检索结果-南通市图书馆

CompactPCI总线设备板的电源管理技术

在线全文

学校读者我要写书评

暂无评论

军事通信技术 2001年第3期22卷 72-75页

作者：史宏逵解放军理工大学通信工程学院电信工程系

文中首先简要介绍了电路板高可用性热插拔的概念 ,然后归纳了 Com pact PCI总线电路板电源管理电路所必须实现的功能。最后介绍了一个利用 L TC16 45芯片设计的 Compact PCI总线设备板电源管理电路 ,并结合前述功能要求 ,详细分析了该... 详细信息

文中首先简要介绍了电路板高可用性热插拔的概念 ,然后归纳了 Com pact PCI总线电路板电源管理电路所必须实现的功能。最后介绍了一个利用 L TC16 45芯片设计的 Compact PCI总线设备板电源管理电路 ,并结合前述功能要求 ,详细分析了该电路是如何支持高可用性热插拔特性的。

关键词：热插拔 PCI总线电源管理

Reuse Partitioning-Based Frequency Assignment in Fixed Two-Hop Relay Cellular Network

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Transactions of Tianjin University 2007年第3期13卷 220-225页

作者：刘涛戎蒙恬史宏逵 Department of Electronic Engineering Shanghai Jiaotong University

In relay cellular network, relay links will consume extra frequency resources, which makes radio resource allocation become more complex and important. A new frequency allocation scheme is proposed to increase cell capacity and improve signal-to-interference ratio (SIR) of users located at cell edges. By dividing cell into different parts and configuring each of these parts with a unique reuse factor, this scheme improves spectral utilization efficiency and avoids inter-cell interference effectively. Optimal combinations of reuse factors and locations of relay nodes are also addressed and investigated. Computer simulation results show that, by employing the proposed scheme, maximum cell capacity gains of about 50%, 35% and 30% can be achieved in comparison with conventional cellular network scheme, traditional reuse partitioning scheme and reuse-adjacent-cell-frequencies scheme, respectively. Moreover, since in the proposed scheme resources are dynamically allocated among relay nodes, more benefits can be obtained in comparison with fixed resource allocation schemes under non-uniform traffic distribution.

关键词： reuse partitioning fixed relay node relay cellular network radio resource allocation

Uplink Power Saving Potential of Cellular System with Fixed Relays

在线全文

学校读者我要写书评

暂无评论

Journal of Shanghai Jiaotong university(Science) 2007年第2期12卷 223-228,233页

作者：史宏逵戎蒙恬刘涛喻丹 Dept.of Electronic Eng. Shanghai Jiaotong Univ. Corporate Technology Siemens Ltd.

This paper presented a scheme of relayed cellular mobile telecommunication network,which only employs fixed digital relays and not more than two-hop relay *** saving potential of the network is deeply studied under the assumption of not occupying additional frequency bands(*** share the same frequency bands as used by the base stations).Theoretical analysis and simulation results have both shown that,with the same radio coverage requirement,the necessary effective transmission powers in such a relayed network have greatly decreased compared to conventional cellular network.

关键词： digital relay fixed relay two-hop cellular system power saving

Impact of joint resource partitioning and routing on performance of relay enhanced cellular networks

在线全文

学校读者我要写书评

暂无评论

Journal of Harbin Institute of Technology(New Series) 2008年第4期15卷 465-469页

作者：刘涛戎蒙恬史宏逵 Dept.of Electronic Engineering Shanghai Jiaotong University

Radio resource assignment schemes and routing strategies in relay enhanced cellular networks are proposed in this paper. Under the reuse partitioning-based frequency planning framework, the intra-cell resource partitioning between the base station and relay nodes was addressed firstly by introducing a metric of effective reuse factor. Then, coverage-oriented and capacity-oriented rantings, as well as two link bandwidth assignment schemes＂ equal-bandwidth per link＂ and ＂equal-bandwidth per mobile station＂ were developed. These key issues and their impacts on the system performance were analyzed comprehensively and supported by simulations. Results show that the cell capacity and edge user throughput of the proposed network are superior to the traditional non-relay network when an appropriate effective reuse factor is adopted.

关键词： resource partitioning relay enhanced cellular network routing algorithm

基于IMS的移动通信专网认证和密钥协商方法研究

在线全文

学校读者我要写书评

暂无评论

信息网络安全 2021年第1期21卷 88-96页

作者：董锵罗国明史宏逵张永跃中国人民解放军陆军工程大学通信工程学院南京210042 南京邮电大学南京210023 天津市大数据管理中心天津300221

为适应行业移动通信专网发展和保密通话业务需求,文章针对专网独立业务控制特点,在应用IMS技术架构的移动通信专网中,提出一种向前兼容的专网功能结构模型。文章研究分析了多个可应用于IMS专网的认证和密钥协商方案,并根据归属地服务器... 详细信息

为适应行业移动通信专网发展和保密通话业务需求,文章针对专网独立业务控制特点,在应用IMS技术架构的移动通信专网中,提出一种向前兼容的专网功能结构模型。文章研究分析了多个可应用于IMS专网的认证和密钥协商方案,并根据归属地服务器是否参与认证过程,分端到端、端到服务器两类应用场景,综合比较各类认证和密钥协商方案的安全性能和运算开销,最后给出较优方案,为专网通信安全相关机制建设提供参考。

关键词：会话初始化协议专网安全认证密钥协商

Resource Partitioning and Routing Optimization in Relay Enhanced Cellular Network

在线全文

学校读者我要写书评

暂无评论

Journal of Shanghai Jiaotong university(Science) 2007年第4期12卷 486-491页

作者：刘涛戎蒙恬史宏逵薛义生 Dept.of Electronic Eng. Shanghai Jiaotong Univ. Siemens Ltd.China Corporate TechnologyRadio Communications

A joint routing and resource partitioning scheme were proposed to improve cell capacity and user throughput of cellular network enhanced with two-hop fixed relay nodes (FRNs). Radio resources are partitioned under a reuse partitioning based framework, which guarantees effective and efficient inter-cell interference management. At the same time, each mobile terminal was assigned a channel-dependent route by the routing controller, which tries to maximize the cell capacity under the constraint imposed by reuse partitioning. Intensive computer simulations demonstrate the performance superiority of the FRN enhanced cellular network employing this scheme in comparison with conventional network, as well as the validity of the channel-dependent routing mechanism.

关键词： resource partitioning routing relay enhanced cellular network

在线全文

学校读者我要写书评

暂无评论

基于ARM的局域网IP电话设计

电子设计应用 2003年第6期 22-25页

作者：王前黄勇史宏逵徐子平解放军理工大学通信工程学院

本文从应用角度提出了一种新的局域网IP电话的软硬件设计方案,即以AT75C220开发板作为硬件平台,在mClinux操作系统下采用H.323协议栈开发局域网IP电话终端,并对实现中的关键问题列举了一些高效的处理方法。

关键词： IP电话局域网 ARM 设计 H.323协议栈计算机网络网络电话 Internet

在线全文

学校读者我要写书评

暂无评论

面向WWW业务的移动台状态转移算法研究

军事通信技术 2008年第1期29卷 14-18页

作者：史宏逵罗国明郝红解放军理工大学通信工程学院电信工程系解放军通信指挥学院

文章以下一代移动通信系统中的 WWW 业务为应用场景,提出了一种动态控制移动台状态转移行为的算法。算法的目的是有效地均衡 WWW 会话过程中的控制开销和信令连接占用效率两方面性能。文章采用Pareto 分布建立 WWW 业务模型。算法同时... 详细信息

文章以下一代移动通信系统中的 WWW 业务为应用场景,提出了一种动态控制移动台状态转移行为的算法。算法的目的是有效地均衡 WWW 会话过程中的控制开销和信令连接占用效率两方面性能。文章采用Pareto 分布建立 WWW 业务模型。算法同时考虑了状态转移和移动性管理对总的控制开销的影响。仿真结果表明,该算法对信令连接重建概率和信令连接占用效率两方面性能提供了良好的平衡机制,并使控制开销总量维持在较低水平。

关键词：下一代移动通信系统状态转移移动性管理

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

一种基于消息方向的移动台状态转移方案

信息安全与通信保密 2007年第4期29卷 60-63页

作者：史宏逵戎蒙恬黄磊上海交通大学电子工程系解放军理工大学通信工程学院江苏南京210016

论文基于即时消息业务中上下行消息流之间的相关特性,提出了一种根据先前所处理消息的方向为移动终端状态定时器分配不同阈值的机制,并研究了其对下行包队列长度、下行消息时延和功耗节省等性能的影响。仿真结果表明,与传统单值状态定... 详细信息

论文基于即时消息业务中上下行消息流之间的相关特性,提出了一种根据先前所处理消息的方向为移动终端状态定时器分配不同阈值的机制,并研究了其对下行包队列长度、下行消息时延和功耗节省等性能的影响。仿真结果表明,与传统单值状态定时器方案相比,该机制在保证相似服务质量的基础上显著降低了移动终端的功耗。

关键词：状态转移非连续接收(DRX) 即时消息业务(IMS) 功耗节省