Upstream transmission using multiple transmission tags and downstream acknowledgements in conditional access packets
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United States of America Patent
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May 14, 1996
Grant Date -
N/A
app pub date -
Mar 2, 1995
filing date -
Mar 2, 1995
priority date (Note) -
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status (Latency Note)
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Abstract
Upstream transmissions in a two-way communications network are effected from subscriber terminals in upstream packets having one of a plurality of different separately acknowledgeable acknowledgment tags. Downstream acknowledgments of upstream messages are contained in CA packets multiplexed with product packets to form a transport bitstream. The transport bitstream is applied to a digital conditional access module (DCAM) in the terminal which is controlled by the conditional access data bits of the CA packets. The DCAM includes a status register for storing the acknowledgment bits of the CA packets, which bits are coupled by a microprocessor for controlling the upstream transmitter.
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