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5.5. PROBLEMS

  1. Describe a common method used in alleviating the hidden terminal problem at the MAC layer.

  2. How is the loop-free property ensured in on-demand routing protocols? (Hint: On-demand routing protocols do not maintain network topology information and obtain the necessary path as and when required by using a connection-establishment process.)

  3. How is the loop-free property ensured in table-driven routing protocols? (Hint: In table-driven routing protocols, nodes maintain the network topology information in the form of routing tables by periodically exchanging routing information.)

  4. Identify and elaborate some of the important issues in pricing for multi-hop wireless communication.

  5. What is replay attack? How can it be prevented?

  6. Why is power management important for ad hoc wireless networks?

  7. What are the trade-offs to be considered in the design of power management schemes?

  8. What role does the routing protocol play in the provisioning of QoS guarantees for ad hoc wireless networks?

  9. What kind of multiple access technology is suitable in (a) a military ad hoc network environment, and (b) a home ad hoc network environment?

  10. Referring to Figure 5.5, a mobile station (node) moving at high speeds would experience frequent handoffs. Discuss the pros and cons of using MobileIP for address and service discovery.

  11. Referring to Figure 5.5, what is the rate of handoffs that a mobile node experiences when it moves at a speed of 144 Km/hour, assuming that the relay node's transmission range (radius) is 500 m.

  12. Discuss the pros and cons of a routing protocol that uses GPS information for an ad hoc wireless network for search-and-rescue operations.

  13. List the major advantages of the ad hoc wireless Internet.


  

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