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：US11234183B2

公开(公告)日：2022-01-25

申请号：US16861831

申请日：2020-04-29

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

Inventor： Thomas Novlan

IPC: H04W48/08

Abstract: In order to support integrated access and backhaul (IAB) network functionality, such as topology formation/adaptation, and access and backhaul link management, capability signaling can be configured and exchanged between the network, parent IAB nodes, and child IAB nodes. This can include messages related to IAB-node distributed unit (DU) function capabilities, IAB-node mobile termination (MT) function capabilities, joint IAB-node DU/MT capabilities, and internal IAB node and network capability management and coordination functions. Additionally, the aforementioned system can comprise an IAB capability manager function to coordinate capability messages between the MT and DU functions.

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：US11219051B2

公开(公告)日：2022-01-04

申请号：US16541312

申请日：2019-08-15

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

Inventor： Milap Majmundar ,  Thomas Novlan

IPC: H04W72/12 ,  H04W72/14 ,  H04W72/04

Abstract: In a 5G network, a pre-emptive scheduling request (SR) and a pre-emptive buffer status report (BSR) can be used to reduce the latency of data transmissions on the upstream of a multi-hop integrated access and backhaul (IAB) network from the user equipment UE to the IAB-donor node. A centralized unit (CU) can uniformly ensure that the pre-emptive SR/BSR feature is turned on or off across the entire IAB network regardless of which vendor provides the IAB nodes. Additionally, a message can be sent from a gNodeB to the CU to the IAB node to indicate whether the pre-emptive SR/BSR triggering feature is turned on or off.

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.

公开(公告)号：US11140054B2

公开(公告)日：2021-10-05

申请号：US16837695

申请日：2020-04-01

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

Inventor： Thomas Novlan ,  Milap Majmundar

IPC: H04L12/26 ,  H04L12/24 ,  H04W24/10 ,  H04W24/04 ,  H04W88/08

Abstract: Facilitating measurements and radio link monitoring in a wireless communications system is provided herein. A method can comprise determining, by a network device of a communications network and comprising a processor, a first resource configuration related to first measurement resources of a first radio link between a mobile device and a first distributed unit of distributed units of the communications network. The method can also comprise determining, by the network device, a second resource configuration related to a second measurement resources of a second radio link between the mobile device and a second distributed unit of the distributed units. Further, the method can comprise facilitating, by the network device, a transmission of a report that comprises the first resource configuration and the second resource configuration.

公开(公告)号：US20210266889A1

公开(公告)日：2021-08-26

申请号：US17319030

申请日：2021-05-12

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

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

IPC: H04W72/04 ,  H04W72/08 ,  H04W16/28 ,  H04B7/06 ,  H04B7/08 ,  H04B7/155

Abstract: To facilitate signal alignment for an integrated access backhaul (IAB) node, a system can determine a subset of beams that can be used for communication transmissions. Based on a signal quality associated with the subset of beams, the system can indicate that the subset of beams is to be used for the communication transmission. Consequently, the subset of the beams or another subset of the subset of the beams can be utilized for the communication transmission based on the signal quality of the beams.

公开(公告)号：US20210266796A1

公开(公告)日：2021-08-26

申请号：US17314489

申请日：2021-05-07

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

Inventor： Milap Majmundar ,  Thomas Novlan

IPC: H04W36/00 ,  H04B7/022 ,  H04B7/06 ,  H04W36/30

Abstract: The described technology is generally directed towards overcoming a radio link interruption event, for example caused in the mmWave spectrum by a physical blockage between user equipment and a communications network distributed unit. Described is executing an inter-distributed unit beam switch in response to a radio link interruption trigger when no beams are available to support the user equipment from the distributed unit currently serving the user equipment. The inter-distributed unit beam switch may be performed by notifying a flow control process of the radio link interruption, which can switch to a different distributed unit such as selected by beam quality measurements.

公开(公告)号：US11096040B2

公开(公告)日：2021-08-17

申请号：US16796352

申请日：2020-02-20

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

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

IPC: H04W76/28 ,  H04W8/18 ,  H04W72/04 ,  H04W88/06 ,  H04W52/02

Abstract: One subscriber identity module (SIM) can transmit data in active mode while another SIM is in an idle mode. However, paging for the SIM in idle mode can occur based on a discontinuous reception configuration (DRX) cycle of the active SIM. For example, when the DRX of the active SIM indicates that the active SIM is in an idle state, then the SIM that is currently in an idle state can send messages and vice versa. The DRX cycle information can be exchanged between a first core network and a second core network. Each core network can belong to the same or different mobile network operator and can have separate radio access networks (RAN) or share the RAN. The DRX cycle information and/or a time-division multiplexing (TDM) pattern can be exchanged over the air via a system information broadcast message.