Demand for bandwidth: And its relationship with the network

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Demand for bandwidthAnd its relationship with
the network

• Yee Soon
• Technical Consulting and Systems Engineering
• Tellabs

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Bandwidth Definition by Wikipedia
Bandwidth is a measure of frequency range and is
typically measured in hertz. Bandwidth is a
central concept in many fields, including
information theory, radio communications, signal
processing, and spectroscopy. Bandwidth is
related to channel capacity for information
transmission and often the two can be confused.
In particular, in common usage "bandwidth" also
refers to data (information) transmission rates
when communicating over certain media or devices.
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Bandwidth efficiency in Web Browsing

• 200KByte Wiki web page downloaded in 5 sec
  320Kbps perceived download rate
• But
• URL resolution with DNS and transmission delay to
  reach the site
• HTTP TCP session establishment delay
• PC HW processing delay, OS processing delay,
  Application processing delay
• Total delay 2 sec
• Effective download time 3 sec, resulting in
  effective download rate 533Kbps
• In Australia, majority broadband traffic web
  browsing
• Majority web browsing half the time spent on
  delay, the other half retrieving content 200KB

Tested on HP Pavillion, Windows Vista, Intel
Core 2 T7200 _at_2GHz, 1G RAM, 8Mbps ADSL2
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Bandwidth Efficiency in Web Browsing
True broadband ? web browsing only application !

• Assumption
• No network congestion
• Software processing, routing, propagation delay
  kept constant

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Agenda

• Infrastructure readiness customers
• Bandwidth and Content Matrix
• Bandwidth impact on various parts of network
• Findings and Summary

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Broadband Ready?
True Broadband Ready All parties ready
End Users
Content
Infrastructure
Must be Ready 1st !
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Infrastructure Readiness and Customers
Infrastructure Readiness
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Bandwidth Content Matrix
SD-TV Local Content download
Foreign Content download
Gaming
HD-TV Local Content Download
Local Content download
P2P Content sharing
Browsing, IM, VPN, VoIP, Video calls
Internet content download, SD-IPTV, Gaming
HD-IPTV, Local Media content download
Peer2Peer Content sharing, Local Media content
download
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Bandwidth Content Analysis

• Media content download when will local media
  content be widely available?
• Is it ready when infrastructure is ready?
• Is it ready when users demand it?
• Will users demand it if current broadband
  experience is average?
• Offering SD-TV but not offering HD-TV?
• Would content sharing be legalised for
  Peer-to-Peer?

IPTV and Local Media Content Download drives
bandwidth demand
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Bandwidth demands on Network

• Demand for higher network bandwidth from
• Increasing bandwidth per user
• Scaling the number of users
• Combination of both

Presents different requirements on network
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Bandwidth demands on Network

• Physical transmission infrastructure
• Service network
• Edge and Core network
• Inter-provider trunks
• Access Network

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Service Network

• Capacity and performance upgrade on user AAA and
  security
• PPPoE, DHCP, DNS, CA, EPG, DPI, IDS/IPS
  performance
• Peer-to-peer application and flow
  inspection/sampling
• Distributed architecture for AAA and security
• Content attachment point, content caching point
• Bandwidth upgrade to the content locations is
  required in all centralised content models
• Distributed local content
• Impact of scaling
• Sensitive to number of sessions, states and
  connections

Demand for bandwidth drives capacity and
performance upgrade here
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Core and Edge network

• All traffic must traverse the edge and core
  network
• Efficient use of edge and core bandwidth
• Traffic engineering hub-spoke and
  Point-to-Point
• Service differentiation
• Careful placement of AAA and content in the
  network
• Impact of scaling
• Sensitive to both capacity and connection spaces

Demand for bandwidth drives Capacity and
performance upgrade here
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Inter-provider infrastructure upgrade

• In Australia
• Dominated by foreign content
• Lack of local content
• International bandwidth is obvious bottleneck
• Extensive caching of foreign content
• Impact of scaling
• Sensitive to bandwidth capacity demand

Must encourage Local Content to boost true
broadband usage Demand for bandwidth drives
significant inter-provider upgrade
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Access Bandwidth Upgrade
Copper Access
Fibre Access
Browsing, IM, VPN, VoIP, Video calls
HD-IPTV, Local media content
Internet download, SD-IPTV, Gaming
Media content download/sharing
HD-IPTV, Local Media content download
Peer2Peer Content sharing, local media content
download
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Access networks upgrade dependent on

• Content type offered
• Local content
• Geographical reach
• Regulation on peer-to-peer sharing
• Strategic investment
• Fast access to content
• Fast service turn on
• Competitive strategies
• Little effect on scaling end-points/subscribers

Infrastructure readiness
Most business case sensitive Differentiator -
Infrastructure readiness
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What about Business Bandwidth?

• Point-to-Point
• ATM/Frame Relay migration ? Ethernet
• Do businesses know what to do with the sudden
  increase of bandwidth?
• Security new multimedia application trade off
• Point-to-Multipoint
• Existing IP-VPN customers
• No major killer app push for significant increase
  in bandwidth
• Introduction of Metro-Ethernet VPLS, marketing
  positioning of lower cost higher bandwidth
  product?
• Heavily promote low cost storage solutions and
  applications

Observation incremental bandwidth upgrade,
Storage solutions may push higher demand
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Findings and Summary

• Infrastructure readiness ? Customer stickiness,
  more revenue per customer, increase customer base
• True broadband applications IPTV (SD/HD), Local
  and P2P Media Content
• Demand for Bandwidth ? capacity and performance
  upgrade
• Transmission infrastructure
• Service network
• Edge and Core routing infrastructure
• Inter-provider infrastructure
• Access network infrastructure may require upgrade
• From copper to fibre
• Application, competitive strategies, commercial
  dependencies
• Infrastructure readiness differentiator
• Business bandwidth contribution is dwarfed by
  mass residential bandwidth

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Tellabs broadband technology is available today,
preparing Australian networks for the demand on
bandwidth
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Thank you