Analytical performance evaluation of a WiMAX cell with VoIP/elastic data traffic

In this paper we consider call admission control in cellular environment for data sessions and voice calls of high priority. A cell is divided into two zones with different average signal to noise ratio, and each zone uses its own modulation and coding. A dynamic resource allocation scheme is further considered, which allows communication systems to utilize their resources more efficiently. All the idle channels, which are left after the voice calls, are allocated to elastic data sessions to increase their transmission rate. When a voice call arrives, required channels can be released to serve it if only elastic data calls have a minimum required bandwidth to continue their sessions. To evaluate the role of elastic traffic, analytical models with elastic and fixed data sessions are formulated and solved. For both cases we derive blocking probabilities as well as other performance metrics of interest. According to numerical results, elastic data sessions achieve higher channel utilization and their mean transmission time is ten times less than that of fixed data sessions. As a result, the mean number of elastic data sessions in the system is twice less than that of fixed data sessions. © 2011 IEEE.

Authors
Efimushkina T. 1 , Vassileva N.2 , Moltchanov D.3 , Koucheryavy Y.3
Language
English
Pages
509-514
Status
Published
Number
5766524
Year
2011
Organizations
  • 1 Telecommunications Systems, Peoples' Friendship University of Russia, Moscow, Russian Federation
  • 2 Telematics Engineering, UPC, Barcelona, Spain
  • 3 Department of Communications Engineering, Tampere University of Technology, Tampere, Finland
Keywords
adaptive modulation and coding; analytical model; call admission control; elastic traffic; performance evaluation; resource allocation
Date of creation
19.10.2018
Date of change
19.10.2018
Short link
https://repository.rudn.ru/en/records/article/record/2535/