建置於高速公路之mobile WiMAX與DSRC整合式網路訊務量性能分析

The Traffic Performance of an Integrated Mobile WiMAX and DSRC Networks on the Highway

陳紹恩(Shao-En Chen)

指導教授 ： 馬杰

元智大學/電機通訊學院/通訊工程學系/碩士(2007年)

https://doi.org/10.6838/YZU.2007.00112

摘要

本論文主要探討在高速公路上行動台的移動速度對整合式Mobile WiMAX/DSRC多媒體網路性能的影響。在模擬中包含：時槽共享(CS)法、模糊控制多重時槽保留(FCB_MTSR)法、用戶移動特性、整合式網路於交流道與高速公路上之應用。並推導出最小速度不為零的新通話與交遞通話細胞停留時間之機率密度函數與累積分佈函數，以便進行整合式網路建置於高速公路上之訊務量性能模擬。

　　模擬結果顯示：在FCB_MTSR法下，所有傳輸類型之通話會有相同的新通話阻礙機率和交遞失敗機率；行動台的移動速度越快，系統新通話阻礙機率與交遞失敗機率越低；在相較於移動速度是在50km/hr到100km/hr的車速，當行動台移動速度低於50km/hr時，會有較高的新通話阻礙機率與交遞失敗機率。本論文最後以分析結果驗證模擬結果的合理與正確性。

關鍵字

車路通訊系統 ； 行動式微波存取全球互通 ； 細胞停留時間 ； 模糊控制多重時槽保留法 ； 車輛定位系統

並列摘要

The effect of the mobile station (MS) speed on the traffic performance of an integrated mobile WiMAX and DSRC multimedia networks applied to the highway communication link of the vehicle position system (VPS) is presented. The fuzzy control-based multiple threshold slot reservation (FCB_MTSR) scheme is proposed to maintain the constant traffic performance for the multimedia services with different data rates. The probability density function (pdf) and cumulative distribution function (cdf) of cell residence time for both the mobile WiMAX and DSRC systems are derived to support the simulations in which the minimum MS speed may not be zero.

　　The simulation includes five cases, where cases 4 and 5 are the application examples used in the VPS for ITS services. The simulation results demonstrate that the integrated mobile WiMAX/DSRC multimedia networks using the proposed FCB_MTSR scheme for varying data rate multimedia data services will result in the same new call blocking probability and handoff failure probability. It is also observed that the new call blocking and handoff failure probabilities for case 4, where the MS speed is below 50 km/hr, is higher than those for case 5, where the lower and the upper limits of the MS speed are 50 km/hr and 100 km/hr, respectively, because the new call blocking and handoff probabilities decrease with an increasing mean MS speed. Finally, the performance analysis results are used to validate the simulation results.

並列關鍵字

DSRC ； mobile WiMAX ； cell residence time ； FCB_MTSR schem ； VPS

參考文獻

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