長距離(Long-Reach)光纖接取技術藉由整合接取網路與都會網路，成為一個兼具成本考量以及提升網路效能之接取網路解決方案。在長距離光纖網路中，大部分的網路流量來自於各式各樣網路應用服務的”內部網域”(internetworking) 傳輸，例如: 視訊會議、多媒體串流和線上遊戲等。這些即時性的應用服務需要延遲上限與延遲變量的服務品質保證。本篇論文提出一個有效率的服務品質保證機制，讓兩種不同的內部網域流量，即: 即時性(real-time) 與非即時性(best-effort)，可以共享網路頻寬又能滿足個別的服務品質要求。本論文機制使用時槽式預約方法針對多變化的延遲限制流量提供連線建立與中斷連線程序以支援差異性服務所需的服務品質要求。最後，模擬結果展示了本論文機制確實可以在延遲上限與延遲變量方面，提供各式各樣應用服務所需的服務品質保證。

Long-Reach optical access technologies have emerged as a promising solution for combining access and metro backhaul networks in a cost effective manner. By their very nature, a large proportion of the traffic within such networks tends to be “internetworking” traffic, originating from applications such as teleconferencing, multimedia stream distribution, distributed on-line games, and so forth. These delay-sensitive applications require guaranteed Quality of Service (QoS) in terms of jitter and packet delay. This study presents an efficient QoS scheme which enables two types of internetworking traffic (i.e., real-time and best-effort) to share the available bandwidth efficiently while still satisfying their respective QoS requirements. The proposed QoS mechanism implements a slot-reservation approach which provides transmission setup and termination routines for diverse delay-constrained traffic to enable the support of differential services. The simulation results show that the proposed scheme achieves the QoS requirements in terms of jitter and packet delay.

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