Structure of mac sub-header for supporting next generation mobile communication system and method and apparatus using the same

A transmitting device for delivering data in a wireless communication system, the transmitting device comprising:

• a transceiver configured to transmit and receive a signal;
• and
• a controller coupled with the transceiver and configured to:
• obtain a plurality of medium access control (MAC) service data units (SDUs) from an upper layer,
• generate a MAC protocol data unit (PDU) including a MAC control element (CE) and the plurality of MAC SDUs, wherein a first MAC subheader for the MAC CE is placed immediately in front of the MAC CE and a plurality of second MAC subheaders is placed immediately in front of a corresponding MAC SDU from the plurality of MAC SDUs, and
• deliver the MAC PDU to a lower layer,
• wherein the MAC CE with the first MAC subheader is placed before the plurality of MAC SDUs in the MAC PDU.

A method for receiving data by a receiving device in a wireless communication system, the method comprising:

• receiving a medium access control (MAC) protocol data unit (PDU) from a lower layer;
• and
• identifying a MAC control element (CE) and a plurality of MAC service data units (SDUs) from the MAC PDU, wherein the MAC PDU includes a first MAC subheader for the MAC CE which is placed immediately in front of the MAC CE and a plurality of second MAC subheaders which is placed immediately in front of a corresponding MAC SDU from the plurality of MAC SDUs,
• wherein the MAC CE with the first MAC subheader is placed before the plurality of MAC SDUs in the MAC PDU.

A receiving device for receiving data in a wireless communication system, the receiving device comprising:

• a transceiver configured to transmit and receive a signal;
• and
• a controller coupled with the transceiver and configured to:
• receive a medium access control (MAC) protocol data unit (PDU) from a lower layer, and
• identify a MAC control element (CE) and a plurality of MAC service data units (SDUs) from the MAC PDU, wherein the MAC PDU includes a first MAC subheader for the MAC CE which is placed immediately in front of the MAC CE and a plurality of second MAC subheaders which is placed immediately in front of a corresponding MAC SDU from the plurality of MAC SDUs,
• wherein the MAC CE with the first MAC subheader is placed before the plurality of MAC SDUs in the MAC PDU.