公开(公告)号：US20200305081A1

公开(公告)日：2020-09-24

申请号：US16893039

申请日：2020-06-04

Applicant: Apple Inc.

Inventor： Moustafa M. Elsayed ,  Tarik Tabet

IPC: H04W52/02

Abstract: A wireless communication device (UE) may include a paging subsystem that performs paging-monitoring as part of wireless communications of the wireless communication device. The UE may place wireless communication system resources not required during paging-monitoring into either a low-power state or a power-down state, and those system resources may remain in one of those respective states during paging-monitoring. The wireless communication system resources not required during the paging-monitoring may include at least a wireless communications protocol stack used during the wireless communications of the UE, and at least system resources used for performing uplink related tasks independently of wireless communication system resources used for performing downlink related tasks. The paging subsystem may include at least a control manager subsystem capable of decoding a physical downlink control channel, a downlink control subsystem capable of performing tasks related to a physical downlink data channel, and a message parser for parsing paging messages.

公开(公告)号：US10693623B2

公开(公告)日：2020-06-23

申请号：US14496949

申请日：2014-09-25

Applicant: Apple Inc.

Inventor： Tarik Tabet ,  Farouk Belghoul ,  S. Aon Mujtaba ,  Dawei Zhang

IPC: H04J3/06 ,  H04L7/00 ,  H04L5/00 ,  H04L12/26

Abstract: This disclosure relates to using a dedicated reference subframes in a cellular communication system. According to one embodiment, a base station may transmit reference signals in a dedicated synchronization and measurement reference subframe. Neighboring base stations may also transmit reference signals in dedicated reference subframes in a temporally coordinated (synchronized) manner. The reference signals transmitted be each base station may be orthogonal with the reference signals transmitted by each neighboring base station. The reference subframes may be transmitted periodically, and data subframes may be transmitted between reference subframes. Some or all of the data subframes may not include cell-specific reference symbols, as their function may be unnecessary given the use of the dedicated reference subframes.

公开(公告)号：US10660110B2

公开(公告)日：2020-05-19

申请号：US15496388

申请日：2017-04-25

Applicant: Apple Inc.

Inventor： Tarik Tabet ,  Samy Khay-Ibbat ,  Krisztian Kiss ,  Rafael L. Rivera-Barreto ,  Cesar Perez ,  Moustafa M. Elsayed ,  Prashant H. Vashi

IPC: H04W72/08 ,  H04W72/04

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 additional optimization requirements. The new device category may identify the UE device as a wearable device. According to some embodiments, LTE category M may be extended to support non-MTC operations performed by wearable devices. For example, the new device category may support UE mobility and may disallow access barring. Additional extensions may be implemented in response to an indication by the UE that the UE is implementing a specific application, such as VoLTE or a near real-time application, such as audio streaming. In some scenarios, the indication may include the UE indicating a specific QCI value. In some scenarios, the indication may include the UE attaching to a specific APN.

公开(公告)号：US10609615B2

公开(公告)日：2020-03-31

申请号：US15933837

申请日：2018-03-23

Applicant: Apple Inc.

Inventor： Farouk Belghoul ,  Tarik Tabet ,  Dawei Zhang

IPC: H04W36/22 ,  H04W36/14 ,  H04W36/32 ,  H04W36/00 ,  H04W84/04 ,  H04W84/12 ,  H04W88/06

Abstract: In at least some embodiments, a method, apparatus, and system for performing communication using a plurality of radio access technologies (RATs) including a cellular RAT and a short-range RAT. A mobile device may be configured to receive information regarding traffic steering, i.e., cellular/short-range RAT handover, from nearby short-range access points and/or from a cellular base station. The mobile device may generate or determine mobility information of the mobile device, which indicates an amount of movement of the mobile device. The mobile device may determine whether the mobile device should transition between the cellular RAT and the short-range RAT based at least in part on the traffic-steering information and the mobility information. The mobile device may selectively transition between the cellular RAT and the short-range RAT based on the determination.

公开(公告)号：US10588086B1

公开(公告)日：2020-03-10

申请号：US16217357

申请日：2018-12-12

Applicant: Apple Inc.

Inventor： Sanjeevi Balasubramanian ,  Shiva Krishna Narra ,  Anjaneyulu Maganti ,  Tarik Tabet ,  Lydi Smaini ,  Dhruv Khati ,  Mohit Narang ,  Tiberiu Muresan

IPC: H04W52/02 ,  H04M1/73

Abstract: In a method of device-to-device communication, efficient power management is provided when a primary device has a low battery level. The primary device can send synchronization signals and discovery messages to secondary devices by looping through a sequence of transmit power values in a sequence of consecutive frames, where the sequence of transmitting values includes a default power value and a reduced power value.

公开(公告)号：US20200059988A1

公开(公告)日：2020-02-20

申请号：US16663437

申请日：2019-10-25

Applicant: Apple Inc.

Inventor： Tarik Tabet ,  Ajoy K. Singh ,  Sarma V. Vangala ,  Vinay R. Majjigi ,  Samy Khay-Ibbat

IPC: H04W76/28

Abstract: This disclosure relates to techniques for adaptive C-DRX Management. A wireless device and a cellular base station may establish a cellular link. According to some embodiments, the base station may monitor upcoming traffic with the wireless device. Based at least in part on the upcoming traffic for the wireless device, the base station may provide a command indicating to the wireless device to enter C-DRX. The command may further indicate to the wireless device a number of C-DRX cycles through which to remain in a low power state.

公开(公告)号：US20200023413A1

公开(公告)日：2020-01-23

申请号：US16587200

申请日：2019-09-30

Applicant: Apple Inc.

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

IPC: B08B3/08 ,  H04W16/14 ,  H04W28/08 ,  H04W72/04 ,  B08B3/02 ,  B08B3/04 ,  F16H57/01 ,  G01N27/90 ,  H04W72/12

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.

公开(公告)号：US10542535B2

公开(公告)日：2020-01-21

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 ,  H04W48/12

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：US20200015169A1

公开(公告)日：2020-01-09

申请号：US16169013

申请日：2018-10-24

Applicant: Apple Inc.

Inventor： Anjaneyulu Maganti ,  Dhruv Khati ,  Lydi Smaini ,  Sanjeevi Balasubramanian ,  Shiva Krishna Narra ,  Tarik Tabet ,  Mohit Narang ,  Tiberiu Muresan

IPC: H04W52/02 ,  H04W4/90 ,  H04W4/70

Abstract: This disclosure relates to techniques and devices for implementing an emergency power save mode (EPSM) in a user equipment device (UE). A UE may enter the EPSM in response to user input. While operating in the EPSM, the UE may power down a display of the UE to preserve battery life and may broadcast an emergency beacon in response to user input to a hardware button of the UE, such as a volume button. The UE may supply sound or haptic feedback in response to broadcasting the emergency beacon.

公开(公告)号：US20200014432A1

公开(公告)日：2020-01-09

申请号：US16451494

申请日：2019-06-25

Applicant: Apple Inc.

Inventor： Sai Sravan Bharadwaj Karri ,  Swaminathan Balakrishnan ,  Tarik Tabet

IPC: H04B7/0456 ,  H04B7/06

Abstract: This disclosure relates to performing grouped MIMO communications in a cellular communication system. A cellular base station may select a precoding matrix for transmitting a downlink signal to a wireless device via a MIMO channel. The selected precoding matrix may have unequal weights for different MIMO subchannels. The downlink signal may be precoded using the selected precoding matrix. The precoded downlink signal may be transmitted to the wireless device via the MIMO channel. The wireless device may receive and decode the downlink signal.