On the tradeoff between blocking and dropping probabilities in multi-cell CDMA networks

Gábor Fodor, Miklós Telek

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

This paper is a sequel of previous work, in which we proposed a model and computational technique to calculate the Erlang capacity of a single CDMA cell that supports elastic services. The present paper extends that base model by taking into account two important aspects of CDMA. First, we describe a simple and a refined multicell CDMA model that are able to capture the impact of the neighbor cells on important performance measures of the cell under study. These performance measures include the class-wise blocking probabilities and the mean time that elastic sessions spend in the system. Secondly, we model the impact of the outage by taking into account that in-progress sessions can be dropped with a probability that depends on the current load in the serving and neighbor cells. We then consider a system with elastic and rigid service classes and analyze the trade-off between the total (soft and hard) blocking probabilities on the one hand and the throughput and the session drop probabilities on the other.

Original languageEnglish
Pages (from-to)22-33
Number of pages12
JournalJournal of Communications
Volume2
Issue number1
DOIs
Publication statusPublished - Jan 1 2007

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Keywords

  • Code division multiple access (CDMA)
  • Markov chains
  • Queueing theory
  • Traffic capacity

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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