无线USB技术探微

随着超带宽(UWB)技术的普及无线技术日趋成熟,成本的日益降低,无线USB(Wireless USB)也浮出水面,WUSB是由杰尔系统、惠普、英特尔、微软、NEC、飞利浦和三星共同开发的,能在3米的距离内实现480 Mbps的等效带宽.通过兼顾安全性、可靠性、降低功耗及其他挑战,和提供移动外设连接,WUSB摆脱了繁多的线缆,增强了用户体验,为USB厂商向WUSB演进提供了正确的途径.     

无线USB(WUSB)的研究

本文首先介绍了无线USB(WUSB)的定义和特性,并探讨了技术上的优势,然后对目前的研究情况进行介绍,最后介绍了无线USB的市场和标准化的情况。     

无线USB技术探微

随着超带宽(UWB)技术的普及无线技术日趋成熟,成本的日益降低,无线USB(WirelessUSB)也浮出水面,WUSB是由杰尔系统、惠普、英特尔、微软、NEC、飞利浦和三星共同开发的,能在3米的距离内实现480Mbps的等效带宽。通过兼顾安全性、可靠性、降低功耗及其他挑战,和提供移动外设连接,WUSB摆脱了繁多的线缆,增强了用户体验,为USB厂商向WUSB演进提供了正确的途径。无线USB综述WUSB的运行利用了MBOA-MAC架构,同时保留了主从架构,和USB2.0一样,它也能处理控制、突发、中断和同步所有这4种传输形式。主机和WUSB设备合称WUSB集群,…     

新一代短距离无线USB传输技术

无线USB(WUSB)技术是高速有效的短距离无线PC移动终端连接接口,这种新技术给各种设备带来了更大的便捷性、移动性和良好的连接性.本文介绍了WUSB接口的优点和技术性能,网络拓扑结构,芯片的工作原理和应用电路的设计方法     

WUSB在无线个域网中的应用

无线通用串行总线(WUSB)技术是近年来近距离无线通信领域的研究热点之一。文章从WUSB的技术特性出发,结合无线个域网(WPAN)的技术特点,分析了WUSB技术在无线个域网中的应用优势。在分析WUSB的技术规程和超宽带(UWB)技术原理的基础上,提出了基于UWB技术的WUSB实现方案,并对其在无线个域网络中的应用前景进行了展望。     

无线USB标准初露端倪

尽管我们不常见到"USB 3.0"的说法,但无线USB(Wireless USB;WUSB)的确是下一代的USB通讯协议.事实上,一般预计传统USB连接端口的使用率在未来几年内会逐步减少,而我们在市面上会看到愈来愈多支持无线USB节点的产品.面对目前市面上超过二十亿个支持USB的产品,到底这项无线USB标准有何过人之处?它会把事情变得更简单吗?会更易于使用吗?本文将为您揭晓.     

深入透视无线USB技术

随着消费电子产品的普及，无线USB（WUSB）已经成为短距离无线数据交互最有潜力的技术。文章从WUSB技术的基本架构出发。剖析了其物理层所使用的UWB技术。归类总结了WUSB技术的优势，并预测了其未来的发展趋向。     

通用串行总线技术的研究

在介绍传统的通用串行总线技术（USB1．1，USB2．0）的基础上，详细论述了USB OTG和无线USB（WUSB）两项新技术的细节，并对三种技术及相关的外设接口技术进行了综合比较。     

控制联网技术传输更小、更价廉的节点

在无线USB（WUSB，wireless USB）系统中，基于USB—IF（USB Implementers’Forum）Certified Wireless USB1．0标准，超宽带（UWB，ultrawideband）Tracer MPI系统帮助设计工程师解决了MAC／PHY（media—access—control／physical）层综合和互用性的问题。论坛涉及的标准关注于WiMedia Alliance的MB—OFDM（multiband orthogonal—fre—quency—division multiplexing）超宽带共享带宽、短程无线通性建议。USB—IF期待正式的WUSB最终能在20m的距离传输数据的速率达到大约1Gbps。     

其它集成电路

0622933基于无线USB技术的信号传输平台[刊,中]/刘晓江//南昌大学学报(工科版)．—2006,28(2)．—151-154 (G)随着无线USB技术的不断发展和成熟,越来越多的工业控制领域的计算机和电子设备将采用此技术。利用赛普拉斯半导体公司新型的片上可编程芯片CY- WUSB6953来完成基于无线USB技术的数据传输平台的构建。阐述了整个系统的工作原理、硬件构成和平台仿真,重点突出了具体实现方案。此平台的构建将使无线USB技术在信号处理与传输系统中得到广泛应用。参7 0622934快速有效的SoC设计平台[刊,中]/陈宏铭//中国集成电路．—2006,15(6)．—76-81(C) 0622935基于USB OTG控制芯片ISP1362的软硬件设计原理[刊,中]/詹莉//中国集成电路．—2006,15(6)．—40- 43(C)     

A Cooperative MAC Protocol for QoS Enhancement in Wireless USB Networks

Wireless USB (WUSB) is the USB technology merged with WiMedia PHY/MAC based on success of wired USB, and it can be applied to various mobile applications such as laptop, cellular phone, etc. Also, WUSB can provide the better user convenience than wired USB applications as well as be applied to the legacy USB application, since it provides high speed connection between host and devices for the compatibility with USB 2.0 specification and removes the cable among devices using the USB protocol. However the current WUSB protocol can’t prevent the QoS degradation occurred by mobile nodes with low data rate. This problem causes the critical problems in QoS provisioning to isochronous streams and mobile applications. Therefore, we propose a new cooperative MAC protocol for WUSB network with virtual MIMO (multi input multi output) link. Based on instantaneous channel state information among WUSB devices, our proposed protocol can intelligently select the transmission path with higher data rate between WUSB host and WUSB device as well as between WUSB device and WUSB device. Thus our proposed protocol can provide advanced QoS with minimum delay for real-time multimedia services.     

Wireless USB Cluster Tree based on Distributed Reservation Protocol for Mobility Support

Wireless USB (WUSB) is the USB technology merged with WiMedia PHY /MAC. WUSB can be applied to wireless personal area network applications as well as PAN applications like wired USB. However, due to mobility of WUSB devices in multi-hop environment, DRP (distributed reservation protocol) reservation conflicts happen frequently among WUSB devices with three-hop distance. To solve this problem in large scale WUSB networks, we propose a new DRP reservation scheme using dual role devices and a new Operation Info bits for three-hop mobility support. It is shown by simulation and numerical results that throughputs of WUSB devices at three-hop range hidden DRP reservation conflicts are largely increased.     

蓝牙技术与协议的开发应用与实现

围绕最新的蓝牙1.1版本规范,概括了蓝牙的产生背景、技术特点和市场潜力、蓝牙开发等方面,最后介绍了有关的产品.     

基于WUSB的RFID系统后台数据管理系统接口的设计

在RFID(射频识别)系统的阅读器和后台数据管理系统之间引进一种新的连接方法———无线连接,可以突破有线连接的限制。基于WUSB(W ireless USB)的无线连接方案传输距离适中、成本低、功耗低、开发简单、系统稳定,是目前较适合RFID系统的解决方案。同时提供详细、完整的实施方案,包含设计方法、数据流程和设计实例,并对有关芯片进行了描述。     

Ultra-wideband slot antenna for wireless USB dongle applications

An ultra-wideband (UWB) printed slot antenna, suitable for integration with the printed circuit board (PCB) of a wireless universal serial-bus (WUSB) dongle is presented. The design comprises a near-rectangular slot fed by a coplanar waveguide printed on a PCB of width 20 mm. The proposed design has a large bandwidth covering the 3.1? 10.6 GHz UWB band, unaffected by the ground length, and omnidirectional radiation patterns. A linear phase response throughout the band further confirms its suitability for high-speed wireless connectivity.     

WiMAX标准最新进展

概述了WiMAX的发展现状.从固定无线接入空中接口、移动无线接入空中接口以及管理平面相关的标准等方面介绍了IEEE 802.16标准的最新进展情况.进一步阐明了WiMAX的工作重点,包括认证规范与网络规范.     

A media synchronization survey: reference model, specification, andcase studies

Researchers have addressed multimedia synchronization from various perspectives. The major issues include how to specify and how to implement synchronization. Especially in the specification area a variety of techniques have been published and implemented. This survey summarizes briefly synchronization requirements, presents a multimedia synchronization reference model, shows details of various specification approaches and applies the reference model to compare existing prominent approaches as case studies     

The ultra wideband WiMedia standard [Standards in a Nutshell]

WiMedia is a radio platform standard that enables shortrange, high-speed wireless connectivity using ultra wideband (UWB) multiband orthogonal frequency division multiplexing (MB-OFDM) technology. It currently enables rates of up to 480 Mb/s in the physical layer and provides an architecture that supports multiple applications via various protocol adaptation layers. As a result, the WiMedia standard has been adopted by the USB Implementers Forum as the Wireless Universal Serial Bus (WUSB) standard and by the Bluetooth Special Interest Group for the next generation Bluetooth 3.0 standard for next generation consumer electronic applications. WiMedia also defines an adaptation layer to use WiMedia for Wireless Internet protocol (IP) known as WiMedia Network and is being considered in other applications such as IEEE 1394 (Wireless Firewire). This article briefly describes the WiMedia standard-the architecture, the technologies deployed in the standard, the applications enabled by it- and compares WiMedia to existing wireless local area network (WLAN) and wireless personal area network (WPAN) standards.     

Spatial hybrid/parallel force control of a hexapod machine tool using structure-integrated force sensors and a commercial numerical control

Structure-integrated force measurement in hexapod structures or kinematics offers great potential for spatial process force control in six degrees of freedom. Although force control has been studied for many years, research questions remain unanswered, especially when regarding parallel kinematic machine tools with numerical control and integrated sensors. This contribution summarizes the technology of structure-integrated force sensing in hexapod machine tools and develops two approaches to use the measured signals for direct hybrid/parallel force control. For different use-cases, such as teach-in or synchronous force/position control with variable task frame, different approaches of set-point specification and injection of manipulated values are studied from a practical point of view. As a result of the work, the feasibility of the force control with structure-integrated sensors on a commercial CNC can be confirmed through appropriate experiments. Furthermore, the realized G-Code integration represents a practical solution for programming force-controlled machine tools in an easy and concise way from the NC programme.