US 12,137,431 B2
Method and apparatus for managing AMF re-allocation
Varini Gupta, Bangalore (IN); Rajavelsamy Rajadurai, Bangalore (IN); Danish Ehsan Hashmi, Bangalore (IN); Lalith Kumar, Bangalore (IN); and Hoyeon Lee, Suwon-si (KR)
Assigned to Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on Oct. 29, 2021, as Appl. No. 17/515,255.
Claims priority of application No. 202041047457 (IN), filed on Oct. 30, 2020; and application No. 202041047457 (IN), filed on Oct. 20, 2021.
Prior Publication US 2022/0182963 A1, Jun. 9, 2022
Int. Cl. H04W 60/00 (2009.01); H04W 8/08 (2009.01); H04W 8/18 (2009.01); H04W 12/06 (2021.01); H04W 40/04 (2009.01); H04W 48/18 (2009.01)
CPC H04W 60/00 (2013.01) [H04W 8/08 (2013.01); H04W 8/18 (2013.01); H04W 12/06 (2013.01); H04W 40/04 (2013.01); H04W 48/18 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A method performed by a first access and mobility management function (AMF) in a communication network, the method comprising:
receiving a first registration request message from a user equipment (UE);
determining that the first AMF is unable to serve the UE and the first AMF is unable to directly communicate with a second AMF, wherein the second AMF is a target AMF for rerouting; and
sending a registration accept message to the UE in response to the first registration request message,
wherein the registration accept message includes reroute assistance information including a 5G-global unique temporary identifier (GUTI) encoded for an AMF set including the second AMF, and
wherein the 5G GUTI comprises at least one of an AMF-Set identity (ID) in a globally unique AMF ID (GUAMI) being set to an AMF ID of the second AMF, an AMF pointer set to 0xFFFFFF value or a reserved value, or a serving temporary mobile subscriber identity (S-TMSI).