公开(公告)号：US12192937B2

公开(公告)日：2025-01-07

申请号：US17044586

申请日：2019-04-03

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 ,  H04W74/08 ,  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：US11956725B2

公开(公告)日：2024-04-09

申请号：US17962863

申请日：2022-10-10

Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

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

IPC: H04W52/02 ,  H04W76/28

CPC classification number: H04W52/0229 ,  H04W52/0216 ,  H04W52/0235 ,  H04W76/28

Abstract: A wireless transmit/receive unit (WTRU) may include one or more antennas and a first transceiver operatively coupled to the antennas. The one or more antennas and the first transceiver may be configured to receive a first signal from a network using zero energy from the WTRU. The one or more antennas and the first transceiver may be further configured to extract energy from the first signal. The first transceiver may be further configured to examine a separation between energy threshold events to decode an energy signature of the first signal. The first transceiver may be further configured to activate a second transceiver operatively coupled to the one or more antennas if the decoded energy signature matches a stored energy signature, wherein the second transceiver is powered by the WTRU. The one or more antennas and the second transceiver may be configured to receive a second signal from the network.

公开(公告)号：US20240048283A1

公开(公告)日：2024-02-08

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

CPC classification number: H04L1/1819 ,  H04L1/1822 ,  H04L1/1825 ,  H04L1/1845 ,  H04L1/1864 ,  H04L1/1896

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：US20230292242A1

公开(公告)日：2023-09-14

申请号：US18198044

申请日：2023-05-16

Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

Inventor： Hussain Elkotby ,  Ravikumar V. Pragada ,  Tanbir Haque ,  Patrick Cabrol ,  Anantharaman Balasubramanian ,  Marian Rudolf ,  William E. Lawton

IPC: H04W52/02

CPC classification number: H04W52/0229

Abstract: A method for use in a Wireless Transmit/Receive Unit (WTRU). The method comprises: receiving, using an active receiver, system information comprising a first system information set, wherein the first system information set is currently valid for the WTRU; storing the system information; deactivating the active receiver and activating a passive receiver; determining whether a difference between a first parameter in the BSSI and a first parameter in the first system information set is greater than a threshold value, wherein on a condition that the difference is greater than the threshold value, reactivating the active receiver to receive a second system information set as a currently valid system information set for the WTRU.

公开(公告)号：US11706713B2

公开(公告)日：2023-07-18

申请号：US17414210

申请日：2019-12-17

Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

Inventor： Hussain E. Elkotby ,  Ravikumar V. Pragada ,  Tanbir Haque ,  Patrick Cabrol ,  Anantharaman Balasubramanian ,  Marian Rudolf ,  William E. Lawton

IPC: H04W52/02

CPC classification number: H04W52/0229

Abstract: A method for use in a Wireless Transmit/Receive Unit (WTRU). The method comprises: receiving, using an active receiver, system information comprising a first system information set, wherein the first system information set is currently valid for the WTRU; storing the system information; deactivating the active receiver and activating a passive receiver; determining whether a difference between a first parameter in the BSSI and a first parameter in the first system information set is greater than a threshold value, wherein on a condition that the difference is greater than the threshold value, reactivating the active receiver to receive a second system information set as a currently valid system information set for the WTRU.

公开(公告)号：US20230189148A1

公开(公告)日：2023-06-15

申请号：US17962863

申请日：2022-10-10

Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

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

IPC: H04W52/02 ,  H04W76/28

CPC classification number: H04W52/0229 ,  H04W76/28 ,  H04W52/0216 ,  H04W52/0235

Abstract: A wireless transmit/receive unit (WTRU) may include one or more antennas and a first transceiver operatively coupled to the antennas. The one or more antennas and the first transceiver may be configured to receive a first signal from a network using zero energy from the WTRU. The one or more antennas and the first transceiver may be further configured to extract energy from the first signal. The first transceiver may be further configured to examine a separation between energy threshold events to decode an energy signature of the first signal. The first transceiver may be further configured to activate a second transceiver operatively coupled to the one or more antennas if the decoded energy signature matches a stored energy signature, wherein the second transceiver is powered by the WTRU. The one or more antennas and the second transceiver may be configured to receive a second signal from the network.

公开(公告)号：US20200314752A1

公开(公告)日：2020-10-01

申请号：US16768129

申请日：2018-11-30

Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

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

IPC: H04W52/02 ,  H04W76/28

Abstract: A wireless transmit/receive unit (WTRU) may include one or more antennas and a first transceiver operatively coupled to the antennas. The one or more antennas and the first transceiver may be configured to receive a first signal from a network using zero energy from the WTRU. The one or more antennas and the first transceiver may be further configured to extract energy from the first signal. The first transceiver may be further configured to examine a separation between energy threshold events to decode an energy signature of the first signal. The first transceiver may be further configured to activate a second transceiver operatively coupled to the one or more antennas if the decoded energy signature matches a stored energy signature, wherein the second transceiver is powered by the WTRU. The one or more antennas and the second transceiver may be configured to receive a second signal from the network.

公开(公告)号：US20200100187A1

公开(公告)日：2020-03-26

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：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：US12245138B2

公开(公告)日：2025-03-04

申请号：US17414159

申请日：2019-12-17

Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

Inventor： Tanbir Haque ,  Hussain E. Elkotby ,  Ravikumar V. Pragada ,  Patrick Cabrol ,  Anantharaman Balasubramanian ,  Marian Rudolf ,  William E. Lawton ,  Muhammad U. Fazili

IPC: H04W52/02 ,  H04W24/08 ,  H04W48/18

Abstract: Approaches for idle mode operations for wireless transmit/receive units (WTRUs) with zero-energy (ZE) receivers are disclosed herein. A WTRU operating in idle mode, may receive using the main transceiver over a Uu interface, an energy harvesting (EH) configuration for use over a ZE air interface. The main transceiver may be turned off, and the ZE receiver as part of a ZE idle mode operation, may detect, over the ZE air interface, and harvest energy from ZE reference signals. The WTRU may calculate an amount of energy harvested from the ZE reference signals over a first time period. The WTRU may calculate a ZE idle mode operation energy consumption over the first time period. On a condition that the ZE idle mode operation energy consumption is greater than the harvested energy, the main transceiver may be turned on and the WTRU may enter a Uu interface idle mode operation.