ePrints@IIScePrints@IISc Home | About | Browse | Latest Additions | Advanced Search | Contact | Help

On the Improved Memory Utilization in HARQ Pooling

Vankayala, SK and Ashok Krishnan, KS and Gundeti, RT and Gautam Shenoy, K (2020) On the Improved Memory Utilization in HARQ Pooling. In: SPCOM 2020 - International Conference on Signal Processing and Communications, 19 - 24 July 2020, Bangalore.

[img] PDF
spcom_ 2020.pdf - Published Version
Restricted to Registered users only

Download (264kB) | Request a copy
Official URL: https://doi.org/10.1109/SPCOM50965.2020.9179580


We consider a novel mechanism to pool HARQ (Hybrid Automatic Repeat Request) memory at the UE (User Equipment). In legacy systems, each carrier is allocated a separate section of the total HARQ memory. By pooling this memory and allocating as HARQ requests arrive, we significantly improve the memory utilization. Moreover, we can accommodate a larger fraction of arriving HARQ requests thus increasing HARQ throughput without increasing buffer requirement at the UE. In this work, we model the HARQ memory system as a multiserver queue, and obtain expressions for dropping probability and memory occupancy. We compare the pooling system to the legacy technology in an asymptotic regime, which is a good approximation in cases where the ratio of the largest to smallest packet size is large. This regime holds for scenarios with large Transport Block sizes, such as 5G New Radio. In this regime, under large load factor, we show that blocking probability reduces under the pooling mechanism and uses less resources. © 2020 IEEE.

Item Type: Conference Paper
Publication: SPCOM 2020 - International Conference on Signal Processing and Communications
Publisher: Institute of Electrical and Electronics Engineers Inc.
Additional Information: The copyright for this article belongs to Institute of Electrical and Electronics Engineers Inc.
Keywords: 5G mobile communication systems; Blocking probability; Error correction; Legacy systems; Memory architecture; Telecommunication services, Asymptotic regimes; Buffer requirements; Dropping probability; Hybrid automatic repeat request; Legacy technologies; Memory utilization; Multi-server queue; Transport block size, Signal processing
Department/Centre: Division of Interdisciplinary Sciences > Robert Bosch Centre for Cyber Physical Systems
Date Deposited: 06 Feb 2023 06:28
Last Modified: 06 Feb 2023 06:28
URI: https://eprints.iisc.ac.in/id/eprint/79848

Actions (login required)

View Item View Item