ance. If there is already some kind of electronics maintenance at the proposed base station site, then it is going to be easier and cheaper to get service for our own base station. The best candidates for new wireless system base stations are the current base sta- tions from an existing wireless telephone system. In Sec. 33.6 we discuss the migration 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 Locations for Base Stations of radio bandwidth from FDMA or TDMA to CDMA. We also should consider the eco- nomic benefit of reusing base stations as well. It may be worth adding a new wireless telephone system in new radio spectrum to an existing set of base stations without re- placing the old system. There are also innovative solutions for base station installation that reduce costs or allow costs to be shared. Readers may have noticed that many malls and industrial parks across the United States have gotten large American flags on tall poles in recent years. Part of the cause may be patriotic fervor, but many of these flagpoles have cel- lular antennas inside. In addition to avoiding zoning issues altogether, the cellular company gets a lower lease cost by adding a desirable feature to the site. The end result of an existing-site survey is a list of base station possibilities and the relative advantage and disadvantages of each. Towers, buildings, transport, mainte- nance, and existing wireless telephony are all good reasons to consider a location for a base station. The combination of the site survey and the plot of good and acceptable cell locations allows planners to decide which sites to select for the placement of base stations. Of course, zoning problems, political conflicts, and other difficulties may intervene. When they do, this may mean moving the base station to an alternate location. In s