This standard defines extensible handover and other services (e.g.@ home energy management system@software-defined radio access networks@ radio resource management and device-to-device communication service) that are used in conjunction with the media independent services framework as defined in IEEEP802.21?/D04-July2016 Purpose The purpose of this standard is to improve the user experience and management of mobile devices bydescribing the necessary use cases and services to facilitate interworking between IEEE 802 networks.These use cases and sevices need to be implemented using the framework described in IEEE 24 P802.21?/D04-July2016. The services described in this specification are also applicable for interworkingbetween IEEE 802 networks and non IEEE 802 networks (e.g.@ Cellular networks).