公开(公告)号：US10206225B2

公开(公告)日：2019-02-12

申请号：US15850981

申请日：2017-12-21

Applicant: Apple Inc.

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

IPC: H04W72/12 ,  H04W28/02 ,  H04L5/00

Abstract: The disclosure describes procedures for allocating network resources for a mobile device communicating within a Long Term Evolution (LTE) network. The mobile device can be configured to decode a physical downlink shared channel (PDSCH), acquire first and second physical downlink control channel (PDCCH) decode indicators from a payload of the same PDSCH communication, decode a PDCCH for downlink control information (DCI) associated with a first application data type based on the first PDCCH decode indicator a second application data type based on the second PDCCH decode indicator. The first PDCCH decode indicator can identify an upcoming LTE subframe where the mobile device is required to decode the PDCCH for DCI associated VoLTE resource assignments and the second PDCCH decode indicator can identify an upcoming LTE subframe where the mobile device is required to decode the PDCCH for DCI associated with high bandwidth best effort (BE) data resource assignments.

公开(公告)号：US20180368121A1

公开(公告)日：2018-12-20

申请号：US16113039

申请日：2018-08-27

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：US10149315B2

公开(公告)日：2018-12-04

申请号：US15014498

申请日：2016-02-03

Applicant: Apple Inc.

Inventor： Farouk Belghoul ,  Tarik Tabet ,  Syed A. Mujtaba

IPC: H04W72/12 ,  H04W76/15 ,  H04L1/18 ,  H04L5/14 ,  H04W72/04 ,  H04W76/02 ,  H04L5/00 ,  H04W84/12 ,  H04W16/14 ,  H04L27/00

Abstract: Apparatus and methods for time division based communication between a wireless device and a wireless network in a licensed radio frequency (RF) band and an unlicensed RF band are disclosed. The wireless device receives downlink control information (DCI), via a primary component carrier (PCC) of a primary cell (Pcell) in the licensed RF band, indicating downlink (DL) data transmission via a secondary component carrier (SCC) of a secondary cell (Scell) in the unlicensed RF band. The wireless device receives via the SCC part of the DL data transmission and transmits a control message via the PCC in response. The wireless device sends a scheduling request (SR) to the eNodeB and receives uplink (UL) transmission opportunities in a combination of the licensed RF band and the unlicensed RF band. The wireless device performs a clear channel assessment before reserving and transmitting to the eNodeB in the unlicensed RF band.

公开(公告)号：US20180279381A1

公开(公告)日：2018-09-27

申请号：US15989864

申请日：2018-05-25

Applicant: Apple Inc.

Inventor： Tarik Tabet ,  Youngjae Kim ,  Syed Aon Mujtaba

IPC: H04W74/08

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：US10009819B2

公开(公告)日：2018-06-26

申请号：US14066619

申请日：2013-10-29

Applicant: Apple Inc.

Inventor： Samy Khay-Ibbat ,  Tarik Tabet

IPC: H04W28/02 ,  H04W36/30 ,  H04W40/08 ,  H04W48/18

CPC classification number: H04W36/30 ,  H04W28/0221 ,  H04W40/08 ,  H04W48/18

Abstract: Apparatus and methods of performing a network cell transition for a voice over long term evolution (VoLTE) capable mobile device. Initially, the mobile device can detect a call initiation event. Thereafter, the mobile device determines whether a radio signal power associated with its serving LTE network base station is less than a radio access technology (RAT) specific threshold (i.e., an LTE-specific threshold). In a scenario where the radio signal power is less than the RAT-specific threshold the mobile device can effectuate a transition to an available neighbor network base station employing a legacy RAT, prior to establishing a voice call. When the mobile device is in a radio resource control (RRC) connected mode the network cell transition may be associated with an induced network handover procedure. Alternatively, when the mobile device is in an RRC idle mode the network cell transition may be associated with network reselection procedure.

公开(公告)号：US09967838B2

公开(公告)日：2018-05-08

申请号：US14867060

申请日：2015-09-28

Applicant: Apple Inc.

Inventor： Tarik Tabet ,  Sarma V. Vangala ,  Rafael L. Rivera-Barreto

IPC: H04W56/00 ,  H04W76/04 ,  H04L5/00 ,  H04W88/02 ,  H04W88/08

CPC classification number: H04W56/0005 ,  H04L5/001 ,  H04L5/0048 ,  H04L5/0055 ,  H04L5/0098 ,  H04W76/27 ,  H04W76/28 ,  H04W88/02 ,  H04W88/08

Abstract: This disclosure relates to techniques for avoiding loss of synchronization between a cellular device and a cellular network. According to some embodiments, a wireless device and a base station may perform a handshake procedure to select configuration parameters for cellular communication. The handshake procedure may establish a system frame number and subframe number at which the selected configuration parameters take effect. The wireless device and the base station may implement the selected configuration parameters at the selected system frame number and subframe number.

公开(公告)号：US09949153B2

公开(公告)日：2018-04-17

申请号：US14870266

申请日：2015-09-30

Applicant: Apple Inc.

Inventor： Tarik Tabet ,  Sarma V. Vangala ,  Samy Khay-Ibbat ,  Swaminathan Balakrishnan ,  Ajoy K. Singh ,  Sree Ram Kodali ,  Rafael L. Rivera-Barreto ,  Syed Aon Mujtaba ,  Faraz Faheem ,  Sreevalsan Vallath

IPC: H04W4/00 ,  H04W24/08 ,  H04W28/02 ,  H04W28/08 ,  H04W72/04 ,  H04W36/04 ,  H04W72/08 ,  H04L12/26 ,  H04W88/02

CPC classification number: H04W24/08 ,  H04L43/0888 ,  H04L43/16 ,  H04W28/0236 ,  H04W28/0284 ,  H04W28/08 ,  H04W36/04 ,  H04W72/0486 ,  H04W72/085 ,  H04W88/02

Abstract: Estimating loading and potential available throughput a serving cell of a wireless user equipment (UE) device. Physical layer metrics of a channel on which the UE communicates with the serving cell may be measured. Cell utilization of the serving cell may be calculated based at least in part on the measured physical layer metrics. A maximum available throughput of the serving cell may be calculated based on the cell utilization.

公开(公告)号：US09906977B2

公开(公告)日：2018-02-27

申请号：US14683984

申请日：2015-04-10

Applicant: Apple Inc.

Inventor： Tarik Tabet ,  Sarma V. Vangala ,  Venkateswara Rao Manepalli ,  Madhusudan Chaudhary

IPC: H04W52/02 ,  H04W28/02 ,  H04L12/803 ,  H04L12/823 ,  H04W76/04 ,  H04L12/815 ,  H04L12/841

CPC classification number: H04W28/0289 ,  H04L47/122 ,  H04L47/22 ,  H04L47/28 ,  H04L47/32 ,  H04W28/0205 ,  H04W72/1252 ,  H04W72/1284 ,  H04W76/27 ,  H04W76/28

Abstract: This disclosure relates to techniques for scheduling radio resource control connections between a wireless device and a network element of a network in advance. According to some embodiments, a wireless device may provide an indication of one or more types of upcoming data traffic to the network element. The network element may schedule one or more radio resource control connections for the wireless device based at least in part on the indication of one or more types of upcoming data traffic. The network element may provide an indication of the scheduled radio resource control connection(s) to the wireless device. The wireless device and the network may establish the scheduled radio resource control connection at the scheduled time.

公开(公告)号：US09893749B2

公开(公告)日：2018-02-13

申请号：US14996331

申请日：2016-01-15

Applicant: Apple Inc.

Inventor： Lydi Smaini ,  Tarik Tabet ,  Konstantinos Sarrigeorgidis ,  Syed Aon Mujtaba

IPC: H04B1/10 ,  H04L5/00

CPC classification number: H04B1/1018 ,  H04L5/005 ,  H04L5/0053

Abstract: Methods and devices are provided for processing a received communication signal by a UE using an analog complex filter and using a single analog-to-digital converter (ADC). A control channel of the communication signal may be decoded to determine the frequency range in which a payload channel is located. The UE may then demodulate only the frequency range containing the payload channel. A complex representation of the received payload channel may be provided to the analog complex filter, with the payload channel shifted to a non-zero frequency IF. The analog complex filter may attenuate any portion of the complex representation that falls near −IF. The UE may then convert only one component path of the filtered complex representation to a digital signal. A complex representation of the digital signal may then be generated, with the payload channel shifted to DC.

公开(公告)号：US20180020359A1

公开(公告)日：2018-01-18

申请号：US15584507

申请日：2017-05-02

Applicant: Apple Inc.

Inventor： Farouk Belghoul ,  Lydi Smaini ,  Tarik Tabet ,  Syed Aon Mujtaba

IPC: H04W16/14 ,  H04W72/04 ,  H04L5/00 ,  H04W74/00 ,  H04W74/08 ,  H04W84/12 ,  H04W24/08

CPC classification number: H04W16/14 ,  H04L5/001 ,  H04L5/0023 ,  H04L5/0053 ,  H04L5/0062 ,  H04L5/0082 ,  H04L27/0006 ,  H04L27/26 ,  H04W24/08 ,  H04W72/0413 ,  H04W74/008 ,  H04W74/0816 ,  H04W74/085 ,  H04W74/0891 ,  H04W84/12

Abstract: This disclosure relates to performing cellular communication in unlicensed spectrum in a manner that accounts for the possible existence of hidden nodes by opportunistically introducing the use of RTS and CTS messages. A listen-before-talk procedure may be performed to determine whether a wireless medium is available. When the listen-before-talk procedure is complete, an amount of time until a next possible start time for communicating in the cellular communication system according to a timing synchronization scheme for the cellular communication system may be determined. The wireless medium may be occupied until the next possible start time for communicating in the cellular communication system in a manner selected based at least in part on the amount of time until the next possible start time for communicating in the cellular communication system. Cellular communication may be performed on the wireless medium at the next possible start time for communicating in the cellular communication system.