IEEE802.16e Simulation Issues

Bazzi, Alessandro; Leonardi, Giacomo; Pasolini, Gianni; Andrisano, O.

doi:10.1109/mws.2009.20

Cited by 4 publications

(2 citation statements)

References 6 publications

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“…We have added the WiMAX patch with mobility developed by the Advanced Network Technologies Division of the National Institute of Standards and Technologies [10], [11]. The simulation script is written in the Tool Command Language (Tcl) [12], [13].…”

Section: A Simulation Setupmentioning

confidence: 99%

A New Seamless Handover Mechanism for IEEE 802.16e in WiMAX Networks

Bhakthavathsalam¹,

Mohammed²

2014

IJCCE

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Abstract-In IEEE 802.16e standard, mobility and handover are added as basic capabilities. It defines a framework providing specific methods or algorithm for handover that can be deployed in mobile stations to enable them for switching seamlessly from one base station to another. A mobile subscriber station (MSS) basically conducts hard handover operation when it moves to another base station (BS). Therefore, the MSS is not able to send or receive the data during handover process and these data should be delayed. As a result, real time packet could be dropped by handover delay. In this paper, we evaluate the performance of these handover schemes based on the metrics for delay and throughput. Then we enhance their performance by incorporating the principle of circularity. Circularity is a paradigm that allows the identification of specific groups of packets or events. This new paradigm reduces the collisions among request packets and thereby improves the performance in WiMAX networks. The evaluation and enhancement are performed through extensive simulation studies.Index Terms-IEEE 802.16e, MAC sublayer, contention resolution, handover ranging, circularity, network simulator 2.

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Section: A Simulation Setupmentioning

confidence: 99%

A New Seamless Handover Mechanism for IEEE 802.16e in WiMAX Networks

Bhakthavathsalam¹,

Mohammed²

2014

IJCCE

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“…We describe the results of the simulations conducted using ns-2 [25], [26] in this section. In the first graph shown in Figure 7, we compare the delay incurred in the IR mechanism in the existing and enhanced scenarios.…”

Section: Simulation With Irmentioning

confidence: 99%

Evaluation And Enhancement Of Performance Metrics For Ir And Bwr In Mac 802.16

Bhakthavathsalam¹

2012

IJWMN

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In the IEEE 802.16 standard, Initial Ranging (IR) is defined as the mechanism of acquiring the correct timing offsets and power adjustments such that the Subscriber Station (SS) is co-located with the Base Station (BS). Bandwidth Request (BWR) is the process by which the communication is established between BS and SS requesting the uplink bandwidth allocation. In this, we evaluate the performance of these two schemes based on the metrics of delay and throughput. Then we enhance their performance by incorporating circularity. Circularity is a paradigm that allows the identification of specific groups of packets or events. Using this, we introduce delay control and backoff window control in the case of IR and selective dropping of BWR packets. This new paradigm reduces the collisions among request packetsand thereby, improves both these mechanisms. The evaluation and enhancement are performed through extensive simulated studies.

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On the accuracy of physical layer modelling within wireless network simulators

Bazzi

Pasolini

2012

Simulation Modelling Practice and Theory

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IEEE802.16e Simulation Issues

Cited by 4 publications

References 6 publications

A New Seamless Handover Mechanism for IEEE 802.16e in WiMAX Networks

A New Seamless Handover Mechanism for IEEE 802.16e in WiMAX Networks

Evaluation And Enhancement Of Performance Metrics For Ir And Bwr In Mac 802.16

On the accuracy of physical layer modelling within wireless network simulators

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