12_pcu Ggsn and Sgsn Dim
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Transcript of 12_pcu Ggsn and Sgsn Dim
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66��,QSXW�3DUDPHWHUVSlogan Name UnitMaximum number of attached subscribers MaxNbOfAttMS
Time to attach and activate PDP context all subscribers TimeToAttach min
Number of MO SMS messages per hour and attached subscriber NbOfMoSm 1 / h
Number of MT SMS messages per hour and attached subscriber NbOfMtSm 1 / h
Number of routing area updates per subscriber and hour NbOfRau 1 / h
Number of inter-SGSN routing-area updates per subscriber and hour NbOfInterSgsnRau 1 / h
Number of location area updates per subscriber and hour NbOfLau 1 / h
Number of attach/detach per hour NbOf_Attach 1 / h
Number of attach/detach with change of SGSN per subscriber and hour NbOfAttachCl 1 / h
Frequency of purging one subscriber NbOfPurgedMs 1 / h
Number of A&B type terminals NbOfAB_Ms
Number of busy hour call attempts per subscriber in MSC BHCA_Msc 1 / h
Number of authentication triplets received after one request NbOfTriplets
Slogan Name UnitMaximum number of attached subscribers MaxNbOfAttMS
Time to attach and activate PDP context all subscribers TimeToAttach min
Number of MO SMS messages per hour and attached subscriber NbOfMoSm 1 / h
Number of MT SMS messages per hour and attached subscriber NbOfMtSm 1 / h
Number of routing area updates per subscriber and hour NbOfRau 1 / h
Number of inter-SGSN routing-area updates per subscriber and hour NbOfInterSgsnRau 1 / h
Number of location area updates per subscriber and hour NbOfLau 1 / h
Number of attach/detach per hour NbOf_Attach 1 / h
Number of attach/detach with change of SGSN per subscriber and hour NbOfAttachCl 1 / h
Frequency of purging one subscriber NbOfPurgedMs 1 / h
Number of A&B type terminals NbOfAB_Ms
Number of busy hour call attempts per subscriber in MSC BHCA_Msc 1 / h
Number of authentication triplets received after one request NbOfTriplets
038 13 - EN/LZU 108 5402 Rev A GRPS Dimensioning and Performance Workshop
Gr Attach Sent Received Frequency1) Authentication 81 245 MaxNbOfAttMS * (NbOfAttachCI / 3600) / NbOfTriplets
Update location 128 75 MaxNbOfAttMS * (NbOfAttachCI / 3600)Insert Subscriber Data 82 273 MaxNbOfAttMS * (NbOfAttachCI / 3600)
or2) Cancel Location 105 119 MaxNbOfAttMS * (NbOfAttachCI / 3600)
3) Purge MS- 119 105 MaxNbOfAttMS * (NbOfAttachCI+NbOfPurgedMs / 3600)
Detach- 0 0 -
Inter-SGSN Routing-Area roaming4) Authentication 81 245 MaxNbOfAttMS * (NbOfInterSgsnRau / 3600) / NbOfTriplets
Update location 128 75 MaxNbOfAttMS * (NbOfInterSgsnRau / 3600)Insert Subscriber Data 82 273 MaxNbOfAttMS * (NbOfInterSgsnRau / 3600)
or5) Cancel Location 105 119 MaxNbOfAttMS * (NbOfInterSgsnRau / 3600)
Gr Attach Sent Received Frequency1) Authentication 81 245 MaxNbOfAttMS * (NbOfAttachCI / 3600) / NbOfTriplets
Update location 128 75 MaxNbOfAttMS * (NbOfAttachCI / 3600)Insert Subscriber Data 82 273 MaxNbOfAttMS * (NbOfAttachCI / 3600)
or2) Cancel Location 105 119 MaxNbOfAttMS * (NbOfAttachCI / 3600)
3) Purge MS- 119 105 MaxNbOfAttMS * (NbOfAttachCI+NbOfPurgedMs / 3600)
Detach- 0 0 -
Inter-SGSN Routing-Area roaming4) Authentication 81 245 MaxNbOfAttMS * (NbOfInterSgsnRau / 3600) / NbOfTriplets
Update location 128 75 MaxNbOfAttMS * (NbOfInterSgsnRau / 3600)Insert Subscriber Data 82 273 MaxNbOfAttMS * (NbOfInterSgsnRau / 3600)
or5) Cancel Location 105 119 MaxNbOfAttMS * (NbOfInterSgsnRau / 3600)
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*V�66��GLPHQVLRQLQJ��RQO\�IRU�*61�5����Gs Location Update Sent Received Frequency1) Location Update 95 78 NbOfAB_Ms / (TimeToAttach * 60)
TMSI-Reallocation completed 71 0 NbOfAB_Ms / (TimeToAttach * 60)
2) AttachLocation Update 95 78 NbOfAB_Ms * (NbOf_Attach / 3600)TMSI-Reallocation completed 71 0 NbOfAB_Ms * (NbOf_Attach / 3600)
3) Detach (MS-initiated)IMSI detach 85 0 NbOfAB_Ms * (NbOf_Attach / 3600)GPRS detach 85 0 NbOfAB_Ms * (NbOf_Attach / 3600)
4) Location Area UpdateLocation Update 95 78 NbOfAB_Ms * (NbOfInterSgsnLau / 3600)TMSI-Reallocation completed 71 0 NbOfAB_Ms * (NbOfInterSgsnLau / 3600)
5) PagingPaging Request 0 88 NbOfAB_Ms * (BhcaMsc / 3600)
Gs Location Update Sent Received Frequency1) Location Update 95 78 NbOfAB_Ms / (TimeToAttach * 60)
TMSI-Reallocation completed 71 0 NbOfAB_Ms / (TimeToAttach * 60)
2) AttachLocation Update 95 78 NbOfAB_Ms * (NbOf_Attach / 3600)TMSI-Reallocation completed 71 0 NbOfAB_Ms * (NbOf_Attach / 3600)
3) Detach (MS-initiated)IMSI detach 85 0 NbOfAB_Ms * (NbOf_Attach / 3600)GPRS detach 85 0 NbOfAB_Ms * (NbOf_Attach / 3600)
4) Location Area UpdateLocation Update 95 78 NbOfAB_Ms * (NbOfInterSgsnLau / 3600)TMSI-Reallocation completed 71 0 NbOfAB_Ms * (NbOfInterSgsnLau / 3600)
5) PagingPaging Request 0 88 NbOfAB_Ms * (BhcaMsc / 3600)
NbOfAB_Ms * (NbOf_Attach / 3600)NbOfAB_Ms * (NbOf_Attach / 3600)
038 13 - EN/LZU 108 5402 Rev A GRPS Dimensioning and Performance Workshop
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Gd SMS Sent Received FrequencyMobile Originating 219 101 MaxNbOfAttMS * (NbOfMoSm / 3600)Mobile Terminating 101 219 MaxNbOfAttMS * (NbOfMtSm / 3600)
Gd SMS Sent Received FrequencyMobile Originating 219 101 MaxNbOfAttMS * (NbOfMoSm / 3600)Mobile Terminating 101 219 MaxNbOfAttMS * (NbOfMtSm / 3600)
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*V�,QWHUIDFH�XVDJHMobiles Gs-interface usageClass A
No speech connection – combined Routing Area / Location Area update to the SGSN which will inform the MSC through the Gs-interface
Speech connection – Routing Area update in SGSN only, in case of Hand-Over the MSC is informed through the A-interface.
Class BNo speech connection – combined Routing Area / Location Area update to the SGSN which will inform the MSC through the Gs-interface
Speech connection – In case of Hand-Over the MSC is informed through the A-interface.
Class CNo speech connection – Routing Area update to the SGSN
Speech connection – In case of Hand-Over the MSC is informed through the A-interface.
Mobiles Gs-interface usageClass A
No speech connection – combined Routing Area / Location Area update to the SGSN which will inform the MSC through the Gs-interface
Speech connection – Routing Area update in SGSN only, in case of Hand-Over the MSC is informed through the A-interface.
Class BNo speech connection – combined Routing Area / Location Area update to the SGSN which will inform the MSC through the Gs-interface
Speech connection – In case of Hand-Over the MSC is informed through the A-interface.
Class CNo speech connection – Routing Area update to the SGSN
Speech connection – In case of Hand-Over the MSC is informed through the A-interface.
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038 13 - EN/LZU 108 5402 Rev A GRPS Dimensioning and Performance Workshop
General Packet Radio ServicesGeneral Packet Radio Services
Dimensioning Example
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038 13 - EN/LZU 108 5402 Rev A GRPS Dimensioning and Performance Workshop
Subscriber Forecast (subs)Total users 2 000 000GPRS users (10%) 200 000Simultaneously Attached Users (50%) 100 000# of PDP-context (1 per SAU) 100 000
,QSXW
Geographical DistributionWAP Town 60%High Speed City 13%Packet Data Village 27%
038 13 - EN/LZU 108 5402 Rev A GRPS Dimensioning and Performance Workshop
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Traffic ModelApplication data (bit/s/BH/user) 200Peak data load factor 3
Number of BSCsWAP Town 8High Speed City 4Packet Data Village 4
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n &DOFXODWH�QXPEHU�RI�*6/�GHYLFHV�QHHGHG�SHU�UHJLRQ�
n &DOFXODWH�QXPEHU�RI�533V�UHTXLUHG�
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(2000000 * 10% * 50% * 60%) * (200 bits/s) * (3) * (1.1) 7000 bits/s
= 5658 GSL devices
=
=
GSL devices required 5658 GSL configuration per RPP 140
# RPPGSL = = = 41
=
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(2000000 * 10% * 50% * 60%) * (200 bits/s) * (3) * (1.20) 64 kbits/s * 80%
= 844 Gb timeslots
=
=
GPRS subs * data load per sub * peak factor * Gb OH64 kbits/s * Gb link load
Gb timeslots required 844 Gb configuration per RPP 21= = = 41# RPPGb
=
(FR+BSSGP)
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n 'HWHUPLQH�QXPEHU�RI�533V�UHTXLUHG�SHU�%6&�
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=
=# RPPBSC =
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0
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RPP-0 (100 GSL, 31 Gb TS) RPP-1a (107 GSL)
RPP-2 (100 GSL, 31 Gb TS) RPP-1b (43 GSL) RPP-3a (64 GSL)
RPP-4 (100 GSL, 31 Gb TS) RPP-3b (86 GSL) RPP-5a (21 GSL)
RPP-5b (87 GSL, 13 Gb TS)
038 13 - EN/LZU 108 5402 Rev A GRPS Dimensioning and Performance Workshop
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GPRS subs * data load per sub * peak factor# bytes per packet * 8
#Packets on Gb =
=
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=
= 25 000 packets/s
New Telecom World
038 13 - EN/LZU 108 5402 Rev A GRPS Dimensioning and Performance Workshop
Dimension considering #packets (continued):
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n &*61���SDFNHWV����������� ������������������ ���&*61
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� &*61���SDFNHWV��������� ���������������� � ��&*61
���&*61VEnough to meetrequired capacity demandResult
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038 13 - EN/LZU 108 5402 Rev A GRPS Dimensioning and Performance Workshop
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n Number of BSCs connected to SGSN
n Number of E1 required to connect to other nodes
n Amount of C7 terminals for the Gs, Gd and Gr I/f
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