Abstract

In mobile crowd-sensing (MCS) network, it is necessary to reduce the cost of sensing data transformation from mobile devices to the MCS platform in the core of the network. With the widespread deployment of access point (AP), explosive data traffic of the mobile devices is offloaded from cellular base stations to Wi-Fi networks. The congestion of the 2.4 GHz band in dual-band wireless area network makes the lower quality of experience (QoE) of users. To ease the load of 2.4 GHz band, the band-steering technology has been widely used by equipment manufacturers. However, the fixed threshold configuration strategy in band steering technology makes it easy to be exploited by setting up a great number of connection requirements in a short time, which may prevent a normal connection requirement of a user, making it difficult to satisfy the dynamic resource requirements of different services. Moreover, if the threshold is configured too high, it may result in QoE imbalance in dual bands. Besides, when the band (such as 2.4 GHz) resources cannot meet the terminal requirement, the terminal cannot autonomously switch to another band (such as 5 GHz), and this may result in a very poor QoE of users. In this paper, a secure QoE-oriented wireless network optimization framework is proposed to improve the QoE of users in dual-band network. Firstly, to ensure the overall QoE of network and balancing the QoE between 2.4 GHz and 5 GHz bands, the framework dynamically adjusts the load threshold of the frequency band based on QoE information during the association of a terminal. Secondly, to meet the basic QoE requirement of each user, the framework preferentially switches the terminals with poor QoE to the idle band after users join the network. The experimental results show that the proposed framework can improve the QoE both before and after the terminal accesses the network. Additionally, it enables the better QoE balance in dual bands.

中文翻译：

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无线网络中基于QoE优化的频带控制技术

摘要

在移动人群感知（MCS）网络中，有必要降低传感数据从移动设备到网络核心的MCS平台转换的成本。随着接入点（AP）的广泛部署，移动设备的爆炸性数据流量已从蜂窝基站转移到Wi-Fi网络。双频带无线区域网络中2.4 GHz频带的拥塞使用户的体验质量（QoE）降低。为了减轻2.4 GHz频带的负载，频带控制技术已被设备制造商广泛使用。但是，频带控制技术中的固定阈值配置策略通过在短时间内建立大量连接需求而易于利用，这可能会阻止用户的正常连接需求，很难满足不同服务的动态资源需求。此外，如果阈值配置得太高，则可能会导致双频段QoE失衡。此外，当频段（例如2.4 GHz）资源不能满足终端需求时，终端无法自动切换到另一个频段（例如5 GHz），这可能导致用户的QoE非常差。本文提出了一种安全的面向QoE的无线网络优化框架，以提高双频网络中用户的QoE。首先，为了确保网络的总体QoE，并在2.4 GHz和5 GHz频段之间平衡QoE，该框架会在终端关联期间根据QoE信息动态调整频段的负载阈值。其次，为了满足每个用户的基本QoE要求，用户接入网络后，该框架优先将QoE较差的终端切换到空闲频带。实验结果表明，所提出的框架可以改善终端接入网络前后的QoE。此外，它还可以在双频段中实现更好的QoE平衡。