公开(公告)号：US20140146763A1

公开(公告)日：2014-05-29

申请号：US14086414

申请日：2013-11-21

Applicant: Apple Inc.

Inventor： Samy Khay-Ibbat ,  Navid Damji ,  Sreevalsan Vallath ,  Sarma V. Vangala ,  Johnson O Sebeni

IPC: H04W72/08

CPC classification number: H04W28/0268 ,  H04W72/1236

Abstract: QoS based uplink data buffering while TTI bundling is enabled by a wireless user equipment (UE) device. The UE may establish a packet-switched connection with a network via a wireless link. The UE may receive, at a media access control (MAC) layer, an indication to enable TTI bundling. The UE may selectively buffer uplink data at an application layer based on the indication to enable TTI bundling. The uplink data may be buffered selectively based on Quality of Service (QoS) considerations. Uplink transmissions may subsequently be performed using TTI bundling.

Abstract translation: 基于QoS的上行链路数据缓冲，而TTI绑定由无线用户设备（UE）设备启用。 UE可以经由无线链路与网络建立分组交换连接。 在媒体接入控制（MAC）层，UE可以接收启用TTI绑定的指示。 基于用于启用TTI绑定的指示，UE可以选择性地缓冲应用层上的上行链路数据。 可以基于服务质量（QoS）考虑来选择性地缓冲上行链路数据。 随后可以使用TTI捆绑来执行上行链路传输。

公开(公告)号：US11558894B2

公开(公告)日：2023-01-17

申请号：US15015613

申请日：2016-02-04

Applicant: Apple Inc.

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

IPC: H04W72/14 ,  H04W72/12

Abstract: Embodiments described herein relate to an apparatus, system, and method for providing aperiodic uplink grants to a UE for aperiodic communications from the UE to a base station. In some embodiments, the UE may be configured to communicate information to the base station, which may be useable by the base station to determine an uplink grant schedule for subsequent communications between the base station and the UE. This uplink grant schedule may be aperiodic, i.e., the uplink grants may be issued at non-uniform intervals of time. The UE may receive the uplink grants from the base station according to the uplink grant schedule. The UE may transmit uplink communications to the base station in response to the received uplink grants.

公开(公告)号：US11089502B2

公开(公告)日：2021-08-10

申请号：US16658931

申请日：2019-10-21

Applicant: Apple Inc.

Inventor： Samy Khay-Ibbat ,  Tarik Tabet

IPC: H04W4/00 ,  H04W28/02 ,  H04W36/00 ,  H04W36/30 ,  H04L12/805 ,  H04M1/253 ,  H04W28/14

Abstract: A user equipment (UE) and associated method performs a voice call with a network, including exchanging voice packets, determines an uplink data transmission to be performed concurrently with the voice call and stores the uplink data transmission in a buffer. A base station and associated method performs a voice call with a UE, determines a downlink data transmission for the UE is to be performed concurrently with the voice call and stores the downlink data transmission in a buffer when the UE is a predetermined type. A UE and associated method associates with a first access point (AP), determines first performance characteristics of a connection with the first AP, determines second performance characteristics of a potential connection with a second AP, declares a radio link failure when the second performance characteristics exceed the first performance characteristics to trigger a handover procedure from the first AP to the second AP.

公开(公告)号：US10652788B2

公开(公告)日：2020-05-12

申请号：US16037788

申请日：2018-07-17

Applicant: Apple Inc.

Inventor： Tarik Tabet ,  Farouk Belghoul ,  Samy Khay-Ibbat ,  Sarma V. Vangala ,  Rafael L. Rivera-Barreto ,  David Boettger ,  Awais M. Hussain ,  Syed Aon Mujtaba

IPC: H04W36/00 ,  H04B17/336 ,  H04B17/382

Abstract: This disclosure relates to techniques for a link budget limited UE to improve communications performance with a cellular network. The UE may perform signal to interference noise ratio (SINR) measurements and use these measurements to adjust a received signal power value that is provided to the cellular network as a received signal power measurement. The UE may generate the received signal power value based at least in part on the SINR measurement in order to reduce the likelihood of handover when the UE has good SINR but poor received signal power. The UE may also provide preferred configuration information to the base station which enhances the performance of the UE when link budget limited. The configuration information may specify one or more parameter values designed to provide improved performance for a link budget limited device.

公开(公告)号：US10581583B2

公开(公告)日：2020-03-03

申请号：US14503202

申请日：2014-09-30

Applicant: Apple Inc.

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

IPC: H04L5/14 ,  H04L5/00 ,  H04W36/00 ,  H04W76/10 ,  H04W48/18 ,  H04W88/06

Abstract: This application discloses various techniques for call establishment using voice-over LTE (VoLTE) in networks supporting time division (TD) and frequency division duplexed (FDD) LTE communication systems. Such techniques can include systems and methods for mobile-originated calls for a UE in a TD-LTE cell, systems and methods for mobile-terminated calls for a connected UE in a TD-LTE cell and systems and methods for mobile-terminated calls for an idle UE in a TD-LTE cell. These methods and systems can leverage component carriers from a carrier aggregating capable UE to facilitate more efficient and/or effective UE call establishment.

公开(公告)号：US20200053589A1

公开(公告)日：2020-02-13

申请号：US16658931

申请日：2019-10-21

Applicant: Apple Inc.

Inventor： Samy Khay-Ibbat ,  Tarik Tabet

IPC: H04W28/02 ,  H04W36/00

Abstract: A user equipment (UE) and associated method performs a voice call with a network, including exchanging voice packets, determines an uplink data transmission to be performed concurrently with the voice call and stores the uplink data transmission in a buffer. A base station and associated method performs a voice call with a UE, determines a downlink data transmission for the UE is to be performed concurrently with the voice call and stores the downlink data transmission in a buffer when the UE is a predetermined type. A UE and associated method associates with a first access point (AP), determines first performance characteristics of a connection with the first AP, determines second performance characteristics of a potential connection with a second AP, declares a radio link failure when the second performance characteristics exceed the first performance characteristics to trigger a handover procedure from the first AP to the second AP.

公开(公告)号：US20190327688A1

公开(公告)日：2019-10-24

申请号：US16458250

申请日：2019-07-01

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

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：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：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：US09961007B2

公开(公告)日：2018-05-01

申请号：US15012680

申请日：2016-02-01

Applicant: Apple Inc.

Inventor： Samy Khay-Ibbat ,  Sarma V. Vangala ,  Sreevalsan Vallath ,  Tarik Tabet

IPC: H04L12/811 ,  H04L29/06 ,  H04W24/08 ,  H04W28/02

CPC classification number: H04L47/38 ,  H04L65/601 ,  H04L65/602 ,  H04L65/604 ,  H04L65/608 ,  H04L65/80 ,  H04W24/08 ,  H04W28/0236

Abstract: A method for initiating a codec rate change during a VoIP call by a wireless communication device is disclosed. The method can include the wireless communication device establishing a first codec rate for use in the VoIP call during a call establishment phase; using the first codec rate to encode voice data for transmission during a first portion of the VoIP call; determining a channel quality while using the first codec rate; determining that the channel quality satisfies a threshold for requesting a codec rate change; requesting a codec rate change from the first codec rate to a second codec rate in response to the channel quality satisfying the threshold; and using the second codec rate to encode voice data for transmission during a second portion of the VoIP call.