Method and device for transmitting and receiving data in wireless communication system

A method for performed by a base station, in a communication system, the method comprising:

• receiving, from a user equipment (UE), a short truncated buffer status report (BSR) including an identifier (ID) of a logical channel group (LCG) among the plurality of LCGs and information on a buffer size for the LCG, in case that the plurality of LCGs have data available for transmission and a number of padding bits is equal to a size of a short BSR plus its subheader;
• and
• receiving, from the UE, a long truncated BSR including a bit map associated with the plurality of LCGs and information on a buffer size for at least one LCG among the plurality of LCGs, in case that the plurality of LCGs have the data available for transmission and the number of padding bits is larger than the size of the short BSR plus its subheader,
• wherein the at least one LCG among the plurality of LCGs is based on a highest priority logical channel in each LCG of the plurality of LCGs.

A user equipment (UE) in a communication system, the UE comprising:

• a transceiver;
• and
• a processor coupled with the transceiver and configured to:
• identify whether a plurality of logical channel groups (LCGs) have data available for transmission in case that a buffer status report (BSR) is to be built,
• in case that the plurality of LCGs have the data available for transmission, identify whether a number of padding bits is equal to or larger than a size of a short BSR plus its subheader,
• transmit, to the base station, a short truncated BSR including an identifier (ID) of a LCG among the plurality of LCGs and information on a buffer size for the LCG, in case that the number of padding bits is equal to the size of the short BSR plus its subheader, and
• transmit, to the base station, a long truncated BSR including a bit map associated with the plurality of LCGs and information on a buffer size for at least one LCG among the plurality of LCGs, in case that the number of padding bits is larger than the size of the short BSR plus its subheader,
• wherein the at least one LCG among the plurality of LCGs is determined based on a highest priority logical channel in each LCG of the plurality of LCGs.

A base station in a communication system, the base station comprising:

• a transceiver;
• and
• a processor coupled with the transceiver and configured to:
• receive, from a user equipment (UE), a short truncated buffer status report (BSR) including an identifier (ID) of a logical channel group (LCG) among the plurality of LCGs and information on a buffer size for the LCG, in case that the plurality of LCGs have data available for transmission and a number of padding bits is equal to a size of a short BSR plus its subheader, and
• receive, from the UE, a long truncated BSR including a bit map associated with the plurality of LCGs and information on a buffer size for at least one LCG among the plurality of LCGs, in case that the plurality of LCGs have the data available for transmission and the number of padding bits is larger than the size of the short BSR plus its subheader,
• wherein the at least one LCG among the plurality of LCGs is based on a highest priority logical channel in each LCG of the plurality of LCGs.