High speed data service via satellite modem termination system and satellite modems
First Claim
1. A satellite communication system, comprising:
- a satellite earth station operably coupled to at least one data network; and
a plurality of satellite modems, each satellite modem configured to communicate with the satellite earth station via at least one servicing satellite,wherein the satellite earth station includes;
a host processor configured to receive data packets from the at least one data network,a Data Over Cable Service Interface Specification (DOCSIS) Media Access Control (MAC) configured to format the data packets into one or more Moving Picture Experts Group (MPEG) frames,a satellite modulator, coupled to the DOCSIS MAC, configured to modulate the one or more MPEG frames based upon a selected modulation scheme from among a plurality of modulation schemes and a selected code rate from among a plurality of code rates to provide downstream output data for transmission to at least one of the plurality of satellite modems, the satellite modulator including;
a plurality of queues, each queue configured to store the one or more of the MPEG frames based upon a modulation scheme and a code rate to provide a queue block of data, the plurality of queues being configured such that each queue corresponds to a possible combination of modulation scheme and code rate among a plurality of possible combinations of modulation schemes and code rates,a multirate turbo encoder configured to receive the queue block of data from a selected queue from the plurality of queues and to encode the queue block of data using the code rate associated with the selected queue to provide an inner encoded data block,a modulator configured to modulate the inner encoded data block using the modulation scheme associated with the selected queue to provide the downstream output data.
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Accused Products
Abstract
A satellite communication system includes a satellite earth station operably coupled to a data network, and a plurality of satellite modems, each satellite modem of the plurality of satellite modems communicating in an upstream and downstream data communication mode with the satellite earth station via at least one servicing satellite. The satellite earth station includes a host processor for receiving data packets from the data network and processing DOCSIS management packets, a DOCSIS MAC coupled to the host processor for encrypting the transmit packet data from the host memory, framing data in MAC headers and inserting MAC timestamps in the transmit packet data, a satellite modulator coupled to the DOCSIS MAC for modulating the encrypted transmit packet data to generate downstream output data for transmission to at least one of the plurality of satellite modems, a burst demodulator for demodulating upstream data received from at least one of the plurality of satellite modems, and a turbo decoder coupled to the burst demodulator and the DOCSIS MAC for turbo decoding the demodulated data from the burst demodulator and sending the decoded data to the DOCSIS MAC. The DOCSIS MAC sends DOCSIS management packets portion of the decoded data to the host processor and sends transmit packet data portion of the decoded data to the data network.
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Citations
15 Claims
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1. A satellite communication system, comprising:
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a satellite earth station operably coupled to at least one data network; and a plurality of satellite modems, each satellite modem configured to communicate with the satellite earth station via at least one servicing satellite, wherein the satellite earth station includes; a host processor configured to receive data packets from the at least one data network, a Data Over Cable Service Interface Specification (DOCSIS) Media Access Control (MAC) configured to format the data packets into one or more Moving Picture Experts Group (MPEG) frames, a satellite modulator, coupled to the DOCSIS MAC, configured to modulate the one or more MPEG frames based upon a selected modulation scheme from among a plurality of modulation schemes and a selected code rate from among a plurality of code rates to provide downstream output data for transmission to at least one of the plurality of satellite modems, the satellite modulator including; a plurality of queues, each queue configured to store the one or more of the MPEG frames based upon a modulation scheme and a code rate to provide a queue block of data, the plurality of queues being configured such that each queue corresponds to a possible combination of modulation scheme and code rate among a plurality of possible combinations of modulation schemes and code rates, a multirate turbo encoder configured to receive the queue block of data from a selected queue from the plurality of queues and to encode the queue block of data using the code rate associated with the selected queue to provide an inner encoded data block, a modulator configured to modulate the inner encoded data block using the modulation scheme associated with the selected queue to provide the downstream output data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification