S-CDR Field Descriptions


S-CDR Field Descriptions
 
 
This chapter lists and describes the fields supported by the system for use in SGSN Charging Data Records (S-CDRs).
The following information is provided for each field:
 
Description: The field’s description.
Format: The field’s data format.
Length: The field’s size, in bytes.
Based on the following standards:
 
Also, refer the SGSN and Mobility Management Charging Detail Record Field Reference Tables chapter for information on CDR fields supported in S-CDRs.
 
CDR Fields
Access Point Name Network Identifier
The network identifier portion of the Access Point Name (APN). The APN typically corresponds to a registered Internet domain name and represents the external packet data network (PDN).
Format
IA5 String
Length
1–65 Bytes
Access Point Operator Identifier
The Operator Identifier part of the APN.
Format
IA5 String
Length
1–37 Bytes
APN Selection Mode
An index indicating how the APN was selected.
The following APN selection mode indexes are possible:
Format
Unsigned Integer
Length
1 Byte
CAMEL Information
Set of CAMEL information related to PDP context. This field is present if CAMEL Charging Information is received by the HLR in ISD message.
Format
Octet String
Length
N/A
Cause for Record Closing
The reason the record is released from the SGSN.
Some of the possible reasons are:
Format
Unsigned Integer
Length
1 Byte
Cell Identifier
Cell identity for GSM or Service Area Code (SAC) for UMTS at “Record Opening Time”.
Format
Octet String
Length
2 Bytes
Charging Characteristics
Lists the charging characteristics applied to the PDP context.
The SGSN can accept charging characteristics from the HLR or use its own. SGSN-configured charging characteristics are specified as part of the operator policy and are applied to subscriber PDP contexts through SGSN-Operator-Policy templates.
Format
Hex Value Octet String
Length
2 Bytes
Charging Characteristics Selection Mode
The charging characteristic (CC) type that the SGSN applied to the CDR. The following values for this field are supplied:
Format
Enumerated Integer
Length
1 Byte
Charging ID
The PDP context identifier used to identify the PDP context in different records created by GSNs.
Format
Unsigned Integer
Length
1–4 Bytes
Diagnostics
This field is included in the CDR when the PDP context is released. This field is supported in G-CDRs but not for eG-CDRs.
It will contain one of the following values:
Format
Unsigned Integer
Length
1 Byte
Duration
The time period, in seconds, that the record existed in the SGSN. It is the duration from “Record Opening Time” to record closure. For partial records, only the duration of the individual partial record is provided.
Format
Unsigned Integer
Length
1–5 Bytes
Dynamic Address Flag
The presence of this field indicates that the Served PDP Address was dynamically assigned during context activation.
Format
Boolean
Length
1 Byte
GGSN Address
The binary-represented IPv4 address of the GGSN used.
Format
Hex Value Octet String
Length
4 Bytes
List of Traffic Data Volumes
A list of the changes that occurred in the charging conditions for this PDP context.
The list will include one or more containers each including the following fields:
For GPRS, data volumes are in octets above the GTP layer and are separated for uplink and downlink traffic. In UMTS, data volumes are in octets above the GTP-U layer and are separated for uplink and downlink traffic.
Format
Length
Local Record Sequence Number
Consecutive record number created by the node. For a Node ID, this number is allocated sequentially for each CDR. This along with a Node ID uniquely identifies a CDR.
Format
Unsigned Integer
Length
1–4 Bytes
Location Area Code (LAC)
Indicates the LAC at “Record Opening Time”.
Format
Octet String
Length
2 Bytes
MS Network Capability
The mobile station network capability.
Format
Octet String
Length
1–8 Bytes
Network Initiated PDP Context
The presence of this field indicates that the PDP context was initiated by the network.
Format
Boolean
Length
1 Byte
Node ID
The identifier string for the SGSN that had generated the CDR. Node ID along with local record sequence number uniquely identifies a CDR.
Format
Octet String
Length
1–20 Bytes
PDP Type
The PDP context type. The PDP types supported by the SGSN are IP or PPP (including IHOSS:OSP).
Format
Hex Value Octet String
Length
2 Bytes
Radio Access Technology (RAT) Type
The SGSN may include the RAT Type IE along with User Location Information IE, and MS Time Zone IE if they are available. The RAT Type IE is not included for the MS-initiated PDP Context Modification procedure.
Format
Integer (1-255).
Length
1 Byte
Record Extensions
A set of network operator or manufacturer specific extensions that may be added to the record if provided. It is used for reporting flows and volumes consumed, and also for passing key information about the session into the downstream charging systems.
Important: This field is customer specific.
Record Opening Time
The timestamp at which the PDP context was activated on the SGSN.
Format
BCD Encoded Octet String
Length
9 Bytes
Record Sequence Number
A running sequence number used to link partial records generated by the SGSN for a specific PDP context (characterized with the same Charging ID and SGSN address pair). This field is only present in case of partial records.
Format
Unsigned Integer
Length
1–5 Bytes
Record Type
Indicates the SGSN PDP context record type.
Format
Integer
Length
1–4 Bytes
RNC Unsent Downlink Volume
The downlink data volume that the RNC has not sent to MS. This field is present when the RNC has provided unsent downlink volume count at RAB release.
Format
Unsigned Integer
Length
1–5 Bytes
Routing Area Code (RAC)
Indicates the RAC at “Record Opening Time”.
Format
Octet String
Length
1 Byte
Served IMEI
The International Mobile Equipment Identity (IMEI) of the MS, if available.
Format
BCD Encoded Octet String
Length
8 Bytes
Served IMSI
The International Mobile Subscriber Identity (IMS) of the MS. The IMSI is formatted in accordance with 3GPP TS 23.003. This will be present if the Anonymous Access Indicator is FALSE or not supplied.
Format
BCD Encoded Octet String
Length
3–8 Bytes
Served PDP Address
The binary-represented IPv4 address associated with the PDP context for the CDR. This address could either be static or dynamically assigned.
Format
Hex Value Octet String
Length
4 Bytes per address
Served MSISDN
The primary Mobile Station (MS) ISDN number (MSISDN) of the subscriber.
Format
BCD Encoded Octet String
Length
1–9 Bytes
SGSN Address
The SGSN IPv4 addresses (binary-represented) used over the duration of the CDR. The address(es) can be either user or control-plane addresses.
Format
Hex Value Octet String
Length
4 Bytes per address
SGSN Change
Present if this is first record after SGSN change.
Format
Boolean
Length
1 Byte
 
 

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