Method and system for cell dispatching

Abstract

The invention discloses a method and a system for cell dispatching. The method comprises the following steps: for each cell link cache unit on each input interface of switching equipment, when flow rate of cells stored in the cell link cache unit is larger than or equal to the preset threshold of cell flow, the switching equipment performs link flow control operation to uplink switched access equipment, so as to control the switched access equipment to send cell flow to the switching equipment. The cell link cache unit comprises a unicast cell link cache unit for storing unicast cells and a multicast cell link cache unit for storing multicast cells. The switching equipment executes cell switching operation to the stored unicast and multicast cells, and sends the unicast and multicast cells which have received cell switching operation at each output port. By adopting the invention, congestion between unicast operation and multicast operation is avoided, the data switching efficiency is improved, and the system resource is saved.

Description

technical field [0001] The present invention relates to the communication field, in particular to a cell scheduling method and system. Background technique [0002] Switching network is one of the core technologies of large-capacity high-end routers. In order to meet the demand for a large switching capacity of more than T bits, at present, a multi-level interconnected switching network is mainly used. The multi-level interconnected switching network mainly includes a switching access chip (Switch Access Fabric, referred to as SA) and a switching chip (SwitchFabric , referred to as SF), the following combined with the attached figure 1 Briefly describe the structure of the switching network. [0003] figure 1 is a schematic structural diagram of a switching network in related technologies, such as figure 1 As shown, the switching network mainly includes an SA located on a line card and an SF located on a switch card, wherein the SA can be logically divided into an uplink...

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Problems solved by technology

However, since multicast cells need to be copied in SF, and the destination port is uncertain, SF is prone to various congestion situations, and then unicast services and multicast services are mutually blocked, which greatly reduces switching efficiency

[0005] However, for the mutual blocking problem of unicast service and multicast service in the prior art, no effective solution has been proposed yet

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