Integrated PON Chassis Architecture to Reduce Rack Space
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Solution Overview
Problem
Conventional data center networks face challenges with rack space consumption, power consumption, cooling requirements, and management complexity due to the use of ToR and EoR switches, which also require extensive cabling and active Ethernet connections.
Innovation Solution
An integrated Passive Optical Network (PON) chassis architecture is introduced, featuring a chassis that mounts on top of racks, housing multiple ONUs or ONTs, which replace ToR or EoR switches, utilizing PON technology for server-to-switch connectivity, reducing rack space, power consumption, and simplifying management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If ToR or EoR switches are used for server connectivity, then network connectivity is provided, but rack space is consumed and extensive cabling is required
Solution Approach 1:
The patent replaces traditional electrical Ethernet switches with optical network terminals (ONTs) that use passive optical network (PON) technology. This substitution eliminates the need for extensive copper cabling and active electrical connections, reducing rack space requirements while maintaining network connectivity through optical fiber infrastructure
Solution Approach 2:
The invention extracts the network termination function from traditional rack-mounted switches and relocates it to optical network terminals that can be positioned outside the rack or in dedicated optical enclosures. This extraction removes the switching hardware from the rack environment, freeing up valuable rack space for server equipment
2Ease of operation
If ToR or EoR switches are deployed, then server interconnection is enabled, but power consumption increases
Solution Approach 1:
The patent replaces active electrical switching with passive optical networking technology. PON networks use passive optical splitters instead of active switching hardware, eliminating the need for power-consuming switching components while enabling server interconnection through optical fiber infrastructure
Solution Approach 2:
The optical network terminals and passive optical splitters operate without requiring external power sources. The PON infrastructure provides server interconnection capabilities autonomously through optical signal processing, eliminating power consumption associated with traditional active switches
3Ease of operation
If ToR or EoR switches are used, then network connectivity is provided, but cooling requirements increase
Solution Approach 1:
The patent replaces power-consuming active switches with passive optical networking equipment. Since passive optical splitters and optical terminals generate minimal heat compared to electrical switches, the cooling infrastructure requirements are significantly reduced while maintaining network connectivity
4Ease of operation
If extensive cabling is used for ToR or EoR switches, then connectivity is achieved, but installation complexity and cost increase
Solution Approach 1:
The patent replaces extensive copper cabling infrastructure with optical fiber-based PON networks. The passive optical network architecture uses a tree topology with optical splitters that can serve multiple endpoints from a single fiber run, dramatically reducing cabling complexity and installation costs while achieving the same connectivity goals
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 PON chassis architecture saves rack space, reduces power consumption, lowers cooling needs, and simplifies network management by integrating ONUs into a compact, low-power, fanless design, while providing efficient server connectivity and cost-effective installation.
Implementation Method 1
The fiber splitter includes N:M optical ports, with N optical ports communicatively connected to the one or more OLTs and M optical ports communicatively connected to corresponding optical ports on the plurality of modules
Implementation Method 2
The housing can be air cooled via a plurality of openings enabling airflow, and wherein the chassis includes a fanless design
Data Source
AI summary
An integrated Passive Optical Network (PON) chassis architecture is provided for data center networks. The chassis includes a housing configured to connect on top of a rack; a plurality of modules that are selectively insertable in the housing, each of the plurality of modules supporting one or more Optical Network Units (ONUs) or Optical Network Terminals (ONTs) for operation in a Passive Optical Network (PON); and a fiber splitter configured to optically connect to each of the plurality of modules and to a PON distribution network that connects to one or more Optical Line Terminals (OLTs).