Multi-Carrier Self-Interference Cancellation via Terminal Feedback
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Solution Overview
Problem
Multi-carrier real self-interference, such as harmonic, adjacent channel, and intermodulation interference, occurs during simultaneous uplink and downlink transmission in radio communication systems, leading to sensitivity loss and potential communication disruption.
Innovation Solution
A method and device for canceling multi-carrier real self-interference, where a terminal device determines potential self-interference and transmits an instruction message to a network device to conduct interference avoidance, including scheduling carrier operations and adjusting transmission power to minimize interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If simultaneous multi-carrier uplink and downlink transmission is implemented, then transmission rate and system capacity are improved, but real self-interference (harmonic, adjacent channel, intermodulation interference) occurs causing sensitivity loss
Solution Approach 1:
The terminal device performs real self-interference determination before transmitting data, proactively identifying potential interference issues. The network device receives the determination result and pre-adjusts scheduling or transmission parameters to avoid interference occurrence, rather than reacting after interference has degraded performance
Solution Approach 2:
The terminal device feeds back real self-interference determination results to the network device through uplink signaling. The network device uses this feedback to adjust scheduling decisions, transmission power, or carrier combinations, creating a closed-loop system that continuously optimizes to avoid self-interference while maintaining high throughput
2Productivity
If simultaneous multi-carrier uplink and downlink transmission is implemented, then system capacity is improved, but harmonic, adjacent channel, and intermodulation interference occur causing sensitivity loss
Solution Approach 1:
The system performs real self-interference determination before data transmission, proactively identifying potential interference issues. The network device receives the determination result and pre-adjusts scheduling or transmission parameters to avoid interference occurrence, rather than reacting after interference has degraded performance
Solution Approach 2:
The terminal device feeds back real self-interference determination results to the network device through uplink signaling. The network device uses this feedback to adjust scheduling decisions, transmission power, or carrier combinations, creating a closed-loop system that continuously optimizes to avoid self-interference while maintaining high throughput
3Reliability
If a worst-case combination is specified in protocol to ensure carrier aggregation performance, then reliability is improved, but device complexity and operational flexibility increase
Solution Approach 1:
The terminal device autonomously performs real self-interference determination on its own multi-carrier combinations and actively reports results to the network device. This self-service approach replaces complex protocol-specified worst-case avoidance rules with a simpler mechanism where each terminal manages its own interference issues independently
Solution Approach 2:
The system dynamically changes operational parameters (scheduling decisions, transmission power, carrier combinations) based on real self-interference determination results. This replaces static worst-case combination specifications with dynamic parameter adjustment, reducing protocol complexity while maintaining or improving reliability
Data Source
AI summary
A method, device and computer readable medium for cancelling multi-carrier real self-interference in a wireless communication network. The multi-carrier real self-interference is canceled by: in response to the presence of potential self-interference in a multi-carrier combination of a terminal device, performing real self-interference determination on the potential self-interference; and in response to determining that real self-interference is present in the multi-carrier combination, sending an instruction message to a network device, the instruction message being used for instructing the network device to perform an interference avoidance operation on the multi-carrier combination. Therefore, whether real self-interference is present when a terminal works under a multi-carrier condition can be determined, and an instruction message is generated according to the real self-interference and sent to a network device, so that the network device performs an interference avoidance operation according to the instruction message.