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Proceedings ArticleDOI

Intra-frequency handover algorithm design in LTE networks using Doppler frequency estimation

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TLDR
A dynamic method to trigger the handover algorithm in LTE networks is proposed, which utilizes Doppler frequency estimation in the downlink for adjustment and shows a marked decrease in the average number of handovers.
Abstract
A dynamic method to trigger the handover algorithm in LTE networks is proposed. The method utilizes Doppler frequency estimation in the downlink for adjustment. This method is beneficial for high speed mobiles in micro cells, where the cell radius is small and needs a dynamic algorithm to respond in a timely manner. Comparison to the practical handover triggering method, which is currently implemented in LTE is evaluated1. Simulations at the system level show a marked decrease in the average number of handovers.

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Citations
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Journal ArticleDOI

An Enhanced Handover Scheme for Mobile Relays in LTE-A High-Speed Rail Networks

TL;DR: An enhanced handover scheme is proposed, which contains an enhanced measurement procedure, which can accelerate the measurement procedure when the mobile relay knows that the train is moving toward some neighbor DeNBs, and a group in-network handover procedure which can aggregate similar in network handover procedures in the core network.
Journal ArticleDOI

Achieve Secure Handover Session Key Management via Mobile Relay in LTE-Advanced Networks

TL;DR: A secure handover session key management scheme via mobile relay in LTE-A networks that can successfully establish session keys between the on-board UEs and their connected DeNB, achieving backward and forward key separations, and resisting against the collusion between the MRN and the DeNB as the same time.
Proceedings ArticleDOI

Privacy-Preserving Intra-MME Group Handover via MRN in LTE-A Networks for Repeated Trips

TL;DR: A privacy preserving intra Mobility Management Entity (MME) group handover scheme in LTE-A networks for repeated trips to prevent MRNs and eNBs from tracking passengers' locations especially if they take same trip regularly.
Patent

Cell selection for airborne mobile cellular communications equipment

TL;DR: In this article, a network node in a cellular telecommunications system hands over responsibility for serving a wireless communication equipment from a serving cell to a target cell, wherein the communication equipment is situated in a first aircraft that is in-flight.
Journal ArticleDOI

Doppler frequency estimation-based handover algorithm for long-term evolution networks

TL;DR: A simple handover mechanism to adapt for a fast moving mobile station requesting a handover, in which the authors utilise a Doppler frequency estimation in the downlink for adjustment and apply it to a long-term evolution (LTE) network.
References
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Journal ArticleDOI

Correlation model for shadow fading in mobile radio systems

TL;DR: In this article, a simple autocorrelation model for shadow fading in mobile radio channels is proposed, which is fitted to both large cells and microcells, and results show that the model fit is good for large to medium cells.
Book

MIMO-OFDM Wireless Communications with MATLAB

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Journal ArticleDOI

LTE-advanced: next-generation wireless broadband technology [Invited Paper]

TL;DR: An overview of the techniques being considered for LTE Release 10 (aka LTEAdvanced) is discussed, which includes bandwidth extension via carrier aggregation to support deployment bandwidths up to 100 MHz, downlink spatial multiplexing including single-cell multi-user multiple-input multiple-output transmission and coordinated multi point transmission, and heterogeneous networks with emphasis on Type 1 and Type 2 relays.
Journal ArticleDOI

On timing offset estimation for OFDM systems

TL;DR: Two timing offset estimation methods for orthogonal frequency division multiplexing (OFDM) systems as modifications to Schmidl and Cox's method are presented and both have significantly smaller estimator variance in both channel conditions.
Journal ArticleDOI

Blind estimation of symbol timing and carrier frequency offset in wireless OFDM systems

TL;DR: An algorithm for the blind estimation of symbol timing and carrier frequency offset in wireless OFDM systems is introduced and the use of different subcarrier transmit powers and periodic transmitter precoding to achieve a carrier frequency acquisition range of the entire bandwidth of the OFDM signal, and a symbol timing acquisitionrange of arbitrary length is proposed.