Wireless device, second node, and methods performed thereby for handling a failure in a secondary cell serving the wireless device

Patent metadata

Field	Value
Publication number	US-2021195444-A1
Application number	US-201816318983-A
Country	US
Kind code	A1
Filing date	Sep 27, 2018
Priority date	Sep 28, 2017
Publication date	Jun 24, 2021
Grant date	—

Abstract

A method, performed by a wireless device is described. The method is for handling a failure in a secondary cell serving the wireless device. The secondary cell and a primary cell serve the wireless device with carrier aggregation (CA) in a wireless communications network. The wireless device determines the failure in the secondary cell. The determination is based on a determination of a radio link control failure. The wireless device initiates sending an indication to a network node. The network node is one of a first network node and a second network node. The indication is based on the determined failure of the secondary cell. A method, performed by the network node is also described. The network node receives the indication and initiates a second procedure.

First claim

1 . A method, performed by a wireless device, for handling a failure in a secondary cell serving the wireless device, wherein the secondary cell and a primary cell serve the wireless device with carrier aggregation, CA, in a wireless communications network, the method comprising:
determining the failure in the secondary cell, the determination being based on a determination of a radio link control failure, and initiating sending an indication to a network node, being one of a first network node and a second network node, the indication being based on the determined failure of the secondary cell.

2 . The method according to claim 1 , wherein the determining is based on one or more criteria, the one or more criteria being based on at least one of:
a. whether or not duplication is configured and/or applied; and b. whether or not Dual Connectivity, DC, is applied.

3 . The method according to claim 2 , wherein the wireless device is not operating in DC mode, and wherein after determining the failure in the secondary cell, the wireless device sends the indication, comprising a failure report, to the first network node, the first network node being a serving network node of the wireless device.

4 . The method according to claim 2 , wherein the wireless device is operating in DC mode, and wherein after detecting the failure in the secondary cell, wherein the secondary cell belongs to the first group of cells, the first group of cells being a Master Cell Group, MCG, the wireless device sends the indication comprising a failure report to the first network node, the first network node being a master node and a serving network node of the wireless device.

5 . The method according to claim 2 , wherein the wireless device is operating in DC mode, and wherein after detecting the failure in the secondary cell wherein the secondary cell belongs to the second group of cells, the second group of cells being a Secondary Cell Group, SCG, the wireless device sends the indication comprising a failure report to the second network node, the second network node being a secondary node and a serving network node of the wireless device.

6 . The method according to claim 5 , wherein the secondary cell is not a Primary Secondary Cell, PSCell.

7 . The method according to claim 1 , wherein the indication comprises information indicating the secondary cell where the radio link control failure has been detected.

8 . The method according to claim 7 , wherein the information indicating the secondary cell is a cell index of the secondary cell or an identity of a failed logical channel that was associated with the secondary cell.

9 . The method according to claim 2 , wherein the wireless device is operating in DC mode, and wherein after detecting the failure in the secondary cell, wherein the secondary cell belongs to the second group of cells, the second group of cells being a Secondary Cell Group, SCG, the wireless device sends the indication comprising a failure report to the first network node, the first network node being a master node and a serving network node of the wireless device.

10 . The method according to claim 9 , wherein the secondary cell is a Primary Secondary Cell, PSCell.

11 . The method according to claim 10 , wherein the failure report is an SCG failure information report.

12 . The method according to claim 1 , wherein method further comprises:
initiating a first procedure based on the determined failure, the first procedure being at least one of:
i. a suspension of a radio link control entity related to the failed radio link control, or failed secondary cell; or
ii. a deactivation of the duplication via the secondary cell where the radio link control failure has occurred.

13 . A method, performed by a network node, for handling a failure in a secondary cell, the network node being one of a first network node and a second network node, wherein the secondary cell and a primary cell serve a wireless device with carrier aggregation, CA, in a wireless communications network, the method comprising:
receiving an indication from the wireless device, the indication being based on a determined failure of the secondary cell, wherein the determination of the failure in the secondary cell is based on a determination of a radio link control failure, and initiating a second procedure based on the received indication, the second procedure comprising releasing of the secondary cell.

14 . The method according to claim 13 , wherein the wireless device is not operating in DC mode, wherein the network node is a serving network node of the wireless device, and wherein the network node receives the indication comprising a failure report.

15 . The method according to claim 13 , wherein the wireless device is operating in DC mode, wherein the network node is a master node and a serving network node of the wireless device, wherein the secondary cell belongs to a first group of cells, the first group of cells being a Master Cell Group, MSG, and wherein the network node receives the indication comprising a failure report.

16 . The method according to claim 13 , wherein the wireless device is operating in DC mode, wherein the network node is the second network node, the second network node being a secondary node and a serving network node of the wireless device, wherein the secondary cell belongs to a second group of cells, the second group of cells being a Secondary Cell Group, SCG, and wherein the second network node receives the indication comprising a failure report.

17 .- 22 . (canceled)

23 . A wireless device configured to handle a failure in a secondary cell configured to serve the wireless device, wherein the secondary cell and a primary cell are configured to serve the wireless device with carrier aggregation, CA, in a wireless communications network, the wireless device being further configured to:
determine the failure in the secondary cell, the determination being configured to be based on a determination of a radio link control failure, and initiate sending an indication to a network node, the network node being configured to be one of a first network node and a second network node, the indication being configured to be based on the failure of the secondary cell configured to be determined.

24 . The wireless device according to claim 23 , wherein to determine is configured to be based on one or more criteria, the one or more criteria being configured to be based on at least one of:
c. whether or not duplication is configured and/or applied; and d. whether or not Dual Connectivity, DC, is applied.

25 . The wireless device according to claim 24 , wherein the wireless device is configured to, where the wireless device is configured to not be operating in DC mode, and after determining the failure in the secondary cell:
send the indication, comprising a failure report, to the first network node, the first network node being configured to be a serving network node of the wireless device.

26 . The wireless device according to claim 24 , wherein the wireless device is configured to, where the wireless device is configured to be operating in DC mode, and after detecting the failure in the secondary cell, where the secondary cell is configured to belong to the first group of cells, the first group of cells being configured to be a Master Cell Group, MCG:
send the indication comprising a failure report to the first network node, the first network node being configured to be a master node and a serving net

Assignees

• Ericsson Telefon Ab L M

Inventors

• Teyeb Oumer
• Dudda Torsten
• Orsino Antonino
• Yilmaz Osman Nuri Can

Classifications

• H04W76/15

  Setup of multiple wireless link connections · CPC title

• H04W24/04 Primary

  Arrangements for maintaining operational condition · CPC title

• H04W88/02

  Terminal devices · CPC title

• H04W76/34 Primary

  Selective release of ongoing connections · CPC title

• H04W88/08

  Access point devices · CPC title