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A transmission method of a demodulation reference signal, base station, and user equipment

A technology for demodulating reference signals and transmission methods, applied in the field of long-term evolution advanced systems, and can solve problems affecting DMRS demodulation performance, etc.

Active Publication Date: 2019-02-15
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For DMRS enhancement, the demodulation performance of DMRS may be affected due to the limitation of the control channel during design. In addition, since PSS / SSS needs to be sent in NCT subframes, in order to avoid the collision between DMRS and PSS / SSS, it is necessary to perform DMRS enhanced design

Method used

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  • A transmission method of a demodulation reference signal, base station, and user equipment
  • A transmission method of a demodulation reference signal, base station, and user equipment
  • A transmission method of a demodulation reference signal, base station, and user equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0915] This embodiment provides a method for transmitting demodulation reference signals, which mainly includes:

[0916] The base station transmits multiple DMRS (demodulation reference signal) ports through FDM (frequency division multiplexing) and / or CDM (code division multiplexing) and / or TDM (time division multiplexing).

[0917] Specifically, the base station may transmit DMRS on at least one of the following OFDM symbol groups:

[0918] The OFDM symbol group includes: OFDM symbol group {0, 12}, OFDM symbol group {1, 13}, OFDM symbol group {0, 9}, OFDM symbol group {1, 10}, OFDM symbol group {0, 5}, OFDM symbol group {1, 6}, OFDM symbol group {0}, OFDM symbol group {1}, OFDM symbol group {2}, OFDM symbol group {3}, OFDM symbol group {1, 12}, OFDM Symbol group {2, 13}, OFDM symbol group {1, 9}, OFDM symbol group {2, 10}, OFDM symbol group {1, 5}, OFDM symbol group {2, 6}, OFDM symbol group {3, 13}, OFDM symbol group {3, 10}, OFDM symbol group {3, 6}, OFDM symbol group {1, 11},...

example 1

[0921] figure 1 The pattern of the DMRS in a PRB Pair in the Normal CP subframe is given. The base station sends the DMRS at the position of the resource element carrying the DMRS, and the terminal receives the DMRS at the position of the resource element carrying the DMRS.

[0922] When CP (Cyclic Prefix) is a common cyclic prefix length, and the corresponding subframe is a non-special subframe of subframe type 1 (FDD) or subframe type 2 (TDD), the base station is in OFDM symbol {0, 12} At least one of DMRS ports 7, 8, 11, 13 is transmitted on the {0,1,5,6,10,11}th subcarrier, and at least one of the DMRS ports 7,8,11,13 is transmitted on the {0,1,5,6 of the OFDM symbol {1,13} , 10, 11} at least one of DMRS ports 9, 10, 12, and 14 are transmitted on the subcarrier.

[0923] The terminal receives at least one of DMRS ports 7, 8, 11, and 13 on the {0, 1, 5, 6, 10, 11} subcarriers of the OFDM symbol {0, 12}, and in the OFDM symbol {1, 13} At least one of DMRS ports 9, 10, 12, and ...

example 2

[0925] figure 2 The pattern of the DMRS in a PRB Pair in the Normal CP subframe is given. The base station sends the DMRS at the position of the resource element carrying the DMRS, and the terminal receives the DMRS at the position of the resource element carrying the DMRS.

[0926] When the CP (Cyclic Prefix) is the length of the common cyclic prefix, and the corresponding subframe is a special subframe of subframe type 1 (FDD) or subframe type 2 (TDD), the configuration is: 3 or 4 or 8 special subframes In the frame, the base station transmits at least one of DMRS ports 7, 8, 11, and 13 on the {0, 1, 5, 6, 10, 11} subcarriers of the OFDM symbol {0, 9}. In the OFDM symbol {1, At least one of DMRS ports 9, 10, 12, and 14 is transmitted on the {0, 1, 5, 6, 10, 11}th subcarrier of 10}.

[0927] When the CP (cyclic prefix) is the length of the common cyclic prefix, the terminal receives DMRS ports 7, 8, 11, 13 on the {0, 1, 5, 6, 10, 11}th sub-carrier of the OFDM symbol {0, 9} At l...

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PUM

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Abstract

The present invention discloses a means of transmitting a demodulated reference signal and a base station, a user device, involving a long-term evolution of an advanced system. The present invention discloses a method of transmitting a demodulated reference signal, comprising: the base station will be a plurality of demodulated reference signal (DMRS) ports via frequency division multiplexing (FDM) and / or code division multiplexing (CDM) and / or time division multiplexing (TDM) transmitted. The present invention also discloses a base station and user device. The technical solution of this application makes the demodulation performance of DMRS have a large performance improvement, especially considering the use of the modulation method of 256QAM in the future, so that the interpolation performance of each PRB Pairs in a subframe is balanced, and the collision of DMRS and RCRS, PSS / SSS and CSI-RS is avoided.

Description

Technical field [0001] The invention relates to a long term evolution advanced system (Long term evolution advanced system, referred to as LTE-Advanced), and specifically relates to a method and equipment for transmitting demodulation reference signals in LTE-Advanced. Background technique [0002] In LTE Release R8 / R9, in order to measure the quality of the channel and demodulate the received data symbols, CRS (Common Reference Signal) is designed, and UE (User Equipment) can perform channel monitoring through CRS. Measurement to determine the UE to reselect the cell and switch to the target cell, and to measure the channel quality in the UE connection state. When the interference level is high, the physical layer can disconnect the connection through the high-level related radio link connection failure signaling . In LTE R10, in order to further improve the average spectrum utilization rate of the cell and the cell edge spectrum utilization rate and the throughput rate of each...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04L5/00H04L1/00
CPCH04L5/0014H04L5/0051H04L5/22H04L27/2607
Inventor 郭森宝孙云锋左志松张文峰张峻峰
Owner ZTE CORP