Method, device and system for transmitting demodulation reference signals (DMRSs)

A demodulation reference signal, transmission layer technology, applied in the field of transmission demodulation reference signal, can solve the problem that DMRS orthogonality cannot be guaranteed

Active Publication Date: 2014-06-04
DATANG MOBILE COMM EQUIP CO LTD
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Problems solved by technology

[0009] Embodiments of the present invention provide a method, device, and system for transmitting demodulation reference signals, which are used to solve the problem that in the existing port configuration mode, when multiple user equipments The problem of orthogonality

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  • Method, device and system for transmitting demodulation reference signals (DMRSs)
  • Method, device and system for transmitting demodulation reference signals (DMRSs)

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Embodiment Construction

[0036] The network side of the present invention allocates different antenna ports to multiple UEs performing MU-MIMO communication on the same resource, ensuring that when multiple user equipments perform MU-MIMO communication on the same resource, the DMRS of each user equipment are orthogonal to each other. This improves system capacity and system flexibility.

[0037] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0038] see figure 2 As shown, in this embodiment of the present invention, the method for sending a demodulation reference signal specifically includes the following steps:

[0039] Step 21: The network side selects a corresponding relationship with the same number of transmission layers as each UE for at least two UEs performing MU-MIMO communication on the same resource according to the correspondence table between the antenna ports and the number of transmission layers, and se...

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Abstract

The invention discloses a method, device and system for transmitting demodulation reference signals (DMRSs), for solving the problem that the orthogonality of each UE pilot frequency cannot be ensued when multiple UE is simultaneously accessed in the prior art. The method provided by the embodiments of the invention comprises: according to a correspondence table of an antenna port and a transmission layer number, respectively selecting a correspondence provided with the same transmission layer number as each UE for at least two UE which performs MU-MIMO communication at the same resource, and respectively distributing the antenna ports in each selected correspondence to the corresponding UE, the different antenna ports being distributed to the different UE; and notifying the corresponding UE of the index numbers of the selected correspondence, and sending the DMRSs through the antenna ports in the selected correspondence. According to the embodiments of the invention, the orthogonality of the DMRSs of multiple simultaneously accessed UE can be ensured, the system capacity is enhanced, simultaneous access of UE with multiple different transmission layer numbers can be supported, and the system flexibility is improved.

Description

technical field [0001] The present invention relates to the field of communication technologies, and in particular, to a method, device and system for transmitting a demodulation reference signal. Background technique [0002] In a long term evolution / long term evolution upgrade (Long Term Evolution, LTE / Long Term Evolution-Advanced, LTE-A) system, a demodulation reference signal (Demodulation Reference Signal, DMRS) is mainly used for physical downlink shared channel (Physical Downlink Shared Channel, PDSCH) ) for channel estimation and synchronization so that the receiver can successfully demodulate the data. In the Coordinated Multiple Point transmission (CoMP) system, in order to improve the spectral efficiency, the Multiple User-Multiple Input Multiple Output (MU-MIMO) technology can be used to transmit data, that is, the data transmission of multiple cells. The base station transmits data to multiple user equipments (User Equipment, UE) at the same time, or simultaneo...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/04
Inventor 卫瑞平苏昕荆梅芳拉盖施高秋彬
Owner DATANG MOBILE COMM EQUIP CO LTD
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