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Mapping method and system of cell resources in cooperative measurement set during multipoint cooperative transmission

A technology of measurement aggregation and multi-point cooperation, applied in wireless communication, electrical components, etc., can solve the problem of reducing system throughput and achieve the effect of improving system throughput

Active Publication Date: 2011-07-06
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to improve the measurement quality of channel measurement, there is a proposal in the prior art that when a target cell sends a channel state information reference signal, other cells in the measurement set do not send the channel state information reference signal on the time-frequency resource where the target cell sends the channel state information reference signal. any signal, this approach significantly reduces system throughput

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  • Mapping method and system of cell resources in cooperative measurement set during multipoint cooperative transmission
  • Mapping method and system of cell resources in cooperative measurement set during multipoint cooperative transmission
  • Mapping method and system of cell resources in cooperative measurement set during multipoint cooperative transmission

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Embodiment 1

[0052] When the target cell in the coordinated measurement set sends the channel state information reference signal, other cells in the coordinated measurement set only send data in some physical resource blocks of the time-frequency resource corresponding to the channel state information reference signal of the target cell, and send data in other No data is sent on physical resource blocks.

[0053] The selection of some physical resource blocks can be distinguished by the parity type of the index numbers. Specifically, when the target cell in the coordinated measurement set sends the channel state information reference signal, other cells in the coordinated measurement set only use odd-indexed resource blocks in the time-frequency resources corresponding to the channel state information reference signal of the target cell Send the data of this cell, and do not send any signal on the resource blocks with even indexes, including the data of this cell. Or, when the target cell...

Embodiment 2

[0057] When multiple resource elements are occupied in the physical resource block corresponding to each channel state information reference signal of the target cell, other cells in the coordinated measurement set only partly in the physical resource block corresponding to each channel state information reference signal of the target cell Data is sent on resource elements, and no signal is sent on other resource elements in this physical resource block.

[0058] Generally, the physical resource block corresponding to each channel state information reference signal of the target cell occupies 2 resource elements.

[0059] For example, when the time-frequency resource corresponding to each channel state information reference signal of the target cell contains two resource elements in each physical resource block, the channel state information reference signal of other cells in the coordinated measurement set in the target cell The data of the cell is sent on one resource elemen...

Embodiment 3

[0066] The implementation method in the third embodiment is the same as that in the second embodiment, but the mapping pattern of the channel state information reference signal of one resource block of the cell 1 is different.

[0067] Such as Figure 5a As shown, what is shown is the mapping pattern of the channel state information reference signal of 8 channels (that is, representing 8 antenna ports) of cell 1 in a resource block, and the channel state information reference signal resource of cell 1 includes resources filled with dots in the figure Elements R0 to R7, the frequency domain interval and time interval of the channel state information reference signal of the mapping pattern of each coordinated cell remain unchanged, and the specific position or the orthogonal sequence of the pilot may be different. When cell 1 sends CSI-RS on this resource block, other cells in the coordinated measurement set send the data of this cell on one resource element of each channel stat...

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Abstract

The invention provides a mapping method and system of cell resources in a cooperative measurement set during multipoint cooperative transmission. The mapping method comprises the following step: when a target cell in the cooperative measurement set sends a channel state information reference signal, other cells in the cooperative measurement set send data on a part of time-frequency resources which correspond to the channel state information reference signal of the target cell, wherein other cells refer to all cells except the target cell in the cooperative measurement set or a part of the cells except the target cell in the cooperative measurement set. The invention keeps the orthogonal design of CSI-RS (Channel State Information-Reference Signals) of different cells and can enhance the estimation quality of a mobile terminal on estimating the channel state information reference signals of cooperative cells, without sending the data on the resource elements of the channel state information reference signals of the cooperative cells and enhance the system throughput by sending the data on the resource element positions of the channel state information reference signals of the cooperative cells.

Description

technical field [0001] The present invention relates to a wireless communication system, in particular to a method and system for mapping cell resources in a cooperative measurement set in coordinated multi-point transmission. Background technique [0002] In order to improve the throughput of cells and coordinate interference between cells, new generation wireless communication systems such as Long-Term Evolution advance (LTE-Advance for short), International Mobile Telecommunication advance (IMT for short), etc. -Advance) and so on have introduced the Coordinate Multipoint Transmission and Reception (COMP for short) technology between network levels. [0003] In the 3rd Generation Partnership Project (3rd Generation Partnership Project, referred to as 3GPP) LTE56 conference, two pilot frequencies of the LTE-Advanced system have been defined, that is, Channel State Information-Reference Signals (CSI- RS) and demodulation reference signal (Demodulation Reference Signals, re...

Claims

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Application Information

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IPC IPC(8): H04W72/08H04W72/12
CPCH04W72/1257H04W72/535
Inventor 姜静李儒岳张文峰
Owner ZTE CORP
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