New relay-based transmission protocols for wireless distributed storage systems

Camilla Hollanti, Francis Lu, David Karpuk, Amaro Barreal

研究成果: Conference contribution同行評審

2 引文 斯高帕斯(Scopus)

摘要

Communication over a fading channel in a wireless storage system makes repair transmissions prone to physical layer errors. The repair transmission can be modeled as a multiple access channel (MAC), where multiple helpers are simultaneously communicating to the newcomer node. The existing optimal MAC space-time (ST) codes are, however, practically useless due to exponentially high decoding complexity when the number of helper nodes is big and the number of antennas at the newcomer node is low. To tackle this problem, two new repair transmission protocols based on ST-coding and relaying strategies are given in this paper. The diversity-multiplexing gain tradeoff (DMT) of the system together with sphere-decodability and low transmitter and receiver complexity in terms of the number of antennas required at each end are used as the main design criteria, thus naturally establishing a tradeoff between DMT, complexity, and the decoding delay. Both schemes are converting the MAC into a relay channel by increasing the decoding delay, which enables them to outperform the DMT of a simple time sharing protocol and the MAC DMT for certain multiplexing gains.

原文English
主出版物標題Proceedings of 2014 International Symposium on Information Theory and Its Applications, ISITA 2014
發行者Institute of Electrical and Electronics Engineers Inc.
頁面585-589
頁數5
ISBN(電子)9784885522925
出版狀態Published - 8 十二月 2014
事件2014 International Symposium on Information Theory and Its Applications, ISITA 2014 - Melbourne, Australia
持續時間: 26 十月 201429 十月 2014

出版系列

名字Proceedings of 2014 International Symposium on Information Theory and Its Applications, ISITA 2014

Conference

Conference2014 International Symposium on Information Theory and Its Applications, ISITA 2014
國家Australia
城市Melbourne
期間26/10/1429/10/14

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