Lucy Yong Young Lee IETF CCAMP WG GMPLS Extension for Reservation and Time based Bandwidth Service

2 GMPLS Network IP Network success motivates people to develop network intelligence in optical transport network One goal of GMPLS network is to allow user to request a bandwidth from optical transport network when it needs via signaling protocol at user network interface (UNI) –Peer model: network and users are in the same trust domain –Overlay model: user attaching network w/o network knowledge and network advertising the user reachability User Connection Controller (Control Plane) Data Plane User Network UNI

3 GMPLS Instant BoD Service Model Customer service request comes at service connection time and network set up connection instantly However, this service model is rarely deployed in carrier network today because –Optical transport services are relatively static and may be planed ahead of service time –Hard to predict user demand and guarantee the service when it needs –Challenge for control plane security when UNI is used –Infrastructure complexity under multiple administration domains –May take time to run path clean in data plane after bandwidth is allocated –Present a big challenge for service operation and back office integration

4 How to raise GMPLS value for service? Today, carrier use control plane to set up soft permanent connection (SPC) for customer order to achieve provisioning acceleration However, although GMPLS is used within network, the procedure from customer request to bandwidth establishment takes tedious processes Could GMPLS be used to improve the process for reservation and time based service? Could GMPLS be used to improve service intelligence?

5 Service Example Soft Permanent Connection (SPC) Customer Order Pre- Provisioned Pre- Provisioned Management Plane Control Plane Data Plane Customer order is ahead of service time, access connection is nailed up ahead Soft Permanent Connection is set up when service time arrive Customer may want to change the connection during the service time without restart a new order. For example, connection modification or bandwidth modification These could be done by reservation based and time based bandwidth service SPC provisioning

6 Reservation Based Bandwidth Service Definition: bandwidth service can be booked prior to the service time, when the service time arrives, the connectivity will be available to the user Reservation based service decouples service request and service usage. It has some advantages –Service can be better guaranteed at usage time –Give provider a chance to prepare network resource –Fit for most of large and long term bandwidth demand –Allow provider to verify data plane path ahead –Align with today’s private line service model –Enable time based bandwidth services –Enable other advanced bandwidth services such as L1&2VPN and Bandwidth trading Carrier can implement reservation based service in different ways. It does not have to allocate network bandwidth at booking time

7 Time Based Bandwidth Service Definition: Connection can be described as a function of time such as time of day or day of week. In other words, connection can vary in a time pattern Connection service pattern could be converted as time based policy profile Time based policy profile is sent to connection origination node, when the event time comes, control plane will take the action such as path setup, teardown, or modification As a result, connection is managed as a function of time. For example, connection is up between A to B for certain period and up between A to C for another period

8 Time Based Connection Example Rule TypeTime DurationAction TOD Time of Day 8AM-5PMMaintain Connection OtherTerminate Connection DOW Day of Week M-FMaintain 600 MBW Sa-SuMaintain 200MBW Combined rule could be implemented

9 Reservation Element A new component to the control plane –Allow user specifying a service ahead of service time –Validate a service request –Store service requests –Initiate bandwidth request when service time arrives –Able to handle time based bandwidth request User Connection Controller (Control plane) Data Plane User Network Reservation Element (RE) OSS Customer Request This could be GMPLS UNI - RE and Control Plane is in the same trust domain - RE could act as user agent

10 Connection Controller Add Policy manager and event manager in CC Manage a connection path with a policy Policy could be driven by an event, state or time Policy profile contains connection schedules Control plane can execute the schedule at connection origination point. 1) CM get request from RE 2) CM setup connection first 3) CM send policy to PM 4) PM register event to ER 5) CM send confirmation A) ER trigger an event to PM B) PM let CM take an action C) CM execute the action Connection Manager (CM) Policy Manager (PM) Clock Event Register (EM) Connection Controller Module (CCM) Connection Request from RE CCM 13 A4 B 2 5 C

11 GMPLS UNI Extension Use GMPLS UNI to support reservation and time based bandwidth service, some protocol enhancement is needed to specify time based service, for example –connection policy –time based function –service modification –service cancellation

12 Bandwidth Resource Reservation Reservation based service allow provider to plan network resource based on the booking –A bandwidth pool could be engineered ahead based on the booking, no need to allocate bandwidth at booking time. However –An individual bandwidth could be allocated ahead if requested under certain condition such as time and price In case, an overbook happens, carrier will give a “vulture” to the customer whose service get bumped

13 Could this be done in management plane? Yes, today this is done by management plane with tedious processes However, one of control plane objectives is to simplify existing OSS and improve service automation This could be also a part of control plane function or integrated function between control plane and management plane How optical control plane facilitate management plane to automate existing bandwidth services and enable more advanced services is something for CCAMP to think about

14 Conclusion Reservation and time based bandwidth service is another way to provide automatic bandwidth service for optical transport network It is valuable to consider how GMPLS control plane could support these service models automatically The draft contain more information draft-yong-ccamp-ason-gmpls-autobw-service.txt Get a consensus from group if this is a valued work for the WG? If yes, accept the draft as WG draft and work on the solution in architecture and protocol.