CSI-RS Power Adaptation for Energy-Efficient Downlink Measurement
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Solution Overview
Problem
The increased power consumption of 5G base stations due to higher antenna density and bandwidth requirements poses a challenge, necessitating efficient energy-saving techniques to reduce operational costs and carbon emissions.
Innovation Solution
Dynamic control of transmission power for downlink signals such as SSB and CSI-RS, adjusting power levels based on communication states and data volume to optimize energy usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If transmission power of downlink signals is dynamically adjusted to save energy, then base station power consumption is reduced, but measurement accuracy of channel state information may deteriorate
Solution Approach 1:
The patent applies dynamics by making the transmission power of CSI-RS signals variable rather than fixed. The base station dynamically adjusts the transmission power based on communication states and data volume, allowing the system to adapt to changing conditions and reduce energy consumption while maintaining measurement accuracy through intelligent power control.
Solution Approach 2:
The patent changes the transmission power parameter of CSI-RS signals dynamically. By varying the power level based on communication state and data volume, the system optimizes energy efficiency while ensuring that sufficient power is maintained for accurate channel state information measurement, thus resolving the contradiction between energy saving and measurement accuracy.
2Reliability
If higher transmission power is used to maintain communication quality, then communication reliability is improved, but energy consumption increases
Solution Approach 1:
The system dynamically adjusts transmission power based on real-time communication state and data volume conditions. When communication quality is sufficient at lower power levels, the system reduces power consumption; when higher power is needed for reliability, it increases power accordingly. This dynamic adaptation resolves the contradiction between reliability and energy consumption.
Solution Approach 2:
The base station uses feedback about communication state and data volume to determine appropriate transmission power levels. This feedback mechanism allows the system to maintain communication quality and reliability while minimizing energy consumption by adjusting power levels based on actual network conditions rather than using constant high power.
3Reliability
If CSI-RS measurement is performed continuously, then channel state information is always available, but measurement time and processing resources are consumed
Solution Approach 1:
Instead of continuous measurement, the system performs CSI-RS measurement periodically or on-demand based on communication state changes. The measurement is triggered when necessary (e.g., when power adjustment occurs or communication state changes) rather than continuously, reducing measurement time and processing resources while maintaining reliable channel state information availability when needed.
Data Source
AI summary
Disclosed is a method for measuring channel state information (CSI) by a terminal in a wireless communication system. In particular, the method comprises: receiving first information related to a first transmission power of a CSI-reference signal (CSI-RS); receiving the CSI-RS; and starting measurement of first CSI on the basis of the first transmission power and the CSI-RS, wherein second CSI is measured on the basis of the CSI-RS and a second transmission power, on the basis of receiving second information related to the second transmission power of the CSI-RS that has a different value from the first transmission power.