NCR Beam Feedback for Control-Link Interference Reduction
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Solution Overview
Problem
The downlink reception performance in the control link of a network-controlled repeater (NCR-MT) is degraded due to interference from the downlink transmission beam of the access link.
Innovation Solution
The NCR-MT performs measurements and transmits feedback information to the base station, including interference information for the downlink reception and transmission beams, allowing the network to adjust beam directions to minimize interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the NCR-Fwd transmits downlink signals through the access link, then the signal coverage and communication capacity are improved, but the downlink reception performance in the control link of NCR-MT is degraded due to interference
Solution Approach 1:
The patent segments the beam management into two independent parts: the NCR-Fwd independently selects downlink transmission beams for access link signal coverage, while the NCR-MT independently selects downlink reception beams for control link reception. This segmentation allows each component to optimize its function without causing interference to the other, resolving the contradiction between coverage expansion and reception performance.
Solution Approach 2:
The patent implements a feedback mechanism where the NCR-MT measures interference from access link transmission beams and reports this information to the network. Based on this feedback, the network can adjust beam directions or transmission parameters to minimize interference while maintaining coverage, thus resolving the performance degradation issue.
2Productivity
If the NCR-Fwd transmits downlink signals through the access link, then the communication capacity is improved, but the downlink reception performance in the control link of NCR-MT is degraded
Solution Approach 1:
The patent separates the beam selection functions: NCR-Fwd selects transmission beams for high-capacity access link communication, while NCR-MT selects reception beams optimized for control link reliability. This functional segmentation enables both high communication capacity and reliable downlink reception to coexist.
Solution Approach 2:
The patent changes the parameter of beam direction selection by introducing independent beam selection for NCR-MT based on interference measurements. By adjusting beam directions as variable parameters rather than fixed configurations, the system can optimize for both communication capacity and reception performance simultaneously.
3Ease of operation
If the NCR-MT receives control information through the control link, then the network control functionality is maintained, but the reception is interfered with by the downlink transmission beam of the access link
Solution Approach 1:
The patent employs feedback where NCR-MT measures the interference level from access link transmission beams and reports this information to the network. The network uses this feedback to adjust transmission parameters or beam directions, thereby reducing interference and maintaining reliable control link functionality.
Solution Approach 2:
The patent introduces an intermediary measurement and reporting mechanism between the NCR-MT and the network. This intermediary feedback channel allows the system to detect and compensate for interference effects, protecting the control link functionality without requiring changes to the access link transmission.
Data Source
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AI summary
An operation method of a device in a wireless communication system and a device using the method are provided. The method may be performed by an NCR including NCR-MT and NCR-Fwd. The NCR-MT performs measurement, and the NCR-MT transmits feedback information based on a result of the measurement to a base station. The feedback information includes interference information on a pair of a downlink reception beam in a control link through which the NCR-MT receives control information from the base station and a downlink transmission beam in an access link through which the NCR-Fwd transmits a signal to a terminal.