Method of data transmission using HARQ

A data and data transmission technology, applied in the field of data transmission, can solve problems such as system efficiency degradation, degradation, occurrence time, etc., and achieve the effect of improving data transmission throughput and efficiency

Inactive Publication Date: 2010-09-22
LG ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage of the FEC scheme is that the system efficiency deteriorates in a good channel environment
However, the disadvantage of the ARQ scheme is that a time delay occurs and the system efficiency deteriorates in a bad channel environment
In asynchronous HARQ, overhead occurs due to extra signaling

Method used

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  • Method of data transmission using HARQ
  • Method of data transmission using HARQ

Examples

Experimental program
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Embodiment Construction

[0033] figure 1 A wireless communication system is shown. The wireless communication system can be widely deployed to provide various communication services, such as voice, packet data, and so on.

[0034] refer to figure 1 , the wireless communication system includes a base station (BS) 20 and at least one user equipment (UE) 10 . The UE 10 may be fixed or mobile, and other terms may be used to refer to user equipment, such as mobile station (MS), user terminal (UT), subscriber station (SS), wireless device, and the like. The BS 20 is generally a fixed station that communicates with the UE 10, and other terms may be used to represent the BS 20, such as Node B, Base Transceiver System (BTS: Base TransceiverSystem), access point, and the like. Within the coverage of the BS 20 there are one or more cells.

[0035] The downlink means the communication link from the BS 20 to the UE 10, and the uplink means the communication link from the UE10 to the BS20. In the downlink, the t...

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PUM

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Abstract

A method of transmitting data from a user terminal to a base station using a hybrid automatic repeat request (HARQ) scheme with a plurality of redundancy versions of said data, each of the redundancy versions (RV) indicating a transmission start position of a data block in a circular buffer is disclosed. For each retransmission, the redundancy version to be used by considering the previously used redundancy version and a predetermined sequence is determined. Within one sequence, at least two redundancy versions following each other have non consecutive start positions.

Description

technical field [0001] The present invention relates to wireless communication, and more particularly, to a data transmission method using Hybrid Automatic Repeat Request (HARQ). Background technique [0002] Error correction schemes are used to ensure the reliability of communications. Examples of error correction schemes include Forward Error Correction (FEC) schemes and Automatic Repeat Request (ARQ) schemes. In the FEC scheme, the transmitter encodes the information bits with an additional error correction code and then transmits the information bits. The receiver demodulates the received signal, then decodes the error correction code, and subsequently recovers the transmitted information. According to this decoding process, received signal errors can be corrected. In contrast, in ARQ schemes, the transmitter corrects errors by retransmitting data. Examples of the ARQ scheme include stop and wait (SAW: stop and wait), go back N steps (GBN: go-back-N), selective repea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18
CPCH04L1/0033H04L1/0067H04L1/1621H04L1/1819H04L1/1874
Inventor 金奉会卢东昱安俊基徐东延金学成朴贤旭李大远
Owner LG ELECTRONICS INC
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