cp5601t9 - B is the total bandwidth available for the...

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CP5610 tutorial 9 (from textbook chapter 4,6) 6.42. Use IEEE 802.3 and IEEE 802.11 to discuss three differences between wired and wireless LANs. 6.44. Consider the distributed coordination function in IEEE 802.11. Suppose that all packet transmissions are preceded by a RTS-CTS handshake. Find the capacity of this protocol following the analysis used for CSMA-CD. 6.45. Suppose one station sends a frame to another station in an IEEE 802.11 ad hoc network. Sketch the data frame and the return ACK frame that are exchanged, showing the contents in the relevant fields in the headers. 6.47. Why is error control (ARQ and retransmission) included in the MAC layer in IEEE 802.11 and not in IEEE 802.3? 4.62 Consider a cellular telephone system with the following parameters:
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Unformatted text preview: B is the total bandwidth available for the system for communications in both directions; b is the bandwidth required by each channel, including guard bands; R is the re-use factor; and a is the fraction of channels used for set up. a. Find an expression for the number of channels available in each cell. b. Evaluate the number of channels in each cell for the AMPS system. Q: Considering the process of VLR updating HLR with information about the mobile's current location, what are the pros and cons of providing MSRN as opposed to the address of the VLR to HLR? Q: Consider two mobile nodes in a foreign network having a foreign agent. Is it possible for two mobile nodes to have the same COA in mobile IP? Q: Explain "opportunistic scheduling" in WiMAX...
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