Performance Analysis on the Controllable Slotted DS-CDMA with an Allocating Buffer for Collided Traffic


IEICE TRANSACTIONS on Communications   Vol.E88-B   No.6   pp.2578-2587
Publication Date: 2005/06/01
Online ISSN: 
DOI: 10.1093/ietcom/e88-b.6.2578
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Satellite Communication
Slotted DS-CDMA,  collision-resolved queue,  system throughput,  message delay,  

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This paper presents an analysis of the Slotted DS-CDMA system with modified node components in order to construct a load control structure in which the service rates of each node can be dynamically adapted without using feedback information. In contrast to the traditional Slotted DS-CDMA which is widely represented with single queue, prior emphasis of the approach is laid on the usage of an additional queue which is applied to manage the collided packet traffic while its queue size is also used as a load control parameter. Semi-Markov process is applied to describe the statistic behavior of the system in steady state. Trade-offs between two major performance parameters, i.e., delay and throughput, are presented and compared with those of the traditional system. Results obtained from the simulation and numerical analysis using queuing concept are compared. With these results, an advantage performance for group packets is shown, and we finally extend the concept based on the obtained results to describe a simple algorithm using one way control message as the tool to alleviate the stability problem.