Control Channel Resource Element Sets for Accurate Channel Estimation
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Solution Overview
Problem
Existing communication systems waste resources due to excessive reference signal density in control channels, leading to reduced channel estimation accuracy.
Innovation Solution
Configure control channels with flexible resource element sets, allowing for efficient mapping of control information and reference signals, thereby increasing the number of reference signals used in channel estimation without increasing density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If reference signals are distributed in the entire time-frequency resource area where control information is located, then channel estimation can be performed, but reference signal density becomes excessively high causing resource waste
Solution Approach 1:
The patent segments the time-frequency resource area into multiple resource element sets, each containing a subset of reference signals. Instead of using all reference signals uniformly across the entire control channel bandwidth, the terminal device is configured to select and use only specific resource element sets for channel estimation. This segmentation allows the system to maintain sufficient channel estimation accuracy while reducing the overall density and resource consumption of reference signals.
2Loss of energy
If the quantity of reference signals in a physical resource block is reduced to avoid resource waste, then resource efficiency improves, but channel estimation accuracy is reduced
Solution Approach 1:
The patent introduces dynamic configurability where the network device can flexibly configure which resource element sets are used for channel estimation based on actual channel conditions, terminal capabilities, and traffic requirements. This dynamic approach allows the system to adapt the reference signal quantity and distribution to match actual needs, improving resource efficiency when channel conditions permit while maintaining accuracy when needed.
Solution Approach 2:
The patent changes the parameter of reference signal distribution by introducing resource element set configurations that specify different time-frequency locations and densities. Instead of a fixed uniform distribution, the system can adjust the density and placement of reference signals in different resource element sets, allowing optimization of both resource efficiency and channel estimation accuracy through parameter adjustment.
3Measurement precision
If reference signal density is increased to improve channel estimation accuracy, then estimation precision improves, but resource waste increases
Solution Approach 1:
The patent applies local quality by allowing different resource element sets to have different reference signal densities and configurations tailored to local channel conditions. Instead of uniformly increasing reference signal density across the entire control channel, the system can concentrate reference signals in specific resource element sets where they are most needed, achieving high channel estimation accuracy in critical areas while minimizing overall resource consumption.
Data Source
AI summary
A control information transmission method, apparatus, and systems are disclosed. An example method includes: determining configuration information of a control channel, wherein the configuration information comprises at least one of frequency domain information or time domain information, the at least one of frequency domain information or time domain information indicates a time-frequency resource occupied by the control channel, and the configuration information further comprises indication information indicating a quantity of at least one resource element set, wherein the time-frequency resource occupied by the control channel comprises the at least one resource element set; mapping control information to one or more of the at least one resource element set based on the configuration information; sending the configuration information to a terminal device; and sending the control information to the terminal device.