Section: 6.2.1 Description
Content: A key feature of 5G is support for UEs with different mobility management needs. 5G will support UEs with a range of mobility management needs, including UEs that are - stationary during their entire usable life (e.g. sensors embedded in infrastructure), - stationary during active periods, but nomadic between activations (e.g. fixed access), - mobile within a constrained and well-defined space (e.g. in a factory), and - fully mobile. Moreover, some applications require the network to ensure seamless mobility of a UE so that mobility is hidden from the application layer to avoid interruptions in service delivery while other applications have application specific means to ensure service continuity. But these other applications can still require the network to minimize interruption time to ensure that their application-specific means to ensure service continuity work effectively. With the ever-increasing multimedia broadband data volumes, it is also important to enable the offloading of IP traffic from the 5G network onto traditional IP routing networks via an IP anchor node close to the network edge. As the UE moves, changing the IP anchor node can be needed in order to reduce the traffic load in the system, reduce end-to-end latency and provide a better user experience. The flexible nature of a 5G system will support different mobility management methods that minimize signalling overhead and optimize access for these different types of UEs.