Atdi Last Mile Fiji Workshop 25-26-07-05 Web
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Transcript of Atdi Last Mile Fiji Workshop 25-26-07-05 Web
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Radio-planning as an answerto the last-mile technological and financial issues
Solutions in Radiocommunications
PITA
Service Quality
&
Operationnal
Workshop
25-29 July 2005
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Agenda
Who we are?
Last Mile in context: yesterdays experience as a help totodays needs
What technology to choose?
Wireless last-mile radio-planning
Whats next?
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Last mile in context
Use of the radiowave propagation in order to connect the subscriber atthe last mile of the network : wireless starts when the copper ends !
Cheaper than cable,
Easy to deploy and undeploy
High bit rates (several Mbit/s persubscriber/CPE),
Frequencies used : 2.4 to 40
GigaHz, and lower (from LOS tonLOS solution)
Associated services : VoIP,
broadband internet, multimedia
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Last mile in context
Many technologies for the same goal:
Microwave links WLL (LMDS)
W-MAN (WiFi, WiMAX, WiBRO, Flash-OFDM)
Mobile (3G)
Broadcast (DVB-H, T-DAB, Wi-TV)
Mesh networking
Different technical and commercial maturity UMTS already launched commercially,
Bit rate lower than initial expectations
LMDS faced a major crisis in Europe andNorthern America in the years 2000
FWA-type of WiMAX has just been certified
Studies and tests for DVB-H
MW links requires expensive deployment costs
WiFi is very sensible to interference and distance limited
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Last mile in context
Many questions, few certainty Everybody agrees on the fact that content convergence is
the key for future applications
Ideally, the use of one or another technology should betransparent for the customer
Different actors profile, different expectations
Established operators:
- complement to white areas where DSL is not already available
(rural areas)
- wireless alternative to DSL to face the increasing Bit Rate demand
for Residential and SoHo areas
Alternative operators:
- offering a wireless solution to the standard access to the
subscriber (optical fiber, cable, dedicated line, non-modifiableinstallation)
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Last mile in context : Competing orcomplementing wireless technologies ?
What is the best technology?
Segmentation of the Market according to
customers precise expectation
According to the targeted market one technology or acombination of solutions will better fit the needs
Whatever the solutions, the technologies will co-exist
Building and proving a business case should rely onBuilding and proving a business case should rely on
deployment hypothesisdeployment hypothesis,, that can be fulfilledthat can be fulfilledby aby a
radioplanning tool suchradioplanning tool suchas ICSas ICStelecom nGtelecom nG
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Cartography in 2D and 3D
ICS telecom-nGmanages 5 cartographic layers that arenecessary for the propagation calculation and display:
Digital elevationmodels
Raster Images
Clutter filesBuilding files
Vector files
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Plannification of the last mileby digital simulation
Dimension the networkaccording to todays needsand tomorrows
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Plannification of the last mileby digital simulation
Located the best positionsin order to place the BS
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Plannification of the last mileby digital simulation
Plannify the parenting of each CPEto their BS, connection per
connection
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Plannification of the last mileby digital simulation
Plannify the parenting of the CPEto their BS, connection per
connection
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Plannification of the last mileby digital simulation
Plannify the parenting of the CPE to their BS,connection per connection
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Plannification of the last mile by digitalsimulation
Simulate the coverage and theresulting interference areaof the network
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Planning of the last mile by digital simulation:anticipating the business figure
Connectable subscribers
PMP
Mesh
30 %
100 %
80 %
50 %
5 10 20 50 100 200 500 1000 2000
Addition of a relaybetween nodes
Subscribers number
%con
nectedsubscribers
Range of revenue depending on
the distribution of the type of
customers
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Last mile : whats next ? (1)
Adaptive modulation
Traffic demand per user: 30 Mbit/s
Connection possibilities due to adaptive modulation
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Last mile : whats next ? (2)
Smart antennas
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Last mile : whats next ? (3)
From the CPE placed on the rooftops or building sides
to Indoor CPEs
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Last mile : whats next ? (4)
From a fixed service
to a nomadic service (withing the same cell)
to a mobile service (handling handover)
OFDM technology takes advantage of the canyon effect
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Conclusion
Simulation can integrate a large amount of input informationSimulation can integrate a large amount of input information(environment, context, users(environment, context, users profiles, technical parametersprofiles, technical parameters))
Possibility to play multiple scenarios, to compare equipmentsPossibility to play multiple scenarios, to compare equipments
(same or different technologies)(same or different technologies)
ICS telecomICS telecomnGnG
providing tangibleproviding tangible
elements for theelements for the
elaboration ofelaboration ofa reliablea reliable
business casebusiness case