Multi-dimensional adaptive transmission technique
First Claim
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1. A method for adjusting the transmission power of a remote terminal in a satellite system, the method comprising:
- operating a remote terminal in an installation mode when the remote terminal is installed or when its configuration is modified, and operating the remote terminal in a normal mode at other times, wherein operating the remote terminal in the installation mode comprises;
erasing any previously stored transmit power range and any previously stored maximal transmit power level;
determining an initial transmit power level using a predefined value;
sending a predefined number of logon messages at the determined initial transmit power level;
increasing the transmit power for logon messages upon failing to receive acknowledgement for any of the transmitted logon messages; and
upon receiving an acknowledgement one or more of the transmitted logon messages, configuring the remote terminal to operate in the normal mode.
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Abstract
Method and apparatus for dynamically optimizing the transmission level of each remote terminal in a satellite-based communication network. Each remote terminal maintains quasi-error-free communication at the highest efficiency level available under changing link conditions and network configurations, without requiring the reservation of substantial power margins, which results in a much more efficient satellite network.
14 Citations
38 Claims
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1. A method for adjusting the transmission power of a remote terminal in a satellite system, the method comprising:
operating a remote terminal in an installation mode when the remote terminal is installed or when its configuration is modified, and operating the remote terminal in a normal mode at other times, wherein operating the remote terminal in the installation mode comprises; erasing any previously stored transmit power range and any previously stored maximal transmit power level; determining an initial transmit power level using a predefined value; sending a predefined number of logon messages at the determined initial transmit power level; increasing the transmit power for logon messages upon failing to receive acknowledgement for any of the transmitted logon messages; and upon receiving an acknowledgement one or more of the transmitted logon messages, configuring the remote terminal to operate in the normal mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method comprising:
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transmitting from a remote terminal in a satellite-based communication network a predefined number of maintenance packets at the same transmit power level; receiving reply packets over a forward link containing reception level measurements of the transmitted maintenance packets; calculating the average reception level for the transmitted maintenance packets; calculating a gain equivalent as the difference between the average reception level and a satellite transmitter'"'"'s input power level; repeatedly increasing the transmit power level of the satellite transmitter; and
repeating the above steps for each increased transmit power level, until about a 1 dB drop in gain is detected and an about 1 dB compression point is found;calculating a maximal transmit power level as the satellite transmitter'"'"'s highest input power level for which the calculated gain is about 1 dB higher than the gain measured at the about 1 dB compression point; and storing the calculated maximal transmit power level in non-volatile memory, if the calculated maximal transmit power level is greater than an already stored power level value, or if no previous power level value is available. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method comprising:
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measuring or gathering statistics on the distribution of allocations between different timeslot types in a return link of a satellite-based communication network; calculating a percentage of remote terminals in the satellite-based communication network which may transmit using any of the different timeslot types; and reconfiguring the distribution of allocations between the timeslot types, by adjusting the distribution of allocations based on the needs of the network as reflected by said measurements and calculations.
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22. A method for adjusting the transmission power of a remote terminal in a satellite system, the method comprising:
operating a remote terminal in an installation mode when the remote terminal is installed or when its configuration is modified, and operating the remote terminal in a normal mode at other times, the normal mode comprising an admission phase and a session phase, wherein operating the remote terminal in the admission phase of the normal mode comprises; determining an initial transmit power level using a predefined back off from a highest maximal transmission level stored in the remote terminal'"'"'s non-volatile memory; sending a predefined number of logon messages at the determined initial transmit power; increasing the transmit power for logon messages upon failing to receive acknowledgement for any of the transmitted logon messages; and upon receiving an acknowledgement for one or more of the transmitted logon messages, configuring the remote terminal to operate in the session phase. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
Specification