IAB Node Power Control for Simultaneous Transmission and Reception
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Solution Overview
Problem
In integrated access and backhaul (IAB) environments, IAB nodes face challenges in simultaneously performing data transmission and reception without causing interference, especially when operating in a non-time division multiplexing (TDM) scheme.
Innovation Solution
The method involves measuring power differences between signals received from parent and child nodes, controlling transmit powers based on these measurements, generating scheduling information for simultaneous transmission, and aligning uplink reception timings with uplink transmission timings using timing advance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If an IAB node performs data transmission and reception simultaneously with a parent node and a child node in a non-TDM scheme, then the transmission efficiency is improved, but interference occurs between the signals
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting transmit power levels based on measured power differences between signals. The IAB node modifies power parameters to manage interference while enabling simultaneous transmission and reception operations, resolving the contradiction between transmission efficiency and interference reduction.
2Ease of operation
If power difference between signals is not controlled, then the system operation is simplified, but signal quality deteriorates due to power imbalance
Solution Approach 1:
The patent implements feedback mechanisms where the IAB node measures power differences between received signals and uses this information to control transmit power. This closed-loop feedback system automatically adjusts power levels to maintain signal quality while managing system complexity through automated control.
Data Source
AI summary
An operation method of an IAB node in a communication system may comprise: measuring a power difference between a first signal received from a first node and a second signal received from a second node; controlling a transmit power of each of the first node and the second node based on the power difference; generating scheduling information for allowing the first node and the second node to simultaneously transmit signals; transmitting the scheduling information to the first node and the second node; and receiving signals that the first node and the second node simultaneously transmit according to the scheduling information by using the transmit power.