MANET

MANET

Characteristics:

• Operating without a central coordinator

• Multi-hop radio relaying

• Frequent link breakage due to mobile nodes

• Constraint resources (bandwidth, computing power, battery lifetime, etc.)

• Instant deployment

Applications:

• Military applications
• Collaborative computing
• Emergency rescue
• Mesh networks
• Wireless sensor networks
• Multi-hop cellular networks
• Wireless Community Network

 Major Issues and Challenges:

 > Hidden terminal problem

 > Exposed terminal problem

   Scenario

 if a txn between S1 and R1 is taking place, node S2 is prevented from transmitting to R2 as it
concludes after carrier sense that it will interfere with the transmission by its neighbor S1.

 > Channel efficiency

 > Access delay and fairness
 > Differential service
 > Realistic mobility modeling
 > power-aware routing
 > Constructing virtual backbone
 > Distinguish contention, packet drop, and noise errors
 > Security
 > Efficient multicasting