1. Make money out of innovative services is one of main reasons behind the large attention given to mobile computing, explain how this has been applied with concentration on cellular networks. 2. Deliver a brief comparison between wire-line networks and wireless networks, emphasizing on wireless networks limitations. 3. Infrastructure topology of a wireless network is considered more controllable, why? Demonstrate your answer with existing practical examples. 4. Explain the power consumption-size issue of a mobile device. What line coding is used for? Explain a Manchester line coding technique. Describe main spread spectrum transmission techniques and their advantages. 5. Discuss different models of path loss in a physical wireless channel. Explain why signal may arrive at a receiver from different paths. How a receiver can resolve inter-sample interference problem? 6. What is difference between PSK and QAM modulation techniques Suppose a channel bandwidth is 10kbps and data is modulated using 8PSK mechanism, what is the maximum throughput? 7. Write a comparison among FDMA, TDMA and CDMA technologies. 8. Expose main differences in architecture between GPRS and EDGE. 9. What are main functions and operations of radio resource management layer in GSM? What enhancements have added to it in 3G networks? 10. What is Handoff management? List three metrics that can be used to make the handoff decision. Briefly explain how the ping-pong problem can be avoided? Describe different parts composing the Network and Switching Subsystem (NSS) in GSM. List required steps to register a Mobile Station in a GSM. Illustrate the GSM components involved in the registration procedure. 11. Explain how frequency reuse in cellular wireless network topology increases the number of simultaneous users that can be supported by the network. In cellular networks: cells have different size, why Support your answer with different cell types. 12. Discuss the main goals which IEEE 802.11x are designed for? 13. Explain the Agent Discovery mechanism used in Mobile IP to support the mobility of Internet nodes. 14. Discuss the techniques used in location depending services. 15. Why IEEE 802.11a and IEEE 802.11b wireless cards cannot talk to each other? 16. Why does GPRS throughput not reaching its assumed maximum (170kbps)?

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