1. A new suburb in outer Melbourne is under development but unfortunately notcovered byanywirelessservice.Thefollowingdiagramshowsanumber ofcandidatesitesthatcould suitabase station.SitesB,CandDarelocated withinthedevelopment.SiteAisonahill overlookingthedevelopmentsite. Chooseanoptionanddiscuss themeritsofyourchoice andthefactors that you took into account. Please use dot points.
Figure 1
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2. Thereisalargeevent comingupandyouneedtodimensionbasestation needstosupportmobile users.Youaregiventhefollowinginformation:
Table 1
| · 100,000 people willattend
· Theserviceprovideryouwork forhasa 50%marketshare · Speech usage is 10mE peruser · GOS for speech is5% · Data traffic peruser is 250kB/hr · Average call data capacity A is5Mbps · Soft handover equates to20% · Total BS power is 38dBm · Speech call requires 150mW in thedownlink |
Table 2
Table 3
1. What is your company’stotal clientele/subscribers/users
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2. Whatistheoffered traffic?Useanswer 1andspeechusagegiven
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3. Whatisthetotal CCHoverhead?
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4. Whatisthe%ageavailablecodesfortraffic?
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5. (a)What istheequivalentnumberofcircuits?
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(b) UsingtheErlangBtable(Table3) determinethecapacity.
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(c) Iftheofferedtraffic persectoris180Ehowmanycarriers areneeded usingthe value at question (b)?
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(d) Ifthemaximumpoweris45.4dBmor34.7Wattsandthecontrolpower is 38dBmor6.3Watts, ifyouareoperatingat90%power capacity,what isthepower(Watts) availabletosupport traffic?
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