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N Group0/1: Yangfei WANG z3471101 Amrita Manayil z3479501 Thangappan Madavan V K z5012717 Peng Fu z3452815 Shuo Sun z3486412 Total Slides :19 In-Operation.

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Presentation on theme: "N Group0/1: Yangfei WANG z3471101 Amrita Manayil z3479501 Thangappan Madavan V K z5012717 Peng Fu z3452815 Shuo Sun z3486412 Total Slides :19 In-Operation."— Presentation transcript:

1 N Group0/1: Yangfei WANG z Amrita Manayil z Thangappan Madavan V K z Peng Fu z Shuo Sun z Total Slides :19 In-Operation Network Planning

2 Traditional statical transport networks deal with limited network traffic. Statical networks can’t meet the uncertain network traffics surge. In-operation planning methods help to reconfigure networks automatically to meet uncertain network demands. Deals with Fault, Configuration, Accounting& Performance Managements. (FCAPS) Abstract

3 Traditional Network planning is a offline process Current transport and IP/MPLS layers are static and inflexible High Operational Expenditures (OPEX) Capacity over provisioning increases capital expenditures (CAPEX) Traditional Network Planning

4 Auto fashioned real time reconfiguration and reoptimization possible with light provisioning support Minimizes over provisioning and so reduces CAPEX In-Operation Network planning

5 Implementing In-Operation Planning Generalize MPLS Control planes for real time system recovery Add functional block between service and network layers North bound Interface - Entry point for planned configuration and Multiple Service Provision South bound Interface - Provisioning, Monitoring & Info retrieval

6 Traditional network planning In-operation network planning Traditional VS In-operation Planning

7 ABNO Controller - Network entrance point for NMS/OSS - Service layer entrance point for provisioning & Network coordination - Forward requests to PCE PCE - Serve path computation requests - PCE communication protocol (PCEP) carry path computation requests and PCE responses - Uses Border Gateway Protocol Link state (BGP-LS) to gather network topology and current network resources details ABNO Architecture

8 Process requests based on TE or Label switch path database (LSP - DB) Virtual Network Topology Manager (VNTM) co- ordinates virtual network topology The operations, administration & maintenance handler (OAM) responsible for for fault detection and correction. ABNO Architecture

9 Case I: Virtual Topology Reconfiguration Virtual topology reconfiguration after a failure disaster recovery Virtual topology reconfiguration includes management functional areas as follows:  Fault management  Configuration management  Accounting management  Performance management Never Stand Still Faculty of EngineeringElectrical Engineering and Telecommunication

10 A multilayer network consisting of four OXCs in the optical layer and three routers in the IP layer. After Failure -Fast reroute -State update -Virtual topology reconfiguration Virtual Topology Reconfiguration Disaster Recovery Never Stand Still Faculty of EngineeringElectrical Engineering and Telecommunication

11 Request from the NMS/OSS ABNO controller(1) PCE(2) Back-end PCE(3) Active solver(4) (PCRep) message (5) NO CHANGE New (virtual) layout Final approval(7) ABNO controller (6) New optimized layout (8) VNTM(9) provisioning manager (10)

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13 A new lightpath is created between R1 and R2, and as a result R2-R3 can be rerouted. Virtual Topology Reconfiguration Disaster Recovery Never Stand Still Faculty of EngineeringElectrical Engineering and Telecommunication

14 Virtual Topology Reconfiguration Disaster Recovery Steps involved: 1.Immediate action by the network to recover some of the traffic 2.Dissemination of the new network state 3.Root cause analysis to understand what failed and why 4.An operator-assisted planning process to come up with a disaster recovery plan 5.Execution of the plan, possibly in multiple steps 6.Reconvergence of the network after each step and in its final state 7.Reuse the resources for post-disaster priority connections. Never Stand Still Faculty of EngineeringElectrical Engineering and Telecommunication

15 Routes and spectrum allocation is done considering the state of network resources. Re-routing is done to remove bottlenecks and congestion. Re-Optimization is used to improve network efficiency. Case II Study ( Re-Optimization )

16 The width of the slot is a function of requested bit rate, FEC and modulation format. Never Stand Still Faculty of EngineeringElectrical Engineering and Telecommunication

17 Case II Study ( Re-Optimization ) Router A Control Plane Router B PCReq PCE back-end PCE Result of Computation front-end PCE NMS/OSS ABNO Controller Provisioning Manager 7 Flexi-grid core network PCE: Path Computation Element PCR: Pat Computation Reply ABNO: Application-Based Network Operations

18 References List Never Stand Still Faculty of EngineeringElectrical Engineering and Telecommunication 1.Velasco, L., Castro, A., King, D., Gerstel, O., Casellas, R., & Lopez, V. (2014). In-operation network planning. Communications Magazine, IEEE, 52(1), Jajszczyk, A. (2005). Automatically switched optical networks: benefits and requirements. Communications Magazine, IEEE, 43(2), S10-S Ash, J., & Farrel, A. (2006). A path computation element (PCE)-based architecture. 4. Gredler, H., Medved, J., Previdi, S., Farrel, A., & Ray, S. (2013). North-bound distribution of link-state and TE information using BGP. ID draft-ietf-idr-lsdistribution-03.

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