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\ U <br /> `� 4x', k" ✓ , } n.A;a 'F 's t �xs4 h7z Ars £" e :" 'r ~x X ` t ✓ +_ 3 z <br /> { r ,rI L <br /> rAZ I <br /> t <br /> � e,. u � �..s`' + A�a �'� x • . :�f a �> n , '= ` ,�' ° .�r '� asa:+ .v R,.,:iM' `s <br /> 'Ssxf� sPOI�55-,✓"2Fr <br /> Defining Two Different Environments Wireless Engineering <br /> Rural/Agricultural Impact on Site <br /> Q Location <br /> ■ Wireless phone <br /> providers require <br /> 7 Fpm numerous ,cell sites' <br /> Urbatt/Tourism ■ Understanding their <br /> engineering <br /> ta.awi... ees, em requirements helps local ' <br /> n"_ die a governments contain <br /> rypee o/lari4rla deploYe/ willrenereLy eependdi.no.Nb.trni.ee tower proliferation <br /> I on elude remense, repulsion drill and I emrtiiq bywr <br /> uinnmernrffie <br /> Grid Pattern Wireless Tower Locations <br /> Wireless engineering theory <br /> uses a hexagonal grid Towers must be located with <br /> (4• IJ pattern to approximate precision — generally <br /> on pr ' I" 111'" real coverage : tva accepted "rule of <br /> zRcosx.r <br /> ■ Hexagons approximate a circle; thumb" : <br /> fit together without holes, and R ■ The location must be within 114 <br /> R ao• their centers are evenly spaced <br /> Ov hl of the designed coverage radius <br /> location from the "perfect'• <br /> As traffic grows, hexagon <br /> sizes continue to decrease wham „ xy •....ne�- ■ That "perfect location” is <br /> adleamma � was MAr defined by the wireless 1.grid <br /> ■ Example: AT&T uses about 2 pattern. •' <br /> mi "centers' in high traffic <br /> areas <br /> Propagation Studies Further Engineering Issues <br /> Propagation <br /> prediction software <br /> Defensible. reliable ---= =• o <br /> results IMC <br /> rbm<adam.r.q <br /> Ip <br /> •�• TMNorM m4va <br /> r <br /> Il�ge �npnlub <br /> EMR Compliance intermod Studies <br /> s <br /> Antenna Choices <br /> 5C� <br /> "Coverage" Site (Phase n Tower Height Impacts <br /> Wireless systems need <br /> continuous coverage PCs - Raising antennas <br /> with minimal overlap �r�®� trom too• to iso' <br /> ■—_■�=��� adds about Cl mi to the <br /> to provide "hole free" MOm®��� cwaage radius <br /> service <br /> itittetttt�teta� ��,. <br /> • A site every 4-8 miles for <br /> eel lular (Phase l). i .nm <br /> ■�s�e���u�■�i <br /> ■ A site every 2-4 miles for N%aa <br /> PCS ( Phase 1 ). ^ sass m..m re u.. eao Min, r tie. a <br /> alk, w an Am Wr <br /> IF Less in high-demand areas !y ^ <br /> 11 11 11 1 1 <br /> maim Cellular - Raising m " •� u > I <br /> Lai AM <br /> Buildings and terrain conditions can reduce coverage antennas horn 100' to lamina �m . 4, �.m „a <br /> VI <br /> iso• m <br /> adds about 0.9 mi to the mm n.. em ' •' am an , <br /> coverage radius "" ^' _m. .". am %Ie .o . .gym <br /> C <br /> mm <br /> Ell <br /> i d <br /> 60 <br /> JULY 25 , 2001 4 - <br /> All, <br /> AI <br /> z w..� ~:l !. r .M777M�11 I, <br /> f t t ^+ tANA 2 <br /> t, y`'s §"naY' kM -Y2A Kzi d$ + r .rti' c 2 s t,- d`64 + 'b .. , 4 y �� y <br /> t, s i.. a r - -. <br /> s <br /> 1s <br /> ., '4"'r ' <br />