Bringing Mobile Connectivity

toRemote Communities

A Transmission & Power Efficient Solution

What we do…What we do…• We develop innovative software

technologies to enable GSM operators to cost effectively extend their networks to small, remote communities.

Our target markets have…

• A subscriber potential of up to 1,000

• Where satellite is the only realistic backhaul solution

• Where the power source is inevitably off-grid

• Our specialism is satellite bandwidth optimisation and power efficiency - the main Opex barriers which have limited MNO expansion to remote territories to date

The OPEX Barriers for Remote The OPEX Barriers for Remote Community ExpansionCommunity Expansion

Source: Supplied to Altobridge by African GSM Operator

• Bandwidth On-Demand means no expensive ‘always-on’ requirement.

• No revenue generating traffic = No bandwidth used

• Bandwidth Optimisation means 5-8kbit/s per call or 35-56kbit/s per TRX

• Ringtone Suppression – not allocating the audio path over satellite until the MO Call is answered – provides a further 25% bandwidth saving

Solving the Transmission Cost Solving the Transmission Cost Challenge…Challenge…

• Local Calls are Switched at BTS level

• Voice Traffic is not backhauled

• Only signalling traffic is carried over satellite

• Local Call Traffic can account for up to 60% of total call traffic a Remote Sites

Split Architecture™ Local Connectivity™

Solving the Power Solving the Power Efficiency Challenge…Efficiency Challenge…

Case Study: A 2TRX Remote Case Study: A 2TRX Remote Site Deployment in SE Asia Site Deployment in SE Asia

Site Profile:• A Remote Enterprise with

230 active subscribers

• 5km coverage radius

• Average Traffic per Day ~ 40 Erlang, BH Traffic ~5 Erlang

• Power Consumption: 195watts

• Total Power Consumption per day 4.680kWh

• Power Source: Diesel generator

The Issue of Unused CapacityThe Issue of Unused Capacity

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MAX Available Capacity 2 TRX (2% BLK) 1TRX (2% BLK)

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Unused Capacity

Should Remote Sites not be Should Remote Sites not be Dimensioned Differently ?Dimensioned Differently ?

The Traditional Macro Network Approach:• Dimension for the Busy Hour• Add extra TRX capacity when TCH

Blocking SLAs are reached

But…..• Additional TRX demand additional power

So…• Should the convention also be the norm for

remote sites where power is a scarce and expensive resource and where at times of day, capacity greatly exceeds demand ie. at times of low or zero traffic ?

The Ideal ScenarioThe Ideal Scenario

• Idle the 2nd TRX at low traffic periods

• Put the 2nd TRX & VSAT Modem into low power mode at very low or zero traffic levels

• Low Opex, Low powered 2 TRX BTS

• Dual PA: 10 Watts per TRX

• Power consumption: 195 watts

• Passive Cooling, Outdoor Unit

• GPRS, EDGE and AMR Half Rate Supported

• Optimised for satellite backhaul

The AltoPOD™.… An Intelligent The AltoPOD™.… An Intelligent Power Management SolutionPower Management Solution

• Non optimised 2 TRX Altobridge Site:• 195 watts• 4.680kwh per day

• Power Optimised AltoPOD 2TRX Site:• 6 hours @110 Watts• 12 hours at 130 Watts• 6 hours at 145 Watts

= 3.09kwh per day• Estimated Saving from Intelligent Power

Management =34%

Power Saving AttributesPower Saving Attributes

AltoPOD SummaryAltoPOD Summary

• Split BSC • B/W Optimisation over satellite

• Local Switching• Reduced B/W requirement as local

calls are switched locally

Transmission

• Lower Power BTS• Lower Power consumption BTS

• Intelligent Power Management• Intelligent Power Amplifier

Management• Increase power per TCH• Place VSAT in low power mode in

low traffic (0 Idle Traffic)• Traffic Handling to minmise 2nd TRX

usage• Power Monitoring & Adaptation

• Unique Monitoring of Power Supply• Allow optimal dimensioning of solar

system• Physical

• BTS located close to Antenna to minimise feeder loss

• Passive Cooling

Power

O&M

Environmental

• O&M • Remote GSM Modem in Altopod• Battery Charge Telemetry

O&M

• Green BTS• Solar Powered BTS

Environmental

Thank You

Peter Tuomeyptuomey@altobridge.comwww.altobridge.com