LTE-Advanced: Heterogeneous networks

Abstract

Abstract-Long-Term Evolution (LTE) allows operators to use new and wider spectrum and complements 3G networks with higher data rates, lower latency and a flat IP-based architecture. To further improve broadband user experience in a ubiquitous and cost effective manner, 3GPP has been working on various aspects in the framework of LTE Advanced. Since radio link performance is approaching theoretical limits with 3G enhancements and LTE, the next performance leap in wireless networks will come from the network topology. LTE Advanced is about improving spectral efficiency per unit area. Using a mix of macro, pico, femto and relay base-stations, heterogeneous networks enable flexible and low-cost deployments and provide a uniform broadband experience to users anywhere in the network. This paper discusses the need for an alternative deployment model or topology using heterogeneous networks. To enhance the performance of these networks, advanced techniques are described which are needed to manage and control interference and deliver the full benefits of such networks. Range extension allows more user terminals to benefit directly from low-power base-stations such as picos, femtos, and relays. Adaptive inter-cell interference coordination provides smart resource allocation amongst interfering cells and improves inter-cell fairness in a heterogeneous network. In addition, the performance gains with heterogeneous networks using an example macro/pico network are shown.

Enhanced inter-cell interference coordination in co-channel multi-layer LTE-advanced networks

“…In this article we focus on 3GPP LTEAdvanced multi-layer networks with macrocells, complemented by pico nodes and/or home base stations (HeNBs) for improved performance [3,4]. Especially the uncoordinated deployment of HeNBs has recently attracted attention in research, where aspects such as interference avoidance, off-load effects, and architecture/access constraints have been studied [5].…”

Energy Efficient Multimedia Delivery Services over LTE/LTE-A

“…These are a single frequency network eMBMS (SFN-eMBMS) and a single-cell eMBMS (SC-eMBMS) configuration [6]. Furthermore, we extend this analysis to eMBMS provisioning over more interesting and dynamic Heterogeneous Network (HetNets) environment [7]. However, we note that the results and methodology introduced in this paper are general and could be extended for comparison of different LTE/LTE-A multimedia delivery services over various upcoming heterogeneous LTE (HetNets) network configurations.…”

Packet Discrimination Method Using Artificial Frequency Offsets for Low Decoding Power Consumption in Heterogeneous Cooperative Communication Systems

“…현재의 이기종 네트워크는 사 업자의 계획에 의해 설치된 셀룰러 네트워크에 무선 랜이 혼재하는 형태로 이루어져 있으며 이기종 네트 워크를 효과적인 이용 방안에 대한 표준화를 제시하 고 있다 [5] . 시스템의 도움을 받는 방법을 고려하고 있다 [6,7] .…”