System flow controlling method

A control method and technology of system flow, applied in transmission systems, digital transmission systems, data exchange details, etc., can solve problems such as unsatisfactory system flow control, and achieve good system flow control effect, good throughput rate, and high system cumulative throughput. amount of effect

Inactive Publication Date: 2004-11-24
HUAWEI TECH CO LTD
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Problems solved by technology

[0011] The purpose of the present invention is to overcome the limitations of the existing technology on message types and the shortcomings of unsatisfactory system flow control, and propose a system flow control method, which can improve the flow rate of the system under the flow model of high-end equipment. Throughput rate and flow control effect during overload; at the same time, different packet types can be configured for different flow control curves to achieve a more optimized flow control effect

Method used

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Embodiment Construction

[0040] An embodiment of a system flow control method proposed by the present invention is described in detail as follows:

[0041] This embodiment includes two parts: the processing when the system is initialized and the processing of the message arriving at the device at time t; wherein,

[0042] The processing steps during system initialization include:

[0043] (1) Flow control parameters of different priority levels and different types of packets (TCP SYN, other IP, UDP, TCP) according to user configuration (or system default): minimum discard idle queue threshold, maximum discard idle queue threshold, maximum discard Probability and other flow control parameters, the discretized DPT table calculation is carried out; because the discard probability curve of WRED is a slanted line (such as figure 1 shown), in the digital system, it needs to be discretized according to the needs, the principle is shown in figure 2 , which is to divide the minimum threshold to the maximum th...

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Abstract

The method includes the follows: calculating out discretization probability table; adjusting maximum discarding probability value as per message type, processing message arrived to the equipment at t times; calculating message arrival speed rate in between time t' and time t, average queue length of idle queue at time t, integrated average idle queue length; calculating out index value of table item for discarding probability to obtain message transmission probability P(t) in the period; comparing probability p(t) with random number P generated currently to decide whether the message is discarded or is retransmitted.

Description

technical field [0001] This technology belongs to the technical field of data communication QoS (Quality of Service, quality of service), and particularly relates to the realization technology of system flow control in Diffserv (Differentiated Service, differential service). Background technique [0002] In today's data network, with the further deepening of the network evolution trend of triple play (voice, video, data) and the establishment of the de facto standard of TCP / IP network technology, the quality of service provided on the original best-effort data network It has increasingly become an urgent need for operators to have IP network equipment. IP network equipment must be able to distinguish voice, video, and data services, and provide different forwarding qualities according to the characteristics of these different services, which has become an important research topic of IP QoS. At the same time, because network resources are limited, the management and utilizat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/08H04L47/32
Inventor 李晓武
Owner HUAWEI TECH CO LTD
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