Accessibility/SSSR(Session setup success Rate):-Accessibility [%]: The ability of a user to obtain the requested service from the system XXpmRrcConnEstabSuccpmRrcConnEstabAtt - pmRrcConnEstabReattpmS1SigConnEstabSucc(pmErabEstabSuccInitpmErabEstabSuccA!!e!pmS1SigConnEstabAtt pmErabEstabAttInitpmErabEstabAttA!!e! Point:-Accessibility/SSSR is combination of 3 Phase.RRC Phase.S1 Signaling Phase.E-RA Phase.""RRC Set u! Success rate" # S1 Signalling Success rate" # ERA initial Success Rate"Accessibility/SSSR(Session setup success Rate):-SSSR Phase based on Counter:-.RRC Setup$-%ollo&ing counter are Res!onsible-PmRrcConnEstabAtt.PmRrcConnEstabAttReAttPmRrcConnEstabSucc !.S-Si"nallin" Setup$ %ollo&ing Counter are Res!onsible-PmS1SigConnEstabAtt.PmS1SigConnEstabSucc.'. #-RA$ #stablishment$ %ollo&ing Counter are Res!onsible-PmErabEstabAtt(nitPmErabEstabSucc(nit.PmErabEstabAttAdded.PmErabEstabSuccAdded.1. Step to find out the Problem with RRC Set up Success Rate%:- RRC Failure Counter needs to be checked . (PmRrcConnEstabFail):-#ollo$ing issue coul! be t%e reason &or PmRrcConnEstabFail $%ic% contributes to %a'e poor RRC Set up Success Rate%(! pmRrcConnEstabFail"ic:)%e total number o& &aile! RRC Connection establis%ments !ue to lac* o& connecte! users license(Probable Solutions#$ +pgra!e t%e ,-#(,icense -ey #ile. by +pgra!ing So&t$are( E/- #rom ,10A to ,101 an! ,12A to ,121(,121 %a'ing ,icense o& 0333 Connecte! user per E41( (,icense5So&t$are up-gra!ation acti'ity go'erns as per t%e agreement $it% customer.( Current 6licenseCapacityConnecte!+sers7 as per 8,A &or Sprint is 933 +sers per site( :&&loa! t%e )ra&&ic by optimi;ing o$n a;imut%5 tilt< neig%bouring sites a;imut%s5 tilt( 1y C%anging %R&"e'(in (=e&ault >alue -103!1.? It can be mo!i&ie! to -113 !b 1y Implementing @i-Cap Aarameter (I& Ba/ RRC Conn +sers more t%an 1935sector. ( =eataile! parameters %a'e been s%are! later I& still )ra&&ic loa! is more< plan ne$ site to o&&loa! or c%ange ,-# &rom 933 to 1333. ("1)$ *"1)+$* "1,$* "1,+$ .Accessibility/SSSR(Session setup success Rate):-+!pmRrcConnEstabFail-i.h"oad: )%e total number o& &aile! RRC Connection Establis%ments !ue to %ig% loa!(Soln# Same as abo'e(C! pmRrcConnEstabFail/'erload:)%e total number o& &aile! RRC Connection Establis%ments !ue to o'erloa!(Soln: Same as Abo'e(0! pmRrcConnEstabFailcti'e1ser"icenseE&ceeded:)%e number o& &aile! RRC establis%ments !ue to more acti'e users t%an $%at license allo$s(Soln# C%ec* Acti'e user per cell t%roug% counter Pmcti'e1ser0lSum2 Pmcti'e1ser1lsum( )ry to :&&loa! tra&&ic i& possible by c%anging A;imut%< )ilt or ,oa!ing @i-Cap Aarameter(Also c%ec* !istance o& +E &rom e4b< i& connecte! &rom &ar !istance< $e can c%ange parameterR/le'Accmin to Arotect access(E! pmRrcConnEstabFailFailure3nRadioProcedure: )%e number o& &aile! RRC establis%ments !ue to &aile! ra!io proce!ure( Ra!io con!itions< F! pmRrcConnEstabFail+earerdmissionRe4: )%e total number o& &aile! establis%ment o& RRC Connection !ue to t%e &act t%at all t%e +ECs bearers are reDecte! !uring bearer admission control(Soln# Implement %i-Cap Aarameter to allo$ more user( Also A=CC@ A!mission control )%res%ol! can be c%ange!( 1e&ore mo!i&ying t%is parameter< A=CC@ CCE +tili;ation nee! to be c%ec*e!?Counter- AmA!cc%Cce+til(it s%oul! be more t%an E3%.Accessibility/SSSR(Session setup success Rate):-5! pmRrcConnReestFail"ic(tReest:)%e number o& RRC Connection Reestablis%ments attempts t%at &aile! !ue to &eature FBulti-)arget RRC Connection Reestablis%mentF not beingenable!(Soln# 4ot inclu!e! in any pre!e&ine! scanner( So you %a'e to acti'ateScanner(-!pmRrcConnEstabFail"ack/fResources: )%e number o& &aile! RRC establis%ments !ue to lac* o& resourcesSoln: C%ec* t%e +tili;ation o& Cell an! try to :&&loa! by Implementing @i-Cap Aarameter< S%i&t tra&&ic on some less utili;e! cell(3! pmRrcConnEstabFail1nspecified: )%e number o& &aile! RRC establis%ments !ue to unspeci&ie! cause(Apart &rom t%at< &ollo$ing issues can be &urt%er c%ec*e!(Co'erage issue< +, Inter&erence issue< Alarm issue< @58 issue (Re-set &irst. i& reGuire! replace RR+( ACI plan< are also recommen!e! to re'ie$( RAC@ Root SeGuence In!e/ plan nee! to be re'ie$e!? 1ase! on HIero Correlation Iero con&iguration H parameter RAC@ root SeG in!e/ nee! to be plane!( #or 4cs 10< !i&&erence o& 13 is recommen!e! &or RAC@ root SeG in!e/ per cell(Accessibility/SSSR(Session setup success Rate):-). S1$si.nallin. :-)%ere is no any Speci&icot%er counter e/cept t%e &ollo$ing< %a'e been i!enti&ie!( #ollo$ing issues coul! be t%e reason &or%a'ing %ig% PmS1Si.ConnEstabFail $%ic% contributes to %a'e poor S1 signaling Success Rate%)4()ransport issue.: 4ee! to c%ec* #iber issue &rom IA1@ )eam()AC 8rong Con&igure: Con&igure Correct )AC as Aer =esign ( Are-R4=CIJ.( ,AC-)AC mapping: >ali!ate t%e ,AC-)AC mapping is correct as per =esign ( Are-R4=CIJ.( Incorrect or missing )AI-,AI pairing coul! result in Haccessibility &ailures H $%en +E attempts CS #allbac* to +B)S (,)E Attac% ReGuest o& type 6Combine! EAS5IBSI Attac%7.()%e BBE !eri'es t%e ,AI &rom t%e )AI o& t%e current ,)E cell< t%en BBE sen!s t%e 6,ocation +p!ate ReGuest7 to t%e target BSC5>,R(Accessibility/SSSR(Session setup success Rate):-!. Step to %nd out the Problem &ith S Si"nalin" Success Rate'$-3. #-RA$ (nitial Success Rate'-%ollo&ing counters are suggested to bechec)ed.A) pm#rab#stab*ail+br,l#nb *The total number of failed E-RA setu! attem!ts due to do&nlin) +R overload for resources common to the e,ode-.Soln$ Parameters that are required to be set as$ dl,on+brRatio*./0-1 dlTrans,&and&idth*1000-Accessibility/SSSR(Session setup success Rate):-$) pm#rab#stab*ail+br-l#nb *The total number of failed E-RA setu! attem!ts due to u!lin) +R overload for resources common to the e,ode-.Soln$ Parameters that are required to be set as$ $ul,on+brRatio*./0-1 1ulTrans,&and&idth*1000-C)pm#rab#stab*ailAdded.ic *The total number of failed establishment of added E-RAs due to license re2ects *3ulti!le Radio earer !er user or R4C 53-. Added E-RAs are all E-RAs !resent in S1 message E-RA Setu! Request-.,)pm#rab#stab*ail(nit.ic *The total number of failed establishment of initial E-RAs due to license re2ects *3ulti!le Radio earer !er user or R4C 53-. (nitial E-RAs are all E-RAs !resent in the S1 message (nitial Conte6t Setu! Request-.part from the abo'e mentioned counters2followin. points are also su..ested to be checked#1K Security up!ate #ail(0K >en!or speci&ic issue( 2K )4()ransport issue.(4ote: Couple o& t%e CSE S6103ES are s%are! as &ollo$s $%ic% %a'e been implemente! in li'e proDect to impro'e Accessability%(CSE S6103ES#1# RRC 0e.radation due to RRC Re4ect. I& Aarameters are !e&ine! as &ollo$s: no o& Aucc% CJI user-1L3?no o& Aucc% Sr user-1L3An!RRC Conn ma/ user is K1L3 )%en RRC can be reDecte! to CJI resource Congestion(). SSSR de.rade due to "ow S1 Si.nalin. Success Rate# Sometimes it %as been obser'e! t%at S1 Signaling SuccessRate !egra!e! !ue to So&t$are up-gra!ation( Cell -AI use! to be impro'e! a&ter =+, Restart(,. SSSR 0e.raded due to -78 issue# :nce RR+ $as replace!< SSSR %as automatically impro'e!(M( Accessibility can also be impro'e! by tuning t%ese &ollo$ing parameters(dl(a&Ret&6h 9 1"(a&Ret&6h of SR+$1 (12)2:2;21ResultsAll Access &ailures in t%e Qamma sector are !ue to one +E $it% t%e IBSI 213M13M0LEPEMM9(Table>ResultsCase ?. Accessibility issues in ERA PhaseRetainAbility RetainAbility/SARR(Session abnormal release rate) :-The ability of a user to retain its requested service once connected for the desired durationT An E-RA1 !rop is counte! eac% time t%e e4o!e1 sen!s an 6E-RA1 RE,EASE I4=ICA)I:47 to t%e BBE< an! $%ene'er t%e BBE sen!s t%e 6E-RA1 Release Comman!7 to t%e e4o!e1 $it% a release cause ot%er t%an =ormal Release2 0etach2 1ser 3nacti'it> and CS fallback tri..ered=e&inition base! on Counter:-SARR"[(AmErabRelAbnormalEnbActAmErabRelBmeAct.5(AmErabRelAbnormalEnbActAmErabRel4ormalEnbAmErabRelBme.]U133 RetainAbility/SARR(Session abnormal release rate) :-Points to note#$E$R+ release can be initiated b> E=+ 9 ((EEnb 3nitiated E$Rab Release#$1! AmErabRel4ormalEnb)! AmErabRelAbnormalEnbAct((E 3nitiated E$Rab Release#$1! AmErabRelBme)! AmErabRelBmeAct1! pmErabRelbnormalEnbctCdt ()%e total number o& abnormal ERA1 releases by t%e e41 per cell !ue to cell !o$n time (manual inter'ention. $it% t%e pre-con!ition t%at t%e Initial Conte/t Establis%ment proce!ure must &irst %a'e been success&ully complete! an! t%at t%ere $as !ata in eit%er t%e +, or =, bu&&er (i(e( acti'e.(Soln# C%ec* :utage report or #luctuation Report()!pmErabRelbnormalEnbct-o ()%e total number o& abnormal ERA1 releases per cell by t%e e41 !ue to %an!o'er e/ecution &ailure an! t%at t%ere $as !ata in eit%er t%e +, or =, bu&&er (i(e( acti'e.(Soln# ACI Collision issue c%ec* (ACI Alanning s%oul! be correct.()%ere s%oul! no ACI re-use $it%in near by cell (1tier parameters? a5Threshold1Rsrp: ;his determines the threshold belo& &hich the ser7in" cell has to be a5Threshold2Rsrp: ;his determines the threshold abo7e &hich the tar"et cell has to be a5Threshold1RsrpAnrDelta: ;his is added to a=;hresholdRsrp a5Threshold2RsrpAnrDelta: ;his is subtracted from a=;hreshold!Rsrp a2ThresholdRsrpPrim: ,etermines the le7el after &hich A= for (*68 should be tri""ered a1ThresholdRsrpPrim: ,etermines if the -# has entered into "ood R* a"ain for the same e7ent is tri""ered? all a!/a= e7ents &ill be cancelled (n order to understand (*68 lets consider the scenario belo& &ith settin"s source cell? 1obility (Preparation/e2ecution)(*68 *-0C;(80A.(;< (A=)Note: If a1threshold is triggered between A2 and A5 trigger (between C and D), then it cancels the UE will not be eas!ring other fre"!encies an#ore$ %o A1 threshold sho!ld be chosen &'the A2 threshold, in order to a(oid this$A C AA/ A,R is trggeredA9 is triggeredA/ (%DHis triggeredA-At this Point the Scource "ets belo& A=anr and tar"et"ets better than a=anr!-henceA= anr &ill be tri""ered. A0R feature add neib in the time b/& PointA and Point C.$- At this Point the scource "ets belo& A=th and tar"et "et better than a=th!-A= condition is met?but (*68 &ont happen since A! is notyet tri""ered. C-At this PointA! is tri""ered since the scource falls belo& the a!thprim.,-At this point A= (*68 ta@es place since A! condition is met as &ell as A= th are also bein" met.1obility (Preparation/e2ecution)(RA; *-0C;(80A.(;< $! *unctionality *unction ,ia"ram ;he (RA; functionality depends primarily on A parameters (assumin" BC disabled)? b2Threshold1Rsrp: ;his determines the threshold belo& &hich the ser7in" .;# cell has t b2Threshold2RscpUtra: ;his determines the threshold abo7e &hich the tar"et -1;S cell a2ThresholdRsrpPrim: ,etermines the le7el after &hich $! for (RA; should be tri""ered a1ThresholdRsrpPrim: ,etermines if the -# has entered into "ood R* a"ain for the sam e7en is tri""ered? all a!/b! e7ents &ill be cancelled (n order to understand (RA; lets consider the scenario belo& &ith settin"s source cell? 1obility (Preparation/e2ecution)(RA; *-0C;(80A.(;< ($!)Note: If a1threshold is triggered between A2 and )2 trigger, then it cancels the A2 re*ort and th eas!ring other U+,% fre"!encies an#ore$ %o A1 threshold sho!ld be chosen &'- d) higher threshold, in order to a(oid this$ %ae a**lies to a1thresholdsec$A

Cb9th9Rsc! is metb9th1Rsr! is metA9th is met Mb9 is triggered.A-At this !oint 53TS cell is better thanb9th9Rsc!-indicates that 53TS cell is already meeting its th for b9.-At this Point the 4TE serving cell is belo& b9th1Rsr!.Also at this !oint the entire b9 condition is met1 but b9 is not triggered since there is no a9 triggered.C-At this !oint a9 is triggered since the scource falls belo& the a9th!rim-b9 is immediately triggered as &ellsince the b9 condition is also satis%air>Digh*9-Scheduling Algo ? *Pro!ortional>%air>4o&-=1RY#,BC11+,)E32E9MLL=1RY#,BC11+,)E32E9MLL01HR.'GC0=9 Hrlando ,+rban, '.1?'.'OO?09=/9.?/1==O.9'.0.?1O9?.'..?79.'1O'.10?==/?/'./...=??9=1RY#,BC11+,)E32E9MLL=1RY#,BC11+,)E32E9MLL21HR.'GC0=9 Hrlando ,+rban, '.??'.?1.1?11O9.7?'O.O9'9../990??'.07=1./.?'.1'.?/???'.00?//.'BRIS#,2911+,)E32E9211BRIS#,2911+,)E32E921111HR70GC00' Hrlando , (sland , 9.OO'.O??/'9'.'.0'9/0.9O'.0010?/..'.'O0?.O0?'.=.=O=99=9.O1O0=/.'BRIS#,2911+,)E32E9211BRIS#,2911+,)E32E921101HR70GC00' Hrlando , (sland , '.==/.9.O/.'/1?../0'?90O?./?/1?/O'?.O/.=1.=9/.'/O779?17.99O=79O7BRIS#,2911+,)E32E9211BRIS#,2911+,)E32E921121HR70GC00' Hrlando , (sland , 9.??9.079''9.=1.==/.1'7?9.77O90.7O9.?0/790O19.99?.O=.=9..OO/...9:R,E#,AE11+,)E32E93P1:R,E#,AE11+,)E32E93P111:R32XC3ME Hrlando4 +rban, 9..O9.7.=0.7=O9.O01=7O7=9.=?91?'7././1?7'0'7.0O'/=.'1/.O?101=/9:R,E#,AE11+,)E32E93P1:R,E#,AE11+,)E32E93P101:R32XC3ME Hrlando4 +rban, 9.1?1.'.O9OO?11.'/'9./1=1..9'1O0=O7.0O07.'.7.?99/'.O97.9O'0/09/:R,E#,AE11+,)E32E93P1:R,E#,AE11+,)E32E93P121:R32XC3ME Hrlando4 +rban, 9.=19.9'.O0'7.9.7'?'97O99..O/7?7O'/.=O01177./.9901===//.?9//00?.:R,,#,1311+,)E32E93L\:R,,#,1311+,)E32E93L\11:R32XC3ML Hrlando4 +rban, '.?'9.7=/O=.?9'..O1.?=1'.=/'O.?71'.1=09=/.19..=/7.179'.'7'?O?==:R,,#,1311+,)E32E93L\:R,,#,1311+,)E32E93L\01:R32XC3ML Hrlando4 +rban, 9.0O1..9.///9O1.7'71O/=11.7'?970771.7?0O7.0=1.'1.O'=9.1.0?.01O7?:R,,#,1311+,)E32E93L\:R,,#,1311+,)E32E93L\21:R32XC3ML Hrlando4 +rban, 9..9.O7.='/'O'...0==10?'.1097.0=='.0=71?O?/9..09='O?/9.?.0=1=9OA,1Y#,1E11+,)E32E91LPA,1Y#,1E11+,)E32E91LP11:R32XC1E2 Hrlando4 +rban, 1.791.1=O=7?'O0.O07O=O9.1.911O17999.?O?77.771.=.9'0OO19.1//O=071A,1Y#,1E11+,)E32E91LPA,1Y#,1E11+,)E32E91LP01:R32XC1E2 Hrlando4 +rban, 9.=.'.1=?O1/OO'.1/7.7/9?'.01.1100O'.'/??'0=79.70100=O?'.97?9711?A,1Y#,1E11+,)E32E91LPA,1Y#,1E11+,)E32E91LP21:R32XC1E2 Hrlando4 +rban, '.7.'.0779=?9'9..79?1.9O'.17197O'..9O.119'.?/=9O.O.'.0???.=.18SB,#,0\11+,)E32E9ML\8SB,#,0\11+,)E32E9ML\11:RP2XC3E9 Hrlando4 1eac%, ?.=/?...O..O'O7.0/O7.1'9/.O'7?1'7.?.=//0/'9'7.97/O909?/./.70.7/98SB,#,0\11+,)E32E9ML\8SB,#,0\11+,)E32E9ML\01:RP2XC3E9 Hrlando4 1eac%, 9.=99.'/OO11099.//???10'9.=O'/'O0=9./'?1?'/19.'9.O./?9.=..9?==18SB,#,0\11+,)E32E9ML\8SB,#,0\11+,)E32E9ML\21:RP2XC3E9Hrlando4 1eac%, '.7'./O?971O/'.0OO'?.0''.'.0011'.'..0='?=0O'.O?=?11O/?.?0/1'/1/ PRE$P/S6 G5 0" SEC6/R 6-R/15-P16 C/(PR3S3/=CAS# studythrou"hputER+S E1tranCellF00 CascadePre$1E Power"imited RatioPost$1E Power"imited Ratio0elta$1E Power"imited RatioPre$0" '. Sec 6hrou.hput(1