Network having bandwidth sharing

• US 7,961,753 B1
• Filed: 09/30/2005
• Issued: 06/14/2011
• Est. Priority Date: 07/12/2001
• Status: Expired due to Fees

• Current Assignee: AT&T Intellectual Property II LP (AT&T, Inc.)
• Original Assignee: AT&T Intellectual Property II LP (AT&T, Inc.)
• Inventors: Lai, Wai Sum, Lester, William G., Guha, Arunabha, Segal, Moshe, Choudhury, Gagan Lal
• Primary Examiner(s): Wong; Warner
• Application Number:
  US11/240,078
• Time in Patent Office: 2,083 Days
• Field of Search: 370/341, 370/352, 370/353, 370/354, 370/355, 370/356, 370/389, 370/392, 370/431, 370/437, 725/95, 725/96, 725/129
• US Class Current: 370/458
• CPC Class Codes: H04L 41/0896 Bandwidth or capacity management, i.e. automatically increasing or decreasing capacities flow or congestion control using dynamic resource allocation, e.g. in-call renegotiation, H04L47/76

Abstract

A communication system includes a plurality of devices, such as cable modems, in communication with a station, such as a cable modem termination system, that provides efficient upstream bandwidth sharing.

Claims

1. A method for sharing channel bandwidth, comprising:

dynamically adjusting a placement of voice unsolicited grants within a voice interval of a map interval via a cable modem termination system, by;

packing the voice unsolicited grants in a contiguous manner at a location in the voice interval away from a data+signaling interval of the map interval,

consolidating at least a portion of holes within the map interval,

reducing fragmentation of received packets, and

reducing delay jitter for the voice unsolicited grants, wherein the jitter is caused by movement of the voice unsolicited grants.

2. The method according to claim 1, further including transmitting the map interval on a downstream channel, wherein the map interval defines transmission for an upstream channel.

3. The method according to claim 1, further including generating a map interval for an upstream channel in a DOCSIS network.

4. The method according to claim 3, wherein the upstream channel corresponds to a hybrid-fiber-coax (HFC) connection.

5. The method according to claim 3, further including transmitting the map interval to one or more cable modems in the network.

6. The method according to claim 1, further including locating a request interval and a management interval of the map interval adjacent to each other.

7. The method according to claim 6, further including locating one of the request intervals and the management interval at one end of the map interval.

8. The method according to claim 1, further including assigning a unique service flow ID for each traffic stream.

9. The method according to claim 1, further including placing the voice unsolicited grants contiguously within the voice interval.

10. A method for sharing upstream channel bandwidth in a DOCSIS system, comprising:

transmitting map intervals from a cable modem termination system on a downstream channel to a plurality of cable modems, wherein the map intervals define upstream traffic for the plurality of cable modems for a period of time in the future and that a placement of voice unsolicited grants is dynamically adjusted, by;

packing the voice unsolicited grants in one of a random manner in a voice interval of the map intervals and a contiguous manner at an end of the voice interval located away from a data+signaling interval of the map interval,

consolidating at least a portion of holes within the map interval,

reducing fragmentation of upstream packets, and

reducing delay jitter for voice unsolicited grants, the jitter caused by movement of the voice unsolicited grants.

11. The method according to claim 10, further including partitioning the map intervals into at least a request interval, a management interval, the data+signaling interval, and the voice interval.

12. The method according to claim 11, further including placing the management interval and the request interval together to form a contiguous interval.

13. The method according to claim 12, placing the unsolicited grants contiguously within the voice interval.

14. A method comprising, via a cable modem termination system:

separating a data interval from a voice interval via a soft partition, wherein data traffic is allowed to utilize unused bandwidth in the voice interval, wherein a placement of voice unsolicited grants within the voice interval is dynamically adjusted such that the voice unsolicited grants are packed in one of a random manner in the voice interval and a contiguous manner at a location away from a data+signaling interval, the adjusting functions to reduce at least a portion of holes within the voice interval and reduce fragmentation of received packets, the data traffic having a lower priority than the voice traffic within the voice interval; and

separating the voice interval from the data interval via a hard partition, wherein voice traffic is prohibited from utilizing unused bandwidth in the data interval.

15. The method according to claim 14, further comprising creating the soft partition.

16. The method according to claim 14, further comprising creating the hard partition.

17. The method according to claim 14, further comprising refusing an addition of a new voice unsolicited grant if the hard partition would be exceeded.

18. The method according to claim 14, further comprising allowing use of at least a portion of the unused bandwidth in the voice interval by the data traffic.

19. The method according to claim 14, further comprising removing bandwidth in the voice interval from use by the data traffic when a new voice unsolicited grant is needed and the hard partition would not be exceeded.