Enhanced ONU Wavelength Segmentation for Direct Peer Communication
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Solution Overview
Problem
In passive optical networks (PON), the need for ONUs to communicate with each other through an OLT occupies bandwidth for downlink signals, reducing overall bandwidth utilization.
Innovation Solution
The enhanced optical network unit (eONU) incorporates a transceiving port, receiving port, optical signal sending module, and two optical signal receiving modules with different operating wavelengths, allowing direct communication between eONUs through a star coupler without OLT intervention, thus improving bandwidth utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If ONUs communicate with each other through OLT, then communication between ONUs is achieved, but bandwidth for OLT downlink signals is occupied, causing reduced bandwidth utilization
Solution Approach 1:
The patent segments the communication function by separating OLT-ONU communication (using first wavelength) from ONU-ONU communication (using second wavelength). This wavelength segmentation allows ONUs to communicate directly without occupying OLT downlink bandwidth, resolving the bandwidth utilization issue while maintaining communication capability.
Solution Approach 2:
The patent introduces a star coupler as an intermediary device that enables direct optical signal transmission between ONUs. The star coupler acts as a passive mediator that distributes optical signals to multiple ONUs simultaneously, eliminating the need for OLT intervention in ONU-ONU communication and preserving bandwidth resources.
2Quantity of substance
If direct communication between eONUs is enabled through star coupler, then bandwidth utilization is improved, but device complexity increases due to multiple optical signal receiving modules
Solution Approach 1:
The patent implements multi-functionality by designing the enhanced ONU to handle both OLT communication (first wavelength) and peer ONU communication (second wavelength) through a unified device structure. The optical signal sending module and receiving modules are configured to serve dual purposes: receiving downlink signals from OLT and transmitting communication signals to peer ONUs, thereby reducing overall device complexity despite the added communication capability.
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
Enables efficient communication between eONUs without occupying OLT downlink bandwidth, maintaining compatibility with conventional wavelength planning and reducing signal insertion loss.
Implementation Method 1
the first optical signal receiving module has an operating wavelength being a first wavelength, while each of the optical signal sending module and the second optical signal receiving module has an operating wavelength being a second wavelength
Implementation Method 2
the star coupler enables an optical signal input to any first side interface of the plurality of first side interfaces to be transmitted to any second side interface of the plurality of second side interfaces, and enables an optical signal input to any second side interface of the plurality of second side interfaces to be transmitted to any first side interface of the plurality of first side interfaces
Data Source
AI summary
Provided in the present disclosure is an enhanced optical network unit, including a transceiving port, a receiving port, an optical signal sending module, a first optical signal receiving module, and a second optical signal receiving module. The optical signal sending module and the first optical signal receiving module are connected to the transceiving port. The second optical signal receiving module is connected to the receiving port. The first optical signal receiving module has an operating wavelength being a first wavelength, while each of the optical signal sending module and the second optical signal receiving module has an operating wavelength being a second wavelength. Further provided in the present disclosure are a passive optical network and a communication method.