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DRS transmission method and device

A technology for discovering reference signals and symbols, which is applied in the field of DRS transmission of discovery reference signals, and can solve the problems of base stations and carriers losing DRS transmission opportunities.

Active Publication Date: 2017-05-10
CHINA MOBILE COMM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] In order to solve the problem that other base stations and carriers lose DRS transmission opportunities due to the multiplexing transmission of PDSCH and DRS on a certain base station or a certain carrier, the present invention provides a method and device for discovering reference signal DRS transmission

Method used

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  • DRS transmission method and device
  • DRS transmission method and device

Examples

Experimental program
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Effect test

no. 1 example

[0060] In this embodiment, the DRS is multiplexed in the channel area and transmitted to the terminal on the unlicensed frequency band carrier of the authorized assisted access LAA in the LTE system, wherein the channel area includes at least the physical downlink shared channel PDSCH area, and in A guard interval of a partial OFDM symbol length is preset on the OFDM symbol where the PDSCH region before the DRS is sent.

[0061] Specifically, the PDSCH area may be a data area carried by the PDSCH, or an area filled with occupancy signals on the PDSCH, which is not specifically limited here. In addition, the channel area can also include the physical downlink control channel PDCCH area or the enhanced physical downlink control channel EPDCCH area, that is, on the unlicensed frequency carrier of the authorized assisted access LAA in the LTE system, the DRS can be multiplexed on the PDSCH and PDCCH The DRS is transmitted to the terminal in the area composed of the PDSCH and the E...

no. 2 example

[0065] Such as Figure 5 As shown, it is a flowchart of a method for DRS transmission applied to a base station in the second embodiment of the present invention, and this embodiment includes the following steps:

[0066] Step 101, setting the position configuration information of the guard interval on the OFDM symbol and setting the time length of the guard interval on the OFDM symbol.

[0067] In this step, when setting the position configuration information of the guard interval on the OFDM symbol, the base station can determine the position of the guard interval on the OFDM symbol based on whether the position of the start symbol for sending the DRS is the first OFDM symbol of a subframe To set, specifically, the position configuration information carries the position of the guard interval on the OFDM symbol.

[0068] Specifically, when the position of the start symbol for sending the DRS is the first OFDM symbol of a subframe, the guard interval may be set on the last OF...

no. 3 example

[0086] In this embodiment, the terminal receives the DRS sent by the base station and multiplexes the DRS transmitted in the channel area on the unlicensed frequency band carrier authorized for assisted access LAA in the LTE system, wherein the channel area includes at least the physical downlink shared channel PDSCH area, In addition, a guard interval of a partial OFDM symbol length is preset on the OFDM symbol where the PDSCH region before sending the DRS is located.

[0087] Specifically, the PDSCH area may be a data area carried by the PDSCH, or an area filled with occupancy signals on the PDSCH, which is not specifically limited here. In addition, the channel area can also include the Physical Downlink Control Channel PDCCH area or the Enhanced Physical Downlink Control Channel EPDCCH area, that is, the terminal can also receive the unlicensed frequency band carrier that is authorized for auxiliary access LAA in the LTE system sent by the base station, and multiplex it in ...

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Abstract

The invention provides a DRS transmission method and device. The method comprises: a DRS is multiplexed to a channel region and is transmitted to a terminal at a non-licensed frequency band carrier of a licensed assisted access (LAA) in an LTE system, wherein the channel region at least includes a PDSCH area and a guard interval with the part of OFDM symbol length is preset at an OFDM symbol where the PDSCH area is located before DRS sending. Therefore, a problem that other base stations and carriers lose DRS transmission opportunities because of PDSCH and DRS multiplexing transmission at a certain base station or a certain carrier can be solved.

Description

technical field [0001] The present invention relates to the field of wireless transmission, in particular to a method and device for discovering reference signal (DRS) transmission. Background technique [0002] A variety of transmission technologies can be used to provide wireless communication transmission in the unlicensed frequency band, such as WLAN technology. For existing technologies and equipment that use unlicensed frequency bands for transmission, in order to ensure the fairness of different devices accessing channels, there are different regulations on the use of unlicensed frequency bands in the world. For example, the European Spectrum Regulatory Agency requires the equipment to have the LBT (Listen Before Talk, listen first, then transmit) function, that is, to detect whether the channel is idle before accessing the channel, which will result in that the available resources for the transmission service cannot be guaranteed, resulting The service quality trans...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04W74/08
CPCH04L27/261H04W74/0833
Inventor 刘建军侯雪颖柯颋王锐沈晓冬
Owner CHINA MOBILE COMM GRP CO LTD
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