A study of uplink resource allocation algorithm to improve the performance of the ertPS traffic in Moblie WiMAX Networks
| Autor: | Tientsung Tai, 戴天縱 |
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| Rok vydání: | 2011 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 99 Although in IEEE 802.16e standard has five different resource allocations of QoS, the standard has not propose a suggestion of specific assurance to maintain QoS; however, these problems has been emphasized by studies in recent years. In this paper, an ertPS algorithm is used in the mobile terminal system of wireless network model to PMP. The goal of our algorithm, improving uplink resource allocation, is to solve the problem that the data rate of serving VBR traffic to be periodic and variable under unpredicted wireless communication condition. Due to the VBR traffic’s features, the mobile terminal device may face problems of the asymmetry of requested and available resources. According to changes of statistical frequency of request header at each mobile system, this algorithm ensures that the base station assigns uplink resources actively to the mobile devices whose requirement of resources have increased-; it also improves the shortcomings of the algorithm originally used in formal ertPS, which helps this research to decrease the packet loss rate and to satisfy the demanded delay of traffic. The simulation shows this research can reduce the transmission data delay during uplink and decrease the packet drop rate to guarantee the demanded QoS. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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