Three levels exchange structure with characters of high and low dual speeds, strict ranking and without blocking expansion

A switching structure and high-speed technology, which is applied in the field of optical fiber communication technology and network, can solve the problem that the low-speed level g can not be guaranteed to be non-blocking, and achieve the effect of low cost and low cost

Inactive Publication Date: 2003-07-23
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

However, the above-mentioned extended switching structure of the conventional three-level CLOS network interconnection mode is an extended switching structure for a...

Method used

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  • Three levels exchange structure with characters of high and low dual speeds, strict ranking and without blocking expansion
  • Three levels exchange structure with characters of high and low dual speeds, strict ranking and without blocking expansion
  • Three levels exchange structure with characters of high and low dual speeds, strict ranking and without blocking expansion

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Embodiment 1

[0026] When N=8, as attached figure 1 The strictly non-blocking extended three-level switching structure of the high and low dual-rate levels shown becomes that the first level is R 8×16 matrix switches, the second level is 16 R×R matrix switches, and the third level is R 16 ×8 matrix switch. Attached figure 1 The connection mode shown interconnects the above three levels, which can ensure that the switching structures of high and low rate levels are strictly non-blocking after expansion.

Embodiment 2

[0028] In Embodiment 1, the numbers of input and output ports of the first stage and the third stage are complementary, the matrix switches of the first stage are 8×16, and the numbers of the third stage are 16×8. Therefore, a matrix switch 8×16 in the first stage and a matrix switch 16×8 in the third stage can be combined into a 24×24 matrix switch shared by the first stage and the third stage, and the second stage remains unchanged, becoming A folded extended switch fabric, as attached Figure 4 shown. According to this connection mode, the strict non-blocking performance after the expansion of the switching structure of the high and low dual-rate levels can be guaranteed at the same time.

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Abstract

The three levels exchange structure is suitable to the strict expansion without blocking of the exchange structure in the network node devices and the implement of the interlinkage without blocking in large scale of network. The main character is that the structure is composed of the optical fiber and the matrix switches with high and low dual speeds. Based on the general three levels CLOS network interconnection mode and the general CLOS strict condition without blocking, with a small quantity of matrix switches being added, according to the specified connection mode and the specified quantitative conditions being met, the strict non-blocking expansion of the exchange structure with the high and low dual speeds can be realized to construct the non-blocking exchange structure with super large scale and super large capability.

Description

Technical field: [0001] The invention relates to a three-level switching structure with strict non-blocking expansion of high and low dual-rate levels, which is suitable for the fields of optical fiber communication technology and network technology. technical background: [0002] With the development of high-speed broadband in the telecommunications network, in the telecommunications backbone network and the core metropolitan area network, it is necessary to perform crossover, grooming, cascading, scheduling, add-drop and other processing on the channel connections of various speed levels, and the optical cross-connection has appeared. Equipment, electrical cross-connect equipment, add-drop multiplexing equipment and other telecom backbone network and core metropolitan area network node equipment. At the same time, an electrical crossover chip with a grooming function has also appeared. [0003] Use N×N to represent the switching port scale of the electrical cross-connect ...

Claims

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Application Information

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IPC IPC(8): H04M3/00H04Q3/32H04Q3/52H04Q11/00
Inventor 胡卫生金耀辉姜淳王悦
Owner SHANGHAI JIAO TONG UNIV
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