A method performed by a base station for performing a handover of a user equipment, the method comprising: receiving, by the base station, a New Radio capability information message; analyzing a New Radio capability information element in the New Radio capability information message to determine whether the New Radio capability information element includes one or more of: a first optional core network field (910, 708, 722, 922, 934, 946) indicating that the user equipment supports an inter-radio-access-technology, inter-RAT, handover to an evolved universal terrestrial radio access, EUTRA, base station connected to a fifth-generation core, 5GC, network; or a second optional core network field (908, 808, 822, 914, 932, 938) indicating that the user equipment supports an inter-RAT handover to a EUTRA base station connected to an evolved packet core, EPC, network; determining whether the user equipment supports an inter-RAT handover to one or more of: a EUTRA base station connected to the 5GC network or a EUTRA base station connected to the EPC network based on whether the New Radio capability information element includes one or more of: the first optional core network field (910, 708, 722, 922, 934, 946) or the second optional core network field (908, 808, 822, 914, 932, 938), respectively; generating, based on the New Radio capability information element, a measurement configuration; sending the measurement configuration to the user equipment; receiving, from the user equipment, one or more measurement results based on the measurement configuration; determining, based on whether the user equipment supports an inter-RAT handover to one or more of: a EUTRA base station connected to the 5GC network or a EUTRA base station connected to the EPC network and the one or more measurement results, a handover type for the user equipment; and initiating the handover of the user equipment based on the determined handover type. receiving, by the base station, a New Radio capability information message; analyzing a New Radio capability information element in the New Radio capability information message to determine whether the New Radio capability information element includes one or more of: a first optional core network field (910, 708, 722, 922, 934, 946) indicating that the user equipment supports an inter-radio-access-technology, inter-RAT, handover to an evolved universal terrestrial radio access, EUTRA, base station connected to a fifth-generation core, 5GC, network; or a second optional core network field (908, 808, 822, 914, 932, 938) indicating that the user equipment supports an inter-RAT handover to a EUTRA base station connected to an evolved packet core, EPC, network; a first optional core network field (910, 708, 722, 922, 934, 946) indicating that the user equipment supports an inter-radio-access-technology, inter-RAT, handover to an evolved universal terrestrial radio access, EUTRA, base station connected to a fifth-generation core, 5GC, network; or a second optional core network field (908, 808, 822, 914, 932, 938) indicating that the user equipment supports an inter-RAT handover to a EUTRA base station connected to an evolved packet core, EPC, network; determining whether the user equipment supports an inter-RAT handover to one or more of: a EUTRA base station connected to the 5GC network or a EUTRA base station connected to the EPC network based on whether the New Radio capability information element includes one or more of: the first optional core network field (910, 708, 722, 922, 934, 946) or the second optional core network field (908, 808, 822, 914, 932, 938), respectively; generating, based on the New Radio capability information element, a measurement configuration; sending the measurement configuration to the user equipment; receiving, from the user equipment, one or more measurement results based on the measurement configuration; determining, based on whether the user equipment supports an inter-RAT handover to one or more of: a EUTRA base station connected to the 5GC network or a EUTRA base station connected to the EPC network and the one or more measurement results, a handover type for the user equipment; and initiating the handover of the user equipment based on the determined handover type.