Virtual Cell Identity for Aerial Interference Control

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Solution Overview

Problem

Communication devices floating in the air face significant challenges with inter-cell interference and cell confusion due to the duplication of cell identities in surrounding cells, leading to unstable signal reception and connection issues.

Innovation Solution

The introduction of virtual cells, where a communication device receives and selects a virtual cell identity from a set provided by the base station, reducing inter-cell interference and cell confusion by allowing independent radio resource control and reference signal management.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional cell identities are used in aerial vehicle communication, then cell connection can be established, but inter-cell interference and cell confusion occur due to duplication of cell identities in surrounding cells

Engineering Contradiction:
Improvecell connection stabilityVSAvoidinter-cell interference
Core Design Contradiction:
ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent divides the traditional single cell identity system into two independent identity systems: physical cell identities (PCI) for cell identification and virtual cell identities (VCI) for radio resource control. This segmentation allows the terminal to distinguish between different cells even when they share the same PCI, thereby reducing inter-cell interference and cell confusion in aerial vehicle communication scenarios.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent introduces virtual cell identities as an intermediary layer between the physical cell identity and the radio resource control functions. The VCI acts as a mediator that enables independent resource allocation and reference signal management for different cells, allowing the terminal to process signals from multiple cells with duplicate PCIs without confusion, thus improving connection stability while eliminating interference.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Reliability

If virtual cell identities are introduced for aerial vehicle communication, then inter-cell interference and cell confusion are reduced, but system information complexity increases

Engineering Contradiction:
Improveradio link qualityVSAvoidsystem information structure
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent designs the virtual cell identity system to serve multiple functions simultaneously: it provides cell identification, enables independent radio resource control, manages reference signals, and supports aerial vehicle communication requirements. By making the VCI system multi-functional, the patent reduces the need for additional separate mechanisms, thereby limiting the increase in system information complexity while achieving improved radio link quality.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent changes the parameter structure by introducing VCI as a new dimension alongside the traditional PCI. Instead of fundamentally redesigning the entire system, the patent modifies specific parameters (adding VCI to system information blocks) while keeping the existing PCI framework intact. This parameter change approach allows the system to handle aerial vehicle communication requirements without proportionally increasing overall complexity.

Inventive Principle:
Principle #35Parameter changes

Data Source

PatentUS11425640B2Communication device, base station apparatus, method, and program
Publication Date: 2022.08.23 SONY GROUP CORP
  • US11425640B2 patent drawing
  • US11425640B2 patent drawing
  • US11425640B2 patent drawing

AI summary

A communication device is provided that further improves the quality between radio links, in a communication system in which a base station apparatus communicates with a communication device.A communication device is provided that includes a reception unit that receives system information including a set of identities indicating virtual cells, and a setting unit that selects a virtual cell identity to be applied, from the set.