2014/10/24 by Germán Corrales Madueño, Madueño, Germán Corrales, Čedomir Stefanović +3 · 1 citation
Engineering · #Advanced MIMO Systems Optimization #Advanced Wireless Communication Technologies #Energy Harvesting in Wireless Networks #FOS: Computer and information sciences #Information Theory (cs.IT) #IoT Networks and Protocols #Networking and Internet Architecture (cs.NI) #Wireless Body Area Networks
paper · pdf · doi:10.48550/arxiv.1410.6628
openalex publication_date 2014/10/24 · openalex created_date 2022/10/03 · openalex updated_date 2026/07/28
LTE random access procedure performs satisfactorily in case of asynchronous,\nuncorrelated traffic arrivals. However, when the arrivals are correlated and\narrive synchronously, the performance of the random access channel (RACH) is\ndrastically reduced, causing a large number of devices to experience outage. In\nthis work we propose a LTE RACH scheme tailored for delay-sensitive M2M\nservices with synchronous traffic arrivals. The key idea is, upon detection of\na RACH overload, to apply a collision resolution algorithm based on splitting\ntrees. The solution is implemented on top of the existing LTE RACH mechanism,\nrequiring only minor modifications of the protocol operation and not incurring\nany changes to the physical layer. The results are very promising,\noutperforming the related solutions by a wide margin. As an illustration, the\nproposed scheme can resolve 30k devices with an average of 5 preamble\ntransmissions and delay of 1.2 seconds, under a realistic probability of\ntransmissions error both in the downlink and in the uplink.\n