ns to the previous and new local data network are temporarily active in parallel to allow for applications to bind to the new PDU session in order to avoid service interruption. 3 5G System Overview 3.2.6 Network Slicing The rise of vertical use-cases that go beyond traditional mobile broadband, i.e. the increas- ing interest in LPWA IoT, MCS/MPS as well as the emerging demand for ultra-reliable low latency communications (URLLC) services, emphasizes the need to support diverse core network functionalities and configurations in the same PLMN. The key enabler for this is network slicing, which allows operators to deploy multiple independent and isolated sets of 5GC network functions in the same network; create multiple 5GC (and RAN) configurations, e.g. one configuration tailored to support many IoT devices such as sensors, which however only send small amounts of data, and yet another configuration for high-throughput mobile broadband customers; select the appropriate 5GC implementation and configuration dynamically for a given UE depending on subscription and applications running on the UE. It is important to emphasize that the concept of network slicing as defined for 5GC is not fundamentally new. Earlier generations of 3GPP-based mobile networks supported a steadily increasing degree of flexibility for selecting core network functions and network configurations, for example, based on subscription, data network to establish a session to, etc.: 3GPP Release-97 introduced the General Packet Radio Service (GPRS), which enables transfer of packetized data via 2G and later 3G mobile radio (3GPP TS 03.60, 1997). GPRS allows for selection of the Gateway GPRS Support Node (GGSN), the equivalent of the PGW in EPS, based on Access Point Name (APN). The APN identifies the data network to connect to and typically gets signaled by the UE during packet data protocol (PDP) context establishment (session establishment). By configuring UEs with different APNs (e.g. "Internet" and "corporate"), this feature allowed for selection