P-Persistent CSMA Quiz and Flashcards: Protocol Testing Made Easy

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Questions and Answers

What does CSMA/CA stand for in wireless communication?

Collision Sensing Mobile Access with CD
Carrier Sense Multiple Access with Collision Avoidance (correct)
Contention Slot Multiple Access with Conflict Avoidance
Controlled Spectrum Mobile Allocation with Collision Analysis

What is the purpose of the Distributed inter frame Space (DIFS) in CSMA/CA?

To freeze the backoff counter during transmission
To wait for the end of the current transmission (correct)
To pick a random number of slots to transmit a frame
To announce the beginning of the contention window

What happens if other Mobile Stations (MSs) transmit during the backoff time in CSMA/CA?

The transmitting MS defers its transmission
The receiving MS freezes its backoff counter (correct)
The receiving MS immediately starts its transmission
The transmitting MS increases its backoff counter

When can a Mobile Station (MS) start its transmission in CSMA/CA?

After DIFS period ends (D) Signup and view all the answers

What does CSMA/CA allow terminals to do in case of channel contention?

Wait for a random time and then transmit (D) Signup and view all the answers

In CSMA/CA, why does a Mobile Station defer to another if it senses the medium is busy?

To avoid interference and collisions (C) Signup and view all the answers

What is the main characteristic of p-persistent CSMA protocol?

It transmits with a probability p when the medium is idle (A) Signup and view all the answers

Which special case represents 1-persistent CSMA?

p=1 (A) Signup and view all the answers

What is the tradeoff provided by p-persistent CSMA protocol?

Between persistent and nonpersistent CSMA (B) Signup and view all the answers

At which probability value does the persistent CSMA have to wait for T units before transmitting?

$p=0$ (C) Signup and view all the answers

In terms of throughput, which type of CSMA has the highest efficiency?

$p=1$ persistent CSMA (C) Signup and view all the answers

What happens if the medium is busy in p-persistent CSMA protocol?

Continue to listen until medium becomes idle (C) Signup and view all the answers

What is the main issue when more than one Mobile Station (MS) transmits at the same time on the control channel to BS?

Collision (B) Signup and view all the answers

Which protocol resolves a collision after it occurs in a multiple access system?

CSMA/CD (B) Signup and view all the answers

What type of protocols aim to solve multiple access issues in wireless communication systems?

Contention-based Protocols (B) Signup and view all the answers

In a wireless system, what happens if more than one Mobile Station (MS) attempts to transmit data simultaneously?

Collision (A) Signup and view all the answers

Which protocol is designed for Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) in wireless networks?

Bounded ALOHA (D) Signup and view all the answers

What is the primary issue when several Mobile Stations (MSs) share the same communication channel?

Collisions (B) Signup and view all the answers

Study Notes

CSMA/CA in Wireless Communication

CSMA/CA stands for Carrier Sense Multiple Access with Collision Avoidance.

Distributed Inter Frame Space (DIFS) in CSMA/CA

The purpose of DIFS is to provide a minimum waiting time for a station to sense the channel before transmitting.

Backoff Time in CSMA/CA

If other Mobile Stations (MSs) transmit during the backoff time, the transmission will be delayed.

Transmission in CSMA/CA

A Mobile Station (MS) can start its transmission when the channel is sensed idle for a DIFS period.

Channel Contention in CSMA/CA

CSMA/CA allows terminals to defer transmission to avoid collisions in case of channel contention.

Channel Busy in CSMA/CA

A Mobile Station defer to another if it senses the medium is busy to avoid collision.

p-Persistent CSMA Protocol

The main characteristic of p-persistent CSMA protocol is that a station waits for a random time before transmitting.
A special case of p-persistent CSMA represents 1-persistent CSMA.
The tradeoff provided by p-persistent CSMA protocol is between throughput and delay.

Transmission in p-Persistent CSMA

At a probability value of p, the persistent CSMA has to wait for T units before transmitting.
If the medium is busy in p-persistent CSMA protocol, the transmission is delayed.

Throughput Efficiency in CSMA

1-Persistent CSMA has the highest efficiency in terms of throughput.

Multiple Access Issues

The main issue when more than one Mobile Station (MS) transmits at the same time on the control channel to BS is collision.
The primary issue when several Mobile Stations (MSs) share the same communication channel is multiple access.

Collision Resolution

CSMA/CA is a protocol that resolves a collision after it occurs in a multiple access system.

Multiple Access Protocols

Protocols that aim to solve multiple access issues in wireless communication systems are CSMA, TDMA, FDMA, and CDMA.
MAC (Medium Access Control) protocols are designed to resolve multiple access issues in wireless communication systems.
IEEE 802.11 is a protocol designed for Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) in wireless networks.

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Description

This quiz covers the p-persistent CSMA (Carrier Sense Multiple Access) Protocols. It includes steps for transmitting data when the medium is idle or busy, along with special cases. Test your knowledge on the operation of p-persistent CSMA in wireless and mobile systems.

p-persistent CSMA Protocols

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