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Optimization of Recycling Bandwidth in WiMax Technology


Affiliations
1 Department of CSE, Karpagam Institute of Technology, Coimbatore, India
2 Department of Information Technology, Karpagam Institute of Technology, Coimbatore, India
3 Department of Computer Science and Engineering, Anna University Technology, Coimbatore, India
     

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World Interoperability for Microwave Access (WiMax) is one of the leading technologies in the context of Broadband Wireless Access (BWA). The Bandwidth reservation allows IEEE 802.16 networks to provide QoS guaranteed services. The SS (Subscriber Stations) reserves the required bandwidth before any data transmissions. Due to the nature of VBR applications, it is very difficult for the SS to make the optimal bandwidth reservation. It is possible that the amount of reserved bandwidth is more than the demand. Therefore, the reserved bandwidth cannot be fully utilized. Although the reserved bandwidth can be adjusted via BRs, however, the updated reserved bandwidth is applied as early as to the next coming frame. The new scheme is ‘Bandwidth recycling’. In this scheme, the SS releases its unused bandwidth in the current frame and another SS pre-assigned by the BS has opportunities to utilize this unused bandwidth. This improves the bandwidth utilization. Moreover, since the existing bandwidth reservation is not changed, the same QoS guaranteed services are provided without introducing any extra delay. The three additional algorithms have been proposed to improve the recycling effectiveness.

Keywords

QoS, VBR, BS, SS, BR, WiMax.
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  • Optimization of Recycling Bandwidth in WiMax Technology

Abstract Views: 191  |  PDF Views: 3

Authors

P. Mayil Vel Kumar
Department of CSE, Karpagam Institute of Technology, Coimbatore, India
S. Annapoorani Mala
Department of Information Technology, Karpagam Institute of Technology, Coimbatore, India
M. Kavitha
Department of Computer Science and Engineering, Anna University Technology, Coimbatore, India

Abstract


World Interoperability for Microwave Access (WiMax) is one of the leading technologies in the context of Broadband Wireless Access (BWA). The Bandwidth reservation allows IEEE 802.16 networks to provide QoS guaranteed services. The SS (Subscriber Stations) reserves the required bandwidth before any data transmissions. Due to the nature of VBR applications, it is very difficult for the SS to make the optimal bandwidth reservation. It is possible that the amount of reserved bandwidth is more than the demand. Therefore, the reserved bandwidth cannot be fully utilized. Although the reserved bandwidth can be adjusted via BRs, however, the updated reserved bandwidth is applied as early as to the next coming frame. The new scheme is ‘Bandwidth recycling’. In this scheme, the SS releases its unused bandwidth in the current frame and another SS pre-assigned by the BS has opportunities to utilize this unused bandwidth. This improves the bandwidth utilization. Moreover, since the existing bandwidth reservation is not changed, the same QoS guaranteed services are provided without introducing any extra delay. The three additional algorithms have been proposed to improve the recycling effectiveness.

Keywords


QoS, VBR, BS, SS, BR, WiMax.