SDN-based management of time-sensitive networks in 5G fronthaul

Abstract

Software Defined Networking is a key element in the 5G architecture, as it allows a more flexible, dynamic network management. Cloud RAN is another enabler of 5G, due to the expected increased based station density in the fronthaul. In Cloud RAN deployments the I/Q signals are transported in the CPRI format over access networks, thus requiring QoS guarantees regarding loss, bandwidth and latency. TimeSensitive Networking (TSN) is a new technology that introduces synchronous capabilities in Ethernet networks, and is one of the most promising technologies for 5G fronthaul and backhaul. Therefore, the SDN-based management of TSN is an important topic, in order to coordinate the fronthaul, backhaul and core 5G networks. The IEEE 802.1Qcc and 802.1CM working groups are currently standardizing the SDN management of TSN and the use of TSN in the fronthaul. This paper describes the architecture and state of the standards, and presents a design and implementation status of a TSN SDN-based controller.