US 12,225,393 B2Granted

Methods and systems for radio link monitoring for high speed scenario

AssigneeApple Inc.

InventorsYuhan Zhou, Qiming Li, Shuang Tian, Jie Cui, Rui Huang, Yang Tang

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Abstract

Some embodiments of this disclosure include systems, apparatuses, methods, and computer-readable media for use in a wireless network for radio link monitoring for high speed user equipment (UE). For example, some embodiments are directed to the UE including radio front end circuitry and processor circuitry coupled to the radio front end circuitry. The processor circuitry can be configured to monitor a downlink associated with a cell using a reference signal and estimate a downlink radio link quality associated with the downlink. The processor circuitry can further be configured to compare the estimated downlink radio link quality with a threshold. The processor circuitry can further be configured to trigger an out-of-sync operation in response to the downlink radio link quality being worse than the threshold. The threshold can include a value less than 10%.

Claims20

Dependent claims

A user equipment (UE), comprising:

radio front end circuitry;
and
processor circuitry, coupled to the radio front end circuitry, and configured to:
monitor, using the radio front end circuitry, a downlink associated with a cell using a reference signal;
estimate a downlink radio link quality associated with the downlink;
in response to the downlink radio link quality being greater than a first threshold:
transmit, using the radio front end circuitry and to a network, a signal indicating that the UE is to be out-of-sync;
and
in response to the transmitted signal indicating that the UE is to be out-of-sync, receive, from the network, a message for preventing the UE from initiating the out-of-sync, wherein the message comprises at least one of a ratio of an energy of a Physical Downlink Control Channel (PDCCH) Resource Element (RE) to an average energy of a reference signal (RS) RE, or a ratio of an energy of a Physical Control Format Indicator Channel (PCFICH) RE to the average energy of the RS RE;
and
in response to the downlink radio link quality being greater than a second threshold, trigger an out-of-sync operation.

8 more elements

A user equipment (UE), comprising:

a memory configured to store program instructions;
and
a processor, upon executing the program instructions, configured to:
monitor, for a period of time, a downlink associated with a cell using a reference signal;
estimate a downlink radio link quality associated with the downlink during the period of time;
in response to the downlink radio link quality being greater than a first threshold:
transmit, to a network, a signal indicating that the UE is to be out-of-sync;
and
in response to the transmitted signal indicating that the UE is to be out-of-sync, receive, from the network, a message for preventing the UE from initiating the out-of-sync, wherein the message comprises at least one of a ratio of an energy of a Physical Downlink Control Channel (PDCCH) Resource Element (RE) to an average energy of a reference signal (RS) RE, or a ratio of an energy of a Physical Control Format Indicator Channel (PCFICH) RE to the average energy of the RS RE;
and
in response to the downlink radio link quality being greater than a second threshold, trigger an out-of-sync operation.

8 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/431,286Filed 21 Feb 2020 · us provisional application
Priority: 21 Feb 2019
Published: US 2022/0132344 A128 Apr 2022
Granted: 11 Feb 2025
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

H04W 4/70
Services specially adapted for wireless communication networks; Facilities therefor: services for machine-to-machine communication [M2M] or…
H04W 24/08
Supervisory, monitoring or testing arrangements: testing, supervising or monitoring using real traffic
H04L 1/20
Arrangements for detecting or preventing errors in the information received: using signal quality detector
H04L 1/203
Using signal quality detector: details of error rate determination, e.g. BER, FER or WER

Family

Application62/808,725Us provisional application · filed 21 Feb 2019
US 2022/0132344 A1Pre-grant publication · published 28 Apr 2022
US 12,225,393 B2This patent

From the US filing history. Foreign family members aren’t listed.

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