A Novel QoS Scheduling Approaches for IEEE 802.16 BWA Systems

• Main Authors: Yuan-Yang Hong, 洪元揚
• Other Authors: Shou-Chih Lo
• Format: Others
• Language: en_US
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/r44me4

碩士 === 國立東華大學 === 資訊工程學系 === 96 === In recent years, the wireless networks grow up rapidly. Users can connect to network systems without traditional wired network systems and being limited through locations only within the scope of base station (BS). The main reasons what the wireless networks prevail are the inexpensive cost and fast establishment, etc. The wireless local area network (WLAN) is the currently popular wireless transmission system. We can transmit or receive the data on the go wherever we are by using this system. But this system also has some limitations like short transmission distance and low data transmission rate, etc. So there is another new wireless network system named wireless metropolitan area network (WMAN). Much longer transmission distance, much higher data rate and more users are the advantages what WMAN is better than WLAN. The main difference between WMAN and WLAN is that WMAN guarantees quality-of-service and distributes data into different priorities. It can utilize bandwidth more flexible by way of the priority of data. In this thesis, the medium access control (MAC) layer is the research emphasis we stress on. We propose a novel scheduling approach based on the importance of data to be satisfied with the QoS guarantee. The proposed approach could make the system transmit more data and let bandwidth allocated more efficient. Real-time data would be served quickly and more by using this approach. But in the condition for serving real-time data quickly and more, it also assures non-real-time data always could get fixed bandwidth (BW) and not suffering from starvation. The conclusion is that the proposed approach would promote the whole throughput and maintain the fairness between all traffic classes in the system.