Building an SDN Enterprise WLAN Based on Virtual APs

Abstract

In this letter the development and testing of an open enterprise Wi-Fi solution based on virtual APs, managed by a central WLAN controller is presented. It allows seamless handovers between APs in different channels, maintaining the QoS of real-time services. The potential scalability issues associated to the beacon generation and channel assignment have been addressed. A battery of tests has been run in a real environment, and the results are reported in terms of packet loss and delay.

ARNAB: Transparent Service Continuity Across Orchestrated Edge Networks

“…The impact on the throughput is very short which is an expected result due to channel switching. Channel switching delay of the same APs used in our experiment is reported in [16] to be approximately between 90ms to 110ms at different interbeacon time.…”

“…Although the schemes in [14], [15] offer flexibility and scalability in management, they still assume that all the APs operate in the same channel. More recently, a solution that combines both the advantage of operating in multichannel environment and global view based on SDN is presented in [16], [17]. In ARNAB, we follow the same approach presented in [16] to enable continuous delivery of services at network access.…”

“…More recently, a solution that combines both the advantage of operating in multichannel environment and global view based on SDN is presented in [16], [17]. In ARNAB, we follow the same approach presented in [16] to enable continuous delivery of services at network access.…”

Terminal handover in software-defined WLANs

“…To solve the above problems, many researchers have devoted themselves to researching SDN-based WLAN architecture and terminal handover methods [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29]. Odin [15] enabled the seamless handover of terminals by performing virtual access point (VAP) migration.…”

Mejora de la Calidad en Redes WLAN Coordinadas a través de SDWN

“…Todo este procedimiento se ha puesto en marcha junto con la aplicación de red correspondiente para evaluar un seamless handover, tal como se puede observar en la Figura 2 y consultar en [8]. Los aspectos fundamentales para su correcto funcionamiento en la arquitectura desarrollada son: -Definir un mapa de canales utilizados por los diferentes AP, de tal forma que cada AP sepa cuáles son los canales utilizados por los AP cercanos y poder así monitorizar las STA cercanas y con posibilidad de ser asociadas a nuestro AP.…”