FEC-based selective retransmission system and retransmission method thereof

A selective retransmission and retransmission technology, which is applied in the field of network communication, can solve the problem of large data volume and achieve the effects of low complexity, easy implementation, and reduced packet retransmission

Inactive Publication Date: 2009-10-21
XIDIAN UNIV
View PDF0 Cites 22 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • FEC-based selective retransmission system and retransmission method thereof
  • FEC-based selective retransmission system and retransmission method thereof
  • FEC-based selective retransmission system and retransmission method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0038] refer to figure 1 , The selective retransmission system of the present invention is mainly composed of an encapsulator, an FEC encoder, an FEC decoder, a decapsulator, a retransmission packet decoder, a retransmission packet judger and a buffer. in:

[0039] Encapsulator: used for encapsulating retransmission data packets and non-retransmission data packets with a set data packet format, and passing them to the FEC encoder. Packet encapsulation format such as figure 2 As shown, the encapsulated data packet is composed of two parts, the retransmission flag and the payload. When the retransmission flag of the data packet is true, the payload in the data packet is data information; when the retransmission flag of the data packet is false, , the payload in the data packet is the location information of the retransmission data packet. The encapsulation format of the location information part of the retransmission packet is as follows: image 3 As shown, it is composed o...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

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...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18H04L12/56H04L1/16
Inventor 宋彬古立峰秦浩
Owner XIDIAN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap