Open AccessA novel random access scheme for M2M communication in crowded asynchronous massive MIMO systems
Author(s) -
Han Huimei,
Zhai Wenchao,
Li Ying,
Lu Weidang,
Zhao Jun
Publication year - 2021
Publication title -
iet communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.355
H-Index - 62
eISSN - 1751-8636
pISSN - 1751-8628
DOI - 10.1049/cmu2.12172
Subject(s) - asynchronous communication , telecommunications link , computer science , random access , mimo , throughput , real time computing , scheme (mathematics) , transmission (telecommunications) , user equipment , computer network , algorithm , base station , wireless , telecommunications , mathematics , channel (broadcasting) , mathematical analysis
A new random access scheme is proposed to solve the intra‐cell pilot collision for M2M communication in crowded asynchronous massive multiple‐input multiple‐output systems. The proposed scheme utilizes the proposed estimation method of signal parameters to estimate the effective timing offsets, and then active user equipments obtain their timing errors from the effective timing offsets for uplink message transmission. The mean squared error of the estimated effective timing offsets of user equipments and the uplink throughput are analysed. Simulation results show that, compared to the exiting random access scheme for the crowded asynchronous massive multiple‐input multiple‐output systems, the proposed scheme can improve the uplink throughput and estimate the effective timing offsets accurately at the same time.