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    • 44. 发明授权
    • D2D device discovery method and apparatus based on LTE cellular communications system
    • 基于LTE蜂窝通信系统的D2D设备发现方法和装置
    • US09584997B2
    • 2017-02-28
    • US14550307
    • 2014-11-21
    • Huawei Technologies Co., Ltd.
    • Han ZhouShulan Feng
    • H04B1/38H04B1/40H04W8/00H04B17/16H04L5/00H04L27/26H04W76/02H04W56/00H04W40/24
    • H04W8/005H04B17/16H04L5/003H04L27/2601H04W40/246H04W56/004H04W76/14Y02D70/122Y02D70/1262Y02D70/142Y02D70/144Y02D70/21
    • This invention is applicable to the field of communications technologies, and provides a device to device (D2D) discovery method and a first D2D user equipment (UE). The method includes: the first D2D UE acquires timing information of the first D2D UE from a Lont Term Evolution (LTE) cellular communications system; receives in a discovery subframe, a device discovery signal from a second D2D UE according to the timing information, wherein the device discovery signal comprises a pilot orthogonal frequency division multiplexing (OFDM) symbol and a device information OFDM symbol; acquires an arrival time of the device discovery signal by performing a time domain correlation of the pilot OFDM symbol of the device discovery signal and a local pilot sequence, acquires device information of the second D2D UE by parsing the device information OFDM symbol of the device discovery. This invention enables a D2D UE to effectively discover other D2D UEs, improves system efficiency, and saves power of the D2D UE.
    • 本发明适用于通信技术领域,并且提供了一种设备到设备(D2D)发现方法和第一D2D用户设备(UE)。 该方法包括:第一D2D UE从朗讯(LTE)蜂窝通信系统获取第一D2D UE的定时信息; 在发现子帧中接收来自第二D2D UE的设备发现信号,其中所述设备发现信号包括导频正交频分复用(OFDM)符号和设备信息OFDM符号; 通过执行设备发现信号的导频OFDM符号与本地导频序列的时域相关来获取设备发现信号的到达时间,通过解析设备发现的设备信息OFDM符号来获取第二D2D UE的设备信息 。 本发明使D2D UE能够有效发现其他D2D UE,提高系统效率,节省D2D UE的功率。
    • 47. 发明授权
    • Fast initial link setup (FILS) frame content for a wireless network
    • 用于无线网络的快速初始链路建立(FILS)帧内容
    • US09554324B2
    • 2017-01-24
    • US14051583
    • 2013-10-11
    • STMicroelectronics, Inc.
    • Liwen ChuGeorge A. Vlantis
    • H04W40/24H04W48/16H04W8/00H04W48/12
    • H04W48/16H04W8/005H04W40/244H04W40/246H04W48/12
    • A wireless network access point generates a fast initial link setup (FILS) discovery frame for broadcast to one or more wireless stations. The wireless network access point supports many operating channels including a primary channel. The FILS discovery frame includes a data field populated with an identification of a channel number for that primary channel of the wireless network access point. The FILS discovery frame includes another data field populated with a primary channel operating class identification. The broadcast FILS discovery frame further includes data indicating whether indicating whether multiple BSSIDs are supported. An FD capability field of the FILS discovery frame includes sub-fields indicating one or more of operation channel width, PHY type of the wireless access point, number of spatial streams supported by the wireless access point and multiple BSSIDs support provided by the wireless access point.
    • 无线网络接入点生成用于广播到一个或多个无线站的快速初始链路建立(FILS)发现帧。 无线网络接入点支持许多操作信道,包括主信道。 FILS发现帧包括填充有无线网络接入点的主信道的信道号的标识的数据字段。 FILS发现帧包括填充有主信道操作类标识的另一数据字段。 广播FILS发现帧还包括指示是否指示是否支持多个BSSID的数据。 FILS发现帧的FD能力字段包括指示操作信道宽度,无线接入点的PHY类型,无线接入点支持的空闲数量的数量和由无线接入点提供的多个BSSID支持中的一个或多个的子字段 。