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    • 9. 发明授权
    • Location caching with expiration based on location
    • 基于位置的到达位置缓存
    • US07970415B2
    • 2011-06-28
    • US11953495
    • 2007-12-10
    • Jeffrey Clinton MikanJustin McNamaraFulvio Cenciarelli
    • Jeffrey Clinton MikanJustin McNamaraFulvio Cenciarelli
    • H04W24/00
    • H04W8/02H04L67/18H04W4/02H04W8/08H04W88/18
    • A system for locating a device in a wireless network that caches a known location and sets an expiration time based on the location. The system correlates the location with known places, such as movie theaters, restaurants, etc. to set the expiration time. For example, if a device was known to be at a movie theater, the expiration time would be set to a longer period of time. However, if the device was determined to be in a moving location, the expiration time would be set to a shorter period of time. The system also includes a mechanism to query the cached location based on a current time of the query and a granularity variable the accounts for a geographic area in which the device is located. The system also accounts for special locations where the mobile device will likely not be moving for long periods of time, or locations where the mobile device may move great distances between determinations of actual location.
    • 一种用于定位无线网络中的设备的系统,其缓存已知位置并基于所述位置设置到期时间。 该系统将位置与诸如电影院,餐馆等的已知地点相关联以设置到期时间。 例如,如果设备已知在电影院,则到期时间将被设置为更长的时间。 然而,如果设备被确定为处于移动位置,则到期时间将被设置为较短的时间段。 该系统还包括基于查询的当前时间查询缓存位置的机制以及考虑设备所位于的地理区域的粒度变量。 该系统还考虑了移动设备长时间可能不会移动的特殊位置,或者移动设备可能在确定实际位置之间移动很远距离的位置。