2018/04/18 by Rahif Kassab, Osvaldo Simeone, Kassab, Rahif +3
Engineering · #Advanced MIMO Systems Optimization #Advanced Wireless Communication Technologies #FOS: Computer and information sciences #Information Theory (cs.IT) #Networking and Internet Architecture (cs.NI) #Wireless Communication Security Techniques
paper · pdf · doi:10.48550/arxiv.1804.06593
openalex publication_date 2018/04/18 · openalex created_date 2022/08/16 · openalex updated_date 2026/07/28
The performance of orthogonal and non-orthogonal multiple access is studied\nfor the multiplexing of enhanced Mobile BroadBand (eMBB) and Ultra-Reliable\nLow-Latency Communications (URLLC) users in the uplink of a multi-cell Cloud\nRadio Access Network (C-RAN) architecture. While eMBB users can operate over\nlong codewords spread in time and frequency, URLLC users' transmissions are\nrandom and localized in time due to their low-latency requirements. These\nrequirements also call for decoding of their packets to be carried out at the\nedge nodes (ENs), whereas eMBB traffic can leverage the interference management\ncapabilities of centralized decoding at the cloud. Using information-theoretic\narguments, the performance trade-offs between eMBB and URLLC traffic types are\ninvestigated in terms of rate for the former, and rate, access latency, and\nreliability for the latter. The analysis includes non-orthogonal multiple\naccess (NOMA) with different decoding architectures, such as puncturing and\nsuccessive interference cancellation (SIC). The study sheds light into\neffective design choices as a function of inter-cell interference,\nsignal-to-noise ratio levels, and fronthaul capacity constraints.\n