公开(公告)号：US20150245368A1

公开(公告)日：2015-08-27

申请号：US14708476

申请日：2015-05-11

Applicant: APPLE INC.

Inventor： Gaurav R. NUKALA ,  Venkatasubramanian RAMASAMY ,  Giri Prassad DEIVASIGAMANI

IPC: H04W72/08 ,  H04W4/08 ,  H04W72/04 ,  H04B7/04 ,  H04W24/08

CPC classification number: H04W72/085 ,  H04B7/0417 ,  H04B7/0452 ,  H04L1/001 ,  H04L1/007 ,  H04L1/0072 ,  H04L5/0023 ,  H04L5/0053 ,  H04W4/08 ,  H04W24/08 ,  H04W72/042 ,  H04W72/044

Abstract: Transmission capacity for a control channel sent to multiple mobile wireless devices in a wireless network is increased by transmitting the control channel using multi user multiple input multiple output transmissions (MU MIMO). Received signal quality measured at mobile wireless devices in a radio sector are communicated to a radio node and used to determine one or more sets of mobile wireless devices to share transmission of control channel elements on the same time and frequency resource element. The radio node indicates the use of MU MIMO and the selection of precoding matrices to each of the mobile wireless devices in the each set of mobile wireless devices.

Abstract translation: 通过使用多用户多输入多输出传输（MU MIMO）发送控制信道来增加发送到无线网络中的多个移动无线设备的控制信道的传输容量。 将在无线电扇区中的移动无线设备处测量的接收信号质量传送到无线电节点，并用于确定一组或多组移动无线设备，以在相同的时间和频率资源元素上共享控制信道单元的传输。 无线电节点指示MU MIMO的使用以及对每组移动无线设备中的每个移动无线设备的预编码矩阵的选择。

公开(公告)号：US20150065188A1

公开(公告)日：2015-03-05

申请号：US14480337

申请日：2014-09-08

Applicant: Apple Inc.

Inventor： Gaurav R. NUKALA ,  Venkatasubramanian RAMASAMY

IPC: H04W52/24 ,  H04W52/26 ,  H04W52/36

CPC classification number: H04W52/246 ,  H04B17/102 ,  H04W52/08 ,  H04W52/241 ,  H04W52/265 ,  H04W52/365 ,  H04W52/367 ,  H04W52/42 ,  H04W88/02

Abstract: Methods and apparatuses to select a transmit antenna in a mobile wireless device connected to a wireless network are described. The mobile wireless device monitors received signal characteristics through first and second antennas and switches antennas based on the monitored signal characteristics and on an assessment of the sufficiency of available transmit power headroom to accommodate data transmissions in the uplink direction. Sufficiency is determined based on one or more criteria including achievable data rate throughput, quality of service, grade of service, an amount of data buffered, an amount of resources allocated by the wireless network and a number of “power up” commands received by the mobile wireless device during a pre-determined time interval.

Abstract translation: 描述了在连接到无线网络的移动无线设备中选择发射天线的方法和装置。 移动无线设备通过第一和第二天线监视接收的信号特性，并且基于所监测的信号特性以及对可用发射功率余量的充分性的评估来切换天线以适应上行链路方向上的数据传输。 基于包括可实现的数据速率吞吐量，服务质量，服务等级，缓冲数据量，无线网络分配的资源量以及由该无线网络接收的多个“上电”命令的一个或多个标准来确定充分性 移动无线设备在预定时间间隔期间。

公开(公告)号：US20140099955A1

公开(公告)日：2014-04-10

申请号：US14049146

申请日：2013-10-08

Applicant: Apple Inc.

Inventor： Gaurav R. NUKALA ,  Giri Prassad DEIVASIGAMANI ,  Si LI

IPC: H04W36/00

CPC classification number: H04W36/00 ,  H04W36/0055 ,  H04W36/36

Abstract: Apparatus and methods of performing a network cell reselection for a mobile device after a handover attempt fails. Initially, a handover is attempted for the mobile device in a radio resource control (RRC) connected mode from a serving network base station to a target network base station. Next a failure condition associated with the handover attempt is identified by the mobile device. In one scenario, the failure condition is identified in response to the mobile device receiving an RRC connection release message from its serving network base station. In another scenario, the failure condition is identified when the mobile device detects a radio link failure event. Thereafter, the mobile device performs a network scan to identify any available network base stations for the network cell reselection. Subsequently, the mobile device attaches to a preferred network base station of the identified available network base stations to complete the network cell reselection.

Abstract translation: 在切换尝试失败之后为移动设备执行网络小区重选的装置和方法。 最初，在从服务网络基站到目标网络基站的无线电资源控制（RRC）连接模式中，针对移动设备尝试切换。 接下来，移动设备识别与切换尝试相关联的故障条件。 在一种情况下，响应于移动设备从其服务网络基站接收到RRC连接释放消息来识别故障条件。 在另一种情况下，当移动设备检测到无线电链路故障事件时，识别故障条件。 此后，移动设备执行网络扫描以识别用于网络小区重选的任何可用的网络基站。 随后，移动设备连接到所识别的可用网络基站的优选网络基站，以完成网络小区重新选择。