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    • 6. 发明申请
    • METHOD AND APPARATUS FOR HANDOVER IN HETEROGENEOUS CELLULAR NETWORKS
    • 异构细胞网络切换的方法和装置
    • WO2015053923A1
    • 2015-04-16
    • PCT/US2014/056612
    • 2014-09-19
    • BLACKBERRY LIMITEDBONTU, Chandra, SekharSONG, YiCAI, Zhijun
    • BONTU, Chandra, SekharSONG, YiCAI, Zhijun
    • H04W36/00
    • H04W36/24H04W36/0072H04W36/0088H04W36/08H04W56/003H04W56/0045H04W72/042H04W72/0446H04W72/14H04W76/19
    • A method at a user equipment for handover from a serving cell to a target cell, the method sending a measurement report to the serving cell; and transmitting a reconfiguration complete message to the target cell; wherein the measurement report includes downlink timing measurements for the target cell. Further, a method at a source network element for handover of a user equipment from the source network element to a target network element, the method receiving a measurement report from the user equipment; sending a handover request to the target network element; receiving a handover request acknowledgement from the target network element, the handover request acknowledgement including a reconfiguration message and at least one downlink subframe in which an uplink grant is expected at the target network element for the user equipment; and forwarding the reconfiguration message and at least one downlink subframe to the user equipment.
    • 一种用于从服务小区切换到目标小区的用户设备的方法,所述方法向所述服务小区发送测量报告; 以及向所述目标小区发送重配置完成消息; 其中所述测量报告包括所述目标小区的下行链路定时测量。 此外,在源网元处的方法,用于将用户设备从源网元切换到目标网元,该方法从用户设备接收测量报告; 向所述目标网元发送切换请求; 从所述目标网络元件接收切换请求确认,所述切换请求确认包括重配置消息和至少一个下行链路子帧,在所述下行链路子帧中期望所述用户设备的所述目标网元处的上行链路许可; 以及将所述重配置消息和至少一个下行链路子帧转发到所述用户设备。
    • 7. 发明申请
    • REDUCING IMPACT OF CLOCK DRIFT IN WIRELESS DEVICES
    • 降低无线设备中时钟漂移的影响
    • WO2014137630A2
    • 2014-09-12
    • PCT/US2014/017759
    • 2014-02-21
    • QUALCOMM INCORPORATED
    • ALDANA, Carlos HoracioZHANG, Ning
    • H04W56/00
    • H04W56/0035H04W40/244H04W56/003H04W88/08
    • Systems and methods for calculating round trip time (RTT) between two wireless devices with respective clock drifts, while lowering the impact of the clock drifts on the RTT. A first RTT in a first direction is determined between a first wireless device and a second wireless device based on a first set of one or more messages exchanged between the first wireless device and the second wireless device. A second RTT in a second direction is determined between the second wireless device and the first wireless device based on a second set of one or more messages exchanged between the second wireless device and the first wireless device, and an average RTT of the first RTT and the second RTT is computed, wherein the average RTT has a low impact of the clock drifts.
    • 用于计算具有相应时钟漂移的两个无线设备之间的往返时间(RTT)的系统和方法,同时降低时钟漂移对RTT的影响。 基于在第一无线设备和第二无线设备之间交换的第一组一个或多个消息,在第一无线设备和第二无线设备之间确定第一方向上的第一RTT。 基于在第二无线设备与第一无线设备之间交换的一个或多个消息的第二集合以及第一RTT的平均RTT,在第二无线设备与第一无线设备之间确定第二方向上的第二RTT,以及 计算第二RTT,其中平均RTT具有时钟漂移的低影响。
    • 8. 发明申请
    • METHODS AND APPARATUS FOR TRANSMISSION OF UPLINK SOUNDING REFERENCE SIGNALS IN A COMMUNICATION SYSTEM WITH LARGE NUMBER OF ANTENNAS
    • 用于传输具有大量天线的通信系统中的上行链路参考信号的方法和装置
    • WO2014011004A2
    • 2014-01-16
    • PCT/KR2013006287
    • 2013-07-12
    • SAMSUNG ELECTRONICS CO LTD
    • SINGH JASPREETPI ZHOUYUE
    • H04W72/1284H04L5/0023H04L5/0032H04L5/0048H04L5/0078H04W56/0005H04W56/003H04W56/0045
    • A Method for preventing timing collisions in a wireless communication network is provided. The method comprises transmitting a first uplink symbol of normal duration via a first beam pair using a first timing advance (TA) corresponding to the first beam pair. Scheduling to transmit a second uplink symbol via a second beam pair (BP) using the same transmit RF chain and antenna array. Predicting a timing collision will occur based on a difference between the first TA and a second TA corresponding to the second BP. Preventing the timing collision by: reducing the duration of the second symbol by an adjustment amount calculated based on the first TA and the second TA; inserting a guard interval to delay transmission of the second symbol by the calculated adjustment amount; and increasing the duration of a cyclic prefix of the second symbol but refraining from transmitting a portion of the enlarged CP.
    • 提供了一种用于防止无线通信网络中的定时冲突的方法。 该方法包括使用对应于第一波束对的第一定时提前(TA)经由第一波束对来发送正常持续时间的第一上行链路符号。 调度通过使用相同发射RF链和天线阵列的第二波束对(BP)来发送第二上行链路符号。 基于第一TA和对应于第二BP的第二TA之间的差异来预测定时碰撞。 通过以下方式防止定时冲突:通过基于第一TA和第二TA计算的调整量来减少第二符号的持续时间; 插入保护间隔以将所述第二符号的传输延迟所计算的调整量; 并且增加第二符号的循环前缀的持续时间,但是不发送放大的CP的一部分。