US 12,328,708 B2
Optimization of tracking area lists for wireless device paging
Åke Johansson, Pixbo (SE); and Jesper Derehag, Kareby (SE)
Assigned to Telefonaktiebolaget LM Ericsson (Publ), Stockholm (SE)
Appl. No. 17/922,187
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed May 5, 2020, PCT No. PCT/SE2020/050456
§ 371(c)(1), (2) Date Oct. 28, 2022,
PCT Pub. No. WO2021/225481, PCT Pub. Date Nov. 11, 2021.
Prior Publication US 2023/0189216 A1, Jun. 15, 2023
Int. Cl. H04W 68/04 (2009.01)
CPC H04W 68/04 (2013.01) 20 Claims
OG exemplary drawing
 
1. A method for maintaining a tracking area list, TAL, associated with a first wireless device in a wireless access network, the wireless access network comprising network nodes arranged to page the first wireless device, the network nodes being organized into tracking areas, TA, the method comprising:
obtaining data associated with a transition pattern of wireless devices between TAs in the wireless access network, the data being indicative of transition probabilities for wireless devices moving between the TAs;
receiving a message indicating that the first wireless device is leaving a TA and is entering a current TA; and
maintaining the TAL by adding the current TA to the TAL and selecting TAs neighboring the current TA for addition to the TAL based on the transition probabilities of a wireless device moving from the current TA and into neighboring TAs, a neighboring TA associated with high transition probability being selected for addition to the TAL before a neighboring TA associated with low transition probability.