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Based on step recovery characteristics of stepped recovery diode (SRD) at reverse biased, a Second-order Derivative Ultra-wideband (UWB) gaussian pulse generator is designed in this paper. Compared with previous generators based on SRD, a novel structure is adopted in the proposed one. The generator is composed of a shunt SRD, a series SRD, 3 RC networks and a short-circuited microstrip stub. In the...
Network traffic monitoring and traffic characterization are essential for network management and optimization. Extensive researches have been conducted in the past to characterize the network traffic. However, due to the increasing number of ADSL and CDMA users and the rapid development of new services in China, the results are out-of-dated and a deep understanding of the traffic pattern in both networks...
Peer-to-peer (P2P) communication systems have become increasingly popular in recent years due to its high scalability and low deployment cost. In those systems, resource constrained nodes are unwelcome to other peers since they contribute too few resources to route messages and store data for other nodes. As a result, it remains a great challenge to increase the service availability for resource constrained...
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