HW12_network - scheme in (a) requires a guard band between...

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Polytechnic University, Dept. Electrical and Computer Engineering EE3414 Multimedia Communication System I Spring 2006, Yao Wang __________________________________________________________________________________________________ Homework 12 (Communications Network) Reading Assignment: 1) A. Leon-Garcia and I. Widjaja, Communication networks, sections 1.1, 1.2.1, 1.3. 2) William Stallings, Data and Computer Communications, 7 th edition, pages 298-303, 318-326. Written Assignment : 1. Consider a channel with bandwidth W=1 MHz and SNR =20 dB, and we want to allocate this channel among M=10 users. a. What bit rate is available to each user if we divide the entire channel into M channels of equal bandwidth. b. What bit rate is available to each user if the entire frequency band is used as a single channel and TDM (time division multiplexing) is applied? c. How does the comparison of (a) and (b) change if the FDM (frequency division multiplexing)
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Unformatted text preview: scheme in (a) requires a guard band between adjacent channels? Assume the guard band is 10% of the channel bandwidth. 2. How does a broadcast communication network work? Give an example of the service provided by broadcast communication networks. 3. Consider a network consisting of N nodes. Each node is connected to all the other N-1 nodes by a direct link. How many links are there in the network? Explain why a typical network with a large number of nodes is not built this way. 4. Compare the circuit switching, datagram packet switching, and virtual circuit switching. Solution: 5. What type of network the telephone system is (in terms of switching and connection type)? 6. Describe the processes involved inside the network in making a telephone call. 7. Why are standards needed in communication networks?...
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This note was uploaded on 01/22/2012 for the course EE 3414 taught by Professor Wang during the Spring '06 term at NYU Poly.

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