Using dedicated upstream channel(s) for cable modem initialization

• US 8,605,747 B2
• Filed: 05/23/2011
• Issued: 12/10/2013
• Est. Priority Date: 07/15/2003
• Status: Active Grant

• Current Assignee: Juniper Networks Incorporated
• Original Assignee: Juniper Networks Incorporated
• Inventors: Beser, Nurettin Burcak
• Primary Examiner(s): WONG, XAVIER S
• Application Number:
  US13/113,166
• Publication Number:
  US 20110222558A1
• Time in Patent Office: 932 Days
• Field of Search: None
• US Class Current: 370/468
• CPC Class Codes: H04L 12/6418 Hybrid transport
• CPC Class Codes: H04N 21/42676 for modulating an analogue carrier signal to encode digital information or demodulating it to decode digital information, e.g. ADSL or cable modem
• CPC Class Codes: H04N 21/4432 Powering on the client, e.g. bootstrap loading using setup parameters being stored locally or received from the server resetting in general G06F1/14; program loading or initiating in general G06F9/445; bootstrapping in general G06F9/4401; secure boots of computer platforms G06F21/57
• CPC Class Codes: H04N 21/4436 Power management, e.g. shutting down unused components of the receiver power management in computer systems G06F1/3203; hibernate or awake process in computer systems G06F9/4418
• CPC Class Codes: H04N 21/6168 involving cable transmission, e.g. using a cable modem
• CPC Class Codes: H04N 7/17309 Transmission or handling of upstream communications

Abstract

A system facilitates initialization of devices in a cable modem network. The system may provide downstream channels for transmitting data to the devices and upstream channels for receiving data from the devices. At least one of the upstream channels may be dedicated to providing initialization opportunities. This dedicated upstream channel(s) includes less than all of the upstream channels. The system may transmit upstream channel identifiers on the downstream channels, where each of the upstream channel identifiers identifies one of the upstream channels. The system receives initialization data on the dedicated upstream channel(s).

Claims

1. A method comprising:

determining, by a network device, whether a first upstream channel, of a plurality of upstream channels, comprises a first type of upstream channel or a second type of upstream channel,

the first type of upstream channel providing initialization opportunities,

the second type of upstream channel providing no initialization opportunities, and

data being provided via the second type of upstream channel while the first type of upstream channel provides the initialization opportunities;

initializing, by the network device and when the first upstream channel comprises the first type of upstream channel, the network device;

determining, by the network device and when the first upstream channel comprises the second type of upstream channel, whether a second upstream channel, of the plurality of upstream channels, comprises the first type of upstream channel based on an upstream channel descriptor corresponding to the second upstream channel,

the upstream channel descriptor being received by the network device via a downstream channel; and

initializing, by the network device and when the second upstream channel comprises the first type of upstream channel, the network device.

2. The method of claim 1, where only one of the plurality of upstream channels comprises the first type of upstream channel.

3. The method of claim 1, where at least two, but fewer than all, of the plurality of upstream channels comprise the first type of upstream channel.

4. The method of claim 1, further comprising:

receiving a plurality of descriptors,

the plurality of descriptors including the upstream channel descriptor, and

reading the second upstream channel based the upstream channel descriptor.

5. The method of claim 4, where the plurality of descriptors include an equal quantity of descriptors corresponding to the first type of upstream channel and the second type of upstream channel.

6. The method of claim 4, where the plurality of descriptors include a first quantity of descriptors corresponding to the first type of upstream channel that is greater than a second quantity of descriptors corresponding to the second type of upstream channel.

7. The method of claim 1, where initializing the network device includes:

transmitting a registration packet via the first type of upstream channel.

8. A system comprising:

at least one device to;

determine whether a first upstream channel, of a plurality of upstream channels, comprises a first type of upstream channel or a second type of upstream channel,

the first type of upstream channel providing initialization opportunities,

the second type of upstream channel providing no initialization opportunities, and

data being provided via the second type of upstream channel while the first type of upstream channel provides the initialization opportunities,

initialize, when the first upstream channel comprises the first type of upstream channel, the at least one device,

determine, when the first upstream channel comprises the second type of upstream channel, whether a second upstream channel, of the plurality of upstream channels, comprises the first type of upstream channel based on an upstream channel descriptor corresponding to the second upstream channel,

the upstream channel descriptor being received by the at least one device via a downstream channel, and

initialize, when the second upstream channel comprises the first type of upstream channel, the at least one device.

9. The system of claim 8,

where the at least one device is further to:

receive a plurality of descriptors,

the plurality of descriptors including the upstream channel descriptor, and

where, when determining whether the second upstream channel comprises the first type of upstream channel, the at least one network device is to;

read the second upstream channel based on the upstream channel descriptor.

10. The system of claim 9, where the descriptors include an equal number of descriptors corresponding to each of the first type of upstream channel and the second type of upstream channel.

11. The system of claim 9, where the descriptors include a first quantity of descriptors corresponding to the first type of upstream channel that is greater than a second quantity of descriptors corresponding to the second type of upstream channel.

12. The system of claim 8, where, when initializing the at least one device, the at least one device is to:

transmit a registration packet via the first type of upstream channel.

13. The system of claim 8,

where the at least one device comprises a cable modem, and

where, when initializing the cable modem, the cable modem is to:

transmit a registration packet to a cable modem termination system.

14. The method of claim 8, where only one of the plurality of upstream channels comprises the first type of upstream channel.

15. A system comprising:

one or more processors are to;

receive first data over a first plurality of upstream channels from a first group of downstream devices,

the first plurality of upstream channels including a first upstream channel and one or more first different upstream channels;

receive second data over a second plurality of upstream channels from a second group of downstream devices,

the second plurality of upstream channels including a second

upstream channel and one or more second different upstream channels;

process third data transmitted over the first upstream channel and the second upstream channel,

the third data including a portion of the first data and a portion of the second data,

the first data transmitted over the first upstream channel including initialization opportunities associated with the first group of downstream devices, and

the second data transmitted over the second upstream channel including initialization opportunities associated with the second group of downstream devices; and

transmit, via a downstream channel and to a particular device of the first group of downstream devices, an upstream channel descriptor corresponding to the first upstream channel.

16. The system of claim 15, where the system comprises a cable modem termination system.

17. The system of claim 15,

where the system includes a receiver, a first input port, and a second input port,

where the receiver processes the third data, and

where the receiver selectively connects to the input port to process the portion of the first data transmitted over the first upstream channel and selectively connects to the second input port to process the portion of the second data transmitted over the second upstream channel.

18. The system of claim 15,

where the system transmits a plurality of upstream channel descriptors, corresponding to the first plurality of upstream channels and the second plurality of upstream channels, to the first group of downstream devices and the second group of downstream devices,

where the plurality of upstream channel descriptors include an upstream channel descriptor, and

where the one or more processors are to:

receive initialization opportunities over the first upstream channel and the second upstream channel based on transmitting the plurality of upstream channel descriptors.

19. The system of claim 18,

where each of the first group of downstream devices receive an equal number of the plurality of upstream channel descriptors, and

where each of the second group of downstream devices receive an equal number of the plurality of upstream channel descriptors.

20. The system of claim 18, where a first quantity of the plurality of upstream channel descriptors corresponding to the first upstream channel is greater than a second quantity of the plurality of upstream channel descriptors corresponding to another upstream channel of the one or more first different upstream channels.