RIS/Repeater Backhaul Channel Measurement Using TCI Feedback
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Solution Overview
Problem
There is a need for improved methods to measure and optimize backhaul channels in wireless communication systems, particularly in 5G NR, to enhance network performance and flexibility.
Innovation Solution
A method and apparatus are provided to measure and configure backhaul channels using a reconfigurable intelligent surface (RIS) or repeater, involving a network node that transmits a signal with a TCI state for a controller to obtain measurements of reference signals, and a controller that indicates measurements based on the signal, enabling dynamic optimization of RIS/repeater configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional backhaul channel measurement methods are used, then existing network configurations can be maintained, but network performance optimization and flexibility are limited
Solution Approach 1:
The patent implements dynamic measurement and configuration of backhaul channels by enabling the repeater to measure reference signals on downlink channels and report measurements to the network node. This allows dynamic adjustment of backhaul channel configurations based on real-time channel conditions, improving both network performance and flexibility through continuous optimization rather than static configurations
Solution Approach 2:
The patent establishes a feedback mechanism where the repeater measures reference signals, reports measurements to the network node, and receives configuration updates based on these measurements. This closed-loop feedback system enables continuous optimization of backhaul channel parameters, allowing the network to adapt to changing conditions and improve performance dynamically
2Adaptability or versatility
If backhaul channel measurements are performed dynamically, then network performance and flexibility are improved, but measurement and configuration complexity increases
Solution Approach 1:
The patent makes the repeater perform multiple functions: it acts as both a communication relay and a measurement device. The repeater measures reference signals on downlink channels, reports measurements to the network node, and uses these measurements for backhaul channel configuration. This multi-functionality reduces overall system complexity by consolidating measurement and communication functions in a single device
Solution Approach 2:
The patent uses reference signals as intermediaries to enable indirect measurement of backhaul channel conditions. Instead of directly measuring the backhaul channel, the system measures reference signals transmitted through the backhaul channel, which provides the necessary channel information without requiring complex direct measurement mechanisms
Data Source
AI summary
A network node may transmit a signal for a controller associated with at least one RIS/repeater, the signal including a TCI state associated with at least one backhaul channel between the network node and at least one repeater, and obtain a measurement of a reference signal of the at least one backhaul channel based on the signal including the TCI state associated with the at least one backhaul channel. The controller and the at least one RIS/repeater may indicate the measurement of reference signal of the at least one backhaul channel based on the signal including the TCI state associated with the at least one backhaul channel.