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Distributed DL/UL asymmetry synchronization for adaptive-TDD wireless access networks

Lookup NU author(s): Dr Konstantinos Ntagkounakis, Professor Bayan Sharif


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Adaptive Time Division Duplex (ATDD) systems have the ability to efficiently utilize the radio spectrum and achieve higher capacity, when the traffic conditions are time-varying within a cell or diverse among different cells. However, severe co-channel interference conditions can occur when the movable TDD boundary is not synchronized amongst all frames in the base stations, compromising the spectral efficiency and the system's robust operation. To reduce the interference outage probability, a Distributed Boundary Synchronization (DBS) scheme is proposed that dynamically synchronizes the TDD boundaries amongst neighbouring sectors, thus avoiding sector-to-sector interference, whilst preserving the ATDD efficiency. Results show that DBS achieves an 8 dB improvement in the uplink SIR for the same interference outage, and a 27.5-60% increase in terms of capacity, subject to traffic asymmetry conditions. More importantly the proposed DBS scheme requires only simple modifications in the system. © 2006 IEEE.

Publication metadata

Author(s): Ntagkounakis K, Dallas P, Sharif B, Yovanof G

Publication type: Conference Proceedings (inc. Abstract)

Publication status: Published

Conference Name: 17th International Symposium on Personal, Indoor and Mobile Radio Communications

Year of Conference: 2006

Pages: 1-5

Publisher: IEEE


DOI: 10.1109/PIMRC.2006.254225

Library holdings: Search Newcastle University Library for this item

Series Title: IEEE Conference Proceedings

ISBN: 1424403294