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Double-codebook multipoint coordinated joint beamforming data transmission method and system

A technology of beamforming and multi-point coordination, applied in diversity/multi-antenna systems, space transmit diversity, electrical components, etc., can solve problems such as difficult to improve cell edge performance, and achieve performance improvement, low interference, and improved performance Effect

Active Publication Date: 2011-05-18
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the use of multi-antenna technology can increase the data rate in the center of the cell, it is difficult to improve the performance at the edge of the cell

Method used

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  • Double-codebook multipoint coordinated joint beamforming data transmission method and system
  • Double-codebook multipoint coordinated joint beamforming data transmission method and system
  • Double-codebook multipoint coordinated joint beamforming data transmission method and system

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Embodiment 1 corresponds to the situation that the number of beams for exchanging information between the user and the service area is one.

[0059] Based on the dual codebook information fed back by the user, the evolved Node B knows the number of beams that exchange information between the user and the service area it belongs to. Any combination of users among them is a user pair to be verified, and the missing signal-to-noise ratio of each user pair to be verified is calculated, and the user pair to be verified with the largest missing signal-to-noise ratio is taken as the confirmed user pair.

[0060] The user pair to be verified includes a first user and a second user, the service area to which the first user belongs is the first service area, and the service area to which the second user belongs is the second service area.

[0061] The method of calculating the missing signal-to-noise ratio of the user pair to be verified is as follows: calculate the ratio of the ...

Embodiment 2

[0069] Embodiment 2 corresponds to the situation that the number of beams for exchanging information between the user and the service area is two.

[0070] Based on the dual codebook information fed back by the user, the evolved Node B learns the number of beams that exchange information between the user and the service area it belongs to. Any combination of users is a user pair to be verified, and the missing signal-to-noise ratio of each user pair to be verified is calculated, and the user pair to be verified with the largest value of the missing signal-to-noise ratio is taken as the determined user pair;

[0071] The user pair to be verified includes a first user and a second user, the service area to which the first user belongs is the first service area, and the service area to which the second user belongs is the second service area;

[0072] The method to calculate the missing signal-to-noise ratio of the user pair to be verified is:

[0073] Calculate the service powe...

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Abstract

The invention discloses a double-codebook multipoint coordinated joint beamforming data transmission method and system. The method comprises the following step of: determining user pairs transmitting data to users in a coordination area by adopting a multipoint coordinated joint beamforming mode according to the service power of the users in the coordination area and the interference power to coordination users. According to the invention, better user pairs can be selected in the coordination area, and the performance of joint beamforming users can be improved. By adopting a maximum missing signal-to-noise ratio (SLR) concept and utilizing beam information represented by precoding, the ratio of the service power from cells participating in coordination to service users to the interference power of users is maximum, and therefore, the interference to the coordination users is relatively minimum while the performance of service users is ensured. When the method is used for carrying out intra-cell and MU-CoMP-CB of (Multi User-Coordinated Multi Point Transmission and Reception-Cell Broadcast) the inter-cell, the performance of each CB user can be ensured to be promoted.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a method and system for dual codebook multi-point cooperative joint beamforming data transmission. Background technique [0002] In the current Long Term Evolution-Advanced (LTE-A for short) system, the performance difference between the cell edge user and the center user is still a major problem. Although the use of multi-antenna technology can increase the data rate in the center of the cell, it is difficult to improve the performance at the edge of the cell. Therefore, the LTE-A system will improve cell edge performance as one of its main indicators. [0003] In order to increase the transmission rate at the edge of a cell, 3GPP introduces a Coordinated Multi Point Transmission and Reception (CoMP for short) technology, which mainly improves the data transmission rate of an edge user through inter-cell cooperation. CoMP mainly includes two manners ...

Claims

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Application Information

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IPC IPC(8): H04W72/12H04B7/06
Inventor 张峻峰魏宁张忠培李晓辉
Owner ZTE CORP