Signaling radio bearer type 3 (srb3) and secondary cell group (scg) failure handling

Patent metadata

Field	Value
Publication number	US-2020404725-A1
Application number	US-202016996102-A
Country	US
Kind code	A1
Filing date	Aug 18, 2020
Priority date	Sep 28, 2017
Publication date	Dec 24, 2020
Grant date	—

Abstract

A user equipment (UE) can include processing circuitry configuring the UE for Dual Connectivity (DC) with a Master Node-B (MN) and a Secondary Node-B (SN). The processing circuitry is to decode connection reconfiguration information received from the MN. The connection reconfiguration information includes signaling radio bearer type 3 (SRB3) configuration information. The SRB3 configuration information originating from the SN and configuring a SRB3, where the SRB3 is for direct communication between the UE and the SN. At least one of a radio resource control (RRC) reconfiguration completion message or a measurement report message is encoded for transmission to the SN.

First claim

1 - 21 . (canceled)

22 . An apparatus of comprising:
one or more processors, wherein the one or more processors are configured to cause a master node (MN) to:
receive signaling radio bearer type 3 (SRB3) configuration information from a secondary node (SN), the SRB3 for direct communication between a user equipment device (UE) and the SN;
provide connection reconfiguration information to the UE, the connection reconfiguration information including the SRB3;
after providing the connection reconfiguration information to the UE, providing second connection reconfiguration information, wherein the second connection reconfiguration information includes signaling to release the SRB3.

23 . The apparatus of claim 22 , wherein said providing the second connection reconfiguration is performed after the UE provides a radio resource control (RRC) reconfiguration completion message to the SN.

24 . The apparatus of claim 22 , wherein said providing the second connection reconfiguration is performed after the UE provides a measurement report message to the SN.

25 . The apparatus of claim 22 , wherein the SRB3 configuration information is a Radio Bearer Configuration information element.

26 . The apparatus of claim 22 , wherein the second connection reconfiguration information includes signaling radio bearer release flag, wherein in response to the signaling radio bearer release flag, the UE is configured to release a packet data convergence protocol (PDCP) entity of the SRB3.

27 . The apparatus of claim 22 , wherein the one or more processors are further configured to:
receive a notification message from the UE notifying of failure a secondary cell group (SCG) of the SN.

28 . The apparatus of claim 27 , wherein the notification message includes a failure type for the failure.

29 . The apparatus of claim 27 , wherein the notification message further includes a transaction ID of a last processed RRC message prior to detecting the SCG failure.

30 . The apparatus of claim 27 , wherein the notification message further includes measurements associated with the SCG.

31 . A method for operating a cellular network including a master node (MN) and a secondary node (SN), comprising:
providing, by the SN, signaling radio bearer type 3 (SRB3) configuration information to the MN, the SRB3 for direct communication between a user equipment device (UE) and the SN; providing, by the MN, connection reconfiguration information to the UE, the connection reconfiguration information including the SRB3; after providing the connection reconfiguration information to the UE, providing, by the MN, second connection reconfiguration information, wherein the second connection reconfiguration information includes signaling to release the SRB3.

32 . The method of claim 31 , wherein said providing the second connection reconfiguration is performed in response to:
receiving, at the SN, a radio resource control (RRC) reconfiguration completion message from the UE.

33 . The method of claim 31 , wherein said providing the second connection reconfiguration is performed in response to:
receiving, at the SN, a measurement report message from the UE.

34 . The method of claim 31 , wherein the SRB3 configuration information is a Radio Bearer Configuration information element.

35 . The method of claim 31 , wherein the second connection reconfiguration information includes signaling radio bearer release flag, wherein in response to the signaling radio bearer release flag, the UE is configured to release a packet data convergence protocol (PDCP) entity of the SRB3.

36 . The method of claim 31 , further comprising:
receiving a notification message from the UE indicating failure a secondary cell group (SCG) of the SN.

37 . The method of claim 36 , wherein the notification message further includes a transaction ID of a last processed RRC message prior to detecting the SCG failure.

38 . A non-transitory computer-readable storage medium that stores instructions for execution by one or more processors of a master node (MN), the instructions to configure the one or more processors to cause the MN to:
receive signaling radio bearer type 3 (SRB3) configuration information from a secondary node (SN), the SRB3 for direct communication between a user equipment device WE) and the SN; provide connection reconfiguration information to the LE, the connection reconfiguration information including the SRB3; after providing the connection reconfiguration information to the UE, providing second connection reconfiguration information, wherein the second connection reconfiguration information includes signaling to release the SRB3.

39 . The non-transitory computer-readable storage medium of claim 38 , wherein said providing the second connection reconfiguration is performed after the UE provides a radio resource control (RRC) reconfiguration completion message or a measurement report message to the SN.

40 . The non-transitory computer-readable storage medium of claim 38 , wherein the SRB3 configuration information is a Radio Bearer Configuration information element.

41 . The non-transitory computer-readable storage medium of claim 38 , wherein the second connection reconfiguration information includes signaling radio bearer release flag, wherein in response to the signaling radio bearer release flag, the UE is configured to release a packet data convergence protocol (PDCP) entity of the SRB3.

Assignees

• Apple Inc

Inventors

• Palat Sudeep K
• Lim Seau S
• Burbidge Richard C

Classifications

• H04W76/30

  Connection release · CPC title

• H04W80/08

  Upper layer protocols {(network arrangements or communication protocols for networked applications H04L67/00)} · CPC title

• H04W76/15 Primary

  Setup of multiple wireless link connections · CPC title

• H04W76/18

  Management of setup rejection or failure · CPC title

• H04W76/27

  Transitions between radio resource control [RRC] states · CPC title