Method of controlling a satellite communication system, a timing unit, and a control unit of a timing unit
First Claim
1. A method for controlling a satellite communication system, the method comprising:
- dividing the coverage area of the satellite communication system into one or several geographical areas;
positioning one or several timing units in at least one geographical area;
determining which of a plurality of satellites of the satellite communication system are visible in each particular geographical area;
controlling the timing unit with a control unit, in order to minimize the time difference within the system, to listen to one or several satellites visible in each particular geographical area, the signals received from the satellites by the timing unit fulfilling a predetermined condition,wherein the satellite communication system includes a plurality of satellites and ground network system devices positioned on earth.
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Accused Products
Abstract
A method of controlling a satellite communication system, a timing unit, and a control unit of a timing unit. The method comprises dividing the coverage area of the satellite communication system into one or several geographical areas; positioning one or several timing units in at least one geographical area; determining which of the satellites of the satellite communication system are visible in each particular geographical area; controlling the timing unit with a control unit, in order to minimize the time difference within the system, to listen to one or several satellites visible in each particular geographical area, the signals received from the satellites by the timing unit fulfilling a predetermined condition; synchronizing a predetermined number of geographical areas with each other by means of the control unit of the system such that the time difference within the system is minimized in a predetermined combination area of geographical areas.
12 Citations
32 Claims
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1. A method for controlling a satellite communication system, the method comprising:
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dividing the coverage area of the satellite communication system into one or several geographical areas; positioning one or several timing units in at least one geographical area; determining which of a plurality of satellites of the satellite communication system are visible in each particular geographical area; controlling the timing unit with a control unit, in order to minimize the time difference within the system, to listen to one or several satellites visible in each particular geographical area, the signals received from the satellites by the timing unit fulfilling a predetermined condition, wherein the satellite communication system includes a plurality of satellites and ground network system devices positioned on earth. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11)
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2. A method for controlling a satellite communication system, the method comprising:
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dividing the coverage area of the satellite communication system into one or several geographical areas; positioning one or several timing units in at least one geographical area; determining which of a plurality of satellites of the satellite communication system are visible in each particular geographical area; controlling the timing unit with a control unit, in order to minimize the time difference within the system, to listen to one or several satellites visible in each particular geographical area, the signals received from the satellites by the timing unit fulfilling a predetermined condition; synchronizing a predetermined number of geographical areas with each other by means of the control unit of the system in such a way that the time difference within the system is minimized in a predetermined combination area of geographical areas, wherein the satellite communication system includes a plurality of satellites and ground network system devices positioned on earth. - View Dependent Claims (12)
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13. A control unit of a timing unit in a satellite communication system comprising:
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determining unit configured to determine which of the satellites of the satellite communication system are visible in each particular geographical area; controlling unit configured to control the timing unit, in order to minimize the time difference within the system, to listen to one or several of the satellites visible in each particular geographical area, the signals received from the satellites by the timing unit fulfilling a predetermined condition. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21)
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14. A control unit of a timing unit in a satellite communication system comprising:
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determining unit configured to determine which of the satellites of the satellite communication system are visible in each particular geographical area; controlling unit configured to control the timing unit, in order to minimize the time difference within the system, to listen to one or several of the satellites visible in each particular geographical area, the signals received from the satellites by the timing unit fulfilling a predetermined condition; synchronizing unit configured to synchronize a predetermined number of geographical areas with each other in such a way that the time difference within the system is minimized in a predetermined combination area of geographical areas.
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22. A timing unit of a satellite communication system comprising:
receiving unit configured to control commands from the control unit of the timing unit in order to minimize the time difference within the system, the control commands being used to control the timing unit to listen to one or several of the satellites visible in each particular geographical area, the signals received from the satellites fulfilling a predetermined condition. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30)
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31. A control unit of a timing unit in a satellite communication system comprising:
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determining means for determining which of the satellites of the satellite communication system are visible in each particular geographical area; and control means for controlling the timing unit, in order to minimize the time difference within the system, to listen to one or several of the satellites visible in each particular geographical area, the signals received from the satellites by the timing unit fulfilling a predetermined condition.
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32. A timing unit of a satellite communication system comprising:
receiving means for receiving control commands from the control unit of the timing unit in order to minimize the time difference within the system, the control commands being used to control the timing unit to listen to one or several of the satellites visible in each particular geographical area, the signals received from the satellites fulfilling a predetermined condition.
Specification