Section: 4.3.2.3 CDR generation for online charged subscribers
Content: In offline charging, CDRs are generated in the network and forwarded to the BD for further processing, e.g. generating subscriber bills. In online charging, network resource usage is granted by the OCS based on a subscriber account on the OCS. If required by the operator, CDRs may additionally be generated for online charged subscribers. One way of achieving this is by performing online charging and offline charging simultaneously for these subscribers. Alternatively, the OCS can accomplish this by the use of the appropriate offline charging functions as follows: - A CDF, as specified in clause 4.3.1.2, is employed by each of the OCFs that are required to generate CDRs from the charging events they receive from the CTF; - A CGF, as specified in clause 4.3.1.3, is employed by the OCS in order to generate / manage CDR files and provide these files to the BD.