Mobile Ad Hoc Networking

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Mobile Ad hoc NetworkDeepak Kumar Nayak Electronics & Telecommunication 29 October 2010Manet1Contents1. Introduction 2. Historical back ground 3. Types of wireless network 4. MANET concept 5. MANET features 6. Implementation of manet 7. Characterstics of manet 8. Routing in manet 9. Clasification of Routing protocols 10.MANET application 11.Conclusions Manet2Introduction Self-configuring network ofmobile routers (and associated hosts) connected by wireless links This union forms a random topology Routers move randomly free Topology changes rapidly and unpredictably Standalone fashion or connected to the larger Internet Suitable for emergency situations like natural or human-induced disasters, military conflicts, emergency medical situations, etc.Manet 3History of MANETEarliest MANETs were called packet radio networks, sponsored by DARPA (Defense Advanced Research Projects Agency) in 1970 Later DARPA experiments included the Survivable Radio Network (SURAN) project (1980s) 1990s the advent of inexpensive 802.11 radio cards for personal computer Current MANETs are designed primary for military utility; examples include JTRS (Joint Tactical Radio System) and NTDR (Near-Term Digital Radio). Manet 4Types of Wireless NetworksInfrastructure based(Cellular Network). Infrastructureless Network(Mobile Ad hoc NETwork) (MANET). The traffic types of Cellular network are as follows Peer to peer Remote to remote Dynamic TrafficManet 5Infrastructure based WNManet6Manet ConceptA mobile ad hoc network is a collection of wireless nodes that can dynamically be set up anywhere and anytime without using any pre-existing network infrastructure. It is an autonomous system in which mobile hosts connected by wireless links are free to move randomly and often act as routers at the same timeManet7Ad hoc WN8 ManetMANET Features1) Autonomous terminal. 2) Distributed operation. 3) Multihop routing. 4) Dynamic network topology 5) Fluctuating link capacity 6) Light-weight terminalsManet 9Implementation of ManetImplementation of ManetImplementation of ManetHybrid Mobile Ad-hoc NetworkHybrid Mobile Ad-hoc NetworkOverall View of ManetCharacteristics of MANETs Dynamic topology links formed and broken with mobilityABAB Possibly uni-directional links Constrained resources battery power wireless transmitter range Network partitionsCharacteristics of Manet cntd. Collection of mobile nodes forming a temporary network Network topology changes frequently and unpredictably No centralized administration or standard support services Host is also function as routerRouting in MANETsTo find and maintain routes between nodes in a dynamic topology with possibly uni-directional links, using minimum resources.The Routing is Different in Ad Hoc n/w due to Host mobility Dynamic topology link failure/repair due to mobility Distributed Environment Bandwidth constrained Energy constrainedCategorization of Ad-Hoc Routing ProtocolsTable Driven Routing Protocol Proactive. Each node maintains one or more tables containing routing information to every other node in the network. Tables need to be consistent and up-to-date view of the network. Updates propagate through the networkClusterhead Gateway Switch Routing (CGSR)Source Initiated On demand routing protocol Reactive. on-demand style: create routes only when it is desired by the source node When a node requires a route to a destination, it initiates a route discovery process Route is maintained until destination becomes unreachable, or source no longer is interested in destination.Associativity-Based Routing (ABR)Manet23MANET Applications1) Military battlefield 2) Commercial sector3) Local level. 4) Personal Area Network (PAN).Manet24CONCLUSIONSThis article describes the fundamental issues and analyses key research problems of MANET. Firstly, the background information of MANET are introduced, including the MANET concept, features, current status, and application areas. Then the main challenges of MANET are discussed that lead to the analysis of relevant kernel barrier. Finally, four key network layer research issues of MANET routing strategies are described in detail. The novel and advanced solutions to these issues are necessary to fulfil the requirements of wide commercial deployment of MANET.Manet 25References Elizabeth M. Royer, Chai-Keong Toh, A Review of Current Routing Protocols for Ad Hoc Mobile Wireless Networks,Proc. IEEE,2008 David B. Johnson, " Routing in Ad hoc Networks of Mobile Hosts", Proc IEEE Workshop on Mobile Computing Systems and Applications. Nicklas Beijar Zone Routing Protocol . issues/issue200407/00001326001.html youManet27


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