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 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, wherein the satellite earth station includes;
a host processor for receiving data packets from the at least one data network and processing the Data Over Cable Service Interface Specification (DOCSIS) management packets, a DOCSIS Media Access Control (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 decoding the demodulated data from the burst demodulator and sending the decoded data to the DOCSIS MAC, wherein 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 at least one data network.
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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
21 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 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, wherein the satellite earth station includes;
a host processor for receiving data packets from the at least one data network and processing the Data Over Cable Service Interface Specification (DOCSIS) management packets, a DOCSIS Media Access Control (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 decoding the demodulated data from the burst demodulator and sending the decoded data to the DOCSIS MAC, wherein 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 at least one data network. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for a satellite communication in compliance with a Data Over Cable Service Interface Specification (DOCSIS) standard, the method comprising:
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receiving a radio frequency (RF) upstream signal;
demodulating the received RF signal to generate soft decision quadraphase-shift keying (QPSK) output signal;
turbo decoding the QPSK output signal;
decoding the turbo decoded output signal by a Reed-Solomon (RS) decoder;
assembling DOCSIS packets in the RS decoded signal; and
forwarding the assembled data to a data network. - View Dependent Claims (15, 16, 17)
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18. A satellite earth station system for upstream and downstream data communication comprising:
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a host computer coupled to a data network for receiving data packets from a data network and processing the Data Over Cable Service Interface Specification (DOCSIS) management packets;
a demodulator/Media Access Control (MAC) card coupled to the host processor including a DOCSIS MAC coupled to the host computer for encrypting transmit packet data from the data network responsive to the processed DOCSIS management packets from the host computer, a burst demodulator for demodulating upstream data received from a satellite modem, and a turbo decoder coupled to the burst demodulator and the DOCSIS MAC for decoding the demodulated data from the burst demodulator and sending the decoded data to the DOCSIS MAC, wherein the DOCSIS MAC sends DOCSIS management packets portion of the decoded data to the host computer and sends transmit packet data portion of the decoded data to the data network; and
a satellite modulator coupled to the demodulator/MAC card for modulating the encrypted transmit packet data from the DOCSIS MAC to generate downstream output data for transmission to the satellite modem. - View Dependent Claims (19, 20, 21)
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Specification