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A flow control method and device

A flow control and flow control frame technology, applied in the field of communication, can solve the problems that the effect of flow control is not very good and the flow control is excessive, and achieve the effect of easy implementation and simple realization.

Active Publication Date: 2016-07-27
ZTE CORP
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Problems solved by technology

[0008] However, there are certain disadvantages in this processing method, that is, the choice of flow control time pausetime
The pausetime is set in advance, if the pausetime is set too large, the flow control will be excessive; if the pausetime is set too small, the flow control effect may not be very good

Method used

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  • A flow control method and device

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Embodiment Construction

[0041] The core idea of ​​the present invention is to set multiple thresholds and dynamically adjust the pausetime, so that the system can intelligently adjust the flow control intensity, and perform slight flow control in the initial stage of congestion; increase the flow control intensity when severe congestion occurs.

[0042] The flow control method provided by the present invention is as image 3 shown, including:

[0043] Step 301: Based on the flow control FIFO depth, set at least three mutually disjoint threshold ranges, and the flow control time corresponding to the threshold ranges;

[0044] Among them, the threshold range can be continuous, for example, the preset threshold range is [0, XON), [XON, XOFF), [XOFF, +∞), or, [0, XON), [XON, MIDDLE), [MIDDLE, XOFF), [XOFF, +∞). Certainly, the threshold range may also be discontinuous, for example, [0, XON), [MIDDLE, XOFF), [XOFF, +∞]).

[0045] Step 302: Set different pausetimes for different threshold ranges, and the...

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Abstract

The present invention provides a flow control method, including: setting at least three mutually disjoint threshold ranges, and the flow control time corresponding to the threshold ranges, and the flow control time of the threshold range with a large threshold value is greater than that with a smaller threshold value The flow control time corresponding to the threshold range; when the packet enters the flow control queue, the current average queue length is calculated, wherein the current average queue length is obtained according to the current flow control queue length and the average queue length obtained from the previous calculation; when When the current average queue length is higher than the minimum threshold range, a flow control frame is sent, and the flow control frame carries a flow control time, and the flow control time is the flow control time corresponding to the threshold range where the current average queue length is located. The invention also provides a flow control device. The invention can perceive port congestion in advance, perform back pressure operation in time, and send flow control frames. The intensity of flow control is gradually increased to avoid excessive flow control and traffic oscillation.

Description

technical field [0001] The present invention relates to communication technology, in particular to a flow control method and device. Background technique [0002] According to the IEEE802.3x protocol, there are two ways of flow control: XON / XOFF and depletion type. [0003] XON / XOFF mechanism: A mechanism that uses the flow control frame wake-up function to work. The flow control frame is a PAUSE (pause) frame. Set the thresholds XON and XOFF, and when the receiving first-in-first-out (FirstInputFirstOutput, FIFO) of one party reaches the high threshold XOFF, a PAUSE frame is sent to the opposite end. A time parameter is carried in the PAUSE frame, which means that the party receiving the PAUSE frame will suspend sending data, that is, the flow control time; if the time parameter is not 0, the party receiving the PAUSE frame will stop sending data packets; if the The time parameter is equal to 0, which means that the party receiving the PAUSE frame can send data immediate...

Claims

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Application Information

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IPC IPC(8): H04L12/70
CPCH04L47/266H04L47/29H04L47/30
Inventor 王庆东
Owner ZTE CORP
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