Method for transmitting data in a communication system and device therefor
The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and a device for transmitting data in a wireless communication system. According to an aspect of the present invention, the method comprising: receiving, from an enhanced Node B (eNB), a grant with an indication that indicates at least one logical channel group (LCG) of which data should be transmitted using the received grant, wherein each of radio bearers (RBs) configured to the UE is associated with a respective logical channel priority; generating a medium access control protocol data unit (MAC PDU) including data of RBs belonging to the indicated at least one LCG; and transmitting the MAC PDU using the grant.
1. A method for a user equipment (UE) operating in a wireless communication system, the method comprising:
receiving, from a base station (BS), a grant with information that informs at least one logical channel group (LCG) of which data should be transmitted based on the received grant,
wherein each of radio bearers (RBs) configured to the UE is related to a respective logical channel priority;
based on the information, changing logical channel priorities of RBs related to the at least one LCG to be higher than logical channel priorities of RBs related to LCGs not informed by the information;
based on the logical channel priorities of the RBs related to the at least one LCG and the logical channel priorities of RBs related to LCGs not informed by the information, performing logical channel prioritization (LCP) for all RBs;
generating a medium access control protocol data unit (MAC PDU) based on the LCP; and
transmitting the MAC PDU using the grant.
2. The method according to claim 1 , wherein the LCP is performed in decreasing order of logical channel priorities of the RBs related to the at least one LCG.
3. The method according to claim 1 , further comprising:
changing prioritized bit rate (PBR) of the RBs related to the at least one LCG to infinity.
4. The method according to claim 1 , wherein the grant is an uplink grant used for the UE to transmit data to the BS via Uu interface or a sidelink grant used for the UE to transmit data to a related UE via a PC5 interface.
5. The method according to claim 1 , wherein the information is included in the grant or transmitted together with the grant.
6. A User Equipment (UE) for operating in a wireless communication system, the UE comprising:
a transceiver; and
a processor that:
receives, from a base station, BS, a grant with information that informs at least one logical channel group (LCG) of which data should be transmitted based on the received grant, wherein each of radio bearers (RBs) configured to the UE is related with a respective logical channel priority;
based on the information, changes logical channel priorities of RBs related to the at least one LCG to be higher than logical channel priorities of RBs related to LCGs not informed by the information;
based on the logical channel priorities of the RBs related to the at least one LCG and the logical channel priorities of RBs related to LCGs not informed by the information, performs logical channel prioritization (LCP) for all RBs;
generates a medium access control protocol data unit (MAC PDU) based on the LCP; and
control the transceiver to transmit the MAC PDU using the grant.
7. The UE according to claim 6 , wherein the LCP is performed in decreasing order of logical channel priorities of the RBs related to the at least one LCG.
8. The UE according to claim 6 , wherein the processor further changes prioritized bit rate (PBR) of the RBs related to the at least one LCG to infinity.
9. The UE according to claim 6 , wherein the grant is a uplink grant used for the UE to transmit data to the BS via Uu interface or a sidelink grant used for the UE to transmit data to a related UE via PC5 interface.
10. The UE according to claim 6 , wherein the information is included in the grant or transmitted together with the grant.