Proceedings ArticleDOI
BIGAP — Seamless handover in high performance enterprise IEEE 802.11 networks
Anatolij Zubow,Sven Zehl,Adam Wolisz +2 more
- pp 445-453
TLDR
In this paper, the authors present BIGAP, a novel architecture that assigns different channels to co-located APs in order to fully utilize the available radio spectrum and provides a mechanism for below MAC-layer handover through exploiting the Dynamic Frequency Selection capability in 802.11.Abstract:
Enterprise IEEE 802.11 networks need to provide high network performance to operate a large number of diverse clients like laptops, smartphones and tablets as well as capacity hungry and delay sensitive novel applications like mobile HD video & cloud storage efficiently. Moreover, such devices and applications require much better mobility support and higher QoS/QoE. Existing solutions can either provide high network performance or seamless mobility but not both. We present BIGAP, a novel architecture achieving both of the above goals. The former is achieved by assigning different channels to co-located APs in order to fully utilize the available radio spectrum. The latter is achieved by providing a mechanism for below MAC-layer handover through exploiting the Dynamic Frequency Selection capability in 802.11. In essence BIGAP forces clients to change AP whilst they ‘believe’ they are simply changing channel. BIGAP is fully compatible with 802.11 and requires no modifications to the wireless clients. Testbed results demonstrate a significant improvement in terms of network outage duration (which is 32 x smaller as compared to state-of-the-art solutions) and negligible throughput degradation during handover operation. In this way frequent and seamless handover operations can take place thus supporting both seamless mobility and efficient load balancing.read more
Citations
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Journal ArticleDOI
Software-defined Radios: Architecture, state-of-the-art, and challenges
Rami Akeela,Behnam Dezfouli +1 more
TL;DR: In this article, a survey of the state-of-the-art software-defined radio (SDR) platforms in the context of wireless communication protocols is presented, with a focus on programmability, flexibility, portability, and energy efficiency.
Journal ArticleDOI
A Review of Software-Defined WLANs: Architectures and Central Control Mechanisms
TL;DR: In this article, the authors present an overview of SDWLAN architectures and provide a qualitative comparison in terms of features such as programmability and virtualization, and classify and investigate the two important classes of centralized network control mechanisms: 1) association control and 2) channel assignment.
Journal ArticleDOI
ABRAHAM: Machine Learning Backed Proactive Handover Algorithm Using SDN
TL;DR: ABRAHAM is introduced, a machine learning backed, proactive, handover algorithm that uses multiple metrics to predict the future state of the network and optimize the load to ensure the preservation of QoS.
Proceedings Article
WiPLUS: Towards LTE-U Interference Detection, Assessment and Mitigation in 802.11 Networks
TL;DR: Evaluation results reveal that WiPLUS is able to accurately estimate the effective available medium airtime for each link in a WiFi BSS under a wide range of LTE-U signal strengths with a root-mean-square error of less than 3% for the downlink and less 10%" for the uplink.
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