公开(公告)号：US11456748B2

公开(公告)日：2022-09-27

申请号：US17391544

申请日：2021-08-02

Applicant: CommScope Technologies LLC

Inventor： Stuart D. Sandberg

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

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：US11304213B2

公开(公告)日：2022-04-12

申请号：US16413360

申请日：2019-05-15

Applicant: CommScope Technologies LLC

Inventor： Balaji B Raghothaman ,  Stuart D. Sandberg ,  Purnima Venkata Kompella ,  Anil Bapat

IPC: H04W72/12 ,  H04W72/04 ,  H04W52/08 ,  H04L5/00 ,  H04W52/24 ,  H04B17/336 ,  H04W52/14

Abstract: This disclosure is directed to techniques for implementing uplink spatial reuse in a C-RAN.

公开(公告)号：US20210160802A1

公开(公告)日：2021-05-27

申请号：US17104985

申请日：2020-11-25

Applicant: CommScope Technologies LLC

Inventor： Stuart D. Sandberg ,  Irfaan Ahamed Salahuddeen

IPC: H04W56/00 ,  H04W74/08 ,  H04W72/04 ,  H04L27/38 ,  H04W88/08

Abstract: Techniques are described for avoiding contention between synchronization packets (for example, Institute of Electrical and Electronics Engineers (IEEE) 1588 Precision Time Protocol (PTP) synchronization packets) and in-phase and quadrature (IQ) packets communicated over a fronthaul network used in a radio access network (for example, a Fifth Generation (5G) radio access network).

公开(公告)号：US20200351806A1

公开(公告)日：2020-11-05

申请号：US16934852

申请日：2020-07-21

Applicant: CommScope Technologies LLC

Inventor： Vedat Eyuboglu ,  Stuart D. Sandberg

IPC: H04W56/00

Abstract: Among other things, a communication system comprising remote units, a reference timing source, a controller, a controller clock, and a remote unit clock. The remote units exchange radio frequency (RF) signals with mobile devices. The reference timing source is synchronized with a coordinated universal time (UTC) or a Global Positioning System (GPS). The controller clock is synchronized with the reference timing source and provides timing information to the controller. The remote unit clock is synchronized with the controller clock and provides timing information to a remote unit. The controller and the remote unit are configured to transmit time stamp messages to synchronize the controller clock and the remote unit clock, by avoiding contention between time stamp transmissions and baseband data transmissions or between time stamp transmissions of different remote units to the controller.

公开(公告)号：US20200092901A1

公开(公告)日：2020-03-19

申请号：US16692860

申请日：2019-11-22

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 in a cellular network comprises: a processing system comprising a controller and remote units, with the remote units being configured to communicate with the controller and to communicate with mobile devices within a communication cell of the cellular network. At least part of the processing system is configured to perform operations comprising: estimating signal strength experienced by all or some of the mobile devices; identifying, based at least on the signal strength, one or more of the mobile devices that can be scheduled for communication with one or more of the remote units in the communication cell on a same airlink resource; and scheduling the communication.

公开(公告)号：US12170973B2

公开(公告)日：2024-12-17

申请号：US17898938

申请日：2022-08-30

Applicant: CommScope Technologies LLC

Inventor： Vedat Eyuboglu ,  Stuart D. Sandberg

IPC: H04W56/00

Abstract: One embodiment is directed to a communication system comprising a remote unit comprising a remote unit local clock and a controller communicatively coupled to the remote unit using a switched Ethernet network. The remote unit is configured to synchronize the remote unit local clock to a reference timing source using timing messages communicated over the switched Ethernet network with the remote unit. The communication system is configured to transmit the timing messages and baseband data so as to reduce a level of contention encountered by the timing messages in connection with being communicated over the switched Ethernet network.

公开(公告)号：US20240314580A1

公开(公告)日：2024-09-19

申请号：US18607072

申请日：2024-03-15

Applicant: CommScope Technologies LLC

Inventor： Balaji B. Raghothaman ,  Irfaan Ahamed Salahuddeen ,  Stuart D. Sandberg ,  Ehsan Daeipour ,  Naveen Shanmugaraju

IPC: H04W16/28 ,  H04L5/00 ,  H04W24/10 ,  H04W56/00

CPC classification number: H04W16/28 ,  H04L5/0051 ,  H04W24/10 ,  H04W56/0015

Abstract: Systems and methods for consolidated two-level beam management for a base station that includes BBU(s) and a RU communicatively coupled to the BBU(s) are provided. In one example, a method includes receiving signal measurements for coarse beams from a UE; establishing a coarse beam association for the UE with a first coarse beam based on the signal measurements for the coarse beams from the UE; configuring the UE to measure reference signals associated with fine beams associated with the first coarse beam; receiving reference signal measurements for the fine beams from the UE; establishing a fine beam association for the UE with a first fine beam based on the reference signal measurements for the fine beams from the UE; transmitting synchronization signals to the UE using the first coarse beam; and transmitting data signals to UE using the first fine beam.

公开(公告)号：US20230262748A1

公开(公告)日：2023-08-17

申请号：US18309139

申请日：2023-04-28

Applicant: CommScope Technologies LLC

Inventor： Balaji B Raghothaman ,  Stuart D. Sandberg ,  Purnima Venkata Kompella ,  Anil Bapat

IPC: H04W72/542 ,  H04W76/10 ,  H04L5/00 ,  H04W74/08

CPC classification number: H04W72/542 ,  H04W76/10 ,  H04L5/0048 ,  H04W74/0833 ,  H04L5/0091 ,  H04L5/0058 ,  H04L5/0053 ,  H04W88/085

Abstract: One embodiment is directed to a system to provide wireless service comprising a base band unit and a plurality of antennas communicatively coupled to the base band unit. The system is configured for frequency reuse implemented via the plurality of antennas in order to transmit to subsets of the UEs. The UEs included in each subset are transmitted respectively different data using the same resource elements. The system is configured to collect base station data including Channel Quality Information (CQI) data, Sounding Reference Signal (SRS) data, and hybrid automatic repeat request (HARQ) acknowledgement/negative acknowledgement (ACK/NACK) data for the plurality of UEs. The system is configured to use the base station data to determine candidate UEs for transmission to using frequency reuse and to determine modulation and coding schemes (MCSs) for the UEs transmitted to using frequency reuse.

公开(公告)号：US11627497B2

公开(公告)日：2023-04-11

申请号：US16559228

申请日：2019-09-03

Applicant: CommScope Technologies LLC

Inventor： Stuart D. Sandberg

IPC: H04W28/22 ,  H04B1/66 ,  H04W28/10 ,  H04W28/02 ,  H04W72/04 ,  H04W28/08 ,  H04L1/00

Abstract: One embodiment is directed to a method of using variable-resolution quantization to front-haul at least some data over a front-haul network in a system configured to provide wireless service to user equipment. The method comprises, for each symbol position, determining a respective number of required resource blocks having respective actual user-equipment (UE) signal data to front-haul for each carrier and determining the number of high-resolution resource blocks that can be quantized at a higher resolution as a function of a difference between a nominal per-symbol-position front-haul link capacity and a link capacity needed to front-haul the required resource blocks for all of the carriers if quantized using a lower resolution. The method further comprises, for each symbol position, allocating the high-resolution resource blocks to each carrier and determining, for each carrier, which of the required resource blocks to quantize at the higher resolution. Other embodiments are disclosed.

公开(公告)号：US11284384B2

公开(公告)日：2022-03-22

申请号：US16879388

申请日：2020-05-20

Applicant: CommScope Technologies LLC

Inventor： Stuart D. Sandberg ,  Ehsan Daeipour ,  Nandish Chalishazar

IPC: H04W72/04 ,  H04W76/28

Abstract: One embodiment is directed wirelessly communicating with user equipment (UE) operating using discontinuous reception (DRX). When a rank for the UE has changed is determined and, in response when that happens, if an ON duration for a current DRX cycle for the UE will elapse during a current subframe is determined. In response to making such determination about the ON duration, a dummy assignment of resource blocks on a downlink shared channel is sent to the UE. The UE extends the ON duration of the current DRX cycle in response to the dummy assignment. If a channel quality indication (CQI) report has been made by the UE is determined and, in response thereto, a modulation and coding scheme (MCS) used for communicating with the UE is updated based on the reported rank and reported CQI. The dummy assignment is not made for communicating actual data to the UE.