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This paper first introduces existing congestion control algorithms and analyses their weakness. And after discusses the features and requirements of network topology simulation system, a congestion control scheme based on improved RED algorithm named DFCC was presented. DFCC reduces the package loss by adjusting link delay dynamically when congestion happens. And by means of twice optimization of...
A fully integrated LC voltage controlled oscillator (VCO) with 1V low voltage supply, applied in the frequency synthesizer of 2.4GHz IEEE802.15.4/ZigBee Wireless Sensor Network (WSN), is designed and implemented based on TSMC 0.18µm RF/MS CMOS process with low power dissipation and excellent phase noise performance. The possible structures under 1V voltage supply are compared and this paper uses PMOS...
According to Chord protocol of P2P network, entries in the routing table are placed at a long distances that are all powers of 2 and only cover half of the identifier space. Therefore, an improved Chord routing algorithm is proposed. The algorithm presents a new routing table structure formula, increases entries distribution density, and extends routing searching coverage areas. Performance analysis...
The selection strategy of overlay link directly affects the performance of overlay network routing, and another important factor that can affect the performance of overlay network is that the overlay link has an exorbitant level of reuse with the physical link, but they are not much considered in previous studies. Taking full account of various factors that can affect the performance of overlay network...
In wireless Ad Hoc network, the lower nodes transmitting interference to achieve the control of network conflict is one of the targets of network topology control. Based on the analysis of Ad Hoc network model and network interference model, this paper proposes the node interference model and the link interference model, and proposes a minimize link interference topology control algorithm with t-spanner...
Many researchers think that networks with small world effect are always more effective for spread of behavior, but a fewer studies indicated that the behavior spread farther and faster in clustered-lattice networks than in other networks. In this paper, we analyzed the spread of behavior in unstructured peer-to-peer networks with three different topologies. The experimental results show that to get...
The Constant Degree P2P systems are turning into the research hotspot, but all topologically-aware technologies perform poorly when replanted to them. Combining constant degree topologies' property and taking FissionE as an example, we propose a merge technology RBFIM (Relaxed Balance based fast Induced Merge) to optimize the construction of topologically-aware hierarchy constant degree P2P Systems...
one of the key activities in service-oriented solution development is the identification of services according to a set of predefined design principles. Existing Top-Down technique is normal way for service identification and some relative further research are based on it. They all paid more attention to how to automatic decompose business and take bottom/leaf actives as a candidate service while...
This paper presents a few design considerations in implementing building block-based Computer Aided Design (CAD) for analog switched circuits. The considered synthesis include four independent levels: 1) system level, 2) building block level, 3) circuit simulation level, and 4) layout generation, which multistage can separate a larger size circuit into a few major basic building blocks. The aim of...
Systems as diverse as genetic networks or the World Wide Web are best described as networks with complex topology. A common property of many large networks is that the vertex connectivities follow a scale-free power-law distribution. This feature was found to be a consequence of three generic mechanisms: (i) networks expand continuously by the addition of new vertices, (ii) new vertex with priority...
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