Method for positioning mobile devices and apparatus for positioning mobile devices
First Claim
1. A method for WiMAX positioning a mobile user station (MSS), comprising:
- detecting downlink preambles from a serving base station (BS) and at least one neighboring BS at an MSS, wherein the downlink preambles are synchronized in a time-division duplex (TDD) mode for mobile WiMAX;
determining a time difference of arrival (TDoA) for at least one neighboring BS in relation to the serving BS through preamble-based synchronization detection based at least in part on the received downlink preambles and the TDD mode synchronization;
obtaining ranging information for the MSS in relation to the serving BS in conjunction with a ranging procedure; and
calculating a location for the MSS based at least in part on the determined TDoA and the obtained ranging information using a select positioning algorithm.
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Abstract
The present invention relates to a mobile communication field. The present invention provides a method and an apparatus for WiMAX positioning by downlink preamble fast detection DPFD. The method comprises steps of: Mobile user station MSS detects downlink preambles from BSs, all of which are synchronized by in TDD mode mobile WiMAX; the TDoA of different BSs'"'"' preamble is get through preamble-based synchronization detection; and the exact location is calculated through classical TDoA algorithms. The embodiment of the present invention describes a novel concept for measuring the position of the mobile user equipment by the uplink ranging assistant downlink preamble detection. With the mobile WiMAX is accepted as a 3G standard by ITU and widely populated, the position based on WiMAX will be a market-potential service.
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Citations
23 Claims
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1. A method for WiMAX positioning a mobile user station (MSS), comprising:
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detecting downlink preambles from a serving base station (BS) and at least one neighboring BS at an MSS, wherein the downlink preambles are synchronized in a time-division duplex (TDD) mode for mobile WiMAX; determining a time difference of arrival (TDoA) for at least one neighboring BS in relation to the serving BS through preamble-based synchronization detection based at least in part on the received downlink preambles and the TDD mode synchronization; obtaining ranging information for the MSS in relation to the serving BS in conjunction with a ranging procedure; and calculating a location for the MSS based at least in part on the determined TDoA and the obtained ranging information using a select positioning algorithm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for positioning a WiMAX user terminal, comprising:
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detecting downlink preambles from a first base station (BS) and at least one neighboring BS at a user terminal in conjunction with the user terminal performing a scan interval, wherein the BSs are associated with a WiMAX access service network and the downlink preambles are synchronized in a time-division duplex (TDD) mode for WiMAX communications; determining a time difference of arrival (TDoA) for at least one neighboring BS in relation to the first BS through preamble-based synchronization detection based at least in part on the received downlink preambles and the TDD mode synchronization; obtaining ranging information for the user terminal in relation to the first BS in conjunction with a ranging procedure; and calculating a location for the user terminal based at least in part on the determined TDoA and the obtained ranging information using a select positioning algorithm. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23)
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Specification