Satellite Interference Control in Overlapping-Frequency Access Networks

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Solution Overview

Problem

Satellite communication is affected by interference from ground access network devices, leading to degraded service quality due to overlapping frequency bands.

Innovation Solution

A communication method and apparatus that determines interfering access network devices and sends indication information to reduce interference by adjusting transmit power, frequency band, or stopping operations to maintain a threshold aggregate interference value.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If ground access network devices transmit signals in overlapping frequency bands, then communication coverage and capacity are improved, but interference to satellite receivers increases and service quality deteriorates

Engineering Contradiction:

Improvecommunication coverage and capacityVSAvoidinterference to satellite receiver

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent implements a feedback mechanism where the management device receives interference information from the satellite receiver, calculates aggregate interference values, and sends indication information back to access network devices. This closed-loop feedback system enables dynamic adjustment of transmission parameters to maintain service quality while preserving communication productivity.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent changes transmission parameters of access network devices based on interference conditions. The management device calculates aggregate interference values and adjusts parameters such as transmit power, frequency band selection, or time of operation for access network devices to ensure interference remains below threshold levels while maintaining communication service quality.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If indication information is sent to all access network devices, then interference management comprehensiveness is improved, but resource overhead increases

Engineering Contradiction:

Improveinterference management comprehensivenessVSAvoidresource overhead

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The patent applies local quality by sending indication information selectively only to access network devices that exceed interference thresholds. The management device calculates aggregate interference values for each device and sends targeted indication information only to those requiring adjustment, rather than universally notifying all devices. This reduces resource overhead while maintaining comprehensive interference management for affected devices.

Inventive Principle:

Principle #3Local quality

3Object-affected harmful factors

If transmit power of access network devices is reduced, then interference to satellite is decreased, but communication signal strength and coverage are compromised

Engineering Contradiction:

Improveinterference to satelliteVSAvoidcommunication signal strength

Core Design Contradiction:

Object-affected harmful factorsVSUse of energy by moving object

Solution Approach 1:

The patent implements dynamic adjustment of transmit power based on real-time interference conditions. The management device monitors aggregate interference values and dynamically modifies transmission parameters of access network devices. When interference thresholds are exceeded, power reduction is applied; when thresholds are met, normal operation is restored. This dynamic approach balances interference reduction with maintaining adequate communication signal strength.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent employs periodic assessment of interference conditions through repeated calculation of aggregate interference values. The management device continuously monitors interference levels and periodically adjusts transmission parameters. This periodic action allows access network devices to operate at full power during low-interference periods while reducing power only when necessary, thereby maintaining communication quality while managing satellite interference.

Inventive Principle:

Principle #19Periodic action

Data Source

PatentUS20260006631A1Communication method, communication apparatus, and communication system

Publication Date: 2026.01.01 HUAWEI TECH CO LTD

AI summary

A first device determines based on ephemeris information of a satellite and service information of a first service on the satellite, at least one access network device that uses a frequency band overlapping with a frequency band used by the satellite to perform the first service, and sends indication information to one or more of the at least one access network device. The indication information indicates to reduce interference to the satellite, to enable a first aggregate interference value of the at least one access network device to the satellite to be less than or equal to a first threshold.