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2010 3rd International Conference on Advanced Computer Theory and Engineering, ICACTE 2010

作者： Wang, Haoxiang Chen, Yunfei Communication and Computer Network Laboratory of Guangdong Province School of Computer Science and Engineering South China University of Technology Guangzhou China

ISBN: (纸本)9781424465408

This paper explains some existing challenges for network topology visualization. An XML schema for network topology description is proposed to achieve the interoperability between different network management applications. For the better understanding of networks, we use XSL T stylesheet to visualize XML topology descriptions as Scalable Vector Graphics (SVG). It has also been explored how to embed JavaScript into SVG to enable interactions between users and network topology graphics. © 2010 IEEE.

关键词： network topology

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From a mess to graphic maps: Visualization of large-scale heterogeneous networks

From a mess to graphic maps: Visualization of large-scale he...

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2010 International Conference on Computer Modeling and Simulation, ICCMS 2010

作者： Wang, Haoxiang Communication and Computer Network Laboratory of Guangdong Province School of Computer Science and Engineering South China University of Technology Guangzhou China

ISBN: (纸本)9780769539416

This paper describes a visualization design for network information representation. The aim of the design is to provide graphical presentations of large-scale and complex networks and help network administrators to manage large-scale networks easily and detect failures on networks promptly. Central to the design is the visualization of network topologies with rich information about the device and connections within the network visually displayed. Based on the design, a prototype application has been implemented using the NetBeans platform, and it has been run over a university-scale network to test the performance. © 2010 IEEE.

关键词： network topology

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A novel algorithm of IPv6 network topology discovery for campus network

A novel algorithm of IPv6 network topology discovery for cam...

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2011 International Conference on Computer science and Service System, CSSS 2011

作者： Dong, Shouling Li, Jia Zhang, Ling Deng, Jianfeng Communication and Computer Network Key Laboratory of Guangdong School of Computer Science and Engineering South China University of Technology Guangzhou China

ISBN: (纸本)9781424497638

Aiming at the limitations of existing methods of IPv6 network topology discovery, this article proposes and implements a novel algorithm of an IPv6-based topology discovery system for the next generation Internet. With the combination of network topology information discovered by general protocols and by routing protocols, the system can discover the IPv6 network effectively not only in accuracy and integrality but also in avoiding alias problem. Besides, much subnet information can be discovered by the system. The system has been tested in the real network environment, which showed the effectiveness and feasibility of this solution. © 2011 IEEE.

关键词： network management

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Enhancing Security of FPGA-Based Embedded Systems with Combinational Logic Binding

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Journal of Computer science & technology 2017年第2期32卷 329-339页

作者： Ji-Liang Zhang Wei-Zheng Wang Xing-Wei Wang Zhi-Hua Xia Software College Northeastern University Shenyang 110169 China Key Laboratory of Computer Network and Information Integration (Southeast University) Ministry of Education Nanjing 210096 China Department of Computer and Communication Engineering Changsha University of Science and Technology Changsha 410014 China School of Computer and Software Nanjing University of Information Science and Technology Nanjing 210044 China

With the increasing use of field-programmable gate arrays （FPGAs） in embedded systems and many embedded applications, the failure to protect FPGA-based embedded systems from cloning attacks has brought serious losses to system developers. This paper proposes a novel combinational logic binding technique to specially protect FPGA-based embedded systems from cloning attacks and provides a pay-per-device licensing model for the FPGA market. Security analysis shows that the proposed binding scheme is robust against various types of malicious attacks. Experimental evaluations demonstrate the low overhead of the proposed technique.

关键词： cloning attack reverse engineering FPGA (field-programmable gate array) security hardware security

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Low-Power Beamforming Design for Near-Field Integrated Sensing and communication networks

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IEEE Internet of Things Journal 2024年第11期12卷 14979-14992页

作者： Cai, Ziwei Sheng, Min Liu, Jia Liu, Junyu Li, Jiandong Xidian University School of Computer Science and Technology Xi'an710071 China Xidian University State Key Laboratory of Integrated Services Network Xi'an710071 China Peng Cheng Laboratory Department of Broadband Communication Guangdong Shenzhen518000 China

Integrated Sensing and communication (ISAC) has emerged as a cornerstone technology for achieving seamless coverage in next-generation networks. Moreover, the advent of extremely large-scale multiple-input multiple-output significantly enhances ISAC's potential, facilitating innovative applications in near-field ISAC. Nonetheless, ISAC networks face numerous challenges, with power consumption being one of the most critical concerns. To address this issue, we propose a novel low-power beamforming approach within the Coordinated Multi-Point (CoMP) ISAC framework. Specifically, our approach involves orchestrating base station cooperation for seamless coverage and synergistically augmenting the sensing beam with the communication beam to reduce power consumption. By utilizing near-field communication theory, we accurately model signal propagation dynamics and formulate a beamforming optimization problem aimed at minimizing transmit power while adhering to transmission rate and object detection constraints, which is a non-convex second-order cone programming problem. To overcome the non-convexity of this problem, we propose a Successive Convex Approximation (SCA)-based beamforming optimization algorithm that ensures convergence. Moreover, we propose a fast-converging algorithm that leverages the unique characteristics of both communication channel and sensing array response vector. Simulation results validate the effectiveness of the proposed scheme for the power minimization problem and yield essential design insights. © 2014 IEEE.

关键词： Near field communication

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Higher throughput and less feedback: Multi-antenna broadcast channels with partial users and limited bits feedback

Higher throughput and less feedback: Multi-antenna broadcast...

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50th Annual IEEE Global Telecommunications Conference, GLOBECOM 2007

作者： Yupeng, Liu Ling, Qiu Personal Communication Network and Spread Spectrum Laboratory Department of Electronic Engineering and Information Science University of Science and Technology of China Hefei Anhui 230027 China

ISBN: (纸本)1424410436

Multi-antenna downlink system with much more users than transmit antennas is considered. With both quantized channel direction and unquantized channel magnitude fed back from all users, this system becomes interference limited with large number of users due to the quantized error of channel direction. We provide a novel method that only partial users feed back the channel information, which can reduce the quantized error of channel direction without increasing the feedback bits of each user. This scheme achieves a higher throughput than that of the system with quantized channel direction and unquantized channel magnitude from all users. Meanwhile, feedback overhead is decreased significantly because of only partial user feedback. Moreover, instead of becoming interference limited, the proposed scheme of partial user feedback maintains the same multiuser diversity as that of the system with perfect CSIT, even with a large number of users. © 2007 IEEE.

关键词： communication channels (information theory)

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An extensible Hadoop framework for monitoring performance metrics and events of OpenStack cloud 3

An extensible Hadoop framework for monitoring performance me...

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3rd IEEE International Conference on Big Data Analysis, ICBDA 2018

作者： Yang, Jianxi Shen, Chaoxiao Chi, Yaping Xu, Ping Sun, Wei Department of Communication Engineering Beijing Electronic Science and Technology Institute Key Laboratory of Network Assessment Technology Institute of Information Engineering CAS Beijing China

ISBN: (纸本)9781538647936

In recent years, many hot topics for research are manipulation of big data, cloud computing and a combination of them. OpenStack is a complex and evolving system that continuously generates vast amounts of metrics and log data. The more complex your system gets, the harder it is to understand its performance and troubleshoot problems, making monitoring a critical piece of the OpenStack control system. In order to effectively create, test and deploy new algorithms or frameworks one need suitable monitoring solutions. However, the conventional monitoring tools lack some performances to keep data freshness from a variety of sources in OpenStack. In the paper we design a critical monitoring solutions based on existing Hadoop architecture integrated with OpenStack clouds. Hundreds of different metrics are gathered form Hadoop metrics subsystem and all data is stored in HBase database to make it ready for processing or displaying it with MapReduce paradigm. With alarms/events generated, we also present a comprehensive view of the status of the infrastructure resources as well as the network services running on OpenStack. © 2018 IEEE.

关键词： Monitoring

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Low-profile Dual-channel Coded Metasurface for Independent Phase Manipulation of Electromagnetic Waves

Low-profile Dual-channel Coded Metasurface for Independent P...

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2024 Photonics and Electromagnetics Research Symposium, PIERS 2024

作者： Li, Wentao Huang, Xiaojun Xi'an University of Science and Technology College of Communication and Information Engineering Shaanxi Xi'an710054 China Key Laboratory of Network Convergence Communication Shaanxi Xi'an710054 China

ISBN: (纸本)9798350375909

Electromagnetic metasurfaces offer unique advantages over traditional materials in manipulating electromagnetic waves. It is crucial to achieve wavefront control across multiple frequencies within a compact space using a single metasurface. In this regard, we propose a reflective encoding metasurface that utilizes adjustments to hexagonal metallic copper rings and copper patches. The metasurface unit is capable of independent phase control for high-frequency and low-frequency electromagnetic waves in dual channels at two distinct frequencies. To optimize the arrangement of metasurface units,we introduce a genetic algorithm that enables the reflection of incident electromagnetic waves in any direction within the half-space. Simulation results demonstrate that the proposed encoding metasurface can flexibly manipulate the beam of incident electromagnetic waves within the half-space at 6GHz and 19GHz. The proposed low-profile encoding metasurface with dual-channel independent phase control will further unlock the application potential of metasurfaces in compact space and multi-channel communication domains. © 2024 IEEE.

关键词： Wavefronts

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A QOS-aware dynamic resources management for datacenter 18

A QOS-aware dynamic resources management for datacenter

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2018 the International Conference on Geoinformatics and Data Analysis, ICGDA 2018 and 2018 the International Conference on Software and Services Engineering, ICSSE 2018

作者： Ge, Lingyu Bai, Yuebin Yu, Chao Zhang, Xudong Wang, Rui Huo, Longshe School of Computer Science and Engineering Beihang University China Science and Technology on Communication Networks Laboratory Shijiazhuang China China Unicom Network Technology Research Insititute Beijing China

ISBN: (纸本)9781450364454

The interference of performance between the latency-critical tasks and batch tasks leads to a low utilization of the load in the data centers, because of the competition of the system resources to guarantee the latency of the latency- critical tasks. Our work is to present a system, a controller to increase the utilization of the data center with latency-critical tasks and batch tasks by ensuring the QOS of the memory bandwidth. It isolates the cpu cores of the two kinds of the tasks to ensure there is no competition of an individual cpu core and adjusts the distribution of the memory bandwidth. We based on the memguard to isolate the memory bandwidth for each core and modify its sharing memory bandwidth to adapt for the condition of hybrid loads. © 2018 Association for Computing Machinery.

关键词： Quality of service

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Improved PEGASIS Routing Protocol for Wireless Sensor networks 7

Improved PEGASIS Routing Protocol for Wireless Sensor Networ...

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7th IEEE Advanced Information technology, Electronic and Automation Control Conference, IAEAC 2024

作者： Chen, Ni Wen, Rong Ma, Shuying Wang, Ping Chengdu Technological University School of Network and Communication Engineering Chengdu China University of Electronic Science and Technology of China National Key Laboratory of Science and Technology on Communications Chengdu China

ISBN: (纸本)9798350339161

PEGASIS protocol is the classic chain routing protocol, its network is formed into a chain by greedy algorithm, the cluster head is generated by random selection, which is easy to lead to uneven energy consumption of the nodes and large network latency. Aiming at these problems, an improved PEGASIS routing protocol for wireless sensor networks is proposed. By calculating the optimal number of clusters, the nodes are divided into several original clusters, and the ant colony optimization algorithm is used to form chains within the clusters. During network operation, dynamic time intervals are taken to update the chains based on the energy of the nodes to prevent premature death of nodes. The results show that the proposed protocol can prolong the lifetime of the network compared with the PEGASIS and PEGASIS-REDP. © 2024 IEEE.

关键词： Routing protocols

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