Hybrid P2MP and P2P Optical Network Architecture
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Solution Overview
Problem
Existing optical network designs, particularly passive optical networks (PONs), face challenges in maximizing both upload and download bandwidth for end users, with PONs offering cost-effectiveness but limited flexibility and AONs providing flexibility at higher costs due to complex active electronics.
Innovation Solution
A hybrid network system incorporating both point-to-multipoint (P2MP) and point-to-point (P2P) modules, where the P2MP module uses wavelength division multiplexing for efficient downstream data transmission and the P2P module employs time division multiplexing for flexible upstream data management, leveraging passive splitters for cost-effectiveness and active components for high-speed services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If PON architecture is used, then cost-effectiveness is improved, but bandwidth flexibility and upload speed are worsened
Solution Approach 1:
The patent combines PON and AON architectures into a hybrid system where PON provides cost-effective downstream connectivity while AON provides flexible upstream connectivity. The OLT includes both P2MP module for PON and P2P module for AON, allowing simultaneous operation of both architectures over the same optical infrastructure.
Solution Approach 2:
The optical line terminal is designed with multi-functionality, serving both as a PON OLT and an AON switch. The same optical network can support both passive optical network terminals and active optical network terminals, providing universal service delivery through a single infrastructure.
2Adaptability or versatility
If AON architecture is used, then bandwidth flexibility is improved, but device complexity and cost are worsened
Solution Approach 1:
The patent merges the functional capabilities of PON and AON into a single hybrid architecture. The OLT integrates both P2MP (PON) and P2P (AON) modules, allowing the system to provide AON-level flexibility only where needed while using simpler PON architecture elsewhere, thereby reducing overall device complexity compared to pure AON.
Solution Approach 2:
The hybrid architecture applies different network architectures to different traffic directions and user needs. P2MP is used for downstream broadcast traffic where simplicity is adequate, while P2P is used for upstream traffic requiring flexible bandwidth allocation, optimizing the complexity-performance tradeoff locally.
3Ease of manufacture
If P2MP connection is used for downstream, then cost-effectiveness is improved, but upload speed is worsened
Solution Approach 1:
The patent combines P2MP downstream connection with P2P upstream connection in a bidirectional hybrid architecture. The same optical fiber and passive splitters are used for cost-effective downstream delivery, while separate P2P upstream paths provide high-speed upload capability through active switching and dedicated bandwidth allocation.
Solution Approach 2:
The hybrid architecture creates asymmetric connectivity where downstream uses P2MP topology and upstream uses P2P topology. This asymmetry allows optimization of each direction independently: P2MP for cost-effective broadcast downstream and P2P for high-speed dedicated upstream.
4Speed
If P2P connection is used for upstream, then upload speed is improved, but device complexity is worsened
Solution Approach 1:
The patent merges P2MP and P2P modules within the same OLT device, allowing P2P upstream connectivity to be provided only to specific users or services that require high upload speeds, while other users continue to use simpler P2MP upstream. This selective deployment reduces overall device complexity compared to providing P2P to all users.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The hybrid system achieves high-speed download capabilities and flexible upload management, optimizing network efficiency and cost by combining the strengths of P2MP and P2P technologies, ensuring reliable and efficient data transmission across the network.
Implementation Method 1
the P2MP module uses wavelength division multiplexing for efficient downstream data transmission
Implementation Method 2
the P2P module employs time division multiplexing for flexible upstream data management
Data Source
AI summary
According to one example, a system includes: a point-to-multipoint (P2MP) module providing a P2MP connection to at least one coexistence element of a network; a point-to-point (P2P) module providing a P2P connection to a coexistence element, wherein the system is configured to receive data over the P2MP connection and transmit data over the P2P connection.