NANC 385

Timer Calculation – Maintenance Window Timer Behavior

Origination Date :07/10/2003



Business Need:

NPAC Timers.  As defined in the FRS, concurrence windows/timers are generated at the time an activity occurs in the NPAC that requires the use of a window/timer.  Specifically, the future expiration time is calculated and stored, based on the NPAC settings, at the time of the activity.  These windows/timers will then expire based on the pre-calculated date/time.  Therefore, a timer is not a meter that “runs” only during the Business Day intervals, but rather is a calculation in GMT of the timer's expiration date/time.

Currently, there are no FRS requirements that address timers and NPAC Maintenance Window time periods.  An operational issue can arise when an NPAC Maintenance Window time period overlaps with normal business operating hours.

This change order proposes an update to the NPAC so that NPAC Maintenance Window time periods will be factored in when calculating timer expiration date/time (i.e., excluding that period of time from the calculation).  This will alleviate the problem where timers expire during the NPAC Maintenance Window time period.

Aug ’03 LNPAWG, discussion:

Sprint PCS offered the following:

1.)   following up on the Jul ’03 mtg comment about SPID profile toggles, after internal discussions it was deemed to be unnecessary to have SPID toggles.

2.)   this functionality was no longer high priority, since it was agreed to shorten the extended Sunday Service Provider Maintenance Window to 8 hours, assuming NPAC stays within the 8 hours for maintenance.

3.)   current concern is that NANC 323 migrations may push maintenance windows beyond the 8 hours.

4.)   this functionality would have to be in place before agreeing to move the extended maintenance window back to 11 hours.

Feb ‘04 – Refer to the Architecture Planning Team’s working document for the latest information on this change order. 

Final Resolution:

Func Backwards Compatible:  YES

The Timer Expiration Calculation will be modified such that a time period designated as an NPAC Maintenance Window that falls within normal business operating hours will NOT “use up” any hours, when calculating the expiration of a timer.  Effectively, the NPAC Maintenance Window time period will be treated the same way as Holidays are currently treated in the NPAC (i.e., excluded from the timer expiration calculation).

This will require entry of Maintenance Window information in the OpGUI by NPAC Personnel (same as Holidays are currently done).

Additionally, a discussion item needs to occur regarding the possible inclusion of Service Provider profile settings to support this new feature.

Implemented in FRS 3.3.0a.

Related Release:

Implemented in FRS 3.3.0a.

Status: Implemented