A Load Balancing Algorithm against DDoS Attacks in Beyond 3G Wireless Networks

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1 A Load Balancing Algorithm against DDoS Attacks in Beyond 3G Wireless Networks Stefania Zinno, Giovanni Di Stasi, Stefano Avallone, Giorgio Ventre Università degli Studi di Napoli Federico II Dipartimento di Ingegneria Elettrica e delle Tecnologie dell Informazione INW th Italian Networking Workshop: Cavalese, Italy

2 1 Introduction Fundamentals 2 The proposed Tecnique Simulations 3 Conclusion Results

3 Long Term Evolution Network LTE also known as 4G is a Wireless Standard developed by 3GPP, the 3rd Generation Partnership Project. - OFDMA - MIMO Techniques - IP-based system - DL 3 Gbps, UL 1.5 Gbps

4 Denial of Service Attacks DDoS stands for Distributed Denial of Service. It is a specific Denial of Service attack performed by a multitude of compromised systems against a specific target. - BotMaster - Handler - Agent o Zombie - Victim Host Network

5 Handover Procedure Handover is supported in LTE networks to ensure service continuity when moving out of the LTE coverage area. - Network Controlled UE Assisted - Based on X2 Interface and Received Signal Strength Indication

6 Self Organizing Network Self-organizing networks (SON) are the attempt to simplify and speed up the planning, configuration, management, optimization and healing of LTE and LTE-Advanced-based networks.

7 Load Balancing Procedure in RRC state CONNECTED

8 Transport Block Ns3 offers a much more plain MAC model than the 3GPP one. Transport block is equal to a MAC PDU.

9 Load Balancing Tecnique The Algorithm is: - Distributed - Iterative - Local - Optimized - Perfectly Integrated in LTE Architecture

10 enodeb Control Messages: - Late Path Switching - Measurement Report - Loseless and Seamless Data Communication

11 Ns3 Simulation Environment for Networking Research Ns-3 is a network simulator for Internet systems, targeted primarily for research and educational use. Ns-3 is free software and is publicly available for research, development, and use. - Discrete-event network simulator - Open Source - Librerie C++

12 Ns3 Module Two are the main modified classes: - lte-enb-rrc.h - epc-x2-sap.h

13 Callback Ns3 At execution time all information regarding all TB scheduled are collected by each enodeb through a DL transmission statistics callback

14 Implementation Details

15 Scenario Set Up enodeb: Constant Position Mobility Model UE: Constant Velocity Mobility Model constant speed of 20 m/s. Multimedia Users: - Non Guaranteed Bit Rate VIDEO TCP PREMIUM - Non Guaranteed Bit Rate VIDEO TCP DEFAULT - Guaranteed Bit Rate NON CONVersational VIDEO Voice Users: - Tre Guaranteed Bit Rate CONVersational VOICE

16 Scenario: Network Topology and Packet Traffic

17 Scenario: Ten attacked enodeb

18 Results - More efficiency achieved in resource distribution - Traffic flows and network performances are increased - Perfectly integrated with LTE Modules - No backup infrastructure needed

19

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