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A Performance Investigation of the Modified PCF with Priority Scheme

Publiceringsår: 2005
Språk: Engelska
Sidor: 2-9
Publikation/Tidskrift/Serie: ECTI Transactions
Volym: 3
Nummer: 1
Dokumenttyp: Artikel i tidskrift
Förlag: Electrical Engineering/Electronics, Computer, Communications and Information Technology Association (ECTI)


A modified version of the point coordination function

(PCF) in the IEEE 802.11 standard called Modified

PCF has been introduced as an approach to improve

channel utilization over the standard. It has

been shown in our previous work that the utilization

of the wireless channel can be significantly improved.

In this paper, we investigate the performance

of the Modified PCF when it is applied with a priority

scheme to support prioritization for different traffic

types such as interactive voice and video and realtime

data. The investigation is done via simulation

method. To illustrate the efficiency of the priority

scheme, we compare its simulation results with some

standardized protocols: the distributed coordination

function (DCF), the enhanced distributed channel access

(EDCA), and the standard PCF, and our previously

proposed protocol: the Modified PCF without

priority scheme. The simulation results show that

Modified PCF with priority scheme can provide better

quality of service (QoS) support to different traffic

types and also support a higher number of stations

which carry data traffic than the previous proposals.


  • Electrical Engineering, Electronic Engineering, Information Engineering


  • ISSN: 1685-9545

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