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Method for controlling flow of data transmisison

A data transmission and flow control technology, applied in the field of flow control, can solve the problems of FIFO design and use, such as difficulty in grasping and controlling, and achieve the effects of reducing design costs, saving resources, and saving storage resources

Inactive Publication Date: 2003-10-15
HUAWEI TECH CO LTD
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  • Claims
  • Application Information

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Problems solved by technology

The contradiction between these two aspects makes the design and use of FIFO in flow control difficult to grasp and control

Method used

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  • Method for controlling flow of data transmisison
  • Method for controlling flow of data transmisison
  • Method for controlling flow of data transmisison

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Experimental program
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Embodiment Construction

[0015] exist figure 2 , 3 T is the length of the time stamp, and this parameter can be arbitrarily set according to the buffering and processing capabilities of the downstream device. If the throughput capacity of the downlink device is relatively strong, the T value can be set slightly larger, otherwise it needs to be set slightly smaller. 1, 2, 3, 4, 5 are the data packet flags input by the device, 1 represents the first data packet, 2 represents the second data packet, 3 represents the third data packet, and so on, n1, n2, n3, n4, n5... are the effective byte lengths of each data packet.

[0016] The present invention is realized by FPGA logic. The data packets can be classified and processed according to needs, that is, different priorities are used for different types of data packets, and statistics, analysis and processing are performed respectively. For each type of data message, one of the following methods can be used respectively.

[0017] exist figure 2 , wh...

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Abstract

The invention relates to a flux controlling method of data transmission. The upstream transmission equipment transmits data bags to the FIFO and RAM of the downstream receiving equipment. The FIFO / RAM controls the input transmission speed at a terminal. A time scale is set at the input terminal, and data flux could be statistically calculated according to the time scale. When the data flux reach or excess the predetermined limiting flux speed, the redundant data bags will be cast. At the same time, FIFO / RAM controls the output transmission rate to meet requirements of the downstream receiving equipment. Not only the flux control is realized, but also the resource of buffer storage is saved. So that the design cost will be reduced. It could be widely used in data transmission and communication.

Description

technical field [0001] The present invention relates to a flow control method, and more particularly, to a flow control method in programmable logic design. Background technique [0002] At present, a more commonly used flow control technology is a flow control technology similar to the store-and-forward form such as figure 1 As shown, that is to say, the data packets of uncertain rate are first input into the FIFO of a predetermined size from the entrance, and then transmitted to the downstream equipment at the fixed rate set by the exit of the FIFO according to the user's processing capability. In this design, the FIFO should be as large as possible to reduce the loss of data packets during bursts. When the number of incoming packets exceeds the capacity of the FIFO due to bursts, the redundant packets will be discarded. Therefore, the accommodating degree of FIFO directly affects the reliable performance of data packet transmission. [0003] Those skilled in the art kn...

Claims

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Application Information

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IPC IPC(8): H04L12/08H04L47/32
Inventor 周恩松郝迁邓晓林
Owner HUAWEI TECH CO LTD
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