Passive Optical Network Bandwidth Allocation for Low-Jitter Upstream Traffic
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Solution Overview
Problem
In passive optical networks, upstream periodic services experience latency and jitter due to buffering of service data when the optical network unit lacks available bandwidth, which is unfriendly for services sensitive to these issues.
Innovation Solution
The optical line terminal detects service data characteristics such as packet length and period, and allocates a bandwidth greater than or equal to the packet length based on the service data period to facilitate immediate forwarding of upstream periodic services without delay.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the optical network unit buffers service data when upstream bandwidth is unavailable, then data transmission reliability is maintained, but latency and jitter increase for upstream periodic services
Solution Approach 1:
The system performs preliminary detection of service data characteristics (packet length, period, arrival time) at the OLT side, and pre-allocates bandwidth resources before the actual data transmission occurs. This advance preparation eliminates the need for buffering while ensuring data can be transmitted immediately when it arrives, thus reducing latency and jitter without compromising reliability.
Solution Approach 2:
The system implements a feedback mechanism where the OLT detects service data characteristics from uplink bursts, calculates appropriate bandwidth allocations based on detected patterns, and adjusts bandwidth allocation dynamically. This closed-loop feedback enables the system to adapt to periodic service patterns and allocate bandwidth proactively, preventing buffering delays while maintaining transmission reliability.
2Adaptability or versatility
If bandwidth is allocated dynamically without detecting service characteristics, then bandwidth utilization flexibility is improved, but service data forwarding delay increases
Solution Approach 1:
The system detects service data characteristics (packet length, period, arrival time) in advance and uses this information to pre-calculate and allocate bandwidth before data arrives. This preliminary action enables the OLT to have bandwidth ready when periodic service data arrives, eliminating forwarding delays while preserving the flexibility of dynamic allocation based on actual service patterns.
Solution Approach 2:
The system dynamically adjusts bandwidth allocation based on detected service characteristics, transitioning from static to adaptive bandwidth management. By detecting periodic patterns and calculating optimal allocation parameters dynamically, the system achieves both flexibility in resource management and low latency in data forwarding, resolving the contradiction between adaptability and speed.
Data Source
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AI summary
The present application discloses a bandwidth allocation method, apparatus, communication device, and storage medium, and belongs to the technical field of optical network communication. The bandwidth allocation method is applied to an optical line terminal in a passive optical network, and includes: detecting service data characteristics of an upstream periodic service in the passive optical network; wherein the service data characteristics includes at least a service data packet length and a service data period; and allocating a first bandwidth with a length not less than the service data packet length to an optical network unit in the passive optical network according to the service data period, to allow the optical network unit forward service data of the upstream periodic service via the first bandwidth.