Q5 13 network interworking including ip multiservices networks
Download
1 / 18

Q5/13: Network Interworking Including, IP Multiservices Networks - PowerPoint PPT Presentation


  • 105 Views
  • Uploaded on

Q5/13: Network Interworking Including, IP Multiservices Networks. Ghassem Koleyni, Rapporteur Q5/13 5 November 2002. Our Mandate. Consideration of IP based backbone networks and their interworking and interaction with traditional networks and associated services.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Q5/13: Network Interworking Including, IP Multiservices Networks' - dylan-slater


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
Q5 13 network interworking including ip multiservices networks

Q5/13: Network Interworking Including, IP Multiservices Networks

Ghassem Koleyni, Rapporteur Q5/13

5 November 2002


Our mandate
Our Mandate Networks

  • Consideration of IP based backbone networks and their interworking and interaction with traditional networks and associated services.

  • Determination of how best to carry narrow-band and broadband services in a fully integrated IP based network.

  • Definition of protocol requirements for interworking of services that go beyond those provided by traditional networks. Typical examples might include, distance learning, e-commerce, text to voice (and vice versa), video on demand.


Items for study
Items for study Networks

  • Harmonization of interworking requirements developed in the ITU-T with those developed in other standards bodies and industry organisations.

  • Analysis of interworking and definition of protocol requirements between the newly developed protocols and traditional networks.

  • Analysis of interworking and definition of protocol requirements between the newly developed approaches in a heterogeneous network environment (e.g. different service providers using different technologies in their national networks and the related interaction, such as BICC interaction with SIP).


Items for study continued
Items for study - continued Networks

  • Analysis and definition of protocol requirements for service interworking for a potential evolving set of newly defined services.

  • Follow up on the results initiated in Draft Recommendation Y.1401 and in the I.5xx series of recommendations.


Q5 13 activities
Q5/13 Activities Networks

  • Present

    • ATM – MPLS interworking

    • FR – MPLS interworking

    • Voice Services over MPLS

  • Planned

    • Ethernet over MPLS

    • TDM over MPLS

    • Service interworking for all X – MPLS interworking

  • ITU-T SG13 Lead Study Group for IP related matters and on Multi-protocol and IP-based networks and their internetworking

  • Q5/13 mandate is to work on General Interworking including IP-based Multi-service Networks


Network structure
Network Structure Networks

  • Today’s Networks

  • Near term evolution

  • Mid-term realization


Today s network architectures

PSTN/ISDN Networks

Frame Relay

Networks

IWF

IWF

IWF

IWF

IWF

IWF

IWF

IWF

IWF

Wireless Access

ATM Networks

Today’s Network Architectures

IP/MPLS

Networks

Radio Access Networks

Ethernet

Networks

  • Multiple, interworked, interdependent networks

  • Diversity of control and management architectures

  • Capacity and performance bottlenecks

  • Each network has its own control plane and management plane


Near term evolution

PSTN/ISDN Networks

PSTN/ISDN

Wireless access

IWF

IWF

IWF

IWF

IWF

Near Term Evolution

SS7 Network

Q & X series Rec.

Rec. Q.931

Frame Relay Networks

Rec. Q.700 series

Rec. I.580

Rec. Q.2931, PNNI

FR OSF & NM

Rec. I.555

Rec. I.580

PSTN/ISDN OSF & NM, M series Rec.

IETF RFCs

ATM Networks

IP-based Networks

Rec. Y.1310

ATM OSF & NM, M series Rec.

SNMP based

  • Prose

  • Convergence on ATM core networking enables initial stage of unified management and control

  • Enhanced performance and QoS capabilities for multi-services over common platform

  • Cons

  • Lack of service transparency between IP based services and ATM/PSTN services

OSF = Operating Support Function


Mid term realization convergence on mpls core

IWF Networks

IWF

IWF

IWF

IWF

IWF

Mid-Term Realization - Convergence on MPLS Core

ATM

Networks

Frame Relay

Networks

MPLS NETWORK

Frame Relay

Networks

Ethernet

Networks

Ethernet

Networks

ATM Networks

Label Switching Router (LSR)

Label Switched Path (LSP)

  • Requires well defined interworking mechanism for all services

    • Transfer plane functions

    • Control plane functions

    • Management plane functions


Mpls gateway networking solution implications

End-to-end SPVC/SVCs Networks

PNNI Networking

  • L2/L3 VPN services

  • Traditional L2 services

  • L2/L3 VPN services

  • Traditional L2 services

IWF

IWF

Stacked LSPs

MPLS Gateway Networking Solution implications

Multiservice Access Networks

Core Network

Multiservice Access Networks

MPLS Gateway

MPLS Gateway

ATM

ATM

FR

CR-LDP/RSVP-TE

FR

L2 Access

Networks

L2 Access

Networks

PNNI

PNNI

Ethernet

Ethernet

MPLS Core

IP-based

Networks

IP Routing

IP Routing

  • L3 VPN and other IP services

  • L3 VPN and other IP services

IP-based

Networks

Exploiting label stacking capabilities of MPLS


Example atm mpls network interworking

LSP “tunnel” Networks

IWF

ATM Network

A

IWF

ATM Network

B

IWF=Interworking Function

Example ATM-MPLS Network Interworking

LSR

In MPLS, network interworking and tunnelling concepts are used interchangeably


Example of encapsulation format
Example of Encapsulation Format Networks

Transport Label

Label Stacking

Interworking Label

Control Fields and Service Specific Header (SSH)

Payload

Control Field & SSH

Transport label

Interworking label

Payload

MPLS Frame


Interworking challenges sharing of lsps

ATM Networks

MPLS Transport LSP

ATM

MPLS Transport LSP

FR

FR

Interworking Challenges-Sharing of LSPs

How to ensure QoS transparency if multiple services share same transport LSP, e.g., bandwidth sharing between ATM & FR?


Interworking challenges qos

DBR Networks

Diffserv Class

ATM Transfer

Capability

EF

SBR.1

EF

AF1/AF2

SBR.2/.3

Interworking Challenges-QoS

ATM

MPLS tunnelwith QoS x

ATM

Examples of service mapping

MPLS tunnelwith QoS y

  • Mapping of ATM services to diffserve classes for preservation of QoS transparency

  • Should the LSPs be segregated based on QoS classes?


Interworking challenges oam fault management

LSP “tunnel” Networks

Interworking Challenges- OAM & Fault Management

I.610

Y.iw

Y.1711

IWF

IWF

ATM Network

A

ATM Network

B

Q3, M3

?

OSF/TMN

SNMP

= Possible trouble location

  • How fault and performance monitoring capabilities between ATM and MPLS networks can be related?

  • How do the management I/F communicate (I.e., TMN (CMIP) and SNMP)?

  • How SLA performance management is handled?


Interworking challenges protection switching

ATM Networks

MPLS Network

MPLS

working path

ATM NWK

ATM

working path

ATM

protection path

MPLS

protection path

Interworking Challenges -Protection Switching

  • Protection switching by OAM or fast reroute by control plane?

    • IETF adopting restoration based on rerouting capabilities (control plane)

  • Local repair or end-to-end protection?

    • Is local repair manageable?

  • ITU-T working on protection switching model based on extensions of basic SDH (Synchronous Digital Hierarchy) approach


Interworking challenges traffic management

LSP “tunnel” Networks

Interworking Challenges-Traffic Management

I.371 & TM4.1

?

RSVP & Diffserv

IWF

Well defined

TM

capabilities

ATM Network

A

ATM Network

B

IWF

= Congestion

  • RSVP providing some flexibilities

  • Diffserv require substantial enhancement to LSR traffic management capabilities, i.e. CAC, policing



ad