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Mobile Ad-Hoc Networks(MANET) SEMINAR  BY  Vinit pareek B.TECH(ECE-8 th  sem.) FINAL YEAR(S.B.C.E.T)
Organization <ul><li>Introduction to Mobile Ad hoc networks (MANETs) </li></ul><ul><li>Routing in MANETs </li></ul><ul><li...
Introducing MANETs <ul><li>Cellular Networks </li></ul><ul><ul><ul><li>Infrastructure dependent </li></ul></ul></ul><ul><u...
Applications of MANETs <ul><li>Some motivating applications: </li></ul><ul><li>Casual conferencing </li></ul><ul><ul><ul><...
Mobile Ad hoc Networks <ul><ul><ul><li>First ad-hoc network was dev. By ARPA called “Packet  </li></ul></ul></ul><ul><ul><...
Characteristics of MANETs <ul><ul><ul><li>Dynamic topology </li></ul></ul></ul><ul><ul><ul><ul><li>links formed and broken...
Dynamic Source Routing (DSR) <ul><li>Routing is through source routing </li></ul><ul><ul><li>complete path with each packe...
Route Discovery <ul><li>A route between two nodes is found by sending an Route Request </li></ul><ul><li>Route Request bui...
Destination Sequenced Distance Vector (DSDV) <ul><li>Modified Distance Vector protocol </li></ul><ul><ul><li>periodic DV u...
Clusterhead Gateway Switch Routing (CGSR) <ul><li>A clusterhead is able to control a group of ad-hoc hosts </li></ul><ul><...
Clusterhead Gateway Switch Routing (CGSR)
Associativity-Based Routing (ABR) <ul><li>Free from loops, deadlock, and packet duplicates, and defines a new routing metr...
Associativity-Based Routing (ABR)
Signal Stability Routing (SSR) <ul><li>Based on ABR </li></ul><ul><li>It selects routes based on signal strength. </li></u...
Security in MANET <ul><li>Access control </li></ul><ul><li>Kerberos </li></ul><ul><li>Cryptographyic schemes  </li></ul><u...
Performance Issues   <ul><li>Network size </li></ul><ul><li>Route acqusition time </li></ul><ul><li>Connectivity </li></ul...
The Dynamic Virtual Backbone <ul><ul><li>The dynamic virtual backbone is a concept wherein a set of relatively stable rout...
References <ul><li>Wikipedia.org </li></ul><ul><li>RFC document of IETF. </li></ul><ul><li>Mobile Computing By Johan Schil...
THANK YOU ALL
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Manet

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Manet

  1. 1. Mobile Ad-Hoc Networks(MANET) SEMINAR BY Vinit pareek B.TECH(ECE-8 th sem.) FINAL YEAR(S.B.C.E.T)
  2. 2. Organization <ul><li>Introduction to Mobile Ad hoc networks (MANETs) </li></ul><ul><li>Routing in MANETs </li></ul><ul><li>Virtual Backbone Routing </li></ul><ul><li>Security </li></ul><ul><li>Performance measures </li></ul>
  3. 3. Introducing MANETs <ul><li>Cellular Networks </li></ul><ul><ul><ul><li>Infrastructure dependent </li></ul></ul></ul><ul><ul><ul><li>High setup costs </li></ul></ul></ul><ul><ul><ul><li>Large setup time </li></ul></ul></ul><ul><ul><ul><li>Reliable </li></ul></ul></ul><ul><ul><ul><li>MANETs </li></ul></ul></ul><ul><ul><ul><li>(RFC2051 of IETF) </li></ul></ul></ul><ul><ul><ul><li>No infrastructure is used </li></ul></ul></ul><ul><ul><ul><li>Fast setup </li></ul></ul></ul><ul><ul><ul><li>Flexible and dynamic </li></ul></ul></ul>
  4. 4. Applications of MANETs <ul><li>Some motivating applications: </li></ul><ul><li>Casual conferencing </li></ul><ul><ul><ul><li>low set-up time, cost preferred </li></ul></ul></ul><ul><li>Battlefield operations/disaster relief </li></ul><ul><ul><ul><li>infrastructure unavailable </li></ul></ul></ul><ul><li>Personal area networking </li></ul><ul><ul><ul><li>devices around the home/office </li></ul></ul></ul><ul><li>Cellular networks are not preferred. </li></ul>
  5. 5. Mobile Ad hoc Networks <ul><ul><ul><li>First ad-hoc network was dev. By ARPA called “Packet </li></ul></ul></ul><ul><ul><ul><li>Radio Networks” had 138 mobile nodes. </li></ul></ul></ul><ul><ul><ul><li>multi-hop routes between nodes. </li></ul></ul></ul>
  6. 6. Characteristics of MANETs <ul><ul><ul><li>Dynamic topology </li></ul></ul></ul><ul><ul><ul><ul><li>links formed and broken with mobility </li></ul></ul></ul></ul><ul><ul><ul><li>uni-directional links and bi-directional links </li></ul></ul></ul><ul><ul><ul><li>Constrained resources </li></ul></ul></ul><ul><ul><ul><ul><li>battery power </li></ul></ul></ul></ul><ul><ul><ul><ul><li>wireless transmitter range </li></ul></ul></ul></ul><ul><ul><ul><li>Network partitions </li></ul></ul></ul>A B A B
  7. 7. Dynamic Source Routing (DSR) <ul><li>Routing is through source routing </li></ul><ul><ul><li>complete path with each packet </li></ul></ul><ul><li>Route discovery </li></ul><ul><ul><li>flooding RREQ till a node replies </li></ul></ul><ul><li>Route maintainance </li></ul><ul><ul><li>explicit link breakage notification </li></ul></ul><ul><ul><li>Mobility of a node can break routes passing through it. </li></ul></ul>
  8. 8. Route Discovery <ul><li>A route between two nodes is found by sending an Route Request </li></ul><ul><li>Route Request builds a source route on every path through the network </li></ul><ul><li>First Route Request to arrive is accepted; target responds on that path and tells initiator what the source route is </li></ul><ul><li>Source route is used on subsequent data traffic </li></ul>B H I J G F E D A C K Detected Source Route: (A, B, F, J, K)
  9. 9. Destination Sequenced Distance Vector (DSDV) <ul><li>Modified Distance Vector protocol </li></ul><ul><ul><li>periodic DV updates </li></ul></ul><ul><li>High frequency of DV updates </li></ul><ul><ul><li>topology is dynamic </li></ul></ul><ul><li>Does not scale well </li></ul><ul><ul><li>size of DV updates increase </li></ul></ul><ul><ul><li>high routing overheads </li></ul></ul>
  10. 10. Clusterhead Gateway Switch Routing (CGSR) <ul><li>A clusterhead is able to control a group of ad-hoc hosts </li></ul><ul><li>Each node maintains 2 tables: </li></ul><ul><ul><li>A cluster member table, containing the cluster head for each destination node </li></ul></ul><ul><ul><li>A DV-routing table, containing the next hop to the destination </li></ul></ul>
  11. 11. Clusterhead Gateway Switch Routing (CGSR)
  12. 12. Associativity-Based Routing (ABR) <ul><li>Free from loops, deadlock, and packet duplicates, and defines a new routing metric for ad-hoc mobile networks </li></ul><ul><li>Hello message exchange periodically b/w neighbours </li></ul><ul><li>With the temporal stability and the associativity table the nodes are able to classify each neighbor link as stable or unstable. </li></ul>
  13. 13. Associativity-Based Routing (ABR)
  14. 14. Signal Stability Routing (SSR) <ul><li>Based on ABR </li></ul><ul><li>It selects routes based on signal strength. </li></ul><ul><li>Can be dynamic or static </li></ul><ul><li>Advantages: to select strong connection leads to fewer route reconstruction. </li></ul><ul><li>Drawbacks: long delay since intermediate nodes can’t answer the path (unlike AODV, DSR) </li></ul>
  15. 15. Security in MANET <ul><li>Access control </li></ul><ul><li>Kerberos </li></ul><ul><li>Cryptographyic schemes </li></ul><ul><li>Packet retransmission </li></ul><ul><li>Intrusion Detection System(IDS) </li></ul>
  16. 16. Performance Issues <ul><li>Network size </li></ul><ul><li>Route acqusition time </li></ul><ul><li>Connectivity </li></ul><ul><li>Average no. of data transmitted </li></ul><ul><li>Fraction of sleeping nodes </li></ul><ul><li>Routing protocol used </li></ul>
  17. 17. The Dynamic Virtual Backbone <ul><ul><li>The dynamic virtual backbone is a concept wherein a set of relatively stable routes are formed despite nodes being mobile. </li></ul></ul><ul><ul><li>a possible way is to abstract mobility through aggregation </li></ul></ul>
  18. 18. References <ul><li>Wikipedia.org </li></ul><ul><li>RFC document of IETF. </li></ul><ul><li>Mobile Computing By Johan Schillar </li></ul>
  19. 19. THANK YOU ALL

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