Methods for sending and receiving demodulated reference signal (DM-RS) and devices for sending and receiving DM-RS

A technology for demodulating reference signals and sending methods, which is applied in wireless communication, electrical components, broadcast service distribution, etc., and can solve problems such as no technical solutions

Active Publication Date: 2012-03-14
CHINA MOBILE COMM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, there is no specific technical solution given in the prior art on how the base station transmits DM-RS in a Multimedia Broadcast Single Frequency Network (MBSFN, Multimedia Broadcast Single Frequency Network) subframe. How does a user terminal receive a DM-RS in an MBSFN subframe? -RS, no specific technical solution is given in the prior art

Method used

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  • Methods for sending and receiving demodulated reference signal (DM-RS) and devices for sending and receiving DM-RS
  • Methods for sending and receiving demodulated reference signal (DM-RS) and devices for sending and receiving DM-RS
  • Methods for sending and receiving demodulated reference signal (DM-RS) and devices for sending and receiving DM-RS

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Embodiment Construction

[0028] The main realization principles, specific implementation modes and corresponding beneficial effects of the technical solutions of the embodiments of the present invention will be described in detail below in conjunction with each accompanying drawing.

[0029] In order to support multiple-input-multiple-output (MIMO, Multiple-Input-Multiple-Output) transmission, when the base station sends DM-RS to the user terminal, it can send DM-RS based on two DM-RS ports. At this time, the base station and the user terminal The transmitted data stream is 2 data streams, and DM-RS can also be sent based on 4 DM-RS ports. At this time, the data stream transmitted between the base station and the user terminal is 4 data streams, and 8 DM-RS can also be used The port sends the DM-RS, and at this time, the data streams transmitted between the base station and the user terminal are 8 data streams.

[0030] In the embodiment of the present invention, 2 DM-RS ports, 4 DM-RS ports, and 8 DM...

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Abstract

The invention discloses methods for sending and receiving a demodulated reference signal (DM-RS) and devices for sending and receiving the DM-RS. The method for sending the DM-RS comprises the following steps of: from all physical resource blocks (PRB) which are included in a multimedia broadcast single frequency network (MBSFN) sub-frame to be sent to a user terminal, determining the PRB which is allocated to the user terminal; from resource elements (RE), which are included in the PRB, except the REs which carry a physical downlink control channel (PDCCH) and a common reference signal (CRS), determining the RE which carries the DM-RS; mapping the DM-RS into the determined RE; and sending the MBSFN sub-frame to the user terminal. The invention provides specific technical schemes that a base station sends the DM-RS in the MBSFN sub-frame and the user terminal receives the DM-RS in the MBSFN sub-frame.

Description

technical field [0001] The present invention relates to the technical field of mobile communication, in particular to a method and device for sending a demodulation reference signal, and a method and device for receiving it. Background technique [0002] A reference signal (Reference Signal, RS) is a known signal provided by a base station and sent to a user terminal for the user terminal to perform channel estimation or channel measurement. At present, four types of RS have been defined in the 3rd Generation Partnership Project (3GPP, 3rd Generation partnership project): Common Reference Signal (CRS, Common Reference Signal) of Release 8 (R8, Release 8), dedicated to R8 Reference signal (DRS, Dedicated Reference Signal), Demodulation Reference Signal (DM-RS, Demodulated Reference Signal) of Release 10 (R10, Release 10) and Channel State Information Reference Signal (CSI-RS, Channel State Information Reference) of R10 Signal). [0003] In an Orthogonal Frequency Division M...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/06H04W72/04
Inventor 史志华徐晓东王启星刘建军刘光毅
Owner CHINA MOBILE COMM GRP CO LTD
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