Non-orthogonal direct access for small data transmission in cellular MTC networks

Keng Te Liao, Chia-Han Lee, Tzu Ming Lin, Chien Min Lee, Wen Tsuen Chen

研究成果: Conference contribution同行評審

3 引文 斯高帕斯(Scopus)

摘要

In conventional LTE networks, user equipments (UEs) access the network via a four-step random access procedure. When small amount of data is transmitted, such as in the scenarios of machine-type communications (MTC), signaling overhead resulted from the random access procedure becomes a critical issue. To enable an efficient small data transmission, a direct access scheme utilizing code division multiplexing (CDM) is proposed in this paper. Instead of transmitting on the resource blocks indicated by eNB, UEs randomly select resource blocks for direct data transmission without signaling eNB, with CDM used to resolve the collision problem. Under the proposed architecture, however, the data transmission is inherently non-orthogonal and the eNB has to detect the data without any information from UEs, making the receiver too complex to implement. To ease the burden of the receiver, we design a pseudo-random resource selection scheme such that the search space of the data detection is reduced. The analysis and simulation results show the advantage of using the proposed direct access scheme to improve the efficiency of small data transmission in cellular networks.

原文English
主出版物標題2015 IEEE International Conference on Communications, ICC 2015
發行者Institute of Electrical and Electronics Engineers Inc.
頁面2264-2270
頁數7
ISBN(電子)9781467364324
DOIs
出版狀態Published - 9 九月 2015
事件IEEE International Conference on Communications, ICC 2015 - London, United Kingdom
持續時間: 8 六月 201512 六月 2015

出版系列

名字IEEE International Conference on Communications
2015-September
ISSN(列印)1550-3607

Conference

ConferenceIEEE International Conference on Communications, ICC 2015
國家United Kingdom
城市London
期間8/06/1512/06/15

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