公开(公告)号：US12244531B2

公开(公告)日：2025-03-04

申请号：US17938748

申请日：2022-10-07

Applicant: CommScope Technologies LLC

Inventor： Stuart D. Sandberg ,  Irfaan Ahamed Salahuddeen ,  Ehsan Daeipour

IPC: H04W16/02 ,  H04L5/00 ,  H04L25/02

Abstract: Orthogonal DMRS ports with resource block reuse in a single cell is provided. ABS comprises: a BBE and RUs. The BS transmits user data to each of a plurality of UEs on a PDSCH using a PRB allocation for the cell. The PRB and cell are the same for all UEs. The PRB comprises DMRS symbols. The BS transmits user data to each UE on the PDSCH using a respective non-intersecting subset of the RUs. No RU transmits user data on the PDSCH using the PRB to more than one UE. The BBE: determines non-intersecting sets of DMRS ports; assigns one set to each UE; and causes the BS to transmit UE-specific DMRS to UE on the DMRS ports in the set assigned to that UE using only a respective non-intersecting subset of RUs used for transmitting user data to that UE on the PDSCH using the PRB.

公开(公告)号：US20240284442A1

公开(公告)日：2024-08-22

申请号：US18628517

申请日：2024-04-05

Applicant: CommScope Technologies LLC

Inventor： Arthur J. Barabell ,  Vedat Eyuboglu ,  Nagi Jayaraman Mahalingam ,  Balaji B. Raghothaman ,  Stuart D. Sandberg ,  Sassan Ahmadi

IPC: H04W72/1263 ,  H04B17/318 ,  H04W72/044

CPC classification number: H04W72/1263 ,  H04B17/318 ,  H04W72/046

Abstract: An example communication system includes remote units to exchange radio frequency (RF) signals with mobile devices, RF signals comprising information destined for, or originating from, a mobile device, the remote units performing at least some physical layer processing for an air interface used by the remote units to communicate with the mobile device. The communication system also includes two or more controllers comprising real-time schedulers for assigning airlink resources to the mobile device for the information. The communication system also includes a coordination function coupled to the two or more controllers to coordinate assignments made by the real-time schedulers in the two or more controllers.

公开(公告)号：US11974269B2

公开(公告)日：2024-04-30

申请号：US17345219

申请日：2021-06-11

Applicant: CommScope Technologies LLC

Inventor： Arthur J. Barabell ,  Vedat Eyuboglu ,  Nagi Jayaraman Mahalingam ,  Balaji B Raghothaman ,  Stuart D. Sandberg ,  Sassan Ahmadi

IPC: H04W72/1263 ,  H04B17/318 ,  H04W72/044

CPC classification number: H04W72/1263 ,  H04B17/318 ,  H04W72/046

Abstract: An example communication system includes remote units to exchange radio frequency (RF) signals with mobile devices, RF signals comprising information destined for, or originating from, a mobile device, the remote units performing at least some physical layer processing for an air interface used by the remote units to communicate with the mobile device. The communication system also includes two or more controllers comprising real-time schedulers for assigning airlink resources to the mobile device for the information. The communication system also includes a coordination function coupled to the two or more controllers to coordinate assignments made by the real-time schedulers in the two or more controllers.

公开(公告)号：US20230389015A1

公开(公告)日：2023-11-30

申请号：US18323888

申请日：2023-05-25

Applicant: CommScope Technologies LLC

Inventor： Stuart D. Sandberg

IPC: H04W72/1268 ,  H04W74/08 ,  H04W72/543

CPC classification number: H04W72/1268 ,  H04W74/0833 ,  H04W72/543

Abstract: A communication system that uses dual base station frame boundaries is provided. A base station is in communication with a core network of at least one service provider and user equipment. The base station includes a circuitry that is configured to set a UL physical uplink shared channel (PUSCH) time frame boundary in alignment with a downlink (DL) PDSCH time frame boundary, process PUSCH communication signals in the PUSCH using the UL PUSCH time frame boundary, set an UL random access channel (RACH) time frame boundary at a select delay from an associated RACH time frame boundary within a UL PUSCH time frame, process RACH communication signals using the delayed UL RACH time frame boundary, and provide a timing advance command to a UE that communicated a UL RACH communication signal that accounts for a round trip latency in a fronthaul network connecting the base station and radio units.

公开(公告)号：US20220038103A1

公开(公告)日：2022-02-03

申请号：US17391544

申请日：2021-08-02

Applicant: CommScope Technologies LLC

Inventor： Stuart D. Sandberg

IPC: H03L7/06 ,  H04L7/033 ,  H04J3/06 ,  H03M1/06

Abstract: In one embodiment, a local clock is synchronized to a master clock using a Kalman filter to determine state variables using a state transition matrix that includes at least one coefficient that is associated with a digital-to-analog converter (DAC), where the state variables include a unit step variable indicative of a unit step for the system. The local clock is controlled based on the state variables determined using the Kalman filter. The unit step is indicative of an amount by which the frequency of the local clock signal changes in response to a change in the digital input of the DAC.

公开(公告)号：US20210314975A1

公开(公告)日：2021-10-07

申请号：US17345219

申请日：2021-06-11

Applicant: CommScope Technologies LLC

Inventor： Arthur J. Barabell ,  Vedat Eyuboglu ,  Nagi Jayaraman Mahalingam ,  Balaji B Raghothaman ,  Stuart D. Sandberg ,  Sassan Ahmadi

IPC: H04W72/12 ,  H04W72/04 ,  H04B17/318

Abstract: An example communication system includes remote units to exchange radio frequency (RF) signals with mobile devices, RF signals comprising information destined for, or originating from, a mobile device, the remote units performing at least some physical layer processing for an air interface used by the remote units to communicate with the mobile device. The communication system also includes two or more controllers comprising real-time schedulers for assigning airlink resources to the mobile device for the information. The communication system also includes a coordination function coupled to the two or more controllers to coordinate assignments made by the real-time schedulers in the two or more controllers.

公开(公告)号：US20210266123A1

公开(公告)日：2021-08-26

申请号：US17156323

申请日：2021-01-22

Applicant: CommScope Technologies LLC

Inventor： Boaz Pianka ,  Stuart D. Sandberg

IPC: H04L5/00 ,  H04L1/16 ,  H04W48/10 ,  H04W72/12

Abstract: A communication system for statically allocating physical uplink control channel (PUCCH) resources on a PUCCH. The communication system includes a base station configured to exchange radio frequency (RF) signals with a plurality of user equipment terminals (UEs). The base station is also configured to identify two PUCCH resources, each sharing the same orthogonal code sequence and located in different resource block of adjacent slots of a subframe. The base station is also configured to statically allocate the two PUCCH resources to two of the UEs, where both UEs are legacy UEs or Category-M1 (Cat-M1) UEs.

公开(公告)号：US20200077355A1

公开(公告)日：2020-03-05

申请号：US16553924

申请日：2019-08-28

Applicant: CommScope Technologies LLC

Inventor： Stuart D. Sandberg

IPC: H04W56/00

Abstract: Embodiment are directed to systems and methods for use with a central radio access network (C-RAN) comprising a plurality of controllers and a plurality of radio points. Each of the controllers is configured to determine if that controller should serve as a timing master for the controllers and the radio points and, if that controller should serve as the timing master, synchronize the local clock of that controller with a master clock source over a backhaul network and transmit synchronization messages from that controller over a fronthaul network for reception by the other controllers and the radio points and for use by the other controllers and the radio points in synchronizing the local clocks thereof with the local clock of that controller. Other embodiments are disclosed.

公开(公告)号：US20240380468A1

公开(公告)日：2024-11-14

申请号：US18692715

申请日：2022-09-15

Applicant: CommScope Technologies LLC

Inventor： Arthur J. Barabell ,  Ehsan Daeipour ,  Stuart D. Sandberg ,  Balaji B Raghothaman

IPC: H04B7/06 ,  H04B7/0426 ,  H04B7/0456 ,  H04B7/0495 ,  H04B7/08 ,  H04L5/00 ,  H04W72/1273 ,  H04W74/0833

Abstract: Systems and methods for flexible antenna configurations and beamforming are provided. In one example, a system includes: at least one controller configured to implement at least some functions for one or more layers of a wireless interface used to communicate with UEs; remote unit(s) communicatively coupled to the at least one controller; and antenna elements communicatively coupled to the remote unit(s), each respective antenna element oriented in a respective direction different than other antenna elements. The at least one controller is configured to: determine a location of a UE in a cell of the system and/or channels between the antenna elements and the UE; select antenna element(s) for use in transmitting downlink signals to the UE based on the location of the UE and/or the channels between the antenna elements and the UE; and transmit downlink signals to the UE via the selected antenna element(s) in a first time period.

公开(公告)号：US11901995B2

公开(公告)日：2024-02-13

申请号：US17743910

申请日：2022-05-13

Applicant: CommScope Technologies LLC

Inventor： Balaji B Raghothaman ,  Stuart D. Sandberg

IPC: H04B7/02 ,  H04B7/06 ,  H04B7/0456

CPC classification number: H04B7/0639 ,  H04B7/0456 ,  H04B7/0626

Abstract: One embodiment is directed to determining a composite precoder for transmitting to a UE using a group of one or more of the radio units by doing the following: for each of a plurality of subsets of the radio units, transmitting separate reference signals from the different antennas of only the radio units included in that subset; receiving subset-specific preferred precoder index reports from the UE for at least each individual radio unit included in the group of one or more of the radio units; determining the composite precoder for the UE using the subset-specific preferred precoder index reports from the UE for at least the one or more radio units included in the group; and using the composite precoder for transmitting to the UE using the one or more radio units included in the group. In some embodiments, each of the subsets includes less than all of the radio units.