An Opportunistic Backoff Scheme for Dense IEEE 802.11 WLANs
(2016) IEEE Global Communication Conference (GLOBECOM), 2015- Abstract
- In dense deployments, the performance of IEEE 802.11 Wireless Local Area Networks (WLANs) depends on the development of efficient contention resolution mechanisms since the collision probability can be high even with low number of users with the current 802.11 MAC mechanism. Also, the current 802.11 MAC is not opportunistic in the sense that it does not consider channel quality and traffic load of users, which can greatly degrade the network capacity. In this paper, we propose a new backoff scheme which performs well for dense networks resulting in low collision probability. Also, our backoff scheme opportunistically gives higher priority to users with high traffic load and better channel conditions, and thus reduces unnecessary... (More)
- In dense deployments, the performance of IEEE 802.11 Wireless Local Area Networks (WLANs) depends on the development of efficient contention resolution mechanisms since the collision probability can be high even with low number of users with the current 802.11 MAC mechanism. Also, the current 802.11 MAC is not opportunistic in the sense that it does not consider channel quality and traffic load of users, which can greatly degrade the network capacity. In this paper, we propose a new backoff scheme which performs well for dense networks resulting in low collision probability. Also, our backoff scheme opportunistically gives higher priority to users with high traffic load and better channel conditions, and thus reduces unnecessary contention. We analytically show that the performance of our backoff algorithm can be pushed to the maximum throughput in exchange for longer backoff delay, which is compensated with reduced number of collisions. We evaluate our algorithm in OMNeT++, and show that compared to the legacy 802.11 Distributed coordination Function (DCF) the aggregated network throughput can be increased up to 70\% by using our algorithm. Also, compared with legacy DCF, the maximum number of supportable users is much higher and the end-to-end delay performance is better with our backoff scheme for dense scenarios under the same traffic conditions. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/8053221
- author
- Karaca, Mehmet LU ; Zhang, Zhi LU and Landfeldt, Björn LU
- organization
- publishing date
- 2016
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- keywords
- IEEE 802.11, dense networks, opportunistic 802.11 DCF
- host publication
- Proc. of the IEEE GLOBECOM'15 WS Enabling Technologies in Future Wireless Local Area Network (ETFWLALN)
- article number
- 7413974
- conference name
- IEEE Global Communication Conference (GLOBECOM), 2015
- conference location
- San Diego, California, United States
- conference dates
- 2015-12-06 - 2015-12-10
- external identifiers
-
- scopus:84971229218
- ISBN
- 9781467395267
- DOI
- 10.1109/GLOCOMW.2015.7413974
- project
- ELLIIT LU P01: WP2 Networking solutions
- language
- English
- LU publication?
- yes
- id
- 541667cf-2587-4007-af71-3306b0f87568 (old id 8053221)
- date added to LUP
- 2016-04-04 13:03:51
- date last changed
- 2022-01-29 23:41:20
@inproceedings{541667cf-2587-4007-af71-3306b0f87568, abstract = {{In dense deployments, the performance of IEEE 802.11 Wireless Local Area Networks (WLANs) depends on the development of efficient contention resolution mechanisms since the collision probability can be high even with low number of users with the current 802.11 MAC mechanism. Also, the current 802.11 MAC is not opportunistic in the sense that it does not consider channel quality and traffic load of users, which can greatly degrade the network capacity. In this paper, we propose a new backoff scheme which performs well for dense networks resulting in low collision probability. Also, our backoff scheme opportunistically gives higher priority to users with high traffic load and better channel conditions, and thus reduces unnecessary contention. We analytically show that the performance of our backoff algorithm can be pushed to the maximum throughput in exchange for longer backoff delay, which is compensated with reduced number of collisions. We evaluate our algorithm in OMNeT++, and show that compared to the legacy 802.11 Distributed coordination Function (DCF) the aggregated network throughput can be increased up to 70\% by using our algorithm. Also, compared with legacy DCF, the maximum number of supportable users is much higher and the end-to-end delay performance is better with our backoff scheme for dense scenarios under the same traffic conditions.}}, author = {{Karaca, Mehmet and Zhang, Zhi and Landfeldt, Björn}}, booktitle = {{Proc. of the IEEE GLOBECOM'15 WS Enabling Technologies in Future Wireless Local Area Network (ETFWLALN)}}, isbn = {{9781467395267}}, keywords = {{IEEE 802.11; dense networks; opportunistic 802.11 DCF}}, language = {{eng}}, title = {{An Opportunistic Backoff Scheme for Dense IEEE 802.11 WLANs}}, url = {{http://dx.doi.org/10.1109/GLOCOMW.2015.7413974}}, doi = {{10.1109/GLOCOMW.2015.7413974}}, year = {{2016}}, }