8/19/2019 TCH Drop Optimization Tips

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TCH drop optimization tips

Let's discuss possible solutions to reduce TCH drop in GSM networks.

Steps:-

1.Find out at which leel !ou are "ettin" #ore drops.$adio%&bis%Transcoder%&bis%$F old etc.

.Check !our (CCH and TCH plan i) !ou )ind it need to be tune then run &F* +&uto#atic Fre, plan and i#ple#ent new Fre, plan.

.Check nei"hbour count )or each cell. &dd or re#oe ad/acencies where re,uired.

0.Check so#e i#portant (TS para#eters like $LT+reco##ended-0%&$LT and&H$LT+reco##ended- etc.

2.&lso check &M$ )ull and hal) rate codecs and its thresolds used in each cell.

.Check )or an! inconsistencies in para#eters like diersit!3sed +$456%4T7 used +4T7%MS#in and #a8 trans#it power+*M59 *M&7%(TS #in and #a8 trans#it power+*M59

*M&7%r8Le&ccessMin +$7*% &ntenna Hoppin"+&H;*% etc.>www.teleco#source.net>showthr...-4L-$7-=ualit!

?.5#proe handoer success ratio-H;S$. Click below link to see how to i#proe H;S$.

http:>>www.teleco#source.net>showthr...or-a-G-s!ste#

@.$educe hal) rate tra))ic whereer possible.Tune F$L + Lower li#it )or hal) rate tri""er F$3+upper li#it to )ull rate tri""er )or 9on-&M$ calls and

&F$L + Lower li#it )or hal) rate tri""er &F$3 +upper li#it to )ull rate tri""er )or 9on-&M$

calls considerin" utiliAation.

&lso check this thresold alue at (SC leel also.

1B.$e#oe all hardware related (TS alar#s like Channel )ailure rate%T$7 )ault! etc. and also

recti)! path loss issues.

11.$educe oershootin" b! "iin" tilt to antenna o) cells which are takin" calls )ro# er! lon"

distance.

5) !ou hae so#e #ore tips please share.....

http://www.telecomsource.net/tags.php?tag=gsmhttp://www.telecomsource.net/tags.php?tag=gsmhttp://www.telecomsource.net/showthread.php?185-How-to-improve-DL-RX-Qualityhttp://www.telecomsource.net/showthread.php?242-How-to-improve-HOSR-for-a-2G-systemhttp://www.telecomsource.net/showthread.php?185-How-to-improve-DL-RX-Qualityhttp://www.telecomsource.net/showthread.php?242-How-to-improve-HOSR-for-a-2G-systemhttp://www.telecomsource.net/tags.php?tag=gsm

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How to improve DL RX Quality?

Friends%

4L r8 ,ualit! is the one 5#portant *5 which is "enerall! di))icult to achiee speciall! in narrow band spectru#.

So#e solutions are:

• 5#proe (CCH and TCH plan

• Count inter)erence D on both (CCH and TCH so as to know an! )re,

addition>deletion need to do in (CCH or TCH *lan

• 4iersit!%&ntenna Hoppin" also i#proe 4L $8 =ual

• 4L 4T7 also help to i#proe 4L =ual

•  9ei"hbour plan #ust be checked )or an! discripancies or addition>deletion

re,uired

*lease know i) !ou hae an! other solute

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Hi dear,

 You can do following things to improve HOSR.

1.HOSR is directly related to DL ual so improve networ! DL ual.please refer to How to improve DL RX Quality?

". You can also increase timer #$1%$ in &S'.(a!e sure it should )e less than #1%atlease )y " sec.$. *lso chec! if there are lot of +ntracell HO failures.#hen chec! for Hardware issuesor inracell HO theresolds.. #ry to change -&#,/ual and Level (argin and see any e0ect.

. 'hec! if (S' controlled HO2s are getting failed.3. Remove 'o4&''H,&S+' com)ination in neigh)our.5. Remove hardware alarms

http://www.telecomsource.net/showthread.php?185-How-to-improve-DL-RX-Qualityhttp://www.telecomsource.net/showthread.php?185-How-to-improve-DL-RX-Quality

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&elow mentioned timers will help you to improve HOSR.T7 #imer for sending outgoing e6ternal inter4cell handover reuests and handovercommandsT8 #imer for running outgoing e6ternal inter4cell handover commands and handovercompletion or clearanceT3103 7rom the time when an intra4cell or inter4cell handover command is e6ecutedto the time of an intra4cell or inter4cell handover completionT3105 During an asynchronous handover, from the time when the S sends the(S a physical message to the time when the S receives the set asynchronous)alanced mode 8S*&(9 from the (ST3124 During an asynchronous handover, from the time when the (S sends thenetwor! a handover access &urst message to the time when the (S receives aphysical message from the S

:hen these timers are used shown )elow;