公开(公告)号：US11490404B2

公开(公告)日：2022-11-01

申请号：US16549022

申请日：2019-08-23

Applicant: AT&T Intellectual Property I, L.P.

Inventor： Ralf Bendlin ,  SaiRamesh Nammi ,  Arunabha Ghosh ,  Xiaoyi Wang

IPC: H04W72/12 ,  H04L5/00 ,  H04L1/00 ,  H04W16/14

Abstract: The disclosed subject matter is directed towards semi-static or dynamic shifting of New Radio demodulation reference signals to avoid collisions with LTE cell specific reference signals (LTE CRS) in a physical downlink shared channel symbol (PDSCH). In dynamic spread spectrum (DSS) deployments, where NR PDSCH mapping type B is used, e.g., to allow for two NR physical downlink control channel symbols, when the NR PDSCH starts on a symbol carrying LTE CRS, the NR DMRS of the NR PDSCH is shifted to the first symbol of the NR PDSCH not carrying LTE CRS. Whether mapping type A or mapping type B, shifting the symbol containing NR DMRS facilitates the use of two DMRS symbols without colliding with LTE CRS.

公开(公告)号：US11483190B2

公开(公告)日：2022-10-25

申请号：US17390414

申请日：2021-07-30

Applicant: AT&T Intellectual Property I, L.P. ,  University of Notre Dame du Lac

Inventor： Ralf Bendlin ,  Aditya Chopra ,  Bertrand Martyn Hochwald ,  Nicholas Joseph Estes ,  Jonathan David Chisum ,  Kang Gao

IPC: H04L27/22 ,  H04B7/0413

Abstract: Aspects of the subject disclosure may include, a non-linear energy detector that obtains baseband information from a mixed signal that corresponds to an information component of a received radio frequency (RF) signal, wherein the mixed signal comprises a local oscillator signal combined, without multiplication, with the received RF signal, wherein the received RF signal comprises a carrier wave component operating at a carrier frequency within a millimeter wave spectrum, wherein the non-linear energy detector is associated with a non-linear current-voltage (I-V) characteristic curve, and wherein the baseband information is obtained by applying the mixed signal to the non-linear I-V characteristic curve. Other embodiments are disclosed.

公开(公告)号：US20220132521A1

公开(公告)日：2022-04-28

申请号：US17573005

申请日：2022-01-11

Applicant: AT&T Intellectual Property I, L.P.

Inventor： Xiaoyi Wang ,  Ralf Bendlin ,  Thomas Novlan ,  Milap Majmundar ,  Arunabha Ghosh

IPC: H04W72/12 ,  H04L5/00 ,  H04W72/04

Abstract: Facilitating a time-division multiplexing pattern-based solution for a dual-subscriber identity module with a single radio in advanced networks (e.g., 5G, 6G, and beyond) is provided herein. Operations of a method can comprise obtaining, by a network device comprising a processor, multiple time-division multiplexing patterns applicable to a mobile device. The multiple time-division multiplexing patterns indicate respective repeating patterns of an on state and an off state of a defined identity of the mobile device. The method also can comprise facilitating, by the network device, a transmission, to the mobile device, of information indicative of the multiple time-division multiplexing patterns. In an example, the mobile device can be configured to operate with at least two subscriber identity modules.

公开(公告)号：US20220123846A1

公开(公告)日：2022-04-21

申请号：US17566657

申请日：2021-12-30

Applicant: AT&T INTELLECTUAL PROPERTY I, L.P.

Inventor： Aditya Chopra ,  Saeed Ghassemzadeh ,  Arunabha Ghosh ,  Ralf Bendlin ,  Salam Akoum ,  SaiRamesh Nammi ,  Thomas Novlan ,  Xiaoyi Wang

IPC: H04B17/309 ,  H04B17/318 ,  H04B17/391

Abstract: An example method may include a processing system of a channel sounding receiver having a processor receiving from a base station, at a location, a channel sounding waveform via a plurality of carriers, sampling the channel sounding waveform via the plurality of carriers to generate a plurality of per-carrier time domain sample sets, and processing the plurality of per-carrier time domain sample sets via a plurality of discrete Fourier transform modules to provide a plurality of per-carrier frequency domain sample sets. The method may further include the processing system aligning the plurality of per-carrier frequency domain sample sets in gain and phase to provide a combined frequency domain sample set and measuring a channel property at the location based upon the combined frequency domain sample set.

公开(公告)号：US11258485B2

公开(公告)日：2022-02-22

申请号：US16813824

申请日：2020-03-10

Applicant: AT&T INTELLECTUAL PROPERTY I, L.P.

Inventor： Xiaoyi Wang ,  Thomas Novlan ,  Salam Akoum ,  Ralf Bendlin ,  Milap Majmundar ,  Andrew Thornburg ,  Arunabha Ghosh

IPC: H04B7/0452 ,  H04B7/14 ,  H04L5/00 ,  H04L12/66 ,  H04W72/04

Abstract: Various embodiments disclosed herein provide for an enhanced timing advance scheme to support MU-MIMO in an integrated access and backhaul system. The timing advance scheme disclosed herein aligns the arrival time between backhaul links and access links to enable MU-MIMO gain at the receiver side. In the integrated access and backhaul system, which comprises distributed nodes, the timing advance offset for an access link transmission (a transmission to a node further away in hops from the core network, or to a user equipment device) can be modified by offsetting it with the timing advance of the backhaul link (e.g., from a parent node). This enables the arrival time for transmissions, both access link transmissions from the UE or child node, and backhaul link transmissions from a parent node to arrive at the same time.

公开(公告)号：US11239877B1

公开(公告)日：2022-02-01

申请号：US17102666

申请日：2020-11-24

Applicant: AT&T Intellectual Property I, L.P. ,  University of Notre Dame du Lac

Inventor： Aditya Chopra ,  Ralf Bendlin ,  Nicholas Joseph Estes ,  Kang Gao ,  Bertrand Martyn Hochwald ,  Jonathan David Chisum

IPC: H04L5/12 ,  H04L23/02 ,  H04B1/50 ,  H04B1/00

Abstract: Aspects of the subject disclosure may include, for example, generating multiple digital reference pulses synchronously to a master oscillator, selectively switching the multiple digital reference pulses, and providing the switched pulses to multiple radio modules operating within a millimeter wave spectrum. For each radio module, counting cycles of an adjustable LO output signal occurring between consecutive pulses of the switched digital reference pulses, determining a difference between the count value and a reference value, and adjusting the adjustable LO according to the difference. A resulting corrected LO signal is synchronized to the master oscillator. Other embodiments are disclosed.

公开(公告)号：US11228381B2

公开(公告)日：2022-01-18

申请号：US16773581

申请日：2020-01-27

Applicant: AT&T Intellectual Property I, L.P.

Inventor： Aditya Chopra ,  Saeed Ghassemzadeh ,  Arunabha Ghosh ,  Ralf Bendlin ,  Salam Akoum ,  SaiRamesh Nammi ,  Thomas Novlan ,  Xiaoyi Wang

IPC: H04L12/26 ,  H04B17/309 ,  H04B17/318 ,  H04B17/391

Abstract: An example method may include a processing system of a channel sounding receiver having a processor receiving from a base station, at a location, a channel sounding waveform via a plurality of carriers, sampling the channel sounding waveform via the plurality of carriers to generate a plurality of per-carrier time domain sample sets, and processing the plurality of per-carrier time domain sample sets via a plurality of discrete Fourier transform modules to provide a plurality of per-carrier frequency domain sample sets. The method may further include the processing system aligning the plurality of per-carrier frequency domain sample sets in gain and phase to provide a combined frequency domain sample set and measuring a channel property at the location based upon the combined frequency domain sample set.

公开(公告)号：US11197314B2

公开(公告)日：2021-12-07

申请号：US16775783

申请日：2020-01-29

Applicant: AT&T Intellectual Property I, L.P.

Inventor： Salam Akoum ,  Ralf Bendlin ,  Xiaoyi Wang ,  Arunabha Ghosh

IPC: H04W72/04 ,  H04W74/00 ,  H04L5/00 ,  H04W72/08 ,  H04W4/70 ,  H04B7/0413

Abstract: The described technology is generally directed towards wireless communications systems in which multiple control channel resource sets (CORESETs) are configured into a CORESET group. The CORESET group may be associated with a usage scenario/quality of service requirement, and used by user equipment to decode downlink control information corresponding to that usage scenario. For example, one CORESET group can be used for URLLC traffic, another for eMBB type traffic and another for mMTC traffic. Different CORESET groups may be used to provide different aggregation level sets, different DMRS pattern configurations, different search spaces, different transmission protocols/schemes, different beam management and recovery procedures, different radio link monitoring and radio link failure procedures, and so on. Different CORESET groups may be associated with different transmission points.

公开(公告)号：US11177922B2

公开(公告)日：2021-11-16

申请号：US16665167

申请日：2019-10-28

Applicant: AT&T INTELLECTUAL PROPERTY I, L.P.

Inventor： Ralf Bendlin ,  Thomas Novlan ,  Xiaoyi Wang ,  Arunabha Ghosh

IPC: H04W4/00 ,  H04L5/00 ,  H04B7/06 ,  H04L27/26 ,  H04B7/04 ,  H04W72/04

Abstract: Various embodiments disclosed herein provide for efficient configuration of demodulation reference signals in beamformed wireless communications systems. In an embodiment, the transmitter can signal the location of demodulation reference signals (DMRS) by including an indicator bit in downlink control information indicating which DMRS scheme is used in the transmission. A first DMRS scheme can let the user equipment (UE) device know that the DMRS position for the PDSCH carrying the RMSI is as signaled on the master information block (MIB)—referred to as PDSCH Mapping Type A. A second DMRS scheme can let the UE device know that the DMRS position for the PDSCH carrying the RMSI is the first orthogonal frequency division multiplexing (OFDM) symbol of said PDSCH allocation—referred to as PDSCH mapping type B).

公开(公告)号：US20210320824A9

公开(公告)日：2021-10-14

申请号：US16587784

申请日：2019-09-30

Applicant: AT&T Intellectual Property I, L.P.

Inventor： Arunabha Ghosh ,  Ralf Bendlin ,  Saeed Ghassemzadeh ,  Thomas Novlan ,  Salam Akoum ,  SaiRamesh Nammi ,  Xiaoyi Wang

IPC: H04L25/02 ,  H04L27/26 ,  H04L1/00 ,  H04L5/00 ,  H04W16/28

Abstract: An example method may include a processing system of a base station having a processor selecting a blank resource of a time and frequency resource grid of the base station for a transmission of a channel sounding waveform and transmitting the channel sounding waveform via the blank resource. Another example method may include a processing system of a channel sounding receiver receiving at a location, from a base station, a channel sounding waveform via a blank resource of a time and frequency resource grid of the base station, and measuring a channel property at the location based upon the channel sounding waveform.