A data packet scheduling method, device and electronic equipment based on timeliness

Abstract

The embodiment of the present invention provides a time-based data packet scheduling method, device and electronic equipment, the method comprising: the data receiving end receives the current data packet sent by the data sending end; the current data packet is verified to obtain the verification result ; Calculate the AOI of the current data packet; determine the AOI of the current data packet, the number of retransmissions and the verification result as the state of the current data packet; calculate the state transition probability of the current data packet, and construct a state transition matrix; Packet loss rate; based on the state of the current data packet, the obtained action vector, state transition matrix, AOI and packet loss rate of the current data packet, a Markov model is constructed; the retransmission strategy of the current data packet is obtained by using the Markov model; The retransmission strategy of the current data packet is sent to the data sender, and the data sender sends the corresponding data packet according to the retransmission strategy of the current data packet. The embodiment of the present invention can improve the real-time performance of data decoding and playing.

Description

technical field [0001] The present invention relates to the technical field of data processing, in particular to a data packet scheduling method, device and electronic equipment based on timeliness. Background technique [0002] With the rapid development of the Internet, the playback of Internet videos is becoming more and more popular. The process of watching Internet video through wireless video transmission may include: the streaming media server obtains the compressed and encoded video data stream in real time, and when the user requests video data, the video data stream in the streaming media server is scheduled by the data scheduling device and sent to Client, the client receives video stream data and decodes and plays it. [0003] Video compression coding is mostly carried out using the H.264 standard, and the correlation between encoded video data is relatively strong. For example, take GOP (Group of Pictures) as an example. GOP is a group of continuous images, co...

AI Technical Summary

Problems solved by technology

In the process of wireless video data transmission, for the receiving end of decompressed and encoded video data, when the previous reference frame data is received incorrectly, the wrong reference frame data will affect the correctness of subsequent frame decoding, that is, the current frame is in Distortion during data transmission will cause greater distortion in subsequent frames, which will affect video playback

[0004] Aiming at the problem that the distortion of the current frame during the data transmission process will lead to greater distortion in the subsequent frames, which will affect the video playback, the existing HARQ (Hybrid-Automatic Repeat-reQuest, hybrid automatic repeat request) technology is used to realize the data packet Scheduling, the implementation process of this technology includes: the data sender generates data packets from the compressed and encoded video data stream, and then groups the data packets, each packet contains multiple data packets, and generates Redundancy check information, and then send the data packets in the group and the redundancy check information corresponding to the data packets to the data receiving end; the data receiving end receives the data packets sent by the data sending end and the redundancy check information corresponding to the data packets information, and then check the redundancy check information corresponding to each data packet, when the data packet verification fails, judge whether the number of retransmissions of the data packet is less than the preset maximum number of retransmissions, if yes, then Feedback NACK (Non-ACKnowledgement, non-confirmation) information to the data sender, so that the data sender retransmits the data packet, if not, discards the data packet, and when all the verification of the group of data packets is completed (including the data packet Retransmit successfully or discard data packets), decode the data packets in the group to realize video playback, and feed back ACK (ACKnowledgment, confirmation) information to the data sender at the same time, so that the data sender continues to send the next set of data

[0005] In the existing scheduling implementation process of data packets, a single data packet is checked, and whether the data packet is retransmitted is determined according to the preset maximum number of iterations. If the maximum number of iterations is set too small, there is still data distortion, which affects video playback. If the maximum number of iterations is set too large, it will take more time to retransmit the data, which will affect the real-time performance of data decoding and playback, and then affect the playback effect of the video.

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