MiFi: A framework for fairness and QoS assurance in current IEEE 802.11 networks with multiple access points

2005 ◽  
Author(s):  
Y. Bejerano ◽  
R.S. Bhatia
Keyword(s):  
Ieee 802.11 ◽  
Multiple Access ◽  
Access Points ◽  
802.11 Networks ◽  
Ieee 802.11 Networks

scholarly journals A Cluster-Based Channel Assignment Technique in IEEE 802.11 Networks

Telecom ◽  
2020 ◽  
Vol 1 (3) ◽  
pp. 228-241
Author(s):  
Jose Manuel Gimenez-Guzman ◽  
David Crespo-Sen ◽  
Ivan Marsa-Maestre
Keyword(s):  
Ieee 802.11 ◽  
Frequency Band ◽  
Channel Assignment ◽  
Access Points ◽  
Critical Configuration ◽  
802.11 Networks ◽  
Ieee 802.11 Networks ◽  
Heuristic Technique

Channel assignment has become a critical configuration task in Wi-Fi networks due to the increasing number and density of devices which use the same frequency band in the radioelectric spectrum. There have been a number of research efforts that propose how to assign channels to the access points of Wi-Fi networks. However, most of them ignore the effect of clients (also called stations or STAs) in channel assignment, instead focusing only on access points (APs). In this paper, we claim that considering STAs in the channel assignment procedure yields better solutions in comparison with those obtained when STAs are ignored. To evaluate this hypothesis we have proposed a heuristic technique that includes the effect of interferences produced by STAs. Results show that taking STAs into account clearly improves the performance of the solutions both in terms of the achieved utility and in terms of the variability of results. We believe that these results will be useful to the design of future channel assignment techniques which consider the effect of STAs.

scholarly journals A Software-Defined Networking Framework to Provide Dynamic QoS Management in IEEE 802.11 Networks

Sensors ◽  
2018 ◽  
Vol 18 (7) ◽  
pp. 2247 ◽  
Author(s):  
Pilar Manzanares-Lopez ◽  
Josemaria Malgosa-Sanahuja ◽  
Juan Muñoz-Gea
Keyword(s):  
Wireless Networks ◽  
Ieee 802.11 ◽  
Window Size ◽  
Software Defined Networking ◽  
Channel Access ◽  
Access Points ◽  
Physical Layers ◽  
802.11 Networks ◽  
Ieee 802.11 Networks ◽  
Set Up

In this paper, the concept of SDN (Software Defined Networking) is extended to be applied to wireless networks. Traditionally, in a wired SDN environment, the OpenFlow protocol is the communication protocol used to configure the flow table of forwarding elements (i.e., switches and Access Points). However, although in IEEE 802.11 networks there is no concept of forwarding, the SDN paradigm could also be applied to set up the wireless network dynamically, in order to improve the performance. In this case, not only the network elements, that is the Access Points, but also the mobile elements should configure their link and physical layers parameters following the guidelines of a centralized SDN controller. In particular, we propose a mechanism called DEDCA (Dynamic Enhanced Distributed Channel Access) to manage the channel access in wireless networks, and a framework that enables its implementation in 802.11-based wireless networks using SDN technology. The key aspect of this alternative solution is the control over the contention window size of the wireless terminals. Thus, an adequate response to dynamic and short-term Quality of Service (QoS) requirements can be offered to services running on these networks. DEDCA mechanism relies upon the use of a scalar parameter called gain. The mathematical model which has allowed us to obtain this parameter is presented and evaluated in this paper. Finally, the usefulness of the proposed solutions have been evaluated by means of their implementation in an example case.

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