Method and apparatus for navigation systems
First Claim
1. A network element comprisinga controlling element for forming assistance data relating to two or more signals transmitted by a reference stations of at least one navigation system;
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wherein the network element further comprises an examining element adapted to examine the status of said two or more signals transmitted by the reference stations of the navigation system to determine the usability of the signal in a positioning of a device;
wherein the controlling element is adapted to insert, for each signal the examining element determined not to be usable in a positioning of the device, an indication on the non-usability of the signal, said indication comprising information on the signal and on the reference station the signal relates to into the assistance data.
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Accused Products
Abstract
The invention relates to navigation systems and elements. A network element (M) includes a controlling element (M.1) for forming assistance data relating to one or more reference stations (S1, S2) of at least one navigation system; and a transmitter (M.3.1) for transmitting the assistance data via a communications network (P) to a device (R). The device (R) includes a positioning receiver (R.3) for performing positioning on the basis of one or more signals transmitted by reference stations (S1, S2) of the at least one satellite navigation system; a receiver (R.2.2) for receiving the assistance data relating to at least one navigation system from the network element (M); and an examining element (R.1.1) adapted to examine the received assistance data to find out information relating to the status of the one or more signals of the reference stations (S1, S2) including indication on the reference station (S1, S2) the signal relates to, and the status indicating the usability of the signal. Therefore, the device (R) is adapted not to use in the positioning such a signal which is indicated not to be usable.
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Citations
10 Claims
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1. A network element comprising
a controlling element for forming assistance data relating to two or more signals transmitted by a reference stations of at least one navigation system; - and
a transmitting element for transmitting assistance data to a communications network; wherein the network element further comprises an examining element adapted to examine the status of said two or more signals transmitted by the reference stations of the navigation system to determine the usability of the signal in a positioning of a device; wherein the controlling element is adapted to insert, for each signal the examining element determined not to be usable in a positioning of the device, an indication on the non-usability of the signal, said indication comprising information on the signal and on the reference station the signal relates to into the assistance data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for transmitting assistance data to a device, the method comprising:
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forming assistance data relating to two or more signals transmitted by a reference stations of at least one navigation system; and transferring the assistance data to the device;
wherein the method further comprisesexamining the status of said two or more signals transmitted by the reference stations of the navigation system to determine the usability of the signal in a positioning of a device; and inserting, for each signal the examining indicated not to be usable in a positioning of the device, an indication on the non-usability of the signal, said indication comprising information on the signal and on the reference station the signal relates to into the assistance data.
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Specification