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

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 99.999%. 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.

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

Super-Cell D/S RF Requirements RF Downstream Typical coverage; 10 - 30 Miles Usually tall broadcast towers; 300 - 800 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 99.999%. 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 2500 - 2686MHz

Super-Cell U/S RF Requirements RF Upstream Typical coverage; 10 - 30 Miles Usually tall broadcast towers; 300 - 800 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 99.999%. 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

Super-cell Base Station RF

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 99.999%. 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.

MMDS Spectrum Requirements WCS low WCS high 2305 - 2320 and 2345-2360 MHz H1 H3 H2 B1 B4 B3 B2 D1 D4 D3 D2 F1 F4 F3 F2 2500 - 2686 MHz C1 C4 C3 C2 E1 E4 E3 E2 G1 G4 G3 G2 A1 A4 A3 A2 M1 M2 2150 - 2162 or 2170-2182 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 2500 - 2686 MHz

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

Multi-Cell Architecture B 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

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 99.999%. 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.

Axity Multi-cell Base Transceiver Station

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

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 99.999%. 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.

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 99.999%. 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.

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

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)

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

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

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

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

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.