Improving accuracy when determining positions in a wireless network
First Claim
1. A method performed by a position calculation node in a wireless communication network for improving accuracy when determining positions in the wireless communication network, the method comprising:
- obtaining a signal transport time value for each of a plurality of different geographical user equipment (UE) positions, wherein the respective signal transport time value relates to the time it takes for a radio signal to travel between a first base station and one of the plurality of UE positions;
obtaining a geographical position value for each of the plurality of different geographical UE positions, the position values being independent of the signal transport time values;
determining an actual geographical position for the first base station, based on the obtained signal transport time values, the obtained position values and a predefined geographical position for the first base station; and
storing the determined actual geographical position for the first base station as a new predefined geographical position for the first base station, and, if there is a second base station, storing the determined actual geographical position for the second base station as a new predefined geographical position for the second base station.
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Accused Products
Abstract
Disclosed is a method performed by a position calculation node (160) in a wireless communication network (100). The node (160) is arranged for improving accuracy when determining positions in the wireless communication network. The method comprises obtaining a signal transport time value for each of a plurality of different geographical UE positions (UE1, UE2, UE3), wherein the respective signal transport time value relates to the time it takes for a radio signal to travel between a first base station and one of the plurality of UE positions. The method further comprises obtaining a geographical position value for each of the plurality of different geographical UE positions, the position values being independent of the signal transport time values, and determining an actual geographical position for the first base station, based on the obtained signal transport time values, the obtained position values and a predefined geographical position for the first base station.
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Citations
12 Claims
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1. A method performed by a position calculation node in a wireless communication network for improving accuracy when determining positions in the wireless communication network, the method comprising:
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obtaining a signal transport time value for each of a plurality of different geographical user equipment (UE) positions, wherein the respective signal transport time value relates to the time it takes for a radio signal to travel between a first base station and one of the plurality of UE positions; obtaining a geographical position value for each of the plurality of different geographical UE positions, the position values being independent of the signal transport time values; determining an actual geographical position for the first base station, based on the obtained signal transport time values, the obtained position values and a predefined geographical position for the first base station; and storing the determined actual geographical position for the first base station as a new predefined geographical position for the first base station, and, if there is a second base station, storing the determined actual geographical position for the second base station as a new predefined geographical position for the second base station. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A position calculation node in a wireless communication network, configured for improving accuracy when determining positions in the wireless communication network, the position calculation node comprising a processor and a memory, said memory containing instructions executable by said processor, whereby the position calculation node is operative to:
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obtain a signal transport time value for each of a plurality of different geographical UE positions, wherein the respective signal transport time value relates to the time it takes for a radio signal to travel between a first base station and one of the plurality of UE positions, wherein each of the signal transport time values comprises a time of arrival (TOA) value indicating when a radio signal arrived at a receiving node and a time of sending value indicating when the radio signal was sent from a transmitting node, the receiving node being the first base station and the transmitting node being a UE at one of the plurality of UE positions, or the receiving node being the UE at one of the plurality of UE positions and the transmitting node being the first base station; obtain a geographical position value for each of the plurality of different geographical UE positions, the position values being independent of the signal transport time values; and determine an actual geographical position for the first base station, based on the obtained signal transport time values, the obtained position values and a predefined geographical position for the first base station. - View Dependent Claims (8, 9, 10, 11)
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12. A method performed by a position calculation node in a wireless communication network for improving accuracy when determining positions in the wireless communication network, the method comprising:
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obtaining a signal transport time value for each of a plurality of different geographical user equipment (UE) positions, wherein the respective signal transport time value relates to the time it takes for a radio signal to travel between a first base station and one of the plurality of UE positions; obtaining a geographical position value for each of the plurality of different geographical UE positions, the position values being independent of the signal transport time values; determining an actual geographical position for the first base station, based on the obtained signal transport time values, the obtained position values and a predefined geographical position for the first base station; and determining an actual first base station delay, based on the obtained signal transport time values, the obtained position values, the predefined geographical position for the first base station and a predefined first base station delay.
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Specification