Optical Subcarrier Parameter Modification for Network Capacity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing optical communication systems require multiple transmitters to generate optical signals with specific modulation formats, data rates, and power levels, leading to increased costs and complexity, especially as network capacity demands rise.
Innovation Solution
The system allows for the independent routing and customization of optical subcarriers within an optical communication network, enabling each subcarrier to be tailored with specific optical power levels, modulation formats, data rates, and baud rates based on the intended receiver and transmission path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple transmitters are provided to supply additional optical signals to satisfy network capacity requirements, then the network capacity is improved, but the system cost increases significantly
Solution Approach 1:
A single optical transmitter is designed to generate multiple optical signals with different modulation formats, data rates, and power levels by dynamically configuring subcarrier parameters. The transmitter can serve multiple network functions and accommodate different service requirements using one device, thereby reducing the need for multiple dedicated transmitters and lowering system cost while maintaining high network capacity
Solution Approach 2:
The optical transmitter employs dynamic parameter adjustment capabilities, allowing it to change modulation formats, data rates, and power levels of subcarriers in real-time based on network conditions and service requirements. This dynamic adaptability enables a single transmitter to replace multiple fixed-function transmitters, improving productivity without proportionally increasing device complexity
2Reliability
If each transmitter is customized to generate optical signals with specific modulation formats, data rates, and power levels, then the signal performance is improved, but the device complexity increases
Solution Approach 1:
Different subcarriers within the optical signal are assigned different modulation formats, data rates, and power levels according to their specific routing requirements and destination characteristics. Each subcarrier is optimized locally for its intended path and receiver capabilities, achieving high signal performance without requiring complete transmitter customization for each possible signal type
Solution Approach 2:
The transmitter modifies parameters such as modulation format, data rate, and power level dynamically based on feedback information about the transmission path and receiver characteristics. This parameter adaptation allows the system to achieve optimized signal performance for each specific communication scenario without maintaining multiple fixed-configured transmitters, thereby managing device complexity
3Adaptability or versatility
If optical signals are transmitted through varying numbers of OADMs and over different distances, then the network flexibility is improved, but the power requirements vary making it difficult to satisfy destination requirements
Solution Approach 1:
The system employs feedback mechanisms where information about the transmission path characteristics, including the number of OADMs and transmission distance, is communicated back to the transmitter. Based on this feedback, the transmitter adjusts the power levels of individual subcarriers to compensate for path losses and ensure adequate signal quality at the destination, thereby managing power control complexity while maintaining network flexibility
Solution Approach 2:
The transmitter pre-configures subcarrier power levels based on anticipated path characteristics and receiver requirements before transmission begins. By calculating and setting appropriate power levels in advance considering the number of OADMs and transmission distance, the system ensures that power requirements are met without requiring complex real-time power adjustment mechanisms
Data Source
AI summary
Optical network systems are disclosed, including systems having transmitters with a digital signal processor comprising forward error correction circuitry that provides encoded first electrical signals based on input data; and power adjusting circuitry that receives second electrical signals indicative of the first electrical signals, the power adjusting circuitry supplying third electrical signals, wherein each of the third electrical signals is indicative of an optical power level of a corresponding to one of a plurality of optical subcarriers output from an optical transmitter.