A network transmitting a duration of a subframe of a first type to a communication device; transmitting a multiplexing scheme for the subframe of the first type and a subframe of a second type to the communication device, wherein the duration of the subframe of the first type is shorter than a duration of the subframe of the second type; determining a duration of a subframe of a third type, wherein the duration of the subframe of the second type is not an integral multiple of the duration of the subframe of the first type; transmitting the duration of the subframe of the third type to the communication device; and performing the communication operation in a plurality of subframes of the first type in at least one subframe of the third type according to the multiplexing scheme via a physical channel.