Exchange unit chip, router and transmission method of cell information

Abstract

Provided are an exchange unit chip, a router and a method for sending cell information. The exchange unit chip includes a cell input module with a plurality of input ports, buffers cell information received via each input port, assigns data cells in the cell information according to a corresponding assignment rule and transmits the data cells to a queue engine module according to the assignment result; the queue engine module includes a plurality of independent data queue engine sub-modules, wherein each data queue engine sub-module receives the data cells transmitted by the cell input module according to the corresponding assignment rule and stores the data cells in corresponding queues in each data queue engine sub-module; and a cell output module having a plurality of output ports schedules the data cells according to a scheduling rule and sends the same out via the corresponding output ports. The embodiments of the invention can meet the higher traffic exchange requirement of the Internet.

Description

technical field [0001] The embodiment of the present invention relates to data exchange technology, in particular to a method for sending exchange unit chip, router and cell information. Background technique [0002] At present, the switching unit of a large-capacity router mainly adopts a shared cache structure. All input and output ports access the same cache. In each clock cycle (Clock Cycle), all input and output ports can read and write at the same time, which greatly improves the performance of the switching unit. processing power. However, due to the limitation of the cache read-write cycle (Memory access cycle), the cell length (cell length) that an N-in N-out switching unit can process at line speed and its link speed (link speed) have the following relationship: Under the condition that the main frequency is 400MHz dual-port read and write processing, link speed is 10Gbps, and meets the pure 64Byte cell line speed, N<=20, that is, the number of physical connec...

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Problems solved by technology

[0004] In the process of realizing the present invention, the inventors have found that there are at least the following problems in the prior art: the prior art does not solve the problem essentially, but uses independent small units to piece together a switching unit, and all the small units are completely Similarly, it is not conducive to the expansion of the system in terms of resource utilization and unit splicing processing; moreover, because data cells need to be distributed to different small units, it also increases the cost of distribution flow sharing and rearrangement, and may also be caused by uneven distribution resulting in performance degradation

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