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  • 學位論文

直接序列分碼多工/非同步阿囉哈系統對兩種使用者分類於M/M/inf 排隊模型之模擬

DS CDMA/Unslotted ALOHA System with Two User Classes Based on M/M/inf Queueing Model

指導教授 : 曾恕銘
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摘要


直接序列分碼多工/非同步阿囉哈系統(DS CDMA/unslotted ALOHA system)用於兩種使用者分類,在此使用沒有封包離開率近似的M/M/infinity排隊模型分析。此有別於先前方法中將M/D/infinity排隊模型的封包離開率做近似。分析與模擬結果顯示本篇提出的排隊模型時較之前的方法簡單,而在運算的效率上將比使用近似封包離開率的方法約快上250 倍。

並列摘要


The performance of the DS CDMA unslotted ALOHA system with two user classes is analyzed by the M/M/infinity queueing model without death rate approximation. The previous scheme use M/D/infinity queueing model with death rate approximation. The analytical and simulation results show that the new scheme is simpler than the previous scheme. The speed of analysis program is 250 times faster than previous scheme.

參考文獻


of a DS/SSMA unslotted ALOHA system with two user
classes,” IEEE Transactions on Vehicular
IEEE Journal of Selected Areas in Communications,
[3] E. Cinlar, “An introduction to spatial queues,”
Advances in Queueing, Edited by J. H. Dshalalow, CRC

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