Enhanced Inter-cell Interference Coordination for Heterogeneous Networks in LTE-Advanced: A Survey

TL;DR

This survey reviews the implementation of time-domain inter-cell interference coordination in LTE-Advanced heterogeneous networks, addressing interference issues caused by unplanned small cell deployments.

Contribution

It provides a comprehensive overview of the physical, network, and back-hauling features of ICIC in LTE-Advanced Rel-10, highlighting key advancements.

Findings

ICIC effectively reduces interference in het-nets.

Rel-10 standard integrates time-domain ICIC for seamless small cell deployment.

Survey covers physical, network, and back-hauling aspects of ICIC.

Abstract

Heterogeneous networks (het-nets) - comprising of conventional macrocell base stations overlaid with femtocells, picocells and wireless relays - offer cellular operators burgeoning traffic demands through cell-splitting gains obtained by bringing users closer to their access points. However, the often random and unplanned location of these access points can cause severe near-far problems, typically solved by coordinating base-station transmissions to minimize interference. Towards this direction, the 3rd generation partnership project Long Term Evolution-Advanced (3GPP-LTE or Rel-10) standard introduces time-domain inter-cell interference coordination (ICIC) for facilitating a seamless deployment of a het-net overlay. This article surveys the key features encompassing the physical layer, network layer and back-hauling aspects of time-domain ICIC in Rel-10.