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Broadband World Forum 2011 - John Yeomans - First Capital - Balanacing OnNet backhaul
Citation preview
1
John Yeomans
Director, FirstCapital
Director, SharedBand
+44 7870 655647
www.firstcapital.co.uk
www.sharedband.com
Balancing OnNet backhaul with
OffNet WiFi DSL
The future of cellular with WiFi
2
Introduction
John Yeomans, FIET
telecom strategy and technology finance background
Director, Sharedband
access management software
bonded DSL leader
applications extend to 3G and WiFi
Director, Worksnug
social network to help mobile workers access wifi
Director, FirstCapital
financial adviser to European technology businesses
combine industry and financial knowledge
3
What everyone is saying
1. Backhaul
As big a bottleneck as spectrum
Carrier Ethernet, in various forms, is the ubiquitous solution
2. WiFi Offload
Do it more, but it’s still only a small minority of traffic
Don’t allow voice to ‘leak out’
Generally winning over femtocells, because of ubiquity/market position
Debate between tight and loose coupling with mobile network
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What this paper is going to say
1. Backhaul
Agreed, backhaul is congested, but make life easier with more
wifi offload to alleviate suburban/urban congestion….
and in the process change the choices of backhaul architecture
and technology
2. WiFi Offload
Plan for it a lot more still: target 80% plus of traffic by 2014
VOIP over wifi is inevitable and desirable – plan for it, and encourage it
Loose coupling initially is the way….but it will migrate to a
new more tightly coupled architecture
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Typical urban/suburban cellular infrastructure : base stations in Blue
Population 60,000(for full town: 120,000)
Area c. 4 x 4 km, hilly
Households 25,000
Operators 4/5
Base stations c. 60(T Mobile and Orange not up to date)
Broadbands c 20,000
Sites c. 35
Places needing extremely
high capacity, resilient
cover 1
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As you move to smartphones, data dominates usage
My own usage per month
300 texts = <1 Mbyte
300 voice mins = 30 Mbyte
300 Mbytes data = 300 MByte
So adding data typically means 10x the level of bit carriage
My package costs less than 1.3x a voice only package
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The effect of 20 x data growth (about 5 years by most forecasts)
Option 1: No new focus on wifi offload Say 10% of traffic is offloaded
Sites Constrained by planning Maybe 2-4 x numbers, at most
Already sub 1km distances
Backhaul c. 10 x capacity per cell site More sites and more capacity
Shift to Gig-E and fibre but favours wireless relay to core,
many technology options existing nodes as access points
Option 2: Heavy focus on wifi offload 50% + of traffic offloaded
Now only coping with 10x traffic growth for cellular network.
Wireless mesh/access point architecture less strongly favoured.
Massive savings.
8
Is 50% to 80% wifi offload realistic or desirable?
Realistic Absolutely
Personally 70% Netcounter statistics over 6 months, now
See also Mobile Data Offload: How much can wifi deliver April 2011, CoNext which
estimated 65% is offloadable now & John Yeomans paper, Service And Pricing Strategy
For Mobile Operators Long Term Survival, March 2011, Informa Mobile Broadband
Conference, Amsterdam
Desirable Yes, too
Users Prefer it. Far higher bit rates. More reliable.
Economics Strongly favours it
Operators Loss of control? Loss of revenue?
‘Unmanaged’ service? Or a foundation for profits?
2.5GByte 1GByte
WiFi Cellular
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The connection, control and management problem
1. Is there a problem? Why do operators want on-net?
2. Rely on the device rather than just the network for management
Software in Smartphones : a monitoring app. with usage data sent to operator
3. Use the (mobile) IP protocol and modify the data network architecture
From: To:
On-net
Off-net
Voice
Data
mobile
fixed
Voice
Data
Access CoreOperator’s managed
core network – use
IP routing to bring
data back on-net
…if you need to
Public internet
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What’s the next stage? It’s as easy as A B C (access, backhaul, core)
More intelligence in the device to manage routing: cellular versus WiFi
currently there is no handoff: arguably unnecessary for data
But as streaming traffic over smartphones grows, handoff becomes essential
data streaming, video streaming & voice
Architecture now a logical wireless access, backhaul, and core network structure
fixed
Access Backhaul Core ABC
Operator’s managed core
network – managed data,
video and voice streaming
Public internet
Wireless access
mobile
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Can a Smartphone manage this level of IP complexity?
Yes, easily
The handoff decision (wifi / cellular) is placed in the handset, as now
Joining the packets from different transmission routes back together is a
managed service performed in the core network
Managing seamless handover between cellular and wifi is the
same problem as bonding DSL lines properly
Joining together and break apart streams of packets over different lines or routes
Compensating for delay, jitter, speed variation and other changes in transmission
parameters over time
SharedBand does this now, and is working with tier 1 international carriers
12
Reality check
Does this matter and is it right? YES
With acknowledgement to Adam Gryzbicki, ATT Oregon, Paper on Mobile Broadband Technology Path, Nov 2010
and to Zanran.com for making graphical information so easy to find
13
Commercial impacts
Option 1: Batten down the hatches
Disallow VOIP / streaming on handsets
Maximise on-net traffic
….and watch your cost structure go up FAST
over 5 years and your user base migrate to
advanced VOIP, with its presence and other
services functionally better than cellular
Option 2: Open it all up
Create a mobile solution that uses the most
economic access method (cellular or wifi)
Offload 70% of mobile data by 2015
Manage the connections from the Smartphones
Into the network, for reliable streaming
services and management of network handoff
….danger of some short term revenue loss
….but also some big 2-3 year capex savings
….and the opportunity to retain voice and
data traffic later rather than see it
migrate
14
Conclusion
WiFi offload strategy forms an integral part of backhaul planning
It leads towards a different vision of a mobile network
Use the best access network (WiFi when available, usually)
but provide the best coverage too (cellular)
The handset as the first place to manage handoff, not the base station
with intelligent access/routing software, linked to the core network
Core managed network services
protecting voice, and building new streaming and managed service revenues
managing access integrity, over cellular and wifi
Thank you