公开(公告)号：US10085275B2

公开(公告)日：2018-09-25

申请号：US15260349

申请日：2016-09-09

Applicant: Apple Inc.

Inventor： Moustafa M. Elsayed ,  Tarik Tabet

IPC: H04W72/12 ,  H04L12/861 ,  H04W84/04

CPC classification number: H04W72/1205 ,  H04L49/90 ,  H04W52/0216 ,  H04W52/0261 ,  H04W72/1289 ,  H04W84/042 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146 ,  Y02D70/164 ,  Y02D70/166 ,  Y02D70/168 ,  Y02D70/23 ,  Y02D70/24 ,  Y02D70/26

Abstract: This disclosure relates to synchronization and interprocessor communication techniques in an improved system architecture for a cellular modem. According to some embodiments, a wireless device may include a control module, a downlink module, and an uplink module. The control module may decode control information to determine whether uplink or downlink activities are scheduled. If any uplink or downlink activities are scheduled, the control module may activate one or both of the uplink module or the downlink module to perform the scheduled activities. If no downlink activities are scheduled, the downlink module may not be activated by the control module, and may remain asleep until a later time when downlink activities are scheduled. Likewise, if no uplink activities are scheduled, the uplink module may not be activated by the control module, and may remain asleep until a later time when uplink activities are scheduled.

公开(公告)号：US10064170B2

公开(公告)日：2018-08-28

申请号：US15076967

申请日：2016-03-22

Applicant: Apple Inc.

Inventor： Awais M. Hussain ,  Tarik Tabet ,  Syed Aon Mujtaba

IPC: H04W72/04 ,  H04L5/00

CPC classification number: H04W72/042 ,  H04L5/0053

Abstract: This disclosure relates to techniques for transmitting and receiving control information in the common search space on an enhanced physical downlink control channel (EPDCCH). According to some embodiments, a cellular base station may allocate some resource blocks of a subframe as the EPDCCH. The cellular base station may provide control information on a common search space in the EPDCCH for wireless user equipment (UE) devices in the cell provided by the cellular base station during a subframe. A UE device may monitor the EPDCCH to determine whether any indication on the common search space decodable by the UE device is contained in the EPDCCH, and may decode such information if present.

公开(公告)号：US20180242173A1

公开(公告)日：2018-08-23

申请号：US15961779

申请日：2018-04-24

Applicant: Apple Inc.

Inventor： Francisco J. Gonzalez ,  Rafael L. Rivera-Barreto ,  Rohan C. Malthankar ,  Sarma V. Vangala ,  Tarik Tabet

IPC: H04W24/02 ,  H04B1/3827 ,  H04W28/18

Abstract: System and methods for providing special radio provisions to link budget limited devices. Before establishing a cellular connection with a cellular network, a user equipment device (UE), such as a link budget limited UE, may negotiate the special radio provisions with the network by presenting requested profile information to the network, and receiving back approved profile information from the network. The UE may perform these communications either directly, via a non-cellular communication connection with the network, or indirectly, via a companion or proxy device. When the UE initiates a cellular connection with the network, both entities may use information specified in the approved profile information, which may improve efficiency of the connection. In some scenarios, the approved profile information may identify a class of devices to which the UE belongs. The approved profile information may also be used in establishing connections with other devices of the same class.

公开(公告)号：US10034271B2

公开(公告)日：2018-07-24

申请号：US14726771

申请日：2015-06-01

Applicant: Apple Inc.

Inventor： Tarik Tabet ,  Konstantinos Sarrigeorgidis ,  Moustafa M. Elsayed

IPC: H04W72/04 ,  H04L5/00 ,  H04B17/336

CPC classification number: H04W72/0406 ,  H04B17/336 ,  H04L5/0007 ,  H04L5/0053 ,  H04L5/0091 ,  H04L5/0094

Abstract: A mobile device (UE) may decode the Physical Control Format Indicator Channel (PCFICH) blindly, which may include obtaining resource elements (REs) that are reserved for the Physical Downlink Control Channel (PDCCH), based on a largest value of a control format indicator (CFI), finding a total number of control channel elements (CCEs) according to the obtained REs, numbering the CCEs, and decoding the PDCCH for the largest value of the CFI over the numbered CCEs. Accordingly, the UE does not need to decode the PCFICH) specifically. In some cases, the UE may indicate to the network that it is a constrained device, and the network may transmit control information using a reserved CFI value in response to the indication that the UE is a constrained device. The UE may then not decode the PCFICH, and decode the PDCCH based on the PDCCH occupying a first four OFDM symbols.

公开(公告)号：US10009931B2

公开(公告)日：2018-06-26

申请号：US15728782

申请日：2017-10-10

Applicant: Apple Inc.

Inventor： Tarik Tabet ,  Youngjae Kim ,  Syed Aon Mujtaba

IPC: H04W74/08 ,  H04W72/04 ,  H04W52/34 ,  H04L1/18 ,  H04J13/00 ,  H04W74/00

CPC classification number: H04W74/0833 ,  H04J13/0062 ,  H04L1/189 ,  H04W52/34 ,  H04W72/0406 ,  H04W74/004 ,  H05K999/99 ,  Y02B70/30 ,  Y02D70/00 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146 ,  Y02D70/164 ,  Y02D70/168 ,  Y02D70/26

Abstract: Enhanced random access procedures for link-budget-limited user equipment (UE) devices are disclosed. A user equipment device may transmit a first message containing a Physical Random Access Channel (PRACH). The PRACH contains instances of a Zadoff-Chu sequence, and may be transmitted repeatedly as part of a single random attempt, to facilitate correlation data combining at the base station. The available Zadoff-Chu sequences may be partitioned among a plurality of sets, each set being associated with a respective Doppler shift range (or frequency hop pattern or time repetition pattern). A UE device may signal Doppler shift (or other information) to the base station by selection of one of the sets. The first PRACH transmission and the following PRACH transmission may occur in consecutive subframes. A UE device may select from a special set of Zadoff-Chu sequences (different from a conventional set of sequences), to signal its status as a link-budget-limited device.

公开(公告)号：US20180176848A1

公开(公告)日：2018-06-21

申请号：US15827143

申请日：2017-11-30

Applicant: Apple Inc.

Inventor： Tarik Tabet ,  David Boettger

IPC: H04W36/30 ,  H04W36/36 ,  H04W72/08 ,  H04W72/04 ,  H04W72/10

CPC classification number: H04W36/30 ,  H04W36/08 ,  H04W36/36 ,  H04W72/0453 ,  H04W72/048 ,  H04W72/08 ,  H04W72/10 ,  H04W76/15

Abstract: This disclosure relates to techniques for supporting wireless communication using an anchor carrier and data carriers. A wireless device may attach to a cellular network via an anchor carrier. The wireless device may receive data transfer scheduling information from the cellular network via the anchor carrier. The data transfer scheduling information may indicate a data carrier on which data transfer is scheduled. The wireless device may receive data for the data transfer via the data carrier.

公开(公告)号：US09986446B2

公开(公告)日：2018-05-29

申请号：US15169400

申请日：2016-05-31

Applicant: Apple Inc.

Inventor： Francisco J. Gonzalez ,  Rafael L. Rivera-Barreto ,  Rohan C. Malthankar ,  Sarma V. Vangala ,  Tarik Tabet

IPC: H04W24/02 ,  H04W28/18 ,  H04L29/08 ,  H04W8/04 ,  H04B1/3827 ,  H04W88/06

CPC classification number: H04W24/02 ,  H04B1/385 ,  H04L67/303 ,  H04W8/04 ,  H04W28/18 ,  H04W74/006 ,  H04W76/10 ,  H04W88/06

Abstract: System and methods for providing special radio provisions to link budget limited devices. Before establishing a cellular connection with a cellular network, a user equipment device (UE), such as a link budget limited UE, may negotiate the special radio provisions with the network by presenting requested profile information to the network, and receiving back approved profile information from the network. The UE may perform these communications either directly, via a non-cellular communication connection with the network, or indirectly, via a companion or proxy device. When the UE initiates a cellular connection with the network, both entities may use information specified in the approved profile information, which may improve efficiency of the connection. In some scenarios, the approved profile information may identify a class of devices to which the UE belongs. The approved profile information may also be used in establishing connections with other devices of the same class.

公开(公告)号：US09973957B2

公开(公告)日：2018-05-15

申请号：US14488499

申请日：2014-09-17

Applicant: Apple Inc.

Inventor： Vinay R. Majjigi ,  Tarik Tabet ,  Christian W. Mucke ,  Syed Aon Mujtaba

IPC: H04W24/10 ,  H04L25/02

CPC classification number: H04W24/10 ,  H04L25/0202 ,  H04L25/0206

Abstract: This disclosure relates to application dependent channel condition assessment mode selection for reduced power consumption in cellular communications. In one embodiment, a channel condition assessment mode may be selected for assessing a wireless communication channel used for a cellular link. The channel condition assessment mode may be selected from at least two channel condition assessment modes, and may be selected at least in part based on application characteristics of an application using the cellular link. Channel condition assessment may be performed according to the selected channel condition assessment mode. Channel condition assessment results obtained from the channel condition assessment may be transmitted to a cellular base station via the cellular link.

公开(公告)号：US09954650B2

公开(公告)日：2018-04-24

申请号：US15439568

申请日：2017-02-22

Applicant: Apple Inc.

Inventor： Tarik Tabet ,  Vinay R. Majjigi ,  Syed A. Mujtaba ,  Christian W. Mucke

IPC: H04L1/18 ,  H04W76/04 ,  H04W52/02 ,  H04L1/16

CPC classification number: H04W52/0222 ,  H04L1/1671 ,  H04L1/1812 ,  H04L1/1825 ,  H04L1/1854 ,  H04L1/1864 ,  H04L1/1887 ,  H04W76/28 ,  Y02D70/00 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/166 ,  Y02D70/22 ,  Y02D70/23 ,  Y02D70/24 ,  Y02D70/26

Abstract: Apparatus and methods are disclosed for performing delayed hybrid automatic repeat request (HARQ) communications in the downlink (DL) to reduce power consumption for a user equipment (UE) during a connected mode discontinuous reception (C-DRX) cycle. An enhanced NodeB can be configured to monitor a physical uplink control channel (PUCCH) for DL HARQ information to determine when the PUCCH contains a negative acknowledgement (NACK) message, and in response to determining that the PUCCH contains a NACK message, the eNodeB can wait until a next C-DRX ON duration to transmit a HARQ DL retransmission. The eNodeB can also determine whether or not to bundle the HARQ DL retransmission in consecutive transmission time intervals, based on a signal to interference plus noise ratio (SINR) associated with the UE.

公开(公告)号：US09942847B2

公开(公告)日：2018-04-10

申请号：US14987805

申请日：2016-01-05

Applicant: Apple Inc.

Inventor： Moustafa M. Elsayed ,  Tarik Tabet ,  Konstantinos Sarrigeorgidis

IPC: G08C17/00 ,  H04W52/02

CPC classification number: H04W52/0225 ,  H04W52/0216 ,  H04W52/0229 ,  H04W52/0274 ,  Y02D70/00 ,  Y02D70/1222 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146 ,  Y02D70/164 ,  Y02D70/168 ,  Y02D70/24 ,  Y02D70/26

Abstract: This disclosure relates to implementing an adaptive sleep schedule for PDCCH decoding. In some embodiments, prior to receiving PDCCH signaling, a user equipment device may schedule wireless communication circuitry to prepare for and decode the PDCCH signaling, which may include dynamically preparing a first interrupt for the wireless communication circuitry to perform the preparing for and the decoding. In response to the first interrupt, the UE may prepare for and decode the PDCCH signaling using the wireless communication circuitry. The UE may analyze the result of the decoding, which may include determining that the PDCCH signaling does not comprise information for the UE. In response to determining that the PDCCH signaling does not comprise information for the UE, the UE may schedule the wireless communication circuitry to shut down, which may include dynamically preparing a second interrupt to shut down the wireless communication circuitry.