Paweł Grzesiak, p2grzesiak@gmail.com

Find, analyze, reverse engineer some telco billing/services systems. Model rules using the HeKatE process.

Examples:

• Plus
• Era
• Play
• Orange

• Research PlusGSM
• hekate_case_thermostat

How to describe (ARD chart as well as original rules) services management - dependency between time, duration, payment and packets?

Concept of ARD diagram

Read available materials and documentation about VARDA and ARD+ which are to be found here:

• ARD+ syntax gjn2008flairs-ardformal
• Varda description gjn2008flairs-ardprolog

Installation according to the instructions available here was successfully conducted on a machine running Microsoft® Windows Vista™ Business 64-bit.

The only problem to overcome was that the Windows installer available on the official Graphviz website http://www.graphviz.org/ does not add the folder where these tools are installed (e.g. C:\Program Files\Graphviz 2.21\bin) to the Windows %PATH% environmental variable so I could not run dot.exe directly from the command line.

The solution was as follows:

• Right-click on My Computer | Properties | Advanced | Environment Variables
• Find and edit the Path environmental variable in that dialog
• Add the full path of the Graphviz\bin folder (should be appended to the value of the Path variable, preceded by a semicolon (;))

Compillation according to the instructions available here was successfully conducted under Kubuntu 9.04 32-bit

• Use HJEd tool to build ARD+ and TPH diagrams for PlusGSM Case

// Time of day
Rule: 1   
if 	Hour is between 18 and 23
or 	Hour is between 0 and 5    
then   	Daytime is night

Rule: 2   
if 	Hour is between 6 and 17
then   	Daytime is day

//Day of week
Rule: 3   
if    	Day is mon
or   	Day is tue
or   	Day is wed	
or   	Day is thu	
or   	Day is fri		
then   	Today is workday

Rule: 4   
if   	Day is sat	
or   	Day is sun		
then   	Today is weekend

//Packet choosing
Rule: 5   
if     	ServiceType is MMS
then   	Packets is None

Rule: 6   
if     	ServiceType is SMS
then   	Packets is FreSMS

Rule: 7
if     	ServiceType is CALL and Operator is not PLUS
then	Packets is FA

Rule: 8   
if     	ServiceType is CALL and Operator is PLUS and Today is weekend
then	Packets is FWP;FP;FA

Rule: 9  
if     	ServiceType is CALL and Operator is PLUS and Daytime is night
then	Packets is FWP;FP;FA

Rule: 10   
if     	ServiceType is CALL and Operator is PLUS and Today is not weekend and Daytime is not night
then	Packets is FP;FA

• Official Graphviz website http://www.graphviz.org/
• PlusGSM Taryfy Syberyjskie http://www.plus.pl/oferta_indywidualna/plus_abonament/taryfy/taryfy_syberyjskie/