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 for delivering data by a terminal in a wireless communication system, the method comprising:
obtaining a medium access control (MAC) service data unit (SDU) from an upper layer;
generating a MAC protocol data unit (PDU) including the MAC SDU and a MAC control element (CE), wherein a first MAC subheader for the MAC SDU is placed immediately in front of the MAC SDU and a second MAC subheader for the MAC CE is placed immediately in front of the MAC CE; and
delivering the MAC PDU to a lower layer,
wherein the MAC CE with the second MAC subheader is placed after at least one MAC SDU in the MAC PDU.
2. The method of claim 1 , wherein the MAC CE with the second MAC subheader is placed before a padding in the MAC PDU.
3. The method of claim 1 , wherein the first MAC subheader for the MAC SDU does not include a field indicating a length of the MAC SDU in case that the MAC SDU is associated with a common control channel (CCCH).
4. The method of claim 1 , wherein a last MAC subheader in the MAC PDU includes a field indicating a length of a MAC SDU or a MAC CE corresponding to the last MAC subheader.
5. A terminal for delivering data in a wireless communication system, the terminal comprising:
a transceiver; and
at least one processor configured to:
obtain a medium access control (MAC) service data unit (SDU) from an upper layer,
generate a MAC protocol data unit (PDU) including the MAC SDU and a MAC control element (CE), wherein a first MAC subheader for the MAC SDU is placed immediately in front of the MAC SDU and a second MAC subheader for the MAC CE is placed immediately in front of the MAC CE, and
deliver the MAC PDU to a lower layer,
wherein the MAC CE with the second MAC subheader is placed after at least one MAC SDU in the MAC PDU.
6. The terminal of claim 5 , wherein the MAC CE with the second MAC subheader is placed before a padding in the MAC PDU.
7. The terminal of claim 5 , wherein the first MAC subheader for the MAC SDU does not include a field indicating a length of the MAC SDU in case that the MAC SDU is associated with a common control channel (CCCH).
8. The terminal of claim 5 , wherein a last MAC subheader in the MAC PDU includes a field indicating a length of a MAC SDU or a MAC CE corresponding to the last MAC subheader.
9. A method for receiving data by a base station 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 service data unit (SDU) and a MAC control element (CE) from the MAC PDU, the MAC PDU including a first MAC subheader for the MAC SDU which is placed immediately in front of the MAC SDU and a second MAC subheader for the MAC CE which is placed immediately in front of the MAC CE,
wherein the MAC CE with the second MAC subheader is placed after at least one MAC SDU in the MAC PDU.
10. The method of claim 9 , wherein the MAC CE with the second MAC subheader is placed before a padding in the MAC PDU.
11. The method of claim 9 , wherein the first MAC subheader for the MAC SDU does not include a field indicating a length of the MAC SDU in case that the MAC SDU is associated with a common control channel (CCCH).
12. The method of claim 9 , wherein a last MAC subheader in the MAC PDU includes a field indicating a length of a MAC SDU or a MAC CE corresponding to the last MAC subheader.
13. A base station for receiving data in a wireless communication system, the base station comprising:
a transceiver; and
at least one processor configured to:
receive a medium access control (MAC) protocol data unit (PDU) from a lower layer, and
identify a MAC service data unit (SDU) and a MAC control element (CE) from the MAC PDU, the MAC PDU including a first MAC subheader for the MAC SDU which is placed immediately in front of the MAC SDU and a second MAC subheader for the MAC CE which is placed immediately in front of the MAC CE,
wherein the MAC CE with the second MAC subheader is placed after at least one MAC SDU in the MAC PDU.
14. The base station of claim 13 , wherein the MAC CE with the second MAC subheader is placed before a padding in the MAC PDU.
15. The base station of claim 13 , wherein the first MAC subheader for the MAC SDU does not include a field indicating a length of the MAC SDU in case that the MAC SDU is associated with a common control channel (CCCH).
16. The base station of claim 13 , wherein a last MAC subheader in the MAC PDU includes a field indicating a length of a MAC SDU or a MAC CE corresponding to the last MAC subheader.