Aerial UE Cell Reselection via Location-Based Assistance
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Solution Overview
Problem
Current LTE and NR technologies face challenges in managing RRC connections for aerial UEs, leading to increased interference with terrestrial UEs due to the increased number of visible cells, which affects handovers and radio link failures.
Innovation Solution
The implementation of an infrastructure equipment that transmits an RRC connection release message with assistance information for cell selection/reselection based on location information, allowing aerial UEs to efficiently choose the nearest base stations and reduce interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If aerial UEs are allowed to communicate using standard LTE/NR cell selection procedures, then basic communication functionality is achieved, but interference with terrestrial UEs increases due to multiple visible cells
Solution Approach 1:
The patent applies local quality by providing different cell selection criteria for aerial UEs versus terrestrial UEs. The network device sends assistance information specifically tailored for aerial UEs, including location information and cell priority indicators that are relevant to aerial scenarios. This allows aerial UEs to select cells appropriate for their elevated position without causing interference to terrestrial UEs, while terrestrial UEs continue to use standard selection procedures.
Solution Approach 2:
The patent changes the parameters used in cell selection for aerial UEs by introducing location-based assistance information. The network device determines the aerial UE's location and provides cell priority information based on that location, altering the traditional signal-strength-only selection parameter set to include geographic context. This enables aerial UEs to make informed cell selection decisions that account for their unique operational environment.
2Ease of operation
If aerial UEs use standard handover procedures, then mobility management is maintained, but radio link failures increase due to visibility of multiple cells
Solution Approach 1:
The patent applies preliminary action by providing assistance information to aerial UEs before handover decisions are made. The network device sends location information and cell priority indicators in advance, enabling the aerial UE to pre-evaluate potential target cells for handover. This preliminary information allows the aerial UE to avoid selecting inappropriate cells that would lead to radio link failures, improving the reliability of mobility management in aerial scenarios.
3Object-generated harmful factors
If location-based assistance information is provided to aerial UEs, then interference is reduced, but network complexity increases
Solution Approach 1:
The patent applies self-service by enabling aerial UEs to autonomously determine their own location using onboard positioning capabilities (such as GPS or other positioning systems). Rather than requiring the network to provide continuous location updates, the aerial UE independently acquires location information and uses it in conjunction with the assistance information provided by the network. This reduces the processing burden on network equipment while still achieving interference reduction through location-aware cell selection.
Data Source
AI summary
An infrastructure equipment comprising circuitry configured to transmit to a user equipment an RRC connection release message including assistance information for cell selection/reselection, the assistance information being based on location information.