Optical Line Terminal Virtual DBA Segmentation
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Solution Overview
Problem
Conventional optical line terminals face resource waste due to inefficient dynamic bandwidth allocation (DBA) across multiple services in optical access networks, leading to excessive bandwidth allocation and calculation resource wastage.
Innovation Solution
The optical line terminal operates multiple virtual dynamic bandwidth allocation units, using service control, transfer control, and aggregation control units to manage transmission requests and grants based on specific service requirements, reducing unnecessary calculations and resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple DBAs are operated on a single system to manage different services, then service-specific QoS control is improved, but calculation resource waste increases due to redundant processing of the same transmission requests
Solution Approach 1:
The patent segments the DBA function into multiple virtual DBAs, each dedicated to a specific service type. This segmentation allows service-specific QoS control while avoiding redundant calculations by ensuring each virtual DBA processes only transmission requests relevant to its service domain, eliminating the resource waste associated with multiple DBAs processing the same requests.
2Adaptability or versatility
If multiple DBAs operate independently without coordination, then service-specific bandwidth allocation is improved, but bandwidth resource waste increases due to excessive allocation
Solution Approach 1:
The patent introduces a merging engine that collects transmission grants from multiple virtual DBAs and consolidates them into a unified transmission grant. This merging process eliminates redundant bandwidth allocations by combining overlapping grants, ensuring that bandwidth resources are allocated efficiently without waste while maintaining service-specific control capabilities.
3Productivity
If a single DBA processes all transmission requests, then calculation resource efficiency is improved, but service-specific QoS control capability deteriorates
Solution Approach 1:
The patent implements a universal DBA architecture where a single DBA processes transmission requests from multiple services by identifying the service type and routing to appropriate virtual DBAs. This universal approach maintains calculation resource efficiency while providing service-specific QoS control through the virtual DBA layer, resolving the contradiction between efficiency and adaptability.
Data Source
AI summary
An ONU operating virtual DBAs that, according to a transmission request, calculate bandwidth to be allocated to a transmission request source and output a transmission grant, and includes a service control unit that generates virtual DBAs according to service requests, a transfer control unit that, when receiving the transmission request, selects the virtual DBA that is a transfer destination of the received transmission request, based on a transfer rule table as transfer rule information indicating the correspondence relationship between the transmission request source and the virtual DBA that is the transfer destination, and transfers the transmission request to the selected virtual DBA, and an aggregation control unit that aggregates the transmission grants output by the virtual DBAs, based on an aggregation rule table as aggregation rule information indicating the correspondence relationships between destinations of the transmission grants and the virtual DBAs that can be transmission sources of the transmission grants.