Remote Frequency Conversion for 5G Indoor Coverage Expansion
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Solution Overview
Problem
Existing indoor distribution systems face challenges in upgrading and expanding 5G hardware capacity due to limitations in power amplifiers and output power, leading to insufficient coverage in 5G networks.
Innovation Solution
A remote device with non-frequency-conversion and frequency conversion processing units, capable of handling 5G signals and other standards like 2G, 3G, and 4G signals, is integrated into a 5G distributed system, allowing for seamless signal transmission and coverage expansion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If traditional 4G networking method is used, then indoor coverage is provided, but 5G bandwidth requirements cannot be met
Solution Approach 1:
The system divides signal processing into separate frequency conversion processing units and non-frequency conversion processing units. The frequency conversion processing unit handles 5G signals by converting them to lower frequencies, while the non-frequency conversion processing unit directly processes 2G/3G/4G signals without frequency conversion. This segmentation allows the system to simultaneously support 5G bandwidth requirements and legacy network compatibility.
Solution Approach 2:
The patent introduces an intermediary frequency conversion processing unit that acts as a bridge between high-frequency 5G signals and the transmission system. This intermediary converts 5G signals to lower frequencies suitable for indoor distribution, enabling 5G bandwidth requirements to be met while maintaining compatibility with existing infrastructure designed for lower frequencies.
2Area of stationary object
If high-power signal sources are used in indoor distribution system, then coverage is improved, but cost increases due to power amplifier limitations
Solution Approach 1:
The system changes the frequency parameter of 5G signals through frequency conversion, transforming high-frequency signals into lower frequencies that can be efficiently amplified by existing power amplifiers. This parameter change allows the system to achieve adequate coverage area without requiring expensive high-power amplifiers, thereby reducing upgrade costs while maintaining coverage requirements.
3Power
If remote coverage unit output power is limited, then system simplicity is maintained, but coverage requirements cannot be met
Solution Approach 1:
The system performs preliminary frequency conversion on 5G signals before they reach the remote coverage unit. By converting 5G signals to lower frequencies in advance, the system enables the remote coverage unit to operate at lower power levels while still achieving adequate coverage area, as the frequency-converted signals can be more efficiently transmitted and distributed through the existing infrastructure.
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
The system supports 5G network upgrades and meets coverage requirements by converting 5G signals and transmitting other standard signals without frequency conversion, enhancing transmission bandwidth and extending coverage.
Implementation Method 1
the frequency conversion processing unit is configured to perform frequency conversion processing or restoration frequency conversion processing on a first signal
Data Source
AI summary
A 5G distributed system includes a near-end unit, a remote device, and an active antenna unit. The near-end unit transmits signals of multiple modes including 5G signal to the remote device. The remote device performs frequency conversion processing on 5G signal and does not perform frequency conversion processing on signals of other modes, such as 4G, and then outputs to the active antenna unit for coverage. In the present disclosure, the 5G signal is converted by frequency conversion at the remote device, and signals of other modes other than 5G signal are transmitted to the remote active antenna unit without being processed by frequency conversion for signal coverage, which satisfies the coverage requirements of 5G indoor distribution.