Power Configuration Parameters for Distributed MIMO Demodulation
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Solution Overview
Problem
In distributed MIMO systems, user equipment (UE) struggles to accurately demodulate data from multiple transmission points due to varying downlink data channel power configurations, as current methods only provide a single power configuration parameter, leading to incomplete power information for each transmission point.
Innovation Solution
A method where a first network device sends multiple power configuration parameters to a second network device, corresponding to multiple antenna port sets, allowing the UE to calculate and demodulate data from each antenna port set accurately, using higher or physical layer signaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a single power configuration parameter is provided to the UE, then the signaling overhead is reduced and the configuration is simplified, but the UE cannot accurately obtain the power of downlink data channels from multiple transmission points, leading to inaccurate demodulation
Solution Approach 1:
The power configuration parameters are segmented and separately configured for different transmission points. Each transmission point has its own power configuration parameter (e.g., p0-PDSCH), allowing the UE to independently determine the power of downlink data channels from each transmission point, thus resolving the contradiction between information completeness and configuration complexity.
Solution Approach 2:
Different power configuration parameters are assigned to different transmission points based on their local characteristics. This allows each transmission point to have optimized power settings suitable for its specific scenario, improving demodulation accuracy while maintaining manageable configuration complexity through localized optimization.
2Measurement precision
If multiple power configuration parameters are sent to the UE for multiple antenna port sets, then the demodulation accuracy is improved, but the signaling overhead and configuration complexity increase
Solution Approach 1:
The network pre-configures multiple power configuration parameters for different antenna port sets before data transmission. This preliminary configuration allows the UE to have all necessary power information available in advance for accurate demodulation of data from multiple transmission points, avoiding the need for dynamic signaling during data transmission.
Solution Approach 2:
The power configuration parameters are designed to be universally applicable across different antenna port sets and transmission points. Each parameter can be reused and referenced by multiple antenna ports, reducing the total number of parameters needed while still providing comprehensive power information for accurate demodulation.
Data Source
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AI summary
A power configuration method and a device are disclosed, so as to resolve a problem that UE cannot obtain power for sending data by a plurality of transmission points. The power configuration method includes: sending, by a first network device, M power configuration parameters to a second network device, where the M power configuration parameters are corresponding to M antenna port sets, at least one of the M antenna port sets belongs to the first network device, each power configuration parameter is used to calculate power of a downlink data channel between a corresponding antenna port set and the second network device, and M is an integer greater than or equal to 2.