- Patent Title: Indicating tracking area update (TAU) while in RRC inactive state
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Application No.: US17545039Application Date: 2021-12-08
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Publication No.: US11778684B2Publication Date: 2023-10-03
- Inventor: Christofer Lindheimer , Icaro L. J. Da Silva , Gunnar Mildh , Paul Schliwa-Bertling
- Applicant: Telefonaktiebolaget LM Ericsson (publ)
- Applicant Address: SE Stockholm
- Assignee: Telefonaktiebolaget LM Ericsson (publ)
- Current Assignee: Telefonaktiebolaget LM Ericsson (publ)
- Current Assignee Address: SE Stockholm
- Agency: Murphy, Bilak & Homiller, PLLC
- Main IPC: H04W76/27
- IPC: H04W76/27 ; H04W76/19 ; H04W76/28 ; H04W60/04 ; H04W68/08 ; H04W74/00

Abstract:
Embodiments include methods in a wireless device. Such methods include, while the wireless device is in an RRC inactive state with respect to a wireless communication network, determining that updates are needed for the wireless device's access stratum (AS) and non-access stratum (NAS). For example, the AS update can be a RAN notification area update (RNAU) and the NAS update can be a tracking area update (TAU). Such methods include transmitting, to the wireless communication network, a request to resume an RRC connected state with the wireless communication network. The request includes a cause indicator that indicates mobility signaling as a cause for resuming the RRC connected state. Such methods also include receiving, from the wireless communication network, a response to the request to resume the RRC connected state and initiating the NAS update based on the response. Other embodiments include wireless devices configured to perform such methods.
Public/Granted literature
- US20220095412A1 INDICATING TRACKING AREA UPDATE (TAU) WHILE IN RRC INACTIVE STATE Public/Granted day:2022-03-24
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