The design of packet scheduling strategy and algorithm is one of the most important issues for the high-speed packet-switched networks.

在高速分组交换网络中，分组调度策略和算法的设计是一个关键问题。

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As an important mechanism to provide guaranteed QoS in packet-switched networks, queuing scheduling algorithms have been widely researched in recent years.

作为分组交换网络中提供服务质量保证的一种重要机制，队列调度算法近年来得到了较为广泛的研究。

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Moreover, the proportional fairness scheduling strategy can be applied to design and improve the packet scheduling strategy and algorithms in packet-switched networks.

比例公平调度策略可以广泛应用于分组网络调度策略的设计研究和改进。

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Circuit-switched telephone systems have been replaced by packet-switched networks (most notably the Internet).

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But what starts out as government or military technology often ends up in commercial applications, as packet-switched networks and the global-positioning system demonstrate.

ECONOMIST: MONITOR

In time, packet networks will almost entirely replace more expensive and less capable circuit-switched networks.

ECONOMIST: Internet telephony