@inproceedings{cb8daf4639624680a8aaa4db30a0bc71,
title = "Random Access Schemes in Wireless Systems with Correlated User Activity",
abstract = "Traditional random access schemes are designed based on the aggregate process of user activation, which is created on the basis of independent activations of the users. However, in Machine-Type Communications (MTC), some users are likely to exhibit a high degree of correlation, e.g. because they observe the same physical phenomenon. This paves the way to devise access schemes that combine scheduling and random access, which is the topic of this work. The underlying idea is to schedule highly correlated users in such a way that their transmissions are less likely to result in a collision. To this end, we propose two greedy allocation algorithms. Both attempt to maximize the throughput using only pairwise correlations, but they rely on different assumptions about the higher-order dependencies. We show that both algorithms achieve higher throughput compared to the traditional random access schemes, suggesting that user correlation can be utilized effectively in access protocols for MTC.",
keywords = "machine-type communications, Random access protocols, scheduling, slotted ALOHA, wireless communication",
author = "Kal{\o}r, {Anders E.} and Hanna, {Osama A.} and Petar Popovski",
year = "2018",
month = aug,
day = "24",
doi = "10.1109/SPAWC.2018.8445866",
language = "English",
isbn = "978-1-5386-3513-1",
series = "IEEE International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)",
publisher = "IEEE",
booktitle = "2018 IEEE 19th International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2018",
address = "United States",
note = "19th IEEE International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2018 ; Conference date: 25-06-2018 Through 28-06-2018",
}