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Feedback method for downlink transmission, base station and user terminal

A technology for base stations and user equipment, applied in the field of communication, can solve the problems of communication failure between the terminal and the network side, and the location of the link data transmission message is not specified, and achieves the effect of ensuring reliability.

Inactive Publication Date: 2016-03-02
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Aiming at the problem that the multi-carrier PDCCHDLCC in the related art does not specify the location of the feedback downlink data transmission message, resulting in communication failure between the terminal and the network side, no effective solution has been proposed yet

Method used

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  • Feedback method for downlink transmission, base station and user terminal
  • Feedback method for downlink transmission, base station and user terminal
  • Feedback method for downlink transmission, base station and user terminal

Examples

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Embodiment 1

[0048] In this embodiment, when the UE camps on, the PUCCHspace can be configured using a system message configuration method; when the UE accesses, the PUCCHspace is specified through radio resource control (RadioResourceControl, RRC for short) signaling.

[0049] figure 2 It is a flow chart of configuring PUCCHspace according to an embodiment of the present invention. Such as figure 2 shown, including the following steps:

[0050] In step S201, the UE camps on a cell, and the component carrier of the PUCCH on which it is located is DLCCx, where x is a symbol of the component carrier.

[0051] In step S202, the UE receives system information, for example, the component carrier indicating ACK / NACK feedback in SIB-2 is ULCCx, where x is the component carrier label, and the component carrier space is PUCCHspacexx, where the x before spacexx is the component carrier label in DLCCx, The latter x is the component carrier mark in DLCCx.

[0052] Preferably, in step S202, the c...

Embodiment 2

[0065] image 3 is a flowchart of feedback downlink data transmission according to an embodiment of the present invention, such as image 3 shown, including the following steps:

[0066] In step S302, the UE monitors the PDCCH on the PDCCHDLCCx.

[0067] Step S304, the UE receives the DL Assignment on PDCCHDLCCx.

[0068] In step S306, the UE receives a DL assignment on PDCCHDLCCx, and the DL assignment includes a carrier indicator field (Carrier Indicator Field, CIF for short).

[0069] In step S308, the UE physical layer receives downlink data from the DLCC indicated by the CIF and demodulates it into a transport block (Transport block, TB for short).

[0070] Step S310, UE physical layer receives downlink data from the local carrier DLCCx, and demodulates it into TB.

[0071] Step S312, the physical layer of the UE extracts HARQinformation from the DLassignment, the HARQinformation no longer includes CIF and is completely consistent with the R8 protocol, and sends the d...

Embodiment 3

[0080] Figure 4 is a schematic diagram according to a preferred embodiment of the present invention, such as Figure 4 As shown, downlink component carriers DLCC1, DLCC2, DLCC3 and uplink component carriers ULCC1 and ULCC2 are configured for UE; DLCC1 is associated with ULCC1, ULCC1 reserves PUCCHspace11 for DLCC1, DLCC2 and DLCC3 are associated with ULCC2, ULCC2 reserves PUCCHspace22 for DLCC2, and ULCC2 reserves PUCCHspace23 for DLCC3 , association and space reservation can be configured and determined according to the steps in the first preferred embodiment.

[0081] For the first transmission, DLCC1 receives DLassignmentwithoutCIF, the physical layer will receive and demodulate the downlink data on the DLCC1, and route the obtained PDSCHTB to the HARQMACentity1 corresponding to routingDLCC1, and HARQMACentity1 will store the TB in the HARQprocessbuffer of the HARQprocessID according to the HARQprocessID in the DLassignment , and try to decode, if the decoding fails, use th...

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Abstract

A method, base station and user terminal for downlink transmission feedback are disclosed in the present invention. The method includes the following steps: for each downlink component carrier in which a Physical Downlink Control Channel (PDCCH) locates, the base station configures a Physical Uplink Control Channel (PUCCH) space for feedback; the base station notifies the configured PUCCH spaces to the user device; the user device performs feedback on the PUCCH spaces for the downlink data transmission on the downlink component carriers. With the invention, the problem of communication failures between the terminal and the network side, caused by that the location of downlink data transmission feedback signaling for multi-carrier PDCCH Downlink Component Carrier (DL CC) is not designated in the related technology, is resolved, and furthermore the effect of guaranteeing multi-carrier downlink transmission reliability is achieved.

Description

technical field [0001] The present invention relates to the communication field, in particular, to a method for downlink transmission, a base station and a user terminal. Background technique [0002] Release 8 of the Frequency Division Duplex (FDD) system of the Long Term Evolution (LTE for short) system is a single-carrier system. In this system, there is only one pair of uplink carrier and downlink carrier, and the downlink carrier requires The uplink carrier is unique. Release 10 of the FDD system in the LTE system, that is, Long Term Evolution Advanced (LTE-Advanced for short), is a multi-carrier system. Multiple uplink component carriers (referred to as ULCC for short) and multiple downlink component carriers (referred to as DLCC for short) are running in the network of the multi-carrier system, and user equipment (User equipment, referred to as UE) can configure multiple uplink component carriers at the same time carrier and multiple downlink component carriers, whi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/16H04W72/04
CPCH04L5/0007H04L5/001H04W48/08H04W72/00H04W88/02H04W88/08
Inventor 王坚黄亚达
Owner ZTE CORP
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