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公开(公告)号：US11044635B2
公开(公告)日：2021-06-22
申请号：US16587200
申请日：2019-09-30
Applicant: Apple Inc.
Inventor： Farouk Belghoul , Lydi Smaini , Tarik Tabet , Syed Aon Mujtaba
IPC: H04W28/08 , H04W72/12 , H04W16/14 , H04W72/04 , H04W72/14 , G01N27/90 , B08B3/02 , B08B3/04 , B08B3/08 , F16H57/01
Abstract: A wireless communication device (UE) may monitor grants received from respective cells associated with one or more first (e.g. licensed) frequency band(s) and one or more second (e.g. unlicensed) frequency band(s). Based on the received grants the UE may determine if an imbalance exists in the radio resource allocation, whereby the UE communicates more than intended in the second frequency band(s). The imbalance may be specified with respect to the ratio or portion of the communications that are conducted in the second frequency band(s) with respect to all wireless communications of the UE. If the UE detects an imbalance, it may transmit a report to the network (e.g. to the base station serving the UE) indicating unfavorable conditions for the UE to be operating in the second frequency band(s). In response, the network may disable the respective cell(s) associated with the second frequency band(s) and/or it may disable carrier aggregation for the UE.
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公开(公告)号：US10979257B2
公开(公告)日：2021-04-13
申请号：US16676721
申请日：2019-11-07
Applicant: Apple Inc.
Inventor： Konstantinos Sarrigeorgidis , Tarik Tabet , Lydi Smaini
Abstract: Techniques are disclosed relating to DC interference cancelation in received wireless signals. Disclosed techniques may be performed in the digital domain, in conjunction with analog cancelation techniques. In some embodiments, a receiver apparatus operates a local oscillator at a frequency corresponding to a particular pilot symbol in a received wireless signal. In some embodiments the receiver estimates DC interference at the frequency based on the received pilot symbol (this may be facilitated by the fact that the contents of pilot symbols are known, because they are typically used for channel estimation). In some embodiments, the receiver apparatus is configured to cancel the DC interference based on the estimate to determine received data in subsequently received signals at the frequency. Disclosed techniques may allow narrowband receivers to efficiently use more of their allocated frequency bandwidth, rather than wasting bandwidth near the frequency of the local oscillator.
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公开(公告)号：US10827431B2
公开(公告)日：2020-11-03
申请号：US15274933
申请日：2016-09-23
Applicant: Apple Inc.
Inventor： Lydi Smaini , Tarik Tabet , Moustafa M. Elsayed
IPC: H04W52/02
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.
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64.发明申请公开(公告)号：US20200221313A1
公开(公告)日：2020-07-09
申请号：US16822123
申请日：2020-03-18
Applicant: Apple Inc.
Inventor： Farouk Belghoul , Lydi Smaini , Tarik Tabet , Syed Aon Mujtaba
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.
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公开(公告)号：US20200100195A1
公开(公告)日：2020-03-26
申请号：US16217364
申请日：2018-12-12
Applicant: Apple Inc.
Inventor： Dhruv Khati , Shiva Krishna Narra , Sanjeevi Balasubramanian , Anjaneyulu Maganti , Lydi Smaini , Tarik Tabet , Mohit Narang , Tiberiu Muresan
Abstract: A power control method for device-to-device communication includes dynamically backing off transmit power value for synchronization signals and discovery messages when the distance between the two devices is less than a pre-determined threshold. The threshold distance may correspond to a distance where the receive power may exceed a pre-determined value. Embodiments may loop the transmit power of synchronization signals between a default transmit power value and backed-off values in consecutive slots of each frame.
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Patent Agency Ranking
66.发明申请公开(公告)号：US20200092145A1
公开(公告)日：2020-03-19
申请号：US16132697
申请日：2018-09-17
Applicant: Apple Inc.
Inventor： Lydi Smaini , Tarik Tabet , Ronald W. Dimpflmaier
Abstract: Systems, methods, and devices are provided for reducing and/or eliminating impact of inter-carrier interference on wireless signals transmitted and received via off-grid radio communications (e.g., Device-to-Device (D2D) communication). The method may include using circuitry to generate a plurality of subcarriers associated with a data signal, such that the plurality of subcarriers transmit the data signal along a narrowband transmission channel. The method may involve using the circuitry to remove a null subcarrier of the plurality of subcarriers that is located at a direct current (DC) frequency. The method may also involve generating an asymmetrical frequency spectrum for a portion of the plurality of subcarriers centered about the removed null subcarrier. The method may also include transmitting the plurality of subcarriers to another electronic device via D2D communication.
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公开(公告)号：US20200037206A1
公开(公告)日：2020-01-30
申请号：US16590866
申请日：2019-10-02
Applicant: Apple Inc.
Inventor： Tarik Tabet , Awais M. Hussain , Lydi Smaini , Moustafa M. Elsayed , Syed Aon Mujtaba , Matthias Sauer , Ronald W. Dimpflmaier , Bernd W. Adler , Christian W. Mucke
Abstract: A user equipment (UE) device may communicate according to a new device category satisfying specified QoS (quality of service) requirements while also satisfying specified link budget requirements, and/or additional optimization requirements. The UE device may communicate with a cellular base station according to a first mode of operation associated with the new device category, and may switch to communicating with the cellular base station according to a second mode of operation associated with a second (pre-existing) device category in response to the link budget requirements exceeding a specified value and the quality of service requirements not being sensitive. The UE device may also switch to communicating with the cellular base station according to a third mode of operation associated with a third (pre-existing) device type in response to the link budget requirement not exceeding the specified value, or the QoS requirements being sensitive and a downlink throughput requirement exceeding a specified throughput value.
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公开(公告)号：US10455454B2
公开(公告)日：2019-10-22
申请号：US15387904
申请日：2016-12-22
Applicant: Apple Inc.
Inventor： Tarik Tabet , Awais M. Hussain , Lydi Smaini , Moustafa M. Elsayed , Syed Aon Mujtaba , Matthias Sauer , Ronald W. Dimpflmaier , Bernd W. Adler , Christian W. Mucke
Abstract: A user equipment (UE) device may communicate according to a new device category satisfying specified QoS (quality of service) requirements while also satisfying specified link budget requirements, and/or additional optimization requirements. The UE device may communicate with a cellular base station according to a first mode of operation associated with the new device category, and may switch to communicating with the cellular base station according to a second mode of operation associated with a second (pre-existing) device category in response to the link budget requirements exceeding a specified value and the quality of service requirements not being sensitive. The UE device may also switch to communicating with the cellular base station according to a third mode of operation associated with a third (pre-existing) device type in response to the link budget requirement not exceeding the specified value, or the QoS requirements being sensitive and a downlink throughput requirement exceeding a specified throughput value.
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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
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.
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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
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.
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