TDD Repeater Dynamic Direction Detection for 5G Interference
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Solution Overview
Problem
Conventional TDD repeaters struggle to determine the uplink (UL)/downlink (DL) direction accurately in 5G systems, leading to errors and severe DL-UL cross-link interference due to dynamic changes in UL/DL traffic patterns.
Innovation Solution
A method and apparatus for a repeater to determine the UL/DL direction by monitoring signals in a time interval without predetermined direction, using slot format information, and based on signal strength, quality, and other parameters to correctly retransmit signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If conventional TDD repeaters use static DL-UL pattern determination, then device complexity is reduced, but adaptability to dynamic UL/DL traffic changes deteriorates
Solution Approach 1:
The repeater transitions from static pattern determination to dynamic determination by monitoring signal directions in real-time. The repeater dynamically adjusts its DL-UL pattern based on detected signal directions during flexible periods, enabling adaptation to changing traffic conditions while maintaining operational simplicity through automated signal-based detection.
2Ease of operation
If conventional repeaters fail to determine transmission direction accurately, then ease of operation is maintained, but harmful interference increases
Solution Approach 1:
The repeater implements a feedback mechanism by monitoring signal directions during flexible periods and using this information to determine the correct transmission direction. The repeater detects reference signals from base stations or terminals, feeds back this directional information to its control unit, and adjusts its transmission direction accordingly, thereby eliminating cross-link interference while maintaining operational simplicity.
3Measurement precision
If repeaters monitor signals in undetermined time intervals, then transmission direction accuracy is improved, but use of energy increases
Solution Approach 1:
The repeater performs signal monitoring periodically during flexible periods rather than continuously. By scheduling monitoring actions at specific intervals when direction determination is needed, the repeater achieves accurate transmission direction determination while minimizing energy consumption through targeted, periodic measurements instead of continuous monitoring.
Data Source
AI summary
An operation method of a repeater performing relaying between a base station and a first terminal in a communication system may comprise: receiving one or more signals from at least one of the base station and the first terminal; performing monitoring on the one or more signals in a time interval for which a transmission direction is not determined by the base station; and determining the transmission direction of the time interval based on a result of the monitoring, wherein the one or more signals include at least one of a first signal received from the base station or a second signal received from the first terminal.