Dynamic Sub-Carrier State Switching in P2MP Optical Networks
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Solution Overview
Problem
In P2MP optical networks combined with digital sub-carrier multiplexing, if a sub-carrier is assigned to multiple devices and only one device can communicate based on it, other devices experience reduced signal transmission capacity due to inactive sub-carriers, leading to inefficient use of frequency ranges.
Innovation Solution
A method where devices detect inactive sub-carriers and send requests to shift their states from inactive to active, allowing communication through these channels, thereby optimizing signal transmission capacity without affecting communication with other devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a sub-carrier is assigned to multiple devices in P2MP network, then frequency spectrum utilization is improved, but signal transmission capacity of devices that cannot communicate on that sub-carrier deteriorates
Solution Approach 1:
The patent implements dynamic sub-carrier state switching, where sub-carriers can transition between active and inactive states based on communication needs. When a device needs to communicate, previously inactive sub-carriers are activated dynamically, allowing the system to adapt resource allocation in real-time rather than maintaining fixed assignments.
Solution Approach 2:
The patent changes the operational state parameter of sub-carriers from static to dynamic. By controlling the activation state (active/inactive) of sub-carriers based on communication requests, the system optimizes both spectrum utilization and transmission capacity through parameter adjustment rather than fixed configuration.
2Reliability
If sub-carriers are kept in inactive state for devices that cannot communicate, then interference to other devices is reduced, but frequency range wastage increases
Solution Approach 1:
The patent prepares sub-carriers in an inactive state beforehand, maintaining them ready for potential use without active transmission. This preliminary preparation allows quick activation when needed while avoiding continuous energy consumption, resolving the conflict between maintaining reliability and preventing energy waste.
Solution Approach 2:
The patent extracts the communication capability from the sub-carrier assignment by separating the allocation (assignment to multiple devices) from the activation (actual transmission). This allows frequency ranges to be assigned to multiple devices without requiring simultaneous activation, eliminating waste while maintaining reliability.
3Productivity
If sub-carrier state is shifted from inactive to active, then signal transmission capacity is improved, but communication stability with other devices may be affected
Solution Approach 1:
The patent implements a feedback mechanism where devices send communication requests and the network controller responds by activating appropriate sub-carriers. This closed-loop feedback ensures that state changes are coordinated and controlled, maintaining stability while enabling capacity improvements when needed.
Solution Approach 2:
The patent introduces a network controller as an intermediary that manages sub-carrier state transitions. This mediator coordinates between multiple devices and sub-carriers, ensuring that activation of one device does not negatively impact others, thus maintaining communication stability while improving transmission capacity.
Data Source
AI summary
Embodiments of this disclosure provide a communication method and device. In the disclosure, when the first device and the second device in the Point-to-Multipoint network communicate with each other, if there is a first channel in inactive state between the two devices, which is active between the second device and the third device, and there is a second channel in inactive state between the second device and the third device, the second channel will be adopted to transmit the signal on the first channel, and then the state of the first channel will be changed to inactive state. After that, the state of the first channel between the first device and the second device will be changed to active state.