CPS delay jitter buffering method

Abstract

The invention provides a CPS delay jitter buffering method. The CPS delay jitter buffering method comprises the steps of obtaining network delay initial data; setting a sliding window used for recording multiple unilateral delay variables which are closest to the current time; removing relatively big unilateral delay variables in the sliding window and performing mapping transformation for the residual data in the sliding window; aiming at the data after the mapping transformation, solving a first prediction value by utilizing a derivative least square prediction model; performing inverse mapping for the first prediction value; aiming at the data after the inverse mapping and the u%-bit data of the residual data in the sliding window after sequencing, selecting the bigger one as a second prediction value, wherein the u% is arranged based on an experience; and calculating a feedback delay prediction value based on the second prediction value. According to the CPS delay jitter buffering method, the size of a feedback delay zone can be set reasonably, and network jitter can be smoothed.

Description

technical field [0001] The present invention relates to the technical field of network communication, in particular to a CPS delay jitter buffering method. Background technique [0002] In CPS, sensor nodes need to sense environmental changes in real time, decision-making control modules need to process and make decisions based on real-time data, and actuators need to cooperate to control physical processes. Sensor nodes, decision-making control modules and actuator nodes rely on wireless networks to form a closed loop. Because CPS introduces the communication process, it will inevitably bring network delay. If the time delay is too large, it will affect the real-time and synchronization of the system, especially the synchronization between various execution modules in the system. Moreover, there are various complex factors in the communication network, such as transmission delay, delay jitter and packet loss caused by congestion and channel quality, etc. These problems wi...

AI Technical Summary

Problems solved by technology

However, the ESM algorithm will be affected by the large unilateral delay variable in the observed value, resulting in a relatively large predicted value, resulting in an increase in delay, thereby affecting the real-time and synchronization of the system

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