EPON Control Frame Merging for Bandwidth Efficiency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The Ethernet passive optical network (EPON) systems face inefficiencies in bandwidth usage due to overheads from burst, MPCP frame, and FEC in multi-LLID scenarios, leading to reduced network performance and increased complexity in registration processes.
Innovation Solution
The method involves optimizing MPCP control frames by allowing a single report frame to carry bandwidth requirements from multiple LLIDs and a gate frame to allocate grants to multiple LLIDs in a single frame, reducing the need for repeated frame transmissions and improving bandwidth efficiency through dynamic allocation and group management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple gate frames and report frames are sent for each LLID in multi-LLID scenarios, then each LLID can independently register and perform data service forwarding, but bandwidth efficiency is reduced due to repeated frame transmissions and overheads
Solution Approach 1:
The patent combines multiple LLID-related control information into a single gate frame and report frame. Specifically, multiple grants for different LLIDs are encapsulated in one gate frame, and multiple queue status reports for different LLIDs are encapsulated in one report frame. This merging approach reduces the number of frame transmissions and associated overheads, directly improving bandwidth efficiency while maintaining independent registration and data service capabilities for each LLID
Solution Approach 2:
The gate frame and report frame are designed to serve multiple LLIDs simultaneously rather than being dedicated to a single LLID. The gate frame can allocate grants to multiple LLIDs in one transmission, and the report frame can collect queue status information from multiple LLIDs in one transmission. This multi-functionality reduces the overhead of repeated frame transmissions and improves overall bandwidth efficiency
2Ease of operation
If multiple control frames are transmitted for each LLID to ensure independent registration and service, then proper coordination and control are achieved, but burst overheads and MPCP frame overheads increase
Solution Approach 1:
The patent merges multiple LLID control operations into single gate frames and report frames. Instead of transmitting separate control frames for each LLID, the system encapsulates multiple grants in one gate frame and multiple queue status reports in one report frame. This reduces the total number of control frames transmitted and decreases burst overheads and MPCP frame overheads while maintaining proper coordination and control capabilities
Solution Approach 2:
The patent segments the contents of gate frames and report frames to efficiently organize multiple LLID information. The gate frame is segmented to include multiple grant allocations for different LLIDs, and the report frame is segmented to include queue status information from multiple LLIDs. This segmentation allows comprehensive control information to be transmitted in a single frame structure, reducing overhead while maintaining ease of operation
Data Source
Figure 1~2
Figure 3
Figure 4
AI summary
Embodiments of the present invention disclose an Ethernet passive optical network communication method, an optical network unit, and an optical line terminal, to improve bandwidth efficiency in a multi-LLID mode in an EPON. The method in the embodiments of the present invention includes: generating, by an ONU, a first control frame, where the first control frame includes a first data field, and the first data field includes a bandwidth requirement of the at least one logical link identity LLID; and sending, by the ONU, the first control frame to an optical line terminal OLT. In addition, the OLT generates a second control frame, where the second control frame includes a second data field, and the second data field includes grant information of the at least one LLID; and the OLT sends the second control frame to the ONU. In the embodiments of the present invention, the first control frame may carry bandwidth requirements of a plurality of LLIDs, so that one first control frame can be used to report bandwidth requirements of a plurality of LLIDs. In addition, the second control frame can be used to grant a plurality of LLIDs in one ONU, so that one frame can carry more useful information, thereby saving a bandwidth and improving bandwidth efficiency.