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Mobility Management in GENI WiMAX

Mobility Management in GENI WiMAX. Parmesh Ramanathan University of Wisconsin, Madison parmesh@ece.wisc.edu. Handoff Scenarios. Both basestations (BS) are in the same IP subnet Both BS in different IP subnets A new Layer 3 e.g., Mobility First

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Mobility Management in GENI WiMAX

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  1. Mobility Management in GENI WiMAX Parmesh Ramanathan University of Wisconsin, Madison parmesh@ece.wisc.edu

  2. Handoff Scenarios • Both basestations (BS) are in the same IP subnet • Both BS in different IP subnets • A new Layer 3 • e.g., Mobility First • GENI Airspan BS do not have Layer 2 handover software • All three scenarios need Layer 2 handover

  3. Layer 2 Handoff Schemes • Break and Make • Mobile node breaks its connection with current WiMAX BS and then establishes connection with the new WiMAX BS • No new software needed • Handoff latency • We need to measure • Make and Break • Mobile node needs two interfaces • Yellow nodes have this capabilities • Can most laptops also support two interfaces? • In the simplest form, one interface always connects to BS1 while the other connects to BS2 (whenever possible) • Requires some s/w at the mobile node

  4. Layer 3 Handoff Schemes Subnet 1 BS1 • Minimal solution • S/w on controller node re-routes through new BS after IP address re-write • Does not allow initiation of incoming connection to mobile node (e.g. incoming Skype call) Mobile node OpenFlow Router To Internet Subnet 2 BS2

  5. Layer 3 Handoff Schemes Subnet 1 BS1 • General solution • Open source mobile IP s/w (Transparent Mobile IP) • http://sourceforge.net/projects/tmip/ • Presently working with this s/w • Needs OpenFlow s/w in mobile node to de-encapsulate IP packets Mobile node OpenFlow Router To Internet Subnet 2 BS2

  6. Timeline • Yellow Node with two interfaces doing handover between two BS in the same subnet • Transparent MobileIP working to implement a baseline Layer 3 handover scheme • Support new Layer 3 solutions like Mobility First • Demonstrate heterogeneous network handovers

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