Combined Spatial Division Multiplexing and Spatial Reuse across Decentral Wireless LANs

2021 ◽  
Author(s):  
M. Knitter ◽  
W. Endemann ◽  
R. Kays
Keyword(s):  
Wireless Lans ◽  
Spatial Reuse ◽  
Spatial Division Multiplexing

scholarly journals G-DCF: Improving System Spectral Efficiency through Concurrent Transmissions in Wireless LANs

2019 ◽  
Vol 2019 ◽  
pp. 1-16
Author(s):  
Ayinebyona Eliab ◽  
Yonghwi Kim ◽  
Joosang Lee ◽  
Jeong-Gun Lee ◽  
Jungmin So
Keyword(s):  
Spectral Efficiency ◽  
Mac Protocol ◽  
Wireless Lans ◽  
Performance Evaluations ◽  
System Throughput ◽  
Spatial Reuse ◽  
Fair Share ◽  
802.11 Dcf ◽  
Carrier Sense ◽  
Carrier Sensing

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.

A distributed access control method for wireless LANs in shadowing environments

2001 ◽  
Vol 84 (9) ◽  
pp. 16-26
Author(s):  
Tadao Saito ◽  
Hitoshi Aida ◽  
Terumasa Aoki ◽  
Soichiro Hidaka ◽  
Tredej Toranawigtrai ◽  
...  
Keyword(s):  
Access Control ◽  
Control Method ◽  
Wireless Lans ◽  
Distributed Access Control

Utility-Based Distributed Association Control Scheme with User Guidance for IEEE802.11 Wireless LANs

2015 ◽  
Vol E98.B (8) ◽  
pp. 1700-1714 ◽  
Author(s):  
Takahiro IWAMI ◽  
Irda ROSLAN ◽  
Yumi TAKAKI ◽  
Kyoko YAMORI ◽  
Chikara OHTA ◽  
...  
Keyword(s):  
Wireless Lans ◽  
Control Scheme ◽  
User Guidance ◽  
Distributed Association
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