Apparatus and method for positioning mobile station
First Claim
1. An apparatus for calculating an enhanced observed time difference from a mobile station and transmitting the enhanced observed time difference to a servicing mobile location center for a location-based service, the apparatus comprising:
- means for receiving a location-measuring request and assistance data from the servicing mobile location center;
means for choosing a base transceiver station, the synchronization channel of which is to be measured, based on response time detected from the location-measuring request and a predetermined priority; and
means for calculating an enhanced observed time difference for the chosen base transceiver station and transmitting a location-measuring response, including the calculation result, to the servicing mobile location center, wherein said predetermined priority is set to a priority order of;
[1] an overlap between a channel list included in the assistance data and a list of a number of nearby cells having a higher priority than [2] a broadcast control channel allocation list excepting the channel list included in the assistance data and the list of nearby cells.
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Accused Products
Abstract
An apparatus and a method for calculating an enhanced observed time difference from a mobile station and transmitting the enhanced observed time difference to a servicing mobile location center for a location-based service are provided. The apparatus comprises means for receiving a location-measuring request and assistance data from the servicing mobile location center; means for choosing a base transceiver station, the synchronization channel of which is to be measured, based on response time detected from the location-measuring request and a predetermined priority; and means for calculating an enhanced observed time difference for the chosen base transceiver station and transmitting a location-measuring response, including the calculation result, to the servicing mobile location center. A first priority is assigned to an overlap between a channel list included in the assistance data and a list of a number of nearby cells and a second priority is assigned to a broadcast control channel allocation list except the channel list included in the assistance data and the list of nearby cells.
51 Citations
8 Claims
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1. An apparatus for calculating an enhanced observed time difference from a mobile station and transmitting the enhanced observed time difference to a servicing mobile location center for a location-based service, the apparatus comprising:
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means for receiving a location-measuring request and assistance data from the servicing mobile location center;
means for choosing a base transceiver station, the synchronization channel of which is to be measured, based on response time detected from the location-measuring request and a predetermined priority; and
means for calculating an enhanced observed time difference for the chosen base transceiver station and transmitting a location-measuring response, including the calculation result, to the servicing mobile location center, wherein said predetermined priority is set to a priority order of;
[1] an overlap between a channel list included in the assistance data and a list of a number of nearby cells having a higher priority than [2] a broadcast control channel allocation list excepting the channel list included in the assistance data and the list of nearby cells.
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2. An apparatus for calculating an enhanced observed time difference from a mobile station and transmitting the enhanced observed time difference to a servicing mobile location center for a location-based service, the apparatus comprising:
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a period checker unit adapted to determine if a predetermined period has arrived;
a detector unit adapted to detect the intensity of received signals whenever the period has arrived for detecting the intensity of received signals for an entire channel;
a first memory for storing a database of the intensity of received signals detected by the detector unit; and
a controller unit adapted to choose a base transceiver station, the synchronization channel of which is to be measured, when a location-measuring request and assistance data are received from the servicing mobile location center, based on response time detected from the location-measuring request and a predetermined priority, calculate an enhanced observed time difference for the chosen base transceiver station and transmit a location-measuring response, including the calculation result, to the servicing mobile location center, wherein said priority is set to a priority order of;
[1] an overlap between a channel list included in the assistance data and a list of a number of nearby cells, having a higher priority level than [2] a broadcast control channel allocation list excepting the channel list included in the assistance data and the list of nearby cells, having a higher priority level than [3] a cell having the strongest signal intensity among the remaining base transceiver stations. - View Dependent Claims (3, 4, 5)
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6. A method for calculating an enhanced observed time difference from a mobile station and transmitting the enhanced observed time difference to a servicing mobile location center for a location-based service, the method comprising:
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receiving a location-measuring request and assistance data from the servicing mobile location center via a radio resource link protocol;
choosing a base transceiver station, the synchronization channel of which is to be measured, based on response time detected from the location-measuring request and a predetermined priority; and
receiving the synchronization channel of the chosen base transceiver station, calculating an enhanced observed time difference for the chosen base transceiver station, and transmitting a location-measuring response, including the calculation result, to the servicing mobile location center via the radio resource link protocol, wherein a first priority is assigned to an overlap between a channel list included in the assistance data and a list of a number of nearby cells, and a second priority is assigned to a broadcast control channel allocation list.
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7. A method for calculating an enhanced observed time difference from a mobile station and transmitting the enhanced observed time difference to a servicing mobile location center for a location-based service, the method comprising:
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determining if a detection period has arrived;
detecting and storing the intensity of received signals for the entire channel when the period has arrived;
receiving a location-measuring request and assistance data via a cordless resource link protocol;
choosing a base transceiver station, the synchronization channel of which can be measured, based on response time detected from the location-measuring request and predetermined priority; and
receiving the synchronization channel of the chosen base transceiver station, calculating an enhanced observed time difference for the chosen base transceiver station and transmit a location-measuring response, including the calculation result, to the servicing mobile location center via the radio resource link protocol, wherein a first priority is assigned to an overlap between a channel list included in the assistance data and a list of six nearby cells, a second priority is assigned to a broadcast control channel allocation list, and a third priority is assigned to a channel having the strongest signal intensity stored in the second step. - View Dependent Claims (8)
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Specification