A method of a user equipment, in the following also referred to as UE, comprising: receiving configuration information of a group of control resource sets, in the following also referred to as CORESETs, from a base station of a serving cell in a wireless communications network, wherein the configuration information of each CORESET comprises at least a CORESET-ID; receiving a downlink control information, in the following also referred to as DCI, over a physical downlink control channel, in the following also referred to as PDCCH, that schedules a physical downlink shared channel, in the following also referred to as PDSCH, to be received on a bandwidth part, in the following also referred to as BWP, of the serving cell by the UE after a time offset; determining a reference CORESET from one or more CORESETs of the group of CORESETs based on a predefined rule, wherein the one or more CORESETs of the group of CORESETs are associated with the BWP of the serving cell; assuming one or more demodulation reference signal, in the following also referred to as DMRS, ports of the PDSCH are Quasi-Co-Located, in the following also referred to as QCLed, with one or more reference signals used for a QCL assumption for PDCCH reception in the reference CORESET when the time offset is less than a minimum time duration for PDSCH reception; and performing reception for the PDSCH on the BWP of the serving cell, characterized in that if an activation command that activates one of transmission configuration indication, in the following also referred to as TCI, states configured by the configuration information of the reference CORESET is received by the UE, the one or more reference signals used for the QCL assumption for PDCCH reception in the reference CORESET are one or more downlink reference signals configured by said one of TCI states, and if no TCI states is configured by the configuration information of the reference CORESET, the one or more reference signals used for the QCL assumption for PDCCH reception in the reference CORESET are a synchronization signal block, in the following also referred to as SSB, the UE identified during a random access procedure. receiving configuration information of a group of control resource sets, in the following also referred to as CORESETs, from a base station of a serving cell in a wireless communications network, wherein the configuration information of each CORESET comprises at least a CORESET-ID; receiving a downlink control information, in the following also referred to as DCI, over a physical downlink control channel, in the following also referred to as PDCCH, that schedules a physical downlink shared channel, in the following also referred to as PDSCH, to be received on a bandwidth part, in the following also referred to as BWP, of the serving cell by the UE after a time offset; determining a reference CORESET from one or more CORESETs of the group of CORESETs based on a predefined rule, wherein the one or more CORESETs of the group of CORESETs are associated with the BWP of the serving cell; assuming one or more demodulation reference signal, in the following also referred to as DMRS, ports of the PDSCH are Quasi-Co-Located, in the following also referred to as QCLed, with one or more reference signals used for a QCL assumption for PDCCH reception in the reference CORESET when the time offset is less than a minimum time duration for PDSCH reception; and performing reception for the PDSCH on the BWP of the serving cell, characterized in that if an activation command that activates one of transmission configuration indication, in the following also referred to as TCI, states configured by the configuration information of the reference CORESET is received by the UE, the one or more reference signals used for the QCL assumption for PDCCH reception in the reference CORESET are one or more downlink reference signals configured by said one of TCI states, and if no TCI states is configured by the configuration information of the reference CORESET, the one or more reference signals used for the QCL assumption for PDCCH reception in the reference CORESET are a synchronization signal block, in the following also referred to as SSB, the UE identified during a random access procedure.