논문 해외 국제전문학술지(SCI급) An Enhanced Random Access With Preamble-Assisted Short-Packet Transmissions for Cellular IoT Communications
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2019-06
- 저자명 방인규
- 학술지명 IEEE COMMUNICATIONS LETTERS
- 발행처명 IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- 발행국가 해외
- 논문언어 외국어
- 전체저자수 2
홈페이지논문 초록 (Abstract)
We propose an enhanced random access ( RA) with preamble-assisted short-packet transmissions to support cellular Internet-of-Things (IoT) communications. A key feature of the proposed scheme is that the base station (e.g., eNodeB in LTE networks) utilizes the RA preambles as uplink reference signals to estimate uplink channel state information of IoT devices, which subsequently provides additional opportunities to transmit short packets during the RA procedure without extra signaling (e.g., connection and scheduling requests). Through simulations, we evaluate the performance of the proposed scheme in terms of a channel estimation mean squared error, a bit error rate, a preamble collision probability, and a success probability of short-packet transmissions. Results show that the proposed scheme can support reliable and low-latency featured short-packet transmissions during the RA procedure by efficiently incorporating both multiple antenna and detection techniques.