August 11, 2000 2000
Jim Luan, Lin Mubao
Drive Test Procedure Preparation Drive Test FICS Netplan
!"T#$%P
Statistics Analysis Proble Finding 05/05/15
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Drive Test Procedure Preparation Drive Test FICS Netplan
!"T#$%P
Statistics Analysis Proble Finding 05/05/15
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Preparation &1' • De(inition File – )it*out it, it is ipossible to observe overs*ooing neig*bors – $enDe(+e-e can convert FP to de(inition (ile
Neighbor list with definition file
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Neighbor list without definition file
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Preparation &2' • Fre.uency Plan / Con(iguration ap • So(tareT%S, FICS, $%P, $%P, !"T • 3ardare T%S, $PS, Portable PC • Test Proble S*eet • 4oute • ap
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Drive Test • For 5enc*ar6 – 2 inutes per call – 10 7 18 inutes a log (iles – Force to appropriate band &$S only, DCS only or Dual'
• For Special Proble – Planning route – No liitation 05/05/15
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T%S Introduction • Inter(ace • Functions
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9og File Process T%S 9og File FICS FT
CS!
STA
%-cel !5 NP#T:T NetPlan 4oute ap 05/05/15
Much shorter cycle time by VOT and GEP.
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T%S log (ile Analysis Below lists coon !robles which c"n be obser#ed fro $ri#e %est &og'
• ;ndecoded 5CC3
• Poor Coverage
• 5SIC ;ndecode in "t*er Site • ;nreasonable Serving Area • No 3andover • Inter(erence • Delay 3andover
• 3andover Failure
• Ping Pong 3andover
• 3andover 9oss
• Negative 3andover
• ;9 Drop
• "vers*ooting
• Drop Call
• 3ig* "verlapping
• Sudden Poer Drop
• No Doinant Server
• S Poer 4apid Increase
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;ndecoded 5CC3 &1' $escri!tion) – B*+,s c"n-t be decoded in 5s – .su"ll consider 3 strongest neighbors
e"son) – ,& shift onl decode s"e site B*+,s – ,h"nnel interference – NonB,, c"rrier no dedic"ted s!ectru for B,, 05/05/15
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;ndecoded 5CC3 &2'
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5SIC ;ndecode in "t*er Site $escri!tion) – B*+, in s"e site c"n be decoded but not for other sites – "ndo#er c"n onl h"!!en in intr"site b"sis – +t is siil"r to forer ;ndecoded 5CC3 c"se
e"son) – ,& shift • ,& rec"libr"tion is reuired • No one onitors , "l"rs 05/05/15
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No 3andover &1' $escri!tion) – Neighbor B*+, is decoded "nd ,N h"ndo#er reuireent is fulfilled but there is ne#er " h"ndo#er
e"son) – issing neighbor • No such neighbor in , d"t"b"se
– +ncorrect e9tern"l neighbor • %"rget cell-s &:,/B,,/B*+, in "dd;neighbor is different fro those in eui!;rtf •
– N > hret' re"t ;:+N' +!ro!er "lgorith 17 setting – issing;r!t ?1 – *er#ing cell o#ershoots/co#ers too f"r "w" – efer to * B** *t"tistics :n"lsis "ndboo@
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No 3andover &2'
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Delay 3andover &1' $escri!tion) – Neighbor B*+, is decoded but h"ndo#er occurs in uch l"ter tie
e"son) – :ll !ossible neighbors suffer bloc@ing – &"rge hret A hre"#e – u"l;!ower;fl"g is en"bled full B%*/* !ower ust be re"ched before h"ndo#er – &"rge h"ndo#er;recognied;!eriod "nd bss"!;t7 setting – efer to * B** *t"tistics :n"lsis "ndboo@
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Delay 3andover &2'
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Ping Pong 3andover &1' $escri!tion) – &ot of h"ndo#ers between cells – C%ie between "ndo#erD is "round hretAhre"#e of such c"use
e"son) – +!ro!er h"rdw"re c"libr"tion – "rdw"re f"ult – .&/$& interference – Neg"ti#e h"ndo#er – $ifferent co#er"ge foot!rint for "ntenn"s of " cell
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Ping Pong 3andover &2'
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Negative 3andover &1' $escri!tion) – *er#ing cell h"nds o#er to " we"@er neighbor
e"son) – ho;onl;"9;!ower is en"bled – u"l;"rgin;fl"g is dis"bled – ho;"rgin;us"ge;fl"g is en"bled with neg"ti#e ho;"rgin;r9u"l/r9le# – Neg"ti#e ;:+N – icrocellul"r "lgoriths "re en"bled es!eci"ll t!e 5 05/05/15
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Negative 3andover &2' 5(dB before
66dB "fter
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"verS*ooting &1' $escri!tion) – ,ell shoots "t f"r dist"nce but th"t loc"tion h"s closer cells "round
e"son) – #ershooting cell h"s s"ll downtilt 0 degreeE – #ershooting cell h"s too high "ltitude – ,loser cells h"#e o#ershooting "s well – B*+, of closer cells c"n-t be decoded 05/05/15
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"verS*ooting &2'
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3ig* "verlapping &1' $escri!tion) – ,ells h"#e "For r9le#el difference within G5dB
e"son) – #ershooting – %oo "n cells in th"t "re" – =oor "ntenn" downtilt
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3ig* "verlapping &2' 65dB 65dB
#er &"!!ing :re"
65dB
65dB 05/05/15
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No Doinant Server &1' $escri!tion) – 9le#el of best neighbors "re close to th"t of ser#ing cell
e"son) – =oor "ntenn" downtilt – &"c@ of ne"rb site
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No Doinant Server &2'
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Poor Coverage &1' $escri!tion) – – – –
&ow r9le#el with r9u"lit +n rur"l "re" r9le#el is less th"n 15 H(5dBI +n cit center r9le#el is less th"n 35 H75dBI $ifferent loc"tion h"s different threshold noise le#el is the @e !oint
e"son) – – – –
&"c@ of cell site B*+, of doin"nt ser#er c"n-t be decoded $oin"nt ser#er h"s bloc@ing or cellb"r "ndo#er !roble' <'g' issing J incorrect neighbor neg"ti#e h"ndo#er no J del" h"ndo#er
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Poor Coverage &2'
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;nreasonable Serving Area &1' $escri!tion) – ,o#er"ge "re" of the cell is incoherent to the "ntenn" direction
e"son) – Krong c"ble connection to "ntenn"s – +ncorrect record of "ntenn" orient"tion – +ncorrect :N%
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;nreasonable Serving Area &2' Cell ID101 5CC3 <8
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Cell ID102
Cell ID10<
5CC3 =0
5CC3 =8
2(
Inter(erence &1' $escri!tion) – igh r9le#el with r9u"lit
e"son) – ,h"nnel interference – Not using doin"nt ser#er – No h"ndo#er – %urn the corner with del" h"ndo#er
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Inter(erence &2'
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3andover Failure &1' $escri!tion) – * f"ils to re"ch t"rget cell so return to source cell – * sends L:+&.< "nd .&*:B to source cell "nd there is res!onse
e"son) – ,h"nnel interference – =oor co#er"ge – <9tern"l interference "t .& li@e wideb"nd re!e"tor – efer to * B** *t"tistics :n"lsis "ndboo@ 05/05/15
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3andover Failure &2'
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3andover 9oss &1' $escri!tion) – * f"ils to re"ch t"rget cell but c"n-t return to source cell – * sends L:+&.< "nd .&*:B to source cell but no res!onse
e"son) – ,h"nnel interference – =oor co#er"ge – <9tern"l interference "t .& li@e wideb"nd re!e"tor – efer to * B** *t"tistics :n"lsis "ndboo@
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3andover 9oss &2'
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;9 Drop &1' $escri!tion) – B** doesn-t recei#e .& *:,, for lin@;f"il ties – B** sto!s tr"nsitting $& !ower
e"son) – <9tern"l interference – ,h"nnel interference – L"ult "ncill"r' .& !"th loss MMM $& !"th loss – efer to * B** *t"tistics :n"lsis "ndboo@
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;9 Drop &2'
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Drop Call &1' $escri!tion) – $& c"se) "dio;lin@;tieout counter decre"ses to 0 – .& c"se) lin@;f"il counter decre"ses to 0 – &"er 2) B**/* send *:B/$+*, in e#er %200 for N2001 ties "nd no res!onse fro reci!ient
e"son) – :ll c"ses in this !resent"tion – efer to * B** *t"tistics :n"lsis "ndboo@
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Drop Call &2'
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Sudden Poer Drop &1' $escri!tion) – $edic"ted :L,N h"s signific"nt non!ower control r9le#el difference fro r9le#el of B,,
e"son) – No/i!ro!er %O !ower c"libr"tion – L"ult "ncill"r' <'g' cobiner filter'' – $ifferent c"ble lengths fro B%* to "ntenn"s – $ue to "ir cobing so "ntenn"s h"#e different co#er"ge foot!rints 05/05/15
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Sudden Poer Drop &2'
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S Poer 4apid Increase &1' $escri!tion) – * r"!idl incre"ses its %O !ower due to • !tiised =ower ,ontrol or • .& *:,, ultifr"es "ren-t recei#ed for lin@;f"il lin@;"bout;to;f"il ties
e"son) – *udden .& interference e'g' wideb"nd re!e"tor ch"nnel interference – %oo uch r"!id !ower down – l;r9le#;ul;! is too s"ll 05/05/15
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S Poer 4apid Increase &2'
.& !ower r"!id incre"se fro 1( to 5 suddenl
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3o $%P 3elp> 3elp to identi(y belo proble in !IS;A9 basis
• Co?c*annel inter(erence • Ad@acent?C*annel inter(erence • utual neig*bor • issing neig*bor • ;nreasonable neig*bor • Incorrect e-ternal neig*bor
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3o !"T 3elp> 3elp to identi(y belo proble in !IS;A9 basis • Ping pong 3" • "vers*ooting • No doinant server • Poor coverage • ;nreasonable serving area • Inter(erence • 3" (ailure • 3" loss • Drop call
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3o C %-tractor 3elp> %-tract ost 5SS paraeter (or re(erence
• Cell 7 eg *re.ave,*re.t,N,P • 5TS 7 eg antennaBselect • 4TF 7 c*ec6 any incorrect e-ternal neig*bor • Neig*bor 7 eg *oBargin, delayBtier
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