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:
 
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Description: The field’s description.
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Format: The field’s data format.
•
Length: The field’s size, in bytes.
Based on the following standards:
 
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3GPP TS 32.298 V6.5.0 (2006-09): 3rd Generation Partnership Project; Technical Specification Group Service and System Aspects; Telecommunication management; Charging management; Charging Data Record (CDR) parameter description (Release 6)
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3GPP TS 32.251 V6.10.0 (2007-06): 3rd Generation Partnership Project; Group Services and System Aspects; Telecommunication management; Charging management; Packet Switched (PS) domain charging (Release 6)
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:
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0: MS or network provided APN, subscribed verified
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1: MS provided APN, subscription not verified
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2: Network provided APN, subscription not verified
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:
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normalRelease (0): The PDP context was terminated normally through a PDP context release (end of context or SGSN change) or a GPRS detach.
•
abnormalRelease (4): The PDP context was abnormally terminated.
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volumeLimit (16): The CDR is released due to exceeding volume limit.
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timeLimit (17): The CDR is released due to exceeding time limit.
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maxChangeCond (19): The CDR is released due to exceeding the changed condition limit.
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managementIntervention (20): The record was closed due to an O&M request.
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intraSGSNIntersystemChange (21): The CDR is released when MS moves from 3G<->2G and vice versa within the same SGSN.
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Partial Record Generation: A partial CDR was generated for reasons such as the reaching of data volume or time (duration) limits, or reaching the maximum number of charging condition changes, or intraSGSNIntersystemChange change.
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:
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Home Default: SGSN configured charging characteristics for home subscribers are used. Home subscribers are those that belong to the same PLMN as the one on which the GGSN is located.
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Visiting Default: SGSN configured charging characteristics for visiting subscribers are used. Visiting subscribers are those that belong to a different PLMN than the one on which the GGSN is located.
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Roaming Default: SGSN configured charging characteristics for roaming subscribers are used. Roaming subscribers are those that are serviced by an SGSN belonging to a different PLMN than the one on which the GGSN is located.
•
subscriptionSpecific: This CC will be applied to S-CDR only if aPNSpecific CC is absent.
•
aPNSpecific: For S-CDR priority will be given to aPNSpecific Charging Characteristics Selection mode. The aPNSpecific mode is from HLR (ISD Message).
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:
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36: If the SGSN sends Delete PDP Context request
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38: If the SGSN sends Delete PDP Context request due to GTP-C/U echo timeout with SGSN
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26: If the SGSN sends Delete PDP Context request for any other reason
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:
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QoS negotiated: Quality of service (QoS) has been negotiated. The initial and final corresponding data values are listed. This is only added for the first container and the container after a QoS change.
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Uplink volume: The number of octets (uncompressed) received from the MS. The initial and final corresponding data values are listed.
•
Downlink volume: The number of octets (uncompressed) transmitted to the MS.The initial and final corresponding data values are listed.
•
Change Condition: Identifies the reason that the container was closed such as tariff time change, QoS change, or closing of the CDR.
•
Change Time: A timestamp identifying the time at which the volume container or the CDR closed.
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
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QoS negotiated: Octet String
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Uplink volume: Integer
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Downlink volume: Integer
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Change Condition: Integer
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Change Time: BCD Encoded Octet String
Length
•
QoS negotiated: 12 Bytes
•
Uplink volume: 4 Bytes
•
Downlink volume: 4 Bytes
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Change Condition: 1 Byte
•
Change Time: 9 Bytes
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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