Reference Signal Mapping for Wireless Resource Efficiency
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Solution Overview
Problem
Current wireless communication systems require a large quantity of resources to place reference signals on each symbol of the air interface, leading to resource wastage in signal transmission due to phase noise, frequency offset, and other factors.
Innovation Solution
A method and apparatus for mapping a reference signal that reduces resource usage by mapping a target-class signal to specific symbols for phase noise estimation, allowing the reference signal to be placed on only some symbols, ensuring orthogonality between antenna ports through multiplexing techniques, and using cell-specific or user-specific parameters for scrambling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If reference signals are placed on each symbol on the air interface resource, then parameter estimation accuracy is improved, but resource consumption increases
Solution Approach 1:
The patent segments the air interface resources into different types (target-class symbols and other symbols) and applies different signal mapping strategies to each segment. Reference signals are mapped only to other symbols while target-class symbols use target-class signals, thereby reducing overall resource consumption while maintaining estimation accuracy through selective reference signal placement.
Solution Approach 2:
The patent makes target-class signals multi-functional by designing them to serve both as data carriers and as signals for parameter estimation. This allows the system to reduce reference signal overhead while maintaining estimation capabilities, as the target-class signals can be used for parameter estimation in place of dedicated reference signals on target-class symbols.
2Reliability
If reference signals are placed on all symbols, then signal transmission reliability is improved, but resource efficiency deteriorates
Solution Approach 1:
The patent segments symbols into target-class symbols and other symbols, applying different signal mapping strategies. Reference signals are placed only on other symbols while target-class symbols use target-class signals with embedded estimation capabilities, maintaining transmission reliability through diversified signal sources while improving resource efficiency by avoiding redundant reference signals.
Solution Approach 2:
The patent changes the functional parameters of target-class signals to enable them to serve dual purposes: data transmission and parameter estimation. By modifying the target-class signal structure and mapping strategy, the system maintains reliability through multiple signal types while improving resource efficiency by reducing reference signal overhead.
Data Source
AI summary
A method and an apparatus for mapping a reference signal. The method includes: mapping a target-class signal to a target symbol, where the target symbol is some symbols in a first symbol set on a time-frequency resource block, the first symbol set is a set of some symbols or all symbols on the time-frequency resource block, the target-class signal has at least two functions, and the at least two functions include a function of estimating a parameter that affects signal transmission; and mapping the reference signal to a symbol in the first symbol set other than the target symbol, where the reference signal has the function of estimating a parameter that affects signal transmission.