Method and appts. of realizing ATM general physical testing and operation interface flow shaping

Abstract

The invention discloses a method and device for realizing ATM general physical testing and operation interface traffic shaping, which is applied between the physical interface and the switching interface of an ATM transmission node using the UTOPIA interface to transmit cells. In the incoming direction, the cell receiver Receive cells from the physical interface according to the timing, the cell write buffer controller will store the received cells into the dual-port RAM of the cell buffer, the sending rate controller controls the interval of sending cells, and the cell read buffer The controller reads the cells from the dual-port RAM of the cell buffer according to the cell read request of the cell sender, and the cell sender sends the read cells to the switching interface according to the sending timing requirements. The same is true for the outgoing direction from the switched interface to the physical interface. The invention inserts a cache in the physical link of the UTOPIA, controls the peak cell rate, can reduce the burst cell flow, and ensures the high-speed processing capability of the cell.

Description

technical field [0001] The invention relates to network flow control technology, more specifically, a method and device for realizing flow control at an ATM cell transmission node. Background technique [0002] With the rapid development of network requirements, the requirements for ATM network access are also developing rapidly. The increase of data transmission flow on the ATM network will inevitably lead to a sharp increase of cell flow on some access equipment or transmission equipment. Especially the flow of burst cell, if no measures are taken to control it, it will cause cell transmission block and reduce the processing capacity of ATM special chip. In order to make the flow of the cells meet the requirements, it is necessary to buffer the cells and control the minimum interval of cell transmission with the dedicated chip to achieve the purpose of controlling the flow. [0003] The Chinese patent No. 96195299.7 discloses an "ATM traffic adjustment" technology, which...

AI Technical Summary

Problems solved by technology

However, this method only controls the sending rate of cells at the source end, and does not propose a specific method for network flow control in the process of physical link transmission and at each node.

Although the average rate of cells is controlled, the burst peak rate of cells will increase significantly after passing through some access and transmission nodes, which will still cause the processing capacity of some dedicated chips to decline and the response speed to be slow

Images