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Coexistence of URLLC and eMBB Services in the C-RAN Uplink: An Information-Theoretic Study

Research output: Contribution to conference typesPaper

Rahif Kassab, Osvaldo Simeone, Petar Popovski

Original languageEnglish
DOIs
Publication statusE-pub ahead of print - 21 Feb 2019
Event2018 IEEE Global Communications Conference, GLOBECOM 2018 - Abu Dhabi, United Arab Emirates
Duration: 9 Dec 201813 Dec 2018

Conference

Conference2018 IEEE Global Communications Conference, GLOBECOM 2018
CountryUnited Arab Emirates
CityAbu Dhabi
Period9/12/201813/12/2018

King's Authors

Abstract

The performance of orthogonal and non-orthogonal multiple access is studied for the multiplexing of enhanced Mobile BroadBand (eMBB) and Ultra-Reliable Low-Latency Communications (URLLC) users in the uplink of a multi-cell Cloud Radio Access Network (C-RAN) architecture. While eMBB users can operate over long codewords spread in time and frequency, URLLC users' transmissions are random and localized in time due to their low-latency requirements. These requirements also call for decoding of URLLC packets to be carried out at the edge nodes (ENs), whereas eMBB traffic can leverage the interference management capabilities of centralized decoding at the cloud. Using information-theoretic arguments, the performance tradeoffs between eMBB and URLLC traffic types are investigated in terms of rate for the former, and rate, access latency, and reliability for the latter. The analysis includes non-orthogonal multiple access (NOMA) with different decoding architectures, such as puncturing and successive interference cancellation (SIC). The main results bring insight on effective design choices as a function of inter-cell interference, signal-to-noise ratio levels, and fronthaul capacity constraints.

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