Section: 6.3.2 Requirements 6.3.2.1 General
Content: Based on operator policy, the 5G system shall enable the UE to select, manage, and efficiently provision services over the 3GPP or non-3GPP access. Based on operator policy, the 5G system shall support steering a UE to select certain 3GPP access network(s). Based on operator policy, the 5G system shall be able to dynamically offload part of the traffic (e.g. from 3GPP RAT to non-3GPP access technology), taking into account traffic load and traffic type. Based on operator policy, the 5G system shall be able to provide simultaneous data transmission via different access technologies (e.g. NR, E-UTRA, non-3GPP), to access one or more 3GPP services. When a UE is using two or more access technologies simultaneously, the 5G system shall be able to optimally distribute user traffic over the access technologies in use, taking into account e.g. service, traffic characteristics, radio characteristics, and UE's moving speed. The 5G system shall be able to support data transmissions optimized for different access technologies (e.g. 3GPP, non-3GPP) and accesses to local data networks (e.g. local traffic routing) for UEs that are simultaneously connected to the network via different accesses. NOTE: This applies to the scenario with simultaneous 3GPP and non-3GPP accesses. Based on operator policy, the 5G system shall be able to add or drop the various access connections for a UE during a session. The 5G system shall be able to support mobility between the supported access networks (e.g. NG-RAN, WLAN, fixed broadband access network, 5G satellite access network). The 5G system shall support UEs with multiple radio and single radio capabilities. The 5G system shall support dynamic and static network address allocation of a common network address to the UE over all supported access types. The 5G system shall support a set of identities for a single user in order to provide a consistent set of policies and a single set of services across 3GPP and non-3GPP access types. The 5G system shall support the capability to operate in licensed and/or unlicensed bands.