FV deployments. In 5G networks, there are three types of session and service continuity (SSC) modes. Different SSC modes can guarantee different levels of service continuity. As shown in Fig. 1.49, SSC mode 1 maintains the same UPF. In SSC mode 2, the network may trigger the release of the PDU session and instruct the UE to establish a new PDU session to the same data network immediately. Upon establishment of the new PDU session, a new UPF acting as PDU session anchor can be selected. In SSC mode 3, the network allows the establishment of UE connectivity via a new UPF to the same application server before con- nectivity between the UE and the previous UPF is terminated. Different applications have different service and session continuity requirements. Therefore, in order to achieve effi- cient control of MEC APPs with different SSC mode requirements in 5G network, the coor- dination between ME APPs on the ME host and the 5G network, for example, how to indicate the SSC mode requirement of an ME APP to the 5G network, must be carefully considered. Servers Servers Servers Servers ((HH)) ((HH)) ((HII) ((HH) (((III)) SSC mode 1 SSC mode 2 SSC mode 1 Figure 1.49 SSC modes [3,4]. 5G Network Architecture 109 A large part of the functionality providing data connectivity is for supporting flexible deployment of application functions (AFs) in the network topology as needed for edge com- puting, which is supported via the three different SSC modes or via the functionality of uplink classifiers and branching points. The SSC modes include the traditional SSC 1 mode, where the IP anchor remains stable to provide continuous support of applications and to maintain the path toward the UE as its location is updated. The new modes allow relocating the IP anchor. There are two options, make-before-break (SSC mode 3) and break-before- make (SSC mode 2). The architecture enables applications to influence selection of suitable data service characteristics and SSC modes. Given that 5G network deployments are expected to serve extremely