Random access retransmission scheme for power limited nodes

Nagasubramanian, Karthik and Pydi, Muni Sreenivas (2017) Random access retransmission scheme for power limited nodes. In: 23rd National Conference on Communications, NCC 2017, 02-04 March 2017, Chennai, India, pp. 1-6.

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Abstract

Conventional retransmission schemes for Random Access Channel (RACH) use a uniform random backoff for time of transmission (ToT). It is shown that if the mobile user equipment (UE) velocity and the carrier frequency are known, time-domain correlation statistics of the fading channel can be inferred and then utilized to adapt ToT. A joint metric that trades off between user fairness and opportunistic channel utilization is proposed, and an optimal backoff probability distribution function is derived for ToT. Through simulations, it is shown that by trading off with transmission delay, reduction in power and average number of retransmissions can be obtained.

Item Type:	Conference Paper
Publisher:	Institute of Electrical and Electronics Engineers Inc.
Additional Information:	The Copyright of this article belongs to the Institute of Electrical and Electronics Engineers Inc.
Keywords:	Backoff; Coherence time; Random access; Slotted ALOHA; Commerce; Distribution functions; Probability distributions; Backoff; Coherence time; Random access; Random access channel; Retransmission scheme; Slotted Aloha; Time of transmission; Time-domain correlation; Fading channels
Department/Centre:	Division of Electrical Sciences > Computer Science & Automation
Date Deposited:	13 Jun 2022 06:00
Last Modified:	13 Jun 2022 06:00
URI:	https://eprints.iisc.ac.in/id/eprint/73308

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