Proceedings of the IEEK Conference (대한전자공학회:학술대회논문집)

The Institute of Electronics and Information Engineers (대한전자공학회)
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System Capacity Analysis with the Retransmission Limit on ARQ in a Voice/Data DS-CDMA System

  • Lee, Chiho (Department of Information and Communication, K-JIST) ;
  • Gwangzeen Ko (Department of Information and Communication, K-JIST) ;
  • Kim, Kiseon (Department of Information and Communication, K-JIST)
  • Published : 2000.07.01
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Abstract

In this paper, we investigate the effect of the retransmission limit both the system capacity and the average number of retransmissions in a voice/data DS-CDMA system. Basically, we consider the IS-95 type reverse link of the CDMA system, which supports two kinds of services: a general voice and a packetized data service. ARQ is used for the reliable data transmission. Convolutional code is used for FEC and CRC-CCITT code is used for the error detection in ARQ. The result shows that the number of concurrent data users decreases as we reduce the number of the retransmissions. However, at the same time, we can also reduce the average number of retransmissions. Concluding1y, we can select the retransmission limit so as to reduce large amount of' retransmissions with small sacrifice in the system capacity.

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