公开(公告)号：US10244506B2

公开(公告)日：2019-03-26

申请号：US15860410

申请日：2018-01-02

Applicant: Apple Inc.

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

IPC: H04W68/00 ,  H04W72/04 ,  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：US10237870B2

公开(公告)日：2019-03-19

申请号：US15147443

申请日：2016-05-05

Applicant: Apple Inc.

Inventor： Guoqing Li ,  Joonsuk Kim ,  Christiaan A. Hartman ,  Yong Liu ,  Chiu Ngok E. Wong ,  Syed Aon Mujtaba ,  Su Khiong Yong

IPC: H04W72/04 ,  H04L5/00 ,  H04B7/0452 ,  H04L1/18 ,  H04W84/12

Abstract: Managing orthogonal frequency division multiple access (OFDMA) uplink acknowledgements is described herein. An example system can include an interface circuit to generate a physical layer convergence protocol data unit (PPDU) including a physical layer preamble, a first sub-channel field corresponding to a first station, and a second sub-channel field corresponding to a second station. The first sub-channel field can carry a first unicast trigger corresponding to the first station, and the second sub-channel field can carry a second unicast trigger corresponding to the second station. The interface circuit can also transmit the PPDU to the first and second stations.

公开(公告)号：US10219224B2

公开(公告)日：2019-02-26

申请号：US16028659

申请日：2018-07-06

Applicant: Apple Inc.

Inventor： Chiu Ngok E. Wong ,  Christiaan A. Hartman ,  Joonsuk Kim ,  Syed Aon Mujtaba ,  Yong Liu ,  Su Khiong Yong

IPC: H04W52/02 ,  H04L29/06 ,  H04L1/00 ,  H04W40/24 ,  H04W40/00 ,  H04L12/931 ,  H04W88/02 ,  H04W84/12 ,  H04L29/08

Abstract: Embodiments described herein relate to providing reduced power consumption in wireless communication systems, such as 802.11 WLAN systems. Timing information regarding power save opportunities (PSOPs) may be provided in communication frames, which may inform mobile devices of expected frame exchange periods during which they may transition to a Doze state. Additional PSOP information may be included in beacon frames, which may inform mobile devices of expected multicast periods during which they may transition to a Doze state. This may operate to provide improvements in terms of power consumption.

公开(公告)号：US20190037544A1

公开(公告)日：2019-01-31

申请号：US16145030

申请日：2018-09-27

Applicant: Apple Inc.

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

IPC: H04W72/04

Abstract: This disclosure relates to providing system information for cell access to link budget limited devices. According to some embodiments, a base station may transmit an announcement information block (AIB) in a downlink shared data channel (e.g., PDSCH), wherein the AIB contains information useable by a UE in determining the location of system information in the downlink shared data channel. The UE can thus determine the location of and decode system information without having to decode a downlink control channel (e.g., PDCCH). This may be important for certain classes of devices, such as link budget limited devices, which have issues in decoding the downlink control channel. Improved paging scheduling techniques are also disclosed which more efficiently use PDCCH paging resources.

公开(公告)号：US20180317178A1

公开(公告)日：2018-11-01

申请号：US16028659

申请日：2018-07-06

Applicant: Apple Inc.

Inventor： Chiu Ngok E. Wong ,  Christiaan A. Hartman ,  Joonsuk Kim ,  Syed Aon Mujtaba ,  Yong Liu ,  Su Khiong Yong

IPC: H04W52/02 ,  H04L29/06 ,  H04W40/00 ,  H04W40/24 ,  H04L1/00 ,  H04L12/931 ,  H04L29/08 ,  H04W88/02 ,  H04W84/12

CPC classification number: H04W52/0274 ,  H04L1/0003 ,  H04L49/201 ,  H04L69/22 ,  H04L69/323 ,  H04W40/005 ,  H04W40/244 ,  H04W52/0209 ,  H04W52/0225 ,  H04W84/12 ,  H04W88/02 ,  Y02D70/00 ,  Y02D70/1222 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/26

Abstract: Embodiments described herein relate to providing reduced power consumption in wireless communication systems, such as 802.11 WLAN systems. Timing information regarding power save opportunities (PSOPs) may be provided in communication frames, which may inform mobile devices of expected frame exchange periods during which they may transition to a Doze state. Additional PSOP information may be included in beacon frames, which may inform mobile devices of expected multicast periods during which they may transition to a Doze state. This may operate to provide improvements in terms of power consumption.

公开(公告)号：US10014900B2

公开(公告)日：2018-07-03

申请号：US15707246

申请日：2017-09-18

Applicant: Apple Inc.

Inventor： Xiaowen Wang ,  Syed Aon Mujtaba ,  Vinay R. Majjigi ,  Joonsuk Kim

IPC: H04B7/00 ,  H04B1/40 ,  H04B7/08 ,  H04B7/06 ,  H04W88/08 ,  H04W84/12

CPC classification number: H04B1/40 ,  H04B7/061 ,  H04B7/0817 ,  H04W84/12 ,  H04W88/08 ,  Y02D70/10

Abstract: Wireless communication devices (UEs) may include multiple receive (RX) chains and associated antennas, and at least one transmit (TX) chain co-located with one of the RX chains. The UE may track instant fading of the antenna gain(s) during reception of packets from an associated access point (AP) device to which the UE intends to transmit packets. The UE may also track long term antenna gain(s), using any packets received at the multiple RX chains within the UE. At a switching occasion, a decision is made by the UE whether to switch antennas. If the instant fading detection is based on packets received no later than a specified time period prior to the switching occasion, then the UE may make the switching decision based on the results of the instant fading tracking. Otherwise, the UE may make the switching decision based on the results of the long term antenna gain tracking.

公开(公告)号：US09967112B2

公开(公告)日：2018-05-08

申请号：US13887207

申请日：2013-05-03

Applicant: Apple Inc.

Inventor： Tarik Tabet ,  Navid Damji ,  Kee-Bong Song ,  Syed Aon Mujtaba ,  Johnson Sebeni ,  Zhu Ji

IPC: H04L25/00 ,  H04L25/02

CPC classification number: H04L25/0206 ,  H04L25/0212 ,  H04L25/0224 ,  H04L25/0256

Abstract: Methods and apparatus for resuming radio channel measurements and estimations after an interruption in reception. In one exemplary embodiment of the present disclosure, an adaptive solution is provided for channel estimation based at least in part on the reception interruption duration. In one variant, an LTE UE determines a windowing length and/or “shape” for a time domain channel estimation algorithm based on at least the interruption duration. In an alternate variant, an LTE UE determines the interpolation coefficients for a filter based on the interruption duration.

公开(公告)号：US09935742B2

公开(公告)日：2018-04-03

申请号：US14867089

申请日：2015-09-28

Applicant: Apple Inc.

Inventor： Tarik Tabet ,  Syed Aon Mujtaba

IPC: H04W4/00 ,  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：US09893745B2

公开(公告)日：2018-02-13

申请号：US14990711

申请日：2016-01-07

Applicant: Apple Inc.

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

IPC: H04B1/04 ,  H04W88/02 ,  H04L5/00 ,  H04L27/36

CPC classification number: H04B1/04 ,  H04B2001/0491 ,  H04L5/0044 ,  H04L27/2636 ,  H04L27/361 ,  H04L27/362 ,  H04W88/02

Abstract: This disclosure relates to a system and method for generating single-carrier frequency division multiple access (SC-FDMA) transmissions using a high efficiency architecture. According to some embodiments, frequency resources allocated for a transmission may be determined. The allocated frequency resources may have a bandwidth less than a channel bandwidth of a frequency channel of the transmission, and may be centered around a particular frequency. The frequency may be offset from the center frequency of the channel. A baseband signal located around DC corresponding to the channel center frequency may be generated. The baseband signal may be up-converted to an RF signal using a local oscillator tuned to the frequency around which the allocated frequency resources are centered. The RF signal may be transmitted.

公开(公告)号：US09853681B2

公开(公告)日：2017-12-26

申请号：US14870119

申请日：2015-09-30

Applicant: Apple Inc.

Inventor： Vinay R. Majjigi ,  Syed Aon Mujtaba ,  Xiaowen Wang

IPC: H04B1/44 ,  H04B7/06 ,  H04B7/08 ,  H04W88/06 ,  H04W84/12

CPC classification number: H04B1/44 ,  H04B7/0602 ,  H04B7/0802 ,  H04W84/12 ,  H04W88/06

Abstract: A user equipment device (UE) may be configured to collect first performance information from antennas of a first plurality of antennas. The first plurality of antennas may be coupled to a first radio of the UE that may be configured to perform wireless communications according to a first RAT. The UE may determine, based on at least the first performance information, a highest performing antenna of the first plurality of antennas to use for communications according to the first RAT. Additionally, the UE may determine, also based on at least the first performance information, a first antenna of a second plurality of antennas to use for communications according to a second RAT. The second plurality of antennas may be coupled to a second radio of the UE that may be configured to perform wireless communications according to the second RAT.