Irregular Repetition ALOHA with Packet Length Diversity

Akyildiz, Talha; Duman, Tolga M.

doi:10.1109/globecom38437.2019.9014257

2019 IEEE Global Communications Conference (GLOBECOM) 2019

DOI: 10.1109/globecom38437.2019.9014257

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Irregular Repetition ALOHA with Packet Length Diversity

Talha Akyildiz

Tolga M. Duman

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2021

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“…In [26], ECRA with different combining techniques is proposed, and an approximate performance bound for low channel loads coupled with simulation results is given. IRA with packet length diversity (IRA-PLD) is proposed in [27], which allows users to transmit their packets with varying durations as a source of further diversity in addition to the time diversity obtained via repetition of packets.…”

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Energy Harvesting Irregular Repetition ALOHA With Replica Concatenation

Akyildiz

Demirhan

Duman

2021

IEEE Trans. Wireless Commun.

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In this paper, we consider an asynchronous random access scheme called irregular repetition ALOHA (IRA) as a generalization of contention resolution ALOHA (CRA) with varying repetitions. We present an asymptotic performance analysis of CRA and IRA on the collision channel for regular and irregular repetition rates. We also propose an improvement by merging the clean parts of packet replicas in partial collisions, and extend our analysis to this scenario as well. Specific designs of repetition distributions based on the new analysis show that the optimized solutions of irregular repetition slotted ALOHA (IRSA) perform well in both IRA and the enhanced scheme, and they considerably outperform the regular repetition distributions. We also introduce energy harvesting (EH) to both schemes as a practical and sustainable adaptation, where users are able to harvest energy and store it in their finite-capacity batteries. We model the battery state by a discrete-time Markov chain and derive an optimal transmission policy to maximize the asymptotic performance of the system. We provide comprehensive numerical results for both practical and asymptotic scenarios to verify the validity of the proposed analyses, and illustrate the benefits of the proposed systems.

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Energy Harvesting Irregular Repetition ALOHA With Replica Concatenation

Akyildiz

Demirhan

Duman

2021

IEEE Trans. Wireless Commun.

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Irregular Repetition ALOHA with Packet Length Diversity

Cited by 1 publication

References 18 publications

Energy Harvesting Irregular Repetition ALOHA With Replica Concatenation

Energy Harvesting Irregular Repetition ALOHA With Replica Concatenation

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