RS-SINR Measurement Subframe Indication for Interference Management
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Solution Overview
Problem
In 3GPP LTE wireless communication systems, there is a need for efficient methods to perform reference signal signal-to-interference and noise ratio (RS-SINR) measurements, particularly in scenarios involving enhanced inter-cell interference coordination and small cell on/off scenarios, to manage interference and optimize user packet throughput.
Innovation Solution
A method and apparatus for measuring RS-SINR in wireless communication systems, where a user equipment (UE) receives an indication of specific subframes from the network for performing RS-SINR measurements, allowing for efficient load distribution among multiple carriers by conducting these measurements in designated subframes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If RS-SINR measurements are performed in all subframes, then measurement precision is improved, but device complexity and energy consumption increase
Solution Approach 1:
The measurement process is segmented by dividing subframes into two categories: certain subframes (indicated by higher layer signaling) for RS-SINR measurements and other subframes for normal operations. This segmentation allows the UE to perform measurements only in specific subframes, reducing overall measurement complexity while maintaining precision in the designated measurement opportunities.
Solution Approach 2:
RS-SINR measurements are performed periodically in certain subframes that are indicated by higher layer signaling rather than continuously in all subframes. This periodic measurement approach reduces the frequency of measurements, thereby lowering device complexity and energy consumption while still providing sufficient measurement precision for network optimization.
2Measurement precision
If RS-SINR measurements are performed continuously, then measurement precision is improved, but use of energy increases
Solution Approach 1:
The UE performs RS-SINR measurements periodically in certain subframes indicated by higher layer signaling rather than continuously. This periodic measurement scheme significantly reduces energy consumption by limiting measurements to specific subframes while maintaining adequate measurement precision for network conditions assessment.
Solution Approach 2:
The measurement time is segmented into measurement subframes (certain subframes) and non-measurement subframes. By confining measurements to only the certain subframes, the UE reduces its energy consumption while still obtaining necessary RS-SINR data for network optimization decisions.
3Productivity
If small cells are kept on to improve user packet throughput, then interference increases
Solution Approach 1:
The system uses RS-SINR measurements performed in certain subframes to provide feedback information about interference conditions. Based on this feedback, the network can dynamically adjust small cell configurations, turning off small cells when interference is high and turning them on when interference is low, thereby optimizing user packet throughput while managing interference levels.
Solution Approach 2:
The small cell configuration is made dynamic rather than static. Small cells can be turned on or off based on real-time RS-SINR measurement results obtained in certain subframes. This dynamic adjustment allows the system to maximize user packet throughput by activating small cells when conditions are favorable while minimizing interference by deactivating them when conditions are unfavorable.
Data Source
AI summary
A method and apparatus for performing reference signal signal-to-interference and noise ratio (RS-SINR) measurements in a wireless communication system is provided. A user equipment (UE) receives an indication of certain subframes for performing RS-SINR measurements from a network via a higher layer, and performs the RS-SINR measurements in the certain subframes.