converged media networks

©Net Insight AB

Converged Media NetworksHow broadcast quality video and voice/data services can be integrated in a broadcast environment

Converged Media Networks ©Net Insight Inc.

Convergence?

• WHY Convergence?• HOW Convergence?• WHEN Convergence?


Traditional media network design

• Point-to-point• Unidirectional• Handles one service



• Complexity grows linearly– Costs grow linearly– Operation costs grow linearly

• Long provisioning times• Complex resource management• Inflexible



• Adding new services further complicates network– Multiple systems to operate, support,

educate, have spares etc etc


Converged media network

• Topology defines your bandwidth resources– Operator works with service and

resource management• Bandwidth can be used for

Video/Data/Voice– One network to manage– Service ubiquitous (Ethernet, ASI, SDI,

T1….)


Converged media network

• Switched network– Fast provisioning (minutes instead of

weeks/months)– Flexible– Any to any connectivity– Multicast capability (save on capacity)

©Net Insight AB

Improve existing infrastructure

TDM channelization with GMPLS interface

- Improved utilization

- 100% QoS

- Traffic engineering

- Multicast


Broadband networking of today

Guaranteed ServiceHigh reliability

Packet SwitchingPacket SwitchingSynchronous TDMSynchronous TDM

SDH/SONETSDH/SONET ATMATM Gigabit EthernetGigabit Ethernet

InexpensiveFlexibility

Best of both worlds neededGuaranteed QoS

Dynamic Provisioning Simple and flexible SLAs

Real-time supportTraffic Engineering

ExpensiveFlexibility


Sources: Bennett, et al, “Delay Jitter Bounds and Packet Scale Rate Guarantee for Expedited Forwarding”, INFOCOM 2001.Charny and Le Boudec, “Delay Bounds in Network with Aggregate Scheduling”, QoFIS 2000, Berlin, Germany.Willinger, et al, “Self-Similarity Through High-Variability: Statistical Analysis of Ethernet LAN Traffic at Source Level”, IEEE/ACM Transactions on Networking, Vol.. 5, No. 1, 1997

Utilization degradation in packet-switch networks

2 ports

Infinite number of ports

0

0,1

0,2

0,3

0,4

0,5

0,6

0,7

0,8

0,9

1

1 2 3 4 6 8 10 12 14 16

Hops

Uti

liza

tio

n


Enhancing existing infrastructure

IPIP

+Cost efficient production of best effort services Highly flexibleWidely supported de-facto standard

+Very reliable and robust bulk transportGood timing characteristics

-Not very suitable for real time sensitive data (video)100% QoS does not work when prioritized traffic dominatesPrioritization requires intensive and costly traffic engineering

-Low granularity, unsuitable for most end user needsOften low utilization due to bulky capacity stepsStatic configurations with low flexibility

SDH / SONETSDH / SONET

Current situation- Significant investments in IP and

SDH/Sonet platforms



+Very reliable and robust bulk transportGood time characteristics

IPIP

+Fully protected channels are ideal for real time sensitive data (video)100% QoS is guaranteed even at full network loadPrioritization by channelization is easy to set up and manage


TDM based channelization with high granularity and flexibilityTDM based channelization with high granularity and flexibility


Adding service-adapted TDM channelization

eliminates previous limitations





IPIP





And these limitationsbecome insignificant





IPIP





Enable new services to existing customers- 100% QoS VPN, bandwidth on demand, streaming

video etc





IPIP

+Fully protected channels are ideal for real time sensitive data (video)100% QoS is guaranteed even at full network loadPrioritization by channelisation is easy to set up and manage




Also enabling new media services- utilize existing media interfaces

SDI / ASI SDI / ASI



Channelization of bandwidth

DTM channel A - ISP 1

DTM channel B - ISP 2(best effort)

DTM channel C - PTT 1

IP IP IP

IPIPIPIP

IPIP

IP IP IP IP

Contribution Video

Data(shared channel)

Voice

TV distribution(multicast)

4-6 Mbps MPEG

4-6 Mbps MPEG

Fiber or

4-6 Mbps MPEG

4-6 Mbps MPEG


GMPLS Objectives

• MPLS objectives

• Traffic engineering

• VPN possibilities

• GMPLS additions - including TDM, WDM and fiber

• On-demand service provisioning

• Resource reservation

• QoS guarantees

• Multicast

• Topology independence - Ring & Mesh


Next generation optical networking

• IP is already the general purpose service interface

• Ethernet is the datacom interface

• SDI, ASI and Gigabit Ethernet will be the media interfaces

• Sonet/SDH is the legacy transport technology for fiber based networks DWDM transport

• GMPLS for signalling interoperability

• GMPLS-aware TDM based resource reservation enable 100% QoS, provisioning, multicast and SLA (billing) support for both streaming and datacom services.

Ethernet / IPEthernet / IP

Sonet / SDHSonet / SDH

TDM based channelization TDM based channelization

Fiber / DWDMFiber / DWDM

ApplicationsApplications

PDHPDH SDI / ASISDI / ASIG

M

P

L

S

G

M

P

L

S


A non-hierarchical structure for sending data

Dynamic synchronous Transfer Mode• One-way channels (n*512 kbps “steps” up to

link speed)

• 64 bits in a slot, approximately 4500 slots/frame

• 8000 frames/s• Control channels / Data channels

STM16/OC48link rate

125 s frames

64 bit time slots


DTM channels

• Unidirectional, from sender to receiver• Multirate, from 512 kbps to link speed• Multicast, from one sender to many

receivers• Guaranteed service

• Unidirectional, from sender to receiver• Multirate, from 512 kbps to link speed• Multicast, from one sender to many

receivers• Guaranteed service

Control channel

1 Mbps channel

2 Mbps channel

4.5 Mbps channel


• Topologies

Ring

Dual ring

Point-to-point

Dual bus

any mix

• Topologies

Ring

Dual ring

Point-to-point

Dual bus

any mix X

X X

Scalability - Topology independentBuilt-in topology discovery


Reliable Services - Restoration

X

X X

• Automatic failure discovery• Automatic restoration• Prioritised channels are set-up first• Crank-back function

X

X

X

X


Scalability - Automatic synchronisation

• Plug and play• Automatically builds

a minimal spanning tree from active reference clock to all nodes

• Automatically handles clock, node or link failures

• Maintain frequency and phase continuity during transient states

• Plug and play• Automatically builds

a minimal spanning tree from active reference clock to all nodes

• Automatically handles clock, node or link failures

• Maintain frequency and phase continuity during transient states

0

1


Nimbra One – Multiservice platform

“[CBC] explored the technology from the point of view

of quality of service, whether it could merge all traffic –

video, audio, radio and voice and data – into the same

pipe. The test was successful”

Anthony Caruso, Director of Technology and systems, CBC/Radio-Canada.

Network World Canada, August 22, 2003


Contact

Erling Hedkvist

[email protected]

converged media networks

Documents