Handling failure of a subset of serving beam pair links

A network device, comprising:

• a processor, a receiver and a transmitter, and the network device is configured to:
• receive a beam report from a client device through a non-contention-based channel, wherein the beam report indicates at least one failed downlink (DL) beam pair link (BPL) of monitored serving DL BPLs, wherein the at least one failed DL BPL comprises a subset of the monitored serving DL BPLs;
• and
• remove the at least one failed DL BPL from a list, wherein the list comprises serving DL BPLs of the client device,
• wherein the beam report is received using an uplink (UL) BPL corresponding to an available serving DL BPL for the client device, and
• wherein the beam report is received periodically when the at least one failed DL BPL is detected after transmitting of the latest beam report with surpassing a predetermined threshold time, and
• the beam report is received as a response to detecting the at least one failed DL BPL when the at least one failed DL BPL is detected within the predetermined threshold time after transmitting of the latest beam report.

A method for handling failure of a subset of serving beam pair links in wireless radio communication, comprising:

• monitoring, independently, a link quality of each serving downlink (DL) beam pair link (BPL) of a client device;
• detecting at least one failed DL BPL based on the monitoring, wherein the at least one failed DL BPL is a subset of the monitored serving DL BPLs;
• choosing an uplink (UL) BPL, wherein the chosen UL BPL corresponds to an available serving DL BPL of the monitored serving DL BPLs;
• and
• transmitting a beam report within a predetermined time period from the detection through a non-contention-based channel using the chosen UL BPL, wherein the beam report indicates the at least one failed DL BPL,
• wherein the client device transmits the beam report periodically when the at least one failed DL BPL is detected after transmitting of the latest beam report with surpassing a predetermined threshold time, and
• the client device transmits the beam report as a response to detecting the at least one failed DL BPL when the at least one failed DL BPL is detected within the predetermined threshold time after transmitting of the latest beam report.