Optimal resource preemption for aperiodic URLLC traffic in 5G Networks

In this paper, we study DownLink Preemption (DLP), a feature enabling dynamic scheduling for Ultra Reliable Low Latency Communications (URLLC) in the presence of ongoing enhanced Mobile Broad Band (eMBB) flows. We design a DLP technique with the objective of maximizing the admission of URLLC packets while minimizing the impact of preemption on the eMBB throughput. We propose two different approaches to solve the DLP problem. A first, the Offline Preemption Approach (OPA), is formulated as a multi-objective Integer Linear Program (ILP) and considers a perfect knowledge of traffic dynamics. We further propose the Impact-Aware Preemption Approach (IAPA), an algorithm solving the DLP problem and performing joint admission and preemption decisions on the fly. We conduct extensive simulations using a system level simulator in realistic 5G Network settings. Our numerical results demonstrate the efficiency of IAPA in guaranteeing a close-to-optimum performance.

[1]  Klaus I. Pedersen,et al.  Null Space Based Preemptive Scheduling for Joint URLLC and eMBB Traffic in 5G Networks , 2018, 2018 IEEE Globecom Workshops (GC Wkshps).

[2]  Tiejun Lv,et al.  Enabling Technologies for Ultra-Reliable and Low Latency Communications: From PHY and MAC Layer Perspectives , 2019, IEEE Communications Surveys & Tutorials.

[3]  Patrick Brown,et al.  Radio Resource Allocation and Retransmission Schemes for URLLC Over 5G Networks , 2019, IEEE Journal on Selected Areas in Communications.

[4]  Choong Seon Hong,et al.  A Downlink Resource Scheduling Strategy for URLLC Traffic , 2019, 2019 IEEE International Conference on Big Data and Smart Computing (BigComp).

[5]  Georgios S. Paschos,et al.  Complexity of URLLC Scheduling and Efficient Approximation Schemes , 2019, 2019 International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks (WiOPT).

[6]  Charbel Abdel Nour.  Enhanced Turbo Codes for NR: Performance Evaluation , 2016 .

[7]  Klaus I. Pedersen,et al.  Punctured Scheduling for Critical Low Latency Data on a Shared Channel with Mobile Broadband , 2017, 2017 IEEE 86th Vehicular Technology Conference (VTC-Fall).

[8]  Ana Galindo-Serrano,et al.  Performance Evaluation of 5G Radio Configurations for Industry 4.0 , 2019, 2019 International Conference on Wireless and Mobile Computing, Networking and Communications (WiMob).

[9]  Gustavo de Veciana,et al.  Joint Scheduling of URLLC and eMBB Traffic in 5G Wireless Networks , 2017, IEEE INFOCOM 2018 - IEEE Conference on Computer Communications.