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Lawrence Berkeley National Laboratory (LBNL) has been a leader in science and engineering research for 75 years. The problem is that the hill-and-valley topography of the site leads to inconsistent and sometimes nonexistent cellular coverage: buildings on hilltops receive good coverage, while buildings located in the valleys (and sometimes built into hillsides) have little or no coverage. Cingular first deployed a micro base station in LBNL's data center along with a Main Hub, Expansion Hubs, Remote Access Units (RAUs), and antennas. Today, the deployment spans 10 buildings and includes 4 Main Hubs, 13 Expansion Hubs, and about 100 antennas. The Main Hubs are linked by fiber with the Expansion Hubs, and then wireless signals are carried to the RAUs and antennas via Cat-5 cabling.
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