5G is a disruptive technology mandatorily needed to meet the capacity and performance requirements of future networks. Massive bandwidth needs and extremely low latency requirements, needed by burgeoning applications (like AI, IoT, AR/VR), require 5G to be facilitated by other emerging technologies like SDN/NFV and multi-access edge computing (MEC). By bringing the computing closer to the user, MEC promises to meet the desired latency and bandwidth constraints. Standardization bodies, like 3GPP (for 5G) and ETSI (for MEC), have been working towards streamlining the procedures for interworking of 5G core and MEC systems. The 5G and MEC specifications give an insight into the future integration strategy expected – making MEC work as a 5G application function to interact with the 3GPP 5G system for traffic steering and reception of mobility events. But a complete flow of information between MEC function entities and the 5G core network functions on application initiation and UE mobility seems to be missing at this point of time. This paper intends to dig into some of these interworking issues and explains the interactions between the participating entities during the complete application lifecycle.
Keywords — MEC (Multi-access edge computing), 5G (5th generation), UE application offloading, 5G application functions