r-Hint: A message-efficient random access response for mMTC in 5G networks

Huang, Teng-Wei, Ren, Yi, Lin, Kate Ching-Ju and Tseng, Yu-Chee (2018) r-Hint: A message-efficient random access response for mMTC in 5G networks. In: Proc. IEEE 28th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC 2017). IEEE Press. ISBN 978-1-5386-3529-2

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Abstract

Massive Machine Type Communication (mMTC) has attracted increasing attention due to the explosive growth of IoT devices. Random Access (RA) for a large number of mMTC devices is especially difficult since the high signaling overhead between User Equipments (UEs) and an eNB may overwhelm the available spectrum resources. To address this issue, we propose “respond by hint” (r-Hint), an ID-free handshaking protocol for contention-based RA in mMTC. The core idea of r-Hint is to avoid sequentially notifying contending UEs of their IDs by broadcasting a hint in the RA Response (RAR). To do so, we exploit the concept of prime factorization and hashing to encode the hint such that UEs can extract their required information accordingly. Our simulation results show that r-Hint reduces the RAR message size by 20%–40%. Such reduction can be translated to around 50% improvement of spectrum efficiency in LTE-M.

Item Type: Book Section
Faculty \ School: Faculty of Science > School of Computing Sciences
Related URLs:
Depositing User: Pure Connector
Date Deposited: 14 Mar 2018 09:30
Last Modified: 22 Jul 2020 03:27
URI: https://ueaeprints.uea.ac.uk/id/eprint/66487
DOI: 10.1109/PIMRC.2017.8292268

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