Analysis of Two-Step Random Access Procedure for Cellular Ultra-Reliable Low Latency Communications
Due to the emergence of Internet of Things (IoTs), it can be expected that the bandwidth provided by cellular systems might be consumed up soon. Some applications of them are delay-sensitive such that it would be critical to guarantee random access (RA) delay less than a threshold. Since the existin...
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| Format: | Article |
| Language: | English |
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IEEE
2021-01-01
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| Series: | IEEE Access |
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| Online Access: | https://ieeexplore.ieee.org/document/9312185/ |
| _version_ | 1818449035849105408 |
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| author | Jun-Bae Seo Waqas Tariq Toor Hu Jin |
| author_facet | Jun-Bae Seo Waqas Tariq Toor Hu Jin |
| author_sort | Jun-Bae Seo |
| collection | DOAJ |
| description | Due to the emergence of Internet of Things (IoTs), it can be expected that the bandwidth provided by cellular systems might be consumed up soon. Some applications of them are delay-sensitive such that it would be critical to guarantee random access (RA) delay less than a threshold. Since the existing Long-Term Evolution-Advanced (LTE-A) RA procedure is a four-step signaling procedure, it may not be suitable for such delay-sensitive applications due to its time-consuming procedure. This work investigates a two-step RA procedure for 5G New Radio systems, where RA preamble and bandwidth request message are transmitted at the same time. First we show that the operating region of two-step RA procedure can be divided into three regions such as unsaturated stable, bistable, and saturated regions in terms of a packet generation probability, retransmission probability, the number of devices, and the number of RA preambles. To see whether RA delay requirement of delay-sensitive applications can be guaranteed, this work shows that the system should run under unsaturated region and derives RA delay distribution when IoT devices employ geometric probability backoff (GPB) or uniform window backoff (UWB) algorithm. We then examine the probability that the RA delay would be larger than some threshold depending on the operation regions. |
| first_indexed | 2024-12-14T20:29:01Z |
| format | Article |
| id | doaj.art-7485c4d41cc041fe8312f2c282e31019 |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-12-14T20:29:01Z |
| publishDate | 2021-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-7485c4d41cc041fe8312f2c282e310192022-12-21T22:48:35ZengIEEEIEEE Access2169-35362021-01-0195972598510.1109/ACCESS.2020.30488249312185Analysis of Two-Step Random Access Procedure for Cellular Ultra-Reliable Low Latency CommunicationsJun-Bae Seo0Waqas Tariq Toor1https://orcid.org/0000-0003-0223-2019Hu Jin2https://orcid.org/0000-0002-3505-6843Department of Information and Communication Engineering, Gyeongsang National University, Tongyeong, Republic of KoreaDepartment of Electrical Engineering, Khwaja Fareed University of Engineering and Information Technology, Rahim Yar Khan, PakistanDivision of Electrical Engineering, Hanyang University, Ansan, Republic of KoreaDue to the emergence of Internet of Things (IoTs), it can be expected that the bandwidth provided by cellular systems might be consumed up soon. Some applications of them are delay-sensitive such that it would be critical to guarantee random access (RA) delay less than a threshold. Since the existing Long-Term Evolution-Advanced (LTE-A) RA procedure is a four-step signaling procedure, it may not be suitable for such delay-sensitive applications due to its time-consuming procedure. This work investigates a two-step RA procedure for 5G New Radio systems, where RA preamble and bandwidth request message are transmitted at the same time. First we show that the operating region of two-step RA procedure can be divided into three regions such as unsaturated stable, bistable, and saturated regions in terms of a packet generation probability, retransmission probability, the number of devices, and the number of RA preambles. To see whether RA delay requirement of delay-sensitive applications can be guaranteed, this work shows that the system should run under unsaturated region and derives RA delay distribution when IoT devices employ geometric probability backoff (GPB) or uniform window backoff (UWB) algorithm. We then examine the probability that the RA delay would be larger than some threshold depending on the operation regions.https://ieeexplore.ieee.org/document/9312185/Random access procedureURLLC5Glong-term evolution advanced |
| spellingShingle | Jun-Bae Seo Waqas Tariq Toor Hu Jin Analysis of Two-Step Random Access Procedure for Cellular Ultra-Reliable Low Latency Communications IEEE Access Random access procedure URLLC 5G long-term evolution advanced |
| title | Analysis of Two-Step Random Access Procedure for Cellular Ultra-Reliable Low Latency Communications |
| title_full | Analysis of Two-Step Random Access Procedure for Cellular Ultra-Reliable Low Latency Communications |
| title_fullStr | Analysis of Two-Step Random Access Procedure for Cellular Ultra-Reliable Low Latency Communications |
| title_full_unstemmed | Analysis of Two-Step Random Access Procedure for Cellular Ultra-Reliable Low Latency Communications |
| title_short | Analysis of Two-Step Random Access Procedure for Cellular Ultra-Reliable Low Latency Communications |
| title_sort | analysis of two step random access procedure for cellular ultra reliable low latency communications |
| topic | Random access procedure URLLC 5G long-term evolution advanced |
| url | https://ieeexplore.ieee.org/document/9312185/ |
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