Sectorized Self-Interference Channel Estimation with Lower Overhead
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently estimating self-interference channels, particularly in full-duplex communication scenarios, leading to increased overhead and resource inefficiencies.
Innovation Solution
A method and device for estimating self-interference channels by transmitting downlink signals in sectors and configuring UE operations to avoid uplink transmission during estimation intervals, utilizing a base station with multiple antenna panels and processors to manage intra- and inter-sector interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If downlink signals are transmitted in all sectors for self-interference channel estimation, then estimation accuracy is improved, but overhead increases
Solution Approach 1:
The patent divides the base station's sectors into different groups (first plurality of sectors and second plurality of sectors) and transmits downlink signals only in specific sectors (first sectors) during self-interference channel estimation intervals, while other sectors (second sectors) perform uplink reception. This segmentation approach maintains sufficient estimation accuracy by focusing resources on representative sectors while reducing overall overhead compared to transmitting in all sectors.
2Reliability
If downlink signals are transmitted continuously in all sectors, then channel estimation coverage is improved, but resource utilization deteriorates
Solution Approach 1:
The patent implements periodic self-interference channel estimation by designating specific time intervals (first time intervals) for downlink signal transmission in first sectors, while other time intervals are allocated for uplink reception in second sectors. This periodic approach ensures reliable channel estimation coverage at appropriate intervals while maximizing resource utilization by avoiding continuous transmission in all sectors.
Solution Approach 2:
The patent segments both spatial resources (different sectors) and temporal resources (different time intervals) to enable parallel operations. By dividing sectors into first and second plurities and time into estimation intervals and remaining intervals, the system achieves comprehensive coverage through strategic sampling rather than continuous full-sector transmission, thereby improving resource utilization while maintaining reliability.
3Duration of action of stationary object
If uplink transmission is allowed during self-interference channel estimation intervals, then communication continuity is improved, but interference estimation accuracy deteriorates
Solution Approach 1:
The patent segments communication operations into distinct phases: during first time intervals, downlink transmission occurs in first sectors for accurate self-interference estimation while uplink is suspended in those sectors; during remaining time intervals, uplink reception occurs in second sectors. This segmentation ensures estimation accuracy during measurement phases while maintaining overall communication continuity through parallel operations in different sector groups.
Solution Approach 2:
The patent employs periodic alternation between estimation phases and communication phases. Self-interference channel estimation is performed periodically in first sectors during designated intervals, while uplink communication continues periodically in second sectors. This periodic structure ensures both accurate periodic estimation and sustained communication continuity without mutual interference.
Data Source
AI summary
The disclosure relates to a method and device for efficiently estimating a self-interference channel in a wireless communication system. A method for estimating a self-interference channel by a base station operating a plurality of sectors is provided. The method includes transmitting, in a self-interference channel estimation interval, a downlink signal in a sector among the plurality of sectors, and estimating an intra-sector self-interference channel caused by the downlink signal in the sector.