Found 6 Articles for CSMA

Difference between CSMA/CA and CSMA/CD

Kiran Kumar Panigrahi
Updated on 22-Aug-2022 13:51:02
Both CSMA/CA and CSMA/CD are network protocols for transmission that operate in the Medium Access Control Layer, however there are significant differences in the way they operate. Read through this article to find out more about CSMA/CA and CSMA/CD and how they are different from each other.What is CSMA/CA?CSMA/CA is a network protocol for carrier transmission that stands for Carrier Sense Multiple Access with Collision Avoidance. It works in the same media access control layer as CSMA/CD. This protocol is effective before the collision.Algorithm of CSMA/CAThe algorithm of CSMA/CA is as follows −When a frame is ready, the transmitting station ... Read More

CSMA with Collision Avoidance (CSMA/CA)

Paul Richard
Updated on 30-Jul-2019 22:30:25
Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) is a network protocol for carrier transmission that operates in the Medium Access Control (MAC) layer. In contrast to CSMA/CD (Carrier Sense Multiple Access/Collision Detection) that deals with collisions after their occurrence, CSMA/CA prevents collisions prior to their occurrence.AlgorithmThe algorithm of CSMA/CA is:When a frame is ready, the transmitting station checks whether the channel is idle or busy.If the channel is busy, the station waits until the channel becomes idle.If the channel is idle, the station waits for an Inter-frame gap (IFG) amount of time and then sends the frame.After sending the ... Read More

CSMA with Collision Detection (CSMA/CD)

Rama Giri
Updated on 30-Jul-2019 22:30:25
Carrier Sense Multiple Access with Collision Detection (CSMA/CD) is a network protocol for carrier transmission that operates in the Medium Access Control (MAC) layer. It senses or listens whether the shared channel for transmission is busy or not, and defers transmissions until the channel is free. The collision detection technology detects collisions by sensing transmissions from other stations. On detection of a collision, the station stops transmitting, sends a jam signal, and then waits for a random time interval before retransmission.AlgorithmsThe algorithm of CSMA/CD is:When a frame is ready, the transmitting station checks whether the channel is idle or busy.If ... Read More

P-persistent CSMA protocol

Fendadis John
Updated on 30-Jul-2019 22:30:25
P-persistent CSMA is an approach of Carrier Sense Multiple Access (CMSA) protocol that combines the advantages of 1-persistent CMSA and non-persistent CMSA. Using CMSA protocols, more than one users or nodes send and receive data through a shared medium that may be a single cable or optical fiber connecting multiple nodes, or a portion of the wireless spectrum.In p-persistent CSMA, when a transmitting station has a frame to send and it senses a busy channel, it waits for the end of the transmission, and then transmits with a probability p. Since, it sends with a probability p, the name p ... Read More

1-Persistant CMSA

Rama Giri
Updated on 30-Jul-2019 22:30:25
1-persistent CSMA is an aggressive version of Carrier Sense Multiple Access (CMSA) protocol that operates in the Medium Access Control (MAC) layer. Using CMSA protocols, more than one users or nodes send and receive data through a shared medium that may be a single cable or optical fiber connecting multiple nodes, or a portion of the wireless spectrum.In 1-persistent CSMA, when a transmitting station has a frame to send and it senses a busy channel, it waits for the end of the transmission, and transmits immediately. Since, it sends with a probability 1, the name 1 – persistent CSMA is ... Read More

Non-persistent CSMA protocol

Fendadis John
Updated on 30-Jul-2019 22:30:25
Non-persistent CSMA is a non – aggressive version of Carrier Sense Multiple Access (CMSA) protocol that operates in the Medium Access Control (MAC) layer. Using CMSA protocols, more than one users or nodes send and receive data through a shared medium that may be a single cable or optical fiber connecting multiple nodes, or a portion of the wireless spectrum.In non-persistent CSMA, when a transmitting station has a frame to send and it senses a busy channel, it waits for a random period of time without sensing the channel in the interim, and repeats the algorithm again.AlgorithmThe algorithm of non-persistent ... Read More
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