Sidelink-Assisted URLLC Built on Cooperative Retransmissions With Optimum Power Control

Soni, Tapisha; Schellmann, Malte; Knoll, Alois

doi:10.1109/pimrc50174.2021.9569334

Cited by 2 publications

(7 citation statements)

References 12 publications

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“…Our previous work on user cooperation [15] serves as the baseline, in which we analytically investigated and proved the importance of cooperation from neighbors in improving the reliability performance. Recently, in our previous study [23], we examined useful PC mechanisms and tailored an optimal PC scheme for CoRe considering typical densely populated applications such as V2X and IIoT, where the conventional D2D channel model and hexagonal topology in a macro-cell setup is assumed. Hence, extending our research on cooperative retransmissions, this work has been motivated from the growing demand and challenges of industrial automation use cases in the context of factory automation with large factory hall settings.…”

Section: A Contributionsmentioning

confidence: 99%

“…Furthermore, when considering SL-assisted CoRe, the transmit PC has been shown to be one of the key features beneficial to further reduce the interference that may be imposed on the system if multiple D2D UEs are simultaneously transmitting [23]. The UE transmit power should be allocated depending on the path-loss of the assisting UE to the target UE [18], to allow for a balanced user contribution when multiple users cooperate.…”

Section: Interference Management and Power Controlmentioning

confidence: 99%

“…The UE transmit power should be allocated depending on the path-loss of the assisting UE to the target UE [18], to allow for a balanced user contribution when multiple users cooperate. As our investigation in [23] has shown promising reductions in the D2D transmit power in macro-cell deployments, we are now interested in studying its potential impact and benefits in an industrial factory scenario with a squared TRP deployment. In our SL-assisted CoRe scheme, retransmissions are carried out by amplify/equalize and forward, reusing the same modulation and coding scheme (MCS) determined for the first DL transmission.…”

Section: Interference Management and Power Controlmentioning

confidence: 99%

“…As previously described, the assumption of independent fading also holds for Ricean channels with a moderate K-factor. It was shown in [23] that Rayleigh fading can be used as a worst-case assumption, providing an upper bound for PC estimation.…”

Section: Optimal Power Allocation Algorithmmentioning

confidence: 99%

“…Dosti et al [22] have proposed an optimal PC algorithm considering point-to-point URLLC transmissions, where the power is incremented gradually with consecutive HARQ retransmissions to attain the maximum outage probability after the n th retransmission. We conducted a detailed investigation of PC schemes and extended the optimal PC algorithm from [22] for the CoRe via sidelink (SL), which shows significant power savings possible by these means [23].…”

Section: Introductionmentioning

confidence: 99%

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Flipped-Underlay in Power-Efficient Industrial IoT Sidelink-Assisted Communication

Soni,

Schellmann,

Knoll

2023

IEEE Access

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Future factories will rely on highly reliable wireless communication among the plenty of devices and the network. The 5G networks enable ultra-reliable low-latency communication (URLLC) service to address the reliability and latency requirements in factories, where device-to-device (D2D) connections can provide additional means for improving communication reliability. To this aim, we have proposed a sidelink (SL)-assisted cooperative retransmissions (CoRe) scheme in our previous work, where retransmissions via SL for unsuccessful downlink (DL) transmissions are used to improve communication reliability under strict latency constraints. In this paper, we evaluate the CoRe scheme for a realistic factory scenario using system-level simulations, where we consider interference coordination and an optimal power control (PC) scheme. Inspired by the outcome of small transmit powers needed for the SL-assisted retransmissions, we propose a novel resource management scheme named "flipped-underlay", which is realized by underlay communication. While in conventional underlay, a D2D communication with small transmit power is assigned to resources already allocated for uplink (UL) communication and thus underlaid, the D2D resources are allocated firstly in our scheme, and hence called flipped-underlay. Results demonstrate that the gains from CoRe scheme, are three-fold: showing a significant reduction in the total number of SL-assisted retransmissions compared to conventional retransmissions via DL while maintaining the desired reliability and latency performance, reduced transmit power consumption by virtue of the optimal power allocation for retransmissions, and finally yet importantly, reuse of resources in our new flipped-underlay resource allocation (FURA) algorithm substantially reduces the total amount of resources occupied by the system.

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Section: A Contributionsmentioning

confidence: 99%

Section: Interference Management and Power Controlmentioning

confidence: 99%

Section: Interference Management and Power Controlmentioning

confidence: 99%

Section: Optimal Power Allocation Algorithmmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Flipped-Underlay in Power-Efficient Industrial IoT Sidelink-Assisted Communication

Soni,

Schellmann,

Knoll

2023

IEEE Access

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Adaptive Sidelink Open Loop Power Control Optimization Strategies for Vehicle-to- Vehicle Communications in 5G-NR-V2X

Jiawei,

Pawase,

Chang

2024

IEEE Access

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In the rapidly evolving landscape of 5G-NR-V2X communication systems, the demand for efficient and adaptive power control mechanisms is paramount to address the challenges posed by highdensity vehicular environments. This paper introduces the adaptive sidelink open loop power control (AS-OLPC) algorithm as a pioneering solution. The primary objective is to enhance vehicle-to-vehicle (V2V) communication reliability through real-time signal-to-interference-plus-noise ratio (SINR) estimation, interference level measurements, and dynamic power adjustments. The main problem addressed in this research is the need for improved communication throughput in complex urban scenarios. Our specific objectives involve the development and evaluation of AS-OLPC against conventional open loop power control (OLPC) algorithms. To assess the algorithm's effectiveness, an extensive simulation setup replicates realistic urban and highway scenarios. Key metrics such as packet reception ratio (PRR), interference levels, and energy efficiency are employed for analysis. The results showcase the adaptability and superior performance of AS-OLPC, establishing it as a promising solution for optimizing communication throughput in 5G-NR-V2X networks.INDEX TERMS 5G-NR-V2X, vehicle-to-everything (V2X), sidelink communications, C-V2X services, vehicle-to-vehicle communication, Open Loop Power Control (OLPC).

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Sidelink-Assisted URLLC Built on Cooperative Retransmissions With Optimum Power Control

Cited by 2 publications

References 12 publications

Flipped-Underlay in Power-Efficient Industrial IoT Sidelink-Assisted Communication

Flipped-Underlay in Power-Efficient Industrial IoT Sidelink-Assisted Communication

Adaptive Sidelink Open Loop Power Control Optimization Strategies for Vehicle-to- Vehicle Communications in 5G-NR-V2X

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