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Performance of CDPD with Timed Hop and Forced Hop

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Abstract

Cellular Digital Packet Data (CDPD) offers mobile users access to a low-cost, ubiquitous, wireless data network. CDPD can be overlaid on existing AMPS analog cellular systems and share their infrastructure equipment on a non-interfering basis. To prevent interference with the voice activities, CDPD performs forced hop to a channel stream when a voice request is about to use the RF channel occupied by that channel stream. In addition, several timers and system parameters are defined in CDPD to ensure that the normal AMPS activities are not affected by CDPD. This article investigates how the channel selection algorithms, the timers and other parameters affect the performance of AMPS/CDPD systems. Specifically, we study the trade-off between mean CDPD channel holding time and voice incompletion probability. Our study indicates that if AMPS exercises the most-idle channel selection algorithm and CDPD exercises the least-idle channel selection algorithm, then the largest mean CDPD channel holding time is expected. On the other hand, if AMPS exercises the least-idle channel selection algorithm, then the smallest voice incompletion probability is expected.

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Authors and Affiliations

  1. Department of Computer Science and Information Engineering, National Chiao Tung University, Hsinchu, Taiwan, ROC

    Yu-Min Chuang, Yi-Bing Lin & Wen-Nung Tsai

Authors
  1. Yu-Min Chuang
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  2. Yi-Bing Lin
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  3. Wen-Nung Tsai
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Chuang, YM., Lin, YB. & Tsai, WN. Performance of CDPD with Timed Hop and Forced Hop. Wireless Networks 7, 33–42 (2001). https://doi.org/10.1023/A:1009091830860

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