Structure of MAC sub-header for supporting next 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 performed by a transmitting device in a wireless communication system, the method comprising:
generating, by a medium access control (MAC) layer, a MAC protocol data unit (PDU) including a MAC subheader for padding; and
delivering, by the MAC layer, the MAC PDU to a lower layer,
wherein, in case that a size for padding is 1 byte, the MAC subheader for padding is placed to be an end of the MAC PDU, and
wherein, in case that the size for padding is 2 or more bytes, 1 or more bytes of padding is placed to be the end of the MAC PDU and the MAC subheader for padding is placed immediately in front of the 1 or more bytes of padding.
2. The method of claim 1 , wherein a size of the MAC subheader for padding is 1 byte.
3. The method of claim 1 ,
wherein the MAC PDU further includes a MAC control element (CE) and a MAC subheader for the MAC CE, and
wherein the MAC subheader for the MAC CE is placed immediately in front of the MAC CE.
4. The method of claim 3 ,
wherein the MAC PDU further includes a MAC service data unit (SDU) and a MAC subheader for the MAC SDU, and
wherein the MAC subheader for the MAC SDU is placed immediately in front of the MAC SDU.
5. The method of claim 4 , wherein the MAC CE is placed after the MAC SDU and before the MAC subheader for padding.
6. The method of claim 5 , wherein the MAC PDU is delivered to the lower layer to be transmitted to a receiving device via the lower layer.
7. A method performed by a receiving device in a wireless communication system, the method comprising:
receiving, by a medium access control (MAC) layer, a MAC protocol data unit (PDU) from a lower layer; and
identifying, by the MAC layer, a MAC subheader for padding included in the MAC PDU,
wherein, in case that a size for padding is 1 byte, the MAC subheader for padding is placed to be an end of the MAC PDU, and
wherein, in case that the size for padding is 2 or more bytes, 1 or more bytes of padding is placed to be the end of the MAC PDU and the MAC subheader for padding is placed immediately in front of the 1 or more bytes of padding.
8. The method of claim 7 , wherein a size of the MAC subheader for padding is 1 byte.
9. The method of claim 7 ,
wherein the MAC PDU further includes a MAC control element (CE) and a MAC subheader for the MAC CE, and
wherein the MAC subheader for the MAC CE is placed immediately in front of the MAC CE.
10. The method of claim 9 ,
wherein the MAC PDU further includes a MAC service data unit (SDU) and a MAC subheader for the MAC SDU, and
wherein the MAC subheader for the MAC SDU is placed immediately in front of the MAC SDU.
11. The method of claim 10 , wherein the MAC CE is placed after the MAC SDU and before the MAC subheader for padding.
12. The method of claim 11 , wherein the MAC PDU is received from a transmitting device via the lower layer.
13. A transmitting device in a wireless communication system, the transmitting device comprising:
a transceiver; and
a controller implementing a plurality of layers including a medium access control (MAC) layer and a lower layer, the controller coupled with the transceiver and configured to:
generate, by the MAC layer, a MAC protocol data unit (PDU) including a MAC subheader for padding, and
deliver, by the MAC layer, the MAC PDU to the lower layer,
wherein, in case that a size for padding is 1 byte, the MAC subheader for padding is placed to be an end of the MAC PDU, and
wherein, in case that the size for padding is 2 or more bytes, 1 or more bytes of padding is placed to be the end of the MAC PDU and the MAC subheader for padding is placed immediately in front of the 1 or more bytes of padding.
14. The transmitting device of claim 13 , wherein a size of the MAC subheader for padding is 1 byte.
15. The transmitting device of claim 13 ,
wherein the MAC PDU further includes a MAC control element (CE) and a MAC subheader for the MAC CE, and
wherein the MAC subheader for the MAC CE is placed immediately in front of the MAC CE.
16. The transmitting device of claim 15 ,
wherein the MAC PDU further includes a MAC service data unit (SDU) and a MAC subheader for the MAC SDU, and
wherein the MAC subheader for the MAC SDU is placed immediately in front of the MAC SDU.
17. The transmitting device of claim 16 , wherein the MAC CE is placed after the MAC SDU and before the MAC subheader for padding.
18. The transmitting device of claim 17 , wherein the MAC PDU is delivered to the lower layer to be transmitted to a receiving device via the transceiver by the lower layer.
19. A receiving device in a wireless communication system, the receiving device comprising:
a transceiver; and
a controller implementing a plurality of layers including a medium access control (MAC) layer and a lower layer, the controller coupled with the transceiver and configured to:
receive, by the MAC layer, a MAC protocol data unit (PDU) from the lower layer, and
identify, by the MAC layer, a MAC subheader for padding included in the MAC PDU,
wherein, in case that a size for padding is 1 byte, the MAC subheader for padding is placed to be an end of the MAC PDU, and
wherein, in case that the size for padding is 2 or more bytes, 1 or more bytes of padding is placed to be the end of the MAC PDU and the MAC subheader for padding is placed immediately in front of the 1 or more bytes of padding.
20. The receiving device of claim 19 , wherein a size of the MAC subheader for padding is 1 byte.
21. The receiving device of claim 19 ,
wherein the MAC PDU further includes a MAC control element (CE) and a MAC subheader for the MAC CE, and
wherein the MAC subheader for the MAC CE is placed immediately in front of the MAC CE.
22. The receiving device of claim 21 ,
wherein the MAC PDU further includes a MAC service data unit (SDU) and a MAC subheader for the MAC SDU, and
wherein the MAC subheader for the MAC SDU is placed immediately in front of the MAC SDU.
23. The receiving device of claim 22 , wherein the MAC CE is placed after the MAC SDU and before the MAC subheader for padding.
24. The receiving device of claim 23 , wherein the MAC PDU is received from a transmitting device via the transceiver by the lower layer.