Method and system for moving distinctive traffic flows to a different priority service flow
A cable modem termination system (CMTS) is adapted to move particular traffic flows to a different priority service flow. The CMTS includes detection logic, or is coupled to detection logic, to detect the presence of particular traffic, logic to establish a different priority service flow between a cable modem termination system and a cable modem, and flow control logic to direct a given packet on to the different priority service flow if the given packet contains information that matches one or more classifiers.
1. A method for moving peer-to-peer traffic flows to a lower priority service flow comprising:
in response to detecting the presence of peer-to-peer traffic, if at least one upstream and downstream service flows that already exist for the peer-to-peer traffic is not a low priority service flow, establishing separate upstream and downstream service flows between a cable modem termination system and a cable modem; wherein establishing the service flows further comprises:
establishing at least one of the service flows as a low priority service flow; directing a given packet onto the low priority service flow if the given packet contains information that matches one or more classifiers; wherein
the classifiers are installed into a memory under control of a cable modem termination system, the cable modem termination system checking that the cable modem is correctly classifying packets on the upstream service flow; if a low-priority service flow between the cable modem termination system and the cable modem already exists, directing packets of the peer-to-peer traffic to the existing low-priority service flow;
wherein directing packets of the peer-to-peer traffic to the existing low-priority service flow further comprises:
employing a Data Over Cable Service Interface Specification (DOCSIS) Dynamic Service Change exchange to install additional classifiers at the cable modem or cable modem termination system to identify the peer-to-peer traffic, so that packets that match the classifiers are directed to the existing low-priority service flow; and in response to detecting the service flow as carrying no traffic for a predetermined period of time, the cable modem termination system exchange DOCSIS Dynamic Service Delete messages with the cable modem to delete the service flow.
2. The method for moving peer-to-peer traffic flows to a lower priority service flow of claim 1 , wherein establishing a low priority service flow between a cable modem termination system and a cable modem further comprises: generating a dynamic service message for transmission to the cable modem and transmitting the dynamic service message to the cable modem.
3. The method for moving peer-to-peer traffic flows to a lower priority service flow of claim 1 , wherein directing a given packet onto the low priority service flow if the given packet contains information that matches one or more classifiers further comprises: selecting one or more classifiers to be used for determining whether a packet from among a plurality of traffic packets is associated with a peer-to-peer traffic stream; and comparing each of the traffic packets from among the plurality of traffic packets with the one or more classifiers to determine if a match exists.
4. The method for moving peer-to-peer traffic flows to a lower priority service flow of claim 1 , wherein establishing a low priority service flow between a cable modem termination system and a cable modem further comprises:
the cable modem termination system exchanging DOCSIS Dynamic Service Add (DSA) messages with the cable modem, the DSA messages naming upstream and-or downstream service classes, so that the newly-created low priority service flow has pre-defined quality of service properties that have been set in advance by a system operator.
5. A system for moving peer-to-peer traffic flows to a lower priority service flow comprising:
A non-transitory machine memory embodying logic, when executed by a processor, operable to perform operations comprising:
to detect the presence of peer-to-peer traffic; the machine memory embodying logic to establish, if at least one upstream and downstream service flows that already exist for the peer-to-peer traffic is not a low priority service flow, separate upstream and downstream service flows between a cable modem termination system and a cable modem; wherein establishing the service flows further comprises establishing at least one of the service flows as a low-priority service flow;
to direct a given packet onto the low priority service flow if the given packet contains information that matches one or more classifiers; the classifiers installed into the machine memory under control of the cable modem termination system, the cable modem termination system checking that the cable modem is correctly classifying packets on the upstream service flow;
to determine if a low-priority service flow between the cable modem termination system and the cable modem already exists, and if so, to direct packets of the peer-to-peer traffic to the existing low-priority service flow; and
to employ a Data Over Cable Service Interface Specification (DOCSIS) Dynamic Service Change exchange to install additional classifiers at the cable modem and cable modem termination system to identify the peer-to-peer traffic, so that packets that match the classifiers are directed to the existing low-priority service flow; and in response to detecting the service flow as carrying no traffic for a predetermined period of time, the cable modem termination system exchange DOCSIS Dynamic Service Delete messages with the cable modem to delete the service flow.
6. The system of claim 5 , further comprising: logic to generate a dynamic service message for transmission to the cable modem and to transmit the dynamic service message to the cable modem.
7. The system of claim 5 , further comprising: logic to select one or more classifiers to be used for determining whether a packet from among a plurality of traffic packets is associated with a peer-to-peer traffic stream; and classification logic to compare each of the traffic packets from among the plurality of traffic packets with the one or more classifiers to determine if a match exists.
8. The system of claim 5 , further comprising: logic to exchange DOCSIS Dynamic Service Add (DSA) messages with the cable modem, the DSA messages naming upstream or downstream service classes, so that the newly-created low- priority service flow has pre-defined quality of service properties that have been set in advance by a system operator.
9. A cable modem termination system (CMTS) adapted to move peer-to- peer traffic flows to a lower-priority service flow, the CMTS comprising:
A non-transitory machine memory embodying logic, when executed by a processor, operable to perform operations comprising:
to detect the presence of peer-to-peer traffic; the machine memory embodying logic to establish, if at least one upstream and downstream service flows that already exist for the peer-to-peer traffic is not a low priority service flow, separate upstream and downstream service flows between a cable modem termination system and a cable modem; wherein establishing the service flows further comprises establishing at least one of the service flows as a low-priority service flow;
to direct a given packet onto the low priority service flow if the given packet contains information that matches one or more classifiers; the classifiers installed into the machine memory under control of the cable modem termination system, the cable modem termination system checking that the cable modem is correctly classifying packets on the upstream service flow;
to determine if a low-priority service flow between the cable modem termination system and the cable modem already exists, and if so, to direct packets of the peer-to-peer traffic to the existing low-priority service flow; and
to employ a Data Over Cable Service Interface Specification (DOCSIS) Dynamic Service Change exchange to install additional classifiers at the cable modem and cable modem termination system to identify the peer-to-peer traffic, so that packets that match the classifiers are directed to the existing low-priority service flow; and in response to detecting the service flow as carrying no traffic for a predetermined period of time, the cable modem termination system exchange DOCSIS Dynamic Service Delete messages with the cable modem to delete the service flow.
10. The CMTS of claim 9 , further comprising:
logic to generate a dynamic service message for transmission to the cable modem and to transmit the dynamic service message to the cable modem.
11. The CMTS of claim 9 , further comprising:
logic to select one or more classifiers to be used for determining whether a packet from among a plurality of traffic packets is associated with a peer-to-peer traffic stream; and classification logic to compare each of the traffic packets from among the plurality of traffic packets with the one or more classifiers to determine if a match exists.
12. The CMTS of claim 9 , further comprising: logic to exchange DOCSIS Dynamic Service Add (DSA) messages with the cable modem, the DSA messages naming upstream and-or downstream service classes, so that the newly-created low priority service flow has pre-defined quality of service properties that have been set in advance by a system operator.
13. A method for assigning traffic having distinctive characteristics to a particular low-priority service flow, comprising:
in response to detecting the presence of the distinctive characteristics, and if at least one upstream and downstream service flows that already exist for the particular service flow is not a low priority service flow, establishing the particular service flow as one of a pair of separate upstream and downstream service flows between a cable modem termination system and a cable modem; wherein establishing the pair of separate service flows further comprises establishing at least one of the pair of separate service flows as a low priority service flow; and directing packets of the traffic onto the particular service flow if the packets match the distinctive characteristics; the distinctive characteristics represented as classifiers installed into a machine memory under control of the cable modem termination system, the cable modem termination system checking that the cable modem is correctly classifying packets on the upstream service flow;
determining if a low-priority service flow between the cable modem termination system and the cable modem already exists, and if so, to direct packets of the peer-to-peer traffic to the existing low-priority service flow, wherein directing packets of the peer-to-peer traffic to the existing low-priority service flow; and
employing a Data Over Cable Service Interface Specification (DOCSIS) Dynamic Service Change exchange to install additional classifiers at the cable modem and cable modem termination system to identify the peer-to-peer traffic, so that packets that match the classifiers are directed to the existing low-priority service flow; and
in response to detecting the service flow as carrying no traffic for a predetermined period of time, the cable modem termination system exchange DOCSIS Dynamic Service Delete messages with the cable modem to delete the service flow.
14. The method of claim 13 , further comprising:
establishing the particular service flow by generating a dynamic service message for transmission to the cable modem and transmitting the dynamic service message to the cable modem.