MANET
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Mobile ad-hoc networks (MANETs) are multi-hop wireless networks composed of mobile nodes that communicate without a fixed infrastructure, facing challenges like routing, security, and transmission errors. Key applications include personal area networking, military operations, and emergency services, with issues such as limited transmission range, route changes due to mobility, and battery constraints. Although prototype protocols exist, significant challenges remain in designing higher-level protocols and ensuring quality of service.
MANET
- 1. Mobile Ad-Hoc Network Presented by, – Teja Babu Sura – Pavan Kumar
- 2. Mobile Ad-Hoc Network The term MANET (Mobile Ad-hoc Network) refers to a multi hop packet based wireless network composed of a set of mobile nodes that can communicate and move at the same time , without using any kind of fixed wired infrastructure Types of MANET :Vehicular Ad-hoc Networks (VANETs) Internet Based Mobile Ad-hoc Networks (iMANET)
- 3. How MANET works Each device in a MANET is free to move independently in any direction, and will therefore change its links to other devices frequently. Each must forward traffic unrelated to its own use, and therefore be a router. The primary challenge in building a MANET is equipping each device to continuously maintain the information required to properly route traffic.
- 4. Effect Of MANET On The Protocol Stack Application New applications and adaptations(Malicious code) Transport Congestion and flow control(Session hijacking, Flooding) Network Addressing and routing(Link Spoofing, Location disclosure) Data-Link Media access(Malicious Behavior) Physical Transmission errors and interference(Interference, Traffic Jamming)
- 5. Many Applications Personal area networking – cell phone, laptop, ear phone, wrist watch Military environments – soldiers, tanks, planes Civilian environments – – – – taxi cab network meeting rooms sports stadiums boats, small aircraft Emergency operations – search-and-rescue – policing and fire fighting 5
- 6. Challenges Limited wireless transmission range Mobility-induced route changes Battery constraints Ease of snooping on wireless transmissions (security hazard) Broadcast nature of the wireless medium Packet losses due to transmission errors Potentially frequent network partitions 7
- 7. Conclusion Ad hoc networks can be implemented using various techniques like Bluetooth or WLAN for example Although work is being done and prototype protocols are available for experiments mobile ad hoc network still have difficulties. While some basic network control functions and routing procedures have been developed many other issues require attention. Rapidly changing topology, network partitions, higher error rates, collision interference, bandwidth constraints and power limitations together pose new challenge in network control; Especially in the design of the higher level protocols for routing and in implementing applications with quality of service requirements