Method and apparatus for beam failure recovery in communication system

A beam failure recovery method performed by a terminal in a communication system, the beam failure recovery method comprising:

• searching for a plurality of candidate beams when a beam failure is detected;
• transmitting a beam failure recovery request signal to a base station using a beam #1 among the plurality of candidate beams;
• receiving from the base station a beam failure recovery response signal including an uplink (UL) grant through the beam #1;
• and
• when a beam failure recovery procedure for the beam #1 succeeds, performing a multi-beam configuration procedure using the beam #1 which is a beam recovered by the beam failure recovery procedure,
• wherein the performing of the multi-beam configuration procedure comprises:
• transmitting to the base station multi-beam configuration information including index(es) of one or more beams excluding the beam #1 among the plurality of candidate beams, by using a resource indicated by the UL grant and the beam #1.

A beam failure recovery method performed by a terminal in a communication system, the beam failure recovery method comprising:

• searching for a plurality of candidate beams when a beam failure is detected;
• transmitting a first beam failure recovery request signal to a base station using a beam #1 among the plurality of candidate beams;
• receiving from the base station a first beam failure recovery response signal that is a response to the first beam failure recovery request signal through the beam #1;
• when a beam failure recovery procedure for the beam #1 succeeds, performing a multi-beam configuration procedure for a beam #2 among the plurality of candidate beams;
• and
• performing communication with the base station using multi-beam including the beam #1 and the beam #2,
• wherein the performing of the multi-beam configuration procedure comprises:
• transmitting a second beam failure recovery request signal to the base station using the beam #2 among the plurality of candidate beams;
• and
• receiving from the base station a second beam failure recovery response signal that is a response to the second beam failure recovery request signal through the beam #2.