ntial users. We could use some bandwidth that the cable company is not already using, perhaps in the lower fre- quencies below the very high frequency (VHF) television band. Or we could use the physical wiring locations to run fiber optic cable for our own transport. In either case, Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com) Copyright © 2004 The McGraw-Hill Companies. All rights reserved. Any use is subject to the Terms of Use as given at the website. Planning Locations for Base Stations Planning for CDMA Capacity a cable television network is a good place to consider for a collection of base stations, or perhaps microcells, to serve a residential community. Business locations also have telephone transport. Microcells and picocells located in business districts likely will have transport already available for backhaul. This ap- plies not only to office complexes but also to shopping malls and other commercial cen- ters. Even housing developments and other busy residential areas usually have avail- able telephone transport that can be used for wireless telephone system backhaul from base stations. It is not enough that telephone transport exists; it also must be available for our use. The difficult areas for backhaul are the low-occupancy areas between high-occupancy areas, the commuting and travel zones. These zones could be highways or railroads. They are potentially lucrative wireless markets, for both voice and data, but do not nor- mally have transport available. Serving these areas means finding base station sites that can be connected to the MSC in areas that are not normally connected to the tele- phone network. When we are done evaluating good backhaul opportunities, we will have a geo- graphic layout of areas where telephone transport is cheap and available at the times when we will need it. These are the preferred places to put base stations based on transport opportunities. 32.6 Conclusion The selection of base station locations should be based primari