Dual-Connectivity Terminal Sub-Band Interference Detection
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Solution Overview
Problem
In 5G networks, the interworking between LTE and NR cells in dual-connectivity mode faces challenges due to uplink signal interference with downlink signals, particularly when operating in different frequency bands, which affects coverage and data transmission reliability.
Innovation Solution
A method where a terminal device detects internal interference levels and usage priorities during simultaneous data transmission and reception across sub-bands in LTE and NR cells, reporting this information to the network side for dynamic sub-band allocation, allowing the network to select optimal sub-bands and reduce self-interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a terminal simultaneously operates at two or more carriers in different frequency bands to improve data transmission rate and service diversification, then productivity is improved, but uplink signals of these carriers interfere with downlink received signals of some carriers, causing reliability to deteriorate
Solution Approach 1:
The patent segments the frequency spectrum into multiple sub-bands and applies different interference processing strategies to each sub-band. The terminal device and network device separately determine and process interference levels for different sub-bands, allowing selective resource allocation that avoids self-interference while maintaining high data transmission rates across multiple carriers.
Solution Approach 2:
The patent dynamically changes the interference processing parameters based on detected interference levels. The terminal device detects internal interference levels in real-time and reports them to the network device, which then adjusts sub-band allocation and resource assignment parameters accordingly, transforming fixed interference management into adaptive parameter optimization.
2Productivity
If high frequency bands are used to expand spectrum availability for 5G, then productivity is improved, but coverage is limited and signal fading occurs faster, causing reliability to deteriorate
Solution Approach 1:
The patent applies local quality by treating different sub-bands with different interference characteristics differently. Instead of uniform interference processing across all frequency bands, the system identifies specific sub-bands with high interference levels and applies targeted interference mitigation strategies to those local regions, preserving the benefits of high-frequency spectrum while compensating for coverage limitations.
3Reliability
If sub-band specific interference processing is implemented to reduce self-interference, then reliability is improved, but device complexity increases due to additional detection and reporting mechanisms
Solution Approach 1:
The terminal device performs self-service by autonomously detecting internal interference levels across different sub-bands and generating reports to the network device. This self-detection capability eliminates the need for complex network-side interference measurement infrastructure, reducing overall system complexity while improving data demodulation performance through accurate interference awareness.
Data Source
AI summary
Disclosed are an interference processing method, a terminal device, a network device, and a computer storage medium. The method comprises: when a terminal device is in a dual-connection mode, detecting the internal interference level when at least one sub-band on a carrier of a first cell and a second cell transmit and receive data at the same time, wherein in the dual-connection mode, the terminal device can establish a connection with the first cell and the second cell; according to the internal interference level when the sub-band and the second cell transmit and receive data at the same time, determining the usage priority of the sub-band; and reporting the sub-band and the corresponding internal interference level and usage priority to a network side, wherein the internal interference level comprises at least one of the following: whether an internal interference indication and an internal interference grade exist.