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Handoff in Hybrid Mobile Data Networks

Handoff in Hybrid Mobile Data Networks. Vijay Dadlani. Types of Handoffs. Handoff in Cellular Telephony. Handoff in Wireless Networks. Handoff in Hybrid Networks. The Ping-Pong Effect. Takes a severe toll on the user’s quality reception and the network load.

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Handoff in Hybrid Mobile Data Networks

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  1. Handoff in Hybrid Mobile Data Networks Vijay Dadlani.

  2. Types of Handoffs • Handoff in Cellular Telephony. • Handoff in Wireless Networks. • Handoff in Hybrid Networks.

  3. The Ping-Pong Effect • Takes a severe toll on the user’s quality reception and the network load. • Persist with a BS for as long as possible.

  4. Important Issues involved in Handoff mechanism.

  5. The GPRS routing update procedure

  6. Handoff procedures in an IEEE 802.11 WLAN

  7. Active scanning Vs Passive scanning • Passive scanning – mobile host simply listens to available beacons. • Active scanning – mobile host sends a probe request to a targeted set of APs that are capable of receiving its probe.

  8. Comparison of handoff procedures in voice and data mobile networks.

  9. Horizontal Vs Vertical Handoff. • Upward vertical Vs Downward vertical handoff.

  10. Design Considerations • The objective is to reduce major changes to existing networks esp. at lower levels. • This will ensure that existing networks will continue to function as before without requiring current users to change to the new approach.

  11. Mobile-IP Based Architecture

  12. Conclusions • Traditional Handoff algorithms have poor performance and are being replaced by emerging advanced Handoff algorithms. • No one technology can provide ubiquitous coverage, resulting in the need for HO in a Hybrid network.

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