A handover method, wherein the method comprises: sending , by a first primary network device , a third message to a second primary network device, wherein the third message is a handover request message to request a handover of a terminal device from the first primary network device to the second primary network device, the third message comprises a capability coordination result between the first primary network device and a secondary network device; receiving , by the first primary network device , a radio resource control, RRC, configuration of the second primary network device from the second primary network device, wherein the RRC configuration of the second primary network device is generated by the second primary network device and is based on the capability coordination result; and sending, by the first primary network device , the RRC configuration of the second primary network device to the terminal device , wherein the first primary network device and the second primary network device are both long term evolution, LTE, base stations or are both new radio, NR, base stations, and if the first primary network device and the second primary network device are both LTE base stations then the secondary network device is a NR base station, and if the first primary network device and the second primary network device are both NR base stations then the secondary network device is an LTE base station, wherein the capability coordination result comprises a size of a layer 2 buffer that is available to the first primary network device and/or a band combination that is available to the first primary network device , and wherein the terminal device is connected to the first primary network device and the secondary network device prior to the handover, and the terminal device is connected to the second primary network device and the secondary network device after the handover. sending , by a first primary network device , a third message to a second primary network device, wherein the third message is a handover request message to request a handover of a terminal device from the first primary network device to the second primary network device, the third message comprises a capability coordination result between the first primary network device and a secondary network device; receiving , by the first primary network device , a radio resource control, RRC, configuration of the second primary network device from the second primary network device, wherein the RRC configuration of the second primary network device is generated by the second primary network device and is based on the capability coordination result; and sending, by the first primary network device , the RRC configuration of the second primary network device to the terminal device , wherein the first primary network device and the second primary network device are both long term evolution, LTE, base stations or are both new radio, NR, base stations, and if the first primary network device and the second primary network device are both LTE base stations then the secondary network device is a NR base station, and if the first primary network device and the second primary network device are both NR base stations then the secondary network device is an LTE base station, wherein the capability coordination result comprises a size of a layer 2 buffer that is available to the first primary network device and/or a band combination that is available to the first primary network device , and wherein the terminal device is connected to the first primary network device and the secondary network device prior to the handover, and the terminal device is connected to the second primary network device and the secondary network device after the handover. <EOS>