eMBB-URLLC Resource Slicing

Ultra Reliable Low Latency Communication (URLLC) is a 5G New Radio (NR) application that requires strict reliability and latency. URLLC traffic is usually scheduled on top of the ongoing enhanced Mobile Broadband (eMBB) transmissions (i.e., puncturing the current eMBB transmission) and cannot be queued due to its hard latency requirements. In this letter, we propose a risk-sensitive based formulation to allocate resources to the incoming URLLC traffic, while minimizing the risk of the eMBB transmission (i.e., protecting the eMBB users with low data rate) and ensuring URLLC reliability. Specifically, the Conditional Value at Risk (CVaR) is introduced as a risk measure for eMBB transmission. Moreover, the reliability constraint of URLLC is formulated as a chance constraint and relaxed based on Markov’s inequality. We decompose the formulated problem into two subproblems in order to transform it into a convex form and then alternatively solve them until convergence. Simulation results show that the proposed approach allocates resources to the incoming URLLC traffic efficiently, while satisfying the reliability of both eMBB and URLLC.

Authors:
Alsenwi Madyan, Tran Nguyen H., Bennis Mehdi, Bairagi Anupam Kumar, Hong Choong Seon

Publication type:
A1 Journal article – refereed

Place of publication:

Keywords:
5G NR, CVaR, eMBB, latency, Reliability, resource slicing, risk-sensitive, URLLC

Published:

Full citation:
M. Alsenwi, N. H. Tran, M. Bennis, A. Kumar Bairagi and C. S. Hong, “eMBB-URLLC Resource Slicing: A Risk-Sensitive Approach,” in IEEE Communications Letters, vol. 23, no. 4, pp. 740-743, April 2019. doi: 10.1109/LCOMM.2019.2900044

DOI:
https://doi.org/10.1109/LCOMM.2019.2900044

Read the publication here:
http://urn.fi/urn:nbn:fi-fe2019052917649