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TOPICS
 GPRS

overview.
 GPRS Architecture.
 GPRS Flow.
 TDC Implementation.
GPRS OVERVIEW
 GPRS

(General Packet Radio Service) is a
packed based communication service that
allows data to be sent a...
Salient Features of GPRS
 Always
 New

on Connectivity.

and Better Application.

 Reduced
 Billing

GSM operator Cost...
Services
 Multimedia

messaging service (MMS).

 Internet

applications for smart devices
through wireless application p...
GPRS Terminals
 Class

A
MS supports simultaneous operation of
GPRS and GSM services.
 Class B
MS able to register wit...
GPRS Architecture
13. Cancel Location
20. Cancel Location
14. Cancel Location Ack

21. Cancel
Location Ack

12. Update Location
15. Insert S...
PDP
Context
Activation

Old
SGSN

Old MSC /
VLR

HLR

MSC / VLR

2. DNS Query
(APN)

Mobile
Station
(MS)

1. Activate PDP ...
CDR FIELDS USED FOR CHARGING
SGSN
GGSN

GGSN, Charging ID
Record Sequence Number
IMSI, IMEI
APN
PDP Type
Opening Time, Dur...
CAUSES FOR CDR CLOSURE
PDP Release

Volume
(MB)

Tariff
Change

3.0
Volume
limit

2.5
2.0

CDR 1

CDR 4

1.5
CDR 3

1.0
CD...
SPLITTING OF CDRS

Off-Peak

Peak

Off-Peak

PDP Context

Merged CDR

Merged CDR

Merged CDR
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Gprs

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Gprs

  1. 1. TOPICS  GPRS overview.  GPRS Architecture.  GPRS Flow.  TDC Implementation.
  2. 2. GPRS OVERVIEW  GPRS (General Packet Radio Service) is a packed based communication service that allows data to be sent and received across a mobile telephone network.  GPRS  GPRS uses Packed Switch Data. is a step toward 3G and is often referred as 2.5G.
  3. 3. Salient Features of GPRS  Always  New on Connectivity. and Better Application.  Reduced  Billing GSM operator Cost. based on volume of data transferred.
  4. 4. Services  Multimedia messaging service (MMS).  Internet applications for smart devices through wireless application protocol.  Push to talk.
  5. 5. GPRS Terminals  Class A MS supports simultaneous operation of GPRS and GSM services.  Class B MS able to register with the network for both GPRS & GSM services simultaneously. It can only use one of the two services at a given time.  Class C - MS can attach for either GPRS or GSM.
  6. 6. GPRS Architecture
  7. 7. 13. Cancel Location 20. Cancel Location 14. Cancel Location Ack 21. Cancel Location Ack 12. Update Location 15. Insert Subscriber Data HLR 16. Insert Subscriber Data Ack Old MSC / VLR 26. GMM Attach Accept 9. IMEI Response I 8. IME st Reque SGSN ns e s po Re t t h. ues . Au S) 7 Req E on (SR cati enti ) uth 6. A (RAND se pon Res ty enti 5. Id est equ yR t enti st C) 4. Id RA q ue e C, ch R , LA Atta MNC MM C, 1. G I, MC S (TM Radius Server GGSN n Mobile Station (MS) o ati oc 23. Ins. Sub Data Ack 17. Update Location Ack L ate pd .U k 24 Ac 2 (T . Id M en 3 SI tit (IM . Id ) yR en SI ti eq ) ty ue R st es po 27. G ns MM A e Com ttach plete 22. Insert Subscriber Data Old SGSN 19. Update Location GPRS Combined Attach Procedure 18. Location Update Request 25. Location Update Accept 28. TMSI Reallocation Complete 10 . IM E Re I Ch qu e 11 es ck . IM t E Re I Ch sp on eck se DHCP Server MSC / VLR DNS Server EIR
  8. 8. PDP Context Activation Old SGSN Old MSC / VLR HLR MSC / VLR 2. DNS Query (APN) Mobile Station (MS) 1. Activate PDP Context (APN) SGSN 3. DNS Response (GGSN IP Address) DNS Server 10. Activate PDP Context Accept 4. Create PDP context request (PAP, CHAP, PDP request) 9. Create PDP context Response 7. DHCP Address Request 8. DHCP Address Response GGSN 5. Radius Authentication Request (PAP, CHAP) 6. Radius Authentication Response DHCP Server Radius Server
  9. 9. CDR FIELDS USED FOR CHARGING SGSN GGSN GGSN, Charging ID Record Sequence Number IMSI, IMEI APN PDP Type Opening Time, Duration Closing Reason Diagnostics List of data volumes Location Area Code Routing Area Code Cell ID SGSN Change
  10. 10. CAUSES FOR CDR CLOSURE PDP Release Volume (MB) Tariff Change 3.0 Volume limit 2.5 2.0 CDR 1 CDR 4 1.5 CDR 3 1.0 CDR 2 0.5 17 18 19 20 Time Limi t 21 Time (Hrs) Combined
  11. 11. SPLITTING OF CDRS Off-Peak Peak Off-Peak PDP Context Merged CDR Merged CDR Merged CDR

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