利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

83 条记录 (耗时 0.02 秒)

    Mobile station assisted timing synchronization in a cdma communication system
    7.
    发明公开
    Mobile station assisted timing synchronization in a cdma communication system 审中-公开
    移动台辅助的cdma通信系统中的定时同步

    公开(公告)号：EP1821430A2

    公开(公告)日：2007-08-22

    申请号：EP07010283.5

    申请日：1999-01-15

    申请人： Qualcomm, Incorporated

    发明人： Wheatley, Charles E., III. ,  Tiedemann, Edward G., Jr.

    IPC分类号： H04B7/26 ,  H04B1/707

    CPC分类号： H04B7/2687 ,  H04B1/7075 ,  H04B1/70753 ,  H04B1/7077 ,  H04B2201/70701 ,  H04B2201/70702 ,  H04J3/0682 ,  H04J13/00

    摘要： In the present invention, the slave base station attains synchronization with the reference base station through messages transmitted from and received by a mobile station either in the soft handoff region between the reference base station and the slave base station or within a range which allows the mobile station to communicate with the slave base station. When the mobile station is not in communication with both the reference base station and the slave base station, then the round trip delay between the mobile station and the reference base station is measured by the reference base station. The reference base station communicates the PN code used by the mobile station over the reverse link to the slave base station. The slave base station acquires the signal from the mobile station and determines when the signal from the mobile station arrives. The slave base station then makes and estimates as to the length of the delay between transmission of a signal from the mobile station to the slave base station. Based upon these measurements and estimates, the slave base station determines the error which is present in the slave base station system time.

    摘要翻译： 在本发明中，从基站通过在参考基站和从基站之间的软切换区域中或者在允许移动站的移动台发送和接收的消息的范围内实现与参考基站的同步 站与从站基站进行通信。 当移动台未与参考基站和从属基站通信时，则参考基站测量移动台和参考基站之间的往返延迟。 参考基站通过反向链路将移动台使用的PN码传送给从基站。 从基站从移动台获取信号并确定来自移动台的信号何时到达。 然后从基站产生并估计从移动台到从基站的信号传输之间的延迟时间。 基于这些测量和估计，从基站确定从基站系统时间中存在的错误。

    Method and apparatus for coordinating transmission of short messages with hard handoff searches in a wireless communications system
    9.
    发明公开
    Method and apparatus for coordinating transmission of short messages with hard handoff searches in a wireless communications system 有权
    用于协调无线通信系统中的短消息和硬越区切换搜索的传输方法和装置

    公开(公告)号：EP1509058A2

    公开(公告)日：2005-02-23

    申请号：EP04026288.3

    申请日：1999-04-30

    申请人： QUALCOMM INCORPORATED

    发明人： Chen, Tao ,  Tiedemann, Edward G., Jr. ,  Saints, Keith W. ,  Glauser, Olivier

    IPC分类号： H04Q7/38

    CPC分类号： H04W24/10 ,  H04L1/0045 ,  H04W36/0083 ,  H04W36/0088 ,  H04W36/0094 ,  H04W36/38 ,  H04W52/44 ,  H04W88/02

    摘要： A method and apparatus for coordinating the time at which a mobile station (5) performs searches for alternative systems to which a hard handoff will occur. In one system which includes the present invention, the mobile station (5) receives a command which instructs the mobile station (5) as to when to tune to alternative frequencies in order to search for indications of the presence of an alternative system. In another system which includes the present invention, predetermined times are defined with respect to a reference point in time that is common to both a origination base station (10) and a mobile station (5). The mobile station (5) tunes to alternative frequencies to perform searches only during these predetermined times. In addition, the mobile station (5) coordinates the transmission of reports which indicate the results of searches for alternative systems such that these reports are only transmitted from the mobile station (5) when the mobile station (5) is tuned to the origination frequency.

    摘要翻译： 一种用于协调的时间的方法和装置在其中移动站（5）执行用于替代系统以哪一个硬越区切换将发生搜索。 在一个系统，其包括本发明中，所述移动台（5）接收到指示所述移动台的命令（5）。当以调谐到在为了搜索的替代系统的存在的指示的替代频率。在另一个 其中系统包括本发明中，预定时间是相对于在时间参考点定义的那样是常见的两种一个始发基站（10）和移动台（5）。 所述移动台（5）调谐到替代频率仅在合成预定时间来执行搜索。 此外，所述移动台（5）坐标的报告传输其指示搜索的所测试的那样合成报告是从移动站（5）当所述移动台（5）被调谐到始发频率仅反mitted替代系统的结果 ，