DCF meaning in Telecommunication ?

tuteeHUB earn credit +10 pts

Answer:

What is Distributed Coordination Function mean?

Distributed coordination function (DCF) is the fundamental medium access control (MAC) technique of the IEEE 802.11-based WLAN standard (including Wi-Fi). DCF employs a carrier-sense multiple access with collision avoidance (CSMA/CA) with binary exponential backoff algorithm.

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:

B a c k o f f T i m e = r a n d o m ( ) × a S l o t T i m e {\displaystyle \mathrm {BackoffTime} =\mathrm {random} ()\times \mathrm {aSlotTime} }

DCF also has an optional virtual carrier sense mechanism that exchanges short Request-to-send (RTS) and Clear-to-send (CTS) frames between source and destination stations during the intervals between the data frame transmissions.

DCF includes a positive acknowledge scheme, which means that if a frame is successfully received by the destination it is addressed to, the destination needs to send an ACK frame to notify the source of the successful reception.

DCF does not solve the hidden terminal and/or exposed terminal problem completely, it only alleviates the problem through the use of RTS and CTS, and recommends the use of a larger carrier sensing range.

DCF is defined in the IEEE 802.11 standard and is the de facto default setting for Wi-Fi hardware.

802.11 DCF consumes a significant amount of airtime, 802.11 control messages usually convey very little information. For example, an ACK message can take up to 60 μs to transmit completely, which includes an amount of airtime sufficient to transmit 3240 bits at 54 Mbit/s, during which it conveys a single bit of relevant information.

The IEEE 802.11 standard also defines an optional access method using a point coordination function (PCF). PCF allows the access point acting as the network coordinator to manage channel access. The IEEE 802.11e amendment to the standard enhances the DCF and the PCF, through a new coordination function called Hybrid Coordination Function (HCF).

reference
Full Form Category
Discretionary Cash Flow Accounts and Finance
Discounted Cash Flow Accounts and Finance
Roseau Airport Code
Decosimo Corporate Finance Business
Deloitte Corporate Finance Business
Designated Collection Facility Community
Delaware Community Foundation Community
Disciples of Christ Fellowship Community
Dorothy Canfield Fisher, children's book author Community
Department of Children and Families Community
Downtown Community Fellowship Community
Davis Christian Fellowship Community
Development Cooperation Forum Community
Disengage ConFirmation Computer and Networking
Downlink Center Frequency Computing
Doesn't Care For .... Computing
Data Count Field Computing
Digital Camera File Computing
Design Rule for Camera File Computing
Dce Configuration Computing
Dispersion Compensating Fiber Computing
Decentralized File Computing
Disk Copy Fast Computing
Data Communications Function Computing
Distributive Computing Facility Computing
Data Clarification Form Computing
Discrete Content Format Computing
Digital Content Forum Computing
Digitally Controlled Filter Electronics
Disk Image File File Type
Department for Children and Families General
Dorothy Canfield Fisher General
Destroying childrens futures General
Destroying Children and Families General
Discounted Cash Flows General
Diopter Central Focusing General
Deswik CAD File General
Docetaxel cisplatin and fluorouracil General
Digital Competence Framework General
Data Change Form General
Department of Children Families General
Data Computation File General
Department of Children and Family General
Dead Carbon Fraction General
Drag Coefficient General
Doppio Circuito Frenante General
Dyane Club de France General
Defiant Class Flotilla General
Dumb Compressed File General
Design rule for Camera File system General
Dach Centre Focussing General
Dodge Challenger Forum General
de Lorean Club of Florida General
Distributed Coordinated Function General
Drivers Club Festival General
Direct Consular Filing Governmental
Data Clarification request Form Governmental
Dwarf Clawed Frog Medical
Dose Conversion Factor Medical
Document Composition Facility Military and Defence
Distributed Content Framework Networking
Douglas County Firearms Regional
Cane Field Airport, Roseau, Dominica, West Indies Regional
Dynamic Contact Form Softwares
Draft Capture File Softwares
Delayed Catastrophic Failure Space Science
Data Capture Facility Space Science
Dallas Cowboys Football Sports
Distributed Coordination Function Telecommunication

Report

Posted on 22 Dec 2024, this text provides information on Miscellaneous in Telecommunication related to Telecommunication. Please note that while accuracy is prioritized, the data presented might not be entirely correct or up-to-date. This information is offered for general knowledge and informational purposes only, and should not be considered as a substitute for professional advice.

Take Quiz To Earn Credits!

Turn Your Knowledge into Earnings.

tuteehub_quiz

Write Your Comments or Explanations to Help Others



webstory list tuteehub
Miscellaneous in Telecommunication
webstory list tuteehub
Miscellaneous in Telecommunication


Ever curious about what that abbreviation stands for? fullforms has got them all listed out for you to explore. Simply,Choose a subject/topic and get started on a self-paced learning journey in a world of fullforms.

Important Telecommunication Links

open app imageOPEN APP