公开(公告)号：US20190124709A1

公开(公告)日：2019-04-25

申请号：US16227357

申请日：2018-12-20

Applicant: Apple Inc.

Inventor： Farouk Belghoul ,  Tarik Tabet ,  Rafael L. Rivera-Barreto

IPC: H04W76/16 ,  H04W72/08 ,  H04W24/10 ,  H04L5/00 ,  H04W76/36

Abstract: This disclosure relates to temporary suspension, and subsequent resumption, of radio resource aggregation in a wireless communication system. A wireless device may establish a communication link with a base station. The communication link with the base station may aggregate radio resources according to a first wireless communication technology and a second wireless communication technology. Use by the communication link of radio resources according to the second wireless communication technology may be suspended. Wireless communication activity according to the second wireless communication technology that is not associated with the communication link may be performed while use by the communication link of radio resources according to the second wireless communication technology is suspended. Use by the communication link of radio resources according to the second wireless communication technology may be resumed after performing the wireless communication activity according to the second wireless communication technology.

公开(公告)号：US20190090292A1

公开(公告)日：2019-03-21

申请号：US16106068

申请日：2018-08-21

Applicant: Apple Inc.

Inventor： Tarik Tabet ,  Lydi Smaini ,  Ronald W. Dimpflmaier

IPC: H04W76/14 ,  H04W56/00 ,  H04W8/00 ,  H04W74/00

Abstract: This disclosure relates to techniques for supporting narrowband device-to-device wireless communication, including possible techniques for performing control and data communications between wireless devices that have performed discovery. A first device may transmit first control information to a second wireless device. The first control information may indicate a buffer status of the first wireless device. The first device may receive second control information from the second wireless device. The second control information may include an acknowledgement indication for the first control information. The first device may transmit a data communication to the second wireless device based at least in part on the first control information and the second control information.

公开(公告)号：US20190045483A1

公开(公告)日：2019-02-07

申请号：US16053186

申请日：2018-08-02

Applicant: Apple Inc.

Inventor： Tarik Tabet ,  Lydi Smaini ,  Ronald W. Dimpflmaier ,  Matthias Sauer ,  Jason C. Fan

IPC: H04W72/00 ,  H04W56/00 ,  H04W4/06 ,  H04W48/10 ,  H04W72/08 ,  H04W36/00

Abstract: This disclosure relates to techniques for supporting narrowband device-to-device wireless communication, including possible techniques for 1) handing off from one master to another and 2) relaying shifted device-to-device synchronization signals in an off grid radio system. The techniques herein may allow for a successor master device to take over a master role, including by transmitting synchronization signals. The techniques herein may allow for a repeater device to expand the boundary of a device-to-device communication group by transmitting synchronization signals that are shifted relative to synchronization signals transmitted by a master device.

公开(公告)号：US10165599B2

公开(公告)日：2018-12-25

申请号：US15153931

申请日：2016-05-13

Applicant: Apple Inc.

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

IPC: H04W72/04 ,  H04W74/08 ,  H04W74/00

Abstract: This disclosure relates to accommodating link budget constrained wireless devices performing random access procedures. A base station may detect a preamble message from a wireless device. It may be determined that the preamble message is received from a link budget constrained wireless device. Characteristics of a response message may be selected based at least in part on determining that the preamble message is received from a link budget constrained wireless device. The response message may be transmitted to the link budget constrained wireless device using the selected characteristics.

公开(公告)号：US20180359709A1

公开(公告)日：2018-12-13

申请号：US16104919

申请日：2018-08-19

Applicant: Apple Inc.

Inventor： Tarik Tabet ,  Samy Khay-Ibbat ,  Awais M. Hussain

IPC: H04W52/24 ,  H04L5/00 ,  H04W52/32 ,  H04W72/04 ,  H04W72/08 ,  H04W52/26

CPC classification number: H04W52/241 ,  H04L5/005 ,  H04L5/0057 ,  H04W52/262 ,  H04W52/32 ,  H04W72/0473 ,  H04W72/048 ,  H04W72/085

Abstract: A link-budget-limited wireless communication device (UE) may implement improved radio link monitoring procedures for enhancing the link-budget of the UE. The UE may monitor the radio link and may determine whether the radio link can support a lowest acceptable link quality according to a hysteresis-based comparison that uses threshold values to determine error rates associated with a physical control channel. The UE may also identify itself to the network as a link-budget-limited device, and the network may enable special link-budget enhancing features for the UE, including boosting the power of the resource elements (REs) carrying physical channel signaling/data to the UE. The UE may detect the presence of power boost and may estimate/determine the power boost level. The UE may modify the threshold values based on the power boost detection and/or results of the power boost level estimation/determination, and may use the modified threshold values for determining radio link quality during radio link monitoring.

公开(公告)号：US20180324782A1

公开(公告)日：2018-11-08

申请号：US16038528

申请日：2018-07-18

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 the UE is a constrained device, and the network may transmit control information according to a value intended for use by constrained devices. The UE may receive the transmitted value, and instead of decoding the PCFICH it may decode the control information based at least on the received value.

公开(公告)号：US10110398B2

公开(公告)日：2018-10-23

申请号：US15179647

申请日：2016-06-10

Applicant: Apple Inc.

Inventor： Sami M. Almalfouh ,  Navid Damji ,  Johnson O. Sebeni ,  Tarik Tabet

IPC: H04W52/02 ,  H04L25/02 ,  H04W24/08 ,  H04B7/08 ,  H04W76/28

Abstract: A wireless device comprises a primary antenna, a primary transceiver, one or more secondary antennas and one or more receive diversity chains. The receive diversity chains, in some embodiments, include transceiver capability. The wireless device measures and collects various statistics. Based on the statistics, the wireless device enables or disables one or more of the receive diversity chains with respect to a cellular radio access technology (RAT). A disabled receive diversity chain, in some instances is then powered down. During an interval when a receive diversity chain is disabled, the control logic periodically or on an event-driven basis enables a given receive diversity chain to probe channel quality indicator (CQI) and channel rank values. In some embodiments, a time interval for collecting a portion of the statistics, is adapted or backed off in anticipation of use of the receive diversity chain, based on traffic circumstances.

公开(公告)号：US10064164B2

公开(公告)日：2018-08-28

申请号：US14817850

申请日：2015-08-04

Applicant: Apple Inc.

Inventor： Tarik Tabet ,  Syed Aon Mujtaba

IPC: H04W72/04 ,  H04W76/28 ,  H04L1/18 ,  H04L5/00 ,  H04L27/26 ,  H04W76/04 ,  H04L1/16

CPC classification number: H04W72/0413 ,  H04L1/1635 ,  H04L1/1812 ,  H04L1/1819 ,  H04L1/1887 ,  H04L5/0044 ,  H04L5/0048 ,  H04L5/0055 ,  H04L5/0092 ,  H04L27/2614 ,  H04W76/28 ,  Y02D70/00 ,  Y02D70/10 ,  Y02D70/12 ,  Y02D70/1242 ,  Y02D70/126 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146 ,  Y02D70/164 ,  Y02D70/168 ,  Y02D70/20 ,  Y02D70/23 ,  Y02D70/25 ,  Y02D70/26

Abstract: In some embodiments, a user equipment (UE) and base station implement improved communication methods which enable a UE that is peak current limited to perform UL transmissions which are consistent with the UL timeline. Embodiments are also presented which enable a UE that is peak current limited to utilize a new form of distributed TTI (transmit time interval) bundling for improved uplink communication performance. In performing “distributed” TTI bundling, the UE may transmit a plurality of redundancy versions of first information to the base station, wherein the plurality of redundancy versions are transmitted in non-consecutive sub-frames with a periodicity of X ms. After the plurality of redundancy versions of first information are transmitted to the base station, the base station may provide a single acknowledge/negative acknowledge (ACK/NACK) to the UE. A method for dynamically generating and using a bundle size for TTI bundling is also disclosed.

公开(公告)号：US10050761B2

公开(公告)日：2018-08-14

申请号：US15273369

申请日：2016-09-22

Applicant: APPLE INC.

Inventor： Samy Khay-Ibbat ,  Tarik Tabet ,  Sarma V. Vangala ,  Swaminathan Balakrishnan ,  Rafael L. Rivera-Barreto ,  Sree Ram Kodali

IPC: H04W76/28 ,  H04W84/04 ,  H04W88/02 ,  H04L5/00 ,  H04W72/12

Abstract: Methods that are performed by a user equipment (UE) and corresponding methods of base stations that allow a UE to determine whether the UE is in a carrier aggregation enabled or disabled state. One exemplary embodiment of a method performed by a UE determines a first artificial value for a first parameter and a second artificial value for a power headroom (PHR) for a secondary component carrier (SCC), the first and second artificial values being substantially low relative to a configuration of the network, generates an artificial report including the first and second artificial values, transmits the artificial report to a primary cell providing a primary component carrier (PCC) and receives an indication that the UE is placed in a carrier aggregation disabled state.

公开(公告)号：US20180227823A1

公开(公告)日：2018-08-09

申请号：US15947161

申请日：2018-04-06

Applicant: APPLE INC.

Inventor： Dawei Zhang ,  Tarik Tabet

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

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.