Scheduled sms (gnokii-smsd-mysql)?

Question

MySQL

Good afternoon!
Task :
Notify users according to a given schedule (date \ exact time), the schedule changes monthly.
Make a request to enter the schedule, no problem. There is no understanding of how to send SMS correctly?
My understanding:
1. Add a table to the smsd.schedule database with a schedule
2. Add a table to the smsd.phone database with phones and a name to call
3. Write a script to insert into the smsd.outbox table when the time approaches from the system time?
4. The crone is responsible for the script (it is possible to restart every day)
What has been done now :
Sms is sent to the number correctly, everything is configured according to the instructions wiki.gnokii.org/index.php/SMSD#SMSD.
Perhaps you know about a beautiful implementation?
Used by: Debian, gnokii, mysql, modem for sms
Thanks.
ps is being made for a non-commercial project.