集中处理信元缓冲的AT M交换机结构复杂、扩展性不好、不易保证高吞吐率，而由多级交换单元分布处理信元缓冲可克服这些缺点。
There are some drawbacks in ATM switch unifying buffer: complicated structure, lack of expansibility and difficulties in ensuring to ensure high throughput.
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）。
On packet scheduling: A novel multi-stage buffering PPS and the Distributed Variable-Length Packet Scheduling (DVLPS) algorithm are present.
并且提出数据中心多级数据交换模型，它是本文研究的重点。
Besides, This paper puts an emphasis on the multi-data transfer model of land resources data center.
在理论分析的基础上提出了一个大容量AT M交换机的结构设计方案，采用扩展模块和小交换模块多级互连方式实现了交换机大容量设计的目的。
Presents a architectural design of a high performance ATM switch based upon theoretic analysis, the mode of multi level interconnect of spread module and small switching module used.
在交换机上配置ISOLATE - USER -VLAN是一项比较复杂而容易出错的工作，在多级连交换机的环境下尤甚。
At switch install ISOLATE-USER-VLAN is an item more complications and fallible work, much more at the multi-grade-connect environment.
提出了一种应用于多级别光突发交换(OBS)网络中评估每一种级别业务的阻塞概率的分析模型。
In this paper, a novel simulation tool OBSns for Optical Burst Switching (OBS) was built by means of an extension to the network simulator (NS-2).
提出了一种应用于多级别光突发交换(OBS)网络中评估每一种级别业务的阻塞概率的分析模型。
In this paper, a novel simulation tool OBSns for Optical Burst Switching (OBS) was built by means of an extension to the network simulator (NS-2).
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