Communications: directive radio wave systems and devices (e.g. – Directive – Including a satellite
Reexamination Certificate
2007-11-20
2007-11-20
Issing, Gregory C. (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a satellite
C342S458000
Reexamination Certificate
active
10337454
ABSTRACT:
An apparatus and method for locating a UE using a GPS and a dead-reckoning sensor are disclosed. At an initial time, the UE calculates its initial position and the initial position of a serving Node B using a received GPS satellite signal and calculates a first distance between the UE and the Node B based on a first RTT received from the Node B. A predetermined time later, the UE calculates a second distance between the UE and the Node B based on a second RTT received from the Node B, calculates the distance that it has moved using the first and second distances and its position angle measured the predetermined time later, and calculates a displacement in correspondence with the distance using the position angle. Then the position of the UE is obtained by adding the displacement to the initial position of the UE.
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McLellan, James F. et al, “The NavTrax Fleet Management System,” IEEE 1992, pp. 509-515.
Issing Gregory C.
Samsung Electronics Co,. Ltd.
The Farrell Law Firm
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