Strategies for fast scanning and handovers in WiMAX/802.16

Boone, Paul; Barbeau, Michel; Kranakis, Evangelos

doi:10.1109/accessnets.2007.4447132

Cited by 20 publications

(13 citation statements)

References 5 publications

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“…Scanning in IEEE 802/16e [8] is a continuous activity that is conducted by a MS in order to scan the frequencies from NBSs. The goal of this scanning is to acquire a downlink signal from a BS.…”

Section: Existing Strategies 41 Scanning Of Base Stationsmentioning

confidence: 99%

Dual Triggering for Improvement of Handover in Mobile WiMax

Sawant¹,

Vernekar²

2013

IJCA

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Mobile WiMax (Worldwide Interoperability Microwave Access) is a wireless system based on IEEE 802.16e standard which provides the support for handovers between the cells. However in this handovers between the cells handover delay is introduced due to excessive scanning of frequencies by the Mobile Station (MS) in order to select a Target Base Station (TBS) as well as during the actual handover from the serving Base Station (SBS) to the TBS. In this paper two mechanisms are proposed, one to decrease the excessive scanning involved for selection of TBS using GPS system and other for the actual handover decision using distance as an added parameter for effective handover which changes dynamically depending on the velocity of the vehicle. This mechanism provides an effective improvement over the handover delay involved. Dual triggering is initiated to resolve the handover deficiency and provide an effective handover with reduction in handover delay. General TermsMobile WiMax, GPS

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Section: Existing Strategies 41 Scanning Of Base Stationsmentioning

confidence: 99%

Dual Triggering for Improvement of Handover in Mobile WiMax

Sawant¹,

Vernekar²

2013

IJCA

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“…When several neighboring BSs are chosen as target BSs for scanning or association, since only one BS can be selected as the target BS for performing the handover, this leads to redundant scanning processes. Boone et al [11] introduced a strategy to enhance scanning process latency by reducing the number of frequencies checked during each scanning operation. This strategy incorporates the history of successful scanning frequencies to guide the MS in choosing frequencies for future scanning operations.…”

Section: Handover Enhancement Techniques Focusing On the Handover Promentioning

confidence: 99%

The cross layer RMPA handover: a reliable mobility pattern aware handover strategy for broadband wireless communication in a high-speed railway domain

Aguado

Jacob

Astorga

et al. 2012

J Wireless Com Network

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The cross layer RMPA handover: a reliable mobility pattern aware handover strategy for broadband wireless communication in a high-speed railway domain AbstractEnhancing the handover process in broadband wireless communication deployment has traditionally motivated many research initiatives. In a high-speed railway domain, the challenge is even greater. Owing to the long distances covered, the mobile node gets involved in a compulsory sequence of handover processes. Consequently, poor performance during the execution of these handover processes significantly degrades the global end-to-end performance. This article proposes a new handover strategy for the railway domain: the RMPA handover, a Reliable Mobility Pattern Aware IEEE 802.16 handover strategy "customized" for a high-speed mobility scenario. The stringent high mobility feature is balanced with three other positive features in a high-speed context: mobility pattern awareness, different sources for location discovery techniques, and a previously known traffic data profile. To the best of the authors' knowledge, there is no IEEE 802.16 handover scheme that simultaneously covers the optimization of the handover process itself and the efficient timing of the handover process. Our strategy covers both areas of research while providing a cost-effective and standards-based solution. To schedule the handover process efficiently, the RMPA strategy makes use of a context aware handover policy; that is, a handover policy based on the mobile node mobility pattern, the time required to perform the handover, the neighboring network conditions, the data traffic profile, the received power signal, and current location and speed information of the train. Our proposal merges all these variables in a cross layer interaction in the handover policy engine. It also enhances the handover process itself by establishing the values for the set of handover configuration parameters and mechanisms of the handover process. RMPA is a cost-effective strategy because compatibility with standards-based equipment is guaranteed. The major contributions of the RMPA handover are in areas that have been left open to the handover designer's discretion. Our simulation analysis validates the RMPA handover decision rules and design choices. Our results supporting a high-demand video application in the uplink stream show a significant improvement in the end-to-end quality of service parameters, including end-to-end delay (22%) and jitter (80%), when compared with a policy based on signal-to-noise-ratio information.

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“…Several existing schemes for reducing handover latency in WiMAX are categorized to three categories: improving scanning latency [3][4] [10], inter-cell handover limitation [9] and cross layer design [5]. A prediction-based pre-coordination mechanism (PCM) has been presented to support fast handover in WiMAX network by improving the scanning latency.…”

Section: Related Workmentioning

confidence: 99%

A Cross Layer Fast Handover Scheme in VANET

Chiu

Hwang

Chen

2009

2009 IEEE International Conference on Communications

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Abstract-This study presents a cross-layer fast handover scheme for VANET, called vehicular fast handover scheme (VFHS), where the physical layer information is shared with the MAC layer, to reduce the handover delay. The key idea of VFHS is to utilize oncoming side vehicles (OSVs) to collect physical and MAC layers information of passing through RVs and broadcast the information to vehicles that are temporarily disconnected, referred to as broken vehicles (BVs). A BV can thus perform a rapid handover when it enters the transmission range of the approaching RVs. The effectiveness of VFHS is verified using ns2 simulations. Simulation results indicate that VFHS significantly decreases handover latency and packet loss.

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Strategies for fast scanning and handovers in WiMAX/802.16

Cited by 20 publications

References 5 publications

Dual Triggering for Improvement of Handover in Mobile WiMax

Dual Triggering for Improvement of Handover in Mobile WiMax

The cross layer RMPA handover: a reliable mobility pattern aware handover strategy for broadband wireless communication in a high-speed railway domain

A Cross Layer Fast Handover Scheme in VANET

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