Upstream transmission using multiple transmission tags and downs

Details Upstream transmission using multiple transmission tags and downs Upstream transmission using multiple transmission tags and downs

1995-03-02

1996-05-14

Chin, Wellington

Multiplex communications

Wide area network

Packet switching

348 10, 348 12, 348 13, 455 42, H04N 716, H04N 116

Patent

active

055175023

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.

REFERENCES:
patent: 4533948 (1985-08-01), McNamara et al.
patent: 4554579 (1985-11-01), Citta
patent: 4633462 (1986-12-01), Stifle et al.
patent: 5371532 (1994-12-01), Gelman et al.

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