CD Melbourne Congress: Challenge Networks' Simon Lardner
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Transcript of CD Melbourne Congress: Challenge Networks' Simon Lardner
…..specialist telecommunications solutions provider
Kiribati – Case study of connecting the un-connectible
Simon Lardner
…..specialist telecommunications solutions provider
Background to Challenge Networks• A systems integrator that specifically
builds ‘Telecom networks’– PSTN, data & mobile
• Has partnerships with several Tier 1 telecoms vendors.
• Focuses on smaller networks (less then 1-2 million Subscribers).
• Has built ‘turn key’ networks in more than 15 countries around the world.
• Experienced in rugged and remote locations.
…..specialist telecommunications solutions provider
Kiribati Islands ?
…..specialist telecommunications solutions provider
Kiribati Islands
• 100k people with 32 islands
• Main island of Tarawa has 30k people
• 2nd largest island Kiritimati (Christmas) with 12k
• 60% of population live on 20 other inhabited islands with populations 500-6k people
…..specialist telecommunications solutions provider
…..specialist telecommunications solutions provider
…..specialist telecommunications solutions provider
Assumptions of traditional mobile Architecture
High population & high population density
Wealthy population
Good, cheap, high quality backhaul
Lots of locations for Interconnect & content
exchange
Electrical power is easy to get at end points
Mountains to put sites on
Traffic load relatively stable & known locations
…..specialist telecommunications solutions provider
Problems with a Kiribati mobile network..
Almost none of the requirements for a traditional mobile network apply……
Satellite only international backhaul Low ARPU Flat terrain Vendors have tried in the past with traditional
mobile architecture and have been a spectacular failure……….
…..specialist telecommunications solutions provider
Continuum of markets fitting the traditional mobile model
EuropeanCommercial
operator
USA Commercial
operator
Kiribati
‘Perfect’ ‘Terrible’
PNG commercial
operator
AustralianCommercial
operator
Public safety mobile
network
…..specialist telecommunications solutions provider
CN Design Aims• Economically rollout 3G to all 22 islands• Network performance equal on all islands• Co-locate with LTE where appropriate• Maximum of 1 satellite hop for 95% of voice
traffic case and 100% of data.• Reduce OPEX such operator can offer cheapest
telecommunications service in Pacific Islands• 10+ year life cycle
…..specialist telecommunications solutions provider
Traditional Mobile architecture
BSC/RNC
Layer 1(Base Station)
Layer 2(Controller)
Layer 3(Core Network)
BTSBTS
BTS
BTSBTS
BTS
GGSNSGSN
HLR
MGw
MSC
Traditional Carrier Network
All traffic traverses core
single control point
…..specialist telecommunications solutions provider
12
Kiribati Mobile Architecture
Distributed “Flat” Architecture – Intelligence at the network edge
HLR/VLRSMSCSGSNMSCBSCBTS
HLR/VLRSMSCSGSNMSCBSCBTS
HLR/VLRSMSCSGSNMSCBSCBTS
IP Cloud
Distributed SolutionDistributed Network Solution
•Every base station site has a complete core – billing, EPC, IMS, etc
•Scales down to a single BTS
• Able to provide high reliability at a BTS level
• Mesh architecture
•Enables some quite clever network solutions
…..specialist telecommunications solutions provider
Example – traditional network
Other Remote islands
Tarawa
International Interconnect
Xmas Island
Double satellite hop (terrible call quality)
Core network
Satellite capacity used (huge cost)Unreliable (satellite link critical)
Local call on remote island
…..specialist telecommunications solutions provider
Example – traditional network
Other Remote islands
Tarawa
International Interconnect
Xmas Island
Core network
TarawaDouble satellite hop (terrible quality)2 x optimal Satellite capacity used (cost) Unreliable (2 x satellite links)
International call/data
…..specialist telecommunications solutions provider
New Distributed architecture
Other Remote islands
Xmas Island
Tarawa
Go back to what we cannot change – where islands are & basic RF requirements
…..specialist telecommunications solutions provider
New Distributed architecture
Other Remote islands
Xmas Island
Tarawa
Remove the centralised core and distribute to each BTS
…..specialist telecommunications solutions provider
New Distributed architecture
Other Remote islands
Xmas Island
Tarawa
International Interconnect
Move the data/voice interconnect to the network centre
…..specialist telecommunications solutions provider
New Distributed architecture
Other Remote islands
Xmas Island
Tarawa
International Interconnect
No satellite hop (quality improvement)
Local call
No satellite hop (cost saving)No satellite hop (reliability)
…..specialist telecommunications solutions provider
New Distributed architecture
Other Remote islands
Xmas Island
Tarawa
International Interconnect
Single satellite hop (quality improvement)Single satellite hop (cost saving)Single satellite hop (reliability)
International call/data
…..specialist telecommunications solutions provider
Key featuresOnly way of implementing LTE eNodeB over
satelliteReduction in required satellite bandwidth makes
overall solution economically viable.Enables ‘clever stuff’
Advanced local data cachingLocal switchingHigher reliabilityOptimised routing
Saves lives and changes societyNot the solution for every application
…..specialist telecommunications solutions provider
Takeaways With a modest investment & some ingenuity Kiribati have created what is perhaps one of the most advanced mobile network in the world. Traditional technology approaches are often completely wrong Some insight into what is likely to be part of ‘5G’. Potentially great for ‘non traditional’ applications – Public safety, rural coverage, etc.
…..specialist telecommunications solutions provider
…..specialist telecommunications solutions provider