Data packet transmission method, sending end device and receiving end device

Abstract

The embodiment of the invention provides a data packet transmission method, a sending end device and receiving end devices. The method comprises the following steps: after sending first batch of raw data packet to each receiving end device, receiving data packet loss information reported by each receiving end device; according to a lost packet set of each receiving end device, determining a total lost data packet set of all the receiving end devices; according to the total lost data packet set, determining the number of times for retransmitting a coded data packet; according to the number of times and the number of sent raw data packet, improving Vandermonde matrix to encode the coded data packet and determining the coded data packet retransmitted each time; and based on the determined coded data packet retransmitted each time, retransmitting corresponding coded data packet to each receiving end device when transmitting each time. By adopting the data packet transmission method, the sending end device and the receiving end device provided in the embodiment, the lost data packet can be retransmitted efficiently; and the timeliness and the reliability of the data transmission of a multicast communication system can be improved.

Description

technical field [0001] The present invention relates to the technical field of communication, and more specifically, to a data packet transmission method, a sending end device and a receiving end device. Background technique [0002] In recent years, the Internet of Things, cloud computing, and mobile Internet have developed in full swing, and various new applications have emerged one after another. More and more services have made bandwidth resources more tense. How to improve bandwidth utilization has become the most concerned research. One of the hotspots; and multicast technology can effectively improve the utilization rate of bandwidth, which has been widely used in network video, wireless routing, satellite communication and other fields; the communication system using multicast technology is called multicast communication system. Different from the point-to-point communication communication system, the multicast communication system is a communication system that incl...

AI Technical Summary

Problems solved by technology

[0003] In the current multicast communication system, after the sending end device sends a batch of data packets to each receiving end device, the receiving end device may lose different data packets due to the heterogeneity of the channel state, and the sending end device may lose different data packets. The end device retransmits a data packet lost by a receiving end device, which will cause the receiving end device that has received the data packet to repeatedly receive the data packet, resulting in a waste of bandwidth, and may even cause multicast when the number of receiving end devices is large. disaster; therefore, how to provide a data packet transmission method to efficiently realize the retransmission of lost data packets in a multicast communication system, and improve the timeliness and reliability of data transmission in a multicast communication system has become a technology in the art Questions for personnel to consider

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