Early-Late Protocol for Coordinated Beam Scheduling in mmWave Cellular Networks

Ziyuan Sha, Zhaocheng Wang, Sheng Chen, L. Hanzo
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引用次数: 5

Abstract

As a benefit of using highly directional beams in millimeter wave systems, the downlink inter-cell interference (ICI) imposed on the users can be avoided, provided that the beams of neighbor cells do not point towards the user. We exploit this by designing a protocol for network-coordinated time- domain beam scheduling. Specifically, every pair of two neighbor cells maintains a beam collision table for recording the beam pairs that may inflict ICI upon each other. Then, to avoid beam-collision, the two neighbor cells exchange the necessary information to avoid the simultaneous activation of two beams recorded in one pair. More explicitly, our protocol supports a distributed cell coordination method without requiring any information exchanged between the user and the base station, once the beam collision table has been established. Furthermore, our theoretical analysis and numerical simulations demonstrate that the proposed protocol is capable of efficiently mitigating the ICI between the adjacent cells and hence improves the overall network performance.
毫米波蜂窝网络中协调波束调度的早-晚协议
在毫米波系统中使用高度定向波束的一个好处是,只要邻近小区的波束不指向用户,就可以避免对用户施加的下行小区间干扰(ICI)。为此,我们设计了一种网络协调时域波束调度协议。具体地说,每一对相邻的两个单元都维护一个光束碰撞表,用于记录可能相互造成ICI的光束对。然后,为了避免波束碰撞,两个相邻的细胞交换必要的信息,以避免同时激活记录在一对中的两个波束。更明确地说,我们的协议支持一种分布式小区协调方法,一旦建立了波束冲突表,就不需要在用户和基站之间交换任何信息。此外,我们的理论分析和数值模拟表明,所提出的协议能够有效地减轻相邻单元之间的ICI,从而提高整体网络性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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