Non-Decapsulation Service Data Transmission Across PON and OTN
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Solution Overview
Problem
The existing communication systems face challenges in directly connecting passive optical networks (PON) and optical transport networks (OTN), leading to increased transmission latency and network construction costs due to the need for switching devices.
Innovation Solution
A method that encapsulates service data in a non-decapsulation manner using a convergence device, forming intermediate frames to match the byte quantity of XGEM frames, thereby reducing latency and eliminating the need for switching devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If switching devices are used to connect PON and OTN networks, then interconnection between networks is achieved, but transmission latency increases and network construction costs increase
Solution Approach 1:
The patent extracts and removes the switching device from the network architecture by implementing direct physical layer interconnection between PON and OTN networks. The OLT is directly connected to the OTN network without intermediate switching equipment, eliminating the need for frame processing and forwarding operations that cause latency.
Solution Approach 2:
The patent embeds the PON network directly within the OTN network infrastructure by establishing direct physical layer connectivity. The OLT's optical signals are directly mapped onto OTN transport channels, creating a nested architecture where PON operates as an integrated component of the OTN network rather than a separate network requiring external switching.
2Reliability
If switching devices are used to connect PON and OTN networks, then network interconnection is achieved, but network construction costs increase
Solution Approach 1:
The patent removes the switching device component from the network architecture, eliminating the need to purchase, deploy, and maintain expensive switching equipment. The direct connection approach uses only standard OLT and OTN transport equipment that are already present in the network.
Solution Approach 2:
The OLT equipment is designed to perform multiple functions: it serves both as the PON network controller and as the direct interface to the OTN transport network. This multi-functionality eliminates the need for separate switching devices and reduces overall network equipment requirements.
3Reliability
If channel frames are forwarded through switching devices, then network interconnection is achieved, but transmission latency increases
Solution Approach 1:
The patent removes the frame forwarding process through switching devices by establishing direct physical layer connectivity. Optical signals from the PON network are directly mapped onto OTN transport channels without intermediate frame processing, eliminating the time required for frame parsing, switching decisions, and frame reconstruction.
Solution Approach 2:
The patent implements a bypass mechanism where channel frames are transmitted directly from the PON network to the OTN network without stopping at switching devices. The direct physical layer connection allows signals to skip the intermediate processing stages entirely, rushing through the network interface in a single continuous transmission.
Data Source
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AI summary
Embodiments of this application disclose a service data transmission method, a related device, and a digital processing chip, to reduce a transmission latency of service data. The method in the embodiments of this application includes the following steps: A first device encapsulates a channel frame in a transmission frame, where the channel frame is used to carry service data. Next, the first device sends the transmission frame to a second device. A transmission manner of the channel frame is a non-decapsulation manner between an optical transport network and an access network.