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arXiv 1503.00648cs.NI
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边缘卸载:HetNets中本地数据存储与卸载的分析与优化

Offloading on the Edge: Analysis and Optimization of Local Data Storage and Offloading in HetNets

Pavlos Sermpezis, Luigi Vigneri, Thrasyvoulos Spyropoulos

摘要:

数据业务需求的快速增长已经使现有蜂窝网络过载。通信架构(例如LTE)的计划升级虽然有帮助,但预计不足以跟上需求。因此,通过小型小区的广泛致密化、更接近或甚至在设备处缓存内容以及设备到设备(D2D)通信被视为未来异构蜂窝网络承受数据紧缩的必要组件。然而,这些选项意味着新的CAPEX和OPEX成本、广泛的回程支持、针对D2D的合同计划激励,以及运营商出现的许多有趣的权衡。在本文中,我们提出了一个分析模型,探讨有多少本地存储和通信通过“边缘”节点可以帮助卸载流量在各种异构网络(HetNet)的设置和用户容忍延迟的水平。然后,我们使用这个模型来优化存储分配和访问模式的不同内容之间的用户满意度和运营商的成本进行权衡。最后,我们通过逼真的模拟验证了我们的研究结果,并表明即使在中等密度水平下,也可以卸载相当数量的流量。

英文摘要:

The rapid increase in data traffic demand has overloaded existing cellular networks. Planned upgrades in the communication architecture (e.g. LTE), while helpful, are not expected to suffice to keep up with demand. As a result, extensive densification through small cells, caching content closer to or even at the device, and device-to-device (D2D) communications are seen as necessary components for future heterogeneous cellular networks to withstand the data crunch. Nevertheless, these options imply new CAPEX and OPEX costs, extensive backhaul support, contract plan incentives for D2D, and a number of interesting tradeoffs arise for the operator. In this paper, we propose an analytical model to explore how much local storage and communication through "edge" nodes could help offload traffic in various heterogeneous network (HetNet) setups and levels of user tolerance to delays. We then use this model to optimize the storage allocation and access mode of different contents as a tradeoff between user satisfaction and cost to the operator. Finally, we validate our findings through realistic simulations and show that considerable amounts of traffic can be offloaded even under moderate densification levels.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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