An Analytical Framework for Multicell Cooperation via Stochastic Geometry and Large Deviations

Abstract

Abstract-Multi-cell cooperation (MCC) is an approach for mitigating inter-cell interference in dense cellular networks. Existing studies on MCC performance typically rely on either over-simplified Wyner-type models or complex system-level simulations. The promising theoretical results (typically using Wyner models) seem to materialize neither in complex simulations nor in practice. To more accurately investigate the theoretical performance of MCC, this paper models an entire plane of interfering cells as a Poisson random tessellation. The base stations (BSs) are then clustered using a regular lattice, whereby BSs in the same cluster mitigate mutual interference by beamforming with perfect channel state information. Techniques from stochastic geometry and large-deviation theory are applied to analyze the outage probability as a function of the mobile locations, scattering environment and the average number of cooperating BSs per cluster, . For mobiles near the centers of BS clusters, it is shown that outage probability diminishes as O(e − ν 1 ) with 0 ≤ ν1 ≤ 1 if scattering is sparse, and as O( −ν 2 ) with ν2 proportional to the signal diversity order if scattering is rich. For randomly located mobiles, regardless of scattering, outage probability is shown to scale as O( −ν 3 ) with 0 ≤ ν3 ≤ 0.5. These results confirm analytically that cluster-edge mobiles are the bottleneck for network coverage and provide a plausible analytic framework for more realistic analysis of other multi-cell techniques.

User-Centric Intercell Interference Nulling for Downlink Small Cell Networks

“…There have been prior studies on interference management in cellular networks [27]- [32]. In [27] and [28], all the BSs in the network are grouped into disjoint clusters, and each BS will avoid intercell interference to users in other cells within the same cluster with interference nulling beamforming. Joint transmission was investigated in [29] and [30], where each user is served by several nearby single-antenna BSs under the assumption that the user data is shared between these BSs with high-capacity backhaul links.…”

Модель На Процессе Матерна Для Подавления Межсотовой Интерференции В Системах Многосотовой Кооперации

“…Среди других, межсотовая интерференция ICI (inter cell interference) есть одним из наиболее слож-но-преодолимых недостатков систем беспро-водной связи. Многосотовая кооперация MCC (multi cell cooperation) является одним из спо-собов преодоления ICI [1, 2]. Пуассоновский процесс PPP (Poisson point process) часто ис-пользуется для моделирования расположения базовых станций (БС) в сотовых системах свя-зи [3].…”

A Downlink Interference Suppression Scheme for Ultra Dense Networks

“…In the interference management, the traditional frequency reuse scheme is based on user classification which divides the users into central users and edge users, and the performance will be limited to the edge users. There is also an existing interference management method which divides the whole network into disjoint clusters, and the performance will be limited to cluster edge users [5][6] as well. However, in the 5G UDN network, the low-power nodes are densely distributed and have a small coverage area.…”