Techniques for using simultaneous connectivity for mobility of integrated access and backhaul nodes

Patent metadata

Field	Value
Publication number	US-11825359-B2
Application number	US-202117353042-A
Country	US
Kind code	B2
Filing date	Jun 21, 2021
Priority date	Jun 21, 2021
Publication date	Nov 21, 2023
Grant date	Nov 21, 2023

Abstract

Techniques for using simultaneous connectivity for mobility of integrated access and backhaul nodes may include an IAB node establishing a first connection with a first parent node (e.g., second IAB node) associated with a first IAB donor device (e.g., first base station) and establishing a second connection with a second parent node (third IAB node), wherein the second connection is simultaneous with the first connection. The IAB node may also switch the first connection from the first parent node to the second parent node. In doing so, the IAB node may have dual connectivity with the second parent node, where one connection is a master connection and the other connection is a secondary connection.

First claim

What is claimed is:

1. A method of wireless communication for a first integrated access and backhaul (IAB) node, comprising:
establishing a first connection with a first parent node associated with a first IAB donor device;
establishing a second connection with a second parent node, wherein the second connection is simultaneous with the first connection; and
switching the first connection from the first parent node to the second parent node,
wherein the second connection is switched from the second parent node to the third parent node in response to the first connection being switched to the second parent node, or wherein the second connection is switched from the second parent node to the third parent node concurrently with the first connection being switched to the second parent node.

2. The method of claim 1 , wherein the second parent node is associated with the first IAB donor device or a second IAB donor device.

3. The method of claim 1 , wherein the first connection is switched to a same cell served by the second parent node as that of the second connection.

4. The method of claim 1 , wherein the first connection is switched to a first cell served by the second parent node, the second connection is coupled with a second cell served by the second parent node, the first cell being different from the second cell.

5. The method of claim 4 , wherein the first cell includes one or more of a first physical cell identification (PCI), a first global cell identification (GCI), or a first frequency different from a second PCI, a second GCI, or a second frequency of the second cell.

6. The method of claim 1 , wherein the second connection is established simultaneously with the first connection using one of a new radio dual connectivity (NR-DC) technology, a multi-radio access technology dual connectivity (MR-DC) technology, a multi-mobile termination (multi-MT) technology, or a dual active protocol stack (DAPS) technology.

7. The method of claim 1 , further comprising:
releasing one of the first connection or the second connection in response to the first connection being switched to the second parent node.

8. The method of claim 1 , further comprising:
automatically releasing the second connection in response to the first connection being switched to the second parent node.

9. The method of claim 1 , wherein the second connection is switched from the second parent node to the third parent node in response to the first connection being switched to the second parent node.

10. The method of claim 1 , wherein the second connection is switched from the second parent node to the third parent node concurrently with the first connection being switched to the second parent node.

11. The method of claim 1 , wherein the first IAB node is one of a base station, a user equipment (UE), or a relay device.

12. A method of wireless communication for a first integrated access and backhaul (IAB) node, comprising:
establishing a first connection with a first parent node associated with a first IAB donor device;
establishing a second connection with a second parent node, wherein the second connection is simultaneous with the first connection;
transmitting, to one of the first IAB donor device, a second IAB donor device, or a network node that controls the first IAB donor device or the second IAB donor device, an indication of capabilities of the first TAB node to switch the first connection to a same parent node as the second connection; and
switching the first connection from the first parent node to the second parent node, wherein the first connection is switched from the first parent node to the second parent node in response to the indication being transmitted.

13. A first integrated access and backhaul (IAB) node, comprising:
one or more memories storing instructions; and
one or more processors coupled with the one or more memories and configured to execute the instructions to:
establish a first connection with a first parent node associated with a first IAB donor device;
establish a second connection with a second parent node, wherein the second connection is simultaneous with the first connection; and
switch the first connection from the first parent node to the second parent node,
switch the second connection from the second parent node to the third parent node in response to the first connection being switched to the second parent node, or switch the second connection from the second parent node to the third parent node concurrently with the first connection being switched to the second parent node.

14. The first IAB node of claim 13 , wherein the second parent node is associated with the first IAB donor device or a second IAB donor device.

15. The first IAB node of claim 13 , wherein the one or more processors are configured to execute the instructions to switch the first connection to a same cell served by the second parent node as that of the second connection.

16. The first IAB node of claim 13 , wherein the one or more processors are configured to execute the instructions to switch the first connection to a first cell served by the second parent node, the second connection is coupled with a second cell served by the second parent node, the first cell being different from the second cell.

17. The first IAB node of claim 16 , wherein the first cell includes one or more of a first physical cell identification (PCI), a first global cell identification (GCI), or a first frequency different from a second PCI, a second GCI, or a second frequency of the second cell.

18. The first IAB node of claim 13 , wherein the one or more processors are configured to execute the instructions to establish the second connection simultaneously with the first connection using one of a new radio dual connectivity (NR-DC) technology, a multi-radio access technology dual connectivity (MR-DC) technology, a multi-mobile termination (multi-MT) technology, or a dual active protocol stack (DAPS) technology.

19. The first IAB node of claim 13 , wherein the one or more processors are configured to execute the instructions to:
release one of the first connection or the second connection in response to the first connection being switched to the second parent node.

20. The first IAB node of claim 13 , wherein the one or more processors are configured to execute the instructions to:
automatically release the second connection in response to the first connection being switched to the second parent node.

21. The first IAB node of claim 13 , wherein the one or more processors are configured to execute the instructions to switch the second connection from the second parent node to the third parent node in response to the first connection being switched to the second parent node.

22. The first IAB node of claim 13 , wherein the one or more processors are configured to execute the instructions to switch the second connection from the second parent node to the third parent node concurrently with the first connection being switched to the second parent node.

23. The first IAB node of claim 13 , wherein the first IAB node is one of a base station, a user equipment (UE), or a relay device.

24. A first integrated access and backhaul (IAB) node, comprising:
one or more memories storing instructions; and
one or more processors coupled with the one or more memories and configured to execute the instructions to:
establish a first connection with a first parent node associated with

Assignees

• Qualcomm Inc

Inventors

• Akl Naeem
• Hampel Karl Georg
• Abedini Navid
• Luo Jianghong
• Blessent Luca
• Li Junyi
• Luo Tao

Classifications

• H04W36/185

  using make before break · CPC title

• H04W36/0069 Primary

  in case of dual connectivity, e.g. decoupled uplink/downlink · CPC title

• H04W36/0061

  of neighbour cell information · CPC title

• H04W36/12

  Reselecting a serving backbone network switching or routing node · CPC title

• H04W36/18

  for allowing seamless reselection, e.g. soft reselection · CPC title