Method and device for improved communication performance in wireless communication system

A terminal comprising:

• a transceiver;
• and
• a controller configured to:
• receive a radio resource control (RRC) message comprising information indicating whether to use uplink data compression (UDC) from a base station,
• receive data from an upper application layer of the terminal,
• compress the data and encrypt the compressed data,
• generate an uplink data compression (UDC) header and a service data adaptation protocol (SDAP) header together,
• generate a block to which the UDC header and the SDAP header are bonded in the encrypted data, and
• transmit the block to a lower layer of the terminal.

A method of operating a base station, the method comprising:

• transmitting a radio resource control (RRC) message comprising information indicating whether to use uplink data compression (UDC) to a terminal;
• receiving first data from the terminal;
• obtaining an uplink data compression (UDC) header and a service data adaptation protocol (SDAP) header, which are bonded in the first data;
• decoding and decompressing second data from which the UDC header and the SDAP header are removed;
• and
• transmitting the decompressed second data to an upper layer of the base station.

A base station comprising:

• a transceiver;
• and
• a controller configured to:
• transmit a radio resource control (RRC) message comprising information indicating whether to use uplink data compression (UDC) to a terminal,
• receive first data from the terminal,
• obtain an uplink data compression (UDC) header and a service data adaptation protocol (SDAP) header, which are bonded in the first data,
• decode and decompress second data from which the UDC header and the SDAP header are removed, and
• transmit the decompressed second data to an upper layer of the base station.