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A reference signal sending method, receiving method and device in an unlicensed frequency band

An unlicensed frequency band and reference signal technology, applied in synchronization devices, wireless communications, digital transmission systems, etc., can solve problems such as missed opportunities to send DRS, inability to send DRS signals, and discontinuous transmission of data and pilot signals.

Active Publication Date: 2019-03-26
CHINA MOBILE COMM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The system on the unlicensed frequency band needs to comply with the requirements of LBT (listen before talk). It needs to monitor before sending data every time. The data can only be sent when the channel is idle, which will lead to discontinuous transmission of data and pilot signals.
In order for the UE to perform RRM measurement correctly, one possible solution is to continue to use the DRS signal of the Release 12 small cell and send it periodically, but the disadvantage of the Small cell DRS is that the time allowed by the base station to occupy the channel cannot match the DRS transmission period. Therefore, the opportunity to send DRS will be missed, resulting in the inability to send DRS signals for a period of time, and the terminal cannot perform normal RRM measurement

Method used

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  • A reference signal sending method, receiving method and device in an unlicensed frequency band
  • A reference signal sending method, receiving method and device in an unlicensed frequency band
  • A reference signal sending method, receiving method and device in an unlicensed frequency band

Examples

Experimental program
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Effect test

example 1

[0114] In this example, the position information of the transmission opportunity in the reference signal transmission period (that is, the DRS transmission period) is: the offset of the start subframe of the reference signal relative to the start subframe of the reference signal transmission period, Or, the offset of the start subframe of the reference signal relative to the start subframe of the previous reference signal. That is to say, in this example, the location information of the transmission opportunity within the reference signal transmission period is determined by the offset of the start subframe of the reference signal relative to the start subframe of the reference signal transmission period, or, The offset of the start subframe of the reference signal relative to the start subframe of the previous reference signal is represented.

[0115] Assuming that the DRS transmission period is represented by dmtc-Peroid, the offset (offset) of the DRS transmission period is...

example 2

[0128] In this example, the position information of the transmission opportunity in the reference signal transmission period (that is, the DRS transmission period) is: a bitmap corresponding to all subframes in the reference signal transmission period, where the reference signal is indicated in the bitmap The location of the starting subframe of . That is to say, in this example, the position information of the transmission opportunity in the reference signal sending period is represented by bitmaps corresponding to all subframes in the reference signal sending period.

[0129] For example, it is assumed that the DRS transmission period is 40ms, including 40 subframes of 1ms. In this embodiment, the eNB notifies the terminal of the DRS transmission opportunity (that is, the dmtc-Offsetsubset in Example 1) in the form of a bitmap (Bitmap) template (pattern), where the value of a certain bit is 1 (bit=1), indicating that The position of the subframe corresponding to this bit is...

example 3

[0134] In this example, the reference signal sending cycle further includes multiple non-overlapping sub-periods, and these sub-periods form a reference signal sending cycle. For convenience, each sub-period can have the same length. In this example, the transmission configuration information of the reference signal sent by the eNB to the UE also includes the duration of the sub-period. In the transmission configuration information, the position information of the transmission opportunity within the reference signal transmission period (ie, the DRS transmission period) is specifically: the offset of the starting subframe of the reference signal relative to the starting subframe of the corresponding subperiod . That is to say, in this example, the position information of the transmission opportunity within the reference signal sending period is represented by an offset of the starting subframe of the reference signal relative to the starting subframe of the corresponding subpe...

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Abstract

The invention provides a reference signal transmitting method, a receiving method and a device within a non-authorized frequency band. According to the invention, through increasing the transmitting chance of a DRS signal within the transmitting period of each reference signal, the phenomenon that reference signals cannot be continuously transmitted by an LTE system within the non-authorized frequency band is reduced or avoided. In this way, the transmitting / receiving of reference signals is ensured. Meanwhile, the normal RRM measurement of a terminal is ensured.

Description

technical field [0001] The present invention relates to a long term evolution (LTE, Long Term Evolution) system, in particular to a reference signal sending method, receiving method and device on an unlicensed frequency band (Uband, Unlicensed Bands). Background technique [0002] Existing LTE terminals perform coarse synchronization by detecting cell primary / secondary synchronization signals (PSS / SSS) to obtain timing information of the cell; perform fine synchronization by detecting pilot signals (CRS) to further maintain timing information. There are two types of terminal measurement configurations (measurement gap pattern) currently defined, as shown in Table 1. [0003] In 3GPP Release 12, an on / off mechanism is introduced for small cells. Under this mechanism, the base station in the off state only periodically sends a cell discovery signal (DRS, Discovery Reference Signal) for UE to do radio resource management. (RRM, Radio Resource Management) measurement. The peri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H04L5/00H04W56/00
Inventor 张晓然江小威潘峮李男
Owner CHINA MOBILE COMM GRP CO LTD
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