Title
Highly Reliable Radio Access Scheme By Duplicate Transmissions Via Multiple Frequency Channels And Suppressed Useless Transmission Under Interference From Other Systems
Abstract
This paper proposes a novel radio access scheme that uses duplicated transmission via multiple frequency channels to achieve mission critical Internet of Things (IoT) services requiring highly reliable wireless communications; the interference constraints that yield the required reliability are revealed. To achieve mission critical IoT services by wireless communication, it is necessary to improve reliability in addition to satisfying the required transmission delay time. Reliability is defined as the packet arrival rate without exceeding the desired transmission delay time. Traffic of the own system and interference from the other systems using the same frequency channel such as unlicensed bands degrades the reliability. One solution is the frequency/time diversity technique. However, these techniques may not achieve the required reliability because of the time taken to achieve the correct reception. This paper proposes a novel scheme that transmits duplicate packets utilizing multiple wireless interfaces over multiple frequency channels. It also proposes a suppressed duplicate transmission (SDT) scheme, which prevents the wastage of radio resources. The proposed scheme achieves the same reliable performance as the conventional scheme but has higher tolerance against interference than retransmission. We evaluate the relationship between the reliability and the occupation time ratio where the interference occupation time ratio is defined as the usage ratio of the frequency resources occupied by the other systems. We reveal the upper bound of the interference occupation time ratio for each frequency channel, which is needed if channel selection control is to achieve the required reliability.
Year
DOI
Venue
2021
10.1587/transcom.2020EBP3046
IEICE TRANSACTIONS ON COMMUNICATIONS
Keywords
DocType
Volume
Internet of things (IoT), highly reliable wireless communication, duplicated transmission, multiple frequency channels, interference from the other systems, occupation time ratio
Journal
E104B
Issue
ISSN
Citations 
6
0916-8516
0
PageRank 
References 
Authors
0.34
0
5
Name
Order
Citations
PageRank
Hideya So101.35
Takafumi Fujita242.88
Kento Yoshizawa300.34
Maiko Naya400.34
Takashi Shimizu500.34