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Realization method and device of hybrid automatic repeat request (HARQ) feedback

An implementation method and reference configuration technology, applied in the communication field, can solve the problems of no design, LTE does not support cross-system carrier aggregation, etc.

Active Publication Date: 2016-07-20
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0018] However, since LTE does not support cross-system carrier aggregation at present, there is no HARQ feedback scheme for downlink data when TDD system and FDD system perform carrier aggregation.

Method used

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  • Realization method and device of hybrid automatic repeat request (HARQ) feedback
  • Realization method and device of hybrid automatic repeat request (HARQ) feedback
  • Realization method and device of hybrid automatic repeat request (HARQ) feedback

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Embodiment Construction

[0051] In view of the application scenario of cross-system carrier aggregation, in the embodiment of the present invention, a new HARQ feedback scheme is designed.

[0052] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0053] In the embodiment of the present invention, preferably, the TDD carrier is used as the primary carrier to aggregate with the FDD downlink carrier, that is, when PDSCH HARQ feedback is performed on the FDD downlink carrier, the corresponding ACK / NACK information can only be on the primary carrier (ie TDD carrier) To transfer, then see image 3 As shown, the detailed process for the terminal to perform PDSCHHARQ feedback is as follows:

[0054] Step 300: The terminal determines the TDD uplink and downlink reference configuration used when performing PDSCH HARQ feedback for the FDD downlink carrier, that is, determines the uplink subframe that can be used to carry the ACK / NACK inf...

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Abstract

The present invention discloses a realization method and device of HARQ feedback. The method comprises the steps of feeding back the ACK / NACK information corresponding to a downlink subframe (n-k) on an uplink subframe n of the time division duplex (TDD) uplink and downlink reference configuration indication, wherein k belongs to K, so that the ACK / NACK information corresponding to the downlink data can be fed back timely and accurately, and accordingly, the accurate data retransmission can be executed, and further the system performances are guaranteed effectively.

Description

[0001] The application for the present invention is a divisional application of the invention application whose application date is March 9, 2012, and the application number is 201210062357.3 and the invention title is "a method and device for implementing HARQ feedback". Technical field [0002] The present invention relates to the field of communications, and in particular to a method and device for implementing HARQ feedback. Background technique [0003] Currently, LTE (LongTerm Evolution, Long Term Evolution) supports three duplex modes, namely FDD (Frequency Division Duplex, Frequency Division Duplex), H-FDD (HalfFDD, Half Frequency Division Duplex), and TDD (Time Division Duplex, Time Division Duplex). [0004] Among them, FDD means that uplink transmission and downlink transmission are carried out on different carrier frequency bands, allowing base stations and terminals to receive and send signals at the same time; TDD means that uplink transmission and downlink transmission...

Claims

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Application Information

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IPC IPC(8): H04L1/16H04L1/18
CPCH04L1/1607H04L1/1861
Inventor 林亚男沈祖康司倩倩
Owner DATANG MOBILE COMM EQUIP CO LTD