 data flow filter(s), or be configured in the UPF, as the application detection filter identified by an application identifier. In the latter case, the application identifier has to be configured in the SMF and the UPF. In this context, service data flow filter is a set of packet flow header parameter values/ranges used to identify one or more of the packet (IP or Ethernet) flows constituting a service data flow. service data flow template is the set of service data flow filters in a policy rule or an application identi- fier in a policy rule referring to an application detection filter, required for defining a service data flow. 130 Chapter 1 are the protocols implementing the actual PDU session carrying user data through the AS; and the control-plane protocols that are the protocols for controlling the PDU session and the connection between the UE and the network from different aspects including requesting the service, controlling different transmission resources, handover, etc. In LTE, several radio network temporary identifiers (RNTIs) were used to identify a connected-mode UE within a cell, a specific physical channel, a group of UEs in case of paging, a group of UEs for which power control command is issued by the eNB, system information transmitted for all UEs by the eNB, etc. In general, the RNTIs are used to scramble the CRC part of the radio channel messages. This implies that if the UE does not know the exact RNTI values for each of the cases, it cannot decode the radio channel mes- sages even though the message reaches to the UE. The radio network and UE identifiers in NR, while similar to those of LTE, have been adapted to support new features and function- alities of NR and the 5GC such as multi-connectivity and network slicing. When an NR- compliant UE is connected to 5GC, the following identities are used at cell level to uniquely identify the UE (Fig. 1.63): Cell Radio Network Temporary Identifier (C-RNTI) is a unique identification, which is used as an identifier of the RRC connection and for sc