An Enhanced Hand-Off Policy to Reduce Blocking Probability in Two-LayerWireless Systems

  • Tae-Jin Lee
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 2668)


In this paper, we consider a two-layer hierarchy, i.e. micro and umbrella layer, cellular system, and propose a new hand-off mechanism to minimize call blocking probability of high-speed hand-off calls with reasonable performance of new and low-speed hand-off calls. We used double control for highspeed hand-off calls in micro and umbrella layer. By formulating Markov chains and using queueing analysis, we have derived call blocking probabilities for ours and those of other hand-off schemes. We have shown that our proposed policy can indeed improve blocking probabilities of high-speed hand-off calls, which leads to improved system performance. Our policy can serve as a guideline to design hand-off policies within wireless systems or inter-working policies between systems.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2003

Authors and Affiliations

  • Tae-Jin Lee
    • 1
  1. 1.School of Information and Communication EngineeringSungkyunkwan UniversitySuwonKOREA

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