Bandwidth Modification in BoD Services via UNI Signaling
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Solution Overview
Problem
Existing ASON networks lack the ability for clients to dynamically modify bandwidth according to changing service traffic, as the control plane does not support bandwidth modification via the User Network Interface (UNI), leading to inflexible bandwidth allocation.
Innovation Solution
Implementing a method that allows bandwidth modification in Bandwidth on Demand (BoD) services by using the User Network Interface (UNI) for control plane signaling, enabling the modification of Virtual Container (VC) tunnels through the Generalized Multi-Protocol Label Switching (GMPLS) protocol, Link Capacity Adjustment Scheme (LCAS), and Generic Framing Procedure (GFP) technologies to adjust bandwidth in real-time without disrupting services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the control plane sets up SDH channels for Ethernet services via network management system, then service setup is supported, but bandwidth modification via UNI is not supported and client cannot initiate bandwidth changes
Solution Approach 1:
The patent makes the bandwidth allocation dynamic by allowing real-time modification of VC tunnel bandwidth through control plane signaling. The system transitions from static bandwidth allocation (pre-configured by network management) to dynamic bandwidth adjustment (initiated by clients via UNI), enabling bandwidth to be flexibly adapted according to actual service traffic needs without requiring network management system intervention for every change.
Solution Approach 2:
The patent enables clients to autonomously initiate bandwidth modification requests through the UNI interface. Instead of requiring network management system operators to manually adjust bandwidth, the system allows end clients to self-service by sending bandwidth modification messages via the control plane, which then automatically processes the bandwidth adjustment through VC tunnel modification.
2Productivity
If SDH channel is statically configured by network management system, then service setup is achieved, but real-time bandwidth adjustment according to traffic changes is not possible
Solution Approach 1:
The patent transforms the static SDH channel configuration into a dynamic system where bandwidth can be adjusted in real-time. By introducing control plane signaling that processes bandwidth modification messages from clients, the system enables continuous adaptation of bandwidth allocation based on actual traffic conditions, maintaining high service provisioning efficiency while adding operational flexibility.
Solution Approach 2:
The patent implements a feedback mechanism where clients monitor their service traffic and send bandwidth modification requests when traffic patterns change. The control plane receives these requests, processes them through VC tunnel bandwidth adjustment, and applies the changes to the SDH channel configuration, creating a closed-loop system that continuously optimizes bandwidth allocation based on actual service needs.
3Reliability
If Virtual Concatenation Group is statically mapped to SDH channel, then Ethernet service is established, but bandwidth cannot be modified without disrupting service
Solution Approach 1:
The patent enables dynamic bandwidth modification of VC tunnels while maintaining service continuity. By processing bandwidth modification requests through the control plane and adjusting VC tunnel parameters without tearing down and re-establishing connections, the system allows bandwidth changes to be applied incrementally and seamlessly, preserving service reliability while adding modification capability.
Solution Approach 2:
The patent prepares the system for bandwidth modification by establishing the control plane signaling path and VC tunnel configuration in advance. The preliminary setup includes configuring the network to accept bandwidth modification messages and prepare the VC tunnel structure to accommodate dynamic bandwidth changes, ensuring that when modification is needed, the service can be adjusted without disruption.
Data Source
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AI summary
A method for modifying bandwidth in a Bandwidth on Demand (BoD) service includes: a User Network Interface (UNI) client (UNI-C) sends the BoD service based bandwidth modification message to a UNI network (UNI-N) via control plane signaling, the bandwidth modification message carrying a bandwidth modification value; the UNI-N modifies bandwidth according to the bandwidth modification amount and a lower layer tunnel granularity. An apparatus for modifying bandwidth in a BoD service is also disclosed. According to the present invention, by adopting Generalized Multi-Protocol Label Switching (GMPLS) on the control plane and Link Capacity Adjustment Scheme (LCAS), Virtual Concatenation (VC) and Generic Framing Procedure (GFP) on the transport plane, the BoD service can be automatically set up and a client is able to modify service bandwidth according to changes of service traffic dynamically in real time.