US 11,659,462 B2
Methods and apparatuses for selecting a session management entity for serving a wireless communication device
Stefan Rommer, Västra Frölunda (SE); Qian Chen, Mölndal (SE); Patrik Dannebro, Hisings Kärra (SE); and Åsa Larsen, Hisings Backa (SE)
Assigned to Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Appl. No. 16/960,430
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Jan. 8, 2018, PCT No. PCT/EP2018/050337
§ 371(c)(1), (2) Date Jul. 7, 2020,
PCT Pub. No. WO2019/134754, PCT Pub. Date Jul. 11, 2019.
Prior Publication US 2020/0344655 A1, Oct. 29, 2020
Int. Cl. H04W 36/12 (2009.01); H04W 76/36 (2018.01); H04W 48/18 (2009.01); H04W 88/14 (2009.01); H04W 84/04 (2009.01)
CPC H04W 36/12 (2013.01) [H04W 48/18 (2013.01); H04W 76/36 (2018.02); H04W 88/14 (2013.01); H04W 84/042 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A method of selecting a session management, SM, entity for serving a wireless communication device, WCD, in a core network, the method is performed by an access management entity in the core network and comprises:
determining that a first user plane entity and a second user plane entity are needed for a data session associated with the WCD, wherein the first user plane entity is configured to handle the data session in a first domain of the core network and the second user plane entity is configured to handle the data session in a second domain of the core network;
in response to determining that the first user plane entity and the second user plane entity are needed for the data session, selecting, based on WCD information indicating properties of the WCD and SM domain information at least indicating the first user plane entity and the second user plane entity that are controlled by a first SM entity and a second SM entity in the core network respectively, the second SM entity as an additional intermediate SM entity to control the second user plane entity in the second domain for handling the data session in the second domain;
sending, towards the second SM entity, a session request message requesting the second SM entity to act as the additional intermediate SM by allocating resources for handling the data session in the second domain; and
receiving, in response to the session request message, a session response message indicating that the second SM entity has accepted to act as the additional intermediate SM entity.