## C.2 AOC-S

24.6473GPPAdvice Of Charge (AOC) using IP Multimedia (IM) Core Network (CN) subsystemRelease 16TS

The AOC-S service provides tariff information at the start of the call or when tariff changes occur during the call.

## C.2.1 Charged Items

AOC-S can provide a list of charged items.

Following charged items are thought applicable:

– basic communication;

– communication attempt;

– communication setup;

– operation of supplementary services.

### C.2.1.1 Charged Item: basic communication

This expresses the rate for the basic communication.

The rate shall be expressed as:

– price per time unit and unit time (see subclause C.2.2.1); or

– free of charge (see subclause C.2.2.2); or

– flat rate (see subclause C.2.2.3); or

– not available (see subclause C.2.2.6).

### C.2.1.2 Charged Item: communication attempt

This expresses the cost of a communication attempt.

The cost shall be expressed as:

– free of charge (see subclause C.2.2.2); or

– flat rate (see subclause C.2.2.3); or

– not available (see subclause C.2.2.6).

### C.2.1.3 Charged Item: communication setup

This expresses the cost of a communication setup.

The cost shall be expressed as:

– free of charge (see subclause C.2.2.2); or

– flat rate (see subclause C.2.2.3); or

– not available (see subclause C.2.2.6).

### C.2.1.4 Charged Item: operation of services

This expresses the cost induced by the execution of services.

The cost shall be expressed as:

– price per time unit and unit time (see subclause C.2.2.1); or

– free of charge (see subclause C.2.2.2); or

– flat rate (see subclause C.2.2.3); or

– not available (see subclause C.2.2.6).

## C.2.2 Expressing Charging Rates

AOC-S can express charging rate as:

– price per time unit and unit time (see subclause C.2.2.1); or

– free of charge (see subclause C.2.2.2); or

– flat rate (see subclause C.2.2.3); or

– charging unit (see subclause C.2.2.5); or

– not available (see subclause C.2.2.6).

### C.2.2.1 duration charge: Price per time unit, and unit time

Duration charge shall contain the following elements:

– currency identifier (see subclause C.5.4); and

– currency amount (see subclause C.5.5); and

– length of time unit (see subclause C.5.6); and

– type of charging (see subclause C.5.8).

and additionally it may contain the following element:

– granularity (see subclause C.5.7).

### C.2.2.2 specific: free of charge

This rate represents a free charge.

### C.2.2.3 specific: flat rate

It shall be expressed as:

– currency identifier (see subclause C.5.4);

– currency amount (see subclause C.5.5).

### C.2.2.5 Charging unit

Charging unit shall contain the following elements:

– currency identifier (see subclause C.5.4); and

– currency amount (see subclause C.5.5).

### C.2.2.6 not available

Expresses that the charging information is not available.