公开(公告)号：US20220385352A1

公开(公告)日：2022-12-01

申请号：US17761736

申请日：2019-09-20

Applicant: Nokia Solutions and Networks Oy

Inventor： Shalini GULATI ,  Suresh KALYANASUNDARAM ,  Jinesh P. NAIR ,  Shuang TAN ,  Stefan WESEMANN

IPC: H04B7/08 ,  H04W28/06

Abstract: Embodiments of the present disclosure relate to compressed channel state information transfer. According to embodiments of the present disclosure, the radio unit at the base station receives signals from the terminal device. The radio unit (RU) compresses the signal based on the weights of beams and transmits the compressed signal to the baseband unit (BBU) at the base station. The baseband unit reconstructs the channel based on the compressed signal and the coefficients. In this way, the amount of information conveyed across the RU-BBU interface is reduced, and the accuracy of channel estimation is improved. Further, the sounding reference signal (SRS) channel can be obtained at the BBU with reduced number of SRS transmissions.

公开(公告)号：US20230284199A1

公开(公告)日：2023-09-07

申请号：US18118373

申请日：2023-03-07

Applicant: NOKIA SOLUTIONS AND NETWORKS OY

Inventor： Muhammad Ayyaz QURESHI ,  Martin STEIERT ,  Tilman FELGENTREFF ,  Suresh KALYANASUNDARAM ,  Jinesh P. NAIR ,  Shalini GULATI

IPC: H04W72/044 ,  H04W72/52

CPC classification number: H04W72/046 ,  H04W72/52 ,  H04W16/28

Abstract: A method comprises selecting a beam to be scheduled for a slot that is upcoming, and selecting a terminal device to be scheduled in the selected beam. Selection of the terminal device is based on the terminal device considering the selected beam as its best beam. Physical resource blocks are allocated to the terminal device, and a beam configuration to be used for the selected beam is chosen based in part on user traffic and load distribution. A switching event is triggered. The switching event comprises producing the chosen beam configuration by providing a beamforming command and using a control line controlling a switch network comprised in phase shifters to steer the beam. The phase shifters are comprised in a radio frequency front-end unit comprising a plurality of antenna columns. The phase shifters are placed in front of selected antenna sub-arrays comprised in the plurality of antenna columns.