Une autre version pour ceux que ça intéresserait ,)Full description
The purpose of this procedure is to teach or to help the GSM RF Engineers to effectively optimize the TCH Drop Rate. There different reason of TCH Drop Rate. In this procedure it tries to explain ...
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SDCCH value
Descripción: Dimensión Ecologica
Full analytical ability questions
Banking Law, Credit policy, Monetary policy, Reserve Bank of India, Tools of monetary policyFull description
Conocimientos básicos de física para iniciar a introducirte a estos temas.Descripción completa
dimension espacial o demográficaDescripción completa
Description : Arzew
Descripción completa
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1 Area to be Covered = 35 Km^2 Area Type = Urban Total Users = 200K During BH Call Average Call Requests; ʄ1 = Average Call Duration; H1 = SMS Average SMS Requests; ʄ2 = Location Update =20% of total users
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0 1 Given That TRUNKED BLOCK CALLS CLEARED SYSTEM. (ErlangB)
11: c")" + c4 " ) ) 41 TCH ERLANGS per user during BH = 2*60/3600 E c4 ) ) 4;(
c")" + cc4 " ) ) 41 c"" ) " For Call Setup MS-T : A-MS-T= ʄ* HT-MS-T =2*2.9/3.6 =1.611mE " A2 = ʄ2*H2 =5*6/3.6 = 8.333mE c0 0$ * & If each once per user per BH. IMSI attach erlang =3.9/3.6=1.0833mE IMSI detach erlang = 2.9/3.6=0.8055mE Normal LA = 3.5/3.6 = 0.9722mE Periodic LA = 3.5/3.6 = 0.9722mE (set T3212=40 i.e. 4hrs) total=3.8332mE for 20% total population =3.8332 x 0.2 =>LU erlang =0.76664mE SDCCH Erlang = [Call setup + SMS +{ IMSI attach + IMSI dettach+ + Normal LU + Periodic Registration + False Access + Speech Quality}]*1.2 i.e. with Margin 10-20% SDCCH Erlang = Call setup + SMS+LU+20% marginSDCCH erlangs =1.611m+8.333m+.76664m+.4755m cc4 ) ) 4;<2($ %&
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YYYY Y YY Y Setting Pr(d) = -70dBm Setting fc = 0.9GHz or ʄ=1/3 Setting Pt=45dBm Setting Feeder Loss Fdrloss=30dB Setting Gt=1; (gain>1 means a Directional Antenna Characteristics of transmitter) Setting Gr=1; (gain=1 means isotropic type reception) Pt>> Feeder Loss+ FSPL>>Pr Pt-NETLOSS = Pr FSPL(db) = -(Pr-Pt+25)= -(-70-45+30)= 85 dB In other words pt͛=45-30; FSPL=85;Pr=-70dBm
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