Structure of MAC sub-header for supporting text generation mobile communication system and method and apparatus using the same
A communication technique of fusing a fifth generation (5G) communication system for supporting higher data transmission rate beyond a fourth generation (4G) system with an Internet of things (IoT) technology and a system thereof are provided. The communication technique may be used for an intelligent service (for example, a smart home, a smart building, a smart city, a smart car or a connected car, health care, digital education, a retail business, a security and safety related service, or the like) based on the 5G communication technology and the IoT related technology. A method for defining media access control (MAC) sub-header structures suitable for a next generation mobile communication system and applying the MAC sub-header structures to provide a high data transmission rate and a low latency in the next generation mobile communication system is provided.
1. A method for delivering data by a transmitting device in a wireless communication system, the method comprising:
obtaining a plurality of medium access control (MAC) service data units (SDUs) from an upper layer;
generating 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 each of a plurality of second MAC subheaders is placed immediately in front of a corresponding MAC SDU of the plurality of MAC SDUs; and
delivering 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.
2. The method of claim 1 , wherein the MAC CE with the first MAC subheader is placed before a padding in the MAC PDU.
3. The method of claim 2 , wherein the plurality of MAC SDUs are placed before the padding in the MAC PDU.
4. The method of claim 1 , wherein a second MAC subheader of the plurality of second MAC subheaders does not include a field indicating a length of a MAC SDU, in case that the MAC SDU is associated with a common control channel (CCCH).
5. The method of claim 1 , wherein a last MAC subheader of the plurality of second MAC subheaders includes a field indicating a length of a MAC SDU corresponding to the last MAC subheader.
6. 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 each of a plurality of second MAC subheaders is placed immediately in front of a corresponding MAC SDU of 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.
7. The transmitting device of claim 6 , wherein the MAC CE with the first MAC subheader is placed before a padding in the MAC PDU.
8. The transmitting device of claim 7 , wherein the plurality of MAC SDUs are placed before the padding in the MAC PDU.
9. The transmitting device of claim 6 , wherein a second MAC subheader of the plurality of second MAC subheaders does not include a field indicating a length of a MAC SDU, in case that the MAC SDU is associated with a common control channel (CCCH).
10. The transmitting device of claim 6 , wherein a last MAC subheader of the plurality of second MAC subheaders includes a field indicating a length of a MAC SDU corresponding to the last MAC subheader.
11. 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, each of which is placed immediately in front of a corresponding MAC SDU of 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.
12. The method of claim 11 , wherein the MAC CE with the first MAC subheader is placed before a padding in the MAC PDU.
13. The method of claim 12 , wherein the plurality of MAC SDUs are placed before the padding in the MAC PDU.
14. The method of claim 11 , wherein a second MAC subheader of the plurality of second MAC subheaders does not include a field indicating a length of a MAC SDU, in case that the MAC SDU is associated with a common control channel (CCCH).
15. The method of claim 11 , wherein a last MAC subheader of the plurality of second MAC subheaders includes a field indicating a length of a MAC SDU corresponding to the last MAC subheader.
16. 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, each of which is placed immediately in front of a corresponding MAC SDU of the plurality of MAC SDUs, and
wherein the MAC CE with the first MAC subheader is placed before the plurality of MAC SDUs in the MAC PDU.
17. The receiving device of claim 16 , wherein the MAC CE with the first MAC subheader is placed before a padding in the MAC PDU.
18. The receiving device of claim 17 , wherein the plurality of MAC SDUs are placed before the padding in the MAC PDU.
19. The receiving device of claim 16 , wherein a second MAC subheader of the plurality of second MAC subheaders does not include a field indicating a length of a MAC SDU, in case that the MAC SDU is associated with a common control channel (CCCH).
20. The receiving device of claim 16 , wherein a last MAC subheader of the plurality of second MAC subheaders includes a field indicating a length of a MAC SDU corresponding to the last MAC subheader.