公开(公告)号：US09942820B2

公开(公告)日：2018-04-10

申请号：US14503269

申请日：2014-09-30

Applicant: APPLE INC.

Inventor： Dawei Zhang ,  Tarik Tabet

IPC: H04W36/30 ,  H04W24/08 ,  H04L5/00 ,  H04W84/04 ,  H04W24/10 ,  H04W36/38 ,  H04W72/04 ,  H04W72/08

CPC classification number: H04W36/30 ,  H04L5/001 ,  H04L5/006 ,  H04L5/0098 ,  H04W24/08 ,  H04W24/10 ,  H04W36/38 ,  H04W72/0426 ,  H04W72/085 ,  H04W84/042

Abstract: A system and methods that are performed by a macro cell and a user equipment (UE) to implement a carrier aggregation mode in a network. The system includes a macrocell including a first coverage area and a plurality of small cells, each of the small cells including a second coverage area wherein the plurality of second coverage areas substantially cover the first coverage area. The macro cell operates a first component carrier as a primary component carrier in a carrier aggregation enabled network and one of the small cells operates a second component carrier as a secondary component carrier in the carrier aggregation enabled network.

公开(公告)号：US09935859B2

公开(公告)日：2018-04-03

申请号：US14870328

申请日：2015-09-30

Applicant: Apple Inc.

Inventor： Sarma V. Vangala ,  Tarik Tabet ,  Swaminathan Balakrishnan ,  Yuchul Kim ,  Navid Damji ,  Sreevalsan Vallath ,  Samy Khay-Ibbat ,  Syed Aon Mujtaba

IPC: H04W24/00 ,  H04L12/26 ,  H04W24/06 ,  H04W24/08 ,  H04B17/309

CPC classification number: H04L43/0888 ,  H04B17/309 ,  H04L43/10 ,  H04W24/06 ,  H04W24/08

Abstract: Loading estimation of 3GPP networks. One or more metrics relating to a cell of a 3GPP network may be measured. Loading of the cell may be estimated based on the one or more metrics. The metrics may include metrics measured, estimated, or derived at multiple layers, possibly including one or more of physical layer, radio link control layer, radio resource control layer, or application layer metrics.

公开(公告)号：US20180035471A1

公开(公告)日：2018-02-01

申请号：US15728782

申请日：2017-10-10

Applicant: Apple Inc.

Inventor： Tarik Tabet ,  Youngjae Kim ,  Syed Aon Mujtaba

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

CPC classification number: H04W74/0833 ,  H04J13/0062 ,  H04L1/189 ,  H04W52/34 ,  H04W72/0406 ,  H04W74/004 ,  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：US09883480B2

公开(公告)日：2018-01-30

申请号：US14795733

申请日：2015-07-09

Applicant: Apple Inc.

Inventor： Tarik Tabet ,  Syed Aon Mujtaba ,  Moustafa M. Elsayed

IPC: H04W68/00 ,  H04W72/04 ,  H04W76/04

CPC classification number: H04W68/005 ,  H04W72/042 ,  H04W72/0446 ,  H04W72/048 ,  H04W76/28

Abstract: For paging user devices that are link budget limited (LBL), a base station transmits a special ID that is used by said devices to identify a paging frame and/or a paging occasion. When transmitting a paging message for an LBL device, the base station may use: (a) larger aggregation and larger CFI (than conventionally allowed) and (b) a larger number of resource blocks (than conventionally allowed) for paging payload. If paging messages for LBL devices saturate the paging frame capacity, the base station may allocate a plurality of special IDs. If paging messages for LBL devices and/or other data transfers saturate network capacity, at least a subset of the LBL devices may be directed to enter a connected-state discontinuous reception (DRX) mode, wherein those devices will remain in connected mode and periodically check for resource allocations. Paging payload information may be repeatedly transmitted in successive subframes, to support soft combining.

公开(公告)号：US09848347B2

公开(公告)日：2017-12-19

申请号：US14496950

申请日：2014-09-25

Applicant: APPLE INC.

Inventor： Tarik Tabet ,  Navid Damji ,  Syed Aon Mujtaba ,  Johnson Sebeni

IPC: H04W24/08 ,  H04L5/00 ,  H04W52/02 ,  H04L27/26 ,  H04L25/02 ,  H04B7/06

CPC classification number: H04W24/08 ,  H04B7/0684 ,  H04L5/0023 ,  H04L5/0048 ,  H04L5/0082 ,  H04L25/022 ,  H04L25/0228 ,  H04L27/2613 ,  H04L27/2655 ,  H04W52/0229 ,  Y02D70/1262 ,  Y02D70/23 ,  Y02D70/24 ,  Y02D70/444

Abstract: A station configured to perform a method for determining a wireless property such as a channel estimate, a channel estimation track, a time tracking loop, and a frequency tracking loop. The method includes determining a set of consecutive subframes in which no transmission is scheduled, placing a processor into a first power mode during at least a portion of the set of consecutive subframes, placing the processor into a second power mode during at least another portion of the set of consecutive subframes, receiving a first reference symbol when the processor is in the second power mode and calculating a wireless property based on the first reference symbol.

公开(公告)号：US09832686B2

公开(公告)日：2017-11-28

申请号：US14791687

申请日：2015-07-06

Applicant: Apple Inc.

Inventor： Farouk Belghoul ,  David Boettger ,  Krisztian Kiss ,  Dawei Zhang ,  Tarik Tabet ,  Rafael L. Rivera-Barreto ,  Huarui Liang

IPC: H04L12/28 ,  H04W36/00 ,  H04W76/04 ,  H04W48/16 ,  H04W36/14 ,  H04W48/18 ,  H04W88/06

CPC classification number: H04W36/0022 ,  H04W36/0083 ,  H04W36/14 ,  H04W48/16 ,  H04W48/18 ,  H04W76/27 ,  H04W88/06

Abstract: Mobile devices, base stations, and/or relay stations may implement CSFB (circuit switched fallback) operations by using RRC (radio resource control) connection release and/or handover procedures. If the CSFB RAT (radio access technology) target is not well configured, the UE may be informed and provisioned by the NW during a CSFB procedure with the information to return to LTE. Having this information, the UE may perform an autonomous search of LTE cells after the CSFB call release, speeding up return to LTE. To minimize potential call failures during CSFB, the UE may autonomously perform an additional cell search, in particular a search for cells on a RAT different from the initial target RAT. This creates an opportunity to prevent call failure of CSFB calls that would otherwise fail. The UE may be provisioned during the CSFB procedure with information to perform the additional cell search, should such a search be necessary.

公开(公告)号：US09713154B2

公开(公告)日：2017-07-18

申请号：US15385551

申请日：2016-12-20

Applicant: Apple Inc.

Inventor： Tarik Tabet ,  Farouk Belghoul ,  Dawei Zhang ,  Huarui Liang

IPC: H04W72/04 ,  H04M11/06 ,  H04L5/00 ,  H04W8/00 ,  H04W72/12 ,  H04W84/12 ,  H04W88/06

CPC classification number: H04W72/0453 ,  H04L5/0048 ,  H04L5/0098 ,  H04L27/0006 ,  H04M11/062 ,  H04W8/005 ,  H04W72/0406 ,  H04W72/12 ,  H04W84/12 ,  H04W88/06 ,  H04W88/10

Abstract: This disclosure relates to Wi-Fi signaling in conjunction with cellular communication in unlicensed frequency bands for efficient co-existence. According to one embodiment, a cell may be established between a cellular base station and a wireless user equipment device on a frequency channel in an unlicensed frequency band. A cellular communication may be scheduled between the base station and the user equipment device. A Wi-Fi signal may be transmitted on the frequency channel in conjunction with the scheduled cellular communication. The Wi-Fi signal may indicate a length of the scheduled cellular communication using Wi-Fi signaling. The scheduled cellular communication may be performed via the cell.

公开(公告)号：US09712286B2

公开(公告)日：2017-07-18

申请号：US14963583

申请日：2015-12-09

Applicant: Apple Inc.

Inventor： Tarik Tabet ,  Syed Aon Mujtaba

IPC: H04L12/28 ,  H04L1/18 ,  H04W72/04 ,  H04L5/00 ,  H04L5/16 ,  H04W76/04 ,  H04W88/08

CPC classification number: H04L1/1812 ,  H04L1/1822 ,  H04L1/1825 ,  H04L1/1854 ,  H04L1/1896 ,  H04L5/0055 ,  H04L5/006 ,  H04L5/16 ,  H04W72/0413 ,  H04W72/042 ,  H04W76/28 ,  H04W88/08

Abstract: A user equipment (UE) implements improved communication methods which enable uplink (UL) transmissions consistent with an UL timeline. The UE may have a transmit duty cycle and may transmit acknowledge/negative acknowledge messages to a base station according to the transmit duty cycle. Additionally, the UE may be configured to determine signal-to-interference-plus noise ratio (SINR) between the UE and the base station and compare SINR to a threshold. The UE may transmit redundancy versions of data in consecutive sub-frames with a duty cycle of two transmissions per X+1 sub-frames if SINR is equal or above the threshold and redundancy versions using a duty cycle of one transmission per X sub-frames if SINR is below the threshold. Further, the UE may be configured to communicate a number of UL HARQ processes supported by the UE, receive first information in a first sub-frame, and send second information X sub-frames after the first sub-frame.

公开(公告)号：US20170195964A1

公开(公告)日：2017-07-06

申请号：US15274933

申请日：2016-09-23

Applicant: Apple Inc.

Inventor： Lydi Smaini ,  Tarik Tabet ,  Moustafa M. Elsayed

IPC: H04W52/02

CPC classification number: H04W52/0235 ,  H04W52/0238 ,  H04W52/0241 ,  Y02D70/1224 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146 ,  Y02D70/164 ,  Y02D70/168 ,  Y02D70/24 ,  Y02D70/26

Abstract: A wireless communication device may operate in different power modes based at least on a decoding of a Physical Data Control Channel (PDCCH). The wireless communication device may operate its receiver front end circuitry (RX AFE) in any one of a number of different power modes, and may switch to operating the RX AFE in a different power mode based at least on decoding of the PDCCH. The transmit leakage does not need to be monitored, and the wireless communication device may adjust/adapt the sensitivity and linearity of its RX AFE based on PDCCH decoding and in some cases based additionally on one or more metrics, to reduce power consumption. The different power modes may correspond to different respective combinations of sensitivity level and linearity level at which the RX AFE is operating.

公开(公告)号：US20170171814A1

公开(公告)日：2017-06-15

申请号：US15380175

申请日：2016-12-15

Applicant: Apple Inc.

Inventor： Farouk Belghoul ,  Rafael L. Rivera-Barreto ,  Krisztian Kiss ,  Rohan C. Malthankar ,  Tarik Tabet ,  Cesar Perez

IPC: H04W52/02 ,  H04W4/14 ,  H04W60/00 ,  H04W4/22

CPC classification number: H04W52/0212 ,  H04L65/1006 ,  H04L65/1016 ,  H04L65/1033 ,  H04L65/1073 ,  H04L67/26 ,  H04W4/14 ,  H04W4/90 ,  H04W52/0229 ,  H04W84/12 ,  H04W88/06 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146 ,  Y02D70/164 ,  Y02D70/166 ,  Y02D70/168 ,  Y02D70/26

Abstract: Distributing indications of emergency messages via Wi-Fi. A cellular device may temporarily disable its cellular modem. The cellular device may receive an indication over Wi-Fi that an emergency message has been broadcast. In response, the cellular device may activate its cellular modem and retrieve the emergency message via a cellular network.