公开(公告)号：US20160095020A1

公开(公告)日：2016-03-31

申请号：US14503087

申请日：2014-09-30

Applicant: Apple Inc.

Inventor： Swaminathan Balakrishnan ,  Sarma V. Vangala

IPC: H04W36/00

CPC classification number: H04W36/0022 ,  H04W8/22 ,  H04W36/0083 ,  H04W48/18 ,  H04W60/00

Abstract: A user equipment (“UE”) that performs methods to connect to multiple radio access networks (RAN) including a home network RANs and roaming RANs to perform communications. An exemplary method performed by a UE initially connected to a Long Term Evolution radio access network (LTE-RAN) of a home network and registered with a voice over LTE (VoLTE) service of the home network to perform voice communications via the LTE-RAN, includes detecting a service disrupting event preventing VoLTE communication with the LTE-RAN, deregistering from the VoLTE service of the home network, scanning for available bands in the LTE-RAN of the home network and while scanning for the available bands in the LTE-RAN of the home network, connecting to a further radio access network (RAN) of the home network that allows circuit-switched communications with the home network, wherein the UE performs voice communications as circuit-switched communications via the further RAN.

Abstract translation: 执行连接到包括归属网络RAN和漫游RAN的多个无线电接入网络（RAN）以执行通信的方法的用户设备（“UE”）。 由UE首先连接到家庭网络的长期演进无线电接入网（LTE-RAN）并且通过LTE家庭网络的LTE（VoLTE）业务登记的语音执行的示例性方法，以经由LTE-RAN进行语音通信 检测与LTE-RAN进行VoLTE通信的业务中断事件，从家庭网络的VoLTE业务注销，对家庭网络的LTE-RAN中的可用频带进行扫描，同时扫描LTE- RAN，其连接到允许与家庭网络的电路交换通信的家庭网络的另一无线电接入网络（RAN），其中，UE经由另外的RAN执行语音通信作为电路交换通信。

公开(公告)号：US20160073331A1

公开(公告)日：2016-03-10

申请号：US14844241

申请日：2015-09-03

Applicant: Apple Inc.

Inventor： Swaminathan Balakrishnan ,  Sindhu Sivasankaran Nair ,  Tarik Tabet ,  Sarma V. Vangala

IPC: H04W48/16 ,  H04L12/66 ,  H04W4/02

CPC classification number: H04L12/66 ,  H04L12/6418

Abstract: Instead of barring an LTE network for the Long Bar Time duration (LBT) if the LTE cell doesn't support CSFB, a wireless communication device may perform a scan for LTE networks before expiration of the LBT if the UE has changed its location. When the UE is in LTE acquisition mode, or the necessary information about a CS network for CSFB is unavailable, the UE may maintain its state on both the LTE and CS network, and check CS paging messages to see if the UE can decode any status. Unlike for CSFB, checking for overhead messages may be performed over the LTE system, and the UE may wake up on CS pages to determine if a suitable network is available. By maintaining its state on both types of networks, the UE may use LTE for data services which would otherwise be provided by different systems for the CS networks when messages transmitted over LTE do not include CS registration information.

Abstract translation: 如果LTE小区不支持CSFB，则不是将LTE网络限制在长时间段时间长度（LBT），如果UE改变了其位置，则无线通信设备可以在LBT到期之前对LTE网络执行扫描。 当UE处于LTE获取模式时，或者关于CSFB的CS网络的必要信息不可用时，UE可以在LTE和CS网络上保持其状态，并检查CS寻呼消息以查看UE是否可以解码任何状态 。 与CSFB不同，可以通过LTE系统执行开销消息的检查，并且UE可以在CS页面上唤醒以确定合适的网络是否可用。 通过在两种类型的网络上维持其状态，当LTE发送的消息不包括CS注册信息时，UE可以使用LTE用于数据业务，否则这些数据业务将由CS网络的不同系统提供。

公开(公告)号：US09179355B2

公开(公告)日：2015-11-03

申请号：US14150928

申请日：2014-01-09

Applicant: Apple Inc.

Inventor： Tarik Tabet ,  Sarma V Vangala ,  Samy Khay-Ibbat ,  Swaminathan Balakrishnan ,  Ajoy K Singh ,  Sree Ram Kodali ,  Rafael Rivera-Barreto ,  S Aon Mujtaba ,  Faraz Faheem ,  Sreevalsan Vallath

IPC: H04M11/00 ,  H04W28/02 ,  H04W24/08 ,  H04W28/08 ,  H04W72/04 ,  H04W88/02

CPC classification number: H04W24/08 ,  H04L43/0888 ,  H04L43/16 ,  H04W28/0236 ,  H04W28/0284 ,  H04W28/08 ,  H04W36/04 ,  H04W72/0486 ,  H04W72/085 ,  H04W88/02

Abstract: Estimating loading and potential available throughput a serving cell of a wireless user equipment (UE) device. Physical layer metrics of a channel on which the UE communicates with the serving cell may be measured. Cell utilization of the serving cell may be calculated based at least in part on the measured physical layer metrics. A maximum available throughput of the serving cell may be calculated based on the cell utilization.

Abstract translation: 估计无线用户设备（UE）设备的服务小区的负载和潜在可用吞吐量。 可以测量UE与服务小区通信的信道的物理层度量。 可以至少部分地基于所测量的物理层度量来计算服务小区的小区利用率。 可以基于小区利用率来计算服务小区的最大可用吞吐量。

公开(公告)号：US20140098693A1

公开(公告)日：2014-04-10

申请号：US14049894

申请日：2013-10-09

Applicant: Apple, Inc.

Inventor： Tarik Tabet ,  Sarma V. Vangala ,  Sreevalsan Vallath ,  Swaminathan Balakrishnan

IPC: H04W36/00

CPC classification number: H04W36/0083 ,  H04W36/06 ,  H04W36/30 ,  H04W52/14 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/166 ,  Y02D70/23

Abstract: A method for triggering cell transition in an uplink power limited condition is disclosed. The method can include a wireless communication device determining that the wireless communication device is experiencing an uplink power limited condition; deriving a modified downlink channel quality measurement by adjusting a measured downlink channel quality to indicate a lower downlink channel quality than the measured downlink channel quality; generating a measurement report including the modified downlink channel quality measurement; and sending the measurement report to the serving cell to trigger transition of the wireless communication device from the serving cell to a second cell.

Abstract translation: 公开了一种在上行链路功率限制条件下触发小区转换的方法。 该方法可以包括确定无线通信设备正在经历上行链路功率限制条件的无线通信设备; 通过调整测量的下行链路信道质量以指示比所测量的下行链路信道质量低的下行链路信道质量来导出修改的下行链路信道质量测量; 生成包括修改的下行链路信道质量测量的测量报告; 以及将所述测量报告发送到所述服务小区以触发所述无线通信设备从所述服务小区到第二小区的转换。

公开(公告)号：US12010667B2

公开(公告)日：2024-06-11

申请号：US17250886

申请日：2018-09-20

Applicant: Apple Inc.

Inventor： Swaminathan Balakrishnan ,  Haijing Hu ,  Sreevalsan Vallath ,  Prateek Sharma ,  Cesar Perez ,  Adesh Kumar ,  Deepankar Bhattacharjee ,  Vijay Venkataraman

IPC: H04W72/0453 ,  H04L5/00 ,  H04W72/51

CPC classification number: H04W72/0453 ,  H04L5/0092 ,  H04W72/51

Abstract: A user equipment (UE) is configured with a carrier aggregation (CA) functionality and UE connected to a network via a base station that serves as a primary serving cell (PCell) providing a primary component carrier (PCC) to the UE. The UE determines a plurality of bands that are supported by the UE for use in the CA functionality, generates an individual band information element (IE) including band information for the bands, determines at least one representative CA combination having an order, the order indicating a total number of component carriers (CCs), the at least one representative CA combination forming a basis to extrapolate a plurality of CA combinations having the order based on the band information, generates a representative CA combination IE including the at least one representative CA combination and transmits the individual band IE and the representative CA combination IE to the base station.

公开(公告)号：US11432313B2

公开(公告)日：2022-08-30

申请号：US16888555

申请日：2020-05-29

Applicant: Apple Inc.

Inventor： Ioannis Pefkianakis ,  Madhusudan Chaudhary ,  Swaminathan Balakrishnan ,  Muthukumaran Dhanapal ,  Lakshmi Kavuri ,  Thanigaivelu Elangovan ,  Ajoy K. Singh ,  Deepankar Bhattacharjee ,  Gaurav Pathak ,  Carola Faronius ,  Franco Travostino ,  Raghuveer Mallikarjun ,  Harshit Chuttani ,  Sreevalsan Vallath ,  Rajesh Ambati

IPC: H04W72/12 ,  H04W72/04 ,  H04L5/00 ,  H04W28/02 ,  H04L43/0882 ,  H04W16/10

Abstract: A system and method for operation of a user equipment (UE) to determine a cellular network bottleneck in a downlink channel, and an apparatus for use in a UE for determining the same. A UE may determine a burst of network traffic from network traffic received from the cellular network during a series of transmission time intervals. The UE may analyze resource allocations to the UE during the burst to determine an extent to which the cellular network is busy. The UE may determine that the cellular network is experiencing a bottleneck based at least in part on the analysis of the resource allocations to the UE in the burst.

公开(公告)号：US10681643B2

公开(公告)日：2020-06-09

申请号：US16442730

申请日：2019-06-17

Applicant: Apple Inc.

Inventor： Tianyan Pu ,  Sai Sravan Bharadwaj Karri ,  Wei Zhang ,  Swaminathan Balakrishnan ,  Xiantao Sun ,  Beibei Wang ,  Manish G. Vemulapalli ,  Jia Tang ,  Sami M. Almalfouh ,  Zhu Ji ,  Sachin J. Sane

IPC: H04W52/02 ,  H04B7/0456 ,  H04B7/08 ,  H04W88/06

Abstract: This disclosure relates to techniques for opportunistically depowering receiver chains of a wireless device. Based on control information, a device may determine whether the current number of active receiver chains can be reduced while maintaining a target achievable code rate for a period of data reception associated with the control information. Additionally, the device may generate and use a lookup table to determine whether to depower receiver chains, and which receiver chains to depower.

公开(公告)号：US10667158B2

公开(公告)日：2020-05-26

申请号：US16229957

申请日：2018-12-21

Applicant: Apple Inc.

Inventor： Sami M. Almalfouh ,  Li Su ,  Sai Sravan Bharadwaj Karri ,  Chiranjeevi M. Kosuri ,  Karthik Chockalingam ,  Swaminathan Balakrishnan

IPC: H04W24/08 ,  H04W76/10 ,  H04B17/336 ,  H04W56/00

Abstract: This disclosure relates to radio link monitoring techniques. According to some embodiments, a wireless device may establish a radio link with a cellular base station according to a radio access technology. The base station may provide reference signals, control signals, and data signals to the wireless device via the radio link. The wireless device may perform radio link monitoring of the radio link using characteristics of decoding performance for one or more of the control signals and the data signals. Performing radio link monitoring of the radio link may include determining whether the radio link is in-sync or out-of-sync and determining whether radio link failure has occurred.

公开(公告)号：US20190124592A1

公开(公告)日：2019-04-25

申请号：US16119801

申请日：2018-08-31

Applicant: Apple Inc.

Inventor： Tianyan Pu ,  Sai Sravan Bharadwaj Karri ,  Wei Zhang ,  Swaminathan Balakrishnan ,  Xiantao Sun ,  Beibei Wang ,  Manish G. Vemulapalli ,  Jia Tang ,  Sami M. Almalfouh ,  Zhu Ji ,  Sachin J. Sane

IPC: H04W52/02 ,  H04B7/0456

CPC classification number: H04W52/028 ,  H04B7/0456 ,  H04W52/0206 ,  H04W88/06

Abstract: This disclosure relates to techniques for opportunistically depowering receiver chains of a wireless device. Based on control information, a device may determine whether the current number of active receiver chains can be reduced while maintaining a target achievable code rate for a period of data reception associated with the control information. Additionally, the device may generate and use a lookup table to determine whether to depower receiver chains, and which receiver chains to depower.

公开(公告)号：US09949153B2

公开(公告)日：2018-04-17

申请号：US14870266

申请日：2015-09-30

Applicant: Apple Inc.

Inventor： Tarik Tabet ,  Sarma V. Vangala ,  Samy Khay-Ibbat ,  Swaminathan Balakrishnan ,  Ajoy K. Singh ,  Sree Ram Kodali ,  Rafael L. Rivera-Barreto ,  Syed Aon Mujtaba ,  Faraz Faheem ,  Sreevalsan Vallath

IPC: H04W4/00 ,  H04W24/08 ,  H04W28/02 ,  H04W28/08 ,  H04W72/04 ,  H04W36/04 ,  H04W72/08 ,  H04L12/26 ,  H04W88/02

CPC classification number: H04W24/08 ,  H04L43/0888 ,  H04L43/16 ,  H04W28/0236 ,  H04W28/0284 ,  H04W28/08 ,  H04W36/04 ,  H04W72/0486 ,  H04W72/085 ,  H04W88/02

Abstract: Estimating loading and potential available throughput a serving cell of a wireless user equipment (UE) device. Physical layer metrics of a channel on which the UE communicates with the serving cell may be measured. Cell utilization of the serving cell may be calculated based at least in part on the measured physical layer metrics. A maximum available throughput of the serving cell may be calculated based on the cell utilization.