PTL-PON Packet Transport Layer Access Network Reliability

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Solution Overview

Problem

Existing packet transport layer (PTL) technologies do not guarantee packet transmission quality across access networks, making it difficult to identify and manage errors within the access network, as they primarily focus on metro and core networks.

Innovation Solution

A PTL-PON system that includes a PTL connection server connected to optical network terminals (ONT)/optical network units (ONU) and an optical line termination device (OLT), managing and setting connections between ONT/ONU endpoints, bundling channels into paths in metro and core networks, and controlling packet formats for reliable end-to-end transmission.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If PTL type is applied to guarantee packet transmission quality, then reliability is improved, but adaptability to access network deteriorates

Engineering Contradiction:

Improvepacket transmission qualityVSAvoidapplicability to access network

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent applies PTL connection management capabilities to the PON access network, making the system universally applicable across both access and core networks. The PTL connection server manages connections from ONT/ONU endpoints through OLT to PTL switches, enabling packet transport layer quality guarantee in the access network while maintaining compatibility with existing PTL infrastructure in metro and core networks.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Ease of manufacture

If E-PON type is applied for Ethernet communication, then ease of manufacture is improved, but reliability of packet transmission deteriorates

Engineering Contradiction:

Improveease of application to EthernetVSAvoidpacket transmission quality guarantee

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The patent introduces a PTL connection server as an intermediary between the E-PON access network and the PTL packet transport network. This mediator manages PTL connections for ONT/ONU devices, translating Ethernet-based access traffic into PTL-managed packet flows, thereby enabling reliable packet transmission quality without requiring changes to the underlying E-PON infrastructure.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Reliability

If PTL connection management is applied in access network, then reliability is improved, but device complexity increases

Engineering Contradiction:

Improveend-to-end packet transmission qualityVSAvoidconnection management complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent merges PTL connection management functions into the existing network architecture by having the PTL connection server manage connections across multiple network domains (access, metro, core) through a unified interface. The server handles connection setup, modification, and teardown for PTL channels from ONT/ONU to PTL switches, consolidating management complexity into a centralized component rather than distributing it across multiple devices.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS8781323B2Packet transport layer passive optical network (PTL-PON) providing system and method

Publication Date: 2014.07.15 ELECTRONICS & TELECOMM RES INST

AI summary

A packet transport layer passive optical network providing method controls an optical line termination device and an optical network terminal or an optical network unit of the subscriber end to transport packet transport layer passive optical network packets between the optical network terminals or the optical network units and the optical line termination device, and the optical network terminals or the optical network unit of the subscriber end becomes an end point of a packet transport layer connection.