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 transmitting device in a wireless communication system, the method comprising:
obtaining a radio link control (RLC) data unit from an upper layer;
generating an RLC protocol data unit (PDU) including an RLC header, wherein the RLC header includes a segmentation information (SI) field; and
delivering the RLC PDU to a lower layer,
wherein the SI field indicates whether the RLC PDU includes a complete RLC data unit which is the RLC data unit, a first segment of the RLC data unit, a middle segment of the RLC data unit or a last segment of the RLC data unit,
wherein whether the RLC header includes a segment offset (SO) field is determined based on a value of the SI field, and
wherein the SO field indicates a position of a segment of the RLC data unit within the RLC data unit.
2. The method of claim 1 , wherein the SI field is configured with 2 bits.
3. The method of claim 1 ,
wherein the RLC header includes the SO field, in case that the value indicates that the RLC PDU includes the middle segment of the RLC data unit or the last segment of the RLC data unit, and
wherein the RLC header does not include the SO field, in case that the value indicates that the RLC PDU includes the first segment of the RLC data unit or the complete RLC data unit.
4. The method of claim 1 , wherein the SO field indicates the position within the RLC data unit to which a first byte of the segment of the RLC data unit corresponds.
5. The method of claim 1 , further comprising:
generating another RLC PDU for a retransmission of the RLC data unit; and
delivering the another RLC PDU to the lower layer,
wherein an RLC header for the another RLC PDU includes a SI field, and
wherein whether the RLC header for the another RLC PDU includes a SO field is determined based on a value of the SI field of the RLC header for the another RLC PDU.
6. A transmitting device for delivering data in a wireless communication system, the transmitting device comprising:
a transceiver; and
at least one processor coupled with the transceiver and configured to:
obtain a radio link control (RLC) data unit from an upper layer,
generate an RLC protocol data unit (PDU) including an RLC header, the RLC header including a segmentation information (SI) field, and
deliver the RLC PDU to a lower layer,
wherein the SI field indicates whether the RLC PDU includes a complete RLC data unit which is the RLC data unit, a first segment of the RLC data unit, a middle segment of the RLC data unit or a last segment of the RLC data unit,
wherein whether the RLC header includes a segment offset (SO) field is determined based on a value of the SI field, and
wherein the SO field indicates a position of a segment of the RLC data unit within the RLC data unit.
7. The transmitting device of claim 6 , wherein the SI field is configured with 2 bits.
8. The transmitting device of claim 6 ,
wherein the RLC header includes the SO field, in case that the value indicates that the RLC PDU includes the middle segment of the RLC data unit or the last segment of the RLC data unit, and
wherein the RLC header does not include the SO field, in case that the value indicates that the RLC PDU includes the first segment of the RLC data unit or the complete RLC data unit.
9. The transmitting device of claim 6 , wherein the SO field indicates the position within the RLC data unit to which a first byte of the segment of the RLC data unit corresponds.
10. The transmitting device of claim 6 , wherein the at least one processor is further configured to:
generate another RLC PDU for a retransmission of the RLC data unit, and
deliver the another RLC PDU to the lower layer,
wherein an RLC header for the another RLC PDU includes a SI field, and
wherein whether the RLC header for the another RLC PDU includes a SO field is determined based on a value of the SI field of the RLC header for the another RLC PDU.
11. A method for receiving data by a receiving device in a wireless communication system, the method comprising:
receiving a radio link control (RLC) protocol data unit (PDU) from a lower layer; and
identifying an RLC header and an RLC data unit from the RLC PDU,
wherein the RLC header includes a segmentation information (SI) field,
wherein the SI field indicates whether the RLC PDU includes a complete RLC data unit which is the RLC data unit, a first segment of the RLC data unit, a middle segment of the RLC data unit or a last segment of the RLC data unit,
wherein whether the RLC header includes a segment offset (SO) field is determined based on a value of the SI field, and
wherein the SO field indicates a position of a segment of the RLC data unit within the RLC data unit.
12. The method of claim 11 , wherein the SI field is configured with 2 bits.
13. The method of claim 11 ,
wherein the RLC header includes the SO field, in case that the value indicates that the RLC PDU includes the middle segment of the RLC data unit or the last segment of the RLC data unit, and
wherein the RLC header does not include the SO field, in case that the value indicates that the RLC PDU includes the first segment of the RLC data unit or the complete RLC data unit.
14. The method of claim 11 , wherein the SO field indicates the position within the RLC data unit to which a first byte of the segment of the RLC data unit corresponds.
15. The method of claim 11 , further comprising receiving another RLC PDU for a retransmission of the RLC data unit,
wherein an RLC header for the another RLC PDU includes a SI field, and
wherein whether the RLC header for the another RLC PDU includes a SO field is determined based on a value of the SI field of the RLC header for the another RLC PDU.
16. A receiving device for receiving data in a wireless communication system, the receiving device comprising:
a transceiver; and
at least one processor coupled with the transceiver and configured to:
receive a radio link control (RLC) protocol data unit (PDU) from a lower layer, and
identify an RLC header and an RLC data unit from the RLC PDU,
wherein the RLC header includes a segmentation information (SI) field,
wherein the SI field indicates whether the RLC PDU includes a complete RLC data unit which is the RLC data unit, a first segment of the RLC data unit, a middle segment of the RLC data unit or a last segment of the RLC data unit,
wherein whether the RLC header includes a segment offset (SO) field is determined based on a value of the SI field, and
wherein the SO field indicates a position of a segment of the RLC data unit within the RLC data unit.
17. The receiving device of claim 16 , wherein the SI field is configured with 2 bits.
18. The receiving device of claim 16 ,
wherein the RLC header includes the SO field, in case that the value indicates that the RLC PDU includes the middle segment of the RLC data unit or the last segment of the RLC data unit, and
wherein the RLC header does not include the SO field, in case that the value indicates that the RLC PDU includes the first segment of the RLC data unit or the complete RLC data unit.
19. The receiving device of claim 16 , wherein the SO field indicates the position within the RLC data unit to which a first byte of the segment of the RLC data unit corresponds.
20. The receiving device of claim 16 ,
wherein the at least one processor is further configured to receive another RLC PDU for a retransmission of the RLC data unit,
wherein an RLC header for the another RLC PDU includes a SI field, and wherein whether the RLC header for the another RLC PDU includes a SO field is determined based on a value of the SI field of the RLC header for the another RLC PDU.