Start networking and exchanging professional insights

Register now or log in to join your professional community.

Follow

What is RTS and CTS in WLAN?

user-image
Question added by Vijay Pratap singh , network consultant , korou Info services Pvt. Ltd.
Date Posted: 2015/10/22
Khalid Anwar
by Khalid Anwar , IT Support Engineer , SANKYU

1.real-time strategy, RTS is a computer game where actions occur immediately rather than giving each player a turn or waiting for an opponent to finish their action. Some examples of RTS games are Age of Empires, StarCraft, WarCraft.

2.Common type system (CTS) is an important part of the runtimes support for cross language integration

3.A wireless local area network (WLAN) is a wireless distribution method for two or more devices. WLANs use high-frequency radio waves and often include an access point to the Internet

Md. Ekramul Kabeer
by Md. Ekramul Kabeer , Manager, Transmission , BDCOM ONLINE LIMITED.

RTS/CTS (Request To Send / Clear To Send):

 This is the optional mechanism used by the 802.11 wireless networking.

This protocol is using to reduce collisions introduced by hidden nodes problem.

karthikeyan p
by karthikeyan p , Technical Lead , HCL Technologies

It means Request-to-send and Clear-to-send . when stations are communicating each other it will be used inorder to avoid collision

karuna karan
by karuna karan , Network Engineer , Sri Ramachanra Medical Center & University

REQUEST SEND AND CLEAR SEND ITS STANDS FOR RTS AND CTS ACTUALLY ITS FLOW CONTROL MACHANISM OF NETWORK FIELD.

DABIN KLARENCE CAPARAS
by DABIN KLARENCE CAPARAS , Jr. Technical Staff , CNN PHILIPPINES

RTS (Request to Send) & CTS (Clear to Send) . Sender request to reciver with RTS packets and Reciver response with CTS packets.

MUHAMED SHIBIL THOTTATHIL
by MUHAMED SHIBIL THOTTATHIL , IT Systems Administrator , Beyond Trading and Contracting

RTS (Request to Send) & CTS (Clear to Send) was used to avoid frame collisions in the hidden node problem and was used by the 802.11 networking protocol as an optional mechanisam. Modern RTS & CTS includes acknowledgments and does not solves exposed node problem which was solved earlier.

mohammad mohib
by mohammad mohib , Senior Executive - Systems , Be Rich Ltd

RTS and CTS work with data transmition medium. Sender request to reciver with RTS packets and Reciver response with CTS packets.

Abdul  Wahab
by Abdul Wahab , Internee , Tec Pvt. Ltd

RTS (Request to Send) & CTS (Clear to Send) was used to avoid frame collisions in the hidden node problem and was used by the 802.11 networking protocol as an optional mechanisam. Modern RTS & CTS includes acknowledgments and does not solves exposed node problem which was solved earlier.

The RTS frame contains five fields, which are:

  1. Frame Control
  2. Duration
  3. RA (Receiver Address)
  4. TA (Transmitter Address)
  5. FCS

The CTS frame contains four fields, which are:

  1. Frame Control
  2. Duration
  3. RA (Receiver Address)
  4. FCS

The ACK frame contains four fields, which are:

 

  1. Frame Control
  2. Duration
  3. RA (Receiver Address)
  4. FCS

adil abdullah
by adil abdullah , support staff , National University of Sciences And Technology Islamabad

Request to Send (RTS) and (CTS) clear to send is optional mechanism by 802.11 wireless networking protocol to reduce frame collision .or

RTS/CTS is an additional method to implement virtual carrier sensing in (CSMA/CA). By default, 802.11 relies on physical carrier sensing only which is known to suffer from the hidden node problem.

 

RTS/CTS packet size threshold is 0–2347 octets. Typically, sending RTS/CTS frames does not occur unless the packet size exceeds this threshold. If the packet size that the node wants to transmit is larger than the threshold, the RTS/CTS handshake gets triggered. Otherwise, the data frame gets sent immediately.

The RTS frame contains five fields, which are:

1.      Frame Control

2.      Duration

3.      RA (Receiver Address)

4.      TA (Transmitter Address)

5.      FCS

The CTS frame contains four fields, which are:

1.      Frame Control

2.      Duration

3.      RA (Receiver Address)

4.      FCS

The ACK frame contains four fields, which are:

1.      Frame Control

2.      Duration

3.      RA (Receiver Address)

4.      FCS

 

 

 

Javeed Shaik
by Javeed Shaik , Tech lead , CSS corp Pvt Ltd

Legacy devices  will not be able to read data transmission is being done by advanced 802.11bands due to the difference in the modulation technology. For example 802.11b clients will not be able to understand 802.11g transmission. These devices may try to communicate with the AP, which would eventually cause for a collision. Hence, RTS/CTS will be sent by 802.11g clients and the AP with lower data rates, which would be readable to 802.11b clients. So they can update their NAV with the duration for the current transmission before it tries to gain the medium.

 

The 802.11AC also sends beacon/RTS/CTS with lower data-rates so that 802.11a/n can read them.

hamza essaadi
by hamza essaadi , specialise TECHNICIEN , INTELCOM

RTS/CTS in action

If you enable RTS/CTS on a particular station, it will refrain from sending a data frame until the station completes a RTS/CTS handshake with another station, such as an access point. A station initiates the process by sending a RTS frame. The access point receives the RTS and responds with a CTS frame. The station must receive a CTS frame before sending the data frame. The CTS also contains a time value that alerts other stations to hold off from accessing the medium while the station initiating the RTS transmits its data.

 

More Questions Like This

Do you need help in adding the right keywords to your CV? Let our CV writing experts help you.