Downlink Reference Signal Time-Frequency Structure Adaptation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In 5G wireless communication systems, the downlink reference signal occupies more resources, limiting the efficient use of physical resources due to differences in cyclic prefix, carrier frequency, and subcarrier width, which affects demodulation performance.
Innovation Solution
A method and apparatus for determining a time-frequency structure of a downlink reference signal, allowing terminals to efficiently receive the signal by optimizing resource allocation based on specific conditions such as subframe length, subcarrier width, and carrier frequency, thereby optimizing resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the downlink reference signal occupies more resources to ensure demodulation performance, then the reliability of signal reception is improved, but the resource utilization efficiency deteriorates
Solution Approach 1:
The patent applies dynamics by making the reference signal configuration adaptable to different OFDM symbol types. The terminal determines the time-frequency structure of downlink reference signals based on whether the OFDM symbol is a normal symbol or a mini-slot symbol, allowing the system to dynamically adjust resource allocation rather than using a fixed configuration. This resolves the contradiction by optimizing reference signal resources according to actual transmission needs.
Solution Approach 2:
The patent changes parameters by adjusting the time-frequency structure of reference signals based on different OFDM symbol characteristics. Specifically, the terminal determines reference signal positions and resource allocation differently for normal symbols versus mini-slot symbols, changing the temporal and spectral parameters of reference signal placement to match the underlying data transmission structure, thereby improving both reliability and resource efficiency.
2Productivity
If the time-frequency structure of downlink reference signal is optimized for different OFDM symbol characteristics, then the resource allocation efficiency is improved, but the device complexity increases
Solution Approach 1:
The patent applies preliminary action by having the terminal determine the OFDM symbol type (normal or mini-slot) before allocating reference signal resources. The base station also pre-configures the terminal with the necessary parameters through higher-layer signaling, allowing the terminal to efficiently determine reference signal structures without complex real-time calculations during reception processing.
Data Source
AI summary
The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). A method for operating a terminal in a wireless communication system, the method comprises determining a time-frequency structure of a downlink reference signal, and receiving, from a base station, the downlink reference signal according to the time-frequency structure.