Uplink Interference Control Using Reference Signal Measurement
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Solution Overview
Problem
In 5G communication systems, different frame structures used by different services lead to contradirectional interference, causing interference between terminal devices supporting different services.
Innovation Solution
A method involving a terminal device receiving reference signal information to determine interference channels and adjust transmission parameters to avoid energy radiation in interference directions, and a network device indicating reference signals to facilitate interference measurement and parameter adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different frame structures are used to serve different services (eMBB, mMTC, URLLC), then service requirements are met, but contradirectional interference occurs between terminal devices
Solution Approach 1:
The terminal device performs preliminary actions by measuring reference signals from adjacent terminal devices before transmitting uplink data. The network device indicates reference signal information in advance, allowing the terminal to obtain interference channel state information prior to actual transmission, enabling proactive interference avoidance through parameter adjustment
Solution Approach 2:
The system establishes a feedback mechanism where the terminal device measures reference signals, obtains interference channel state information, and adjusts transmission parameters accordingly. This closed-loop feedback allows continuous optimization of transmission to avoid interference while maintaining service requirements
2Quantity of substance
If spectrum resources are reused across different services, then spectrum utilization efficiency improves, but interference occurs in overlapping time-frequency resources
Solution Approach 1:
The patent converts the harmful interference into a beneficial resource by using the reference signal measurements to characterize the interference channel. The terminal device utilizes the measured interference information to adjust its transmission parameters, transforming what would be pure interference into actionable channel state information that enables cleaner spectrum sharing
Solution Approach 2:
The terminal device changes transmission parameters (such as precoding matrices or beam directions) based on the measured interference channel state information. By dynamically adjusting these parameters, the system can reuse spectrum resources more efficiently while minimizing interference through optimized spatial filtering
3Ease of operation
If terminal devices transmit without interference measurement, then transmission simplicity is maintained, but energy radiation in interference directions cannot be avoided
Solution Approach 1:
The terminal device performs preliminary reference signal measurement and interference channel state information acquisition before actual data transmission. This preliminary action enables the terminal to determine optimal transmission parameters that avoid interference directions, preventing energy radiation toward adjacent terminals while maintaining operational simplicity through automated parameter selection
Data Source
AI summary
In an interference control method, a first network device sends first indication information to a first terminal device, where the first indication information indicates a first reference signal (RS). The first terminal device obtains, based on measurement on the first RS, first interference information corresponding to the first RS, determines a first transmission parameter based on the first interference information, and sends uplink information to the first network device on a first time-frequency resource based on the first transmission parameter.