Ue capability reporting method and apparatus

A communications system, wherein the communications system comprises user equipment UE, a target access network device, and a source access network device, wherein

• the UE is configured to obtain first information, wherein the first information is used to indicate a UE capability supported by the target access network device, the first information is carried by an RRC connection reconfiguration from a source access network device, or the first information is carried by a UE capability enquiry request from the target access network device, or the first information is carried by a UE capability enquiry request from the source access network device;
• and
• the UE is configured to report second information based on the UE capability supported by the target access network device and a UE capability of the UE, wherein the second information comprises capability information which is absent of UE capability information stored in the source access network device in target capability information, and wherein the target capability information is UE capability information of a lower UE capability in the UE capability of the UE and the UE capability supported by the target access network device.

User equipment UE, wherein the UE comprises a processor and a communications interface, and the processor and the communications interface are configured to support the UE in performing a method, wherein the method comprises:

• obtaining first information, wherein the first information is used to indicate a UE capability supported by a target access network device, the first information is carried by an RRC connection reconfiguration from a source access network device, or the first information is carried by a UE capability enquiry request from the target access network device, or the first information is carried by a UE capability enquiry request from the source access network device;
• and
• reporting second information based on the UE capability supported by the target access network device and a UE capability of the UE, wherein the second information comprises capability information which is absent of UE capability information stored in the source access network device in target capability information, and wherein the target capability information is UE capability information of a lower UE capability in the UE capability of the UE and the UE capability supported by the target access network device.