PON Uplink Scheduling via Higher-Network Apparatus
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Solution Overview
Problem
Existing PON systems face challenges in transferring uplink data at high speeds while meeting severe delay time requirements between higher-network and lower-network apparatuses, particularly in remote radio head systems, due to limitations in bandwidth allocation and processing delays.
Innovation Solution
The higher-network apparatus performs uplink bandwidth control based on scheduling, calculating and notifying the optical line terminal of transmission times and permission amounts for uplink data, rather than relying on the optical line terminal to perform bandwidth control after data arrival from the lower-network apparatus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the optical line terminal performs bandwidth control based on data arrival from lower-network apparatus, then the system can allocate bandwidth dynamically, but the processing delay increases and high-speed data transfer cannot be achieved
Solution Approach 1:
The higher-network apparatus performs scheduling and calculates transmission parameters in advance before the uplink data actually arrives at the optical line terminal. By pre-calculating the transmission time and permission amount based on scheduled information, the system eliminates waiting and processing delays at the OLT, thereby achieving high-speed data transfer while maintaining dynamic bandwidth allocation
2Reliability
If the optical line terminal performs bandwidth control after data arrival, then the system can adapt to actual data needs, but the delay time requirement between higher-network and lower-network apparatus cannot be met
Solution Approach 1:
The system performs preliminary scheduling and parameter calculation at the higher-network apparatus before data arrival. This advance preparation ensures that when data arrives at the optical line terminal, the transmission parameters are already determined, thus meeting the stringent delay time requirements while maintaining efficient bandwidth allocation through the pre-established scheduling mechanism
Data Source
AI summary
A communication system and method comprising a higher-network apparatus and a lower-network apparatus connected through a PON system, which transfers uplink data from the lower-network apparatus to the higher-network apparatus at high speed so as to meet severe conditions required for a delay time between the higher-network apparatus and the lower-network apparatus. The method including a scheduling execution process in which a higher-network apparatus performs scheduling for uplink communication from each of the lower-network apparatus to the device itself and an uplink data transmission permission process in which the higher-network apparatus calculates a transmission time and a transmission permission amount of uplink data transmitted from an ONU to OLT based on the scheduling for uplink communication and notifies the OLT.