• The Journal of the Korea Contents Association
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• v.6 no.9
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• pp.1-8
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• 2006

In a CDMA system, minimizing handoff calls is an important factor for user satisfaction. In this paper, we divide the cell area into two regions: normal region and soft handoff region. And we show that differentiating the guard channel numbers in those two regions make handoff calls minimized. We develop an SRN based cell model consists of normal and soft handoff region and analyze the performance of the model.

• The KIPS Transactions:PartC
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• v.8C no.1
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• pp.97-104
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• 2001

In this paper, we present a new hierarchical model for performance analysis of channel allocation and packet service protocol in wireless n network. The proposed hierarchical model consists of two parts : upper and lower layer models. The upper layer model is the structure state model representing the state of the channel allocation and call service. The lower layer model, which captures the performance of the system within a given structure state, is the wireless packet retransmission protocol model. These models are developed using SRN which is an modeling tool. SRN, an extension of stochastic Petri net, provides compact modeling facilities for system analysis. To get the performance index, appropriate reward rates are assigned to its SRN. Fixed point iteration is used to determine the model parameters that are not available directly as input. That is, the call service time of the upper model can be obtained by packet delay in the lower model, and the packet generation rates of the lower model come from call generation rates of the upper model.