Cisco Model 6109 6 MHz Off-Air Reference (NTSC) Guide De Montage
Chapter 4 Operation
360
78-4021139-01 Rev D
The process, represented by the following illustration, is explained in detail below.
Channel Request
1 hour
LUA
Recapture time
Server sends a
Server sends a
Select Indication
STB Bandwidth Reclaim Timeout
- Display banner (5 min)
- Display banner (5 min)
Recapture Ack Timeout expired (10 min)
-
Video is streaming (no banner).
-
BW can be reclaimed any time after the
BW Ack Timeout expires (if no user
activity).
BW Ack Timeout expires (if no user
activity).
-
Any keystroke prompts the client to send a
LUA. Timers are reset, no BW reclaimed.
LUA. Timers are reset, no BW reclaimed.
Assuming no user activity after the Channel Request, the following sequence of
events occurs.
1 A LUA is sent from the STB to the USRM at the end of the STB Reporting
1 A LUA is sent from the STB to the USRM at the end of the STB Reporting
Interval, logging the time of the channel change request activity, i.e., the last user
activity.
2 Two hours after the last user activity (which, in this case, is the channel change
request), the USRM will send a SelectIndication to the set-top box, causing the
set-top box to display the bandwidth reclamation banner, and start the Recapture
Acknowledgement Time period.
3 At this point, i.e., during the STB Bandwidth Reclaim Timeout period or after,
any user activity (i.e., any remote key press) will immediately prompt the client
to send a LUA to the USRM (since more than 1 STB Reporting Interval has
expired without any user activity). All timers are then reset and bandwidth is not
reclaimed.
4 If the subscriber does not press a remote key, i.e., there is still no user activity,
then after the 5 minute STB Bandwidth Reclaim Timeout expires, the banner is
removed from the screen. Note, however, that the Recapture Acknowledgement
Time is still in effect and bandwidth still cannot be reclaimed at this point.
5 After the 10 minute Recapture Acknowledgement Timeout expires, if the
subscriber still has not pressed a remote key, then the bandwidth is eligible for
reclamation at any time by the USRM.