Decision Process : Set Service Area : Get Subscribers

Step 5 : Get Subscriber Numbers Subscriber numbers come from adding demographic (pops) and vehicle traffic data to get the total subscriber density. Then, make assumptions based on customer feedback about expected market penetration. Subscriber density is used to develop the location, radius, and number of phones for each cell. Commercial atlas's or census tract data can also help. Following the example Look at the coverage area - the total number of pops within the maroon area (assuming the population is distributed uniformly) is: ½ of 1,667 pops* = 834 (there's no such thing as ½ a person - round up) ½ of 4,398 pops = 2199 1/3 of 3,184 pops = 1062 1/10 of 5,674 pops = 568 ½ of 105 pops = 53 Total pops = 4716 * This is a guess based on what it looks like on the map. Coverage boundaries are not strict. As the design engineer, it is up to you to use your best judgement. Assumptions: Assume a 10% market penetration and 1.5 pops/vehicle. A 10% market penetration means 4716 x 10% = 472 subscribers exist in these areas. Now, add in the # of vehicles (assume 1.5 pops per vehicle): 333 (North) + 434 (South) = 767 vehicles x 1.5 pops per vehicle = 1151 pops Apply market penetration rate: 1151 pops x 10% = 115 subscribers The total number of subscribers for the entire area is 472 + 115 = 587. Important! There are 3 somewhat false assumptions being made here. 1) The vehicular traffic is from pops that do not live in the area. 2) The vehicular traffic and pops are uniform within the area. Typically, you have to identify where the major congregation of people are - a heavily used road or highway, a mall, major office building, arenas, etc. - to have a better understanding of the pockets of greater use. 3) Contributions from commercial areas (low census pops, but a high amount of potential users) are not considered. This is the case for the airport shown. It is important to understand that some of the calculations you make are approximate, at best. Continue with Step 6: Set Cell Site Type

This information is proprietary to Lucent Technologies.
Design, Format, Edit, Graphics, etc is the work of Gary Wagoner along with an 11 member development team.