NDLI: A Cell Identification Performance Improvement in Co-Channel Heterogeneous Cellular Networks with Cell Range Expansion

Content Provider	IEEE Xplore Digital Library
Author	Mikami, M. Miyashita, M. Yoshino, H.
Copyright Year	2015
Description	Author affiliation: R&D Devision, Softbank Mobile Corp., Tokyo, Japan (Mikami, M.; Miyashita, M.; Yoshino, H.)
Abstract	Recently, data traffic has been explosively increasing in cellular mobile communication systems due to the prevalence of smart phones. A co-channel heterogeneous cellular network overlaid with pico-cells (HetNet), in which pico-cell base stations (BSs) with low transmission power are placed at the hot spot area of a macro-cell base station with a high transmission power, has been receiving attention in order to deal with the increasing traffic. In general cellular mobile communication systems, synchronization signal (SS) symbols for the initial serving-cell identification and for the neighboring-cell identification at user equipments (UEs) are periodically transmitted from base stations (BSs). For HetNet, Cell Range Expansion (CRE), in which a bias value is used for the reference signal received power from pico-cell BSs, has been investigated as a promising approach to offload the traffic into the pico-cell from the macro- cell. Unfortunately, there is an issue that the cell identification delay at pico-cell area increases with the CRE bias value, since larger CRE bias value suffers from larger interference from macro-cell base stations (Macro-BSs) at the received SS symbols transmitted from pico-cell base stations (Pico-BSs) in the pico-cell area expanded by CRE. This paper investigates the cell- identification performance improvement possible with transmission power coordination of the SS symbols for HetNet with CRE. Then, it evaluates the cell-identification characteristics of a cell search operation based on the hierarchical SS structure of 3GPP LTE/LTE-Advanced, and also clarifies the effectiveness of the transmission power coordination of the SS symbols in terms of the pico-cell identification for HetNet with CRE.
Starting Page	1
Ending Page	5
File Size	410023
Page Count	5
File Format	PDF
ISBN	9781479980888
DOI	10.1109/VTCSpring.2015.7145590
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-05-11
Publisher Place	UK
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Boosting OFDM Synchronization Base stations Long Term Evolution Time-frequency analysis Transmitting antennas
Content Type	Text
Resource Type	Article

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