, planning for growth, and alternative backhaul technologies. In Chap. 36, "Signaling Capacity Planning," we turn to the process of planning our equipment and transport to ensure the network's ability to meet the demand for signaling, including handoffs, call processing, roamers, and short message service (SMS). In Chap. 37, "MSC Transport Planning," we discuss inter-MSC transport, as well as transport between the MSC and the public switched telephone network (PSTN) and the public packet data network (PPDN). We wrap up Part 6 by addressing special situations such as asymmetric demand and market-entry planning issues in Chap. 38, "Special Situations." Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com) Copyright © 2004 The McGraw-Hill Companies. All rights reserved. Anv use is subject to the Terms of Use as given at the website. Source: CDMA CAPACITY AND QUALITY OPTIMIZATION Chapter Estimating Wireless Telephone Demand The demand for wireless telephone services from a given service provider is the pri- mary determinant in the size and design of a wireless network. The number of cells, the capacity of each cell, and the approximate location of each base station should be planned with this one variable as the key factor. Since we need to plan and deploy networks ahead of demand, we must have a way of estimating the demand for voice and data services. Historical data, demographics, and market analysis are all important elements in calculating demand. 31.1 Estimating Voice Call Demand We start our estimate of wireless telephone demand with the demand for wireless voice telephone service. And we start our estimate of voice telephone demand by defining our market. The business plan for a code division multiple access (CDMA) wireless tele- phone system is based on some picture of who is going to use wireless service rather than landline service to make telephone calls and then going to pay their telephone bills so that we can make money. There are four sources of voice subscriber