Handover Management In Integrated Wlan And Mobile Wimax
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Handover management in integrated wlan and wimax

Handover management in integrated wlan and wimax

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Handover Management In Integrated Wlan And Mobile Wimax Presentation Transcript

  • 1. HANDOVER MANAGEMENT IN INTEGRATED WLAN AND MOBILE WIMAX NETWORKS
    Pradeep Thomas Thundiyil
    M.Tech 2nd Sem
    DCN
    1
  • 2. OverviewWLAN and WMAN: Integration.Mobility Management and Integration Solutions For Heterogeneous All-IP Wireless Networks. Mixed Network Client Use Case.Handover Between WIMAX and WIFIUsing MIH Framework.
    2
  • 3. Need for Integration
    3
    • Ubiquitous Coverage.
    • 4. Broadband Connectivity.
    • 5. Quality Of Service.
    • 6. Economical.
  • Mixed WiFi and WiMAX
    4
  • 7. Handoff
    5
  • 8. Types of Handovers
    Homogeneous (Horizontal) Handovers
    Within Single Network (Localized Mobility)
    Limited opportunities
    Heterogeneous (Vertical) Handovers
    Across Different Networks (Global Mobility)
    More Opportunistic
    IEEE 802.21 is primarily for Vertical Handovers
    ….can also be used for Homogeneous Handovers
    6
  • 9. Overview WLAN and WMAN: Integration.Mobility Management and Integration Solutions For Heterogeneous All-IP Wireless Networks. Mixed Network Client Use Case.Handover Between WIMAX and WIFIUsing MIH Framework.
    7
  • 10. 8
  • 11. Mobility Management
    MIP provides a new IP address to a mobile node as it moves to a new network.
    9
    IETF Solutions: Upper Layer Protocols
    In MIPv4 the correspondent node (CN) sends packet to the MN through the MN’s HA – longer route.
    MIPv6 allows CN to send packets directly to the FA at the visited network – reduced delay.
    In L3 Handover the disruption due to long delays is minimized using Fast handover MIP (FMIP).
  • 12. IETF Solutions: Upper Layer Protocols
    Network Layer MIP
    Transport Layer mSCTP
    Application Layer SIP
    SIP is an application layer signaling protocol:
    Widely used for setting up and tearing down multimedia sessions.
    10
  • 13. 3GPP Solutions
    3GPP defined a mobility management scheme based on IMS.
    VCC/IMS integrates UMTS and unlicensed spectrum technologies (Wi-Fi).
    SAE/LTE System Architecture Evolution/ Long term Evolution (efficient Vertical Handover).
    11
  • 14. 12
    Transfer Connection
    Setup New Link
    Search New Link
    Handover Signaling
    Packet Reception
    Network Discovery
    Network Selection
    Handover Negotiation
    Layer 2 Connectivity
    IP Connectivity
    Scope of 802.21
    Handover Execution
    Handover Initiation
    Handover Preparation
    IEEE 802.21 helps with Handover Initiation,
    Network Selection and Interface Activation
  • 15. 13
    What IEEE 802.21Defines
    • The current specification includes a Media Independent Handover Function (MIHF) consisting of three basic services
    • 16. Media Independent Event Service (MIES)
    • 17. Media Independent Command Service (MICS), and
    • 18. Media Independent Information Service (MIIS)
    • 19. MIH aims to help and enhance the operation of mobility management protocols.
    13
  • 20. 14
    What is Media Independent Handover ?
    Media Independent Handover Services is an IEEE (802.21) working on a specification that facilitates handover optimization between heterogeneous access networks by providing
    Link layer intelligence and
    Network information to upper layers
    Support for multiple access technologies (e.g., IEEE and non-IEEE access technology)
    Support for both network and device initiated handovers
  • 21. Media Independent Event Service (MIES)
    Events may originate from MAC, PHY or MIH Function either at the mobile node or at the network.
    The source of these events may be either local or remote.
    Two types of Event Service
    Link Events and
    MIH Events.
    15
    MIH User (L3 and above)
    MIH Event
    s
    MIHF
    Link Event
    s
    Lower Layers (L2 and below)
  • 22. 16
    MIH Events
    16
  • 23. 17
    MIH Users (L3 and above)
    MIH Commands
    MIHF
    Link Commands
    Lower Layers (L2 and below)
    Media Independent Command Service (MICS)
    • Media Independent Command Service refers to the commands sent from the higher layers to the lower layers in the reference model
    • 24. Two types of Command Service
    • 25. MIH Commands
    • 26. Link Commands
    17
  • 27. MIH Commands
    18
  • 28. 19
    IEEE 802.21 Standard - Media Independent Handover (MIH) framework
  • 29. Overview WLAN and WMAN: Integration.Mobility Management and Integration Solutions For Heterogeneous All-IP Wireless Networks.Mixed Network Client Use Case.Handover Between WIMAX and WIFIUsing MIH Framework.
    20
  • 30. 21
    Radio State
    Radio State
    Radio State
    Radio State
    3G WWAN
    3G WWAN
    3G WWAN
    3G WWAN
    Wi-Fi
    Wi-Fi
    Wi-Fi
    Wi-Fi
    WiMAX
    WiMAX
    WiMAX
    WiMAX
    GPS
    GPS
    GPS
    GPS
    Radio State
    Radio State
    Radio State
    3G WWAN
    3G WWAN
    3G WWAN
    Wi-Fi
    Wi-Fi
    Wi-Fi
    WiMAX
    WiMAX
    WiMAX
    GPS
    GPS
    GPS
    MxN – Mixed-Network Client Use Case
    3G WWAN
    Operating on 3G WWAN
    Zone 1
    Zone 2
    Zone 3
    Plug into power jack Wakeup Wi-Fi
    Continue over Wi-Fi
    Wakeup Wi-Fi
    Zone 6
    Zone 5
    Zone 4
    Airport
    Wi-Fi Link Going Down.
    Connect to Wi-Fi
    Home
    Continue session on 3G WWAN
    Continue session on Wi-Fi
    Battery level low
    Shutdown WiMAX
    Switch to 3G WWAN
    Operator initiated switch to WiMAX
    Continue session on WiMAX
    Shutdown Wi-Fi
    WiMAX
    WiMAX
    Zone 7
    Zone 9
    Zone 8
    VCC, SIP, IMS for Call Continuity (3G WWAN  Wi-Fi)
    IEEE 802.21 for Network Discovery
    IEEE 802.21, SIP, VCC, IMS, for Network Selection and Service Continuity across multiple radios (3G WWAN  Wi-Fi  WiMAX)
    802.21, SIP, IMS for Service Continuity (Wi-Fi  WiMAX)
  • 31. OverviewWLAN and WMAN: Integration.Mobility Management and Integration Solutions For Heterogeneous All-IP Wireless Networks. Mixed Network Client Use Case.Handover Between WIMAX and WIFIUsing MIH Framework.
    22
  • 32. 23
  • 33. Always best connected scenario: WiMAX/WiFi handover using the MIH framework.
    MobileNode
    Current WiMAX BS
    Candidate Wi-FI AP
    Candidate Wi-Fi AP
    MIIS
    MN becomes aware of new connectivity opportunities through beacons received from candidate APs. Alternatively, it can also periodically query the MIIS to gather information on available access networks.
    1
    MIH_Get_Information Request
    MIH_Get_Information Response
    MIH_N2N_HO_Candidate_Query Request
    MIH_N2N_HO_Query_Resource Request
    2
    MIH_N2N_HO_Query_Resource Request
    3
    MIH_N2N_HO_Query_Resource Response
    24
    MIH_N2N_HO_Candidate_Query Request
  • 34. Always best connected scenario: WiMAX/WiFi handover using the MIH framework.
    Mobile Node
    Current WiMAX BS
    Candidate Wi-FI AP
    Candidate Wi-Fi AP
    MIIS
    Handover decision based on resource availability and user’s preferences. Selection of the target network.
    4
    MIH_MN_Handover_Commitrequest
    MIH_N2N_Handover_Commit Request
    MIH_N2N_Handover_Commit Response
    MIH_MN_Handover_Commit response
    (FMIPv6) HAck, FBAck
    (Wi-FI) ASSOCIATION PROCEDURE
    (WiMAX) DISSASSOCIATION_PROCEDURE
    MIH_MN_Handover_Complete Request
    MIHMN_Handover_Complete Response
  • 35. Conclusion & Future Directions
    • The integration of heterogeneous networks seems to be a good approach in order to offer the 4G always best connected vision.
    • 36. The use of the MIH framework for integrating WiFi and WiMAX networks provides seamless handover.
    MIH support for multihop heterogeneous networks, QoS mapping, and resource allocation mechanisms for WLAN/WMAN integrated networks, and security solutions are to be improved.
    26
  • 37. References
    G. Lampropoulos, A. Salkintzis, and N. Passas, “Media Independent Handover for Seamless Service Provision in Heterogeneous Networks,” IEEE Commun. Mag., vol. 46, no. 1, Jan. 2008.
     
    Kejie Lu, Yi Qian, Hsiao-Hwa Chen, “ A Secure and Service-Oriented Network Control Framework for WiMAX Networks,” IEEE Communications Magazine, May 2007.
     
    Ian F Amine M. Houyou, Hermann De Meer, Moritz Esterhazy, “P2P-based Mobility Management for Heterogeneous Wireless Networks and Mesh Networks”.
    27
  • 38. 28
    Thankyouforyourattention..!
    Questions ?