GPON TDM Service Data Buffering During Ranging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In Gigabit Passive Optical Networks (GPON), the ranging process for new Optical Network Units (ONUs) interrupts existing uplink TDM services to avoid data collisions, leading to service disruptions.
Innovation Solution
Implementing Input and Output Buffers in the ONU and OLT respectively, to buffer and transfer uplink TDM service data during the ranging process, ensuring continuous service by allocating additional bandwidth and managing buffer states to prevent data loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a ranging process is performed for a new ONU/ONT in a working GPON system, then the new device can be integrated into the network, but the existing uplink services of other ONU/ONTs are interrupted to avoid data collisions
Solution Approach 1:
The patent applies preliminary action by pre-buffering uplink TDM service data in buffers at both the ONU/ONT side and OLT side before the ranging process occurs. This allows the system to prepare data for transmission in advance, so that when the ranging process interrupts normal uplink transmission, the buffered data can be transmitted afterward without losing service continuity. The OLT allocates additional bandwidth specifically for transmitting this buffered data after the ranging process completes.
2Object-affected harmful factors
If existing uplink services are interrupted during ranging process, then data collisions are avoided, but service disruption occurs
Solution Approach 1:
The patent implements continuity of useful action by ensuring that uplink TDM services continue without interruption through a two-phase approach: during the ranging process, data is buffered locally at the ONU/ONT; after the ranging process completes, the OLT allocates additional bandwidth to transmit the buffered data. This ensures the useful action of data transmission continues seamlessly, eliminating service disruption time while still avoiding data collisions during the ranging process.
3Reliability
If additional bandwidth is allocated for buffering TDM service data, then data loss is prevented during ranging, but system resource consumption increases
Solution Approach 1:
The patent applies partial action by allocating additional bandwidth specifically and temporarily only for the duration needed to transmit buffered TDM service data after the ranging process. The OLT monitors the buffer status and allocates bandwidth dynamically - providing exactly the additional resources needed to prevent data loss, then canceling the additional bandwidth allocation once the buffered data is transmitted. This avoids permanently increasing resource consumption while ensuring reliability during the critical post-ranging transmission period.
Data Source
AI summary
The present invention discloses a method and system for transferring TDM services in GPON, the method includes the steps of: in the case of performing the GPON ranging process, buffering the uplink TDM service data received by an optical signal transceiver in an Input Buffer, reading out and transferring the uplink TDM service data buffered in an Output Buffer. The present invention eliminates the possible interruption of TDM services during the GPON ranging process by buffering the uplink services at the OLT and ONU/ONT side and relevant processes, and therefore realizes the TDM service transmission without any loss during the GPON system ranging process.