RTS/CTS Mechanism

[sureshbachu16]

Guys,

Could you please explain briefly about RTS/CTS mechanism.

when an environment use RTS/CTS mechanism?

when CTS to self frames occurs?

How CSMA/CA mechanism involved in RTS /CTS mechanism?

Thanks,

Suresh

[Stephen Rodriguez]

http://bit.ly/1A0cQCu

[Leo Laohoo]

http://bit.ly/1A0cQCu

ROFL!

Steve, if the OP gets a "D" in his schoolwork, you're going into big trouble!

[sureshbachu16]

Thanks for the reply

[sureshbachu16]

Hi Stephen,

Thanks for the reply.

[Andrew Hrycaj]

:)

[sureshbachu16]

Hi Stephen,

I have few doubts to clarify.
Can you please clarify the below questions.

1. What happen when the rts packet destroy or collide with another packet.
2. What is difference b/w DCF & EDCA.
3. What is the time duration for “cts-to-self”.
4. What is the max frame size of the rts & cts & cts-to-self.
5. In which 802.11 standard does rts and cts are implemented.
6. Does 802.11b supports rts and cts. If not then which CSMA/CA is used.

Thanks in advance.

Thanks,

Suresh.

[George Stefanick]

1. What happen when the rts packet destroy or collide with another packet.

When the RTS doesn't reach the radio the client will not get a CTS and will retry the RTS frame again.

1. What is difference b/w DCF & EDCA.

DCF doesn't support QoS and is considered equal access tocall. QoS is supported in HCF. EDCA work with HCF and QoS. It is the mechanism that supports cW sizes.  

1. What is the time duration for “cts-to-self”.

Depends on really on how long the client needs the medium for. If it send large frames @ 1500 bytes at 1 PHY, it will need more time of course. 

1. What is the max frame size of the rts & cts & cts-to-self.

Not sure, but they are small. These are control frames and have no payload. 

1. In which 802.11 standard does rts and cts are implemented.

RTS/CTS is used when the protection mechanism is used for example b clients on a g/n network. Its also used in the new 11ac as well.

1. Does 802.11b supports rts and cts. If not then which CSMA/CA is used
2. I can't recall if b does I want to say yes. CSMA/CA is more about the overall mechanics not RTS/CTS.