Method and device for determining positions of cell reference signals

A cell reference signal and reference signal technology, which is applied to the separation device of transmission path, pilot signal allocation, wireless communication and other directions

A cell reference signal and reference signal technology, which is applied to the separation device of transmission path, pilot signal allocation, wireless communication and other directions

CN101635950AInactive Publication Date: 2010-01-27ZTE CORP
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  • Method and device for determining positions of cell reference signals
  • Method and device for determining positions of cell reference signals
  • Method and device for determining positions of cell reference signals

Examples

Experimental program
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Effect test

no. 1 example

[0092] In the first embodiment, it is assumed that the CSI-RS positions currently available for sending different cells are k1, k2, ..., kn, and the relevant cell identifiers in the CoMP set are ID1, ID2, ..., IDm, (m

[0093] That is to say, all the cells in the CoMP concentration are sorted according to the size of the cell identifiers, and then mapped to corresponding available CSI-RS positions in sequence according to the sorted order.

[0094] Wherein, h is a fixed value, such as 0 or n-m; or, the value of h is notified by the base station to the target UE through signaling.

[0095] In the second embodiment, it is assumed that according to the sequence in which the UE receives cell identities, the relevant cell identities in the CoMP set are ID1, ID2, ..., IDm, and the positions of CSI-RS currently available for sending different cells are k1, k2, ... ., kn, ...

no. 3 example

[0098] In the third embodiment, the definition of the extended binomial coefficient is '> x y = x y x ≥ y 0 x y . Assume that the selected m positions are , 1≤s k ≤n,s k k+1 , then, the numbered index r = Σ k = 0 m - 1 '> n ...

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Abstract

The invention provides a method and a device for determining positions of cell reference signals. The method comprises the following steps: selecting a plurality of coordinate cell positions for transmitting CSI-RS of the coordinate cells from the positions for transmitting channel state information reference signals (CSI-RS) in difference cells; and determining the positions of CSI-RS of the coordinate cells according to marks of the coordinate cells. By using the method, target UE defines a plurality of cell positions transmitting CSI-RS, thereby achieving the goal of using a base station for transmitting data by measuring channel state information of a plurality of cells and reporting the information to the base station so as to ensure the application of multi-point coordinate transmission and reception (CoMP) technique to improve the overall performance of the system.

Description

technical field [0001] The present invention relates to Long Term Evolution (LTE, Long Term Evolution) technology, in particular to a method and device for determining the location of a cell reference signal. Background technique [0002] Orthogonal Frequency Division Multiplexing (OFDM) technology is essentially a multi-carrier modulation communication technology, and OFDM technology is one of the core technologies in the fourth generation of mobile communication. In the frequency domain, the OFDM multipath channel exhibits frequency-selective fading characteristics. In order to overcome this fading, the channel is divided into multiple sub-channels in the frequency domain. The spectral characteristics of each sub-channel are approximately flat, and each sub-channel of OFDM The channels are orthogonal to each other. Therefore, spectrums of sub-channels are allowed to overlap with each other, so that spectrum resources can be utilized to the greatest extent. [0003] Multi...

Claims

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Application Information

Patent Timeline
27 Jan 2010
Publication
CN101635950A
IPC
H04W24/10; H04L27/26; H04B1/707
CPC
H04L5/0094; H04L5/0035; H04L5/0007; H04L5/0048; H04J11/0053; H04L5/0053
Inventors
戴博; 郁光辉