On efficient multipolling with various service intervals for IEEE 802.11e WLANs

Author

Chou, Chin-Wen ; Lin, Kate Ching-Ju ; Lee, Tsern-Huei

Author_Institution

Res. Center for Inf. Technol. Innovation, Acad. Sinica, Taipei, Taiwan

fYear

2011

fDate

4-8 July 2011

Firstpage

1906

Lastpage

1911

Abstract

Hybrid coordination function (HCF) is proposed in IEEE 802.11e standard to support quality of service (QoS). HCF defines two channel access mechanisms; one of them is HCF controlled channel access (HCCA) designed for contention free transmission. In HCCA, each QoS-enhanced station (QSTA) obtains polled transmission opportunity (TXOP) from the hybrid coordinator (HC), which is in charge of scheduling the channel access and responding the poll messages to each QSTA. However, forwarding polling messages causes a significant overhead and degrades the channel utilization of data transmission. The goal of this work is to develop an efficient multipolling scheme that can reduce the overhead of polling messages. The simulation results show that the proposed algorithm can reduce the control overhead and, thus, improve the channel utilization significantly.

Keywords

quality of service; wireless LAN; HCCA; HCF controlled channel access; IEEE 802.11e WLAN; IEEE 802.11e standard; QSTA; QoS-enhanced station; TXOP; data transmission; hybrid coordination function; multipolling scheme; polled transmission opportunity; polling message forwarding; quality of service; service intervals; Bandwidth; Bit rate; Delay; IEEE 802.11e Standard; Quality of service; Schedules; Throughput; 802.11e; Multipoll; QoS;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications and Mobile Computing Conference (IWCMC), 2011 7th International

Conference_Location

Istanbul

Print_ISBN

978-1-4244-9539-9

Type

conf

DOI

10.1109/IWCMC.2011.5982825

Filename

5982825