DPDK Summit Bangalore 2019

User Plane Function(UPF) handling the data plane traffic of 5G is responsible to handle various types of traffic. The UPF is expected to be implemented in virtual form considering the horizontal scalability and in a cloud native way. One of the choice of implementation is using DPDK and FD.io components. GTP-U is realized using the VPP and QoS enforcement check for the uplink (UL) and DSCP marking for the downlink(DL) is realized the using the DPDK pipeline. The implementation is planned in such a way that it is horizontally scale considering the higher throughput and performance need. Considering the stringent performance numbers of 5G application UPF instances are expected to handle independently certain specific flows / services pertaining to a gNodeB or group of gNodeBs. In each of the UPF instances the flow based QoS mapping based on the 5QI (QFI) value of the GFP extension header used for classification, marking and rate limiting. The SR-IOV capability of the NIC interface is used to classify and segregate the traffic to the UPF instances. This concept also cover the number of hierarchies from the QoS aspects and the approach to map the DPDK H-QoS scheduler and also from the shaping perspective for the non GBR flows to gurantee the GBR flows.