Method and device for forming multi-cell beam

Patent metadata

Field	Value
Publication number	US-10164690-B2
Application number	US-201415504962-A
Country	US
Kind code	B2
Filing date	Dec 17, 2014
Priority date	Aug 20, 2014
Publication date	Dec 25, 2018
Grant date	Dec 25, 2018

Abstract

The disclosure discloses a method and device for forming a multi-cell beam. The method includes: a beam forming vector bq of each coordination cell in a heterogeneous network is calculated according to a principle of maximizing a signal intensity of a coordination cell scheduling user and minimizing a weighted interference leakage of the coordination cell scheduling user to other coordination cell scheduling users; and the beam forming vector bq of corresponding coordination cell is updated according to a calculation result, to enable each coordination cell to transmit data to a corresponding scheduling user according to updated beam forming vector bq.

First claim

What is claimed is:

1. A method for forming a multi-cell beam, comprising:
calculating, according to a principle of maximizing a signal intensity of a coordination cell scheduling user and minimizing a weighted interference leakage ratio of the coordination cell scheduling user to other coordination cell scheduling users, a beam forming vector b q of each coordination cell in a heterogeneous network; and
updating the beam forming vector b q of a corresponding coordination cell according to a calculation result, to enable each coordination cell to transmit data to a corresponding scheduling user according to the updated beam forming vector b q ;
wherein as for each coordination cell, calculating the beam forming vector b q , comprising: collecting measurement data obtained, according to preset measuring configuration information, by each coordination cell scheduling user; obtaining, according to collected measurement data, signal intensity information comprising an unknown quantity b q of the coordination cell scheduling user, and weighted interference leakage ratio information of the coordination cell scheduling user to other coordination cell scheduling users; and adjusting a value of b q of the coordination cell so as to adjust the signal intensity of the coordination cell scheduling user and a value of the weighted interference leakage ratio of the coordination cell scheduling user to other coordination cell scheduling users, wherein the value of b q of the coordination cell is determined according to the principle of maximizing the signal intensity of the coordination cell scheduling user and minimizing the weighted interference leakage ratio of the coordination cell scheduling user to other coordination cell scheduling users.

2. The method as claimed in claim 1 , wherein the collected measurement data comprises: channels of all coordination cells to all scheduling users, a beam forming vector of each coordination cell, and power information of an interference signal received by each coordination cell scheduling user.

3. The method as claimed in claim 2 , wherein the collected beam forming vector of each coordination cell comprises:
as for the coordination cell, the collected beam forming vector is a variable to be solved; and
as for other coordination cells, when the beam forming vector of the corresponding coordination cell is updated, the collected beam forming vector is a vector value updated lately; otherwise, the collected beam forming vector is an initial value of the beam forming vector obtained, according to an inherent algorithm, by the corresponding coordination cell.

4. The method as claimed in claim 3 , wherein when a beam forming vector of a centralized heterogeneous network is calculated, the measurement data needed for calculating the beam forming vectors of corresponding coordination cells is pre-collected by the center node.

5. The method as claimed in claim 1 , wherein the beam forming vector is calculated by one of the following formulas:

b
q

=

max

b
q

⁢

b
q
H

⁢

E
q

⁢

b
q

b
q
H

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q

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Assignees

• Zte Corp
• Xian Zhongxing New Software Co Ltd

Inventors

• Wang Shaopeng
• Qin Hongfeng

Classifications

• H04W72/541

  using the level of interference · CPC title

• H04B7/0617

  for beam forming · CPC title

• H04L5/0073

  Allocation arrangements that take into account other cell interferences · CPC title

• H04B7/0634

  Antenna weights or vector/matrix coefficients · CPC title

• H04B7/024 Primary

  Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems · CPC title