在無縫隙漫遊在各種不同的網路協定中互連的重要性更是無庸置疑的。本論文特別著重在眾多無線通信網路架構中利基型的車用無線隨意網路與目前主流的無線多媒體網路協定之間互連差異化時服務品質的研究，甚至未來可以擴充到頻寬傳輸量更大的第四代行動通訊。儘管有許多跨層級的設計概念來提升系統的流通量，但鮮少有研究可同時考量服務品質以及公平性。本論文亦提出跨階層子載波排序機制，選擇較佳的子載波來傳送資料與頻寬請求以及封包排程的對應關係。其中電源的管理是另一最具挑戰的問題。為了節省電能，行動台被准許進入睡眠模式或活動模式。考慮於多播廣播服務的應用環境之下，提出節能排程機制，同時滿足即時連線的服務品質之要求。除此之外，在無線多媒體網路系統下，提出基於小型蜂巢式基地台的允入控制排序機制，利用使用者選擇較佳的通道狀況，對應其基地台所提供之調變，來提升系統的流通量與降低延遲時間，以確保對用戶的服務品質。最後本論文提出應用於行動式無線網路之適應性調變技術與視訊編碼群播之研究，利用中央控制伺服器處理多媒體伺服器和基地台之間的信令。

In this study, we present a novel approach to support an open architecture environment for telematics services based on international standards. The proposed core telematics platform can optimize the data transmission under linearly increased time complexity by employing a high-scalable architecture design when a large number of devices connect to the application servers. The proposed context awareness application server approach can optimize context-awareness features to provide personal tracking services to children and elders for safety purposes. In addition, Mobile WiMAX networks usually provide flexible sleep-mode operations that allow mobile stations (MSs) to conserve energy during sleep or active mode. This study proposes an energy-efficient packet scheduling algorithm for both multicast and broadcast services that does not violate the quality of service (QoS) requirements of real-time connections. Because the bandwidth usage of broadband wireless access networks is limited, a crucial goal in this field is to improve the system throughput and provisioning of QoS by supporting multiple users based on limited bandwidth resources. Resource reallocation is associated with unbalanced traffic loads, decreased resource use, and increased blocking and dropping probabilities. To address these issues, this study proposes a channel-aware resource reallocation for admission control scheme. Finally, Intermediate Control Server is proposed to deal with the signaling multimedia server for IPTV (Internet Protocol TeleVision).

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