2018/09/05 by Rahif Kassab, Kassab, Rahif, Osvaldo Simeone +5
Engineering · Computer Science · #Advanced MIMO Systems Optimization #Advanced Wireless Communication Technologies #Cooperative Communication and Network Coding
paper · pdf · doi:10.48550/arxiv.1809.01399
The fifth generation (5G) of cellular systems is introducing Ultra-Reliable\nLow-Latency Communications (URLLC) services alongside more conventional\nenhanced Mobile BroadBand (eMBB) traffic. Furthermore, the 5G cellular\narchitecture is evolving from a base station-centric deployment to a fog-like\nset-up that accommodates a flexible functional split between cloud and edge. In\nthis paper, a novel solution is proposed that enables the non-orthogonal\ncoexistence of URLLC and eMBB services by processing URLLC traffic at the Edge\nNodes (ENs), while eMBB communications are handled centrally at a cloud\nprocessor as in a Cloud-Radio Access Network (C-RAN) system. This solution\nguarantees the low-latency requirements of the URLLC service by means of edge\nprocessing, e.g., for vehicle-to-cellular use cases, as well as the high\nspectral efficiency for eMBB traffic via centralized baseband processing. Both\nuplink and downlink are analyzed by accounting for the heterogeneous\nperformance requirements of eMBB and URLLC traffic and by considering practical\naspects such as fading, lack of channel state information for URLLC\ntransmitters, rate adaptation for eMBB transmitters, finite fronthaul capacity,\nand different coexistence strategies, such as puncturing.\n