Beam failure recovery method and communication apparatus

A beam failure recovery method, wherein the method is applied to a network device, and the method comprises:

• receiving first information from a terminal device in a random access process, wherein the first information indicates information about available beams of N transmission reception points (TRPs) in M TRPs associated with a special cell (SpCell), each of the N TRPs corresponds to one available beam, and the random access process is a process triggered when the terminal device detects that a beam failure occurs on all the M TRPs, wherein 1<N≤M, and M and N are integers;
• and
• sending a random access response message to the terminal device based on the first information;
• wherein the receiving first information from a terminal device in a random access process comprises:
• receiving N preambles from the terminal device in the random access process, wherein the N preambles are in one-to-one correspondence with the available beams of the N TRPs.

A beam failure recovery apparatus, wherein the apparatus comprises:

• at least one processor;
• and
• a memory coupled to the at least one processor and configured to store executable instructions for execution by the at least one processor to instruct the at least one processor to:
• initiate a random access process when detecting that a beam failure occurs on all M transmission reception points (TRPs) associated with a special cell (SpCell);
• determine available beams of N TRPs in the M TRPs, wherein 1<N≤M, and M and N are integers;
• and
• send first information to a network device in the random access process, wherein the first information indicates information about the available beams of the N TRPs, and each of the N TRPs corresponds to one available beam;
• wherein the sending first information to a network device in the random access process comprises:
• sending N preambles to the network device in the random access process, wherein the N preambles are in one-to-one correspondence with the available beams of the N TRPs.

Abeam failure recovery apparatus, wherein the apparatus comprises:

• at least one processor;
• and
• a memory coupled to the at least one processor and configured to store executable instructions for execution by the at least one processor to instruct the at least one processor to:
• receive first information from a terminal device in a random access process, wherein the first information indicates information about available beams of N transmission reception points (TRPs) in M TRPs associated with a special cell (SpCell), each of the N TRPs corresponds to one available beam, and the random access process is a process triggered when the terminal device detects that a beam failure occurs on all the M TRPs, wherein 1<N≤M, and M and N are integers;
• and
• send a random access response message to the terminal device based on the first information;
• wherein the receiving first information from a terminal device in a random access process comprises:
• receiving N preambles from the terminal device in the random access process, wherein the N preambles are in one-to-one correspondence with the available beams of the N TRPs.