Two-Dimensional Resource Pattern Optimization for Interference Avoidance in Heterogeneous Networks

Two-Dimensional Resource Pattern Optimization for Interference Avoidance in Heterogeneous Networks
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异构网络中避免干扰的二维资源模式优化

DOI:
10.1109/tvt.2014.2360188
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发表时间:
2015-08
影响因子:
6.8
通讯作者:
Meng, Yun
Meng, Yun
中科院分区:
计算机科学2区
文献类型:
--
作者:
Li, Ji;ong;Li, Hongyan;Wang, Kan;Meng, Yun

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异构网络的干扰管理是近年来的研究热点,通过资源分配避免干扰是一种有效的方法。典型的资源分配方法是在宏小区和毫微微小区之间布置正交资源,诸如在小区间干扰协调(ICIC)中在频域中或者在增强型ICIC(eICIC)中在时域中。然而,无线信道经历的时间频率衰落呼吁2-D资源分配方案。通过基于可变信道条件优化资源模式,并通过引入组套索项,我们的方案利用了时域和频域中的信道变化,此外,避免了干扰。通过在我们的优化模型的资源分组,我们的计划是灵活的和强大的对重突发流量。它在协调开销方面也是轻量级的,并且是完全分布式的,使其适合于标准长期演进(LTE)过程。大量的仿真研究了协调周期和组数对不同性能指标的影响,以及与单独的频域和时域资源分配方法相比,我们所提出的方法的有效性。
Interference management for heterogeneous networks (HetNets) has been a research highlight in recent years; one effective method is interference avoidance by resource allocation. Typical resource-allocation methods are arranging orthogonal resources between a macrocell and femtocells, such as in the frequency domain in intercell interference coordination (ICIC) or in the time domain in enhanced ICIC (eICIC). However, wireless channels experience time–frequency fading appealing for a 2-D resource-allocation scheme. By optimizing the resource pattern based on variable channel conditions and by introducing a group lasso term, our scheme exploits channel variations in both the time and frequency domains and, in addition, avoids the interference. By grouping the resources in our optimization model, our scheme is flexible and robust against heavy bursty traffic. It is also lightweight in terms of coordination overhead and is completely distributed, making it suitable for a standard Long-Term Evolution (LTE) procedure. Extensive simulations investigate the effect of the coordination period and the group number on different performance metrics and the effectiveness of our proposed method compared with sole frequency-domain and time-domain resource-allocation approaches.
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