1. RF Deployment Strategies for MMDS Dale Dalesio; Product Manager ADC The Broadband Company

2. Agenda Super-Cells Multi-Cells
The automatic backup system enhances system availability by replacing a failed primary transmitter with a frequency agile backup. Actual field data shows that MMDS transmitters are very reliable with an MTBF of over 10 years. But, automatic backup can improve the system availability by several orders of magnitude and get us to numbers like %.
Functionally, the ABS system includes an on-site embedded controller which monitors the primary transmitters and enables a frequency agile backup in the event of a failure. The controller sets the channel frequency, IF input, and RF output of the agile within 5 seconds of a failure.

3. Super-Cell Architecture
A,B
Super-Cell
Enables fastest market entry
Lowest cost
Backhaul component small
Broad coverage
Low to medium capacity
Limited ability to target coverage and service set offering
Downstream A B A B A B A B C
Upstream
10 to 25 miles radius

4. Super-Cell D/S RF Requirements
RF Downstream
Typical coverage; Miles
Usually tall broadcast towers; feet
Integrated with existing video service
Mostly single sector D/S
Higher output power per channel
Typical transmitters are 50W or 100W Channel
One transmitter per RF channel
Waveguide combining technique
The automatic backup system enhances system availability by replacing a failed primary transmitter with a frequency agile backup. Actual field data shows that MMDS transmitters are very reliable with an MTBF of over 10 years. But, automatic backup can improve the system availability by several orders of magnitude and get us to numbers like %.
Functionally, the ABS system includes an on-site embedded controller which monitors the primary transmitters and enables a frequency agile backup in the event of a failure. The controller sets the channel frequency, IF input, and RF output of the agile within 5 seconds of a failure.
Downstream Frequencies
MMDS MHz

5. Super-Cell U/S RF Requirements
RF Upstream
Typical coverage; Miles
Usually tall broadcast towers; feet
Use of tower-top LNAs (low noise amplifier) to overcome RF coaxial loss
One per each sector
Sectorized on the Upstream
4 sectors; 90º antennas
8 sectors; 45º antennas
Frequency re-use
The automatic backup system enhances system availability by replacing a failed primary transmitter with a frequency agile backup. Actual field data shows that MMDS transmitters are very reliable with an MTBF of over 10 years. But, automatic backup can improve the system availability by several orders of magnitude and get us to numbers like %.
Functionally, the ABS system includes an on-site embedded controller which monitors the primary transmitters and enables a frequency agile backup in the event of a failure. The controller sets the channel frequency, IF input, and RF output of the agile within 5 seconds of a failure.
Upstream Frequencies
MDS1
MDS2A
MDS2
WCS
Limited MMDS

6. Super-cell Base Station RF

7. Super-Cell RF Facilities Requirements
Usually housed in a building or transmission shelter
Larger space required if integrated with existing video service
The automatic backup system enhances system availability by replacing a failed primary transmitter with a frequency agile backup. Actual field data shows that MMDS transmitters are very reliable with an MTBF of over 10 years. But, automatic backup can improve the system availability by several orders of magnitude and get us to numbers like %.
Functionally, the ABS system includes an on-site embedded controller which monitors the primary transmitters and enables a frequency agile backup in the event of a failure. The controller sets the channel frequency, IF input, and RF output of the agile within 5 seconds of a failure.

8. MMDS Spectrum Requirements
WCS low
WCS high
and
MHz H1 H3 H2 B1 B4 B3 B2 D1 D4 D3 D2 F1 F4 F3 F2
MHz C1 C4 C3 C2 E1 E4 E3 E2 G1 G4 G3 G2 A1 A4 A3 A2 M1 M2 or
MHz
MDS U/S A1 A4 A3 A2 B1 B4 B3 B2 D1 D4 D3 D2 C1 C4 C3 C2 E1 F1 F4 F3 F2 E4 E3 E2 H1 H3 H2 G1 G4 G3 G2
MMDS U/S
MHz

9. Mix Cell Sizes to Maximize Flexibility*
1. Initial Super-cell
Gain quick market entry
STRATEGY: Enter market with super-cell, add mini-cells over time, may result in complete migration in some markets
3. Complete Migration * *
2. Multi-cell Overlay
New frequencies
Capacity/coverage “hot spot” fill

10. Multi-Cell ArchitectureB C D A B
Multi-Cell Strategy
Incrementally add targeted capacity, or market entry in high-density areas
Use of buildings, broadcast, and wireless tower sites
Medium coverage
Medium to high capacity
Relatively fast to deploy D C B A D C
Upstream & Downstream
3 - 7 miles radius
Multiple modulations address intra- and inter-cellular interference

11. What’s needed for Multi-Cell RF Systems
Reduce capital cost of RF
Scaleable Multi-sector cell support
Use the bandwidth
Smaller size for hub equipment
Quick and efficient hub deployments
Less customization; standard repeatable hub configurations
Improved efficiency
Very low maintenance and downtime
The automatic backup system enhances system availability by replacing a failed primary transmitter with a frequency agile backup. Actual field data shows that MMDS transmitters are very reliable with an MTBF of over 10 years. But, automatic backup can improve the system availability by several orders of magnitude and get us to numbers like %.
Functionally, the ABS system includes an on-site embedded controller which monitors the primary transmitters and enables a frequency agile backup in the event of a failure. The controller sets the channel frequency, IF input, and RF output of the agile within 5 seconds of a failure.

12. Axity Multi-cell Base Transceiver Station

13. D/S (IF to RF) & U/S (RF to IF)
Axity BTS
Axity BTS
D/S (IF to RF) & U/S (RF to IF)
Broadband Design; supports single channel or multi-channel signals.
Modulation independent
supports QPSK, 16QAM; 64QAM; OFDM
Each chassis supports up to 4 sectors with redundancy; additional sectors supported with optional configurations
Independently scalable upstream or downstream configurations

14. Integrated BTS
Complete modular integration
Downstream components
RF transmission; MMDS upconversion, amplifier, output filter
Upstream components
RF reception; LNA, MMDS receive and down-conversion
Other network equipment
Frequency reference standard; GPS; ABS controller; Input and output switch matrices
The automatic backup system enhances system availability by replacing a failed primary transmitter with a frequency agile backup. Actual field data shows that MMDS transmitters are very reliable with an MTBF of over 10 years. But, automatic backup can improve the system availability by several orders of magnitude and get us to numbers like %.
Functionally, the ABS system includes an on-site embedded controller which monitors the primary transmitters and enables a frequency agile backup in the event of a failure. The controller sets the channel frequency, IF input, and RF output of the agile within 5 seconds of a failure.

15. Axity Deployment Configurations
Co-locate with access equipment
Indoor or outdoor configurations
RF remotely located from access equipment
Ideal for RF roof-top installations with access equipment
The automatic backup system enhances system availability by replacing a failed primary transmitter with a frequency agile backup. Actual field data shows that MMDS transmitters are very reliable with an MTBF of over 10 years. But, automatic backup can improve the system availability by several orders of magnitude and get us to numbers like %.
Functionally, the ABS system includes an on-site embedded controller which monitors the primary transmitters and enables a frequency agile backup in the event of a failure. The controller sets the channel frequency, IF input, and RF output of the agile within 5 seconds of a failure.

16. BTS Configurations RF Co-located
PSTN
Wireless Hub
Axity RF BTS
Wireless Modem Termination System (WMTS)
Private IP
Internet
B/W Manager
VoIP G’way
TX & RX
Antennas

17. BTS Configurations RF located remotely
Axity RF BTS
TX & RX
Antennas
PSTN
Wireless Hub
VoIP G’way
IF Transport
Private IP
RF remotely located from access equipment
If multiplexed and transported to RF BTS
B/W Manager
Internet
Wireless Modem Termination System (WMTS)

18. Axity Multi-cell Base Transceiver Station
Axity BTS
Available now
N+1 Redundancy; downstream and upstream
10W average per sector - multi-carrier
25W average per sector - single carrier
SNMP interface
Internal 10MHz reference and GPS
Indoor or outdoor configurations
Hot swappable and replaceable modules
Frequencies Supported
MMDS D/S
MDS U/S

19. Frequencies Supported
RF BTS; What is Coming
Axity BTS
Mid 2001
20W average - multi-carrier
50W average - single carrier
Programmable downstream output power in eight 2dB steps
Programmable upstream gain of downconverter in eight 2dB steps
-48V configuration w/integrated battery backup
Single CAM replaces individual Control boards
Enhanced monitoring, control and status
Frequencies Supported
D/S MMDS
U/S MDS, WCS, MMDS

20. Automatic Backup Controller
Redundancy
IF Input
RF Output
MMDS
RF Output
D/S
RF Transfer Switches
D/S Sector
O/P Filter
Under normal conditions IF input goes into the primary transmitters, gets upconverted, and then the RF output is sent to a channel combiner and on to a transmit antenna. In the event of a failure, the primary transmitter is disabled, and it’s IF is switched to a frequency agile backup transmitter. The controller enables the agile to the correct RF channel frequency, and switches the channel combiner. The combiner filter of the failed channel is closed and the agile’s RF output is fed into the wide band input of the combiner.
The ABS controller has programmable channel priorities so you can define which channel to backup in the event that two primary transmitters go down at the same time.
The agile transmitter is also programmable. It has a menu driven display and keypad so it is very easy to select a channel for manual backup.
The entire system is designed for use with either analog or digital modulation. The system is scaleable in terms of the backup ratio. For example, you can have one agile per 16 channels or one per 31 channels.
Status/ Control
Automatic Backup Controller
Control/ Status
Downstream RF
Control
Comm
D/S Input IF Switch
Auxiliary Sector
IF Input
RF Output

21. Multi-Cell vs. Super-Cell
Axity BTS Reduces:
Size by 50%
Power Consumption by 40%

22. Multi-cell Base Transceiver Station
Multi-cell architecture can:
Reduce capital RF hub costs by 50%
Reduce space requirements by 50%
Reduce Power Consumption by 40%
Increase capacity through more efficient use of the MMDS bandwidth.