FD-MIMO CSI-RS Dimensional Segmentation for Resource Efficiency
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Solution Overview
Problem
In Full Dimension MIMO (FD-MIMO) systems with a large number of transmit antennas, the existing channel state information (CSI) reference signal (CSI-RS) transmission method leads to excessive radio resource allocation, resulting in a shortage of resources for data transmission and reduced system throughput.
Innovation Solution
The method involves configuring CSI-RS transmission in multiple dimensions, allowing the base station to transmit CSI-RSs in both horizontal and vertical directions using a reduced number of antenna ports, enabling efficient channel measurement and feedback reporting by the terminal without excessive radio resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If CSI-RS transmission is performed using a large number of antenna ports in FD-MIMO systems, then channel measurement accuracy is improved, but radio resource consumption increases excessively
Solution Approach 1:
The patent divides the channel measurement process into two separate measurements: one for the first channel (e.g., horizontal dimension) and one for the second channel (e.g., vertical dimension). Each measurement uses a reduced number of antenna ports corresponding to one dimension, rather than using all antenna ports simultaneously. This segmentation allows accurate channel measurement while reducing the radio resources required for CSI-RS transmission.
2Loss of information
If radio resources are allocated for CSI-RS transmission in existing methods, then channel state information can be obtained, but resources for data transmission become insufficient
Solution Approach 1:
By segmenting the channel measurement into two separate measurements using reduced antenna ports, the patent reduces the radio resources consumed by CSI-RS transmission. This frees up more radio resources for data transmission, thereby increasing system throughput while still acquiring the necessary channel state information through combined results of both measurements.
3Quantity of substance
If the number of antenna ports for CSI-RS is reduced, then radio resource allocation is optimized, but channel measurement capability may be compromised
Solution Approach 1:
The patent segments the overall channel measurement into two separate dimensional measurements. Each measurement uses a reduced number of antenna ports optimized for one dimension, achieving efficient radio resource allocation. The combination of results from both segmented measurements reconstructs the complete channel state information, maintaining measurement capability despite using fewer antenna ports in each individual measurement.
Solution Approach 2:
The patent introduces a dimensional decomposition approach, separating the antenna array into different dimensions (e.g., horizontal and vertical). By measuring each dimension separately with reduced antenna ports and then combining the results, the system achieves efficient resource allocation while preserving the ability to capture the full spatial channel characteristics through multi-dimensional measurement.
Data Source
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AI summary
A feedback information transmission/reception method for use in a mobile communication system is provided. The feedback information transmission method includes receiving configuration information on at least two reference signals and feedback configuration information for use in generating feedback information based on the at least two reference signals from a base station, receiving the at least two reference signals from the base station, measuring the at least two reference signals received, generating the feedback information based on the measurement result according to the feedback configuration information, and transmitting the feedback information to the base station.