Integrating Fronthaul and Backhaul Networks: Transport Challenges and Feasibility Results

Sergio Gonzalez-Diaz, Andres Garcia-Saavedra, Antonio de la Oliva, Xavier Costa-Pérez, Robert Gazda, Alain Mourad, Thomas Deiß, Josep Mangues-Bafalluy, Paola Iovanna, Stefano Stracca, Phillip Leithead

Abstract: In addition to CPRI, new functional splits have been defined in 5G creating diverse fronthaul transport bandwidth and latency requirements. These fronthaul requirements shall be fulfilled simultaneously together with the backhaul requirements by an integrated fronthaul and backhaul transport solution. In this paper, we analyze the technical challenges to achieve an integrated transport solution in 5G and propose specific solutions to address these challenges. These solutions have been implemented and verified with pre-commercial equipment. Our results confirm that an integrated fronthaul and backhaul transport dubbed Crosshaul can meet all the requirements of 5G fronthaul and backhaul in a cost-efficient manner.