Method for packet retransmission employing feedback information

A technology of feedback information and packet retransmission, applied in the field of packet retransmission, can solve problems such as diversity limitation

Inactive Publication Date: 2010-12-08
LG ELECTRONICS INC
View PDF4 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] However, it is limited in obtaining diversity for practical channels where the transmitter does not know the channel information

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
  • Method for packet retransmission employing feedback information
  • Method for packet retransmission employing feedback information
  • Method for packet retransmission employing feedback information

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0054] Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, it should be understood that various modifications can be made to the following embodiments of the present invention, and the scope of the present invention is not limited to the following embodiments.

[0055] When a wireless system determines a modulation order or a coding rate of an initial packet, channel quality information or channel state information at a location where a packet should be transmitted is required. Channel quality information or channel state information is transmitted through feedback.

[0056] There are several methods of communicating channel information. Among these methods, generally used methods are methods in which a single CQI value calculated for the entire system bandwidth according to a given measurement rule is transmitted, or the transmitter notifies the receiver of the channel state given for packet tran...

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

A method for packet retransmission employing feedback information is disclosed. The method for packet retransmission employing feedback information comprises receiving reception acknowledgement information from a receiver after a transmitter transmits packets, the reception acknowledgement information representing channel status information and decoding success / failure of the packets; and changing a retransmission mode in accordance with the channel status information if the reception acknowledgement information represents decoding failure, and transmitting retransmission packets of the packets in accordance with the changed retransmission mode. Thus, it is possible to improve decoding probability of the receiver and increase efficiency of retransmission.

Description

technical field [0001] The present invention relates to a method of packet retransmission, more particularly, to a method of packet retransmission using feedback information, in which method, the transmitter changes the retransmission mode and retransmits the packet according to the information fed back from the receiver to enhance the decoding probability of received packets. Background technique [0002] Next-generation communication systems are designed to use wideband frequency bandwidths and increase data rates between transmitters and receivers. In order to construct such a communication system, an OFDM-based modulation mode is mainly used. Examples of wireless communication standards using OFDM-based modulation schemes include 3GPP LTE(+), 3GPP2 UMB(+), IEEE 802.16(d, e, m), IEEE 802.11, IEEE 802.20, IEEE 802.22, and HiperLAN. Examples of user classification schemes in a communication system include an FDMA scheme in which users are categorized based on a frequency ...

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): H04L1/18
CPCH04L5/0007H04L5/0053H04L5/006H04L1/1893H04L1/1671H04L5/0046H04L1/0026
Inventor 卢珉锡权英现郭真三金东哲文诚颢韩承希李玹佑
Owner LG ELECTRONICS INC
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