US Patent 11838820 Methods, devices, and systems for service-driven mobility management

A UE for performing mobility management is disclosed. The UE includes at least one non-transitory computer-readable medium storing computer-executable instructions, and at least one processor coupled to the at least one non-transitory computer-readable medium, and configured to execute the computer-executable instructions to: transmit, to a first network node, a RRC message indicating a required network slice/service of the UE, the required network slice/service uniquely identified by S-NSSAI; receive, from the first network node, a second RRC message including information of a second network node that supports the required network slice/service of the UE when the required network slice/service identified by the S-NSSAI is not supported by the first network node; and perform a mobility management procedure based on the information of the second network node received from the first network node when the required network slice/service is not supported by the first network node.