Uplink Precoder Control for 8-Port Partial-Coherent Transmission
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Solution Overview
Problem
Existing communication standards inhibit efficient UL transmission with more than four antenna ports due to unified designs that may suppress communication throughput by increasing bit size of downlink control information and not allowing individual preferable configurations for the precoding matrix.
Innovation Solution
A terminal and base station design that includes a receiving section for downlink control information and a control section to judge an 8-port partial-coherent precoder for UL transmission, utilizing a 4-port precoder per layer to manage more than four antenna ports effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a unified design for precoding matrix table and downlink control information notification is implemented, then system compatibility and ease of operation are improved, but the bit size of downlink control information increases and communication throughput is suppressed
Solution Approach 1:
The patent segments the precoding matrix table into multiple tables (first precoding matrix table for first set of antenna ports, second precoding matrix table for second set of antenna ports) rather than using a single unified table. This segmentation allows each table to be optimized for specific antenna port configurations, reducing the overall information overhead while maintaining system compatibility.
Solution Approach 2:
The patent introduces dynamic selection mechanisms where the terminal can switch between different precoding matrix tables based on the number of antenna ports configured. The system dynamically adapts the precoding configuration rather than using a static unified design, allowing optimization for different transmission scenarios without increasing control information bit size.
2Adaptability or versatility
If a unified design for downlink control information notification is implemented, then system compatibility is improved, but the bit size of downlink control information increases
Solution Approach 1:
The patent segments the precoding matrix indication into multiple independent fields (first precoding matrix indication field, second precoding matrix indication field) corresponding to different antenna port sets. This segmentation reduces the total bit size required compared to a unified indication field, while maintaining the ability to indicate different precoding matrices for different antenna configurations.
Solution Approach 2:
The patent applies different precoding matrix tables and indication methods to different sets of antenna ports based on their specific characteristics. The first precoding matrix table is optimized for first set antenna ports while the second table is optimized for second set antenna ports, allowing local optimization without compromising overall system compatibility.
3Ease of operation
If unified design for precoding matrix table is implemented, then ease of operation is improved, but individual preferable configurations for precoding matrix are inhibited
Solution Approach 1:
The patent divides the precoding matrix configuration into multiple independent tables and fields, allowing each to be individually optimized for specific antenna port configurations. This segmentation enables individual preferable configurations for different antenna sets while maintaining ease of operation through standardized table structures.
Solution Approach 2:
The patent allows different precoding matrix tables to be configured for different sets of antenna ports, enabling local optimization for specific transmission scenarios. Each table can contain precoding matrices optimized for its corresponding antenna configuration, providing adaptability while maintaining operational simplicity.
Data Source
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AI summary
A terminal according to an aspect of the present disclosure includes: a receiving section that receives downlink control information including information related to a codebook subset indicating a 4-port precoder per layer; and a control section that judges, based on the 4-port precoder indicated by the information, an 8-port partial-coherent precoder for an uplink transmission, wherein the downlink control information includes a field corresponding to rank 0. An aspect of the present disclosure enables UL transmission using more than four antenna ports to be appropriately controlled.