Channel measurement pilot transmission method and device

A technology of channel measurement pilot and measurement pilot, which is applied in the field of channel measurement pilot sending method and device, and can solve problems such as unproposed solutions

Inactive Publication Date: 2011-12-21
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, for the problem of how to send the channel measurement pilot in the LTE-A system, no effective solution has been proposed so far

Method used

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  • Channel measurement pilot transmission method and device
  • Channel measurement pilot transmission method and device
  • Channel measurement pilot transmission method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] figure 1 It is the transmission position of the downlink dedicated pilot of each cell, and its initial position is the pattern of Cell ID modulo 3 equal to 0. After the initial position is determined, the number of subcarriers shifted in the frequency domain is determined by Cell ID mod 3, for example, Cell ID mod 3=1, then move backward one subcarrier from the initial position.

[0056] After determining the transmission position of the downlink dedicated pilot of each cell in the group, before sending the channel measurement pilot to any cell in the group, first calculate the pattern index of each cell according to the following formula, and the resources corresponding to the three pattern indexes Time-frequency quadrature:

[0057] pattern index = mod ( cellID , 3 ) = 0 ...

Embodiment 2

[0063] figure 1 It is the transmission position of the downlink dedicated pilot of each cell, and its initial position is the pattern of Cell ID modulo 3 equal to 0. After the initial position is determined, CellID mod 3 determines the number of subcarriers shifted in the frequency domain, for example, Cell ID mod 3 = 1, then move backward one subcarrier from the initial position.

[0064] After determining the transmission positions of the downlink dedicated pilots of each cell in the group, a time-frequency resource (such as image 3 In pattern 1), before sending the channel measurement pilot to any cell in the group, the predetermined time-frequency resource is used as the initial time-frequency resource for sending the channel measurement pilot, and then according to the cell identity of the cell ( Cell ID) determines the shift index, that is, determines how to shift according to the following formula:

[0065] V shift = ...

Embodiment 3

[0072] After determining the transmission position of the downlink dedicated pilot of each cell in the group, before sending the channel measurement pilot to any cell in the group, first calculate the pattern index of each cell according to the following formula, and the resources corresponding to the three pattern indexes Time-frequency quadrature:

[0073] pattern index = mod ( cellID , 3 ) = 0 if mod ( cellID , 3 ) = 0 1 if mod ( ...

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Abstract

A method for transmitting channel measurement pilot is provided in the present invention. The method includes that: M cells constitute a group of channel measurement pilot orthogonal cells, the location of time-frequency resources for transmitting the channel measurement pilot by any cell in the group is orthogonal with the location of time-frequency resources for transmitting the channel measurement pilot by other cells in the group; for any cell in the group, the channel measurement pilot is transmitted by avoiding the time-frequency resources occupied by a downlink specific pilot of the present cell. The corresponding apparatus is also provided in the present invention. The present invention not only ensures the orthogonality of the channel measurement pilot pattern in one group of cells, meets the measurement requirement of coordinated multiple point transmission, but also avoids the downlink specific pilot of antenna port 5.

Description

technical field [0001] The present invention relates to the communication field, in particular to a channel measurement pilot sending method and device. Background technique [0002] In order to improve the throughput of cells and coordinate interference among cells, a new generation of wireless communication systems, such as Long-Term Evolution Advance (LTE-Advance for short), Advanced International Wireless Communication System (International Mobile Telecommunication Advance, IMT-Advance for short) and the like have introduced a Coordinate Multipoint Transmission and Reception technology (Coordinate Multipoint Transmission and Reception hereinafter referred to as CoMP) between network levels. [0003] The LTE / LTE-A system is based on Orthogonal Frequency Division Multiplexing (OFDM for short) technology. In OFDM systems, communication resources are in the form of time-frequency two dimensions. For example, in an LTE system, communication resources are divided in units of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26
CPCH04W72/0466H04L5/0048
Inventor 姜静张文峰孙云锋张晨晨
Owner ZTE CORP
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