究.最后详细介绍了IEEE 802.16k标准的原理和应用.     

WiMAX最新标准研究

分析了WiMAX标准的分类方法、标准名称、通过时间、发布时间和当前状态,并从参考模型、网络控制与管理系统、网络参考模型、通用分组汇聚子层和媒质无关切换等方面对WiMAX最新标准IEEE802.19g-2007标准进行了研究.最后,对IEEE 802.16k标准的原理和应用进行了详细介绍.     

IEEE 802.16g-2007标准研究

WiMAX得到了业界的广泛支持,其标准化进程不断推进。本文首先分析了WiMAX标准的分类方法、标准名称、通过时间、发布时间和当前状态,并从参考模型、网络控制与管理系统、网络参考模型、通用分组汇聚子层和媒质无关切换等方面对WiMAX最新标准IEEE 802.16g-2007标准进行了研究。     

WiMAX系统架构以及无线资源管理机制

研究了基于IEEE 802.16标准的WiMAX系统架构,给出了端到端的网络参考模型,并就当前WiMAX网络标准现状进行了介绍,特别是详细阐述了WiMAX系统的无线资源管理机制的体系结构,对其中的关键算法进行了详细研究.     

WiMAX标准化进展

WiMAX得到了业界的广泛支持,其标准化进程不断推进.文章首先分析了WiMAX标准的分类方法、标准名称、通过时间、发布时间和当前状态,并从空中接口标准、一致性标准和共存标准三方面对IEEE 802.16系列标准的最新发展进行了研究.     

基于IP的WiMAX移动网络的研究

基于IEEE 802.16的WiMAX网络的应用正成为业界的讨论热点,IEEE 802.16m更被选为下一代无线通信标准（IMT-advanced）的候选方案之一。在此深入探讨构建基于IP技术的WiMAX应用网络架构。首先分析IEEE 802.16e规范为支持移动性在物理层和媒质接入层引入的增强技术。随后基于移动IP技术和WiMAX网络参考模型给出基于IP的移动WiMAX网络的可行的应用模型。该应用方案可为基于IEEE 802.16技术的应用提供一个参考。     

IEEE 802．16的关键技术

介绍了IEEE 802.16(WiMAX)系列标准的发展并对其MAC层和物理层结构及关键技术进行了详细的阐述.概述了无线城域网中应用的其他先进技术,WiMAX的发展趋势.     

WiMAX(802.1 6e)与WCDMA系统邻频共存干扰分析

WRC-07将WiMAX(IEEE 802.16e)批准为新的3G标准以来,WiMAX与WCDMA系统在2500-2690MHz频段的干扰共存问题受到了业界的广泛关注。本文根据WiMAX(802.16e)和WCDMA的标准规范,通过Monte-Carlo仿真方法,对WiMAX与WCDMA系统共存时典型的干扰场景进行了研究,分析了干扰场景中影响WiMAX系统性能和WCDMA系统容量的因素,同时提出了减小系统间干扰的有效措施。     

WiMAX技术讲座第1讲 WiMAX技术概述

通过不同设备供应商提供的、具有互操作功能的兼容设备,WiMAX可用于提供建设成本低、兼容程度高、互操作性强的BWA解决方案。本文介绍了WiMAX的产生背景,分析了WiMAX的技术优势,给出了WiMAX的参考模型,归纳了国内外应用现状,阐明了WiMAX发展面临的挑战,预测了WiMAX技术的发展趋势。     

WiMAX技术讲座 第4讲 WiMAX网络架构简介

本文分析了WiMAX网络的体系结构,介绍了WiMAX网络的参考模型,最后对WiMAX网络的主要功能进行了描述。     

Capacity estimation and TCP performance enhancement over mobile WiMAX networks - [WiMAX update]

The mobile WiMAX system is based on IEEE 802.16e, which defines radio interface supporting several classes of Internet Protocol applications and services. While the mobile WiMAX system is being deployed, IEEE 802.16m TG is developing an amendment to the IEEE 802.16e to greatly improve the system performance, and it is focusing not only on the PHY and MAC performance but also on a level of end-to-end performance improvement that includes the scope of the network and application to embrace the strong market request and interest. To evaluate the mobile WiMAX system capacity and performance, all the aspects of performance evaluation ? from air link to application ? are required. For the network and application-level capacity and performance analysis, we first provide an overview of mobile WiMAX systems, especially of the OFDMA/TDD systems of IEEE 802.16e and then describe subscriber and application profiles that include traffic-mix ratio, data-session attempts for applications, diurnal-application traffic distribution, and the application-traffic model. Afterward, the simulation results of network- traffic characteristics and demand estimation are provided. Finally, in the last section, we provide simulation results of end-to-end application performance evaluation using the examples of VoIP and a TCP/IP performance-enhancement method that can be implemented in the mobile WiMAX MAC or MAC/IP cross layer.     

WiMAX宽带无线接入在SDH宽带光城域网的应用模型

WiMAX是一种应用于城域网并提供宽带无线接入的技术。针对我国宽带IP城域网建设的实际情况,结合WiMAX技术优势和应用特点,建立了采用WiMAX接入技术的城域网的网络结构,提出了网络配置方案和各种WiMAX设备的接口要求,并对该应用模型所对应的协议栈进行了分析和设计。对今后WiMAX技术在SDH宽带IP城域网的应用具有实际意义。     

Measurement and analysis of online gaming services on mobile WiMAX networks

Online games have been played mainly in desktop computers over wired networks because of high speed and intensive computation requirements. The advances in mobile devices and ever increasing wireless link bandwidth motivate us to study whether players can enjoy online gaming over broadband wireless networks such as mobile Worldwide Inter‐operability for Microwave Access (WiMAX). In this paper, we carry out comprehensive measurements of the World of Warcraft (WoW) over the mobile WiMAX in Seoul, Korea, and analyze the network performance focusing on two aspects: (1) network layer dynamics such as round trip time, jitter, and packet loss and (2) WiMAX link layer statistics such as the radio signal strength, handovers, and piggyback mechanism. From the empirical data, we set up performance models and evaluate the performance of WoW over WiMAX. We also discuss how to improve the service quality of online gaming over WiMAX.Copyright © 2013 John Wiley & Sons, Ltd.     

WIRELESS BROADBAND ACCESS: WIMAX AND BEYOND - A Secure and Service-Oriented Network Control Framework for WiMAX Networks

WiMAX, worldwide interoperability for microwave access, is an emerging wireless communication system that can provide broadband access with large-scale coverage. As a cost-effective solution, multihop communication is becoming more and more important to WiMAX systems. To successfully deploy multihop WiMAX networks, security is one of the major challenges that must be addressed. Another crucial issue is how to support different services and applications in WiMAX networks. Since WiMAX is a relatively new standard, very little work has been presented in the literature. In this article we propose a secure and service-oriented network control framework for WiMAX networks. In the design of this framework we consider both the security requirements of the communications and the requirements of potential WiMAX applications that have not been fully addressed previously in the network layer design. The proposed framework consists of two basic components: a service-aware control framework and a unified routing scheme. Besides the design of the framework, we further study a number of key enabling technologies that are important to a practical WiMAX network. Our study can provide a guideline for the design of a more secure and practical WiMAX network     

EPON和WiMax融合架构下带宽分配算法的研究

EPON和WiAMX的融合架构提供了一种低成本、高带宽和高覆盖的接入网的解决方案.EPON和WiMAX有着不同的服务质量(QoS)体系模型,对于融合架构来说,如何建立统一的带宽分配策略,实现区分多业务和保证QoS是需要面对的一个问题.文章设计了一个融合网络下的带宽分配框架,详细分析了带宽申请和分配的过程,并给出了具体的算法设计.     

Performance Analysis of WiMAX Networks AC

In WiMAX networks, contention based bandwidth requests are allowed in the uplink channel on the time division duplexing frame. The standard allows some types of traffic classes to use this period while preventing others like Unsolicited Grant Service. In this study, we provide a performance analysis of the three types of connections (ertPS, non-real time Polling Service and Best Effort) that are allowed to contend for bandwidth request opportunities. The choice of these traffic classes covers both real and non-real traffic types. Two quality of service parameters; contention probability and average connection delay are investigated in order to evaluate the network performances. Different levels of priority and blocking probability are assigned to each class of service. This performance analysis has been done using an analytical model for evaluating admission control for the previous mentioned classes in WiMAX network.     

一种多出口的WiMAX Mesh回程网络资源调度算法

由于WiMAX Mesh网络可以有效保证网络的QoS,因此有可能将其应用于电信级的回程网络.本文分析了WiMAX Mesh网络的调度机制和单出口 WiMAX Mesh网络存在的问题,提出了一种多出口WiMAX Mesh网络组网方案,在该方案的基础上提出了全局最优的调度算法,并给出了把该算法应用到实际WiMAX Mesh网络中的详细步骤.本文对具有20个和50个SS节点的Mesh网络进行了仿真,对算法的性能和效果进行了验证.仿真结果表明,本算法可以把调度效率提高53%～70%.     

WiMAX networks: from access to service platform

Recently, WiMAX has been proposed as an attractive wireless communication technology for providing broadband access for metropolitan areas. Despite its salient features from the technical perspective, the success of the WiMAX network depends on its capability of providing cost-effective solutions for a variety of existing and potential services. To address this issue, we advocate the design of a new network layer that can support multihop communications efficiently in WiMAX networks and that can fully exploit the features of the WiMAX standards. In particular, we first identify services that are important for broadband wireless network providers and investigate the requirements for different services. We then discuss now to design WiMAX networks by considering issues of efficiency, security, and reliability. The key observation is that WiMAX can be properly complemented by advanced connection management and network coding techniques.