5 General

12.053GPPSubscriber Related Call and Event DataTS

Call and event data from the Mobile Services Switching Centres (MSCs), Base Station Systems (BSSs) and location registers (HLR/VLR) is required for a number of network management activities including, but not limited to, the following:

– the billing of home subscribers, either directly or via service providers, for network utilisation charges;

– the settlement of accounts for traffic carried or services performed by fixed network and other operators;

– the settlement of accounts with other PLMNs for roaming traffic via the transferred account procedure;

– statistical analysis of service usage;

– as historical evidence in dealing with customer service and billing complaints;

In addition to the information collected from these network elements, network management functions are required for the administration of on-line charging data stored in the MSCs. This data is employed to drive the charge display in the Mobile Station (MS) as required by the advice of charge (AoC) service and defined by GSM 02.86 [13] and GSM 02.24 [12].

The present document describes the network management interfaces and functions required in terms of the Telecommunications Management Network (TMN) information model defined by the CCITT (see CCITT M.3010 [3] and GSM 12.00 [18]).

For the purpose of the present document, the call and event data is considered to be collected, in real-time, by network element function (NEF) blocks located within the MSCs, BSSs and location registers.

The data collected by the NEFs is sent to, or collected by, the appropriate Operations System Function (OSF) blocks for storage and further processing.

Similarly, the tariff data required by the NEFs to provide on-line charging information is distributed by the appropriate OSF.

The location of the OSF is implementation specific and may, for example, be provided either by an Administration Centre (ADC) or integrated within the network elements themselves.