DocumentCode :
3579634
Title :
Efficient LTE access with collision resolution for massive M2M communications
Author :
Madueno, German Corrales ; Stefanovic, Sedomir ; Popovski, Petar
Author_Institution :
Dept. of Electron. Syst., Aalborg Univ., Aalborg, Denmark
fYear :
2014
Firstpage :
1433
Lastpage :
1438
Abstract :
LTE random access procedure performs satisfactorily in case of asynchronous, uncorrelated traffic arrivals. However, when the arrivals are correlated and arrive synchronously, the performance of the random access channel (RACH) is drastically reduced, causing a large number of devices to experience outage. In this work we propose a LTE RACH scheme tailored for delay-sensitive M2M services with synchronous traffic arrivals. The key idea is, upon detection of a RACH overload, to apply a collision resolution algorithm based on splitting trees. The solution is implemented on top of the existing LTE RACH mechanism, requiring only minor modifications of the protocol operation and not incurring any changes to the physical layer. The results are very promising, outperforming the related solutions by a wide margin. As an illustration, the proposed scheme can resolve 30k devices with an average of 5 preamble transmissions and delay of 1.2 seconds, under a realistic probability of transmissions error both in the downlink and in the uplink.
Keywords :
Long Term Evolution; error statistics; protocols; telecommunication traffic; LTE RACH mechanism; LTE RACH scheme; LTE random access procedure; M2M communications; RACH overload; collision resolution; delay-sensitive M2M services; protocol operation; random access channel; splitting trees; synchronous traffic arrivals; transmission error probability; uncorrelated traffic arrivals; Delays; Dynamic scheduling; Performance evaluation; Reliability; Resource management; Standards; Uplink;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Globecom Workshops (GC Wkshps), 2014
Type :
conf
DOI :
10.1109/GLOCOMW.2014.7063635
Filename :
7063635
Link To Document :
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