IAB Node Power Control for Interference and ADC Saturation
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Solution Overview
Problem
Integrated Access and Backhaul (IAB) nodes face power imbalance and power splitting issues, leading to inefficiencies in power control, particularly in Spatial Division Multiplexing (SDM) and Frequency Division Multiplexing (FDM) configurations, causing interference and ADC saturation.
Innovation Solution
The method involves determining the appropriate multiplexing scheme for each link pair and applying specific power control strategies, including power reservation, compensation, and scaling, with the ability to adjust transmission power based on interference levels and using PRACH offsets to avoid conflicts, allowing for hybrid configurations of TDM, FDM, and SDM.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If power control is applied in IAB nodes, then transmission power can be managed, but power imbalance and power splitting issues cause interference and ADC saturation
Solution Approach 1:
The patent segments power control into separate mechanisms for different link types (access link and backhaul link). Power control for access link and backhaul link are independently managed through separate parameter sets (e.g., different P0, pathloss compensation factors), preventing power imbalance between links and avoiding interference and ADC saturation issues.
2Productivity
If TDM, FDM, or SDM multiplexing is used, then link capacity is improved, but power control efficiency deteriorates due to power splitting between links
Solution Approach 1:
The patent applies local quality by configuring power control parameters specifically for each link type. Different power control parameters (P0, alpha, pathloss compensation factors) are assigned to access link and backhaul link based on their specific requirements, optimizing power distribution for each link while maintaining overall power control efficiency in TDM/FDM/SDM configurations.
3Adaptability or versatility
If power control parameters are configured for each link, then power distribution is optimized, but device complexity increases
Solution Approach 1:
The patent implements dynamic power control where parameters can be adjusted based on link conditions and multiplexing schemes. Power control parameters are dynamically configured according to the specific deployment scenario (TDM, FDM, or SDM), allowing the system to adapt to different conditions without requiring complex static configurations for all possible scenarios.
Data Source
AI summary
The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. Disclosed is method of performing power control for transmission signals in a telecommunication system employing Integrated Access and Backhaul, IAB, comprising the steps of: determining whether Frequency, Time or Spatial Division Multiplexing, FDM, TDM, SDM is used on a particular pair of links; and applying a power control scheme accordingly.