Prioritized Handover Requests in Cellular Mobile System with Subrating for Integrated Voice/Data Traffic

Abstract

Priority to hand off attempts in cellular radio network dealing with integrated traffic has proven to be one of the important issue to improve the grade of service (GOS) of such system. We propose prioritized fixed channel assignment strategy with subrating to protect the interest of handoffs in cellular radio network. To reduce the drop calls, finite buffering for handoffs of voice calls are allowed. The integrated voice/data traffic is originated from infinite population. Analytical results for the blocking probability of new and handoff attempts for each traffic group are derived by using steady state queue size distribution of the number of attempts in the system. We also derive expressions for blocking probabilities, delay probabilities and carried load etc. Since data/voice traffic users are usually, finite in numbers, finite population model has also been discussed. An iterative algorithmic procedure has been presented and validated by assigning the parameters of the system in order to compute performance measures. The optimal allocation of channels among new and handoff calls has been ascertained by formulating discrete capacity allocation problem. Numerical experiment has been performed to obtain optimum number of guard channels.

Indexing terms:

• Integrated traffic
• Cellular communication
• Wireless
• Queue
• Subrating
• Buffer

Additional information

Notes on contributors

M Jain

Madhu Jain born in 1959, received her MSc, MPhil, PhD and DSc degree in Mathematics from University of Agra. She has been a Gold medalist at MPhil level. There are more than 125 research publications in refereed International/ National journals and more than a dozen books to her credit. She was awarded the Young Scientific award, SERC visiting fellowship of Department of Science & Technology (DST), Government of India, Career award of University Grants Commission (UGC), India. She has successfully completed six sponsored major research projects of DST, UGC and Council of Scientific & Industrial Research (CSIR). Her current research interest includes Wireless Communications, Performance Modelling, Sott Computing, Bio-informatics and Operations Research. She has visited more than 25 reputed Universities / Institutes in USA, Canada, UK, Germany, France. Holland and Belgium. She has participated and presented her research works in more than 25 International and 50 National Conferences / Seminars. Twelve candidates have received their PhD degree under her supervision. After having taught in DAV College, Dehradun and IIT, Delhi as visiting faculty, she is teaching and conducting research in Institute of Basic Science, Dr B R Ambedkar University, Khandari, Agra.