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On the delay performance of interference channels

机译：关于干扰信道的延迟性能

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摘要

A deep understanding of the queuing performance of wireless networks is essential for the advancement of future wireless communications. The stochastic nature of wireless channels in general gives rise to a time varying transmission rate. In such an environment, interference is increasingly becoming a key constraint. Obtaining an expressive model for offered service of such channels has major implications in the design and optimization of future networks. However, interference channels are not well-understood with respect to their higher layer performance. The particular difficulty for handling interference channels arises from the superposition of random fading processes for the signals of the transmitters involved (i.e., for the signal of interest and for the signals of the interferers). Starting from the distribution of the signal-to-interference-plus-noise ratio (SINR), we derive a statistical characterization of the underlying service process in terms of its Mellin transform. Then, we adapt a recent stochastic network calculus approach for fading channels to derive measures of the queuing performance of single- and multi-hop wireless interference networks. Special cases of our solution include noise-limited and interference-limited systems. A key finding of our analysis is that for a given average signal and average sum interference power, the performance of interfered systems not only depends on the relative strength of the sum interference with respect to the signal-of-interest power, but also on the interference structure (i.e., the number of interferers) as well as the absolute levels.
机译：对无线网络排队性能的深刻理解对于未来无线通信的发展至关重要。通常，无线信道的随机性导致时变传输速率。在这样的环境中，干扰越来越成为关键的约束。获得用于此类信道的服务的表达模型对未来网络的设计和优化具有重要意义。但是，关于干扰信道的较高层性能，人们对此并不为人所知。对于所涉及的发射机的信号（即，对于感兴趣的信号和对于干扰信号，），随机干扰衰落过程的叠加引起了处理干扰信道的特别困难。从信号干扰加噪声比（SINR）的分布开始，我们根据其Mellin变换得出了基本服务过程的统计特征。然后，我们将最近的随机网络演算方法应用于衰落信道，以得出单跳和多跳无线干扰网络的排队性能的度量。我们解决方案的特殊情况包括噪声受限和干扰受限的系统。我们分析的一个关键发现是，对于给定的平均信号和平均和干扰功率，被干扰系统的性能不仅取决于总和干扰相对于感兴趣信号功率的相对强度，还取决于干扰结构（即干扰源的数量）以及绝对电平。

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