Data stream of network is random. Arrival time, length and processing time of data packet are random variable.
网络中的数据流是不确定的，数据包的到达时间、长度和处理时间都是随机变量。
In this paper, we suggest to use PPS for the variable-length packet switching.
文章提出将多平面交换的结构用于变长数据包的交换。
On packet scheduling: A novel multi-stage buffering PPS and the Distributed Variable-Length Packet Scheduling (DVLPS) algorithm are present.
分组调度方面：提出了一种新的多级缓存并行分组交换结构和一种分布式变长分组调度算法（DVLPS）。
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