Method of updating the clock bias between a GSM network BTS and GPS Satellites
First Claim
1. A method of updating the clock bias between the common clock of the satellites of a radio navigation satellite system and the clock of a radio station of an asynchronous cellular radiotelephone system including a mobile device, a radio navigation satellite system receiver for receiving satellite data supplied by at least four satellites, and an assistance server for improving the acquisition of satellite data by said mobile device,said method including the following steps:
- said mobile device receiving said satellite data,said mobile device calculating pseudodistances between itself and said satellites,encapsulating said pseudodistances with the time at which said pseudodistances are calculated,transmitting said pseudodistances and said time at which said pseudodistances are calculated in the form of a radio signal from said mobile device to said assistance server via said radio station, andsaid assistance server determining the position of said mobile device and estimating the clock bias between the common clock of said satellites and the clock of said radio station using said pseudodistances and said time at which said pseudodistances are calculated.
5 Assignments
0 Petitions
Accused Products
Abstract
The present invention relates to a method of updating the clock bias between the common clock of the satellites of a radio navigation satellite system and the clock of a radio station of an asynchronous cellular radiotelephone system including a mobile device including a radio navigation satellite system receiver for receiving satellite data supplied by at least four satellites and an assistance server for improving the acquisition of satellite data by the mobile device. The method includes the steps of the mobile device receiving the satellite data, the mobile device calculating pseudodistances between itself and the satellites, encapsulating the pseudodistances with the time at which the pseudodistances are calculated, transmitting the pseudodistances and the time at which the pseudodistances are calculated in the form of a radio signal from the mobile device to the assistance server via the radio station, and the assistance server determining the position of the mobile device and estimating the clock bias between the common clock of the satellites and the clock of the radio station using the pseudodistances and the time at which the pseudodistances are calculated.
6 Citations
20 Claims
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1. A method of updating the clock bias between the common clock of the satellites of a radio navigation satellite system and the clock of a radio station of an asynchronous cellular radiotelephone system including a mobile device, a radio navigation satellite system receiver for receiving satellite data supplied by at least four satellites, and an assistance server for improving the acquisition of satellite data by said mobile device,
said method including the following steps: -
said mobile device receiving said satellite data, said mobile device calculating pseudodistances between itself and said satellites, encapsulating said pseudodistances with the time at which said pseudodistances are calculated, transmitting said pseudodistances and said time at which said pseudodistances are calculated in the form of a radio signal from said mobile device to said assistance server via said radio station, and said assistance server determining the position of said mobile device and estimating the clock bias between the common clock of said satellites and the clock of said radio station using said pseudodistances and said time at which said pseudodistances are calculated. - View Dependent Claims (2, 3, 4)
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5. An assistance service for improving the acquisition of satellite data by a mobile device, wherein a server comprises a database to store a clock bias between the clock of the radio stations of an asynchronous cellular radiotelephone system and a common clock of the satellites of a radio navigation satellite system, wherein said clock bias values are updated by a method comprising the following steps:
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said mobile device receiving said satellite data, said mobile device calculating pseudodistances between itself and said satellites, encapsulating said pseudodistances with a time at which said pseudodistances are calculated, transmitting said pseudodistances and said time at which said pseudodistances are calculated in the form of a radio signal from said mobile device to said server via said radio station, and said server determining the position of said mobile device and estimating the clock bias between the common clock of said satellites and the clock of said radio station using said pseudodistances and said time at which said pseudodistances are calculated.
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6. A method of improvement by an assistance server of the acquisition of satellite data by a mobile device including a radio navigation satellite system receiver in an asynchronous cellular radiotelephone system, said method including the following steps:
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said mobile device sending an assistance request to said assistance server via a radio station associated with said mobile device, and said server identifying a clock bias between the common clock of the satellites and the clock of said radio station as updated by said mobile device receiving said satellite data, said mobile device calculating pseudodistances between itself and said satellites, encapsulating said pseudodistances with a time at which said pseudodistances are calculated, transmitting said pseudodistances and said time at which said pseudodistances are calculated in the form of a radio signal from said mobile device to said assistance server via said radio station, determining the position of said mobile device, and estimating the clock bias between the common clock of said satellites and the clock of said radio station using said pseudodistances and said time at which said pseudodistances are calculated. - View Dependent Claims (7, 8, 9)
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10. A method of calculating the position of a mobile device including a radio navigation satellite system receiver in an asynchronous cellular radiotelephone system, said method including the following steps:
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an assistance server improving the acquisition of satellite data by said mobile device by said mobile device sending an assistance request to said assistance server via a radio station associated with said mobile device, and said server identifying the clock bias between the common clock of the satellites and the clock of said radio station as updated by an updating method comprising the following steps; said mobile device receiving said satellite data, said mobile device calculating pseudodistances between itself and said satellites, encapsulating said pseudodistances with a time at which said pseudodistances are calculated, transmitting said pseudodistances and said time at which said pseudodistances are calculated in the form of a radio signal from said mobile device to said assistance server via said radio station, and said server determining the position of said mobile device and estimating the clock bias between the common clock of said satellites and the clock of said radio station using said pseudodistances and said time at which said pseudodistances are calculated, said mobile device acquiring said satellite data, said mobile device calculating pseudodistances between said mobile device and the satellites from said satellite data, and said assistance server or said mobile device determining the position of said mobile device.
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11. A mobile device of an asynchronous cellular radiotelephone system including:
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a radio navigation satellite system receiver; and means for determining the position of said mobile device by; improving the acquisition of satellite data by said mobile device by said mobile device sending an assistance request to an assistance server via a radio station associated with said mobile device, and identifying the clock bias between the common clock of the satellites and the clock of said radio station as updated by; said mobile device receiving said satellite data, said mobile device calculating pseudodistances between itself and said satellites, encapsulating said pseudodistances with a time at which said pseudodistances are calculated, transmitting said pseudodistances and said time at which said pseudodistances are calculated in the form of a radio signal from said mobile device to said assistance server via said radio station, and determining the position of said mobile device and estimating the clock bias between the common clock of said satellites and the clock of said radio station using said pseudodistances and said time at which said pseudodistances are calculated, the means for determining the position of the mobile device also; acquiring said satellite data, calculating pseudodistances between said mobile device and the satellites from said satellite data, and determining the position of said mobile device. - View Dependent Claims (13, 14, 15, 16)
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12. A method of updating the clock bias between the common clock of the satellites of a radio navigation satellite system and the clock of a radio station of an asynchronous cellular radiotelephone system including a mobile device with a radio navigation satellite system receiver for receiving satellite data supplied by at least four satellites and exchanging a radio signal with said radio station and an assistance server for improving the acquisition of satellite data by said mobile device, said method including the following steps:
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said mobile device receiving said satellite data, said mobile device calculating pseudodistances between itself and said satellites, and said mobile device determining its position and estimating the clock bias between the common clock of said satellites and the clock of said radio station using said pseudodistances and said time at which said pseudodistances are calculated, said time at which said pseudodistances are calculated corresponding to time information supplied by said radio station. - View Dependent Claims (17, 18, 19, 20)
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Specification