Ethernet Fine-Grained Service Frames for FlexE Bandwidth Waste
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Solution Overview
Problem
Existing FlexE technologies result in severe bandwidth waste when carrying low-rate services due to fixed rate limitations, leading to inefficient channel utilization.
Innovation Solution
A data transmission method that redefines a fine-granularity service frame structure for Ethernet interfaces, allowing flexible bandwidth allocation and sub-slot cross-connection, enabling efficient utilization of channel bandwidth even with low-rate services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If FlexE technology is used to carry services, then service isolation and network slicing are implemented, but channel bandwidth utilization deteriorates severely when low-rate services are carried
Solution Approach 1:
The patent segments the FlexE interface into multiple sub-slots, where each sub-slot can independently carry a low-rate service. This segmentation allows the interface to be divided into finer granularity units, enabling efficient bandwidth allocation for low-rate services without wasting the remaining bandwidth. The sub-slot structure enables precise matching between service rate and allocated bandwidth, resolving the contradiction between service isolation and bandwidth utilization.
Solution Approach 2:
The patent implements dynamic bandwidth allocation by allowing flexible assignment of sub-slots to different services based on actual traffic demands. The system can dynamically adjust the number and size of sub-slots allocated to each service, enabling optimal bandwidth utilization for varying service rates while maintaining service isolation. This dynamic adaptation resolves the fixed bandwidth allocation problem in traditional FlexE.
2Ease of manufacture
If conventional Ethernet interface is used, then implementation is simple, but rate is fixed and cannot adapt to low-rate services efficiently
Solution Approach 1:
The patent segments the Ethernet interface into multiple sub-slots, each capable of carrying independent services at different rates. This segmentation transforms the fixed-rate Ethernet interface into a flexible structure that can adapt to low-rate services by allocating only the necessary sub-slots, while maintaining the simplicity of Ethernet implementation through standardized encapsulation and transmission protocols.
3Loss of time
If client cross-connection technology is used, then packet forwarding delay is reduced, but bandwidth waste occurs when low-rate services are carried
Solution Approach 1:
The patent combines client cross-connection technology with sub-slot segmentation, allowing direct cross-connection at the sub-slot level. This enables low-latency forwarding for time-sensitive services while simultaneously achieving fine-grained bandwidth allocation to eliminate waste on low-rate services. The cross-connection operates on segmented sub-slots rather than entire interfaces, resolving both the delay and bandwidth waste issues.
Data Source
AI summary
This application provides a data transmission method, a communications apparatus, a network device, a communications system, a storage medium, and a computer program product, to resolve a current problem that bandwidth waste is relatively severe when a service is carried based on a FlexE technology. In this application, a frame structure of a fine-granularity service frame is newly defined, so that service data can be transmitted in a time division multiplexing mode by using an Ethernet (ETH) interface.