Method and apparatus for transmitting and receiving beam failure recovery request for secondary cell

A method performed by a base station in a wireless communication system, the method comprising:

• transmitting, to a terminal, information for beam failure recovery (BFR) on a secondary cell (SCell) including a list of reference signals identifying candidate beams for the BFR on the SCell and a reference signal received power (RSRP) threshold for determining a candidate beam;
• transmitting, to the terminal, a message comprising one or more scheduling request configurations, wherein each scheduling request configuration of the one or more scheduling request configurations comprises an identifier to indicate the respective scheduling request configuration of the one or more scheduling request configurations, and wherein the message comprises an identifier indicating a scheduling request configuration for the BFR on the SCell from the one or more scheduling request configurations;
• receiving, from the terminal, a scheduling request for the BFR on the SCell based on the scheduling request configuration for the BFR on the SCell;
• transmitting, to the terminal, an uplink grant corresponding to the scheduling request;
• and
• receiving, from the terminal, a BFR media access control (MAC) control element (CE) including a candidate beam availability indication, the candidate beam availability indication indicating whether at least one of the reference signals in the list with RSRP above the RSRP threshold is available,
• wherein logical channels are prioritized in accordance with following order of cell radio network temporary identifier (C-RNTI) MAC CE or data from uplink (UL)-common control channel (CCCH), the BFR MAC CE, a MAC CE for a buffer state report (BSR) with exception of a BSR included for padding, a single entry power headroom report (PHR) MAC CE or multiple entry PHR MAC CE, data from any logical channel except data from UL-CCCH, a MAC CE for recommended bit rate query, and a MAC CE for BSR included for padding, and
• wherein the BFR MAC CE and configured grant confirmation MAC CE have a same priority.

A terminal in a wireless communication system, the terminal comprising:

• a transceiver;
• and
• at least one processor operatively coupled with the transceiver and configured to:
• receive, from a base station, information for beam failure recovery (BFR) on a secondary cell (SCell) including a list of reference signals identifying candidate beams for the BFR on the SCell and a reference signal received power (RSRP) threshold for determining a candidate beam,
• receive, from the base station, a message comprising one or more scheduling request configurations, wherein each scheduling request configuration of the one or more scheduling request configurations comprises an identifier to indicate the respective scheduling request configuration of the one or more scheduling request configurations, and wherein the message further comprises an identifier indicating a scheduling request configuration for the BFR on the SCell from the one or more scheduling request configurations,
• in case that beam failure on the SCell is detected, transmit, to the base station, a scheduling request for the BFR on the SCell based on the scheduling request configuration for the BFR on the SCell,
• receive, from the base station, an uplink grant corresponding to the scheduling request,
• generate a BFR media access control (MAC) control element (CE) including a candidate beam availability indication, the candidate beam availability indication indicating whether at least one of the reference signals in the list with RSRP above the RSRP threshold is available, and
• transmit, to the base station, the generated BFR MAC CE,
• wherein logical channels are prioritized in accordance with following order of cell radio network temporary identifier (C-RNTI) MAC CE or data from uplink (UL)-common control channel (CCCH), the BFR MAC CE, a MAC CE for a buffer state report (BSR) with exception of a BSR included for padding, a single entry power headroom report (PHR) MAC CE or multiple entry PHR MAC CE, data from any logical channel except data from UL-CCCH, a MAC CE for recommended bit rate query, and a MAC CE for BSR included for padding, and
• wherein the BFR MAC CE and configured grant confirmation MAC CE have a same priority.

A base station in a wireless communication system, the base station comprising:

• a transceiver;
• and
• at least one processor operatively coupled with the transceiver and configured to:
• transmit, to a terminal, information for beam failure recovery (BFR) on a secondary cell (SCell) including a list of reference signals identifying candidate beams for the BFR on the SCell and a reference signal received power (RSRP) threshold for determining a candidate beam,
• transmit, to the terminal, a message comprising one or more scheduling request configurations, wherein each scheduling request configuration of the one or more scheduling request configurations comprises an identifier to indicate the respective scheduling request configuration of the one or more scheduling request configurations, and wherein the message further comprises an identifier indicating a scheduling request configuration for the BFR on the SCell from the one or more scheduling request configurations,
• receive, from the terminal, a scheduling request for the BFR on the SCell based on the scheduling request configuration for the BFR on the SCell,
• transmit, to the terminal, an uplink grant corresponding to the scheduling request, and
• receive, from the terminal, a BFR media access control (MAC) control element (CE) including a candidate beam availability indication, the candidate beam availability indication indicating whether at least one of the reference signals in the list with RSRP above the RSRP threshold is available,
• wherein logical channels are prioritized in accordance with following order of cell radio network temporary identifier (C-RNTI) MAC CE or data from uplink (UL)-common control channel (CCCH), the BFR MAC CE, a MAC CE for a buffer state report (BSR) with exception of a BSR included for padding, a single entry power headroom report (PHR) MAC CE or multiple entry PHR MAC CE, data from any logical channel except data from UL-CCCH, a MAC CE for recommended bit rate query, and a MAC CE for BSR included for padding, and
• wherein the BFR MAC CE and configured grant confirmation MAC CE have a same priority.