Measurement pilot transmission method and device

A technology for measuring pilot frequency and sending method, applied in the field of communication, can solve the problems such as the small number of OFDM symbols and the inability to effectively support the transmission of measurement pilot frequency, and achieve the effect of good measurement performance

Inactive Publication Date: 2011-07-06
CHINA ACAD OF TELECOMM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Through the above analysis, it can be seen that under the requirements of current measurement pilot design and traditional design methods, the number of OFDM symbols that can be used for measurement pilot transmission is very small, which cannot effectively support the transmission of measurement pilots

Method used

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  • Measurement pilot transmission method and device
  • Measurement pilot transmission method and device

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Experimental program
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Effect test

Embodiment 1

[0196] Embodiment 1: In order to avoid the negative impact that CSI-RS power boost may have on R9 / 10 demodulation, under conventional CP, configure the maximum number of common ports (CRS) of LTE as 2, and configure the number of OFDM symbols of PDCCH When is not greater than 3, it can be used as the RE Pattern for CSI-RS transmission such as Figure 5 shown. According to the REP and REPG grouping methods given in section 4.2, let the frequency domain interval between two REs in the REP be N=6, we can get Figure 5 The REP, REPG Pattern shown. It is worth pointing out that the numbering method of REP can be arbitrary, such as Figure 8 Another REP, REPG grouping method is given.

[0197] by Figure 5 Or 8 as an example, the mapping method of REPG to cell and REP to antenna port is given as follows:

[0198] Suppose a cluster of cells has N cluster = When composed of 6 cells with 4 antenna ports, it can be used for ID N ID cell The REPG of CSI-RS transmitted by the 4 an...

Embodiment 2

[0220] Embodiment 2: Under the conventional CP, when the maximum number of common ports (CRS) of LTE is configured as 2, and the number of OFDM symbols of PDCCH is configured as no more than 3, the RE Pattern that can be used as CSI-RS transmission is as follows Figure 1 shows. Figure 5 Given the grouping method of REP and REPG, if in REP, the frequency domain interval between two REs is N=6, it can be obtained Figure 9 Or the illustration of REP, REPG shown in 10.

[0221] by Figure 9 Or 10 as an example, the following gives the mapping method of REPG to cell and REP to antenna port:

[0222] Suppose a cluster of cells has N cluster = When composed of 8 cells with 4 antenna ports, it can be used for ID N ID cell The REPG of CSI-RS transmitted by the 4 antenna ports of the cell is:

[0223] REPG Index = N ID cell mod ( 8 )

[02...

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Abstract

The invention discloses a measurement pilot transmission method, which realizes the transmission of a measurement pilot. A measurement pilot area comprises more than one resource element pair (REP), each REP comprises two resource elements (RE), and the each REP corresponds to an REP identifier. The transmission method comprises the following steps of: acquiring the REP identifier allocated to each antenna port of a cell by a base station side by using cell configuration information according to a set rule; and transmitting the measurement pilot of the each antenna port of the cell on the RE corresponding to the REP identifier. In the scheme of the invention, the REs for the transmission of a channel status information reference signal (CSI-RS) are divided into the REPs, and the REP identifiers allocated to the antenna ports of the cell are acquired by utilizing the known cell configuration information of the base station side and a terminal side according to the set rule, so that the mapping of the multi-cell measurement pilot is realized, the insertion of the measurement pilot of long term evolution-advanced (LTE-A) and the measurement of a channel are further realized, and good measurement performance is obtained.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method and device for transmitting a measurement pilot. Background technique [0002] The LTE-A standardization work is in progress, and in order to meet its peak rate requirements, 8X8 MIMO has become a key technology. In this case, it is necessary to configure the reference signals of the eight antenna ports respectively. While ensuring system performance, the overhead introduced by the reference signal is reduced as much as possible. The 3GPP conference adopts the method of separately designing and optimizing the measurement pilot (CSI-RS) and demodulation pilot (DMRS), that is, the demodulation adopts a dedicated Pilot, the measurement uses the measurement pilot. [0003] Figure 1a It is a schematic diagram of a subframe structure with a normal (Normal) CP cyclic prefix (Cyclic Prefix, CP). like Figure 1a As shown, under Normal CP, the DMRS of streams 1-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/08H04B1/713H04L27/26
Inventor 王正海缪德山徐婧肖国军
Owner CHINA ACAD OF TELECOMM TECH
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