Latency Reduction In A Low Power Mode
First Claim
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1. A cable modem configured to operate in a low power mode, comprising:
- an upstream modulator configured to transmit a message to a cable modem termination system;
a downstream de-modulator configured to receive a message from the cable modem termination system; and
a processor coupled to the downstream de-modulator and configured to determine whether the cable modem is inactive for a period of time, to send a sleep request to the cable modem termination system using the upstream modulator if the cable modem is inactive for the period of time, receive a sleep command from the cable modem termination system via the downstream de-modulator in response to the sleep request and operate the cable modem in the low power mode in response to the sleep command.
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Abstract
A two way communication system is adapted to reduce latency while the communications system is operating in a low power mode. The two way communication system includes a local host having a first primary communication channel and a secondary out of band transmitter; and customer premise equipment having a primary communication channel for communicating with the first primary communication channel of the local host and a secondary low power out of band receiver that receives out of band control signals from the out of band transmitter during low power operation of the customer premise equipment.
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Citations
22 Claims
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1. A cable modem configured to operate in a low power mode, comprising:
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an upstream modulator configured to transmit a message to a cable modem termination system; a downstream de-modulator configured to receive a message from the cable modem termination system; and a processor coupled to the downstream de-modulator and configured to determine whether the cable modem is inactive for a period of time, to send a sleep request to the cable modem termination system using the upstream modulator if the cable modem is inactive for the period of time, receive a sleep command from the cable modem termination system via the downstream de-modulator in response to the sleep request and operate the cable modem in the low power mode in response to the sleep command. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 11, 12, 13, 14, 15, 16, 17)
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- 9. The cable modem of clam 1, wherein, in the low power mode, the cable modem is configured to operate a peripheral device coupled to the cable modem in low power mode by transmitting data to the peripheral device that places the peripheral device in a low power mode.
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18. A cable modem termination system configured to operate a cable modem in a low power mode, comprising:
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a downstream modulator configured to transmit a message to the cable modem; an upstream demodulator configured to receive a message from the cable modem; and a processor configured to receive a sleep request from the cable modem via the upstream demodulator, determine whether to grant the sleep request by determining whether the cable modem is inactive for a period of time and transmit a sleep command to the cable modem via the downstream modulator to operate the cable modem in the low power mode if the cable modem is inactive for the period of time. - View Dependent Claims (19, 20, 21, 22)
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Specification