Method and system for fast channel change in a communication device
View Patent ↗A stream request is generated based on the stream address of a corresponding program selected from an electronic program guide that associates programs with corresponding IP multicast stream addresses by a subscriber/user device. The stream request is sent from the subscriber device to a broadband device, which compares the address in the request to available stream information listed in a content guide. The content guide contains information for all multicast streams that are available from a CMTS to the broadband device over DS channels of the current MAC domain. The broadband device locks to the stream that corresponds to the request, including tuning to a different DS channel if necessary. The broadband device may request another MAC domain if the stream is not available from the current one. After locking to a desired stream, the broadband device informs the CMTS so that it can adjust content guide user counts.
1. A method for selecting from among a plurality of program streams delivered from a CMTS, comprising:
locking the broadband device to a first downstream channel in a first MAC domain;
receiving program stream information for each of the plurality of multicast program streams available at a broadband device, the multicast program streams being available on one or more channels received by the broadband device, the program stream information comprising information about which of a plurality of downstream channels includes a particular multicast program stream;
storing the program stream information in a memory at the broadband device;
displaying program information associated with available multicast programs;
selecting a desired multicast program from the displayed program information;
comparing the received program stream information with details of the selected multicast program;
if it is determined that the received program stream information includes information associated with the selected multicast program, generating a local stream request to a broadband device that includes program information corresponding to the desired multicast program, and locking the broadband device to a new downstream channel associated with the desired multicast program stream corresponding to the local stream request without issuing a channel change request to a headend device;
and if it is determined that the program stream information does not include information associated with the selected multicast program, requesting from the head end the selected multicast program, informing the CMTS of the new downstream channel to which the broadband device is currently tuned, and informing the CMTS of the current multicast program stream to which the broadband device is locked.
2. The method of claim 1 wherein the plurality of program streams are delivered from a single MAC domain.
3. The method of claim 1 wherein stream information for each of the plurality of program streams includes BPI and PHS information corresponding to the respective stream.
4. The method of claim 1 wherein locking includes tuning to a different channel frequency.
5. The method of claim 4 wherein the stream information composes a content guide corresponding to the downstream channel to which the CM is tuned.
6. The method of claim 5 wherein a desired program stream is an IP multicast stream.
7. The method of claim 6 wherein the content guide includes a list of IP multicast streams available on the corresponding downstream channel.
8. The method of claim 1 further comprising receiving updated content guide information that includes a new downstream frequency and program stream identifier for the stream to which the user device is locked.
9. The method of claim 1 wherein the program information includes an electronic program guide.
10. The method of claim 1 wherein the program information includes a web page.
11. A method for selecting from among a plurality of program streams delivered from a CMTS, comprising:
transmitting program stream information for each of the plurality of program streams to a broadband device associated with a first downstream channel to which the broadband device is tuned,
receiving from the broadband device information of a second downstream channel to which the broadband device is currently tuned;
receiving from the broadband device information of the current program stream to which the broadband device is locked; and
updating, based on the information of the current program streams received from one or more broadband devices, a user count to reflect the number of subscribers that are locked to each of the plurality of streams; and
wherein if it is determined by the broadband device that information associated with the content on the second downstream channel is contained in the program stream information, the information of the second downstream channel to which the broadband device is currently tuned is received without receiving a channel change request from the broadband device, and wherein if it is determined by the broadband device that information associated with the content on the second downstream channel is not contained in the program stream information, the information of the second downstream channel to which the broadband device is currently tuned is received after receiving a channel change request from the broadband device.
12. The method of claim 11 wherein the plurality of program streams are transmitted from a single MAC domain.
13. The method of claim 11 wherein stream information for each of the plurality of program streams includes BPI and PHS information corresponding to the respective stream.
14. The method of claim 11 wherein locking includes a broadband device tuning to a different channel frequency.
15. The method of claim 14 wherein the stream information composes a content guide corresponding to the downstream channel to which the broadband device is tuned.
16. The method of claim 15 wherein a desired program stream is an IP multicast stream.
17. The method of claim 16 wherein the content guide includes a list of IP multicast streams available on the corresponding downstream channel.
18. The method of claim 11 further comprising transmitting updated content guide information that includes a new downstream frequency associated with the program stream identifier for the stream to which the broadband device is locked.
19. The method of claim 18 further comprising transmitting a DCC message instructing one or more broadband devices to tune to a different channel frequency to continue receiving the program stream they are currently receiving.
20. A system for selecting from among a plurality of program streams delivered from a CMTS, comprising:
means for receiving program stream information for each of the plurality of program streams at a broadband device,
means for storing the program stream information at the broadband device;
means for displaying program information;
means for selecting a desired program from the displayed program information;
means for comparing the received program stream information with details of the selected program;
means for generating a local stream request to a cable modem that includes program information corresponding to the desired program;
means for locking the broadband device to the desired program stream that corresponds to the stream request without transmitting a channel change request to a headend device if it is determined that the received program stream information includes information associated with the selected multicast program;
means for requesting the selected program from a head end device if it is determined that the program stream information does not include information associated with the selected program;
means for informing the CMTS of the current downstream channel to which the broadband device is currently tuned;
means for informing the CMTS of the current program stream to which the broadband device is locked.