Semi-Grant-Free Non-Orthogonal Multiple Access for Tactile Internet of Things

Pliatsios, Dimitrios; Boulogeorgos, Alexandros–Apostolos A.; Λάγκας, Θωμάς; Argyriou, Vasileios; Moscholios, Ioannis D.; Sarigiannidis, Panagiotis

doi:10.1109/pimrc50174.2021.9569640

Cited by 11 publications

(5 citation statements)

References 23 publications

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“…Due to the limited energy reserves, the position and transmission power of the UAVs have to be carefully specified [20], [21]. Furthermore, schemes that facilitate the accommodation of massives numbers of IoT devices can be leveraged [22], [23]. Finally, we aim to investigate the concurrent use of both FSO and RF transceivers to upload a device task.…”

Section: Discussionmentioning

confidence: 99%

A Hybrid RF-FSO Offloading Scheme for Autonomous Industrial Internet of Things

Pliatsios

Λάγκας

Argyriou

et al. 2022

IEEE INFOCOM 2022 - IEEE Conference on Computer Communications Workshops (INFOCOM WKSHPS)

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The ever increasing demand for bandwidth triggered by data-intensive applications is imposing a considerable burden on the radio-frequency (RF) spectrum. A promising solution to address the spectrum congestion problem is the adoption of free-space optical (FSO) communications. In this work, we consider a hybrid RF-FSO system that enables the task offloading process from Industrial Internet-of-Things devices to a multi-access edge computing (MEC)-enabled base station (BS). We propose a solution that minimizes the total energy consumption of the system by deciding whether the RF or FSO link will be used for the task offloading and optimally allocating the device transmission power while taking into account the task requirements in terms of delay. The proposed solution is based on a decomposition-driven algorithm that employs integer linear programming (ILP) and Lagrange dual decomposition. Finally, we carry out system-level Monte Carlo simulations to evaluate the performance of the solution. The simulation results show that the proposed solution can minimize the total energy consumption within a few iterations, while also considering the respective latency requirements.

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Section: Discussionmentioning

confidence: 99%

A Hybrid RF-FSO Offloading Scheme for Autonomous Industrial Internet of Things

Pliatsios

Λάγκας

Argyriou

et al. 2022

IEEE INFOCOM 2022 - IEEE Conference on Computer Communications Workshops (INFOCOM WKSHPS)

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“…Different resource allocation algorithms can be utilized, based on the aim of the allocation policy (e.g., minimizing the total energy consumption, maximizing spectral and/or energy efficiency, maximizing system fairness, maximizing the total system throughput, etc.) [48], [49].…”

Section: B Protocol Descriptionmentioning

confidence: 99%

A Priority-Based Semi-Grant-Free NOMA: Protocol Design and Performance Analysis

Pliatsios,

Boulogeorgos,

Angelidis

et al. 2024

IEEE Trans. on Green Commun. Netw.

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This paper introduces a novel semi-grant-free nonorthogonal multiple access protocol that ensures reliable massive connectivity of both scheduled and random access devices of diverse data rate (DR) requirements while tripling the network's capacity. In more detail, the protocol classifies the devices into two categories, namely primary and secondary. Primary devices (PDs) require high-data-rate scheduled or random access with hightransmission probability, and are one-third of the total number of devices, while, the rest, are classified as secondary devices (SDs) and have low-DR requirements as well as access the network in a random fashion. The base-station generates a number of radio resource blocks (RRBs) that is equal to the number of PDs and allocates a primary and two SDs in each RRB. The allocation is based on the requested DRs of the primary and SDs as well as on the transmission probability of the SDs. To prove the feasibility and efficiency of the presented protocol, we conduct a performance analysis that results in the extraction of novel and insightful closed-form expressions for the outage probability and achieved throughput for all devices.

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“…In [37], a downlink collided-preamble feedback was applied to facilitate massive multiple-input multiple-output assisted SGF random access. For tactile IoT networks that use NOMA-SGF transmissions, joint power allocation and sub-channel assignment were investigated in [38]. In [39], a user barring scheme was proposed to increase the average arrival rate for the NOMA-SGF transmission system taking into account multiple transmit power levels.…”

Section: A Related Workmentioning

confidence: 99%

Outage Performance Analysis of RSMA-Aided Semi-Grant-Free Transmission Systems

Xiao

Yang

et al. 2023

IEEE Open J. Commun. Soc.

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In this paper, we analyze the outage performance of a rate-splitting multiple access (RSMA)aided semi-grant-free (SGF) transmission system, in which a grant-based user (GBU) and multiple grantfree users (GFUs) access the base station by sharing the same resource blocks. In the RSMA-aided SGF (RSMA-SGF) transmission system, the GBU and admitted GFU are respectively treated as the primary and secondary users by using the cognitive radio principle. With the aid of RSMA, the admitted GFU's transmit power allocation, target rate allocation, and successive interference cancellation decoding order are jointly optimized to attain the maximum achievable rate for the admitted GFU, without deteriorating the GBU's outage performance compared to orthogonal multiple access. Taking into account the extended non-outage zone achieved by rate-splitting, a closed-form expression is derived for the outage probability of the admitted GFU in the considered RSMA-SGF system. Asymptotic analysis for the admitted GFU's outage probability is also provided. The superior outage performance and full multiuser diversity gain achieved by the RSMA-SGF transmission system are verified by the analytical and simulation results.INDEX TERMS Grant-free transmissions, multiple access, outage probability, rate-splitting.

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Semi-Grant-Free Non-Orthogonal Multiple Access for Tactile Internet of Things

Cited by 11 publications

References 23 publications

A Hybrid RF-FSO Offloading Scheme for Autonomous Industrial Internet of Things

A Hybrid RF-FSO Offloading Scheme for Autonomous Industrial Internet of Things

A Priority-Based Semi-Grant-Free NOMA: Protocol Design and Performance Analysis

Outage Performance Analysis of RSMA-Aided Semi-Grant-Free Transmission Systems

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