Check and Analysis FTP Download Speed Problem

7/23/2019 Check and Analysis FTP Download Speed Problem

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How to basically analysis FTP

download speed



Step for solve the problem

Configuration Parameter

PS Cell status

Drive Test prepare

How to find ftp problem reason

Probe log check



Configuration Parameter

• e must grant the following parameter is already

configured!

" #$C

" Static PDCH

" %dle Timeslot

" &ore parameters for improve the 'P(S performance



Parameter check

• )ne cell with one uni*ue PTP#$C must be guaranteed! " e need check PTP#$C number and Cell number+ it must be same

• e can also using &&, command! -,ist PTP#$C .



Parameter check

• )ne cell must configure / continue static PDTCH in #CCHT(0



Parameter check

•Check the following parameter! " %dle timeslot ： For the S/// configuration+ site should be enough idle

timeslot e1cept the cascaded site+ so we suggest that all sites set the

idle timeslot as /2

" Suggest use the following &&, for in*uire all sites idle timeslot!

• ,ST %D,3TS!



Parameter check

• Check the following parameter! " -4llow 3 Down ' up Switch. should open



PS Cell status• e must ensure that all cell 'P(S services is normal+ we can check it in

&&,! " &&, Command! DSP PSC3,,! %D0T5P36#5#SC7

• Cell Working State: should be -on working.+ otherwise may the cell can8tget DSP resource

• Cell Um Admin State! should be -unblocked.+ if both 9m and 'bblocked +may site down

• Cell Gb Admin State! should be -unblocked.+ if it8s blocked and Cell 9m is9nblocked+ maybe no #$C configured % this cell



Drive Test prepare

• hen DT team reach cluster and start DT+ first theyshould check following!

" &S side! Settings :; connectivity :; <etwork 4ccess Point :;

4ccess point name should be !.111.=4ircel 4P<>

" ,aptop! Fire wall should be turn off+ all the program which may

using internet services should be shut down?

" #attery should be well charged for both &S and laptop?

" %n Probe+ $iew :; %nformation :; -Ftp info. +see what happened

" %f <ew FTP available under this cluster+ first using the new FTP

server? " %n Probe+ -Test plan. :; -FTP download .+ we should guarantee

that user+ password +and file name is correct+ Don8t change other

setting in the ftp download page?



@AB/2B

How to find ftp problem reason• cell broadcast system infomationE

%n idle mode+ system information E must be broadcasted+ ifno S% E+ pl contact #SS guy solve the e*uipment problem



• / ， 4TT4CH success

%f attach failed+ and the reason is -'P(S service not allowed.+ normally+

it8s S%& without 'P(S right

%f -services not allowed in this P,&<.+ normally+ S%& card no money




• E ， PDP active success

%f failed+ pl check the cause!

%f the cause is . re*uested service option not subscribed.+

which mean that 4P< access reGected by H,(+ pl contact

(C)& for open the 4P< of (C)&<3T

%f other cause+ pl contact #SS B S'S< guy solve it+ normally

we meet the following cause!




• 2 ， Still almost ero download speed %f you find P()#3 continues PDP active and then PDP deactivate

for about every E@ seconds+ normally it8s mean ftp server is not

available? e should carefully check in Test plan+ all setting is )I or

not

: Port+ 9ser+ password+ ftp download file name

Then+ we can using the &S as modern+ check first ping the ftp

address is )I

: %f not )I+ try another FTP server7 %f )I+ carefully check test

plan againJ %f still no problem +try to visit internet webpage+ if )I+

then you can using the internet FTP server?




How to find ftp problem reason• Transmission network problem

" Check whether or not any transmission alarm in the sector

" %n &/@@@+ we check the following items!

• ':4bis &easurement ='4bis> :; T(49 ,ink &easurement

• e calculate the ':4bis error rate using the following formula!

=,K4@/L,K4@E> B =,K4@2 L ,K4@>+ %f this value big than @?M+ it maycause problem

L9A02:Numbe

r of

ReceivedOut-of-

Synchroniza

tion RA!

"rame#

L9A0$:Number of

Received

%hec& 'rror

RA! "rame#

L9A0(:Numbe

r of Sent

)a*id RA!

"rame#

L9A0+:Numbe

r of Sent

'm,ty RA!

"rame#



Probe log check

• hy low download speed

" #ad CB%

" <ot enough resource " Ftp server limit the speed



Probe log check• #ad CB%

" APSIN&34<N#3P value and &CS codec scheme table? %f ftp download speed is

low + we first check it8s APSIN&34<N#3P+ it should be appro1imately match?

= )therwise some other problem may come >

.S/1'AN'. 1%S code #cheme

3" 3' 34 mc#-

3% 3 3A 3 mc#-

3 35 36 3+ mc#-5

3( 3$ 32 33 mc#-6

30 0" 0' 04 mc#-+



Probe log check• <ot enough resource

" <ormally+ short of %dle timeslot B PDCH will greatly affect the speed!

FTP download + normally we should get 2 timeslot for download+ if the average value

less than E+ we will not get high speed

<o idle timeslot! %t will also make low speed!

)ne scene! APSIN&34<N#3P continually keep good =F> and &CS scheme is only

O+ may no enough idle timeslot for bidding?



Probe log check• Ftp server limit the speed

" %f the ftp server is very slow+ even the CB% is very good+ we will get low

speed? <ormally+ if 9m is good and high layer limit the speed+ Dummy

block will come in downlink? =dummy block using CS:>

" So+ if we see PDCH channel with high CS : code rate + normally it8s ftp

server problem?

Check and Analysis FTP Download Speed Problem

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