ROF Optical Fiber Coverage with Distributed Multi-Standard RRUs
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Solution Overview
Problem
Existing wireless signal coverage systems face challenges in supporting a large number of users and wide area coverage with high bandwidth while maintaining low cost, low power consumption, and addressing issues like optical insertion loss and laser interference.
Innovation Solution
An optical fiber distributed wireless signal coverage system using ROF technology, comprising a signal access intelligent unit, optical fiber splitter, and multi-standard remote radio units, which performs radio frequency conditioning, amplification, and laser signal conversion to enable efficient transmission and reception of wireless signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the signal coverage range of a single mobile network is reduced to improve user access bandwidth and support more users, then the carrier frequency and signal intensity are improved, but the system complexity and deployment cost increase
Solution Approach 1:
The system segments the wireless coverage area into multiple small cells, each served by a remote radio unit (RRU). The central unit processes signals and distributes them via optical fiber to multiple RRUs, enabling each RRU to serve a localized area with high bandwidth while the overall system supports many users across wide coverage.
Solution Approach 2:
An optical fiber network serves as an intermediary between the central signal processing unit and distributed remote radio units. This optical intermediary enables efficient signal distribution to multiple locations without direct electrical connections, reducing system complexity while supporting numerous users across extended coverage areas.
2Reliability
If optical fiber is used to distribute wireless signals to achieve high bandwidth and wide coverage, then signal transmission quality is improved, but optical insertion loss and laser interference occur
Solution Approach 1:
The system employs variable optical wavelength for signal transmission. By dynamically adjusting the wavelength parameter of the optical carrier, the system can avoid wavelengths that cause interference or high insertion loss in specific optical paths, thereby maintaining high signal transmission quality while mitigating optical insertion loss and laser interference effects.
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 provides low-cost, high-speed, and low-power wireless coverage capable of transmitting WIFI, 4G, 5G, and future 6G signals, with rapid deployment and smooth system updates, while overcoming optical insertion loss and laser interference.
Implementation Method 1
configured to averagely divide the downlink laser signal inputted through the first optical port into a plurality of downlink laser sub-signals, where the downlink laser sub-signals correspond to the second optical ports one by one and are outputted from the second optical ports; and further configured to combine the uplink laser signals inputted through the second optical ports into a resultant uplink laser signal
Implementation Method 2
convert the same into a downlink laser signal, and output the downlink laser signal to the first optical fiber interface; and further configured to convert a resultant uplink laser signal inputted from the first optical fiber interface into an uplink electrical signal
Implementation Method 3
An optical fiber distributed wireless signal coverage system based on a ROF technology, including: a signal access intelligent unit, including a radio frequency interface and a first optical fiber interface
Data Source
AI summary
Disclosed is an optical fiber distributed wireless signal coverage system based on a radio over fiber (ROF) technology, including a signal access intelligent unit, configured to perform radio frequency signal magnitude conditioning and then radio frequency amplification on a first wireless signal to obtain a first downlink electrical signal and combine the first downlink electrical signal, an OOK modulating signal, and a first radio frequency signal together and convert the same into a downlink laser signal, and output the signal to a first optical fiber interface; and further configured to convert a resultant uplink laser signal into an uplink electrical signal and perform radio frequency amplification and radio frequency signal magnitude conditioning on the uplink electrical signal to output the signal from a radio frequency interface; an optical fiber splitter, configured to divide the downlink laser signal into downlink laser sub-signals; and at least one multi-standard remote radio unit.