Cooperative Transmission Scheme Using Transmission Timing Control in LTE Enterprise Femtocell Networks

Seung-Yeon KIM  Sang-Sik AHN  Seungwan RYU  Choong-Ho CHO  Hyong-Woo LEE  

IEICE TRANSACTIONS on Communications   Vol.E95-B    No.3    pp.987-990
Publication Date: 2012/03/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E95.B.987
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Transmission Systems and Transmission Equipment for Communications
enterprise femtocell,  cooperative transmission,  transmission timing control,  conditional Gaussian distribution,  outage probability,  

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In this letter, we propose and analyze a cooperative transmission scheme (CTS) that uses transmission timing control for LTE enterprise femtocells. In our scheme, the user equipment (UE) can receive the desired signal from an adjacent fBS as well as its serving femtocell BS (fBS). Thus, UE achieves an improved signal to interference ratio (SIR) due to the synchronization of the two signals. Analysis and simulation results show that the proposed scheme can reduce the outage probability for enterprise femtocells compared to the conventional system. In particular, a significant performance improvement can be achieved for UEs located at cell edges.