Concurrent events scheduling for efficient simulation modelling of large scale cellular networks based on multitasking real time scheduling techniques and analysis

  • Authors:

  • P. M. Papazoglou;D. A. Karras;R. C. Papademetriou

  • Affiliations:

  • Department of Informatics & Computer Technology, Lamia Institute of Technology, Greece and Department of Electronic & Computer Engineering, University of Portsmouth, United Kingdom;Department of Automation Engineering, Chalkis Institute of Technology, Greece;Department of Electronic & Computer Engineering, University of Portsmouth, United Kingdom

  • Venue:
  • ICCOM'08 Proceedings of the 12th WSEAS international conference on Communications
  • Year:
  • 2008

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Abstract

Simulation environments constitute efficient tools for designing and evaluating wireless cellular networks. These environments consist of various critical components such as the simulation model, the modelled services and the simulation model architecture. The real network events such as new call admission and handoff are simulated by corresponding specialized mechanisms which generate and schedule events in later time respectively. The most critical component is the event scheduling mechanism which reflects network events as they happen in a real network. The state of the art event scheduling mechanism called Calendar Queue schedules events for later execution based on the corresponding time stamps of each generated event. The major drawback of this approach is that the generated events are executed only sequentially due to progressive time stamps. On the other hand, events in a real wireless network happen concurrently and so the state of the art mechanism can not reflect these conditions. Through this paper, an alternative novel real time scheduling mechanism is proposed and preliminarily analyzed which faces effectively the concurrent nature of the generated network events providing an efficient solution to the Calendar Queue problem. Finally, simulation results show that the proposed scheduling mechanism performs better as compared to the state of the art approach.