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An ad Hoc network using IEEE802.11 has 4 nodes: N1, N2, N3, N4. Assume that SIFS is 1 unit of time, PIFS 2 units of time, DIFS 3 units of time, and slot time is 2 (these values are not the real values but are taken to simplify the packets scheduling). Assume that at the beginning the channel is idle (no transmission), and that at instant 1 (time instant) N2 has a packet to be sent to N4. At instant 2, both N1 and N3 have a packet to be sent to N4. Assume that the random number generator (for backoff) will give the following values for N1: 2, 5, ...; for N2: 4, 3, ...; and for N3: 1, 4, .... Assume that we don't use RTS/CTS or fragmentation, and that all data packets have the same length: 6 units of time and that the Ack packet has length 3 units of time. Furthermore the channel Bit Error Rate is assumed to be 0. Show the execution of the DCF mode of IEEE 802.11. 2. In general terms, what application areas are supported by Bluetooth? 3. What are some key characteristics that distinguish fourth-generation cellular systems from third-generation cellular systems? 4. Read the attached paper, "GPS: Location-Tracking Technology," by R. Bajaj, s. Ranaweera, and D. P. Agrawal, find out the limitations of GPS, which introduce error to GPS position calculations and prevent us from achieving the best possible accuracy.
identifies the cost of computer components to configure a computer system (including all peripheral devices where needed) for use in one of the following four situations:
Compare how the gestures data is generated and represented for interpretation in each of the following input devices. In your comparison, consider the data formats (radio waves, electrical signal, sound, etc.), device drivers, operating systems suppo..
Assignment : Cores on Computer Systems: Differentiate between multiprocessor systems and many-core systems in terms of power efficiency, cost benefit analysis, instructions processing efficiency, and packaging form factors.
Prepare working solutions in Excel that will manage the annual budget
Research paper in relation to a Software Design related topic
Describe the forest, domain, OU, and trust configuration for Bluesky. Include a chart or diagram of the current configuration. Currently Bluesky has a single domain and default OU structure.
Construct a truth table for the Boolean expressions ABC + A'B'C' ABC + AB'C' + A'B'C' A(BC' + B'C)
Evaluate the cost of materials
Depending on how comfortable you are with using the MARIE simulator after reading
What is the main advantage of using master pages. Explain the purpose and advantage of using styles.
Explain the two approaches to packet delivery by the network layer in Distributed Systems. Describe the three fundamental models of Distributed Systems
Distinguish between caching and buffering The failure model defines the ways in which failure may occur in order to provide an understanding of the effects of failure. Give one type of failure with a brief description of the failure
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