UAV Random Access Identification for Neighbor Cell Interference Control
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Solution Overview
Problem
UAVs experience interference with neighboring cellular networks due to their height, which affects access and service provision, and existing methods fail to effectively manage this interference during the random access phase.
Innovation Solution
A method and device for UAV access that involve sending a random access request with a Random Access Preamble (RAP), followed by a random access initial response, and including terminal indication information such as a UAV type identifier or device number to allow or deny access based on interference thresholds, ensuring efficient and reliable access while minimizing interference to neighboring cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If UAVs are allowed to access the cellular network freely, then service coverage and application range are expanded, but interference to neighboring cells increases
Solution Approach 1:
The patent applies preliminary action by introducing terminal indication information in the first message during the random access phase. This allows the base station to identify UAV terminals before full service establishment, enabling proactive interference management decisions to be made in advance, thus preventing interference issues rather than addressing them after they occur.
Solution Approach 2:
The patent implements feedback by establishing a closed-loop control mechanism where the base station receives terminal indication information, evaluates interference conditions, and sends access permission or rejection messages back to UAV terminals. This feedback loop enables dynamic adjustment of access decisions based on real-time interference levels, resolving the contradiction between service coverage and interference control.
2Object-affected harmful factors
If interference control measures are implemented during random access, then interference to neighboring cells is reduced, but access complexity increases
Solution Approach 1:
The patent reduces access control complexity by performing preliminary identification of UAV terminals during the random access phase using terminal indication information. This early identification allows interference assessment to be conducted before full service establishment, simplifying subsequent control decisions and avoiding the need for complex real-time interference management during active service.
Solution Approach 2:
The patent applies local quality by implementing interference control specifically targeted at UAV terminals rather than applying uniform control to all terminals. The base station processes terminal indication information to identify UAVs and applies interference-based access control selectively to these terminals, leaving ordinary terminal access procedures unchanged, thus minimizing overall system complexity.
3Measurement precision
If terminal indication information is required for UAV identification, then access control precision is improved, but signaling overhead increases
Solution Approach 1:
The patent reduces signaling overhead by making terminal indication information multi-functional. The same information element serves both as a terminal identifier in the random access phase and as UAV-specific identification for interference control. This universal usage of the indication information eliminates the need for separate identification mechanisms, balancing identification precision with signaling efficiency.
Data Source
AI summary
An unmanned aerial vehicle access method being used for a base station includes: receiving a random access request sent by an unmanned aerial vehicle, the random access request including a random access preamble; when it is determined to respond to the random access request of the unmanned aerial vehicle, sending a random access initial response to the unmanned aerial vehicle; receiving a first message sent by the unmanned aerial vehicle, the first message including terminal indication information, the terminal indication information being used for indicating that a terminal, which requests to access, is the unmanned aerial vehicle; and when it is determined to allow the access of the unmanned aerial vehicle, sending, to the unmanned aerial vehicle, a second message for indicating that access is allowed.