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A csi-rs port mapping method and device

A technology of port mapping and port, which is applied in the field of CSI-RS port mapping method and device, and can solve problems such as increasing the complexity of system design

Active Publication Date: 2018-12-18
WUHAN HONGXIN TELECOMM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing technical solution, if there are multiple cells in the CoMP set, the serving cell needs to implement a non-zero-power CSI-RS mapping and multiple zero-power CSI-RS mappings for different CSI-RS configurations , increasing the complexity of the system design

Method used

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  • A csi-rs port mapping method and device
  • A csi-rs port mapping method and device
  • A csi-rs port mapping method and device

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0041] see figure 1 It shows a schematic flowchart of a CSI-RS port mapping method in the present invention. The method described in this embodiment is specifically applied to a cell supporting eight-antenna and two-port transmission, including:

[0042] S101: According to the number of cells in the CoMP set, divide each cell into group.

[0043] Where N represents the number of cells in the CoMP set, Indicates rounding up. It can be understood that when the number of cells is greater than or equal to 1 and less than or equal to 4, all the cells are divided into the same group, and when the number of cells is greater than 4 and less than or equal to 8, the cells are divided into two cells.

[0044] S102: Adopting the same eight-port CSI-RS configuration for each cell in the same group, and adopting a different eight-port CSI-RS configuration for each cell in a different group.

[0045]The CSI-RS can support a maximum of 8 logical ports, and in this embodiment, the CSI-R...

Embodiment 2

[0053] see figure 2 A schematic flowchart of a CSI-RS mapping method disclosed in another embodiment of the present invention is shown. Compared with Embodiment 1, the method disclosed in this embodiment is also applicable to a cell with eight antennas and two ports for transmission. The difference is that the CSI-RS configuration in this embodiment adopts 4-port CSI configuration.

[0054] The specific process is as follows:

[0055] S201: According to the number of cells in the CoMP set, divide each cell into groups, where N represents the number of cells in the CoMP set, Indicates rounding up;

[0056] S202: adopting the same four-port CSI-RS configuration for each cell in the same group, and adopting a different four-port CSI-RS configuration for each cell in a different group;

[0057] S203: Map the CSI-RS of each cell in each group to different port combinations of the four-port CSI-RS group, where the port combination is a 2-port port combination.

Embodiment 3

[0059] Optionally, the realization principle of the foregoing method may also be applied to a cell supporting eight-antenna and four-port transmission. see image 3 A schematic flowchart of a CSI-RS mapping method disclosed in another embodiment of the present invention.

[0060] S301: According to the number of cells in the CoMP set, divide each cell into groups, where N represents the number of cells in the CoMP set, Indicates rounding up.

[0061] S302: Adopting the same eight-port CSI-RS configuration for each cell in the same group, and adopting a different eight-port CSI-RS configuration for each cell in a different group.

[0062] S303: Map the CSI-RS of each cell in each group to different port combinations of the eight-port CSI-RS group, where the port combination is a 4-port port combination.

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Abstract

The invention provides a CSI-RS port mapping method and device. The method comprises the steps of: dividing each cell into different groups according to the number of cells in a CoPM set; adopting the identical CSI-RS configuration for all the cells in the same group, and adopting different CSI-RS configurations for the cells in different groups; and furthermore, mapping the CSI-RS of each cell in the same group to different port combinations of CSI-RS ports in the group. According to the invention, on the premise that the cells in the same group do not influence each other, the categories of the CSI-RS configurations are reduced, so that the zero power CSI-RS mapping times of the CoMP set are reduced.

Description

technical field [0001] The present application relates to the communication field, and more specifically, relates to a CSI-RS port mapping method and device. Background technique [0002] In the LTE (Long-Term Evolutio, long-term evolution) system, in the multi-cell CoMP (Coordinated Multiple Point, coordinated multi-point) mode, the CSI-RS pilot of each serving cell and the PDSCH of other coordinated cells will overlap on the same time frequency position. This will cause great interference to the accurate estimation of channel information, so this interference must be suppressed. [0003] In order to avoid the above-mentioned interference, in the existing technical solution, different CSI-RS configurations are used in the cells of the same CoPM set, and the Muting (muting) technology is used for the CSI-RS between CoMP cells, so that the coordination of the coordinated cells can be reduced. Interference of PDSCH to CSI-RS pilot. [0004] From the LTE physical layer proto...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L5/00H04L1/18H04B7/06
CPCH04B7/0626H04L1/1893H04L5/0048H04L5/0062
Inventor 邹丽红陈印锋
Owner WUHAN HONGXIN TELECOMM TECH CO LTD
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