Base Station SINR Correction for Multi-User MIMO Scheduling
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Solution Overview
Problem
Existing multi-user MIMO systems face challenges in accurately predicting and correcting reception SINR due to frequent changes in the combination of radio terminals for spatial multiplexing, leading to decreased throughput and inefficient spectrum usage.
Innovation Solution
A base station system that stores and updates correction parameters for each radio terminal, selects appropriate correction values based on the combination of spatially multiplexed terminals, and adjusts these parameters based on transmission success or failure to improve SINR accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single correction value is used for all radio terminals regardless of spatial multiplexing combination, then the system complexity is reduced, but the accuracy of reception SINR prediction deteriorates when terminal combinations change frequently
Solution Approach 1:
The patent segments the single correction value into multiple correction values, with each correction value corresponding to a specific combination of spatially multiplexed radio terminals. This segmentation allows the system to select the appropriate correction value based on the current terminal combination, thereby maintaining high reception SINR prediction accuracy without excessive complexity.
Solution Approach 2:
The patent implements a dynamic correction value selection mechanism where the base station selects different correction values based on the current combination of spatially multiplexed radio terminals. This dynamic adaptation ensures that the most accurate correction value is always used for the current terminal configuration, resolving the contradiction between complexity and accuracy.
2Measurement precision
If multiple correction values are stored for different terminal combinations, then the reception SINR prediction accuracy is improved, but the memory storage requirements and system complexity increase
Solution Approach 1:
The patent pre-calculates and stores correction values for various possible terminal combinations before actual transmission occurs. By performing this correction value preparation in advance, the system avoids the need for complex real-time calculations when terminal combinations change, thus improving reception SINR prediction accuracy while managing storage requirements efficiently.
Solution Approach 2:
The patent changes the parameter organization from a single correction value to multiple correction values indexed by terminal combination. This parameter change allows the system to efficiently store and retrieve the appropriate correction value based on the current terminal configuration, balancing accuracy improvement with manageable storage requirements.
3Adaptability or versatility
If correction values are frequently updated to adapt to changing terminal combinations, then the adaptability to different spatial multiplexing scenarios is improved, but the processing overhead and time consumption increase
Solution Approach 1:
The patent performs correction value calculations and selections in advance, preparing correction values for multiple possible terminal combinations before transmission. This preliminary action reduces the real-time processing overhead when terminal combinations change, as the base station can simply select from pre-prepared correction values rather than calculating new ones, thus improving adaptability while minimizing time loss.
Solution Approach 2:
The patent applies different correction values locally to different terminal combinations rather than using a single global correction value. This local quality approach allows the system to adapt to specific terminal combination characteristics without requiring comprehensive updates across all possible combinations, reducing processing overhead while maintaining high adaptability.
Data Source
AI summary
A base station, a method for a base station, and a program capable of appropriately selecting radio terminals for which spatial multiplexing is performed and an MCS, and thereby increasing throughput in multi-user MIMO are provided. A base station 11 according to the present disclosure includes: a correction parameter storage unit 1141 configured to store a plurality of correction parameters for each of a plurality of radio terminals 12, the plurality of correction parameters being provided for each of the radio terminals 12; a correction parameter selection unit 1131 configured to select a predetermined correction parameter from among the plurality of correction parameters based on a combination of radio terminals 12 that are spatially multiplexed in the same radio resource; a correction value calculation unit 1132 configured to calculate a correction value of the radio terminal 12 based on the predetermined correction parameter.