An Efficient Channel Scanning Scheme With Dual-Interfaces for Seamless Handoff in IEEE 802.11 WLANs

Jeong, Jae-Pil; Park, Young Deok; Suh, Young-Joo

doi:10.1109/lcomm.2017.2763941

Cited by 6 publications

(21 citation statements)

References 10 publications

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“…Also, the analysis has been carried out without nodes with BE traffic to transmit and taking into account 20 nodes trying to transmit BE traffic per control cycle. The performance of the proposed soft-handover algorithm has also been compared with other algorithms proposed in the literature [28], [33]. Finally, to validate the performance of the proposed architecture, a comparison between the simulation results and the theoretical delay bounds obtained in Section IV is presented.…”

Section: A Simulation Setupmentioning

confidence: 99%

“…By means of this mechanism, it is only necessary to scan the relevant channels. Another solution is to propose a multi-beacon scheme to eliminate the scanning phase as done in [32], [33]. In the communication scheme proposed in [32], a beacon period is defined in which each AP transmits beacon packets using the channels of its neighboring APs.…”

Section: ) Ieee 80211 Standard-based Handover Algorithmsmentioning

confidence: 99%

“…In this way, the mobile nodes will receive during this period the beacons sent by all available APs in their coverage area and decide to execute a handover or not. In contrast, in [33], these beacons are not sent during a dedicated period and a second IEEE 802.11 interface is used for that purpose. It is necessary to emphasize that none of the mentioned proposals prevents the interruption of the communication during the handover process.…”

Section: ) Ieee 80211 Standard-based Handover Algorithmsmentioning

confidence: 99%

“…The performance of the proposed soft-handover algorithm described in Section III.C has been compared, in terms of average delay and packet losses during the handover process, with two other handover algorithms proposed in the literature [28], [33]. These two algorithms have been chosen because, although they do not completely avoid the interruption of the communication, they manage to reduce or eliminate the scanning phase, which is the most time-consuming phase of the entire standard handover process (≈ 90% of handover delay [51]).…”

Section: ) Average Delay and Packets Losses During The Handovermentioning

confidence: 99%

“…Moreover, the analyzed handover algorithms have been combined with the hybrid MAC scheme described in Section III.B. For the evaluation of the handover execution delay in the studies proposed in [28], [33], only association and rescheduling phases have been considered. The triggering and scanning phases can be omitted because the algorithms force the node to change AP before the condition of the link deteriorates, and the decision to carry out the handover has not yet been made.…”

Section: ) Average Delay and Packets Losses During The Handovermentioning

confidence: 99%

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Analysis and Evaluation of a Wired/Wireless Hybrid Architecture for Distributed Control Systems With Mobility Requirements

Fernandez¹,

Seijo²,

Mendicute

et al. 2019

IEEE Access

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Wireless communications offer significant benefits over wired communications, which has increased their popularity in industrial applications. Nevertheless, the existing wireless standard technologies do not satisfy the requirements demanded by the most critical industrial applications and thus, wired communications cannot be directly replaced by wireless solutions. Moreover, the inclusion of movable nodes in the network brings new challenges, such as the handover mechanism. In this paper, a hybrid wired/wireless architecture designed for industrial control applications is proposed. To control the wired network, a timesensitive network (TSN) is used and to control the wireless network a medium access control (MAC) protocol is designed. In order to communicate both networks, a bridge that acts as a deterministic access point (AP) with real-time features is also proposed. One of the fundamental parts of the proposed architecture is that it can be used in applications with mobility requirements. Hence, a soft-handover algorithm is designed which guarantees uninterrupted communication during its execution without the need for a second radio interface and with reduced growth in network overhead. The proposed architecture is evaluated in order to assess its performance. This paper extends our previous work, including both a theoretical analysis to determine the delay bounds of the proposed architecture and a comparison between the performances of the proposed handover algorithm with other algorithms proposed in the literature. The evaluation has been carried out through OMNeT++ simulations. The results demonstrate the superiority of the proposed handover algorithm compared with other state-of-the-art solutions. INDEX TERMSHandover, IEEE 802.11, industrial communications, industrial wireless sensor and actuator networks, real-time communications, SHARP, TSN, wireless communications. ZALOA FERNÁNDEZ received the B.Sc. degree in telecommunications systems engineering and the M.Sc. degree in embedded systems from the University of Mondragon, Spain, in 2014 and 2016, respectively. She is currently pursuing the Ph.D. degree with the Communications Systems Group, IKERLAN Technological Research Centre, Mondragón, Spain, in collaboration with the Signal Theory and Communications Group, University of Mondragon, Spain. Her research interest includes reliable wireless time-critical communications for industrial automation applications. ÓSCAR SEIJO received the B.Sc. and M.Sc. degrees in telecommunications engineering from the University of Oviedo, Spain, in 2015 and 2017, respectively. He is currently pursuing the Ph.D. degree with the Communications Systems Group of IKERLAN Technological Research Centre, Mondragón, Spain, in collaboration with the Signal Theory and Communications (TSC) Group, University of Oviedo, Spain. His research interests include wireless high-performance PHY and MAC design for industrial applications, time synchronization over wireless systems, and digital signal processing. MIKEL MENDICUTE received the B.S...

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Section: A Simulation Setupmentioning

confidence: 99%