An apparatus (102; 600; 900) for receiving configuration information, comprising: a memory that stores a plurality of instructions; and a processor coupled to the memory and configured to execute the instructions to: receive configuration information carried by radio resource control signaling transmitted by a network device (101; 700; 800) for configuring transmission, and configure or predefine one or more transmission configuration indication states for one or more demodulation reference signal port groups based on the configuration information, wherein the processor is further configured to receive media access control signaling and/or downlink control information transmitted by the network device (101; 700; 800) to activate the one or more transmission configuration indication states, wherein when an offset between the downlink control information and a corresponding physical downlink shared channel is less than a predetermined threshold, one or more demodulation reference port groups of the physical downlink shared channel are configured or predefined with default transmission configuration indication states, wherein an antenna port of the demodulation reference port group of the physical downlink shared channel and one or more reference signal sets of one or more control resource sets are spatially quasi-co-located, characterized in that the one or more reference signal sets are at least two reference signal sets corresponding to a transmission configuration indication state configured as being default in the at least two control resource sets a memory that stores a plurality of instructions; and a processor coupled to the memory and configured to execute the instructions to: receive configuration information carried by radio resource control signaling transmitted by a network device (101; 700; 800) for configuring transmission, and configure or predefine one or more transmission configuration indication states for one or more demodulation reference signal port groups based on the configuration information, receive configuration information carried by radio resource control signaling transmitted by a network device (101; 700; 800) for configuring transmission, and configure or predefine one or more transmission configuration indication states for one or more demodulation reference signal port groups based on the configuration information, wherein the processor is further configured to receive media access control signaling and/or downlink control information transmitted by the network device (101; 700; 800) to activate the one or more transmission configuration indication states, wherein when an offset between the downlink control information and a corresponding physical downlink shared channel is less than a predetermined threshold, one or more demodulation reference port groups of the physical downlink shared channel are configured or predefined with default transmission configuration indication states, wherein an antenna port of the demodulation reference port group of the physical downlink shared channel and one or more reference signal sets of one or more control resource sets are spatially quasi-co-located, characterized in that the one or more reference signal sets are at least two reference signal sets corresponding to a transmission configuration indication state configured as being default in the at least two control resource sets