# US 11,909,582 B2 · Network notification of a cell timing source outage

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- Number: US 11,909,582 B2
- Document ID: US11909582B2
- Status: Granted
- Kind: B2
- Application number: 17/402,275
- Filed: 2021-08-13
- Published: 2023-02-16
- Granted: 2024-02-20
- Earliest claimed: 2021-08-13
- Assignees: QUALCOMM Incorporated
- Applicants: QUALCOMM Incorporated
- Inventors: Sony Akkarakaran; Tao Luo; Jingchao Bao
- Web page: https://patentgrep.com/patent/US11909582B2

## CPC

- H04L 41/0686: Additional information in the notification, e.g. enhancement of specific meta-data
- H04J 3/06: Synchronising arrangements {(for television systems H04N5/04; bit-synchronisation H04L7/00)}
- H04J 3/065: {using timestamps}
- H04L 43/0864: Round trip delays
- H04W 56/0015: {one node acting as a reference for the others}
- H04W 56/0025: {synchronizing potentially movable access points}
- H04W 56/003: {Arrangements to increase tolerance to errors in transmission or reception timing}
- H04W 56/004: {compensating for timing error of reception due to propagation delay}
- H04W 56/0055: {determining timing error of reception due to propagation delay}
- H04W 56/0065: {using measurement of signal travel time}
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04J: MULTIPLEX COMMUNICATION (transmission in general H04B; peculiar to transmission of digital information H04L5/00; systems for the simultaneous or sequential transmission of more than one television signal H04N7/08; in exchanges H04Q11/00; stereophonic systems H04S)
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

Techniques are provided for informing a network of a timing source outage in a node and reestablishing a synchronized time in the node. An example method for providing a timing source outage notification includes detecting an outage of a timing source, determining one or more impacted nodes, generating one or more notification messages based at least in part on a communication context for each of the one or more impacted nodes, and transmitting the one or more notification messages.

## Claims

### Claim 1

A method for providing a timing source outage notification, comprising:
detecting an outage of a timing source;
determining one or more impacted nodes;
determining a communication context for the one or more impacted nodes based at least in part on whether the one or more impacted nodes is participating in a synchronous sensitive procedure;
selecting a protocol based at least in part on the communication context;
generating one or more notification messages based at least in part on the selected protocol and the communication context for the one or more impacted nodes; and
transmitting the one or more notification messages.

### Claim 2 (depends on 1)

The method of claim 1 wherein the outage of the timing source is associated with a base station.

### Claim 3 (depends on 2)

The method of claim 2 wherein detecting the outage in the timing source includes receiving a timing source outage notification message from the base station based on a New Radio Positioning Protocol.

### Claim 4 (depends on 1)

The method of claim 1 wherein detecting the outage of the timing source is based on a failure to decode a global navigation satellite system signal.

### Claim 5 (depends on 1)

The method of claim 1 wherein the detecting the outage of the timing source is based on a reference signal measurement obtained by a user equipment.

### Claim 6 (depends on 1)

The method of claim 1 wherein the one or more notification messages include an indication of a node experiencing the outage of the timing source and a timestamp indicating a time the outage of the timing source occurred.

### Claim 7 (depends on 1)

The method of claim 1 wherein the one or more notification messages include at least one of an accuracy measure information element, an outage reason information element, a timing sources impacted information element, and a recovery time information element.

### Claim 8 (depends on 1)

The method of claim 1 wherein the communication context for a first impacted node includes a positioning procedure, and transmitting the one or more notification messages includes transmitting a first notification message to the first impacted node via a medium access control element or a downlink control element.

### Claim 9 (depends on 1)

The method of claim 1 wherein transmitting the one or more notification messages includes transmitting at least one notification message to a user equipment.

### Claim 10

An apparatus, comprising:
a memory;
at least one transceiver;
at least one processor communicatively coupled to the memory and the at least one transceiver, and configured to:
detect an outage of a timing source;
determine one or more impacted nodes;
determine a communication context for the one or more impacted nodes based at least in part on whether the one or more impacted nodes is participating in a synchronous sensitive procedure;
select a protocol based at least in part on the communication context;
generate one or more notification messages based at least in part on the selected protocol and the communication context for the one or more impacted nodes; and
transmit the one or more notification messages.

### Claim 11 (depends on 10)

The apparatus of claim 10 wherein the at least one processor is further configured to detect a failure to decode a global navigation satellite system signal.

### Claim 12 (depends on 10)

The apparatus of claim 10 wherein the at least one processor is further configured detect the outage of the timing source based on a reference signal measurement obtained by a user equipment.

### Claim 13 (depends on 10)

The apparatus of claim 10 wherein the one or more notification messages include at least one of an indication of a node experiencing the outage of the timing source, a timestamp indicating a time the outage of the timing source occurred, an accuracy measure information element, an outage reason information element, a timing sources impacted information element, and a recovery time information element.

### Claim 14 (depends on 10)

The apparatus of claim 10 wherein the communication context for a first impacted node includes a positioning procedure, and the at least one processor is further configured to transmit a first notification message to the first impacted node via a medium access control element or a downlink control element.

### Claim 15 (depends on 10)

The apparatus of claim 10 wherein the at least one processor is further configured to transmit at least one notification message to a user equipment.