university of california
Photos: Motor Show showcases the future of car tech
Photo Around 200 FCXs have been built with selected customers currently testing them in Japan and southern California. This one has been developed by a team at the Cranfield University, which has been working on electric powered cars for several years. [25 Jul 2008]
Design of Hybrid Optical Networks With Waveband and Electrical TDM Switching
White Paper By grouping pass-through traffic into wavebands and switching them alloptically, the hybrid architecture can significantly reduce the size of electrical switch and number of associated transponders. As a result, it provides tens of terabits per... [18 Jul 2008]
Distributed QoS Routing for Backbone Overlay Networks
White Paper Due to the difficulty of supporting end-to-end QoS purely in end-user overlays, backbone over-lays for QoS support have been proposed. This architecture advocates the notion of QoS Overlay Network (referred to as QSON) as the backbone service do-main. [18 Jul 2008]
Insecurity in ATM-Based Passive Optical Networks
White Paper 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... [18 Jul 2008]
Bufferless All-Optical Networking With Erasure Codes
White Paper The purpose of this paper is to report results of a simulation experiment to evaluate several topology-based routing algorithms for deflection routing in unstructured networks of switches in order to determine how much packet level erasure... [18 Jul 2008]
Improving Restoration Success in Mesh Optical Networks
White Paper However, even when the network contains sufficient capacity, the restoration paths could be blocked for two different reasons: with distributed restoration path selection schemes, multiple restoration paths may compete for the capacity of the same... [18 Jul 2008]
The Problem of Upstream Traffic Synchronization in Passive Optical Networks
White Paper Recently Passive Optical networks gained a lot of attention as a possible solution to the broadband local access network. One of such problems is upstream traffic synchronization. PON may be deployed as a bus, ring, or tree topology. [18 Jul 2008]
Metropolitan Ethernet Network: A Move From LAN to MAN
White Paper Ethernet has been the indisputable technology of choice for the Local Area Networks (LANs) for more than 30 years. However, there are efforts to assist the transformation of Ethernet from the mainstream LAN technology to the possible adoption for... [18 Jul 2008]
A Review of Traffic Grooming in WDM Optical Networks: Architectures and Challenges
White Paper The transmission capacity of a link in today's optical networks has increased significantly due to Wavelength-Division Multiplexing (WDM) technology. The network performance is now mainly limited by the processing capability of the network elements... [18 Jul 2008]
Practical QoS Network System With Fault Tolerance
White Paper This paper presents an "Emulation environment" for the design and planning of intranets. Intranets must support Quality-of-Service (QoS) for real-time traffic and must be fault-tolerant for mission-critical applications such as tele-medicine. [17 Jul 2008]
Streaming Media Congestion Control Using Bandwidth Estimation
White Paper This work introduces the Streaming Media Congestion Control protocol (SMCC), a new adaptive media streaming congestion management protocol in which the connection's packet transmission rate is adjusted according to the dynamic bandwidth share of... [11 Jul 2008]
On the Scalability of Routing Integrated Time Synchronization
White Paper Time synchronization is a crucial component of a large class of sensor network applications, traditionally implemented as a standalone middleware service that provides a virtual global time to the application layer. [11 Jul 2008]
Detection of Invalid Routing Announcements in RIP Protocol
White Paper Traditional routing protocol designs have focused solely on the functionality of the protocols and implicitly assume that all routing update messages received by a router carry valid information. Although several recent efforts have developed... [11 Jul 2008]
Highly-Resilient, Energy-Efficient Multipath Routing in Wireless Sensor Networks
White Paper Previously proposed sensor network data dissemination schemes require periodic low-rate flooding of data in order to allow recovery from failure. The paper considers constructing two kinds of multipaths to enable energy efficient recovery from... [11 Jul 2008]
Dynamic Group Discovery and Routing in Ad Hoc Networks
White Paper In some applications of large scale Ad Hoc networks, for example, advanced battlefield scenarios, the assumption that different sets of nodes move as groups is extremely helpful in achieving efficient and scalable routing. [11 Jul 2008]
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