Signaling radio bearer type 3 (SRB3) and secondary cell group (SCG) failure handling

Patent metadata

Field	Value
Publication number	US-11540343-B2
Application number	US-202016996102-A
Country	US
Kind code	B2
Filing date	Aug 18, 2020
Priority date	Sep 28, 2017
Publication date	Dec 27, 2022
Grant date	Dec 27, 2022

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

What is claimed is:

1. An apparatus 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), wherein the SRB3 is for direct communication between a user equipment device (UE) and the SN;
provide first connection reconfiguration information to the UE, the connection reconfiguration information including the SRB3 configuration information;
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.

2. The apparatus of claim 1 , wherein the one or more processors are further configured to:
receive a radio resource control (RRC) reconfiguration completion message from the UE, wherein said providing the second connection reconfiguration is performed after said receiving the RRC reconfiguration completion message.

3. The apparatus of claim 1 , wherein said providing the second connection reconfiguration is performed after the UE provides a measurement report message to the SN.

4. The apparatus of claim 1 , wherein the SRB3 configuration information is a Radio Bearer Configuration information element.

5. The apparatus of claim 1 , 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.

6. The apparatus of claim 1 , 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.

7. The apparatus of claim 6 , wherein the notification message includes a failure type for the failure.

8. The apparatus of claim 6 , wherein the notification message further includes a transaction ID of a last processed RRC message prior to detecting the SCG failure.

9. The apparatus of claim 6 , wherein the notification message further includes measurements associated with the SCG.

10. A method for operating a user equipment (UE) comprising:
by the UE:
receiving signaling radio bearer type 3 (SRB3) configuration information from a master node (MN), the SRB3 for direct communication between the UE and a secondary node (SN);
receiving connection reconfiguration information from the MN, wherein the connection reconfiguration information includes signaling to release the SRB3.

11. The method of claim 10 , further comprising:
providing a radio resource control (RRC) reconfiguration completion message to the MN, wherein said receiving the connection reconfiguration is performed after the UE provides the RRC reconfiguration completion message to the MN.

12. The method of claim 10 , further comprising:
providing a measurement report to the SN, wherein said receiving the connection reconfiguration is performed after providing the measurement report message to the SN.

13. The method of claim 10 , wherein the SRB3 configuration information is a Radio Bearer Configuration information element.

14. The method of claim 10 , wherein the 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.

15. A non-transitory computer accessible memory medium storing program instructions executable by one or more processors of a secondary node (SN) to:
provide signaling radio bearer type 3 (SRB3) configuration information to a user equipment (UE), the SRB3 for direct communication between the UE and the SN, wherein the UE is also in communication with a master node (MN), wherein said providing the SRB3 configuration information is provided in first connection reconfiguration information;
provide second connection reconfiguration information to the UE, wherein the second connection reconfiguration information includes signaling to release the SRB3.

16. The non-transitory computer accessible memory medium of claim 15 , wherein the program instructions are further executable to:
receive a radio resource control (RRC) reconfiguration completion message from the UE, wherein said providing the second connection reconfiguration is performed after said receiving the RRC reconfiguration completion message.

17. The non-transitory computer accessible memory medium of claim 15 , wherein the program instructions are further executable to:
receive a measurement report message from the UE, wherein said providing the second connection reconfiguration is performed after receiving the measurement report message.

18. The non-transitory computer accessible memory medium of claim 15 , wherein the SRB3 configuration information is a Radio Bearer Configuration information element.

19. The non-transitory computer accessible memory medium of claim 15 , wherein the second connection reconfiguration information includes signaling radio bearer release flag, wherein in response to the signaling radio bearer release flag, the LIE is configured to release a packet data convergence protocol (PDCP) entity of the SRB3.

20. An apparatus comprising:
one or more processors, wherein the one or more processors are configured to cause a user equipment (UE) to:
receive signaling radio bearer type 3 (SRB3) configuration information from a secondary node (SN), the SRB3 for direct communication between the UE and the SN, wherein the UE is also in communication with a master node (MN), and wherein said receiving the SRB3 configuration information is provided in first connection reconfiguration information;
receiving second connection reconfiguration information from the SN, wherein the second connection reconfiguration information includes signaling to release the SRB3.

21. The apparatus of claim 20 , wherein the one or more processors are further configured to:
provide a radio resource control (RRC) reconfiguration completion message to the SN, wherein said receiving the second connection reconfiguration is performed after providing the RRC reconfiguration completion message to the SN.

22. The apparatus of claim 20 , wherein the one or more processors are further configured to:
provide a measurement report to the SN, wherein said receiving the second connection reconfiguration is performed after providing a measurement report message to the SN.

23. The apparatus of claim 20 , wherein the SRB3 configuration information is a Radio Bearer Configuration information element.

24. The apparatus of claim 20 , 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

• H04W76/15 Primary

  Setup of multiple wireless link connections · CPC title

• H04W76/18

  Management of setup rejection or failure · CPC title

• H04W76/30

  Connection release · CPC title

• H04W80/08

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

• H04W76/27

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