On Opportunistic mmWave Networks With Blockage
On Opportunistic mmWave Networks With Blockage
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DOI：
10.1109/jsac.2017.2720278
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发表时间：
2017-09-01
影响因子：
16.4
通讯作者：
Aazhang, Behnaam
中科院分区：
文献类型：
--
作者：
Ramirez, David;Huang, Lei;Aazhang, Behnaam
使用毫米波（mmWave）信令迁移到更高频率将扩展网络容量，以满足当前对更高吞吐量的需求。然而，随着用户和接入点（AP）密度的增加，集中式调度器在毫米波网络中起作用所需的开销成本迅速变得棘手。或者，毫米波网络中的用户机会性地进行传输的分散式方法可以从更高的AP密度中大大受益。利用针对毫米波网络规划的AP分集，用户可以在选择用于传输的目的地AP之前顺序地探测AP。毫米波网络中的机会主义用户必须平衡AP分集的好处和开销成本。我们提出了一个毫米波机会网络模型，包括AP变得不可用的概率和初始接入的成本。我们的最优机会策略是一组阈值，这是可计算的先验。我们的策略的平均开销，延迟和吞吐量的界限。通过数值分析，我们表明，在有限的和相对较小的探测，我们提出的策略优于实际的替代品。
Migrating to higher frequencies using millimeter wave (mmWave) signaling will expand the networks capacity to satiate the current demand for higher throughput. However, the overhead cost required for a centralized scheduler to function in an mmWave network quickly becomes intractable as user and access point (AP) density increase. Alternatively, a decentralized approach where users in mmWave networks opportunistically transmit may greatly benefit from a higher AP density. Taking advantage of the AP diversity projected for mmWave networks a user may sequentially probe APs before selecting a destination AP for transmission. An opportunistic user in an mmWave network must balance the benefit of AP diversity against the overhead cost. We present an mmWave opportunistic network model encompassing the probability of an AP becoming unavailable and the cost of initial access. Our optimal opportunistic strategy is a set of thresholds, which are computable a priori. Bounds on average overhead, delay and throughput of our strategy are also presented. Via numerical analysis, we show that at finite and relatively small probings our proposed strategy outperforms practical alternatives.