Method and system for denying cable modem access to a broadband network
View Patent ↗A device, such as a cable modem or embedded media terminal adaptor that attempts to obtain unauthorized network services, is designated by head end equipment, such as a CMTS, as being a ‘rogue’ device. Upon an initial range request from the rogue device, the CMTS responds with a continuing range command. Upon receiving each periodic range request transmitted from the rogue device during a periodic station maintenance opportunity, the CMTS responds with another continuing range command. Thus, the rogue device does not ever establish connection with the CMTS because an ACK message is not received back from the CMTS. Moreover, use of CMTS resources for processing request from rogue devices is minimized because the rogue device does not reinitialize its MAC after a predetermined period of time, which it would do if a periodic ranging opportunity was not scheduled.
1. A method for denying a user device access to bandwidth over a broadband network, comprising:
receiving a first ranging request message from a user device in response to a first ranging opportunity;
determining that the first ranging request message is from a rogue device;
transmitting the first ranging continue message to the rogue device in response to the first ranging request from the rogue device;
transmitting to the rogue device a periodic ranging opportunity;
receiving a response to the periodic ranging opportunity from the rogue device;
transmitting a second ranging continue message in response to the rogue device's response to the periodic ranging opportunity; and
preventing the rogue device from completing registration by transmitting subsequent ranging continue messages to the rogue device in response to any further responses by the rogue device to any subsequent periodic ranging opportunities.
2. The method of claim 1 wherein the user device includes a cable modem.
3. The method of claim 1 wherein the user device includes an embedded media terminal adapter.
4. The method of claim 1 wherein the broadband network comprises a hybrid fiber coaxial network.
5. The method of claim 1 wherein the first ranging continue message comprises a RNG-RSP message having a status of ‘continue’.
6. A method for denying a user device access to bandwidth service over a broadband network, comprising:
attempting to access unauthorized service;
receiving a first ranging opportunity in at least one bandwidth map;
transmitting a response to the first ranging opportunity;
receiving a first ranging continue message in response to the first ranging request transmitted during the first ranging opportunity;
sending responses to subsequent ranging opportunities; and
continuing to receive subsequent continue ranging messages.
7. The method of claim 6 wherein the user device includes a cable modem.
8. The method of claim 6 wherein the user device includes an embedded media terminal adapter.
9. The method of claim 6 wherein the broadband network comprises a hybrid fiber coaxial network.
10. The method of claim 6 wherein the first ranging continue message comprises a RNG-RSP message having a status of ‘continue’.
11. The method of claim 1 wherein the second ranging continue message comprises a RNG-RSP message having a status of ‘continue’.
12. The method of claim 6 wherein each of the subsequent continue ranging messages comprises a RNG-RSP message having a status of ‘continue’.
13. The method of claim 6 wherein the first ranging opportunity comprises an initial broadcast ranging opportunity.
14. The method of claim 1 wherein the first ranging opportunity comprises an initial broadcast ranging opportunity.
15. The method of claim 1 wherein determining that the first ranging request message is from a rogue device comprises:
maintaining data that can be used to identify whether a user device comprises at least one rogue device.
16. The method of claim 15 wherein the data comprises a media access control address.
17. The method of claim 1 wherein the broadband network comprises a DOCSIS broadband access network.