公开(公告)号：US10952147B2

公开(公告)日：2021-03-16

申请号：US16869380

申请日：2020-05-07

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：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.

公开(公告)号：US09775086B2

公开(公告)日：2017-09-26

申请号：US14320013

申请日：2014-06-30

Applicant: APPLE INC.

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

IPC: H04W4/00 ,  H04W36/22 ,  H04W36/14 ,  H04W84/12

CPC classification number: H04W36/22 ,  H04W36/14 ,  H04W84/12

Abstract: A device and method performs a handover. The method includes establishing a connection to a cellular network. The method includes determining whether a WiFi network is available for connection. The method includes determining performance data of the WiFi network based upon network metrics. The method includes determining a quality of service (QoS) parameter associated with a currently executed application, the QoS parameter being indicative of whether a handover from the cellular network to the WiFi network is permitted. The method includes performing the handover from the cellular network to the WiFi network when the performance data of the WiFi network satisfies a set of predetermined criteria for the network metrics and the QoS parameter indicates the handover is permitted.

公开(公告)号：US09615377B2

公开(公告)日：2017-04-04

申请号：US14725764

申请日：2015-05-29

Applicant: APPLE INC.

Inventor： Swaminathan Balakrishnan ,  Sarma V. Vangala ,  Sreevalsan Vallath ,  Prateek Sharma

IPC: H04W72/00 ,  H04W72/10 ,  H04W72/04 ,  H04W48/14

CPC classification number: H04W72/10 ,  H04W48/14 ,  H04W48/18 ,  H04W72/0453

Abstract: Described herein are systems and methods for prioritizing frequency selection of a user equipment (“UE”) having a transceiver configured to enable the UE to establish a connection with a network using at least two communication protocols. A method may comprise recording, at the UE, a camped frequency and a camped band with which the UE is communicating with the first network in the first protocol, disconnecting from the first network and connecting to the second network, and disconnecting from the second network and reconnecting to the first network, wherein the reconnecting to the first network includes determining whether one of the camped frequency or a different frequency within the camped band is available for reconnection to the first network, and reconnecting to the first network using the one of the camped frequency or the different frequency within the camped band.

公开(公告)号：US20170064610A1

公开(公告)日：2017-03-02

申请号：US15016651

申请日：2016-02-05

Applicant: Apple Inc.

Inventor： Sarma V. Vangala ,  Tarik Tabet ,  Swaminathan Balakrishnan ,  Deepankar Bhattacharjee ,  Xiantao Sun

IPC: H04W48/10

CPC classification number: H04W48/10 ,  H04W84/042

Abstract: This disclosure relates to techniques for enabling a cellular network to more efficiently announce special network capabilities to UE's in its coverage area. The special network capabilities may be specific to a first class of UE devices and/or may be outside of the relevant telecommunication standard used by the cellular network. The base station may transmit a dummy System Information Block-1 (SIB-1), wherein the dummy system information block is broadcast separately from regular system information block 1's (SIB-1's).

Abstract translation: 本公开涉及使蜂窝网络能够更有效地向其覆盖区域中的UE公布特定网络能力的技术。 特殊网络能力可以是特定于第一类UE设备和/或可能在蜂窝网络使用的相关电信标准之外。 基站可以发送伪系统信息块-1（SIB-1），其中虚拟系统信息块与常规系统信息块1（SIB-1）分开广播。

公开(公告)号：US09451497B2

公开(公告)日：2016-09-20

申请号：US13966203

申请日：2013-08-13

Applicant: Apple Inc.

Inventor： Sarma V. Vangala ,  Sreevalsan Vallath ,  Swaminathan Balakrishnan ,  Vikram Bhaskara Yerrabommanahalli

IPC: H04W4/00 ,  H04W28/02 ,  H04L12/801 ,  H04L12/807

CPC classification number: H04W28/0273 ,  H04L47/193 ,  H04L47/27

Abstract: A method for reducing packet loss during data transfer from a network to a wireless communication device over a connection is disclosed. The method can include the wireless communication device signaling a first receive window size for a data transfer; determining occurrence of an event resulting in an interruption of the connection; and, in response to determining occurrence of the event, signaling a second receive window size for the data transfer prior to the event to trigger an adjustment of a data rate of the data transfer in preparation for the event.

Abstract translation: 公开了一种在通过连接从网络到无线通信设备的数据传输期间减少分组丢失的方法。 该方法可以包括无线通信设备用信号通知用于数据传送的第一接收窗口大小; 确定导致连接中断的事件的发生; 并且响应于确定事件的发生，在事件之前发信号通知数据传输的第二接收窗口大小以触发数据传输的数据速率的调整以准备该事件。

公开(公告)号：US09307467B2

公开(公告)日：2016-04-05

申请号：US14012934

申请日：2013-08-28

Applicant: Apple Inc.

Inventor： Swaminathan Balakrishnan ,  Sarma V. Vangala ,  Wanping Zhang ,  Tahir Shamim ,  Sreevalsan Vallath

IPC: H04W36/14 ,  H04W48/18

CPC classification number: H04W36/14 ,  H04W48/18 ,  Y02D70/00 ,  Y02D70/122 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/23 ,  Y02D70/24

Abstract: A network reselection procedure, of a wireless communication device, that occurs following a network detachment event, such as a device sleep event or a device power savings mode event. The wireless communication device attempts to acquire a first wireless network to which the wireless communication device was most recently attached, immediately preceding the network detachment event. Then, in response to an unsuccessful acquisition of the first wireless network, the wireless communication device attempts an alternate network acquisition utilizing a Most Recently Used List (MRUL) that is stored at the wireless communication device and includes information about one or more frequency bands allocated to a primary service provider with which the wireless communication device is affiliated. After determining whether the alternate network acquisition attempt was successful, the wireless communication device attaches to a second network and stores information associated with the second network.

Abstract translation: 在网络分离事件之后发生的无线通信设备的网络重选过程，诸如设备睡眠事件或设备省电模式事件。 无线通信设备在网络分离事件之前尝试获取无线通信设备最近附接到的第一无线网络。 然后，响应于对第一无线网络的不成功的获取，无线通信设备尝试使用存储在无线通信设备处的最近使用列表（MRUL）进行备用网络捕获，并且包括关于分配的一个或多个频带的信息 到无线通信设备附属于的主要服务提供商。 在确定备用网络获取尝试是否成功之后，无线通信设备连接到第二网络并存储与第二网络相关联的信息。

公开(公告)号：US20160021557A1

公开(公告)日：2016-01-21

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: H04W24/08 ,  H04W36/04 ,  H04W72/08

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.

公开(公告)号：US20150172987A1

公开(公告)日：2015-06-18

申请号：US14503220

申请日：2014-09-30

Applicant: Apple Inc.

Inventor： Swaminathan Balakrishnan ,  Samy Khay-Ibbat ,  Sarma V. Vangala ,  Tarik Tabet ,  Rafael L. Rivera-Barreto ,  Sree Ram Kodali ,  Sai Sravan Bharadwaj Karri

IPC: H04W36/24

CPC classification number: H04W36/24 ,  H04L5/001 ,  H04L5/0035 ,  H04L5/0098 ,  H04W36/0088 ,  H04W36/06

Abstract: A user equipment (UE) configured to connect to a network and operate in a carrier aggregation mode and a single carrier mode performs methods to select optimal component carriers. The methods include determining that a primary component carrier is operating less optimally than a secondary component carrier, sending an indication to the network that the primary component carrier is operating less optimally than the secondary component carrier, acquiring the secondary component carrier as a target primary component carrier and operating with the secondary component carrier as the target primary carrier component. In one exemplary embodiment, the indication is declaring a radio link failure (“RLF”) between the UE and the network. In another exemplary embodiment, the indication is a measurement report send to the network that triggers a handover procedure for the UE.

Abstract translation: 被配置为连接到网络并以载波聚合模式和单载波模式操作的用户设备（UE）执行选择最佳分量载波的方法。 所述方法包括确定主要分量载波的操作不如次要分量载波最佳地运行，向网络发送指示主分量载波运行的次要分量载波最不利地获得辅助分量载波作为目标主分量 载体并以辅助成分载体作为目标主载体成分进行操作。 在一个示例性实施例中，该指示声明UE和网络之间的无线电链路故障（“RLF”）。 在另一示例性实施例中，该指示是向网络发送触发UE的切换过程的测量报告。

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.