How to Calculate a Billing Score
To determine a billing category, a score is calculated based on Internet resource allocations or assignments made to a member over time.
The score of an allocation or assignment is calculated by multiplying the scoring unit for that resource (for example: scoring unit 4 for an IPv4 /19) by the age of the resource (based on a time function: year of the allocation minus the year 1992). The total score (i.e. billing score) is the sum of all allocation and/or assignment scores
The table with the scoring units is in the RIPE NCC Charging Scheme 2008.
Note: Provider Independent (PI) IPv4, Autonomous System (AS) Numbers and IPv6 direct assignments are only taken into account when the assignment was made between 1 October 2006 and 30 September 2007.
The RIPE NCC Billing Algorithm
Scoring unit table
IPv4 Allocation |
IPv6 Allocation |
AS Number Assignment |
IPv4 PI
Assignment |
IPv6 Direct
Assignment |
Scoring Unit |
Only includes assignments made between
1 October 2006 – 30 September 2007 |
/22 |
/33 |
|
/25 |
|
0.5 |
/21 |
/32 |
1 |
/24 |
1 |
1 |
/20 |
/31 |
2 |
/23 |
2 |
2 |
/19 |
/30 |
4 |
/22 |
4 |
4 |
The table above shows how scoring units are determined based on resource usage. To establish scoring units based on larger or smaller resource usage, the same ratio applies.
 |
a i= Scoring unit
t i = Time function of allocation/assignment i (year of allocation -1992)
N = Number of allocations/assignments |
An Example
Resources |
Date |
Scoring Unit |
Age |
Score |
AS |
1 |
20040604 |
1 |
12 (2004-1992) |
12 |
IPv6 |
32 |
20040708
|
1 |
12 (2004-1992) |
12 |
IPv4 |
19 |
20050506
|
4 |
13 (2005-1992) |
52 |
|
Total score |
76 |
|
| Example of resource use |
This table represents an example LIR. The LIR was allocated one AS in 2004. One AS represents one scoring unit, while the age of this allocation (2004 - 1992) equals 12. Multiplying the two gives a score of 12.
The LIR also received a /32 allocation of IPv6 address space in 2004. /32 is also a single scoring unit, while the age for this allocation is also 12. The final score for this IPv6 allocation is 12.
Finally, the LIR was allocated a /19 of IPv4 address space in 2005. /19 represents four scoring units, while the age of this allocation (2005 - 1992) is 13. Multiply the number of scoring units and the age of this IPv4 allocation to produce a score of 52.
This LIR's total score is calculated by adding all these scores, which produces a total of 76.
Based on the billing score boundaries represented in the table below, this LIR is classified in the SMALL billing category for the year 2008.
|
Category |
Maximum Score |
EXTRA SMALL |
18 |
SMALL |
112 |
MEDIUM |
864 |
LARGE |
5,696 |
EXTRA LARGE |
247,003 |
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| Billing Score Boundaries |
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| RELATED TOPICS |
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