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We propose a system to detect superspreaders based on combinations of FM sketch, Bloom filter and hash table. It first eliminates sources which are not potential superspreaders, then counts the number of connections to distinct destinations (fan-out) for remaining sources. The proposed system is implemented on NetFPGA platform. Our experiment results show that the system can detect superspreaders...
The current IPsec gateway integrates many functions of IPsec operation, tunnel management and forwarding decision, which makes the IPsec gateway complicated in maintenance and deployment. The problem of maintaining such devices prevents IPsec VPN from applying widely. The emergence of SDN provides an innovative way to decouple the control plane and data plane. In this paper, a Software-Defined IPsec...
This paper presents a 24.25–26.65 GHz 6-bit phase shifter in 65nm CMOS technology. The proposed architecture of the phase shifter divides the 6-bit phase shifter into one 3-bit and three 1-bit sub phase shifters. The low resolution sub phase shifters can be implemented just by switches and sub VGA cells which can lower the phase error apparently. The phase shifter results in a simulated RMS phase...
This paper introduces based on 51 MCU Ethernet interface hardware circuit design and software implementation. Describes how to transplanting ZLIP protocol into the C8051F120 micro controller to debug and run, Experimental results show that the Ethernet system operated normally, better real-time data transmission and stability. This design provides a easy and low cost method of network interface design,...
With the high-speed development of WEB 2.0, the number of web applications continues to grow, making users' behavior become increasingly complex and difficult to monitor. In this paper, we develop a new method for user's behavior characteristics visualization and special user identification. Firstly, we divide all the web applications into 12 kinds and each kind includes several specific applications...
Modern firewalls are becoming complex and anomalies may exist in their rule sets. Security log data, such as firewall logs and logs generated by intrusion detection systems, could provide useful information for the update and addition of existing firewall rule sets. In this paper, we focus on the development of an effective mechanism for firewall rule generation, and proposed an algorithm called Domain-Specific...
TV delivery over IP networks (i.e. IPTV) has emerged as one of the major distribution and access techniques for broadband multimedia services. IPTV adopts H.264 as its coding standard due to its high video compression efficiency as well as powerful error resilience features. This paper presents studies on some of the H.264/AVC error resilience features applied to IPTV applications, namely, high definition...
Virtualization is a common strategy to improve the existing computing resources, particularly in cloud computing field. Hadoop, one of Apache projects, is designed to scale up from single servers to thousands of machines, and each offer local computation and storage. However, how to guarantee stability and reliability have become great study topics. In this article, we use current open-source based...
This paper presents a low phase noise injection-locked doubler-based quadrature voltage controlled oscillator (ILD-QVCO). Instead of using conventional coupling scheme, an injection-locked doubler is introduced in the proposed ILD-QVCO to generate quadarature signals. In this architecture, phase noise is determined by the coupled VCOs, and the phase accuracy is determined by VCO oscillating at twice...
P2P SIP (peer to peer session initiation protocol) systems have emerged as a new trend in multimedia realm due to their abilities to overcome the shortcomings of conventional SIP systems. Most of P2P SIP systems were implemented using Chord, a Distributed Hash Table (DHT) based routing algorithm which can provide scalability and reliability. Previous studies on P2P SIP systems did not address node...
In this paper, a motion control IC for X-Y table using FPGA (Field programmable gate array) technology is presented. To alleviate the effect of unmodelled dynamics and cross interferences while two tables simultaneously motion, an adaptive fuzzy controller (AFC) is used in position loop of X-Y table to improve the motion tracking performance. In implementation, an FPGA embedded by a Nios II processor...
The delivery of High Definition Television (HDTV) over IP networks, namely the HD IPTV, has emerged as one of the major distribution and access techniques for broadband multimedia services. IPTV adopts H.264/AVC as its coding standard due to its high video compression efficiency as well as powerful error resilience features. This paper presents studies on some of these features applied to HD IPTV...
The dynamic reconfiguration technique based on FPGA (field-programmable gate array) can improve the resource utilization. The dynamic reconfiguration principles and methods are discussed. A remote dynamic reconfiguration scheme using Xilinx Virtex-II FPGA and SMCS Ethernet PHY (physical layer transceiver) is proposed. The hardware of system is designed with Xilinx Virtex-IIXC2V30P FPGA that embeds...
This paper presents an FPGA-friendly approach to tracking elephant flows in network traffic. Our approach, single step segmented least recently used (S3-LRU) policy, is a network traffic-friendly replacement policy for maintaining flow states in a Naiumlive hash table (NHT). We demonstrate that our S3-LRU approach preserves elephant flows: conservatively promoting potential elephants and evicting...
In this letter, routing and scheduling information is involved to control assembly process of iBUS, so that iBUS can be applied to differentiated services in IP-over-WDM networks.
Traditional network is surprisingly fragile and difficult to manage. Yet the current solution of substantial manual configuration makes traditional network management expensive and error-prone. To solve this problem, a network control programmable platform is constructed by in this paper. The platform is consisted of a namespace, a network control primitive library, network event library, a network-wide...
Traditional networks are surprisingly fragile and difficult to manage. The problem can partly be attributed to the exposition of too many details of the controlled objects leading to the deluge of complexity in control plane, and the absence of network-wide views leading to the blindness of network management. With these problems, this paper decomposes the necessary network management information...
High Definition (HD) content delivery over IP networks has become a reality in the market of entertainment technologies. This paper presents a professional testbed deployed to emulate a real use case of delivering high definition TV material over an IPTV network. The quality of the delivered H.264/AVC encoded video was evaluated by common objective video quality assessment tools in emulated environment...
This paper proposed an intrusion detection system framework adapt to load characteristic under IPv6/4 environment; it uses decision-tree-based classification method, under guidance of a certain flow, creates dynamically rule matching tree adapt to load characteristic, reduces greatly the rule set that per packet or event need to be detected, improves the detection efficiency, can be utilized to solve...
A novel fast link establishment method based on the combination with Multi protocol Label Switch (MPLS) and mobile agents(MA) for handoff during the mobile IP communication proceeding is proposed. By using the mobile agents for fast automatically information transforming the method can reduce the delay time dramatically. Simulations show that the transmission delay can be reduced to 27 to 41 percents...
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