Transmitting method and device for downlink control channel

A technology of control channel and transmission method, which is applied in the direction of transmission path sub-channel allocation, signaling allocation, multi-frequency code system, etc., can solve problems such as downlink control information decoding failure, and achieve the effect of improving demodulation performance

Active Publication Date: 2012-03-07
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Aiming at the problem that the control field is interfered by the CRS of the adjacent cell, which leads to the failure of decoding the downlink control information, the present invention provides a downlink control channel transmission and device to at least solve the above problem

Method used

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  • Transmitting method and device for downlink control channel
  • Transmitting method and device for downlink control channel
  • Transmitting method and device for downlink control channel

Examples

Experimental program
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Effect test

Embodiment 1

[0057] In this embodiment, the method for base station mapping downlink control information mainly includes the following steps:

[0058] Step S02, the base station sends a signaling b1, the above-mentioned signaling indicates whether the deletion of the RE is allowed, 1 indicates that the deletion is allowed, and 0 indicates that the deletion is not allowed. In this embodiment, b1=1;

[0059] In this embodiment, the base station respectively indicates the frequency domain position and the time domain position of the RE that the UE is knocked out, specifically as follows:

[0060] Indicate the frequency domain position of the deleted RE (indicated by two REs as a group) in bitmap mode; the time domain position is configured as the first OFDM symbol in the subframe by signaling, or as the first OFDM symbol in the subframe and the second OFDM symbol, or, the penultimate OFDM symbol in the first slot of the subframe, the first OFDM symbol in the second slot of the subframe, and t...

Embodiment 2

[0073] In this embodiment, the method for base station mapping downlink control information mainly includes the following steps:

[0074] Step S02, the base station sends a signaling b1=1, the above-mentioned signaling indicates whether the RE is allowed to be deleted, 1 indicates that the RE is allowed to be deleted, and 0 indicates that the RE is not allowed to be deleted;

[0075] In this embodiment, the base station respectively indicates the frequency domain position and the time domain position of the RE that the UE is knocked out, specifically as follows:

[0076] The frequency domain position of the deleted RE is indicated by the bitmap method to indicate the corresponding RE, wherein the bitmap indication method excludes the RE where the CRS of the cell is located (two REs are used as a group to indicate); the time domain position is configured as sub- The first OFDM symbol in the frame, or the first and second OFDM symbols in the subframe, or, the third last OFDM sym...

Embodiment 3

[0090] In this embodiment, for a 2-antenna or 4-antenna scenario, a downlink control signaling mapping method that can further reduce signaling overhead is provided. In this embodiment, the method mainly includes the following steps:

[0091] Step S02, the base station sends a signaling b1=1, the above-mentioned signaling indicates whether the RE is allowed to be deleted, 1 indicates that the RE is allowed to be deleted, and 0 indicates that the RE is not allowed to be deleted;

[0092] In this embodiment, the frequency domain position of the deleted RE indicates the corresponding RE in bitmap mode (indicating 4 REs as a group); the time domain position is configured as the first OFDM symbol in the subframe through signaling, Either the first and second OFDM symbols in the subframe, or, the penultimate OFDM symbol in the first slot of the subframe, the first OFDM symbol in the second slot of the subframe, and the second OFDM symbol in the second slot of the subframe The time-d...

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Abstract

The invention discloses a transmitting method and device for a downlink control channel. The method comprises the steps of: sending a first signalling to user equipment (UE) by a base station, and informing the UE of whether to remove partial resource elements (REs) in a control domain; and when the first signalling indicates to remove the partial REs in the control domain, mapping the downlink control channel to a physical resource by the base station according to the control domain in which the partial REs are removed, and sending to the UE. According to the invention, the demodulating performance of the UE to the downlink control channel can be increased.

Description

technical field [0001] The present invention relates to the communication field, in particular, to a method and device for sending a downlink control channel. Background technique [0002] Currently, one of the key points of the advanced long-term evolution system (Long-Term Evolution advance, referred to as LTE-Advance) is to optimize indoor and hotspot scenarios. Heterogeneous networks (heterogeneous networks), as a technology that significantly increases system throughput and improves overall network efficiency, can well meet the requirements set forth by LTE Advance. The heterogeneous network structure introduces some transmitting nodes with lower transmission power than traditional cell base stations, including: Picocells, Femtocells, and relay stations (Relay) for signal relay. The introduction of these nodes can provide good coverage for indoor and hotspot scenarios; moreover, the transmission power of these nodes is small, which is convenient for flexible network de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04L1/00
CPCH04L5/0053H04L5/0073H04L5/0091
Inventor 李剑戴博薛妍
Owner ZTE CORP
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