公开(公告)号：US20240365268A1

公开(公告)日：2024-10-31

申请号：US18770114

申请日：2024-07-11

Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

Inventor： Nagi Mahalingam ,  Anantharaman Balasubramanian ,  Mihaela Beluri ,  Ravikumar V. Pragada ,  Mahmoud Taherzadeh Boroujeni ,  Shahrokh Nayeb Nazar ,  Seyed Mohsen Hosseinian ,  Frank La Sita

IPC: H04W56/00 ,  H04B7/185 ,  H04W74/0833

CPC classification number: H04W56/0045 ,  H04B7/18513 ,  H04W56/0005 ,  H04W74/0833

Abstract: Methods, systems, and devices for addressing timing advance (TA) in non-terrestrial network communication is disclosed herein. A wireless transmit and receive unit (WTRU) may receive system information from a base station attached to an airborne or spaceborne vehicle that indicates a physical random access channel (PRACH) resource. The WTRU may determine a timing offset based on a plurality of information, such as the location information and the system information. The WTRU may transmit a preamble using the timing offset via the PRACH resource. The base station may receive the preamble and send a random access response (RAR) that includes, for example, a TA command. The WTRU may receive the RAR including the TA command and combine the timing offset with the TA command to determine an actual TA, after which the WTRU may use the actual TA for uplink transmissions.

公开(公告)号：US11689280B2

公开(公告)日：2023-06-27

申请号：US17290311

申请日：2019-10-30

Applicant: InterDigital Patent Holdings, Inc.

Inventor： Nagi Mahalingam ,  Anantharaman Balasubramanian ,  Ravikumar Pragada ,  Dylan Watts ,  Yugeswar Deenoo

IPC: H04B17/309 ,  H04B7/185 ,  H04B7/06 ,  H04W16/28 ,  H04W72/542

CPC classification number: H04B7/18513 ,  H04B7/0695 ,  H04B17/309 ,  H04W16/28 ,  H04W72/542

Abstract: A wireless transmit/receive unit (WTRU) may identify a plurality of candidate satellite constellations. The WTRU may determine an elevation angle and/or an orbit associated with each of the plurality of candidate satellite constellations. The WTRU may select a satellite constellation from the plurality of candidate constellations for sell selection. The WTRU may identify a plurality of candidate beams associated with the selected satellite constellation. The WTRU may determine an RSRP/RSRQ for each of the plurality of candidate beams. The WTRU may determine a weighted ranking of the plurality of candidate beams. The WTRU may determine the weighted ranking using the determined RSRP/RSRQ, prevailing load intensities, elevation angle, dwelling duration, link switch probability, and/or a quality of service (QoS). The WTRU may select a beam from the plurality of candidate beams for cell selection. The WTRU may select the beam based on the weighted ranking.

公开(公告)号：US11553312B2

公开(公告)日：2023-01-10

申请号：US17026719

申请日：2020-09-21

Applicant: InterDigital Patent Holdings, Inc.

Inventor： Anantharaman Balasubramanian ,  Ravikumar V. Pragada

IPC: H04W4/06 ,  H04W4/08 ,  H04W72/00 ,  H04W4/40 ,  H04B7/185 ,  H04W72/12

Abstract: Systems, methods, and instrumentalities are disclosed for processing a multi-level transmission sent on a common set of resources using superposition coding, comprising determining a first group radio network temporary identifier (GRNTI), wherein the GRNTI is associated with a broadcast transmission to a plurality of wireless transmit/receive units (WTRUs), determining a second GRNTI, wherein the second GRNTI is associated with a transmission to a subset of the plurality of WTRUs that received the first GRNTI, receiving the multi-level transmission, wherein the multi-level transmission comprises a first level message and a second level message, decoding the first level message from the multi-level transmission using the first GRNTI and preconfigured control information, and decoding the second level message from the multi-level transmission using the second GRNTI.

公开(公告)号：US11191037B2

公开(公告)日：2021-11-30

申请号：US16494394

申请日：2018-03-16

Applicant: InterDigital Patent Holdings, Inc.

Inventor： Anantharaman Balasubramanian ,  Ravikumar V. Pragada

IPC: H04W52/24 ,  B64C39/02 ,  H04W52/14 ,  H04W52/32

Abstract: Systems, methods, and instrumentalities are disclosed for power control for aerial wireless transmit receive units (WTRUs). Power control may be open loop and may be managed based on altitude. Open loop power control may be based partly on path loss estimation from neighboring cells and may be coordinated among interfering neighboring eNBs using path loss information. Dynamic power control may be driven by the WTRU. Reference signal transmissions by an eNB may use uplink resources for path loss estimation, and interference estimation may be based on uplink reference signals. Path loss estimation may be based on downlink reference signals. Dynamic blanking may be provided for Cell-specific Reference Signals (CRS), and random access (e.g. RACH) may be provided for aerial WTRUs.

公开(公告)号：US20210297921A1

公开(公告)日：2021-09-23

申请号：US16482887

申请日：2018-02-01

Applicant: InterDigital Patent Holdings, Inc.

Inventor： Ravikumar V. Pragada ,  Anantharaman Balasubramanian ,  Tanbir Haque

IPC: H04W36/32 ,  H04W36/00 ,  H04W72/04

Abstract: Systems, methods, and instrumentalities are disclosed for a wireless transmit/receive unit (WTRU) configured to receive a configuration defining a dedicated radio resource assignment for a travel path, wherein the dedicated radio resource assignment comprises dedicated resources assigned to the WTRU in a plurality of cells and specifies a time interval when the resources will be dedicated to the WTRU in each of the plurality of cells; determine a first time has been reached and utilize dedicated resources in a first cell based on reaching the first time; and determine a second time has been reached and utilize dedicated resources in a second cell based on reaching the second time.

公开(公告)号：US20200250993A1

公开(公告)日：2020-08-06

申请号：US16756723

申请日：2018-10-16

Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

Inventor： Jun Li ,  Nagi Mahalingam ,  Anantharaman Balasubramanian ,  Ravikumar V. Pragada ,  Michel Roy

IPC: G08G5/00 ,  B64C39/02 ,  H01Q1/28

Abstract: An unmanned aerial system (UAS) may execute a mission planned by a UAS traffic management (UTM) system. The UAS may receive a mission planning response message from the UTM that includes a mission route for the UAS to navigate and a configuration of one or more trigger events. The mission route may be made up of a sequence of waypoints in an airspace. Each of the waypoints may be configured with a dynamic path conforming profile (PCP) a dynamic required navigation performance (RNP) value. The UAS may monitor at least the RNP value in one or more time intervals to determine if a trigger event occurs. The UAS may transmit a path conformance status report to the UTM upon determining that a trigger event of the one or more trigger events occurred. The path conformance status report may indicate conformance to one or more parameters specified in the PCP.