Section: 5.4 Charging data configuration
Content: Charging interface applications are specified for Rf and Ro in TS 32.299[ Telecommunication management; Charging management; Diameter charging applications ]  [50], for Nchf in TS 32.291[ Telecommunication management; Charging management; 5G system, charging service; Stage 3 ] [58], for Ga in TS 32.295[ Telecommunication management; Charging management; Charging Data Record (CDR) transfer ]  [54], and for Bx in TS 32.297[ Telecommunication management; Charging management; Charging Data Record (CDR) file format and transfer ]  [52] and TS 32.298[ Telecommunication management; Charging management; Charging Data Record (CDR) parameter description ]  [51]. The middle tier TSs determine per domain / service /subsystem which of the reference points exist as open interfaces and which of them are internal to integrated NEs (see charging architecture mapping discussion in clause 4.5). In accordance with these prerequisites, the content of charging events, i.e.Information Element (IE), and CDRs, i.e. CDR parameter, is also specified in the middle tier TSs on all the open network interfaces that exist in the respective domain / subsystem / service. The rules governing the presence of IEs or CDR parameters on these interfaces are summarized in this clause. A logical diagram illustrating the possible presence requirements for IEs / CDR parameters ("field categories") is shown in figure 5.4.1. Figure 5.4.1: Logical diagram illustrating the different parameter categories The IE and CDR parameter description tables in the middle tier TSs specify the Mandatory (M), Conditional (C) and Operator provisionable (OC or OM) designations. The category of an IE or CDR parameter can have one of two primary values: M This parameter is Mandatory and shall always be present in the event / CDR. C This parameter shall be present in the event / CDR only when certain Conditions are met. These Conditions are specified as part of the parameter definition. All other parameters are designated as Operator provisionable (O). Using network management functions or specific tools provided by an equipment vendor, operators may choose if they wish to include or omit the parameter from the charging event / CDR. Once omitted, this parameter is not generated in an event / a CDR. To avoid any potential ambiguity, the CTF / CDF / CGF shall be able to provide all these parameters. Only an operator can choose whether or not these parameters should be generated in their system, i.e. included in the charging event / CDR. Those parameters that the operator configures to be present are further divided into mandatory and conditional categories: OM This is a parameter that, if provisioned by the operator to be present, shall always be included in the events / CDRs. In other words, an OM parameter that is provisioned to be present is a mandatory parameter. OC This is a parameter that, if provisioned by the operator to be present, shall be included in the events / CDRs when the specified conditions are met. If provisioned by the operator not to be present, shall not be included in the events / CDRs even the specified conditions are met. In other words, an OC parameter that is configured to be present is a conditional parameter. The IE and CDR parameter tables provide a brief description of each charging event / CDR in the corresponding middle tier TSs. The full definitions of the CDR parameters, sorted by the CDR parameter name in alphabetical order, are provided in TS 32.298[ Telecommunication management; Charging management; Charging Data Record (CDR) parameter description ]  [51]. The following principles apply for Information Element (IE) and CDR parameter category across the specifications: - Category for IEs common between the middle tier TSs (stage 2) and TS 32.290[ Telecommunication management; Charging management; 5G system; Services, operations and procedures of charging using Service Based Interface (SBI) ]  [57]: IE category in the middle tier TSs takes precedence; - IE category in the middle tier TSs takes precedence over the corresponding IE stage 3 category and syntax in TS 32.291[ Telecommunication management; Charging management; 5G system, charging service; Stage 3 ] [58] and TS 32.299[ Telecommunication management; Charging management; Diameter charging applications ] [50]. - CDR parameter category in the middle tier TSs takes precedence over the corresponding ASN.1 field syntax in TS 32.298[ Telecommunication management; Charging management; Charging Data Record (CDR) parameter description ]  [51].