Beam failure recovery method, device, and apparatus

A user equipment (UE), comprising:

• a processor configured to read programs in a memory to perform the process of:
• determining whether beam failure recovery (BFR) is required;
• and
• a transceiver configured to receive and send data under control of the processor to perform the process of:
• performing the BFR by initiating a random access procedure on a selected Band Width Part (BWP) when determining that the BFR is required, wherein the BWP is not changed in the random access procedure;
• wherein said performing the BFR by initiating the random access procedure on the selected BWP, comprises:
• selecting a beam according to channel quality on a plurality of configured BWPs, and the BFR is performed by initiating the random access procedure on a BWP where the beam is located;
• wherein said selecting the beam according to channel quality on the plurality of configured BWPs, comprises:
• performing measurements on Synchronization Signal Blocks (SSBs) and/or Channel State Information Reference Signals (CSI-RSs) on the plurality of configured BWPs, wherein different SSBs or CSI-RSs correspond to different beams;
• and
• selecting a beam configured with contention free random access resource from beams that meet a channel quality requirement, and initiating the random access procedure on a BWP where the beam is located;
• when none of beams configured with contention free random access resource meets the channel quality requirement, selecting another beam that meets the channel quality requirement, and initiating the random access procedure on a BWP where the another beam is located.

A non-transitory computer readable storage medium, wherein, the computer readable storage medium stores computer programs configured to cause a processor to:

• determine that beam failure recovery (BFR) is required;
• and
• perform the BFR by initiating a random access procedure on a selected Band Width Part (BWP), wherein the BWP is not changed in the random access procedure;
• wherein said perform the BFR by initiating the random access procedure on the selected BWP, comprises:
• selecting a beam according to channel quality on a plurality of configured BWPs, and the BFR is performed by initiating the random access procedure on a BWP where the beam is located;
• wherein said selecting the beam according to channel quality on the plurality of configured BWPs, comprises:
• performing measurements on Synchronization Signal Blocks (SSBs) and/or Channel State Information Reference Signals (CSI-RSs) on the plurality of configured BWPs, wherein different SSBs or CSI-RSs correspond to different beams;
• and
• selecting a beam configured with contention free random access resource from beams that meet a channel quality requirement, and initiating the random access procedure on a BWP where the beam is located;
• when none of beams configured with contention free random access resource meets the channel quality requirement, selecting another beam that meets the channel quality requirement, and initiating the random access procedure on a BWP where the another beam is located.