university of california Resources

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Uncoordinated Load Balancing and Congestion Games in P2P Systems: In P2P systems, users often have many choices of peers from whom to download their data. Each user cares primarily about its own response time, which depends on how many other users also choose that same peer. This interaction is best modeled as a game among self-interested agents, which is...; Tags: Load Balancing, P2P, University Of California, Games, Peer To Peer (P2P), Network Technology, Personal Technology, Internet, Networking; White papers 2008-01-01
Energy Characterization of the Stargate Sensor Network Gateway: This paper presents a new energy estimation model for sensor network intermediate nodes (i.e. the Crossbow XScale Stargate). Such devices are battery powered and resource constrained and commonly employed as communication, processing, and gateway elements within sensor networks. Understanding and accurately characterizing the energy behavior of such devices is the...; Tags: Gateway Inc., Network, Battery, Sensor, University Of California, Engineering; White papers 2008-01-01
Insecurity in ATM-Based Passive Optical Networks: This paper considers the security of an ITU standard for ATM-based passive optical networks. First, it shows that the standard's encryption algorithm, called churning, has an effective 8-bit key length and thus is trivial to break with exhaustive keysearch. Second, it shows that the authentication mechanisms have significant weaknesses. The...; Tags: Optical Network, University Of California, ATM, Fiber Optics, Optical Networking, Networking, Network Technology, Security, Telecommunications; White papers 2008-01-01
E-mail4B: An E-mail System for the Developing World: This paper presents E-mail4B, a prototype e-mail delivery system targeted for developing regions. Effectively deploying networked applications in these challenging environments requires adopting a new architecture design to address the inherent cost and infrastructure demands. This project evaluates the Technology and Infrastructure for Emerging Regions TIER architecture through an initial...; Tags: Architecture, University Of California, E-mail, Online Communications; White papers 2007-12-01
Lightpath-Level Protection Versus Connection-Level Protection for Carrier-Grade Ethernet in a Mixed-Line-Rate Telecom Network: Ethernet is a success story in Local Area Networks LAN. Efforts for extending its boundaries beyond LAN to the carriers' backbone networks are in progress. The paper studies the problem of designing reliable and cost-efficient high-rate (100 Gbit/s) carrier-grade Ethernet in a multi-line-rate telecom network under signal transmission-range constraints. Reliability...; Tags: Protection, Network, University Of California, Ethernet, Networking, LANs, Network Technology; White papers 2007-11-30

Enhancing TCP Over HSDPA by Cross-Layer Signalling: A comprehensive performance evaluation of a cross-layer solution to increase users' downlink data rates over HSDPA is provided. The solution consists of a proxy entity between a server and the Radio Network Controller, and cross-layer signaling from the base station to the proxy. The performance of the solution is evaluated...; Tags: HSDPA, Solution, Radio, TCP, University Of California, Tcp/Ip, Cellular Phones, Internet, Advertising & Promotion, Networking, Consumer Electronics, Personal Technology, Marketing; White papers 2007-09-24
Generic Parallel Processing Techniques for Nanoscale Spin-Wave Architectures: This paper studies the algorithm design aspects of three newly developed spin-wave architectures. The architectures are capable of simultaneously transmitting multiple signals using different frequencies, and allow for concurrent read/write operations. Using such features, the paper introduces a set of generic parallel processing techniques that can be used for routing...; Tags: Parallel Processing, Architecture, University Of California, Productivity, Engineering; White papers 2007-08-21
Evaluating the Impacts of Network Information Models on Applications and Network Service Providers: Configurable optical networks and wide-area resource sharing in the form of Grid computing provide intriguing opportunities for new application capabilities and resource efficiencies. The resulting Lambda-Grid is a collection of geographically dispersed compute, storage and visualization resources that can be interconnected on-demand with private, high speed optical circuits (i.e., lambdas)....; Tags: Network, Network Service, University Of California, Networking; White papers 2007-06-29
Interface Split Routing for Finer-Grained Traffic Engineering: Legacy IP routing restricts the efficacy of traffic engineering solutions. This restriction stems from the constraint that traffic at a node must be uniformly split across all next-hop nodes corresponding to equal cost shortest paths to a destination. Proposals that alleviate this constraint either completely overhaul legacy IP routing, or...; Tags: IP, University Of California, Network Technology, Networking; White papers 2007-06-13
Hardware Assisted Compression in Wireless Sensor Networks: A Wireless Sensor Network WSN is comprised of resource constained devices called motes. Motes are battery operated and must conserve as much power as possible. Power usage for each mote is made up of processing data, sensing the surroundings, and sending and receiving packets. The bulk of power usage for...; Tags: Packet, Network, Sensor, Hardware, University Of California, Wireless Sensor Network, Wi-Fi, Wireless; White papers 2007-05-27
Spamscatter: Characterizing Internet Scam Hosting Infrastructure: Unsolicited bulk e-mail, or SPAM, is a means to an end. For virtually all such messages, the intent is to attract the recipient into entering a commercial transaction - typically via a linked Web site. While the prodigious infrastructure used to pump out billions of such solicitations is essential, the...; Tags: University Of California, Internet, E-mail, Web Site Development, Online Communications; White papers 2007-05-14
Flushing Policies for NVCache Enabled Hard Disks: One of the goals of upcoming hybrid hard disk is to reduce power consumption by adding a small amount of Non-Volatile flash memory NVCache to the drive itself. By using the NVCache to satisfy writes while the rotating media is spun-down, hard disk power consumption can be decreased by lengthing...; Tags: Hard Drive, Media, Power Consumption, University Of California, NVCache, Advertising & Promotion, Marketing; White papers 2007-05-01
Input Validation of Client-Server Web Applications Through Static Analysis: While early web applications were created with all data processing done on the server, the expansion in the use of scripting languages embedded in web browsers (specifically, dialects of ECMAscript - JavaScript and JScript) in techniques such as AJAX have allowed for change in the design of web applications. They...; Tags: Client-server, Web Application, Web Browser, Analysis, University Of California, AJAX, Scripting Languages, Web Browsers, Servers, Internet, Software/Web Development, Web Development, Web 2.0, Hardware; White papers 2007-04-30
Algorithm/Architecture Co-Exploration for Designing Energy Efficient Wireless Channel Estimator: A Wireless Sensor Network WSN is comprised of motes which are resource constraint devices. Motes are battery operated and must conserve as much power as possible. Power usage for each mote is made up of processing data, sensing the surroundings, and sending and receiving packets. This paper proposes a solution...; Tags: Hardware, University Of California, Wireless, Wireless Sensor Network; White papers 2007-04-29
Wireless Industrial Monitoring and Control Using a Smart Sensor Platform: A wireless smart sensor platform based on patent pending technologies targeted for instrumentation and predictive maintenance system is presented in this paper. The generic smart sensor platform with 'Plug-and-play' capability supports hardware interface, payload and communications needs of multiple inertial and position sensors, and actuators, using a RF link (Wi-Fi,...; Tags: Monitoring, Firmware, University Of California, Sensor Platform, Wi-Fi, Wireless; White papers 2007-04-12
Beyond Bug-Finding: Sound Program Analysis for Linux: It is time to focus on sound analyses for the critical systems software - that is, it must focus on analyses that ensure the absence of defects of particular known types, rather than best-effort bug-finding tools. This paper presents three sample analyses for Linux that are aimed at eliminating bugs...; Tags: Analysis, University Of California, Linux, UNIX, Operating Systems, Workforce Management, Open Source, Software, Human Resources; White papers 2007-04-09
Improving XCP to Achieve Max-Min Fair Bandwidth Allocation: TCP is shown to be inefficient and instable in high speed and long latency networks. The eXplicit Control Protocol XCP is a new and promising protocol that outperforms TCP in terms of efficiency, stability, queue size, and convergence speed. However, Low et al. recently discovered a weakness of XCP. In...; Tags: Bandwidth, TCP, Allocation, University Of California, XCP, Tcp/Ip, Networking; White papers 2007-02-27
Relative Accuracy Based Location Estimation in Wireless Ad Hoc Sensor Networks: In sensor networks, the location of a sensor making an observation is a vital piece of information to allow accurate data analysis. GPS is an established technology to enable precise position information. Yet, resource constraints and size issues prohibit its use in small sensor nodes that are designed to be...; Tags: Network, Positioning, Sensor, Accuracy, GPS, University Of California, Wireless, Branding, Engineering, Marketing; White papers 2007-02-20
On the Role of Helpers in Peer-to-Peer File Download Systems: Design, Analysis and Simulation: While BitTorrent has been successfully used in peer-to-peer content distribution, its performance is limited by the fact that typical internet users have much lower upload bandwidths than download bandwidths. This asymmetry in bandwidth results in the overall average download speed of a BitTorrent-like file download system to be bottle-necked by...; Tags: Bandwidth, BitTorrent, P2P, Analysis, University Of California, Peer To Peer (P2P), Internet; White papers 2007-01-25
On the Optimality and Interconnection of Valiant Load-Balancing Networks: The Valiant Load-Balancing VLB design has been proposed for a backbone network architecture that can efficiently provide predictable performance under changing traffic matrices. This paper shows that the VLB network has optimal performance when nodes can fail, in the sense that it can support the maximal homogeneous flow for any...; Tags: Network, Interconnection, University Of California, VLB, Performance Management, Networking, Human Resources, Workforce Management; White papers 2007-01-22