Optical Relay Switching for Multi-Rate Long-Distance MFH Links
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing optical communication systems in mobile communication networks face challenges in coping with multiple data rates, including 25GE, 9.8304 Gbps, and various CPRI rates, and extending MFH beyond 20 km using dark fibers, while addressing wavelength dispersion and signal degradation.
Innovation Solution
A relay system with a transmission device and reception device that includes full-rate and low-rate signal processing units, optical transmitters, and switching units to convert and multiplex signals, supporting multiple data rates and extending communication distances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If dark fibers are used to extend MFH distance, then communication distance is improved, but signal degradation due to wavelength dispersion worsens
Solution Approach 1:
The high-speed signal is segmented into multiple low-speed channels for transmission. By dividing the original high-rate signal into several lower-rate sub-signals, each sub-signal experiences reduced wavelength dispersion effects during transmission, thereby maintaining signal quality over extended distances while still achieving the desired communication range
Solution Approach 2:
The system changes the transmission parameter by converting a single high-speed signal into multiple low-speed signals. This parameter transformation allows the signal to traverse longer distances through dark fibers by operating in a regime where wavelength dispersion has minimal impact, thus resolving the contradiction between distance extension and signal degradation
2Adaptability or versatility
If multiple data rates are supported, then system versatility is improved, but device complexity worsens
Solution Approach 1:
The relay device is designed with multi-functional capabilities to handle multiple data rates (25GE, 9.8304 Gbps, and various CPRI rates) through a unified architecture. By incorporating universal signal processing units that can adaptively process different rate signals, the system achieves broad compatibility without proportionally increasing complexity, as the same hardware infrastructure serves multiple communication standards
Solution Approach 2:
The system employs dynamic signal processing where the relay device can adaptively adjust its operation mode based on the input signal characteristics. This dynamic capability allows the device to optimize its processing path for each specific data rate, managing complexity by only activating the necessary processing functions for the current transmission requirement rather than maintaining all processing paths simultaneously
3Speed
If high-speed signals are transmitted, then transmission speed is improved, but signal degradation due to wavelength dispersion worsens
Solution Approach 1:
The high-speed signal is divided into multiple low-speed channels for transmission. Each low-speed channel experiences reduced wavelength dispersion effects, allowing the original high-speed data to be transmitted over longer distances with maintained signal quality. The segmentation transforms the high-speed transmission problem into multiple manageable low-speed transmission tasks
Solution Approach 2:
The patent introduces low-speed signal channels as intermediary carriers to transmit the original high-speed data. By encoding high-speed information into multiple low-speed streams for transmission and then reconstructing at the receiving end, the system uses these intermediary low-speed channels to bridge the gap between high-speed data requirements and low-dispersion transmission needs
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 effectively handles multiple data rates, reduces signal degradation, and extends communication range beyond 20 km, ensuring efficient signal transmission and reception across diverse mobile communication networks.
Implementation Method 1
a first optical transmitter configured to convert the first signal to a first optical signal
Implementation Method 2
a first optical receiver configured to convert the first optical signal generated by the demultiplexer to the first signal
Data Source
AI summary
A relay system includes a transmission device and a reception device. The transmission device includes: a first optical transmitter that converts a first signal to a first optical signal having a transmission speed equal to that of the first signal, and transmits the first optical signal; a data separator that converts the first signal to a plurality of low-rate signals having a lower speed than the first signal; a plurality of second optical transmitters each capable of converting the low-rate signals to low-rate optical signals and transmitting the optical signals, and converting a second signal to a second optical signal having a transmission speed equal to that of the second signal and transmitting the optical signal; and a multiplexer that multiplexes a plurality of optical signals selected from among the first optical signal, the low-rate optical signals, and the second optical signal, and outputs a multiplexed optical signal.