Contention-Based Access for Ultra-Reliable Low Latency Uplink Transmissions

Bikramjit Singh, Olav Tirkkonen, Zexian Li, Mikko Uusitalo

Research output: Contribution to journalArticleScientificpeer-review

112 Citations (Scopus)
283 Downloads (Pure)


We consider sporadic ultra-reliable and low latency communications in the uplink 5G cellular systems. Reliable low latency access for randomly emerging packet transmission needs cannot be guaranteed in current wireless systems. To achieve the goal of low latency and high reliability simultaneously, we propose a contention-based transmission scheme aimed for the users with small payloads. We target to reduce collision probability by considering multiple transmissions for the same packet for reliable reception. We find the optimal number of consecutive multiple transmissions that reduces collisions and achieves target reliability within the latency window. By means of intended frame structure design for the 5G cellular systems, results are drawn and comparisons are made with default multi-channel slotted ALOHA access scheme.
Original languageEnglish
Pages (from-to)182 - 185
Number of pages4
Issue number2
Early online dateOct 2017
Publication statusPublished - Apr 2018
MoE publication typeA1 Journal article-refereed


Dive into the research topics of 'Contention-Based Access for Ultra-Reliable Low Latency Uplink Transmissions'. Together they form a unique fingerprint.

Cite this