Invention Grant
- Patent Title: Location determination using cached location area codes
- Patent Title (中): 使用高速缓存的位置区域代码进行位置确定
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Application No.: US12688824Application Date: 2010-01-15
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Publication No.: US08634860B2Publication Date: 2014-01-21
- Inventor: Ronald K. Huang , Robert Mayor
- Applicant: Ronald K. Huang , Robert Mayor
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Agency: Fish & Richardson P.C.
- Main IPC: G01S19/03
- IPC: G01S19/03 ; G01S19/04 ; G01S19/05

Abstract:
Methods, program products, and systems for location determination using cached location area codes are described. A mobile device can store a set of location area codes (LACs) of a cellular communications network on the mobile device. Each LAC can represent a location area of the cellular communications network that encompasses at least a predetermined number of cells. Each LAC can be further associated with an estimated geographic area. The estimated geographic area can be defined as a circle centered at a location and having a radius representing an uncertainty of the location. The mobile device can determine a current LAC of the mobile device based on a wirelessly received signal. The mobile device can determine a current location of the mobile device by performing a lookup in the stored set of LACs using the current LAC.
Public/Granted literature
- US20110177826A1 LOCATION DETERMINATION USING CACHED LOCATION AREA CODES Public/Granted day:2011-07-21
Information query