GPRS/UMTS in the Core Network

Free IT Saturday Lesson – Comlabs USDI ITB April 23rd 2011

Prepared By : Mochamad Irwan HarahapSr. Engineer – Telco Implementation VAS, PT XL Axiata

Topic Covered

GPRS System Overview Mobility Management Session Management QoS Roaming Implementation in the Core Network

Why Data Services ? Technology Roadmap & Trends

Why Data Services ? change the way of communication & expressing yourself

Network Architecture

PS Core Function Overview - SGSN

Mobility Management (MM) Session Management (SM) Payload Handling Charging QoS Security

SGSN Hardware

Example of SGSN HardwareHuawei & Ericsson SGSN

SGSN Hardware – E1/T1 Board

Example of SGSN Board

PS Core Function Overview - GGSN

Session Management (SM) Payload Handling Charging QoS Security RADIUS Support

GGSN Hardware

Example of GGSN Hardware – Ericsson GGSN

Access Point Name (APN) is a part of GPRS subscription data which is stored in Home Location Register (HLR) and which is transferred to the SGSN upon the activation of a GMM-Context.

APN has to be defined in GGSN too. APN is split into two parts :

Network Identifier : Mandatory Example : www.xlgprs.net

Operator Identifier : Optional, except for inter-PLMN roaming Example : mnc011.mcc510.gprs

Max APN Length : 100 octets. Max Network Identifier Length : 63 octets Max Operator Identifier : 100 – Network Identifier Length

There are wildcard APN (*) on HLR. Which can allow user to not request a specific APN to do PDP Context Activation

APN

1. MS has to be attached to network

How to access the Internet ?

Attach request

How to access the Internet ?

2. MS has to have the IP address

How to access the Internet ?

3. MS access the web page

QoS

The GPRS QoS functions, based on Release 99 QoS, including the following: Guaranteed Bit Rate (GBR) admission control Packet Flow Control (PFC) Overload Protection (OLP) Maximum Bit Rate (MBR) policing 3GPP-to-Internet Protocol (IP) QoS mapping rules Queueing, scheduling, and flow control (GSM)

Sample of Optional QoS

High Speed Downlink Packet Access Support (HSDPA Support)

QoS

UMTS QoS R99 based on 3GPP TS 23.107

QoS

Subscribed APN QoS send by HLR on MAP insertSubscriberData message

QoS

Subscribed APN QoS in HLR

Thank You