Versatile Controllability over Cell Switching for Speedy Users in LTE HetNets

Abstract

The heterogeneous networks (HetNets) are regarded as a promising solution in LTE-Advanced for ubiquitous and cost effective broadband user experience. But there are challenges to support seamless mobility in Het-Nets, especially, when the user speed is high. In this paper, we investigate these challenges and study the scopes to address them for the improvement of cell edge performance. The study indicates the requirement of enhanced and versatile controllability over adaptation of cell switching parameters that simultaneously depends on variation in user speeds, traffic loads, street patterns, types of cells involved in switching, and so forth. We propose a scheme to scale cell switching parameters that incorporates Doppler spread estimation and adapts smoothly to various changes. Both the eNodeB and the UE participate in a versatile control over the scaling. Limited simulations have been performed to partially reflect the outcome of the proposed scheme.

Determination of the Traffic Properties of Cells with Mobile Users Using a Mixed Traffic

“…The examples in this paper are for V = 5 km/h and R = 100 m. Besides, in this paper are analyzed characteristics of macrocells in rural (R = 10 km) and urban area (R = 1 km) where users' speed is variable. Nevertheless, in the conditions of greater users' moving speed it is necessary to carefully anticipate the moment of new cell selection when handover is realized [12]. Such an analysis decreases the number of unnecessary handovers due to the lack of idle channels or idle waiting spaces, but also it is necessary to implement new, specific traffic models [13].…”

Quick Handover in 5G for High Speed Railways and Highways Using Forward Handover and PN Sequence Detection

“…The authors of [7]- [10] propose different adaptive hysteresis schemes based on a cost function that takes into account some important aspects of the mobile relay, such as cell load, relay speed, and the requested service category by the UE. The authors of [11] present a HetNets-based scheme for scaling cell switching parameters that integrate Doppler spread estimation and adjust to changes seamlessly. Both the eNodeB and the UE are involved in a flexible scaling control.…”