Demodulation Reference Signal Configuration for Wireless Resource Efficiency
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Solution Overview
Problem
The increasing number of user equipment (UEs) and data/control information to be served by a base station within limited radio resources necessitates an efficient method for transmitting and receiving uplink/downlink data and control information, particularly in scenarios where the reference signal used for signal restoration is also limited.
Innovation Solution
The method involves transmitting a demodulation reference signal using multiple configurations differing in density or location within the time-frequency resource region, with the base station indicating the appropriate configuration to the user equipment, allowing for efficient demodulation of downlink signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the density of demodulation reference signals is increased to improve signal restoration accuracy, then measurement precision is improved, but loss of substance worsens due to more reference signal resources consuming limited radio resources
Solution Approach 1:
The patent applies local quality by configuring different demodulation reference signal densities in different time-frequency resource regions. Specifically, the base station transmits indication information specifying which resource regions use high-density reference signals and which use low-density reference signals, allowing signal restoration accuracy to be improved only where needed while conserving radio resources in other regions.
2Adaptability or versatility
If multiple demodulation reference signal configurations are transmitted to all user equipment, then adaptability is improved, but device complexity worsens due to increased processing requirements
Solution Approach 1:
The patent applies segmentation by dividing user equipment into different groups based on their service requirements. The base station transmits indication information that applies different demodulation reference signal configurations to different resource regions for different user equipment groups. This allows adaptability to be improved through multiple configurations while reducing processing complexity by not requiring all user equipment to process all possible configurations simultaneously.
Data Source
AI summary
In the present invention, a demodulation reference signal is transmitted using a plurality of settings in which demodulation reference signals occupy different positions in at least a density or time-frequency resource region of the demodulation reference signals. A base station can transmit, to the user device, information indicating a setting related to a downlink signal or a setting related to an uplink signal from among the plurality of settings, and the user device can receive the demodulation reference signal with the downlink signal or transmit the demodulation reference signal With the uplink signal according to the indicated setting.