Transmitter Node Reference Signal Delay for Beam Selection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems face inefficiencies in beam selection due to the use of single-polarized reference signals, which can lead to erroneous beam selection and sub-optimal resource management.
Innovation Solution
A method where a transmitter node transmits a reference signal sequence using a first antenna port and a delayed version of the reference signal sequence using another antenna port, both on the same carrier frequency, with a non-zero delay less than a symbol duration, allowing receiver nodes to estimate channel capacity more accurately without additional resource consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If single-polarized reference signals are used for beam selection, then resource consumption is reduced, but beam selection accuracy deteriorates
Solution Approach 1:
The patent combines multiple polarized reference signals (first polarized reference signal and second polarized reference signal with orthogonal polarization) into a single time-frequency resource. The transmitter transmits both polarized signals simultaneously on the same time-frequency resource, allowing the receiver to combine measurements from both polarizations to obtain more accurate beam selection information without consuming additional resources.
Solution Approach 2:
The patent introduces polarization as an additional dimension to the reference signal transmission. Instead of transmitting only single-polarized signals, the system transmits reference signals with different polarizations (e.g., horizontal and vertical) on the same time-frequency resource. This dimensional expansion allows the receiver to capture channel characteristics across multiple polarization dimensions, improving beam selection accuracy without requiring separate time-frequency resources for each polarization.
2Measurement precision
If dual-polarized reference signals are transmitted on separate time-frequency occasions, then beam selection accuracy is improved, but latency increases
Solution Approach 1:
The patent merges the transmission of first and second polarized reference signals into a single time-frequency resource. Instead of transmitting polarized signals on separate time-frequency occasions as in conventional approaches, the system transmits both polarized reference signals simultaneously on the same time-frequency resource, eliminating the sequential transmission overhead and reducing latency while maintaining improved beam selection accuracy.
3Measurement precision
If dual-polarized reference signals are transmitted using additional resources, then beam selection accuracy is improved, but radio resource management efficiency deteriorates
Solution Approach 1:
The patent merges multiple polarized reference signals into a single time-frequency resource, avoiding the need for additional resources. The transmitter is configured to transmit both the first polarized reference signal and the second polarized reference signal on the same time-frequency resource, which improves beam selection accuracy while maintaining radio resource management efficiency by not consuming extra resources.
Solution Approach 2:
The patent makes the time-frequency resource universal by enabling it to carry multiple polarized reference signals simultaneously. The same time-frequency resource that would traditionally carry only a single reference signal is now designed to carry multiple polarized signals, making the resource more versatile and efficient. This multi-functionality allows the system to obtain dual-polarized channel information without requiring dedicated additional resources.
Data Source
AI summary
Disclosed is a method performed by a transmitter node of a communication system, for transmitting reference signalling. The method comprises transmitting, to one or more receiver nodes of the communication system, a reference signal sequence using a first antenna port and a carrier frequency. The method comprises transmitting, to the one or more receiver nodes, using another antenna port and the same carrier frequency, a delayed version of the reference signal sequence. The delay is non-zero and less than a symbol duration of the communication system.