Base Station Channel Allocation Using Multiple CSI Reports
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Solution Overview
Problem
Current non-orthogonal multiple access technologies in 5G communication systems are limited in increasing the number of terminals that can share the same wireless channel, which restricts frequency capacity and efficiency.
Innovation Solution
The method involves determining and transmitting two or more channel state information from terminals to a base station, allowing for the grouping of terminals with similar precoding matrix indices and channel quality indicators, enabling the allocation of the same wireless channel to a larger number of terminals, thereby enhancing frequency efficiency and capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If non-orthogonal multiple access technology allocates the same wireless channel to multiple terminals, then frequency efficiency is improved, but the number of terminals that can be supported is limited
Solution Approach 1:
The invention segments the channel state information feedback into multiple independent CSI reports, each corresponding to different channel conditions or precoding matrices. This segmentation allows the base station to identify and group more terminals with similar channel characteristics, thereby increasing the number of terminals that can share the same wireless channel while maintaining frequency efficiency.
Solution Approach 2:
The invention introduces an additional dimension by transmitting multiple channel state information reports instead of a single CSI. This multi-dimensional CSI approach enables more granular terminal grouping and matching, allowing the system to support a larger number of terminals on the same frequency resources by finding suitable matches across multiple CSI dimensions.
2Quantity of substance
If two or more channel state information are transmitted from terminal to base station, then the number of terminals that can share wireless channel increases, but device complexity increases
Solution Approach 1:
The terminal performs preliminary actions by pre-calculating and storing multiple channel state information reports before transmission. These CSI reports are prepared in advance based on different channel conditions or precoding matrices, allowing the base station to efficiently perform terminal grouping without requiring complex real-time calculations, thus reducing overall system complexity.
Solution Approach 2:
The invention uses copying by transmitting multiple copies of channel state information corresponding to different channel conditions or precoding matrices. Instead of implementing complex real-time channel analysis at the base station, the system relies on pre-computed CSI copies that can be easily compared and matched for terminal grouping, thereby reducing device complexity.
3Quantity of substance
If the same wireless channel is overlappingly allocated in the cell, then frequency capacity is improved, but interference management becomes more difficult
Solution Approach 1:
The invention implements a feedback mechanism where terminals transmit multiple channel state information reports to the base station. The base station uses this feedback to identify terminals with similar channel characteristics and groups them together for same-channel allocation. This feedback-driven approach enables intelligent interference management by ensuring that grouped terminals have compatible channel conditions, thereby reducing interference while maintaining high frequency capacity.
Solution Approach 2:
The invention changes the parameter of channel state information from a single value to multiple values (multiple CSI reports). This parameter change enables more precise terminal characterization and matching, allowing the base station to make better-informed decisions about terminal grouping and resource allocation, thereby managing interference more effectively while maximizing frequency capacity.
Data Source
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AI summary
The present disclosure proposes a base station device, a terminal, and a method for allocating a wireless channel in which a base station device receives two or more channel state information from each of terminals in a cell in a wireless environment that overlappingly allocates the same wireless channel (frequency and time resources) in the same cell, so it is possible to perform redundant physical downlink allocation transmission based on the same precoding, whereby it is possible to improve wireless efficiency and cell capacitance.