ACK/NACK (Acknowledgement/Negative Acknowledgement) feedback scheme for FDD (Frequency Division Duplexing) multi-subframe scheduling

A multi-subframe scheduling and subframe technology, applied in the direction of using the return channel for error prevention/detection, electrical components, wireless communication, etc., can solve problems such as inability to judge whether the data is correct, no PDCCH, PUCCH resource conflicts, etc., to achieve a solution Effect of PUCCH resource conflict

Inactive Publication Date: 2015-04-29
POTEVIO INFORMATION TECH
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Problems solved by technology

However, when the UE performs downlink multi-subframe scheduling, since there is only one PDCCH in the first subframe of multi-subframe scheduling, for other subframes, such as for figure 1 For subframes 2, 3, and 4 in , there is no corresponding PDCCH on the downlink spectrum of these subframes, so the PUCCH resource for which ACK/NACK is fed back cannot be determined according to the initial CCE of the PDCCH
If it is determined according to the initial

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  • ACK/NACK (Acknowledgement/Negative Acknowledgement) feedback scheme for FDD (Frequency Division Duplexing) multi-subframe scheduling
  • ACK/NACK (Acknowledgement/Negative Acknowledgement) feedback scheme for FDD (Frequency Division Duplexing) multi-subframe scheduling
  • ACK/NACK (Acknowledgement/Negative Acknowledgement) feedback scheme for FDD (Frequency Division Duplexing) multi-subframe scheduling

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[0037] Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are only used to illustrate the present invention, but not to limit the scope of the present invention.

[0038] It should be noted that, for the sake of brevity, the technical details described in the previous embodiments may not be repeated in the later embodiments; No elaboration. However, those skilled in the art should understand that, as long as there is no conflict, the technical details described in one embodiment are also applicable to other embodiments.

[0039] The core idea of ​​the present invention is that the eNB specially configures the PUCCH resources for the UE to feed back ACK / NACK in the uplink frequency spectrum of each subframe for downlink multi-subframe scheduling. One solution is to configure PUCCH resources for each UE in the uplink spectrum of each subframe; another solution is to c...

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Abstract

The invention discloses an ACK/NACK (Acknowledgement/Negative Acknowledgement) feedback method and system for FDD (Frequency Division Duplexing) downlink multi-subframe scheduling. The core concept of the ACK/NACK feedback method and system is that eNB specially configures PUCCH (Physical Uplink Control Channel) resources for ACK/NACK feedback during downlink multi-subframe scheduling in an uplink frequency spectrum of each subframe for UE (User Equipment). One solution is that the PUCCH resources are configured for each piece of UE in the uplink frequency spectrum of the subframe; another solution is that a plurality of or multiple groups of shared PUCCH resources are configured for multiple pieces of UE in the uplink frequency spectrum of the subframe, and then a PUCCH resource indication domain is defined in a PDCCH (Physical Downlink Control Channel) of each downlink subframe for indicating one or one group of PUCCH resources, so that the ACK/NACK during the downlink multi-subframe scheduling is fed back on the specially configured PUCCH resources. Therefore, the conflict of the PUCCH resources during the ACK/NACK feedback during the multi-subframe scheduling in FDD can be avoided.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and relates to an ACK / NACK feedback scheme for FDD downlink multi-subframe scheduling. Background technique [0002] The Long Term Evolution (LTE) system defines two ways of Frequency Division Duplexing (Frequency Division Duplexing, FDD) and Time Division Duplexing (Time Division Duplexing, TDD) at the same time. Two independent channels are required for FDD operation. One channel is used to transmit information downwards and the other channel is used to transmit information upwards. A guard band exists between the two channels. [0003] In LTE Rel-8 / 9 / 10 / 11, single-subframe scheduling is adopted for downlink dynamic services, that is, the Physical Downlink Shared Channel (PDSCH) in a subframe is controlled by the Physical Downlink Control Channel (PDCCH) of the current subframe. ) scheduling. In Rel-12, the small cell enhancement project is introduced. For the small cell scen...

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Application Information

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IPC IPC(8): H04L1/16H04W72/04
Inventor 鲁智陈哲池连刚
Owner POTEVIO INFORMATION TECH
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