UAV RRC Control Handover for Battery-Limited Network Coverage
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Solution Overview
Problem
Current wireless communication systems, particularly those using the Terahertz band, face challenges with high path loss, heavy shadowing, and unreliable transmission due to characteristics like absorption by water-containing media and sensitivity to noise, which hinder the development of practical THz band wave systems, especially in non-terrestrial networks and Unmanned Aerial Vehicle (UAV) operations.
Innovation Solution
A method and system for managing UAV operations by establishing a radio resource control (RRC) connection using unicast communication to periodically receive and transmit UAV assistance information, allowing for the execution of control operations based on triggering events such as battery depletion or environmental factors, enabling seamless user experience and efficient UAV replacement or addition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If THz band communication is used to provide ultra-high data rates, then data transmission speed is improved, but path loss and signal reliability deteriorate due to high absorption by water-containing media
Solution Approach 1:
The patent implements dynamic beam management and adaptive communication protocols that adjust transmission parameters in real-time based on channel conditions. The system dynamically selects between different communication modes (direct THz link, relay-assisted, or fallback to lower frequencies) to maintain reliable connection despite high path loss
Solution Approach 2:
The patent introduces relay nodes and satellite intermediaries to bridge THz communication gaps. When direct THz links suffer from excessive path loss or blockage, relay satellites and ground stations act as intermediaries to forward signals, ensuring continuous reliable communication without directly compromising the high-speed THz transmission capability
2Length of stationary object
If narrow beam transmission is used to extend THz link range and suppress interference, then transmission range is improved, but system complexity increases due to precise beam alignment requirements
Solution Approach 1:
The patent implements preliminary beam training and prediction algorithms that pre-establish optimal beam directions before actual data transmission. By predicting future beam directions based on satellite orbit information and user mobility patterns, the system reduces real-time alignment complexity while maintaining extended transmission range
Solution Approach 2:
The patent employs continuous feedback mechanisms where receivers send beam quality measurements back to transmitters. This feedback enables iterative beam refinement and automatic alignment adjustment, reducing the operational complexity of maintaining precise narrow beam alignment over extended ranges
3Duration of action of stationary object
If UAV operations are extended to provide continuous coverage, then service availability is improved, but power consumption increases due to limited battery capacity
Solution Approach 1:
The patent implements periodic handover protocols where UAVs operate in coordinated cycles, providing coverage in rotating sectors. When one UAV depletes its battery, the system periodically transitions to backup UAVs or relay satellites, maintaining continuous service availability without requiring any single UAV to sustain unlimited operation
Solution Approach 2:
The patent creates a multi-functional communication system where the same infrastructure serves multiple purposes: UAVs provide both direct user service and act as mobile relays for other UAVs. This universal system allows efficient resource utilization, extending overall service duration by optimizing power consumption across the entire network rather than individual UAVs
Data Source
AI summary
The present disclosure discloses a method for managing a UAV control operation that includes: periodically receiving a request for transmission of UAV assistance information from a network entity and establishing a radio resource control (RRC) connection with the network entity. In response to the received request, the method further includes determining a triggering of at least one event corresponding to an initiation of a UAV control operation and transmitting UAV assistance information to the network entity in an RRC connected state based on the determined triggering of the at least one event. The method further includes receiving a control message from the network entity in response to the transmitted UAV assistance information. The control message includes information related to an execution of the UAV control operation. Thereafter, the method further includes executing the UAV control operation based on the information included in the received control message.