Full-Duplex Reference Signal Configuration for Self-Interference Mitigation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face challenges in configuring full-duplex communications effectively, particularly in managing self-interference and optimizing resource element configurations for accurate transport block size computation.
Innovation Solution
The solution involves configuring reference signals differently for time periods supporting full-duplex wireless communications, allowing for a more dense or non-uniform allocation of resource elements to improve signal quality and reduce self-interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a uniform allocation of resource elements is used for reference signals, then the configuration is simple and easy to implement, but the signal quality deteriorates and self-interference increases in full-duplex communications
Solution Approach 1:
The patent applies local quality by configuring reference signals with different densities in different frequency regions. Specifically, a first reference signal configuration with higher density is used in frequency regions closer to uplink communications, while a second reference signal configuration with lower density is used in frequency regions farther from uplink communications. This localized differentiation improves signal quality where self-interference is strongest while maintaining overall system efficiency.
2Reliability
If a dense allocation of resource elements is used for reference signals, then the signal quality improves, but the computation of transport block size becomes inaccurate
Solution Approach 1:
The patent changes the parameter of reference signal density based on frequency region and full-duplex operation mode. By dynamically adjusting the reference signal configuration parameters (first configuration for regions near uplink, second configuration for regions far from uplink), the system achieves both improved signal quality and accurate transport block size computation, as the density is optimized for each specific frequency region's interference characteristics.
3Productivity
If full-duplex communications are supported, then spectral efficiency improves, but self-interference increases
Solution Approach 1:
The patent addresses self-interference in full-duplex communications by applying local quality through frequency-region-specific reference signal configurations. Regions of the frequency spectrum that are closer to uplink communications (and thus experience stronger self-interference) are allocated reference signals with higher density and different resource element patterns. This localized adaptation allows the system to maintain high spectral efficiency through full-duplex operation while mitigating self-interference effects in the most affected frequency regions.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Aspects described herein relate to receiving, over downlink resources allocated in one or more symbols used for full-duplex communications, a first set of resource blocks having a first reference signal configuration that is different in at least one of uniformity or density, in frequency, of resource elements indicated for receiving a reference signal than a second reference signal configuration. At least a first number of resource elements in the first set of resource blocks can be calculated based on the first reference signal configuration, which can facilitate determination of transport block size for decoding downlink communications. Another aspect relates to transmitting according to the first reference signal configuration and/or second reference signal configuration.