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Method and device for allocating DM-RS (Demodulation Reference Signal) ports

A technology of DM-RS and allocation method, applied in the field of communication, can solve the problems that the interference cannot be eliminated and the interference situation cannot be considered, and achieve the effect of accurate channel estimation

Active Publication Date: 2014-05-07
CHINA MOBILE COMM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] It can be seen from the above examples that according to the existing DM-RS port allocation scheme, the actual interference situation cannot be considered. For the above figure 2 and image 3 In some cases, the same DM-RS port is used between actually adjacent users with large interference, which leads to the situation that the interference cannot be eliminated

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  • Method and device for allocating DM-RS (Demodulation Reference Signal) ports
  • Method and device for allocating DM-RS (Demodulation Reference Signal) ports

Examples

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Embodiment Construction

[0059] In order to solve the problems in the prior art, the embodiment of the present invention proposes a method for DM-RS port allocation according to the interference between terminal devices, which can be applied to the situation of multi-cell coordination for DM-RS port allocation. It can also be applied to the situation of DM-RS port allocation in a single cell, to make up for the limitation of the prior art for DM-RS port allocation in MU-MIMO and CoMP scenarios.

[0060] Such as Figure 4 Shown is a schematic flow chart of a method for allocating DM-RS ports proposed in an embodiment of the present invention. The method specifically includes the following steps:

[0061] Step S401: Obtain interference information between two terminal devices in each terminal device group.

[0062] Wherein, the terminal device group is composed of every two terminal devices belonging to the same cell and / or adjacent cells.

[0063] Specifically, the implementation process of this step includes:...

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Abstract

The embodiment of the invention discloses a method and device for allocating DM-RS (Demodulation Reference Signal) ports. With the adoption of the technical scheme provided by the embodiment of the invention, a DM-RS port can be allocated for each terminal device through coordinating according to an actual interference condition among terminal devices, thus the channel estimation of a DM-RS is accurate and the condition that the interference among terminal devices which respectively belong to adjacent cells cannot be considered when the DM-RS ports are allocated according to cells can be avoided.

Description

Technical field [0001] The embodiment of the present invention relates to the field of communication technology, and in particular to a method and device for allocating DM-RS ports. Background technique [0002] A reference signal (Reference Signal, RS), which is often referred to as a pilot signal, is a known signal provided by the transmitting end to the receiving end for channel estimation or channel measurement. [0003] Currently, 4 RSs have been defined in 3GPP (3rd Generation Partnership Project): [0004] CRS (Common Reference Signal); [0005] DRS (Dedicated Reference Signal, dedicated reference signal); [0006] DM-RS (Demodulation Reference Signal, demodulation reference signal); [0007] CSI-RS (Channel State Information Reference Signal, channel state information reference signal). [0008] In the existing technical solution, in the LTE-A (Long Term Evolution Advanced) downlink transmission, the UE (User Equipment) will use the DM-RS dedicated reference signal to detect the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W72/08H04W72/12H04B7/06H04B7/08H04W72/54
Inventor 王启星刘建军史志华徐晓东刘光毅
Owner CHINA MOBILE COMM GRP CO LTD