標題: r-Hint: A Message-Efficient Random Access Response for mMTC in 5G Networks
作者: Huang, Teng-Wei
Ren, Yi
Lin, Kate Ching-Ju
Tseng, Yu-Chee
資訊工程學系
Department of Computer Science
關鍵字: communication protocol;LTE-M;MTC;Random Access;5G
公開日期: 1-一月-2017
摘要: 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.
URI: http://hdl.handle.net/11536/147079
期刊: 2017 IEEE 28TH ANNUAL INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR, AND MOBILE RADIO COMMUNICATIONS (PIMRC)
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