Slotted ALOHA and CDPA: a comparison of channel access performance in cellular systems

  • Authors:

  • Flaminio Borgonovo;Michele Zorzi

  • Affiliations:

  • Dipartimento di Elettronica e Informazione, Politecnico di Milano, Milano, Italy;Dipartimento di Elettronica e Informazione, Politecnico di Milano, Milano, Italy

  • Venue:
  • INFOCOM'96 Proceedings of the Fifteenth annual joint conference of the IEEE computer and communications societies conference on The conference on computer communications - Volume 2
  • Year:
  • 1996

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Abstract

The paper compares the performance of two channel-access schemes suitable for the cellular environment, which, in particular allow the packet capture and can deal with inter-cell interference. The first scheme is the well known S-ALOHA while the second, one is the Capture Division Packetized Access, recently proposed The comparison is analytically performed over a common system with a common analytical model. Despite the many analyses appeared on S-ALOHA, the one we develop is new because a throughput density uniformly distributed on the plane is considered in a multiple cell environment. The analysis clearly shows the effect of intra-cell and inter-cell interference on the ALOHA system and proves that a superior throughput is achieved by CDPA, which completely avoids intra-cell interference. Our analysis also provides insight about the effectiveness of power control on both systems.