TY - GEN
T1 - Efficient LTE Access with Collision Resolution for Massive M2M Communications
AU - Madueño, Germán Corrales
AU - Stefanovic, Cedomir
AU - Popovski, Petar
PY - 2014
Y1 - 2014
N2 - 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.
AB - 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.
U2 - 10.1109/GLOCOMW.2014.7063635
DO - 10.1109/GLOCOMW.2014.7063635
M3 - Article in proceeding
T3 - GLOBECOM - conference record / IEEE Global Telecommunications Conference
SP - 1433
EP - 1438
BT - Proceedings of the 2014 IEEE Global Communications Conference (GLOBECOM)
PB - IEEE Communications Society
T2 - Globecom 2014
Y2 - 8 December 2014 through 12 December 2014
ER -