US Patent No. 9,780,858

METHOD AND APPARATUS FOR DETERMINING THREE-DIMENSIONAL BEAM PRE-CODING INFORMATION


Patent No. 9,780,858
Issue Date October 03, 2017
Title Method And Apparatus For Determining Three-dimensional Beam Pre-coding Information
Inventorship Hui Li, Beijing (CN)
Assignee China Academy of Telecommunications Technology, Beijing (CN)

Claim of US Patent No. 9,780,858

1. A method for determining three-dimension beam pre-coding information, the method comprising:
performing, by a network device, beam-forming on pilot resources using vectors in a set of first beam-forming vectors respectively,
and then transmitting a pilot, determining an optimum first beam-forming vector in the set of first beam-forming vectors according
to a first measurement result on the pilot, and determining a set of second beam-forming vectors corresponding to the optimum
first beam-forming vector, wherein there is a set of second beam-forming vectors corresponding to each first beam-forming
vector, each first beam-forming vector is obtained as a result of bit quantization on a first-dimension space of the network
device, and each second beam-forming vector is obtained as a result of bit quantization on a first-dimension space of a corresponding
first beam-forming vector;

performing, by the network device, beam-forming on the pilot resources using vectors in the determined set of second beam-forming
vectors respectively, and then transmitting a pilot, and determining an optimum second beam-forming vector in the set of second
beam-forming vectors, and optimum pre-coding information in a second dimension according to a second measurement result on
the pilot; and

integrating, by the network device, the optimum second beam-forming vector, and the optimum pre-coding information in the
second dimension into three-dimension beam pre-coding information.