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Capacity Evaluation of Cellular TDD-CDMA Systems Deploying Multi-frequency

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Capacity Evaluation of Cellular TDD-CDMA Systems Deploying M...

IEEE 2.07 International Symposium on Microwave,Antenna,Propagation and EMC Technologies for Wireless Communications(ISMAPE-2.07)

作者： chen Shuping~+ Lin Huibin~(++) Wu Xin~+ Zhao Dong~+ Peng Mugen~+ Wang Wenbo~+ (+ beijing {2. of posts & Telecommunications,beijing 100876,P.R china ++ Nokia Networks,Hepingli Dongjie 11,beijing 100013,P.R china)

both uplink and downlink capacity of cellular time duplex division-code division multiple access(TDD-CDMA) systems deploying multi-frequency are analyzed *** impact of multi-user detection,inter-frequency interference and different traffic types on multi-frequency TDD-CDMA system capacity are *** is done to evaluate the theoretical analysis and a good concordance is *** and theoretical results show that adjacent channel leakage ratio should at least 10dB to achieve higher capacity by deploying multi-frequency. When adjacent channel leakage ratio is bigger than 30dB, the capacity of N frequency system is exact N times that of single frequency *** conclusions are true for both uplink and downlink.

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多功能虚拟仪器的设计与实现

数据采集与处理 2009年第B10期24卷 254-260页

作者：张雨超崔岩松陈晶朱丹北京邮电大学电子工程学院北京100876

介绍了多功能虚拟仪器的设计实现,系统采用高速AD和FPGA实现虚拟示波器,高速DA和FPGA实现虚拟信号源,并通过具有U SB功能的单片机CY 78C 68013A实现FPGA与主机之间的数据通信。测试数据表明,该系统实现了虚拟示波器、信号源的功能,该虚... 详细信息

介绍了多功能虚拟仪器的设计实现,系统采用高速AD和FPGA实现虚拟示波器,高速DA和FPGA实现虚拟信号源,并通过具有U SB功能的单片机CY 78C 68013A实现FPGA与主机之间的数据通信。测试数据表明,该系统实现了虚拟示波器、信号源的功能,该虚拟仪器已成功应用于电子技术基础远程实验教学系统中。

关键词：虚拟示波器虚拟信号源 FPGA

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Automatic Compensation of Polarization Mode Dispersion Using Chirped Fiber Bragg Grating

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Automatic Compensation of Polarization Mode Dispersion Using...

2.03 International Conference on Communication Technology

作者： Yu Li Zhou Guang tao Zhang Xiao guang Yang Bo jun Zheng Yuan Liu Yu min Shen yu chen Lin (School of Science beijing {2. of posts and Telecommunications beijing 100876 china)

This paper reports that a novel chirped fiber Bragg grating (FBG), which is made of photosensitive polarization maintaining fiber, is made successfully in china in the first time. An experiment of ada

关键词： Birefringence photosensitive fiber Fiber Bragg grating Polarization mode dispersion compensation.

Study on Classification of Personality-Based Brand Archetype from the Perspective of Internet

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china Communications 2014年第7期11卷 153-160页

作者： chen Fei YUE Xin YANG Xuecheng GE Tingting School of Economics and Management Beijing University of Posts and Telecommunications Beijing 100876 China

Due to the rapid development,Internet has become the main field for brand *** this circumstance,the image of the brand is always consistent with the consumers' ***,this study uses the method of text mining of search engine to explore the categories of brand archetype based on Brand Personality Theory from the perspective of *** results find that 12.brand archetypes,including caregiver,sage,hero,innocent,dominator,creator,vitality,explorer,stylish woman,lover,cooperator,and vogue gentleman,have a high degree *** study uses case study to verify the reasonability and effectiveness of the classification standard.

关键词： brand archetype brandpersonality brand positioning SE text mining

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Navigating the future:Embracing resilience and interoperability in the industrial internet

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Fundamental Research 2024年第1期4卷 1-2页

作者： Chaojie Gu Chunxiao Jiang Jiming chen Yang Cong Bin Xiao College of Control Science and Engineering Zhejiang UniversityHangzhou 310027China beijing National Research Center for Information Science and Technology Tsinghua UniversityBeijing 100084China School of Automation Science and Engineering South China University of TechnologyGuangzhou 510641China Division II Department of Information SciencesNational Natural Science Foundation of ChinaBeijing 100085China Chongqing Key Laboratory of Image Cognition School of Computer Science and TechnologyChongqing University of Posts and TelecommunicationsChongqing 400065China

In the midst of the fourth industrial revolution,the convergence of the digital,physical,and biological realms is propelling industrial innovation to new *** the heart of this transformative era lies the Industrial In... 详细信息

关键词： internet network shaping

SECURE MULTIPATH ROUTING BASED ON SECRET SHARING IN MOBILE AD HOC NETWORKS

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SECURE MULTIPATH ROUTING BASED ON SECRET SHARING IN MOBILE A...

2.09 IEEE International Conference on Network Infrastructure and Digital Content（IC-NIDC 2.09）

作者： Siguang chen Meng Wu College of Computer College of overseas Education Nanjing university of {2. and Telecommunications Nanjing china

It is a challenge to thwart both the passive attacks and active attacks in mobile ad hoc networks for their unique *** improvement of security often sacrifices the delivery rate or other *** propose secure multipath routing scheme based on modified secret sharing as an effective mechanism to protect data confidentiality and simultaneously enhance data delivery rate in mobile ad hoc *** scheme is based on multipath route finding algorithm,modified secret sharing scheme,cryptography and optimization *** results show that our scheme provides a reasonably good level of security and delivery rate.

关键词： multipath routing secret sharing cryptography optimization security MANET

Cavity Scattering Analysis at Internal Resonances

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Cavity Scattering Analysis at Internal Resonances

The 1994 International Conference on Computational Electromagnetics and Its Applications

作者： CAO WEI chen JINSONG(Nanjing university of {2. and Telecommunications Nanjing 2.0003 P. R. china)

＜正＞ Biorthogonal mode method is employed to analyze the cavity scattering problems in this paper. A number of numerical examples are analyzed and compared with the published literatures.

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Graph Attention Residual Network Based Routing and Fault-Tolerant SchedulingMechanism for Data Flow in Power Communication Network

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Computers, Materials and Continua 2024年第1期81卷 1641-1665页

作者： Lin Z. Zeng Z. Yu Y. Ren Y. Qiu X. chen J. State Key Laboratory ofNetworking and Switching Technology Beijing University of Posts and Telecommunications Beijing 100876 China State Grid Jiangsu Electric Power Co. Ltd Nanjing 210008 China

For permanent faults (PF) in the power communication network (PCN), such as link interruptions, the timesensitive networking (TSN) relied on by PCN, typically employs spatial redundancy fault-tolerance methods to keep service stability and reliability, which often limits TSN scheduling performance in fault-free ideal states. So this paper proposes a graph attention residual network-based routing and fault-tolerant scheduling mechanism (GRFS) for data flow in PCN, which specifically includes a communication system architecture for integrated terminals based on a cyclic queuing and forwarding (CQF) model and fault recovery method, which reduces the impact of faults by simplified scheduling configurations of CQF and fault-tolerance of prioritizing the rerouting of faulty time-sensitive (TS) flows; considering that PF leading to changes in network topology is more appropriately solved by doing routing and time slot injection decisions hop-by-hop, and that reasonable network load can reduce the damage caused by PF and reserve resources for the rerouting of faulty TS flows, an optimization model for joint routing and scheduling is constructed with scheduling success rate as the objective, and with traffic latency and network load as constraints; to catch changes in TSN topology and traffic load, a D3QN algorithm based on a multi-head graph attention residual network (MGAR) is designed to solve the problem model, where the MGAR based encoder reconstructs theTSNstatus into feature embedding vectors, and a dueling network decoder performs decoding tasks on the reconstructed feature embedding vectors. Simulation results show that GRFS outperforms heuristic fault-tolerance algorithms and other benchmark schemes by approximately 10%in routing and scheduling success rate in ideal states and 5% in rerouting and rescheduling success rate in fault states. © 2.2. The Authors. Published by Tech Science Press.

关键词： deep reinforcement learning fault tolerance graph attention network Time-sensitive network

移动智能网多媒体消息业务的体系结构及其协议

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通信学报 2004年第9期25卷 78-85页

作者：张磊廖建新陈俊亮北京邮电大学网络与交换国家重点实验室北京100876

多媒体消息业务(MMS, multimedia messaging service)作为一种新的移动数据业务已经得到了大规模的应用,在移动智能网上也可以支持这种业务。ITU-T、ETSI对移动智能网支持MMS并无相应的规范,目前国内计划采用的是SCP(service control po... 详细信息

多媒体消息业务(MMS, multimedia messaging service)作为一种新的移动数据业务已经得到了大规模的应用,在移动智能网上也可以支持这种业务。ITU-T、ETSI对移动智能网支持MMS并无相应的规范,目前国内计划采用的是SCP(service control point)与MMSC(multimedia messaging service center)互联的解决方案。本文在对此方案做详细分析的同时,提出了基于CAMEL(customized application for mobile enhanced logic)的MMS体系结构,并对此进行了深入的探讨。在此基础上,分析计算了智能多媒体消息业务对SCP及信令链路造成的影响。

关键词：移动智能网移动数据业务网络融合 MMS CAMEL GPRS

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