Type-Based Control Channel Precoding for Joint Channel Estimation
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Solution Overview
Problem
Existing technologies lack an effective solution for determining the encoding mode used by a sender to precode data of a control channel, particularly in Machine Type Communication (MTC) systems, where joint channel estimation by Cell-specific Reference Signal (CRS) and Demodulation Reference Signal (DMRS) requires the receiver to learn precoding matrix information.
Innovation Solution
A precoding processing method and apparatus that determines a precoding mode based on the type of control channel, using predefined or feedback precoding modes, and performs precoding processing accordingly, including methods for updating precoding codebooks based on physical resource blocks, subframes, and resource elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If joint channel estimation using CRS and DMRS is implemented to enhance MPDCCH performance, then channel estimation accuracy is improved, but the complexity of precoding information management increases because the receiver must learn precoding matrix information
Solution Approach 1:
The system enables the receiver to autonomously determine precoding matrix information by classifying control channel types and selecting appropriate codebooks based on predefined rules. The receiver serves itself by internally managing precoding information without requiring explicit signaling from the transmitter, thereby reducing overall system complexity while maintaining accurate channel estimation
Solution Approach 2:
The patent changes the parameter of precoding matrix selection by introducing different codebooks (first codebook for type 1/2 CSS, second codebook for USS) based on control channel type classification. This parameter change allows the system to adapt precoding information management to specific channel conditions and requirements, improving estimation accuracy while managing complexity through structured selection rules
2Device complexity
If a fixed precoding mode is used for all control channels, then device complexity is reduced, but adaptability to different control channel types deteriorates
Solution Approach 1:
The patent segments control channels into different types (type 1 CSS, type 2 CSS, and USS) and assigns different precoding codebooks to each segment. This segmentation allows the system to manage complexity through clear classification rules while achieving adaptability by optimizing precoding for each specific control channel type's characteristics and requirements
Solution Approach 2:
The system implements dynamic precoding mode selection where the precoding codebook is not fixed but changes based on the control channel type. The receiver dynamically determines which codebook to use by classifying the control channel type, enabling the system to adapt to different channel conditions and requirements without requiring complex explicit signaling
Data Source
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AI summary
The present disclosure provides a precoding processing method and apparatus for data, and a storage medium. The method includes: determining a precoding mode according to a type of a control channel, wherein the precoding mode at least includes one of: a predefined precoding mode or a feedback precoding mode; and performing precoding processing on data of the control channel according to the precoding mode. The described technical solution can be used to solve the problem in the related art concerning which encoding mode a sender uses to precode data of a control channel.