CPRI over Ethernet: Towards fronthaul/backhaul multiplexing
Mahmoud Bahnasy, Halima Elbiaze, Catherine Truchan · 2018
Ethernet has been proposed for the 5G fronthaul to transport the Common Public Radio Interface (CPRI) traffic between the radio equipment (RE) and the radio equipment control (REC). The advantages of adopting an Ethernet transport are threefold 1) the low cost of equipment, 2) the use of a shared infrastructure with statistical multiplexing, as well as 3) the ease of operations, administration and maintenance (OAM). In this paper, we introduce distributed timeslot scheduler for CPRI over Ethernet (DTSCoE) as a scheduling algorithm for IEEE 802.1Qbv to support CPRI traffic. DTSCoE is built upon the stream reservation protocol (SRP) IEEE 802.1Qcc to propagate timeslot information across the datapath without any centralized coordination. The simulation results demonstrate that DTSCoE reduces one-way delay to minimum and reduces the jitter to zero which satisfies the CPRI requirements.