Packet Duplication for URLLC in 5G: Architectural Enhancements and Performance Analysis

Rao, Jaya; Vrzic, Sophie

doi:10.1109/mnet.2018.1700227

Cited by 90 publications

(53 citation statements)

References 5 publications

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“…15 specifies use of Packet Duplication for URLLC services, where two independent transmission paths, from two different BSs, are used simultaneously to increase reliability and lower latency. Due to the involvement of multiple BSs, packet duplication requires modifications in the network architecture [68], [69]. Packet Duplication can be achieved both through Dual Connectivity and Carrier Aggregation, which are compared in [68].…”

Section: Related Workmentioning

confidence: 99%

Wireless Access in Ultra-Reliable Low-Latency Communication (URLLC)

Popovski

Stefanović

Nielsen

et al. 2019

IEEE Trans. Commun.

371

216

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The future connectivity landscape and, notably, the 5G wireless systems will feature Ultra-Reliable Low Latency Communication (URLLC). The coupling of high reliability and low latency requirements in URLLC use cases makes the wireless access design very challenging, in terms of both the protocol design and of the associated transmission techniques. This paper aims to provide a broad perspective on the fundamental tradeoffs in URLLC as well as the principles used in building access protocols. Two specific technologies are considered in the context of URLLC: massive MIMO and multi-connectivity, also termed interface diversity. The paper also touches upon the important question of the proper statistical methodology for designing and assessing extremely high reliability levels.

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Section: Related Workmentioning

confidence: 99%

Wireless Access in Ultra-Reliable Low-Latency Communication (URLLC)

Popovski

Stefanović

Nielsen

et al. 2019

IEEE Trans. Commun.

371

216

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“…Furthermore, system-level packet duplication (PD) with the dual connectivity architecture in the 5G new radio (NR) [20], where users are simultaneously connected to a primary and secondary cell, is envisioned to offer great reliability levels to address such URLLC outage requirements. However, in order not to excessively consume the radio resources by redundant packets, the benefit of the URLLC PD is relevant to specific scenarios, where channels are highly unfavorable.…”

Section: A State Of the Art Urllc Scheduling Studiesmentioning

confidence: 99%

Opportunistic Spatial Preemptive Scheduling for URLLC and eMBB Coexistence in Multi-User 5G Networks

Esswie

Pedersen

2018

IEEE Access

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The fifth generation (5G) of the mobile networks is envisioned to feature two major service classes: ultra-reliable low-latency communications (URLLC) and enhanced mobile broadband (eMBB). URLLC applications require a stringent one-way radio latency of 1 ms with 99.999% success probability while eMBB services demand extreme data rates. The coexistence of the URLLC and eMBB quality of service (QoS) on the same radio spectrum leads to a challenging scheduling optimization problem, that is vastly different from that of the current cellular technology. This calls for the novel scheduling solutions which cross-optimize the system performance on a user-centric, instead of network-centric basis. In this paper, a null-space-based spatial preemptive scheduler for joint URLLC and eMBB traffic is proposed for the densely populated 5G networks. Proposed scheduler framework seeks for cross-objective optimization, where the critical URLLC QoS is guaranteed while extracting the maximum possible eMBB ergodic capacity. It utilizes the system spatial degrees of freedom in order to instantly offer an interference-free subspace for the critical URLLC traffic. Thus, a sufficient URLLC decoding ability is always preserved, and with the minimal impact on the eMBB performance. Analytical analysis and extensive system level simulations are conducted to evaluate the performance of the proposed scheduler against the state-of-the-art scheduler proposals from industry and academia. Simulation results show that the proposed scheduler offers extremely robust URLLC latency performance with a significantly improved ergodic capacity.INDEX TERMS 5G, radio resource management, scheduling, ultra-reliable low-latency communications (URLLC), enhanced mobile broadband (eMBB), MU-MIMO, preemptive, null space.

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“…In URLLC context, the recent literature has studied the performance of multi-connectivity with packet duplication either to enhance reliability or to improve other network parameters such as required transmit power, link utilization and network power consumption for a specific reliability requirement (e.g., [4], [6]). The idea is to transmit multiple instances of a packet over multiple links.…”

Section: Introductionmentioning

confidence: 99%

“…The idea is to transmit multiple instances of a packet over multiple links. For instance, [6] shows that the use of packet duplication can, in certain scenarios, lead to an improvement of resource utilization in terms of the number of used physical resource blocks. However, the supporting analysis is conducted under the assumption of independent links for radio access, i.e., without shadowing cross-correlation.…”

Section: Introductionmentioning

confidence: 99%

“…However, the supporting analysis is conducted under the assumption of independent links for radio access, i.e., without shadowing cross-correlation. According to the simulation results in [6], [7], and a mathematical framework developed for device-to-device communication systems in [9], the shadowing cross-correlation between different wireless links has significant impact on the reliability. Nevertheless, analyzing the impact of correlation on the E2E network reliability and its consideration on the design of the network supporting URLLC applications is still an open problem.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Impact of Correlated Failures in 5G Dual Connectivity Architectures for URLLC Applications

Ganjalizadeh

Marco

Kronander

et al. 2019

2019 IEEE Globecom Workshops (GC Wkshps)

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Achieving end-to-end ultra-reliability and resiliency in mission critical communications is a major challenge for future wireless networks. Dual connectivity has been proposed by 3GPP as one of the viable solutions to fulfill the reliability requirements. However, the potential correlation in failures occurring over different wireless links is commonly neglected in current network design approaches. In this paper, we investigate the impact of realistic correlation among different wireless links on end-to-end reliability for two selected architectures from 3GPP. In ultrareliable use-cases, we show that even small values of correlation can increase the end-to-end error rate by orders of magnitude. This may suggest alternative feasible architecture designs and paves the way towards serving ultra-reliable communications in 5G networks.

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Packet Duplication for URLLC in 5G: Architectural Enhancements and Performance Analysis

Cited by 90 publications

References 5 publications

Wireless Access in Ultra-Reliable Low-Latency Communication (URLLC)

Wireless Access in Ultra-Reliable Low-Latency Communication (URLLC)

Opportunistic Spatial Preemptive Scheduling for URLLC and eMBB Coexistence in Multi-User 5G Networks

Impact of Correlated Failures in 5G Dual Connectivity Architectures for URLLC Applications

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