For processing variable length packet, current routers usually separate the packet into the smaller fixed-size one before buffering, or simply provide the packet with a fixed-length buffer.

现代网络设备常采用固定长度缓冲区机制来缓冲可变长度数据包，或采用信元机制将可变长度数据包进行定长化处理后再完成缓冲操作。

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The sender tracks the packet loss status according to the algorithm-loss rate estimation based on variable frame size and switches two audio sample files in accordance with packet loss status.

传送端根据以变动框架长度为基础之 遗失率估算法，来估算目前网路上封包 遗失的状况，并以此作为切换高低音质档案的依据。

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