Optical network system and method for supporting upstream signals propagated according to a cable modem protocol
First Claim
1. A method for supporting upstream signals propagated according to a cable modem protocol sent over an optical network comprising:
- receiving the upstream signals;
monitoring a downstream time synchronization produced by the cable modem protocol;
adding a time stamp to the upstream signals with a time stamp device which is independent of the cable modem protocol and the stamp not being processed by the cable modem protocol but based on the downstream time synchronization, the time stamp compensating for propagation delays caused by digital switching in the optical network;
converting the upstream signals into the optical domain for propagation through the optical network; and
sending the upstream optical signals over the optical network to a cable modem termination system operating according to the cable modem protocol.
12 Assignments
0 Petitions
Accused Products
Abstract
A modification to a cable modem termination system (CMTS) can include instructing the CMTS to ignore or skip steps of its timing algorithm so that upstream cable modem signals are controlled only by the upstream protocol of the optical network system. According to another exemplary aspect, a time stamp can be added to the upstream cable modem signals so that the CTMS timing scheme can be used. This time stamp can be used in the data service hub to adjust for the delays that occur while the upstream cable modem signals are sent across the optical network. Another adjustment of the CMTS timing scheme can include using less than a total number of miniature time slots for upstream cable modem transmissions. According to another exemplary aspect, a cable modem termination system can be positioned within a laser transceiver node or a subscriber optical interface.
199 Citations
15 Claims
-
1. A method for supporting upstream signals propagated according to a cable modem protocol sent over an optical network comprising:
-
receiving the upstream signals; monitoring a downstream time synchronization produced by the cable modem protocol; adding a time stamp to the upstream signals with a time stamp device which is independent of the cable modem protocol and the stamp not being processed by the cable modem protocol but based on the downstream time synchronization, the time stamp compensating for propagation delays caused by digital switching in the optical network; converting the upstream signals into the optical domain for propagation through the optical network; and sending the upstream optical signals over the optical network to a cable modem termination system operating according to the cable modem protocol. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A method for supporting upstream signals propagated according to a cable modem protocol sent over an optical network comprising:
-
overriding a time synchronization routine of the cable modem protocol by ignoring unique response time intervals assigned to one or more cable modem devices with a cable modem termination system; receiving upstream cable modem signals based on an upstream protocol of the optical network that is different from the cable modem protocol; and processing the upstream cable modem signals with the cable modem termination system. - View Dependent Claims (11, 12, 13, 14, 15)
-
Specification