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For an energy harvesting wireless network (EHWN), power oscillation will occur in uplink signal-to-interference-plus-noise ratio-based power control if some energy-non-supported nodes exist. Power oscillation will destroy power control algorithm's convergence and influence the system's stabilisation no matter the EHWN is feasible or infeasible. Unfortunately, existing algorithms cannot avoid the power...
Traffic modeling contributes remarkably to network design and performance evaluation in wireless networks. Various traffic models have been proposed for wireless networks thus far.. In order to provide a better understanding in this area, the article presents a detailed investigation to current studies of traffic models in different wireless networks. And then the origins of model differences are...
In this paper, a novel channel estimation scheme called Two-Pilot Estimation (TPE) is proposed for distributed space-time decoding in Amplify-and-Forward (AF) based wireless relay networks. For Maximum Likelihood (ML) decoding at the destination, directly estimating the product of source-relay (S-R) channel and relay-destination (R-D) channel either is difficult, or causes drastic receiver degradation...
In this paper, web response time is utilized to indicate the performance of web cache in asymmetrical wireless network. The impacts of WAN delay, user load level and link asymmetries on web response time are investigated in our evaluation. Our study demonstrated that caching scheme performs poorly when uplink quality degraded. Based on the analysis of correlations between cache performance and link...
Rate and diversity impose a fundamental tradeoff in wireless communication. We propose a novel distributed space-time coding (DSTC) scheme based on linear constellation precoding (LCP) for Amplify-and-Forward relaying networks. The proposed scheme can achieve full-diversity or full-rate, and also offers a flexibility for a desired rate-diversity tradeoff. This scheme works well with arbitrary signal...
In this paper, we described the correlations between user perceived Web response time and the asymmetrical link characteristics. Our study demonstrated that the HTTP compression strongly affects the Web response time when uplink resources are limited. The constraints on uplink degrade Web performance seriously. In addition, we also found that it is possible to reduce Web response time through cross...
In this work the authors show how the asymmetry characteristics of wireless network strongly affects the Web response time of user. It is found that uplink delay degrades Web performance because additional bytes overhead and time overhead are introduced. On the other hand, the study also shows that reduction of Web response time is possible through protocol optimization on different layer of protocol...
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