FEC-based selective retransmission system and retransmission method thereof

Abstract

The invention discloses a FEC-based selective retransmission system and a retransmission method thereof, belonging to the technical field of network communication and relating to selective retransmission method of FEC. The FEC-based selective retransmission system and the retransmitting method thereof aim mainly at solving disadvantages of existing retransmission method, such as large retransmission data size and blindness. The system consists of a packing device, an FEC encoder, an FEC decoder, an unpacking device, a retransmission grouping decoder, a retransmission grouping judger and a buffer area. If the FEC decoder fails to decode, the retransmission grouping judger picks out serial numbers of data packet needed to be retransmitted and the serial numbers are transmitted to the packing device; the packing device packs up the received data and transmits the data to the FEC encoder; the FEC encoder transmits the encoded data to the FEC decoder by a forward channel; the FEC decoder transmits decoded data to the unpacking device; the unpacking device transmits the unpacked data to the retransmission grouping decoder; and the retransmission grouping decoder transmits the resumed data to the buffer area. The invention has the advantages of low complexity and high realizability, and is applicable to real-time multimedia transmission and other data transmission.

Description

technical field [0001] The invention belongs to the technical field of network communication, relates to a selective retransmission method of FEC, and can be used for real-time multimedia transmission and other data transmission. Background technique [0002] With the rapid development of multimedia technology and communication networks, multimedia applications have become an indispensable part of the Internet and gradually become a part of people's daily life. Many real-time multimedia applications, such as video conferencing, VoIP and streaming media players, are constantly emerging. These applications not only facilitate information exchange but also enrich people's entertainment life. [0003] Although the current multimedia applications have made great progress, they are private and not flexible enough to provide users with a satisfactory visual experience, such as Real Player and Windows Media Player. With the continuous development of video compression technology, su...

AI Technical Summary

Problems solved by technology

Both the Type-II HARQ and Type-III HARQ are incrementally redundant HARQ, and the retransmitted data is blind, which means that part of the retransmitted data may not contribute to decoding at all, so the amount of retransmitted data also larger

Images