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Base station (BS) sleeping is an effecting way to improve the energy-efficiency of cellular networks. Considering BS sleep mode operation under different scenarios, we focus on three wake-up policies: single vacation (SV) policy, multiple vacation (MV) policy and N policy. A hysteresis time is also considered to avoid frequent BS mode-changing operation. By modeling the systems as M/G/1 vacation queues,...
With the advent of high speed links, online flow measurement for, e.g., flow round trip time (RTT), becomes difficult due to the enormous amount of requirements on computational resources. We address this problem by proposing the double-deletion bloom filter (DDBF) scheme, which alleviates potential hash collisions of a standard bloom filter by explicitly deleting used records and implicitly deleting...
We consider an integrated service system, where real-time (RT) calls of multiple rate requirements and non-real-time (NRT) calls share the total system capacity. Typically, RT calls are given strict priority over NRT calls, therefore, NRT performance is dependent on the RT process. When RT call arrival processes are not Poisson processes, the effect of the RT traffic burstiness on the NRT performance...
We utilize portfolio theory of finance and investment science in order to show how a cloud broker can select a portfolio of connectivities in order to accommodate requirements for cloud services of users, who need better than the best effort Quality of Service (QoS). Following economic theory, we assume that cloud broker makes his decision by choosing appropriate tradeoff between profit and risk....
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