Virtual upstream channel provisioning and utilization in broadband communication systems

• US 8,595,367 B1
• Filed: 09/17/2008
• Issued: 11/26/2013
• Est. Priority Date: 08/21/2001
• Status: Active Grant

• Current Assignee: Juniper Networks Incorporated
• Original Assignee: Juniper Networks Incorporated
• Inventors: Beser, Nurettin Burcak
• Primary Examiner(s): Pollack, Melvin H
• Application Number:
  US12/212,187
• Time in Patent Office: 1,896 Days
• Field of Search: 709/228, 370/350
• US Class Current: 709/228
• CPC Class Codes: H04J 3/1682 Allocation of channels according to the instantaneous demands of the users, e.g. concentrated multiplexers, statistical multiplexers
• 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 method and apparatus for provisioning virtual upstream channels within one physical upstream channel. Each virtual upstream channel is assigned to a group of cable modems that share certain operational parameters. New virtual upstream channels can be provisioned as needed and existing virtual upstream channels can be deleted, as needed.

Claims

1. A system comprising:

a first network device to;

receive a message, from a second network device, at a port of the first network device,

the message including a Media Access Controller (MAC) address of the second network device,

and

the first network device being different from the second network device;

assign a unique upstream channel identifier to the second network device,

the unique upstream channel identifier identifying a particular virtual upstream channel of a plurality of virtual upstream channels of a physical upstream channel,

the unique upstream channel identifier being assigned based on;

the MAC address included in the message received from the second network device, and

the port of the first network device; and

forward the unique upstream channel identifier to the second network device to cause the second network device to transmit data using the particular virtual upstream channel of the physical upstream channel.

2. The system of claim 1, where the first network device is further to:

create the plurality of virtual upstream channels based on the physical upstream channel,

data being transmitting to a plurality of groups of network devices via the physical upstream channel.

3. The system of claim 2, where the first network device is further to:

assign each group of network devices of the plurality of groups of network devices to a different virtual upstream channel of the plurality of virtual upstream channels.

4. The system of claim 3, where the first network device is further to:

send, in a MAC management message, the unique upstream channel identifier to one or more network devices, of the plurality of groups of network devices, to provision the one or more network devices,

where the one or more network devices include the second network device

where each network device, of the plurality of groups of network devices, transmits data on a respective one of the plurality of virtual upstream channels.

5. The system of claim 4, where the first network device is further to:

determine operational parameters of network devices of the plurality of groups of network devices,

where the determined operational parameters include at least one of a modulation scheme associated with the network devices or latency associated with the network devices; and

group the network devices based on the determined operational parameters.

6. The system of claim 3, where the first network device is further to:

add a new virtual upstream channel to the plurality of virtual upstream channels after assigning each network device of the plurality of groups of network devices to the different virtual upstream channel of the plurality of virtual upstream channels.

7. The system of claim 5, where the determined operational parameters of the network devices are determined based on MAC addresses of the network devices.

8. The system of claim 5, where the determined operational parameters, of the network devices, further include at least one of a burst profile associated with the network devices or quality of service associated with the network devices.

9. The system of claim 3, where the first network device is further to:

determine a number of network devices, of the plurality of groups of network devices, that can share a particular one of the plurality of virtual upstream channels; and

group network devices, of the number of network devices, based on the number of network devices.

10. A method comprising:

receiving, at a port of a first network device, a message from a second network device of a group of network devices,

the message including a Media Access Controller (MAC) address of the second network device, and

the second network device being different from the first network device;

assigning, by the first network device, a unique upstream channel identifier to the group of network devices,

the unique upstream channel identifier identifying a particular virtual upstream channel of a plurality of virtual upstream channels of a physical upstream channel,

the unique upstream channel identifier being assigned based on;

the MAC address included in the message received from the second network device, and

the port that received the message including the MAC address;

forwarding, by the first network device, the first unique upstream channel identifier to the group of network devices to enable the second network device to transmit data using the particular virtual upstream channel of the physical upstream channel.

11. The method of claim 10, where data is transmitted, via the physical upstream channel, to the group of network devices and another group of network devices,

the method further comprising:

creating the plurality of virtual upstream channels based on the physical upstream channel.

12. The method of claim 11, further comprising:

assigning each of the group of network devices and the other group of network devices to a different virtual upstream channel of the plurality of virtual upstream channels,

where each network device, of the group of network devices and the other group of network devices, uses a respective virtual upstream channel of the plurality of virtual upstream channels to transmit data.

13. The method of claim 10, further comprising:

provisioning network devices, of the group of network devices, by sending, in a MAC management message, the unique upstream channel identifier to each network device, of the group of network devices.

14. The method of claim 12, where assigning each of the group of network devices and the other group of network devices to the different virtual upstream channel of the plurality of virtual upstream channels further comprises:

determining operational parameters of network devices, of the group of network devices and the other group of network devices,

where the determined operational parameters include at least one of a modulation scheme associated with the network devices or latency associated with the network devices; and

grouping the network devices based on the determined operational parameters.

15. The method of claim 10, further comprising:

sending, to the of network devices, a subsequently assigned unique upstream channel identifier as a replacement for the unique upstream channel identifier.

16. The method of claim 12, further comprising:

determining that each virtual upstream channel, of the plurality of virtual upstream channels, does not interfere with a bandwidth allocation of other virtual upstream channels of the plurality of virtual upstream channels.

17. The method of claim 13, further comprising:

deleting one of the plurality of virtual upstream channels after provisioning the network devices.

18. A network device comprising:

one or more processors to;

receive a message, from another network device, at a port of the network device,

the message including a Media Access Controller (MAC) address of the other network device,

and

the network device being different from the other network device;

assign a unique upstream channel identifier to the other network device,

the unique upstream channel identifier identifying a particular virtual upstream channel of a plurality of virtual upstream channels of a physical upstream channel,

the unique upstream channel identifier being assigned based on;

the MAC address included in the message received from the other network device, and

the port of the network device; and

forward the unique upstream channel identifier to the other network device to enable the other network device to transmit data using the particular virtual upstream channel of the physical upstream channel.

19. The network device of claim 18, where the physical upstream channel is associated with a single frequency.

20. The network device of claim 18, where the one or more processors further are to:

determine groups of network devices;

assign, to each of the groups of network devices, a different upstream channel identifier that identifies a different virtual upstream channel of the plurality of virtual upstream channels;

modify the groups of network devices based on a dynamic assessment of operational parameters of a particular network device of the groups of network devices,

where the operational parameters include at least one of a modulation scheme associated with the particular network device or latency associated with the particular network device.