US 11,659,451 B2
Serving gateway control plane function to manage a plurality of serving gateway user plane functions, and mobility management entity to communicate with the same
Jinyin Zhu, Shanghai (CN); Juying Gan, Shanghai (CN); Yunjie Lu, Shanghai (CN); and Wenliang Xu, Shanghai (CN)
Assigned to Telefonaktiebolaget LM Ericsson (Publ), Stockholm (SE)
Appl. No. 17/47,284
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Apr. 16, 2019, PCT No. PCT/CN2019/082894
§ 371(c)(1), (2) Date Oct. 13, 2020,
PCT Pub. No. WO2019/205991, PCT Pub. Date Oct. 31, 2019.
Claims priority of application No. PCT/CN2018/084751 (WO), filed on Apr. 27, 2018.
Prior Publication US 2021/0153080 A1, May 20, 2021
Int. Cl. H04W 36/00 (2009.01); H04W 36/08 (2009.01); H04W 36/32 (2009.01)
CPC H04W 36/0022 (2013.01) [H04W 36/0016 (2013.01); H04W 36/08 (2013.01); H04W 36/32 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method for a serving gateway control plane function to manage a plurality of serving gateway user plane functions, the method comprising:
connecting with the plurality of serving gateway user plane functions;
storing serving area information of the plurality of serving gateway user plane functions;
selecting a first serving gateway user plane function among the plurality of serving gateway user plane functions for a user equipment, according to location of the user equipment and the serving area information of the plurality of serving gateway user plane functions; and
sending serving area information of the first serving gateway user plane function to a mobility management entity;
receiving from the mobility management entity, a request for changing the first serving gateway user plane function;
reselecting a second serving gateway user plane function from the plurality of serving gateway user plane functions;
sending serving area information of the second serving gateway user plane function to the mobility management entity;
deleting a session with the first serving gateway user plane function; and
receiving an indication to notify a packet data network gateway from the mobility management entity, in response to the reselection of the second serving gateway user plane function happening during an idle mode mobility procedure.