IETF72 ANCP WG1 ANCP Applicability to PON draft-bitar-wadhwa-ancp-pon-00.txt Nabil Bitar, Verizon Sanjay Wadhwa, Juniper Networks

IETF72 ANCP WG 1

ANCP Applicability to PON draft-bitar-wadhwa-ancp-pon-00.txt

Nabil Bitar, Verizon

Sanjay Wadhwa, Juniper Networks

IETF72 ANCP WG 2

Agenda

PON Specific Terminology Drivers for ANCP in PON based Broadband Networks Use Cases Proposal

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PON Specific Terminology

PON Point to Multipoint fiber to the premise (or curb) network architecture in

which unpowered splitters are used to split an optical signal on single optical fiber from CO to multiple premises

Access Node Complex (ANX) The Access Node decomposed by two geographical functions, performed

by OLT and ONU/ONT. The general term Access Node (ANX) is used when describing functionality which doesn't depend on the physical location but rather on the "black box" behavior of OLT and ONU/ONT

OLT (Optical Line Terminal) : Located in the Service provider's central office. Terminates and aggregates multiple PONs on the user side, and interfaces with the service element (NAS) providing subscriber management.

ONT (Optical Network Terminal) : terminates PON on the network side and provides PON adaptation. User-side interface and location dependent upon Network Deployment.

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Drivers for ANCP in PON based Broadband Networks

ONT (contd). FTTP : Fiber all the way to the premises. ONT has Ethernet (FE/GE)

connectivity with HGW. In case of MDU, multi-subscriber ONU resides in basement or wiring closet and has FE/GE connectivity with each CPE.

FTTC : Fiber terminated outside the premise. Last leg could be via xDSL (typically VDSL). OLT and ONT together referred to as “PON FED DSLAM”.

PON-Customer-ID Identifier which uniquely identifies the ANX, and the access loop

logical port to the customer premise. Logically composed of information containing identification of the OLT, the PON port on the OLT, the ONT, and the port on the ONT. When acting as an intermediate agent, the OLT can encode PON-Customer-ID in the "Agent-Circuit-Identifier" Sub-option in Option-82 of the DHCP messages.

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Drivers for ANCP in PON based Broadband Networks

Tight coordination required between NAS and ANX to implement triple-play services with necessary QoE, including end-2-end bandwidth optimized video delivery.

Coordination also required between components of ANX (OLT and ONT) for optimized video delivery.

Interaction needs to be real-time as services are requested via network or application level signaling.

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Use Cases

Unified Video Resource Control Multicast Admission Control VoD Admission Control

Multicast Conditional Access Access Topology Discovery Remote Connectivity Check

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High Level Communication Framework

NAS OLT ONTPON

ONT HGW

HGW

HGWANCP

Control Request

Control Request

Control Response

Control Request

Admission RequestAdmission Request

Admission Response

Admission Response

Information Request

ANCP

Information Request

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Unified Video Resource Control Option1: All control Centralized on NAS

Access and admission control for multicast performed by NAS.

IGMP from the subscriber is processed and terminated on the NAS.

Multicast replication distributed to ANX (ONT and OLT) under the control of NAS

NAS also participates in bandwidth-based admission control for VoD (triggered by VoD signaling and a policy manager query).

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Unified Video Resource Control Option1: All control Centralized on NAS (cont.)

NAS performs video (unicast and multicast) bandwidth accounting

Bandwidth-based admission control takes into account the following constraints: Subscriber Bandwidth PON Bandwidth OLT-NAS Link Bandwidth

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NAS OLT ONTPON

ONT HGW

HGW

HGWANCP

IGMP JOIN (S/*, G)

Access Control &Subscriber B/W, PON B/Wand OLT Link B/W based Admission Control

ANCP Replication Start{ <S/*,G>, Customer-Port-ID}

ANCP Replication Start{ <S/*,G>, Customer-Port-ID}

Multicast Flow (S,G) on Multicast VLAN

Multicast Flow (S,G) forwardedon unidirectional <Multicast GEM-PORT> on the PON by OLT.

Multicast Flow (S,G) forwarded on Customer-Port by ONT/ONU.

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NAS OLT ONTPON

ONT HGW

HGW

HGWANCP

IGMP LEAVE (S/*, G)

Admission Control<Resource Released>

ANCP Replication Stop{ <S/*,G>, Customer-Port-ID}

ANCP Replication Stop{ <S/*,G>, Customer-Port-ID}

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NAS OLT ONUPON

ONT

HGW

HGW

HGWANCP

Subscriber B/W, PON B/Wand OLT Link B/W based Admission Control

PolicyServer

ApplicationServer

Admission Request

Admission Response

VoD Request

Admission Request

Admission Response

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ANX (OLT and ONT) snoops IGMP to create replication state.

ANX performs bandwidth admission control on PON bandwidth.

NAS performs bandwidth admission control on subscriber bandwidth and OLT link bandwidth triggered by “admission requests” from ANX for multicast.

NAS interacts with OLT using ANCP (for PON bandwidth accounting) to do admission control for VoD.

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NAS OLT ONTPONHGW

HGWANCP

IGMP JOIN (S/*, G)

Subscriber B/W & OLT Link BW Admission Control

Admission-Request{ Flow, Customer-Port-ID}

IGMP SnoopingIGMP Snooping

Access Control &PON B/W Admission Control

Pass Admission-Request{ Flow, Customer-Port-ID}

Admission-Reply-Pass{ Flow, Customer-Port-ID}

Update Replication State

Admission-Reply-Pass{ Flow, Customer-Port-ID}

Update Replication State

Access Control

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NAS OLT ONUPONHGW

HGWANCP

IGMP JOIN (S/*, G)

Subscriber B/W & OLT Link BW Admission Control

Admission-Request{ Flow, Customer-Port-ID}

IGMP SnoopingIGMP Snooping

Access Control &PON B/W Admission Control

Pass Admission-Request{ Flow, Customer-Port-ID}

Admission-Reply-Fail{ Flow, Customer-Port-ID}

Release PON B/W Update Replication State

Admission-Reply-Fail{ Flow, Customer-Port-ID}

Remove Replication State

Fail

Access Control

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NAS OLT ONUPON

ONT

HGW

HGW

HGWANCP

PolicyServer

ApplicationServer

Admission Request

Admission Response

VoD Request

Admission Request

Admission Response

Subscriber B/Wand OLT Link B/WAdmission Control

Admission-Request { Bandwidth, Customer-Port-ID}

PON B/WAdmission Control

Pass Admission-Response { Customer-Port-ID}

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Multicast Conditional Access

Two approaches for Network based Conditional Access:

1. Centralized on NAS. It could be triggered by “admission request” from ANX using ANCP.

2. Distributed to ANX (OLT and ONT). White and Black lists provisioned on OLT and ONT by NAS using ANCP. Access to groups in the Black list dropped closest to the

subscriber (on the ONT). Requests for group which are not blocked by Black list can

be propagated upstream towards OLT and NAS for bandwidth based admission control.

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Access Topology Discovery

NAS can discover DSL sync rate via ANCP for DSL local loops on a PON-fed Access Node. ONT (GPON Fed AN) can inform the sync rate via ANCP to the OLT. OLT can inform the sync rate via ANCP to the OLT. OLT can also inform the bandwidth of the OLT uplink to the BNG

(this is relatively static, but NAS needs to always have an accurate picture of the available bandwidth on OLT uplink ).

NAS OLTGPON

FedDSLAM

PON

ONT HGW

HGW

HGW

ANCPHGW

DSL1

DSL2

DSLn

ANCP

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Remote Connectivity Checks

Triggered by a local management interface, the NAS can use the ANCP (Control Request Message) to initiate an Access Loop test between Access Node and HGW.

On reception of the ANCP message, the OLT can trigger native OAM procedures defined for BPON in [G.983.1] and for GPON in [G.984.1].

The Access Node can send the result of the test to the NAS via a Control Response message.

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Proposal

Incorporate use-cases for ANCP as applicable to PON, and corresponding requirements for ANX and BNG, into the ANCP framework draft.

Add protocol extensions, and corresponding handling on ANX and BNG for these use-cases to the protocol draft.

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Questions/Discussion

Thanks!

Documents

IETF72 ANCP WG1 ANCP Applicability to PON draft-bitar-wadhwa-ancp-pon-00.txt Nabil Bitar, Verizon Sanjay Wadhwa, Juniper Networks