In-Building Cellular @ Northwestern University October 28, 2008 Holly King Northwestern University

Requirements Carrier Neutral Full Carrier Participation Agreement Separate from Cell Site Agreements Electronics in Closets No Carrier Recurring Costs to NU Possibility of Incorporating WiFi and 700Mhz

Options (early 2006) Outside Distributed Antenna Didn’t work well for large buildings with low E glass Found limited connections by Carriers Off-Air Distributed Antenna Didn’t scale well Outside Antenna Requirements Base Station Distributed Antenna Closet vs. In Ceiling electronics Positioned for 700Mhz Could add WiFi

Rollout with MobileAccess Phase 1 - 2006 Kellogg School of Management Conference Center Establish Carrier Agreements Carrot with Northwestern providing MA Equipment and Fiber from the Cell Site

Rollout with MobileAccess Phase 2 - 2008 Residence Halls Determined by RF Survey Surveyed 65 Buildings Installed in 7 Buildings Bigger Carrot, Bid for Preferred Carrier for Mobile Communications

Jacobs – Consolidation Head End Englehart Ryan South Ryan North Tech North Tech South ATT – GSM – 9 Sectors MA 330 Fiber Link One per sector T-Mob – GSM – 9 Sectors MA 330 Fiber Link One per sector US Cell - 1 Sector MA 330 Fiber Link One per sector Sprint - 2 Sectors MA 330 Fiber Link One per sector Verizon – 3 Sectors MA 330 Fiber Link One per sector MA 330 Fiber Link 2 per Building MA Base Units Fiber out to remote Hub Units in closets Allen MA 330 Fiber Link 2 per Building MA Base Units Fiber out to remote Hub Units in closets Slivka Jacobs – Consolidation Head End MA 330 Links Per total above MA RIU / BTSC Per Sectorization MA Base Units MA 330 Fiber Link 2 per Building MA Base Units Fiber out to remote Hub Units in closets Fairchild West MA 330 Fiber Link 2 per Building MA Base Units Fiber out to remote Hub Units in closets Bobb McCullough Fiber out to remote Hub Units in closets MA 330 Fiber Link 2 per Building MA 330 Fiber Link 2 per Building MA Base Units Fiber out to remote Hub Units in closets Career Serv MA 330 Fiber Link 2 per Building MA Base Units Fiber out to remote Hub Units in closets Kemper MA 330 Fiber Link 2 per Building MA Base Units Fiber out to remote Hub Units in closets Hinman MA 330 Fiber Link 2 per Building MA Base Units Fiber out to remote Hub Units in closets Fairchild East

Typical Remote Carrier Site CARRIER EQUIPMENT # OF SECTORS DETERMINED BY E-911 REQUIREMENTS AND CAPACITY CALCS ATT – GSM @ 1900 1 PER BLDG SPRINT – iDen and PCS CDMA – 2 Sectors – North and South T-Mobile – GSM @ 1900 1 per BLDG US Cellular – PCS CDMA 1 Sector Verizon Cell and PCS CDMA 3 Sectors Coax Runs (Carrier Provided) MA 330 – Optical Link Quantity varies per location based On 1 link per unique signal / sector (NU Provided) Single Mode Fiber with APC Connectors To Consolidation Head End One strand utilized per link (NU Provided)

Jacobs Consolidation Head End Single Mode Fiber with APC Connectors From Remote Carrier Site One strand utilized per link (NU Provided) Jacobs Consolidation Head End MA 330 Units Linked to Remote Carrier Sites MA RIU Interface Unit Multiple Signal are grouped Unit # 1 – iDEN SMR PCS Nextel / Sprint / US Cell Unit # 2 – Cell PCS PCS Ver Cell / Ver PCS ATT / T Mobile Combines RF inputs from one or more cellular networks & up to 3 separate frequency conditioners can be contained in one chassis MA 410 Monitoring MA 330 Units Linked to Target Buildings Single Mode Fiber with APC Connectors To Remote Target Building One strand utilized per link

Typical Coverage Remote Building Single Mode Fiber with APC connectors 1 Strand required per link MA 330 Units Linked to Jacobs Consolidation Head End MA Base Units Single Mode Fiber with APC connectors 2 strands required per active module ½” Helilax out to antennas MA 2000 Remote Cabinet

MA2000 Link Budget Calculations- Cell / PCS Frequency 860 935 1930.0 880 1930 MHz Technology/# Channels IDEN/12 SMR/12 CDMA/6 TDMA/8 GSM/8 UMTS/1 Protocol MRC/AP Output -1.00 12.50 0.00 6.00 12.00 5.50 9.50 dBm X-Way Splitter/combiner Losses (if appl.) -3.5 dB Wireless Lan Module (MA850) 0.0 1/2-inch Cable Length (ft) 200.0 ft. 1/2-inch Cable Loss (dB) -5.0 -7.6 Antenna Gain (dBi) 2.0 3.0 dBi MRC Antenna Output -7.5 4.4 -6.5 -2.1 3.9 -1.0 1.4 Distance (Radius) 45.0 Path Loss 53.9 54.6 60.9 54.1 Body Loss -2.0 Wall/Clutter Loss -10.0 -12.0 Fade Margin RSSI Level -78.0 -79.0 -76.0 -82.0 -72.0 75% Loading (CDMA only)   - -84.0 -85.0 Ant Area Covered InBuilding 4,455 Sq.ft.

Lessons Learned E911 Considerations RF Survey Fiber Plant Helps to have a bid for preferred vendor for mobile communications Troubleshooting Procedures