Full-Duplex Self-Interference Channel Estimation with Muted Uplink Resources
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Solution Overview
Problem
Existing full-duplex communication systems face challenges in efficiently estimating self-interference channels, which hampers the optimization of system networks and frequency efficiency, particularly in advanced wireless communication systems like 5G and 6G.
Innovation Solution
A method and device for estimating a self-interference channel in a full-duplex communication system by transmitting information about muted uplink resources and adjusting uplink reception periods to estimate the self-interference channel during downlink transmission, utilizing a base station and user equipment with transceivers and processors to manage these resources effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If uplink reception is performed simultaneously with downlink transmission in full-duplex mode, then frequency efficiency is improved, but self-interference channel estimation accuracy deteriorates
Solution Approach 1:
The patent segments the uplink reception resources by designating specific resource elements as muted resources. This segmentation allows the system to maintain full-duplex operation on most resources while creating isolated intervals for accurate self-interference channel estimation, thereby resolving the contradiction between maintaining high frequency efficiency and achieving accurate channel estimation.
2Measurement precision
If muting resources are introduced for self-interference channel estimation, then estimation accuracy is improved, but system resource utilization deteriorates
Solution Approach 1:
The patent applies local quality by muting only specific resource elements rather than entire uplink slots. This localized muting approach ensures that self-interference channel estimation can be performed accurately on designated resources while the majority of uplink resources remain active for data transmission, thus balancing estimation accuracy with resource utilization efficiency.
3Reliability
If information about muted uplink resources is transmitted to UE, then channel estimation coordination is improved, but signaling overhead increases
Solution Approach 1:
The patent implements preliminary action by pre-configuring and notifying UEs about muted uplink resources before actual full-duplex transmission begins. This advance notification allows UEs to prepare their transmission schedules accordingly, ensuring reliable channel estimation coordination while minimizing signaling overhead by establishing the muting pattern upfront rather than continuously signaling during operation.
Data Source
AI summary
The disclosure relates to a method and device for efficiently estimating a self-interference channel in an FD communication system. A method for estimating a self-interference channel by a BS in an FD communication system includes transmitting, to a first UE, information about an uplink resource where uplink reception from the first UE is muted; and estimating a self-interference channel related to downlink transmission in a period corresponding to the uplink resource where uplink reception is muted during downlink transmission to a second UE, based on the transmitted information.