Aerial UE Uplink Interference Mitigation via Carrier Aggregation
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Solution Overview
Problem
Aerial user equipment (UE) generates significant uplink interference in terrestrial 4G and 5G networks due to its higher transmission power and direct line of sight, impacting nearby terrestrial UE and causing unnecessary power consumption and transmission delays.
Innovation Solution
Implementing a system that determines the number of terrestrial UE affected by aerial UE interference and initiates carrier aggregation to split uplink traffic across multiple serving cell equipment, using intra-frequency or inter-frequency carrier aggregation to reduce interference, and potentially directing aerial UE to handover to different serving cell equipment or change frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If aerial UE uses higher transmission power levels due to better line of sight, then communication reliability is improved, but uplink interference to terrestrial UE increases
Solution Approach 1:
The patent segments the uplink traffic of aerial UE across multiple component carriers (CCs) and multiple serving cell equipment. By dividing the single high-power transmission into multiple lower-power transmissions on different frequency resources, the interference to terrestrial UE is reduced while maintaining communication reliability for aerial UE.
Solution Approach 2:
The patent introduces frequency dimension through carrier aggregation, where aerial UE transmits on multiple component carriers simultaneously. This dimensional expansion allows the system to manage interference by distributing power across frequency resources rather than concentrating it on a single carrier.
2Object-generated harmful factors
If carrier aggregation is initiated to split uplink traffic across multiple serving cell equipment, then uplink interference is reduced, but device complexity increases
Solution Approach 1:
The patent implements self-service by enabling aerial UE to autonomously select and aggregate multiple component carriers from available serving cell equipment. The aerial UE itself performs the complexity of managing multiple carriers and coordinating transmissions, rather than requiring complex centralized control, thus reducing overall system complexity while achieving interference reduction.
3Area of stationary object
If aerial UE is served by distant serving cell equipment due to height advantage, then coverage area is expanded, but number of impacted neighboring serving cell equipment increases
Solution Approach 1:
The patent segments the coverage area management by assigning different component carriers to different serving cell equipment (including distant and neighboring cells). This segmentation allows the aerial UE to be served by multiple cells simultaneously without any single cell bearing the full interference burden, thus expanding coverage while limiting individual cell interference impact.
Data Source
AI summary
An architecture to reduce or eliminate uplink interference induced by aerial user equipment (UE) when aerial UE is introduced into groups of terrestrial based UE operating in terrestrial fourth generation (4G) long term evolution (LTE), fifth generation (5G) networks. A method can comprise determining a number of terrestrial based user equipment impacted by uplink interference caused by uplink transmissions associated with aerial user equipment, wherein the aerial user equipment and the terrestrial based user equipment are controlled by serving cell equipment; determining an enclosed area that bounds the number of terrestrial based user equipment; and initiating a carrier aggregation process on the aerial user equipment, wherein the carrier aggregation divides the uplink transmissions associated with the aerial user equipment over a group of serving cell equipment included in the enclosed area.