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Challenges of Multi-hop Ad Hoc Wireless Networks

Explore the complexities of IP links in wireless networks, including asymmetry, time-variance, and connectivity issues leading to undefined neighbor relationships. Learn about the impact on protocols and neighbor discovery. Understanding the implications of disconnected subnets is crucial.

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Challenges of Multi-hop Ad Hoc Wireless Networks

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  1. Multi-hop Ad Hoc Wireless Communicationdraft-baccelli-manet-multihop-communication-02Emmanuel BaccelliCharlie Perkins IETF87, Berlin 1st August 2013

  2. Problems with IP links in spontaneous wireless networks • Asymmetry • Time-variance • Non-transitivity • Indefinite range = UNDEFINED CONNECTIVITY

  3. Consequences • Concept of a “neighbor” becomes ambiguous • Affects “neighbor discovery protocol” • Definition of a “link” is no longer as crisp • Affects the operation of protocols using “link-local” addresses • Have to be very careful when advertising “subnet prefixes” (see for instance RFC 5889) • ICMP handling • What if the subnet gets “disconnected”? • Did I mention “verrrrrry careful”???

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