TEST1 REVIEW QUESTIONS (10/14/2014)

  1. What are the differences between wireless and wireline networks
  2. What are the differences between different wireless media
  3. What are the differences between centralized and ad-hoc wireless networks
  4. List different types of cellular wireless network elements and their functions
  5. List differences between soft and hard handoff
  6. What are the SDU functions – select/combine -distribute?
  7. List differences between macro and micro mobility?
  8. Describe procedures and steps (with an example) in micro-mobility management
  9. What is a ping-pong effect during micro-mobility. How do you avoid this
  10. Compare wireless network elements (see the list below for more details) with wire line network components like access devices, access router, edge router, core router, gateways Comparison interms of functions, bandwidth, physical distance and session setup
  11. Mobile Station
  12. Base Transceiver System
  13. Base Station Controller
  14. Mobile Switching Center
  15. Packet Inter-Working Function
  16. What are the differences between wireless and wire line networks in terms of
  17. QoS
  18. Transmission rates
  19. OA & M (Operation, Administration & Maintenance)
  20. Security
  21. Give examples for bandwidth for
  22. BTS-BTS
  23. BTS-BSC
  24. BSC-BSC
  25. BSC-MSC
  26. MSC-MSC
  27. Different the steps in handoff process between two base stations (describe with anevent flow.
  28. We want to provide a cellular communication service to downtown Dallas.
  29. Total available spectrum: 100Mhz
  30. Bandwidth needed per user: 30Khz
  31. Frequency reuse factor = 5

Calculate the no. of subscribers you can support if you have 20, 40, 60 BTSes (all the three cases). Give crisp answers (numerical wherever applicable) to each case. Clearly state any assumptions

20 BTS / 40 BTS / 60 BTS
No. of subscribers
  1. State two differences between shared memory and pipe
  2. What is the method to be used to destroy the shared memory segment? Specify along with parameters.veston@10am
  3. What do you do if there are any concurrency issues(multiple updates at a time) in shared memory?
  4. What do you mean by blocked read and write in pipes?
  5. What are the differences between full duplex and half duplex pipes?
  6. State two benefits and limitations of pipes
  7. Can we use pipes to establish a communication between two processes on two different machines? If yes how
  8. What is the approximate size of the RF frame
  9. What is the difference between “blank & burst” and “dim and burst” in signaling/control messages
  10. What is a frequency reuse factor ? How do you use it
  11. List three kinds of registrations
  12. What is the difference between micro and macro mobility
  13. What is the difference between soft and hard hand off
  14. List and explain two performance parameters during hand off
  15. Explain the difference between close loop and open loop power control
  16. What are the three performance measures for the quantifying the QoS
  17. What are the typical QoS parameters for voice, data and video ?
  18. What are the differences between 2G, 3G and 4G networks ??
  19. What are the functional differences between BTS and eNode
  20. What are the functional differences between BSC and SGW
  21. What are the functional differences between MGW and MSC
  22. List the states in the state diagram in project1 and HW1. If we want to add new services for the cellular network, do you develop a new state diagram or update the existing state diagram for the connection management (use project1 state diagrams as examples).