Performance Evaluation of a Packet Channel Sharing Protocol for Dynamic Channel Assignment Systems

Takeo ICHIKAWA  Hidetoshi KAYAMA  Masahiro MORIKURA  

IEICE TRANSACTIONS on Communications   Vol.E81-B       pp.616-624
Publication Date: 1998/03/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Category: Radio Communication
packet radio communications,  DCA,  PHS,  random access,  

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This paper introduces a new analytic method that uses modified state equations to evaluate the performance of PCSD (Packet Channel Sharing protocol for DCA systems) with the goal of increasing the spectrum efficiency of DCA systems by realizing channel sharing between circuit-switched calls and packets. The results of this analysis show that PCSD is more suitable for microcellular systems than cellular systems, and that PCSD system performance improves as the average holding time of circuit-switched calls increases. Moreover, this paper proposes a novel scheme to determine the optimum release delay time of packet channels in order to achieve high throughput for packets as well as high channel capacity for circuit-switched calls. The proposed scheme shows that the optimum release delay time for PHS (Personal Handy-phone System) is greater than 60 frames and less than 100 frames.