Content deleted Content added
m Added non-breaking space to non-template file size, frequency, bitrate, and bandwidth values (via WP:JWB) |
GreenC bot (talk | contribs) Move 2 urls. Wayback Medic 2.5 per WP:URLREQ#ieee.org |
||
Line 6:
DCF requires a station wishing to transmit to listen for the channel status for a [[DIFS]] interval. If the channel is found busy during the DIFS interval, the station defers its transmission. In a network where a number of stations contend for the wireless medium, if multiple stations sense the channel busy and defer their access, they will also virtually simultaneously find that the channel is released and then try to seize the channel. As a result, collisions may occur. In order to avoid such collisions, DCF also specifies random backoff, which forces a station to defer its access to the channel for an extra period. The length of the backoff period is determined by the following equation:
<math>\mathrm{Backoff Time} = \mathrm{random}() \times \mathrm{aSlotTime}</math><ref>{{Cite web|title=IEEE 802.11-2016 - IEEE Standard for Information technology--Telecommunications and information exchange between systems Local and metropolitan area networks--Specific requirements - Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications|url=https://standards.ieee.org/
A few features about DCF:
| |||