UAV Network Camp-On Control Using Height-Based Access Rules
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Solution Overview
Problem
Existing wireless communication systems face challenges in effectively managing the integration and control of uncrewed aerial vehicles (UAVs) due to their unique line-of-sight characteristics, leading to increased interference and inefficient access and backhaul node management.
Innovation Solution
Implementing a method and device that allow UAVs in RRC_IDLE or RRC_INACTIVE states to receive system information indicating connection availability and perform camp-on procedures based on height thresholds and frequency reselection rules, using new system information blocks (SIBs) to manage interference and access restrictions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If UAVs are integrated into wireless communication systems, then new services and coverage are enabled, but interference increases and access management becomes inefficient
Solution Approach 1:
The patent segments UAV access management by introducing separate system information blocks (SIBs) for different UAV categories. Category A UAVs (lower altitude, lower power) and Category B UAVs (higher altitude, higher power) are managed with different parameters including power spectral density limits, maximum transmit power, and access restrictions. This segmentation enables differentiated interference management while supporting diverse UAV services.
Solution Approach 2:
The patent applies local quality by configuring cell-specific UAV access parameters including height thresholds, power spectral density limits, and maximum transmit power values that are tailored to specific cell conditions. Base stations can set different parameters for different cells based on local interference conditions, terrain, and network capacity, enabling localized optimization of UAV access and interference control.
2Adaptability or versatility
If UAVs in RRC_IDLE or RRC_INACTIVE states are allowed to access the network, then service coverage is improved, but access control and interference management become more complex
Solution Approach 1:
The patent implements preliminary action by configuring UAV access parameters in advance through system information broadcasting before UAVs attempt access. Base stations pre-configure and broadcast SIBs containing category-specific parameters (power spectral density, maximum power, height thresholds) so that UAVs can self-evaluate and self-regulate their access attempts without real-time network intervention, simplifying access control while enabling comprehensive service coverage.
Solution Approach 2:
The patent enables self-service by allowing UAVs to autonomously determine their category (A or B) based on their operational characteristics and self-regulate their transmit power and access behavior according to the parameters received in system information. UAVs independently perform camp-on procedures, cell reselection, and power control without requiring complex real-time network management, reducing access control complexity while maintaining service coverage.
3Object-generated harmful factors
If height thresholds and frequency reselection rules are implemented, then interference is reduced, but device complexity increases
Solution Approach 1:
The patent applies parameter changes by introducing height threshold parameters and frequency reselection rules that dynamically adjust UAV access behavior. UAVs modify their transmit power, frequency selection, and cell reselection decisions based on their height relative to configured thresholds and on the reselection rules received in system information. These parameter-based controls reduce interference through physics-based separation (height) and frequency domain management while maintaining relatively simple device implementation through straightforward parameter comparison and selection logic.
Data Source
AI summary
The present disclosure relates to a 5G or 6G communication system for supporting higher data transmission rates. According to various embodiments disclosed herein, a method performed by an uncrewed aerial vehicle (UAV) terminal in a radio resource control (RRC)_IDLE or RRC_INACTIVE state may be provided. The method may include the steps of: receiving a message including system information from a base station, wherein the system information includes first information indicating whether it is possible to connect the UAV terminal; and performing camp-on on the base station on the basis of the first information in response to the message including the received system information.