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Control information transmission and reception method, base station and user equipment

A technology for controlling information and sending method

Active Publication Date: 2016-08-03
HUAWEI DEVICE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, for the localized E-PDCCH, if multiple candidate E-PDCCHs are mapped in the same or the same group of RB pairs in the search space, it often happens that multiple candidate E-PDCCHs are not available , so that the base station cannot send the E-PDCCH to the UE

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  • Control information transmission and reception method, base station and user equipment
  • Control information transmission and reception method, base station and user equipment
  • Control information transmission and reception method, base station and user equipment

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Embodiment Construction

[0067] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0068] figure 1 It is a flow chart of Embodiment 1 of the control information sending method of the present invention, as shown in figure 1 As shown, the method of this embodiment may include:

[0069] Step 101. Determine the search space corresponding to the UE in the subframe, and the search space maps one or more localized candidate E-PDCCHs ...

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Abstract

Embodiments of the present invention provide a method for sending and receiving control information, a base station, and user equipment. A method for sending control information, comprising: determining a search space corresponding to a user equipment UE in a subframe, the search space mapping one or more local formulas of an aggregation level in the same resource block RB pair or the same group of RB pairs The optional enhanced physical downlink control channel E-PDCCH; the demodulation reference signal DMRS port required to determine the one or more localized candidate E-PDCCHs, where different DMRS ports correspond to different localized Candidate E-PDCCH: select a candidate E-PDCCH from the search space to send control information, and send a reference signal of a DMRS port corresponding to the selected candidate E-PDCCH. The embodiments of the present invention can alleviate the problem of E-PDCCH blocking, and improve the reliability of the E-PDCCH of the UE.

Description

technical field [0001] Embodiments of the present invention relate to communication technologies, and in particular to a method for sending and receiving control information, a base station, and user equipment. Background technique [0002] The existing Long Term Evolution (hereinafter referred to as: LTE) system introduces a physical downlink control channel (Physical Downlink Control CHannel, hereinafter referred to as: PDCCH) based on precoding transmission, that is, an enhanced (Extended) PDCCH (hereinafter referred to as: E-PDCCH) . According to different mapping methods, E-PDCCH can be divided into localized E-PDCCH and distributed E-PDCCH. For the localized E-PDCCH, it is mapped in a resource block (ResourceBlock, hereinafter referred to as: RB) pair or a group of adjacent RB pairs, and the base station can report the The channel state of the channel is better, and the localized E-PDCCH is sent on the RB pair with better channel conditions, so as to obtain the frequ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L5/00H04L1/00
CPCH04L5/0053H04L5/0023H04L5/0051H04W72/23
Inventor 李迎阳
Owner HUAWEI DEVICE CO LTD