Proceeding of

1st Int. Conf. on Recent Trends & Research in Engineering and Science


21-23 March, 2015


Organized By

Padm. Dr. V. B. Kolte College of Engineering & Polytechnic, Malkapur



A Special Issue of

International Journal of Computer Science and Applications



Advisory Committee

Dr. G. R. Bamnote

(Dean, Faculty of Engg, SGBAU Amravati)


Dr. B. E. Narkhede

(Vice President IIIE, Mumbai)


Dr. Md. Mamun Habib

(University Utara Malaysia (UUM, Malaysia)


Dr. C. R. Patil

(Prof. PRMIT&R Badnera, Amravati)


Dr. T. R. Deshmukh

(Prof. PRMIT&R Badnera, Amravati)


Dr. W. Z. Gandhare

(Principal, Govt. College of Engineering Amravati)


Dr. D. N. Kyatanavar

(Principal, SRESCOE Kopargaon)


Dr. U. Pendharkar

(Professor, Government Engineering College, Ujjain)


Dr. Ajit Thete

(Director, Centre for Development of Leadership in    Education Pvt Ltd, Aurangabad)


Technical Committee

Dr. M. T. Datar

Dr. S. K. Garg

Dr. Shrikaant Kulkarni

Shri. D. N. Patil

Dr. A. W. Kolte

Prof. Ajitabh Pateriya

Prof. P. K. Patil

Prof. S.N. Khachane

Prof. Parag Chourey

Prof. B.K.Chaudhari

Prof. N.A. Kharche

Prof. R.M. Choudhari

Prof. R. B. Pandhare

Prof. A.P. Jadhao

Prof. S.B. Jadhav

Prof. Santosh Raikar

Prof. Y.P. Sushir

Prof. B. M. Tayde



Prof. K. H. Walse


Research Publications, India



IJCSA ISSN: 0974-1011 (Online) >>    

Analysis of Bandwidth Recycling in Wireless 802.16 Networks to Improve Bandwidth Utilization


Manjiri U. Karande and Bharat K. Chaudhari



IEEE 802.16 Working Group and was designed to support the bandwidth demanding applications with quality of services (QoS) in metropolitan areas. Bandwidth is reserved for each application to ensure the quality of services (QoS). It is difficult for subscriber station (SS) to predict the incoming data for variable bit rate application. To ensure the QoS guaranteed services, the SS may reserve more bandwidth than its demand due to which the reserved bandwidth may not be fully utilized all the time. Based on these assumptions, new scheme is proposed, named Recycling of Unused Bandwidth without changing the existing bandwidth reservation. It allows other SS in that network to utilize the unused bandwidth when it is available of any SS through BS allocation policy. The SS accurately identify the portion of unused bandwidth and it provides the information to BS then BS provides the method to recycle the unused bandwidth. Rejected Bandwidth Request First Algorithm (RBRFA) schedules SSs those require extra bandwidth as CSs (Complementary Stations) on CL (Complementary List), so the probability to recycle the unused bandwidth while the CS receives the RM (Request Message) is increases.  Hence the system throughput can be improved while maintaining the same QoS guaranteed services..

2015 International Journal of Computer Science and Applications 

Published by Research Publications, India