Dynamic Reference Signal Arrangement for Channel Estimation
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Solution Overview
Problem
Current communication systems face challenges in flexibly configuring reference signals (RS) to adapt to different scenarios and transmission requirements, leading to suboptimal performance in high-speed and high-frequency environments due to fixed mapping manners and single functions.
Innovation Solution
The method involves dynamically configuring the arrangement manner of RS using frequency division, time division, frequency division + code division, or time division + code division multiplexing, allowing the base station to select the most suitable arrangement based on channel changes and transmission conditions, thereby enhancing channel estimation precision and data transmission reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed reference signal mapping manner is used, then system complexity is reduced, but adaptability to different communication scenarios deteriorates
Solution Approach 1:
The patent applies dynamics by enabling the reference signal mapping manner to be dynamically selected based on communication scenarios. The base station determines the appropriate mapping manner (first or second) according to scenario characteristics, allowing the system to adapt between fixed and flexible configurations rather than being statically bound to one approach.
Solution Approach 2:
The patent implements universality by designing a reference signal mapping system that can perform multiple functions through different mapping manners. The same reference signal resource can be mapped using either the first mapping manner (for scenarios requiring simplicity) or the second mapping manner (for scenarios requiring flexibility), making the system universally applicable across diverse communication conditions.
2Device complexity
If a single-function reference signal configuration is used, then configuration complexity is reduced, but performance in high-speed and high-frequency environments deteriorates
Solution Approach 1:
The patent applies local quality by configuring reference signals with different mapping manners suited to local scenario characteristics. In high-speed and high-frequency environments, the second mapping manner is selected to provide local optimization for those specific conditions, while other scenarios can use the simpler first mapping manner, thereby achieving local quality enhancement without universal complexity.
3Measurement precision
If reference signals are densely mapped to improve channel estimation precision, then channel estimation precision is improved, but resource overhead increases
Solution Approach 1:
The patent applies parameter changes by varying the reference signal mapping density and pattern based on channel conditions and scenario requirements. The system can adjust mapping parameters such as resource element positions and densities dynamically, allowing optimization of channel estimation precision while controlling resource overhead through parameter adjustment rather than fixed dense mapping.
Data Source
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AI summary
This application discloses an indication method and apparatus, to support a requirement of a complex and fickle scenario. The method includes: generating and sending an arrangement indication used to indicate an arrangement manner of a reference signal, where the reference signal occupies at least one group of time frequency resources, and the arrangement manner is frequency division, time division, frequency division + code division, or time division + code division; in the frequency division manner, each group of time frequency resources occupy a symbol in time domain and at least one contiguous subcarrier in frequency domain; in the time division manner, each group of time frequency resources occupy at least one contiguous symbol in time domain and a subcarrier in frequency domain; in the frequency division + code division manner, each group of time frequency resources occupy a symbol in time domain and at least one contiguous subcarrier in frequency domain, and the reference signal is multiplexed on the group of time frequency resources by using an orthogonal code corresponding to the reference signal; and in the time division + code division manner, each group of time frequency resources occupy at least one contiguous symbol in time domain and a subcarrier in frequency domain, and the reference signal is multiplexed on the group of time frequency resources by using an orthogonal code corresponding to the reference signal.