公开(公告)号：US11039417B2

公开(公告)日：2021-06-15

申请号：US16665069

申请日：2019-10-28

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：US10993279B2

公开(公告)日：2021-04-27

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：US20210028835A1

公开(公告)日：2021-01-28

申请号：US17068102

申请日：2020-10-12

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.

公开(公告)号：US10813046B2

公开(公告)日：2020-10-20

申请号：US15933494

申请日：2018-03-23

Applicant: Apple Inc.

Inventor： Konstantinos Sarrigeorgidis ,  Tarik Tabet ,  Moustafa M. Elsayed

IPC: H04B1/04 ,  H04B1/12 ,  H04W52/02 ,  H04B1/10 ,  H04B1/00 ,  H04B1/525

Abstract: A wireless user equipment (UE) device may include a receiver and transmitter. The UE device may dynamically vary the fidelity requirements imposed on the analog signal processing performed by the receiver and/or the transmitter in response factors such as: amount of signal interference (e.g., out-of-band signal power); modulation and coding scheme; number of spatial streams; extent of transmitter leakage; and size and/or frequency location of resources allocated to the UE device. Thus, the UE device may consume less power on average than a UE device that is designed to satisfy fixed fidelity requirements associated with a worst case reception scenario and/or a worst case transmission scenario.

公开(公告)号：US20200154417A1

公开(公告)日：2020-05-14

申请号：US16711682

申请日：2019-12-12

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 (MB) 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：US20200100082A1

公开(公告)日：2020-03-26

申请号：US16217361

申请日：2018-12-12

Applicant: Apple Inc.

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

IPC: H04W4/90 ,  H04W4/12 ,  H04L5/00 ,  H04L1/00 ,  H04W52/02 ,  H04W4/70 ,  H04W72/04 ,  H04W56/00

Abstract: In a method of device-to-device communication, a user device initially sends an emergency message repeatedly at a first repeating frequency. When a specified number acknowledgement (ACK) messages are received, the user device sends the emergency message repeatedly at a reduced repeating frequency. The repeating frequency may be further reduced when more ACK messages are received.

公开(公告)号：US20200076654A1

公开(公告)日：2020-03-05

申请号：US16676721

申请日：2019-11-07

Applicant: Apple Inc.

Inventor： Konstantinos Sarrigeorgidis ,  Tarik Tabet ,  Lydi Smaini

IPC: H04L25/06 ,  H04B1/30

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.

公开(公告)号：US10560883B2

公开(公告)日：2020-02-11

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 ,  H04W84/04 ,  H04W24/10 ,  H04W36/38 ,  H04W72/04 ,  H04W72/08

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：US10440765B2

公开(公告)日：2019-10-08

申请号：US14862735

申请日：2015-09-23

Applicant: Apple Inc.

Inventor： Farouk Belghoul ,  Tarik Tabet ,  Dawei Zhang

IPC: H04W76/15 ,  H04W28/08 ,  H04W28/02 ,  H04W36/28 ,  H04W36/14 ,  H04W84/12 ,  H04W88/06 ,  H04W76/16

Abstract: This disclosure relates to aggregation of radio resources provided according to multiple radio interfaces. According to some embodiments, a base station may establish a radio bearer with a wireless user equipment (UE) device. The radio bearer may initially utilize a first radio interface between the base station and the UE. The base station may receive an indication to aggregate radio resources of an access point that utilizes a second radio interface for the UE. Based on the indication to aggregate radio resources for the UE, the base station may redirect at least a portion of data of the radio bearer by way of the access point to be exchanged with the UE using the second radio interface.

公开(公告)号：US10440593B2

公开(公告)日：2019-10-08

申请号：US16414377

申请日：2019-05-16

Applicant: Apple Inc.

Inventor： Francisco J. Gonzalez ,  Rafael L. Rivera-Barreto ,  Rohan C. Malthankar ,  Sarma V. Vangala ,  Tarik Tabet

IPC: H04W24/02 ,  H04W76/10 ,  H04W8/04 ,  H04W28/18 ,  H04L29/08 ,  H04B1/3827 ,  H04W74/00 ,  H04W88/06

Abstract: System and methods for providing special radio provisions to link budget limited devices. Before establishing a cellular connection with a cellular network, a user equipment device (UE), such as a link budget limited UE, may negotiate the special radio provisions with the network by presenting requested profile information to the network, and receiving back approved profile information from the network. The UE may perform these communications either directly, via a non-cellular communication connection with the network, or indirectly, via a companion or proxy device. When the UE initiates a cellular connection with the network, both entities may use information specified in the approved profile information, which may improve efficiency of the connection. In some scenarios, the approved profile information may identify a class of devices to which the UE belongs. The approved profile information may also be used in establishing connections with other devices of the same class.