公开(公告)号：US11963237B2

公开(公告)日：2024-04-16

申请号：US17289143

申请日：2019-10-22

Applicant: InterDigital Patent Holdings, Inc.

Inventor： Nagi Mahalingam ,  Anantharaman Balasubramanian ,  Ravikumar V. Pragada ,  Faris Alfarhan ,  Yugeswar Deenoo

IPC: H04W74/08 ,  H04W72/1263 ,  H04W74/0833

CPC classification number: H04W74/0841 ,  H04W72/1263 ,  H04W74/0866

Abstract: Method, apparatus and systems are disclosed. In one representative embodiment, a method may be implemented by a wireless transmit/receive unit (WTRU) for communication via a network access point (NAP). The method may include the WTRU receiving from the NAP a set of preambles and corresponding propagation delay related thresholds and determining propagation delay related information associated with a distance between the WTRU and the NAP or a location in a coverage of the NAP. The method may further include selecting a subset of preambles from the set of preambles based on the determined propagation delay related information, randomly selecting a preamble from the selected subset of preambles, and sending the randomly selected preamble to the NAP.

公开(公告)号：US20240090028A1

公开(公告)日：2024-03-14

申请号：US18508027

申请日：2023-11-13

Applicant: InterDigital Patent Holdings, Inc.

Inventor： Anantharaman Balasubramanian ,  Ravikumar V. Pragada ,  Nagi Mahalingam

IPC: H04W74/08 ,  B64C39/02 ,  H04L1/1607 ,  H04L5/00 ,  H04W4/08 ,  H04W72/23

CPC classification number: H04W74/0808 ,  B64C39/024 ,  H04L1/1621 ,  H04L5/0055 ,  H04W4/08 ,  H04W72/23 ,  H04W92/18

Abstract: A wireless transmit/receive unit (WTRU) may receive a downlink communication from a network over a first interface transmitted to one or more WTRUs in a group of WTRUs. The WTRU may determine an access class of the WTRU based on a packet loss percentage of the downlink communication. The access class may be associated with a contention window for accessing a second interface. The WTRU may transmit packet loss information to the one or more WTRUs over the second interface in the contention window. The WTRU may receive packet loss feedback from the one or more WTRUs over the second interface. The WTRU may determine that the access class of the WTRU is a highest class of the one or more WTRUs. The WTRU may transmit a single groupcast negative acknowledgement (gNACK) to the network on behalf of the one or more WTRUs over the first interface.

公开(公告)号：US11818757B2

公开(公告)日：2023-11-14

申请号：US16977708

申请日：2019-03-01

Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

Inventor： Anantharaman Balasubramanian ,  Ravikumar Pragada ,  Nagi Mahalingam

IPC: H04W4/00 ,  H04W74/08 ,  B64C39/02 ,  H04L1/1607 ,  H04L5/00 ,  H04W4/08 ,  H04W72/23 ,  H04W92/18

CPC classification number: H04W74/0808 ,  B64C39/024 ,  H04L1/1621 ,  H04L5/0055 ,  H04W4/08 ,  H04W72/23 ,  H04W92/18

Abstract: A wireless transmit/receive unit (WTRU) may receive a downlink communication from a network over a first interface transmitted to one or more WTRUs in a group of WTRUs. The WTRU may determine an access class of the WTRU based on a packet loss percentage of the downlink communication. The access class may be associated with a contention window for accessing a second interface. The WTRU may transmit packet loss information to the one or more WTRUs over the second interface in the contention window. The WTRU may receive packet loss feedback from the one or more WTRUs over the second interface. The WTRU may determine that the access class of the WTRU is a highest class of the one or more WTRUs. The WTRU may transmit a single groupcast negative acknowledgement (gNACK) to the network on behalf of the one or more WTRUs over the first interface.

公开(公告)号：US20210314112A1

公开(公告)日：2021-10-07

申请号：US17266298

申请日：2019-08-07

Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

Inventor： Anantharaman Balasubramanian ,  Nagi Mahalingam ,  Ravikumar V. Pragada ,  Benoit Pelletier

IPC: H04L5/00

Abstract: Wireless transmit/receive units (WTRUs) may include unmanned aerial vehicles (UAVs). The WTRUs/UAVs may cooperate to exchange channel busy ratio (CBR) and/or CBR statistics of one or more (e.g., all) the carriers that the WTRUs/UAVs monitors with each other for carrier selection/carrier reselection. A network may provide one or more inputs on carrier selection. For example, a network may provide one or more inputs on carrier selection based on the congestion that the network infers (e.g., through the CBR measurements reported by the WTRUs/UAVs and/or through its own measurements). MAC/PHY layers may be configured to perform transmit adaptation during PDCP packet duplication. For example, the carrier aggregation capability of receivers may be considered to adapt the number of transmissions per carrier. Based on the carrier aggregation capability of the receivers, the number of transmissions at one or more (e.g., every) carriers may be optimized jointly across carriers.

公开(公告)号：US12301368B2

公开(公告)日：2025-05-13

申请号：US18492317

申请日：2023-10-23

Applicant: InterDigital Patent Holdings, Inc.

Inventor： Anantharaman Balasubramanian ,  Nagi Mahalingam ,  Mihaela C. Beluri ,  Ravikumar Pragada

IPC: H04L1/1812 ,  H04L1/1822 ,  H04L1/1825 ,  H04L1/1829 ,  H04L1/1867

Abstract: Methods and apparatuses are described herein for providing Hybrid Automatic Repeat Request (HARQ) techniques for a non-terrestrial network. For example, a wireless transmit/receive unit (WTRU) may transmit, to a satellite base station (BS), uplink (UL) feedback that includes configuration information for redundancy versions (RVs) and cross redundancy versions (cRVs). The WTRU may receive one or more first RVs associated with a first transport block (TB). The WTRU may receive one or more second RVs associated with a second TB and at least one cross redundancy version (cRV) associated with the first TB and second TB. The cRV may include parity bits generated from both the first TB and second TB. If at least one of the first TB or the second TB is unsuccessfully decoded, the WTRU may decode the first TB and second TB jointly based on the at least one cRV.

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：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.