wman

All these studies are useful for building and running WMAN .

这些研究对于无线城域网的组网和运营具有重要的指导意义。

Shaping WMAN on the Basis of IEEE 802.20

基于IEEE802.20标准构建无线城域网

Research on Authentication Mechanism in Integrated WMAN and 3G Network

WMAN与3G融合网络认证机制研究

Packet Scheduling Algorithm for Real-Time Services in Broadband WMAN

一种适用于宽带无线城域网实时业务的分组调度算法

IEEE 802.16e wireless MAN ( WMAN ) is a standard for a broadband access technology .

IEEE802.16e是无线城域网（WMAN）的一个标准，为宽带接入技术的一种。

As next-generation wireless network technology with great competition , WMAN has focused on many kinds of services with QoS supported .

无线宽带城域网作为有竞争力的下一代无线网络技术，已经把对多种业务提供QoS支持的问题提上了日程。

As an important part of future communication technologies , the Wireless Metropolitan Area Network ( WMAN ) access technology has gained an increasing interest .

作为未来通信技术的重要组成部分，无线城域网（WMAN）接入技术受到了业界越来越多的关注。

Double - binary Turbo code is one of the FEC methods for multi - carrier OFDM physical layer of 802.16 standard which supports the WMAN .

双二元Turbo码（double-binaryTurbocode）是支持无线城域网（WMAN）的802.16d标准中多载波OFDM系统物理层采用的前向纠错码方案之一。

In the future OFDM technology , which is one of the most competitive technologies , will be applied to the Beyond 3C / 4C wireless cellular communication system and WMAN , etc.

在未来的B3G／4G无线蜂窝通信系统和无线城域网等方面，OFDM技术是最具有优势的技术之一。

Wireless Metropolitan Area Network ( WMAN ) is faced with some security risks . Privacy sub-layer is defined in IEEE 802.16 to achieve identity authentication , key management and data protection .

无线城域网（WMAN）面临着各种安全威胁，其规范IEEE802.16中定义了保密子层实现认证、密钥协商与数据保密。

WiMAX , based on the standard of wireless metropolitan area network ( WMAN ), have broad application prospects and can provide high-speed data , voice and video services both in fixed and mobile environments .

当前，支持宽带无线接入的WiMAX技术受到业界普遍关注，它基于无线城域网（WMAN）标准，可以在固定或移动的环境下提供高速的数据、语音和视频等业务，具有广阔的应用前景。

As a broadband wireless access scheme for WMAN ( Wireless Metropolitan Area Networks ), WiMAX ( World Interoperability for Microwave Access ) has received primary concern because of its outstanding system performance and wide market outlook .

WiMAX作为一种面向无线城域网（WMAN）的宽带接入方案，以其优异的性能和广阔的市场前景而倍受关注。

As an up and coming network , Wireless Metropolitan Area Networks ( WMAN ) which is possessed with outstanding advantages such as long distance transmission , high speed and efficiency , has become the hot topic in wireless communications in recent years .

作为一种新兴的无线宽带网络，无线城域网具有高速度，远距离，高效率的优点，近年来成为了无线通信研究的热点。

To support QoS , the request / grant mechanism has been used in WMAN . Under this mechanism , when a subscriber station wants to send data , it needs to send a bandwidth ( BW ) request to base station firstly .

为了提供QoS支持，无线城域网采用了请求/授予模式来发送数据，即用户站想要发送数据时，首先必须向基站发送带宽请求。

WiMax is a technology based on IEEE 802.16 or BWA ( Broadband Wireless Access , Broadband Wireless Access ) standard for Wireless Metropolitan Area Network ( WMAN ), it has faster transmission speed , longer transmission distance , QoS guarantee and better security .

WiMax是一项基于IEEE802.16或BWA（BroadbandWirelessAccess，宽带无线接入）标准的无线城域网（WMAN）技术，具有传输速率快、传输距离远、安全性能好、有QoS保障等优点。

IEEE 802.11 and 802.16 standards are respectively used to build broadband WLAN and WMAN . These two kinds of standards are respectively introduced and analyzed . The mainly technical characteristics and parameters are compared detailedly , besides their relations and applications are expatiate in the end .

介绍和分析了用于构建宽带WLAN的IEEE802.11系列标准与构建宽带WMAN的IEEE802.16系列标准，对二者所涉及的技术特点和主要参数分别作了详细的比较，并阐述了它们的关系及其应用。

Anyway , in the WMAN communications system , the effects of multipath fading channel may cause to weaken the system performance , and lead into the co-existence of random errors and burst errors , but the end user applications often require low packet error rate and high throughput .

但在无线城域网通信系统中，多径、阴影、多普勒频移等会严重恶化系统性能，使随机错误和突发错误并存。用户通常需要系统能够提供较低的数据包错误概率和较高的系统吞吐量。