PON User Terminal Power Saving State Management
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Solution Overview
Problem
Passive optical network user terminals consume excessive energy when services requiring low power are active for extended periods, as existing systems lack the ability to adjust energy consumption dynamically.
Innovation Solution
A method for operating passive optical network user terminals that allows them to automatically adjust energy consumption by entering a saving state based on traffic thresholds or service activity, with the terminal requesting permission from the optical line terminal and controlling internal modules to switch between saving and normal states intermittently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the user terminal operates continuously to maintain service availability, then service reliability is improved, but energy consumption increases
Solution Approach 1:
The user terminal dynamically adjusts its operating state between normal mode and saving mode based on traffic conditions. The system monitors service traffic and automatically transitions between states, making the terminal's energy consumption flexible rather than fixed. This resolves the contradiction by allowing continuous service availability when needed while reducing energy consumption during low-traffic periods.
Solution Approach 2:
The patent changes the operational parameters of the user terminal by introducing a saving mode with reduced power consumption. The terminal modifies its working parameters (power consumption level) based on traffic thresholds, transitioning from full operation to low-power operation. This parameter change enables the system to maintain service reliability while significantly reducing energy consumption during appropriate periods.
2Use of energy by moving object
If the user terminal enters saving state to reduce power consumption, then energy consumption is reduced, but service response time may increase
Solution Approach 1:
The user terminal operates periodically by alternating between saving state and normal state based on traffic conditions. The system uses periodic monitoring of traffic thresholds to determine when to transition between states. This periodic action ensures that the terminal responds to service needs timely while maintaining energy savings during low-traffic periods, balancing response time requirements with energy consumption reduction.
3Productivity
If the optical line terminal continuously monitors traffic to enable dynamic bandwidth allocation, then bandwidth utilization is improved, but system complexity increases
Solution Approach 1:
The optical line terminal implements a feedback mechanism that monitors service traffic and uses this information to dynamically adjust bandwidth allocation. The system continuously collects traffic information and feeds it back to the bandwidth allocation algorithm, which then adjusts the time window authorization accordingly. This feedback loop enables improved bandwidth utilization while keeping the control logic relatively simple and manageable.
Data Source
AI summary
A method for operating PON (passive optical network) user terminal and a PON user terminal equipment, when there is only few data service request in the PON, the PON user terminal operates in power saving manner which maintains low speed connection, the method comprises: a judgment condition that the PON user terminal changes to power saving state is set; the PON user terminal determines whether its own state meet the judgment condition changing to power saving state, if so, it transmits a request to change to power saving state to the OLT (optical line terminal); after the PON user terminal receives the respond that the OLT has accepted the request, it controls parts of the modules therein to change to power saving state, and intermittently switch over between power saving state and normal state. The invention allows saving power under the condition that keeps the low speed service uninterrupted, in the meanwhile alleviates the pressure of ONU terminal thermal design.