1. Bringing Mobile Connectivity to Remote Communities A Transmission & Power Efficient Solution

2. 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 2

3. The OPEX Barriers for Remote Community Expansion
Source: Supplied to Altobridge by African GSM Operator

4. Solving the Transmission Cost Challenge…
Split Architecture™
Local Connectivity™
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
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 4

5. Solving the Power Efficiency Challenge…
Case Study: A 2TRX Remote 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

6. The Issue of Unused Capacity

7. Should Remote Sites not be 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 ?

8. The 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

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

10. Power Saving Attributes
Non optimised 2 TRX Altobridge Site:
195 watts
4.680kwh per day
Power Optimised AltoPOD 2TRX Site:
6 Watts
12 hours at 130 Watts
6 hours at 145 Watts
= 3.09kwh per day
Estimated Saving from Intelligent Power Management =34%

11. AltoPOD Summary Transmission Power O&M O&M Environmental Environmental
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
Split BSC
B/W Optimisation over satellite
Local Switching
Reduced B/W requirement as local calls are switched locally
Power
Transmission
O&M
Remote GSM Modem in Altopod
Battery Charge Telemetry
O&M
O&M
Green BTS
Solar Powered BTS
Environmental
Environmental

12. Thank You
Peter Tuomey