Consider the sequence of actions within a BSS depicted in Figure 13.14. Draw a timeline, beginning with a period during which the medium is busy and ending with a period in which the CF-End is broadcast from the AP. Show the transmission periods and the gaps. AP1. Beacon2. Data + CF-Poll3. Data + CF-Ack8. CF-End1. Beacon4. Data + CF-Ack+CF-Poll5. Data + CF-ACK8. CF-End1. Beacon6. CF-Poll7. Data (Null)& CF-EndFigure 13.14 Configuration for Problem 13.1Subscriber ASubscriber BSubscriber C

Transmission media means it is a communication channel which carries information from sender to…

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Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Consider the sequence of actions within a BSS depicted in Figure 13.14. Draw a timeline, beginning with a period during which the medium is busy and ending with a period in which the CF-End is broadcast from the AP. Show the transmission periods and the gaps.

AP
1. Beacon
2. Data + CF-Poll
3. Data + CF-Ack
8. CF-End
1. Beacon
4. Data + CF-Ack+CF-Poll
5. Data + CF-ACK
8. CF-End
1. Beacon
6. CF-Poll
7. Data (Null)
& CF-End
Figure 13.14 Configuration for Problem 13.1
Subscriber A
Subscriber B
Subscriber C

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