Mobile Communication Core Network - TRAINING

Contents at a Glance

Since the advent of Mobile internet technologies, the users and their demand for the data access with high rate has been growing exponentially.
This course explores the evolution of all IP core network named Evolution Packet Core (EPC).
EPC is developed by 3GPP under work item System Architecture Evolution (SAE). Various aspects of the EPC which includes its architecture, interworking with other radio access technologies e.g. GSM/ WCDMA or CDMA, major services and functions are included, in a brief manner, are included in this study project.

Course Description

Due to widespread adoption of mobile communications devices and increasingly high throughput capacity of cellular networks, Third-Generation (3G) and Long Term Evolution (LTE) are becoming ever more popular. Millions of smart phones with 3G capabilities are sold every year and used for mostly browsing the Internet. Hence, mobile operators have been heavily investing in their packet switched networks to meet customer demand and stay ahead in the market. The widespread use of broadband mobile Internet bring along also some IP based threats such as the Denial of Service (DoS) attacks, botnets and malwares. In this course, we perform DoS and flooding attacks on 3G mobile networks and measured their effect on the most critical elements of a network such as the Radio Network Controller (RNC) and the Serving GPRS Support Node (SGSN) devices. We carried out our experiments on a real mobile network, not just a simulation environment, and hence our findings depict a realistic picture of the vulnerabilities existent in 3G mobile networks. We propose alternative solutions to avoid these vulnerabilities and mitigate the issues raised.
Mobile communication is becoming commonplace and playing an irreplaceable role in our lives. It is facilitating not only voice communication but also high speed data communication. Millions of smart phones with 3G capabilities are sold every year and mostly used for browsing the Internet, banking applications and messaging, resulting in the expectations for the data revenue of mobile cellular network operators to exceed their voice revenue.
Especially, with the availability of the high data throughput in 3G, Long Term Evolution (LTE) and LTE-Advanced mobile networks, many subscribers communicate more data than voice. The trend is that data communication, compared to voice communication, is dominating the mobile market.
It is expected that mobile revenue will double by 2016, but traffic will increase tenfold due to increasing demand for mobile data communication . As a result, in mobile cellular networks, data communication revenue is forecasted to exceed voice communication revenue. Therefore, mobile operators capitalize on their data services and, in addition to being mobile voice carriers, mobile core networks tend to be used as Internet Service Providers (ISP).
The investments made by mobile carriers on their IP based infrastructures and services are motivated mostly by their subscribers’ increasing demand for mobile data communication. The acceptance of mobile networks as a venue for Internet access brings along new IP based threats on mobile core networks.
Previous studies investigated several vulnerabilities in mobile 3G networks. Some attacks on 3G networks and showed how unwanted traffic results in resource wastage. Also four different attack models specific for cellular networks and evaluated their results for a more robust network design perspective.
Investigation attacks on the paging channel and presented their findings through simulations. Valuable contributions to the field by discussing the vulnerabilities on cellular networks in detail and proposing countermeasures.
The randomization method to prevent DoS attacks on 3G cellular networks, again using simulations. Several DoS attacks on 3G networks were realized.

Mobile Communication Core Network - OUTLINES


A short history of wireless communication

Introduction to Evolved packet core networks (EPC)

Overall cellular system architecture
Background of development of EPC
Objectives set by 3GPP for EPC

EPC architecture

Serving gateway (SGW)
Packet data network gateway (PDN-GW)
Home subscriber server (HSS)

Interworking with 2G and 3G technologies

Interworking between LTE and GSM or WCDMA networks
Interworking with LTE and CDMA networks

Major services of EPC

Data services
Voice services
Message services

Major Functions of EPC

Authentication and security
Policy and charging control and QoS
Packet routing
Mobility management
IP address allocation
discusses the basic architecture of a 3G network and Section 3 analyzes possible threats in 3G as well as LTE networks
attacks exploiting paging vulnerabilities on 3G networks and observed their negativeeffects
countermeasures against the security threats mentioned

Wireless transmission

Frequencies for radio transmission
Signal propagation
Path loss of radio signals
Additional signal propagation effects
Multi-path propagation
Space division multiplexing
Frequency division multiplexing
Time division multiplexing
Code division multiplexing
Amplitude shift keying
Frequency shift keying
Phase shift keying
Advanced frequency shift keying
Advanced phase shift keying
Multi-carrier modulation
Spread spectrum
Direct sequence spread spectrum
Frequency hopping spread spectrum
Cellular systems

Medium access control

Motivation for a specialized MAC
Hidden and exposed terminals
Near and far terminals
Fixed TDM
Classical Aloha
Slotted Aloha
Carrier sense multiple access
Demand assigned multiple access
PRMA packet reservation multiple access
Reservation TDMA
Multiple access with collision avoidance
Inhibit sense multiple access
Spread Aloha multiple access
Comparison of S/T/F/CDMA

Telecommunications systems

Mobile services
System architecture
Radio interface
Localization and calling
New data services
System architecture
Protocol architecture
UMTS and IMT-2000
UMTS releases and standardization
UMTS system architecture
UMTS radio interface
Core network

Satellite systems


Broadcast systems

Cyclical repetition of data
Digital audio broadcasting
Multi-media object transfer protocol
Digital video broadcasting
DVB data broadcasting
DVB for high-speed internet access
Convergence of broadcasting and mobile communications

Wireless LAN

Infra red vs radio transmission
Infrastructure and ad-hoc network
IEEE 802.11
System architecture
Protocol architecture
Physical layer
Medium access control layer
MAC management
Newer developments
Historical: HIPERLAN 1
User scenarios
Radio layer
Baseband layer
Link manager protocol
IEEE 802.15

Mobile network layer

Mobile IP 304
Goals, assumptions and requirements
Entities and terminology
IP packet delivery
Agent discovery
Tunneling and encapsulation
Reverse tunneling
IP micro-mobility support
Dynamic host configuration protocol
Mobile ad-hoc networks
Destination sequence distance vector
Dynamic source routing
Alternative metrics
Overview ad-hoc routing protocols

Mobile transport layer

Traditional TCP
Congestion control
Slow start
Fast retransmit/fast recovery
Implications of mobility
Classical TCP improvements
Indirect TCP
Snooping TCP
Mobile TCP
Fast retransmit/fast recovery
Transmission/time-out freezing
Selective retransmission
Transaction-oriented TCP
TCP over 2.5/3G wireless networks
Performance enhancing proxies

Support for mobility

File systems
Little work
World wide web
Hypertext transfer protocol
Hypertext markup language
Some approaches that might help wireless access
System architecture
Wireless application protocol (version 1.x)
Wireless datagram protocol
Wireless transport layer security
Wireless transaction protocol
Wireless session protocol
Wireless application environment
Wireless markup language
Wireless telephony application
Push architecture
Push/pull services
WAP 2.0

Other Unleashed Courses' List

Universal Mobile Telecommunications System UMTS and High Speed Packet Access HSPA
Telecommunication architecture and information Technologies
Multicarrier Technologies for 4G Mobile Communications
Certified Wireless Network Administrator ® (CWNA ®)
Global System for Mobile Communications GSM
General Packet Radio Service GPRS and EDGE
Long Term Evolution LTE and LTE Advanced
Wimax Technologies and Deployment
Wireless Local Area Network WLAN
Electricity and Electronics
LTE Implementation EPS System
RF Design and Applications
LTE Design in Depth
Bluetooth Appliance
UMTS In-Depth


Cumhuriyet Cad. No:5
Floor 5 - Taksim
34437 Beyoğlu-Istanbul

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