Downlink Packets Scheduling in enterprise WLAN

Dong Zhao; Ming Zhu; Ming Xu; Jiannong Cao

doi:10.1109/WCNC.2013.6554757

Downlink Packets Scheduling in enterprise WLAN

Dong Zhao, Ming Zhu, Ming Xu, Jiannong Cao

Research output: Chapter in book / Conference proceeding › Conference article published in proceeding or book › Academic research › peer-review

2 Citations (Scopus)

Abstract

Enterprise WLAN consists of many APs connected to wired backbone network. Conventional DCF mechanism can not completely prevent conflicts between APs which cause large quantities of transmission failure and retransmission overhead. However, to keep compatible with 802.11-compliant clients, it is difficult to discard DCF. In this paper, we proposed a framework called DPS, which incorporates centralized scheduling with DCF. In DPS, downlink packets are not forwarded as soon as they arrived at APs. Instead, a central controller schedules their forwarding. APs still use DCF to send downlink packets according to the controller's instructions. DPS preserves DCF and requires no modifications to 802.11-compliant clients. Under DPS framework, we proposed a scheduling algorithm, ensuring downlink packets be sent with high success rate. In this way, we can significantly reduce transmission failure and retransmission overhead. Experiment results indicated that DPS can significantly improve the performance of enterprise WLAN compared with DCF without any scheduling.

Original language	English
Title of host publication	2013 IEEE Wireless Communications and Networking Conference, WCNC 2013
Pages	1333-1338
Number of pages	6
DOIs	https://doi.org/10.1109/WCNC.2013.6554757
Publication status	Published - 21 Aug 2013
Event	2013 IEEE Wireless Communications and Networking Conference, WCNC 2013 - Shanghai, China Duration: 7 Apr 2013 → 10 Apr 2013

Conference

Conference	2013 IEEE Wireless Communications and Networking Conference, WCNC 2013
Country/Territory	China
City	Shanghai
Period	7/04/13 → 10/04/13

ASJC Scopus subject areas

General Engineering

More information

10.1109/WCNC.2013.6554757

Cite this

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title = "Downlink Packets Scheduling in enterprise WLAN",

abstract = "Enterprise WLAN consists of many APs connected to wired backbone network. Conventional DCF mechanism can not completely prevent conflicts between APs which cause large quantities of transmission failure and retransmission overhead. However, to keep compatible with 802.11-compliant clients, it is difficult to discard DCF. In this paper, we proposed a framework called DPS, which incorporates centralized scheduling with DCF. In DPS, downlink packets are not forwarded as soon as they arrived at APs. Instead, a central controller schedules their forwarding. APs still use DCF to send downlink packets according to the controller's instructions. DPS preserves DCF and requires no modifications to 802.11-compliant clients. Under DPS framework, we proposed a scheduling algorithm, ensuring downlink packets be sent with high success rate. In this way, we can significantly reduce transmission failure and retransmission overhead. Experiment results indicated that DPS can significantly improve the performance of enterprise WLAN compared with DCF without any scheduling.",

author = "Dong Zhao and Ming Zhu and Ming Xu and Jiannong Cao",

year = "2013",

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doi = "10.1109/WCNC.2013.6554757",

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AU - Zhu, Ming

AU - Xu, Ming

AU - Cao, Jiannong

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AB - Enterprise WLAN consists of many APs connected to wired backbone network. Conventional DCF mechanism can not completely prevent conflicts between APs which cause large quantities of transmission failure and retransmission overhead. However, to keep compatible with 802.11-compliant clients, it is difficult to discard DCF. In this paper, we proposed a framework called DPS, which incorporates centralized scheduling with DCF. In DPS, downlink packets are not forwarded as soon as they arrived at APs. Instead, a central controller schedules their forwarding. APs still use DCF to send downlink packets according to the controller's instructions. DPS preserves DCF and requires no modifications to 802.11-compliant clients. Under DPS framework, we proposed a scheduling algorithm, ensuring downlink packets be sent with high success rate. In this way, we can significantly reduce transmission failure and retransmission overhead. Experiment results indicated that DPS can significantly improve the performance of enterprise WLAN compared with DCF without any scheduling.

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Downlink Packets Scheduling in enterprise WLAN

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