Method and device for transmitting data unit
In the present invention, if a transmitting device receives an activation command for a packet duplication function of a PDCP entity for a radio bearer (RB), the PDCP entity submits a PDCP protocol data unit (PDU) to each of multiple lower layer entities associated with the PDCP entity, and each of the multiple lower layer entities transmits the PDCP PDU. If the transmitting device receives a deactivation command for the packet duplication function, the PDCP entity submits the PDCP PDU to a single one of the multiple lower layer entities, and the single one of the multiple lower layer entities transmits the PDCP PDU.
1. A method for transmitting, by a transmitting device, data units in wireless communication system, the method comprising:
receiving, by the transmitting device, radio bearer (RB) configuration information for a RB, the RB configuration information including configuration information for a packet data convergence protocol (PDCP) entity and multiple lower layer entities associated with the PDCP entity;
if receiving, by the transmitting device, an activation command for a packet duplication function of the PDCP entity for the RB,
submitting, at the PDCP entity, a PDCP protocol data unit (PDU) to each of the multiple lower layer entities; and
transmitting, by each of the multiple lower layer entities, the PDCP PDU, and
if receiving, by the transmitting device, a deactivation command for the packet duplication function,
submitting, at the PDCP entity, the PDCP PDU to a single one of the multiple lower layer entities; and
transmitting, by the single one of the multiple lower layer entities, the PDCP PDU.
2. The method according to claim 1 ,
wherein the transmitting device is a user equipment.
3. The method according to claim 1 ,
wherein the activation or deactivation command is received from a receiving device.
4. The method according to claim 3 ,
wherein the receiving device is a base station or another user equipment.
5. The method according to claim 1 ,
wherein the RB configuration information includes information indicating to which lower layer entity the PDCP entity transmits the PDCP PDU, and
wherein the PDCP entity submits the PDCP PDU to only the lower layer entity indicated by the information when the packet duplication function of the PDCP entity for the RB is not activated.
6. The method according to claim 1 ,
wherein the deactivation command includes information indicating to which lower layer entity the PDCP entity transmits the PDCP PDU, and
wherein the PDCP entity submits the PDCP PDU to only the lower layer entity indicated by the deactivation command.
7. The method according to claim 1 ,
wherein each of the multiple lower layer entities is a radio link control (RLC) or an LTE-WLAN aggregated adaptation protocol (LWAAP) entity.
8. The method according to claim 1 ,
wherein the activation or deactivation command is received using a medium access control (MAC) control element (CE).
9. A transmitting device for transmitting data units in wireless communication system, the transmitting device comprising:
a transceiver, and
a processor configured to control the transceiver, the processor configured to:
control the transceiver to receive radio bearer (RB) configuration information for a RB, the RB configuration information including configuration information for a packet data convergence protocol (PDCP) entity and multiple lower layer entities associated with the PDCP entity;
when the transmitting device receives an activation command for a packet duplication function of the PDCP entity for the RB,
submit, at the PDCP entity, a PDCP protocol data unit (PDU) to each of the multiple lower layer entities; and
control the transceiver to transmit, from each of the multiple lower layer entities, the PDCP PDU, and
when the transmitting device receives a deactivation command for the packet duplication function,
submit, at the PDCP entity, the PDCP PDU to a single one of the multiple lower layer entities; and
control the transceiver to transmit, from the single one of the multiple lower layer entities, the PDCP PDU.
10. The transmitting device according to claim 9 ,
wherein the transmitting device is a user equipment.
11. The transmitting device according to claim 9 ,
wherein the activation or deactivation command is received from a receiving device.
12. The transmitting device according to claim 11 ,
wherein the receiving device is a base station or another user equipment.
13. The transmitting device according to claim 9 ,
wherein the RB configuration information includes information indicating to which lower layer entity the PDCP entity transmits the PDCP PDU, and
wherein the processor is configured to submit, at the PDCP entity, the PDCP PDU to only the lower layer entity indicated by the information when the packet duplication function of the PDCP entity for the RB is not activated.
14. The transmitting device according to claim 9 ,
wherein the deactivation command includes information indicating to which lower layer entity the PDCP entity transmits the PDCP PDU, and
wherein the processor is configured to submit, at the PDCP entity, the PDCP PDU to only the lower layer entity indicated by the deactivation command.
15. The transmitting device according to claim 9 ,
wherein each of the multiple lower layer entities is a radio link control (RLC) or an LTE-WLAN aggregated adaptation protocol (LWAAP) entity.
16. The transmitting device according to claim 9 ,
wherein the activation or deactivation command is received using a medium access control (MAC) control element (CE).