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公开(公告)号：US20230156804A1
公开(公告)日：2023-05-18
申请号：US17598223
申请日：2020-08-05
Applicant: Apple Inc.
Inventor： Chunxuan Ye , Dawei Zhang , Haitong Sun , Sigen Ye , Weidong Yang , Oghenekome Oteri , Hong He , Yushu Zhang , Sarma V. Vangala , Haijing Hu
CPC classification number: H04W74/0833 , H04L5/0091 , H04B7/18563 , H04W74/002
Abstract: Methods and systems to enhance NR RACH procedure to accommodate non-terrestrial networks (NTN) are disclosed. The length of the RAR window may be extended. A NTN-RNTI associated with the time-frequency resources used for the PRACH preamble may be used to scramble the CRC of DCI used for downlink assignment in the RAR. The DCI content may include information on the associated PRACH preamble to assist the UE in distinguishing between RARs generated as a response to PRACH preambles transmitted by different UEs from different system frames. The NTN-RNTI may contain information on the system frames when the UE sends the PRACH preamble. The RA-RNTI associated with the time-frequency resources used for the PRACH preambles transmitted from different frames may be used to scramble different subsets of the CRC of the DCI format 1_0 to assist the UE in distinguishing between RARs generated in response to the different PRACH preambles.
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公开(公告)号：US20230136259A1
公开(公告)日：2023-05-04
申请号：US17787829
申请日：2021-09-24
Applicant: APPLE INC.
Inventor： Alexander Sirotkin , Naveen Kumar R. Palle Venkata , Haijing Hu , Pavan Nuggehalli , Sarma V. Vangala , Yuqin Chen , Zhibin Wu , Sethuraman Gurumoorthy , Fangli Xu , Ralf Rossbach
Abstract: Methods, systems, apparatuses, and computer programs for enhancing UE handover. In one aspect, the method can include obtaining a request for a handover event from a UE, wherein the request includes at least (i) a request for access to a primary cell group and (ii) data indicating capabilities of the UE, determining, based on the UE capabilities, that the UE is capable of maintaining communication with a secondary cell group of a base station during handover of the UE to the primary cell group of the first base station, generating based on the determined UE capability, a handover command that instructs the UE to maintain communication with the secondary cell group of the base station during handover of the UE to the primary cell group, encoding the generated handover command for transmission to the UE, and transmitting the generated handover command to the UE.
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公开(公告)号：US20230041601A1
公开(公告)日：2023-02-09
申请号：US17439325
申请日：2021-08-04
Applicant: APPLE INC.
Inventor： Sarma V. Vangala , Alexander Sirotkin , Fangli XU , Haijing Hu , Naveen Kumar R. Palle Venkata , Pavan Nuggehalli , Yuqin Chen , Zhibin Wu , Sethuraman Gurumoorthy , Ralf Rossbach
Abstract: A UE may perform a location-based conditional handover (CHO) based on a region information and size parameter associated with a serving cell of a non-terrestrial network (NTN). In time-based CHO, the UE may perform CHO in response to expiration of a network-configured wait time. Alternatively, the UE may perform CHO by randomly selecting a wait time from a network configured time range. The selection may be randomized using a network provided seed or using a cell Radio Network Temporary Identifier (RNTI) value. In elevation-based CHO, the UE may perform CHO in response to the elevation angle of a satellite being less than a network configured threshold. When the UE is configured with multiple cells of the NTN, and the CHO criteria for two or more of the cells are satisfied, the UE may select a target cell for CHO based on network indicated prioritization of the cells.
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公开(公告)号：US20230041087A1
公开(公告)日：2023-02-09
申请号：US17878852
申请日：2022-08-01
Applicant: Apple Inc.
Inventor： Alexander Sirotkin , Pavan Nuggehalli , Sarma V. Vangala
IPC: H04W36/00
Abstract: The present application relates to devices and components including apparatus, systems, and methods to provide positional information for one or more NTN devices to a UE to be utilized for one or more UE operations.
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公开(公告)号：US11558894B2
公开(公告)日：2023-01-17
申请号：US15015613
申请日：2016-02-04
Applicant: Apple Inc.
Inventor： Sarma V. Vangala , Tarik Tabet , Rafael L. Rivera-Barreto , Swaminathan Balakrishnan , Samy Khay-Ibbat
Abstract: Embodiments described herein relate to an apparatus, system, and method for providing aperiodic uplink grants to a UE for aperiodic communications from the UE to a base station. In some embodiments, the UE may be configured to communicate information to the base station, which may be useable by the base station to determine an uplink grant schedule for subsequent communications between the base station and the UE. This uplink grant schedule may be aperiodic, i.e., the uplink grants may be issued at non-uniform intervals of time. The UE may receive the uplink grants from the base station according to the uplink grant schedule. The UE may transmit uplink communications to the base station in response to the received uplink grants.
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Patent Agency Ranking
公开(公告)号：US20220361239A1
公开(公告)日：2022-11-10
申请号：US17437800
申请日：2021-01-14
Applicant: Apple Inc.
Inventor： Fangli Xu , Dawei Zhang , Haijing Hu , Murtaza A. Shikari , Ralf Rossbach , Sarma V. Vangala , Srinivasan Nimmala
Abstract: Apparatuses, systems, and methods for non-small data transmission (non-SDT) dedicated radio bearer (DRB) handling while in a radio resource control (RRC) inactive state. A wireless device may determine, while operating in the RRC inactive state, that non-SDT data is available for transmission on a non-SDT DRB and determine, based on one or more conditions, to transmit, to a base station, non-SDT data arrival information during SDT procedure. The one or more conditions may be associated with arrival time of the non-SDT data and/or an amount of non-SDT data to be transmitted. The arrival time may be relative to arrival of SDT data, initiation of an SDT procedure, and/or initiation of a subsequent transmission period of an SDT procedure.
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公开(公告)号：US20220361088A1
公开(公告)日：2022-11-10
申请号：US17441254
申请日：2021-05-10
Applicant: Apple Inc.
Inventor： Dawei Zhang , Fangli Xu , Haijing Hu , Naveen Kumar R. Palle Venkata , Ralf Rossbach , Sarma V. Vangala , Sethuraman Gurumoorthy , Srirang A. Lovlekar , Yuqin Chen , Zhibin Wu
Abstract: Provided is a method for a user equipment (UE), comprising: acquiring a notification for participating in an access control process for an multicast/broadcast service (MBS) session; and participating in an access control process for the MBS session by using MBS specific configuration information.
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138.发明申请公开(公告)号：US20220322159A1
公开(公告)日：2022-10-06
申请号：US17438353
申请日：2020-10-29
Applicant: Apple Inc.
Inventor： Fangli Xu , Haijing Hu , Naveen Kumar R. Palle Venkata , Ralf Rossbach , Sarma V. Vangala , Sethuraman Gurumoorthy , Srinivasan Nimmala , Sudeep Manithara Vamanan , Yuqin Chen
Abstract: Techniques are described for improving service continuity for Multicast and Broadcast Services (MBS) communications during handover. Techniques are included for supporting lossless handover and data forwarding during handover for peer-to-multiple (PTM) MBS transmission. Lossless handover may be achieved in part by the user equipment (UE) providing to the target base station an indication of the next packet of the MBS session to be received following an RRC reconfiguration message, and an indication of any MBS packets provided by the source base station prior to the RRC reconfiguration message that were not properly received by the UE. Data forwarding may be performed from the source base station to the target base station if the MBS session was not configured on the target base station prior to the handover. Data forwarding may be omitted if the MBS session was configured on the target base station prior to the handover.
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公开(公告)号：US20220312311A1
公开(公告)日：2022-09-29
申请号：US17593121
申请日：2020-04-08
Applicant: APPLE INC.
Inventor： Sarma V. Vangala , Dawei Zhang , Fangli Xu , Haijing Hu , Murtaza A. Shikari , Sethuraman Gurumoorthy , Yuqin Chen , Zhibin Wu
Abstract: Methods, systems, and devices for wireless communications are described for cell selection criteria for Integrated Access and Backhaul (IAB) nodes.
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公开(公告)号：US10652788B2
公开(公告)日：2020-05-12
申请号：US16037788
申请日：2018-07-17
Applicant: Apple Inc.
Inventor： Tarik Tabet , Farouk Belghoul , Samy Khay-Ibbat , Sarma V. Vangala , Rafael L. Rivera-Barreto , David Boettger , Awais M. Hussain , Syed Aon Mujtaba
IPC: H04W36/00 , H04B17/336 , H04B17/382
Abstract: This disclosure relates to techniques for a link budget limited UE to improve communications performance with a cellular network. The UE may perform signal to interference noise ratio (SINR) measurements and use these measurements to adjust a received signal power value that is provided to the cellular network as a received signal power measurement. The UE may generate the received signal power value based at least in part on the SINR measurement in order to reduce the likelihood of handover when the UE has good SINR but poor received signal power. The UE may also provide preferred configuration information to the base station which enhances the performance of the UE when link budget limited. The configuration information may specify one or more parameter values designed to provide improved performance for a link budget limited device.
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