Wireless Media Access Control (Slide 5)
Three values of IFS are used:
- SIFS
- Short IFS is used for all immediate response actions.
- Upon reception of a frame ack frames are sent after a SIFS delay.
- PIFS
- Point coordination function IFS is used for central access control.
- DIFS
- Distributed coordination function IFS is used as a minimum delay for asynchronous frames contending for access.