Stochastic-Geometry-Based Performance Analysis of Delayed Mobile Data Offloading With Mobility Prediction in Dense IEEE 802.11 Networks

Stochastic-Geometry-Based Performance Analysis of Delayed Mobile Data Offloading With Mobility Prediction in Dense IEEE 802.11 Networks
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基于随机几何的密集 IEEE 802.11 网络中具有移动性预测的延迟移动数据卸载性能分析

DOI:
10.1109/access.2017.2764104
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发表时间:
2017-10
期刊:
影响因子:
3.9
通讯作者:
Li Qishan
Li Qishan
中科院分区:
计算机科学3区
文献类型:
--
作者:
Hu Zhiqun;Lu Zhaoming;Wen Xiangming;Li Qishan

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通过Wi-Fi进行移动数据卸载是缓解蜂窝网络数据爆炸式增长的一种很有前景的解决方案。虽然在移动数据卸载方面进行了大量的尝试,但以往的研究很少关注网络特性(如Wi-Fi部署密度)及其对整体移动数据卸载性能的影响。在本文中,我们提出了一个随机几何模型来分析带有机动性预测的容延迟卸载的性能。我们的目标是了解网络参数(如网络大小和信道条件)如何影响密集Wi-Fi区域的长期卸载潜力。Wi-Fi的部署建模为独立的泊松点过程(PPP),以考虑干扰和基于CSMA/ ca的介质访问控制协议的影响。然后利用半马尔可夫过程对考虑逗留时间的用户运动进行建模。基于PPP部署和半马尔可夫过程,我们可以得到潜在的卸载流量。通过上述提出的分析研究,网络提供商可以很容易地对给定密集网络的平均卸载性能进行粗略估计。
Mobile data offloading through Wi-Fi is a promising solution to alleviate the explosive data increase in cellular network. While extensive attempts have been made at mobile data offloading, previous studies have rarely paid attention to network characteristics (e.g. Wi-Fi deployment density) and its effect on overall mobile offloading performance. In this paper, we propose a stochastic geometry model for the performance analysis of delay-tolerant offloading with mobility prediction. We aim to understand how the network parameters, such as network size and channel condition, affect the long-term offloading potential in the dense Wi-Fi sitting. The deployment of Wi-Fi is modeled as an independent Poisson point process (PPP) to take the effect of interference and CSMA/CA-based medium access control protocol into account. Then the semi-Markov process is used to model the user’s movement taking the sojourn time into account. Based on the PPP deployment and semi-Markov process, we can obtain the potential offloading traffic. Through the above proposed analytical studies, the network providers can easily obtain a rough estimation on the average offloading performance from a given dense network.
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