FACH Optimization by FACH Bandwidth Expansion

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FACH Optimization by FACH Bandwidth expansion To reduce FACH Congestion

Radian (00!0"##$

O%er%iew

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Problem & High FACH congestion since many s martphone in the mar'et growing

rapidy) FACH FACH Congestion has become new issue o* congestion+ 2016-06-22

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Description : For high FACH Congestion a*ter expand ! nd ,CC-CH we can expand

FACH Bandwidth by re.con*ig the ,CC-CH -arameter to get /" bps

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Background :

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Changing ,otFormat) CTFC 1 TB2umber can bring si gni*icant

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impro%ement as tabe *or cacuation beow & Based on the ,preading Factor (,F$) the number o* piot bits (2piot$ and the number o* Transport Format Combination 3ndicator bits (2TFC3$) the sot *ormat o* a ,CC-CH can be determined+ For their

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reationships) re*er to the *oowing tabe&  2ote that i* TFC3 bits are not present) 4iscontinuous Transmission

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(4T5$ shoud be used instead *or the TFC3*ied The number o* Transport Format Combinations (TFCs$ is i mited by the parameter CTFC Length of TFCS + CTFC Length of TFCS  is hard to bemodi*ied a*ter the ,CC-CH is set up+ The number o* TFCs

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shoud be panned be*orethe ,CC-CH is set up+ 3n a ce)the maximum number o* ,CC-CHs bearing CO66O2 channe is two)and there is ony one ,CC-CH bearing 6CCH channe+

2016-06-22

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Action :

 by using ,CC-CH con*iguration *or FACH beow) we can *urther increase FACH Bandwidth to /" bps & 47A 8C799& C79934:55555; 47A 8,CC-CH& C79934:55555) -H; R6= 8FACH4<2TF,& C79934:55555) TRCH34:>) R9C,3?7:@"; R6= 8FACH4<2TF,& C79934:55555) TRCH34:) R9C,3?7:"0; R6= 8FACH& C79934:55555) TRCH34:>; R6= 8FACH& C79934:55555) TRCH34:; R6= 8,CC-CH& C79934:55555) -H; A44 8,CC-CHTFC& C79934:55555) -H) RAT76ATCH32ATTR:!!0) TOAD,:) TOAD7:@0) 6A5FACH-OD7R:0) CHCO432T<-7:CO2=O98T3O2A9;

2016-06-22

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A44 8FACH& C79934:55555) -H) R9C,3?7:@") TF,286B7R:4) TB286B7R@:0) TB286B7R!:@) TB286B7R:!; A44 8FACH4<2TF,&C79934:55555) TRCH34:) R9C,3?7:"0) TF,286B7R:4) TB286B7R@:0) TB286B7R!:@) TB286B7R:!; A44 8FACH9OCH& C79934:55555) TRCH34:>; ACT 8,CC-CH& C79934:55555) -H
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Result :

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2016-06-22

FAC Band!idth increase FAC Congestion reduce

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2016-06-22

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