O-RAN O-RU Measurement Device IQ Power Subcarrier Calculation
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Solution Overview
Problem
Conducting conformance tests for O-RAN standards is complicated due to the need to distinguish between defects in the O-RU and measurement device settings, particularly in calculating IQ signal powers and debugging efficiency.
Innovation Solution
A measurement device that includes an O-DU Emulator, power measurement instruments, a control unit, and a display unit, capable of calculating and displaying IQ power levels per subcarrier and total IQ power levels, aiding in the identification of defects during O-RAN standard conformance tests.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the power of the IQ signal is calculated using multiple setting parameters one by one, then the power value can be obtained, but the calculation process becomes complicated and time-consuming
Solution Approach 1:
The patent combines multiple setting parameters (total IQ power level and number of subcarriers) into a single integrated calculation process within the control unit. Instead of calculating each parameter separately and manually, the control unit automatically computes the IQ power level per subcarrier by merging these parameters in one operation, thereby simplifying the calculation process while maintaining precision.
Solution Approach 2:
The measurement device performs self-service by having its control unit automatically calculate the IQ power level per subcarrier using the stored setting parameters. This eliminates the need for external manual calculations or additional measurement equipment, as the device serves itself by deriving the required power values from its own internal parameters.
2Reliability
If both total power level and per-subcarrier power level are calculated and checked, then the power settings can be verified, but the debugging efficiency decreases due to the complexity of checking both values
Solution Approach 1:
The measurement device implements feedback by displaying both the total IQ power level and the IQ power level per subcarrier on its display unit. This provides immediate visual feedback to the operator, allowing verification of power settings without manual calculation or external tools. The feedback mechanism ensures reliability by showing both aggregate and individual values simultaneously, while maintaining productivity through automated presentation.
Solution Approach 2:
The control unit serves multiple functions: it stores setting parameters, calculates total IQ power level, calculates per-subcarrier IQ power level, and manages display output. This multi-functionality allows the device to verify both total and individual power levels within a single integrated system, eliminating the need for separate measurement devices or manual verification processes.
3Measurement precision
If multiple devices are used to measure power per subcarrier and total power, then comprehensive measurement is achieved, but the complexity of confirming display values on each device increases
Solution Approach 1:
The patent merges the functions of multiple measurement devices into a single integrated measurement device. The control unit consolidates the capabilities of separate power measurement instruments, combining total power measurement and per-subcarrier power measurement into one unified system. This reduces the number of devices needed while maintaining comprehensive measurement capabilities.
Solution Approach 2:
The measurement device achieves universality by incorporating multiple measurement functions within a single device. The power measurement instrument can measure both total power across all subcarriers and individual power per subcarrier, eliminating the need for specialized separate devices. This multi-functional approach simplifies the measurement system while maintaining measurement precision.
Data Source
AI summary
The measurement device that measures the performance of an O-RU constituting a base station of an O-RAN that performs orthogonal frequency division multiplexing radio communication includes: an O-DU Emulator that emulates the O-DU of the base station and transmits IQ packets for DL test to the O-RU through the fronthaul; a power measurement instrument that measures the power per one subcarrier and the total power of all subcarriers that measures the power of the RF signal generated and outputted based on the IQ packet received by the O-RU; a control unit that calculates the IQ power level per one subcarrier in the IQ packet based on the set value of the total IQ power level of all subcarriers in the IQ packet; and a display unit that displays the IQ power level per one subcarrier calculated by the control unit.