Sending method and sending device for improving physical downlink control channel

A control channel and enhanced physical technology, applied in the field of communication, can solve problems such as inter-cell control channel interference, and achieve the effect of reducing control channel transmission interference

Active Publication Date: 2013-05-15
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] Aiming at the problem that the transmission of ePDCCH will cause interference to inter-cell control channels in the related art, the present invention provides a method and device for transmitting ePDCCH

Method used

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  • Sending method and sending device for improving physical downlink control channel
  • Sending method and sending device for improving physical downlink control channel
  • Sending method and sending device for improving physical downlink control channel

Examples

Experimental program
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Embodiment 1

[0141] This embodiment provides a downlink control channel transmission method. In this embodiment, the new physical downlink control channel (ePDCCH) adopts two transmission modes, one is a diversity transmission mode, and the other is a single antenna port or multiple antenna ports transfer mode.

[0142] In this embodiment, sending the downlink control channel includes: determining the pilot frequency of the new physical downlink control channel and determining the starting position of the ePDCCH in the first time slot in the subframe.

[0143] For determining the pilot frequency of the new physical downlink control channel (ePDCCH), the following method can be used to determine:

[0144] Method 1: When the new physical downlink control channel is in the diversity transmission mode, if the new physical downlink control channel is transmitted on a predetermined subframe on a compatible component carrier, the cell-specific reference signal is the guide of the new physical dow...

Embodiment 2

[0169] This embodiment provides a method for sending an ePDCCH. In this embodiment, two new transmission modes of the physical downlink control channel are defined, one is a diversity transmission mode, and the other is a single antenna port or multiple antenna port transmission mode.

[0170] The pilot determination method in this embodiment includes the following methods:

[0171] Method 1: When the new physical downlink control channel is in the diversity transmission mode, if the new physical downlink control channel is transmitted on a common subframe on a compatible component carrier, the cell-specific reference signal is the guide of the new physical downlink control channel If the new physical downlink control channel is transmitted on the MBSFN subframe on the compatible component carrier, or when the new physical downlink control channel is transmitted on the subframe of the incompatible carrier without the cell-specific reference signal, the user-specific reference s...

Embodiment 3

[0181] This embodiment provides an ePDCCH power configuration method. In this embodiment, the power of the ePDCCH is determined in the following manner.

[0182] way 1

[0183] The power ratio of the subcarrier unit power of the new physical downlink control channel data on the antenna port x to the subcarrier unit power ratio of the pilot corresponding to the new physical downlink control channel antenna port x is h1, and the value of h1 is the high-level signaling Configuration; eg: 1 / 2, 1 / 4, or, 2, 1, 1 / 2, 1 / 4, or, 2, 1, or, 2, 4, or, 1, 2, 4, etc.

[0184] way 2

[0185] When the new physical downlink control channel is a single-antenna port or multi-antenna port transmission mode, the h1 is a predefined value, for example: 1 for a single antenna port, 2 for 2 antenna ports, 2 for 4 antenna ports, Or, fixed to 2, or, fixed to 1;

[0186] way 3

[0187] When the new physical downlink control channel is in the diversity transmission mode and the user-specific reference s...

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Abstract

The invention discloses a sending method and a sending device for improving a physical downlink control channel. The sending method comprises the following steps: determining the initial position of the ePDCCH (physical downlink control channel) in a subframe based on high-level signaling and / or preset rules; sending pilot frequency of the ePDCCH and bearing data on the ePDCCH. According to the sending method and the sending device, interference between the ePDCCH and the downlink control channel is reduced, and downlink transmission efficiency is improved.

Description

technical field [0001] The present invention relates to the communication field, in particular, to a method and device for sending an enhanced Physical Downlink Control Channel (ePDCCH for short). Background technique [0002] Orthogonal Frequency Division Multiplexing (OFDM for short) technology is essentially a multi-carrier modulation communication technology, which is one of the core technologies in the fourth generation mobile communication (4G). In the frequency domain, the OFDM multipath channel exhibits frequency-selective fading characteristics. In order to overcome this fading, the channel needs to be divided into multiple sub-channels in the frequency domain. The spectral characteristics of each sub-channel are approximately flat, and each of the OFDM The sub-channels are orthogonal to each other, so the spectrums of the sub-channels are allowed to overlap each other, so that the spectrum resources can be utilized to the greatest extent. [0003] Multiple-Input M...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04W72/04
CPCH04L5/00H04L1/0036H04L1/0028H04L5/001H04W72/04H04L5/0023H04L5/0048H04L1/00H04L5/0053H04L5/0051H04L5/005H04L27/2613H04W72/23
Inventor 陈艺戬戴博左志松
Owner ZTE CORP
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