FTTR Gateway Local Traffic Rerouting to Reduce PON Delay
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Passive optical networks (PONs) face inefficiency due to the capacity mismatch between the access network and the customer's in-home or in-office network, leading to unnecessary routing of in-home traffic back to the optical line terminal (OLT) and then back to the home, which increases delay and poses privacy risks.
Innovation Solution
An intelligent network gateway is introduced between the access PON and the home PON, which filters and reroutes in-home traffic within the home network, utilizing bandwidth allocation maps to preempt downstream signals and allow local communication between devices, thereby reducing the need for traffic to traverse the entire network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If in-home traffic is routed through the access PON to the OLT and back, then network compatibility is maintained, but transmission delay increases and network efficiency deteriorates
Solution Approach 1:
The patent segments the PON network into access PON and home PON domains, with the ONU gateway acting as a boundary device that filters and locally routes in-home traffic, preventing it from traversing the entire network path to the OLT and back, thereby reducing transmission delay
Solution Approach 2:
The ONU gateway serves as an intermediary device between the access PON and home PON, performing traffic filtering and local routing functions that eliminate the need for in-home traffic to reach the OLT, thus reducing delay while maintaining network compatibility
2Productivity
If all traffic is routed through the OLT, then centralized control is maintained, but network bandwidth is wasted and efficiency decreases
Solution Approach 1:
The patent extracts in-home traffic from the access PON downstream signal at the ONU gateway, separating it from traffic destined for the OLT, and routes it locally through the home PON, thereby eliminating unnecessary bandwidth consumption on the access network
Solution Approach 2:
The ONU gateway performs preliminary filtering and routing of in-home traffic before it enters the access PON network, preventing bandwidth waste by keeping local traffic local, while still maintaining centralized control through coordination with the OLT
3Object-affected harmful factors
If in-home traffic traverses the access network, then network coverage is maximized, but privacy security is compromised
Solution Approach 1:
The ONU gateway acts as a privacy-protecting intermediary that intercepts in-home traffic within the home network domain, preventing it from暴露在 the access network where it could be intercepted, while still allowing the network to cover the same geographical area
Data Source
AI summary
A method performed by an optical network unit (ONU) gateway connecting an access passive optical network (PON) and a home PON for rerouting in-home traffic data back to the home PON. The method includes receiving, by the ONU gateway, an access PON downstream optical signal from an optical line terminal (OLT). The access PON downstream optical signal includes first access traffic intended for the ONU gateway and second access traffic not intended for the ONU gateway. The ONU gateway also receives a home PON upstream optical signal from an ONU of the home PON. The home PON upstream optical signal includes in-home traffic data and upstream access data. The ONU gateway generates a composite downstream signal that includes the first access traffic intended for the ONU gateway and the in-home traffic data. The ONU gateway transmits the composite downstream signal to all ONUs of the home PON.