Transmission method of ACK/NACK in enhanced long-period evolution system and base station

A transmission method and technology of the base station, applied in the direction of error prevention/detection using the return channel, which can solve the problem of no feedback ACK/NACK, etc.

Active Publication Date: 2010-09-08
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0027] However, in the prior art, there is still the case of multi-codeword transmission, and the prior art does not have a scheme for feeding back ACK / NACK in the case of multi-codewords

Method used

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  • Transmission method of ACK/NACK in enhanced long-period evolution system and base station
  • Transmission method of ACK/NACK in enhanced long-period evolution system and base station
  • Transmission method of ACK/NACK in enhanced long-period evolution system and base station

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Embodiment Construction

[0051] Embodiments of the present invention provide an ACK / NACK transmission method and a base station in an LTE-A system.

[0052] In order to enable those skilled in the art to better understand the solution of the present invention, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings and implementation manners.

[0053] First, single codewords and multiple codewords are explained.

[0054] A single codeword corresponds to one TB to be transmitted in the MAC layer, and a multi-codeword corresponds to multiple TBs to be transmitted in the MAC layer. Simply put, if one TB is to be transmitted in the MAC layer, a single codeword is required, and if n TBs are to be transmitted in the MAC layer, n multi-codewords are required.

[0055] For each TB, an ACK / NACK needs to be fed back. That is to say, for multiple codewords, each codeword requires an ACK / NACK feedback.

[0056] In addition, it should be p...

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Abstract

The invention relates to a transmission method of ACK / NACK in a LTE-A system and a base station. The transmission method of ACK / NACK in a LET-A system is used for two code words in multi-code word and comprises the following steps that: QPSK is used for modulating an ACK / NACK combination which is fed back by two code words; a resource which corresponds to one pre-defined code word in the two codewords on a PHICH signal channel is used for transmitting the ACK / NACK combination of two code words which is modulated by QPSK. By utilizing the method, the feedback of ACK / NACK can be realized underthe condition of multi-code word.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to an ACK / NACK transmission method and a base station in an LTE-A system. Background technique [0002] Hybrid Automatic Repeat reQuest (HARQ) is a data packet retransmission mechanism established at the physical layer in order to ensure reliable transmission of data packets in communication. For example, the HARQ technology is used in 3G standards including WCDMA and TS-SCDMA, in HSUPA and HSDPA, and in the Long Term Evolution (LTE) plan that is being formulated. [0003] The basic principle of HARQ is: the retransmission of the data packet is performed between the sending end and the receiving end, and one of the sending end and the receiving end is a base station, and the other is a terminal. Feedback messages include acknowledgment (ACK) and acknowledgment (NACK). The receiving end receives the data packet sent by the sending end. If it is received correctly, it...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/16H04L1/18
Inventor 赵锐肖国军索士强
Owner DATANG MOBILE COMM EQUIP CO LTD
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