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Mobile Ad Hoc Networks
Types of Mobile Networks
• Infrastructure networks
• Infrastructureless networks
Infrastructure Networks
 It is based on the cellular concept And It has good infrastructure .
 In infrastructure network the mobile devices are communicate with the others through base stations connected to the fixed network infrastructure.
Infrastructureless Networks
 In infrastructureless network the mobile wireless network is commonly known as mobile adhoc network (MANET).
 A MANET is a collection of wireless nodes that can dynamically form a network to exchange information without using any pre-existing network infrastructure.
Characteristics of MANET
• Infrastructure-less or with minimum infrastructure support.
• Self-organizing and self-managing.
• Most or all of the nodes are mobile.
• Network topology changes dynamically.
• Wireless communication.
• Node is working as a host and a router.
• Multi-hop.
Applications of MANET
• Military battlefield.
• Commercial sector.
• Local level.
• Personal area network.
• Etc
• Military battlefield
-- adhoc networking would allow the
military to take advantage of common place network technology to maintain an information between the soldiers, vehicles and military information head quarters.
• Commercial sector
-- adhoc networking can be used in emergency or any commercial area (business).
Ex:hip- to- ship adhoc mobile communication.
Personal area network (PAN)
-- adhoc network can be used to
transfer the short –message between
various mobile devices.
Ex:: wireless LAN.
• Benefits from MANET
• Communication cost becomes cheaper.
• Self Network extended.
• Low Cost for building a network.
• Resources sharing.
• Route Discovery in MANET
• Route Reply in MANET
• Data Delivery in MANET
• Route Error (RERR)
• MANET Challenges
• Research Issues
• x-cast routing algorithms.
• QOS supporting model.
• Security , Reliability , availability schemes.
• Internetworking mechanisms.
Conclusion
• Ad Hoc Networks must connect to the Internet
• Group of Mobile Nodes moving together - Network in Motion