Network-Controlled Repeater Interference Coordination Across 5G Links
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Solution Overview
Problem
There is a need for improved communication and control methods between network controlled repeaters (NCR) and base stations (gNB) to enhance integration and manage interference, power, frequency, and beamforming in 3GPP wireless communication systems, particularly in 5G networks.
Innovation Solution
A method for network controlled repeaters (NCR) that includes transmitting capability information to an access network node for dealing with interference among control, backhaul, and access links, and receiving control information to manage interference based on this capability, with options for power, gain, frequency, and beamforming control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the repeater simply amplifies and forwards signals from the base station, then the coverage area is extended cost-effectively, but interference management between control link, backhaul link, and access link becomes difficult
Solution Approach 1:
The patent segments the repeater's functionality into separate control link and backhaul link, with dedicated time slots and frequency resources for each. The control link handles signaling between base station and repeater, while the backhaul link handles data transmission, preventing interference between these functions through temporal and spectral separation.
Solution Approach 2:
The patent implements dynamic resource allocation where the base station can flexibly assign time slots, frequency bands, and power levels to different links based on current network conditions. This dynamic control allows the system to adapt to changing interference conditions while maintaining coverage extension.
2Measurement precision
If the repeater receives control information from the base station for beamformed transmissions, then the transmission precision is improved, but the device complexity increases
Solution Approach 1:
The repeater autonomously configures its own beamforming parameters based on control information received from the base station. Rather than requiring complex centralized control, the repeater self-adjusts its transmission characteristics using the provided guidance, reducing overall system complexity while maintaining precision.
Solution Approach 2:
The patent uses parameter-based control where the base station provides control information specifying beam direction, width, and other transmission parameters. The repeater then changes its operational parameters to match these specifications, achieving precise beamformed transmissions through parameter adjustment rather than complex hardware reconfiguration.
3Object-affected harmful factors
If the repeater manages power and frequency for multiple links, then the interference is reduced, but the loss of time for coordination increases
Solution Approach 1:
The base station performs preliminary configuration by pre-allocating time slots, frequency bands, and power levels for different links before actual data transmission begins. This advance planning eliminates the need for real-time coordination adjustments, reducing interference while minimizing time loss.
Solution Approach 2:
The patent implements periodic resource allocation patterns where time and frequency resources are divided into repeating cycles. This periodic structure allows efficient coordination through simple cyclic scheduling rather than continuous real-time negotiation, reducing both interference and coordination overhead.
Data Source
AI summary
A method for a network controlled repeater (NCR) is disclosed. The NCR has a control link and a backhaul link, to an access network node, and an access link to a user equipment, UE. Transmission via the control link is terminated at the NCR and transmission via the backhaul link is forwarded via the NCR to the access link. The method includes: transmitting, to the access network node, capability information indicating capability for dealing with interference among transmission of the control link, the backhaul link, and the access link; and receiving, from the access network node via the control link, control information for controlling the NCR to deal with the interference based on the capability information.