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Network delay jitter smoothing method

A network delay and smoothing technology, which is applied in the field of network communication, can solve the problems of not being able to get close to the network delay jitter again, unable to reflect real-time performance and superiority, and large network delay, so as to achieve a good change in the size of the delay jitter, The effect of smoothing network jitter and reducing outliers

Active Publication Date: 2014-05-14
GUILIN UNIV OF ELECTRONIC TECH
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Problems solved by technology

This algorithm makes up for the shortcomings of the pure feedback buffer: when the data packet receiving time exceeds the set value, a special command will be used to control the device
There is a shortcoming in the MA algorithm: after encountering a large abnormal value of delay jitter, the adjustment value will become very large, and it cannot be close to the size of the network delay jitter in the experiment. At the same time, when receiving When processing data at the end, the network delay will become particularly large, which cannot reflect its real-time performance and superiority

Method used

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Embodiment Construction

[0045] The present invention will be further described in detail below in conjunction with the drawings and CPS network embodiments.

[0046] Hypothetical historical observations The source is evenly distributed, Add an outlier 80 to the 29th observed value, set the sliding window to 40, and the 40 observed values ​​are as attached Figure 4 . Take α=0.7. Specific steps are as follows:

[0047] Step 1: Add a function in the receiving and sending data packets of the controller and actuator, which is used to obtain the current physical time of the device. The actuator and the controller immediately return a data packet to each other when receiving the data packet, and the time interval is ignored as 0. For example, when the executor receives the i-th data packet, it records the current system time t i , immediately send a packet to the controller. When the controller receives the jth data packet, it records the current time t j , immediately send a data packet to the...

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Abstract

The invention discloses a network delay jitter smoothing method. The method includes the steps of forecasting the magnitude and variation trends of network jitter by means of an index smoothing forecasting method and setting the value of a data buffer by means of the forecasting result of the network jitter. Accordingly, changes of the network delay jitter can be well forecasted, abnormal values in the changed network jitter are effectively reduced, and the packet loss probability is lowered; compared with other methods, the method has certain superiority, and clock synchronization of various system modules is needless.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to a method for smoothing network delay and jitter. Background technique [0002] In occasions with strict jitter requirements, such as network control systems or physical information fusion systems (CPS), sensors acquire various information of specific physical objects (such as ambient temperature, noise, humidity, motor speed, and vehicle speed, etc.), and sent to the controller through the network. After the controller analyzes and calculates the user's command and physical information, it relies on the network to send a certain time-limited control command to the actuator. The executor executes control commands on specific physical objects at the correct time to change the state of the physical objects. The physical world, sensors, controllers, and actuators rely on communication networks to form a feedback loop [1] . [0003] Actuators can directly affect enti...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/885H04L49/9023
Inventor 张向利何刚张红梅叶进闫坤
Owner GUILIN UNIV OF ELECTRONIC TECH