Method for reporting a radio link control re-transmission failure and a device therefor
AssigneeLG Electronics Inc.
InventorsSeungjune Yi, Sunyoung Lee, Sungjun Park
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Abstract
The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and a device for reporting an RLC (Radio Link Control) re-transmission failure in the wireless communication system, the method comprising: communicating with both the first BS and the second BS, wherein the first BS has a Radio Resource Control (RRC) connection with the UE; and reporting to the first BS, a Radio Link Control (RLC) retransmission error without RRC connection re-establishment for the first BS if the RLC retransmission error occurs in an RLC entity transmitting RLC PDU (Protocol Data Unit) to the second BS.
Claims6
A method for a user equipment (UE) operating in a wireless communication system supporting dual connectivity, the UE configured with a plurality of radio bearers (RBs) served by at least one of a master base station or a secondary base station, the method comprising:
- communicating with both the master base station and the secondary base station via at least a specific RB among the plurality of RBs, the specific RB served by both the master base station and the secondary base station,
- wherein the master base station and the secondary base station are connected via a non-ideal backhaul, and
- wherein the master base station has radio resource control (RRC) connection with the UE;
- detecting a radio link control (RLC) retransmission error that a maximum number of retransmissions is reached in an RLC entity of the UE, the RLC entity transmitting RLC protocol data units (PDUs) to the secondary base station;
- and
- upon the detecting the RLC retransmission error:
- indicating, to the master base station, the RLC retransmission error;
- and
- stopping transmission for all RBs including the specific RB,
- wherein the all RBs, including the specific RB, have RLC connection with the secondary BS, and
- wherein the specific RB has Packet Data Convergence Protocol (PDCP) connection with the master base station.
A user equipment (UE) configured to operate in a wireless communication system supporting dual connectivity, the UE configured with a plurality of radio bearers (RBs) served by at least one of a master base station or a secondary base station, the UE comprising:
- an RF (radio frequency) module including a transceiver;
- and
- a processor configured to control the RF module, wherein the processor is configured to:
- control the RF module to communicate with both the master base station and the secondary base station via at least a specific RB,
- wherein the master base station and the secondary base station are connected via a non-ideal backhaul, and
- wherein the master base station has radio resource control (RRC) connection with the UE;
- detect a radio link control (RLC) retransmission error that a maximum number of retransmissions is reached in an RLC entity of the UE, the RLC entity transmitting RLC protocol data units (PDUs) to the secondary base station;
- and
- upon the detecting the RLC retransmission error:
- indicate, to the master base station, the RLC retransmission error;
- and
- control the RF module to stop transmission for all RBs including the specific RB,
- wherein the all RBs, including the specific RB, have RLC connection with the secondary BS, and
- wherein the specific RB has Packet Data Convergence Protocol (PDCP) connection with the master base station.
Dependencies are inferred from the claim text.