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首页> 外文期刊>IEEE Transactions on Parallel and Distributed Systems >Trustworthy Operations in Cellular Networks: The Case of PF Scheduler
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Trustworthy Operations in Cellular Networks: The Case of PF Scheduler

机译：蜂窝网络中的可信操作：PF调度程序的情况

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摘要

Cellular data networks are proliferating to address the need for ubiquitous connectivity. To cope with the increasing number of subscribers and with the spatiotemporal variations of the wireless signals, current cellular networks use opportunistic schedulers, such as the Proportional Fairness scheduler (PF), to maximize network throughput while maintaining fairness among users. Such scheduling decisions are based on channel quality metrics and Automatic Repeat reQuest (ARQ) feedback reports provided by the User's Equipment (UE). Implicit in current networks is the a priori trust on every UE's feedback. Malicious UEs can, thus, exploit this trust to disrupt service by intelligently faking their reports. This work proposes a trustworthy version of the PF scheduler (called TPF) to mitigate the effects of such Denial-of-Service (DoS) attacks. In brief, based on the channel quality reported by the UE, we assign a probability to possible ARQ feedbacks. We then use the probability associated with the actual ARQ report to assess the UE's reporting trustworthiness. We adapt the scheduling mechanism to give higher priority to more trusted users. Our evaluations show that TPF 1) does not induce any performance degradation under benign settings, and 2) it completely mitigates the effects of the activity of malicious UEs. In particular, while colluding attackers can obtain up to 77 percent of the time slots with the most sophisticated attack, TPF is able to contain this percentage to as low as 6 percent.
机译：蜂窝数据网络正在激增，以解决对普遍连接的需求。为了应对用户数量的增加和无线信号的时空变化，当前的蜂窝网络使用机会调度器（例如，比例公平调度器（PF））来最大化网络吞吐量，同时保持用户之间的公平。这样的调度决定是基于信道质量度量和由用户设备（UE）提供的自动重传请求（ARQ）反馈报告。当前网络中隐含的是对每个UE反馈的先验信任。因此，恶意UE可以通过智能伪造其报告来利用这种信任来破坏服务。这项工作提出了PF调度程序的可信赖版本（称为TPF），以减轻此类拒绝服务（DoS）攻击的影响。简而言之，基于UE报告的信道质量，我们为可能的ARQ反馈分配概率。然后，我们使用与实际ARQ报告关联的概率来评估UE的报告可信度。我们调整了调度机制，将更高的优先级赋予了更多可信任的用户。我们的评估表明，TPF 1）在良性设置下不会引起任何性能下降，并且2）它完全减轻了恶意UE活动的影响。特别是，虽然合谋的攻击者可以通过最复杂的攻击获得多达77％的时隙，但TPF能够将这一百分比降低到6％。

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