GPRS UMTS in the Core Network
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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
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Topic Covered
GPRS System Overview Mobility Management Session Management QoS Roaming Implementation in the Core Network
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Why Data Services ? Technology Roadmap & Trends
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Why Data Services ? change the way of communication & expressing yourself
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Network Architecture
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PS Core Function Overview - SGSN
Mobility Management (MM) Session Management (SM) Payload Handling Charging QoS Security
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SGSN Hardware
Example of SGSN HardwareHuawei & Ericsson SGSN
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SGSN Hardware – E1/T1 Board
Example of SGSN Board
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PS Core Function Overview - GGSN
Session Management (SM) Payload Handling Charging QoS Security RADIUS Support
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GGSN Hardware
Example of GGSN Hardware – Ericsson GGSN
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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
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1. MS has to be attached to network
How to access the Internet ?
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Attach request
How to access the Internet ?
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2. MS has to have the IP address
How to access the Internet ?
3. MS access the web page
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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)
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QoS
UMTS QoS R99 based on 3GPP TS 23.107
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QoS
Subscribed APN QoS send by HLR on MAP insertSubscriberData message
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QoS
Subscribed APN QoS in HLR
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Thank You