Seamless MIPv6 based Mobility in Seamless MIPv6 based Mobility in Mobile WimaxMobile Wimax

Master Thesis PresentationBy Talha BinFidaDecember, 2009KTH The Royal Institute of TechnologyTelecommunication System Laboratory

Presenter: Talha Bin FidaExaminer: Peter SjödinSupervisor: Luca ValcarenghiOpponents: Ali Raza,Kryiakos Zarifis

ContentsContents

Introduction Research Motivation and Scope Problem Statement Mobile WiMAX Architecture based on IEEE 802.16e Mobility in Mobile WiMAX IEEE 802.21 and Handover Procedures Simulation Setup Performance Evaluation and Analysis Conclusion and Future Work Q&A

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IntroductionIntroduction

Broadband Wireless Access Covergence toward ”All IP Networks” IEEE 802.16 an important 4G contender Mobility,nomadicity and portability

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Challenges Triple Play (Voice,Video and Data) Quardruple Play and Killer Application Mobility and session continuation Varying QoS requirements

Figure: Bandwidth vs. Mobility

Research Motivation and ScopeResearch Motivation and Scope Research Motivation Analysis of mobility in Mobile WiMAX Measurement of handoff delay and packet losses Handoff latency analysis for realistic scenario

Scope Handover type will be hard handover i.e. break-before-make Host based mobility procedures Handover is terminal initiated depending upon received signal strength indication

(RSSI). Mobile IPv6 based mobility procedures implemented in MN Inter-ASN handover procedures are within the scope of this thesis. Inter-NAP (Network Access Provider) handover are not considered due to roaming

and other contractual agreement reasons.

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Problem StatementProblem Statement

What is the effect of mobility on real time and multimedia applications at higher speeds during handovers in Mobile WiMAX?

How and when it is suitable to trigger handoff when MS is changing its attachment point frequently from one BS to another BS?

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Mobile WiMAX ArchitectureMobile WiMAX Architecture

6Figure: WiMAX Network Reference Model[2]

Mobility in Mobile WiMAXMobility in Mobile WiMAX

Mobility a promminent feature of Mobile WiMAX “Handover (HO) is the process when MS moves from the air-interface

provided by one BS to the air-interface provided by another BS” [1].

Mobility in WiMAX can be classified into two domains

o Access Service Network Anchored Mobilityo Connectivity Service Network Anchored Mobility

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ASN-Anchored MobilityASN-Anchored Mobility

R6

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Base Station 1 Base Station 2Base Station 3

NSPR3 R3

R4

ASN-GatewayNAP2

ASN-GatewayR6

R8

R6

HA

Figure: ASN-Anchored Mobility

CSN-Anchored MobilityCSN-Anchored Mobility

R6

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Base Station 1 Base Station 2Base Station 3

NSPR3 R3

R4

ASN-GatewayNAP2

ASN-GatewayR6

R8

R6

HA

Figure: CSN-Anchored Mobility

Mobile IPv6Mobile IPv6

Dominant network layer mobiltiy protocol for next generation ”All IP based Networks”.

Two modes of communication Bidirectional Tunneling Route Optimization

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Figure: Mobile IPv6 Operation

IEEE 802.21/Media Independent IEEE 802.21/Media Independent HandoverHandover

MIH/IEEE 802.21 enables handover between hetrogenous networks (e.g 802.11, 802.16e,UMTS,Ethernet)

Optimization and interoperability MIH Events Service MIH Command Service MIH Information Services

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MIH FunctionalityMIH Functionality

12Figure: MIH Architecture and Functionality

MIH Handover using LD TriggerMIH Handover using LD Trigger

13Figure: Handover using Link Down Trigger

MIH Handover using LGD TriggerMIH Handover using LGD Trigger

14Figure: Handover using Link Going Down Trigger

Layer 3 Handover ProcedureLayer 3 Handover Procedure

15Figure: Layer 3 Handover

Simulation SetupSimulation Setup

Mobility is evaluated via simulation based on NS-2 with NIST mobility package for WiMAX

MIPv6 Agent Neighbour Discovery Module MIH Agent

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Simulation TopologySimulation Topology

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Performance EvaluationPerformance Evaluation

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Performance Evaluation(cont)Performance Evaluation(cont)

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Performance Evaluation(cont)Performance Evaluation(cont)

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Performance Evaluation(cont)Performance Evaluation(cont)

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Handoff Latency Analysis for Realistic Handoff Latency Analysis for Realistic ScenarioScenario

There can be four major communication scenarios between the MS and CN

MS and HA are located close to each other, but far from CN MS is close to CN but far from HA MS is far from both CN and HA MS is located close to both CN and HA

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Handoff Latency Analysis for Realistic Handoff Latency Analysis for Realistic Scenario (cont)Scenario (cont)

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Figure: Realistic Mobility Scenario

Handoff Latency Analysis for Realistic Handoff Latency Analysis for Realistic Scenario (cont)Scenario (cont)

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ConclusionConclusion

Evaluated handoff procedures in Mobile WiMAX MIH integrates cross layer inforamtion Two important triggers LD and LGD Higher packet losses and delay using LD Performacne improvement using LGD

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Future WorkFuture WorkTraditionally RSSI is the main handoff metric

Cost of service Available Bandwidth Power and QOS requirements User preferences Network conditions

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ReferencesReferences[1.] IEEE 802.16 Working Group IEEE Standard for Local and Metropolitan area

networks, Part 16: Air Interface for Fixed Broadband Wireless Access Systems Amendment 2 IEEE Std 802.16e-2005, February 2006

[2.] Yan Zhang, Hsiao-Hwa Chen Mobile WiMAX towards Broadband Wireless Metropolitan Area Networks Concepts Published by Auerbach Publications Taylor and Francis Group, ISBN: 978-0-8493-2624-0

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Questions And AnswersQuestions And Answers

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