What is the equivalent number of circuits?

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

Answer:

 

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

Answer:

2. Whatistheoffered traffic?Useanswer 1andspeechusagegiven

Answer:

3. Whatisthetotal CCHoverhead?

Answer:

 

4. Whatisthe%ageavailablecodesfortraffic?

 

Answer:

 

5. (a)What istheequivalentnumberofcircuits?

Answer:

(b) UsingtheErlangBtable(Table3) determinethecapacity.

Answer:

(c) Iftheofferedtraffic persectoris180Ehowmanycarriers areneeded usingthe value at question (b)?

 

Answer:

(d) Ifthemaximumpoweris45.4dBmor34.7Wattsandthecontrolpower is 38dBmor6.3Watts, ifyouareoperatingat90%power capacity,what isthepower(Watts) availabletosupport traffic?

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