EC2050 MOBILE ADHOC NETWORKS PDF

EC Mobile Ad hoc Networks. Subject Code / Name: DEPARTMENT OF ELECTRONICS AND COMMUNICATION ENGINEERING QUESTION BANK. B.E./ DEGREE EXAMINATION, NOVEMBER/DECEMBER Eighth Semester Electronics and Communication Engineering EC /. EC MOBILE ADHOC NETWORKS. L T P C. 3 0 0 3. UNIT I. INTRODUCTION. 9. Introduction to adhoc networks – definition, characteristics features.

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List the issues of designing a MAC protocol for ad hoc networks. Efficient utilization of energy 2.

Military applications and battlefields b. Explain with an example. What is the impact of the failure of proxy nodes in split- TCP? It employs radio frequency technology for communication. Explain COA, reverse tunneling and route optimization.

Proactive Reactive 1 Route is pre-established Route establishment is on-demand Route discovery by some global 2 Continuously discover the routes search Updates topology information table 3 No information update is done periodically longer delay due to latency of route 4 No latency in route discovery discovery Large capacity is needed to update 5 Large capacity is not needed network information A lot of routing information may May not be appropriate for real-time 6 never be used communication 7 Eg: Contention based protocols with scheduling mechanisms 4.

Distinguish between shadowing and reflection of signal propagation. What are the advantages? What are the two types of protocols used to handle multiple access issues? How is routing table constructed in fisheye state routing protocol? List out some indoor propagation models. Explain the characteristics of wireless channels.

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The contention based protocols can be classified into two groups according to the ways collisions are resolved. Distinguish between shadowing and reflection of signal propagation. Explain the major challenges that a routing protocol designed for adhoc wireless networks face. What is the choice between proactive routing protocol and reactive routing protocol? List the propagation mechanism experienced by radio wave. The reasons that lead to the quick power drain of nodes in mobile Ad hoc network are a Using the same route for a longer duration leads to partitioning of the network.

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List the approaches for power aware routing protocol. HRMA SRMA A multichannel MAC protocol which is based on half-duplex, very slow TDMA frame based dynamic reservation 1 frequency-hopping spread spectrum MAC protocol FHSS radios Time slot reservation protocol where each Nodes are allocated different time slots so 2 fixed time slot is assigned a frequency that transmissions are collision free channel Uses a reservation and handshake mechanism to enable a pair of Nodes use a collision-avoidance 3 communicating nodes to reserve a handshake mechanism and a soft frequency hop, thereby guaranteeing reservation mechanism collision-free data transmission Developed with the main objective of supporting integrated services of real-time 4 Supports real time transmission and non-real-time application in ad hoc networks Differentiate proactive and reactive protocols.

This leads to increased delay and increased mobild of packet losses even when all nodes restrict their mobility to a small region. What is cross layer feedback? Based on routing information update mechanism how the routing protocols are classified? Give the classifications of MAC protocols.

Comment on the use of natural language passwords directly for cryptographic algorithms. The PO decides the optimizing action to be taken based on the events occurring at the various layers and the current state of the protocol layer which is to be modified. April Prepared by A.

Help Center Find new research papers in: Portability, weight, size of the hand held devices 4. Why does TCP not perform well in adhoc wireless network? This is especially important for interactive sessions between user applications.

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MAC protocol should consider the constraint of ad hoc networks for time critical applications c Hidden and exposed terminal problem d Synchronization: What are the factors adboc affect effective cross layer design?

Contention based protocols 2. Also highlight how efficiency is improved through this model. List the challenges faced by WLAN industry. What is an adhoc network? Minimize Variance in Node Power Levels 4. List the different types of fading.

EC MOBILE ADHOC NETWORKS SYLLABUS ~ Online Virtual-Tutor

What do you mean by contention based protocols with scheduling mechanism? Networos is limitation in availability of power for operation. Selection of optimal transmission power Prepared by A.

What do you mean by contention based protocols? Differentiate proactive and reactive routing protocols. With any five major reasons, analyze why TCP is exposed to significant throughput degradation in ad hoc networks.

The presence of dynamic and adaptive routing protocols enables quick formation of ad hoc networks and is suitable for emergency situations like natural disasters, spontaneous meetings or military conflicts. Discuss the Pros and Cons of a routing protocol that uses GPS nrtworks for an Adhoc wireless Network for search and rescue operation. Maximize Network Connectivity 3.

List the network security requirements. The different types of fading are 1. Adjoc features of wireless LAN are a Power management to save the battery power.