1. A method for controlling the operation of a continuous packet transmission mode, CPC, performed in a radio network controller of a wireless communication system, characterized in that it comprises the steps of: determining (820) that there is a potential mismatch in the CPC activation status between the user equipment, the UE, and its serving base station; After responding to the determination that there is a potential mismatch in the CPC activation status, a CPC recovery indicator in the frame header of at least one user plane frame sent to the serving base station for the UE.2 is sent (830). The method according to claim 1, wherein determining (820) that there is a potential mismatch in the activation status of the CPC comprises the step of determining that the UE has heterogeneous behavior with respect to remembering the activation status of the CPC. The method of claim 1 or 2, wherein determining (820) that there is a potential mismatch in the CPC activation status, comprises deciding that a CPC recovery procedure is necessary when all of the following applies: the CPC is configured in the active set for the UE ; The release version of the UE is 3GPP release 7 or 3GPP release 8; another timing of discontinuous transmission or discontinuous reception, or both, is reported to the UE in a handover procedure. 4. A method according to any one of claims 1 to 2, wherein the CPC recovery indicator is sent in connection with a soft handover procedure. The method according to any one of claims 1 to 2, in which the CPC recovery indicator is sent in the frame header of each of a predetermined number of consecutive user plane frames sent to the serving base c�
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