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DM-RS (Demodulation Reference Signal) pattern indicating method and device

A DM-RS and pattern technology, applied in the field of communication, can solve the problem of high overhead and achieve the effect of reducing overhead

Active Publication Date: 2015-01-21
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In the prior art, the eNB notifies the UE to use the DM-RS pattern by adding a new field in the downlink control information (DCI) signaling of the physical layer to indicate the DM-RS pattern; This method requires an additional new field, so the overhead of the Physical Downlink Control Channel (PDCCH) is relatively large

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  • DM-RS (Demodulation Reference Signal) pattern indicating method and device

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Embodiment Construction

[0068] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention

[0069] In order to achieve the purpose of reducing the PDCCH overhead when the eNB notifies the UE to use the DM-RS pattern, the present invention provides a DM-RS pattern indication method, such as figure 2 shown, including steps:

[0070] S11. Obtain a specific field in the downlink control information DCI;

[0071] In this application, in order to achieve the purpose of reducing PDCCH overhead when the eNB notifies the UE to use the DM-RS pattern, a specif...

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Abstract

A method and apparatus for indicating a Demodulation Reference Signal (DM-RS) pattern. The method includes: obtaining a specific field in Downlink Control Information (DCI); determining the corresponding DM-RS pattern according to the specific field. In the process of reducing the cost of pilots and control signaling by reducing reference signals, in the present invention, the UE concludes the DM-RS pattern selected by the eNB according to the field relating to downlink channel quality in DCI, or, the field with redundancy. Hence, unlike the prior art, the eNB does not need to add additional new fields to indicate the DM-RS pattern used on the UE, thereby reducing the cost of the pilots and control signaling.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a method and a device for indicating a DM-RS pattern. Background technique [0002] The 3rd Generation Partnership Project (3GPP) Long Term Evolution-Advanced (LTE-A) Rel-10 / 11 / 12 version is the Long Term Evolution (LTE) Rel-8 / 9 version enhancement, the LTE-A system has higher bandwidth requirements than the LTE system, and supports a peak data rate of up to 1G / s. In order to meet the requirements of LTE-A, the LTE-A system uses the carrier aggregation (Component Aggregation, CA) technology as its method to expand the system bandwidth, and uses a large number of multi-antenna enhancement technologies (Multiple-Input Multiple-Output, Multiple-Input Multiple-Output, MIMO) and link adaptation techniques to increase data rate and system performance. [0003] In the LTE-A Rel-12 version, enhancement for hotspot areas has become a hot topic. Hotspot areas include ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00
CPCH04L1/0003H04L1/0025H04L1/00H04L1/1896
Inventor 张兴炜
Owner HUAWEI TECH CO LTD