Apparatus and method for link adaptation of packet data service on satellite systems
First Claim
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1. A method for managing a communications link, the method comprising the steps of:
- continuously monitoring a quality parameter of the link, the link providing a satellite-based packet data service to a user terminal;
reducing a short-term sensitivity of the quality parameter such that a modified quality parameter results; and
adapting an operating parameter of the link based on the modified quality parameter.
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Abstract
A system and method is provided for adapting communications links in a satellite system. A quality parameter of a communications link is continuously monitored, wherein the link provides satellite-based packet data service to a user terminal. The method further provides for reducing a short-term sensitivity of the quality parameter such that a modified quality parameter results. An operating parameter of the link is adapted based on the modified quality parameter. By adapting the operating parameter, transmission throughput can be optimized according to the unique channel environment of each user without sacrificing reliability.
29 Citations
27 Claims
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1. A method for managing a communications link, the method comprising the steps of:
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continuously monitoring a quality parameter of the link, the link providing a satellite-based packet data service to a user terminal;
reducing a short-term sensitivity of the quality parameter such that a modified quality parameter results; and
adapting an operating parameter of the link based on the modified quality parameter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method for participating in a communications link, the method comprising the steps of:
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receiving a power attenuation request (PAR) from a forward link, where the forward link transfers packet data from a satellite-based network;
adjusting a transmitted power level based on the PAR; and
transmitting a power attenuation notification (PAN) over a reverse link, where the reverse link transfers packet data to the satellite-based network. - View Dependent Claims (18)
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19. A method for participating in a communications link, the method comprising the steps of:
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receiving bursts from a forward link where the forward link transfers packet data from a satellite-based network;
generating a signal quality measure (SQM) such that the SQM characterizes a forward link channel quality; and
transmitting a signal quality indicator report (SQIR) over a reverse link based on the SQM where the reverse link transfers packet data to the satellite-based network. - View Dependent Claims (20, 21)
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22. A method for managing a plurality of communications links with a satellite communications network, the method comprising the steps of:
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continuously monitoring quality parameters of the links, the links providing a satellite-based packet data service to a plurality of user terminals within a coverage area of one or more geosynchronous satellites;
reducing a short-term sensitivity of the quality parameters such that modified quality parameters result;
adapting operating parameters of the links based on the modified quality parameters;
the monitoring step including the steps of;
obtaining signal quality indicator reports (SQIRs), the SQIRs characterizing a forward link channel quality where the forward links transfer packet data from the network to the user terminals; and
obtaining power attenuation notifications (PANs), the PANs characterizing a reverse link channel quality where the reverse links transfer packet data from the user terminals to the network. - View Dependent Claims (23, 24, 25)
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26. A satellite access station comprising:
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a packet base station subsystem for monitoring quality parameters of a plurality of communications links, the links providing a satellite-based packet data service to a plurality of user terminals within a coverage area of one or more geosynchronous satellites;
a network switching subsystem providing a switching interface between the packet base station subsystem and a packet-switched network;
said packet base station subsystem adapting operating parameters of the links based on the quality parameters. - View Dependent Claims (27)
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Specification