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8/9/2019 (28)_RTWP_INTERNAL[1]

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Communication

RTWP Issues

C.Trocado/H.Fischer051120 (10) RTWP INTERNAL V1..!!"


2/18

2

Overview

Case1: Hi#h $L i%"er&ere%ce !ea's aso dri%# o* "ra&&ic

($+R,.0-$+R,.5) Case2:IP s*i"ch se""i%#s a%d "oera%ces o& RTWP

4.7.05:co%"e%" dis"ri"ed "o VF2

Case3:o%3/Ericsso% $E V400 "ra%si""i%# "oo ch !o*er %der

a%a3sis

Case67 e&ec" cha%%e card (CHC 64)

Case57 Ce i!osio% e&&ec"

Case87RTWP !ea's dri%# oss o& s3%ch


3/18

,

Case1: High UL iner!eren"e #ea$s a%s& 'uring %&w ra!!i"

(h&r 'es"ri#i&n)i*#a" &n new&r$: eceer 2006 VF9R7

Has ee% oser:ed i% VF9R %e"*or' a%d is !rese%" i% a a;or %e"*or's.Hi#h $L shor" !ea's are :isie- *hich do %o" raise "he a:era#e :er3 ch. I&"he3 are hi#her "he% "he co%#es"io% "hreshod (e.#. RTWP0 or 5d)a%d a ca is s"ar"ed i% "ha" ce- i" *i e re;ec"ed de "o co%#es"io%

+ai% i!ac" is "ha" cs"oers are caii%#- "ha" or $L co%#es"io% co%"ro is%o" *or'i%#- ha:i%# %o"hi%# "o do *i"h i"

A%a3sis7 8.>.05 The !ea's ecoe ore &re?e%" *i"h "ra&&ic. The3 are %o" cased 3 e@"er%a i%"er&ere%ce (as o%# as i% a%d a:era#e

RTWP reai% o*) Crre%" ss!ec"s is "he $Es 3 %'%o*% ea%s cased "o se%d shor"3 *i"h

hi#h !o*er

o"io% !a%

%o" 3e" '%o*%- ecase %o" :isie i% L e%:iro%e%". I%:es"i#a"io%s o%#oi%# Po"e%"ia *or'aro%d7 NodeB hi#her a3er &i"eri%# *hich *od sr!ress "he

:isiii"3 o& "he !ee's


4/18


5/185

Case2: IP swi"h seings an' &%eran"es &! RTWP

(h&r 'es"ri#i&n)i*#a" &n new&r$:

eceer 2006 VF9R- VF2 a%d T+7 Wro%# $A+C IP s*i"ch se""i%#s are &re?e%"3 oser:ed i% &ied as *e as

ro'e% seiri#id caes. To co!e *i"h i"- P+ co%"ers ha:e ee% e:aa"ed &or

a ss!ec"e:e o& D100 a%d ess "ha% 50 A!!. ,0..50 o& NodeBs ss!icios " %o" &a"3 ha:e ee% &o%d *i"h

i%s"aa"io% !roes (re&er I%s"aa"io% sec"io% o& $N sides) E:e% *i"h a se""i%#s correc"- "here soe"ies reai% NodeBs *i"h

i%.05

The HW is *or'i%# !ro!er3. Cs"oers issi%"er!re" "oera%ce s!eci&ica"io%s


6/188

Case2: Wh/ sha%% UCO IP swi"hes / se "&rre"%/

For reaso%s

1. a:oid de#raded se%si"i:i"3 o& "he NodeB

in "ase &! aenuai&n && high

2. a:oid i%creased i%"er&ere%ce "o "he NodeB

in "ase &! aenuai&n && %&w

,. a:oid "oo i# o&&se"s i% RTWP

wih i*#a" &n he &uer %& #&wer "&nr&% RCH

6. a:oid "oo i# o&&se"s i% RTWP

wih i*#a" &n ra'i& res&ur"e *anage*en a'*issi&n6 "&ngesi&n6 ...


7/18


8/184

Case2: Is a wr&ng IP swi"h seing &! 1'9 &!!se $i%%ing

No- " "he i!ac"s i%creases a" eas" *i"h "he s?are *i"h "he o&&se"7

degraded sensitivity

increased interference


9/18

E@!ec"ed i%i RTWP (e:e)7 18J118

Case2: Wha RTWP va%ues are e-#e"e' in an e*#/

"e%% %&w ra!!i"

I% a% e!"3 ce !ro:ided "ha" "here is %o e@"er%a i%"er&ere%ce (%ei"her i%"ra&re?e%c3 %or i%"er&re?e%c3) "he easred RWTP re&ec"s o%3 "he %oise e:e i%!" e?i:ae%" a" NodeB

i%!"

The i%!" e?i:ae%" %oise ca% e de&i%ed 3 F'TB i% dB = 104dB K FdBM (F=%oise &i#re- 'T=1>6dB/H- BO6+H 88dBH) FdBM = 1.5... ,.5 (%oise &i#re ra%#e o& "he NodeB6a%d FTB = 108.5... 106.5dB

+easri%# FTB *i"h 6dB aso"e "oera%ce res"s i%

RTWP ; ...11>


10/1810

Case2: Can *ini*u* RTWP e use' as !ai%ure in'i"a&r

Qes- " "his is o%3 a coarse i%dica"or7

I& i%


11/1811

Case2: H&w & #r&"ee' ase' &n ?*ini*u* RTWPL,=@

RTWP= 0

make sure thatNodeB & cell

is active

yes

RTWP< 0

no

yesNodeB !ith very good noise "gure or sus#ect for

!rong $%'C( $)P*s!itchesloose+,roken R- ca,les

make sure that installation is (.

RTWP

< /0

yes W defect

TR1 + $%'C(

RTWP2 /00

RTWP2 /30

no

no

yes

no

sus#ect for 4us#ect for e5ternal interference !rong $%'C( $)P*s!itches

make sure that installation is (.

yes

sus#ect for e5ternal

interference6disconnect anntena &terminate NodeB+T' in#ut

RTWP2 /30

yes W defectTR1 + $%'C(

no no

W (. 7 W (. 7 check for e5ternal interference 7


12/1812

Case2: H&w & se he UCO i# (wi"hes

Cs"oer doce%"a"io% a:aiae

Feeder cae a""e%a"io% s" e '%o*% (easred or caca"ed) &roT+A i%!" "o $A+C i%!" "a'i%# i%"o acco%"

E@ac" s!eci&ica"io% a%d e%#"h o& a caes- ;!ers- co%%ec"ors !i""ers i& a%3

Caca"e "he IP s*i"ch se""i%#s accordi%# "o &orao %o" se" "he IP s*i"ches %"i 3o ha:e a% e@!ec"ed readi%# o&

i%0

Do not set the DIP switches until you have anexpected reading of min_RTWP = 70!


13/18


14/18

16

Case2: C&n"%usi&n

I& NodeB has ee% :eri&ied accordi%# "o "he !rocedre

$A+C se""i%#s correc" No RF cae isses +i%


15/18

15

Case3: U, =A00 rans*iing wih && *u"h #&wer


>.10.05 $+R 6.07 essio% is iee%s as "oo &i%d roo" cases &or hi#h $L i%"er&ere%ce !ea's

do%e *i"h :ideo cas

A%a3sis7 o%3/Ericsso% $E V400 se%ds dri%# a""ach/de"ach a%d dri%# ca se"! &or

soe seco%ds &ar "oo ch !o*er $L i%"er&ere%ce easi3 reaches co%#es"io% "hreshod

Was %o" de"ec"ed *i"h a Saco chi!se" ased oie oes %o" e@!ai% "he hi#h $L !ea's i% a%3 %e"*or's- " cod e o%e roo"

case

o"io% !a% A%a3sis o%#oi%# "o e ae "o !oi%" "o $E /%e"*or'


16/18

18

Case4: e!e" "hanne% "ar' CHC 4A


+arch A!ri 2005- T+ %e"*or' Bo%%-ce Bo%% 1,5/$, A NodeB *i"h 40 No


17/18

1>

Case5: Ce%% i*#%&si&n e!!e" n& !&r "us&*er


2>.10.05 $+R 6.07 A "es" sessio% oadi%# a si%#e ce i% $L %ear "o i"s !oe ca!aci"3 (e.#. 14 $Es

doi%# :ideo cas o% 86') ead a&"er a shor" i%"er&ere%ce "o a $Es "ra%si""i%#

*i"h a@. !o*er &or a &e* seco%ds. $L RTWP *as :er3 hi#h

A%a3sis7 The e&&ec" de!e%ds o% "he $L oad o& "he ce. The ess oad is e@is"i%#- "he

s"ro%#er "he i%"er&erers %eed "o e "o !ro:o'e "he e&&ec"

The e&&ec" de!e%ds o% "he A9C charac"eris"ics o& "he a%ao# !ar"s

o"io% !a% No" 3e" '%o*% I%:es"i#a"io%s o%#oi%# "o &i%d RTWP !ea's aso i% o* oaded e%:iro%e%"


18/18

14

Case>:RTWP #ea$s 'uring %&ss &! s/n"h

(h&r 'es"ri#i&n)i*#a" &n new&r$: 20.11.057 Tic'e" NA01>28>66 (VF9R)- FEAT F150 CHC i!ee%"a"io%

se%ds Ga! coa%ds dri%# o"o&s3%c s"a"e a%d Grea !o*er co%"rocoa%ds (!/do*% de!e%di%# o% es"ia"ed IR)

dri%# "he "ra%si"io% "he i%' ?ai"3 is aread3 #ood (#ood &raes recei:ed) "

"he CHC s"i se%ds Ga! coa%ds "o "he $E- *hich ra!s i"s !o*er ! 15 PC coa%ds !er &rae ,0 G! coa%ds dri%# "ra%si"io% !hase

des!i"e #ood i%' ?ai"3 i% a%3 cases "his *i ead "o "ra%si" !o*er !ea's a" "he $E "ra%si""er a%d

"here&ore RTWP !ea's a" "he NB

Ne@" "e!s7 Wai"i%# &or CR

o"o&s3%c

"ra%si"io%

i%s3%cRL s3%c s"a"e

RL recei:ed &raes

$L !o*er co%"roa! a! a! a! a! rea rea rea rea rea rea rea

!roea"ic eha:ior

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