G-DCF: Improving System Spectral Efficiency through Concurrent Transmissions in Wireless LANs
This paper presents G-DCF, a MAC protocol for wireless LANs that can improve system spectral efficiency of wireless LANs by allowing more concurrent transmissions. The 802.11 DCF creates exposed terminals which are nodes that can transmit successfully but are blocked by carrier sensing. More potenti...
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Series: | Wireless Communications and Mobile Computing |
Online Access: | http://dx.doi.org/10.1155/2019/5427573 |
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doaj-1f6240a129894d6b8ba2771a3ffc680c2020-11-25T00:04:43ZengHindawi-WileyWireless Communications and Mobile Computing1530-86691530-86772019-01-01201910.1155/2019/54275735427573G-DCF: Improving System Spectral Efficiency through Concurrent Transmissions in Wireless LANsAyinebyona Eliab0Yonghwi Kim1Joosang Lee2Jeong-Gun Lee3Jungmin So4Smart Computing Laboratory, School of Software, Hallym University, Chuncheon, Republic of KoreaSmart Computing Laboratory, School of Software, Hallym University, Chuncheon, Republic of KoreaDepartment of Computer Science and Engineering, Sogang University, Seoul, Republic of KoreaSmart Computing Laboratory, School of Software, Hallym University, Chuncheon, Republic of KoreaDepartment of Computer Science and Engineering, Sogang University, Seoul, Republic of KoreaThis paper presents G-DCF, a MAC protocol for wireless LANs that can improve system spectral efficiency of wireless LANs by allowing more concurrent transmissions. The 802.11 DCF creates exposed terminals which are nodes that can transmit successfully but are blocked by carrier sensing. More potential exposed terminals are created when APs are densely placed, limiting spatial reuse of channels and thus system throughput. In order to allow concurrent transmissions from exposed terminals, G-DCF establishes groups in the network. Members of a group are nodes located within the carrier sense range of each other but can transmit packets concurrently. Whenever one member of a group wins the channel and transmits its packet, other nodes in the group also start transmission, triggered by the group ID included in the preamble. Contention window is adjusted according to the group size for fair share of the channel. Performance evaluations show that G-DCF can significantly improve system throughput and fairness over 802.11 DCF, especially when the APs are densely deployed.http://dx.doi.org/10.1155/2019/5427573 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Ayinebyona Eliab Yonghwi Kim Joosang Lee Jeong-Gun Lee Jungmin So |
spellingShingle |
Ayinebyona Eliab Yonghwi Kim Joosang Lee Jeong-Gun Lee Jungmin So G-DCF: Improving System Spectral Efficiency through Concurrent Transmissions in Wireless LANs Wireless Communications and Mobile Computing |
author_facet |
Ayinebyona Eliab Yonghwi Kim Joosang Lee Jeong-Gun Lee Jungmin So |
author_sort |
Ayinebyona Eliab |
title |
G-DCF: Improving System Spectral Efficiency through Concurrent Transmissions in Wireless LANs |
title_short |
G-DCF: Improving System Spectral Efficiency through Concurrent Transmissions in Wireless LANs |
title_full |
G-DCF: Improving System Spectral Efficiency through Concurrent Transmissions in Wireless LANs |
title_fullStr |
G-DCF: Improving System Spectral Efficiency through Concurrent Transmissions in Wireless LANs |
title_full_unstemmed |
G-DCF: Improving System Spectral Efficiency through Concurrent Transmissions in Wireless LANs |
title_sort |
g-dcf: improving system spectral efficiency through concurrent transmissions in wireless lans |
publisher |
Hindawi-Wiley |
series |
Wireless Communications and Mobile Computing |
issn |
1530-8669 1530-8677 |
publishDate |
2019-01-01 |
description |
This paper presents G-DCF, a MAC protocol for wireless LANs that can improve system spectral efficiency of wireless LANs by allowing more concurrent transmissions. The 802.11 DCF creates exposed terminals which are nodes that can transmit successfully but are blocked by carrier sensing. More potential exposed terminals are created when APs are densely placed, limiting spatial reuse of channels and thus system throughput. In order to allow concurrent transmissions from exposed terminals, G-DCF establishes groups in the network. Members of a group are nodes located within the carrier sense range of each other but can transmit packets concurrently. Whenever one member of a group wins the channel and transmits its packet, other nodes in the group also start transmission, triggered by the group ID included in the preamble. Contention window is adjusted according to the group size for fair share of the channel. Performance evaluations show that G-DCF can significantly improve system throughput and fairness over 802.11 DCF, especially when the APs are densely deployed. |
url |
http://dx.doi.org/10.1155/2019/5427573 |
work_keys_str_mv |
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