隨著越來越多不同種類的服務透過網路來提供，如何使這些有著不同需求的服務 順利運作就成為了一個熱門的主題。大部分的QoS架構都是針對特定種類的服務 所設計的，且 常面臨實作成本高昂或是硬體支援相關的問題。而替換新硬體的成 本也隨著行動、無線網路的出現進一步增加。
在此篇論文中我們會探討幾種已被提出的QoS架構，包含其實作之方與為了 達成目的所做的取捨，以及潛在的問題，並找出這些架構與TCP在WiFi環境下可 能面臨的劣勢，並介紹我 們的QoS架構，一種以QUIC通訊協定取代傳輸控制協 定(TCP)的QoS架構。QUIC是專門針對現今高速、高頻寬、行動/無線流量佔比增 加的網路狀態所設計，YouTube就是使用QUIC的最佳 實例，並且QUIC是個相當 年輕的通訊協定，於2021年五月才發布正式版RFC。我們的架構結合了bit rate控 制與資源分配，透過控制發送端的bit rate，將使我們在WiFi環境下可以 增加頻寬 的利用效率並使網路的吞吐量相較於TCP更加穩定、可控，並且我們的架構與 其他架構最大的差別在於我們並不像TCP一樣依靠丟棄封包來調降發送端的bit rate，這將有助於 改善頻寬的利用率。

With more and more different kinds of services on the internet, they all have different needs and criteria and how to provide these services efficiently has become a popular topic. Most QoS approaches are designed for specific services and suffer from complexity in implementation or hardware support. The cost to update hardware also becomes higher with the emergence of cellular and 802.11.

In this paper we discuss some current QoS approaches. The aspects we discuss include where these approaches are implemented in the network stack and the tradeof- f/problem they may have. Then, we discover the problem of these approaches working with TCP under the WiFi environment and introduce our approach based on QUIC pro- tocol. QUIC was just released as a formal RFC in May 2021. The QoS approach we pro- posed is a combination of bit-based and resource reservation. By controlling the source node’s bit rate. We can increase the bandwidth utilization and let throughput be stable, controllable than current TCP under a WiFi environment. The main difference between our approach and others is that we don’t rely on dropping packets to limit the source node’s bit rate. That Is helpful to improve bandwidth utilization.

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