Terminal Self-Interference Measurement and Reporting

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Solution Overview

Problem

In wireless communication systems, self-interference occurs when a terminal device transmits and receives signals at the same frequency, leading to reduced communication performance, and existing methods fail to effectively minimize this interference.

Innovation Solution

A wireless communication method where the terminal device determines and reports the strength of self-interference in both uplink and downlink frequency bands to the network device, allowing the network to schedule operations that minimize interference, such as adjusting transmit power or avoiding simultaneous transmission and reception in affected frequency bands.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the terminal device transmits and receives signals at the same frequency, then communication coverage and connectivity are improved, but self-interference increases and communication performance deteriorates

Engineering Contradiction:

Improvecommunication coverageVSAvoidself-interference

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The terminal device performs preliminary measurement of self-interference strength before actual communication occurs. The device measures the strength of self-interference generated by different UL-DL frequency band combinations and reports this information to the network device in advance, enabling the network to make informed scheduling decisions that avoid strong interference scenarios.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The terminal device provides feedback information about self-interference strength to the network device through measurement and reporting mechanisms. This feedback loop enables the network to adjust scheduling decisions based on actual interference conditions, creating a closed-loop system that adapts to minimize self-interference while maintaining communication coverage.

Inventive Principle:

Principle #23Feedback

2Reliability

If the terminal device reports self-interference strength information, then the network can schedule operations to minimize interference, but the device complexity and measurement overhead increase

Engineering Contradiction:

Improvecommunication performanceVSAvoidmeasurement and reporting mechanism

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The system changes the parameter of frequency band selection based on self-interference strength measurements. By measuring and comparing interference levels across different UL-DL frequency combinations, the system dynamically adjusts scheduling parameters to select frequency pairs that minimize self-interference, thereby improving communication performance without requiring complex hardware modifications.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS11234246B2Wireless communication method and device

Publication Date: 2022.01.25 GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP LTD

AI summary

Provided in an embodiment of the present invention are a wireless communication method and device capable of minimizing self-interference at a terminal device and improving communication performance. The method comprises: determining a magnitude of self-interference at a terminal device generated in a first uplink frequency band and a first downlink frequency band over which the terminal device performs communication with a network device; and transmitting a first message to the network device, the first message indicating the magnitude of the self-interference at the terminal device generated in the first UL frequency band and the first DL frequency band.