An assessment of mobile ad hoc network manet issues
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An Assessment of Mobile Ad-Hoc Network (MANET) Issues. Jerry Usery CS 526 May 12 th , 2008. MANET Issues - Overview. History Uses Technical Concerns DSR and AODV Routing Security. MANET Issues - History. Three generations of ad-hoc network systems 1 – 1972, PRNET ALOHA, CSMA

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An Assessment of Mobile Ad-Hoc Network (MANET) Issues

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An assessment of mobile ad hoc network manet issues

An Assessment of MobileAd-Hoc Network (MANET) Issues

Jerry Usery

CS 526

May 12th, 2008


Manet issues overview

MANET Issues - Overview

  • History

  • Uses

  • Technical Concerns

  • DSR and AODV Routing

  • Security


Manet issues history

MANET Issues - History

  • Three generations of ad-hoc network systems

    • 1 – 1972, PRNET

      • ALOHA, CSMA

    • 2 – 1980s, SURAN

      • Packet-switched network

      • No infrastructure

      • Increased radio performance

    • 3 – Current generation


Manet issues uses

MANET Issues - Uses

  • Growing need

    • Emergency and rescue operations

    • Disaster relief efforts

    • Military networks

  • Flexibility and speed of set-up is key


Manet issues technical concerns

MANET Issues – Technical Concerns

  • Routing has been problematic

    • Existing Internet protocols intended for fixed infrastructure

    • Limited success with conventional protocols at each router

      • Bandwidth, power constraints, topology changes and SECURITY concerns

    • Link state protocols (bandwidth, reliability issues)

    • On-demand protocols (frequent topology changes)


Manet issues dsr and aodv routing

MANET Issues – DSR and AODV Routing

  • DSR

    • Simple, specifically designed for MANETs

    • Implemented on several testbeds

    • Connected to Internet

    • Route discovery & maintenance

    • Scales automatically

    • Allows multiple routes to any node

    • Designed for approximately 200 nodes, unicast IPv4 packets


Manet issues dsr and aodv routing cont

MANET Issues – DSR and AODV Routing (Cont)

  • AODV

    • Experimental protocol

    • Rapid adaptation to dynamic link changes

    • Low use of the network

    • Low memory overhead and processing

    • Finds unicast routes within the network

    • Uses destination sequence numbers (no loops)

    • Nodes notified when link is broken

    • IPv6 packets


Manet issues security

MANET Issues – Security

  • Major Issue with as needed connections

  • Client-server structure does not apply

  • Availability, confidentiality, integrity, authentication, non-repudiation all face challenges

  • Dynamic security solution required

  • External attacks

    • Active - Erroneous routes, replaying old information, false route queries, distortion of route information

    • Passive - Eavesdropping data, analyzing traffic

  • Internal attacks

    • Compromised nodes can use standard security to protect their attacks

    • Valid signatures must be validated


Manet issues

MANET Issues

  • Questions?


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