Invention Grant
- Patent Title: Radio link monitoring for link-budget-limited devices
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Application No.: US15605977Application Date: 2017-05-26
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Publication No.: US10057860B2Publication Date: 2018-08-21
- Inventor: Tarik Tabet , Samy Khay-Ibbat , Awais M. Hussain
- Applicant: Apple Inc.
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Agency: Meyertons Hood Kivlin Kowert & Goetzel, P.C.
- Agent Jeffrey C. Hood
- Main IPC: H04B7/00
- IPC: H04B7/00 ; H04W52/24 ; H04W72/08 ; H04L5/00 ; H04W52/26 ; H04W72/04

Abstract:
A link-budget-limited wireless communication device (UE) may implement improved radio link monitoring procedures for enhancing the link-budget of the UE. The UE may monitor the radio link and may determine whether the radio link can support a lowest acceptable link quality according to a hysteresis-based comparison that uses threshold values to determine error rates associated with a physical control channel. The UE may also identify itself to the network as a link-budget-limited device, and the network may enable special link-budget enhancing features for the UE, including boosting the power of the resource elements (REs) carrying physical channel signaling/data to the UE. The UE may detect the presence of power boost and may estimate/determine the power boost level. The UE may modify the threshold values based on the power boost detection and/or results of the power boost level estimation/determination, and may use the modified threshold values for determining radio link quality during radio link monitoring.
Public/Granted literature
- US20170273031A1 Radio Link Monitoring for Link-Budget-Limited Devices Public/Granted day:2017-09-21
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