IRAT optimization

IRAT optimization

Keywords Physical channel fail; PenaltyTime; Pe naltyTime; TARGETRAT TARGETRATCSTHD CSTHD

Abstract The main reason of Inter RAT HO fail is physical channel fail, so do some penalty of  physical fail can increase the IRAT HO sccess rate!

Situation CS and PS Inte Interr RAT RAT hand o"er o"er scc scces ess s rate rate not not #ood #ood eno eno#h, #h, need do some some optimi$ation to increase the inter RAT hand o"er sccess rate in %ahore! %a hore!

Task  Analyses the performance data to find the reason of inter RAT fail& 'ind the main reason is physical channel fail, it more than ()*

 Analysis the detail data to find the top +G cellstop -G cell and top nei#h.or relations, and Top -G cell cell let let the the GS/ GS/ part part to chec chec0 0 the the reas reason on and opti optimi mi$a $ati tion on the cell cell  con#estion and hard1are isse Optimi$ation the +G physical channel fail：  2、 Top Top +G cell modified th e InterRatPhyCh'ail3m from + to 2 to let the specific 4E not try Inter RAT HO too mch time after 'ail! -、 /odified the PenaltyTime'orPhyCh'ail from +) to 5), let the fail 4E 1ait lon#er 

time not try to re6est Inter RAT hand o"er! +、 /odified the TARGETRATCSTHD form 27 to -7, let the se choose the .etter  -G cell to decrease the fail de to the -G si#nal is not #ood to #et the si#nalin# information! Optimi$ation the nei#h.or relation ： choose the fail time and fail rate hi#h nei#h.or   relation ， modified the CIOOffset to let the 4E hard to choose this nei#h.or cell as tar#et cell! Chec0ed the reslt of optimi$ation and optimi$ation the parameter a#ain，do it fe1 times, 0eep the parameter is sit 1ith the correct net1or0 states!

Result: Implemented the 8O in 27th 9an, and the top cell inter RAT HO fail of physical channel fail is decrease&

The Inter RAT HO sccess rate is increased 1hen the 8O Implemented!

Suggestion or Review De to the 1ireless sitation chan#e, the Inter RAT hand o"er parameter need modified 1ith the sitation chan#e, to let the 4E choose the .est nei#h.or cell and need to remo"e the inflence of special 4E al1ays fail 1hen HO!