发明名称 |
UPSTREAM TRANSMISSION USING MULTIPLE TRANSMISSION TAGS AND DOWNSTREAM ACKNOWLEDGMENTS IN CONDITIONAL ACCESS PACKETS |
摘要 |
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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申请公布号 |
CA2170785(C) |
申请公布日期 |
2003.04.22 |
申请号 |
CA19962170785 |
申请日期 |
1996.03.01 |
申请人 |
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发明人 |
BESTLER, CAITLIN B.;HARTLEY, HARRY A., III;RABII, KHOSRO M. |
分类号 |
H04J3/16;H04N7/16;H04N7/167;H04N7/173;(IPC1-7):H04L12/56 |
主分类号 |
H04J3/16 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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