Secondary cell recovery for secondary cell groups

Patent metadata

Field	Value
Publication number	US-2020145083-A1
Application number	US-201916660586-A
Country	US
Kind code	A1
Filing date	Oct 22, 2019
Priority date	Nov 2, 2018
Publication date	May 7, 2020
Grant date	—

Abstract

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may receive, from a base station, information identifying a secondary cell group including a plurality of secondary cells. The user equipment may perform, after detecting a beam failure with a secondary cell of the secondary cell group, a beam failure recovery action associated with the secondary cell group. Numerous other aspects are provided.

First claim

What is claimed is:

1 . A method of wireless communication performed by a user equipment (UE), comprising:
receiving, from a base station, information identifying a secondary cell group including a plurality of secondary cells; and performing, after detecting a beam failure with a secondary cell of the secondary cell group, a beam failure recovery action associated with the secondary cell group.

2 . The method of claim 1 , wherein the beam failure recovery action comprises transmitting a scheduling request to a primary cell.

3 . The method of claim 1 , wherein the beam failure recovery action comprises transmitting a random access channel (RACH) message associated with a beam different from a beam for which the beam failure is detected.

4 . The method of claim 1 , wherein the beam failure recovery action is associated with more than one secondary cell from the secondary cell group.

5 . The method of claim 1 , wherein performing the beam failure recovery action comprises at least one of:
stopping monitoring of control-resource sets associated with the secondary cell group, monitoring a control-resource set associated with another secondary cell, of the plurality of secondary cells, not included in the secondary cell group, stopping transmission of uplink traffic using two or more secondary cells of the secondary cell group, or a combination thereof.

6 . The method of claim 5 , wherein the uplink traffic is periodic traffic.

7 . The method of claim 5 , wherein the uplink traffic is related to a configured grant for at least one secondary cell of the secondary cell group.

8 . The method of claim 1 , wherein the beam failure is a downlink beam failure, and the beam failure recovery action relates to an uplink beam.

9 . The method of claim 1 , wherein the beam failure is an uplink beam failure, and the beam failure recovery action relates to a downlink beam.

10 . The method of claim 1 , wherein secondary cells of the secondary cell group use a common beam for uplink and downlink.

11 . The method of claim 1 , wherein secondary cells of the secondary cell group use a common analog beam for respective carriers.

12 . The method of claim 1 , wherein the plurality of secondary cells of the secondary cell group share an analog beamformer.

13 . A method of wireless communication performed by a base station (BS), comprising:
receiving, from a user equipment (UE), information triggering a beam failure recovery action for a beam failure for a secondary cell group that includes the BS; and forgoing transmission on a downlink to the UE based at least in part on the information triggering the beam failure recovery action for the secondary cell group that includes the BS.

14 . The method of claim 13 , further comprising:
transmitting, before the beam failure, an indication of the secondary cell group to the UE.

15 . The method of claim 13 , wherein secondary cells of the secondary cell group use a common beam for uplink and downlink.

16 . The method of claim 13 , wherein secondary cells of the secondary cell group use a common analog beam for respective carriers.

17 . The method of claim 13 , wherein secondary cells of the secondary cell group share an analog beamformer.

18 . A user equipment (UE), comprising:
a memory; and one or more processors coupled to the memory, the memory and the one or more processors configured to:
receive, from a base station, information identifying a secondary cell group including a plurality of secondary cells; and
perform, after detecting a beam failure with a secondary cell of the secondary cell group, a beam failure recovery action associated with the secondary cell group.

19 . The UE of claim 18 , wherein the one or more processors, when performing the beam failure recovery action, are to:
transmit a scheduling request to a primary cell.

20 . The UE of claim 18 , wherein the one or more processors, when performing the beam failure recovery action, are to:
transmit a random access channel (RACH) message or associated with a beam different from a beam for which the beam failure is detected.

21 . The UE of claim 18 , wherein the beam failure recovery action is associated with more than one secondary cell from the secondary cell group.

22 . The UE of claim 18 , wherein the one or more processors, when performing the beam failure recovery action, are to:
stop monitoring of control-resource sets associated with the secondary cell group, monitor a control-resource set associated with another secondary cell, of the plurality of secondary cells, not included in the secondary cell group, stop transmission of uplink traffic using two or more secondary cells of the secondary cell group, or a combination thereof.

23 . The UE of claim 22 , wherein the uplink traffic is periodic traffic.

24 . The UE of claim 22 , wherein the uplink traffic is related to a configured grant for at least one secondary cell of the secondary cell group.

25 . The UE of claim 18 , wherein the beam failure is a downlink beam failure, and the beam failure recovery action relates to an uplink beam.

26 . The UE of claim 18 , wherein the beam failure is an uplink beam failure, and the beam failure recovery action relates to a downlink beam.

27 . A base station (BS), comprising:
a memory; and one or more processors coupled to the memory, the memory and the one or more processors configured to:
receive, from a user equipment (UE), information triggering a beam failure recovery action for a beam failure for a secondary cell group that includes the BS; and
forgo transmission on a downlink to the UE based at least in part on the information triggering the beam failure recovery action for the secondary cell group that includes the BS.

28 . The BS of claim 27 , wherein the one or more processors are further to:
transmit, before the beam failure, an indication of the secondary cell group to the UE.

29 . The BS of claim 27 , wherein secondary cells of the secondary cell group use a common beam for uplink and downlink.

30 . The BS of claim 27 , wherein secondary cells of the secondary cell group use a common analog beam for respective carriers.

Assignees

• Qualcomm Inc

Inventors

• John Wilson Makesh Pravin
• Luo Tao
• Venugopal Kiran
• Zhou Yan
• Ryu Jung Ho
• Bai Tianyang

Classifications

• H04W74/08

  Non-scheduled access, e.g. ALOHA (hybrid access H04W74/02) · CPC title

• H04W88/10

  adapted for operation in multiple networks, e.g. multi-mode access points · CPC title

• H04W76/19 Primary

  Connection re-establishment · CPC title

• H04W24/08

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

• H04W88/06

  adapted for operation in multiple networks {or having at least two operational modes}, e.g. multi-mode terminals · CPC title