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Midterm Question 4

This document explores the Distributed Foundation Wireless Medium Access Control (DFWMAC) in Point Coordination Function (PCF) operation, focusing on the roles of SIFS, PIFS, and NAV in efficient bandwidth allocation among wireless stations. It examines contention-free periods, polling mechanisms, and how bandwidth is evenly distributed when PCF is effectively employed. Key concepts include PIFS and SIFS durations, coordination points, and how wireless stations manage access to shared channels, ensuring fair resource distribution and minimizing congestion.

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Midterm Question 4

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  1. Midterm Question 4

  2. t0 t1 SuperFrame medium busy PIFS SIFS SIFS D1 D2 point coordinator SIFS SIFS U1 U2 wireless stations stations‘ NAV NAV DFWMAC-PCF I

  3. t2 t3 t4 PIFS SIFS D3 D4 CFend point coordinator SIFS U4 wireless stations stations‘ NAV NAV contention free period t contention period DFWMAC-PCF II If only PCF is used and polling is distributed evenly, the bandwidth is also distributed evenly among all polled nodes.

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