US Patent No. 10,194,441

BANDWIDTH REDUCTION WITH BEAMFORMING AND DATA COMPRESSION


Patent No. 10,194,441
Issue Date January 29, 2019
Title Bandwidth Reduction With Beamforming And Data Compression
Inventorship Xiaoyong Yu, Grayslake, IL (US)
Ke-Kang Chin, Bartlett, IL (US)
Alan Rottinghaus, Barrington, IL (US)
Assignee Nokia Solutions and Networks Oy, Espoo (FI)

Claim of US Patent No. 10,194,441

1. A method comprising:for a given user equipment, selecting a subset of a plurality of beams based on received energies of the plurality of beams;
transmitting on a front haul link only data from the selected subset of beams; and
using the received energies of each beam of the subset of beams to compress the data prior to transmitting the compressed data on the front haul link, wherein using the received energies of each beam of the subset of beams comprises:
for each respective beam of the subset of beams, selecting from a set of pre-computed minimum gain offset values stored in a local memory, wherein each minimum gain offset value is stored with an associated energy value, one minimum gain offset value having an associated energy value that most closely corresponds with the received energy of the respective beam of the subset of beams;
compressing respective data associated with each respective beam of the subset of beams after dividing in-phase and quadrature portions of the respective data by the selected one minimum gain offset value that corresponds to the respective beam; and
sending indications of all of the selected one minimum gain offset values with the compressed data on the front haul link,
wherein the selecting of one minimum gain offset value is performed for each pair of physical resource blocks (PRBs) per beam of the subset of beams using received energy of the pair of PRBs.