A High Throughput Pilot Allocation for M2M Communication in Crowded Massive MIMO Systems

A new scheme to resolve the intra-cell pilot collision for machine-to-machine (M2M) communication in crowded massive multiple-input multiple-output (MIMO) systems is proposed. The proposed scheme permits those failed user equipments (UEs), judged by a strongest-user collision resolution (SUCR) proto...

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Bibliographic Details
Published in:IEEE transactions on vehicular technology 2017-10, Vol.66 (10), p.9572-9576
Main Authors: Han, Huimei, Guo, Xudong, Li, Ying
Format: Article
Language:English
Subjects:
Computer simulation
machine-to-machine (M2M) communication
Machine-to-machine communications
Massive multiple-input multiple-output (MIMO) systems
MIMO
MIMO (control systems)
Partial transmit sequences
Payloads
pilot allocation
pilot collision
Pilots
Protocols
Random access
Resource management
Throughput
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Summary:A new scheme to resolve the intra-cell pilot collision for machine-to-machine (M2M) communication in crowded massive multiple-input multiple-output (MIMO) systems is proposed. The proposed scheme permits those failed user equipments (UEs), judged by a strongest-user collision resolution (SUCR) protocol, to contend for the idle pilots, i.e., the pilots that are not selected by any UE in the initial step. This scheme is called as SUCR combined idle pilots access (SUCR-IPA). To analyze the performance of the SUCR-IPA scheme, we develop a simple method to compute the access success probability of the UEs in each random access slot. The simulation results coincide well with the analysis. It is also shown that, compared with the SUCR protocol, the proposed SUCR-IPA scheme increases the throughput of the system significantly, and thus decreases the number of access attempts dramatically.
ISSN:0018-9545
1939-9359
DOI:10.1109/TVT.2017.2702604