This Recommendation describes the framework ofIP-based handover control (HC) for NGN, which includes design considerations, functional architecture, and procedural information flows for handover control. This Recommendation focuses on the terminal mobility where mobile terminals move around and change their IPaddress in the NGN. This Recommendation also focuses on the mobility management (MM) schemes that operate inthe network layer (or IP layer), whereas the issues on the mobility support in the service stratum will be addressed in another ITU-T MM Framework Recommendation.