ul ce utilization issue after srb over hsupa 20140828

8/9/2019 UL CE Utilization Issue After SRB Over HSUPA 20140828

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Case Title UL CE Utilization Issue after SRB over HSUPA

Phenomenon

Description:

1. After the SRB over HSUPA feature deployent! the Uplin" CE #on$estion

happened on R%C side and the Servi#e CSSR is ipa#ted.

&. After the feature deployent the R%C and %odeB CE utilization #han$ed ! 'ut

(ith the different trend. )he R%C side CE used in#rease o'vious (hile the %odeB

side de#reased sli$htly.

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uthor CHE% 0an$ Work I **1*1*2

!"#rt$!%t 3an %IS &ro'u(t )*%! 4C56A R%P7R%3

+"'#t! ,*$! &*1,*8,&8 &ro'u(t -!r.*o% 9**R*1-E%0C**SPC-/*

""ro-!r


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)he #ustoer as"s a'out the reason.

Alarm

Information

%3%E

Cause

Analysis

1. After the 5ynai# CE ena'led! the CE utilization e#hanis is different 'et(een

R%C and %odeB. %odeB (ill re#y#le the CE dynai#ally (hile the adission CE

nu'er (ill never #han$e even %odeB re#y#le the CE. So there is no relationship

:the sae trend; 'et(een the R%C #ounter VS.LC.ULCreditUsed.Mean and the

%odeB #ounter VS.LC.ULMean.LicenseGroup.Shared.

&. )he R%C side VS.LC.ULCreditUsed.Mean in#rease and the reason is there is

e#hanis differen#e for SRB over 5CH and SRB over HSUPA.


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5etailed des#ription as follo(in$!

1. )he si$nalin$ part and the user part (ill used :share; the sae E5CH for SRB

over HSUPA user= If there e>ist SRB in the ))I! )BS?SRB is used to$ether to

#ount the CE #onsuption@ if no SRB e>ist! only the )BS is used.

&. )he Si$nalin$ part (ill #onsue one separate CE (ithout #onsiderin$ SRB for

SRB over 5CH user. )he a#tual CE utilization nu'er is CE used for )BS plus 1.

6ost of the tie (e (ill use )BS to #ount the CE utilization nu'er dire#tly due to

the lo( ))I ratio for SRB over HSUPA #ontainin$ SRB data.

)he #urrent #onfi$uration as follo(in$

fun#tion status

HSUPA &6S 3


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Soe "ey points need 'e entioned for this ta'le!

1. )he first #olun is used for 'it rate adission (hile the se#ond is for 6BR

adission.

&. )his ta'le is ust for user plan CE utilization. %o additional CE (ill 'e

#onsued if SRB over HSUPA (hile 1 additional CE (ill 'e #onsued for

SRB over 5CH.

2. If there is no at#hin$ for servi#e adission 'it rate in this ta'le! the CE

utilization nu'er is $ot 'y the up at#hin$ rules.

)he follo(in$ 0BR #onfi$uration for the R%C*

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A##ordin$ to the a'ove rules!

1. (hen /"'ps 0BR is #onfi$ured! 6AD:one RLC P5U 'it rate! 0BR;

6AD12&"'ps!/"'ps2/"'ps

)hen the CE #onsuption nu'er is=


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After that the Con$estion desappeared and the Servi#e CSSR falla#" to noral level

Suggestions

and

summary

)he en$ineer should 'e failiar (ith the feature do#uent and (hen the pro'le happens!

the ri$ht feature #an 'e found to solve the issue.

Attachments

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ul ce utilization issue after srb over hsupa 20140828

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