Remote Distributed Antenna System 60 GHz Carrier Modulation
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Solution Overview
Problem
The increasing demand for mobile bandwidth due to ubiquitous smartphones and portable devices overwhelms traditional macrocell base stations, necessitating the deployment of small cells like microcells and picocells, but this comes at a high expense and requires a pervasive and high-capacity network to support them.
Innovation Solution
A distributed antenna system that uses a microwave system to carry signals from microcells on a carrier wave in the millimeter-wave band, allowing for the modulation of RF outputs from microcell base stations onto a 60 GHz carrier wave, which is then transmitted and repeated to cover a wider area, with the ability to dynamically adjust subcarriers based on traffic requirements and frequency shift signals for efficient coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If small cell deployment is pursued to provide additional mobile bandwidth, then network capacity is improved, but infrastructure cost increases
Solution Approach 1:
The patent combines multiple microcell base stations into a single remote antenna unit that serves multiple cells from one location, reducing the number of separate infrastructure deployments needed while maintaining network capacity
Solution Approach 2:
The remote antenna unit is designed to handle multiple cellular carriers and frequency bands simultaneously, allowing a single infrastructure deployment to serve multiple network functions and providers
2Area of stationary object
If microcells and picocells are deployed to cover smaller areas, then network coverage is improved, but deployment expense increases
Solution Approach 1:
The system divides a large coverage area into multiple microcell sectors within a single remote antenna unit, allowing granular coverage control without deploying separate infrastructure for each sector
Solution Approach 2:
Multiple cellular carriers and frequency bands are nested within a single remote antenna unit deployment, allowing multiple layers of network service to share the same physical infrastructure
3Device complexity
If traditional macrocell base stations are used to provide wide coverage, then infrastructure cost is reduced, but network capacity becomes insufficient
Solution Approach 1:
The remote antenna unit provides localized high-capacity service in specific areas with concentrated user demand, while maintaining simpler macrocell infrastructure in lower-density areas, optimizing the overall network architecture
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution provides scalable and flexible network connectivity, allowing for the efficient coverage of microcells with reduced infrastructure costs by dynamically managing traffic and frequency allocation, supporting both current and future communication protocols.
Implementation Method 1
modulating RF outputs from microcell base stations onto a 60 GHz carrier wave
Implementation Method 2
A distributed antenna system that uses a microwave system to carry signals from microcells on a carrier wave in the millimeter-wave band
Data Source
AI summary
A distributed antenna system is provided that frequency shifts the output of one or more microcells to a 60 GHz or higher frequency range for transmission to a set of distributed antennas. The cellular band outputs of these microcell base station devices are used to modulate a 60 GHz (or higher) carrier wave, yielding a group of subcarriers on the 60 GHz carrier wave. This group will then be transmitted in the air via analog microwave RF unit, after which it can be repeated or radiated to the surrounding area. The repeaters amplify the signal and resend it on the air again toward the next repeater. In places where a microcell is required, the 60 GHz signal is shifted in frequency back to its original frequency (e.g., the 1.9 GHz cellular band) and radiated locally to nearby mobile devices.