Network Security

WLAN Management Framework

With the plethora of WLAN deployments in residential and enterprise settings, Internet accessibility has become easier than ever. This proliferation has become even more expedited because of increasing demands from a wide range of user devices, e.g., smartphones and tablet PCs. Unfortunately, despite the advancements of WLAN technologies, people are easily dissatisfied with their WLAN infrastructures because of an absence of intelligent and timely network treatments followed by the limited view of network traffic monitoring tools and vendor-oriented configurability.

Unlike Ethernet, WLAN requires a network management framework to monitor wireless network traffic at different target levels (i.e., short-term bursty users and long-term heavy down-loaders/up-loaders) because of its openness. In addition, the management framework needs to improve overall wireless bandwidth utilization by timely resource allocation actions (i.e., immediate action according to short-term monitoring results and eventual action according to long-term monitoring) as well as accommodate more users by dynamically providing capacity.


In broadband access networks, bandwidth allocation from competing flows can be an important problem, as it degrades the overall network performance. One reliable solution is bandwidth allocation based on the application type. On the other hand, because of their generic support for different measurement tasks, NetFlow and sFlow have been widely adopted to monitor wired and wireless in-networks. However, these sampling based monitoring tools cannot accurately report counts per flow. To better cope with this, a fair number of network monitoring tools based on OpenFlow have been proposed recently. RFlow+ falls into thoes two fields: SDN-based WLAN management and monitoring.

RFlow+ can hand immediate action for short-term (e.g., 50 ms) monitoring results and eventual action for long-term (e.g., 1 month) results. You can learn more from our journal papers shown as below.

Related Papers

  • Rhongho Jang, DongGyu Cho, Youngtae Noh, and DaeHun Nyang, “RFlow+: An SDN-based WLAN Monitoring And Management Framework,” Proceedings of IEEE INFOCOM 2017, Best-in-session Presentation Award, Atlanta, pp. 460-468, May 2017.
  • Rhongho Jang, Jeonil Kang, Abedelaziz Mohaisen, and DaeHun Nyang, “Rogue Access Point Detector Using Characteristics of Channel Overlapping in 802.11n,” Proceedings of ICDCS 2017, Demo track, Jun 2017.