US 11,968,578 B2
Techniques for associating integrated access and backhaul (IAB) nodes with different upstream nodes
Naeem Akl, Somerville, NJ (US); Karl Georg Hampel, Hoboken, NJ (US); Ozcan Ozturk, San Diego, CA (US); Navid Abedini, Basking Ridge, NJ (US); Jianghong Luo, Skillman, NJ (US); Luca Blessent, Whitehouse Station, NJ (US); Junyi Li, Fairless Hills, PA (US); and Tao Luo, San Diego, CA (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Jun. 24, 2021, as Appl. No. 17/357,631.
Claims priority of provisional application 63/045,793, filed on Jun. 29, 2020.
Prior Publication US 2021/0410031 A1, Dec. 30, 2021
Int. Cl. H04W 36/08 (2009.01); H04B 7/155 (2006.01); H04W 36/12 (2009.01); H04W 74/08 (2009.01); H04W 74/0833 (2024.01); H04W 76/14 (2018.01); H04W 84/04 (2009.01); H04W 92/04 (2009.01)
CPC H04W 36/08 (2013.01) [H04W 36/12 (2013.01); H04W 74/0833 (2013.01); H04W 76/14 (2018.02); H04B 7/155 (2013.01); H04W 84/042 (2013.01); H04W 92/045 (2013.01)] 30 Claims
OG exemplary drawing
 
1. An apparatus for wireless communication, comprising:
a transceiver;
a memory configured to store instructions; and
one or more processors communicatively coupled with the memory and the transceiver, wherein the one or more processors are configured to execute the instructions to cause the apparatus to:
receive, by a mobile termination (MT) function, a first indication to migrate from a first IAB donor node that serves the apparatus via a first cell group provided by a first central unit (CU) to a second IAB donor node for serving the apparatus via a second cell group provided by a second CU;
perform, based at least in part on receiving the first indication, a first random access procedure to connect to the second cell group associated with the second IAB donor node;
establish, in addition to a first distributed unit (DU) function of the apparatus that provides a third cell group for serving one or more child nodes and based on performing the first random access procedure, a second DU function of the apparatus that provides a fourth cell group for serving the one or more child nodes; and
trigger, based on establishing the second DU function, a second random access procedure for a child node to migrate from the third cell group provided by the first DU function to be served by the fourth cell group provided by the second DU function.
 
25. A method of wireless communication, comprising:
receiving, by a mobile termination (MT) function of an integrated access and backhaul (IAB) node, a first indication to migrate from a first IAB donor node that serves the IAB node via a first cell group provided by a first central unit (CU) to a second IAB donor node for serving the IAB node via a second cell group provided by a second CU;
performing, by the IAB node and based at least in part on receiving the first indication, a first random access procedure to connect to the second cell group associated with the second IAB donor node;
establishing, by the IAB node in addition to a first distributed unit (DU) function of the IAB node that provides a third cell group for serving one or more child nodes and based on performing the first random access procedure, a second DU function that provides a fourth cell group for serving the one or more child nodes; and
triggering, based on establishing the second DU function, a second random access procedure for a child node to migrate from the third cell group provided by the first DU function to be served by the fourth cell group provided by the second DU function.