Radio link monitoring, beam recovery and radio link failure handling

Patent metadata

Field	Value
Publication number	US-2020067589-A1
Application number	US-201816487665-A
Country	US
Kind code	A1
Filing date	Mar 21, 2018
Priority date	Mar 23, 2017
Publication date	Feb 27, 2020
Grant date	—

Abstract

Apparatuses of wireless communication devices are disclosed. An apparatus of a user equipment includes one or more processors configured to start a first timer responsive to detection of a Radio Link (RL) failure, start a second timer and trigger a beam recovery procedure one or more times responsive to expiry of the first timer if RL recovery is not detected, and start a third timer and attempt to find a suitable cell for Radio Resource Control (RRC) connection reestablishment responsive to one or more expiries of the second timer if RL recovery fails. The one or more processors are also configured to go to an RRC idle or inactive state responsive to expiry of the third timer if a suitable cell for RRC connection reestablishment is not found.

First claim

1 - 20 . (canceled)

21 . An apparatus of a user equipment (UE), comprising:
a data storage device configured to store a value of a timer; and one or more processors operably coupled to the data storage device, the one or more processors configured to:
during a period based on the timer, perform measurements, in a physical layer, on beams corresponding to radio link monitoring (RLM) reference signal resources;
compare the measurements to a first threshold and a second threshold to determine a status of the beams as in-sync or out-of-sync; and;
inform, by the physical layer, a layer higher than the physical layer of the status of the beams.

22 . The apparatus of claim 21 , wherein the one or more processors are configured to, in the physical layer, determine the status of beams using a calculated Physical Downlink Control Channel (PDCCH) block error rate based on the measurements.

23 . The apparatus of claim 22 , wherein the one or more processors are configured to, in the physical layer, generate and inform an in-sync indication when the calculated PDCCH block error rate is lower than the first threshold.

24 . The apparatus of claim 22 , wherein the one or more processors are configured to, in the physical layer, generate and inform an out-of-sync indication when the calculated PDCCH block error rate is higher than the second threshold.

25 . The apparatus of claim 22 , wherein the one or more processors are configured to, in the physical layer, use a channel quality of a best measured beam among multiple beams that are configured in PDCCH block error rate calculations.

26 . A computer-readable medium including computer-readable instructions that, when executed by one or more processors, cause the one or more processors to:
perform measurements, in a physical layer of a user equipment (UE), on beams corresponding to radio link monitoring (RLM) reference signal resources; compare the measurements to a first threshold and a second threshold to determine a status of the beams as in-sync or out-of-sync; and inform a layer higher than the physical layer of the status of the beams.

27 . The computer-readable medium of claim 26 , wherein the computer-readable instructions, when executed, further cause the one or more processors to determine the status of beams using a calculated Physical Downlink Control Channel (PDCCH) block error rate based on the measurements.

28 . The computer-readable medium of claim 27 , wherein the computer-readable instructions, when executed, further cause the one or more processors to generate and inform an in-sync indication when the calculated PDCCH block error rate is lower than the first threshold.

29 . The computer-readable medium of claim 27 , wherein the computer-readable instructions, when executed, further cause the one or more processors to generate and inform an out-of-sync indication when the calculated PDCCH block error rate is higher than the second threshold.

30 . The computer-readable medium of claim 27 , wherein the computer-readable instructions, when executed, further cause the one or more processors to use a channel quality of a best measured beam among multiple beams that are configured in PDCCH block error rate calculations.

31 . An apparatus comprising means to:
perform measurements, in a physical layer of a user equipment (UE), on beams corresponding to radio link monitoring (RLM) reference signal resources; compare the measurements to a first threshold and a second threshold to determine a status of the beams as in-sync or out-of-sync; and inform, by the physical layer, a layer higher than the physical layer of the status of the beams.

32 . The apparatus of claim 31 , further comprising means to, in the physical layer, determine the status of beams using a calculated Physical Downlink Control Channel (PDCCH) block error rate based on the measurements.

33 . The apparatus of claim 32 , further comprising means to, in the physical layer, generate and inform an in-sync indication when the calculated PDCCH block error rate is lower than the first threshold.

34 . The apparatus of claim 32 , further comprising means to, in the physical layer, generate and inform an out-of-sync indication when the calculated PDCCH block error rate is higher than the second threshold.

35 . The apparatus of claim 32 , further comprising means to, in the physical layer, use a channel quality of a best measured beam among multiple beams that are configured in PDCCH block error rate calculations.

Assignees

• Intel Ip Corp

Inventors

• Jeong Kyeongin
• Yiu Candy
• Lee Dae Won
• Kwak Yongjun
• Ali Ansab
• Heo Youn Hyoung

Classifications

• H04W28/04

  Error control · CPC title

• H04B7/0617 Primary

  for beam forming · CPC title

• H04W76/19

  Connection re-establishment · CPC title

• H04W24/10

  Scheduling measurement reports {; Arrangements for measurement reports} · CPC title

• H04W72/042

  Electricity · mapped topic