A method of a terminal for communicating in a mobile communication system, the method comprising: receiving, from a base station (102, 103), downlink control information, DCI, (1100, 1400) the DCI including information associated with at least one of a plurality of transport blocks and bit information; and receiving data based on the DCI from the base station (102, 103) wherein a size of the bit information is 3 bits, wherein the bit information indicates a set of antenna ports, and a scrambling identifier, SCID, wherein the SCID is one of 0 and 1 and a number of antenna ports associated with the set of antenna ports is among 1 to 8, wherein the bit information is interpreted based on a number of enabled transport blocks among the plurality of transport blocks, and in case that the number of enabled transport blocks is 1: wherein the bit information indicates that an index of an antenna port is "7" and the SCID is "0", in case that the bit information is set to "0", wherein the bit information indicates that an index of the antenna port is "7" and the SCID is "1", in case that the bit information is set to "1", wherein the bit information indicates that an index of the antenna port is "8" and the SCID is "0", in case that the bit information is set to "2", wherein the bit information indicates that an index of the antenna port is "8" and the SCID is "1", in case that the bit information is set to "3", and wherein the bit information indicates that indices of antenna ports are "7" to "8", in case that the bit information is set to "4". receiving, from a base station (102, 103), downlink control information, DCI, (1100, 1400) the DCI including information associated with at least one of a plurality of transport blocks and bit information; and receiving data based on the DCI from the base station (102, 103) wherein a size of the bit information is 3 bits, wherein the bit information indicates a set of antenna ports, and a scrambling identifier, SCID, wherein the SCID is one of 0 and 1 and a number of antenna ports associated with the set of antenna ports is among 1 to 8, wherein the bit information is interpreted based on a number of enabled transport blocks among the plurality of transport blocks, and in case that the number of enabled transport blocks is 1: wherein the bit information indicates that an index of an antenna port is "7" and the SCID is "0", in case that the bit information is set to "0", wherein the bit information indicates that an index of the antenna port is "7" and the SCID is "1", in case that the bit information is set to "1", wherein the bit information indicates that an index of the antenna port is "8" and the SCID is "0", in case that the bit information is set to "2", wherein the bit information indicates that an index of the antenna port is "8" and the SCID is "1", in case that the bit information is set to "3", and wherein the bit information indicates that indices of antenna ports are "7" to "8", in case that the bit information is set to "4". wherein the bit information indicates that an index of an antenna port is "7" and the SCID is "0", in case that the bit information is set to "0", wherein the bit information indicates that an index of the antenna port is "7" and the SCID is "1", in case that the bit information is set to "1", wherein the bit information indicates that an index of the antenna port is "8" and the SCID is "0", in case that the bit information is set to "2", wherein the bit information indicates that an index of the antenna port is "8" and the SCID is "1", in case that the bit information is set to "3", and wherein the bit information indicates that indices of antenna ports are "7" to "8", in case that the bit information is set to "4".