Performance of fixed and dynamic channel allocation schemes in a motorway environment

Muhtar, Adnan; Qazi, Bilal R.; Elmirghani, Jaafar M. H.

doi:10.1109/wocn.2010.5587367

Cited by 2 publications

(1 citation statement)

References 7 publications

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“…• The arrival processes of new vehicle and handoff vehicle follow Poisson distributions with rates λ n and λ h , respectively [30]. • The cell residence time of each vehicle follows an exponential distribution with mean 1 μc .…”

Section: Performance Analysismentioning

confidence: 99%

Vehicular Passenger Mobility-Aware Bandwidth Allocation in Mobile Hotspots

Kim

Pack

et al. 2014

IEEE Trans. Wireless Commun.

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In this paper, we propose a vehicular passenger mobility-aware bandwidth allocation (V-MBA) scheme in mobile hotspots. The V-MBA scheme consists of both call admission control and bandwidth adjustment functions to lower handoff vehicle service dropping probability and efficiently utilize resource of base station. Specifically, a handoff priority scheme with guard bandwidth is employed to protect handoff vehicle service. Also, bandwidth is dynamically assigned to each vehicle by exploiting vehicular passenger movement pattern that includes getting on and off events at a station. We evaluate the V-MBA scheme by developing a continuous-time Markov chain model. Simulation results demonstrate that the V-MBA scheme can guarantee low new vehicle service blocking probability and handoff vehicle service dropping probability through flexible bandwidth allocation.Index Terms-Mobile hotspots, vehicular passenger mobilityaware bandwidth allocation, call admission control, bandwidth adjustment.

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Section: Performance Analysismentioning

confidence: 99%

Vehicular Passenger Mobility-Aware Bandwidth Allocation in Mobile Hotspots

Kim

Pack

et al. 2014

IEEE Trans. Wireless Commun.

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A reservation-based call admission control scheme and system modeling in 4G vehicular networks

Halabian

Rengaraju

Lung

et al. 2015

J Wireless Com Network

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In 4G cellular networks, call admission control (CAC) has a direct impact on quality of service (QoS) for individual connections and overall system efficiency. Reservation-based CAC schemes have been previously proposed for cellular networks where a certain amount of system bandwidth is reserved for high-priority calls, e.g., hand-off calls and real-time new calls. Traditional reservation-based schemes are not efficient for 4G vehicular networks, as the reserved bandwidth may not be utilized effectively in low hand-off rates. We propose a channel borrowing approach in which new best effort (BE) calls can borrow the reserved bandwidth for high-priority calls. Later, if a hand-off call arrives and all the channels are busy, it will pre-empt the service of a borrower BE call if there exists any. The pre-empted BE calls are kept in a queue and resume their service whenever a channel becomes available. The analytical model for this scheme is a mixed loss-queueing system for which it is difficult to calculate call blocking probability (CBP) and call dropping probability (CDP). Our focus in this paper is on the system modeling and performance evaluation of the proposed scheme. We present two system models that approximate the operation of the proposed scheme. For these models, we derive the CBP and CDP analytically. It is shown that our analytical results are very close to the ones obtained from simulations. Furthermore, it is observed that our channel borrowing approach decreases the CBP considerably while increases the CDP slightly over a large range of hand-off rates.

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Performance of fixed and dynamic channel allocation schemes in a motorway environment

Cited by 2 publications

References 7 publications

Vehicular Passenger Mobility-Aware Bandwidth Allocation in Mobile Hotspots

Vehicular Passenger Mobility-Aware Bandwidth Allocation in Mobile Hotspots

A reservation-based call admission control scheme and system modeling in 4G vehicular networks

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