# US 12,010,580 B2 · Method of informing serving cell of uplink interference at neighbor cell caused by unmanned aerial vehicle

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- Number: US 12,010,580 B2
- Document ID: US12010580B2
- Status: Granted
- Kind: B2
- Application number: 18/221,257
- Filed: 2023-07-12
- Published: 2023-11-09
- Granted: 2024-06-11
- Earliest claimed: 2017-08-11
- Assignees: KYOCERA Corporation
- Applicants: Kyocera Corporation
- Inventors: Amit Kalhan; Henry Chang
- Web page: https://patentgrep.com/patent/US12010580B2

## CPC

- H04W 36/0085: {Hand-off measurements}
- H04W 36/20: for optimising the interference level
- H04B 7/18504: {Aircraft used as relay or high altitude atmospheric platform}
- H04W 24/10: Scheduling measurement reports {; Arrangements for measurement reports}
- H04W 36/0058: {Transmission of hand-off measurement information, e.g. measurement reports}
- H04W 36/0061: {of neighbour cell information}
- H04W 36/0072: {of resource information of target access point}
- H04W 36/08: Reselecting an access point
- H04W 36/083: {wherein at least one of the access points is a moving node}
- H04W 36/38: by fixed network equipment
- H04W 48/10: using broadcasted information
- H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal
- H04W 72/541: using the level of interference
- H04W 36/00837: {Determination of triggering parameters for hand-off}
- H04W 36/165: {for reducing network power consumption (H04W36/18 - H04W36/22 take precedence)}
- H04W 36/302: {due to low signal strength}
- H04W 48/12: using downlink control channel
- H04W 72/20: Control channels or signalling for resource management
- H04W 84/06: Airborne or Satellite Networks (space-based or airborne stations H04B7/185)
- H04W 88/02: Terminal devices
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- H04B: TRANSMISSION

## Abstract

A neighboring cell determines that uplink interference from an unmanned aerial vehicle (UAV) exceeds a first threshold at the neighboring cell. The neighboring cell transmits an uplink interference indicator to the UAV. In some examples, the UAV informs its serving cell of the uplink interference experienced by the neighboring cell. The serving cell can utilize information received from the UAV to make handover decisions or scheduling decisions for the UAV that caused the uplink interference. In other examples, the UAV can temporarily refrain from transmitting on at least some of its uplink resources or utilize different uplink resources for uplink data transmissions. In still other examples, the UAV can utilize downlink measurements to select which neighboring base station System Information Block messages should be monitored for an uplink interference indicator.

## Claims

### Claim 1

A method comprising:
informing a serving cell of uplink interference experienced by a neighboring cell;
in response to an unmanned aerial vehicle (UAV) detecting the uplink interference with the neighboring cell, transmitting a downlink measurement report to the serving cell, the downlink measurement report associated with downlink transmissions received by the UAV from the neighboring cell, the downlink measurement report including an identifier of the neighboring cell.

### Claim 2 (depends on 1)

The method of claim 1, wherein informing the serving cell of the uplink interference experienced by the neighboring cell comprises:
transmitting an uplink interference indicator to the serving cell.

### Claim 3 (depends on 1)

The method of claim 1, further comprising:
transmitting a handover command to the UAV.

### Claim 4 (depends on 3)

The method of claim 3, wherein the handover command is based on:
the identifier of the neighboring cell that experienced the uplink interference, and
a downlink measurement report received from the UAV.

### Claim 5 (depends on 1)

The method of claim 1, further comprising:
allocating a different uplink radio resource to the UAV.

### Claim 6

A wireless communication device (WCD) capable of flight without having a human pilot aboard, the wireless communication device comprising
a transmitter configured to: inform a serving cell of uplink interference experienced by a neighboring cell; and
in response to detecting the uplink interference with the neighboring cell, transmit a downlink measurement report to the serving cell, the downlink measurement report associated with downlink transmissions received by the UAV from the neighboring cell, the downlink measurement report including an identifier of the neighboring cell.

### Claim 7

An apparatus for controlling a wireless communication device (WCD) capable of flight without having a human pilot aboard, the apparatus configured to perform processing of:
informing a serving cell of uplink interference experienced by a neighboring cell; and
in response to detecting the uplink interference with the neighboring cell, transmitting a downlink measurement report to the serving cell, the downlink measurement report associated with downlink transmissions received by the UAV from the neighboring cell, the downlink measurement report including an identifier of the neighboring cell.
