Method and device for multi-access-point calibration

A technology of multiple access points and calibration method, applied in the field of communication, can solve the problems of reduction, access point coherent transmission system performance, poor data parameters, etc., to achieve the effect of ensuring system performance

Inactive Publication Date: 2013-04-10
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention is proposed in view of the problem that the data jointly transmitted by different access points have different parameters, which leads to the failure of coherent transmission between the

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  • Method and device for multi-access-point calibration
  • Method and device for multi-access-point calibration

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0046] Preferred embodiment one

[0047] The first preferred embodiment describes the case where each RRU / access point does not perform antenna self-calibration.

[0048] (1) The serving cell configures the antenna port and phase feedback granularity of each RRU / access point measured by the UE, and sends a downlink reference signal on the corresponding antenna port.

[0049] The serving cell configures the UE to measure all antenna ports of each RRU / access point.

[0050] The frequency domain granularity of the phase feedback configured above may be RE (Resource Element), or RB (Resource Block), or subband (SubBand), or the entire cell system bandwidth, or other frequency domain units.

[0051] The aforementioned downlink reference signal may be a CSI-RS (Channel Status Information Reference Signal), and each RRU / access point is multiplexed and transmitted through frequency division, or code division, or time division, or a mixed manner of the first three methods.

[0052] (2) According ...

Example Embodiment

[0061] Preferred embodiment two

[0062] The second preferred embodiment describes a situation where each RRU / access point performs antenna self-calibration. It is a non-codebook-based embodiment.

[0063] (1) Each RRU / access point performs antenna self-calibration.

[0064] The above-mentioned self-calibration method can adopt an existing method based on a calibration network or a method based on a non-calibration network.

[0065] (2) The serving cell triggers a certain CoMP UE to perform auxiliary calibration, and configures the time and number of UE measurements, as well as the measured antenna ports of each RRU / access point and the granularity of phase feedback.

[0066] The above-mentioned triggering method may be that the serving cell is triggered once, and then the UE measures and feeds back at a subsequent configured measurement time.

[0067] It may also be that the serving cell is triggered once, and then the UE measures and feeds back at the subsequent N configured measureme...

Example Embodiment

[0092] Preferred embodiment three

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Abstract

The invention discloses a method and a device for multi-access-point calibration. The method comprises that a small zone receives a downlink channel parameter from unified equipment (UE) feedback; parameter difference of an uplink channel and a downlink channel is computed according to the downlink channel parameter; and multiple access points are calibrated according to the parameter difference. Good coherent sending between the access points can be guaranteed, and accordingly the performance of a system can be guaranteed.

Description

technical field [0001] The present invention relates to the communication field, in particular to a multi-access point calibration method and device. Background technique [0002] With the continuous improvement of people's requirements for future communication, more attention is paid to the spectrum efficiency of the cell edge. How to improve the transmission quality and throughput of the cell edge has become a subject of competing research. The coordinated multi-point (Coordinated Multi-Point, referred to as CoMP) technology utilizes the cooperative transmission and reception of the antennas of multiple access points. One or more access points are set up in one cell, and the multiple points of CoMP coordination can be from one cell The multiple access points may also be multiple access points from multiple cells, where the cells include the primary cell and the coordinated cell of the terminal. CoMP can effectively solve the interference problem at the edge of the cell, t...

Claims

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Application Information

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IPC IPC(8): H04W72/04
CPCH04B7/022H04B7/0456H04B7/0634
Inventor 赵亚军毕存磊李玉洁莫林梅秦洪峰史凡王茜孙云锋
Owner ZTE CORP
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