Directivity characteristics of mobile terminals
First Claim
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1. A method for determining mobility characteristics of a mobile terminal, comprising:
- measuring a first angular direction of travel of a mobile terminal at a first instant;
measuring a second an angular direction of travel of the mobile terminal at a second instant; and
subtracting the first angular direction from the second angular direction to determine a directivity of the mobile terminal during an interval of time between the first instant and the second instant, wherein the first angular direction is θ
n, the second angular direction is θ
n+1, the first instant is t, the second instant is t+T, the interval of time is T, and a directivity element is
β
n,n+1=θ
n+1−
θ
n; and
wherein a directivity vector stores N directivity elements of the mobile terminal as β
(T,N)=[ . . . β
n−
1,nβ
n,n+1β
n+1,n+2 . . . ], where β
i,i+1=(θ
i+1−
θ
i) per interval of time T.
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Abstract
A method determines mobility characteristics of a mobile terminal by measuring a first and second angular direction of travel of the mobile terminal at a first and second instant. The first angular direction is subtracted form the second angular direction to determine the directivity of the mobile terminal during an interval of time between the first instant and the second instant. The directivity, in terms of a mean, variance, or histogram can be used to classify the mobile terminal, and location-aware services can be adapted and delivered according to the classification.
9 Citations
20 Claims
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1. A method for determining mobility characteristics of a mobile terminal, comprising:
-
measuring a first angular direction of travel of a mobile terminal at a first instant;
measuring a second an angular direction of travel of the mobile terminal at a second instant; and
subtracting the first angular direction from the second angular direction to determine a directivity of the mobile terminal during an interval of time between the first instant and the second instant, wherein the first angular direction is θ
n, the second angular direction is θ
n+1, the first instant is t, the second instant is t+T, the interval of time is T, and a directivity element is
β
n,n+1=θ
n+1−
θ
n; and
wherein a directivity vector stores N directivity elements of the mobile terminal as β
(T,N)=[ . . . β
n−
1,nβ
n,n+1β
n+1,n+2 . . . ], where β
i,i+1=(θ
i+1−
θ
i) per interval of time T. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification