measurement ggsn

8/11/2019 Measurement Ggsn

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6 Measurements related to the GGSN6.1 Session Management6.1.1 Session establishmentsThe performance counters presented in this subclause are mainly intended to:

- monitor the session establishment success at the GGSN level

- identify the main causes for GGSN originating session establishment failures- and study the repartition of the different traffic classes within session establishment attempts and successes.

These counters are associated to GPRS Tunnelling Protocol signalling GTP-! for the control plane"# between the

SGSN and the GGSN# and defined in TS $%.&'& and TS $(.&'& )*(+.

The figure below# from TS $%.&' recalls the se,uence of messages echanged for a primary PP contet activationand a subse,uent secondary PP contet activation and details the events triggering the update of the counters

values.

Figure from TS 23.060:The three measurement types defined in the clause '.*.* are sub/ect to the 0$ out of % approach0.1- SMActivate PDP Context e!uest2- Radio Access Bearer SetupPrimar" PDPcontextactivation#- GTP Create PDP Context e!uestincrement SM.AttActPd$Ctxt.%&ra''icClass(.%A) $riorit"(

#- GTP Create PDP Context es$onseincrement SM.SuccActPd$Ctxt.%&ra''icClass(.%A) $riorit"(*- SMActivate PDP Context Acce$t+- SMActivate Secondar" PDP Context e!uest6- Radio Access Bearer SetupSecondar"PDP contextactivation,- GTP Create PDP Context e!uestincrement SM.AttActPd$Ctxt.%&ra''icClass(.%A) $riorit"(,- GTP Create PDP Context es$onseincrement SM.SuccActPd$Ctxt.%&ra''icClass(.%A) $riorit"(- SMActivate PDP Context Acce$tMS TRA! SGS! GGS!

3GPP

Re"ease # $2% 3GPP TS 32.&03 '#.$$.0 (200#-06)

6.1.1.1 Attem$ted session establishmentsa" This measurement provides the number of attempted session establishments. This measurement is split into

subcounters per traffic class and allocation1retention priority or precedence class" indicated in the 2oS profile.

b" !!c" 3n receipt of a !R45T4 PP !3NT46T R4274ST message by the GGSN# the relevant measurement is

incremented according to the traffic class and allocation1retention priority or precedence class" indicated in the

message. 8n case of a PP contet activated with R(91( 2oS attributes# the fields traffic class andallocation1retention priority used for screening are derived from delay class and precedence class respectively# as

ruled in TS $%.*&9. See also TS $;.&& )*


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i" This measurement is mainly dedicated to 3perator >usiness and Bendor Performance =odelling communities.

6.1.1. Success'ul session establishmentsa" This measurement provides the number of sessions successfully established. This measurement is split into

subcounters per traffic class and allocation1retention priority or precedence class" given in the 2oS profile of the

related PP contet.

b" !!

c" The relevant measurement is incremented on transmission by the GGSN of a !R45T4 PP !3NT46TR4SP3NS4 message sent with cause 0Re,uest 5ccepted0# according to the traffic class and allocation1retention

priority of the related PP contet. 8n case of a PP contet activated with R(91( 2oS attributes# the fields

traffic class and allocation1retention priority used for screening are derived from delay class and precedence class

respectively# as ruled in TS $%.*&9. See also TS $;.&& )*usiness and Bendor Performance =odelling communities.

6.1.1.# /ailed session establishmentsa" This measurement provides the number of session establishment failures. This measurement is split into

subcounters per failure cause.b" !!c" 3n transmission by the GGSN of a !R45T4 PP !3NT46T R4SP3NS4 message indicating a PP contetactivation failure# the measurement is incremented according to the failure cause. Possible causes are included in

TS $(.&'& )*(+. The sum of all supported per cause measurements should e,ual the total number of PP contet

activation failures.

d" 4ach measurement is an integer value. The number of measurements is e,ual to the number of causes supported.e" The measurement name has the form S=.Aail5ctPdp!tt.Causewhere Cause identifies the failure cause.

f" GgsnAunction

g" Balid for pacCet switched traffich" !3=>i" This measurement is mainly dedicated to 3perator =aintenance and Bendor Performance =odellingcommunities.

6.1. Net0or-initiated session establishmentsThe performance counters presented in this subclause focus on networC initiated PP contet activation procedure#

thatallows the GGSN to initiate the activation of a PP contet on receipt of a PP P7 on the Gi interface. The

counters

proposed are mainly intended to

- monitor the signalling echanged between the @?R and the GGSN during this procedure- and monitor the success rate for networC-initiated session establishments. 8t has to be noted that measurements

proposed enable to distinguish between the establishment failures occurring before and after the SGSN has


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sent the contet activation re,uest to the =S.

These counters are associated to the =obile 5pplication Part =5P" protocol layer defined in TS $(.&&$" and to

GPRS

Tunnelling Protocol signalling GTP-! for the control plane"# between the SGSN and the GGSN defined inTS $(.&'& )*(+".

The figure below# from TS $%.&' recalls the se,uence of messages echanged for a networC initiated PP contet

activation and details the events triggering the update of the counters values.3GPP

Re"ease # $30 3GPP TS 32.&03 '#.$$.0 (200#-06)1- PDP PD2- MAPSend outing 3n'o 'or GPSincrement SM.Sendout3n'oG$rs4lre!- MAPSend outing 3n'o 'or GPS Acincrement SM.SuccSendout3n'oG$rs4lrs$#- GTPPD2 Noti'ication e!uestincrement SM.AttActPd$CtxtNet0#- GTPPD2 Noti'ication es$onseincrementSM./ailActPd$CtxtNet0.%Net0Cause( i'*- SM e!uest PDP Context Activation t t t d+bis- GTPPD2 Noti'ication e5ect e!uestincrement SM./ailActPd$CtxtNet0.%Cause(+- SMActivate PDP Context e!uest6- GTPCreate PDP Context e!uest,- GTPCreate PDP Context es$onse- SMActivate PDP Context Acce$t

MS TRA! SGS! +,R GGS!Figure from TS 23.06:

6.1..1 Number o' routing in'ormation re!uests 'or net0or-initiated sessionestablishment attem$tsa" This measurement provides the number of DSend Routing 8nfo for GPRS E re,uests sent to the @?R.b" !!c" The measurement is incremented on transmission by the GGSN of a =5P S4N R37T8NG 8NA3 A3R GPRSmessage to the @?R. See TS $%.&'& and TS $(.&&$.

d" 8ntegere" S=.SendRout8nfoGprs@lrRe,f" GgsnAunction

g" Balid for pacCet switched traffic

h" !3=>

i" This measurement is mainly dedicated to Bendor Performance =odelling community.

6.1.. Number o' routing in'ormation success'ul res$onses 'or net0or-initiatedsession establishment attem$tsa" This measurement provides the number of D Send Routing 8nfo for GPRS E response messages received from@?R indicating a positive outcome.

b" !!c" The measurement is incremented on receipt by the GGSN of a =5P S4N R37T8NG 8NA3 A3R GPRS

response message containing an SGSN address# which indicates a successful outcome. See TS $%.&'& and TS

$(.&&$.

d" 8nteger

e" S=.SuccSendRout8nfoGprs@lrRspf" GgsnAunction

g" Balid for pacCet switched traffic

measurement ggsn

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