Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Data packet retransmission method based on network codes

A network coding and data packet technology, which is applied in the field of data packet retransmission based on network coding, can solve the problem that the application of network coding has not been studied, and achieve the effect of improving system performance.

Active Publication Date: 2014-01-29
CHONGQING UNIV OF POSTS & TELECOMM
View PDF4 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This special scenario is only applicable to some occasions, such as the downlink from the base station to the user, but in a single-hop wireless network with multiple sender multiple receivers (MSMR for short), network coding The application in retransmission has not been studied

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
  • Data packet retransmission method based on network codes
  • Data packet retransmission method based on network codes
  • Data packet retransmission method based on network codes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] A non-limiting embodiment is given below in conjunction with the accompanying drawings to further illustrate the present invention.

[0027] In the present invention, the wireless network we consider is a one-hop scenario, which contains n nodes, each node can be either a sender or a receiver, and all data packets can be directly transmitted without relay nodes. Assuming that each sender competes fairly for the transmission channel, use p eIndicates the probability of transmission failure. When the receiver does not receive the data packet or does not obtain the lost data packet through decoding, the sender performs retransmission. If network coding is not used, the traditional retransmission mechanism is to let the sender send the lost data packets separately, and the network coding retransmission mechanism can broadcast and send the encoded data packets formed by encoding multiple lost data packets in one time slot. we use figure 2 The example in is used to illustr...

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 provides a data packet retransmission method based on network codes. In the retransmission process, a data packet is transmitted through the network codes with the probability of pnc, the data packet is code combination of N lost data packets, and the N lost data packets comprise one lost data packet needing to be retransmitted by a sender and the other N-1 data packets lost by other senders. Considering compatibility, according to an existing IEEE802.11MAC protocol design, the transmission process of PNCRM is similar to IEEE802.11, an RTS-CTS-data packet-ACK or NAK handshake protocol is also used, an ACK frame is transmitted when transmission succeeds, and an NAK frame is transmitted when transmission fails, and retransmission is executed. Compared with the existing network coding technology, the PNCRM can be applied to an MSMR single-hop wireless network without a relay node, and system performance can be effectively improved by selecting the appropriate retransmission probability pnc and the coding degree N.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a data packet retransmission method based on network coding. Background technique [0002] In a wireless network, due to the influence of noise and multipath fading on the transmission channel, wireless communication has a more serious packet loss rate than traditional wired communication. In order to improve transmission reliability, error control technology needs to be adopted. ARQ (Automatic Retransmission-reQuest, automatic retransmission request) technology and FEC (Forward Error Correction, forward error correction) technology are two commonly used error control technologies. The automatic retransmission request realizes the reliable transmission of the network by the receiver requesting the sender to retransmit the wrong data packet or the lost data packet. Based on the automatic retransmission request method, the sender needs to rebroadcast and send...

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
IPC IPC(8): H04L1/00H04L1/18
Inventor 刘期烈吴阳阳李云曹傧封彬刘剑锋魏武李国军
Owner CHONGQING UNIV OF POSTS & TELECOMM
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com