公开(公告)号：US20250062807A1

公开(公告)日：2025-02-20

申请号：US18802443

申请日：2024-08-13

Applicant: Nokia Solutions and Networks Oy

Inventor： Bala Venkata Ramulu GORANTLA ,  Suresh KALYANASUNDARAM ,  Shalini GULATI

IPC: H04B7/06 ,  H04L5/00 ,  H04W24/10

Abstract: An apparatus for a communication system, the apparatus comprising at least one processor, and at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus to: determine a first measurement of first reference signals associated with a first analog beam used to receive the first reference signals, determine a second measurement of second reference signals associated with a second analog beam used to receive the second reference signals, determine first information characterizing a digital beamformer based on the first measurement and the second measurement.

公开(公告)号：US20240204838A1

公开(公告)日：2024-06-20

申请号：US18515666

申请日：2023-11-21

Applicant: NOKIA SOLUTIONS AND NETWORKS OY

Inventor： Muhammad Ayyaz QURESHI ,  Tilman FELGENTREFF ,  Martin STEIERT ,  Suresh KALYANASUNDARAM ,  Shalini GULATI

IPC: H04B7/06 ,  H04B7/0408 ,  H04B7/08

CPC classification number: H04B7/0617 ,  H04B7/0408 ,  H04B7/0877

Abstract: A method and apparatus determine a transmission beam for downlink transmissions, and provides first beamforming instructions for forming the transmission beam to a transmission path. The method and apparatus also determine at least one receiving beam that is a first receiving beam, and at least one receiving beam that is a second receiving beam. A first antenna sub-array is configured to provide a first plurality of concurrent receiving beams and a second antenna sub-array is configured to provide a second plurality of concurrent receiving beams, providing second beamforming instructions, for forming at least the first receiving beam and at least the second receiving beams, to a first receiving path and a second receiving path, respectively.

公开(公告)号：US20250088235A1

公开(公告)日：2025-03-13

申请号：US18825802

申请日：2024-09-05

Applicant: NOKIA SOLUTIONS AND NETWORKS OY

Inventor： Lorenzo MAGGI ,  Bala Venkata Ramulu GORANTLA ,  Suresh KALYANASUNDARAM ,  Shalini GULATI

IPC: H04B7/06

Abstract: Apparatuses, methods, and computer-readable media for joint user scheduling and analog beam choice in hybrid beamforming are disclosed. The apparatus comprises a processor and a memory storing instructions that, when executed by the processor, cause the apparatus at least to perform computing a maximum number of physical resource blocks, PRBs, that can be assigned to a specific user using a specific beam out of a plurality of users and a plurality of beams The apparatus can also calculate a maximum value of a first beam proportional fair, PF, metric and the corresponding beam and users The apparatus can also calculate a maximum value of a second beam proportional fair, PF, metric and the corresponding beam and users The apparatus can also select one of the RT-heuristic or Pmax-heuristic, and perform beam and user scheduling based on information regarding the corresponding beam and users according to the selected RT-heuristic or Pmax-heuristic.

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.

公开(公告)号：US20230262613A1

公开(公告)日：2023-08-17

申请号：US18108285

申请日：2023-02-10

Applicant: NOKIA SOLUTIONS AND NETWORKS OY

Inventor： Suresh KALYANASUNDARAM ,  Saikat SAHA ,  Shalini GULATI

IPC: H04W52/36 ,  H04L47/62 ,  H04L1/00

CPC classification number: H04W52/365 ,  H04L47/6225 ,  H04L1/0003 ,  H04L1/0009

Abstract: According to an aspect, there is provided an apparatus for performing the following. The apparatus is configured to, first, allocate one or more of a plurality of available physical resource blocks to a plurality of terminal devices, wherein the allocating is performed so that a power spectral density for the plurality of terminal devices matches or exceeds a pre-defined limit or a plurality of respective pre-defined limits for power spectral density. In response to one or more physical resource blocks being still available following said allocating, the apparatus is configured to further allocate at least one of the one or more physical resource blocks still available to at least one of the plurality of terminal devices, wherein the further allocating is performed so that at least a pre-defined value for a modulation and coding scheme index is sustainable for said at least one of the plurality of terminal devices.

公开(公告)号：US20230067024A1

公开(公告)日：2023-03-02

申请号：US17798753

申请日：2020-02-12

Applicant: NOKIA SOLUTIONS AND NETWORKS OY

Inventor： Shalini GULATI ,  Rajeev AGRAWAL ,  Suresh KALYANASUNDARAM ,  Richa GUPTA ,  Jinesh P NAIR

IPC: H04L5/00 ,  H04W24/08

Abstract: An apparatus, method and computer program is described above: determining a coupling gain for a user device within a cell of a mobile communication system; comparing the determined coupling gain with a coupling gain threshold; setting the user device to operate in a device-specific CSI-RS mode of operation in the event that the determined coupling gain is less than the coupling gain threshold, wherein, in the device-specific CSI-RS mode of operation, the user device is configured to use device-specific reference signal transmissions for the determination of channel state information; and setting the user device to operate in a cell-specific CSI-RS mode of operation in the event that the determined coupling gain is not less than the coupling gain threshold, wherein, in the cell-specific CSI-RS mode of operation, the user device is configured to use cell-specific reference signal transmissions for the determination of channel state information.