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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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