Link recovery and sidelink beamforming

Patent metadata

Field	Value
Publication number	US-2022399927-A1
Application number	US-202017776105-A
Country	US
Kind code	A1
Filing date	Nov 11, 2020
Priority date	Nov 11, 2019
Publication date	Dec 15, 2022
Grant date	—

Abstract

Methods, systems, and devices are used to implement BFR, SL-RS for BFD, radio link monitoring, or frequency assisted beam failure recovery, among other things.

First claim

1 . A first wireless transmit/receive unit (WTRU) that performs wireless communication comprising:
a processor; and a memory coupled with the processor, the memory comprising executable instructions stored thereon that when executed by the processor cause the processor to effectuate operations comprising:
communicating with a second WTRU;
counting a number of received negative-acknowledgement (NACK) feedbacks or no feedbacks from the second WTRU;
based on the number of received NACK feedbacks or no feedbacks exceeding a first threshold, sending a beam failure indication;
reporting a link quality indication that is below a quality threshold; and
based on the beam failure indication and the link quality indication that is below the quality threshold, transmitting a beam sweeping burst, wherein the beam sweeping burst is a composite of multiple blocks, wherein each block of the multiple blocks comprises physical sidelink shared channel (PSSCH).

2 . (canceled)

3 . (canceled)

4 . The first WTRU of claim 1 , the operations further comprising based on the beam failure indication and the link quality indication that is below the quality threshold, determining a threshold time window for a response from the second WTRU.

5 . The first WTRU of claim 1 , wherein the number of received no feedbacks from the second WTRU are consecutive no feedbacks from the second WTRU.

6 . (canceled)

7 . The first WTRU of claim 1 , the operations further comprising based on no beam failure indication,
determining a threshold time window associated with communicating with sidelink when transmitting data to the second WTRU.

8 . The first WTRU of claim 1 , wherein the number of received negative-acknowledgement (NACK) feedbacks or the second WTRU are consecutive received negative-acknowledgement (NACK) feedbacks from the second WTRU.

9 . A method associated with wireless transmission between wireless transmit/receive units (WTRUs), the method comprising
communicating, by a first WTRU with a second WTRU; counting a number of received negative-acknowledgement (NACK) feedbacks or no feedbacks from the second WTRU; based on the number of received NACK feedbacks or no feedbacks exceed a first threshold, sending a beam failure indication; reporting a link quality indication that is below a quality threshold; and based on the beam failure indication and the link quality indication that is below the quality threshold, transmitting a beam sweeping burst, wherein the beam sweeping burst is a composite of multiple blocks, wherein each block of the multiple blocks comprises physical sidelink shared channel (PSSCH).

10 . (canceled)

11 . (canceled)

12 . The method of claim 9 , further comprising based on receiving the beam failure indication and receiving the link quality indication that is below the quality threshold, determining a threshold time window for a response from the second WTRU.

13 . The method of claim 9 , wherein the number of received no feedbacks from the second WTRU are consecutive no feedbacks from the second WTRU.

14 . The method of claim 9 , further comprising based on no beam failure indication:
terminating link with the second WTRU or determining a threshold time window associated with communicating with sidelink when transmitting data to the second UE.

15 . The method of claim 9 , wherein the number of received negative-acknowledgement (NACK) feedbacks are consecutive received negative-acknowledgement (NACK) feedbacks from the second WTRU.

16 . A computer readable storage medium storing computer executable instructions that when executed by a computing device cause the computing device to effectuate operations comprising:
communicating, by a first wireless transmit/receive unit (WTRU), with a second WTRU; counting a number of received negative-acknowledgement (NACK) feedbacks or no feedbacks from the second WTRU; based on the number of received NACK feedbacks or no feedbacks exceeding a first threshold, sending a beam failure indication; reporting a link quality indication that is below a quality threshold; and based on the beam failure indication and the link quality indication that is below the quality threshold, transmitting a beam sweeping burst, wherein the beam sweeping burst is a composite of multiple blocks, wherein each block of the multiple blocks comprises physical sidelink shared channel (PSSCH).

17 . The computer readable storage medium of claim 15 , the operations further comprising based on the beam failure indication and the link quality indication that is below the quality threshold, determining a threshold time window for a response from the second WTRU.

18 . The computer readable storage medium of claim 15 , wherein the number of received no feedbacks from the second WTRU are consecutive no feedbacks from the second WTRU.

19 . The computer readable storage medium of claim 15 , the operations further comprising based on no beam failure indication,
determining a threshold time window associated with communicating with sidelink when transmitting data to the second WTRU.

20 . The computer readable storage medium of claim 15 , wherein the number of received negative-acknowledgement (NACK) feedbacks the second WTRU are consecutive received negative-acknowledgement (NACK) feedbacks from the second WTRU.

Assignees

• Interdigital Patent Holdings Inc

Inventors

• Tsai Yingming
• Li Yifan
• Svedman Patrick
• Awadin Mohamed
• Li Qing

Classifications

• H04B7/0623

  Auxiliary parameters, e.g. power control [PCB] or not acknowledged commands [NACK], used as feedback information · CPC title

• H04W74/02

  Hybrid access · CPC title

• H04B7/0617 Primary

  for beam forming · CPC title

• H04B7/0632

  Channel quality parameters, e.g. channel quality indicator [CQI] · CPC title

• H04W24/08

  Testing, {supervising or monitoring} using real traffic · CPC title