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■p-: '.v,„ <br />tf'■ir <br />P' <br />m.^ <br />U' <br />1^" <br />IIP <br />Is#!''®- <br />m <br />Cell Site <br />Seiscticn <br />Cellular telephone serv'ice is expanded In a given area to provide better ser\ice to cellular <br />custontcrs. This can be dene in 'wo ways: extending the ceverr.ge tn ne’v areas nr increasing <br />the capacity of the system within the current ser/ice area. <br />Tlie decision to expand the system depends on a number of factors. First, the number of current <br />customers within the area and the capacity of the current system are anahtted to identic the <br />need to expand. Second, the quality of serv'ice within the area is constantly being e**alua?ed, <br />both electronically at the switching equipment, where every cail is monitored and any ser/ice <br />failures are recorded, and throuch feedback from customers. <br />Once the decision 'eejn made to errand . r .oivc.ve er- xc:. x* .icl-: ' iC .. !■> <br />\'cwVector prepa ’'*!' ■; ;''‘eiiminar>'design '.naiy*’’;'^ '" 'c '• •* • ‘-iW.r-f'- v^T'ir, <br />the serN'ice area are -ntered Into a computer. Vili .i .'.crij. .uiiaMe.s. .-uV'. .i.s .aucn.a.1 <br />height, available treouencies. and equipment characteristics, “"•m mis inrermation the en­ <br />gineers determine 'caren .:rea tor the '''i.m.mt ^ c :he ;n:cnn:; t <br />.maximize scr%ice .\aio ;;te ceil. When dd> .c;r':v-;., m;;/. :. ■ c.;.\ : i“- > r:.;” <br />:ind other requirement ■ are provided to me re::l cst.ate and -a::- r v:..‘n :onsu:tanrs. <br />With lhi.s information. :he “eai est.ite acquisiri.-n con^uitan' <br />.lAvI .ank poiciilKi! T'.tc .Vilowinc Is .« . ^u i au>. \ i .i.w. <br />Tdsrria :■*. \ientifv <br />CGSA Cellular Geii^rauhical Sendee \rea. TIte hound, <br />deiermineu In'me ’-rucrai \..ommunic;»tion>mi.sMi-ri <br />that radio .signals ;r ''n he >ysiem stay within the boundaries 'i :.tc <br />•tc enure >\>ic:n ;.re <br />e .1 c.uc'J jO <br />The Cellular <br />grid pattern. This <br />therefore, fewer <br />■‘.sectorization". <br />;rid.iA. nc'W'.hin the <br />t pr. • ides cf crt.gc :Vr <br />.• ivap.icts. Ti’..s <br />..cjd .i .Att.tg uuti <br />Topography, Land Forms and Ollier Lhmstraim.s. I .ne : .r,a,ys:s conducted by <br />the engineers takes iniii cor.<ider;alnn the hiiis vv; . r:- • -ve •re.'. BiL'icany. <br />a line of sight relalion.^hip is needed between the antc.-tni. .ir.d th. ce.i .i..r telephone :o in.surc <br />quality serv'ice. There are often land features .vithin a .search are.* th./i iimit the options tor <br />site locations. Features such as bodies of water, .swamps and .steep slope.s may ,;fove impo.ssihle <br />to build upon, and since cell sites must be periodically maintained, they must be accessible to <br />technicians year-round. Therefore, we need to find sites near the center of the search area, at <br />the optimum elevation, and accessible by existing roadw.nys. Sites with existing or proposed <br />high-rise buildings nearby must also be avoided because of the potential for “shadowing" within <br />the service area. <br />Since alt of the cell sites work together (calls are automatically handed off from one cell to <br />another as the driver travels lietween coverage areas), one antenna may not he li^ered or <br />raised without affecting the performance of that cell and adjacent cells. The mmbination of <br />these factors results in the identification of well-defined "preferred locations" within the search <br />area. <br />1 <br />■i <br />1 <br />■S <br />,1