The present disclosure provides a method performed at UE, including: receiving system information from a base station, the system information including indication information for indicating that or whether the base station supports an extended DPR; and determining, according to capability information for indicating that the UE supports an extended DPR and the received indication information for indicating that the base station supports an extended DPR, to transmit an extended DPR to the base station in Message 3. The present disclosure further provides a method performed at UE for reporting a capability as to that or whether an extended DPR is supported, a method performed at a base station for receiving an extended DPR, a method performed at a base station for requesting UE to report a capability as to that or whether an extended DPR is supported, corresponding UE and base stations, and a computer-readable medium.
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