Method for managing radio link in multi-carrier environment, and device for same
View Patent ↗A method for operating a terminal for radio link management includes: receiving from a first cell a connection reconfiguration message, for configuring carrier aggregation, including configuration information for a second cell; performing beam and radio link monitoring for the first and second cells; when a beam failure for the second cell is detected, performing at least one from among a procedure of reporting the beam failure to the first and second cells, a procedure of requesting the recovery of the beam failure from the first and second cells, and a beam recovery procedure for the second cell; receiving, from the first or second cell, a control message in response to the report of the beam failure, or in response to the beam recovery procedure; and, upon receiving the control message, determining whether the beam recovery procedure is successful.
1. An operation method of a terminal for beam management and radio link management, the operation method comprising:
receiving, from a first cell operating as a primary cell (PCell), a connection reconfiguration message for configuring a carrier aggregation function including configuration information for a second cell operating as a secondary cell (SCell);
performing beam monitoring operations for the first cell and the second cell and a radio link monitoring operation for the first cell;
in response to detecting a beam failure for the second cell, performing a procedure of a beam failure recovery for the second cell, and reporting the beam failure recovery to the first cell or the second cell; and
in response to detecting a radio link failure (RLF) for the first cell, re-establishing a radio link with a third cell, and performing a procedure of reporting the RLF to the third cell,
wherein the procedure of reporting the RLF to the third cell includes transmitting a RLF message to the third cell, the RLF message including an identifier of the first cell where the RLF occurred, location information of the terminal at a time of transmitting the RLF message, and information on a time elapsed after the occurrence of the RLF,
wherein the RLF message further includes information on whether a condition for performing a random access procedure for beam recovery is satisfied.
2. The operation method of claim 1 ,
wherein the RLF message is a radio resource control (RRC) layer message.
3. The operation method of claim 1 ,
wherein the random access procedure is a non-contention-based random access procedure.
4. The operation method of claim 1 ,
wherein the location information includes a latitude and/or a longitude of the terminal.
5. The operation method of claim 1 ,
wherein the procedure of reporting the beam failure recovery to the first cell includes transmitting a medium access control (MAC) message including at least one of information for identifying a failed beam, information on a time elapsed from the detection of the beam failure, and information on a time elapsed from the detection of the beam failure to completion of the beam failure recovery.
6. The operation method of claim 5 ,
wherein the information of identifying the failed beam is a transmission configuration indicator (TCI) state identifier or an identifier of a reference signal for beam monitoring.
7. The operation method of claim 5 ,
wherein the MAC message is a MAC control element (CE) message.
8. An operation method of a base station operating a first cell and a second cell, the first cell being a primary cell (PCell), and the operation method comprising:
transmitting, to a terminal, a connection reconfiguration message for configuring a carrier aggregation function including configuration information on the second cell operating as a secondary cell (SCell);
in response to detecting a beam failure for the second cell at the terminal, performing a procedure of receiving a report of a beam failure recovery from the terminal via the first cell or the second cell, the beam failure recovery being performed by the terminal for the second cell; and
in response to detecting a radio link failure (RLF) for the first cell at the terminal, performing a procedure of receiving a report of the RLF from the terminal via a third cell,
wherein the procedure of receiving the report of the RLF includes receiving a RLF message from the terminal via the third cell, the RLF message including an identifier of the first cell where the RLF occurred, location information of the terminal at a time of transmitting the RLF message, and information on a time elapsed after the occurrence of the RLF,
wherein the RLF message further includes information on whether a condition for performing a random access procedure for beam recovery is satisfied.
9. The operation method of claim 8 ,
wherein the RLF message is a radio resource control (RRC) layer message.
10. The operation method of claim 8 ,
wherein the random access procedure is a non-contention-based random access procedure.
11. The operation method of claim 8 ,
wherein the location information includes a latitude and/or a longitude of the terminal.
12. The operation method of claim 8 ,
wherein the procedure of receiving the report of the beam failure recovery includes receiving a medium access control (MAC) message including at least one of information for identifying a failed beam, information on a time elapsed from the detection of the beam failure, and information on a time elapsed from the detection of the beam failure to completion of the beam failure recovery.
13. The operation method of claim 12 ,
wherein the information of identifying the failed beam is a transmission configuration indicator (TCI) state identifier or an identifier of a reference signal for beam monitoring.
14. The operation method of claim 12 ,
wherein the MAC message is a MAC control element (CE) message.